Toothed half-coupling on the shaft of ethern pumps. Tooth couplings with polyamide sleeve

In any mechanism for which the shafts are used to actuate, there is always a connecting part and is called a gear coupling.

If there are two shafts that need to be connected along the same axis or at an inclination to each other, then the best way to transfer loads and forces is a semi-rigid connection using a gear coupling. A single gear coupling is installed on the condition that only angular displacement is allowed between the shafts. If there is a need to compensate also for radial or axial displacement, then two single couplings are installed. The gear coupling has increased reliability and good bearing capacity, since it is equipped with a large number of teeth. Such couplings work well in mechanisms with a high rotational speed (cranes, conveyor equipment).

Couplings successfully compensate for radial, angular and axial displacements of the shafts due to the presence of lateral clearances in the engagement and on the teeth of the sphere bushings. All parts that make up the coupling are made of steel: for a shaft with a diameter of up to 140 mm - forged, and for large diameters - cast. To increase the wear resistance of the teeth, they are heat treated, and viscous oil is introduced into the coupling.

In principle, functionally, the gear coupling has much in common with, although it compensates for smaller angular displacements, but has a large torque per unit volume.

Features of Gear Couplings

The gear coupling consists of two coupling halves connected by bolts and two bushings inserted into the drum cages. Between themselves, they are engaged with teeth of a spherical shape. Such couplings are standardized according to GOST 5006-55 for shafts with diameters from 40 to 560 mm. There are also other standards for gear couplings, which are used for unification in all CIS countries, depending on the torque, for example, GOST R 50895-96 (Russia), DSTU 2742-94 (Ukraine).

The wide scope of application and the various requirements that apply to couplings have led to the fact that today couplings are divided into several classification groups according to their design features.

So, they are divided into permanent, coupling and self-guided, and by the nature of the work - into rigid and elastic.

According to the design, there are couplings with a split cage (gear coupling GOST 5006-55-MZ), with a one-piece cage and with intermediate shaft(GOST 5006-55 - MZP).

For the short ends of the shaft, bushings are made for the coupling according to GOST 12080 with cylindrical holes, and according to GOST 12081 - with conical holes.

Also, gear couplings can be manufactured in accordance with the customer's specifications. If the customer needs an exclusive gear coupling, the drawing must accurately reflect all the necessary parameters.

When mounting couplings, certain features should be observed, in particular, mounting on the shaft should be carried out with a slight heating.

Recently, gear couplings made of polymer compounds (kapron, caprolon) have been actively used. Increased elasticity and the ability to more evenly distribute the load on the teeth, puts them on a par with metal ones. In addition, couplings made of polymers have higher electrical insulating properties and win in price.

And rigid compensation of their axial, radial and angular displacement. It has a large load capacity. Thanks to the couplings, it is possible to turn on and off the executive body with a constantly running engine. According to GOST R 50895-96, couplings transmitting torque in the range from 1000 to 63000 N * m are general industrial, more - special purpose.

Gear couplings are produced in accordance with GOST R 50895-96. Couplings transmitting torque in the range from 1000 to 63000 N * m are general industrial, more - special purpose.

When is a clutch considered inoperative?

• at least one tooth has broken or;
• the appearance of cracks on bushings and clips and their destruction (except for teeth);
• there was a breakdown of at least one fastener;
• at least one was destroyed;
• there is a leakage of lubricant at the exit points of the shafts and along the connectors with an intensity that causes the formation and fall of drops.

Buy couplings MZ and MZP in the company "El-Kran"

If your specialist, after a thorough examination of the failed clutch, qualifies that it cannot be repaired, but requires a complete replacement, our company is ready to supply this spare part within 10 working days. The warranty period of the coupling is one year from the date of commissioning. The procedure for calculating the warranty period is in accordance with GOST 22352-77.

If there is information about the symbol of the coupling requiring replacement, this will help to buy a gear coupling, speeding up the process of selecting a new one.

An example of a type designation for a type 1 coupling with a rated torque of 4000 Nm, a bore diameter in bushings of 50 mm, with bushings of version 1, climatic modification U, category 2:
Coupling 1-4000-50-1U2 GOST R 50895-96

The same, type 2, with the diameter of the mounting holes in the flange half-couplings 55 mm:
Coupling 2-4000-50-55-1U2 GOST R 50895-96

The same, type 3 with index C:
Coupling ZS-4000-50-1U2 GOST R 50895-96

It is allowed not to indicate the designation of the climatic version in the working drawings.

Drawing 20.1. Coupling gear with intermediate fastening to the shaft type B

Drawing 20.2. Coupling gear type A

• D – coupling diameter,
• d is the diameter of the cylindrical ends of the shafts,
• L is the length of the coupling,
• l is the length of the cylindrical part of the shaft end.

Table 20. Overall dimensions and technical characteristics of gear couplings

Flexible gear coupling with double arc teeth

INTRODUCTION
The Flexible Gear Coupling is a consistent, common goal of producing commercial couplings that meet the high quality standards and technical and performance characteristics that characterize industrial couplings. Power transmission is a special area of ​​application for flexible couplings, which provide flexible connection of rotating elements.
In addition to transmitting torque, gear couplings can compensate for radial and angular misalignment and minimize axial slip. Thanks to their state-of-the-art design and extreme precision in machining and quality control, the couplings provide high performance (compared to other couplings in this category), making them suitable for any industrial application.

DESIGN
From a structural point of view, flexible gear couplings are made of two symmetrical steel bushings and synthetic resin sleeves to provide connection and power transmission between the two bushings.
Each of the two low-carbon steel bushes with anti-corrosion surface treatment is equipped with a ring gear.
Hollow sleeve with internal injection molded teeth made of high molecular weight semi-crystalline technopolymer.
This material, whose origin is confirmed by a certificate, meets the temperature conditions and is filled with a grease that increases the self-lubricating properties of this polymer.
Double curved teeth of both bushes, having a certain pitch, obtained on CNC machines, provide optimal performance, compensate for angular and radial axial deviations of a dynamic type, even under load.
In the case of equal torque transfer, the special tooth geometry significantly minimizes surface pressure while increasing the wear resistance of the coupling as well as its load transfer capability.

The relative resistance of the polymer to ambient humidity and its ability to withstand temperatures from -20°C to +120°C with short-term peaks up to +150°C allow the coupling to ideally withstand harsh working conditions even in aggressive environments.

FEATURES AND BENEFITS
- Compact design, reduced weight and moment of inertia
- Movement at a constant speed
- Silent operation, elastic shock and vibration absorption
- Resistance to the most common chemicals and moderate heat, max. 80оС
- Self-lubricating ability, no conductivity and no need for maintenance
- Reasonable price, ease of assembly, compliance with many types of work, even in the most difficult conditions.

Off axis

Centered shafts

Radial deflection

Angular deviation

Radial and angular deviation

CLUTCH SELECTION
Selection based on torque: The coupling must be selected based on the maximum torque of the motor, which must not exceed the allowable peak torque of the coupling.

Technical details

(1) Refers to standard coupling kit with maximum bore and no keyways.
(2) By bushing

ASSEMBLY INSTRUCTIONS
a) Attach the two coupling halves to their respective shafts, making sure that they are inner sides are on the same level with the ends of the shafts.
b) Push the sleeve onto the two coupling halves, while adjusting the distance between them (distance „S“) and the axial alignment of both shafts.
c) Install the two elements to be connected in the appropriate position.
d) Before rotating the coupling, make sure that the sleeve moves freely along the axis.

Steel C.43 UNI 7847

CODE EXPLANATION EXAMPLE

SG-14-CC = with 2 short sleeves

SG-14-LC = long-short sleeve

SG-14-LL = long-long sleeve

Gathering distances

On request: Full bore according to ISO standards, H7 tolerance, keyways according to DIN 6885, JS9 tolerances. Holes for screws.

Type of	The code
Full Gear CouplingSG-CC	SGCC014 SGCC019 SGCC024 SGCC028 SGCC032 SGCC038 SGCC042 SGCC048 SGCC055 SGCC065
Full Gear CouplingSG-LC	SGLC014 SGLC019 SGLC024 SGLC028 SGLC032 SGLC038 SGLC042 SGLC048 SGLC055 SGLC065
Full Gear Coupling SG-LL	SGLL014 SGLL019 SGLL024 SGLL028 SGLL032 SGLL038 SGLL042 SGLL048 SGLL055 SGLL065
Short sleeve SG-C	SG0C014 SG0C019 SG0C024 SG0C028 SG0C032 SG0C038 SG0C042 SG0C048 SG0C055 SG0C065
Coupling long sleeve SG-L	SG0L014 SG0L019 SG0L024 SG0L028 SG0L032 SG0L038 SG0L042 SG0L048 SG0L055 SG0L065
Polyamide sleeve SG-M	SG0M014 SG0M019 SG0M024 SG0M028 SG0M032 SG0M038 SG0M042 SG0M048 SG0M055 SG0M065

Coupling Design Analysis

The following designs of couplings are often found in the metallurgical industry.

1. flange coupling is the most reliable and widespread type of rigid couplings. It consists of two coupling halves with flanges mounted on the ends of the shafts, the flanges are tightened with bolts.
   To ensure alignment, the coupling halves are centered either with a protrusion on one flange and a recess on the other, or with intermediate half rings. For greater mating accuracy and prevention of shaft bending in couplings, strict perpendicularity of the end surfaces of the coupling halves to the shaft axis must be ensured. Material - steel 40 and 35L.
   Coupling halves are alternately connected by semi-clean bolts inserted into the hole with a gap, and clean bolts inserted into the hole without a gap.
2. gear couplings - the most common type of rigid compensating couplings, used to connect horizontal coaxial shafts and are able to compensate for displacements of the shaft axes.
   General purpose gear coupling consists of two coupling halves with internal teeth and two bushings with external teeth.
   Toothed bushings are made with a straight or elliptical generatrix. Compensation for shaft displacements is achieved by misalignment of the bushings relative to the cages due to side clearances and the spherical surface of the outer teeth.
3. Cam-disc clutches– designed to connect shafts with significant radial misalignments, allow minor angular and axial misalignments. The coupling consists of two half-couplings and an intermediate disk with cams located crosswise and entering the corresponding grooves on the half-couplings. The transmission of torque is carried out by the cams of the disk, which, with displaced shafts, slide along the side surface of the grooves. The center of the disk during the rotation of the shafts describes a circle in space.
   The conjugation of the cams and grooves is taken by fit with a gap. The presence of gaps in this interface impairs the operation of the coupling due to an increase in edge pressures on the contact surface.
   Flaws: unsatisfactory work even with small distortions; significant wear of working surfaces; the presence of centrifugal force acting on the disk; friction losses and the need for lubrication, reduced reliability. Dignity: the ability to compensate for significant radial displacements of the shaft axes.
4. Articulated Couplings use the principle of operation of Hooke's spatial hinge, serve to transmit torque between shafts with a large angular displacement of the axes, which can change during the rotation of the coupling.
   Typically, the coupling consists of two forks and an intermediate part in the form of a cross, pivotally connected to the ends of the forks. By connecting two couplings, it is possible to ensure the transmission of torque with a significant radial displacement of the shaft axes.
   Articulated couplings are used: to compensate for inaccuracies in the relative position of the shafts that occur during assembly; transmission of rotation to the shafts, the position of which changes during operation.
   In the presence of an angular displacement of the axes of the connected shafts, the rotation of the driven shaft of a single articulated coupling occurs unevenly with uniform rotation of the drive shaft. Periodic lagging and advancing of the driven shaft relative to the nominal positions corresponding to uniform rotation causes dynamic loads.
5. Couplings with serpentine springs. The coupling halves are connected by an elastic element made in the form of a serpentine spring located on a cylindrical surface. The clutch consists of half-couplings with teeth, between which 6-8 sections of serpentine springs are placed. To protect the spring from falling out and retaining the lubricant (usually plastic), there is a casing consisting of two halves, tightened with screws.
   The spring is the most critical part of the clutch. It is made of spring steel with tensile strength σ t= 170 MPa. In heavy couplings, the springs are installed in two or three rows. Such couplings are characterized by high reliability in operation and small overall dimensions. These properties have led to their widespread use in heavy engineering (rolling mills, steam turbines), despite the complexity of the design, low technology and the need for control in operation.
6. Couplings with a toroidal elastic element. The elastic element of the coupling is a rubber or rubber-cord sheath. The rubber-cord sheath is more difficult to manufacture than the rubber one, but its service life is several times longer than the rubber one. These couplings are distinguished by high compensating properties, the ability to reduce dynamic loads due to low torsional stiffness and high damping capacity. The disadvantages of couplings include their large diameter and the appearance axial loads on the shaft supports caused by centrifugal forces acting on the elastic element.
   In a coupling with a toroidal shell, the coupling halves are connected by an elastic element in the form of a toroidal shell made of rubber or reinforced rubber. The pressure ring consists of half rings, screwed to the ring. Using screws, the side of the elastic element is clamped between the coupling half flange and the pressure ring, creating friction forces between rubber and metal. The width of the ring is chosen so that when the metal parts come into contact, as a result of tightening the screws, the rubber is compressed by a given amount. The design allows the replacement of the elastic element without axial displacement of the coupling halves.
   The coupling is characterized by increased ability to work reliably with significant mutual displacements of the connected shafts. The greater these displacements, the shorter the service life of the elastic element, since with the radial and angular displacement of the shafts, cyclic stresses arise in the rubber, causing it to heat up and reduce strength.
7. Sleeve-pin coupling consists of two coupling halves connected by bolts - fingers with rings made of elastic material (rubber, leather) put on them. The coupling half also serves as a brake pulley. In the coupling half flange, pins are reinforced with tapered shanks, on which elastic rubber bushings are put on. The elastic bushings enter the holes located in the coupling half flange.
8. Couplings with metal discs structurally very simple and do not require special care during operation ().

   Figure 6.2 - Coupling with metal discs: 1 - right half-coupling; 2 - nut; 3 - left coupling half; 4 - disks; 5 - bolt

   The coupling consists of two identical halves 1 and 3 and a set of plate discs 4. Bolts 5 and nuts 6 discs 4 are attracted to the coupling half 1, and bolts 7 and nuts 8 - to the connecting insert 2.
   Couplings are used in reversing drives and mechanisms with remote control, which require exact repetition of a given program by the actuating element. Couplings are able to work with significant angular and axial displacements. The radial stiffness of such couplings is commensurate with the rigidity of the shafts, therefore, in the presence of radial displacements, double couplings are used. Double couplings are used in cases where it is necessary to compensate for significant axial displacements and reduce the axial stiffness of the coupling. These couplings do not require lubrication, allow increased misalignment of the articulated shafts in transient conditions, and also have high compensating, vibration isolating and damping properties.
   The parting planes of the coupling halves must be strictly perpendicular to the axes of the shafts. Coupling halves are fixed on the shafts with the help of keys (on a conical shaft - with an axial nut); fixation of the coupling halves in the axial direction is carried out by end fastening or set screws.

Care and supervision of couplings

When accepting replacements, the couplings are inspected in cases where instructions are given in the rules for the technical operation of certain types of equipment. During inspections it is necessary:

• check whether the fit of the coupling halves on the shafts has been disturbed;
• check (by tapping) the reliability of the tightening of the bolt fasteners in the place of the coupler separation;
• inspect the condition and fastening of the coupling covers.

At least once every 10-15 days, the presence of oil in gear couplings is checked and topped up to the control level. To check the amount of oil in the coupling, it is recommended to fill the coupling with a measured amount of lubricant, turn it so that oil appears at the filler hole (). This position must be marked with a punch at the top of the flange in order to later know the position of the coupling for oil filling. It is not allowed to operate gear couplings, in which, due to wear of the seals, splashing (leakage) of the lubricant occurs during operation. Coupling teeth with serpentine springs are lubricated at least once every 15 days.

Figure 6.3 - Scheme for checking the oil level in the gear coupling

Revisions and repair of couplings

Couplings should be inspected during scheduled shutdowns of equipment for repairs within the following periods:

• transversely rolled, longitudinally rolled, sleeve-finger and serrated - at least once every 45 days;
• compensating couplings with an intermediate disk - at least once a month;
• Couplings with a serpentine spring (Bibbi) - at least once every 15 days.

Before disassembling the couplings, it is necessary to check the marking or carry out punching: gear couplings on both coupling halves and on the side surfaces of the sleeve and coupling half; couplings with a serpentine spring on the teeth of both halves of the couplings.

When inspecting couplings (regardless of design), it is necessary:

• check the condition of the coupling halves for cracks (the presence of cracks is detected by the sound when lightly tapped with a hammer, by oil smudges and dust accumulation near damaged areas or by spots that appear when lightly tapped with a hammer;
• check the stability of the fit of the coupling halves on the shafts;
• check the gap between the end planes;
• check the mutual arrangement of the axes of the connected shafts.

When shifted along the axis, or when the fit on the shaft is weakened, the coupling halves are replaced.

It is not allowed to install gaskets between the shaft and the hole of the hub of the coupling halves and punching the shaft to ensure the tightness of the connection; it is forbidden to weld half-couplings to the shaft. Coupling halves of couplings of all types, bushings of gear couplings, in which a crack is found, are subject to mandatory replacement.

When inspecting gear couplings, it is necessary ( , , ):

• check the condition and wear of the teeth of the coupling halves and bushings;
• check the condition of the sealing rings;
• check the mutual position of the axes of the connected shafts;
• when assembling after revision or repair, rinse the internal cavity of the housing with kerosene and, after drying, fill it with fresh lubricant.

Table 6.4 - Normals for the control of axial connections

Table 6.5 - Tolerances for misalignment and radial displacement of the axes of the couplings

Table 6.6 - Permissible wear of the teeth of gear couplings in terms of backlash

Operation of gear couplings is not allowed if more than 10% of the teeth are broken, if the teeth are worn in thickness over 30% of the original size. Dried felt and felt rings should be washed in kerosene, dried and soaked in melted grease; Replace worn O-rings.

In clutches with a serpentine spring, during the revision, the condition of the springs and toothed disks is checked. Broken springs, as well as springs, on the working surface of which cracks and dents are found, are replaced; when removed, suitable springs are marked and laid in the same place where they were previously; scuffs on the surfaces of the teeth are cleaned with a file.

Toothed clutch discs with serpentine springs must be replaced when the teeth are worn in thickness by 30% of the original size, as well as in the presence of broken teeth, if they are unevenly distributed around the circumference and their number exceeds 10% of the total number of teeth. The percentage of tooth wear is determined by the average value of measurements of the thickness of the tooth at three points along the height.

In transversely rolled, sleeve-finger and in couplings with an intermediate disk:

• the value of the relative displacement of the connected shafts, measured using a square and a probe at four diametrically located points of the outer surface of the coupling halves, should not exceed 0.3 mm; when the gap increases above the specified limit, the mechanism is centered;
• the difference in the gap measured with a wedge probe at diametrically opposite points should not exceed 0.001 of the outer diameter of the coupling halves; with an increase in this limit, the mechanisms are subject to centering to ensure the alignment of the connected shafts.

In couplings with an intermediate disc, the gap between the protrusions 4 of the disc 3 and the recesses of the coupling halves 1, 2 should not exceed 0.5-2.0 mm, depending on the size of the couplings and their installation locations.

In sleeve-pin couplings, the development of holes for attaching fingers is not allowed. The maximum gap between the elastic rings and holes in the coupling half is allowed no more than 3% of the pin diameter (counting it to the side). With greater wear, the rings must be replaced, and when making holes, replace the coupling halves.

Coupling half defects

The main defects are:

• cracks;
• shaft bore wear.

Couplings with cracks of any nature and location are subject to rejection.

Coupling halves are considered fit if, due to wear of the hole, the gap in the mating increases by no more than 1.5 times from the maximum possible during manufacture. If the hole size exceeds the allowable one, it is necessary to repair the hole by surfacing.

Couplings gear and any others - quickly and conveniently for the Client!

The company "Promek" has a vast experience in the supply of gear couplings and couplings of other types for various purposes. Our dealer agreements allow us to supply drive couplings at manufacturer's prices, and over the years, proven logistics schemes make our deliveries convenient for our Clients.

Call our managers, set a task - and your application for the couplings necessary for the operation of your equipment will be processed quickly and efficiently.

NPO PromEK supplies:

• safety clutches
• elastic couplings
• cam-disc clutches
• single-row chain couplings
• articulated couplings
• overrunning clutches
• cam clutches
• drive couplings
• couplings
• end couplings
• electromagnetic clutches
• rigid compensating and movable couplings
• couplings for pumps
• couplings for compressors
• couplings for conveyors
• steel lamellar couplings
• highly elastic couplings
• gear couplings with circular teeth
• KTR couplings
• special couplings
• Couplings UKM-12- for placing switching products and protecting them from atmospheric precipitation
• Couplings UPM-24- for cutting cables and connecting them to track circuits
• Couplings RM4-28; RM-28; PM7-49; RM8-112- cable end, cable branching couplings

Delivery to the transport company will be free for you. Delivery in Russia and the CIS will be carried out in the most rational way!

Couplings as connecting devices for shafts

Couplings, connecting devices for shafts, the ends of which are closed or removed by a small distance, ensure the transmission of torque from one shaft to another. As a rule, the geometric axis of one shaft is a continuation of the geometric axis of the other shaft. With the help of couplings, rotation is also transmitted to gears, pulleys, loosely mounted on shafts.

Couplings are not endowed with the function to change the torque and direction of rotation. Some types absorb vibrations, protecting the machine from overload.

In mechanical engineering, couplings of various designs are used very widely. Modern machines are by no means monolithic and consist of separate parts with input and output ends of the shafts, which connected with couplings for various purposes:

• to obtain long shafts from separate parts and compensate for small mounting inaccuracies in the relative position of the connected shafts;
• to give the shafts some mobility during operation;
• to turn individual nodes on and off;
• for the purpose of automatic connection and disconnection of shafts - the performance of automatic control functions;
• to reduce dynamic loads on mechanisms.

If the simplest coupling is made from a piece of a nipple tube and connects the shaft of an electric motor to the impeller of an automobile glass washer, then, for example, jet engine turbocharger couplings consist of hundreds of parts and are the most complex self-regulating systems. The variety of functions predetermines the variety of coupling designs, and as a result, their branched classification.

Couplings and their classification

By the nature of the connection of the shafts, the couplings form several groups.

• Mechanical couplings:

- hard (deaf). Practically do not allow radial, axial and angular displacements of the shafts;

- compensatory. They allow some radial, axial and angular displacements of the shafts, which are compensated by elastic elements - rubber bushings, springs, etc.;

- friction. They allow short-term slippage of the shafts during overloads.

• Couplings of hydraulic or pneumatic action.

Classes of couplings according to the mode of shaft connection

• Non-releaseable (permanent, connecting). Shafts are connected constantly, forming single long shafts. In turn, they are divided into:

- Rigid(one-piece, split in a plane parallel to the shaft and split in a plane perpendicular to the shaft);

- Compensating self-aligning(axial, radial, angular, universal);

- elastic(linear, non-linear).

• Managed (coupled). Shafts are connected and disconnected during operation. They are divided into synchronous and asynchronous (friction) - with mechanical, electrical, hydraulic, pneumatic switching.
• Self-acting (self-managed, automatic). Work automatically at the set operating mode. Are divided into:

- Centrifugal(friction);

- Volumetric(ratchet, friction);

- Safety. The shafts are separated in case of violation of normal operating conditions (with a destructible element, with an indestructible element).

• Others.

According to the ability to reduce dynamic loads, couplings are divided into:

• hard - not smoothing vibrations, shocks and shocks;
• elastic - smoothing vibrations, shocks and shocks due to the presence of elastic elements in their composition.

Most of the couplings used, which are autonomous units, are standardized: the main characteristic in their selection is the transmitted torque.

The coupling, designed to transmit a certain torque, is made in several modifications for different shaft diameters.

Couplings and their designs

Rigid (deaf) couplings can be sleeved or flanged.

Sleeve coupling, the simplest of rigid couplings, is a sleeve fitted to the output ends of the shafts with the help of keys, pins or splines. It is used in low-speed and non-critical machine designs with shaft diameters up to 70 mm. Made from steel 45; couplings of large sizes - from SCH25 cast iron.

flange coupling consists of two coupling halves connected by bolts. To transmit torque, keyed or splined connections are used. Torque is transmitted by frictional forces between the flanges and the bolts themselves when they are inserted without clearance. Flange couplings are standardized in the diameter range of 12...250 mm and transmit torques of 8...45000 Nm. In heavy machines, the coupling halves are welded to the shafts.

These couplings are sometimes called transversely rolled. The alignment of the flanges is carried out by means of a circular ledge on one coupling half, and grooves of the same diameter are made on the other, or by means of a centering ring. They are used for shafts with a diameter of up to 350 mm. Material for flange half-couplings - steel 40, 35L, SCHZO cast iron (for large size couplings).

The most used of this group of couplings consists of two half-couplings with external teeth and a detachable cage with two rows of internal teeth of an involute profile. The gear coupling compensates for radial, axial and angular displacements of the shafts due to lateral gaps in the engagement and turning of the teeth in a sphere, the misalignment of the shafts is compensated by the sliding of the teeth. To increase wear resistance, the teeth are subjected to heat treatment, and lubricant is poured into the coupling. The material of half-couplings and clips is steel 40 or 45L.

Cam-disc clutch consists of two coupling halves with diametrical grooves at the ends and an intermediate floating disk with mutually perpendicular ledges. Friction surfaces are periodically lubricated with grease. The cam-disc clutch is used to connect low-speed shafts (up to 250 rpm). Couplings and disks are made of steel 45L.

It is similar in design to a flange coupling, but instead of connecting bolts, the elastic coupling has steel fingers on which elastic (rubber, leather, etc.) bushings are installed. Elastic elements make it possible to compensate for minor axial displacements of the shafts. Especially widely used for connecting electric motors with actuators with a shaft diameter of up to 150 mm. Coupling half material - steel 35, 35L or SCH25 cast iron; fingers are made of steel 45.

A prominent representative of the family of movable couplings is articulated coupling. The idea of ​​a clutch, first proposed by Girolamo Cardano in 1570, was brought to an engineering solution in 1770 by Robert Hooke. Therefore they are called both cardan couplings and Hooke's joints. Articulated couplings connect shafts at an angle of up to 45 degrees and allow you to create chain shafts with rotation transfer to inaccessible places. This is possible due to the fact that the cross is not one hinge, but two with perpendicular axes.

Flexible couplings designed primarily to dampen shocks, shocks and vibrations, as well as some compensation for shaft misalignment. Their main feature is the presence of a metallic or non-metallic elastic element: these are stars, washers, elastic shells, helical and serpentine springs, bellows, etc.

Couplings designed to connect and disconnect shafts. Some types of clutches allow this to be done without stopping the electric motor. Clutches are sometimes called manageable. According to the principle of operation, cam and friction clutches are distinguished.

Cam clutches consist of two coupling halves with cams on the end surfaces. The coupling is switched on by means of a coupling half, which can move along the shaft along the guide key or along the splines.

Friction clutches allow smooth clutching at any speed, which is successfully used, for example, in the design of automobile clutches. By design, they are divided into the most common disk - friction occurs on the end surfaces of the disks - conical and cylindrical.

Friction clutches operate as without lubricant ( dry couplings), and with lubricant ( oil couplings). The lubrication system reduces the wear of working surfaces, but complicates the design of the coupling. The material for friction clutches is structural steel, SCh30 cast iron. Friction materials: pressed ferrodo asbestos-wire fabric, friction plastic, powder materials, etc. - are used in the form of overlays.

Self-guided clutches designed for automatic separation of the shafts depending on the change of one of the following parameters: torque - safety clutches, directions of rotation - overrunning, and rotation speeds - centrifugal.

Safety clutches have the function of limiting the transmitted torque, which protects the machine from damage during overloads. The most widespread are safety cam, ball and friction clutches. For the manufacture of parts of safety couplings, depending on the type of coupling, structural steels, SCHZO cast iron, friction materials, ShKh12 steel, etc. are used. Pins for couplings with a collapsing element are made of steel 45, bushings are made of steel 40X with hardening.

Call our managers, set a task - and your application for gear couplings and other drive couplings will be processed quickly and efficiently.