Toothed elastic coupling with an intermediate shaft. Tooth couplings with polyamide sleeves

gear clutch serves to transfer rotation from the engine to the working body (usually through a gearbox), while it compensates for minor angular, radial and axial displacements during torque transmission.

Gear coupling parts are made of steel by forging or casting, because these parts withstand heavy loads, operating in a wide range of speeds. The coupling consists of bushings, clips and flange half-couplings. In a gear coupling, one of the cages can be replaced by a coupling half, while the shaft is pressed directly into it (type 2).

Cog coupling bushings are produced with cylindrical (version 1) or conical (version 2) holes for short shaft ends. Tooth surfaces of gear couplings necessarily heat treated.

Gear couplings manufactured in the following types:

• Type 1 - gear couplings with a detachable cage (MZ - designation according to GOST 5006-55). These couplings are used for direct connection of shafts;
• Type 2 - gear couplings with an intermediate shaft (MZP - designation according to GOST 5006-55). Used to connect shafts using an intermediate shaft;
• Type 3 - gear couplings with one-piece cage. The field of application is similar to the couplings of the first version.

Coupling bushings are made in the following versions:

1. - with cylindrical holes for short shaft ends according to GOST 12080.
2. - with tapered holes for short shaft ends according to GOST 12081 for couplings of types 1 and 3.

It is allowed, at the request of the consumer, to produce bushings with holes for the ends of shafts of a different shape. In couplings, a combination of bushings of various designs is allowed.

Type 1 and 3 couplings connect the shafts directly, while Type 2 couplings connect the shafts through an intermediate shaft.

The misalignment of the axis of each sleeve relative to the axis of the clip is not more than 1º30".

Bushings and clips, as well as flange half-couplings, are made forged from steel grade not lower than 40 according to GOST 1050-74 and 35XM according to GOST 4543-71, or cast from steel not lower than grade 40L according to GOST 977-75.

The surface hardness of the teeth of bushings and clips is 42…51 HRC.

1 - bushing; 2 - clip1 - bushing; 2 - clip; 3 - flange half-coupling; 4 - intermediate shaft

1 - bushing; 2 - clip

Overall and connecting dimensions

Table note:

1. Rated torque is the maximum torque transmitted by the coupling during its service life in continuous operation with constant load and constant direction of rotation.
2. It is allowed, at the request of the consumer, to manufacture couplings with dimensions d smaller than those indicated in the table.
3. The outer diameter of type 3 couplings must correspond to the dimension D1, and the parameters and other dimensions - given in the table.
4. Assembly options for type 2 gear couplings with mounting holes of version 2 are allowed.
5. In gear couplings of type 2, the seat size of flange half-couplings can be increased to any values ​​in accordance with GOST 12080 and GOST 12081, without entailing changes in other dimensions and parameters according to the table

Complete set of gear couplings

Parameters of gear connection of gear couplings

Figure 43. gear clutch

The gear coupling (fig. 43) transmits torque by kinematic closure through external and internal gearing with an involute tooth profile of the hub and sleeve that mesh with each other. Since 2006, for the purpose of experimenting, a new, improved clutch has been introduced on cars of the 81–717 (714) series and their modifications.ZK306-6 companiesKWD. The gear coupling consists of 2 identical coupling halves with the required flange mounting material. A hub (1) made integral with the ring gear (7) is pressed onto the TED shaft (9) and the small gear shaft (12) in a hot or cold state. A fitting washer (10) and a fixing nut (11) keep it from slipping off the shaft after pressing. The crown engages with a toothed sector applied on the inner surface of the sleeve (2). The sleeve has a detachable thrust ring (3) that limits the axial movement of the coupling and a corrugated metal bellows (8) that retains the lubricant. Each sleeve on the flange side is closed with a cover with a hole (5) and connected to the second coupling half using 8 fitting bolts (4).

Gear clutch run determined by the gap between the thrust rings ( 3 ) and toothed rims ( 7 ) of two coupling halves. For this design, the takeoff is defined10-12 mm , 5-6 mm for each coupling half.

Shell Omala HD 460 oil is used at 300 g for each coupling half.

Visual inspection (at each inspection, at the latest after 3 months): leaks, mechanical damage, external damage (impact points, etc.)

The period for changing the oil depends very much on the operating conditions of the coupling (load, speed, displacements, operating time). The thermal heating of the coupling in operation should not exceed 40°C from the ambient temperature.

Gear Coupling Operation

1. Engine drive hub with ring gear

2. Sleeve of the first coupling half

3. Fitting bolts

4. Sleeve of the second coupling half

5. Driven hub gear with gear rim

Gear Coupling Malfunctions:

- Hub rotation;

Couplings gear polyamide are intended for connection of coaxial horizontal shafts among themselves, for example, with angular reducers, simply reducers, electric motors, pumps. They consist of two coupling halves and one sleeve. Sleeves are available in polyamide, nylon, steel and stainless steel.

Looking for reliable parts for fastening shafts in equipment? Contact the World of Drive company. In this section of the catalog you can check prices, select and purchase gear couplings with a polyamide sleeve.

The presented couplings are used to fasten horizontal shafts with a single center of rotation, conventional and angular gearboxes, electric motors and pumps. The part consists of a coupling half and a sleeve, which is made of polyamide.

Product Features

We offer gear couplings from leading European manufacturers. Devices are available in various sizes and series. All presented gear couplings with polyamide sleeves:

• have high wear resistance;
• have excellent compensating abilities;
• adapted to work under heavy loads.

We keep gear couplings in stock so you can buy them today and receive them in one or more days (depending on your region). Sending is carried out to any settlements in Russia. You can learn more about prices and terms of transportation in the "Delivery" section of the website.

Contact our managers if you need additional advice on the range and conditions for the purchase of gear couplings with a polyamide connecting ring. To do this, submit a request through the website or contact our contact numbers.

Advantages

The gear coupling is able to compensate for any errors in the alignment of the shafts in a fairly large range.

Design

The gear coupling is a universal type of compensating couplings. Z and consists of 2 gears rigidly fixed on the shafts and a composite cylindrical drum. External involute teeth are cut on the gears, and internal involute teeth are cut on the cylindrical drum, into the cavities of which the teeth of external engagement enter. To give the outer and inner teeth equal strength, a correction is used. To increase the angle of displacement of the axes of the connected shafts, the outer teeth of the wheels are made spherical and barrel-shaped.

Production material

All parts are made of steel 40 or 45HX, 45L - forged, with a diameter of more than 150 mm - cast

Completeness of delivery

Table 1 : Gear Coupling Kit

When accepting the coupling, check the list of delivery according to the table below (the designation of parts is shown in Fig. 1)

Variants of execution and selection of gear coupling

The gear coupling is manufactured in the following types:

1 - with detachable clip;
2 - with an intermediate shaft;
3- with one-piece clip.

Coupling bushings are manufactured in the following versions:

1 - with cylindrical holes for the short ends of the shafts according to GOST 12080:
2-with tapered holes for short shaft ends according to GOST 12081 for couplings of types 1 and 3.

It is allowed to manufacture bushings with holes for the ends of shafts of a different shape at the request of the consumer.

Couplings ordered for operation at speeds equal to or greater than 50% of the value of the allowable frequency specified in Table 1 are marked with the letter C (the requirements of the paragraph are mandatory from 01.06.97). In couplings, a combination of bushings of various designs is allowed.

The designation of the couplings must include the type designation "MZ", the values ​​of the rated torque, the diameters of the mounting holes of the bushings or the holes of the bushings and flange half-couplings, the designation of the bushing version, climatic version and category according to GOST 15150, the designation of this standard. In the designation of the type 2 coupling, the diameter of the bore of the flange coupling half is placed after the designation of the diameter of the bore of the sleeve.

1, 2 - half-couplings with external teeth;

3, 4 - clips; 5 - bolts;

6 - hole for supplying lubricant

table 2: Selection of gear couplings according to the nominal parameters of the electric motor

Coupling symbol example

Type 1 with a rated torque of 4000 Nm, bores in bushings 50 mm. with bushings, version 1, climatic version U. category 2 MZ1I-4000-50-1U2 GOST R Zh95-96

Same. type 2, with a diameter of mounting holes in flanged floor couplings 55 mm: MZ 2-4000-50-55-1U2 GOST R 50895-96

Same. type 1, with bushings of execution 1 in one of which the bore diameter is 55 mm: MZ 1-4000-50-1-55-1U2 GOST R 50895-96

The same, one sleeve of version 1, the other of version 2 with a bore diameter of 55 mm: MZ 1-4000-50-1-55-2U2 GOST R 50895-96

Conditions of transportation and storage

Features of installation and operation

Application area

Couplings gear are applied in the majority in heavy mechanical engineering. They are put on turbines, on piston engines, on rolling mills. While couplings with elastic elements are suitable only for transmitting low and medium torques, the gear coupling is designed for transmitting high torques (up to 63,000 Nm).

It serves to connect and transfer rotation from the engine to another mechanism, from one shaft to another, and to constantly compensate for their radial, angular and axial displacements. If there is a single gear coupling, then it allows only angular displacement of the shafts. Two single couplings in combination allow and compensate not only for angular shaft misalignment, but also for radial misalignment. Due to the large number of teeth that transmit torque, gear couplings have a high load-bearing capacity and reliability. They have proven themselves at high speeds in various mechanisms.

Tooth coupling MZ

The gear coupling MZ consists of two coupling halves or bushings, which are rigidly mounted on the shafts, and a cage - a cylindrical compound drum. Outer teeth are cut on the bushings, and two rows of internal teeth are cut on the drum. For compensating ability and better mobility of the couplings, the surface of the outer teeth on the coupling halves is machined in a sphere, they are made barrel-shaped, which provides increased side clearance in engagement. The gear coupling MZ consists of two gear clips connected by bolts, and two gear bushings that are inserted into the clips. In this case, the teeth of the bushings and the teeth of the clips engage, and due to the spherical shape of the tooth of the bushings, a slight displacement in various directions is allowed. In such couplings, the misalignment of the bushing axis relative to the cage axis is no more than 1°30'.

All components of the coupling are made of steel: with shaft diameters ranging from 80 to 140 mm, — forged, and at large diameters — cast. Coupling teeth are subjected to heat treatment - for couplings with a high rotational speed (u tooth > 6 m/s) up to hardness HRC≥45÷50. For low-speed, low-speed couplings, lower hardness is allowed - up to HB≥ 300.

To increase extreme pressure resistance, mating teeth should have some hardness difference. The engagement works in oil (nigrol), as this increases the wear resistance of the teeth and reduces friction losses. Oil is poured into the drum up to the lowest point of the O-rings on the ends of the drum.

Options gear couplings

The parameters of gear couplings are standardized according to GOST 5006-55 for shaft diameters from 40 mm to 560 mm, and transmitted moments, from M cr = 70 kGm up to 100 000 kGm. For general purpose couplings, the maximum number of revolutions per minute is limited based on peripheral speed u tooth = 25 m/s, on the starting circle of the ring gear . According to GOST 5006-55, the permissible angle of misalignment of the shafts in the absence of displacement is a=1°. The allowable displacement in the absence of skew is equal to e≈0.02 d . If n If both types of deformations are present, then their allowable values ​​should be: a≤30′; e≥0.01 d .

The main parameter for determining the operability of gear couplings is the wear resistance of the working surfaces of the teeth, which depends on the circumferential speed and the linear and angular movements of the connected shafts. But since the values ​​of these movements change during operation, the geometric parameters of the engagement change, and, accordingly, the nature of the load distribution between the teeth.

In this regard, it is almost impossible to perform an absolutely accurate calculation. Therefore, in practice, the dimensions of gear couplings are chosen according to the moment M m = k p M cr (GOST 5006-55), where, depending on the responsibility of the connection, k p must be taken increased by 1.3-1.5 times.

In particular, in cranes, movable gear couplings are mainly used, which compensate for the displacement of the connected shafts. The most widespread, among the rigid movable couplings, are gear couplings, which are manufactured in accordance with GOST 50895-96, GOST 5006-83. Also, such couplings can be manufactured according to the customer's specifications.

There are the following design of gear couplings:

1. with a detachable clip (designation according to GOST 5006-55 - MZ);
2. with an intermediate shaft (designation according to GOST 5006-55 - MZP);
3. with non-removable collar.

Bushings of gear couplings are produced of such types:

• with cylindrical holes according to GOST 12080, for short shaft ends.
• with conical holes for couplings with split and one-piece cage, according to GOST 12081, for short shaft ends.

If you need bushings with holes of a different shape, then they are made by order of the consumer. A combination of bushings of different designs is also allowed in couplings.

Gear couplings made of caprolon, capron and other similar materials have proven themselves well. Thanks to the elastic polymer gears in the cage, the load distribution between the teeth is more evenly distributed, and the total transmitted load is almost as good as the load capacity of gear couplings with metal teeth. This is especially true at significant angles of skew. In addition, such polymer couplings have better damping capacity and electrical insulating properties. The price of a gear coupling made of polymeric materials compares favorably with the price of metal ones.

Coupling toothed MZP consists of a flange half-coupling, bushing, clip. It is produced in accordance with the requirements of GOST 5006-55 and serves to connect the shafts by means of an intermediate shaft.

Such couplings with an intermediate shaft, as well as chain couplings, can be called semi-rigid.