RU30172U1 - Locomotive axial plain bearing - Google Patents

Abstract

1. The locomotive motor-axial bearing, comprising liners mounted on an axle of a pair of wheels with steel housings with axial and radial bearing surfaces of antifriction material, with grooves on the inner surface of each liner, and contacting the outer surfaces of the liners with the backbone of the traction motor and power cover, characterized the fact that a radial support is mounted in the steel casing of the liner - a half-sleeve of antifriction material with grooves on the outer surface, the cavities of which are connected with grooves on the inner surface, and conical end surfaces, and the axial bearing - a half-disk of antifriction material with radial grooves on the end surface, a shoulder for axial fixing relative to the housing and a conical end surface in contact with the surface of the radial support, while the opposite conical surface is radial supports in contact with the thrust shoulder of the housing. 2. The locomotive motor-axial bearing according to claim 1, characterized in that grooves are made in the half-disk and the bearing flange of the housing, in which half rings of antifriction material are installed, spring-loaded by wavy expanders, for example, of tape.

Description

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MOTOR AXIAL BEARING SLIDING

LOCOMOTIVE

The utility model relates to the field of engineering, in particular, to the support nodes of the wheel-motor blocks of locomotives, and can be used in the design of sliding bearings with increased bearing capacity for combined loading of supports.

Known motor-axial bearings of locomotives, consisting of two split halves - liners. The design of both liners is a supporting body - a half-sleeve with a flange of antifriction material, for example, a brass body with a babbitt filling from 2 to 3 mm thick along the inner cylindrical surface of the liner (see, for example. Mechanical part of traction rolling stock: Textbook for high schools g. d. transport / I.V. Biryukov, A.N. Savoskin, G.P. Burchak, etc. Under the editorship of I.V. Biryukov. - M., 1992, S. 319-324). Bearing units are mounted on the axis of the wheelset, the core of the traction motor and power covers rest on the bearing shells. Such bearings have limited bearing capacity, under load and when the axis is skewed, the shape of the liners deviates from the cylindrical, while the specific load increases, which contributes to more

BORODIN ANATOLY VASILIEVICH TARUTA DMITRY VIKTOROVICH MKI F 16 C 17/20

rapid wear of work surfaces and a progressive increase in clearance in the joint.

A closer technical solution to the proposed device is the design of steel-babbit motor axial plain bearings for locomotives (see Bushe N.A., Frolov V.K. Steel-babbit motor axial bearings for main locomotives / M., Vestnik VNIIZhT, No. 4, 2000 G., S. 46-47). Motor-axial bearings contain bushings with steel housings and babbitt fillings on the end surface of the thrust flange and the cylindrical working surface. Grooves are made on the inner surface of the housing, which provide better running-in of the antifriction layer and are reservoirs for lubricating the bearing. Steel bearing housings provide more babbit refills. Having due to this better maintainability, steel casings, at the same time, worsen heat dissipation from the friction zone, because of this a thin antifriction layer is heated to higher temperatures, which reduces the bearing capacity of the liners. A less malleable steel shell of the liner leads to an increase in edge pressures during misalignment of the axis and, consequently, to more intensive wear of the working surfaces of the bearings.

The task to which the claimed utility model is directed is to increase the laying hens; to it the ability of the device and its durability.

The proposed device axial motor bearings of the locomotive contains liners with steel bodies with axial and radial bearing surfaces, grooves on the inner surface of each liner. Radial and axial bearings made of antifriction materials are mounted in the steel casing of the liner. Radial bearing - half sleeve with grooves on the outer surface and conical end surfaces. Axial support - a half-disk with radial grooves on the end surface, with a shoulder for axial fixing of the support relative to the liner body and a conical end surface. Conical Face

the surface of the radial bearings are in contact with the conical surfaces of the axial bearings and the supporting flange of the liner body. The cavity of the radial support is sealed by contact seals - half rings, spring-loaded wavy expanders installed in the grooves of the thrust flange of the housing and the half-disk of the axial support. Bearings are mounted on the axis of the wheelset, while the outer surfaces of the liners are in contact with the skeleton of the traction motor and the power cover.

The solution to the technical problem is illustrated by drawings: FIG. 1 is a longitudinal section through a bearing assembly of a wheel-motor unit; FIG. 2 is a longitudinal section through a liner of a sliding support.

Motor-axial plain bearing consists of upper 1 and lower 2 liners. Each insert contains a steel casing 3, in which a radial 4 and axial 5 bearings are mounted. Radial support 4 is a half-sleeve with radial grooves 6 on the outer surface, with longitudinal 7 and transverse 8 axis of the half-sleeve grooves on the inner surface. The grooves are interconnected by channels 9. The end surfaces of the half-sleeve are made conical. The axial support 5 is a half-disk with a persistent end surface 10 and a shoulder 11 with a conical end surface, radial grooves 12 on the sliding surface 13. The grooves 12 are connected by channels 14 to the cavity 15. In the channels of the half-disk and the stop shoulder 16 of the casing 3 are sized; half rings 17, which are spring-loaded with wavy expanders 18, for example, of steel tape.

The liner assembly is drained; they are carried out in the following sequence. A half-sleeve with an end conical surface is brought into contact with the surface of the thrust collar of the case, then radially mixed; by half-disk insertion, the collar 11 is inserted into the groove of the case, while the end conical surface of the collar 11 presses the outer surface of the half-sleeve to the surface of the case. The axial position of the half-disk is fixed by rolling the cylindrical belt 19 of the housing 3 on the outer conical surface

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half disk. Before installing the liners on the axis 20, the expanders 18 and half rings 17 are installed in the grooves of the shoulder 16 of the housing 3 and the half-disk 17. The lower liners 2 with the wheel axis 20 are placed on the bed of the skeleton 21 of the traction engine, then the upper liners 1 and the power covers 22 are installed.

When the locomotive moves, the motor-axial plain bearings absorb radial and axial loads. Radial loads perceive the cylindrical surfaces of the radial bearings 4, axial - end surfaces of the axial bearings 5 of the liners 1 and 2.

The proposed sliding bearing device contains a radial support in the form of a half-sleeve with a thickness of two to three times the thickness of the filling with babbits. This contributes to better heat dissipation from the friction surface. The sleeve can be made of a more wear-resistant material than babbits, for example, aluminum-iron bronze, than to increase the durability of the bearing. External radial grooves significantly reduce the bending stiffness of a half sleeve installed in a steel casing with a smaller thickness of the cylindrical part. This helps to reduce edge pressure, a more even distribution of forces on the surface of the half-sleeve, increase the bearing capacity of the liner. In addition, the cavities of the outer grooves are reservoirs for liquid lubricant, which, through the channels in the half-sleeve, enters the inner surface of the half-sleeve. The radial grooves 12 on the end surface 13 of the axial support and the cavity 15 also act as reservoirs for the lubricant. Semicircles of self-lubricating material, spring-loaded by expanders, provide axial locking of the lubricant, more uniform distribution of the oil layer over the sliding surface, and its longer retention. The device has maintainability properties, which is determined by the ability to replace half-sleeves and half-disks in each insert.

From the above it follows that the claimed utility model allows to increase the bearing capacity and durability of the motor-axial sliding bearing of the locomotive. Vice-rector for scientific work Cheremisin

Claims (2)

1. The locomotive motor-axial bearing, comprising liners mounted on an axle of a pair of wheels with steel housings with axial and radial bearing surfaces of antifriction material, with grooves on the inner surface of each liner, and contacting the outer surfaces of the liners with the backbone of the traction motor and power cover, characterized the fact that a radial support is mounted in the steel casing of the liner - a half-sleeve of antifriction material with grooves on the outer surface, the cavities of which are connected with grooves on the inner surface, and conical end surfaces, and the axial bearing - a half-disk of antifriction material with radial grooves on the end surface, a shoulder for axial fixing relative to the housing and a conical end surface in contact with the surface of the radial support, while the opposite conical surface is radial supports in contact with the thrust shoulder of the housing. 2. The locomotive motor-axial bearing according to claim 1, characterized in that grooves are made in the half-disk and the bearing flange of the housing, in which half rings of antifriction material are installed, spring-loaded by wavy expanders, for example, of tape.