WO2020143251A1

WO2020143251A1 - Sealing apparatus used for variable gauge wheelset, and variable gauge wheelset

Info

Publication number: WO2020143251A1
Application number: PCT/CN2019/108096
Authority: WO
Inventors: 魏家麒; 于祥; 杨欣; 陈硕; 王旭
Original assignee: 中车青岛四方机车车辆股份有限公司
Priority date: 2019-01-07
Filing date: 2019-09-26
Publication date: 2020-07-16
Also published as: EP3909829A4; ES2958919T3; PL3909829T3; RU2759204C1; CN109733434B; JP7066259B2; EP3909829B1; EP3909829A1; CN109733434A; JP2022508782A

Abstract

Provided are a sealing apparatus used for a variable gauge wheelset, and a variable gauge wheelset; the sealing apparatus is used between a sliding mechanism (3) disposed on the variable gauge wheelset and an axle-box rear cover (2) of an axle box body (1); said sliding mechanism (3) can move axially relative to the axle box body (1) and can rotate relative to the axle box body (1); the sealing apparatus comprises a sliding sealing member and a rotating sealing member; the sliding sealing member comprises a sliding ring (4) sleeved outside the sliding mechanism (3) and sealingly connected to the rear cover (2) of the axle box; the inner wall of the sliding ring (4) is provided with a through-groove (41) in the axial direction; the outer wall of the sliding mechanism (3) is axially provided with a protruding part which slidingly fits with said through-groove (41); the rotating seal comprises a sealing retaining plate (5) fixed on the outside of the rear cover (2) of the axle box; the outer wall of the sliding ring (4) is circumferentially provided with an annular groove (42); the lower end of the sealing retaining plate (5) extends into said annular groove (42). The described sealing apparatus can seal between the sliding mechanism (3) and the axle housing (1), improving the sealed environment and enhancing sealing performance.

Description

Sealing device for variable gauge wheelset and variable gauge wheelset

Cross-reference of related applications

This application requires the priority of the Chinese patent application filed on January 7, 2019 with the application number 201910012719.X and the invention titled "Sealing Device for Variable Gauge Wheelsets and Variable Gauge Wheelsets", which passed All references are incorporated into this disclosure.

Technical field

The present disclosure relates to the technical field of variable gauge of rail vehicles, in particular to a sealing device for a variable gauge wheelset and a variable gauge wheelset.

Background technique

With the rapid development of global economic integration, cross-border passenger and freight transportation has grown rapidly in recent years. However, due to the different gauges of railways in various countries, it has caused serious obstacles to cross-border railway transportation. In order to solve the problem that the different rail gauges of various countries hinder the cross-border railway transportation, variable gauge wheelsets are proposed, that is, when the train travels to the railways of other countries, by changing the The distance between them is adapted to the gauge of other countries' railways.

During the track change, the sliding mechanism on the wheelset will slide relative to the axle box body with the pushing of the ground guide rail. The traditional sealing structure cannot be applied to the track gauge wheelset. How to adjust the sliding mechanism to the axle box body Sealing is an urgent problem to be solved.

Summary of the invention

(1) Technical problems to be solved

The present disclosure aims to solve at least one of the technical problems existing in the prior art or related technologies.

The purpose of the present disclosure is to provide a sealing device for a gauge-changing wheelset to seal between the sliding mechanism and the axle box body, improve the sealing environment, and improve the sealing effect.

(2) Technical solution

In order to solve the above technical problems, the embodiments of the present disclosure provide a sealing device for a variable gauge wheelset, the sealing device is used for a sliding mechanism provided on the variable gauge wheelset and an axle box rear cover of an axle box body Between, the sliding mechanism can move axially relative to the axle box body, and can rotate relative to the axle box body, the sealing device includes a sliding seal and a rotating seal, the sliding seal includes A sliding ring sleeved outside the sliding mechanism and sealingly connected to the rear cover of the axle box, an inner wall of the sliding ring is axially provided with a through groove, and an outer wall of the sliding mechanism is axially provided with The convex part of the through groove sliding fit; the rotating seal includes a sealing baffle fixed on the outer side of the rear cover of the axle box, an outer wall of the sliding ring is circumferentially provided with an annular groove, and the lower end of the sealing baffle extends into In the annular groove.

The embodiment of the present disclosure further includes a first seal ring, the rear cover of the axle box is provided with an axial through hole, and the rear cover of the axle box is provided with a first mounting groove on the inner periphery of the axial through hole, The outer circumference of the first seal ring is installed in the first installation groove with interference, and the inner circumference of the first seal ring is pressed against the outer circumference of the sliding ring.

In an embodiment of the present disclosure, a positioning groove is axially provided on the outer wall of the sliding mechanism, and a positioning key protruding from the positioning groove is placed in the positioning groove to form the convex portion.

In an embodiment of the present disclosure, the inner wall of the sliding ring is circumferentially provided with a plurality of the through grooves, and the outer wall of the sliding mechanism is circumferentially provided with the convex portions corresponding one-to-one with the through grooves.

In an embodiment of the present disclosure, the inner wall of the sliding ring is circumferentially provided with two through-grooves, and the two through-grooves are provided on two radial sides of the inner wall of the sliding ring.

In an embodiment of the present disclosure, the sealing baffle includes a first baffle and a second baffle that are docked to form an annular shape, and the inner circumference after the first baffle and the second baffle are located in the annular shape of the sliding ring In the slot.

In the embodiment of the present disclosure, the cross sections of the first baffle and the second baffle are both L-shaped, and the short sides of the L-shaped are fastened on the outer periphery of the rear cover of the axle box by fasteners, the The long side of the L-shape is set close to the outer side of the rear cover of the axle box.

In an embodiment of the present disclosure, a second sealing ring is provided between the sliding ring and the sliding mechanism, and the second sealing ring is fixedly sleeved in a second mounting groove on the outer periphery of the sliding mechanism.

An embodiment of the present disclosure also provides a variable gauge wheelset, including a slip mechanism, an axle box body, and the above-mentioned sealing device for the variable gauge wheelset. The sealing device is provided on the sliding mechanism and Between the rear cover of the axle box of the axle box body is used for the axial sliding seal and the rotary seal of the sliding mechanism.

The embodiment of the present disclosure further includes wheels and axles, the wheels are slidably provided at both ends of the axle, the slip mechanisms are respectively connected to the wheels, and the axles located at both ends of the axle In the box, the wheels are unlocked and locked by the sliding mechanism, the sliding mechanism includes an inner sleeve, the inner sleeve is sleeved on the axle and cooperates with the axle gap, the The sealing device is provided between the inner sleeve and the axle box rear cover of the axle box body.

(3) Beneficial effects

Compared with the prior art, the present disclosure has the following advantages:

An embodiment of the present disclosure provides a sealing device for a variable gauge wheelset. The sealing device is provided between a sliding mechanism of the variable gauge wheelset and an axle box rear cover of the axle box body. The sealing device The sliding seal includes a sliding seal and a rotating seal. The sliding seal includes a sliding ring sleeved outside the sliding mechanism and sealingly connected to the rear cover of the axle box. The inner wall of the sliding ring is axially provided Through slot, the outer wall of the sliding mechanism is axially provided with a convex portion that slidingly cooperates with the through slot, when the sliding mechanism moves, the convex portion moves along the through slot, thereby ensuring that the sliding ring and the sliding mechanism can rotate together , And the two can slide relative to each other in the axial direction; the rotating seal includes a sealing baffle fixed on the outer side of the rear cover of the axle box, the outer wall of the sliding ring is circumferentially provided with an annular groove, and the lower end of the sealing baffle extends Into the annular groove to provide axial positioning for the sliding ring, so that the sliding ring does not move axially, so that the sliding ring can only rotate circumferentially relative to the rear cover of the axle box, and can only axially slide relative to the sliding mechanism; The sealing device decouples the double-degree-of-freedom seal into a two-level single-degree-of-freedom seal, and each layer of seal is only for relative translation or relative rotation, thereby improving the sealing environment, improving the sealing effect, and also conducive to the seal under a single influencing factor Optimization, and finally achieve the sealing of the compound degree of freedom structure.

BRIEF DESCRIPTION

1 is an axial cross-sectional view of a sealing device for a gauge-changing wheelset according to an embodiment of the present disclosure;

FIG. 2 is a partial enlarged view of A in FIG. 1;

3 is a front view of a sliding ring in a sealing device for a gauge-changing wheelset according to an embodiment of the present disclosure;

4 is a cross-sectional view of A-A in FIG. 3;

In the picture: 1: axle box body; 2: axle box back cover; 3: sliding mechanism; 31: inner sleeve; 32: rolling bearing; 33; outer sleeve; 34: positioning key; 4: sliding ring; 41: Through groove; 42: annular groove; 5: sealing baffle; 6: first sealing ring; 7: second sealing ring; 8: axle.

detailed description

The specific implementation of the present disclosure will be further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present disclosure, but not to limit the scope of the present disclosure.

In the description of the present disclosure, it should be noted that the terms "center", "portrait", "landscape", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, etc. is based on the orientation or positional relationship shown in the drawings, just for the convenience of describing the present disclosure and simplifying The description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as limiting the present disclosure. In addition, the terms "first", "second", "third", etc. are for descriptive purposes only and cannot be understood as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or connected integrally; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure may be understood as appropriate.

In addition, in the description of the present disclosure, unless otherwise stated, the meanings of "plurality", "multiple roots", and "multiple groups" are two or more.

As shown in FIGS. 1-4, an embodiment of the present disclosure provides a sealing device for a variable gauge wheelset. The variable gauge wheelset includes a slip mechanism 3 and an axle box body 1, and the slip mechanism 3 may be opposite To move back and forth in the axial direction of the axle box body 1 to meet the requirements of variable gauge, in order to ensure the basic sealing requirements of the axle box body 1, the axle box body 1 has an axle box front cover at one end and an axle box rear cover at the other end 2. The slip mechanism 3 is located in the axle box body 1 and is connected to the wheel through the axle box rear cover 2. During the normal operation of the gauge-changing wheelset, the slip mechanism 3 rotates with the wheel and the axle box body 1 is relatively fixed , So that the sliding mechanism 3 can rotate relative to the axle box 1, that is to say, the sliding mechanism 3 has rotational freedom and translational freedom along the axis box 1. The sealing device is used to provide Between the sliding mechanism 3 of the variable gauge wheelset and the axle box rear cover 2 of the axle box body 1; specifically, the sealing device includes a sliding seal and a rotating seal, and the sliding seal includes a sleeve A sliding ring 4 outside the sliding mechanism 3 and sealingly connected to the rear cover 2 of the axle box, as shown in FIG. 3, an inner wall of the sliding ring 4 is provided with a through groove 41 in the axial direction, and the sliding mechanism The outer wall of the 3 is axially provided with a convex portion that slidingly cooperates with the through slot 41. When the sliding mechanism 3 moves, the convex portion moves along the through slot 41, thereby ensuring that the sliding ring 4 and the sliding mechanism 3 can rotate together, and The two can slide relative to each other in the axial direction; the rotating seal includes a sealing baffle 5 fixed on the outer side of the rear cover 2 of the axle box. As shown in FIG. 4, the outer wall of the sliding ring 4 is circumferentially provided with an annular groove 42, The lower end of the sealing baffle 5 extends into the annular groove 42 to provide axial positioning for the sliding ring 4 so that the sliding ring 4 does not move axially, so that the sliding ring 4 can only circumferentially occur with respect to the rear cover 2 of the axle box Rotation, relative to the sliding mechanism 3, can only axially slide. The present disclosure improves the sealing environment by decoupling the double-degree-of-freedom seal into a two-level single-degree-of-freedom seal, each layer of seal is only for relative translation or relative rotation, Improving the sealing effect is also conducive to the optimization of seals under a single influencing factor, and finally achieves the sealing of the compound degree of freedom structure.

In the embodiment of the present disclosure, as shown in FIG. 1, in order to achieve a sealed connection between the axle box rear cover 2 and the sliding ring 4, it further includes a first seal ring 6. The first seal ring 6 may be a rubber seal ring. The axle box rear cover 2 is provided with an axial through hole, and the axle box rear cover 2 is provided with a first mounting groove on the inner periphery of the axial through hole, the first mounting groove is in a ring shape, and the first sealing ring The outer circumference of 6 is installed in the first mounting groove with interference, the inner circumference of the first sealing ring 6 is pressed against the outer circumference of the sliding ring 4, when the sliding ring 4 rotates, the outer circumference of the sliding ring 4 and the first A sealing ring 6 can be rotatably sealed.

In the embodiment of the present disclosure, in order to facilitate the formation of the convex portion, the outer wall of the sliding mechanism 3 is provided with a positioning groove in the axial direction. A positioning key 34 protruding from the positioning groove is placed in the positioning groove. The length of the positioning key matches the length of the positioning groove, the thickness of the positioning key 34 is greater than the depth of the positioning groove, so that after the positioning key 34 is installed in the positioning groove, the upper surface of the positioning key 34 is higher than the positioning groove to form the convex portion, The convex portion enables the sliding ring 4 to rotate together with the sliding mechanism 3, and the convex portion does not restrict the axial movement of the sliding mechanism 3.

In the embodiment of the present disclosure, the inner wall of the sliding ring 4 may be provided with a through groove 41 in the circumferential direction, but in order to ensure the balanced force of the sliding ring 4, the inner wall of the sliding ring 4 is preferably provided with a plurality of through grooves in the circumferential direction 41. A plurality of through grooves 41 may be uniformly distributed in the circumferential direction of the inner wall of the sliding ring 4. The outer wall of the sliding mechanism 3 is provided with the convex portions corresponding to the through grooves 41 in a circumferential direction.

In the embodiment of the present disclosure, for simplicity of the structure, the inner wall of the sliding ring 4 is circumferentially provided with two through grooves 41, and the two through grooves 41 are arranged on both sides in the radial direction of the inner wall of the sliding ring 4.

In the embodiment of the present disclosure, in order to cooperate with the annular groove 42 outside the sliding ring 4, the circumferential direction of the annular groove 42 is fully sealed. The sealing baffle 5 includes a first baffle and a second baffle that are butted to form a ring. The sealing baffle 5 is divided into a first baffle and a second baffle to facilitate installation from up and down directions. The inner periphery of the butt joint of the first baffle and the second baffle is located in the annular groove of the sliding ring 4 In 42, when the slide ring 4 rotates, the inner circumferences of the first and second baffles are sealed with the annular groove 42 in rotation.

In the embodiments of the present disclosure, specifically, the cross-sections of the first baffle and the second baffle are specifically L-shaped in radial cross-section, and the short sides of the L-shaped are fastened to the On the outer periphery of the axle box rear cover 2, the long side of the L-shape is disposed close to the outer side of the axle box rear cover 2 and extends into the annular groove 42.

In the embodiment of the present disclosure, there is a narrow and narrow gap between the sliding ring 4 and the sliding mechanism 3, which itself has a labyrinth effect. As shown in FIG. 2, the sliding ring 4 and the sliding mechanism 3 are provided with A second sealing ring 7, such as a rubber O-ring, is fixedly sleeved in the second mounting groove on the outer periphery of the sliding mechanism 3, and when the sliding ring 4 moves, the inner periphery of the sliding ring 4 It is in sealing contact with the second sealing ring 7 to further improve the sealing effect.

An embodiment of the present disclosure also provides a gauge-changing wheelset, including a sliding mechanism 3, an axle box body 1 and the above-mentioned sealing device for a gauge-changing wheelset, the sealing device is provided on the slippage The mechanism 3 and the axle box rear cover 2 of the axle box body 1 are used for the axial sliding seal and the rotary seal of the sliding mechanism 3. The present disclosure decomposes the degrees of freedom for each single degree of freedom Sealing separately reduces the difficulty of sealing, and ensures the high-speed running performance of variable gauge wheelsets while ensuring the sealing performance of multi-degree-of-freedom movements.

In the embodiment of the present disclosure, as shown in FIG. 1, the wheel and the axle 8 are further included. The wheel is slidably provided at both ends of the axle 8. Specifically, the inner circumference of the wheel is provided with an internal spline. The two ends of the axle 8 are respectively provided with external splines. The wheels and the two ends of the axle 8 are connected by the internal splines and the external splines, which is not only convenient for transmitting torque, but also convenient for the wheels to move. The sliding mechanism 3 is respectively The wheels are connected and located in the axle box 1 at both ends of the axle 8, the wheels are unlocked and locked by the sliding mechanism 3, the sliding mechanism 3 includes an inner sleeve 31, the The inner sleeve 31 is sleeved on the axle 8 and is in clearance fit with the axle 8. The sealing device is provided between the inner sleeve 31 and the axle box rear cover 2 of the axle box body 1, thereby, The convex portion is provided outside the inner sleeve 31, and the positioning groove is provided on the inner sleeve 31; the inner sleeve 31 extends out of the axle box 1 toward one end of the wheel and is fastened to the wheel by fasteners Fixed connection, there is a gauge changing space between the extended end of the inner sleeve 31 and the axle 8 to ensure that the inner sleeve 31 has a sufficient distance to move along the axle 8 when changing the gauge, without It will interfere with the axle 8; the sliding mechanism 3 further includes a rolling bearing 32 and an outer sleeve 33. The inner sleeve 31, the rolling bearing 32 and the outer sleeve 33 are closely sleeved sequentially from inside to outside. When the wheel rotates, The inner sleeve 31 and the inner ring of the rolling bearing 32 rotate together with the wheel. The outer sleeve 33 and the outer ring of the rolling bearing 32 remain relatively fixed. The outer sleeve 33 and the inner surface of the axle housing 1 are in clearance fit to facilitate the outer The sleeve 33, the inner sleeve 31, and the rolling bearing 32 move along the axle housing 1 as a whole. By providing a sealing device between the inner sleeve 31 and the axle box rear cover 2 of the axle box body 1, a good seal can be achieved when the inner sleeve 31 moves or rotates, and each layer of seal is only for relative translation or relative rotation. Thereby improving the sealing environment and the sealing effect.

As can be seen from the above embodiments, the present disclosure reduces the difficulty of sealing by decomposing the degrees of freedom and sealing each single degree of freedom separately, and guarantees the variable gauge wheels while ensuring the sealing performance of multi-degree of freedom movement High-speed performance.

The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the present disclosure. Within the scope of protection.

Claims

A sealing device for a variable gauge wheelset is characterized in that the sealing device is used between a sliding mechanism of the variable gauge wheelset and the axle box rear cover of the axle box body. The mechanism can move axially with respect to the axle box body and can rotate with respect to the axle box body. The sealing device includes a sliding seal and a rotating seal. The sliding seal includes A sliding ring outside the sliding mechanism and sealingly connected to the rear cover of the axle box, an inner wall of the sliding ring is axially provided with a through slot, and an outer wall of the sliding mechanism is axially provided with a sliding fit with the through slot The convex portion; the rotary seal includes a sealing baffle fixed on the outer side of the rear cover of the axle box, an outer wall of the sliding ring is circumferentially provided with an annular groove, and a lower end of the sealing baffle extends into the annular groove.
The sealing device for a gauge-changing wheelset according to claim 1, further comprising a first seal ring, the axle box rear cover is provided with an axial through hole, and the axle box rear cover is located at A first mounting groove is provided on the inner circumference of the axial through hole, the outer circumference of the first seal ring is installed in the first installation groove with interference, and the inner circumference of the first seal ring is pressed against the slide The outer circumference of the ring.
The sealing device for a gauge-changing wheelset according to claim 1, wherein the outer wall of the sliding mechanism is provided with a positioning groove in the axial direction, and the positioning groove protrudes from the positioning groove The positioning key forms the convex portion.
The sealing device for a variable gauge wheelset according to claim 1, wherein a plurality of the through grooves are circumferentially provided on the inner wall of the sliding ring, and the The convex portions correspond to the grooves one by one.
The sealing device for a gauge-changing wheelset according to claim 4, wherein the inner wall of the sliding ring is provided with two of the through grooves in the circumferential direction, and the two through grooves are provided on the sliding ring Radial sides of the inner wall.
The sealing device for a variable gauge wheelset according to claim 1, wherein the sealing baffle includes a first baffle and a second baffle that are butted to form an annular shape, the first baffle and the second baffle The inner periphery of the two baffles after docking is located in the annular groove of the sliding ring.
The sealing device for a variable gauge wheelset according to claim 6, wherein the cross sections of the first baffle and the second baffle are both L-shaped, and the short sides of the L-shaped baffle are fastened by The piece is fastened on the outer periphery of the rear cover of the axle box, and the long side of the L-shape is arranged close to the outer side of the rear cover of the axle box.
The sealing device for a variable gauge wheelset according to claim 1, wherein a second sealing ring is provided between the sliding ring and the sliding mechanism, and the second sealing ring is fixedly sleeved In the second mounting groove on the outer periphery of the sliding mechanism.
A gauge-changing wheelset, characterized by comprising a sliding mechanism, an axle box body, and a sealing device for a gauge-changing wheelset according to any one of claims 1-8, the sealing device being provided at The sliding mechanism and the axle box rear cover of the axle box body are used for the axial sliding seal and rotary seal of the sliding mechanism.
The variable gauge wheelset according to claim 9, further comprising a wheel and an axle, the wheel is slidably provided at both ends of the axle, and the sliding mechanisms are respectively connected to the wheels, And in the axle box bodies at both ends of the axle, the wheels are unlocked and locked by the slip mechanism, the slip mechanism includes an inner sleeve, and the inner sleeve is sleeved on the axle The upper is in clearance fit with the axle, and the sealing device is provided between the inner sleeve and the axle box rear cover of the axle box body.