CN111959549A

CN111959549A - Rail vehicle axle box rubber vibration damping pad with built-in dynamic vibration absorber

Info

Publication number: CN111959549A
Application number: CN202010629840.XA
Authority: CN
Inventors: 杜伟
Original assignee: Liaoning Railway Vocational and Technical College
Current assignee: Liaoning Railway Vocational and Technical College
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2020-11-20

Abstract

The utility model provides a rail vehicle axle box rubber vibration damping pad of built-in dynamic vibration absorber, belongs to spare part technical field for rail vehicle, including upper padding plate, lower bolster, block rubber, quality piece, the upper padding plate is the metal ring sheet metal, and its upper portion is equipped with vertical annular flange, the lower bolster is the metal ring sheet metal, be equipped with the block rubber of four separations in the ring region between upper padding plate, the lower bolster, be equipped with the quality piece in the central region that four block rubbers enclose. The vibration damping pad can reduce the vertical vibration energy of the axle box suspension device, reduce the high-frequency vertical vibration of four axle boxes of the same bogie, reduce the transverse vibration energy of the axle box suspension device, improve the transverse stability of a wheel pair, reduce the transverse dynamic load of a wheel rail and reduce the abrasion.

Description

Rail vehicle axle box rubber vibration damping pad with built-in dynamic vibration absorber

Technical Field

The invention belongs to the technical field of parts for railway vehicles, and particularly relates to a rubber vibration damping pad of a railway vehicle axle box with a built-in dynamic vibration absorber.

Background

At present, a two-axle bogie is mainly used for rail transit vehicles, passenger vehicles need to meet higher comfort requirements, and the bogie of the rail transit vehicle adopts a framework type two-system suspension structure, namely a first-system suspension (or axle box suspension) device arranged between a wheel pair and the end part of a side beam of a framework and a second-system suspension device arranged between the framework and a sleeper beam or a vehicle body. The suspension device plays a role in damping and buffering, and determines the running stability and safety of the vehicle.

During operation, dynamic load generated between the wheel rails is transmitted to the vehicle body through the primary suspension, the framework and the secondary suspension. Therefore, the closer the parts are to the contact point of the wheel and rail, the shorter the load transmission path, and especially the parts (such as wheel set, axle box and bearing device) under a series of suspension devices, also called unsprung mass, are subjected to vibration impact load which is significantly larger than the parts on the series of suspension devices. The failure rate of each part under the spring is obviously higher than that of other parts.

Modern rail vehicles are continuously developed towards high speed and heavy load, vibration load increased along with the increase of speed must be solved in vehicle design, more complex suspension systems or active/semi-active control technologies are mostly adopted, the structural complexity is increased, and the problems of stability and reliability of control systems exist. Particularly for high-speed vehicles, although the manufacturing quality of parts is continuously improved, the normal/abnormal load of a wheel axle is remarkably increased, and the hard-to-avoid fatigue failure of parts not only shortens the service life of the parts, but also is more likely to endanger the driving safety. As shown in fig. 1, in the conventional swing-arm type axle box positioning and primary suspension device, continuous exchange of vibration energy and elastic potential energy is realized by means of a steel spring, vibration energy is continuously consumed by two damping members, namely a hydraulic damper and an axle box rubber pad, but the damper is unloaded during high-frequency vibration, and vibration is difficult to effectively suppress by only using a traditional rubber pad. When a vehicle cannot maintain a good wheel-rail contact state or reasonable bogie parameter configuration, wheel-rail load is increased abnormally, vibration energy of the whole axle box positioning and primary suspension system is increased, and faults such as fatigue fracture of a steel spring, oil leakage of a shock absorber, loosening/losing of bolts of a box cover of a swing arm axle box and the like are easily induced. In addition, the high-frequency dynamic loads generated by four axle boxes in one bogie have mutually inconsistent phase lags, so that the high-frequency torsional vibration cracking of the framework can be caused; and after the primary suspension part is failed, the vibration transmission rate of the framework is increased, and the loads of all parts of the secondary suspension are increased, even the stability and the safety of the vehicle body are influenced.

Disclosure of Invention

In order to solve the technical problems, the invention provides a rubber vibration damping pad of an axle box of a railway vehicle with a built-in dynamic vibration absorber, which reduces the vertical vibration energy of an axle box suspension device and reduces the vibration fatigue failure faults of parts such as a steel spring, a primary vertical vibration absorber, an axle box bolt and the like; the high-frequency vertical vibration of four axle boxes of the same bogie is reduced, the torsional vibration of the frame is improved, and the fatigue reliability of the frame is improved; the lateral vibration energy of the axle box suspension device is reduced, the lateral stability of the wheel set is improved, the lateral dynamic load of the wheel rail is reduced, and the abrasion is reduced.

The invention adopts the following technical scheme:

the utility model provides a rail vehicle axle box rubber vibration damping pad of built-in dynamic vibration absorber, includes upper padding plate, lower bolster, block rubber, quality piece, the upper padding plate is the metal ring sheet metal, and its upper portion is equipped with vertical annular flange, the lower bolster is the metal ring sheet metal, be equipped with four separated block rubbers in the ring region between upper padding plate, the lower bolster, be equipped with the quality piece in the central region that four block rubbers enclose.

Further, the rubber block is a section of arc in the annular area between the upper cushion plate and the lower cushion plate.

Further, the height of the upper surface and the lower surface of the mass block is lower than that of the upper surface and the lower surface of the rubber block.

Furthermore, the radian between the upper surface and the lower surface of the mass block and the upper surface and the lower surface of the rubber block is excessive.

Furthermore, the rubber block is connected with the upper backing plate, the lower backing plate and the mass block through vulcanization.

Furthermore, the four rubber blocks are distributed in the annular area between the upper cushion plate and the lower cushion plate at equal intervals.

The invention has the advantages and effects that:

1. the dynamic vibration absorption mass block vulcanized in the middle of the rubber vibration absorption pad of the axle box is utilized to slow down the vertical and transverse vibration of axle box positioning and primary suspension, improve the fatigue reliability of other suspension parts and improve the transverse stability of the wheel pair.

2. The high-frequency vibration of the axle boxes at the four corners of the framework, which are not consistent with each other, is improved, and the torsion fatigue resistance of the framework is improved.

3. The appearance size of the rubber pad of the axle box is not changed, the installation requirement of the existing axle box positioning device can be met, and the new construction/reconstruction cost is low.

Drawings

FIG. 1 is a schematic view of an overall assembly structure of a bogie;

FIG. 2 is a schematic diagram of an axle box suspension configuration;

FIG. 3 is a schematic view of a conventional axle box rubber damping pad;

FIG. 4 is a schematic view of the structure of the axle box rubber damping pad of the present invention;

FIG. 5 is a partial cross-sectional view with the upper backing plate removed;

FIG. 6 is a schematic view of the structure of the upper plate according to the present invention;

FIG. 7 is a schematic view of a lower pad structure according to the present invention;

FIG. 8 is a schematic structural view of a single rubber block of the present invention;

FIG. 9 is a schematic view of a mass according to the present invention;

figure 10 is a partial cross-sectional view of the pedestal rubber damping pad of the present invention.

The components in the figure: 1 is an upper backing plate, 2 is a lower backing plate, 3 is a flange, 4 is a first rubber block, 5 is a second rubber block, 6 is a third rubber block, 7 is a fourth rubber block, 8 is a mass block, 9 is a steel spring, 10 is an axle box rubber pad, 11 is a rotating arm body, 12 is a rotating arm node, 13 is a primary vertical shock absorber, and 14 is shock-absorbing rubber.

Detailed Description

The invention is further explained below with reference to the figures and the examples.

The upper and lower metal backing plates are in a circular ring plane metal sheet structure, and the lower backing plate is in a metal circular ring sheet structure and is in contact with the top plane of the rotating arm shaft box during installation; the upper backing plate is a metal ring sheet and annular spring retaining structure, an upper plane is in plane contact with a steel spring support ring used by combining the inner ring and the outer ring of the axle box during installation, and the spring retaining structure is used for limiting the positions of the inner ring spring and the outer ring spring to avoid collision. A rubber body is vulcanized between the upper backing plate and the lower backing plate, and a metal mass block is vulcanized and installed in the middle of the integral/split rubber body to serve as a dynamic vibration absorber. A certain space is reserved between the mass block and the upper and lower cushion plates in the vertical direction, so that the mass block is not contacted with the upper and lower cushion plates during vibration; the mass block is connected with the rubber block in a horizontal direction in a vulcanization mode to form a whole, the sectional area of the joint of the rubber block and the mass block is gradually reduced, the joint face of the rubber block and the mass block is gradually changed into the height of the mass block from the upper backing plate to the lower backing plate, the upper surface and the lower surface of the mass block and the upper surface and the lower surface of the rubber block are transited through radians, and the sectional area height of the side face of the rubber block is gradually transited to the height of the mass block from the original height between the upper backing. When the axle box of the wheel set vibrates in high frequency, the mass block plays a dynamic vibration absorption role, absorbs vertical and transverse vibration energy, improves fatigue reliability of hanging parts of the axle box, and improves transverse stability of the wheel set. The four rubber blocks are evenly distributed and are respectively connected with the upper backing plate and the lower backing plate in a vulcanization mode, and then the middle circular arc surface is connected with the mass block in a vulcanization mode.

Claims

1. The utility model provides a rail vehicle axle box rubber damping pad of built-in dynamic vibration absorber which characterized in that: including upper padding plate (1), lower bolster (2), block rubber, quality piece (8), upper padding plate (1) is the metal ring sheet metal, and its upper portion is equipped with vertical annular flange (3), lower bolster (2) are the metal ring sheet metal, be equipped with the block rubber of four separations in the ring region between upper padding plate (1), lower bolster (2), be equipped with quality piece (8) in the center region that four block rubber enclose.

2. The rubber vibration pad for an axle box of a railway vehicle with a built-in dynamic vibration absorber of claim 1, wherein: the rubber block is a section of arc in the annular area between the upper backing plate (1) and the lower backing plate (2).

3. The rubber vibration pad for an axle box of a railway vehicle with a built-in dynamic vibration absorber of claim 1, wherein: the height of the upper surface and the lower surface of the mass block (8) is lower than that of the upper surface and the lower surface of the rubber block.

4. The rubber vibration pad for an axle box of a railway vehicle with a built-in dynamic vibration absorber of claim 3, wherein: the upper surface and the lower surface of the mass block (8) and the upper surface and the lower surface of the rubber block are transited through radian.

5. The rubber vibration pad for an axle box of a railway vehicle with a built-in dynamic vibration absorber of claim 1, wherein: the rubber block is connected with the upper backing plate (1), the lower backing plate (2) and the mass block (8) through vulcanization.

6. The rubber vibration pad for an axle box of a railway vehicle with a built-in dynamic vibration absorber of claim 1, wherein: the four rubber blocks are distributed in the annular area between the upper backing plate (1) and the lower backing plate (2) at equal intervals.