CN113942535B

CN113942535B - Device for inhibiting torsional mode vibration of railway vehicle body

Info

Publication number: CN113942535B
Application number: CN202111362185.7A
Authority: CN
Inventors: 宫岛; 刘广宇; 周劲松; 任利惠; 赵阔; 沈有红; 李洪威; 李坤; 王泽根; 张俊泽
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2023-03-31
Anticipated expiration: 2041-11-17
Also published as: CN113942535A

Abstract

The invention relates to a device for suppressing torsional mode vibrations of a rail vehicle body, comprising: a support structure: the device comprises a base fixed on the roof through a second bolt and three struts fixed on the base through third bolts along the semi-arc circumferential direction; a guide structure: the universal joint comprises semicircular slide rails fixed at the tops of the three support columns through fourth bolts, a guide block sliding in the slide rails and an upper universal joint connected with the guide block; the vibration absorption structure comprises: the sliding rail device comprises a connecting rod, an inertia mass block sleeved on the connecting rod and rubber springs arranged on two sides of a guide block in the sliding rail, wherein the upper end of the connecting rod is movably connected with the guide block through an upper bearing and an upper universal joint, and the lower end of the connecting rod is movably connected with a base through a lower bearing and a lower universal joint. Compared with the prior art, the invention can effectively inhibit the torsional mode vibration of the railway vehicle body, improves the running stability and riding comfort of the vehicle and has obvious effect.

Description

Device for inhibiting torsional mode vibration of railway vehicle body

Technical Field

The invention relates to the technical field of vibration reduction of rail transit equipment, in particular to a device for inhibiting torsional mode vibration of a rail vehicle body.

Background

In recent years, along with the rapid development of national economy and the rapid enhancement of comprehensive national power, china establishes an ambitious goal of constructing a strong traffic country and steadily moves towards the ambitious goal, and the rail traffic construction attracts attention in the process of traffic network construction. The rail transit plays a great role in promoting contact of various regions, assisting economic development and the like, has become an important embodiment of national comprehensive national force, and meanwhile, people gradually become more dependent on a travel mode of the rail transit.

However, even though the rail transit construction in China has achieved remarkable results, various vibration problems of vehicles are caused by factors such as the continuous improvement of the operating speed of rail vehicles such as high-speed railways and intercity railways, the increase of the operating mileage, the poor vehicle operating environment, the light weight of vehicle bodies and the like. It is worth mentioning that, in order to achieve the purposes of energy conservation, environmental protection and the like, the vehicle body of the rail vehicle is continuously lightened during production and manufacturing, and the method reduces energy consumption and saves raw materials, and simultaneously, the structural rigidity of the vehicle body is reduced, so that the elastic modal vibration of the vehicle body is further aggravated. The torsional mode of the vehicle body is one of typical elastic modes of the vehicle body, the torsional mode frequency of the vehicle body is usually between 5 Hz and 20Hz, the torsional mode frequency has important influence on transverse and vertical vibration of the vehicle body, and particularly when the vehicle body is excited to have the frequency close to the modal frequency, the resonance phenomenon can occur, so that the vibration of the vehicle body is greatly increased. Moreover, the torsional mode frequency of 5-20 Hz has a bad influence on the running stability, and in addition, the overlapping of the modal vibration frequency range and the human body sensitive frequency range can seriously influence the riding experience of passengers.

Therefore, it is important to suppress torsional mode vibration of a vehicle body of a railway vehicle to improve vehicle running stability and riding comfort, and a device capable of effectively suppressing torsional mode vibration of the vehicle body is required.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a device for inhibiting the torsional mode vibration of a railway vehicle body.

The purpose of the invention can be realized by the following technical scheme:

an apparatus for damping torsional mode vibrations of a rail vehicle body, the apparatus comprising:

a support structure: the device comprises a base fixed on the roof through a second bolt and three struts fixed on the base through third bolts along the semi-circular circumferential direction;

a guide structure: the universal joint comprises semicircular slide rails fixed at the tops of the three support columns through fourth bolts, a guide block sliding in the slide rails and an upper universal joint connected with the guide block;

the vibration absorption structure comprises: the sliding rail device comprises a connecting rod, an inertia mass block sleeved on the connecting rod and rubber springs arranged on two sides of a guide block in the sliding rail, wherein the upper end of the connecting rod is movably connected with the guide block through an upper bearing and an upper universal joint, and the lower end of the connecting rod is movably connected with a base through a lower bearing and a lower universal joint.

The two devices are respectively arranged in the middle of the front end roof and the middle of the rear end roof of the vehicle body.

The connecting rod is of a stepped shaft structure and is in interference fit with the inertial mass block.

Two end faces of the sliding rail are respectively plugged through a top plate and a first bolt.

The rubber spring be equipped with two, and all be arc.

One end of the first rubber spring is connected with the top plate on one side of the slide rail, the other end of the first rubber spring is connected with one side of the guide block, one end of the second rubber spring is connected with the top plate on the other side of the slide rail, and the other end of the second rubber spring is connected with the other side of the guide block.

The upper end of the connecting rod is connected with the upper bearing inner ring, the upper bearing outer ring is connected with one end of the upper universal joint, the other end of the upper universal joint is connected with the guide block, the lower end of the connecting rod is connected with the lower bearing inner ring, and the lower bearing outer ring is fixed on the base through the lower universal joint.

The direction of the connecting line at the two ends of the semicircular slide rail is the width direction of the vehicle body, and the lower universal joint is fixed at the position of the base and is the center of the projection of the semicircular slide rail on the base.

The specific assembly steps of the device include:

1) Fixing the three pillars with the base through third bolts respectively;

2) Fixing the semicircular slide rail at the top of the strut through a fourth bolt, and enabling a connecting line of the head end and the tail end of the semicircular projection of the semicircular slide rail on the base to be positioned in the width direction of the vehicle body;

3) Fixing an inner ring of an upper bearing and the upper end of a connecting rod, fixing an outer ring of the upper bearing and an upper universal joint, fixing an inner ring of a lower bearing and the lower end of the connecting rod, and fixing an outer ring of the lower bearing and a lower universal joint;

4) Fixing a lower universal joint at the lower end of the connecting rod at the circle center of the semicircular projection of the base, and fixing an upper universal joint at the upper end of the connecting rod with the guide block;

5) Installing a guide block into the slide rail;

6) Two rubber springs are arranged at two sides of a guide block in the slide rail;

7) Fixing two top plates at two ends of the sliding rail through bolts;

8) The device is respectively arranged in the middle of the front end roof and the middle of the rear end roof of the vehicle body through bolts.

When the vehicle vibrates in a torsional mode, the guide block slides in the slide rail and is acted by the rubber springs on two sides in the sliding process, the slide rail is of a semicircular structure, the sliding of the guide block has motion components along the running direction of the vehicle and the width direction of the vehicle body, the motion trail of the connecting rod is a conical surface and is equivalent to that the inertial mass block moves on the conical surface and is also acted by the rubber springs, so that the torsional mode vibration of the vehicle body of the rail vehicle is reduced, and the running stability and riding comfort of the vehicle are improved.

Compared with the prior art, the invention has the following advantages:

1. the invention can be directly arranged on the roof of the car, and has the advantages of easy assembly and convenient use.

2. The method is relatively easy, and has high system working reliability compared with active inhibition without external energy influence.

3. The invention can equivalently move the inertia mass block on the conical surface, namely, components along the running direction of the vehicle and the width direction of the vehicle body exist, and the suppression of the vibration is more flexible.

4. The invention can effectively reduce the torsional mode vibration of the rail vehicle body, and improve the running stability and riding comfort of the vehicle, and has remarkable effect.

5. The assembly structure of the invention improves the mounting and dismounting efficiency and reduces the maintenance cost.

6. The invention can be widely applied to various rail transit vehicles such as ordinary railways, high-speed railways and the like.

Drawings

Fig. 1 is a schematic view of the overall structure of the device.

Fig. 2 is a schematic cross-sectional view of the device.

Fig. 3 is a schematic view of the supporting structure of the device.

Fig. 4 is a schematic structural diagram of the universal joint of the device.

Fig. 5 is a schematic view of torsional modes of the rail vehicle head car and the intermediate car, wherein fig. 5a shows the torsional mode of the head car and fig. 5b shows the torsional mode of the intermediate car.

Fig. 6 is a schematic view of the installation positions of the rail vehicle head car and the middle car device, wherein fig. 6a shows a head car torsional mode, and fig. 6b shows a middle car torsional mode.

The notation in the figure is:

1. slide rail, 2, rubber spring, 3, guide block, 4, universal joint, 5, bearing, 6, roof, 7, first bolt, 8, pillar, 9, inertial mass, 10, connecting rod, 11, base, 12, second bolt, 13, third bolt, 14, fourth bolt.

Detailed Description

The invention is described in detail below with reference to the figures and the specific embodiments.

Examples

As shown in fig. 1 and 2, the present invention provides a device for suppressing torsional mode vibration of a rail vehicle body, which comprises a supporting structure, a guiding structure and a vibration absorbing structure, wherein as shown in fig. 3, the supporting structure mainly comprises a base 11 and a pillar 8, the guiding structure mainly comprises a sliding rail 1, a guiding block 3, a universal joint 4 and a bearing 5, fig. 4 is a schematic structural diagram of elements of the universal joint 4, and the vibration absorbing structure mainly comprises an inertial mass block 9, a connecting rod 10 and a rubber spring 2.

The support structure realizes stable support of the semicircular sliding rail 1 through three pillars 8 and a base 11, the upper end and the lower end of each pillar 8 are respectively fixed with the sliding rail 1 and the base 11 through a third bolt 13 and a fourth bolt 14, and the base 11 is fixed with the roof through a second bolt 12; two circular arc-shaped rubber springs 2 are arranged in the slide rail and are respectively positioned at two sides of the guide block 3, namely two ends of each rubber spring 2 are respectively connected with the top plate 6 and the guide block 3, and the top plate 6 is fixed with the slide rail 1 through a first bolt 7; one end of the universal joint 4 is fixedly connected with the guide block 3, the other end of the universal joint is fixed with the outer ring of the bearing 5, and the inner ring of the bearing 5 is connected with the connecting rod 10; the connecting rod 10 is of a stepped shaft structure and is in interference fit with the inertia mass block 9; the lower end of the connecting rod 10 is also connected with a base 11 through a universal joint 4 and a bearing 5;

the device comprises the following specific assembly steps:

A. fixing the three pillars 8 with the base 11 through third bolts 13 respectively;

B. fixing the slide rail 1 on the top of the strut 8 through a fourth bolt 14;

C. fixing the outer ring of a bearing 5 at the upper end and the lower end of a connecting rod 10 with a universal joint 4, and fixing the inner ring with the connecting rod 10;

D. fixing a universal joint 4 at the lower end of a connecting rod 10 with a base 11, and fixing the universal joint 4 at the upper end of the connecting rod 10 with a guide block 3;

E. installing the guide block 3 into the slide rail 1;

F. two rubber springs 2 are arranged at two sides of a guide block 3 in the slide rail 1;

G. fixing two top plates 6 at two ends of the sliding rail 1 through first bolts 7;

H. the device is respectively arranged in the middle of the front end roof and the middle of the rear end roof of the vehicle body through second bolts 12.

As shown in fig. 5, fig. 5 is a schematic view of torsional modes of a head car and a middle car of a rail vehicle, and in order to suppress torsional mode vibration of a body of the rail vehicle, as shown in fig. 6, the device is respectively installed in the middle of a front end roof and the middle of a rear end roof of the body, when the vehicle vibrates in torsional mode, the guide block 3 can slide in the slide rail 1 and can be acted by a rubber spring in the sliding process, because the slide rail 1 is of a semicircular structure, the guide block 3 slides along the vehicle running direction and the vehicle body width direction, and the motion track of the connecting rod 10 is a conical surface and can be equivalently equivalent to the mass block 9 of inertia to be acted by the rubber spring 2 while moving on the conical surface.

Claims

1. An apparatus for damping torsional mode vibrations of a rail vehicle body, the apparatus comprising:

a support structure: comprises a base (11) fixed on the roof of the vehicle through a second bolt (12) and three struts (8) fixed on the base (11) through third bolts (13) along the semi-circular circumferential direction;

a guide structure: the universal joint comprises a semicircular slide rail (1) fixed at the tops of three support columns (8) through fourth bolts (14), a guide block (3) sliding in the slide rail (1) and an upper universal joint connected with the guide block (3);

the vibration absorption structure comprises: including connecting rod (10), cover establish inertial mass block (9) on connecting rod (10) and set up rubber spring (2) of guide block (3) both sides in slide rail (1), connecting rod (10) upper end through upper bearing and last universal joint and guide block (3) swing joint, the lower extreme is through lower bearing and lower universal joint and base (11) swing joint.

2. The device for suppressing torsional modal vibrations of a rail vehicle body as set forth in claim 1, wherein there are two of the device mounted in front and rear roof center portions of the body, respectively.

3. The device for suppressing torsional mode vibrations of a rail vehicle body as set forth in claim 1, characterized in that the connecting rod (10) is of stepped shaft construction and is interference fitted with the inertial mass (9).

4. The device for suppressing torsional modal vibrations of a rail vehicle body according to claim 1, wherein both end faces of the slide rail (1) are respectively blocked by a top plate (6) and a first bolt (7).

5. The device for damping torsional mode vibrations of a rail vehicle body as set forth in claim 4, characterized in that two of said rubber springs (2) are provided and are each shaped as a circular arc.

6. A device for damping torsional mode vibrations of a rail vehicle car body according to claim 5, characterized in that a first rubber spring is connected at one end to the top plate (6) on one side of the slide rail (1) and at the other end to one side of the guide block (3), and a second rubber spring is connected at one end to the top plate (6) on the other side of the slide rail (1) and at the other end to the other side of the guide block (3).

7. The device for suppressing torsional mode vibration of a railway vehicle body according to claim 1, wherein the upper end of the connecting rod (10) is connected with an upper bearing inner ring, an upper bearing outer ring is connected with one end of an upper universal joint, the other end of the upper universal joint is connected with the guide block (3), the lower end of the connecting rod (10) is connected with a lower bearing inner ring, and the lower bearing outer ring is fixed on the base (11) through the lower universal joint.

8. The device for inhibiting the torsional mode vibration of the railway vehicle body according to claim 1, wherein the connecting line of the two ends of the semicircular slide rail (1) is in the width direction of the vehicle body, and the position where the lower universal joint is fixed on the base (11) is the center of the projection of the semicircular slide rail (1) on the base (11).

9. The device for suppressing torsional mode vibrations of a rail vehicle body according to claim 1, wherein the device is specifically assembled by steps comprising:

1) The three pillars (8) are respectively fixed with the base (11) through third bolts (13);

2) Fixing the semicircular slide rail (1) at the top of the strut (8) through a fourth bolt (14), and enabling a connecting line of the head end and the tail end of a semicircular projection of the semicircular slide rail (1) on the base (11) to be positioned in the width direction of the vehicle body;

3) Fixing an inner ring of an upper bearing with the upper end of a connecting rod (10), fixing an outer ring with an upper universal joint, fixing an inner ring of a lower bearing with the lower end of the connecting rod (10), and fixing the outer ring with a lower universal joint;

4) Fixing a lower universal joint at the lower end of a connecting rod (10) at the circle center of the semicircular projection of the base (11), and fixing an upper universal joint at the upper end of the connecting rod (10) with the guide block (3);

5) Installing the guide block (3) into the slide rail (1);

6) Two rubber springs (2) are arranged on two sides of a guide block (3) in the slide rail (1);

7) Fixing two top plates (6) at two ends of the sliding rail (1) through first bolts (7);

8) The device is respectively arranged in the middle of the front end roof and the middle of the rear end roof of the vehicle body through second bolts (12).

10. The device for inhibiting the torsional mode vibration of the vehicle body of the railway vehicle is characterized in that when the vehicle vibrates in the torsional mode, the guide block (3) slides in the slide rail (1) and is acted by the rubber springs (2) on two sides in the sliding process, because the slide rail (1) is of a semicircular structure, the guide block (3) slides to have motion components along the vehicle running direction and the vehicle body width direction, the motion track of the connecting rod (10) is a conical surface, and equivalently, the inertial mass block (9) moves on the conical surface and is also acted by the rubber springs (2), so that the torsional mode vibration of the vehicle body of the railway vehicle is reduced, and the running stability and the riding comfort of the vehicle are improved.