CN113459816A

CN113459816A - Rail transit train carbon slide

Info

Publication number: CN113459816A
Application number: CN202110909163.1A
Authority: CN
Inventors: 顾晓菡; 王安斌; 马子彦; 邬奇睿
Original assignee: Shanghai University of Engineering Science
Current assignee: Shanghai University of Engineering Science
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2021-10-01

Abstract

The invention relates to a carbon sliding plate of a rail transit train, which comprises a carbon plate and a base module, wherein the carbon plate is fixed on the top surface of the base module, and the front N-order vibration modal frequency of the carbon sliding plate formed by the carbon plate and the base module is higher than the coupling excitation frequency and the resonance frequency between a pantograph and a contact net of the train. Compared with the prior art, the carbon slide plate provided by the invention has the advantages that the vibration response of the carbon slide plate under the interaction of the pantograph and the catenary is reduced, the friction loss of the carbon slide plate is further reduced, the current collection quality is improved, and the potential safety hazard caused by abnormal wear of the pantograph and the catenary is reduced.

Description

Rail transit train carbon slide

Technical Field

The invention relates to the field of rail transit equipment, in particular to a carbon sliding plate of a rail transit train.

Background

The current is provided to the train from the contact net through the train pantograph in the rail transit way of receiving current is the current domestic main train way of receiving current. The carbon slide plate is one of main parts of the pantograph, is in direct contact with a contact net lead to collect current, and then is provided for a train through the pantograph. In order to meet the requirements of stability and continuity of current collection and train operation safety, the carbon sliding plate and a contact net lead need to keep good following performance.

The contact net lead is usually arranged in a zigzag shape or a sine shape to the circuit, so that the carbon slide plate does reciprocating motion within the stretching limit value range, and the carbon slide plate of the pantograph is ensured to be evenly worn and consumed within the specified range. In the process of rapid operation of a train, a pantograph carbon slide plate is always exposed in a natural environment, and due to multiple reasons such as surrounding environment influence, microscopic irregularity of a contact net, complexity of interaction of the pantograph and the like, the carbon slide plate and a contact net lead generate friction and impact, high-amplitude vibration in a medium-high frequency range is caused, and abrasion of the carbon slide plate is accelerated.

The existing technology generally isolates and absorbs high-frequency vibration from an arch structure and a damping system of a pantograph, but cannot effectively isolate or absorb medium and low frequency (<200Hz) vibration caused by self resonance of a carbon sliding plate.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a carbon slide plate for a rail transit train.

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

the carbon sliding plate comprises a carbon plate and a base body module, wherein the carbon plate is fixed on the top surface of the base body module, the N-order vibration modal frequency of the carbon sliding plate formed by the carbon plate and the base body module is higher than the coupling excitation frequency and the resonance frequency between a pantograph and a contact net of a train, and N is a positive integer of 1-10.

Further, the base module comprises a metal base body which is a rectangular box body or a trapezoidal box body with a hollow interior.

Furthermore, a first partition plate and a second partition plate are arranged in the metal base body, and the first partition plate and the second partition plate are mutually crossed and are respectively connected with a group of diagonal edges of the metal base body.

Further, the metal matrix is made of an aluminum alloy or copper alloy material.

Furthermore, the wall thickness of the metal matrix is 2-5 mm.

Further, the matrix module comprises a metal matrix and a rigidity adjusting body, the carbon plate is fixed on the top surface of the metal matrix, and the rigidity adjusting body is fixed on the bottom surface of the metal matrix.

Further, the rigidity adjusting body is a metal block made of aluminum alloy or titanium alloy material.

Furthermore, the elasticity modulus of the rigidity adjusting body is 70-500 Gpa.

Further, a nano composite material layer or a metal ceramic layer is coated outside the rigidity adjusting body.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the bending rigidity of the base module in the carbon slide plate of the train is increased by changing the structure of the base module, namely, the vibration modal frequency is improved, so that the vibration modal frequency of the carbon slide plate avoids the coupling excitation frequency and the resonance frequency between a pantograph and a contact network of the train, the vibration response of the carbon slide plate under the interaction of the pantograph and the contact network is reduced, the friction loss of the carbon slide plate is further reduced, the current collection quality is improved, and the potential safety hazard caused by abnormal abrasion of the pantograph and the contact network is reduced.

2. According to the invention, the metal matrix in the matrix module is redesigned to be the rectangular box body or the trapezoidal box body with a hollow interior, so that the section moment of inertia is effectively improved. By the formula: the bending stiffness is known as the elastic modulus and the section moment of inertia, the section moment of inertia is in direct proportion to the bending stiffness, and the bending stiffness is in direct proportion to the vibration mode frequency, so that the metal matrix which is re-optimally designed can effectively improve the vibration mode frequency, avoid the occurrence of carbon sliding plate resonance and abnormal abrasion, and further prolong the service life of the carbon sliding plate.

3. The rigidity adjusting body can be arranged on the existing metal base body, so that the elastic modulus of the whole base body module is improved. By the formula: the bending rigidity is the elastic modulus and the section moment of inertia, the elastic modulus is in direct proportion to the bending rigidity, and the bending rigidity is in direct proportion to the vibration modal frequency, so that the overall bending rigidity of the existing metal matrix structure, namely the vibration modal frequency, is effectively increased by arranging the rigidity adjusting body on the existing metal matrix, and the resonance and abnormal abrasion of the carbon sliding plate are avoided, so that the carbon sliding plate is convenient to realize and high in practicability.

Drawings

Fig. 1 is a schematic structural diagram of the first embodiment.

Fig. 2 is a schematic structural diagram of another form of the first embodiment.

Fig. 3 is a schematic structural diagram of the second embodiment.

Fig. 4 is a schematic structural diagram of another embodiment.

Fig. 5 is a schematic structural diagram of the third embodiment.

Fig. 6 is a schematic structural diagram of the prior art.

Reference numerals: 1. carbon plate, 2, metal matrix, 21, first baffle, 22, second baffle, 3, rigidity regulating body.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example 1

As shown in fig. 1, the present embodiment provides a rail transit train carbon slide plate, which comprises a carbon plate 1 and a metal base body 2, wherein the carbon plate 1 is installed on the top surface of the metal base body 2 in a bonding manner. The metal matrix 2 is an aluminum alloy metal matrix, and the specific structure is a rectangular box body with a hollow interior. The length of this box is 61mm, and the height is 22mm, and the wall thickness is 2 ~ 5mm generally, selects 3mm in this embodiment.

The section moment of inertia in this embodiment is:

while, as shown in FIG. 6, the cross-sectional moment of inertia of a conventional structure of comparable size is

It can be seen that the structure of the present embodiment can significantly improve the second moment of area of the metal base 2.

The following formula:

bending stiffness-elastic modulus E-section moment of inertia I

It can be known that the section moment of inertia is in direct proportion to the bending stiffness, and the bending stiffness is in direct proportion to the vibration modal frequency, so that the increase of the section moment of inertia can significantly increase the vibration modal frequency of the metal matrix 2, so that the common first N (preferably 6 in this embodiment) order vibration modal frequency of the carbon plate 1 and the metal matrix 2 is higher than the coupling excitation frequency and the resonance frequency between the pantograph and the catenary of the train, that is, the overall vibration modal frequency of the carbon sliding plate avoids the coupling excitation frequency and the resonance frequency between the pantograph and the catenary of the train. Therefore, the vibration response of the carbon sliding plate under the interaction of the pantograph and the catenary is reduced, the effects of reducing the friction loss of the carbon sliding plate, improving the current collection quality and reducing the potential safety hazard caused by abnormal abrasion of the pantograph and the catenary are achieved.

In another modification of the present embodiment, as shown in fig. 2, a first partition 21 and a second partition 22 are provided in the interior of the metal base 2 so as to intersect with each other, and the first partition 21 and the second partition 22 are connected to a set of diagonal edges of the metal base 2, respectively. The section moment of inertia of the structure is as follows:

the structure can further improve 1 the section inertia moment of the metal matrix 2 through the added partition plates, and simultaneously improve the strength of the metal matrix 2.

Example 2

As shown in fig. 3, the present embodiment provides a carbon slide plate for a rail transit train, which has the same overall structure as that of embodiment 1, and is different in that: the metal substrate 2 is made of copper alloy materials, and is a trapezoidal box body with a hollow interior. The length of the top surface of the box body is 61mm, the length of the bottom surface of the box body is 82mm, and the height of the box body is 22 mm.

The section moment of inertia of the structure is as follows:

this structure can improve the support stability while improving the sectional moment of inertia of metal matrix 2.

As shown in fig. 4, in another modification of the present embodiment, a first partition 21 and a second partition 22 are provided in the interior of the metal base 2 so as to intersect with each other, and the first partition 21 and the second partition 22 are connected to a set of diagonal edges of the metal base 2, respectively.

The section moment of inertia of the structure is as follows:

it is understood that the deformed structure can further improve the sectional moment of inertia of the metal base 2 and improve the strength of the metal base 2 itself.

Example 3

As shown in fig. 5, the present embodiment provides a carbon slide plate for a rail transit train, which includes a carbon plate 1 and a base module, wherein the base module includes a metal base 2 and a rigidity adjusting body 3. The carbon plate 1 is fixed on the top surface of the metal substrate 2, and the rigidity adjusting body 3 is arranged on the bottom surface of the metal connecting layer. In the present example, the metal substrate 2 is a commercially available conventional metal substrate 2, and may be the metal substrate 2 of examples 1 and 2. The rigidity adjusting block is a metal block made of aluminum alloy or titanium alloy material, the titanium alloy metal block is adopted in the embodiment, and a nano composite material layer or a metal ceramic layer is coated on the outer side of the titanium alloy metal block, so that the elastic modulus of the titanium alloy metal block is 70-500 Gpa. Therefore, the overall elastic modulus of the base module is obviously improved under the compounding of the rigidity adjusting block. The following formula:

bending stiffness-elastic modulus E-section moment of inertia I

Therefore, the elastic modulus is in direct proportion to the bending rigidity, and the bending rigidity is in direct proportion to the vibration modal frequency, so that the vibration modal frequency of the base module can be obviously increased by increasing the elastic modulus, and the first 6-order vibration modal frequency of the base module is higher than the coupling excitation frequency and the resonance frequency between a pantograph and a catenary of a train, namely the whole vibration modal frequency of the carbon sliding plate avoids the coupling excitation frequency and the resonance frequency between the pantograph and the catenary of the train. Therefore, the vibration response of the carbon sliding plate under the interaction of the pantograph and the catenary is reduced, the effects of reducing the friction loss of the carbon sliding plate, improving the current collection quality and reducing the potential safety hazard caused by abnormal abrasion of the pantograph and the catenary are achieved.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The carbon sliding plate for the rail transit train is characterized by comprising a carbon plate (1) and a base body module, wherein the carbon plate (1) is fixed on the top surface of the base body module, the N-order vibration modal frequency of the carbon sliding plate formed by the carbon plate (1) and the base body module is higher than the coupling excitation frequency and the resonance frequency between a pantograph and a contact net of the train, and N is a positive integer of 1-10.

2. A rail transit train carbon slide as claimed in claim 1, characterized in that said base module comprises a metal base (2), the metal base (2) being a rectangular box or a trapezoidal box hollow inside.

3. A rail transit train carbon slide according to claim 2, characterized in that a first partition (21) and a second partition (22) are provided in said metal base (2), said first partition (21) and said second partition (22) being crossed each other and respectively connecting a set of diagonal edges of said metal base (2).

4. The carbon slide plate of the rail transit train as claimed in claim 2, wherein the metal matrix (2) is made of an aluminum alloy or copper alloy material.

5. The carbon slide plate for the rail transit train as claimed in claim 2, wherein the wall thickness of the metal substrate (2) is 2-5 mm.

6. The carbon slide plate of the rail transit train as claimed in claim 1, wherein the base module comprises a metal base (2) and a rigidity adjusting body (3), the carbon plate (1) is fixed on the top surface of the metal base (2), and the rigidity adjusting body (3) is fixed on the bottom surface of the metal base (2).

7. The carbon slide plate of the rail transit train as claimed in claim 6, wherein the rigidity adjusting body (3) is a metal block of aluminum alloy or titanium alloy material.

8. The carbon slide plate of the rail transit train as claimed in claim 6, wherein the rigidity adjusting body (3) has an elastic modulus of 70-500 Gpa.

9. The carbon slide plate for rail transit trains as claimed in claim 6, wherein said rigidity adjusting body (3) is coated with a nano composite material layer or a cermet layer.