CN107453060B - A kind of track earthing or grounding means - Google Patents
A kind of track earthing or grounding means Download PDFInfo
- Publication number
- CN107453060B CN107453060B CN201710630692.1A CN201710630692A CN107453060B CN 107453060 B CN107453060 B CN 107453060B CN 201710630692 A CN201710630692 A CN 201710630692A CN 107453060 B CN107453060 B CN 107453060B
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- China
- Prior art keywords
- brush
- grounding means
- track
- frictional disk
- earthing
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
Abstract
The invention discloses a kind of track earthing or grounding means, it is connected between car body and frictional disk, for the electrical connection between car body and rail to be connected to be grounded function, device includes: the rigid brush that car body is connected to by elastic mechanism, rigid brush and frictional disk rigid contact；The flexible brush being connected with rigid brush, flexible brush further comprises the pedestal for being fixedly connected on rigid brush, and is connected to the brush wires of pedestal, brush wires and frictional disk Elastic Contact.Flexible brush can effectively improve the ground connection performance of direct current and industrial frequency AC, the service life of advancing the track earthing or grounding means.High-frequency current channel is formed in the contact area of flexible brush and frictional disk simultaneously, is conducive to the high-frequency harmonic current direction rail in track electrical system, can effectively reduce system electromagnetic interference.The present invention is able to solve long term wear when traditional earthing or grounding means is contacted because of earthing or grounding means carbon brush surface and frictional disk, causes ground resistance excessive and earth current is caused to flow back small technical problem.
Description
Technical field
The present invention relates to rail traffic grounding technology fields, more particularly, to a kind of track earthing or grounding means.
Background technique
In the operation of rail truck, it is indispensable that bearing, which keeps good state,.Once track and vehicle contact
Part is abnormal, and will damage bearing.Research finds that the damage of bearing mainly makes axis by the electric current for flowing through shaft, bearing etc.
Inner wall galvano-cautery damage is held, which mainly punctures bearing film by shaft voltage between stator and rotor.Cause the electricity of bearing damage
Stream is referred to as electrical discharge machining (Electrical Discharge Machining, EDM) shaft current.Switching device is quick
Voltage is rapidly rising or falling in a short time in interrupting process, will aggravate the electricity of the bearing in machine winding insulating pressure and bearing
Pressure pressure.In order to change this status, earthed brush often is installed on EMU wheel hub on subway at present, so that leakage current passes through
Car body and wheel hub are connected to ground level.
It as shown in Fig. 1, is track electrical system schematic diagram, which includes: frictional disk 4, shaft coupling, gear-box, vehicle
Body 6, wheel 7, rail 8, powering shelf 9, track earthing or grounding means 10, inverter 11, motor 12 and bogie 13 etc..Wherein, inversion
Device 11 uses 1500V direct current supply, and track earthing or grounding means 10 is by grounding carbon brush/frictional disk 4 and wheel (i.e. axle and wheel to) 7 companies
It is connected on wheel hub.It is found that all common mode circuits of system will be back to rail by grounding carbon brush/frictional disk 4 from attached drawing 1
8, therefore the electric property quality of grounding carbon brush/frictional disk 4 is related to the reflux performance of track electrical system.As shown in Fig. 2,
For the structural schematic diagram of conventional rails earthing or grounding means, in figure: 3 indicate that traditional rigid brush, 4 indicate that frictional disks, 5 indicate elasticity
Mechanism (such as spring), to being co-axially located on axle, (frictional disk 4 and wheel are to being co-axially located at vehicle by tooling and wheel for frictional disk 4
On axis).Track earthing or grounding means is using double carbon brush structures, and carbon brush material is cupric graphite, and using the elasticity of constant pressure rolled structure
Mechanism (such as spring) 5 keeps the pressure contacted between carbon brush and grounding copper axis uniform, to realize track earthing or grounding means 10 and vehicle
It is reliably electrically connected between body 6.Frictional disk 4 as the time that vehicle is run is elongated, on track earthing or grounding means 10 and vehicle
It will appear uneven and abrasion trace, as shown in Fig. 3.Will lead to track earthing or grounding means 10 in this way can not be good
Ground ground connection, ground resistance become larger, and leakage current, shaft current cannot be conducted on rail 8 by track earthing or grounding means 10 well.
It in the prior art, is Sichuan inter-city rail transit limited material duty with the immediate technical solution of the present patent application
Ren company applied on 03 12nd, 2014, and announced on 09 03rd, 2014, and notification number is the practical of CN203813041U
New patent " a kind of electric locomotive earthing device " discloses a kind of traditional earthing or grounding means.Utility model patent description
Electric locomotive earthing device, including brush box, the brush holder being fixed in brush box and the carbon brush being arranged on brush holder, carbon brush end is logical
It crosses flexible cord to connect with brush holder, it includes ground connection that brush holder, which is equipped with the carbon brush being arranged in for conductive cable connecting terminal on brush holder,
Being both provided between the bottom and brush holder of carbon brush and extinguishing arc carbon brush, grounding carbon brush and extinguishing arc carbon brush makes carbon brush head and round friction
The spring that copper dish are in close contact.Grounding carbon brush and extinguishing arc carbon brush is arranged by the different zones in brush holder in the utility model, simultaneously
To between grounding carbon brush and friction copper dish, apply pressure of different sizes respectively between extinguishing arc carbon brush and friction copper dish, thus real
Existing grounding carbon brush not only has long service life, but be avoided that earthing or grounding means under judder operating condition due to grounding carbon brush with rub
After wiping disk separation, cause to generate high voltage generation starting the arc scaling loss therebetween.
However, although traditional track earthing or grounding means 10 has good conducting effect to direct current and industrial frequency AC,
It is larger to the radio-frequency component impedance in electric current, it be grounded high-frequency harmonic electric current can not by carbon brush, exacerbate track electrical system
Interior electromagnetic interference.In addition, in use for some time, the contact surface between traditional carbon brush and frictional disk can generate certain mill
Damage, roughness increases, contact area reduces, and becomes larger so as to cause ground resistance, shaft current cannot be absorbed by wheel hub well.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of track earthing or grounding means, to solve traditional earthing or grounding means because connecing
Long term wear when ground device carbon brush surface and frictional disk contact causes ground resistance excessive and earth current is caused to flow back small skill
Art problem.
In order to achieve the above-mentioned object of the invention, the present invention specifically provides a kind of technic relization scheme of track earthing or grounding means,
A kind of track earthing or grounding means, is connected between car body and frictional disk, for the electrical connection between the car body and rail to be connected
To be grounded function, the track earthing or grounding means includes:
The rigid brush of the car body is connected to by elastic mechanism, the rigidity brush rigidly connects with the frictional disk
Touching；
The flexible brush being connected with the rigid brush, the flexibility brush further comprises being fixedly connected on the rigidity
The pedestal of brush,
And the brush wires of the pedestal are connected to, the brush wires and the frictional disk Elastic Contact.
Preferably, contact bottom surface of the brush wires length of the flexible brush beyond the rigid brush and the frictional disk
0.5cm~2.5cm.
Preferably, the brush wires of the friction face contact of the flexible brush and the frictional disk, the flexibility brush are goed deep into
In the gap of the rubbing surface, several small capacitances are formed between the brush wires and the frictional disk, by the flexibility
The contact area of brush and the frictional disk forms high-frequency current channel, reduces between the flexible brush and the frictional disk
High-frequency resistance makes rail described in the high-frequency harmonic current direction in track electrical system, to reduce entire track electrical system
Electromagnetic interference.
Preferably, the brush wires of the flexible brush are using any one in carbon fiber, graphite fibre or metallic fiber
Or two or more composite fibre.The metallic fiber is two or more using any one including silver, aluminium or cathode copper
Metal material.
Preferably, the heat-resisting material that weight percent is 1%~10% is also mixed in the brush wires of the flexible brush.
Preferably, the pedestal is using any one material in pure graphite plate, electrographite plate or metallic graphite carbon plate.When
The metal adulterated when the pedestal uses metallic graphite carbon plate, in the pedestal be any including silver, aluminium, lead or copper or
Two or more metals.
Preferably, the rigid brush uses rectangular parallelepiped structure, the length-width ratio of the rigidity brush between 3:1~5:1 it
Between.
Preferably, the arithmetic mean of instantaneous value deviation in profile gap is small between the flexible brush and the rubbing surface of the frictional disk
In 3.2 μm.
Preferably, the flexible brush is symmetrically arranged at the left and right sides of the rigid brush.
Preferably, the flexible brush structure annular in shape is around the outside of the rigid brush.
Preferably, the width of the rigid brush is approximately equal with the unilateral flexible width of brush.
Preferably, the rigid brush is symmetrically arranged at the left and right sides of the flexible brush.
Preferably, the rigid brush structure annular in shape is around the outside of the flexible brush.
Preferably, the width of the flexible brush is approximately equal with the unilateral rigid width of brush.
Invention also specifically provides the technic relization scheme of another track earthing or grounding means, and a kind of track earthing or grounding means connects
It is connected between car body and frictional disk, it is described for the electrical connection between the car body and rail to be connected to be grounded function
Track earthing or grounding means includes flexible brush, and the flexibility brush further comprises:
It is connected to the pedestal of the car body；
And the brush wires of the pedestal are connected to, the brush wires and the frictional disk Elastic Contact.
Preferably, the brush wires of the friction face contact of the flexible brush and the frictional disk, the flexibility brush are goed deep into
In the gap of the rubbing surface, several small capacitances are formed between the brush wires and the frictional disk, by the flexibility
The contact area of brush and the frictional disk forms high-frequency current channel, reduces between the flexible brush and the frictional disk
High-frequency resistance makes rail described in the high-frequency harmonic current direction in track electrical system, to reduce entire track electrical system
Electromagnetic interference.
Preferably, the brush wires of the flexible brush are using any one in carbon fiber, graphite fibre or metallic fiber
Or two or more composite fibre.The metallic fiber is two or more using any one including silver, aluminium or cathode copper
Metal material.
Preferably, the heat-resisting material that weight percent is 1%~10% is also mixed in the brush wires of the flexible brush.
Preferably, the pedestal is using any one material in pure graphite plate, electrographite plate or metallic graphite carbon plate.When
The metal adulterated when the pedestal uses metallic graphite carbon plate, in the pedestal be any including silver, aluminium, lead or copper or
Two or more metals.
Preferably, the arithmetic mean of instantaneous value deviation in profile gap is small between the flexible brush and the rubbing surface of the frictional disk
In 3.2 μm.
By implementing the technical solution for the track earthing or grounding means that aforementioned present invention provides, have the following beneficial effects:
(1) present invention improves the contact surface state between track earthing or grounding means and frictional disk, can effectively solve the problem that because
To be widely used in the long caused earthing or grounding means of Train Schedule containing bearing brought by compound brush and friction mill damage
Electric current is unable to the problem of good reflux；
(2) present invention not only increases the contact area between track earthing or grounding means and frictional disk, while not influencing rail also
The good operating status of road vehicular traffic, flexible brush can effectively improve the ground connection performance of direct current and industrial frequency AC, extend from
And the service life of track earthing or grounding means；
(3) contact area of the invention in flexible brush and frictional disk, the high-frequency resistance of circuit decline to a great extent, and form height
Frequency current channel is conducive to the high-frequency harmonic current direction rail in track electrical system, it is electrical to can effectively reduce entire track
The electromagnetic interference of system.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.It should be evident that the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other embodiments are obtained according to these attached drawings.
Fig. 1 is the system structure diagram of rail truck electrical system in the prior art；
Fig. 2 is the structural schematic diagram of prior art middle orbit earthing or grounding means；
Fig. 3 is the partial enlargement structural representation of contact surface between Fig. 2 middle orbit earthing or grounding means and frictional disk；
Fig. 4 is the mounting structure schematic diagram of track earthing or grounding means embodiment 1 of the present invention；
Fig. 5 is the structural schematic diagram of track earthing or grounding means embodiment 2 of the present invention；
Fig. 6 is the partial enlargement structural representation in Fig. 4；
Fig. 7 is the partial enlargement of contact surface between flexible brush and frictional disk in track earthing or grounding means embodiment 1 of the present invention
Structural schematic diagram；
Fig. 8 is the mounting structure front view of track earthing or grounding means embodiment 3 of the present invention；
Fig. 9 is the mounting structure top view of track earthing or grounding means embodiment 4 of the present invention；
Figure 10 is the mounting structure front view of track earthing or grounding means embodiment 4 of the present invention；
In figure: 1- flexibility brush, 2- pedestal, 3- rigidity brush, 4- frictional disk, 5- elastic mechanism, 6- car body, 7- wheel,
8- rail, 9- powering shelf, 10- track earthing or grounding means, 11- inverter, 12- motor, 13- bogie, 20- brush wires.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is only
It is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel all other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
As shown in attached drawing 4 to attached drawing 10, the specific embodiment of track earthing or grounding means of the present invention is given, with reference to the accompanying drawing
The invention will be further described with specific embodiment.
Embodiment 1
As shown in Fig. 4, a kind of specific embodiment of track earthing or grounding means, track earthing or grounding means 10 be connected to car body 6 with
Between frictional disk 4, for the electrical connection between car body 6 and rail 8 to be connected to be grounded function, track earthing or grounding means 10 is wrapped
It includes:
The rigid brush 3 of car body 6, rigid brush 3 and 4 rigid contact of frictional disk are connected to by elastic mechanism 5；
The flexible brush 1 being connected with rigid brush 3, flexible brush 1 further comprise the bottom for being fixedly connected on rigid brush 3
Seat 2, and the brush wires 20 of pedestal 2 are connected to, brush wires 20 and 4 Elastic Contact of frictional disk, as shown in Fig. 6.Pedestal 2 can pass through
It such as snaps connection, weld, being bonded mode and rigid brush 3 is reliably connected (including mechanical connection and electrical connection), while
Uniform on pedestal 2, implanting flexible securely brush wires 20.In the present embodiment, in order to further increase track earthing or grounding means
10 conduction property, make each frequency range (especially high frequency) electric current can good earth, reduce track electrical system inside electricity
Magnetic disturbance increases on the basis of rigid brush 3 and uses flexible structure flexibility brush 1.
In order to further ensure well contacting and saving cost between flexible brush 1 and frictional disk 4, flexible brush 1
The length of brush wires 20 exceeds contact bottom surface 0.5cm~2.5cm of rigid brush 3 and frictional disk 4.Meanwhile rigid brush 3 should be with
The holding of frictional disk 4 comes into full contact with, and the tolerance of rigid brush 3 and 4 contact surface of frictional disk is no more than 0.1mm.
As shown in Fig. 7, flexible brush 1 expands the contact surface between track earthing or grounding means 10 and frictional disk 4, while soft
Property brush 1 there is certain elasticity, can be bent, be not easy to lose, belong to soft connection device, ensure that the wearing part of contact surface
It being capable of reliable ground.Therefore, flexible brush 1 can effectively improve the ground connection performance of direct current and industrial frequency AC, effective advancing the track
The service life of earthing or grounding means 10.Importantly, when the friction face contact of flexible brush 1 and frictional disk 4, flexible brush 1
Brush wires 20 go deep into the gap of rubbing surface, be equivalent to and form several small capacitances between flexible brush 1 and frictional disk 4.By
There is the characteristic of low impedance at high frequency in small capacitances, therefore form high-frequency current in the contact area of brush wires 20 and frictional disk 4
Channel reduces the high-frequency resistance between flexible brush 1 and frictional disk 4, makes the high-frequency harmonic electric current stream in track electrical system
To rail 8, to reduce the electromagnetic interference of entire track electrical system.
The brush wires 20 of flexible brush 1 further using in carbon fiber, graphite fibre or metallic fiber any one or
Two or more composite fibre.Metallic fiber uses any one two or more metal including silver, aluminium or cathode copper
Material, to further increase the flexibility and wearability of brush wires 20 on the basis of conduction.The overall conductivity of flexible brush 1
Can be good, and have the machinery and mechanical property for meeting earthing or grounding means requirement, at the same have it is wear-resisting, be not easy to lose, with frictional disk 4
The advantages that elastic reliable contacts.
The heat-resisting material that weight percent is 1%~10% is also mixed in the brush wires 20 of flexible brush 1, such as acrylic fibers fibre
Dimension, vinylon fiber, nylon fibre, polyester fiber, aramid fiber, polyimides (PI) fiber, polytetrafluoroethylene (PTFE) (PTFE) etc.
Material.
Pedestal 2 further using any one material in pure graphite plate, electrographite plate or metallic graphite carbon plate, works as pedestal
When 2 use metallic graphite carbon plate, the metal adulterated in pedestal 2 is any one or more including silver, aluminium, lead or copper
Metal.
Then the brush wires 20 of flexible brush 1 can be by passing through card for metal mesh again on conductive adhesive to metal mesh
The types of attachment such as button, which are fastenedly connected, to be connected on pedestal 2.By injecting conducting resinl between metal mesh and pedestal 2, it is able to ascend
The electric conductivity of flexible brush 1.
According to different application scenarios, the size of track earthing or grounding means 10 difference.By taking rail truck as an example, in order to protect
It demonstrate,proves the mechanical strength of track earthing or grounding means 10 and saves the spatial volume of its installation, rigid brush 3 uses rectangular parallelepiped structure, rigidity
The length-width ratio (b/a as shown in Fig. 6) of brush 3 is between 3:1~5:1, width dimensions (such as attached drawing 6 of rigid brush 3
Shown in middle a) it is approximately equal with the width dimensions (as shown in c in attached drawing 6) for the flexible brush 1 for being located at rigid 3 left and right sides of brush,
To save spatial volume shared by track earthing or grounding means 10 while reducing difficulty of processing.
In order to promote the service life of flexible brush 1, its ground resistance is reduced, frictional disk 4 and flexible electrical should be minimized
The surface roughness contacted between brush 1, makes gap profile between flexible brush 1 and the rubbing surface of frictional disk 4 (such as d institute in attached drawing 7
Show) arithmetic average deviation less than 3.2 μm, show the thin of contact surface between flexible brush 1 and frictional disk 4 as shown in Fig. 7
Section.
As a kind of preferable specific embodiment of the present invention, material cost, the electric conductivity, machinery of comprehensive track earthing or grounding means
The considerations of intensity and service life, pedestal 2 use electrographite plate, and the brush wires 20 of flexible brush 1 use composite fibre,
The weight percent of middle graphite is 85% or so, and metal material uses cathode copper and aluminium, and weight percent is 10% or so.This
Outside, the fire resistant resin that weight percent is 5% or so is mixed also into brush wires 20.And flexible brush 1 and rigid brush 3
Length-width ratio uses 4:1, and using two groups of flexibility brushes 1, one group of rigidity brush 3, therefore total length-width ratio altogether is 4:3.Flexible brush 1
Length exceed 1.5cm than the length of rigid brush 3, flexible brush 1 and the arithmetic mean of instantaneous value of the gap profile of frictional disk 4 are kept
It is 2.4 μm.
In the present embodiment, flexible brush 1 is symmetrically arranged at the left and right sides of rigid brush 3, can also be rigid electric
Brush 3 is symmetrically arranged at the left and right sides of flexible brush 1, as shown in Fig. 8.
Embodiment 1 provides a kind of technical solution of earthing or grounding means applied to urban track traffic electrical system, solves
Long term wear when traditional earthing or grounding means is contacted because of earthing or grounding means carbon brush surface and frictional disk 4, and cause ground resistance is excessive to make
Flow back small technical problem at earth current.Embodiment 1 by the left and right ends of rigid brush 3 be arranged flexible brush 1 or
Flexible brush 1 is enclosed in design one around rigid brush 3, increases the contact area of frictional disk 4 Yu track earthing or grounding means 10, simultaneously
Also it compensates for because the brush of track earthing or grounding means 10 bursts apart and damaged bring adverse effect.
Embodiment 2
As shown in Fig. 5, a kind of specific embodiment of track earthing or grounding means, track earthing or grounding means 10 be connected to car body 6 with
Between frictional disk 4, for the electrical connection between car body 6 and rail 8 to be connected to be grounded function, track earthing or grounding means 10 is wrapped
Flexible brush 1 is included, flexible brush 1 further comprises:
It is connected to the pedestal 2 of car body 6；
And the brush wires 20 of pedestal 2 are connected to, brush wires 20 and 4 Elastic Contact of frictional disk.
The friction face contact of flexible brush 1 and frictional disk 4, the brush wires 20 of flexible brush 1 are goed deep into the gap of rubbing surface,
Several small capacitances are formed between the brush wires 20 and frictional disk 4 of flexible brush 1, pass through connecing in flexible brush 1 and frictional disk 4
It touches region and forms high-frequency current channel, reduce the high-frequency resistance between flexible brush 1 and frictional disk 4, make in track electrical system
High-frequency harmonic current direction rail 8, to reduce the electromagnetic interference of entire track electrical system.
Wherein, the brush wires 20 of flexible brush 1 are further using any one in carbon fiber, graphite fibre or metallic fiber
Kind or two or more composite fibre.Metallic fiber is further using any one two kinds including silver, aluminium or cathode copper
Above metal material.Can also be further incorporated into the brush wires 20 of flexible brush 1 weight percent be 1%~10% it is resistance to
High-temperature material.
Pedestal 2 is further using any one material in pure graphite plate, electrographite plate or metallic graphite carbon plate.Work as pedestal
When 2 use metallic graphite carbon plate, the metal adulterated in pedestal 2 is any one or more including silver, aluminium, lead or copper
Metal.
The arithmetic mean of instantaneous value deviation in profile gap is further less than 3.2 μ between flexible brush 1 and the rubbing surface of frictional disk 4
m。
The more detailed technical solution of rest part can be referring in particular to the corresponding description in embodiment 1.
Embodiment 3
On the basis of embodiment 1, rigid brush 3 further structure annular in shape of surrounding around the outside of flexible brush 1,
The more detailed technical solution of rest part can be referring in particular to the corresponding description in embodiment 1.
Embodiment 4
As shown in attached drawing 9 and attached drawing 10, on the basis of embodiment 1, flexible brush 1 further enclose by structure annular in shape of surrounding
It is around in the outside of rigid brush 3, the more detailed technical solution of rest part can be referring in particular to accordingly retouching in embodiment 1
It states.
By implementing the technical solution of the track earthing or grounding means of specific embodiment of the invention description, following technology can be generated
Effect:
(1) the track earthing or grounding means of specific embodiment of the invention description improves between track earthing or grounding means and frictional disk
Contact surface state can effectively solve the problem that because of the cupric carbon being widely used in the long caused earthing or grounding means of Train Schedule
The problem of brush is unable to good reflux with shaft current brought by friction mill damage；
(2) the track earthing or grounding means of specific embodiment of the invention description not only increase track earthing or grounding means and frictional disk it
Between contact area, while not influencing the good operating status of rail traffic vehicles also, flexible brush can effectively improve direct current
With the ground connection performance of industrial frequency AC, extend the service life to track earthing or grounding means；
(3) contact area of the track earthing or grounding means of specific embodiment of the invention description in flexible brush and frictional disk, electricity
The high-frequency resistance on road declines to a great extent, and forms high-frequency current channel, is conducive to the high-frequency harmonic electric current stream in track electrical system
To rail, the electromagnetic interference of entire track electrical system can effectively reduce.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention is disclosed as above with preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, in the case where not departing from Spirit Essence of the invention and technical solution, all using in the methods and techniques of the disclosure above
Appearance makes many possible changes and modifications or equivalent example modified to equivalent change to technical solution of the present invention.Therefore,
Anything that does not depart from the technical scheme of the invention are made to the above embodiment any simple according to the technical essence of the invention
Modification, equivalent replacement, equivalence changes and modification still fall within the range of technical solution of the present invention protection.
Claims (18)
1. a kind of track earthing or grounding means, which is characterized in that the track earthing or grounding means (10) is connected to car body (6) and frictional disk
(4) between, for the electrical connection between the car body (6) and rail (8) to be connected to be grounded function, the track ground connection
Device (10) includes:
The rigid brush (3) of the car body (6), the rigidity brush (3) and the frictional disk are connected to by elastic mechanism (5)
(4) rigid contact；
The flexible brush (1) being connected with the rigid brush (3), the flexibility brush (1) further comprises being fixedly connected on institute
The pedestal (2) of rigid brush (3) is stated, and is connected to the brush wires (20) of the pedestal (2), the brush wires (20) are rubbed with described
Wipe disk (4) Elastic Contact；
The friction face contact of flexibility brush (1) and the frictional disk (4), the brush wires (20) of the flexibility brush (1) are deep
In the gap for entering the rubbing surface, form several small capacitances between the brush wires (20) and the frictional disk (4), by
The contact area of the flexibility brush (1) and the frictional disk (4) forms high-frequency current channel, reduces the flexible brush (1)
With the high-frequency resistance between the frictional disk (4), make rail (8) described in the high-frequency harmonic current direction in track electrical system,
To reduce the electromagnetic interference of entire track electrical system.
2. track earthing or grounding means according to claim 1, it is characterised in that: the brush wires (20) of the flexibility brush (1)
Contact bottom surface 0.5cm~2.5cm of the length beyond rigid brush (3) and the frictional disk (4).
3. track earthing or grounding means according to claim 1 or 2, it is characterised in that: the brush wires of the flexibility brush (1)
(20) any one in carbon fiber, graphite fibre or metallic fiber or two or more composite fibre are used；The metal is fine
Dimension is using any one two or more metal material including silver, aluminium or cathode copper.
4. track earthing or grounding means according to claim 3, it is characterised in that: the brush wires (20) of the flexibility brush (1)
In also mix weight percent be 1%~10% heat-resisting material.
5. according to claim 1,2 or 4 described in any item track earthing or grounding means, it is characterised in that: the pedestal (2) is using pure
Any one material in graphite plate, electrographite plate or metallic graphite carbon plate；When the pedestal (2) use metallic graphite carbon plate,
The metal adulterated in the pedestal (2) is any one or more metals including silver, aluminium, lead or copper.
6. track earthing or grounding means according to claim 5, it is characterised in that: the rigidity brush (3) uses cuboid knot
Structure, the length-width ratio of the rigidity brush (3) is between 3:1~5:1.
7. according to claim 1, the described in any item track earthing or grounding means in 2,4 or 6, it is characterised in that: the flexibility brush (1)
The arithmetic mean of instantaneous value deviation in profile gap is less than 3.2 μm between the rubbing surface of the frictional disk (4).
8. track earthing or grounding means according to claim 7, it is characterised in that: the flexibility brush (1) is symmetrically arranged at
The left and right sides of the rigidity brush (3).
9. track earthing or grounding means according to claim 7, it is characterised in that: flexibility brush (1) structure annular in shape is enclosed
It is around in the outside of the rigid brush (3).
10. track earthing or grounding means according to claim 8 or claim 9, it is characterised in that: it is described rigidity brush (3) width with
The width of the unilateral flexible brush (1) is approximately equal.
11. track earthing or grounding means according to claim 7, it is characterised in that: the rigidity brush (3) is symmetrically arranged at
The left and right sides of the flexibility brush (1).
12. track earthing or grounding means according to claim 7, it is characterised in that: rigidity brush (3) structure annular in shape is enclosed
It is around in the outside of the flexible brush (1).
13. track earthing or grounding means according to claim 11 or 12, it is characterised in that: the width of the flexibility brush (1)
It is approximately equal with the unilateral width of the rigid brush (3).
14. a kind of track earthing or grounding means, which is characterized in that the track earthing or grounding means (10) is connected to car body (6) and frictional disk
(4) between, for the electrical connection between the car body (6) and rail (8) to be connected to be grounded function, the track ground connection
Device (10) includes flexible brush (1), and the flexibility brush (1) further comprises:
It is connected to the pedestal (2) of the car body (6)；
And the brush wires (20) of the pedestal (2) are connected to, the brush wires (20) and the frictional disk (4) Elastic Contact；
The friction face contact of flexibility brush (1) and the frictional disk (4), the brush wires (20) of the flexibility brush (1) are deep
In the gap for entering the rubbing surface, form several small capacitances between the brush wires (20) and the frictional disk (4), by
The contact area of the flexibility brush (1) and the frictional disk (4) forms high-frequency current channel, reduces the flexible brush (1)
With the high-frequency resistance between the frictional disk (4), make rail (8) described in the high-frequency harmonic current direction in track electrical system,
To reduce the electromagnetic interference of entire track electrical system.
15. track earthing or grounding means according to claim 14, it is characterised in that: the brush wires of the flexibility brush (1)
(20) any one in carbon fiber, graphite fibre or metallic fiber or two or more composite fibre are used；The metal is fine
Dimension is using any one two or more metal material including silver, aluminium or cathode copper.
16. track earthing or grounding means according to claim 15, it is characterised in that: the brush wires of the flexibility brush (1)
(20) heat-resisting material that weight percent is 1%~10% is also mixed in.
17. track earthing or grounding means according to claim 16, it is characterised in that: the pedestal (2) uses pure graphite plate, electricity
Any one material in graphite plate or metallic graphite carbon plate；When the pedestal (2) use metallic graphite carbon plate, the pedestal
(2) metal adulterated in is any one or more metals including silver, aluminium, lead or copper.
18. the described in any item track earthing or grounding means in 4,15,16 or 17 according to claim 1, it is characterised in that: the flexible electrical
The arithmetic mean of instantaneous value deviation in profile gap between (1) and the rubbing surface of the frictional disk (4) is brushed less than 3.2 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710630692.1A CN107453060B (en) | 2017-07-28 | 2017-07-28 | A kind of track earthing or grounding means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710630692.1A CN107453060B (en) | 2017-07-28 | 2017-07-28 | A kind of track earthing or grounding means |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107453060A CN107453060A (en) | 2017-12-08 |
| CN107453060B true CN107453060B (en) | 2019-06-18 |
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ID=60489581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710630692.1A Active CN107453060B (en) | 2017-07-28 | 2017-07-28 | A kind of track earthing or grounding means |
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| Country | Link |
|---|---|
| CN (1) | CN107453060B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690639B (en) * | 2020-05-19 | 2022-09-23 | 中车唐山机车车辆有限公司 | Rail train's grounding system and rail train |
| CN112519590B (en) * | 2020-12-03 | 2022-07-05 | 北京磁浮交通发展有限公司 | Magnetic-levitation train and vehicle grounding system thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140017915A1 (en) * | 2012-07-12 | 2014-01-16 | Cap Technologies, Llc | Electrical grounding system for linearly travelling conductive materials |
| CN203813041U (en) * | 2014-03-12 | 2014-09-03 | 四川城际轨道交通材料有限责任公司 | Electric locomotive grounding device |
| CN204055782U (en) * | 2014-09-09 | 2014-12-31 | 四川城际轨道交通材料有限责任公司 | A kind of brush holder be applied in electric locomotive earthing device |
| CN204441684U (en) * | 2015-04-10 | 2015-07-01 | 四川城际轨道交通材料有限责任公司 | For the frictional disk of locomotive earthing device |
| CN105459835A (en) * | 2015-12-08 | 2016-04-06 | 上海洲跃生物科技有限公司 | Pantograph pan with flexible electric brush |
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2017
- 2017-07-28 CN CN201710630692.1A patent/CN107453060B/en active Active
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|---|---|
| CN107453060A (en) | 2017-12-08 |
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