CN111120536A

CN111120536A - A friction plate that can reduce the effect of temperature rise

Info

Publication number: CN111120536A
Application number: CN202010062443.9A
Authority: CN
Inventors: 龚丽红; 朱茂桃
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-05-08

Abstract

A friction plate capable of reducing temperature rise effect relates to the field of tribology, and comprises a friction base body, wherein base plate parts are uniformly arranged on the friction base body, and a second oil groove is formed between every two adjacent base plate parts; friction pieces are uniformly distributed on the substrate part, and a first oil groove is formed between every two adjacent friction pieces; through setting up the friction part of class pentagon, make the regional angle of first oil groove oil feed that constitutes between the friction part be less than first oil groove and go out oil regional angle, first oil groove regional opening angle is progressively increased to footpath department by internal diameter department promptly, make cooling fluid can be fast by friction disc internal runoff to external diameter, accelerate the circulation speed of fluid, make the oil film bearing capacity in the friction disc clearance strengthen, the oil film coverage rate has been reduced, make the friction disc separate more easily, thereby the belt of clutch is arranged the torque has been reduced, strengthen the heat-sinking capability, promote wet clutch's comprehensive properties.

Description

Friction plate capable of reducing temperature rise effect

Technical Field

The invention relates to the technical field of automobile clutches, in particular to a friction plate capable of reducing temperature rise effect and an automobile clutch.

Background

The wet clutch is one of the key parts on the automobile, and the heat dissipation capacity of the friction plate directly influences the service life and the working performance of the clutch. Meanwhile, with the continuous progress of science and technology, higher requirements are placed on low fuel consumption of an automobile, when the wet clutch is in an idle running state, an oil film is formed in an oil groove area due to the existence of oil, and the relative rotation of the friction plate and the counter plate can generate a corresponding shearing action on the oil film in the oil groove area, so that a certain torque is generated through the shearing action of the oil film, and the torque is a belt-type torque. The belt exhaust torque is an inherent defect of the wet clutch, and the existence of the torque not only reduces the transmission efficiency of the wet clutch, but also causes the abrasion of the clutch and the temperature rise of lubricating oil, thereby bringing great influence to the overall performance of the automobile. Along with the improvement of the speed difference of the clutch, the groove design of the friction plate is of great importance, and the belt-row torque, the power loss and the collision friction between the friction plates of the clutch are greatly influenced.

Disclosure of Invention

In order to overcome the structural and functional defects of the conventional clutch friction plate, the invention provides a wear-resistant wet clutch friction plate, which is designed in structure, so that the heat dissipation condition of a wet clutch friction pair is improved, the temperature rise effect of the wet clutch friction plate in the working process is reduced, the wear degree of the wet clutch friction plate is reduced, the belt discharge phenomenon in an idle running state is reduced, the working performance and the energy-saving effect of the wet clutch are improved, and the service life of the wet clutch friction plate is prolonged.

The invention realizes the technical purpose by the following technical means:

a friction plate capable of reducing temperature rise effect comprises a friction base body, wherein base plate parts are uniformly arranged on the friction base body, and a second oil groove is formed between every two adjacent base plate parts; friction pieces are evenly distributed on the substrate part, and a first oil groove is formed between every two adjacent friction pieces.

Furthermore, the friction pieces are of a pentagon-like structure, and a first oil groove formed between every two adjacent friction pieces is of a Y-shaped structure.

Furthermore, a plurality of microgrooves are formed in the friction piece along the radial direction, and wear-resistant particles are arranged in the microgrooves through a sintering process.

Wear-resistant particles are arranged in the fine grooves and are arranged in the fine grooves through a sintering process. The friction piece is provided with the microgrooves, so that the grooves can be filled to a higher degree even when the rotation speed of the friction plate is higher, the temperature of the friction plate in the wet clutch can be reduced, and meanwhile, when the friction plate is static, the microgrooves can improve the circulation resistance, so that cooling oil can overflow smoothly, and the heat capacity of the cooling oil is reduced; on the other hand, the wear-resistant particles are arranged in the microgrooves, so that the friction coefficient can be compensated after the friction piece is worn to a certain degree, the working performance and the energy-saving effect of the wet clutch are improved, and the service life of the wet clutch is prolonged.

Further, the second oil groove includes radial face of second oil groove and second oil groove axial face, and the radial face of first oil groove sets up on the radial direction of friction base member, and second oil groove axial face symmetry sets up in the both sides of the radial face of first oil groove, and second oil groove axial face is the acute angle with the contained angle of friction base member at the circumferencial direction.

The included angle of the axial surface of the second oil groove and the friction base body in the circumferential direction is an acute angle, and compared with the arrangement of a pure radial straight oil groove, the included angle of the second oil groove and the friction base body can enable cooling oil to flow through a larger surface, so that the cooling oil can rapidly flow through the oil groove, and the cooling effect of the friction plate is improved.

Further, the friction matrix is of a ring-shaped structure.

Further, first oil groove includes that first oil groove oil feed is regional and first oil groove goes out oil zone, first oil groove oil feed is regional to be close to friction base member central point and puts, and the opening angle in first oil groove oil feed region is less than the opening angle in first oil groove oil zone.

The opening angle in the oil inlet area of the first oil groove is smaller than the opening angle in the oil outlet area of the first oil groove, so that the oil passing capacity of the oil groove is enhanced, the oil film coverage rate is reduced, and the belt-type torque of the clutch is reduced.

Further, the limit in the friction part includes the interior limit of friction part, friction part outside and friction part, the central point that is close to the friction base member in the friction part puts, two limit one end is connected in with the friction part in the friction part, the other end and two the similar pentagon structure of constitution is connected to the friction part outside.

Furthermore, the included angle between the axial surface of the second oil groove and the circumferential direction of the friction base body is 30-45 degrees.

Further, the width of the fine groove is 10 to 500 μm, and the depth is 10 to 200 μm.

An automobile clutch is provided with the friction plate.

The technical scheme of the invention has the following effects:

1. according to the friction plate of the wet clutch, the pentagonal friction pieces are arranged, so that the angle of the oil inlet area of the first oil groove formed among the friction pieces is smaller than the angle of the oil outlet area of the first oil groove, namely the angle of the opening of the area of the first oil groove is gradually increased from the inner diameter to the outer diameter, cooling oil can quickly flow from the inside to the outer diameter of the friction plate, the flowing speed of the oil is accelerated, the oil film bearing capacity in the gap of the friction plate is increased, the oil film coverage rate is reduced, the friction plate is more easily separated, the belt-row torque of the clutch is reduced, the heat dissipation capacity is enhanced, and the comprehensive performance of the wet clutch is improved.

2. Compare with arranging of pure radial straight oil groove, become certain inclination's second oil groove through setting up with the friction surface for cooling fluid can flow through bigger friction disc surface, has strengthened the radiating effect of friction disc, has certain difference in height simultaneously between second oil groove and the first oil groove, has strengthened the axial pressure difference flow of cooling fluid, makes the oil extraction that wet clutch gearbox can be faster, can play better cooling effect to the friction pair.

3. Through set up wear-resisting granule in the fine groove that sets up on the friction spare, can be so that carry out coefficient of friction's compensation after the friction spare has certain degree of wearing and tearing, avoid the friction spare to appear making the moment of transmission between the friction pair big fluctuation appear after wearing and tearing for the moment of transmission between the friction pair is more stable, has improved wet clutch's working property and energy-conserving effect, prolongs its life.

Drawings

FIG. 1 is a schematic structural diagram of a friction plate capable of reducing a temperature rise effect according to an embodiment of the present invention;

FIG. 2 is a partial front elevational view of the friction plate of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic view of the second sump according to FIG. 1 of the present invention;

FIG. 4 is a schematic structural view of an angle between an axial surface of a second oil groove and a friction base according to the present invention;

FIG. 5 is a schematic structural view of the friction member of FIG. 1 in accordance with the present invention;

fig. 6 is a partially enlarged schematic view of fig. 5.

Reference numerals:

1-a friction matrix; 2-a substrate portion; 3-a friction member; 4-a first oil sump; 5-a second oil groove; (ii) a 6-microgrooves; 7-wear resistant particles; 301-friction member inner edge; 302-friction member outer edge; 303-friction member middle edge; 401 — first sump in area; 402-first sump oil area; 501-second oil groove radial surface; 502, 503-second sump axial face.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following first describes in detail embodiments according to the present invention with reference to the accompanying drawings

With reference to fig. 1 to 6, a friction plate according to an embodiment of the present invention includes a friction substrate 1, wherein a front surface and a back surface of the friction substrate 1 are respectively a first friction surface and a second friction surface opposite to the first friction surface; the first friction surface and the second friction surface are provided with a substrate part 2, and the substrate part 2 is provided with a friction piece 3 and a first oil groove 4; a plurality of substrate parts 2 are arranged, and the second oil grooves 5 are arranged between the adjacent substrate parts 2; the friction pieces 3 are uniformly distributed on the substrate part 2; the first oil groove 4 is formed by adjacent friction members 3. The friction piece 3 is provided with a plurality of micro-grooves 6 extending along the radial direction, wherein a plurality of wear-resistant particles 7 are arranged in the micro-grooves 6 through a sintering process.

Since the first friction surface and the second friction surface are symmetrical with respect to the friction base 1, the structure thereof will be described by taking the first friction surface as an example. As shown in fig. 2, the friction base 1 has a circular ring shape and has an inner diameter and an outer diameter. The first friction surface is composed of a substrate part 2, a friction piece 3, a first oil groove 4 and a second oil groove 5. A plurality of friction pieces 3 equipartitions set up on base plate portion 2, just friction piece 3 is the pentagon-like, and be close to the one side of friction base member 1 internal diameter and the internal diameter coincidence of friction base member 1, from this setting, make the opening angle of the oil feed region 401 of first oil groove 4 of constituteing by adjacent friction piece 3 be less than the opening angle of the regional 402 of producing oil of first oil groove 4, the opening angle of the shared region of first oil groove 4 is progressively increased to the external diameter department of friction base member 1 by the internal diameter department of friction base member 1 promptly, make cooling fluid can be fast by friction disc internal runoff to external diameter, accelerate the circulation speed of fluid, make the oil film bearing capacity in the friction disc clearance strengthen, the oil film coverage rate has been reduced, make the friction disc separate more easily, thereby the belt discharge torque of clutch has been reduced, the reinforcing heat-sinking capability, promote wet clutch's comprehensive properties.

Referring to fig. 3 and 4, the second oil groove 5 is disposed between adjacent substrate portions 2, and the second oil groove 5 is composed of a radial surface 501 and

circumferential surfaces

502 and 503. The radial surface 501 is formed by radially intersecting the second oil groove 5 and the friction plate, the

axial surfaces

502 and 503 are formed by axially intersecting the second oil groove 5 and the friction plate, and included angles γ formed by intersecting the

axial surfaces

502 and 503 and the first friction surface or the second friction surface are acute angles and equal to each other. Compared with the arrangement of pure radial straight oil grooves, the second oil groove 5 which forms a certain inclination angle gamma with the friction surface is arranged, so that cooling oil can flow through the surface of a larger friction plate, the heat dissipation efficiency of the friction plate is enhanced, the heat dissipation performance is good, and the service life of the friction plate is long. Meanwhile, a certain height difference exists between the second oil groove 5 and the first oil groove 4, and axial pressure difference flowing of cooling oil is enhanced, so that oil can be discharged from the wet clutch gearbox more quickly, and a better cooling effect can be achieved on a friction pair. Optionally, in some embodiments, the included angle γ is set at a value of 30 ° to 45 °.

As shown in fig. 5, the friction member 3 is composed of three parts: an inner edge 301 coinciding with the inner diameter of the friction matrix, an outer edge 302 near the outer diameter of the friction matrix 1 and a remaining middle edge 303. The friction member 3 is provided with a plurality of fine grooves 6 uniformly distributed along the radial direction, i.e. a plurality of fine grooves 6 extend from the inner edge 301 to the outer edge 302 along the radial direction. Because the friction disc can make the coolant oil temperature between the friction pair rise rapidly and form a plurality of foggy coolant oil granule of oil under the higher circumstances of rotational speed, through setting up little slot 6 for also can keep filling to a higher degree under the higher circumstances of friction disc rotational speed, this can make the friction disc temperature among the wet clutch reduce, and when the friction disc was static, the fine slot can improve the circulation resistance and make coolant oil spill over smoothly simultaneously, reduces its heat capacity. Alternatively, in some embodiments, the microgrooves 6 on the same friction member 3 may extend circumferentially from one middle edge 303 to the other middle edge 303. Alternatively, the width of the fine grooves 6 may be set to 10 μm to 500 μm and the depth of the fine grooves 6 may be set to 10 μm to 200 μm in addition to the securing of the friction area required for the friction material 3, thereby providing a small influence on the reduction of the friction area on the friction surface of the friction material 3, and thus, sufficient heat resistance and durability of the wet clutch friction plate can be secured.

Referring to fig. 6, a plurality of wear resistant particles 7 are arranged in the microgrooves 6 through a sintering process. Through set up wear-resisting granule 7 in the microgroove 6 that sets up on friction spare 3, can be so that carry out coefficient of friction's compensation after friction spare 3 has the wearing and tearing of certain degree, avoid making the moment of transmission between the friction pair appear big fluctuation after wearing and tearing appear in friction spare 3 to make the moment of transmission between the friction pair more stable, improve wet clutch's working property and energy-conserving effect, prolong its life. Alternatively, in some embodiments, the material of the wear resistant particles 7 may be ceramic particles.

Therefore, the friction plate of the embodiment forms the first oil groove through the friction piece with the oil storage capacity, and the opening angle of the oil groove close to the center of the base body is smaller than the opening angle of the center far away from the friction base body 1, so that the oil passing capacity of the oil groove is enhanced, the oil film coverage rate is reduced, and the belt discharge torque of the clutch is reduced. The second oil groove which forms a certain acute angle with the friction surface is arranged, so that cooling oil can flow through the surface of the friction plate, and the heat dissipation effect of the friction plate is enhanced. Meanwhile, the wear-resistant particles are arranged in the microgrooves arranged on the friction piece through a sintering process, so that the friction piece is subjected to friction coefficient compensation after being worn to a certain degree, the torque transmitted between the friction pairs is more stable, the working efficiency of the wet clutch is improved, and the service life of the wet clutch is prolonged.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.

Claims

1. a friction plate that can reduce the temperature rise effect, comprising a friction base (1), characterized in that the front and back surfaces of the friction base (1) are provided with a substrate portion (2), adjacent substrates A second oil groove (5) is arranged between the parts (2); friction members (3) are uniformly distributed on the base plate part (2), and a first oil groove (4) is formed between adjacent friction parts (3).

2 . The friction plate capable of reducing the temperature rise effect according to claim 1 , wherein the friction member ( 3 ) is a pentagonal-like structure, and the first friction member ( 3 ) is formed between adjacent friction members ( 3 ). 3 . The oil tank (4) has a Y-shaped structure.

3. The friction plate capable of reducing the temperature rise effect according to any one of claims 1 or 2, wherein the friction member (3) is provided with several fine grooves (6) along the radial direction, and several Wear-resistant particles (7) are arranged in the fine grooves (6) through a sintering process.

4. The friction plate capable of reducing the temperature rise effect according to claim 1, wherein the second oil groove (5) comprises a second oil groove radial surface (501) and a second oil groove axial surface (502), The second oil groove radial surface (501) is arranged in the radial direction of the friction base (1), and the second oil groove axial surface (502) is symmetrically arranged on both sides of the first oil groove radial surface (501). (1) In the circumferential direction, the included angle between the axial surface (502) of the second oil groove and the friction base (1) is an acute angle.

5 . The friction plate capable of reducing the temperature rise effect according to claim 1 , wherein the friction substrate ( 1 ) is a ring-shaped structure. 6 .

6. The friction plate capable of reducing the temperature rise effect according to claim 2, wherein the first oil groove (4) comprises an oil inlet area (401) of the first oil groove and an oil outlet area (402) of the first oil groove , the oil inlet area (401) of the first oil tank is close to the center of the friction base (1), and the opening angle of the oil inlet area (401) of the first oil tank is smaller than the opening angle of the oil outlet area (402) of the first oil tank.

7. The friction plate capable of reducing the temperature rise effect according to any one of claims 1 or 2, wherein the friction member (3) comprises an inner edge (301) of the friction member, an outer edge (302) of the friction member and a The middle edge (303) of the friction piece, the inner edge (301) of the friction piece is close to the center of the friction base (1), and one end of the middle edge (303) of the two friction pieces is respectively connected with the inner edge (301) of the friction piece. The two ends are connected, and the other end is connected with the outer edges (302) of the two friction members to form a pentagonal-like structure.

8 . The friction plate capable of reducing the temperature rise effect according to claim 4 , wherein the angle between the axial surface of the second oil groove ( 502 ) and the circumferential direction of the friction base ( 1 ) is 30° to 45° 8 . .

9 . The friction plate capable of reducing the temperature rise effect according to claim 3 , wherein the fine grooves ( 6 ) have a width of 10 μm to 500 μm and a depth of 10 μm to 200 μm. 10 .

10. An automobile clutch, characterized in that, the automobile clutch is provided with the friction plates protected by claims 1-6 and 7-9, which can reduce the temperature rise effect.