CN101813140A - Heat dissipation method for friction surface of wet clutch of automobile gear box - Google Patents
Heat dissipation method for friction surface of wet clutch of automobile gear box Download PDFInfo
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- CN101813140A CN101813140A CN200910247270A CN200910247270A CN101813140A CN 101813140 A CN101813140 A CN 101813140A CN 200910247270 A CN200910247270 A CN 200910247270A CN 200910247270 A CN200910247270 A CN 200910247270A CN 101813140 A CN101813140 A CN 101813140A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000017525 heat dissipation Effects 0.000 title abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 27
- 239000011435 rock Substances 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000010349 pulsation Effects 0.000 abstract description 3
- 239000000498 cooling water Substances 0.000 abstract 1
- 239000002783 friction material Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 206010000234 Abortion spontaneous Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 208000015994 miscarriage Diseases 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 208000000995 spontaneous abortion Diseases 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The invention discloses a heat dissipation method for a friction surface of a wet clutch of an automobile gear box. The heat dissipation method is characterized in that cooling oil flows in through a flow-in port along the external diameter of a driven disk and then flows out from an oil flow-out port along the internal diameter of the driven disk through a cooling oil tank; the cooling oil rolls and flows in the cooling oil tank to be mixed fully so as to dissipate heat; the cooling water tank consists of a plurality of grid-shaped oil tanks connected in series; the grid-shaped oil tanks are alternately arranged with higher left and lower right or with lower left and higher right in an interlocking way along the radial direction; and the radial direction refers to the radius direction of the driven disk. The method has the advantages that: strong partial turbulent flow is produced in a shear layer of the oil flow at the connecting necking of two adjacent grid-shaped oil tanks so as to enhance the momentum exchange and the energy exchange of the oil flow; the reverse sliding of a driving disk and the driven disk on the friction surface produces the annular flow vertical to the flowing direction of the oil tank, so that the oil at a lower temperature constantly rolls to the friction boundary so as to increase the heat transfer temperature difference; and the high and low alternate arrangement of the cooling oil tanks and the depth variation roll the oil flow and enhance the pulsation of the main flow so as to improve the heat transfer effect.
Description
Technical field
The invention belongs to the automobile gearbox technical field, relate to the method for a kind of wet clutch heat radiation of rubbing surface when closed.
Background technique
Wet clutch is a kind of device that transmits and cut off moment of torsion that extensively adopts in the automobile gearbox, is made of the steel driving disc of motor one side and the driven disc of output shaft of gear-box one side, and driven disc has friction lining face.In starting on the vehicle slope, keep on the slope and introduce under the working condition such as sliding that rubs in order to improve property of automatic shft, cause excessive temperature rise because of the sliding heat that produces that rubs relatively between driving disc and the driven disc, to make friction material aging in advance again, cold oil decomposes, and finally causes the inefficacy of cooling effect decline and clutch.Therefore, the cooling of clutch friction face is all most important to its performance and long durability.
The cooling of friction surface of wet clutch mainly is to flow through rubbing surface by gear box oil heat is taken away.Yet clutch was in closed state when maximum heat produced, and oily stream is difficult to pass through, and only can permeate from the porous structure of friction material, can't satisfy the heat exchange requirement.Therefore, generally all designing on the clutch driven plate friction material has oil guide slot, makes cold oil flow through friction surface smoothly, and heat is taken away.The design quality of oil groove is very big to the cooling effect influence, the modal radial alignment shape (see figure 1) that is.Because temperature between the rubbing surface under the lasting sliding contact condition of wet clutch, to thermal equilibrium, its speed depends on the balance between the heat that cold oil is taken out of in fricative heat and the oil groove from the beginning contact friction.So above-mentioned common oil groove design, temperature gradient is along with oil groove radius (internal diameter is to external diameter) increases, so maximum temperature, usually occur in the external diameter of rubbing surface, limited the thermal capacity of clutch and the transmission of moment of torsion, influenced the clutch durability greatly, reliability and efficient.
Summary of the invention
The objective of the invention is: a kind of heat dissipating method of friction surface of wet clutch of automobile gear box is provided,, improves durability, reliability and the efficient of clutch to increase the clutch heat dissipation potential.
For achieving the above object, the technological scheme that adopts is: a kind of heat dissipating method of friction surface of wet clutch of automobile gear box, it is characterized in that: cold oil flows into through the oily outflow opening outflow of cooling oil groove to the driven disc internal diameter from the oily inflow entrance of driven disc external diameter, and cold oil rock and roll in described cooling oil groove flows and fully mixes heat radiation; Described cooling oil groove is for radially being composed in series the described radial direction that radially is meant driven disc by high right low, the left low right high indenting grid-like oil groove of arranging that replaces in a plurality of degree of depth left side.
Described grid-like oil groove be shaped as a kind of in square, rectangular, parallelogram, the trapezoidal and arbitrary quadrilateral, sideline, described grid-like oil groove flow direction both sides is straight line or curve.
The sideline that adjacent grid-like oil groove is vertical with the oil flow direction, the scope of being overlapping are 5%～95%.
High right low, the left low right height in a described grid-like oil groove degree of depth left side is that the center line that flows to cold oil is a benchmark, and is dark away from a side of center line, shallow near a side of center line.
Described cold oil flows into through the oily outflow opening outflow of cooling oil groove to internal diameter from the oily inflow entrance of external diameter, can follow any angle and path.
The invention has the beneficial effects as follows: in adjacent two short lines oil grooves connect the shear layer of oil stream in step downstream of reducing place, produce strong local turbulence, strengthened momentum and energy interchange in the oily stream, thereby improved heat transfer; The reverse slip of driving disc and driven disc causes the circulation vertical with the oil groove flow direction on the rubbing surface, and the oil of lower temperature is constantly rolled to the frictional interface place, has increased heat transfer temperature difference, thereby has improved heat transfer; The variation of high right low, the left low right high alternately arrangement in the left side of oil duct and the degree of depth makes the oil miscarriage give birth to rock and roll, has strengthened the pulsation of main flow, thereby has improved the mixing between the cold and hot oil, and then improved the durability of clutch, reliability and efficient.
Description of drawings
The invention will be further described for following Figure of description and embodiment.
Fig. 1 moves towards schematic representation for prior art cooling tank structure;
Fig. 2 moves towards schematic representation for the present invention cools off tank structure;
Fig. 3 is A-A section (left side the is low right high) structural representation of Fig. 2;
Fig. 4 is B-B section (left side the is high right low) structural representation of Fig. 2.
Among the figure: the 1-friction material; 2-cools off oil groove; 3-oil inflow entrance: 4-oil outflow opening; The grid-like oil groove of 5-.
Embodiment
Fig. 1～cooling oil groove shown in Figure 4 is taken from a section in the Automatic Transmission's lock-up Clutch annular friction sheet.Fig. 1 moves towards schematic representation for prior art cooling tank structure, and cooling oil groove 2 is a radial alignment shape, and maximum temperature usually occurs in the external diameter of rubbing surface, and radiating effect is bad.
Fig. 2～Fig. 4 shows schematic representation for the section shape that the present invention cools off tank structure trend and grid-like oil groove.As seen from the figure, a kind of heat dissipating method of friction surface of wet clutch of automobile gear box, it is characterized in that: cold oil flows into through oily outflow opening 4 outflows of cooling oil groove 2 to the driven disc internal diameter from the oily inflow entrance 3 of driven disc external diameter, and cold oil rock and roll in described cooling oil groove 2 flows and fully mixes heat radiation; Described cooling oil groove 2 is for radially being composed in series the described radial direction that radially is meant driven disc by high right low, the left low right high indenting grid-like oil groove of arranging 5 that replaces in a plurality of left sides.
Described grid-like oil groove 5 be shaped as a kind of in square, rectangular, parallelogram, the trapezoidal and arbitrary quadrilateral, sideline, grid-like oil groove 5 oil flow direction both sides is straight line or curve.The sideline scope of being overlapping that adjacent grid-like oil groove 5 is vertical with the oil flow direction is 5%～95%.
High right low, the left low right height in described grid-like oil groove 5 degree of depth left side is that the center line that flows to cold oil is a benchmark, and is dark away from a side of center line, shallow near a side of center line.
Described cold oil flows into through oily outflow opening 4 outflows of cooling oil groove 2 to internal diameter from the oily inflow entrance 3 of external diameter, can follow any angle and path.Its angle (as α, β angle among Fig. 2) that flows to center line and driven disc circle edge can be to less than any value between 180 ° greater than 0 °.
Cooling oil groove " rock and roll+radially square shape " pattern comprises a plurality of oil groove friction fields increasing high Turbulent Kinetic and to increase the pulsation of the main flow between the radial groove, to realize flow equilibrium and to reduce cavity flow and because centrifugal force produces the emptying phenomenon; The reverse slip of driving disc and driven disc causes the circulation vertical with the oil groove flow direction on the rubbing surface, the oil of lower temperature is constantly rolled to the frictional interface place, increased heat transfer temperature difference, thereby improved heat transfer, more reasonably a frictional surface temperature distribution and an increase clutch heat dissipation potential are provided.
Cooling oil groove of the present invention is applicable to the wet clutch that has slippage on lock-up clutch, the main clutch in the automatic mechanical transmission, double clutch or other any rubbing surface in the automatic transmission.
Claims (5)
1. the heat dissipating method of a friction surface of wet clutch of automobile gear box, it is characterized in that: cold oil flows into through oily outflow opening (4) outflow of cooling oil groove (2) to the driven disc internal diameter from the oily inflow entrance (3) of driven disc external diameter, and cold oil rock and roll in described cooling oil groove (2) flows and fully mixes heat radiation; Described cooling oil groove (2) is for radially being composed in series the described radial direction that radially is meant driven disc by high right low, the left low right high indenting grid-like oil groove of arranging (5) that replaces in a plurality of degree of depth left side.
2. according to the heat dissipating method of the described a kind of friction surface of wet clutch of automobile gear box of claim 1, it is characterized in that: described grid-like oil groove (5) be shaped as a kind of in square, rectangular, parallelogram, the trapezoidal and arbitrary quadrilateral, sideline, described grid-like oil groove (5) oil flow direction both sides is straight line or curve.
3. according to the heat dissipating method of the described a kind of friction surface of wet clutch of automobile gear box of claim 1, it is characterized in that: the sideline scope of being overlapping that adjacent described grid-like oil groove (5) is vertical with the oil flow direction is 5%～95%.
4. according to the heat dissipating method of the described a kind of friction surface of wet clutch of automobile gear box of claim 1, it is characterized in that: high right low, the left low right height in described grid-like oil groove (a 5) degree of depth left side is that the center line that flows to cold oil is a benchmark, side away from center line is dark, and is shallow near a side of center line.
5. according to the heat dissipating method of the described a kind of friction surface of wet clutch of automobile gear box of claim 1, it is characterized in that: described cold oil flows into through oily outflow opening (4) outflow of cooling oil groove (2) to internal diameter from the oily inflow entrance (3) of external diameter, can follow any angle and path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910247270A CN101813140B (en) | 2009-12-28 | 2009-12-28 | Heat dissipation method for friction surface of wet clutch of automobile gear box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910247270A CN101813140B (en) | 2009-12-28 | 2009-12-28 | Heat dissipation method for friction surface of wet clutch of automobile gear box |
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| CN101813140A true CN101813140A (en) | 2010-08-25 |
| CN101813140B CN101813140B (en) | 2012-10-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103890429A (en) * | 2011-09-19 | 2014-06-25 | 麦格纳动力系有限两合公司 | Clutch unit |
| CN110674554A (en) * | 2019-08-14 | 2020-01-10 | 江苏大学 | Design method of vehicle starting condition wet clutch heat dissipation system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4995500A (en) * | 1986-09-16 | 1991-02-26 | Borg-Warner Corporation | Groove pattern for high thermal capacity wet clutch |
| DE102006045456B4 (en) * | 2006-09-26 | 2014-07-24 | Borgwarner Inc. | Friction member for a frictionally-operating device and frictionally-operating device with such a friction member |
| CN201159250Y (en) * | 2008-01-16 | 2008-12-03 | 冯秋明 | Active friction plate of clutch |
-
2009
- 2009-12-28 CN CN200910247270A patent/CN101813140B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103890429A (en) * | 2011-09-19 | 2014-06-25 | 麦格纳动力系有限两合公司 | Clutch unit |
| CN103890429B (en) * | 2011-09-19 | 2016-03-23 | 麦格纳动力系有限两合公司 | Clutch unit |
| US9394951B2 (en) | 2011-09-19 | 2016-07-19 | Magna Powertrain Ag & Co Kg | Clutch unit |
| CN110674554A (en) * | 2019-08-14 | 2020-01-10 | 江苏大学 | Design method of vehicle starting condition wet clutch heat dissipation system |
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| CN101813140B (en) | 2012-10-03 |
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Effective date of registration: 20180418 Address after: 246100 Yue Shan Avenue, Huaining County Industrial Park, Anqing, Anhui Patentee after: Anhui Yi Jia Power Technology Co., Ltd. Address before: 1102 room 35, building 119, 210011, home road, Nanjing, Jiangsu Co-patentee before: Tao Wei Patentee before: Yuan Yiqing Co-patentee before: Du Guoping Co-patentee before: Zhang Ming Co-patentee before: Lv Kang |
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