CN102619950A - Hydrodynamic drive cooling system for forklift - Google Patents
Hydrodynamic drive cooling system for forklift Download PDFInfo
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- CN102619950A CN102619950A CN2012101044510A CN201210104451A CN102619950A CN 102619950 A CN102619950 A CN 102619950A CN 2012101044510 A CN2012101044510 A CN 2012101044510A CN 201210104451 A CN201210104451 A CN 201210104451A CN 102619950 A CN102619950 A CN 102619950A
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Abstract
The invention relates to a hydrodynamic drive cooling system for a forklift, which is capable of automatically adjusting cooling intensity to solve the problems of low drive effeminacy and cylinder crossing of hydrodynamic drive oil and engine coolant. The technical scheme includes that the hydrodynamic drive cooling system for the forklift comprises a hydrodynamic torque converter and an oil radiator and is characterized by further comprising a thermostat used for adjusting cooling intensity of the whole cooling system, an inlet of the thermostat is communicated with an oil outlet of the hydrodynamic torque converter, one outlet of the thermostat is communicated with an oil inlet of the oil radiator, and the other outlet of the thermostat and an oil outlet of the oil radiator are simultaneously connected to an oil inlet of the hydrodynamic torque converter. The hydrodynamic drive cooling system is applicable to forklifts in hydrodynamic drive.
Description
Technical field
The present invention relates to a kind of fork truck and use the hydraudynamic drive cooling system, mainly be applicable on the fork truck that adopts hydraudynamic drive.
Background technique
Fork truck industry at home at present; Be the working efficiency of raising fork truck and the travelling comfort of operation; The fork truck of 5t and the above tonnage of 5t has all adopted hydraudynamic drive basically; And the hydraudynamic drive cooling system has all been taked hydraudynamic drive oil cooler (oil looses) is built in the scheme in the engine tube ribbon type radiator, can have following these three problems so inevitably:
1, fork truck is just being started working during this period of time, because hydraulic transmission oil directly cools off through oil radiator, the hydraulic transmission oil temperature is low excessively.The viscosity of oil increases when the oil temperature is low, and surface friction drag increases, and the transmission efficiency of fluid torque converter descends.
The hydraulic transmission oil temperature was too high when 2, fork truck was worked under bad working environments.Because fluid torque converter oil looses be built in the hydroecium of engine radiator, receive the influence of factors such as space, the gentle radiator water chamber of engine water, the temperature of engine coolant generally is 85～95 ℃; And cooling liquid is the diffusing cooling medium of built-in oil, and interior oil is warm certainly more than 95 ℃ so oil looses, and the best effort of fluid torque converter oil temperature is 70～90 ℃; The oil temperature is too high for a long time for hydraulic transmission oil; Make the reduction of hydraulic transmission oil viscosity, lubricant film attenuation, quicken parts depreciation and interior leakage, transmission and lubricating function and descend, rubber seal was lost efficacy; Make transmission efficiency descend, drive unable, the hydraulic transmission oil liquid oxidation rotten, even causes mechanical accident.
3, hydraulic transmission oil and engine coolant are gone here and there the chamber each other.When built-in oil is dispersed in the using process when taking place to leak, hydraulic transmission oil and engine coolant will be gone here and there the chamber each other.When engine coolant gets into fluid torque converter, make the reduction of hydraulic transmission oil viscosity, lubricant film attenuation, quicken parts depreciation, even cause fluid torque converter to scrap.
Summary of the invention
The technical problem that the present invention will solve is: the problem to above-mentioned existence provides a kind of fork truck that can regulate intensity of cooling automatically to use the hydraudynamic drive cooling system; Low to solve in the existing technology transmission efficiency, hydraulic transmission oil and engine coolant are gone here and there the problem of cylinder each other.
The technological scheme that the present invention adopted is: fork truck is used the hydraudynamic drive cooling system; Comprise that fluid torque converter and oil loose; It is characterized in that: said cooling system comprises that also one is used to regulate the thermostat of whole cooling system intensity of cooling; The import of this thermostat is communicated with the fluid torque converter oil outlet, and one of them outlet is communicated with the diffusing filler opening of oil, and the oil outlet that another outlet and oil loose is connected to the filler opening of fluid torque converter simultaneously.
Said thermostat comprises the housing that has a filler opening and two oil outlets, and two oil outlets are staggeredly arranged, wherein with oil oil outlet that filler opening the is communicated with filler opening near housing that looses; Installation can be along the hollow tube-shape piston of its axis slip in the said housing, and this piston closely contacts with inner walls, and its axis and filler opening dead in line; Be shaped on a ring-shaped step perpendicular to its axis in the said piston piston is divided into two-part, offer the through hole that is used to be communicated with filler opening and oil outlet on that part of piston side wall near filler opening; The airtight temperature sensor of coaxial installation one on the said step, the inner solid wax of filling of temperature sensor, simultaneously on the housing, with the filler opening opposing end faces push rod is installed, this push rod one end stretches in the temperature sensor, and through the seal ring sealing; Coaxial arrangement spring in the said piston, this both ends of the spring withstands the inwall and the step of housing filler opening end respectively.
Said oil looses and is external plate fin type radiator, and it is by one group of stacked being welded of sandwich structure.
Said sandwich structure comprises two parallel dividing plates, Wavelike finned between two dividing plates, and the strip of paper used for sealing that is positioned at the fin two ends.
The invention has the beneficial effects as follows: the present invention increases by a thermostat in whole cooling system, the import of this thermostat is communicated with the fluid torque converter oil outlet, and one of them outlet is connected directly to the filler opening of fluid torque converter; Another outlet is then loose through oil and is connected to the filler opening of fluid torque converter; Thermostat can change the route that circulates of hydraulic transmission oil automatically according to the height of hydraulic transmission oil temperature, and to regulate the intensity of cooling of cooling system, the assurance fluid torque converter is worked in suitable oily temperature scope; It is low excessively not only to have solved when just having started working the hydraudynamic drive oil temperature; The problem that causes transmission efficiency to reduce, and it is too high to have solved under the mal-condition hydraudynamic drive oil temperature, quickens parts depreciation and interior leakage; Problems such as transmission and lubricating function decline, rubber seal inefficacy, transmission efficiency descend, driving is unable, the hydraulic transmission oil liquid oxidation is rotten; Improve the efficient of hydraudynamic drive greatly, reduced the rate of fault of hydraudynamic drive, also prolonged the life-span of fluid torque converter simultaneously.In addition, the present invention oil looses for external aluminum plate-fin type oil looses, and has solved hydraulic transmission oil and engine coolant in the existing technology and has gone here and there the problem of cylinder each other; And its heat diffusion area is big, and radiating effect is better, and the shape size does not receive the influence of hydroecium space and heat eliminating medium.
Description of drawings
Fig. 1-Fig. 3 is the oil circulation schematic representation under three kinds of different conditions of the present invention.
Fig. 4 is the structural drawing of thermostat among the present invention.
Fig. 5 is the structural representation that oil looses among the present invention.
Embodiment
Like Fig. 1-shown in Figure 3; The present embodiment cooling system comprises that fluid torque converter 1, thermostat 2 and oil loose 3; Wherein the oil outlet of fluid torque converter 1 is communicated with the import of thermostat 2; An outlet of thermostat 2 is communicated with oily diffusing 3 filler opening, and the oil outlet of another outlet and oil diffusing 3 is connected to the filler opening of fluid torque converter 1 simultaneously; Thereby the circulate circuit of hydraulic transmission oil in this routine cooling system has two; Wherein the hydraulic transmission oil for fluid torque converter 1 output directly is back to fluid torque converter 1 behind thermostat 2; Be referred to as short circle (when the oil temperature was low, transmission oil was without oily cold scattering circulation but); Another is back to fluid torque converter 1 for hydraulic transmission oil of fluid torque converter 1 output looses through thermostat 2 and oil successively after 3, is referred to as major cycle (oil is warm when high, transmission oil must through oily cold scattering circulation but); What said thermostat 2 can change hydraulic transmission oil automatically according to the height of hydraulic transmission oil temperature circulates route (major cycle, short circle or big short circle are worked simultaneously); To regulate the heat dissipation potential of cooling system, assurance fluid torque converter 1 is worked in suitable oily temperature scope.
As shown in Figure 4; Said thermostat 2 comprises the housing 2-1 that has a filler opening 2-9 and two oil outlets (oil outlet I 2-10 and oil outlet II 2-11); And two oil outlets are staggeredly arranged; The oil outlet (for oil outlet I 2-10) that wherein is communicated with diffusing 3 filler openings of oil is near the filler opening 2-9 of housing 2-1, and another oil outlet (being oil outlet II 2-11) is then arranged away from the filler opening 2-9 of housing 2-1.Installation can be along the hollow tube-shape piston 2-2 of its axis slip in the said housing 2-1, and this piston closely contacts with housing 2-1 inwall, and the dead in line of its axis and filler opening 2-9; Be shaped on a ring-shaped step 2-3 perpendicular to its axis one in the said piston 2-2 piston 2-2 is divided into two-part; Offer through hole 2-4 on that part of piston 2-2 sidewall near filler opening 2-9; Utilize the slip of piston 2-2, can realize filler opening 2-9 and oil outlet I 2-10 be communicated with or filler opening 2-9 and oil outlet II 2-11 be communicated with or filler opening 2-9 is communicated with oil outlet I 2-10 and oil outlet II 2-11 the time; Said step 2-3 goes up the airtight temperature sensor 2-5 of coaxial installation one, be tightly connected between this temperature sensor and the step 2-3, and the one of which end stretches in the cavity near that part of piston 2-2 of filler opening 2-9, and it is warm to be used to respond to oil; The inner solid wax 2-6 that fills of said temperature sensor 2-5, housing 2-1 goes up, with filler opening 2-9 opposing end faces push rod 2-7 is installed simultaneously, and this push rod one end stretches in the temperature sensor 2-5, and through the seal ring sealing; Coaxial arrangement spring 2-8 in the said piston 2-2, this both ends of the spring withstand the inwall and the step 2-3 of housing 2-1 filler opening 2-9 end respectively, are used to realize resetting of piston 2-2.
Said oil diffusing 3 is the aluminum plate fin type radiator of external parallel connection, and it is by one group of stacked being welded of sandwich structure, and oil pipe then is arranged between adjacent each sandwich structure; As shown in Figure 5, said sandwich structure comprises two parallel dividing plate 4-1, the Wavelike finned 4-2 between two dividing plate 4-1, and the strip of paper used for sealing 4-3 that is positioned at fin 4-2 two ends.Plate-fin heat exchanger not only has characteristics such as heat transfer efficiency height, compact dimensions, intensity are high, adaptability is strong, and has two subsurfaces of expansion, makes that its heat diffusion area is more a lot of greatly than the heat diffusion area of pipe racks, and radiating effect is also better.The diffusing 3 external influences that do not receive hydroecium space and heat eliminating medium of oil, the size that can mate oil diffusing 3 according to the heat radiation power of torque-converters.In actual the use, oil diffusing 3 and engine water tank, absolutely empty intercooler are arranged on the same vertical plane.
The working principle of present embodiment is following: when fork truck had just been started working, the hydraulic transmission oil temperature was lower than 70 ℃, and hydraulic transmission oil carries out the mobile (see figure 1) of short circle; Be transmission oil under the effect of torque-converters oil pump, through the filler opening 2-9 of fluid torque converter 1 oil outlet to thermostat 2, thermostat 2 is a waxtype thermostat; The interior exquisite paraffin (solid wax 2-6, down together) of temperature sensor 2-5 this moment is solid-state, and piston 2-2 has sealed the oil outlet I 2-10 of thermostat 2 under the effect of spring 2-8; Transmission oil looses 3 without oil; But via through holes 2-4 and oil outlet II 2-11 directly return fluid torque converter 1 successively, form short circle, thereby the hydraudynamic drive oil temperature is raise.
In the time of in the hydraulic transmission oil temperature rises to 70～80 ℃ of scopes; Paraffin in the temperature sensor 2-5 begins the part thawing and becomes liquid; Volume increases thereupon and compresses push rod 2-7 promotion piston 2-2 to the slip of filler opening 2-9 end (this moment, spring 2-8 was compressed); Make the oil outlet I 2-10 and the oil outlet II 2-11 of thermostat 2 be in the half-open state (see figure 2) of closing simultaneously; This moment, a part of hydraulic transmission oil got into fluid torque converter 1 through oil outlet I 2-10 again after oil looses 3 coolings, and another part hydraulic transmission oil directly returns fluid torque converter 1 behind oil outlet II 2-11, and major cycle at this moment and short circle carry out simultaneously.
When fluid torque converter 1 oily temperature is higher than 80 ℃; Paraffin in the temperature sensor 2-5 all is melted into liquid; Volume further increases and compresses push rod 2-7 promotion piston 2-2 and continues to slide to filler opening 2-9 end, and oil outlet II 2-11 is closed, and oil outlet I 2-10 all opens (see figure 3); This moment, hydraulic transmission oil got into fluid torque converter 1 through oil outlet I 2-10 again after oil looses 3 coolings, formed major cycle.
This system is trial assembly on my company's 25 ton forklifts; Test shows receives extraordinary cooling effect; Hydraulic transmission oil is worked in 70～90 ℃ of scopes all the time during fork truck work; Improve the efficient of hydraudynamic drive greatly, reduced the rate of fault of hydraudynamic drive, also prolonged the life-span of torque-converters simultaneously.
Claims (4)
1. a fork truck is used the hydraudynamic drive cooling system; Comprise fluid torque converter (1) and oil diffusing (3); It is characterized in that: said cooling system comprises that also one is used to regulate the thermostat (2) of whole cooling system intensity of cooling; The import of this thermostat is communicated with fluid torque converter (1) oil outlet, and one of them outlet is communicated with oily (3) filler opening that looses, and the oil outlet of another outlet and oil diffusing (3) is connected to the filler opening of fluid torque converter (1) simultaneously.
2. fork truck according to claim 1 is used the hydraudynamic drive cooling system; It is characterized in that: said thermostat (2) comprises the housing (2-1) that has a filler opening and two oil outlets; And two oil outlets are staggeredly arranged, and the oil outlet that wherein is communicated with diffusing (3) filler opening of oil is near the filler opening of housing (2-1); The interior installation of said housing (2-1) can be along the hollow tube-shape piston (2-2) of its axis slip, and this piston closely contacts with housing (2-1) inwall, and its axis and filler opening dead in line; Be shaped on a ring-shaped step (2-3) perpendicular to its axis in the said piston (2-2) piston (2-2) is divided into two-part, offer the through hole (2-4) that is used to be communicated with filler opening and oil outlet on that part of piston (2-2) sidewall near filler opening; Said step (2-3) is gone up the airtight temperature sensor (2-5) of coaxial installation one; The inner solid wax (2-6) of filling of temperature sensor (2-5); Housing (2-1) is gone up, with the filler opening opposing end faces push rod (2-7) is installed simultaneously; This push rod one end stretches in the temperature sensor (2-5), and through the seal ring sealing; The interior coaxial arrangement spring of said piston (2-2) (2-8), this both ends of the spring withstand the inwall and the step (2-3) of housing (2-1) filler opening end respectively.
3. fork truck according to claim 1 and 2 is used the hydraudynamic drive cooling system, it is characterized in that: said oil diffusing (3) is external plate fin type radiator, and it is by one group of stacked being welded of sandwich structure.
4. fork truck according to claim 3 is used the hydraudynamic drive cooling system; It is characterized in that: said sandwich structure comprises two parallel dividing plates (4-1), is positioned at Wavelike finned (4-2) between two dividing plates (4-1), and the strip of paper used for sealing (4-3) that is positioned at fin (4-2) two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210104451.0A CN102619950B (en) | 2012-04-11 | 2012-04-11 | Hydrodynamic drive cooling system for forklift |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210104451.0A CN102619950B (en) | 2012-04-11 | 2012-04-11 | Hydrodynamic drive cooling system for forklift |
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| Publication Number | Publication Date |
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| CN102619950A true CN102619950A (en) | 2012-08-01 |
| CN102619950B CN102619950B (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210104451.0A Active CN102619950B (en) | 2012-04-11 | 2012-04-11 | Hydrodynamic drive cooling system for forklift |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923613A (en) * | 2012-10-23 | 2013-02-13 | 杭叉集团股份有限公司 | Heat radiation package for operation forklift in container |
| CN114172310A (en) * | 2021-12-06 | 2022-03-11 | 安徽维德电源有限公司 | Heat dissipation structure for forklift integrated power assembly and mounting method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07259971A (en) * | 1994-03-25 | 1995-10-13 | Nissan Diesel Motor Co Ltd | Torque converter for construction machine and oil cooling device for hydraulic equipment |
| EP0985808A2 (en) * | 1998-09-07 | 2000-03-15 | KUZE, Yoshikazu | Electronic control cooling system of automotive engine for prevention of the global warming |
| CN1529376A (en) * | 2003-10-10 | 2004-09-15 | 清华大学 | Two-way circulating controlled fuel cell heat management system |
| CN201833871U (en) * | 2010-09-15 | 2011-05-18 | 浙江杭叉工程机械集团股份有限公司 | Cooling system applied on diesel fork lift truck |
| CN202545733U (en) * | 2012-04-11 | 2012-11-21 | 杭叉集团股份有限公司 | Hydraulic transmission cooling system for forklift |
-
2012
- 2012-04-11 CN CN201210104451.0A patent/CN102619950B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07259971A (en) * | 1994-03-25 | 1995-10-13 | Nissan Diesel Motor Co Ltd | Torque converter for construction machine and oil cooling device for hydraulic equipment |
| EP0985808A2 (en) * | 1998-09-07 | 2000-03-15 | KUZE, Yoshikazu | Electronic control cooling system of automotive engine for prevention of the global warming |
| CN1529376A (en) * | 2003-10-10 | 2004-09-15 | 清华大学 | Two-way circulating controlled fuel cell heat management system |
| CN201833871U (en) * | 2010-09-15 | 2011-05-18 | 浙江杭叉工程机械集团股份有限公司 | Cooling system applied on diesel fork lift truck |
| CN202545733U (en) * | 2012-04-11 | 2012-11-21 | 杭叉集团股份有限公司 | Hydraulic transmission cooling system for forklift |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102923613A (en) * | 2012-10-23 | 2013-02-13 | 杭叉集团股份有限公司 | Heat radiation package for operation forklift in container |
| CN114172310A (en) * | 2021-12-06 | 2022-03-11 | 安徽维德电源有限公司 | Heat dissipation structure for forklift integrated power assembly and mounting method |
| CN114172310B (en) * | 2021-12-06 | 2022-07-19 | 安徽维德电源有限公司 | Heat dissipation structure for forklift integrated power assembly and mounting method |
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| CN102619950B (en) | 2014-08-13 |
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