CN201836149U - Hydraulic closed loop system - Google Patents
Hydraulic closed loop system Download PDFInfo
- Publication number
- CN201836149U CN201836149U CN2010205728474U CN201020572847U CN201836149U CN 201836149 U CN201836149 U CN 201836149U CN 2010205728474 U CN2010205728474 U CN 2010205728474U CN 201020572847 U CN201020572847 U CN 201020572847U CN 201836149 U CN201836149 U CN 201836149U
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- pump
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Abstract
The utility model discloses a hydraulic closed loop system, which comprises a closed motor (1), a closed oil pump (2) and an oil tank (3). A pressure oil port of the closed oil pump (2) is connected with an oil inlet of the closed motor (1), an oil suction port of the closed oil pump (2) is connected with an oil return port of the closed motor (1), and an oil replenishing port of the closed oil pump (2) is connected with the oil tank (3). The hydraulic closed loop system is characterized by further comprising cooling equipment. The hydraulic closed loop system not only can generate excellent cooling effect, but also avoids increasing back pressure.
Description
Technical field
The utility model relates to a kind of hydraulic closed circuit system.
Background technique
Along with the fast development of infrastructure construction processes such as China's traffic, the energy, big-and-middle-sized in recent years engineering machinery demand and recoverable amount increase continuously fast.In numerous engineering machinery, particularly in the import equipment, adopt hydraulic transmission and fully hydraulic driven very general, as rock tunnel(ling) machine, shield structure, large-tonnage transportation car, crane, lifting chassis, and paver, excavator, bulldozer etc., hydraulic closed circuit system energy consumption is low, compact structure is also realized stepless change easily, has obtained using widely in the engineering machinery walking system.
With respect to open circuit, in the closed circuit system, the radiating effect of fluid is bad always, can only come deep fat in the replacing system by slippage pump, so the temperature that has in the cooling of the oil that cements out of slippage pump and the fuel tank is just quite important.The oil that slippage pump cements out comprises motor flushing fluid, oil hydraulic pump leakage oil, and these oil all flow out from pump and motor casing, and the pressure that housing bears is very low general for being 3-5bar, and this just requires straight drain line back pressure enough little.
Usually, drain line has two kinds of connections usually, one, and oil is through the supercooler oil sump tank, but the inflow-rate of water turbine of cooler is little or obstruction can cause the back pressure height, thus cause motor or casing of hydraulic pump to break, there is very big risk; Its two, allow the direct oil sump tank of sluicing leakage of oil, back pressure is little, but deep fat can influence the proper functioning of each element in the whole system with oil heating in the fuel tank.
Summary of the invention
The purpose of this utility model is, at the problems referred to above, proposes a kind of hydraulic closed circuit system, can produce good cooling effect, does not increase back pressure again.
For achieving the above object, the technical solution adopted in the utility model is: a kind of hydraulic closed circuit system, comprise enclosed motor (1), enclosed oil pump (2) and fuel tank (3), the pressure hydraulic fluid port of described enclosed oil pump (2) is connected with the filler opening of enclosed motor (1), the inlet port of enclosed oil pump (2) is connected with the return opening of enclosed motor (1), and the repairing mouth of enclosed oil pump (2) is connected with fuel tank (3); Also comprise cooling equipment.
Further, described cooling equipment comprises oil-collecting bucket (6), gear oil pump (5) and cooler (4), wherein: described oil-collecting bucket (6) links to each other with the housing of enclosed motor (1), the drain tap of enclosed oil pump (2) and the filler opening of gear oil pump (5) respectively by oil pipe; The oil outlet of described gear oil pump (5) links to each other by the filler opening of oil pipe with cooler (4); The oil outlet of cooler (4) links to each other with fuel tank (3) by oil pipe.
Further, be provided with filter (7) between described oil-collecting bucket (6) and gear oil pump (5), wherein: the filler opening of described filter (7) links to each other with the oil outlet of oil-collecting bucket (6), and oil outlet is connected with the filler opening of gear oil pump (5).
Further, described oil-collecting bucket (6) and fuel tank (3) are connected by oil pipe (8).
Hydraulic closed circuit system described in the utility model, comprise enclosed motor, enclosed oil pump and fuel tank, the pressure hydraulic fluid port of enclosed oil pump is connected with the filler opening of enclosed motor, and the inlet port of enclosed oil pump is connected with the return opening of enclosed motor, and the repairing mouth of enclosed oil pump is connected with fuel tank; Also comprise cooling equipment; Can on the basis of original hydraulic system, increase a cooling equipment, to reveal oil row earlier to the oil-collecting bucket, pump from the oil-collecting bucket by a gear oil pump again, directly supply with cooler, the back pressure problems that cooler causes successfully solved owing to can well be dispelled the heat again.
Description of drawings
Accompanying drawing is used to provide further understanding of the present utility model, and constitutes the part of specification, is used from explanation the utility model with embodiment one of the present utility model, does not constitute restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation according to the utility model hydraulic closed circuit system.
In conjunction with the accompanying drawings, reference character is as follows among the utility model embodiment:
1-enclosed motor; 2-enclosed oil pump; The 3-fuel tank; The 4-cooler; The 5-gear oil pump; 6-oil-collecting bucket; The 7-filter; The 8-oil pipe.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the utility model, and be not used in qualification the utility model.
According to the utility model embodiment, provide a kind of hydraulic closed circuit system.As shown in Figure 1, present embodiment comprises enclosed motor 1, enclosed oil pump 2 and fuel tank 3, the pressure hydraulic fluid port of enclosed oil pump 2 is connected with the filler opening of enclosed motor 1, and the inlet port of enclosed oil pump 2 is connected with the return opening of enclosed motor 1, and the repairing mouth of enclosed oil pump 2 is connected with fuel tank 3; Also comprise cooling equipment.
Wherein, cooling equipment comprises oil-collecting bucket 6, gear oil pump 5 and cooler 4, and oil-collecting bucket 6 links to each other with the housing of enclosed motor 1, the drain tap of enclosed oil pump 2 and the filler opening of gear oil pump 5 respectively by oil pipe; The oil outlet of gear oil pump 5 links to each other by the filler opening of oil pipe with cooler 4; The oil outlet of cooler 4 links to each other with fuel tank 3 by oil pipe.Here, oil-collecting bucket 6 and fuel tank 3 are connected by oil pipe 8.
Further, in the above-described embodiments, be provided with filter 7 between oil-collecting bucket 6 and gear oil pump 5, wherein: the filler opening of filter 7 links to each other with the oil outlet of oil-collecting bucket 6, and oil outlet is connected with the filler opening of gear oil pump 5.
In the above-described embodiments, press off the formula circuit system by 2 feedings of enclosed oil pump high pressure oil is provided, drive 1 action of enclosed motor then; An integrated slippage pump replenishes the fluid that the enclosed pump leaks and motor washes in the enclosed oil pump 2, normally moves to satisfy system; Enclosed oil pump 2 leaks fluid and enters pump case, and the heat with oil pump produces enters into collecting tun 6 by oil pipe then; The deep fat of discharging in 1 flushing valve of enclosed motor enters motor casing, enters into collecting tun 6 by oil pipe, and it is suitable with the slippage pump flow that collecting tun 6 ends are provided with gear oil pump 5 flows.
For causing gear pump, the instability that prevents leakage flow and flushing flow rate inhales empty situation, it is logical that an oil pipe 8 is set between fluid collecting tun and fuel tank, guarantee the gear pump proper functioning, gear oil pump 5 oil outlets and cooler 4 connect, deep fat enters fuel tank 3 after cooling off by cooler 4, given full play to the cooling effect of cooler, guaranteed that again high temperature oil can not enter system once more.Increase a filtrating equipment 7 at collecting tun 6 and 5 of gear oil pumps,, under the situation that does not cause back pressure, can once filter fluid because gear oil pump 5 oil suctions produce negative pressure.
In sum, the described hydraulic closed circuit system of each embodiment of the utility model, comprise enclosed motor, enclosed oil pump and fuel tank, the pressure hydraulic fluid port of enclosed oil pump is connected with the filler opening of enclosed motor, the inlet port of enclosed oil pump is connected with the return opening of enclosed motor, and the repairing mouth of enclosed oil pump is connected with fuel tank; Also comprise cooling equipment; Can on the basis of original hydraulic system, increase a cooling equipment, to reveal oil row earlier to the oil-collecting bucket, pump from the oil-collecting bucket by a gear oil pump again, directly supply with cooler, the back pressure problems that cooler causes successfully solved owing to can well be dispelled the heat again
It should be noted that at last: the above only is preferred embodiment of the present utility model, be not limited to the utility model, although the utility model is had been described in detail with reference to previous embodiment, for a person skilled in the art, it still can be made amendment to the technological scheme that aforementioned each embodiment put down in writing, and perhaps part technical characteristics wherein is equal to replacement.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (4)
1. hydraulic closed circuit system, comprise enclosed motor (1), enclosed oil pump (2) and fuel tank (3), the pressure hydraulic fluid port of described enclosed oil pump (2) is connected with the filler opening of enclosed motor (1), the inlet port of enclosed oil pump (2) is connected with the return opening of enclosed motor (1), and the repairing mouth of enclosed oil pump (2) is connected with fuel tank (3); It is characterized in that, also comprise cooling equipment.
2. hydraulic closed circuit system according to claim 1 is characterized in that, described cooling equipment comprises oil-collecting bucket (6), gear oil pump (5) and cooler (4), wherein:
Described oil-collecting bucket (6) links to each other with the housing of enclosed motor (1), the drain tap of enclosed oil pump (2) and the filler opening of gear oil pump (5) respectively by oil pipe;
The oil outlet of described gear oil pump (5) links to each other by the filler opening of oil pipe with cooler (4); The oil outlet of cooler (4) links to each other with fuel tank (3) by oil pipe.
3. hydraulic closed circuit system according to claim 2 is characterized in that, is provided with filter (7) between described oil-collecting bucket (6) and gear oil pump (5), wherein:
The filler opening of described filter (7) links to each other with the oil outlet of oil-collecting bucket (6), and oil outlet is connected with the filler opening of gear oil pump (5).
4. according to claim 2 or 3 described hydraulic closed circuit systems, it is characterized in that described oil-collecting bucket (6) and fuel tank (3) are connected by oil pipe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205728474U CN201836149U (en) | 2010-10-22 | 2010-10-22 | Hydraulic closed loop system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205728474U CN201836149U (en) | 2010-10-22 | 2010-10-22 | Hydraulic closed loop system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201836149U true CN201836149U (en) | 2011-05-18 |
Family
ID=44006253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205728474U Expired - Lifetime CN201836149U (en) | 2010-10-22 | 2010-10-22 | Hydraulic closed loop system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201836149U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266892A (en) * | 2013-05-02 | 2013-08-28 | 三一重型装备有限公司 | Continuous coal cutter |
| CN103277368A (en) * | 2013-05-28 | 2013-09-04 | 江苏德航工程机械装备有限公司 | Independent hydraulic cooling compensation system for crawler-type horizontal directional drilling machine power head |
| CN113586559A (en) * | 2021-07-22 | 2021-11-02 | 三一重机有限公司 | Hydraulic oil cooling system and working machine |
-
2010
- 2010-10-22 CN CN2010205728474U patent/CN201836149U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103266892A (en) * | 2013-05-02 | 2013-08-28 | 三一重型装备有限公司 | Continuous coal cutter |
| CN103277368A (en) * | 2013-05-28 | 2013-09-04 | 江苏德航工程机械装备有限公司 | Independent hydraulic cooling compensation system for crawler-type horizontal directional drilling machine power head |
| CN113586559A (en) * | 2021-07-22 | 2021-11-02 | 三一重机有限公司 | Hydraulic oil cooling system and working machine |
| CN113586559B (en) * | 2021-07-22 | 2024-01-23 | 三一重机有限公司 | Hydraulic oil cooling system and working machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110518 |