CN218542760U - Hydraulic system and engineering machinery - Google Patents
Hydraulic system and engineering machinery Download PDFInfo
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- CN218542760U CN218542760U CN202222495222.8U CN202222495222U CN218542760U CN 218542760 U CN218542760 U CN 218542760U CN 202222495222 U CN202222495222 U CN 202222495222U CN 218542760 U CN218542760 U CN 218542760U
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- main pump
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- hydraulic system
- hydraulic
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Abstract
The utility model relates to a hydraulic system, for the problem that the hydraulic oil flow dispels the heat few slowly in the casing of solving current main pump, the utility model discloses construct a hydraulic system and engineering machine tool, wherein hydraulic system includes the main pump that oil absorption mouth and hydraulic tank are connected, the main control valve of being connected with the main pump mouth for the guide's oil circuit of control main control valve, the main pump passes through the oil drainage pipeline way and communicates main pump casing internal clearance and hydraulic tank, its characterized in that be provided with the intercommunication on the casing of main pump the cooling oil inlet of main pump casing internal clearance intercommunication, guide's oil circuit with the cooling oil inlet is connected. The utility model discloses in the clearance that the follow guide oil way introduction hydraulic oil entered into the main pump casing, strengthen the heat dissipation to the main pump casing.
Description
Technical Field
The utility model relates to a hydraulic system, more specifically say, relate to a hydraulic system and engineering machine tool.
Background
The hydraulic system of the engineering machinery comprises a hydraulic oil tank, a main pump, a main control valve and a hydraulic executive component. The main pump sucks oil from the hydraulic oil tank, and the hydraulic oil output from the pump port supplies oil to the hydraulic actuating part through the main control valve. And returning oil from the main control valve flows back to the hydraulic oil tank through the heat dissipation system. The main control valve is controlled by a pilot valve, the pilot valve is supplied with oil by a pilot oil source, and return oil of the pilot valve flows back to the oil tank.
When the main pump works, heat is generated due to mutual friction of devices in the main pump. At present, the heat dissipation of a main pump mainly has two ways, one way is that a shell radiates outwards, and the other way is that oil leaked into the shell from a high-pressure oil cavity of the main pump flows to a hydraulic oil tank from an oil drainage pipeline of the shell to take away heat.
At present, because the main pump volumetric efficiency is higher, the oil discharge of the main pump is less, hydraulic oil in the shell flows slowly, the heat dissipation effect of the main pump is poor, and the main pump works at a high temperature for a long time to cause the risk of failure of parts in the main pump due to high temperature.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that the little problem of heat dissipation slowly is dispelled in the casing hydraulic oil flow of current main pump, and provides a hydraulic system and engineering machine tool.
The utility model discloses a realize that the technical scheme of its purpose is like: the hydraulic system comprises a main pump, a main control valve and a pilot oil path, wherein the main pump is connected with an oil suction port and a hydraulic oil tank, the main control valve is connected with a pump port of the main pump, the pilot oil path comprises a pilot oil source, an oil inlet and a pilot valve, the pilot oil outlet of the pilot valve is connected with a hydraulic control end of the main control valve, a main pump shell oil return port which is communicated with the inner gap of a main pump shell on the main pump is communicated with the hydraulic oil tank through an oil drainage pipeline, and the hydraulic system is characterized in that the main pump shell is provided with a cooling oil inlet which is communicated with the inner gap of the main pump shell, and the pilot oil path is connected with the cooling oil inlet.
The utility model discloses in, set up the cooling oil inlet on the main pump casing to introduce hydraulic oil from the guide oil way through the cooling oil inlet and flow back to hydraulic tank in the main pump casing and through the draining pipeline way of being connected with hydraulic tank on the main pump casing, increase the flow of hydraulic oil in the main pump casing, take away the heat of main pump, cool down to it.
The utility model discloses among the hydraulic system, the main pump is the plunger pump.
The utility model discloses among the hydraulic system, the oil return opening of pilot valve is connected with the cooling oil inlet on the main pump casing. Or the hydraulic system also comprises a throttle valve, and the pilot oil source is connected with a cooling oil inlet on the main pump shell through the throttle valve.
The utility model discloses among the hydraulic system, the guide's oil supply is the guide's pump. The pilot oil source may also be a pilot oil source valve connected to the main pump port.
The utility model discloses among the hydraulic system, hydraulic system still includes the overflow valve, the pump port of guide's pump with the oil feed end of overflow valve is connected, the end of producing oil of overflow valve with the cooling oil inlet is connected.
The utility model discloses among the hydraulic system, the oil feed end of overflow valve pass through the oil filter with guide's pump mouth is connected.
The utility model discloses a realize that the technical scheme of its purpose is like: a construction machine is constructed which is characterized by the aforementioned hydraulic system. The work machine may be an excavator, a loader, or the like.
Compared with the prior art, the utility model discloses in the clearance that the follow guide oil way introduction hydraulic oil entered into the main pump casing, strengthen the heat dissipation to the main pump casing.
Drawings
Fig. 1 is a schematic diagram of a first embodiment of the hydraulic system of the present invention.
Fig. 2 is a schematic diagram of a second embodiment of the hydraulic system of the present invention.
Part names and serial numbers in the figure:
the hydraulic control system comprises a main pump 1, a pilot pump 2, a hydraulic oil tank 3, a throttle valve 4, a pilot valve oil inlet pipeline 5, a pilot valve 6, a hydraulic actuating part 7, a main control valve 8, a heat dissipation assembly 9, an oil return filter 10, an oil drainage pipeline 11, an overflow valve 12, an oil filter 13 and a pilot valve oil return pipeline 14.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
The first embodiment.
Fig. 1 shows a schematic diagram of a first embodiment of a hydraulic system of a construction machine according to the present invention. The work machine may be an excavator, a loader, or the like.
As shown in fig. 1, the hydraulic system includes a main pump having an oil suction port connected to a hydraulic oil tank, a main control valve connected to a pump port of the main pump, a hydraulic actuator connected to the main control valve, and a pilot oil path for controlling the main control valve, wherein return oil flowing out of the main control valve flows back to the hydraulic oil tank through a radiator assembly and a return oil filter. The main pump is a plunger pump, and a main pump shell oil return port communicated with the inner gap of the main pump shell on the main pump is communicated with the hydraulic oil tank through an oil drainage pipeline.
A cooling oil inlet communicated with the gap in the main pump shell is formed in the shell of the main pump, and a pilot oil way is connected with the cooling oil inlet.
The pilot oil circuit includes pilot pump 2, pilot valve 6, and the oil inlet and the hydraulic tank of pilot pump 2 are connected, and the pump mouth of pilot pump 2 advances oil pipe way 5 through the pilot valve and is connected with the oil inlet of pilot valve 6, and the pilot output hydraulic fluid port of pilot valve 6 is connected with the pilot liquid accuse end of main control valve, and the oil return opening of pilot valve passes through pilot valve oil return line 14 and is connected with hydraulic tank.
One end of the throttle valve 4 is connected with a pump port of the pilot pump 6, and the other end of the throttle valve is connected with a cooling oil inlet of the main pump shell.
The pump port of the pilot pump 2 is connected with the oil inlet end of an overflow valve 12 through an oil filter 13, and the oil outlet end of the overflow valve 12 is connected with the cooling oil inlet of the main pump shell.
The working principle of the hydraulic system in the embodiment is as follows:
the main pump 1 sucks hydraulic oil from the hydraulic oil tank 3, outputs the hydraulic oil from a pump port, supplies oil to the main control valve 8, and returns return oil which flows out of the hydraulic actuator 7 and flows through the main control valve to the hydraulic oil tank 3 through the heat dissipation assembly 9 and the return oil filter 10. The leaked oil liquid enters the inner clearance of the main pump shell in the working process of the main pump 1 and flows back to the hydraulic oil tank 3 through the oil drainage pipeline 11.
The pilot oil output by the pilot pump 2 flows to the pilot valve 6 through the pilot oil inlet pipeline 5 and flows to the pilot liquid control end of the main control valve through the pilot valve 6, and the main control valve is controlled to change the direction, so that corresponding actions are realized. The return oil from the pilot valve 6 flows back to the hydraulic tank 3 via the pilot valve return line 14. The pilot oil output from the pilot pump 1 also flows from the cooling oil inlet of the main pump housing to the main pump housing gap through the throttle valve 4, and then flows from the oil drain line 11 to the hydraulic oil tank 3.
In this embodiment, the hydraulic oil is led out from the pilot oil path and flows to the main pump housing gap, and flows back to the hydraulic oil tank 3 from the oil drain line 11, and the pilot oil source led in from the cooling oil inlet of the main pump housing increases the oil flow in the main pump housing gap, thereby taking away the heat of the main pump and facilitating the heat dissipation of the main pump.
Example two.
Fig. 2 shows a schematic diagram of a second embodiment of a hydraulic system of a construction machine according to the present invention.
Compared with the first embodiment, the hydraulic system in the present embodiment is different in that the return oil of the pilot valve 6 is connected to the cooling oil inlet of the main pump housing through a pilot valve return line 14. When carrying out the pilot valve operation, the oil return of pilot valve is through the cooling oil inlet of pilot valve oil return line 14 flow direction main pump casing, enters into main pump casing internal clearance, from draining pipeline 11 flow direction hydraulic tank 3, takes away the heat of main pump, helps the main pump heat dissipation.
Claims (8)
1. The hydraulic system comprises a main pump, a main control valve and a pilot oil way, wherein the main pump is connected with an oil suction port and a hydraulic oil tank, the main control valve is connected with a pump port of the main pump, the pilot oil way comprises a pilot oil source, an oil inlet and a pilot valve connected with the pilot oil source, a pilot output port of the pilot valve is connected with a pilot liquid control end of the main control valve, a main pump shell oil return port communicated with a main pump shell inner gap on the main pump is communicated with the hydraulic oil tank through an oil drainage pipeline, and the hydraulic system is characterized in that a cooling oil inlet communicated with the main pump shell inner gap is arranged on a main pump shell, and the pilot oil way is connected with the cooling oil inlet.
2. The hydraulic system of claim 1, wherein the main pump is a plunger pump.
3. The hydraulic system of claim 2, wherein the return port of the pilot valve is connected to a cooling inlet port on the main pump housing.
4. The hydraulic system of claim 2, further comprising a throttle valve, said pilot oil source being connected to a cooling oil inlet port in the main pump housing through said throttle valve.
5. The hydraulic system of claim 1, wherein the pilot oil source is a pilot pump.
6. The hydraulic system according to any one of claims 1 to 5, characterized in that the hydraulic system further comprises an overflow valve, the pilot oil source is connected to an oil inlet end of the overflow valve, and an oil outlet end of the overflow valve is connected to the cooling oil inlet.
7. The hydraulic system of claim 6, wherein an oil inlet end of the spill valve is connected to the pilot pump port through an oil filter.
8. A working machine, characterized by further comprising a hydraulic system according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222495222.8U CN218542760U (en) | 2022-09-21 | 2022-09-21 | Hydraulic system and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222495222.8U CN218542760U (en) | 2022-09-21 | 2022-09-21 | Hydraulic system and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218542760U true CN218542760U (en) | 2023-02-28 |
Family
ID=85275439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222495222.8U Active CN218542760U (en) | 2022-09-21 | 2022-09-21 | Hydraulic system and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218542760U (en) |
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2022
- 2022-09-21 CN CN202222495222.8U patent/CN218542760U/en active Active
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