CN212717424U - Pressure relief hydraulic system and closed hydraulic system - Google Patents
Pressure relief hydraulic system and closed hydraulic system Download PDFInfo
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- CN212717424U CN212717424U CN202021249162.6U CN202021249162U CN212717424U CN 212717424 U CN212717424 U CN 212717424U CN 202021249162 U CN202021249162 U CN 202021249162U CN 212717424 U CN212717424 U CN 212717424U
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Abstract
The utility model belongs to the technical field of hydraulic pressure, a pressure release hydraulic system and closed hydraulic system are disclosed. The pressure relief hydraulic system comprises a hydraulic pump, an oil compensating pump, a motor, a radiator and a pressure relief mechanism, wherein an oil inlet of the oil compensating pump is communicated with an oil tank, an oil outlet of the oil compensating pump is communicated with the hydraulic pump, the hydraulic pump is communicated with the motor to form a closed loop, a first oil drainage port is formed in a shell of the hydraulic pump, a second oil drainage port is formed in the shell of the motor, one end of the radiator is respectively communicated with the first oil drainage port and the second oil drainage port, and the other end of the radiator is communicated with the oil tank; one end of the pressure relief mechanism is respectively communicated with the first oil drainage port and the second oil drainage port, and the other end of the pressure relief mechanism is communicated with the oil inlet of the oil supplementing pump, so that hydraulic oil flowing out of the first oil drainage port and the second oil drainage port can flow into the oil inlet of the oil supplementing pump through the pressure relief mechanism. This pressure release hydraulic system reduces the radiating hydraulic oil flow through the radiator, has solved the high problem of hydraulic pump and motor draining pressure.
Description
Technical Field
The utility model relates to a hydraulic pressure technical field especially relates to a pressure release hydraulic system and closed hydraulic system.
Background
The hydraulic system comprises an open hydraulic system and a closed hydraulic system, wherein the oil drainage flow of the open hydraulic system only comes from the internal leakage of the open hydraulic system. Hot oil in hydraulic pumps and motor shells of the closed hydraulic system needs to be flushed by hydraulic oil output by the oil supplementing pump so as to achieve the purpose of heat dissipation.
The existing hydraulic pump and motor drainage of the closed hydraulic system only enters a radiator for heat dissipation and then flows back to an oil tank to form a path. When the closed hydraulic system is started and operated at the initial stage or is started and operated in a low-temperature environment, the oil drainage flow of the hydraulic oil pump and the motor shell is large, the low-temperature viscosity of hydraulic oil is large, the oil drainage pressure of the hydraulic pump and the motor shell is high, and when the oil drainage pressure exceeds an allowable value, the hydraulic pump and the motor break the oil leakage condition, so that the reliability of the system is reduced.
In order to solve the problem of high pressure of a closed hydraulic pump and a motor shell, the specification of an oil drainage pipeline needs to be increased, so that the installation space is limited, and the installation difficulty and cost are increased. If the return oil of other working hydraulic systems enters a radiator after converging with the shell oil drainage of the closed hydraulic system or the oil drainage pipeline is too long, the problem of high oil drainage pressure of a hydraulic pump and a motor shell of the closed hydraulic system cannot be solved by increasing the pipeline specification.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pressure release hydraulic system and closed hydraulic system for solve the high problem of hydraulic pump, motor casing pressure, simple structure, the installation degree of difficulty is little.
To achieve the purpose, the utility model adopts the following technical proposal:
a pressure relief hydraulic system comprises a hydraulic pump, an oil supplementing pump, a motor and a radiator, wherein the hydraulic pump and the oil supplementing pump are driven by the motor together, an oil inlet of the oil supplementing pump is communicated with an oil tank, an oil outlet of the oil supplementing pump is communicated with the hydraulic pump, the hydraulic pump is communicated with the motor to form a closed loop, a shell of the hydraulic pump is provided with a first oil drainage port, a shell of the motor is provided with a second oil drainage port, one end of the radiator is communicated with the first oil drainage port and the second oil drainage port respectively, and the other end of the radiator is communicated with the oil tank;
one end of the pressure relief mechanism is communicated with the first oil drainage port and the second oil drainage port respectively, and the other end of the pressure relief mechanism is communicated with the oil inlet of the oil supplementing pump, so that hydraulic oil flowing out of the first oil drainage port and the second oil drainage port can flow into the oil inlet of the oil supplementing pump through the pressure relief mechanism.
Preferably, the pressure relief mechanism comprises a pressure relief pipeline, one end of the pressure relief pipeline is respectively communicated with the first oil drainage port and the second oil drainage port, the other end of the pressure relief pipeline is communicated with the oil inlet of the oil supplementing pump, and the pressure relief pipeline at least comprises a rubber pipe section.
Preferably, the pressure relief mechanism further comprises a one-way valve, and the one-way valve is arranged on the pressure relief pipeline.
Preferably, the check valve has an opening pressure smaller than a maximum drain pressure of the hydraulic pump and a casing of the motor.
Preferably, the hydraulic pump further comprises an oil supplementing overflow valve, and an oil outlet of the oil supplementing pump is communicated with the shell of the hydraulic pump through the oil supplementing overflow valve.
Preferably, the oil supplementing pump further comprises a first overflow valve, and an oil outlet of the oil supplementing pump is communicated with the hydraulic pump through the first overflow valve.
Preferably, the oil replenishing pump further comprises a filter, and the filter is arranged on a communication pipeline between an oil outlet of the oil replenishing pump and the first overflow valve.
Preferably, the device further comprises a flushing valve, and the motor is communicated with the oil tank through the flushing valve.
Preferably, the flushing device further comprises a second overflow valve, and the second overflow valve is arranged between the flushing valve and the oil tank.
In order to achieve the above object, the utility model also provides a closed hydraulic system, including foretell pressure release hydraulic system.
The utility model has the advantages that:
the utility model provides a pressure release hydraulic system, when normal during operation, the oil inlet of fuel feeding pump communicates in the oil tank, and the oil-out of fuel feeding pump communicates in the hydraulic pump, and the hydraulic pump communicates in the motor, forms closed return circuit, and the fuel feeding pump provides required draining in the normal course of operation for hydraulic pump and motor. Through being provided with first draining port on the casing at the hydraulic pump, be provided with the second draining port on the casing of motor, the one end of radiator communicates respectively in first draining port and second draining port, and the other end communicates in the oil tank, and the draining in hydraulic pump, the motor can flow back to in the oil tank through the radiator heat dissipation back, and the radiator plays the radiating effect of hydraulic oil in to motor and the hydraulic pump.
Communicate pressure relief mechanism's one end respectively in first draining port and second draining port, the other end communicates in the oil inlet of oil supplementing pump, make the hydraulic oil that flows from first draining port and second draining port flow in through pressure relief mechanism inflow oil inlet, pressure relief mechanism has played the effect of supplementary draining, reduce the hydraulic oil flow through the radiator heat dissipation, the problem that hydraulic pump and motor draining pressure are high among the closed hydraulic system has been solved, avoid causing the condition that hydraulic pump and motor washed out the oil leak because of draining pressure is too high, thereby improve entire system's stability and reliability.
The utility model also provides a closed hydraulic system, including foretell pressure release hydraulic system. When other closed hydraulic system's oil return and hydraulic pump, motor casing draining confluence after get into the radiator and dispel the heat, because the flow that gets into the radiator is big, lead to bigger draining pressure, prior art adopts increase pipeline specification can not solve the problem usually, this pressure release hydraulic system is through setting up pressure release mechanism for solve the problem that hydraulic pump, motor casing pressure are high, and do not receive installation space's restriction, simple structure, the installation degree of difficulty is little.
Drawings
Fig. 1 is a schematic structural diagram of the pressure relief hydraulic system of the present invention.
In the figure:
1. a hydraulic pump; 2. an oil replenishing pump; 3. a motor; 4. a motor; 5. a heat sink; 6. a pressure relief mechanism; 7. An oil-supplementing overflow valve; 8. a filter; 9. a first overflow valve; 10. a flush valve; 11. a second overflow valve;
61. a pressure relief pipeline; 62. a one-way valve.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The embodiment provides a pressure release hydraulic system, as shown in fig. 1, this pressure release hydraulic system includes hydraulic pump 1, oil supply pump 2, motor 3, motor 4, radiator 5 and pressure release mechanism 6, hydraulic pump 1 specifically is the closed pump, hydraulic pump 1 and oil supply pump 2 are driven by motor 4 jointly, oil inlet (a mouth) of oil supply pump 2 communicates in the oil tank, the oil-out of oil supply pump 2 communicates in hydraulic pump 1, hydraulic pump 1 communicates in motor 4, form the closed return circuit (the oil-out of hydraulic pump 1 communicates the oil inlet of motor 4, the oil-out of motor 4 communicates the oil inlet of hydraulic pump 1), the oil-out and the closed return circuit intercommunication of oil supply pump 2, be used for the oil supply. A first oil drainage port (L port) is arranged on the shell of the hydraulic pump 1, a second oil drainage port (U port) is arranged on the shell of the motor 4, one end of the radiator 5 is respectively communicated with the first oil drainage port and the second oil drainage port, and the other end of the radiator is communicated with the oil tank. One end of the pressure relief mechanism 6 is respectively communicated with the first oil drainage port and the second oil drainage port, and the other end of the pressure relief mechanism is communicated with the oil inlet of the oil supplementing pump 2, so that hydraulic oil flowing out of the first oil drainage port and the second oil drainage port can flow into the oil inlet of the oil supplementing pump 2 through the pressure relief mechanism 6.
The pressure release hydraulic system that this embodiment provided, hydraulic pump 1 and oil supply pump 2 are driven by motor 4 jointly, adopt a motor 4 to drive hydraulic pump 1 and oil supply pump 2 simultaneously, save manufacturing cost. When normally working, the oil inlet of the oil replenishing pump 2 is communicated with the oil tank, the oil outlet of the oil replenishing pump 2 is communicated with the hydraulic pump 1, the hydraulic pump 1 is communicated with the motor 4 to form a closed loop, and the oil replenishing pump 2 provides required oil drainage in the normal working process for the hydraulic pump 1 and the motor 4. Through being provided with first draining port on hydraulic pump 1's casing, be provided with the second draining port on motor 4's casing, the one end of radiator 5 communicates respectively in first draining port and second draining port, and the other end communicates in the oil tank, and the draining in hydraulic pump 1, the motor 4 passes through in radiator 5 heat dissipation back flow to the oil tank, and radiator 5 plays the radiating effect of hydraulic oil in motor 4 and the hydraulic pump 1.
Communicate pressure relief mechanism 6's one end respectively in first draining port and second draining port, the other end communicates in the oil inlet of oil replenishing pump 2, make the hydraulic oil that flows from first draining port and second draining port flow through pressure relief mechanism 6 in the oil inlet of oil replenishing pump 2, pressure relief mechanism 6 has played the effect of supplementary draining, reduce through the radiating hydraulic oil flow of radiator 5, the problem that hydraulic pump 1 and motor 4 draining pressure are high among the closed hydraulic system has been solved, avoid leading to the condition that hydraulic pump 1 and motor 4 washed out the bad oil leak because of draining pressure is too high, thereby improve entire system's stability and reliability.
Further, as shown in fig. 1, the pressure relief hydraulic system further includes an oil supply overflow valve 7, and an oil outlet of the oil supply pump 2 is communicated with a housing of the hydraulic pump 1 through the oil supply overflow valve 7. Through setting up oil supplementing overflow valve 7 for oil supplementing pump 2 can wash the replacement to the hot oil in the casing of hydraulic pump 1, with casing draining temperature among the reduction closed hydraulic system.
Further, as shown in fig. 1, the pressure relief hydraulic system further includes a first overflow valve 9, and an oil outlet of the oil supply pump 2 is communicated with the hydraulic pump 1 through the first overflow valve 9. Through setting up first overflow valve 9 for oil supplementing pump 2 can provide the required draining of normal work for hydraulic pump 1.
Further, a filter 8 is arranged on a communication pipeline between an oil outlet of the oil supplementing pump 2 and the first overflow valve 9, and the filter 8 is used for filtering impurities in hydraulic oil and preventing the impurities from damaging the hydraulic pump 1.
Further, as shown in fig. 1, the pressure relief hydraulic system further includes a flush valve 10, the motor 4 is communicated with the oil tank through the flush valve 10, and the flush valve 10 is used for replacing the hot oil in the motor 4. In this embodiment, the flushing valve 10 is a three-position three-way reversing valve, the oil outlet of the motor 4 is communicated with the first control port and the first oil port of the three-position three-way reversing valve, the oil inlet of the motor 4 is communicated with the second control port and the second oil port of the three-position three-way reversing valve, and the third oil port of the three-position three-way reversing valve is communicated with the oil tank. Further, this pressure release hydraulic system still includes second overflow valve 11, and second overflow valve 11 sets up between flushometer 10 and the oil tank, and second overflow valve 11 has played the effect of overflow.
Further, as shown in fig. 1, the pressure relief mechanism 6 includes a pressure relief pipeline 61, one end of the pressure relief pipeline 61 is respectively communicated with the first oil drainage port and the second oil drainage port, the other end is communicated with the oil inlet of the oil replenishing pump 2, the pressure relief pipeline 61 plays a role in relieving pressure of the motor 4 and the hydraulic pump 1, and the oil replenishing pump 2 can be compensated by the decompressed hydraulic oil.
The pressure relief pipeline 61 at least comprises a rubber pipe section, specifically, the pressure relief pipeline 61 comprises a first pipeline, a first rubber pipe, a second pipeline, a second rubber pipe and a third pipeline, one end of the first pipeline is respectively communicated with the first oil drainage port and the second oil drainage port, the other end of the first pipeline is communicated with the first rubber pipe, the first rubber pipe is made of rubber, and the rubber pipe is soft in texture and convenient to spatially arrange. The second pipeline is used for communicating the middle of the first rubber pipe and the second rubber pipe, one end of the second pipeline is communicated with one end, which is not connected with the first rubber pipe, of the first rubber pipe, the other end of the second pipeline is communicated with the second rubber pipe, the second rubber pipe is made of rubber, the texture is soft, and the spatial arrangement is convenient. One end of the third pipeline is communicated with one end of the second rubber pipe which is not communicated with the second pipeline, and the other end of the third pipeline is communicated with the oil inlet of the oil replenishing pump 2.
Further, as shown in fig. 1, the pressure relief mechanism 6 further includes a check valve 62, the check valve 62 is also called a back pressure check valve 62, and the check valve 62 is disposed on a second line of the pressure relief line 61. Through setting up check valve 62 for the flow direction of restriction hydraulic oil makes the hydraulic oil that first draining mouth and second draining mouth flow out pass through pressure relief mechanism 6 and flow into the oil inlet of oil supply pump 2. Set up check valve 62 between first draining port, second draining port and the oil inlet of oil supply pump 2, solve oil supply pump 2 and to the not enough problem of generating heat that arouses of hot oil replacement flow in the casing of hydraulic pump 1 and motor 4.
Specifically, the cracking pressure of the check valve 62 is smaller than the maximum drain pressure of the hydraulic pump 1 and the casing of the motor 4. When the casing oil drainage pressure of the hydraulic pump 1 and the motor 4 reaches the opening pressure of the one-way valve 62, the hydraulic oil in the casings of the hydraulic pump 1 and the motor 4 enters the oil inlet of the oil supplementing pump 2 through the one-way valve 62, and the oil drainage flow of the hydraulic pump 1 and the motor 4 through the radiator 5 is reduced, so that the casing oil drainage pressure is reduced.
For example: the opening pressure of the non-return valve 62 is 2bar and the maximum drain pressure of the hydraulic pump 1 and the housing of the motor 4 is 2.5 bar. When the oil drainage pressure of the shells of the hydraulic pump 1 and the motor 4 is greater than 2bar, one part of hydraulic oil flows back to the oil tank through the radiator 5, the check valve 62 is opened at the moment, the other part of hydraulic oil enters the oil inlet of the oil supplementing pump 2 through the check valve 62, the flow of the hydraulic oil radiated through the radiator 5 is reduced, the oil drainage pressure of the shells of the hydraulic pump 1 and the motor 4 is not greater than 2bar, and the reliability of the hydraulic pump 1 and the motor 4 is protected.
Through setting up check valve 62, hydraulic oil in the casing of hydraulic pump 1 and motor 4, only can enter into the oil inlet of oil supply pump 2 when casing draining pressure reaches check valve 62 opening pressure, avoid the hydraulic oil of oil supply pump 2 output to the condition that the hot oil was washed the replacement flow and is reduced in hydraulic pump 1 and the motor 4 casing when the oil temperature is higher, guarantee the hydraulic oil of oil supply pump 2 output to the hydraulic pump 1 and the radiating effect that washes of motor 4, make whole closed hydraulic system oil temperature keep in normal temperature range.
The embodiment also provides a closed hydraulic system, which comprises the pressure relief hydraulic system. When other closed hydraulic system's oil return and hydraulic pump 1, motor 4 draining confluence back get into radiator 5 and dispel the heat, because the flow that gets into radiator 5 is big, lead to bigger draining pressure, for example 3bar ~ 5bar, prior art adopts increase pipeline specification can not solve the problem usually, this pressure release hydraulic system is through setting up pressure release mechanism 6 for solve hydraulic pump 1, the high problem of motor 4 casing pressure, and do not receive installation space's restriction, moreover, the steam generator is simple in structure, the installation degree of difficulty is little.
In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to 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.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A pressure relief hydraulic system comprises a hydraulic pump (1), an oil supplementing pump (2), a motor (4) and a radiator (5), wherein an oil inlet of the oil supplementing pump (2) is communicated with an oil tank, an oil outlet of the oil supplementing pump (2) is communicated with the hydraulic pump (1), the hydraulic pump (1) is communicated with the motor (4) to form a closed loop, a first oil drainage port is formed in a shell of the hydraulic pump (1), a second oil drainage port is formed in a shell of the motor (4), one end of the radiator (5) is respectively communicated with the first oil drainage port and the second oil drainage port, and the other end of the radiator is communicated with the oil tank;
one end of the pressure relief mechanism (6) is communicated with the first oil drainage port and the second oil drainage port respectively, and the other end of the pressure relief mechanism is communicated with the oil inlet of the oil supplementing pump (2), so that hydraulic oil flowing out of the first oil drainage port and the second oil drainage port can flow into the oil inlet of the oil supplementing pump (2) through the pressure relief mechanism (6).
2. The pressure relief hydraulic system according to claim 1, characterized in that the pressure relief mechanism (6) comprises a pressure relief pipeline (61), one end of the pressure relief pipeline (61) is communicated with the first oil drain port and the second oil drain port respectively, the other end is communicated with the oil inlet of the oil replenishment pump (2), and the pressure relief pipeline (61) at least comprises a rubber pipe section.
3. The pressure relief hydraulic system according to claim 2, characterized in that said pressure relief mechanism (6) further comprises a one-way valve (62), said one-way valve (62) being arranged on said pressure relief line (61).
4. The pressure relief hydraulic system according to claim 3, characterized in that the cracking pressure of the non return valve (62) is smaller than the maximum pressure of the drain of the hydraulic pump (1) and the housing of the motor (4).
5. The pressure relief hydraulic system according to claim 1, further comprising an oil-supplementing overflow valve (7), wherein an oil outlet of the oil-supplementing pump (2) is communicated with a housing of the hydraulic pump (1) through the oil-supplementing overflow valve (7).
6. The pressure relief hydraulic system according to claim 1, characterized by further comprising a first overflow valve (9), wherein an oil outlet of the oil replenishment pump (2) is communicated with the hydraulic pump (1) through the first overflow valve (9).
7. The pressure relief hydraulic system according to claim 6, characterized by further comprising a filter (8), said filter (8) being provided on a communication pipe between an oil outlet of said oil replenishment pump (2) and said first overflow valve (9).
8. The pressure relief hydraulic system according to claim 1, further comprising a flush valve (10), wherein said motor (4) is in communication with said tank through said flush valve (10).
9. The pressure relieving hydraulic system of claim 8, further comprising a second excess flow valve (11), said second excess flow valve (11) being disposed between said flush valve (10) and said tank.
10. Closed hydraulic system, characterized in that it comprises a pressure relief hydraulic system according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021249162.6U CN212717424U (en) | 2020-06-30 | 2020-06-30 | Pressure relief hydraulic system and closed hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021249162.6U CN212717424U (en) | 2020-06-30 | 2020-06-30 | Pressure relief hydraulic system and closed hydraulic system |
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| CN212717424U true CN212717424U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021249162.6U Active CN212717424U (en) | 2020-06-30 | 2020-06-30 | Pressure relief hydraulic system and closed hydraulic system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115230929A (en) * | 2022-07-29 | 2022-10-25 | 广船国际有限公司 | Propeller system and ship |
| CN116146705A (en) * | 2022-12-28 | 2023-05-23 | 山东临工工程机械有限公司 | Hydraulic system with heat dissipation function and engineering machinery vehicle |
-
2020
- 2020-06-30 CN CN202021249162.6U patent/CN212717424U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115230929A (en) * | 2022-07-29 | 2022-10-25 | 广船国际有限公司 | Propeller system and ship |
| CN115230929B (en) * | 2022-07-29 | 2023-08-04 | 广船国际有限公司 | Propeller system and ship |
| CN116146705A (en) * | 2022-12-28 | 2023-05-23 | 山东临工工程机械有限公司 | Hydraulic system with heat dissipation function and engineering machinery vehicle |
| CN116146705B (en) * | 2022-12-28 | 2023-10-27 | 山东临工工程机械有限公司 | Hydraulic system with heat dissipation function and engineering machinery vehicle |
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