CN103452958A - Pressure valve debugging system - Google Patents
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- CN103452958A CN103452958A CN2013104156423A CN201310415642A CN103452958A CN 103452958 A CN103452958 A CN 103452958A CN 2013104156423 A CN2013104156423 A CN 2013104156423A CN 201310415642 A CN201310415642 A CN 201310415642A CN 103452958 A CN103452958 A CN 103452958A
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- 239000002243 precursor Substances 0.000 claims description 21
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- 230000003749 cleanliness Effects 0.000 abstract 1
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- 239000003921 oil Substances 0.000 description 145
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- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
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Abstract
The invention provides a pressure valve debugging system, comprising: the oil supply circuit comprises at least one oil pump, and an output pipeline of the oil pump is provided with a first output node; the pressure regulating test oil path is connected with the first output node and used for installing a valve to be pressure regulated, and the pressure regulating test oil path comprises a flowmeter and a pressure detection access point which are arranged between the valve to be pressure regulated and the first output node in series; and the pressure limiting oil way is connected with the first output node and used for limiting the pressure of the pressure regulating test oil way. According to the invention, the valve to be subjected to pressure regulation is connected to the pressure regulation test oil path, and the oil supply path is used for regulating the pressure and the flow of the pressure regulation test oil path, namely the valve to be subjected to pressure regulation adopts a uniform connection mode, and the pipeline does not need to be modified during regulation, so that the operation amount of pressure regulation is effectively reduced, the problem of operation space limitation is solved, and the influence of the pipeline during disassembly and assembly on the cleanliness of a hydraulic system can be prevented; in addition, the pressure regulating operator does not need to know the working principle of the loop, and the requirement of the operator is reduced.
Description
Technical field
The present invention relates to pressure valve pressure regulation testing apparatus field, in particular to a kind of pressure valve debug system.
Background technique
The hydraulic system functions such as hoister in large tonnage are gradually improved, and flow, the pressure of different circuit are different, often adopt the relief valve of different size, reduction valve equal pressure valve to carry out pressure limiting.Can each relief valve, reduction valve accurately regulate the pressure of each pressure valve according to design, and the normal operation of hoist is had to larger impact.In addition, the pressure drop of pressure valve under different flow is different, in order to regulate exactly pressure valve, must provide suitable flow.
Because hydraulic system functions such as hoist early are relatively simple, need relief valve, the reduction valve regulated relatively less, continue to use directly in the production debugging process the pressure controlled mode of carrying out to pressure valve in prior art always.Yet, along with the hydraulic system functions such as hoist are gradually improved, need to carry out pressure controlled relief valve, reduction valve is on the increase, continue to continue to use in the actual product debug process that pressure valve is carried out to pressure controlled mode problem is outstanding gradually.
At first, in debug products, the Placement difference of different pressures valve in different circuit, the regulative mode of each pressure valve is also different, just require the operator, to the principle in the loop of each pressure valve and place connection thereof, certain understanding is arranged, regulate otherwise can't complete pressure.Secondly, in debug products, the mounting point of the valve that is stressed, the restriction of pipeline and other component on every side, the spanner space is inadequate, is not easy to operation.Again, some pressure valve can directly be got rid of and press pressure to regulate by corresponding actions; Some pressure valve needs to revise pipeline, and disassembling pipe affects the turbidity test of the whole hydraulic system of debug products.
Summary of the invention
The present invention aims to provide a kind of easy to operate pressure valve debug system.
The invention provides a kind of pressure valve debug system, comprising: for oil circuit, comprise at least one oil pump, there is the first output node on the output pipe of oil pump; Pressure regulation test oil circuit, be connected with the first output node, and for pressure valve to be adjusted is installed, pressure regulation test oil circuit comprises that series connection is arranged on flowmeter and the Pressure testing access point between pressure valve to be adjusted and the first output node; The pressure limiting oil circuit, be connected with the first output node, for limiting the pressure of pressure regulation test oil circuit.
Further, the voltage-limiting protection state that it is P9 that the pressure limiting oil circuit has at pressure regulation test oil circuit conducting time limit pressure pressure, and disconnect at pressure regulation test oil circuit the holding state that the time limit pressure pressure is P0, and wherein, P0<P9.
Further, the pressure limiting oil circuit comprises the first pressure limiting oil circuit and the second pressure limiting oil circuit, and the first pressure limiting oil circuit is connected with the first output node respectively with the second pressure limiting oil circuit; Wherein, the pressure limiting pressure of the first pressure limiting oil circuit is P9; Be connected with solenoid valve on the second pressure limiting oil circuit, when solenoid valve conduction, the pressure limiting pressure of the second pressure limiting oil circuit is P0.
Further, the pressure limiting oil circuit comprises the 3rd pressure limiting oil circuit and the 4th pressure limiting oil circuit; The 3rd pressure limiting oil circuit is connected with the first output node, and the 4th pressure limiting oil circuit is for controlling the working state of the 3rd pressure limiting oil circuit, and wherein, the working state of the 3rd pressure limiting oil circuit comprises the holding state that voltage-limiting protection state that pressure limiting pressure is P9 and pressure limiting pressure are P0.
Further, on the 3rd pressure limiting oil circuit, be connected with precursor overflow valve, the oil pressure relief of precursor overflow valve is P9; The 4th pressure limiting oil circuit is connected with the pilot control end of precursor overflow valve, on the 4th pressure limiting oil circuit, is connected with solenoid valve, when solenoid valve conduction, and the precursor overflow valve off-load.
Further, on pressure regulation test oil circuit, be provided with the stop valve be connected with the first output node, and solenoid valve conducting disconnecting when the stop valve conducting when stop valve disconnects.
Further, the pressure valve debug system also comprises: position limit switch is electrically connected to solenoid valve, and coordinates with stop valve; Position limit switch has the first state that makes solenoid valve conduction when stop valve disconnects, and the second state that makes solenoid valve disconnect when the stop valve conducting.
Further, oil pump comprises the first oil pump and the second oil pump; The output terminal of the first oil pump is connected with the first output node by the first one-way valve, and the output terminal of the second oil pump is connected with the first output node by the second one-way valve.
Further, oil pump comprises the first oil pump and the second oil pump; The output terminal of the first oil pump is connected with the first output node by the first one-way valve, and the output terminal of the second oil pump is connected with the first output node by the second one-way valve; The outlet end of the second one-way valve has the second output node, and is in series with the 3rd one-way valve that the fuel feeding that prevents the first oil pump flows to the second output node between the first output node and the second output node; Be connected with the 5th pressure limiting oil circuit on the second output node, on the 5th pressure limiting oil circuit, be connected with relief valve; Wherein, the oil pressure relief of relief valve is P8, and P8<P9.
Further, relief valve is the external control relief valve, and the control end of external control relief valve is connected with the first output node.
Further, the rated pressure of the first oil pump is P2, and the rated pressure of the second oil pump is P4, wherein, and P8<P4; P4<P2; P9<P2.
According to pressure valve debug system of the present invention, pressure valve to be adjusted is connected on pressure regulation test oil circuit, exchange pressure and the Flow-rate adjustment of pressing the test oil circuit for oil circuit, pressure valve to be adjusted adopts unified Placement, do not need to reequip pipeline during adjusting, thereby the operation amount that effectively eases off the pressure and regulate, solve the problem of operating space restriction, also can prevent the impact of disassembling pipe on the hydraulic system turbidity test; In addition, because pressure valve to be adjusted adopts unified Placement, the pressure regulation operator only need to regulate pressure valve to be adjusted according to the pressure gauge be connected with the Pressure testing access point and the corresponding indication of flowmeter, and, without understanding the loop works principle, reduce operator's requirement.
The accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:
Fig. 1 is the principle schematic according to pressure valve debug system the first embodiment of the present invention;
Fig. 2 is the principle schematic according to pressure valve debug system the second embodiment of the present invention; And
Fig. 3 is the principle schematic according to pressure valve debug system the 3rd embodiment of the present invention.
Embodiment
Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
As depicted in figs. 1 and 2, according to pressure valve debug system of the present invention, comprise for oil circuit, pressure regulation test oil circuit and pressure limiting oil circuit, for oil circuit, comprise at least one oil pump, there is the first output node A on the output pipe of oil pump; Pressure regulation test oil circuit is connected with the first output node A, and for pressure valve 17 to be adjusted is installed, pressure regulation test oil circuit comprises that series connection is arranged on flowmeter 14 and the Pressure testing access point between pressure valve 17 to be adjusted and the first output node A; The pressure limiting oil circuit is connected with the first output node A, for limiting the pressure of pressure regulation test oil circuit.It is of the present invention by pressure valve 17 unifications to be adjusted are connected on pressure regulation test oil circuit, and by exchange pressure and the Flow-rate adjustment of pressing the test oil circuit for oil circuit, do not need to reequip pipeline when adjusting pressure valve 17 to regulate, thereby the operation amount that effectively eases off the pressure and regulate, solve the problem of operating space restriction, also can prevent the impact of disassembling pipe on the hydraulic system turbidity test; In addition, because pressure valve 17 to be adjusted adopts unified Placement, the pressure regulation operator only need to regulate pressure valve 17 to be adjusted according to the pressure gauge 15 be connected with the Pressure testing access point and the corresponding indication of flowmeter 14, and, without understanding the loop works principle, reduce operator's requirement.
Particularly, the voltage-limiting protection state that it is P9 that the pressure limiting oil circuit has at pressure regulation test oil circuit conducting time limit pressure pressure, and disconnect at pressure regulation test oil circuit the holding state that the time limit pressure pressure is P0, and wherein, P0<P9.That is, when the normal operation of pressure regulation test oil circuit, the pressure limiting pressure of pressure limiting oil circuit is P9, and whole debug system is formed to protection, prevents overpressure and causes the system failure or damage.When pressure regulation test oil circuit is not worked, as change in the process of pressure valve 17 to be adjusted, the pressure limiting pressure of pressure limiting oil circuit is P0, and P0 is generally very little, approaches and 0, thereby whole debug system need not be shut down, and operates in less pressure state standby.
As shown in Figure 1, in the first embodiment of the present invention, the pressure limiting oil circuit comprises the first pressure limiting oil circuit and the second pressure limiting oil circuit, the first pressure limiting oil circuit is connected with the first output node A respectively with the second pressure limiting oil circuit, wherein, the pressure limiting pressure of the first pressure limiting oil circuit is P9, and, after the pressure of the first output node A surpasses P9, whole system is from the first pressure limiting oil circuit off-load.Be connected with solenoid valve 10 on the second pressure limiting oil circuit, when solenoid valve 10 conducting, the pressure limiting pressure of the second pressure limiting oil circuit is P0.That is to say, when disconnecting solenoid valve 10, the first pressure limiting oil circuit is operated in the voltage-limiting protection state, and when electric conduction magnet valve 10, the second pressure limiting oil circuit is operated in holding state.
That is to say, by connected electromagnetic valve 10 on the second pressure limiting oil circuit, can when the oil circuit disconnection be tested in pressure regulation, make solenoid valve 10 conductings, thereby make the holding state of whole system in low pressure operation, can effectively reduce the system-down number of times, raise the efficiency.While particularly regulating a plurality of identical pressure valve continuously, after regulating for the first time pressure and flow and completing, only need to disconnect pressure regulation test oil circuit, make system standby, then change pressure valve to be adjusted, disconnect solenoid valve 10, conducting pressure regulation test oil circuit can enter debugging mode, do not need again to regulate pressure and flow, thereby greatly improve, regulate efficiency.
Preferably, as shown in Figure 1, also be provided with the stop valve 13 be connected with the first output node A on pressure regulation test oil circuit, realize conducting and the disconnection of pressure regulation test oil circuit, and stop valve 13 and solenoid valve 10 opposite action, be solenoid valve 10 conducting when stop valve 13 disconnects, disconnect when stop valve 13 conducting.Thereby guarantee that whole system, from precursor overflow valve 9 off-loads, makes in adjusting a plurality of when adjusting pressure valve 17 when the disconnection of pressure regulation test oil circuit stops; change in pressure valve 17 processes to be adjusted without shutdown; close stop valve 13, system is in the low pressure operation state, energy-conservation and can effectively increase work efficiency.
More preferably, the pressure valve debug system also comprises the position limit switch 12 be electrically connected to solenoid valve 10, and position limit switch 12 coordinates with stop valve 13, make position limit switch 12 trigger solenoid valve 10 conductings when stop valve 13 disconnects, and when stop valve 13 conducting, make the solenoid valve 10 disconnect.Can control solenoid valve 10 by operation stop valve 13, thereby do not need manually to control solenoid valve 10 and stop valve 13, improve the system intelligence degree, avoid in the debugging operations engineering, when disconnecting for one, and forget conducting another, occur two situations about simultaneously disconnecting causing system to bear higher pressure.
In the second embodiment of the present invention; the pressure limiting oil circuit adopts mode as shown in Figure 2; different from the first embodiment is; the pressure limiting oil circuit comprises the 3rd pressure limiting oil circuit and the 4th pressure limiting oil circuit; the 3rd pressure limiting oil circuit is connected with the first output node A; the 4th pressure limiting oil circuit is for controlling the working state of the 3rd pressure limiting oil circuit, and wherein, the working state of the 3rd pressure limiting oil circuit comprises the holding state that voltage-limiting protection state that pressure limiting pressure is P9 and pressure limiting pressure are P0.The pressure limiting pressure of the 3rd pressure limiting oil circuit comprises P0 and P9 two states.The 4th pressure limiting oil circuit is controlled the pressure limiting pressure of the 3rd pressure limiting oil circuit and is changed between P0 and P9.
Particularly, as shown in Figure 2, be connected with precursor overflow valve 9 on the 3rd pressure limiting oil circuit, the oil pressure relief of precursor overflow valve 9 is P9, the 4th pressure limiting oil circuit is connected with the pilot control end of precursor overflow valve 9, be connected with solenoid valve 10 on the 4th pressure limiting oil circuit, when solenoid valve 10 conducting, precursor overflow valve 9 off-loads.While being pressure regulation test oil circuit conducting work, solenoid valve 10 disconnects, and precursor overflow valve 9 is built pressure, and now the oil pressure relief of precursor overflow valve 9 is P9, and also the 3rd pressure limiting oil circuit is operated in the voltage-limiting protection state that pressure limiting pressure is P9.When the disconnection of pressure regulation test oil circuit stops, solenoid valve 10 conductings, the pilot control oil of precursor overflow valve 9 flows back to fuel tank 16, precursor overflow valve 9 off-loads, also the 3rd pressure limiting oil circuit is operated in the holding state that pressure limiting pressure is P0, whole system low pressure standby operation.Usually, in order to make system standby when operation, keep certain pressure, at the 4th pressure limiting oil circuit, also be in series with back pressure valve 11.In a second embodiment, solenoid valve 1 adopts the control mode identical with the first embodiment, and solenoid valve 10 is controlled by position limit switch 12 and stop valve 13, and when stop valve 13 conducting, solenoid valve 10 disconnects, when stop valve 13 disconnects, and solenoid valve 10 conductings.
As shown in Figure 3, in the third embodiment of the present invention, compare the first embodiment and the second embodiment, oil pump comprises the first oil pump 2 and the second oil pump 4, the output terminal of the first oil pump 2 is connected with the first output node A by the first one-way valve 6, and the output terminal of the second oil pump 4 is connected with the first output node A by the second one-way valve 5.Two oil pumps are simultaneously to the first output node A fuel feeding, and the first one-way valve 6 and the second one-way valve 5 prevent that hydraulic oil from refluxing, and protects two oil pumps.Preferably, two oil pumps adopt the combination of low pressure large discharge pump and high-pressure small-displacement pump, take full advantage of the characteristics of two pumps, and the pressure that can meet dissimilar, different rated flow pressure valve is regulated.
Particularly, the rated pressure of the first oil pump 2 is that P2, capacity rating are q2, and the first motor 1 that is N1 by rated speed drives; The rated pressure of the second oil pump 4 is that P4, capacity rating are q4, and the second motor 3 that to adopt rated speed be N3 drives, wherein, and P4<P2, P9<P2.Preferably, the outlet end of the second one-way valve 5 has the second output node B, and is in series with the 3rd one-way valve 7 that the fuel feeding that prevents the first oil pump 2 flows to the second output node B between the first output node A and the second output node B; Be connected with the 5th pressure limiting oil circuit on the second output node B, on the 5th pressure limiting oil circuit, be connected with relief valve 8; Wherein, the oil pressure relief of relief valve 8 is P8, and P8<P4, and the oil pressure relief of relief valve 8 is less than the rated pressure of the second oil pump 4, thereby the second oil pump is formed to protection.
In addition, P8<P9, after the pressure regulation pressure wait adjusting pressure valve 17 surpasses P8, the second oil pump 4 is by relief valve 8 off-loads, and the independent fuel feeding of the first oil pump 2 prevents that charge oil pressure is excessive and over the rated pressure of the second oil pump 4.Two oil pumps are simultaneously during fuel feeding, the adjustable maximum pressure regulation pressure of pressure valve 17 to be adjusted is P8, peak rate of flow is q4 * N3+q2 * N1, after pressure regulation pressure surpasses P8, the second oil pump 4 is by relief valve 8 off-loads, the independent fuel feeding of the first oil pump 2, the pressure maximum P9 that can regulate, after surpassing P9, the first oil pump 2 is by precursor overflow valve 9 off-loads.
Preferably, as shown in Figure 1, relief valve 8 is the external control relief valve, and the control end of this external control relief valve is connected with the first output node A, when two oil pumps simultaneously during fuel feeding, in the process that charge oil pressure constantly increases, after charge oil pressure surpasses P8, the conducting of external control relief valve, the 3rd one-way valve 7 is closed simultaneously, and the second oil pump 4 is by this external control relief valve off-load.Because the pressure of the control end (i.e. the first output node A) of external control relief valve still surpasses P8, this external control relief valve is always on state, thereby makes the second oil pump 4 operate in low-pressure state.If relief valve 8 is the automatic control relief valve, the second oil pump 4 can, always with oil pressure relief P8 operation, can additionally increase system loading.
Illustrate the working principle of pressure valve debug system of the present invention in conjunction with Fig. 1:
When pressure regulation starts, start the second motor 3, low-speed running, when stop valve 13 is not opened, the pilot control oil of precursor overflow valve 9 is through back pressure valve 11 oil sump tanks 16, precursor overflow valve 9 off-loads, the second oil pump 4 moves at low-pressure low flow.
Access after adjusting pressure valve 17, open stop valve 13, trigger position limit switch 12 solenoid valve 10 is disconnected, precursor overflow valve 9 is built pressure, and whole system is from pressure valve 17 off-loads to be adjusted.Regulate the rotating speed of the second motor 3, can realize that rated flow is less than q4 * N3, setting pressure is less than the pressure of the pressure valve to be adjusted 17 of P8 and regulates.
In the situation that the rotating speed of the second motor 3 reaches rated speed N3, restart the first motor 1, regulate the rotating speed of motor 1, can realize that rated flow is less than q4 * N3+q2 * N1, setting pressure is less than the pressure of the pressure valve to be adjusted 17 of P8 and regulates.
When the setting pressure wait adjusting pressure valve 17 is greater than P8, the second oil pump 4, from the off-load of external control relief valve, is regulated the rotating speed of the first motor 1, can realize that flow is less than q2 * N1, and setting pressure is less than the pressure of the pressure valve to be adjusted 17 of P9 and regulates.
Without shutdown, close stop valve 13 for upper one after adjusting pressure valve 17 to mix up, the pressure valve mixed up pulled down from test stand, make a record, then by the next one after adjusting pressure valve 17 to install, then open stop valve 13, by top step, regulated.Regulating continuously a plurality of identical pressure valve to be adjusted 17, can reduce significantly the operation to Flow-rate adjustment, regulate efficiency thereby improve.
As can be seen from the above description, the above embodiments of the present invention have realized following technique effect:
1. pressure valve debug system of the present invention adopts the combination of low pressure large discharge pump and high-pressure small-displacement pump, takes full advantage of the characteristics of two pumps, and the pressure that can meet dissimilar, different rated flow pressure valve is regulated.
2. pressure valve debug system of the present invention, when regulating a plurality of pressure valve, without shutdown, is closed stop valve in handoff procedure, and system is in the low pressure operation state, energy-conservation and can effectively increase work efficiency.
3. the pressure regulation process of pressure valve debug system of the present invention does not rely on concrete pressure valve, does not need to transform pipeline in adjustment process, has avoided the impact on product hydraulic system turbidity test.
4. the principle of pressure valve debug system of the present invention is simple, easy to operate, reduces the requirement to operator.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (11)
1. a pressure valve debug system, is characterized in that, comprising:
For oil circuit, comprise at least one oil pump, there is the first output node (A) on the output pipe of described oil pump;
Pressure regulation test oil circuit, with described the first output node (A), be connected, for pressure valve to be adjusted (17) is installed, described pressure regulation test oil circuit comprises that series connection is arranged on flowmeter (14) and the Pressure testing access point between pressure valve described to be adjusted (17) and described the first output node (A);
The pressure limiting oil circuit, be connected with described the first output node (A), for limiting the pressure of described pressure regulation test oil circuit.
2. pressure valve debug system according to claim 1, is characterized in that,
The voltage-limiting protection state that it is P9 that described pressure limiting oil circuit has at described pressure regulation test oil circuit conducting time limit pressure pressure, and disconnect at described pressure regulation test oil circuit the holding state that the time limit pressure pressure is P0, wherein, P0<P9.
3. pressure valve debug system according to claim 2, is characterized in that,
Described pressure limiting oil circuit comprises the first pressure limiting oil circuit and the second pressure limiting oil circuit, and described the first pressure limiting oil circuit is connected with described the first output node (A) respectively with described the second pressure limiting oil circuit;
Wherein, the pressure limiting pressure of described the first pressure limiting oil circuit is P9; Be connected with solenoid valve (10) on described the second pressure limiting oil circuit, when described solenoid valve (10) conducting, the pressure limiting pressure of described the second pressure limiting oil circuit is P0.
4. pressure valve debug system according to claim 2, is characterized in that,
Described pressure limiting oil circuit comprises the 3rd pressure limiting oil circuit and the 4th pressure limiting oil circuit;
Described the 3rd pressure limiting oil circuit is connected with described the first output node (A); described the 4th pressure limiting oil circuit is for controlling the working state of described the 3rd pressure limiting oil circuit; wherein, the working state of the 3rd pressure limiting oil circuit comprises the holding state that voltage-limiting protection state that pressure limiting pressure is P9 and pressure limiting pressure are P0.
5. pressure valve debug system according to claim 4, is characterized in that,
Be connected with precursor overflow valve (9) on described the 3rd pressure limiting oil circuit, the oil pressure relief of described precursor overflow valve (9) is P9;
Described the 4th pressure limiting oil circuit is connected with the pilot control end of described precursor overflow valve (9), on described the 4th pressure limiting oil circuit, is connected with solenoid valve (10), when described solenoid valve (10) conducting, and described precursor overflow valve (9) off-load.
6. according to the described pressure valve debug system of claim 3 or 5, it is characterized in that,
Be provided with the stop valve (13) be connected with described the first output node (A) on described pressure regulation test oil circuit, and described solenoid valve (10) conducting disconnecting when described stop valve (13) conducting when described stop valve (13) disconnects.
7. pressure valve debug system according to claim 6, is characterized in that, described pressure valve debug system also comprises:
Position limit switch (12), be electrically connected to described solenoid valve (10), and coordinate with described stop valve (13);
Described position limit switch (12) has the first state that makes described solenoid valve (10) conducting when described stop valve (13) disconnects, and the second state that makes described solenoid valve (10) disconnect when described stop valve (13) conducting.
8. according to the described pressure valve debug system of any one in claim 1 to 5, it is characterized in that,
Described oil pump comprises the first oil pump (2) and the second oil pump (4);
The output terminal of described the first oil pump (2) is connected with described the first output node (A) by the first one-way valve (6), and the output terminal of described the second oil pump (4) is connected with described the first output node (A) by the second one-way valve (5).
9. according to the described pressure valve debug system of claim 3 or 5, it is characterized in that,
Described oil pump comprises the first oil pump (2) and the second oil pump (4);
The output terminal of described the first oil pump (2) is connected with described the first output node (A) by the first one-way valve (6), and the output terminal of described the second oil pump (4) is connected with described the first output node (A) by the second one-way valve (5);
The outlet end of described the second one-way valve (5) has the second output node (B), and is in series with the 3rd one-way valve (7) that the fuel feeding that prevents described the first oil pump (2) flows to described the second output node (B) between described the first output node (A) and described the second output node (B);
Be connected with the 5th pressure limiting oil circuit on described the second output node (B), on described the 5th pressure limiting oil circuit, be connected with relief valve (8); Wherein, the oil pressure relief of described relief valve (8) is P8, and P8<P9.
10. pressure valve debug system according to claim 9, is characterized in that,
Described relief valve (8) is the external control relief valve, and the control end of described external control relief valve is connected with described the first output node (A).
11. pressure valve debug system according to claim 9, is characterized in that,
The rated pressure of described the first oil pump (2) is P2, and the rated pressure of described the second oil pump (4) is P4, wherein, and P8<P4; P4<P2; P9<P2.
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| CN109372828A (en) * | 2018-10-15 | 2019-02-22 | 中国北方车辆研究所 | A kind of hydraulic control system for comprehensive actuator |
| CN111964900A (en) * | 2020-08-25 | 2020-11-20 | 浙江斯特隆科技有限公司 | Multi-channel pressure setting test bench |
| CN112460084A (en) * | 2020-11-16 | 2021-03-09 | 上海宝冶集团有限公司 | Temporary pump station hydraulic system for debugging engineering high-level equipment and debugging method |
| CN112572386A (en) * | 2019-09-30 | 2021-03-30 | 比亚迪股份有限公司 | Device for processing a hydraulic vehicle brake system |
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| CN105805090A (en) * | 2016-04-27 | 2016-07-27 | 北京交通大学 | Safety device for stop valve of turbine pump |
| CN109372828A (en) * | 2018-10-15 | 2019-02-22 | 中国北方车辆研究所 | A kind of hydraulic control system for comprehensive actuator |
| CN109372828B (en) * | 2018-10-15 | 2022-09-09 | 中国北方车辆研究所 | Hydraulic control system for comprehensive transmission device |
| CN112572386A (en) * | 2019-09-30 | 2021-03-30 | 比亚迪股份有限公司 | Device for processing a hydraulic vehicle brake system |
| CN111964900A (en) * | 2020-08-25 | 2020-11-20 | 浙江斯特隆科技有限公司 | Multi-channel pressure setting test bench |
| CN111964900B (en) * | 2020-08-25 | 2023-11-24 | 浙江斯特隆科技有限公司 | Multipath pressure setting test bench |
| CN112460084A (en) * | 2020-11-16 | 2021-03-09 | 上海宝冶集团有限公司 | Temporary pump station hydraulic system for debugging engineering high-level equipment and debugging method |
| CN112460084B (en) * | 2020-11-16 | 2022-09-16 | 上海宝冶集团有限公司 | Temporary pump station hydraulic system for debugging engineering high-level equipment and debugging method |
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