CN103321975A - Low-high pressure soft-start hydraulic oil source system - Google Patents
Low-high pressure soft-start hydraulic oil source system Download PDFInfo
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- CN103321975A CN103321975A CN2013102213169A CN201310221316A CN103321975A CN 103321975 A CN103321975 A CN 103321975A CN 2013102213169 A CN2013102213169 A CN 2013102213169A CN 201310221316 A CN201310221316 A CN 201310221316A CN 103321975 A CN103321975 A CN 103321975A
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Abstract
The invention belongs to the design technologies of oil sources of hydraulic systems and particularly discloses a lower-high pressure soft-start hydraulic oil source system. The lower-high pressure soft-start hydraulic oil source system comprises a system high-pressure pipe and a system oil return pipe which are respectively connected with an oil tank, the system high-pressure pipe is sequentially connected with a high-pressure filter, a one-way valve, a high-pressure hose, a main pump, a low-pressure hose and a butterfly valve, and an oil return opening of the oil tank is connected with the system oil return pipe through the oil return filter and a cooler sequentially; a low-high pressure soft-start module is arranged between the system high-pressure pipe and the system oil return pipe. According to the lower-high pressure soft-start hydraulic oil source system, pressure pulses to all pipelines and elements such as valves in a system high-pressure loop due to high-pressure oil can be reduced, the pulse peak value can be effectively reduced, and accordingly impacts on every element in the system can be reduced, so that the operational reliability is greatly improved; meanwhile, influences on a seal structure of an original design of the system are also reduced greatly, and impulsive noises and local leakage caused by hydraulic oil sources are effectively prevented, so that the service life of the hydraulic oil sources is greatly prolonged.
Description
Technical field
The invention belongs to hydraulic system oil sources designing technique, be specifically related to a kind of hydraulic oil source.
Background technique
Hydraulic system is owing to volume and quality is little, power-weight ratio is large, be easy to realize to-and-fro motion, be easy to realize the advantages such as large-scale stepless speed change, stable drive, long service life, easy operating, is widely used in each industrial fields such as Aero-Space, military project, traffic, boats and ships, mine.
Hydraulic oil source is as the power source of hydraulic system, and for the actuators such as actuator provide sufficient high-voltage oil liquid, actuator carries out compulsory exercise by the control of the control units such as servovalve, is the important component part of hydraulic system.The performance of hydraulic oil source has determined directly whether the design function of hydraulic system can be realized.Function admirable, oil sources reasonable in design can bring vital impact to performance, life-span, user cost, the maintenance intensity of whole system.In the Performance Assessment of oil sources, the system pressure impact size that causes in the pump opening process is to embody the important indicator of oil sources performance.
Hydraulic oil source mainly comprises the components such as pump, motor, fuel tank, filter, relief valve, hydraulic pipe line and various duty valves, and wherein pump links to each other with motor by coupling.During work, motor drives pump run-in synchronism by the High Rotation Speed of axle, and high-voltage oil liquid is outputed to control and actuator by components such as pipeline, filter, valves, is mechanical energy with electric energy conversion, realizes the function of hydraulic system.Motor is being opened moment, because its rotating speed raises at short notice fast, drive a large amount of high-voltage oil liquids of the instantaneous output of oil pump in hydraulic system, form a pressure crest, peak value can reach 2 times of pump delivery pressure, each component in the system is caused huge impact, have a strong impact on and damage internal structure and the sealing of component, cause the partially sealed inefficacy of system, and the wearing and tearing of component, cause that the part of impact noise and hydraulic oil source is revealed, greatly shortened the working life of hydraulic oil source, impact and to cause the oil sources disabler when serious, can't work.Actuator may cause misoperation in the situation that be subject to serious impact, thereby damages link even cause security incident.This phenomenon is especially obvious in the high-pressure high-flow hydraulic oil source, has larger potential safety hazard.
Summary of the invention
The object of the present invention is to provide a kind of can the minimizing that element is impacted loss, increases its working life, and reliability higher a kind of low-high pressure soft starting hydraulic oil source system.
Technological scheme of the present invention is as follows:
A kind of low-high pressure soft starting hydraulic oil source system, it comprises system high pressure pipe and the system oil return pipe that is connected with fuel tank respectively, described low-high pressure soft starting hydraulic oil source system also comprises main pump, the control port of described main pump is connected with the filler opening of pressure regulator valve, and the oil outlet of pressure regulator valve is connected with fuel tank; The inlet port of described main pump is connected with the inlet port of fuel tank with butterfly valve by low-pressure hose, and the high pressure hydraulic fluid port of described main pump is connected with the system high pressure pipe with high pressure filter by high pressure hose, one-way valve; The return opening of described fuel tank is connected with the system oil return pipe with cooler by return filter successively; It is characterized in that: be provided with low-high pressure soft starting module between described system oil return pipe and the system high pressure pipe, described low-the high pressure soft starting module comprises hydraulic control precursor overflow valve, accumulator and throttle valve, hydraulic control precursor overflow valve filler opening is connected with the system high pressure pipe, hydraulic control precursor overflow valve unloading port is connected with the system oil return pipe, is connected with the system high pressure pipe with throttle valve by accumulator on the external control hydraulic fluid port of hydraulic control precursor overflow valve.
Above-mentioned a kind of low-high pressure soft starting hydraulic oil source system in, described fuel tank also is provided with fuel outlet valve, level meter and air-strainer.
Above-mentioned a kind of low-high pressure soft starting hydraulic oil source system in, described low-high pressure soft starting module and high pressure filter between the bypass parallel connection be provided with pressure transducer and accumulator.
Above-mentioned a kind of low-high pressure soft starting hydraulic oil source system in, the hydraulic fluid port of described accumulator is provided with stop valve.
Above-mentioned a kind of low-high pressure soft starting hydraulic oil source system in, be provided with solenoid directional control valve between the control port of described main pump and the filler opening of pressure regulator valve, the filler opening of described solenoid directional control valve is connected with the control port of main pump, described solenoid directional control valve must not when electricity oil outlet be connected with fuel tank, get that oil outlet is connected with the filler opening of pressure regulator valve when electric.
Remarkable result of the present invention is: set up on the basis of prior art of the present invention low-the high pressure soft starting module, can reduce the pressure pulse that high-voltage oil liquid causes components such as all pipelines in the system high pressure loop and valves, effectively reduce peak value of pulse, thereby reduce the impact to each element in the system, operational safety improves greatly; Simultaneously the impact of the sealing configuration of the original design of system also greatly reduced, prevented that effectively the part that impact noise and hydraulic oil source cause from revealing, greatly increased the working life of hydraulic oil source.
Further, the control port of main pump again with after pressure regulator valve is connected, can reduce the working loss of main pump by solenoid directional control valve, increases its working life.
Further, bypass is installed in parallel pressure transducer and accumulator between low-high pressure soft starting module and high pressure filter, pressure that can the real-time measurement system high-voltage tube and absorb the pressure pulsation that main pump produces, thereby further stable high voltage pipe output oil liquid pressure.
Description of drawings
Fig. 1 be a kind of low-high pressure soft starting hydraulic oil source system schematic;
Among the figure: 1. fuel tank; 2. fuel outlet valve; 3. level meter; 4. air-strainer; 5. butterfly valve; 6. low-pressure hose; 7. main pump; 8. motor; 9. high pressure hose; 10. one-way valve; 11. high pressure filter; 12. solenoid directional control valve; 13. pressure regulator valve; 14. stop valve; 15. pressure transducer; 16. accumulator; 17. throttle valve; 18. accumulator; 19. hydraulic control precursor overflow valve; 20. return filter; 21. cooler; 22. system high pressure pipe; 23. system oil return pipe; 24. low-the high pressure soft starting module.
Embodiment
Below in conjunction with drawings and the specific embodiments the present invention is described in further detail.
As shown in Figure 1, of the present invention low-high pressure soft starting hydraulic oil source system comprises the main pump 7 that is driven by motor 8, the control port X of main pump 7 is connected with the filler opening of solenoid directional control valve 12, described solenoid directional control valve 12 is two-position three-way valves, wherein must not when electricity oil outlet be connected with fuel tank 1, get that oil outlet is connected with the filler opening of pressure regulator valve 13 when electric.The oil outlet of described pressure regulator valve is connected with fuel tank 1.
The control port X of described main pump 1 is the directly filler opening of pressure regulator valve 13 connection also.But again with after pressure regulator valve 13 is connected, can reduce the working loss of main pump 7 by solenoid directional control valve 12, increase its working life.
The inlet port of main pump 7 is connected to the inlet port of fuel tank 1 by low-pressure hose 6 and butterfly valve 5, fuel outlet valve 2, level meter 3 and air-strainer 4 are installed on the described fuel tank 1.The return opening of described fuel tank 1 is connected with cooler and is connected with system oil return pipe 23 by return filter 20 successively.
The high pressure hydraulic fluid port of main pump 7 is connected with high pressure filter by high pressure hose 9, one-way valve 10 and is connected with system high pressure pipe 22.
Low-high pressure soft starting module 24 is installed between system oil return pipe 23 and system high pressure pipe 22, described low-high pressure soft starting module 24 comprises hydraulic control precursor overflow valve 19, its filler opening is connected with system high pressure pipe 22, unloading port is connected with system oil return pipe 23, described hydraulic control precursor overflow valve 19 is the hydraulic control precursor overflow valve 19 of externally controlled type, therefore is connected with throttle valve by accumulator 18 at the external control hydraulic fluid port of described hydraulic control precursor overflow valve 19 to be connected with system high pressure pipe 22.
Also can between low-high pressure soft starting module 24 and high pressure filter 11, bypass be installed in parallel pressure transducer 15 and accumulator 16, for the ease of the maintenance of accumulator 16, can stop valve 14 be installed at the hydraulic fluid port of accumulator 16.If adopt this mounting type, the pressure that pressure transducer 15 can real-time measurement system high-voltage tube 22, accumulator 16 can absorb the pressure pulsation that main pump 7 produces, and further the stable high voltage pipe is exported oil liquid pressure.
Working procedure is as follows:
Pressure regulator valve 13 can be set a target pressure value before work, starting electrical machinery 8, and this moment, solenoid directional control valve 12 must not be electric, and the fluid of the control port X of main pump 7 unloads oil sump tank 1 by solenoid directional control valve 12.System high pressure pipe 22 is not have high-voltage oil liquid output at this moment.Solenoid directional control valve 12 must be electric afterwards, and main pump 7 is started working in the bringing onto load state, and main pump 7 begins to export high-voltage oil liquid.This moment is in low-high pressure soft starting module 24, because the accumulation of energy effect of accumulator 18 and the damping function of throttle valve 17, fluid boosts slowly at accumulator 18 and throttle valve 17 place pipelines, along with this loine pressure rises gradually, the pressure that hydraulic control precursor overflow valve 19 spools are opened rises thereupon, if pressure surpasses the pressure of accumulator 18 and throttle valve 17 place pipelines in the system high pressure pipe 22, then hydraulic control precursor overflow valve 19 spools are opened, with the discharge degree of system high pressure pipe 22.Therefore, system high pressure pipe 22 pressure are along with the pressure of accumulator 18 and throttle valve 17 place pipelines rising gradually, until the pressure of accumulator 18 and throttle valve 17 place pipelines rises to the target pressure value that described pressure regulator valve 13 is set, hydraulic control precursor overflow valve 19 spools are closed, stop discharge degree in the system high pressure pipe 22, finish whole soft start-up process, begin normal operation.
For example the goal pressure of pressure regulator valve 13 is made as 21Mpa, and when hydraulic oil source was opened, motor 8 drove the high-voltage oil liquid of main pump 7 output 21MPa.Hydraulic control this moment precursor overflow valve 19 external control hydraulic fluid ports do not have pressure, and the spool of hydraulic control precursor overflow valve 19 is opened, the whole overflows of fluid, and the pressure of system high pressure pipe 22 can not raise.Loine pressure moment between simultaneity factor high-voltage tube 22 and the throttle valve 17 is elevated to 21MPa.Because the damping effect of throttle valve 17, throttle valve 17 front and back fluid form a pressure difference, throttle valve 17 to the pressure in the pipeline between the accumulator 18 relatively slow rise to not enough 21MPa from 0, the oil port pressure that is accumulator 18 rises to not enough 21MPa from 0, accumulator 18 begins to store high-voltage oil liquid, therefore cause the loine pressure rising between accumulator 18 and the hydraulic control precursor overflow valve 19, and the control port place pressure rising of hydraulic control precursor overflow valve 19.Along with the rising of pressure herein, the cracking pressure of hydraulic control precursor overflow valve 19 begins to raise, and main valve plug is closed, and system stops overflow, and system pressure increases consistent with the pressure of control port place of hydraulic control precursor overflow valve 19.When accumulator 18 stopped to store high-voltage oil liquid, the pressure in accumulator 18 and the throttle valve 17 place pipelines also stopped to change gradually, is fixed on 21MPa.The cracking pressure of hydraulic control this moment precursor overflow valve 19 is 21MPa.So far low-high pressure soft starting is finished, and system begins normal operation, and the compression shock major part when oil sources starts is eliminated, and component is not hit substantially in the system.
Claims (5)
1. one kind low-high pressure soft starting hydraulic oil source system, it comprises system high pressure pipe (22) and the system oil return pipe (23) that is connected with fuel tank (1) respectively, described low-high pressure soft starting hydraulic oil source system also comprises main pump (7), the control port of described main pump (7) is connected with the filler opening of pressure regulator valve (13), and the oil outlet of pressure regulator valve (13) is connected with fuel tank (1); The inlet port of described main pump (7) is connected 5 by low-pressure hose (6) with butterfly valve) be connected with the inlet port of fuel tank (1), the high pressure hydraulic fluid port of described main pump (7) is connected 11 by high pressure hose (9), one-way valve 10 with high pressure filter) be connected with system high pressure pipe (22); The return opening of described fuel tank (1) is connected 21 by return filter (20) with cooler successively) be connected with system oil return pipe (2) 3; It is characterized in that: be provided with low-high pressure soft starting module (24) between described system oil return pipe (23) and the system high pressure pipe 22, described low-high pressure soft starting module (24) comprises hydraulic control precursor overflow valve (19), cross accumulator (18) and throttle valve (17), hydraulic control precursor overflow valve (19) filler opening is connected with system high pressure pipe (22), hydraulic control precursor overflow valve (19) unloading port is connected with system oil return pipe (23), is connected 17 by accumulator (18) with throttle valve on the external control hydraulic fluid port of described hydraulic control precursor overflow valve (19)) be connected with system high pressure pipe (22).
As claimed in claim 1 a kind of low-high pressure soft starting hydraulic oil source system, it is characterized in that: described fuel tank (1) also is provided with fuel outlet valve (2), level meter (3) and air-strainer (4).
As claimed in claim 1 or 2 a kind of low-high pressure soft starting hydraulic oil source system, it is characterized in that: described low-high pressure soft starting module (24) and high pressure filter (11) between the bypass parallel connection be provided with pressure transducer (15) and accumulator (16).
As claimed in claim 3 a kind of low-high pressure soft starting hydraulic oil source system, it is characterized in that: the hydraulic fluid port of described accumulator (16) is provided with stop valve (14).
As claimed in claim 1 or 2 a kind of low-high pressure soft starting hydraulic oil source system, it is characterized in that: be provided with solenoid directional control valve (12) between the filler opening of the control port of described main pump (7) and pressure regulator valve (13), the filler opening of described solenoid directional control valve (12) is connected with the control port of main pump (7), described solenoid directional control valve (12) must not when electricity oil outlet be connected with fuel tank (1), get that oil outlet is connected with the filler opening of pressure regulator valve (13) when electric.
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| CN201310221316.9A CN103321975B (en) | 2013-06-05 | 2013-06-05 | A kind of low-high pressure soft start hydraulic oil source system |
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| CN201310221316.9A CN103321975B (en) | 2013-06-05 | 2013-06-05 | A kind of low-high pressure soft start hydraulic oil source system |
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| CN103321975B CN103321975B (en) | 2016-08-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107630839A (en) * | 2017-10-25 | 2018-01-26 | 北京富力通达科技有限公司 | A kind of hydraulic pressure soft starting device and its application method |
| CN108037014A (en) * | 2017-12-08 | 2018-05-15 | 北京强度环境研究所 | A kind of multimedium ultralow pressure pressure-loaded pilot system |
| CN108386401A (en) * | 2018-04-17 | 2018-08-10 | 迪斯油压工业(昆山)有限公司 | Hydraulic press quick response system |
| CN109139614A (en) * | 2017-06-27 | 2019-01-04 | 比亚迪股份有限公司 | The fueller of engineering truck |
| CN110454447A (en) * | 2019-08-29 | 2019-11-15 | 湘潭市恒欣实业有限公司 | A kind of closed type hydraulic system of accumulator speed regulation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139614A (en) * | 2017-06-27 | 2019-01-04 | 比亚迪股份有限公司 | The fueller of engineering truck |
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| CN107630839A (en) * | 2017-10-25 | 2018-01-26 | 北京富力通达科技有限公司 | A kind of hydraulic pressure soft starting device and its application method |
| CN108037014A (en) * | 2017-12-08 | 2018-05-15 | 北京强度环境研究所 | A kind of multimedium ultralow pressure pressure-loaded pilot system |
| CN108386401A (en) * | 2018-04-17 | 2018-08-10 | 迪斯油压工业(昆山)有限公司 | Hydraulic press quick response system |
| CN108386401B (en) * | 2018-04-17 | 2023-11-28 | 迪斯油压工业(昆山)有限公司 | Quick response system of oil press |
| CN110454447A (en) * | 2019-08-29 | 2019-11-15 | 湘潭市恒欣实业有限公司 | A kind of closed type hydraulic system of accumulator speed regulation |
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