CN207195328U - A kind of portable low noise hydraulic power supply - Google Patents
A kind of portable low noise hydraulic power supply Download PDFInfo
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- CN207195328U CN207195328U CN201721072198.XU CN201721072198U CN207195328U CN 207195328 U CN207195328 U CN 207195328U CN 201721072198 U CN201721072198 U CN 201721072198U CN 207195328 U CN207195328 U CN 207195328U
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Abstract
A kind of portable low noise hydraulic power supply is the utility model is related to, belongs to hydraulic transmission and control field.The utility model may be implemented under specific operation, the pressure piping oil port of hydraulic power supply does not have flow output using bleed-off circuit is increased on the basis of original pressure, flow binary channels closed-loop control hydraulic power supply；Meanwhile make the pump case surface temperature rise of electrical modulation hydraulic control variable displacement axial plunger pump slower, pump service life can be extended；The noise grade of hydraulic power supply can also be reduced.
Description
Technical field
A kind of portable low noise hydraulic power supply is the utility model is related to, belongs to hydraulic transmission and control field.
Background technology
It is existing for the detection on the ground of aviation aircraft hydraulic system, the mobile hydraulic power source safeguarded, its
Structure is to use electrical modulation hydraulic control variable displacement axial plunger pump and pressure, flow binary channels closed-loop control, using the structure
Have the following disadvantages：1st, when input flow rate signal value of zero, output pressure are definite value（21MPa）During signal, at crescent gear pump
Under unloading condition, plunger pump swash plate is swung near zero-bit, and now hydraulic power supply pipeline oil port has low discharge hydraulic oil
Liquid exports；2nd, due to the above-mentioned low discharge pressure related to the plug number and pump input speed of plunger pump plunger shaft（Flow）Pulsation, the pressure
Power（Flow）Pulsation is in above-mentioned specific operation（Belong to one kind of regulation operating mode）Check valve produces periodically at lower initiation pump discharge
Noise；3rd, pump case surface temperature rise can be caused very fast, and then influences the service life of pump.
The content of the invention
The utility model is aiming above mentioned problem, there is provided one kind is in input flow rate signal value of zero, pressure set points signal
When, the pressure piping oil port of hydraulic power supply does not have flow output, and pump case surface temperature rise is slower, can reduce hydraulic power supply and make an uproar
A kind of portable low noise hydraulic power supply of sound grade.
To achieve the above object, the utility model uses following scheme：A kind of portable low noise hydraulic power supply, including
Fuel tank, pressure piping, return line, connection pressure piping, the first connecting pipeline and the second connecting pipeline of return line, pressure
Coarse filter, electrical modulation hydraulic control variable displacement axial plunger pump, check valve I, flowmeter are serially connected with pipeline（Flow sensing
Device）, in check valve I and flowmeter（Flow sensor）Between pressure piping on be provided with pressure meter switch, pressure gauge and pressure
Force snesor；Crescent gear pump, check valve II are parallel between coarse filter and pressure meter switch；Set on first connecting pipeline
Electromagnetic relief valve, proportional pressure control valve are equipped with, proportional pressure control valve is the pilot valve of electromagnetic relief valve, the first connecting pipeline and pressure pipe
The connected one end in road is arranged on pressure sensor and flowmeter（Flow sensor）Between；It is provided with the second connecting pipeline of stop valve
Both ends are separately positioned near the P hydraulic fluid ports of pressure piping and the T hydraulic fluid ports of return line；The outlet of crescent gear pump and fuel tank it
Between be parallel with electromagnetic switch seat valve I, its structural feature is to be provided with the side in parallel with proportional pressure control valve on the first connecting pipeline
Road throttle circuit.
Be arranged in series on bleed-off circuit throttling stop valve, choke valve, fixed damping hole or plug, fixer resistance hole or
Fill in one of them and electromagnetic switch seat valve II.
Electrical modulation hydraulic control variable displacement axial plunger pump connects with crescent gear pump coaxial rigid, with motor elasticity
Connection.
Electrical modulation hydraulic control variable displacement axial plunger pump leads to respectively with check valve I, crescent gear pump and check valve II
Flexible pipe is crossed to be connected；Can be with shock insulation noise reduction, reduction pressure fluctuation and impact.
The utility model also includes circulation cooling circuit, and circulation cooling circuit includes cooling circuit motor, vane pump, mistake
Filter I, filter II, the cooler of electric fan cooling, the check valve with back-moving spring for playing safe valve action, manual switching
Valve I, manual switching valve II, the cooler and filter I of the electric fan cooling are arranged on return line, are sequentially connected in series
Manual switching valve I, filter II, cooling circuit check valve, vane pump, manual switching valve II are in parallel with cooler, filter I,
Cooling circuit motor is connected with vane pump, and one end of pipeline where the check valve with back-moving spring is arranged on filter I, cooling
Between the check valve of loop, its other end is connected with fuel tank.
The outlet of electrical modulation hydraulic control variable displacement axial plunger pump is provided with pump and preloads valve；Pump, which preloads valve, can ensure electric tune
Hydraulic control variable displacement axial plunger pump processed has regulating power all the time.
Utility model beneficial effect
When the maximum working pressure of crescent gear pump is set in into 31.5MPa, by electrical modulation hydraulic control variable displacement axle
21MPa, crescent gear pump and electrical modulation hydraulic control variable displacement axial plunger pump are set in plunger pump maximum working pressure
Collaborated respectively after check valve II and check valve I from fuel tank oil suction, hydraulic oil by coarse filter, and it is oily from the P of pressure piping
Mouth output.Pressure meter switch and pressure gauge, pressure sensor and the flowmeter installed on pressure piping（Flow sensor）, it is used for
The parameter such as detection, the pressure on feedback pressure pipeline, flow, so that electrical modulation hydraulic control variable displacement axial plunger pump can be with shape
Into pressure, flow binary channels closed-loop control.Electromagnetic relief valve is used for the maximum working pressure of initialization system（31.5MPa）；Ratio
Overflow valve is used to set the other each stage pressures of below 31.5MPa（Also can continuously set）；Electromagnetic relief valve also has off-load simultaneously
Function.The independent off-load of crescent gear pump can be made by electromagnetic switch seat valve I.The first communicating pipe near P hydraulic fluid ports and T hydraulic fluid ports
The stop valve set on road is used for pressure piping off-load, pressure release, the output quantity of electrical modulation hydraulic control variable displacement axial plunger pump
（Pressure and flow）It is to be controlled by deviation signal.Output pressure 21MPa, output flow are being set as 0 and crescent gear pump
Under off-load this specific operation, the now deviation signal determined by loop control theory can not always be 0, cause electrical modulation liquid
The swash plate of voltage-controlled variable displacement axial plunger pump processed is swung near zero-bit, has the output of low discharge hydraulic oil liquid, part pulsation
Low discharge can only by check valve I, no matter using which kind of Opening pressure check valve, it can all trigger noise.Using bypass
It can suitably increase above-mentioned low discharge to throttle circuit, avoid triggering electrical modulation hydraulic control variable displacement axial plunger pump exit
The noise of check valve I, reduce the overall noise grade of the hydraulic power supply；And by bleed-off circuit by the partial discharge
Draw, avoid P hydraulic fluid ports from having the output of low discharge hydraulic oil liquid.Throttling stop valve on bleed-off circuit can adjust even nothing and let out
Leakage is closed.Under this specific operation, the temperature of hydraulic oil does not have anomalous variation, and pump case surface temperature rise increases also because of flushing flow rate
Slow down or reduced, extended the service life of hydraulic pump.Circulation cooling circuit can reduce oil temperature.
Brief description of the drawings
Fig. 1 is hydraulic principle sketch of the present utility model；
Fig. 2 is that electrical modulation hydraulic control variable displacement axial plunger pump preloads valve connection diagram with pump.
Reference：1st, fuel tank；2nd, coarse filter；3rd, motor；4th, shaft coupling；5th, electrical modulation hydraulic control variable displacement axle
To plunger pump；6th, crescent gear pump；7th, electromagnetic switch seat valve I；8th, check valve I；9th, check valve II；10th, pressure meter switch；
11st, pressure gauge；12nd, proportional pressure control valve；13rd, electromagnetic relief valve；14th, pressure sensor；15th, throttling stop valve；16th, electromagnetic switch
Seat valve II；17th, flowmeter（Flow sensor）；18th, pressure piping hydraulic fluid port（P hydraulic fluid ports）；19th, stop valve；20th, return line hydraulic fluid port
（T hydraulic fluid ports）；21st, manual switching valve I；22nd, the cooler of electric fan cooling；23rd, filter I；24th, filter II；25th, band is multiple
The check valve of position spring；26th, cooling circuit check valve；27th, vane pump；28th, flexible pipe；29th, cooling circuit motor；30th, hand
Dynamic switching valve II；31st, the second connecting pipeline；32nd, the first connecting pipeline；33rd, pressure piping；34th, circulation cooling circuit；35th, return
Oil pipe line；36th, bleed-off circuit；37th, pump preloads valve.
Embodiment
As shown in figure 1, a kind of portable low noise hydraulic power supply include fuel tank 1, pressure piping 33, return line 35,
Bleed-off circuit 36, circulation cooling circuit 34.Coarse filter 2, electrical modulation hydraulic control variable are serially connected with pressure piping 33
Formula axial plunger pump 5, check valve I 8, flowmeter（The appellation of hydraulic pressure angle, flow sensor are the appellation of electric angle）17.
Check valve I 8 and flowmeter（Flow sensor）Pressure meter switch 10 and pressure gauge 11 are serially connected with except being provided between 17, is also set
It is equipped with pressure sensor 14.Crescent gear pump 6, check valve II 9 and the electrical modulation hydraulic control variable displacement axial plunger of series connection
Pump 5, check valve I 8 are connected in parallel between pressure meter switch 10 and coarse filter 2.Electrical modulation hydraulic control variable displacement axial plunger pump 5
It is connected respectively by flexible pipe 28 with check valve II 9 with check valve I 8, crescent gear pump 6.Electrical modulation hydraulic control variable displacement axle
It is connected to plunger pump 5 with the coaxial rigid of crescent gear pump 6, passes through the elastic connection of shaft coupling 4 with motor 3.In pressure piping
The connecting pipeline 31 of the first connecting pipeline 32 and second connecting the two has been arranged in parallel between 33 and return line 35.Second connection
Stop valve 19 is provided with pipeline 31, the both ends of the second connecting pipeline 31 are separately positioned on the P hydraulic fluid ports 18 of pressure piping 33 and returned
Near the T hydraulic fluid ports 20 of oil pipe line 35.The electromagnetism overflow for proportional pressure control valve 12 is provided with first connecting pipeline 32, being installed in parallel
Valve 13, proportional pressure control valve 12 are the pilot valve of electromagnetic relief valve 13, and the first connecting pipeline 32 is set with the junction of pressure piping 33
In pressure sensor 14 and flowmeter（Flow sensor）Between 17.Gone here and there on bleed-off circuit 36 in parallel with proportional pressure control valve 12
Join throttling stop valve 15 and electromagnetic switch seat valve II 16, the throttling stop valve 15 of bleed-off circuit 36 can also be by throttling
Valve, fixed damping hole or plug, fixer hinder one of hole or plug and substitute throttling stop valve 15.Circulation cooling circuit 34 wraps
Include cooling circuit motor 29, vane pump 27, filter II 24, filter I 23, the cooler 22 of electric fan cooling, a peace
The check valve 25 with back-moving spring, manual switching valve I 21, the manual switching valve II 30 acted on entirely, the cooling of electric fan cooling
Device 22 and filter I 23 are arranged on return line, manual switching valve I 21, filter II 24, the cooling circuit list being sequentially connected in series
, the cooling circuit in parallel with cooler 22 that electric fan cools down, filter I 23 to valve 26, vane pump 27, manual switching valve II 30
Motor 29 is connected with vane pump 27, and one end of the place pipeline of check valve 25 with back-moving spring is arranged on filter II 24 and cold
But on the pipeline between loop check valve 26, its other end is connected with fuel tank 1, and security can be improved using said structure.It is interior
An electromagnetic switch seat valve I 7 also in parallel between the output end of intermeshing gear pump 6 and fuel tank 1, can be that crescent gear pump 6 unloads
Lotus.As shown in Fig. 2 the output end of electrical modulation hydraulic control variable displacement axial plunger pump 5, which can be provided with pump, preloads valve 37, pump preloads
Valve 37 can be all the time（Including under no-load condition）Make electrical modulation hydraulic control variable displacement axial plunger pump 5 that there is regulating power.
In use, the T hydraulic fluid ports 20 on the P hydraulic fluid ports 18 and return line 35 on pressure piping 33 and external flight device are connected
Connect, if it does not have leakage situation when doing pressure test to aircraft（Flowmeter or flow sensor 17 can show this feelings
Condition）, then also it is not to trigger check valve I 8 to produce noise；If aircraft has leakage, pass through the hydraulic oil liquid of check valve I 8
Flow increases, and check valve I 8 will not more produce noise.In input flow rate signal value of zero, pressure set points（Such as 21MPa）During signal,
Can power off electromagnetic switch seat valve II 16（Or dead electricity）, the low discharge of the output of electrical modulation hydraulic control variable displacement axial plunger pump 5
Cooler 22 that hydraulic oil liquid can cool down via throttling stop valve 15, electromagnetic switch seat valve II 16, electric fan etc. returns to fuel tank
1, the purpose of cooling hydraulic oil can be achieved.
Claims (6)
1. a kind of portable low noise hydraulic power supply, including fuel tank, pressure piping, return line, connection pressure piping, oil return
The first connecting pipeline and the second connecting pipeline of pipeline, coarse filter, electrical modulation hydraulic control variable are serially connected with pressure piping
Formula axial plunger pump, check valve I, flowmeter, pressure gauge is provided with the pressure piping between check valve I and flowmeter and is opened
Pass, pressure gauge and pressure sensor；Crescent gear pump, check valve II are parallel between coarse filter and pressure meter switch；The
Electromagnetic relief valve, proportional pressure control valve are provided with a connecting pipe road, proportional pressure control valve is the pilot valve of electromagnetic relief valve, and first connects
The siphunculus road one end that is connected with pressure piping is arranged between pressure sensor and flowmeter；It is provided with the second communicating pipe of stop valve
Road both ends are separately positioned near the P hydraulic fluid ports of pressure piping and the T hydraulic fluid ports of return line；The outlet of crescent gear pump and fuel tank
Between be parallel with electromagnetic switch seat valve I, it is characterised in that the bypass in parallel with proportional pressure control valve is provided with the first connecting pipeline
Throttle circuit.
A kind of 2. portable low noise hydraulic power supply as claimed in claim 1, it is characterised in that the bleed-off circuit
On be arranged in series throttling stop valve, choke valve, fixed damping hole or plug, fixer resistance hole or fill in one of them and electromagnetic switch
Seat valve II.
A kind of 3. portable low noise hydraulic power supply as claimed in claim 1, it is characterised in that the electrical modulation hydraulic pressure control
Variable displacement axial plunger pump processed connects with crescent gear pump coaxial rigid, with motor elastic connection.
A kind of 4. portable low noise hydraulic power supply as claimed in claim 1, it is characterised in that the electrical modulation hydraulic pressure control
Variable displacement axial plunger pump processed is connected by flexible pipe respectively with check valve I, crescent gear pump with check valve II.
A kind of 5. portable low noise hydraulic power supply as described in claim 1,3 or 4, it is characterised in that the electrical modulation liquid
The outlet of voltage-controlled variable displacement axial plunger pump processed is provided with pump and preloads valve.
A kind of 6. portable low noise hydraulic power supply as claimed in claim 1, it is characterised in that including circulation cooling circuit,
The circulation cooling circuit includes cooling circuit motor, vane pump, filter I, filter II, the cooling of electric fan cooling
Device, the check valve with back-moving spring, manual switching valve I, the manual switching valve II for playing safe valve action, the electric fan cooling
Cooler and filter I be arranged on return line, manual switching valve I, filter II, the cooling circuit being sequentially connected in series are unidirectional
Valve, vane pump, manual switching valve II are in parallel with cooler, filter I, and cooling circuit motor is connected with vane pump, and band resets
One end of pipeline is arranged between filter I, cooling circuit check valve where the check valve of spring, its other end and fuel tank phase
Even.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721072198.XU CN207195328U (en) | 2017-08-25 | 2017-08-25 | A kind of portable low noise hydraulic power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721072198.XU CN207195328U (en) | 2017-08-25 | 2017-08-25 | A kind of portable low noise hydraulic power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207195328U true CN207195328U (en) | 2018-04-06 |
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ID=61794926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721072198.XU Active CN207195328U (en) | 2017-08-25 | 2017-08-25 | A kind of portable low noise hydraulic power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207195328U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350707A (en) * | 2020-02-29 | 2020-06-30 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic system and method for power test of explosion-proof diesel engine |
-
2017
- 2017-08-25 CN CN201721072198.XU patent/CN207195328U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350707A (en) * | 2020-02-29 | 2020-06-30 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic system and method for power test of explosion-proof diesel engine |
| CN111350707B (en) * | 2020-02-29 | 2022-04-12 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic system and method for power test of explosion-proof diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A mobile low noise hydraulic power source Effective date of registration: 20230116 Granted publication date: 20180406 Pledgee: China Construction Bank Corporation Shenyang Zhongshan Sub-branch Pledgor: SHENYANG HERO FLUID CONTROL SYSTEM CO.,LTD. Registration number: Y2023210000008 |