CN208900435U - A kind of efficient duplex pump power unit - Google Patents
A kind of efficient duplex pump power unit Download PDFInfo
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- CN208900435U CN208900435U CN201821756547.4U CN201821756547U CN208900435U CN 208900435 U CN208900435 U CN 208900435U CN 201821756547 U CN201821756547 U CN 201821756547U CN 208900435 U CN208900435 U CN 208900435U
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- duplex pump
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Abstract
The utility model provides a kind of efficient duplex pump power unit, including motor, duplex pump, off-load solenoid valve, check valve assembly and pressure switch；The duplex pump is connected to motor, and the first press oil port of the duplex pump distinguishes the first check valve with the second press oil port and second one-way valve is connect, and first press oil port separates a branch and connect with off-load solenoid valve.The device can be avoided energy dissipation, avoids the service efficiency for influencing complete machine because of high pressure unloading, reduces use cost.
Description
Technical field
The utility model relates to hydraulic system technical field more particularly to a kind of efficient duplex pump power units.
Background technique
Hydraulic power unit is generally made of hydraulic power unit and control unit two large divisions, and hydraulic power unit is storehouse
The important component of equipment is stored up, performance superiority and inferiority and reliability are directly related to the market prospects and popularization degree of complete machine, especially
It is in storage facilities towards today of high efficiency, reliability and energy conservation transformation, how power unit be not significantly increased
Becoming highly efficient, energy saving on the basis of cost becomes key.
Currently, hydraulic power unit can substantially be divided into single pump and conventional duplex pump two major classes, single price that pumps is low, volume
It is small, in addition to volumetric efficiency loss, also without other energy dissipations the phenomenon that, but no matter load how much, as constant displacement pump, row
Amount can not change, and also result in it to promote the unicity of speed, influence the service efficiency of complete machine.Conventional duplex pump can solve
The certainly service efficiency problem under the lower operating condition of load, but after reaching certain load, low pressure large discharge pump can pass through overflow valve
Overflow is fallen, this results in very big energy dissipation, and the efficiency under high pressure operating condition can be made to become extremely low, seriously affects making when overloaded
Use efficiency.In this background, it is badly in need of that a new and effective power unit is wanted to guarantee making for conventional duplex pump low-voltage high-efficiency
In the case where obtaining satisfaction with operating condition, and the service efficiency under system high pressure is not influenced, and thoroughly solve energy waste problem.
Utility model content
In view of the above-mentioned problems, utility model provides a kind of efficient duplex pump power unit.
In order to reach the purpose, utility model is adopted the following technical scheme that
A kind of efficient duplex pump power unit characterized by comprising motor, duplex pump, off-load solenoid valve, check valve
Component and pressure switch；The duplex pump is connected to motor, and the first press oil port and the second press oil port of the duplex pump are distinguished
First check valve is connected with second one-way valve, and first press oil port separates a branch and connect with off-load solenoid valve.
As a preference, two oilers of the duplex pump are successively arranged fuel sucking pipe and filter outward.
As a preference, the oil outlet of first check valve and second press oil port are connect with overflow valve.
As a preference, the second one-way valve is connect with pressure switch, the pressure switch and the off-load electromagnetism
Valve electrical connection.
As a preference, further include solenoid valve and throttle valve, hydraulic oil is via the solenoid valve and the section when decline
It flows valve and flows into oil return box.
As a preference, the motor and the duplex pump are fixed on valve plate, the motor and the duplex pump
It is connected between gear pump by shaft coupling.
As a preference, the motor and the duplex pump are located at the valve plate two sides.
To sum up, compared with prior art, be the advantages of utility model: under low pressure complete machine can fast lifting, pass through pressure
Power switch accomplishes high pressure zero pressure off-load, avoids energy dissipation, avoids the service efficiency for influencing complete machine because of high pressure unloading, reduces
Use cost；Hydraulic system is more reasonable, reliable, stable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the hydraulic schematic diagram of the utility model.
Label in figure is as follows:
1. motor, 2. duplex pumps, 21. first press oil ports, 22. second press oil ports, 3. off-load solenoid valves, 4. unidirectional valve groups
Part, 41. first check valves, 42. second one-way valves, 5. pressure switches, 6. fuel sucking pipes, 7. filters, 8. overflow valves, 9. electromagnetism
Valve, 10. throttle valves, 11. fuel tanks, 12. valve plates, 13. shaft couplings.
Specific embodiment
Middle embodiment is described further utility model with reference to the accompanying drawing.
A kind of efficient duplex pump power unit as depicted in figs. 1 and 2, including motor 1, duplex pump 2, off-load solenoid valve 3,
Check valve assembly 4 and pressure switch 5；Duplex pump 2 is connect with motor 1, the first press oil port 21 of duplex pump 2 and the second press oil port
22 the first check valves 41 of difference and second one-way valve 42 connect, and the first press oil port 21 separates a branch and off-load solenoid valve 3 connects
It connects.Pressure oil enters piston cylinder by check valve and pushes piston rod to realize lifting functions, and hydraulic oil is reversed in oil cylinder when pressure maintaining
Check valve is locked, to realize pressure maintaining.
When pressure is no more than 12MPa, off-load solenoid valve 3 is disconnected, and all flows of duplex pump 2 fully enter system, provide
Power realizes fast lifting function；When pressure is greater than 12MPa, pressure signal is changed into electric signal by pressure switch 5, unloads
Charged magnet valve 3, which is powered, to be opened, and wherein a flow pumped realizes zero by the direct off-load oil return box 11 of off-load solenoid valve 3 to duplex pump 2
Pressure, zero loss off-load.
Two oilers of duplex pump 2 are successively arranged fuel sucking pipe 6 and filter 7 outward, to guarantee the cleannes of hydraulic oil.
The oil outlet of first check valve 41 and the second press oil port 22 are connect with overflow valve 8.When actual pressure be more than default pressure,
Pressure oil avoids overloading by 8 off-load oil return box 11 of overflow valve to protect whole system, and system pressure size is by adjusting screw
To set.
Second one-way valve 42 is connect with pressure switch 5, and pressure switch 5 is electrically connected with off-load solenoid valve 3.It further include solenoid valve
9 with throttle valve 10, hydraulic oil flows into oil return box 11 via solenoid valve 9 and throttle valve 10 when decline.When unloading, solenoid valve 9 passes through
Switch button obtains electric, realization decline function, and controls decrease speed by throttle valve 10, avoids speed runaway when overloaded.
Motor 1 and duplex pump 2 are fixed on valve plate 12, are connected between motor 1 and the gear pump of duplex pump 2 by shaft coupling 13
It connects.Motor 1 and duplex pump 2 are located at 12 two sides of valve plate.Motor 1 and duplex pump 2 pass through being bolted to for two M8 respectively
On valve plate 12, is connected between motor 1 and gear pump by shaft coupling 13, effectively reduce the weight and volume of whole system, make
Structure is more compact, and hydraulic system is more reliable, stablizes.
Described above is only the explanation to utility model, so that those of ordinary skill in the art's can completely implements we
Case, but be not the limitation to utility model, those skilled in the art are can according to need after reading this specification to this
Embodiment makes the modification of not creative contribution, these are all without creative modification, but as long as in utility model
All by the protection of Patent Law in scope of the claims.
Claims (7)
1. a kind of efficient duplex pump power unit characterized by comprising motor (1), duplex pump (2), off-load solenoid valve (3),
Check valve assembly (4) and pressure switch (5)；The duplex pump (2) connect with motor (1), the first pressure of the duplex pump (2)
The first check valve (41) and second one-way valve (42) are connect hydraulic fluid port (21) respectively with the second press oil port (22), first press oil port
(21) branch is separated to connect with off-load solenoid valve (3).
2. a kind of efficient duplex pump power unit according to claim 1, it is characterised in that: the two of the duplex pump (2)
A oiler is successively arranged fuel sucking pipe (6) and filter (7) outward.
3. a kind of efficient duplex pump power unit according to claim 1, it is characterised in that: first check valve (41)
Oil outlet and second press oil port (22) connect with overflow valve (8).
4. a kind of efficient duplex pump power unit according to claim 1, it is characterised in that: the second one-way valve (42)
It is connect with pressure switch (5), the pressure switch (5) is electrically connected with the off-load solenoid valve (3).
5. a kind of efficient duplex pump power unit according to claim 1, it is characterised in that: further include solenoid valve (9) with
Throttle valve (10), hydraulic oil flows into oil return box (11) via the solenoid valve (9) and the throttle valve (10) when decline.
6. a kind of efficient duplex pump power unit according to claim 1, it is characterised in that: the motor (1) with it is described
Duplex pump (2) is fixed on valve plate (12), passes through shaft coupling between the motor (1) and the gear pump of the duplex pump (2)
(13) it connects.
7. a kind of efficient duplex pump power unit according to claim 6, it is characterised in that: the motor (1) and described
Duplex pump (2) is located at the valve plate (12) two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821756547.4U CN208900435U (en) | 2018-10-29 | 2018-10-29 | A kind of efficient duplex pump power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821756547.4U CN208900435U (en) | 2018-10-29 | 2018-10-29 | A kind of efficient duplex pump power unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208900435U true CN208900435U (en) | 2019-05-24 |
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ID=66577022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821756547.4U Active CN208900435U (en) | 2018-10-29 | 2018-10-29 | A kind of efficient duplex pump power unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN208900435U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4071013A1 (en) * | 2021-04-08 | 2022-10-12 | ZF Friedrichshafen AG | Integration of service brake, parking brake and anti-tilt device |
-
2018
- 2018-10-29 CN CN201821756547.4U patent/CN208900435U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4071013A1 (en) * | 2021-04-08 | 2022-10-12 | ZF Friedrichshafen AG | Integration of service brake, parking brake and anti-tilt device |
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