CN207762060U - A kind of overhead working truck system - Google Patents
A kind of overhead working truck system Download PDFInfo
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- CN207762060U CN207762060U CN201721853574.9U CN201721853574U CN207762060U CN 207762060 U CN207762060 U CN 207762060U CN 201721853574 U CN201721853574 U CN 201721853574U CN 207762060 U CN207762060 U CN 207762060U
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Abstract
The utility model is related to a kind of overhead working truck systems, including：Load-reacting pump, load-sensitive valve, Bidirectional balanced valve, rotary motor, executing agency, fuel tank；Pressure detecting mouth in executing agency is connected to the shuttle valve in Bidirectional balanced valve, and load-sensitive valve includes proportional reversing valve, pressure-compensated valve, solenoid directional control valve, overflow valve, check valve, and the utility model has the characteristics that：Load pressure signal can feed back to load-reacting pump by load-sensitive oil circuit, and load-reacting pump can adjust the flow that the flow of outlet is needed with electromagnetic proportional valve and be consistent；The utility model, which realizes, does not generate extra flow in hydraulic system, do not generate more power dissipations, reduce the fever of system；To efficiently reduce overhead working truck system flow loss during the work time and thermal losses, reach energy-saving effect.
Description
Technical field
The utility model is related to the present invention relates to a kind of straight arm type operation vehicle hydraulic systems, more particularly to a kind of straight arm type
High-altitude operation vehicle load-sensitive hydraulic system.
Background technology
The hydraulic system of existing high-altitude operation vehicle is to control Full Vehicle System by one group of series connection gear pump, and system pressure is
It is determined by the load acted in operating mechanism.To limit the maximum working pressure of system, it is necessary to a high pressure kicks be arranged
Valve.When system working pressure reaches setting value, the almost whole flows of gear pump will flow back to fuel tank by overflow valve, thus lead to pole
High power loss, and generating a large amount of thermal losses in systems causes system effectiveness extremely low.
Invention content
The purpose of the utility model is to overcome above-mentioned deficiency in the prior art, providing a kind of can reduce high-altitude operation vehicle
The load-sensitive hydraulic system of energy loss in the course of work.To achieve the above object, the present invention provides following technical schemes：
A kind of overhead working truck system, including：Load-reacting pump, load-sensitive valve, Bidirectional balanced valve, revolution
Motor, executing agency, fuel tank；
Pressure detecting mouth in the executing agency is connected to the shuttle valve in the Bidirectional balanced valve, the load-sensitive valve
Including proportional reversing valve, pressure-compensated valve, solenoid directional control valve, overflow valve, check valve.
Further, the oil inlet of load-reacting pump is connected to filter device, the filter device it is another
End is connected with the oil outlet of the fuel tank, a control of the oil outlet of the load-sensitive valve and load-reacting pump
Donsole is connected.
Further, the outlet of check valve is connected with the control interface of the variable pump in the load-sensitive valve, overflow
One end oil outlet of valve is connected with oil inlet pipe.
Further, the proportional reversing valve is operated proportional flow control valve, and the proportional reversing valve can be to the revolution horse
Proportional flow control is carried out up to oil inlet and oil return when positive and negative rotation.
Further, the oil inlet of the pressure-compensated valve is connected to the oil outlet of the proportional reversing valve, the pressure
The outlet of recuperation valve is also communicated with load feedback oil circuit.
Further, the solenoid directional control valve is three-position four-way electromagnetic directional valve, and oil inlet is mended with the pressure respectively
The load feedback oil communication for repaying valve and the pressure-compensated valve is gone here and there on the load feedback oil circuit being connected to the pressure-compensated valve
It is associated with check valve, the oil outlet of the oil outlet of the solenoid directional control valve as load-sensitive valve.
Further, the Bidirectional balanced valve includes shuttle valve, and the Bidirectional balanced valve has pressurize and absorbing external impact
Effect.
The utility model also provides a kind of high-altitude operation vehicle, including walking mechanism, jack up unit, chassis and any technology
The high-altitude operation vehicle load-sensitive hydraulic system that scheme is provided.
High-altitude operation vehicle pressure system described in the utility model can be adjusted according to the variation real-time regulating system pressure of load
Flow needed for section system, to efficiently reduce overhead working truck system flow loss during the work time and heat waste
Consumption, reaches energy-saving effect.
Load-reacting pump hydraulic system used by the high-altitude operation vehicle is applicable not only to solve working at height turner
Flow loss and the thermal losses for making platform, apply also for it is other need it is energy saving and to the thermo-responsive higher liquid of security requirement
In pressure system, thus its scope of application is very wide.
Description of the drawings
Attached drawing is to be used to provide further understanding of the present invention, an and part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Attached drawing 1 show a kind of schematic diagram of overhead working truck system of the utility model.
Reference sign：
In figure：1, sensitive variable pump 2, load-sensitive valve 3, balanced valve 4, rotary motor 5, executing agency 6, oil are carried
Case
Specific implementation mode
The utility model is described in detail below with reference to attached drawing and in conjunction with the embodiments.It should be noted that not rushing
In the case of prominent, the features in the embodiments and the embodiments of the present application can be combined with each other.
As shown in Figure 1, the utility model discloses a kind of overhead working truck system, including load-reacting pump 1,
Load-sensitive valve 2, balanced valve 3, rotary motor 4, executing agency 5, fuel tank 6.Pressure detecting mouth in executing agency 5 and shuttle valve 31
Connection, load-sensitive valve 2 include proportional reversing valve 21, pressure-compensated valve 22, solenoid directional control valve 23, overflow valve 24, check valve
25。
Wherein load-reacting pump 1 oiler be connected with the oil outlet of fuel tank, load-reacting pump 1 it is fuel-displaced
Mouth is connected with a control mouth of load-reacting pump 1.The outlet of check valve 25 becomes with load-sensitive in load-sensitive valve 2
The control interface of amount pump 1 is connected, and the oil inlet end of load-reacting pump 1 is connected with filter device, the other end of filter device
The oil outlet of connected tank 4, overflow valve 24 is connected with fuel tank 4, plays pressure limiting pressure maintaining effect.
Load force suffered by each executing agency is continually changing when high-altitude operation vehicle operation, in speed regulating control, it would be desirable that
Speed is not influenced by load pressure variation, can indicate to come speed governing, in system as shown in Figure 1, pressure compensation by the manipulation of people
22 left end oil outlet of valve acts on the maximum load pressure from the preferential shuttle valve selection of high pressure.
The proportional reversing valve 21 is solenoid-operated proportional flow control valve, when proportional reversing valve 1 is operated in left position or right position,
Oil inlet is connected to its control mouth, proportioning valve opening size according to provide mutually in requisition for flow, compared with the prior art
Middle gear pumps not extra flow and generates, and not will produce excessive Flux Loss.
The oil inlet of pressure-compensated valve 22 is connected to the oil outlet of proportional reversing valve 23, spring cavity by detect oil circuit with
The oil inlet of proportional reversing valve 21 is connected to, and load feedback oil circuit is equipped with check valve 25 in load-sensitive valve 2；Pressure-compensated valve 22
Effect be the pressure size no matter loaded, can guarantee consistent by the flow of 3 both sides oil circuit of Bidirectional balanced valve, do not loaded
Influence, it is unrelated with load pressure.
Solenoid directional control valve 23 is three-position four-way electromagnetic directional valve, and the oil outlet of solenoid directional control valve 23 is as load-sensitive valve 2
Oil outlet；The load feedback oil communication of its oil inlet and pressure-compensated valve 22 and pressure-compensated valve 22.
During solenoid directional control valve 23 works when position, oil inlet and outlet disconnects in system, load-reacting pump 1 and execution
The access of working oil path is ended, and working oil path is connected to by hydraulic fluid port with fuel tank, which pumps with load-reacting
1 is in a kind of equilibrium state that low pressure is standby.
When 23 left and right working position of solenoid directional control valve, hydraulic fluid port is connected to oil outlet.When 23 left side of solenoid directional control valve obtains electric,
When left position works, hydraulic oil is by shuttle valve 4 and feeds back oil circuit and feeds back to the negative of pressure-compensated valve 22 and load-reacting pump 1
Control port is carried, original balance is broken at this time, and the hydraulic oil for feeding back to the load control port of load-reacting pump 1 promotees
The discharge capacity of load-reacting pump 1 is set to become larger, load-reacting pump 1 then starts to load-sensitive valve 2 supply pressure oil.Work as electricity
When 23 right side of magnetic reversal valve obtains electric, when right position works, executive component 5 is run in the opposite direction, is finally reached balance, work
It is similar with the above process to make process, details are not described herein again, and Bidirectional balanced valve 3 further includes shuttle valve 31, Bidirectional balanced valve 3 have pressurize with
The effect of absorbing external impact.
Load-reacting pump 1 is just started to work, and load pressure P is small at this time, the load-sensitive pressure on load-sensitive valve 2
PL is less than load-reacting and pumps 1 outlet pressure PS, and pressure-compensated valve 22 works in left position, load-sensitive in load-sensitive valve 2
Variable pump 1 provides pressure oil by load-sensitive valve 2 to rotary motor 4, and rotary motor 4 drives executing agency 5 to rise, will put down
Platform jacks up.
After start-up operation, the pressure PL on load-sensitive valve 2 is equal to load-reacting and pumps 1 outlet pressure PS, and load is quick
Solenoid directional control valve 3 is operated in middle position in sense valve 2, and 2 oil inlet and outlet of load-sensitive valve disconnects, and load-reacting pump 1 is not
To 4 fuel feeding of rotary motor, 5 height of executing agency remains unchanged；
When increasing weight on platform, end pressure increases on rotary motor 4, and load pressure P increases, on load-sensitive valve 2
Load-sensitive pressure PL be more than load-reacting pump 1 outlet pressure PS, while monitor PL point pressures be more than check valve 25
Opening pressure, and feed back to load-reacting pump 1 load control port so that load-reacting pump 1 output displacement
Become larger, so that system is controlled pressure-compensated valve 22 in load-sensitive valve 2 and work in left position, variable pump 1 persistently provides executing agency 5 work
The flow of work.
When platform unloads, end pressure reduces in executing agency 5, and the load pressure P of rotary motor 4 reduces, load-sensitive
Load-sensitive pressure PL on valve 5 is less than load-reacting and pumps 1 outlet pressure PS, proportional reversing valve 21 in load-sensitive valve 2
Spool moves right, and reduces flowexit, and load-reacting pump 1 provides flow to rotary motor 4 by load-sensitive valve 2 and subtracts
It is small, it follows the variation of load and changes.
Load pressure signal can feed back to load-reacting pump 1 by load-sensitive oil circuit, and load-reacting pumps 1 meeting
The flow that the flow exported is needed with electromagnetic proportional valve 21 is adjusted to be consistent.Load-reacting pump 1, which only provides, in this way is
It unites required flow and pressure, does not generate extra flow, do not generate more power dissipations, reduce the energy consumption hair of system
Heat.
Hydraulic system, which is one kind, used by the utility model high and medium Operation Van can be widely used in various engineering machines
HYDRAULIC CONTROL SYSTEM mode on tool.The great advantage of this system is to according to load responsive to load variable pump
Control is adjusted, to ensure that the power of pump output can hinder good utilization, does not largely reduce power not
Energy loss caused by matching obtains good energy-saving effect；Load sensitive system is usually quick by the needs control load of load
The output flow for feeling variable pump, makes system reach energy-efficient effect.
Load sensitive system hydraulic system has the advantages that discharge capacity is adjustable, and the range that discharge capacity is adjusted can be from minimum injection rate to most
Huge discharge, or even positive maximum pump discharge is to reversed maximum pump discharge；And it is not necessary that overflow valve is separately arranged again in work system.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of overhead working truck system, which is characterized in that including：Load-reacting pump (1), load-sensitive valve (2),
Bidirectional balanced valve (3), rotary motor (4), executing agency (5), fuel tank (6)；
Pressure detecting mouth in the executing agency (5) is connected to the shuttle valve (31) in the Bidirectional balanced valve, and the load is quick
It includes proportional reversing valve (21), pressure-compensated valve (22), solenoid directional control valve (23), overflow valve (24), check valve to feel valve (2)
(25)。
2. overhead working truck system according to claim 1, which is characterized in that the load-reacting pumps (1)
Oil inlet be connected to filter device, the other end of the filter device is connected with the oil outlet of the fuel tank (6), described negative
The control mouth that the oil outlet of load sensitive valve (2) pumps (1) with the load-reacting is connected.
3. overhead working truck system according to claim 2, which is characterized in that single in the load-sensitive valve (2)
It is connected to the outlet of valve (25) with the control interface of the variable pump (1), one end oil outlet and the oil inlet pipe phase of overflow valve (24)
Connection.
4. overhead working truck system according to claim 2, which is characterized in that the proportional reversing valve (21) be than
Example flow control valve, the oil inlet and oil return when proportional reversing valve can be to the rotary motor (4) positive and negative rotation carry out proportional flow control
System.
5. overhead working truck system according to claim 2, which is characterized in that the pressure-compensated valve (22) into
Hydraulic fluid port is connected to the oil outlet of the proportional reversing valve (21), and the outlet of the pressure-compensated valve (22) is also communicated with load feedback
Oil circuit.
6. overhead working truck system according to claim 5, which is characterized in that the solenoid directional control valve (23) is three
Position four-way electromagnetic reversing valve, oil inlet are anti-with the load of the pressure-compensated valve (22) and the pressure-compensated valve (22) respectively
Oil communication is presented, check valve (25), the electromagnetism are in series on the load feedback oil circuit being connected to the pressure-compensated valve (22)
Oil outlet of the oil outlet of reversal valve (23) as load-sensitive valve (2).
7. overhead working truck system according to claim 2, which is characterized in that the Bidirectional balanced valve (3) includes
Shuttle valve (31), the Bidirectional balanced valve (3) play the role of pressurize and are impacted with absorbing external.
8. a kind of high-altitude operation vehicle, it is characterised in that any including walking mechanism, jack up unit, chassis and claim 1-7
The overhead working truck system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721853574.9U CN207762060U (en) | 2017-12-26 | 2017-12-26 | A kind of overhead working truck system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721853574.9U CN207762060U (en) | 2017-12-26 | 2017-12-26 | A kind of overhead working truck system |
Publications (1)
| Publication Number | Publication Date |
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| CN207762060U true CN207762060U (en) | 2018-08-24 |
Family
ID=63184686
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|---|---|---|---|
| CN201721853574.9U Active CN207762060U (en) | 2017-12-26 | 2017-12-26 | A kind of overhead working truck system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578352A (en) * | 2019-01-28 | 2019-04-05 | 徐工消防安全装备有限公司 | Load sensitive system and aerial work platform |
| CN110864017A (en) * | 2018-08-27 | 2020-03-06 | 河南森源重工有限公司 | Hydraulic control system and snow melting vehicle |
| CN112324728A (en) * | 2020-10-10 | 2021-02-05 | 湖南星邦智能装备股份有限公司 | Hydraulic system capable of preventing high temperature |
| CN112796689A (en) * | 2021-02-03 | 2021-05-14 | 江苏中煤矿山设备有限公司 | Pressure-adjustable pump truck for punching and drilling |
| CN112833058A (en) * | 2021-01-21 | 2021-05-25 | 长沙中联重科环境产业有限公司 | Load-sensitive hydraulic system and hedge trimming equipment |
| CN113833701A (en) * | 2021-09-07 | 2021-12-24 | 徐州徐工挖掘机械有限公司 | Hydraulic system of rotary machine |
| CN114215799A (en) * | 2022-02-21 | 2022-03-22 | 徐州徐工环境技术有限公司 | Load-sensitive constant-power hydraulic system for vertical pressure station |
| CN115045876A (en) * | 2022-06-14 | 2022-09-13 | 三一汽车起重机械有限公司 | Control method of synchronous hydraulic system, counterweight synchronous hydraulic system and crane |
| CN115992841A (en) * | 2022-12-08 | 2023-04-21 | 重庆大学 | Flow self-compensating load-sensitive pump valve coordinated electro-hydraulic system and control method |
-
2017
- 2017-12-26 CN CN201721853574.9U patent/CN207762060U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110864017A (en) * | 2018-08-27 | 2020-03-06 | 河南森源重工有限公司 | Hydraulic control system and snow melting vehicle |
| CN109578352A (en) * | 2019-01-28 | 2019-04-05 | 徐工消防安全装备有限公司 | Load sensitive system and aerial work platform |
| CN112324728A (en) * | 2020-10-10 | 2021-02-05 | 湖南星邦智能装备股份有限公司 | Hydraulic system capable of preventing high temperature |
| CN112833058A (en) * | 2021-01-21 | 2021-05-25 | 长沙中联重科环境产业有限公司 | Load-sensitive hydraulic system and hedge trimming equipment |
| CN112796689A (en) * | 2021-02-03 | 2021-05-14 | 江苏中煤矿山设备有限公司 | Pressure-adjustable pump truck for punching and drilling |
| CN113833701A (en) * | 2021-09-07 | 2021-12-24 | 徐州徐工挖掘机械有限公司 | Hydraulic system of rotary machine |
| CN114215799A (en) * | 2022-02-21 | 2022-03-22 | 徐州徐工环境技术有限公司 | Load-sensitive constant-power hydraulic system for vertical pressure station |
| CN115045876A (en) * | 2022-06-14 | 2022-09-13 | 三一汽车起重机械有限公司 | Control method of synchronous hydraulic system, counterweight synchronous hydraulic system and crane |
| CN115992841A (en) * | 2022-12-08 | 2023-04-21 | 重庆大学 | Flow self-compensating load-sensitive pump valve coordinated electro-hydraulic system and control method |
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