CN207161416U - Hydraulic oil cylinder driving system for closed type hydraulic system - Google Patents
Hydraulic oil cylinder driving system for closed type hydraulic system Download PDFInfo
- Publication number
- CN207161416U CN207161416U CN201721001133.6U CN201721001133U CN207161416U CN 207161416 U CN207161416 U CN 207161416U CN 201721001133 U CN201721001133 U CN 201721001133U CN 207161416 U CN207161416 U CN 207161416U
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- valve
- hydraulic
- rod chamber
- overflow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 27
- 239000003921 oil Substances 0.000 claims abstract description 80
- 239000012530 fluid Substances 0.000 claims abstract description 29
- 239000002828 fuel tank Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 9
- 150000001875 compounds Chemical class 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model belongs to technical field of hydraulic, and in particular to a kind of hydraulic oil cylinder driving system for closed type hydraulic system.The hydraulic oil cylinder driving system includes driving valve group and slippage pump, driving valve group is provided with repairing hydraulic fluid port, overflow hydraulic fluid port, cylinder rod chamber pipe interface and oil cylinder rodless cavity pipe interface, repairing hydraulic fluid port is connected with slippage pump, overflow hydraulic fluid port is connected with fuel tank, cylinder rod chamber pipe interface and oil cylinder rodless cavity pipe interface are connected with the rod chamber and rodless cavity of oil cylinder respectively, when oil cylinder lifts, slippage pump can carry out repairing by repairing hydraulic fluid port for the rod chamber of oil cylinder, when oil cylinder declines, unnecessary hydraulic oil can flow back to fuel tank by overflow hydraulic fluid port and oil cylinder rodless cavity pipe interface in the rodless cavity of oil cylinder.By using the hydraulic oil cylinder driving system described in the utility model for closed type hydraulic system, the repairing and overflow effect to oil cylinder can be effectively completed, realizes the driving process completed by closed type hydraulic system to oil cylinder.
Description
Technical field
The utility model belongs to technical field of hydraulic, and in particular to a kind of hydraulic oil cylinder driving for closed type hydraulic system
System.
Background technology
Hydraulic system is divided into open system and closed system, and open system is by parts groups such as pump, banked direction control valves, motor or oil cylinders
Into by banked direction control valves control actuator, and open type pump is fuel-displaced by fuel tank oil suction, high-pressure mouth.
Closed system, closed circuit is also, is import UNICOM of the outlet directly with hydraulic pump of actuator, rather than oil return
Case.Enclosed pump have the characteristics that two-way output hydraulic pressure source, fast response time, air be not easily accessible, rotating speed it is higher.
In the prior art using it is most be closed system, but the characteristics of due in the structure of closed type hydraulic system, it is difficult to
Complete the driving process to oil cylinder.
Utility model content
The purpose of this utility model is to solve above-mentioned at least one problem, and the purpose is by following technology
What scheme was realized.
The utility model proposes a kind of hydraulic oil cylinder driving system for closed type hydraulic system, including driving valve group and
Slippage pump, the driving valve group are provided with repairing hydraulic fluid port, overflow hydraulic fluid port, cylinder rod chamber pipe interface and oil cylinder rodless cavity pipeline
Interface, the repairing hydraulic fluid port are connected with the slippage pump, and the overflow hydraulic fluid port is connected with fuel tank, and the cylinder rod chamber pipeline connects
Mouth and the oil cylinder rodless cavity pipe interface are connected with the rod chamber and rodless cavity of oil cylinder respectively, when the oil cylinder lifts, institute
Slippage pump is stated to be mended for the rod chamber of the oil cylinder by the repairing hydraulic fluid port and the cylinder rod chamber pipe interface
Oil, when the oil cylinder declines, the hydraulic oil that the rodless cavity of the oil cylinder is unnecessary can pass through the overflow hydraulic fluid port and the oil
Cylinder rodless cavity pipe interface flows back to fuel tank.
Further, it is described driving valve group include the first check valve, the second check valve, the 3rd check valve, the 4th check valve,
Reversal valve, pilot operated compound relief valve and overflow valve, first check valve, second check valve, the 3rd check valve and
4th check valve is linked in sequence successively forms loop and the flow direction for controlling the hydraulic oil in the driving valve group, described
Reversal valve is connected with the cylinder rod chamber pipe interface, when the oil cylinder declines, the pressure in the rod chamber of the oil cylinder
Oil can open the reversal valve, and the unnecessary hydraulic oil in the rodless cavity of the oil cylinder can be acted on by the reversal valve
The pilot operated compound relief valve, and ensure that the pilot operated compound relief valve can be turned in the presence of return pressure, completion pair
The flooding process of the closed type hydraulic system, the overflow valve block are used to ensure the safe pressure in the driving valve group.
Further, the reversal valve is 2/2-way reversal valve.
Further, it is additionally provided with overflow valve on the output circuit of the slippage pump.
Further, the setting pressure of the overflow valve is 30bar.
Further, balanced valve is additionally provided between the driving valve group and the oil cylinder, the balanced valve is used to prevent institute
The rod chamber for stating oil cylinder when oil cylinder declines is emptied.
By using the hydraulic oil cylinder driving system described in the utility model for closed type hydraulic system, by hydraulic circuit
It is middle that driving valve group is set and can effectively be completed the repairing to oil cylinder to drive the slippage pump of valve group repairing and overflow is made
With the driving process to oil cylinder is completed in realization by closed type hydraulic system.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to this practicality
New limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the hydraulic schematic diagram of the utility model embodiment；
Fig. 2 is the hydraulic schematic diagram that valve group is driven in Fig. 1.
Each mark represents as follows in accompanying drawing：
10：Drive valve group, 11：First check valve, 12：Second check valve, 13：3rd check valve, 14：4th check valve；
15：Reversal valve, 16：Pilot operated compound relief valve, 17：Overflow valve；
20：Slippage pump；
30：Hydraulic pump；
40：Oil cylinder；
50：Balanced valve；
H：Oil cylinder rodless cavity pipe interface, L：Cylinder rod chamber pipe interface, Y：Overflow hydraulic fluid port, B：Repairing hydraulic fluid port.
Embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although this public affairs is shown in accompanying drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.Conversely, there is provided these embodiments are to be able to be best understood from the disclosure, and can be by this public affairs
The scope opened completely is communicated to those skilled in the art.
Fig. 1 is the hydraulic schematic diagram of the utility model embodiment.Fig. 2 is the hydraulic schematic diagram that valve group is driven in Fig. 1.Such as figure
It is shown, the hydraulic oil cylinder driving system for closed type hydraulic system in the present embodiment, including driving valve group 10 and slippage pump 20, driving
Valve group is provided with repairing hydraulic fluid port B, overflow hydraulic fluid port Y, cylinder rod chamber pipe interface L and oil cylinder rodless cavity pipe interface H, repairing oil
Mouth B is connected with slippage pump 20, and overflow hydraulic fluid port Y is connected with fuel tank, cylinder rod chamber pipe interface L and oil cylinder rodless cavity pipe interface
H is connected with the rod chamber and rodless cavity of oil cylinder 40 respectively, and when oil cylinder 40 lifts, slippage pump 20 can pass through repairing hydraulic fluid port B, oil
Cylinder rod chamber pipe interface L is that the rod chamber of oil cylinder 40 carries out repairing, and when oil cylinder 40 declines, the rodless cavity of oil cylinder 40 can lead to
Cross oil cylinder rodless cavity pipe interface H and overflow hydraulic fluid port Y and carry out overflow.
In the present embodiment, hydraulic pump 30 uses bidirectional variable hydraulic pump, two ports of hydraulic pump 30 respectively with oil cylinder 40
Rod chamber be connected with the rodless cavity of oil cylinder 40, can timely complete lifting and decline to oil cylinder 40 by adjusting hydraulic pump
The switching of action.Driving valve group 10 is provided between the loop that the both ends of hydraulic pump 30 and oil cylinder 40 connect, wherein, drive valve group
10 carry out fuel feeding by slippage pump 20.
Specifically, the driving valve group 10 in the present embodiment includes the first check valve 11, the second check valve 12, the 3rd check valve
13rd, the 4th check valve 14, reversal valve 15, pilot operated compound relief valve 16 and overflow valve block 17, the first check valve 11, the second check valve
12nd, the 3rd check valve 13 and the 4th check valve 14 are linked in sequence successively forms loop and for controlling the hydraulic pressure in driving valve group 10
The flow direction of oil, reversal valve 15 are connected with cylinder rod chamber pipe interface L, and when oil cylinder 40 declines, reversal valve 15 is had by oil cylinder 40
Hydraulic oil in rod cavity is opened and turned on, and the hydraulic oil in closed type hydraulic system can act on pilot-operated type by reversal valve 15 and overflow
Valve 16 is flowed, and ensures that pilot operated compound relief valve 16 can be turned in the presence of return pressure, is completed to closed type hydraulic system
Flooding process, overflow valve block 17 can ensure drive valve group 10 in safe pressure.
In the lifting process of oil cylinder 40, slippage pump 20 carries out fuel feeding by repairing hydraulic fluid port B to driving valve group 10.Fluid leads to
Cross the first check valve 11 to flow at cylinder rod chamber pipe interface L, and finally flow into the rod chamber of oil cylinder 40, to having for oil cylinder 40
The flow of rod cavity is supplemented.Further, overflow valve, the setting pressure of overflow valve are additionally provided with the output circuit of slippage pump 20
It is 30bar.If now for oil cylinder 40 without in the case of maximum flow rate, the unnecessary flow of slippage pump 40 can pass through overflow valve stream
Oil return box.
During fluid is flowed at cylinder rod chamber pipe interface L by the first check valve 11, due to the 4th unidirectional
The back pressure of valve 14 is high-pressure side, so the 4th check valve 14 does not turn on.Due to being provided with conducting direction phase after the second check valve 12
The 3rd anti-check valve 13, therefore fluid will not also circulate, therefore the fluid that slippage pump 20 supplements is merely able to by the first check valve
11 return to the low-pressure side of enclosed pump 30 from the rod chamber side of oil cylinder 40.
Further, drive and balanced valve 50 is additionally provided between valve group 10 and oil cylinder 40, balanced valve 50 is used to prevent oil cylinder 40
Rod chamber be emptied.
During the decline of oil cylinder 40, balanced valve 50 is opened.The pressure of hydraulic pump 30 is connect by cylinder rod chamber pipeline
Mouth L enters driving valve group.Reversal valve 15 is opened, and system pressure acts on pilot operated compound relief valve 16, enables pilot operated compound relief valve 16
It is enough to be turned in the presence of return pressure.The hydraulic oil of the rodless cavity of oil cylinder 40 is flowed into by oil cylinder rodless cavity pipe interface H
Drive in valve group 10, and overflow oil port is flowed to by pilot operated compound relief valve 16, and finally flow back to fuel tank, complete flooding process.
Meanwhile if excess flow is excessive, then slippage pump 20 can also give low-pressure side repairing by the 4th check valve 14, it is ensured that enclosed
It is equal that pump enters outflow.
Further, the reversal valve 15 in the present embodiment is 2/2-way reversal valve.
The utility model also proposed a kind of closed type hydraulic system, be used for closed type hydraulic system including described above
Hydraulic oil cylinder driving system.
By using the hydraulic oil cylinder driving system described in the utility model for closed type hydraulic system, by hydraulic circuit
It is middle that driving valve group is set and can effectively be completed the repairing to oil cylinder to drive the slippage pump of valve group repairing and overflow is made
With the driving process to oil cylinder is completed in realization by closed type hydraulic system.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be with
The scope of the claims is defined.
Claims (6)
1. the hydraulic oil cylinder driving system for closed type hydraulic system, it is characterised in that including driving valve group and slippage pump, the driving
Valve group is provided with repairing hydraulic fluid port, overflow hydraulic fluid port, cylinder rod chamber pipe interface and oil cylinder rodless cavity pipe interface, the repairing oil
Mouthful be connected with the slippage pump, the overflow hydraulic fluid port is connected with fuel tank, the cylinder rod chamber pipe interface and the oil cylinder without
Rod cavity pipe interface is connected with the rod chamber and rodless cavity of oil cylinder respectively, and when the oil cylinder lifts, the slippage pump can lead to
Cross the repairing hydraulic fluid port and the cylinder rod chamber pipe interface and carry out repairing for the rod chamber of the oil cylinder, when under the oil cylinder
During drop, the hydraulic oil that the rodless cavity of the oil cylinder is unnecessary can pass through the overflow hydraulic fluid port and the oil cylinder rodless cavity pipe interface
Flow back to fuel tank.
2. the hydraulic oil cylinder driving system according to claim 1 for closed type hydraulic system, it is characterised in that the driving valve
Group includes the first check valve, the second check valve, the 3rd check valve, the 4th check valve, reversal valve, pilot operated compound relief valve and overflow
Valve, first check valve, second check valve, the 3rd check valve and the 4th check valve are linked in sequence structure successively
Into loop and for controlling the flow direction for driving the hydraulic oil in valve group, the reversal valve connects with the cylinder rod chamber pipeline
Mouth is connected, and when the oil cylinder declines, the pressure oil in the rod chamber of the oil cylinder can open the reversal valve, the oil cylinder
Rodless cavity in unnecessary hydraulic oil the pilot operated compound relief valve can be acted on by the reversal valve, and ensure the elder generation
Conduction overflow valve can be turned in the presence of return pressure, complete the flooding process to the closed type hydraulic system, institute
Overflow valve block is stated to be used to ensure the safe pressure in the driving valve group.
3. the hydraulic oil cylinder driving system according to claim 2 for closed type hydraulic system, it is characterised in that the reversal valve
It is 2/2-way reversal valve.
4. the hydraulic oil cylinder driving system for closed type hydraulic system according to any one of claim 1-3, it is characterised in that
Overflow valve is additionally provided with the output circuit of the slippage pump.
5. the hydraulic oil cylinder driving system according to claim 4 for closed type hydraulic system, it is characterised in that the overflow valve
Setting pressure be 30bar.
6. the hydraulic oil cylinder driving system for closed type hydraulic system according to any one of claim 1-3, it is characterised in that
Balanced valve is additionally provided between the driving valve group and the oil cylinder, the balanced valve is used to prevent the oil when oil cylinder declines
The rod chamber of cylinder is emptied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721001133.6U CN207161416U (en) | 2017-08-10 | 2017-08-10 | Hydraulic oil cylinder driving system for closed type hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721001133.6U CN207161416U (en) | 2017-08-10 | 2017-08-10 | Hydraulic oil cylinder driving system for closed type hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207161416U true CN207161416U (en) | 2018-03-30 |
Family
ID=61715924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721001133.6U Expired - Fee Related CN207161416U (en) | 2017-08-10 | 2017-08-10 | Hydraulic oil cylinder driving system for closed type hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207161416U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663437A (en) * | 2020-07-07 | 2020-09-15 | 山东交通学院 | Anti-overturning spherical support |
| CN113323936A (en) * | 2021-06-17 | 2021-08-31 | 湖州生力液压有限公司 | Cabin door hydraulic control device of grass bundling machine |
-
2017
- 2017-08-10 CN CN201721001133.6U patent/CN207161416U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663437A (en) * | 2020-07-07 | 2020-09-15 | 山东交通学院 | Anti-overturning spherical support |
| CN111663437B (en) * | 2020-07-07 | 2022-03-01 | 山东交通学院 | Anti-overturning spherical support |
| CN113323936A (en) * | 2021-06-17 | 2021-08-31 | 湖州生力液压有限公司 | Cabin door hydraulic control device of grass bundling machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106015137B (en) | A kind of multi-purpose hydraulic system | |
| CN101408107B (en) | Energy-saving type shield propulsion hydraulic system by using zone control | |
| CN104047912B (en) | The digital pump controlled hydraulic differential cylinder in self-powered source | |
| CN204041583U (en) | A kind of servo-closed type hydraulic differential device | |
| CN104632794A (en) | Electro-hydraulic servo system of direct drive type hydraulic hoist | |
| CN108591144B (en) | Distributed direct-drive excavator hydraulic system with motor-driven dual quantitative pumps and dual accumulators | |
| CN109139598A (en) | A kind of double valve-regulated load port separate control valves based on the compensation of machine hydraulic pressure difference | |
| CN208185095U (en) | Load port based on single side outlet throttling control valve group/discharge capacity autonomous control system | |
| CN207064366U (en) | A kind of multi output hydraulic power station | |
| CN105570203B (en) | One kind uses the united high-efficiency high-accuracy hydraulic control system of pump valve | |
| CN207161416U (en) | Hydraulic oil cylinder driving system for closed type hydraulic system | |
| CN208634118U (en) | Distributed direct-drive excavator hydraulic system with motor-driven dual quantitative pumps and dual accumulators | |
| CN201081889Y (en) | Middle and small horsepower tractor hydraulic pressure distributer | |
| CN104029366B (en) | The energy-conserving hydraulic control device of hydraulic injection molding machine | |
| CN203272291U (en) | Workpiece feeding rapid unloading loop | |
| CN105387015B (en) | Energy-conserving hydraulic valve | |
| CN108343649A (en) | Load port based on single side outlet throttling control valve group/discharge capacity autonomous control system | |
| CN205063484U (en) | Fluid pressure type stereo garage liquid accuse system | |
| CN208634123U (en) | Hydraulic excavator power system with dual-pump direct drive and differential fast-forward automatic switching | |
| CN203384136U (en) | Speed exchange circuit with parallel speed control valves | |
| CN201162738Y (en) | An energy-saving hydraulic control device for variable speed drive shield cutter head | |
| CN203230677U (en) | Automatic oil supplementing system of closed hydraulic cargo winch | |
| CN106122133B (en) | A kind of multistage rotating speed hydraulic control speed control loop of unit head and method | |
| CN206409452U (en) | A kind of hydraulic system for Walking Beam Furnace in Hot rolling Plant discharging mechanism | |
| CN205331095U (en) | Energy -saving hydraulic valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 261061 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee after: WEICHAI POWER Co.,Ltd. Patentee after: Weichai Hydraulic Transmission Co.,Ltd. Address before: 261061 no.197a, Fushou East Street, high tech Industrial Development Zone, Weifang City, Shandong Province Patentee before: WEICHAI POWER Co.,Ltd. Patentee before: LINDE HYDRAULICS (CHINA) Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180330 |