CN201420667Y - Servo hydraulic pump station structure with by-pass unloading - Google Patents
Servo hydraulic pump station structure with by-pass unloading Download PDFInfo
- Publication number
- CN201420667Y CN201420667Y CN200920057498XU CN200920057498U CN201420667Y CN 201420667 Y CN201420667 Y CN 201420667Y CN 200920057498X U CN200920057498X U CN 200920057498XU CN 200920057498 U CN200920057498 U CN 200920057498U CN 201420667 Y CN201420667 Y CN 201420667Y
- Authority
- CN
- China
- Prior art keywords
- oil
- servo
- oil return
- load
- oil pump
- 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
Abstract
The utility model relates to a servo hydraulic pump station structure with by-pass unloading. A servo motor controls an oil pump and a main oil path which is output from an oil tank of an oil pump station, wherein the main oil path is provided with an oil return unloading branch which is connected back to the oil tank, and a direction switching valve and a manual adjusting flow valve are arrangedin the oil return unloading branch in a serial manner. The servo hydraulic pump station structure is provided with a by-pass unloading device with simple as well as easy structure; under the conditions of not adding a servo controller, not increasing power of a servo motor and not changing the structure as well as control mode of the oil pump, the servo hydraulic pump station structure realizes that the servo motor can drive the oil pump to normally run under the condition of high-pressure load by utilizing the method of reducing delivery capacity of the oil pump through by-pass unloading.
Description
Technical field
The utility model relates to a kind of servo-hydraulic pumping plant, and relating in particular to when the servo-hydraulic pumping plant not to have the servo-hydraulic pumping plant structure with bypass off-load under the specific (special) requirements situation at high-pressure work and to flow.
Background technique
Traditional injection machine solves the mode that high moment of torsion occurs with the servo-hydraulic pumping plant under high-pressure situations: the power that one, strengthens actuating motor and servocontroller; Two, the oil pump of driven by servomotor adopts the two-stage pump form, and the big pump with two-stage pump when occurring needing the high-pressure low-flow situation switches to the reduction that little pump is realized oil pump capacity, thereby avoids the appearance of high torque condition.
The shortcoming of first kind of structure is: the cost of actuating motor is closely bound up with power, and the increase of actuating motor and servo controller power will cause equipment cost sharply to raise, and is unfavorable for the promotion and application of energy-saving servo technology in Hydraulic Field;
The shortcoming of second kind of structure is: the oil pump to servo-drive has proposed requirements at the higher level, owing to be converted into the big or small two-stage oil pump of use from single pump, has increased the production and the manufacture cost of oil pump.Need switch oil pump and wait for pressure response on controlling because when high torque condition occurring, the response time increase that pressure is raise has reduced the equipment utilization efficiency.
Therefore, be necessary to improve for the above defective of existing servo-hydraulic pumping plant.
The model utility content
The technical problems to be solved in the utility model provides a kind of servo-hydraulic pumping plant structure with bypass off-load, the utlity model has bypass relief arrangement simple for structure, do not increasing servocontroller and actuating motor power and do not changing under the situation of oil pump structure and control mode, the mode that reduces oil pump capacity by the bypass off-load realizes the normal operation of driven by servomotor oil pump under the high-voltage load situation.
For solving the problems of the technologies described above, a kind of servo-hydraulic pumping plant structure of the present utility model with bypass off-load, the oil pump of actuating motor control, working connection from exporting by the oil pump station fuel tank, wherein: described working connection is provided with back the oil return off-load branch road that is coupled to fuel tank, and string is provided with direction switching valve and hand adjustment Flow valve in the described oil return off-load branch road.
After the utility model adopts said structure, include the hand adjustment Flow valve by setting, the oil return off-load branch road of direction switching valve, when needing high pressure, servo hydraulic control system make servo-hydraulic pumping plant working connection between fuel tank, have the oil return off-load, thereby the part hydraulic oil of realizing working connection is directly got back in the fuel tank by hand adjustment Flow valve and direction switching valve, directly reduced the discharge capacity of oil pump by the mode of bypass off-load, guaranteed that the power of actuating motor and servocontroller can not transship under the situation of high torque demand when system occurs, efficiently solved the difficult problem of system's moment of torsion deficiency under high-pressure situations.
The further improvement project of the utility model:
The above-mentioned servo-hydraulic pumping plant structure with bypass off-load, described oil return off-load prop up two parallel connections of route, by the oil return handoff leg of direction switching valve switching controls, described hand adjustment Flow valve is arranged on wherein in the oil return branch road.When servo hydraulic control system needs high pressure, the part hydraulic oil of realizing working connection by the direction switching valve switches to by the hand adjustment Flow valve or directly gets back in the middle of the fuel tank two kinds of loop unloading ways that servo hydraulic control system needs high pressure that recirculating oil quantity is done restriction or do not limited through the direction switching valve.
Dust collecting system of the present utility model has compact structure, rationally distributed, clears up easy technique effect.
Description of drawings
Below in conjunction with the specific embodiment in the accompanying drawing the utility model is described in further detail, but does not constitute any restriction of the present utility model.
Fig. 1 is the structural representation of a kind of specific embodiment of the utility model.
Among the figure: 1 is fuel tank, and 2 is oil pump, and 3 is actuating motor, and 4 is working connection, and 5 are oil return off-load branch road, and 6 is the direction switching valve, and 7 are the hand adjustment Flow valve.
Embodiment
As shown in Figure 1, a kind of servo-hydraulic pumping plant structure with bypass off-load, actuating motor 3 servo-controlled oil pumps 2, working connection 4 from exporting by oil pump station fuel tank 1, working connection 4 is provided with back the oil return off-load branch road 5 that is coupled to fuel tank 1, and string is provided with direction switching valve 6 and hand adjustment Flow valve 7 in the described oil return off-load branch road 5.
Embodiment 1
Be arranged on direction switching valve 6 front sides by the backflow direction by hand adjustment Flow valve 7 in the oil return off-load branch road 5 of connection working connection 4, when when servo hydraulic control system needs high pressure, needing the oil return off-load, thereby energising of direction switching valve and hired roughneck transfer the part hydraulic oil of Flow valve 7 realization working connections directly to get back in the fuel tank 1 by hand adjustment Flow valve 7 and direction switching valve 6, thereby directly reduced the discharge capacity of oil pump by the mode of bypass off-load, guaranteed that the power of actuating motor and servocontroller can not transship under the situation of high torque demand when system occurs.
Embodiment 2
Oil return off-load branch road 5 switches the oil return handoff leg of 6 controls by two parallel connections, by the direction switching valve, hand adjustment Flow valve 7 is arranged on wherein in the oil return branch road, when servo hydraulic control system needed the high pressure recirculating oil quantity to do restriction, 6 energisings of direction switching valve switched to the recirculating oil quantity of regulating oil sump tank 1 in the oil return branch road of establishing hand adjustment Flow valve 7.When servo hydraulic control system needed the high pressure recirculating oil quantity not limit, direction switching valve 6 energising switched in the oil return branch road of another direct oil return and directly gets back to fuel tank 1.
In sum, the utility model is as specification and diagramatic content, makes actual sample and through repeatedly use test, from the effect of use test, provable the utility model can reach the purpose that it is expected, practical value is unquestionable.Above illustrated embodiment only is used for conveniently illustrating the utility model, be not that the utility model is done any pro forma restriction, have in the technical field under any and know the knowledgeable usually, if in the scope that does not break away from technical characteristics that the utility model is carried, utilize technology contents that the utility model discloses to do the local equivalent embodiment who changes or modify, and do not break away from technical characteristics content of the present utility model, all still belong in the scope of the utility model technical characteristics.
Claims (2)
1. servo-hydraulic pumping plant structure with bypass off-load, the oil pump of actuating motor control, working connection from exporting by the oil pump station fuel tank, it is characterized in that: described working connection is provided with back the oil return off-load branch road that is coupled to fuel tank, and string is provided with direction switching valve and hand adjustment Flow valve in the described oil return off-load branch road.
2. the servo-hydraulic pumping plant structure with bypass off-load according to claim 1, it is characterized in that: described oil return off-load props up two parallel connections of route, by the oil return handoff leg of direction switching valve switching controls, and described hand adjustment Flow valve is arranged on wherein in the oil return branch road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920057498XU CN201420667Y (en) | 2009-05-31 | 2009-05-31 | Servo hydraulic pump station structure with by-pass unloading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920057498XU CN201420667Y (en) | 2009-05-31 | 2009-05-31 | Servo hydraulic pump station structure with by-pass unloading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201420667Y true CN201420667Y (en) | 2010-03-10 |
Family
ID=41807319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920057498XU Expired - Fee Related CN201420667Y (en) | 2009-05-31 | 2009-05-31 | Servo hydraulic pump station structure with by-pass unloading |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201420667Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511400A (en) * | 2013-10-16 | 2014-01-15 | 宁波圣龙汽车动力系统股份有限公司 | Device and method for detecting performance of functional valves in oil pump of automatic gearbox |
| CN110098631A (en) * | 2018-01-31 | 2019-08-06 | 新疆金风科技股份有限公司 | DC transmission system and its discharging circuit and unloading method |
-
2009
- 2009-05-31 CN CN200920057498XU patent/CN201420667Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103511400A (en) * | 2013-10-16 | 2014-01-15 | 宁波圣龙汽车动力系统股份有限公司 | Device and method for detecting performance of functional valves in oil pump of automatic gearbox |
| CN103511400B (en) * | 2013-10-16 | 2015-12-02 | 宁波圣龙汽车动力系统股份有限公司 | The method for testing performance of the duty valve in oil pump for automatic transmission |
| CN110098631A (en) * | 2018-01-31 | 2019-08-06 | 新疆金风科技股份有限公司 | DC transmission system and its discharging circuit and unloading method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102296665B (en) | Excavator hydraulic system carrying load sensing main valve and positive flow pump | |
| CN102168540B (en) | Hydraulic pumping unit with pressure compensation device | |
| CN202165337U (en) | Hydraulic power system of energy-saving servo variable pump | |
| CN102182730A (en) | Movable arm flow re-generation system with potential energy recovery device for excavator | |
| CN103174688A (en) | Hydraulic energy-saving system | |
| CN103062140B (en) | Hydraulic device on basis of confluence control mode | |
| CN108591144B (en) | Hydraulic system of motor-driven double-dosing pump double-accumulator distributed direct-drive excavator | |
| CN104452868B (en) | Double-hydraulic-cylinder mixed drive control system | |
| CN106223391A (en) | A kind of excavator energy regenerating and utilize system | |
| CN101768990A (en) | Hydraulic constant power control device for excavator | |
| CN102943500A (en) | Energy-saving control method of hydraulic negative flow of excavator | |
| CN1815040A (en) | Concrete pump hydraulic system auxiliary energy-storage flow-increasing device (2) | |
| CN201420667Y (en) | Servo hydraulic pump station structure with by-pass unloading | |
| CN208330867U (en) | A kind of distributed direct drive excavator hydraulic system of servo motor driving bivariate pump | |
| CN2808533Y (en) | Hydraulic press with instant voltage build-up function | |
| CN2610133Y (en) | Quantitative variable confluent system of loader | |
| CN201526548U (en) | Hydraulic double-pump power driving device | |
| CN109267599A (en) | The excavator dynamical system that distributed two parallel pumps directly drive | |
| CN103711172B (en) | The quantitative combining hydraulic system of loader four pump | |
| CN201606318U (en) | Servo hydraulic power system | |
| CN2751168Y (en) | Energy-saving accelerating system for big-diameter hydraulic cylinder | |
| CN107503997A (en) | Back pressure and the double actuator systems of power matching hydraulic hybrid regulation and control | |
| CN201606319U (en) | Energy-saving servo hydraulic power system | |
| CN202658654U (en) | Hydraulic pump power control device of excavator | |
| CN1815041A (en) | Concrete pump hydraulic system auxiliary energy-storage flow-increasing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100310 Termination date: 20160531 |