CN103032393A - Quasi-static loading hydraulic pump servo control device - Google Patents
Quasi-static loading hydraulic pump servo control device Download PDFInfo
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- CN103032393A CN103032393A CN201210544369XA CN201210544369A CN103032393A CN 103032393 A CN103032393 A CN 103032393A CN 201210544369X A CN201210544369X A CN 201210544369XA CN 201210544369 A CN201210544369 A CN 201210544369A CN 103032393 A CN103032393 A CN 103032393A
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- oil hydraulic
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- hydraulic
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Abstract
The invention discloses a quasi-static loading hydraulic pump servo control device, relates to the technical field of hydraulic system servo control technology and aims to solve the problems of complex structure, high energy consumption and low reliability of the prior art. The device comprises a motor, two hydraulic pumps and two hydraulic cylinders, wherein the hydraulic cylinders are connected in parallel in a staggering way; the hydraulic pumps are driven and controlled by an adjustable-speed motor; a throttle element is connected in parallel at outlets of the hydraulic pumps and is used for limiting the lowest rotation speed of the hydraulic pumps; the hydraulic pumps are connected with the hydraulic cylinders through oil pipes, so that output flow rate and the pressure of the hydraulic pumps flow to the hydraulic cylinders to drive the hydraulic cylinders to output speed; and a filter is connected between the hydraulic pumps and an oil tank. The aim of control is fulfilled by directly controlling the rotation speed of the motor, a hydraulic and electric control system is simplified, a hydraulic valve which is high in price is eliminated, the cost is reduced, and the reliability is improved; the flow rate is controlled according to the requirement of load, so that the energy-saving effect is good; and at the occasion of super-high pressure work, a super-high pressure control valve is not required.
Description
Technical field
The present invention relates to a kind of quasistatic and load the oil hydraulic pump Servocontrol device, belong to hydraulic system servo control technique field.
Background technique
Applying control force load than jogging speed as the work system of purpose, in hydraulic type static materials testing machine is the mechanical device of Typical Representative, use very extensive.Traditional hydraulic loaded work system all take oil hydraulic pump as energy source device, reaches the purpose that changes flow by changing discharge capacity, take servovalve, Proportional valve as control means, by the control of electrical control realization to load, speed etc.These guarantee that the measure structure of loading velocity and precision forms complexity, energy consumption is large, reliability is low, especially needs the occasion of long-term pressurize, and it is very large to consume energy.
Summary of the invention
The object of the invention is to propose a kind of quasistatic and load the oil hydraulic pump Servocontrol device, solve the problem that complex structure, energy consumption are large, reliability is low that prior art exists.
For achieving the above object, a kind of quasistatic loading oil hydraulic pump Servocontrol device of the present invention comprises motor, oil hydraulic pump and throttle element; Described two oil hydraulic pump misphase positions are in parallel, described two oil hydraulic pumps drive control by adjustable speed motor, the outlet port of described oil hydraulic pump throttle element in parallel, the minimum speed of restriction oil hydraulic pump, described oil hydraulic pump links to each other the output flow that makes oil hydraulic pump and pressure flow to oil hydraulic cylinder by oil pipe with oil hydraulic cylinder, drive described oil hydraulic cylinder output speed.
Be connected with filter between described oil hydraulic pump and the fuel tank.
Described oil hydraulic cylinder is piston cylinder, described oil hydraulic pump output terminal is communicated with the inlet opening P mouth of three position four-way directional control valve, the rodless cavity of described piston cylinder and rod chamber are communicated with two delivery outlets of three position four-way directional control valve respectively, the oil return inlet T mouth of described three position four-way directional control valve is communicated with fuel tank, the outlet port of described oil hydraulic pump pressure gauge with electric contact in parallel.
Described oil hydraulic cylinder is the single-column plug cylinder, and described oil hydraulic pump output terminal is communicated with described single-column plug cylinder cylinder barrel, and the gap oil between described plunger and the cylinder barrel flows back to fuel tank by oil pipe, the outlet port of described oil hydraulic pump pressure relay in parallel.
Described two oil hydraulic pump misphase position parallel connections are specially: two identical oil hydraulic pumps are in parallel, and described two oil hydraulic pump single spin-echos, rotating speed is identical, axle steer is opposite, the angular velocity omega of two oil hydraulic pumps
1+ ω
2=0.
Described oil hydraulic pump is axial piston pump, and the plunger number of described axial piston pump is odd number, the plunger that distributes on the pump housing of two axial piston pumps 180 ° of angles that are staggered in a circumferential direction.
Described oil hydraulic pump is crescent gear pump, and the number of teeth of the small gear of described crescent gear pump is odd number, the tooth distribution of the small gear of two crescent gear pumps 180 ° of angles that are staggered in a circumferential direction.
Described throttle element is throttle valve.
Beneficial effect of the present invention is: compared with prior art, a kind of quasistatic of the present invention loads the oil hydraulic pump Servocontrol device directly reaches the control target by the rotating speed of control motor purpose, simplifies hydraulic pressure and automatical control system, saves expensive hydrovalve, reduce cost, improve reliability; According to loading demand control uninterrupted, has preferably energy-saving effect; In the occasion that needs ultrahigh pressure work, need not the ultrahigh pressure control valve.
Description of drawings
Fig. 1 is the schematic diagram that oil hydraulic pump Servocontrol device of the present invention drives the motion of single-rod piston cylinder;
Fig. 2 is the schematic diagram that oil hydraulic pump Servocontrol device of the present invention drives the motion of single-column plug cylinder;
Fig. 3 is the phase place of axial piston pump of the present invention and turns to graph of a relation;
Fig. 4 is the phase place of crescent gear pump of the present invention and turns to graph of a relation;
Wherein: 1, fuel tank, 2, filter, 3, motor, 4, oil hydraulic pump, 5, three position four-way directional control valve, 6, pressure gauge with electric contact, 7, piston cylinder, 8, throttle valve, 9, the single-column plug cylinder, 10, pressure relay, 11, plunger, 12, the pump housing, 13, small gear.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
Embodiment one:
Referring to accompanying drawing 1, oil hydraulic pump Servocontrol device of the present invention comprises motor 3, oil hydraulic pump 4, selector valve 5, pressure gauge with electric contact 6, throttle valve 8, filter 2 and fuel tank 1, described two oil hydraulic pumps 4 misphase positions are in parallel, described two oil hydraulic pumps 4 drive control by adjustable speed motor 3, the outlet port of described oil hydraulic pump 4 throttle valve 8 in parallel, described oil hydraulic pump 4 links to each other the output flow that makes oil hydraulic pump 4 and pressure flow to oil hydraulic cylinder by oil pipe with oil hydraulic cylinder, drive described oil hydraulic cylinder output speed, be connected with filter 2 between described oil hydraulic pump 4 and the fuel tank 1.
Described oil hydraulic pump 4 is crescent gear pump or plunger pump.
Described oil hydraulic cylinder is piston cylinder 7, the output terminal of described oil hydraulic pump 4 is communicated with the inlet opening P mouth of three position four-way directional control valve 5, the rodless cavity of described piston cylinder 7 and rod chamber are communicated with two delivery outlets of three position four-way directional control valve 5 respectively, the oil return inlet T mouth of described three position four-way directional control valve 5 is communicated with fuel tank, the outlet port of described oil hydraulic pump 4 pressure gauge with electric contact 6 in parallel.
Described two oil hydraulic pumps, 4 misphase position parallel connections are specially: two identical oil hydraulic pump 4 parallel connections, and described two oil hydraulic pump 4 single spin-echos, rotating speed is identical, axle steer is opposite, the angular velocity omega of two oil hydraulic pumps 4
1+ ω
2=0.
Referring to accompanying drawing 3, described oil hydraulic pump 4 is axial piston pump, the plunger 11 that distributes on the pump housing 12 of 11, two axial piston pumps of uniform 7 plungers of the circumferencial direction of the pump housing 12 of the described axial piston pump 180 ° of angles that are staggered in a circumferential direction.
Referring to accompanying drawing 4, described oil hydraulic pump 4 is crescent gear pump, and the small gear 13 of described crescent gear pump has 7 gear teeth, the tooth distribution of the small gear 13 of two crescent gear pumps 180 ° of angles that are staggered in a circumferential direction.
Embodiment two:
Referring to accompanying drawing 2, present embodiment and embodiment's one difference is: described oil hydraulic cylinder is single-column plug cylinder 9, remove selector valve 5, described oil hydraulic pump 4 output terminals directly are communicated with described single-column plug cylinder 9 cylinder barrels, the plunger of described single-column plug cylinder and the gap oil between the cylinder barrel flow back to fuel tank 1 by oil pipe, and the outlet port of described oil hydraulic pump 4 pressure relay 10 in parallel is when surpassing setting pressure in system, cut off motor 3 power supplys, guarantee work safety.
More than be the specific embodiment of the present invention, but limitation of the present invention absolutely not.
Claims (8)
1. a quasistatic loads the oil hydraulic pump Servocontrol device, it is characterized in that, comprises motor (3), oil hydraulic pump (4) and throttle element; Described two oil hydraulic pumps (4) misphase position is in parallel, described two oil hydraulic pumps (4) drive control by adjustable speed motor (3), the outlet port of described oil hydraulic pump (4) described throttle element in parallel, the minimum speed of restriction oil hydraulic pump (4), described oil hydraulic pump (4) links to each other the output flow that makes oil hydraulic pump (4) and pressure flow to oil hydraulic cylinder by oil pipe with oil hydraulic cylinder, drive described oil hydraulic cylinder output speed.
2. a kind of quasistatic according to claim 1 loads the oil hydraulic pump Servocontrol device, it is characterized in that, is connected with filter (2) between described oil hydraulic pump (4) and the fuel tank (1).
3. a kind of quasistatic according to claim 1 loads the oil hydraulic pump Servocontrol device, it is characterized in that, described oil hydraulic cylinder is piston cylinder (7), the output terminal of described oil hydraulic pump (4) is communicated with the inlet opening P mouth of three position four-way directional control valve (5), the rodless cavity of described piston cylinder (7) and rod chamber are communicated with two delivery outlets of three position four-way directional control valve (5) respectively, the oil return inlet T mouth of described three position four-way directional control valve (5) is communicated with fuel tank, described oil hydraulic pump (4) outlet port pressure gauge with electric contact (6) in parallel.
4. a kind of quasistatic according to claim 1 loads the oil hydraulic pump Servocontrol device, it is characterized in that, described oil hydraulic cylinder is single-column plug cylinder (9), described oil hydraulic pump (4) output terminal is communicated with described single-column plug cylinder (9) cylinder barrel, the plunger of described single-column plug cylinder (9) and the gap oil between the cylinder barrel flow back to fuel tank (1) by oil pipe, the outlet port of described oil hydraulic pump (4) pressure relay (10) in parallel.
5. a kind of quasistatic according to claim 1 loads oil hydraulic pump (4) Servocontrol device, it is characterized in that, described two oil hydraulic pumps (4) misphase position parallel connection is specially: two identical oil hydraulic pumps (4) parallel connection, described two oil hydraulic pumps (4) single spin-echo, rotating speed is identical, axle steer is opposite, the angular velocity omega of two oil hydraulic pumps (4)
1+ ω
2=0.
6. a kind of quasistatic according to claim 5 loads the oil hydraulic pump Servocontrol device, it is characterized in that, described oil hydraulic pump (4) is axial piston pump, the number of the plunger of described axial piston pump (11) is odd number, the upper plunger (11) that distributes of the pump housing of two axial piston pumps (12) the 180 ° of angles that are staggered in a circumferential direction.
7. a kind of quasistatic according to claim 5 loads the oil hydraulic pump Servocontrol device, it is characterized in that, described oil hydraulic pump (4) is crescent gear pump, the number of teeth of the small gear of described crescent gear pump (13) is odd number, the tooth distribution of the small gear of two crescent gear pumps (13) the 180 ° of angles that are staggered in a circumferential direction.
8. the described a kind of quasistatic of any one loads the oil hydraulic pump Servocontrol device according to claim 1-7, it is characterized in that described throttle element is throttle valve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210544369XA CN103032393A (en) | 2012-12-14 | 2012-12-14 | Quasi-static loading hydraulic pump servo control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210544369XA CN103032393A (en) | 2012-12-14 | 2012-12-14 | Quasi-static loading hydraulic pump servo control device |
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| CN103032393A true CN103032393A (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210544369XA Pending CN103032393A (en) | 2012-12-14 | 2012-12-14 | Quasi-static loading hydraulic pump servo control device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156376A (en) * | 2015-08-20 | 2015-12-16 | 深圳市达丰科技有限公司 | Closed hydraulic servo loading system, hydraulic device and loading device |
| CN115875447A (en) * | 2023-01-09 | 2023-03-31 | 索特传动设备有限公司 | Hydraulic control system, gear shifting mechanism and engineering machinery |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0451274A1 (en) * | 1988-12-27 | 1991-10-16 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic controller |
| CN2201997Y (en) * | 1993-09-17 | 1995-06-28 | 中国石化上海金山实业公司 | Oil hydraulic apparatus for hydraulic elastic pipe expander |
| JP2010054204A (en) * | 2008-08-26 | 2010-03-11 | Shimadzu Corp | Testing machine |
| CN102168540A (en) * | 2011-04-01 | 2011-08-31 | 孙茂意 | Hydraulic pumping unit with pressure compensation device |
| CN102367788A (en) * | 2011-12-06 | 2012-03-07 | 吉林大学 | Staggered phase parallel combined plunger-type hydraulic pump |
| JP2012194092A (en) * | 2011-03-17 | 2012-10-11 | Shimadzu Corp | Material testing machine |
-
2012
- 2012-12-14 CN CN201210544369XA patent/CN103032393A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0451274A1 (en) * | 1988-12-27 | 1991-10-16 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic controller |
| CN2201997Y (en) * | 1993-09-17 | 1995-06-28 | 中国石化上海金山实业公司 | Oil hydraulic apparatus for hydraulic elastic pipe expander |
| JP2010054204A (en) * | 2008-08-26 | 2010-03-11 | Shimadzu Corp | Testing machine |
| JP2012194092A (en) * | 2011-03-17 | 2012-10-11 | Shimadzu Corp | Material testing machine |
| CN102168540A (en) * | 2011-04-01 | 2011-08-31 | 孙茂意 | Hydraulic pumping unit with pressure compensation device |
| CN102367788A (en) * | 2011-12-06 | 2012-03-07 | 吉林大学 | Staggered phase parallel combined plunger-type hydraulic pump |
Non-Patent Citations (1)
| Title |
|---|
| 杨可森，等: "PWS-1000型电液伺服动静态材料与结构试验机的液压系统设计", 《液压与气动》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156376A (en) * | 2015-08-20 | 2015-12-16 | 深圳市达丰科技有限公司 | Closed hydraulic servo loading system, hydraulic device and loading device |
| CN115875447A (en) * | 2023-01-09 | 2023-03-31 | 索特传动设备有限公司 | Hydraulic control system, gear shifting mechanism and engineering machinery |
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Application publication date: 20130410 |