CN107882786A - The quiet dynamic flow real-time matching system of closed model pump control asymmetric servo cylinder - Google Patents
The quiet dynamic flow real-time matching system of closed model pump control asymmetric servo cylinder Download PDFInfo
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- CN107882786A CN107882786A CN201710982037.2A CN201710982037A CN107882786A CN 107882786 A CN107882786 A CN 107882786A CN 201710982037 A CN201710982037 A CN 201710982037A CN 107882786 A CN107882786 A CN 107882786A
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- Prior art keywords
- asymmetric
- servo cylinder
- gear pump
- oil
- asymmetric servo
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
Abstract
The quiet dynamic flow real-time matching system of closed model pump control asymmetric servo cylinder, belong to electrohydraulic control system, servomotor is coaxially connected with becoming discharge capacity gear pump with asymmetric teeth, the rodless cavity of the first actuator port and asymmetric servo cylinder that become discharge capacity gear pump with asymmetric teeth connects, the rod chamber of the second actuator port and asymmetric servo cylinder that become discharge capacity gear pump with asymmetric teeth is connected, and the 3rd actuator port for becoming discharge capacity gear pump with asymmetric teeth is connected with accumulator；Accumulator connects with the oil inlet of first, second check valve, the oil-out of first and second overload valve, the oil-out of first check valve connects with the rodless cavity of asymmetric servo cylinder, the oil-out of second check valve connects with asymmetric servo cylinder rod chamber, the oil inlet of first overload valve connects with asymmetric servo cylinder rodless cavity, and the oil inlet of the second overload valve connects with asymmetric servo cylinder rod chamber.The present invention can compensate for asymmetric flow caused by cylinder with differential effect difference in areas, realize that the flow dynamics between asymmetric servo cylinder and gear pump with asymmetric teeth match.
Description
Technical field
The present invention relates to a kind of control loop of closed model pump control asymmetric servo cylinder, belong to electrohydraulic control system.
Background technology
Electrohydraulic control technology has valve control and the major class of pump control two.Valve control application is extensive at present, but larger restriction loss be present,
Energy efficiency is low, causes system heat generation, if additional cooling device, further increases system installed power and cost, and generate heat also
Failure may be caused.Valve control system is all open circuit, and fluid usage amount is big, and pollution can be also produced when handling waste oil.
Technology is directly controlled using the pump of valveless, balance need to be resolved as valve control principle to the chamber pre-pressing of hydraulic cylinder two
The problem of cylinder with differential effect asymmetry flow.
The content of the invention
In view of the shortcomings of the prior art, the present invention is intended to provide one kind is simple in construction, sets convenient asymmetric servo cylinder non-
The dynamic realtime matching system of symmetrical flow.
Therefore, the present invention provides a kind of quiet dynamic flow real-time matching loop of closed model pump control asymmetric servo cylinder, for reality
The dynamic realtime matching of the asymmetric flow of existing asymmetric servo cylinder.
The present invention is realized using following technical scheme.
A kind of quiet dynamic flow real-time matching loop of closed model pump control asymmetric servo cylinder, including servomotor, accumulator, overflow
Flow valve, check valve, single-rod cylinder；Servomotor and gear pump with variable capacity and quantitative gear pump are coaxially connected, gear pump with asymmetric teeth
The first hydraulic fluid port A and the rodless cavity of asymmetric servo cylinder connect, the rod chamber of the second hydraulic fluid port B and asymmetric servo cylinder connects, the
Three hydraulic fluid port C are connected with accumulator；Accumulator is connected by check valve with the rodless cavity and rod chamber of hydraulic cylinder；Two overflow valves
Oil inlet connects with hydraulic cylinder rodless cavity and rod chamber respectively, the connection of oil-out accumulator.
Become discharge capacity gear pump with asymmetric teeth it is characterized in that having additional, described gear pump with asymmetric teeth by a quantitative gear pump and
One gear pump with variable capacity composition, by the change of variable gear discharge capacity, can match asymmetric servo cylinder rod chamber and rodless cavity
Arbitrary cross section accumulates ratio.Described gear pump with asymmetric teeth has three oil-distribution ports, respectively the first hydraulic fluid port, the second hydraulic fluid port and
Three hydraulic fluid ports.
The specific control method of the present invention is as follows：
Controller gather asymmetric servo cylinder position signalling, after processing output regulation signal come control servomotor rotating speed and
The discharge capacity of pump；When servomotor turns clockwise, gear pump with asymmetric teeth is by the first hydraulic fluid port oil extraction, the second hydraulic fluid port oil suction, and
Three hydraulic fluid ports are stretched out from accumulator oil suction with the difference in flow of the chamber of compensating hydraulic cylinder two, control hydraulic cylinder piston rod；When servomotor is inverse
When hour hands rotate, gear pump with asymmetric teeth is discharged into storage by the first hydraulic fluid port oil suction, the second hydraulic fluid port oil extraction, unnecessary fluid through the 3rd hydraulic fluid port
Energy device, hydraulic cylinder piston rod are withdrawn.
Compared with prior art, advantages of the present invention and good effect are as follows.
The present invention can compensate for asymmetric flow caused by cylinder with differential effect difference in areas, realize asymmetric servo cylinder with it is asymmetric
Flow dynamics matching between gear pump, is symmetrically stretched out and withdraws speed, simple control structure, obtains system good
Dynamic characteristic.
The Area comparison of asymmetric servo cylinder is fixes at present, and quantitative gear pump combines with gear pump with variable capacity, and use is this
Structure type, it can make asymmetric pump that there is certain versatility.One asymmetric pump can realize the function of two self-contained pumps, more expand
Its use range is opened up.Both quiescent flow is can control, also can control the regulation of dynamic flow pulsation, reduces leakage loss.
Because gear pump with asymmetric teeth has four-quadrant operation characteristic, under different loads effect, gear pump with asymmetric teeth can go out
Existing pump condition, motor operating conditions, pump-motor complex conditions, more frequently internal energy conversion be present, by solving system energy
Pipeline and action rule are measured, system action potential automatic conversion is realized and efficiently utilizes.
Brief description of the drawings
Fig. 1 is the system architecture schematic diagram of the asymmetric pump control single-rod cylinder of the present invention.
Fig. 2 is the three-dimensional explosive view of gear pump with asymmetric teeth.
Fig. 3 is the diagrammatic cross-section of three oil-distribution ports of gear pump with asymmetric teeth.
In figure, 1. servomotors, 2. accumulators, 3. gear pump with asymmetric teeth, 4. overflow valves, 5. check valves, 6. single pole hydraulic pressure
Cylinder, 7. controllers, 8. drive end bearing brackets, 9. axle bushes, 10. gears, 11. drive shafts, 12. driven shafts, 13. housings, 14. rear end caps. A：
First hydraulic fluid port of gear pump with asymmetric teeth；B：Second hydraulic fluid port of gear pump with asymmetric teeth；C：3rd hydraulic fluid port of gear pump with asymmetric teeth.
Embodiment
The embodiment of the present invention is further illustrated below.
As shown in Figure 1, a kind of real-time of quiet dynamic flow of closed model pump control asymmetric servo cylinder provided by the invention is implemented
With loop, including servomotor 1, accumulator 2, gear pump with asymmetric teeth 3, overflow valve 4, check valve 5, single-rod cylinder 6, controller
7。
Controller gather asymmetric servo cylinder position signalling, after processing output regulation signal come control servomotor turn
The discharge capacity of speed and pump；Servomotor and gear pump with variable capacity and quantitative gear pump are coaxially connected, the first hydraulic fluid port of gear pump with asymmetric teeth
It is connected with the rodless cavity of asymmetric servo cylinder, the rod chamber connection of the second hydraulic fluid port and asymmetric servo cylinder, the 3rd hydraulic fluid port and accumulation of energy
Device connects；Accumulator is connected by check valve with the rodless cavity and rod chamber of hydraulic cylinder；The oil inlet of two overflow valves respectively with
Hydraulic cylinder rodless cavity connects with rod chamber, the connection of oil-out accumulator.
As shown in Figure 2, gear pump with asymmetric teeth includes drive end bearing bracket 8, gear 10, axle bush 9, drive shaft 11, driven shaft 12, shell
Body 13, rear end cap 14；Drive shaft, driven shaft one end are provided with axle bush, gear, axle bush and drive end bearing bracket, and drive shaft, driven shaft are another
End is provided with axle bush, gear, axle bush and rear end cap.
As shown in Figure 3, gear pump with asymmetric teeth is made up of a quantitative gear pump and a gear pump with variable capacity, passes through variable
The change of gear discharge capacity, asymmetric servo cylinder rod chamber and rodless cavity arbitrary cross section product ratio can be matched.Described is asymmetric
Gear pump has three oil-distribution ports, is the first hydraulic fluid port A, the second hydraulic fluid port B and the 3rd hydraulic fluid port C respectively.
Motor is servomotor used by driving gear pump with asymmetric teeth drive shaft in the present invention.
A kind of quiet dynamic flow real-time matching loop of closed model pump control asymmetric servo cylinder of the above-mentioned specific implementation of the present invention, its
Control method is as follows：Controller gathers the position signalling of asymmetric servo cylinder, and output regulation signal controls servo after processing
The discharge capacity of motor speed and pump；When servomotor turns clockwise, gear pump with asymmetric teeth passes through the first hydraulic fluid port oil extraction, the second oil
Mouth oil suction, the 3rd hydraulic fluid port are stretched out from accumulator oil suction with the difference in flow of the chamber of compensating hydraulic cylinder two, control hydraulic cylinder piston rod；When watching
When taking motor rotate counterclockwise, gear pump with asymmetric teeth is by the first hydraulic fluid port oil suction, and the second hydraulic fluid port oil extraction, unnecessary fluid is through the 3rd oil
Mouth is discharged into accumulator, and hydraulic cylinder piston rod is withdrawn.
Servomotor 1 and become discharge capacity gear pump with asymmetric teeth 3 it is coaxially connected, the first actuator port A of gear pump with asymmetric teeth 3 with
The rodless cavity connection of asymmetric servo cylinder 6, the second actuator port B are connected with the rod chamber of asymmetric servo cylinder 6, the 3rd working oil
Mouth C is connected with accumulator 2；Accumulator is connected with the oil inlet of check valve 5, the oil-out of overflow valve 4 by fluid pressure line.Unidirectionally
The oil-out of valve 5 connects with the rodless cavity and rod chamber of asymmetric servo cylinder 6 respectively；The oil inlet of overflow valve 4 and single rod liquid
The rodless cavity of cylinder pressure 6 connects with rod chamber.
The operation principle of above-mentioned embodiment is as follows.
Position signalling etc. of controller collection asymmetric servo cylinder 6, output regulation signal controls servo electric after processing
The rotating speed of machine 1 and the discharge capacity of gear pump with asymmetric teeth 3；When AC servo motor 1 turns clockwise, gear pump with asymmetric teeth 3 passes through
First hydraulic fluid port A oil extractions, the second hydraulic fluid port B oil suctions, the 3rd hydraulic fluid port C is from the oil suction of accumulator 2 to compensate the stream of 6 liang of chambers of asymmetric servo cylinder
Amount is poor, and control hydraulic cylinder 6 piston rod stretches out；When 1 rotate counterclockwise of AC servo motor, gear pump with asymmetric teeth 6 passes through first
Hydraulic fluid port A oil suctions, the second hydraulic fluid port B oil extractions, unnecessary fluid are discharged into accumulator 2 through the 3rd hydraulic fluid port C, and the piston rod of asymmetric servo cylinder 6 is received
Return.
Claims (4)
1. the quiet dynamic flow real-time matching system of closed model pump control asymmetric servo cylinder, including servomotor, accumulator, the first overload
Valve, the second overload valve, the first check valve, the second check valve, asymmetric servo cylinder, it is characterized in that servomotor is non-right with becoming discharge capacity
Claim gear pump coaxially connected, the rodless cavity of the first actuator port and asymmetric servo cylinder that become discharge capacity gear pump with asymmetric teeth connects,
The rod chamber of the second actuator port and asymmetric servo cylinder that become discharge capacity gear pump with asymmetric teeth connects, and becomes discharge capacity gear pump with asymmetric teeth
The 3rd actuator port be connected with accumulator；Accumulator and the first check valve, the oil inlet of the second check valve, the first overload valve,
The oil-out connection of second overload valve, the oil-out of the first check valve connect with the rodless cavity of asymmetric servo cylinder, and second is unidirectional
The oil-out of valve connects with asymmetric servo cylinder rod chamber, and oil inlet and the asymmetric servo cylinder rodless cavity of the first overload valve connect
Logical, the oil inlet of the second overload valve connects with asymmetric servo cylinder rod chamber.
2. the quiet dynamic flow real-time matching system of closed model pump control asymmetric servo cylinder according to claim 1, it is characterized in that institute
The change discharge capacity gear pump with asymmetric teeth stated is made up of a quantitative gear pump and a gear pump with variable capacity, passes through variable gear discharge capacity
Change, match asymmetric servo cylinder rod chamber and rodless cavity arbitrary cross section product ratio；Described gear pump with asymmetric teeth has three
Oil-distribution port, respectively the first actuator port, the second actuator port and the 3rd actuator port.
3. the quiet dynamic flow real-time matching system of closed model pump control asymmetric servo cylinder according to claim 1, its feature exist
In：Gear pump with asymmetric teeth includes drive end bearing bracket, gear, axle bush, drive shaft, driven shaft, housing, gear, rear end cap；Drive shaft, from
Moving axis one end is sequentially installed with axle bush, gear, axle bush and drive end bearing bracket, and drive shaft, the driven shaft other end are sequentially installed with axle bush, tooth
Wheel, axle bush and rear end cap.
4. the quiet dynamic flow real-time matching system of closed model pump control asymmetric servo cylinder according to claim 1, its feature exist
In：Controller gather asymmetric servo cylinder position signalling, after processing output regulation signal come control servomotor rotating speed and
The discharge capacity of pump；When servomotor turns clockwise, gear pump with asymmetric teeth is by the first hydraulic fluid port oil extraction, the second hydraulic fluid port oil suction, and
Three hydraulic fluid ports are stretched out from accumulator oil suction with the difference in flow of the chamber of compensating hydraulic cylinder two, control hydraulic cylinder piston rod；When servomotor is inverse
When hour hands rotate, gear pump with asymmetric teeth is discharged into storage by the first hydraulic fluid port oil suction, the second hydraulic fluid port oil extraction, unnecessary fluid through the 3rd hydraulic fluid port
Energy device, hydraulic cylinder piston rod are withdrawn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710982037.2A CN107882786B (en) | 2017-10-20 | 2017-10-20 | Static and dynamic flow real-time matching system of closed pump control single-rod hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710982037.2A CN107882786B (en) | 2017-10-20 | 2017-10-20 | Static and dynamic flow real-time matching system of closed pump control single-rod hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN107882786A true CN107882786A (en) | 2018-04-06 |
| CN107882786B CN107882786B (en) | 2020-01-07 |
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| CN201710982037.2A Active CN107882786B (en) | 2017-10-20 | 2017-10-20 | Static and dynamic flow real-time matching system of closed pump control single-rod hydraulic cylinder |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109114076A (en) * | 2018-10-17 | 2019-01-01 | 太原理工大学 | A kind of single rod cylinder system of pump control |
| CN111050869A (en) * | 2018-06-01 | 2020-04-21 | 哈威阿尔滕斯塔特控股有限公司 | Amusement ride passenger carrying unit |
| CN111237292A (en) * | 2020-01-12 | 2020-06-05 | 福建工程学院 | Speed closed-loop control method of variable-rotation-speed single-pump cylinder control closed system under four-quadrant working condition |
| CN111852982A (en) * | 2020-07-13 | 2020-10-30 | 南京理工大学 | Integrated radiating pump-controlled hydraulic cylinder |
| CN112727821A (en) * | 2021-01-05 | 2021-04-30 | 中冶南方连铸技术工程有限责任公司 | Single-rod electro-hydraulic direct-drive servo cylinder device |
| CN113251013A (en) * | 2021-06-07 | 2021-08-13 | 中冶赛迪技术研究中心有限公司 | Electro-hydraulic direct-drive servo closed differential control driving system of stepping lifting mechanism |
| CN116851696A (en) * | 2023-05-30 | 2023-10-10 | 济南二机床集团有限公司 | Injection system based on die casting machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2408267Y (en) * | 2000-03-06 | 2000-11-29 | 胡惊雷 | Variable hydraulic gear pump |
| CN1818382A (en) * | 2006-03-07 | 2006-08-16 | 太原理工大学 | Closed electrohydraulic controlling system |
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2017
- 2017-10-20 CN CN201710982037.2A patent/CN107882786B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2408267Y (en) * | 2000-03-06 | 2000-11-29 | 胡惊雷 | Variable hydraulic gear pump |
| CN1818382A (en) * | 2006-03-07 | 2006-08-16 | 太原理工大学 | Closed electrohydraulic controlling system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111050869A (en) * | 2018-06-01 | 2020-04-21 | 哈威阿尔滕斯塔特控股有限公司 | Amusement ride passenger carrying unit |
| CN111050869B (en) * | 2018-06-01 | 2021-09-14 | 哈威阿尔滕斯塔特控股有限公司 | Amusement ride passenger carrying unit |
| CN109114076A (en) * | 2018-10-17 | 2019-01-01 | 太原理工大学 | A kind of single rod cylinder system of pump control |
| CN111237292A (en) * | 2020-01-12 | 2020-06-05 | 福建工程学院 | Speed closed-loop control method of variable-rotation-speed single-pump cylinder control closed system under four-quadrant working condition |
| CN111852982A (en) * | 2020-07-13 | 2020-10-30 | 南京理工大学 | Integrated radiating pump-controlled hydraulic cylinder |
| CN112727821A (en) * | 2021-01-05 | 2021-04-30 | 中冶南方连铸技术工程有限责任公司 | Single-rod electro-hydraulic direct-drive servo cylinder device |
| CN112727821B (en) * | 2021-01-05 | 2023-10-27 | 中冶南方连铸技术工程有限责任公司 | Single-rod electrohydraulic direct-drive servo cylinder device |
| CN113251013A (en) * | 2021-06-07 | 2021-08-13 | 中冶赛迪技术研究中心有限公司 | Electro-hydraulic direct-drive servo closed differential control driving system of stepping lifting mechanism |
| CN113251013B (en) * | 2021-06-07 | 2022-08-12 | 中冶赛迪技术研究中心有限公司 | Electro-hydraulic direct-drive servo closed differential control driving system of stepping lifting mechanism |
| CN116851696A (en) * | 2023-05-30 | 2023-10-10 | 济南二机床集团有限公司 | Injection system based on die casting machine |
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| CN107882786B (en) | 2020-01-07 |
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