CN100458184C - Polyphase multi-rhythm stepped plunger piston hydraulic motor - Google Patents
Polyphase multi-rhythm stepped plunger piston hydraulic motor Download PDFInfo
- Publication number
- CN100458184C CN100458184C CNB2007100679366A CN200710067936A CN100458184C CN 100458184 C CN100458184 C CN 100458184C CN B2007100679366 A CNB2007100679366 A CN B2007100679366A CN 200710067936 A CN200710067936 A CN 200710067936A CN 100458184 C CN100458184 C CN 100458184C
- Authority
- CN
- China
- Prior art keywords
- speed
- valve
- plunger
- oil
- sensitive switch
- 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
Images
Landscapes
- Hydraulic Motors (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention relates to a fluid power motor with polyphase and polystep plunger. It makeup with shell,sloping cam plate,oil distributing unit with switching change-torque value,electromechanical convertor,turn angle detection sensor and electronic controller. Switching change-torque value makeup with plunger piston and nil distributing value group which contains front end plate,valve plate, lower end plate,high speed-optical switching heavy pressure oil valve and high speed-optical switching oil vent/slippage valve. Entry end of high speed-optical switching heavy pressure oil valve connects to pressure oil port and export end connects to cavity of plunger piston. Spring end of high speed-optical switching oil vent/slippage valve connects to cavity of plunger piston. The motor take real-time adjusting on duty cycle and control the switching change-torque. The invention save large quantity of energy and improve driving pressure of fluid power motor by without relative slip between oil distributing unit and end surfave of cylinder body.
Description
Technical field
The present invention relates to oil hydraulic motor, in particular, relate to a kind of polyphase multi-rhythm stepped plunger piston hydraulic motor.
Background technique
Thereby plunger piston hydraulic motor is to rely on pressure oil to act on to make motor output shaft obtain certain torque on the plunger, for plunger can alternately be communicated with pressure hydraulic fluid port and return opening, must adopt flow distribution apparatus, plunger piston hydraulic motor adopts valve plate distribution more at present, and the main devices that is adopted in the valve plate distribution is exactly an oil distribution casing.The similar plate valve of oil distribution casing, be fitted in the cylinder body end face that has assignment hole by plane with two arcs (" waist shape ") window, make cylinder body and oil distribution casing relative rotation on face perpendicular to motor drive shaft, the relative position of window on the oil distribution casing and the perforate of cylinder body end face is arranged according to certain rules, so that be in plunger case in fuel feeding or the oil extraction stroke can replace with the motor body on confession, oil extraction communicates, and guarantees isolation and sealing between each oil pocket.Because relative rotation between oil distribution casing and the cylinder body, therefore wearing and tearing form the end clearance mutually, the leakage of oil hydraulic motor is just mainly revealed from the end face between oil distribution casing and the cylinder body, and the end face of oil hydraulic motor is revealed the major obstacle that becomes present restriction oil hydraulic motor working pressure.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of polyphase multi-rhythm stepped plunger piston hydraulic motor is provided.
In order to overcome the above problems, the present invention is achieved through the following technical solutions.
A kind of polyphase multi-rhythm stepped plunger piston hydraulic motor comprises motor casing and swash plate, also comprises switch changeable torque valve-controlled oil distributing components, electromechanical converter, rotation angle detecting sensor and electronic controller; Described switch changeable torque valve-controlled oil distributing components comprises plunger and oil distributing valve group, and described oil distributing valve group is made up of front shroud, valve plate, back shroud, speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve; Described speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve all are contained on the valve plate; Described speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve are formed by push rod, spool, spring and spring chamber, and an end of described spool links to each other with push rod, and valve core upper sleeve has spring, and an end of push rod is equiped with high-speed switch electromagnet;
The entry end of described speed-sensitive switch high-pressure oil feed valve links to each other with the pressure hydraulic fluid port, and outlet end links to each other with the plunger cavity of plunger; Spring chamber one end of described speed-sensitive switch oil extraction-Fill valve links to each other with the plunger cavity of plunger, and the other end links to each other with return opening; The a pair of speed-sensitive switch high-pressure oil feed valve that is connected with each plunger cavity and the keying opposite states of speed-sensitive switch oil extraction-Fill valve;
Described rotation angle detecting sensor is installed on the projecting shaft of polyphase multi-rhythm stepped plunger piston hydraulic motor, and the angular signal that obtains is passed to electronic controller;
Described electromechanical converter is used for driving each speed-sensitive switch high-pressure oil feed valve and the speed-sensitive switch oil extraction-Fill valve in the oil distributing valve group;
Described electronic controller is according to the polyphase multi-rhythm stepped plunger piston hydraulic motor projecting shaft angular signal that obtains, control the switch of each speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve, fit like a glove to the phase angle of each valve control signal and the angle of swing of polyphase multi-rhythm stepped plunger piston hydraulic motor projecting shaft guaranteeing.
As a kind of improvement, an end of described push rod passes back shroud, and the relevant position of the back shroud that passes at push rod is equiped with high-speed switch electromagnet, is used to control the motion of push rod.
A kind of change torque control method that is applicable to polyphase multi-rhythm stepped plunger piston hydraulic motor may further comprise the steps:
(1) rotation angle detecting sensor detects the hydraulic motor output shaft angle of swing, electronic controller is according to this angle of swing, by electromechanical converter the speed-sensitive switch high-pressure oil feed valve in the oil distributing valve group and speed-sensitive switch oil extraction-Fill valve are carried out switch control, make the phase angle of control signal and the angle of swing of polyphase multi-rhythm stepped plunger piston hydraulic motor projecting shaft fit like a glove, guarantee that each plunger of oil hydraulic motor can both be discharged to return opening to hydraulic oil by speed-sensitive switch oil extraction-Fill valve in the backhaul process, in the process process, can both pass through speed-sensitive switch high-pressure oil feed valve or speed-sensitive switch oil extraction-Fill valve from pressure hydraulic fluid port or return opening oil suction;
(2) opening time of control speed-sensitive switch high-pressure oil feed valve, make corresponding plunger, have only part-time pressure oil can enter the plunger cavity of oil hydraulic motor, promote the plunger acting by speed-sensitive switch high-pressure oil feed valve in the oil suction stage;
All the other time plunger cavities in oil suction stage are the speed-sensitive switch oil extraction-Fill valve by communicating with return opening all, directly from the return opening oil suction, replenish the cavity that plunger motion produces, but can not promote the plunger acting, guarantee that the average output torque of oil hydraulic motor is directly proportional with the dutycycle of displacement in whole plunger oil suction stroke of speed-sensitive switch high-pressure oil feed valve opening time section inner plunger;
(3) by the real-time regulated to displacement dutycycle in whole plunger oil suction stroke of speed-sensitive switch high-pressure oil feed valve opening time section inner plunger, the average torque that output is directly proportional with dutycycle has realized that the change moment of torsion of polyphase multi-rhythm stepped plunger piston hydraulic motor is controlled; Pass between dutycycle and the average torque is:
Dutycycle=X
Open* 2n=T/ (D * P * η
Machine* η
Valve),
Wherein: X
OpenBe the plunger displacement in the speed-sensitive switch high-pressure oil feed valve opening time section, n is the rotating speed of polyphase multi-rhythm stepped plunger piston hydraulic motor output shaft, the average torque of T for needing to obtain, and D is the discharge capacity of polyphase multi-rhythm stepped plunger piston hydraulic motor, P is the pressure of pressure hydraulic fluid port, η
MachineBe the mechanical efficiency of polyphase multi-rhythm stepped plunger piston hydraulic motor, η
ValveEfficient for oil distributing valve group control plunger cavity.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the present invention passes through the real-time regulated to displacement dutycycle in whole plunger oil suction stroke of speed-sensitive switch high-pressure oil feed valve opening time section inner plunger, and the average torque that output is directly proportional with dutycycle has realized that switch becomes moment of torsion control.
(2) when load torque is less, though its part plunger is in the oil suction district, but still from the return opening oil suction, and do not need pressure oil is wasted on the extra throttling control valve mouth, thereby saved a large amount of energy consumptions.
(3) valve-controlled oil distributing components of the present invention is directly installed on the polyphase multi-rhythm stepped plunger piston hydraulic motor plunger cylinder end face, replaced traditional oil distribution casing, owing to do not had slide relative between valve-controlled oil distributing components and the polyphase multi-rhythm stepped plunger piston hydraulic motor plunger cylinder end face, therefore improved the driving pressure of polyphase multi-rhythm stepped plunger piston hydraulic motor greatly.
Description of drawings
Fig. 1 is a schematic representation of the present invention.
Fig. 2 is plunger position of the present invention and action flow chart.
Fig. 3 is a specific embodiment of the invention structural representation.
Fig. 4 is a specific embodiment of the invention valve enlarged view.
Among the figure, 1 electromechanical converter, 2 speed-sensitive switch high-pressure oil feed valves, 3 speed-sensitive switch oil extraction-Fill valves, 4 oil hydraulic motor plunger cylinders, 5 plunger cavities, 6 plungers, 7 electronic controllers, 8 rotation angle detecting sensors, 9 projecting shafts, 10 pressure hydraulic fluid ports, 11 return openings, 12 drain taps, 13 motor casings, 14 front shrouds, 15 valve plates, 16 back shrouds, 17 spring chambers, 18 hydrostatic supports, 19 bearings, 21 envelopes, 22 bodies, 23 spherical plunger supportings, 24 plunger pressure rings, 25 housings.
Embodiment
In conjunction with the accompanying drawings, the present invention is described in detail below.
A kind of polyphase multi-rhythm stepped plunger piston hydraulic motor comprises motor casing and swash plate, also comprises switch changeable torque valve-controlled oil distributing components, electromechanical converter, rotation angle detecting sensor and electronic controller; The switch changeable torque valve-controlled oil distributing components comprises plunger and oil distributing valve group, and the oil distributing valve group is made up of front shroud, valve plate, back shroud, speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve; Speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve all are contained on the valve plate; Speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve are formed by push rod, spool, spring and spring chamber, and an end of spool links to each other with push rod, and valve core upper sleeve has spring, and an end of push rod is equiped with high-speed switch electromagnet, is used to control the motion of push rod.
The entry end of speed-sensitive switch high-pressure oil feed valve links to each other with the pressure hydraulic fluid port, and outlet end links to each other with the plunger cavity of plunger; Spring chamber one end of speed-sensitive switch oil extraction-Fill valve links to each other with the plunger cavity of plunger, and the other end links to each other with return opening; The a pair of speed-sensitive switch high-pressure oil feed valve that is connected with each plunger cavity and the keying opposite states of speed-sensitive switch oil extraction-Fill valve; Rotation angle detecting sensor is installed on the projecting shaft of polyphase multi-rhythm stepped plunger piston hydraulic motor, and the angular signal that obtains is passed to electronic controller; Electromechanical converter is used for driving each speed-sensitive switch high-pressure oil feed valve and the speed-sensitive switch oil extraction-Fill valve in the oil distributing valve group; Electronic controller is according to the polyphase multi-rhythm stepped plunger piston hydraulic motor projecting shaft angular signal that obtains, control the switch of each speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve, fit like a glove to the phase angle of each valve control signal and the angle of swing of polyphase multi-rhythm stepped plunger piston hydraulic motor projecting shaft guaranteeing.
Each plunger in the polyphase multi-rhythm stepped plunger piston hydraulic motor in the present embodiment is controlled separately by corresponding with it each speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve in the oil distributing valve group.On this basis, special electromechanical converter, rotation angle detecting sensor and electronic controller have been disposed.
Electromechanical converter is used for driving each speed-sensitive switch high-pressure oil feed valve and the speed-sensitive switch oil extraction-Fill valve in the oil distributing valve group, and each valve is joined one.Give each valve with same waveform as, amplitude, but the control signal of phase phase difference (360 °/plunger number), to substitute the rotating function of the relative hydraulic motor cylinders of oil distribution casing.
Rotation angle detecting sensor is installed on the projecting shaft of oil hydraulic motor, and the angular signal that obtains is passed to electronic controller.
Electronic controller is controlled the switch of each valve according to the oil hydraulic motor projecting shaft angular signal that obtains, and fits like a glove to the phase angle of each valve control signal and the angle of swing of hydraulic motor output shaft guaranteeing.Simultaneously according to requirement to the output loading size, carry out real-time regulated by displacement dutycycle in whole plunger oil suction stroke to speed-sensitive switch high-pressure oil feed valve opening time section inner plunger, make oil suction stage at corresponding plunger, have only portion of time pressure oil can enter the plunger cavity of oil hydraulic motor by speed-sensitive switch high-pressure oil feed valve, the acting of promotion plunger, all the other time plunger cavities in oil suction stage are the speed-sensitive switch oil extraction-Fill valve by communicating with return opening all, directly from the return opening oil suction, replenish the cavity that plunger motion produces, but can not promote the plunger acting, thereby make oil hydraulic motor average output torque not only with the discharge capacity of this oil hydraulic motor, the inlet oil pressure is directly proportional, also be directly proportional with the dutycycle of displacement in whole plunger oil suction stroke of speed-sensitive switch high-pressure oil feed valve opening time section inner plunger, thereby the average torque that output is directly proportional with dutycycle has realized that switch becomes moment of torsion control.
Pass between dutycycle and the average torque is:
Dutycycle=X
Open* 2n=T/ (D * P * η
Machine* η
Valve),
Wherein: X
OpenBe the plunger displacement in the speed-sensitive switch high-pressure oil feed valve opening time section, n is the rotating speed of polyphase multi-rhythm stepped plunger piston hydraulic motor output shaft, the average torque of T for needing to obtain, and D is the discharge capacity of polyphase multi-rhythm stepped plunger piston hydraulic motor, P is the pressure of pressure hydraulic fluid port, η
MachineBe the mechanical efficiency of polyphase multi-rhythm stepped plunger piston hydraulic motor, η
ValveEfficient for oil distributing valve group control plunger cavity.
(plunger backhaul when plunger is in the oil extraction district, the plunger cavity volume reduces), speed-sensitive switch high-pressure oil feed valve cuts out under the effect of spring force and hydraulic coupling, and speed-sensitive switch oil extraction-Fill valve is opened under the effect of electromagnet, makes the oil of plunger cavity flow back to return opening by the passage between front shroud and the valve plate; When plunger is in the oil suction district (plunger process, the plunger cavity volume increases), speed-sensitive switch high-pressure oil feed valve is opened under the effect of electromagnet, and pressure oil enters plunger cavity from the pressure hydraulic fluid port, but the time of opening is controlled; In the time of outside plunger is in the oil suction district, speed-sensitive switch high-pressure oil feed valve is not opened, and has caused the instantaneous suction sky of plunger cavity thus, under the effect of return opening pressure, speed-sensitive switch oil extraction-Fill valve is opened, and to the plunger cavity fuel feeding, guarantees the smooth oil suction of plunger cavity.For guaranteeing the motor proper functioning, return opening still will have certain pressure.
In conjunction with the accompanying drawings 2, when plunger was in state 1, speed-sensitive switch high-pressure oil feed valve cut out under spring force and action of hydraulic force, and speed-sensitive switch oil extraction-Fill valve is opened by force, and plunger is to the smooth oil extraction of return opening; When plunger was in state 2, speed-sensitive switch oil extraction-Fill valve was closed by force, and plunger cavity pressure rises; When plunger was in state 3, speed-sensitive switch high-pressure oil feed valve was opened by force, and speed-sensitive switch oil extraction-Fill valve still is in closed condition, the plunger cavity oil suction of boosting; When plunger was in state 4, speed-sensitive switch high-pressure oil feed valve cut out, and speed-sensitive switch oil extraction-Fill valve still is in closed condition, and pressure promotes plunger and continues motion; When plunger was in state 5, plunger cavity pressure reduced, and speed-sensitive switch oil extraction-Fill valve is opened under the effect of return opening pressure, and plunger is from the return opening oil suction; When plunger was in state 6, speed-sensitive switch oil extraction-Fill valve was opened by force, guaranteed that plunger is from the smooth oil suction of return opening.
Substituted oil distribution casing oil hydraulic motor afterwards by valve-controlled oil distributing components of the present invention, when load torque is less, though its part plunger is in the oil suction district, but still from the return opening oil suction, and do not need pressure oil is wasted on the extra throttling control valve mouth, thereby saved a large amount of energy consumptions.
Meanwhile, because the face leakage of slide relative face is the biggest obstacle that fluid motor-driven pressure further raises between oil distribution casing and the plunger cylinder always, valve-controlled oil distributing components of the present invention is directly installed on the oil hydraulic motor plunger cylinder end face, replace oil distribution casing, do not had slide relative between valve-controlled oil distributing components and the oil hydraulic motor plunger cylinder end face, cleared away the major technique obstacle yet for the plunger piston hydraulic motor driving pressure significantly improves.
At last, it should be noted that the above specific embodiments of the invention of enumerating.Obviously, the invention is not restricted to above embodiment, can also be by a lot of distortion.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate all should be thought protection scope of the present invention.
Claims (3)
1, a kind of polyphase multi-rhythm stepped plunger piston hydraulic motor comprises motor casing and swash plate, it is characterized in that, also comprises switch changeable torque valve-controlled oil distributing components, electromechanical converter, rotation angle detecting sensor and electronic controller; Described switch changeable torque valve-controlled oil distributing components comprises plunger and oil distributing valve group, and described oil distributing valve group is made up of front shroud, valve plate, back shroud, speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve; Described speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve all are contained on the valve plate; Described speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve are formed by push rod, spool, spring and spring chamber, and an end of described spool links to each other with push rod, and valve core upper sleeve has spring, and an end of push rod is equiped with high-speed switch electromagnet;
The entry end of described speed-sensitive switch high-pressure oil feed valve links to each other with the pressure hydraulic fluid port, and outlet end links to each other with the plunger cavity of plunger; Spring chamber one end of described speed-sensitive switch oil extraction-Fill valve links to each other with the plunger cavity of plunger, and the other end links to each other with return opening; The a pair of speed-sensitive switch high-pressure oil feed valve that is connected with each plunger cavity and the keying opposite states of speed-sensitive switch oil extraction-Fill valve;
Described rotation angle detecting sensor is installed on the projecting shaft of polyphase multi-rhythm stepped plunger piston hydraulic motor, and the angular signal that obtains is passed to electronic controller;
Described electromechanical converter is used for driving each speed-sensitive switch high-pressure oil feed valve and the speed-sensitive switch oil extraction-Fill valve in the oil distributing valve group;
Described electronic controller is according to the polyphase multi-rhythm stepped plunger piston hydraulic motor projecting shaft angular signal that obtains, control the switch of each speed-sensitive switch high-pressure oil feed valve and speed-sensitive switch oil extraction-Fill valve, fit like a glove to the phase angle of each valve control signal and the angle of swing of polyphase multi-rhythm stepped plunger piston hydraulic motor projecting shaft guaranteeing.
2, polyphase multi-rhythm stepped plunger piston hydraulic motor according to claim 1 is characterized in that, an end of described push rod passes back shroud, and the relevant position of the back shroud that passes at push rod is equiped with high-speed switch electromagnet, is used to control the motion of push rod.
3, a kind of change torque control method that is applicable to polyphase multi-rhythm stepped plunger piston hydraulic motor is characterized in that, may further comprise the steps:
(1) rotation angle detecting sensor detects the hydraulic motor output shaft angle of swing, electronic controller is according to this angle of swing, by electromechanical converter the speed-sensitive switch oil extraction-Fill valve in the oil distributing valve group is carried out switch control, make the phase angle of control signal and the angle of swing of polyphase multi-rhythm stepped plunger piston hydraulic motor projecting shaft fit like a glove, guarantee that each plunger of oil hydraulic motor can both be discharged to return opening to hydraulic oil by speed-sensitive switch oil extraction-Fill valve in the backhaul process, in the process process, can both pass through speed-sensitive switch high-pressure oil feed valve or speed-sensitive switch oil extraction-Fill valve from pressure hydraulic fluid port or return opening oil suction;
(2) opening time of control speed-sensitive switch high-pressure oil feed valve, make corresponding plunger, have only part-time pressure oil can enter the plunger cavity of oil hydraulic motor, promote the plunger acting by speed-sensitive switch high-pressure oil feed valve in the oil suction stage;
All the other time plunger cavities in oil suction stage are the speed-sensitive switch oil extraction-Fill valve by communicating with return opening all, directly from the return opening oil suction, replenish the cavity that plunger motion produces, but can not promote the plunger acting, guarantee that the average output torque of oil hydraulic motor is directly proportional with the dutycycle of displacement in whole plunger oil suction stroke of speed-sensitive switch high-pressure oil feed valve opening time section inner plunger;
(3) by the real-time regulated to displacement dutycycle in whole plunger oil suction stroke of speed-sensitive switch high-pressure oil feed valve opening time section inner plunger, the average torque that output is directly proportional with dutycycle has realized that the change moment of torsion of polyphase multi-rhythm stepped plunger piston hydraulic motor is controlled; Pass between dutycycle and the average torque is:
Dutycycle=X
Open* 2n=T/ (D * P * η
Machine* η
Valve),
Wherein: X
OpenBe the plunger displacement in the speed-sensitive switch high-pressure oil feed valve opening time section, n is the rotating speed of polyphase multi-rhythm stepped plunger piston hydraulic motor output shaft, the average torque of T for needing to obtain, and D is the discharge capacity of polyphase multi-rhythm stepped plunger piston hydraulic motor, P is the pressure of pressure hydraulic fluid port, η
MachineBe the mechanical efficiency of polyphase multi-rhythm stepped plunger piston hydraulic motor, η
ValveEfficient for oil distributing valve group control plunger cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100679366A CN100458184C (en) | 2007-04-10 | 2007-04-10 | Polyphase multi-rhythm stepped plunger piston hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100679366A CN100458184C (en) | 2007-04-10 | 2007-04-10 | Polyphase multi-rhythm stepped plunger piston hydraulic motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101033760A CN101033760A (en) | 2007-09-12 |
| CN100458184C true CN100458184C (en) | 2009-02-04 |
Family
ID=38730456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100679366A Expired - Fee Related CN100458184C (en) | 2007-04-10 | 2007-04-10 | Polyphase multi-rhythm stepped plunger piston hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100458184C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452928B (en) * | 2013-08-26 | 2016-01-20 | 浙江海聚科技有限公司 | A kind of hydraulic logic motor and controlling method thereof |
| CN111749945B (en) * | 2020-06-29 | 2021-05-11 | 浙江大学 | Sheet type hydraulic stepping driver based on high-speed switch valve and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4981201A (en) * | 1988-08-12 | 1991-01-01 | Paul D. Asmus | Variable drive apparatus |
| CN2411372Y (en) * | 1999-10-22 | 2000-12-20 | 李世六 | Axial multigroup piston type hydraulic variable desplacement pump or variable speed motor |
| DE10030282A1 (en) * | 2000-06-20 | 2002-01-10 | Sauer Danfoss Nordborg As Nord | Hydraulic driving device with hydraulic motor and bearing supporting output shaft |
| CN1563730A (en) * | 2004-04-06 | 2005-01-12 | 胡世璇 | Hydraulic motor using self-lubricating composite material as friction assistant |
| CN1648502A (en) * | 2005-01-24 | 2005-08-03 | 浙江大学 | Electric control one-way valve |
| CN2761935Y (en) * | 2005-01-24 | 2006-03-01 | 浙江大学 | Sea water hydraulic electrically controlled one-way valve |
-
2007
- 2007-04-10 CN CNB2007100679366A patent/CN100458184C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4981201A (en) * | 1988-08-12 | 1991-01-01 | Paul D. Asmus | Variable drive apparatus |
| CN2411372Y (en) * | 1999-10-22 | 2000-12-20 | 李世六 | Axial multigroup piston type hydraulic variable desplacement pump or variable speed motor |
| DE10030282A1 (en) * | 2000-06-20 | 2002-01-10 | Sauer Danfoss Nordborg As Nord | Hydraulic driving device with hydraulic motor and bearing supporting output shaft |
| CN1563730A (en) * | 2004-04-06 | 2005-01-12 | 胡世璇 | Hydraulic motor using self-lubricating composite material as friction assistant |
| CN1648502A (en) * | 2005-01-24 | 2005-08-03 | 浙江大学 | Electric control one-way valve |
| CN2761935Y (en) * | 2005-01-24 | 2006-03-01 | 浙江大学 | Sea water hydraulic electrically controlled one-way valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101033760A (en) | 2007-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100424361C (en) | Closed electrohydraulic controlling system | |
| CN107882786B (en) | Static and dynamic flow real-time matching system of closed pump control single-rod hydraulic cylinder | |
| CN103982478B (en) | A kind of hydraulic system of hydraulic machine of stepless speed regulation | |
| CN106402060A (en) | Direct drive type volume control electrohydraulic servo hydraulic system for hydraulic press | |
| CN100458184C (en) | Polyphase multi-rhythm stepped plunger piston hydraulic motor | |
| CN103174490B (en) | Hydraulic pressure variable valve device based on rotor control | |
| CN101033727B (en) | Plunger-type quantitative hydraulic motor on-off changeable torque valve-controlled oil distributing components and control method | |
| CN201080903Y (en) | Multiphase step plunger piston hydraulic motor | |
| CN100538066C (en) | Electrohydraulic valve variable torque is joined the quantitative plunger piston hydraulic motor of oil type rotating cylinder cartridge type | |
| CN100588837C (en) | Plunger type quantitative hydraulic motor electro-hydraulic switch torque-changing oil dispensing subassembly | |
| CN207750305U (en) | Realize the hydraulic control device of oil cylinder of hydraulic headstock gear travel synchronization automatic deviation correction | |
| CN103832416B (en) | Hydraulic machinery rotary braking energy reuse device | |
| CN206830550U (en) | The open type pump that can reversely export | |
| CN101403366B (en) | Plunger hydraulic motor mechanical-hydraulic leading switch variable-torque oil-distribution component and torque-changing method | |
| CN201080911Y (en) | Plunger type quantitative hydraulic motor switch torque-changing valve-controlled oil dispensing subassembly | |
| CN201080904Y (en) | Electro-hydraulic switch torque-changing oil-dispensing type rotating cylinder barrel type quantitative plunger piston hydraulic motor | |
| CN105382324B (en) | A kind of lock formula plate shearing machine hydraulic control system | |
| CN108533556A (en) | A kind of repairing switching valve and control system for enclosed and open system switching | |
| CN211474417U (en) | Open hydraulic pump and open hydraulic system | |
| CN201228690Y (en) | Plunger hydraulic motor mechanical-hydraulic leading switch variable-torque oil-distribution assembly | |
| CN208764008U (en) | Hydraulic system of chassis | |
| CN203641137U (en) | Motor energy-saving system for open hydraulic system | |
| CN203099277U (en) | Oil pump with changeable discharge capacity | |
| CN208089646U (en) | High speed and high pressure converts cylinder system | |
| CN201896697U (en) | Rotary cylinder barrel plunger hydraulic motor independent in oil absorption and extraction adjustment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG UNIVERSITY; APPLICANT Free format text: FORMER OWNER: HANGZHOU HUIXIANG ELECTROHYDRAULIC TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20071026 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20071026 Address after: 310027 No. 38, Zhejiang Road, Hangzhou, Zhejiang, Xihu District Applicant after: Zhejiang University Co-applicant after: Hangzhou Huixiang Electrohydraulic Technology Development Co., Ltd. Address before: Hangzhou City, Zhejiang province Xihu District 310013 Ancient Jade Road 149, room 310 Applicant before: Hangzhou Huixiang Electrohydraulic Technology Development Co., Ltd. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20080530 Address after: 38, Da Da Lu, Xihu District, Zhejiang, Hangzhou Province, China: 310027 Applicant after: Zhejiang University Co-applicant after: Hangzhou Huixiang Electromechanical Control Engineering Co., Ltd. Address before: 38, Da Da Lu, Xihu District, Zhejiang, Hangzhou Province, China: 310027 Applicant before: Zhejiang University Co-applicant before: Hangzhou Huixiang Electrohydraulic Technology Development Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HANGZHOU HUIXIANG CONTROL OF THE ELECTRICAL AND ME Free format text: FORMER NAME: ZHEJIANG UNIVERSITY |
|
| CP03 | Change of name, title or address |
Address after: Five Hangzhou Road, Zhejiang province Xihu District science and Technology Park of West Lake Xiyuan No. 16 2B Building 1 floor, zip code: 310030 Co-patentee after: Zhejiang University Patentee after: Hangzhou Hui Xiang mechanical and Electrical Control Engineering Co., Ltd. Address before: No. 38, Zhejiang Road, Xihu District, Zhejiang, Hangzhou: 310027 Co-patentee before: Hangzhou Huixiang Electromechanical Control Engineering Co., Ltd. Patentee before: Zhejiang University |
|
| ASS | Succession or assignment of patent right |
Owner name: HANGZHOU YUKONG ELECTROMECHANICAL ENGINEERING Free format text: FORMER OWNER: HANGZHOU HUIXIANG ELECTROMECHANICAL CONTROL ENGINEERING CO., LTD. Effective date: 20100830 |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 310030 1/F, FACTORY BUILDING 2B, NO.16, ROAD 5, XIHU SCIENCE AND TECHNOLOGYPARK (WEST), XIHU DISTRICT, HANGZHOU CITY, ZHEJIANG PROVINCE TO: 310015 SHANGCHENG TECHNOLOGY INDUSTRIAL BASE, 3/F, BUILDING 2, NO.1418-15, MOGANSHAN ROAD, HANGZHOU CITY, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100830 Address after: Hangzhou City, Zhejiang province 310015 Moganshan Road No. 2, 1418-15 building 3 floor (Shangcheng science and technology industrial base) Co-patentee after: Zhejiang University Patentee after: Hangzhou Yukong Mechanical & Electrical Engineering Co., Ltd. Address before: Five 310030 Hangzhou Road, Zhejiang province Xihu District science and Technology Park of West Lake Xiyuan No. 16 2B Building 1 floor Co-patentee before: Zhejiang University Patentee before: Hangzhou Huixiang Electromechanical Control Engineering Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090204 Termination date: 20130410 |