CN104196804B - Buncher control without leak servo valve - Google Patents
Buncher control without leak servo valve Download PDFInfo
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- CN104196804B CN104196804B CN201410473472.9A CN201410473472A CN104196804B CN 104196804 B CN104196804 B CN 104196804B CN 201410473472 A CN201410473472 A CN 201410473472A CN 104196804 B CN104196804 B CN 104196804B
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Abstract
The present invention relates to a kind of power and control integrated electrohydraulic servo valve, especially a kind of buncher control without leak servo valve, belong to electro-hydraulic servo control technical field. According to technical scheme provided by the invention, described buncher control without leak servo valve, comprise buncher drive metering governor motion, control valve piece and the high-pressure oil pump being connected with buncher; Be positioned at fuel-displaced number and the direction of Leakless valve control electrohydraulic servo valve of valve piece; And the switch of Leakless valve depends on dummy piston and high-pressure oil pump completely; Due to the metering governor motion control that dummy piston and high-pressure oil pump are driven by buncher, therefore make the turnover oil mass of Leakless valve and the rotating speed of buncher with turn to proportional. The present invention realizes power drive and servo-controlled integrated, has solved servo valve and has had large, the inefficient defect of internal leakage, has improved the reliability of servoelement.
Description
Technical field
The present invention relates to a kind of power and control integrated electrohydraulic servo valve, especially a kind of buncher control without leak servo valve, belong to electro-hydraulic servo control technical field.
Background technology
Electrohydraulic servo valve is the core Hydraulic Elements in electrohydraulic servo-controlling system, is the conversion links between electrical appliance control signal and hydraulic power drive. Common electrohydraulic servo valve is a guiding valve that relies on torque-motor, force motor or proportion electro-magnet etc. to drive, and leaks because guiding valve exists, and therefore common servo valve wastes greatlyr, and efficiency is very low. Simultaneously, because the driving force of torque-motor or proportion electro-magnet is limited, easily there is spool jam, the reliability that makes servo valve not as other Hydraulic Elements high.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of buncher control without leak servo valve, can realize power drive and servo-controlled integrated, solve servo valve and had large, the inefficient defect of internal leakage, improve the reliability of servo valve.
According to technical scheme provided by the invention, described buncher control without leak servo valve, comprise valve piece and be positioned at the Leakless valve of valve piece with for regulating the dummy piston of described Leakless valve on off state; The shutdown side of dummy piston by oil pump outlet line be connected for the oil pump of pump oil in valve piece, oil pump be connected for the buncher that drives described oil pump; Buncher and valve interblock are also provided with fuel control mechanism, by fuel control mechanism make the turnover oil mass of Leakless valve and the rotating speed of buncher proportional.
Described fuel control mechanism comprises the measurement gear group being driven by buncher, and the oil drain quantity of measurement gear group is two times of oil pump oil pump capacity; Measurement gear group is connected with the opening end of dummy piston by the second metering oil pipe, and measurement gear group is connected with regulating piston installation cavity in valve piece by the first metering oil pipe.
Install in described regulating piston installation cavity for regulating the regulating piston of in line check valve on off state and for making the reciprocating regulating spring of regulating piston; In line check valve and Leakless valve are all positioned at valve piece; Dummy piston is installed in dummy piston installation cavity, is connected with dummy piston shutdown side cavity for the in line check valve installation cavity that in line check valve is installed.
Arranged outside limited valve and the oil sucting one-way valve of described dummy piston opening end, the oil sucting one-way valve installation cavity of described oil sucting one-way valve is connected with installation cavity the second adjusting portion in dummy piston opening end cavity, regulating piston installation cavity; On valve piece, arranging can be to the oil suction oil pipe of oil-feed in oil sucting one-way valve and the oil return pipe that the oil of installation cavity the second adjusting portion in regulating piston installation cavity can be exported, and the binding site of described the first metering oil pipe and valve piece is between in line check valve and oil return pipe.
Described Leakless valve is connected with oil cylinder by oil cylinder oil pipe, and the oil inlet end of oil pump is connected with oil pump fuel tank by pump inlet pipe.
Described buncher comprises servomotor, stepper motor or variable-frequency motor, and two-way fuel-displaced oil pump comprises gear pump, vane pump, high-pressure plunger pump.
Described oil suction oil pipe and oil return pipe are all connected with oil suction fuel tank.
Dummy piston shutdown side cavity is connected with in line check valve installation cavity by the first interface channel; Dummy piston opening end cavity is connected with the second metering oil pipe and oil sucting one-way valve installation cavity by the second interface channel.
Advantage of the present invention: directly control dummy piston with buncher and go to regulate a Leakless valve to realize SERVO CONTROL, rely on buncher directly to drive two-way fuel-displaced oil pump simultaneously, pump valve is integrated, realized power drive and servo control integrated; In the time of buncher forward, the oil mass of oil pump is entered to oil cylinder by Leakless valve, in the time that buncher reverses, the oil mass of oil pump and the oil pump capacity of oil cylinder all enter the opening end of dummy piston again by measurement gear group, with by the on off state of dummy piston control Leakless valve, thoroughly solve the large and reliability low shortcoming of internal leakage that servo valve exists, achieved electrohydraulic servo system to low energy consumption, highly reliable transformation.
Brief description of the drawings
Fig. 1 is use state diagram of the present invention.
Fig. 2 is rating curve schematic diagram of the present invention.
Description of reference numerals: 1-buncher, 2-oil pump, 3-measurement gear group, 4-Leakless valve, 5-pressure limiting valve, 6-oil sucting one-way valve, 7-in line check valve, 8-dummy piston, 9-regulating piston, 10-valve piece, 11-load, 12-oil cylinder, 13-oil pump fuel tank, 14-pump inlet pipe, 15-oil pump outlet line, 16-first measures oil pipe, 17-second measures oil pipe, 18-oil suction oil pipe, 19-oil suction fuel tank, 20-oil return pipe, 21-regulating spring, 22-spill port, 23-oil cylinder oil pipe, 24-regulating piston installation cavity, 25-the first interface channel, 26-dummy piston installation cavity, 27-pressure limiting valve installation cavity, 28-oil sucting one-way valve installation cavity, 29-in line check valve installation cavity, 30-Leakless valve installation cavity and 31-the second interface channel.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Figure 1: in order to realize power drive and servo-controlled integrated, solve servo valve and had the defect that internal leakage is large, improve the reliability of servo valve, the present invention includes valve piece 10 and be positioned at the Leakless valve 4 of valve piece 10 with for regulating the dummy piston 8 of described Leakless valve 4 on off states; The shutdown side of dummy piston 8 by oil pump outlet line 15 with for being connected to the oil pump 2 of the interior pump oil of valve piece 10, oil pump 2 is connected with the buncher 1 for driving described oil pump 2; Between buncher 1 and valve piece 10, be also provided with fuel control mechanism, by fuel control mechanism make the turnover oil mass of Leakless valve 4 and the rotating speed of buncher 1 proportional.
Particularly, in valve piece 10, be provided with Leakless valve installation cavity 30, Leakless valve 4 is installed in Leakless valve installation cavity 30, and Leakless valve 4 is connected with oil cylinder 12 by oil cylinder oil pipe 23, on oil cylinder 12, be connected with load 11, oil cylinder oil pipe 23 is connected with Leakless valve installation cavity 30. In valve piece 10, be provided with dummy piston installation cavity 26, dummy piston 8 is installed in dummy piston installation cavity 26, the contiguous Leakless valve 4 of shutdown side of dummy piston 8, and the opening end of dummy piston 8 is away from Leakless valve 4. Dummy piston 8 is T-shaped shape, and dummy piston 8 can be in the interior movement of dummy piston installation cavity 26. Dummy piston 8 is separated described dummy piston installation cavity 26 to be two parts dummy piston installation cavity 26 is interior, i.e. part-dummy piston shutdown side the cavity corresponding with dummy piston shutdown side and the part-dummy piston opening end cavity corresponding with dummy piston opening end, dummy piston shutdown side cavity is mutually isolated and is not communicated with dummy piston opening end cavity. The end of dummy piston 8 can contact with Leakless valve 4, and dummy piston 8 coaxially distributes with Leakless valve 4, and dummy piston 8 is by compressing the spring of Leakless valve 4 after contacting with the spool of Leakless valve 4, to open Leakless valve 4; After Leakless valve 4 is opened, Leakless valve installation cavity 30 is connected with dummy piston shutdown side cavity; After the active force on dummy piston 8 disappears, Leakless valve 4 resets under spring action, realizes closing of Leakless valve 4.
Oil pump 2 adopts two-way fuel-displaced oil pump structure, and no matter driving buncher 1 is forward or reverse, and oil pump 2 all can pass through oil pump outlet line 15 to pump oil in dummy piston shutdown side cavity. Oil pump 2 is arranged on the output shaft of buncher 1, in the time of buncher 1 forward, it is fuel-displaced to oil cylinder 12 by Leakless valve 4 and oil cylinder oil pipe 23 that oil pump 2 pumps into oil in dummy piston shutdown side cavity, and in the time that buncher 1 reverses, the oil in oil cylinder 12 passes through oil cylinder oil pipe 23 to the interior oil-feed of valve piece 10.
In the embodiment of the present invention, by fuel control mechanism make the turnover oil mass of Leakless valve 4 and the rotating speed of buncher 1 proportional, specifically refer to, in the time of buncher 1 forward, by fuel control mechanism, make Leakless valve 4 proportional to the oil pump capacity of oil cylinder 12 and the rotating speed of buncher 1; And in the time that buncher 1 reverses, by fuel control mechanism, make oil cylinder 12 also proportional with the rotating speed of buncher 1 to the oil inlet quantity of Leakless valve 4, as shown in Figure 2. In the time that the rotating speed of buncher 1 and applied signal voltage are also proportional, identical with typical servo valve characteristic for the discharge characteristic between Leakless valve 4 and oil cylinder 12, can be used in various electrohydraulic servo systems.
In the specific implementation, described buncher 1 comprises servomotor, stepper motor or variable-frequency motor, and oil pump 2 comprises high-pressure gear pump, vane pump, plunger displacement pump. In the time that oil pump 2 adopts high-pressure plunger pump, the servo valve obtaining can be used in the high pressure servo system of 70MPa.
Described fuel control mechanism comprises the measurement gear group 3 being driven by buncher 1, and the oil drain quantity of measurement gear group 3 is two times of oil pump 2 oil pump capacity; Measurement gear group 3 is connected with the opening end of dummy piston 8 by the second metering oil pipe 17, and measurement gear group 3 is connected by the interior regulating piston installation cavity 24 of the first metering oil pipe 16 and valve piece 10.
In the embodiment of the present invention, measurement gear group 3 is also installed on the output shaft of buncher 1, be that measurement gear group 3 is synchronizeed and driven by buncher 1 with oil pump 2, proportional with the oil pump capacity of control oil pump 2 and the rotating speed of buncher 1, the oil pump capacity of measurement gear group 3 is also proportional with the rotating speed of buncher 1. the structure of measurement gear group 3 can be similar existing gear pump structure, but measurement gear group 3 is in buncher 1 forward, when reversion is different, the fuel-displaced direction difference of measurement gear group 3, between the oil pump capacity of measurement gear group 3 and oil pump 2 oil pump capacity, can be also other multiple relations, but can cause the disadvantageous result of servo-drive system, therefore, when concrete enforcement, the oil pump capacity of general measurement gear group 3 is set to two times of oil pump 2 oil pump capacity, the concrete structure of fuel control mechanism is not the emphasis that the present invention pays close attention to, and specifically implementing structure also can determine and obtain by the art personnel are unique, repeat no more herein.
The interior installation of described regulating piston installation cavity 24 is for regulating the regulating piston 9 of in line check valve 7 on off states and for making the reciprocating regulating spring 21 of regulating piston 9; In line check valve 7 and Leakless valve 4 are all positioned at same one end of valve piece 10; Dummy piston 8 is installed in dummy piston installation cavity 26, is connected for the in line check valve installation cavity 29 dummy piston installation cavity 26 corresponding with dummy piston 8 shutdown sides that in line check valve 7 is installed.
In the embodiment of the present invention, in line check valve 7 is installed in line check valve installation cavity 29, in line check valve installation cavity 29 is all positioned at valve piece 10 with Leakless valve installation cavity 30, and in the time that in line check valve 7 is closed, the oil in dummy piston shutdown side cavity can not enter in regulating piston installation cavity 24. regulating piston 9 is also class T font, and regulating spring 21 and in line check valve 7 lay respectively at the two ends of regulating piston 9, and one end of regulating spring 21 is connected with the diapire of regulating piston installation cavity 24, and the other end stretches in regulating piston 9 and is connected with regulating piston 9. regulating piston installation cavity 24 is also divided into two parts of mutual isolation by regulating piston 9, be respectively installation cavity the first adjusting portion and installation cavity the second adjusting portion, installation cavity the first adjusting portion is mutually isolated and is not communicated with installation cavity the second adjusting portion, the contiguous in line check valve 7 of installation cavity the first adjusting portion, oil in line check valve installation cavity 29 can enter installation cavity the first adjusting portion, according to regulating piston 9, the position in regulating piston installation cavity 24 is different in the band of position of installation cavity the first adjusting portion and installation cavity the second adjusting portion converts, regulating spring 21 is positioned at installation cavity the second adjusting portion. the first metering oil pipe 16 is connected with installation cavity the first adjusting portion. regulating piston 9 coaxially distributes with in line check valve 7, and the spring of in line check valve 7 can be compressed after contacting with the spool of in line check valve 7 in the end of regulating piston 9, thereby can open in line check valve 7. after in line check valve 7 is opened, the oil in line check valve installation cavity 29 can enter in the oil sucting cavity of measurement gear group 3 by the first metering oil pipe 16.
Arranged outside limited valve 5 and the oil sucting one-way valve 6 of described dummy piston 8 opening ends, dummy piston installation cavity 26, regulating piston installation cavity 24 that the oil sucting one-way valve installation cavity 28 of described oil sucting one-way valve 6 is corresponding with dummy piston 8 opening ends are connected, and in the time that pressure limiting valve 5 is opened, can be connected with pressure limiting valve installation cavity 27; On valve piece 10, arranging can be to the oil suction oil pipe 18 of oil sucting one-way valve 6 interior oil-feeds and the oil return pipe 20 that the oil in regulating piston installation cavity 24 can be exported, and the binding site of described the first metering oil pipe 16 and valve piece 10 is between in line check valve 7 and oil return pipe 20.
In the embodiment of the present invention, oil sucting one-way valve 6 is arranged in oil sucting one-way valve installation cavity 28, pressure limiting valve 5 is installed in pressure limiting valve installation cavity 27, oil sucting one-way valve installation cavity 28 is between pressure limiting valve installation cavity 27 and regulating piston installation cavity 24, and oil sucting one-way valve 6 is positioned at the top of regulating spring 21, oil sucting one-way valve installation cavity 28 is connected with installation cavity the second adjusting portion by pipeline. Oil sucting one-way valve installation cavity 27 is connected with dummy piston opening end cavity by the second interface channel 31, and the second metering oil pipe 17 is positive corresponding with the second interface channel 31 with the connection joint portion of valve piece 10. The spool of pressure limiting valve 5 is compared with the contiguous dummy piston 8 of the spring of pressure limiting valve 5, and for oil sucting one-way valve 6, the spring of oil sucting one-way valve 6 is compared with the more contiguous dummy piston 8 of the spool of oil sucting one-way valve 6.
Oil suction oil pipe 18 is positioned on valve piece 10, and be connected with oil sucting one-way valve installation cavity 28 and pressure limiting valve installation cavity 27 by the passage capable of being in valve piece 10, in the time that oil sucting one-way valve 6 is opened, by oil suction oil pipe 18, outside oil is sucked in oil sucting one-way valve installation cavity 6, and in the time that pressure limiting valve 5 is opened, the oil that exceedes setting pressure is overflowed outside valve piece 10 by pressure limiting valve installation cavity 27 and oil suction oil pipe 18, and the oil pressure that makes to enter in the second metering oil pipe 17 keeps a stationary value. Oil return pipe 20 is for discharging the oil entering in regulating piston installation cavity 24 outside valve piece 10, and oil return pipe 20 connects by the spill port 22 on valve piece 10, and the spill port 22 on valve piece 10 is generally conditioned piston 9 shutoff; When regulating piston 9 is in the time moving and open in line check valve 7 in line check valve 7, the oil in installation cavity the second adjusting portion can be flowed out outside valve piece 10 by spill port 22, oil return pipe 20.
In the specific implementation, dummy piston shutdown side cavity is connected with in line check valve installation cavity 29 by the first interface channel 25; Dummy piston shutdown side cavity is connected with the second metering oil pipe 17 and oil sucting one-way valve installation cavity 28 by the second interface channel 31. Described oil suction oil pipe 18 and oil return pipe 20 are all connected with oil suction fuel tank 19. The oil inlet end of oil pump 2 is connected with oil pump fuel tank 13 by pump inlet pipe 14.
In the embodiment of the present invention, in the time of buncher 1 forward, after measurement gear group 3 is rotated, in the interior generation negative pressure of valve piece 10, described negative pressure can make oil sucting one-way valve 6 open and by oil suction oil pipe 18 by the oily inlet valve piece 10 in oil suction fuel tank 19. First the oil entering in valve piece 10 enter in oil sucting one-way valve installation cavity 28, and the oil majority under suction function entering in oil sucting one-way valve installation cavity 28 enters in dummy piston opening end cavity, and a part can enter in installation cavity the second adjusting portion. Enter oil in dummy piston opening end cavity and enter in the second metering oil pipe 17 under measurement gear group 3 produces the effect of negative pressure, and enter the first metering oil pipe 16 by 3 effects of measurement gear group, thereby can enter installation cavity the first adjusting portion. Entering oil in installation cavity the first adjusting portion, to promote regulating piston 9 interior to the direction motion away from line check valve 7 at regulating piston installation cavity 24, and compression adjustment spring 21 is closed in line check valve 7 simultaneously.
Meanwhile, oil pump 2, under buncher 1 forward effect, sucks the oil in oil pump fuel tank 13 by pump inlet pipe 14, and by oil pump outlet line 15, oil pump is entered in dummy piston shutdown side cavity. Because in line check valve 7 is closed, the oil in dummy piston shutdown side cavity can be opened Leakless valve 4, enters in Leakless valve installation cavity 30. The oil entering in Leakless valve installation cavity 30 enters in oil cylinder 12 by oil cylinder oil pipe 23. The oil mass Q that oil pump 2 is exported0=RV× q enters oil cylinder 12 by Leakless valve 4, q be oil pump 2 often turn discharge capacity, the speed of service of oil cylinder 12 by with the rotating speed R of buncher 1VBe directly proportional, realized the flow proportional control of forward.
In the time of buncher 1 antiport, measurement gear group 3 pumps into the oil in measurement gear group 3 oil sucting cavities in valve piece 10 by the second metering oil pipe 17 under buncher 1 drives, enter in dummy piston opening end cavity, oil pump 2, under the driving of buncher 1, enters the oil pump in oil pump fuel tank 13 in dummy piston shutdown side cavity. Due to measurement gear group 3 often turn the twice that often turns discharge capacity that discharge capacity is oil pump 2, and dummy piston 8 is at the area of section of opening end, can make dummy piston 8 move to Leakless valve 4 dummy piston installation cavity 26 is interior, to open Leakless valve 4. After Leakless valve 4 is opened, load 11 is in the pressure P of oil cylinder 12 interior formationLOil in oil cylinder 12 is flowed in Leakless valve installation cavity 30, entering in dummy piston shutdown side cavity by Leakless valve installation cavity 30, then enter in line check valve installation cavity 29 by the first interface channel 25. Measurement gear group 3 is under the antiport of buncher 1 drives, the oil entering in installation cavity the first adjusting portion enters in the oil sucting cavity of measurement gear group 3, regulating piston 9 moves in line check valve 7 regulating piston installation cavity 24 is interior under regulating spring 21 effect, to open in line check valve 7.
After in line check valve 7 is opened, oil pump 2 pumps into the oil that dummy piston shutdown side cavity and oil cylinder 12 flow in Leakless valve installation cavity 30 and all can enter in line check valve installation cavity 29, then enters in the oil sucting cavity of measurement gear group 3 by the first metering oil pipe 16. The flow of the measurement gear group 3 of flowing through is subject to the restriction of buncher 1 rotating speed, can only be Q2=2q×RV, wherein RVFor the rotating speed of buncher 1, q be oil pump 2 often turn discharge capacity, 2q is the discharge capacity of measurement gear group 3, if the pressure P of outer load 11LMake to flow through the flow Q of Leakless valve 41Increase, must make the pressure P at dummy piston 8 shutdown sides1Raise. Due to the fuel-displaced flow Q of oil cylinder 12 of the Leakless valve 4 of flowing through1Be subject to the shutdown side of dummy piston 8, the pressure differential control of opening end, pressure differential Δ P=P0-P1，P0For the force value of dummy piston 8 opening ends, P is larger for pressure differential Δ, Q1Larger. Under extreme case, work as Δ P=P0Time, Leakless valve 4 is all opened; In the time of pressure differential Δ P=0, Leakless valve 4 closes valve. Because measurement gear group 3 fuel-displaced is subject to placing restrictions on of pressure limiting valve 5, as the fuel-displaced P that exceedes of measurement gear group 30Time, can open pressure limiting valve 5, by pressure limiting valve 5 and oil suction oil pipe 18, oil spill is gone out, make the pressure of dummy piston 8 opening ends be always P0, the pressure P of dummy piston 8 shutdown sides1Rising must cause reducing of Δ P, and now Leakless valve 4 will automatically turn down under the effect of spring force, makes flow Q1Decline, until Q1=RVTill × q, on the contrary Q1<RV× q, can make Δ P strengthen, and makes flow Q1Increase Q like this1Constantly follow the tracks of RV× q, the fuel-displaced flow Q of oil cylinder 12 when having realized buncher 1 and reversing1The adjusting relation being directly proportional to buncher 1 rotating speed.
The present invention directly controls dummy piston 8 with buncher 1 and goes to regulate a Leakless valve 4 to realize SERVO CONTROL, relies on buncher 1 directly to drive two-way fuel-displaced oil pump 2 simultaneously, and pump valve is integrated, and has realized power drive and servo control integrated; In the time of buncher 1 forward, the oil mass of oil pump 2 is entered to oil cylinder 12 by Leakless valve 4, in the time that buncher 1 reverses, the oil pump capacity of the oil mass of oil pump 2 and oil cylinder 12 all enters the opening end of dummy piston 8 again by measurement gear group 3, to control the on off state of Leakless valve 4 by dummy piston 8, thoroughly solve the large and reliability low shortcoming of internal leakage that servo valve exists, achieved electrohydraulic servo system to low energy consumption, highly reliable transformation.
Claims (6)
- Buncher control without leaking a servo valve, it is characterized in that: comprise valve piece (10) and be positioned at the Leakless valve (4) of valve piece (10) and for regulating the dummy piston (8) of described Leakless valve (4) on off state; The shutdown side of dummy piston (8) passes through oil pump outlet line (15) and is connected for the two-way fuel-displaced oil pump (2) to the interior pump oil of valve piece (10), and oil pump (2) is connected with the buncher (1) for driving described oil pump (2); Between buncher (1) and valve piece (10), be also provided with fuel control mechanism, by fuel control mechanism make the turnover oil mass of Leakless valve (4) and the rotating speed of buncher (1) proportional;Described fuel control mechanism comprises the measurement gear group (3) being driven by buncher (1), and the oil drain quantity of measurement gear group (3) is a times of oil pump (2) oil pump capacity; Measurement gear group (3) is connected with the opening end of dummy piston (8) by the second metering oil pipe (17), and measurement gear group (3) is connected with the interior regulating piston installation cavity of valve piece (10) (24) by the first metering oil pipe (16).
- Buncher control according to claim 1 without leaking servo valve, it is characterized in that: install in described regulating piston installation cavity (24) and be used for regulating the regulating piston (9) of in line check valve (7) on off state and for making the reciprocating regulating spring of regulating piston (9) (21); In line check valve (7) is all positioned at valve piece (10) with Leakless valve (4), and regulating piston (9) is in valve piece (10); Dummy piston (8) is installed in dummy piston installation cavity (26), is connected with dummy piston shutdown side cavity for the in line check valve installation cavity (29) that in line check valve (7) is installed.
- Buncher control according to claim 2 without leak servo valve, it is characterized in that: the arranged outside limited valve (5) of described dummy piston (8) opening end and oil sucting one-way valve (6), the oil sucting one-way valve installation cavity (28) of described oil sucting one-way valve (6) is connected with installation cavity the second adjusting portion in dummy piston opening end cavity, regulating piston installation cavity (24); On valve piece (10), arranging can be to the oil suction oil pipe (18) of the interior oil-feed of oil sucting one-way valve (6) and the oil return pipe (20) that the oil of interior regulating piston installation cavity (24) installation cavity the second adjusting portion can be exported, and the binding site of described the first metering oil pipe (16) and valve piece (10) is between in line check valve (7) and oil return pipe (20).
- Buncher control according to claim 3 without leak servo valve, it is characterized in that: described oil suction oil pipe (18) and oil return pipe (20) are all connected with oil suction fuel tank (19).
- Buncher control according to claim 1 without leak servo valve, it is characterized in that: described buncher (1) comprises servomotor, stepper motor or variable-frequency motor, two-way fuel-displaced oil pump comprises gear pump, vane pump or high-pressure plunger pump.
- Buncher control according to claim 2 without leak servo valve, it is characterized in that: dummy piston shutdown side cavity is connected with in line check valve installation cavity (29) by the first interface channel (25); Dummy piston opening end cavity is connected with the second metering oil pipe (17) and oil sucting one-way valve installation cavity (28) by the second interface channel (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410473472.9A CN104196804B (en) | 2014-09-16 | 2014-09-16 | Buncher control without leak servo valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410473472.9A CN104196804B (en) | 2014-09-16 | 2014-09-16 | Buncher control without leak servo valve |
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| CN104196804A CN104196804A (en) | 2014-12-10 |
| CN104196804B true CN104196804B (en) | 2016-05-04 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1138425B (en) * | 1981-06-16 | 1986-09-17 | Stigler Otis S P A | ELECTRO-FLUID DYNAMIC COMPLEX FOR THE OPERATION OF A CABIN OF AN ELEVATOR SYSTEM |
| DE3704845C2 (en) * | 1987-02-16 | 1996-02-22 | Rexroth Mannesmann Gmbh | Electro-hydraulic servo valve with additional electric drive |
| CN100451355C (en) * | 2007-01-12 | 2009-01-14 | 路文忠 | Electrohydraulic servo oil cylinder and numerical control machine tool using same |
| DE102009021833A1 (en) * | 2009-05-19 | 2010-11-25 | Robert Bosch Gmbh | Hydraulic drive and rotary valve for a hydraulic drive |
| CN101571155A (en) * | 2009-05-26 | 2009-11-04 | 薛国光 | Digital electric-hydraulic synchronous control system |
| CN103806406B (en) * | 2014-02-24 | 2015-08-26 | 浙江大学宁波理工学院 | A kind of wave making machine based on hydraulic driving mode |
| CN204164069U (en) * | 2014-09-16 | 2015-02-18 | 无锡市三信传动控制有限公司 | The No leakage servovalve that speed-adjustable motor controls |
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2014
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