CN1300470C - Hydraulic cylinder controlled hydraulic transformer - Google Patents
Hydraulic cylinder controlled hydraulic transformer Download PDFInfo
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- CN1300470C CN1300470C CNB2004100669248A CN200410066924A CN1300470C CN 1300470 C CN1300470 C CN 1300470C CN B2004100669248 A CNB2004100669248 A CN B2004100669248A CN 200410066924 A CN200410066924 A CN 200410066924A CN 1300470 C CN1300470 C CN 1300470C
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- hydraulic cylinder
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- transformer
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- 239000003921 oil Substances 0.000 claims abstract description 93
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 8
- 239000002828 fuel tank Substances 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000010727 cylinder oil Substances 0.000 claims description 2
- 238000000151 deposition Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000036651 mood Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The present invention relates to a hydraulic device, more specifically to a hydraulic transformer controlled by a hydraulic cylinder. The present invention is composed of components of the hydraulic transformer, and a control part of the components, wherein the components of the hydraulic transformer and the control part are connected; the outer shell of the hydraulic transformer is mainly composed of a shell, a rear end cover and a front end cover, and a main shaft, a cylinder body, a distributing disc, a central shaft, a connecting rod and a plunger are arranged in the outer shell; the control part is positioned in the juncture of the rear end cover and the shell of the hydraulic transformer, and is connected with a three-position four-way electromagnetic change valve respectively oil paths from both ends of a double action type hydraulic cylinder; the inlet of the electromagnetic change valve is connected with a hydraulic oil source and an oil tank respectively through the oil paths. Due to a transmission type structure which is controlled by the hydraulic cylinder and is formed by the double action type hydraulic cylinder and the distributing disc, the present invention can output great force to control the rotation of the distributing disc, and uses the electromagnetic change valve to control the reciprocating motion of the hydraulic cylinder so as to control the rightward rotation and the leftward rotation of the distributing disc with flexible and reliable control. The double action type hydraulic cylinder of the present invention has the function of flexible control and regulation, and has the advantages of compact structure and small volume.
Description
Technical field
The present invention relates to a kind of hydraulic element, specifically is the hydraulic transformer with oil hydraulic cylinder control.
Background technique
The constant pressure network secondary regulation technology that development in recent years is got up has improved the flexibility and the efficient of hydraulic system, be subjected to common people and pay close attention to, but this technology exists certain defective to restrict its application in Hydraulic Field.Because aspect rotary driving load,, can realize rotating the driving of load by the controlling mechanism of Moderator Variable oil hydraulic motor; But, but there is not good solution for driving the straight line load that different loads pressure requires.At the existence of this problem, people have designed a kind of novel hydraulic device---hydraulic transformer, and hydraulic transformer is updated and optimized, and make it further adapt to actual demand.Publication number CN1455119A, title " a kind of hydraulic transformer " is disclosed to be a kind of hydraulic transformer, on this basis, people invent the hydraulic transformer of using manually control or controlling with stepper motor again.People require to control hydraulic transformer with oil hydraulic cylinder now.
Summary of the invention
The object of the present invention is to provide a kind of hydraulic transformer that adopts oil hydraulic cylinder control, make the ouput force of this hydraulic transformer control thrust plate rotation bigger; By adopting the commutation of solenoid directional control valve, realize the left rotation and right rotation of thrust plate.Utilize the double-acting hydraulic cylinder structure, can realize the setting and the control of hydraulic transformer pressure regulation ratio accurately, reliably.
The present invention seeks to such realization: by the hydraulic transformer with oil hydraulic cylinder control that hydraulic transformer member and control section thereof constitute, the hydraulic transformer member is connected with control section; The hydraulic transformer shell mainly is made up of housing, rear end cover and front cover, and housing and rear end cover, front cover are fastenedly connected respectively; In enclosure interior main shaft, cylinder body, thrust plate, central shaft, connecting rod, plunger are housed, main shaft is installed on the interior bearing of housing, and an end of central shaft is installed in the ball-and-socket of main shaft, and the other end is installed in the center hole of cylinder body; One end roll extrusion of plunger and connecting rod is bound up, the connecting rod the other end connects mutually with the ball-and-socket of main shaft, plunger is installed in the plunger cavity of cylinder body, thrust plate is contained between cylinder body and the rear end cover, it is characterized in that control section is in the rear end cover and the housing intersection of hydraulic transformer, connects with housing and rear end cover respectively mutually by bolt.Described control section is made up of double-acting hydraulic cylinder, solenoid directional control valve, hydraulic oil source and fuel tank; Double-acting hydraulic cylinder two outlets link to each other with solenoid directional control valve with second oil circuit by first oil circuit respectively, and the solenoid directional control valve entry end connects oil sources by the 3rd oil circuit, by the 4th oil circuit connected tank.
The useful effect that the present invention has is: the special construction design of oil hydraulic cylinder makes oil hydraulic cylinder and thrust plate form oil hydraulic cylinder control transmission type structure, can realize output more energetically, controls more reliable; By the solenoid directional control valve control oil channel, make control be swift in response flexibly in the hydraulic system; Adopt the double-acting hydraulic cylinder of special construction design, not only can realize the function of flexible regulating and controlling, and compact structure, volume reduced.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the control section structural representation that the present invention analyses and observe at A-A;
Fig. 3 is the worm's eye view of hydraulic cylinder shell of the present invention;
Fig. 4 is the side view and the B-B sectional drawing of hydraulic cylinder shell of the present invention;
Fig. 5 is hydraulic cylinder piston of the present invention and C-C sectional view;
Fig. 6 is housing view of the present invention and D-D cutaway view Amplified image;
Fig. 7 is thrust plate profile of the present invention and E-E sectional view and F-F revolved sectional view;
Fig. 8 is that the axial plane sectional view of housing of the present invention and G are to view;
Fig. 9 is that Fig. 8 middle shell H is to zoomed-in view;
Figure 10 is the enlarged front view and the K-K sectional view of rear end cover of the present invention;
Figure 11 is the amplification rearview of rear end cover of the present invention.
Among Fig. 1: the 1st, control section, the 2nd, rear end cover, the 3rd, thrust plate, the 4th, housing, the 5th, bolt, the 6th, cylinder body, the 7th, central shaft, the 8th, plunger, the 9th, connecting rod, the 10th, main shaft, the 11st, front cover.
Among Fig. 2: the 12nd, hydraulic cylinder shell, the 13rd, hydraulic cylinder piston, the 14th, oil hydraulic cylinder housing, the 15th, oil hydraulic cylinder side cover, the 16th, side end cap, the 17th, solenoid directional control valve, the 18th, hydraulic oil source, the 19th, fuel tank, the 20th, double-acting hydraulic cylinder, the 21,22,23, the 24th, oil circuit, DT1 is position, a left side electromagnet, DT2 is a right position electromagnet, and I is the outer chamber of oil hydraulic cylinder, and II is the oil hydraulic cylinder inner layer cavity.
Among Fig. 3: the 31st, rectangular opening, the 36th, O type ring recess.
Among Fig. 5: the 32nd, left side axial bore, the 33rd, left radial through hole, the 34th, right radial through hole, the 35th, right side axial bore.
Among Fig. 8: the 25, the 26, the 27th, tapped hole.
Among Figure 11: the 28, the 29, the 30th, tapped hole.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, the hydraulic transformer shell mainly is made up of housing 4, rear end cover 2 and front cover 11, and housing 4 is fastenedly connected respectively with rear end cover 2 and front cover 11; In housing 4 inside main shaft 10, cylinder body 6, thrust plate 3, central shaft 7, connecting rod 9, plunger 8 are housed, main shaft 10 is installed on the bearing in the housing 4, and an end of central shaft 7 is installed in the ball-and-socket of main shaft 10, and the other end is installed in the center hole of cylinder body 6; Plunger 8 is bound up with an end roll extrusion of connecting rod 9, connecting rod 9 the other ends connect mutually with the ball-and-socket of main shaft 10, plunger 8 is installed in the plunger cavity of cylinder body 6, thrust plate 3 is contained between cylinder body 6 and the rear end cover 2, control section 1 is in the rear end cover 2 and housing 4 intersections of hydraulic transformer, connects mutually with housing 4 and rear end cover 2 respectively by screw 5.
As shown in Figure 2, control section 1 is made up of double-acting hydraulic cylinder 20, solenoid directional control valve 17, hydraulic oil source 18 and fuel tank 19; 20 liang of outlets of double-acting hydraulic cylinder link to each other with solenoid directional control valve 17 with second oil circuit 22 by first oil circuit 21 respectively, and solenoid directional control valve 17 entry ends connect oil sources 18 by the 3rd oil circuit 23, by the 4th oil circuit 24 connected tanks 19.
Described double-acting hydraulic cylinder 20 mainly is made of hydraulic cylinder shell 12, hydraulic cylinder piston rod 13, oil hydraulic cylinder housing 14, oil hydraulic cylinder side cover 15 and side end cap 16; Hydraulic cylinder shell 12 connects and composes the outer chamber I of oil hydraulic cylinder with the side end cap 16 at two ends, in I inside, the outer chamber of oil hydraulic cylinder oil hydraulic cylinder housing 14 is installed; Oil hydraulic cylinder housing 14 constitutes oil hydraulic cylinder inner layer cavity II with the oil hydraulic cylinder side cover 15 at two ends, hydraulic cylinder piston rod 13 intermediate sections are at oil hydraulic cylinder inner layer cavity II two ends, pass the oil hydraulic cylinder side cover 15 and the side end cap 16 of both sides respectively, hydraulic cylinder piston rod 13 two ends are tightened to the center by two side end caps 16 by two shaft shoulder faces, hydraulic cylinder piston rod 13 is fixed with respect to the outer chamber I of oil hydraulic cylinder, there is not axial restraint between oil hydraulic cylinder inner layer cavity II and the hydraulic cylinder piston rod 13, axially slide relative.
As shown in Figure 3, Figure 4, have a rectangular opening 31 in the lower end surface of hydraulic cylinder shell 12, by tooth bar on the oil hydraulic cylinder housing 14 in the outer chamber I of these rectangular opening 31 realization oil hydraulic cylinders and the gear teeth meshing on the outer thrust plate 3 of the outer chamber I of oil hydraulic cylinder; Hydraulic cylinder shell 12 position therebetween is provided with two steps, on two steps, have three through holes, respectively with rear end cover 2 on three tapped holes 28,29,30 and three tapped holes 25,26,27 on the housing 4 match, be fixed in respectively between rear end cover 2 and the housing 4 by 6 bolts 5; Be processed with screw thread respectively on the inner hole wall at hydraulic cylinder shell 12 two ends, tighten with the screw-thread fit of processing on the side end cap 16, form the outer chamber I of oil hydraulic cylinder, fixed hydraulic cylinder piston rod 13 seals by seal ring between side end cap 16 and the hydraulic cylinder shell 12 simultaneously; Hydraulic cylinder shell 12 has the O type ring recess 36 in the ring week of depositing seal ring on bottom surface.
As shown in Figure 5, hydraulic cylinder piston rod 13 has the left radial through hole 33 and the right radial through hole 34 of adjacent parallel in the intermediate portion, hydraulic cylinder piston rod 13 two ends have left side axial bore 32 and right side axial bore 35, to communicating with left radial through hole 33, right side axial bore 35 self-hydraulic cylinder piston rods 13 right endpoints are dark in communicating with right radial through hole 34 deeply for left side axial bore 32 self-hydraulic cylinder piston rods 13 left end points; Hydraulic cylinder piston rod 12 two ends are processed with two shaft shoulder faces, are used for by the position of two side end cap 16 fixed hydraulic cylinder piston rods 12.
As shown in Figure 6, the lower end surface of oil hydraulic cylinder housing 14 is processed as rack structure, is meshed with the gear teeth on thrust plate 3 peripheries, constitutes oil hydraulic cylinder control structure; The outside at oil hydraulic cylinder housing 14 two ends is processed with screw thread, with the threads engaged of two oil hydraulic cylinder side covers, 15 inboard processing, forms oil hydraulic cylinder inner layer cavity II.
As shown in Figure 7, the tooth bar that is processed with on the oil hydraulic cylinder housing 14 in the outer chamber I of the gear teeth and oil hydraulic cylinder of the periphery of thrust plate 3 is meshed.
As Fig. 8, shown in Figure 9, housing 4 has three tapped holes 25,26,27 at the upper side that is connected an end with rear end cover 2, is used for connecting the oil hydraulic cylinder 20 of control section 1.
As Figure 10, shown in Figure 11, rear end cover 2 also has three tapped holes 28,29,30 at the upper side that is connected an end with housing 4, is used for connecting the oil hydraulic cylinder 20 of control section 1.
Hydraulic transformer is when work, the transformation ratio of hydraulic transformer is changed, only need make thrust plate 3 get final product along the hour hands or be rotated counterclockwise of wherein being in a good mood, the implementation procedure that transformation ratio is regulated control is: when control signal is sent, when making the left side position electromagnet DT1 of solenoid directional control valve 17 charged, solenoid directional control valve 17 is realized position, left side function, the hydraulic oil of hydraulic oil source 18 outputs is through position, the 3rd oil circuit 23 input solenoid directional control valves, 17 left side, behind solenoid directional control valve 17, by its position, left side function output, arrive double-acting hydraulic cylinder 20 left side filler openings through first oil circuit 21; Hydraulic oil enters double-acting hydraulic cylinder 20 through the left side of hydraulic cylinder piston rod 13 axial bore 32, enter into the left chamber of the oil hydraulic cylinder inner layer cavity II that forms by oil hydraulic cylinder housing 14 and two oil hydraulic cylinder side covers 15 again by the left radial through hole 33 of hydraulic cylinder piston rod 13, and the masterpiece that oil pressure is produced is used on each wall in left chamber, the mutual balance of axial force on the left chamber wall face is offset, radial force acts on the hydraulic cylinder piston rod 13 respectively to the right, act on left on the oil hydraulic cylinder side cover 15 in left side, because hydraulic cylinder piston rod 13 is fixed by the side end cap 16 of double-acting hydraulic cylinder 20, hydraulic cylinder piston rod 13 maintains static, and the oil hydraulic cylinder inner layer cavity II that is made up of oil hydraulic cylinder housing 14 and two oil hydraulic cylinder side covers 15 can be to left movement under left radial force effect on the oil hydraulic cylinder side cover 15 in left side.At oil hydraulic cylinder inner layer cavity II during to left movement, the tooth bar on oil hydraulic cylinder housing 14 downsides is also to left movement, and then drives thrust plate 3 peripheries and the gear teeth tooth bar engagement, thereby the counter clockwise direction that realizes thrust plate 3 is rotated.At oil hydraulic cylinder inner layer cavity II left in the movement process, its right side cavity dwindles gradually, fluid in the cavity of right side is extruded, flow out double-acting hydraulic cylinder 20 through right radial through hole 34 and right side axial bore 35, arrive solenoid directional control valve 17 through second oil circuit 22 again, after solenoid directional control valve 17 left side function, flow back to fuel tank 19 through the 4th oil circuit 24.So just realized that thrust plate 3 counterclockwise rotates the adjusting transformation ratio.When adjusting reaches satisfactory value, position, the left side electromagnet DT1 dead electricity of control signal output solenoid directional control valve 17, solenoid directional control valve 17 is in the meta function, and double-acting hydraulic cylinder 20 two ends oil circuits are all blocked, double-acting hydraulic cylinder 20 is parked in the fixed position, and the transformation ratio of hydraulic transformer is fixed.In like manner, in the time will making that thrust plate 3 clockwise directions rotate the transformation ratio of regulator solution pressure transformer, only need send control signal, make that the right position electromagnet DT2 of solenoid directional control valve 17 is charged, the right position function that realizes solenoid directional control valve 17 gets final product, and its working procedure and said process are just the opposite.
Claims (5)
1, a kind of hydraulic transformer that constitutes by hydraulic transformer member and control section (1) thereof with oil hydraulic cylinder control, the hydraulic transformer member is connected with control section (1); The hydraulic transformer shell is made up of housing (4), rear end cover (2) and front cover (11), and housing (4) is fastenedly connected respectively with rear end cover (2), front cover (11); In housing (4) inside main shaft (10), cylinder body (6), thrust plate (3), central shaft (7), connecting rod (9), plunger (8) are housed, main shaft (10) is installed on the interior bearing of housing (4), one end of central shaft (7) is installed in the ball-and-socket of main shaft (10), and the other end is installed in the center hole of cylinder body (6); Plunger (8) is bound up with an end roll extrusion of connecting rod (9), connecting rod (9) the other end connects mutually with the ball-and-socket of main shaft (10), plunger (8) is installed in the plunger cavity of cylinder body (6), thrust plate (3) is contained between cylinder body (6) and the rear end cover (2), it is characterized in that control section (1) is in the rear end cover (2) and housing (4) intersection of hydraulic transformer, connects with housing (4) and rear end cover (2) respectively mutually by bolt (5); Control section (1) is made up of double-acting hydraulic cylinder (20), solenoid directional control valve (17), hydraulic oil source (18) and fuel tank (19); Double-acting hydraulic cylinder (20) two outlets link to each other with solenoid directional control valve (17) with second oil circuit (22) by first oil circuit (21) respectively, solenoid directional control valve (17) entry end connects oil sources (18) by the 3rd oil circuit (23), by the 4th oil circuit (24) connected tank (19).
2, the hydraulic transformer with oil hydraulic cylinder control that is made of hydraulic transformer member and control section (1) thereof according to claim 1 is characterized in that double-acting hydraulic cylinder (20) is made of hydraulic cylinder shell (12), hydraulic cylinder piston rod (13), oil hydraulic cylinder housing (14), oil hydraulic cylinder side cover (15) and side end cap (16); Hydraulic cylinder shell (12) constitutes the outer chamber (I) of oil hydraulic cylinder with the side end cap (16) at its two ends, in inside, the outer chamber (I) of oil hydraulic cylinder oil hydraulic cylinder housing (14) is installed; Oil hydraulic cylinder housing (14) constitutes oil hydraulic cylinder inner layer cavity (II) with the oil hydraulic cylinder side cover (15) at two ends, hydraulic cylinder piston rod (13) intermediate section is at oil hydraulic cylinder inner layer cavity (II) two ends, the oil hydraulic cylinder side cover (15) and the side end cap (16) of both sides passed at the two ends of hydraulic cylinder piston rod (13) respectively, hydraulic cylinder piston rod (13) two ends are spacing by two side end caps (16) by the shaft shoulder on it, make hydraulic cylinder piston rod (13) fixing with respect to the outer chamber of oil hydraulic cylinder (I), there is not axial restraint between oil hydraulic cylinder inner layer cavity (II) and the hydraulic cylinder piston rod (13), axially slide relative.
3, the hydraulic transformer that constitutes by hydraulic transformer member and control section (1) thereof according to claim 2 with oil hydraulic cylinder control, the lower end surface that it is characterized in that oil hydraulic cylinder housing (14) is processed as rack structure, be meshed with the gear teeth on thrust plate (3) periphery, constitute oil hydraulic cylinder control structure; Have a rectangular opening (31) in the lower end surface of hydraulic cylinder shell (12), by the tooth bar on this rectangular opening (31) realization double-acting hydraulic cylinder housing (14) and the engagement of the wheel toothing on the thrust plate (3); Hydraulic cylinder piston rod (13) has the left radial through hole (33) and the right radial through hole (34) of adjacent parallel in the intermediate portion, hydraulic cylinder piston rod (13) two ends have left side axial bore (32) and right side axial bore (35), to communicating with left radial through hole (33), right side axial bore (35) self-hydraulic cylinder piston rod (13) right endpoint is dark in communicating with right radial through hole (34) deeply for left side axial bore (32) self-hydraulic cylinder piston rod (13) left end point; Hydraulic cylinder shell (12) position therebetween is provided with two steps, on two steps, have three through holes, each three through hole on two steps respectively with rear end cover (2) on three tapped holes (28,29,30) and three tapped holes (25,26,27) on the housing (4) is connected, by 6 bolts (5) rear end cover (2) and hydraulic cylinder shell (12), housing (4) and hydraulic cylinder shell (12) are fixed.
4, the hydraulic transformer that constitutes by hydraulic transformer member and control section (1) thereof according to claim 1 with oil hydraulic cylinder control, it is characterized in that housing (4) has three tapped holes (25 at the upper side that is connected an end with rear end cover (2), 26,27), rear end cover (2) also has three tapped holes (28 at the upper side that is connected an end with housing (4), 29,30), three tapped holes (25 on the housing (4), 26,27), three tapped holes (28 on the rear end cover (2), 29,30) match with the through hole that has on hydraulic cylinder shell (12) two steps respectively, control section (1) is fixed on housing (4) and rear end cover (2) joint by 6 bolts (5).
5, the hydraulic transformer that constitutes by hydraulic transformer member and control section (1) thereof according to claim 2 with oil hydraulic cylinder control, it is characterized in that being processed with screw thread respectively on the inner hole wall at hydraulic cylinder shell (12) two ends, screw thread of processing on the inner hole wall and side end cap (16) are gone up the screw-thread fit of processing and are tightened, form the outer chamber (I) of oil hydraulic cylinder, fixed hydraulic cylinder piston rod (13) seals by seal ring between side end cap (16) and the hydraulic cylinder shell (12) simultaneously; Hydraulic cylinder shell (12) has the O type ring recess (36) in the ring week of depositing seal ring on bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100669248A CN1300470C (en) | 2004-09-30 | 2004-09-30 | Hydraulic cylinder controlled hydraulic transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100669248A CN1300470C (en) | 2004-09-30 | 2004-09-30 | Hydraulic cylinder controlled hydraulic transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1621699A CN1621699A (en) | 2005-06-01 |
| CN1300470C true CN1300470C (en) | 2007-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100669248A Expired - Fee Related CN1300470C (en) | 2004-09-30 | 2004-09-30 | Hydraulic cylinder controlled hydraulic transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN1300470C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598142B (en) * | 2009-07-09 | 2010-12-29 | 山东交通学院 | Difunctional vane type hydraulic transformer controlled by motor |
| CN105545835A (en) * | 2015-12-18 | 2016-05-04 | 哈尔滨工业大学 | Parallel-connection type inclined shaft type hydraulic transformer |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614226B (en) * | 2009-07-14 | 2011-06-15 | 刘顺安 | Internal opening hydraulic transformer and transformer method |
| CN102155474B (en) * | 2011-03-15 | 2013-06-19 | 北京理工大学 | Electric hydraulic control mechanism of hydraulic pressure transformer |
| CN102434504B (en) * | 2011-12-09 | 2014-02-12 | 哈尔滨工业大学 | Hydraulic transformer with axial flow distribution |
| CN102878124B (en) * | 2012-09-21 | 2015-04-29 | 中国船舶重工集团公司第七一九研究所 | Load-sensitive hydraulic transformer |
| CN105864124B (en) * | 2016-05-04 | 2017-08-15 | 太原科技大学 | A kind of hydraulic transformer with twin-rotor housing |
| CN114396398B (en) * | 2021-11-30 | 2023-10-10 | 河南航天液压气动技术有限公司 | Active load shedding gear pump and hydraulic system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08189459A (en) * | 1994-06-13 | 1996-07-23 | Wals Gabriele Van Der | Hydraulic transformer,pump or fluid motor |
| US6109884A (en) * | 1996-10-16 | 2000-08-29 | Hirose Valve Industry Co. Ltd. | Rotational hydraulic transformer |
| US6116138A (en) * | 1996-02-23 | 2000-09-12 | Innas Free Piston B.V. | Pressure transformer |
| US6460333B2 (en) * | 2000-12-22 | 2002-10-08 | Caterpillar Inc. | Hydraulic pressure transformer |
| CN1455119A (en) * | 2003-06-02 | 2003-11-12 | 浙江大学 | Hydraulic transformer |
| CN1526960A (en) * | 2003-09-25 | 2004-09-08 | 浙江大学 | Single rod equal area double acting hydraulic cylinder capable of balancing weight |
-
2004
- 2004-09-30 CN CNB2004100669248A patent/CN1300470C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08189459A (en) * | 1994-06-13 | 1996-07-23 | Wals Gabriele Van Der | Hydraulic transformer,pump or fluid motor |
| US6116138A (en) * | 1996-02-23 | 2000-09-12 | Innas Free Piston B.V. | Pressure transformer |
| US6109884A (en) * | 1996-10-16 | 2000-08-29 | Hirose Valve Industry Co. Ltd. | Rotational hydraulic transformer |
| US6460333B2 (en) * | 2000-12-22 | 2002-10-08 | Caterpillar Inc. | Hydraulic pressure transformer |
| CN1455119A (en) * | 2003-06-02 | 2003-11-12 | 浙江大学 | Hydraulic transformer |
| CN1526960A (en) * | 2003-09-25 | 2004-09-08 | 浙江大学 | Single rod equal area double acting hydraulic cylinder capable of balancing weight |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598142B (en) * | 2009-07-09 | 2010-12-29 | 山东交通学院 | Difunctional vane type hydraulic transformer controlled by motor |
| CN105545835A (en) * | 2015-12-18 | 2016-05-04 | 哈尔滨工业大学 | Parallel-connection type inclined shaft type hydraulic transformer |
| CN105545835B (en) * | 2015-12-18 | 2017-06-06 | 哈尔滨工业大学 | A kind of parallel connection type inclined shaft type hydraulic transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1621699A (en) | 2005-06-01 |
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Granted publication date: 20070214 Termination date: 20120930 |