CN1184207A - Hydraulic system for driving axial piston type hydraulic motor - Google Patents
Hydraulic system for driving axial piston type hydraulic motor Download PDFInfo
- Publication number
- CN1184207A CN1184207A CN96120894A CN96120894A CN1184207A CN 1184207 A CN1184207 A CN 1184207A CN 96120894 A CN96120894 A CN 96120894A CN 96120894 A CN96120894 A CN 96120894A CN 1184207 A CN1184207 A CN 1184207A
- Authority
- CN
- China
- Prior art keywords
- oil
- wobbler
- valve
- hydraulic motor
- piston
- 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.)
- Pending
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
A hydraulic system for driving an axial piston type hydraulic motor wherein a swash plate can tilt normally/reversely at a right angle to a shaft. The hydraulic system comprises a swash plate cylinder; one rod end of which is connected to the swash plate; a pair of springs by which the swash plate piston can be biased to one end of its stroke in the swash plate cylinder a valve being switched over between its neutral state having an inner passage connecting a pair of chambers said swash plate cylinder each other and stage for moving said swash plate piston the predetermined direction by applying an oil to the selected chamber: an inlet passage installed between an inlet port of the hydraulic motor and a hydraulic motor and a hydraulic pump; an oulet passage installed between an oulet port of the hydraulic motor and a tank; a main control valve installed in the inlet passage, for opening or shutting the inlet passage in response to a predetermined signal; ......
Description
The present invention relates to the hydraulic system of driving axial piston type oil hydraulic motor (reaching) hereinafter to be referred as hydraulic pressure.
Existing axial-piston hydraulic motor has been described in korean patent application No.95-23419.
As shown in Figure 1, the axial piston motor in the existing invention comprises: a housing 1; One cylinder body 2 that can in housing 1, rotate; One axle 3 that is connected with cylinder body 2; The oil cylinder 4a and the 4b that in cylinder body 2, along the circumferential direction distribute; Be installed in double action plunger 5a and 5b in oil cylinder 4a and the 4b respectively; One subtend oil cylinder 4a and 4b fuel feeding also receive the logical hydraulic fluid port A and the B of the oil that flows out from oil cylinder 4a and 4b; One will lead to the valve plate 7 that hydraulic fluid port A, B are connected with oil cylinder 4a, 4b; And a wobbler 6, the basal plane of this wobbler contacts with an end of the driveshaft of plunger 5a, 5b, and this wobbler with respect to the angle of inclination of axle 3 can to just/anti-both direction rotates a right angle.
Existing axial-piston hydraulic motor according to said structure, when wobbler changes a right angle with respect to the angle of inclination of axle, this oil hydraulic motor can be correspondingly rotates to positive and negative direction, so can fix as filler opening one of in a pair of logical hydraulic fluid port, another is then as oil outlet.Therefore, when changing the sense of rotation of oil hydraulic motor, do not need to switch into and out of hydraulic fluid port.
The object of the present invention is to provide a kind of effectively hydraulic system of driving axial piston type oil hydraulic motor, wherein, wobbler can change a right angle to positive and negative direction with respect to the angle of inclination of axle, and can prevent cavitation corrosion and reversing phenomenon.
The invention provides a kind of hydraulic system of driving axial piston type oil hydraulic motor, wherein, wobbler can change a right angle to positive and negative direction with respect to the angle of inclination of axle, and this hydraulic system comprises: a wobbler oil cylinder; One is installed in the in-oil cylinder double action wobbler of wobbler plunger, and an end of the driveshaft of plunger is connected with wobbler; A pair ofly be positioned at the spring that the wobbler oil cylinder is pressed to the wobbler piston at its stroke one end; One valve that can between neutral state and drive condition, switch; When valve is in neutral state, there is an internal channel to connect a pair of chamber of wobbler oil cylinder, when valve during, oil can be led in the selected chamber at activation point, make this wobbler plunger move to predetermined direction; One is arranged on the filler opening of oil hydraulic motor and the oil inlet passage between the oil hydraulic pump; One is installed in the oil discharge passage between oil hydraulic motor oil outlet and the fuel tank; Be installed in the main control valve in the oil inlet passage, be used for opening or closing oil inlet passage according to prearranged signals; Be installed in the channel switch valve in the oil discharge passage, be used for opening or closing oil discharge passage according to prearranged signals, be arranged in the oil discharge passage, two ends are connected to the bypass path on the precalculated position of front and back of channel switch valve; An and safety valve that is installed in the bypass path.
According to preferred feature of the present invention, can adopt a remote-controlled valve to send signal to valve and main control valve simultaneously.
According to another preferred feature of the present invention, when the pressure in the oil inlet passage between main control valve and the filler opening rose, above-mentioned channel switch valve was just along with switching to the position of opening oil discharge passage.
Describe embodiments of the invention with reference to the accompanying drawings in detail.In the accompanying drawing:
Fig. 1 is the structure sectional view of existing axial-piston hydraulic motor;
Fig. 2 is the hydraulic pipe line figure according to the hydraulic system of the driving axial piston type oil hydraulic motor of the embodiment of the invention.
Fig. 2 represents the hydraulic system according to one embodiment of the present of invention.
The oil hydraulic motor that adopts according to the hydraulic system of present embodiment is identical with existing oil hydraulic motor.This oil hydraulic motor comprises a housing 1; One is installed in rotating cylinder body 2 in the housing 1; One axle 3 that is connected with cylinder body 2; Along the circumferential direction be arranged in oil cylinder 4a, 4b in the cylinder body 2; Be installed in double action plunger 5a, 5b in oil cylinder 4a, the 4b respectively; A pair ofly be used for to oil cylinder 4a, 4b supply oil and receive logical hydraulic fluid port A, the B of the oil that flows out from oil cylinder 4a, 4b; One will lead to the valve plate 7 that hydraulic fluid port A, B are connected with oil cylinder 4a, 4b; And a wobbler 6, an end in contact of the driveshaft of the basal plane of this wobbler and plunger 5a, 5b, and this swash plate with respect to the angle of inclination of axle 3 can just/anti-both direction rotates a right angle.
According to hydraulic system of the present invention one wobbler oil cylinder 9 is arranged; One is installed in the double action wobbler piston 10 in the wobbler oil cylinder 9, and an end of the driveshaft of this piston is connected with wobbler 6.Above-mentioned wobbler piston 10 is by a pair of spring 11a, the 11b pressurization that is installed in respectively among wobbler oil cylinder chamber 9a, the 9b.When wobbler piston 10 when just/in the other direction moving, wobbler 6 with respect to the angle of inclination of axle 3 just to just/right angle of counter-rotation.When wobbler piston 10 was in neutral state, wobbler 6 and wobbler piston 10 were positioned at such state, and at this moment, swash plate meets at right angles with axle 3.
On the other hand, a pair of oily passage 12a, 12b and a valve 13 are arranged in oil hydraulic motor, be used for making in the wobbler oil cylinder 9 wobbler piston 10 to just/anti-both direction moves.Valve 13 is used for opening or closing this a pair of oily passage 12a, 12b, according to prearranged signal, a pair of chamber 9a, the 9b of oil hydraulic pump P and wobbler oil cylinder 9 is communicated with.
When valve 13 was in neutral position, it had an internal channel, a pair of chamber 9a and the 9b of wobbler oil cylinder 9 can be connected to each other; When valve 13 switches to primary importance, there is an internal channel that a chamber 9a and oil hydraulic pump P are communicated with, another chamber 9b then is communicated with fuel tank T; Perhaps when valve 13 switches to the second place, have an internal channel that another chamber 9b and oil hydraulic pump P are communicated with, and chamber 9a and fuel tank T are communicated with.
On the other hand, an oil inlet passage 21 is connected between oil hydraulic pump P and the filler opening A, and an oil discharge passage 22 is connected between fuel tank T and the oil outlet B.Main control valve 23 is installed on the oil inlet passage 21, is used for opening or cut off oil inlet passage according to prearranged signals.One channel switch valve 24 has been installed on oil discharge passage 22, has been used for opening or cut off oil discharge passage according to prearranged signals.Article one, bypass passageways 25 is installed on the oil discharge passage 22, and its two ends are connected on the precalculated position of front and rear of channel switch valve 24.Safety valve 26 is installed on the bypass passageways 25.
On the other hand, a remote-controlled valve 14 is used for giving valve 13 and main control valve 23 simultaneously with prearranged signals.When the user handled remote-controlled valve 14 with the driving oil hydraulic motor, main control valve 23 was just opened oil inlet passage 21, and the oil that emits from oil hydraulic pump P just infeeds filler opening A.Simultaneously, when remote control control valve 14 sends to valve 13 with signal, when making the oil of discharging among the oil hydraulic pump P infeed among a pair of chamber 9a of wobbler oil cylinder 9 and the 9b one, wobbler 6 just tilts.
On the other hand, channel switch valve 24 switches to a kind of like this state, and at this moment, oil discharge passage 22 is opened owing to the pressure in the oil inlet passage 21 between main control valve 23 and filler opening A rises.
Describe the working procedure and the effect of present embodiment below in detail.
Under the forward rotation situation, remote-controlled valve 14 sends a pressure signal to main control valve 23 at oil hydraulic motor.Correspondingly, main control valve 23 is opened oil inlet passage 21, and the oil that emits from oil hydraulic pump P infeeds filler opening A by the oil inlet passage of opening 21.When the pressure in the oil inlet passage 21 rose, channel switch valve 24 just switched to primary importance, and at this moment, oil discharge passage 22 is opened, and oil flows back to by this oil discharge passage 22.Simultaneously, an electromagnetic coil of valve 13 1 ends also given pressure signal by remote-controlled valve 14, makes valve 13 switch to primary importance from neutral state.So the oil that ejects from oil hydraulic pump P is the internal channel and the passage 12a of the valve 13 by switching to primary importance just, infeeds among the chamber 9a of wobbler oil cylinder 9.As shown in Figure 2, wobbler piston 10 elastic force that overcomes spring 11a moves up.When wobbler piston 10 moved, the wobbler 6 that is connected with wobbler piston 10 just tilted to postive direction, so oil hydraulic motor is just to forward rotation.
Under the counter-rotational situation of oil hydraulic motor, remote-controlled valve 14 is given main control valve 23 with pressure signal.Correspondingly, main control valve is opened oil inlet passage 21, and the oil that ejects from oil hydraulic pump P infeeds filler opening A by the oil inlet passage of opening 21.When the pressure in the oil inlet passage 21 rose, channel switch valve 24 just switched to such position, and at this moment, oil discharge passage 22 is opened, and oil flows back to by this oil discharge passage 22.Simultaneously, another electromagnetic coil of valve 13 also given pressure signal by remote-controlled valve 14, makes valve 13 switch to the second place from neutral state.So the oil that ejects is the internal channel and the passage 12b of the valve 13 by switching to the second place just, infeed another chamber 9b of wobbler oil cylinder 9 from oil hydraulic pump P.As shown in Figure 2, wobbler piston 10 elastic force that overcomes spring 11b moves up.When wobbler piston 10 motion, the wobbler 16 that is connected with wobbler piston 10 is inclination in the opposite direction just, so just backward rotation of oil hydraulic motor.
Under oil hydraulic motor situation out of service, remote-controlled valve 14 stops to send signals to main control valve 23.Simultaneously, main control valve 23 is closed oil inlet passage 21, and channel switch valve 24 then switches to such position, and at this moment, oil discharge passage 22 is closed owing to the pressure in the oil inlet passage 21 descends.Oil flows back to by the safety valve 26 bypass path 25 and the bypass path 25 from oil outlet B.Simultaneously, remote-controlled valve 14 also stops to send pressure signal to the electromagnetic coil of valve 13, so valve 13 is in neutral state.The oil that ejects from oil hydraulic pump P directly flows back to fuel tank T.Therefore, the internal channel of a pair of chamber 9a in the wobbler oil cylinder 9 and the 9b valve 13 by being in neutral state is communicated with, and therefore, chamber 9a can exchange mutually with oil among the 9b.The wobbler piston is owing to neutral state is got back in the effect of spring 11a and 11b, so wobbler 6 meets at right angles with axle 3.Although oil hydraulic motor is rotated further when wobbler 6 meets at right angles with axle, and piston 5a, 5b have stopped motion fully.Do not produce spontaneous pressure because filler opening A oil starvation and oil outlet B can not occur, so cavitation corrosion phenomenon and reversing phenomenon can not occur.
Claims (3)
1. the hydraulic system of a driving axial piston type oil hydraulic motor is characterized in that, wobbler with respect to the angle of inclination of axle can to just/right angle of counter-rotation, this hydraulic system comprises:
One wobbler oil cylinder;
One is installed in the in-oil cylinder double action wobbler of wobbler piston, and an end of the driveshaft of this piston is connected with described wobbler;
The a pair of in-oil cylinder spring that described wobbler piston can be pressed onto an end of this stroke of piston of described wobbler that is positioned at;
One valve that can between neutral state and other state, switch, this valve has the internal channel of a pair of chamber of the described wobbler oil cylinder of a connection, when other state when neutral state, can be by oil being infeeded selecteed chamber, and make described wobbler piston move along predetermined direction;
One is arranged on the oil inlet passage between described oil hydraulic motor filler opening and the oil hydraulic pump;
One is arranged on the oil discharge passage between described oil hydraulic motor oil outlet and the fuel tank;
One is installed in the main control valve on the described oil inlet passage, is used for opening or closing described oil inlet passage according to prearranged signals;
One is installed in the channel switch valve in the described oil discharge passage, is used for opening or closing described oil discharge passage according to prearranged signals;
One is arranged on the bypass path on the described oil discharge passage, and its two ends are connected on the precalculated position of described channel switch valve front and back; And
Be installed in the safety valve in the described bypass path.
2. the hydraulic system of driving axial piston type oil hydraulic motor as claimed in claim 1 is characterized in that, it also comprises a remote-controlled valve, and this remote-controlled valve can send signal to described valve and described main control valve simultaneously.
3. the hydraulic system of driving axial piston type oil hydraulic motor as claimed in claim 1, it is characterized in that, described channel switch valve switches to the position that described output channel is opened along with the rising of the oil inlet passage pressure between described main control valve and described filler opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96120894A CN1184207A (en) | 1996-12-05 | 1996-12-05 | Hydraulic system for driving axial piston type hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96120894A CN1184207A (en) | 1996-12-05 | 1996-12-05 | Hydraulic system for driving axial piston type hydraulic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1184207A true CN1184207A (en) | 1998-06-10 |
Family
ID=5126643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96120894A Pending CN1184207A (en) | 1996-12-05 | 1996-12-05 | Hydraulic system for driving axial piston type hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1184207A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205819B (en) * | 2006-12-19 | 2010-09-29 | 阿尔法·拉瓦尔·莫阿蒂 | Hydraulic motor |
| CN102439312A (en) * | 2009-05-26 | 2012-05-02 | 胡斯可国际股份有限公司 | Compact eccentric radial piston hydraulic machine |
| CN102016185B (en) * | 2008-04-25 | 2012-07-18 | 卡亚巴工业株式会社 | Control device for hybrid construction machine |
| CN103148041A (en) * | 2013-03-07 | 2013-06-12 | 北京理工大学 | Energy-saving active/passive load double electrohydraulic servo valve control system and control method thereof |
| CN105370643A (en) * | 2015-12-23 | 2016-03-02 | 北汽福田汽车股份有限公司 | Engineering machinery and closed type hydraulic system thereof |
| CN107246893A (en) * | 2017-04-28 | 2017-10-13 | 防城港市海河堤管理站 | Hydrologic monitoring device with trigger mechanism |
-
1996
- 1996-12-05 CN CN96120894A patent/CN1184207A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101205819B (en) * | 2006-12-19 | 2010-09-29 | 阿尔法·拉瓦尔·莫阿蒂 | Hydraulic motor |
| CN102016185B (en) * | 2008-04-25 | 2012-07-18 | 卡亚巴工业株式会社 | Control device for hybrid construction machine |
| CN102439312A (en) * | 2009-05-26 | 2012-05-02 | 胡斯可国际股份有限公司 | Compact eccentric radial piston hydraulic machine |
| CN103148041A (en) * | 2013-03-07 | 2013-06-12 | 北京理工大学 | Energy-saving active/passive load double electrohydraulic servo valve control system and control method thereof |
| CN103148041B (en) * | 2013-03-07 | 2015-11-18 | 北京理工大学 | The controlling method of two electro-hydraulic servo valve control systems of the main passive load of a kind of energy-saving type |
| CN105370643A (en) * | 2015-12-23 | 2016-03-02 | 北汽福田汽车股份有限公司 | Engineering machinery and closed type hydraulic system thereof |
| CN107246893A (en) * | 2017-04-28 | 2017-10-13 | 防城港市海河堤管理站 | Hydrologic monitoring device with trigger mechanism |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20020071771A1 (en) | Hydraulic drive system for piston pumps | |
| US3977603A (en) | Fluid delivery system | |
| CN113266610B (en) | Radial plunger hydraulic device adopting hydraulic control check valve for flow distribution and working method | |
| CN1865687A (en) | Fuel pump for an internal combustion engine | |
| CN1184207A (en) | Hydraulic system for driving axial piston type hydraulic motor | |
| CN111017014B (en) | Hydraulic steering device | |
| CN215171264U (en) | Servo system for thrust vector control | |
| WO2014156539A1 (en) | Opposed swashplate-type hydraulic rotary machine | |
| JP2000220568A (en) | Variable displacement hydraulic pump | |
| CN1033052C (en) | Regulator for a variable displacement pump | |
| CN1576583A (en) | Pump control override for tandem pumps | |
| US20230136445A1 (en) | Servoless motor | |
| US5836160A (en) | Hydraulic system for driving axial piston type hydraulic motor | |
| EP0508555B1 (en) | Switching device for reciprocating pumps | |
| CN217354621U (en) | Multi-displacement axial plunger pump | |
| US5934560A (en) | Engine fuel injector | |
| CN1155771C (en) | Fittings for hydraulic operation | |
| JP3787063B2 (en) | Displacement control device for variable displacement pump | |
| US4431379A (en) | Valve piston for constant displacement pump | |
| GB1335194A (en) | Apparatus operating on the positive displacement principle and usable as a fluid pump or as a motor | |
| CN117028189A (en) | Plunger pump | |
| EP0767306A1 (en) | machine for pumping building materials | |
| JPS643827Y2 (en) | ||
| CN114704447A (en) | Power control valve block, closed pump assembly and engineering machinery | |
| RU2062366C1 (en) | Hydraulic drive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: SAMSUNG HEAVY INDUSTRIES CO., LTD. TO: VOLVO CONSTRUCTION EQUIPMENT(COREA)LTD. |
|
| CP03 | Change of name, title or address |
Address after: Seoul Applicant after: Volvo Construction Equipment (Korea) Co., Ltd. Address before: Changwon City, Korea Applicant before: Samsung Heavy Industries Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: VOLVO CONSTRUCTION EQUIPMENT HOLDINGS(SWEDEN)LTD. Free format text: FORMER OWNER: VOLVO CONSTRUCTION EQUIPMENT(COREA)LTD. Effective date: 20020301 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20020301 Address after: Swedish Eskil steynor Applicant after: Volvo Building Equipment Holding (Sweden) AG Address before: Changwon, Korea Applicant before: Volvo Construction Equipment (Korea) Co., Ltd. |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1056360 Country of ref document: HK |