CN108547815A - Multifunctional rotating motor overflow valve - Google Patents
Multifunctional rotating motor overflow valve Download PDFInfo
- Publication number
- CN108547815A CN108547815A CN201810518879.7A CN201810518879A CN108547815A CN 108547815 A CN108547815 A CN 108547815A CN 201810518879 A CN201810518879 A CN 201810518879A CN 108547815 A CN108547815 A CN 108547815A
- Authority
- CN
- China
- Prior art keywords
- valve core
- right end
- spring
- pole socket
- left end
- 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.)
- Withdrawn
Links
- 230000003139 buffering effect Effects 0.000 claims abstract description 27
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000000872 buffer Substances 0.000 claims description 15
- 238000013016 damping Methods 0.000 claims description 6
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a kind of Multifunctional rotating motor overflow valves, it is characterized in that, including pole socket, the left end of pole socket is equipped with sealing cover, the right end of pole socket is set in the left end of coupling sleeve and is connected with each other, pole socket and the outside of coupling sleeve junction are equipped with valve body, buffering valve rod is equipped in pole socket, the right end of buffering valve rod is set in the left end of spring base and is connected with each other, the outside of spring base is equipped with the first spring, the both ends of first spring are separately connected spring base right end and buffering valve rod, the right end of spring base and the left end of poppet valve core connect, the left end of poppet valve core is set in the right end of spring base, the right end of poppet valve core matches with the valve core case on the right side of it, the outside of poppet valve core is equipped with ball valve core, the outside of coupling sleeve set between ball valve core and valve body there are one be used for control ball valve core opening size second spring.The present invention can realize reduction impact, realize buffering, and can play the role of repairing, can be widely applied in the rotary systems such as excavator, crane, churning driven.
Description
Technical field
The present invention relates to a kind of Multifunctional rotating motor overflow valves, are suitable for the engineering machines such as excavator, crane, churning driven
Tool belongs to hydraulic valve class product technical field.
Background technology
For excavator etc. turns round the engineering machinery of class, the startup of swing mechanism stops that prodigious impact can be brought.
In addition when rotary motor stops, the oil inlet and outlet of multi-way valve is closed, and due to inertia, rotary motor at this time becomes pump condition, former
First oil inlet is emptied, and will produce huge abnormal sound.Common solution is exactly two overflows of setting on hydraulic circuit
Valve, two check valves each serve as absorption impact, the effect of repairing are carried out to vacuum chamber.
It is emptied in order to prevent, added two check valves of hydraulic motor, for processing, assembling, needs additional add
Work and assembly time can thus improve processing cost, reduce the competitiveness of enterprise.
Invention content
The technical problem to be solved by the present invention is to：Solve be emptied in order to prevent and on hydraulic motor increased two lists
To valve so that processing and assembly time are long, the problem of high processing costs.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is to provide a kind of Multifunctional rotating motor overflows
Valve, which is characterized in that including pole socket, the left end of pole socket is equipped with sealing cover, and the right end of pole socket is set in the left end of coupling sleeve and phase
It connects, the outside of pole socket and coupling sleeve junction is equipped with valve body, buffering valve rod is equipped in pole socket, the right end for buffering valve rod is set to
It in the left end of spring base and is connected with each other, the outside of spring base is equipped with the first spring, and the both ends of the first spring are separately connected spring
Seat right end and buffering valve rod, the right end of spring base and the left end of poppet valve core connect, and the left end of poppet valve core is set to the right end of spring base
Interior, the right end of poppet valve core matches with the valve core case on the right side of it, and the outside of poppet valve core is equipped with ball valve core, and the outside of coupling sleeve is located at
The second spring of control ball valve core opening size is used for there are one being set between ball valve core and valve body.
Preferably, multiple throttle orifices are equipped on the poppet valve core and buffering valve rod.
Preferably, the valve core case and poppet valve core have annular gap throttling, the pole socket that buffering valve rod coordinates with it to have ring
Shape gap throttles.
Preferably, the right end of the poppet valve core is the conical surface.
Preferably, the conical surface of the poppet valve core is sealed with valve core case, and the left end of poppet valve core is set in the endoporus of spring base,
Form ring-shaped throttling damping；It buffers valve rod right end and is equipped with throttle orifice, buffer the inner hole of valve rod right end and spring base, form ring
Shape throttle buffers valve rod left end and pole socket clearance fit.
The present invention is mounted in the Hydraulic slewing systems such as excavator, when swing mechanism starts and stops, can delaying be
System pressure rising gradient, realizes pressure buffer, reduces impact, and can play the role of repairing when rotary motor is braked, prevents from inhaling
Empty abnormal sound.Can realize reduction impact, realize buffering, and repairing can be played the role of, can be widely applied to excavator, crane,
In the rotary systems such as churning driven.
Compared with existing hydraulic system, it is mounted with that the hydraulic system of the present invention has the advantages that：
1, the overflow valve integrates secondary buffer and repairing function, and delicate structure is easily installed simultaneously；
2, the application of the overflow valve can reduce by two check valves, reduce processing and assembly time, reduce cost；
3, the unique secondary buffer design of the overflow valve reduces compression shock, extends the system element service life；
4, the overflow valve has larger prospect of the application and economic benefit.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of Multifunctional rotating motor overflow valve；
Fig. 2 is to apply forward and backward rotary motor system contrast schematic diagram；
Fig. 3 is the rotary motor scheme of installation using the multi-functional overflow valve of the utility model.
Specific implementation mode
In order to make the present invention more obvious and understandable, hereby with preferred embodiment, and attached drawing is coordinated to be described in detail below.
The present invention is a kind of Multifunctional rotating motor overflow valve, which is mounted on the working connection of rotary system, such as Fig. 1 institutes
Show, mainly by buffering valve rod 1, pole socket 2, coupling sleeve 3, the first spring 4, spring base 5, second spring 6, poppet valve core 7, ball valve core
8, the compositions such as valve core case 9.The right end of pole socket 2 is set in the left end of coupling sleeve 3 and seals against each other connection, pole socket 2 by rubber ring
It is equipped with valve body with the outside of 3 junction of coupling sleeve, buffering valve rod 1 is equipped in pole socket 2, the right end of buffering valve rod 1 is set to spring base 5
Left end in and be connected with each other, the outside of spring base 5 is equipped with the first spring 4, and the both ends of the first spring 4 are separately connected spring base 5
The projection portion and the projection portion among buffering valve rod 1, the right end of spring base 5 of right end are connect with the left end of poppet valve core 7, cone valve
The left end of core 7 is set in the right end of spring base 5, and the right end of poppet valve core 7 matches with the valve core case 9 on the right side of it, the right side of poppet valve core 7
End is the conical surface, and the outside of poppet valve core 7 is equipped with ball valve core 8, there are one the outside of coupling sleeve 3 is set between ball valve core 8 and valve body
Second spring 6 for 8 openings of sizes of control ball spool.
Multiple throttle orifices are equipped on poppet valve core 7 and buffering valve rod 1, are acted in throttle orifice, annular damper and the first spring 4
Under play a cushioning effect；Buffering valve rod 1 is axially movable, and increases the compressing force of the first spring 4, plays secondary buffer work
With.According to system back pressure pressure, repairing function is realized by the smaller second spring 6 of ball valve core 8 and a rigidity.
Poppet valve core 7 is throttled by its conical surface seal by throttle orifice thereon, and valve core case 9 and poppet valve core 7 have annular
Gap throttles.Buffering valve rod 1 is set there are two throttle orifice, and buffers the pole socket 2 that valve rod 1 coordinates with it and equally have annular gap section
Stream.
Original state, under the spring-force driven dual of the first spring 4, the conical surface and the valve core case 9 of poppet valve core 7 seal, poppet valve core 7
Left end be packed into 5 endoporus of spring base, be formed simultaneously ring-shaped throttling damping；It buffers 1 right end of valve rod and is equipped with throttle orifice, while and spring
5 inner holes of seat form ring-shaped throttling damping, 2 clearance fit of left end and pole socket；According to system back pressure pressure, ball valve core 8 is opened
Mouth size is controlled by the smaller second spring 6 of a rigidity.
As shown in Figure 1 and Figure 2, when rotary motor normally rotates, ball valve core 8 is in oil pressure and the spring force of second spring 6
Effect is lower to close, and plays the role of one-way sealing.And when braking, motor is in pump condition, and the back pressure of oil return system overcomes the second bullet
The spring force of spring 6, ball valve core 8 are opened, and repairing is played the role of.
When excavator, which turns round, to be started, system is flown up, and fluid enters the buffering of buffering valve rod 1 by damping hole hole
Chamber, due to multiple damping throttlings such as poppet valve core 7, buffering valve rod 1, the pressure rising gradient inside overflow valve is small, and poppet valve core 7 is beaten
It opens, plays first time cushioning effect.When the pressure of cushion chamber continues to rise, poppet valve core 7 is in the first spring 4 and buffer cavity pressure
Effect is lower to close.
When system pressure continue increase when, poppet valve core 7 is again turned on, simultaneous buffering valve rod 1 under the action of compensator or trimmer pressure,
The first spring 4 is compressed, allows buffering valve rod 1 and 4 entirety of the first spring to move right so that the pressure of working connection is gradually increasing, and is prolonged
The gradient that slow system pressure rises, plays the role of secondary buffer.
As shown in figure 3, the 6T excavators using the novel and multifunctional rotary motor overflow valve mounted in mainstream in the market turn round
Systematic schematic diagram can not only realize that secondary buffer, repairing are anti-and be emptied function, also reduce the purchase cost of main engine plants, and the valve
Delicate structure, it is easy for installation.
The rotary motor equipped with multi-functional overflow valve is passed through into testing stand respectively below and excavator is tested.Test procedure is such as
Under：
The first step：Rotary motor with multi-functional overflow valve is mounted on testing stand, and tests correlation performance parameters；
Second step：Again by it on the 6T excavator rotary systems, system pressure when test starting, braking；
Third walks：The ball valve core 8 of multi-functional overflow valve is opened when test braking, the pressure and flow of repairing；
4th step：Noise when rotary braking is measured with special instrument, if having abnormal sound；
5th step：The industry that rotary motor with multi-functional overflow valve is carried out 2000 hours on 6T excavators tries
It tests.
It being proved by testing stand and overall test, the rotary motor with multi-functional overflow valve can realize pressure buffer,
Delay system pressure rising gradient, reduces impact, and repairing can be played the role of when rotary motor is braked, prevent from being emptied abnormal sound.
The application of the Multifunctional rotating motor overflow valve can substitute traditional check valve and overflow valve design, reduce braking cost,
With certain economic benefit.
Claims (5)
1. a kind of Multifunctional rotating motor overflow valve, which is characterized in that including pole socket (2), the left end of pole socket (2) is equipped with sealing
The right end of lid, pole socket (2) is set in the left end of coupling sleeve (3) and is connected with each other, and pole socket (2) is outer with coupling sleeve (3) junction
Side is equipped with valve body, and buffering valve rod (1) is equipped in pole socket (2), and the right end of buffering valve rod (1) is set in the left end of spring base (5) simultaneously
It is connected with each other, the outside of spring base (5) is equipped with the first spring (4), and the both ends of the first spring (4) are separately connected spring base (5) right side
End and buffering valve rod (1), the right end of spring base (5) are connect with the left end of poppet valve core (7), and the left end of poppet valve core (7) is set to spring
In the right end of seat (5), the right end of poppet valve core (7) matches with the valve core case (9) on the right side of it, and the outside of poppet valve core (7) is equipped with ball
Spool (8), the outside of coupling sleeve (3) are located at ball valve core (8) and set that there are one big for control ball spool (8) opening between valve body
Small second spring (6).
2. a kind of Multifunctional rotating motor overflow valve as described in claim 1, which is characterized in that the poppet valve core (7) and
It is equipped with multiple throttle orifices on buffering valve rod (1).
3. a kind of Multifunctional rotating motor overflow valve as claimed in claim 2, which is characterized in that the valve core case (9) and
Poppet valve core (7) has annular gap throttling, the pole socket (2) that buffering valve rod (1) coordinates with it to have annular gap throttling.
4. a kind of Multifunctional rotating motor overflow valve as described in claim 1, which is characterized in that the poppet valve core (7)
Right end is the conical surface.
5. a kind of Multifunctional rotating motor overflow valve as claimed in claim 4, which is characterized in that the poppet valve core (7)
The conical surface is sealed with valve core case (9), and the left end of poppet valve core (7) is set in the endoporus of spring base (5), forms ring-shaped throttling damping；It is slow
It rushes valve rod (1) right end and is equipped with throttle orifice, buffer the inner hole of valve rod (1) right end and spring base (5), form torus knot flow resistance
Buddhist nun buffers valve rod (1) left end and pole socket (2) clearance fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810518879.7A CN108547815A (en) | 2018-05-25 | 2018-05-25 | Multifunctional rotating motor overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810518879.7A CN108547815A (en) | 2018-05-25 | 2018-05-25 | Multifunctional rotating motor overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108547815A true CN108547815A (en) | 2018-09-18 |
Family
ID=63511232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810518879.7A Withdrawn CN108547815A (en) | 2018-05-25 | 2018-05-25 | Multifunctional rotating motor overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108547815A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202958A (en) * | 2020-01-31 | 2021-08-03 | 株式会社日本碧士克 | Pressure regulating valve |
| CN114810710A (en) * | 2022-04-29 | 2022-07-29 | 青岛力克川液压机械有限公司 | Multifunctional cartridge valve for rotary motor and use method thereof |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4112868A1 (en) * | 1991-04-19 | 1992-10-22 | Zahnradfabrik Friedrichshafen | Displacement pump with control valve - has valve cone with collar which creates restrictor and pressure area |
| CN2486755Y (en) * | 2001-07-05 | 2002-04-17 | 焦集群 | Two-way pressure fixing valve for hydraulic oil pipe or rod clamp |
| CN2697420Y (en) * | 2004-04-21 | 2005-05-04 | 华中科技大学 | Pre-guiding type water pressure overflow valve |
| CN201086607Y (en) * | 2007-08-30 | 2008-07-16 | 无锡华创伊卡露斯车辆设备有限公司 | Hydraulic control body in articulated system of large articulated passenger car |
| CN201103138Y (en) * | 2007-09-18 | 2008-08-20 | 山东山工机械有限公司 | Combined oil-supplementing overload valve for loading machine work distribution valve |
| CN201748005U (en) * | 2010-06-25 | 2011-02-16 | 徐州徐工挖掘机械有限公司 | Sectional overflow valve |
| CN202182080U (en) * | 2011-08-15 | 2012-04-04 | 宁波广天赛克思液压有限公司 | Overflow valve with secondary buffering function for hydraulic pump |
| CN102444733A (en) * | 2011-12-14 | 2012-05-09 | 四川省机械研究设计院 | Self-buffering multistage safety valve |
| CN102777438A (en) * | 2012-08-17 | 2012-11-14 | 邓开忠 | Multifunctional integrated valve bank of hydraulic motor |
| CN202646215U (en) * | 2012-06-07 | 2013-01-02 | 龙工（上海）桥箱有限公司 | Fixture for control valve for regulating flow of plunger pump |
| CN203009428U (en) * | 2012-11-27 | 2013-06-19 | 龙工（上海）桥箱有限公司 | Overflow valve for motor of excavator |
| CN203023554U (en) * | 2012-11-19 | 2013-06-26 | 安徽金达利液压有限公司 | Multipurpose one-way overflow valve |
| CN105134681A (en) * | 2015-10-08 | 2015-12-09 | 杭州力龙液压有限公司 | One-way cushion overflow valve and closed-type hydraulic pump |
| US20160245414A1 (en) * | 2015-02-25 | 2016-08-25 | Purity (Xiamen) Sanitary Ware Co., Ltd. | Anti-siphon one-way valve |
| CN206320117U (en) * | 2016-12-29 | 2017-07-11 | 赛克思液压科技股份有限公司 | A kind of adjustable-pressure level 2 buffering overflow valve |
| CN106969000A (en) * | 2017-05-12 | 2017-07-21 | 大连海事大学 | A kind of hydraulic buffer valve for engineering vehicle shift control device |
| JP2017133643A (en) * | 2016-01-29 | 2017-08-03 | 株式会社不二越 | Relief valve |
| CN208534880U (en) * | 2018-05-25 | 2019-02-22 | 龙工（上海）精工液压有限公司 | A kind of Multifunctional rotating motor overflow valve |
-
2018
- 2018-05-25 CN CN201810518879.7A patent/CN108547815A/en not_active Withdrawn
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4112868A1 (en) * | 1991-04-19 | 1992-10-22 | Zahnradfabrik Friedrichshafen | Displacement pump with control valve - has valve cone with collar which creates restrictor and pressure area |
| CN2486755Y (en) * | 2001-07-05 | 2002-04-17 | 焦集群 | Two-way pressure fixing valve for hydraulic oil pipe or rod clamp |
| CN2697420Y (en) * | 2004-04-21 | 2005-05-04 | 华中科技大学 | Pre-guiding type water pressure overflow valve |
| CN201086607Y (en) * | 2007-08-30 | 2008-07-16 | 无锡华创伊卡露斯车辆设备有限公司 | Hydraulic control body in articulated system of large articulated passenger car |
| CN201103138Y (en) * | 2007-09-18 | 2008-08-20 | 山东山工机械有限公司 | Combined oil-supplementing overload valve for loading machine work distribution valve |
| CN201748005U (en) * | 2010-06-25 | 2011-02-16 | 徐州徐工挖掘机械有限公司 | Sectional overflow valve |
| CN202182080U (en) * | 2011-08-15 | 2012-04-04 | 宁波广天赛克思液压有限公司 | Overflow valve with secondary buffering function for hydraulic pump |
| CN102444733A (en) * | 2011-12-14 | 2012-05-09 | 四川省机械研究设计院 | Self-buffering multistage safety valve |
| CN202646215U (en) * | 2012-06-07 | 2013-01-02 | 龙工（上海）桥箱有限公司 | Fixture for control valve for regulating flow of plunger pump |
| CN102777438A (en) * | 2012-08-17 | 2012-11-14 | 邓开忠 | Multifunctional integrated valve bank of hydraulic motor |
| CN203023554U (en) * | 2012-11-19 | 2013-06-26 | 安徽金达利液压有限公司 | Multipurpose one-way overflow valve |
| CN203009428U (en) * | 2012-11-27 | 2013-06-19 | 龙工（上海）桥箱有限公司 | Overflow valve for motor of excavator |
| US20160245414A1 (en) * | 2015-02-25 | 2016-08-25 | Purity (Xiamen) Sanitary Ware Co., Ltd. | Anti-siphon one-way valve |
| CN105134681A (en) * | 2015-10-08 | 2015-12-09 | 杭州力龙液压有限公司 | One-way cushion overflow valve and closed-type hydraulic pump |
| JP2017133643A (en) * | 2016-01-29 | 2017-08-03 | 株式会社不二越 | Relief valve |
| CN206320117U (en) * | 2016-12-29 | 2017-07-11 | 赛克思液压科技股份有限公司 | A kind of adjustable-pressure level 2 buffering overflow valve |
| CN106969000A (en) * | 2017-05-12 | 2017-07-21 | 大连海事大学 | A kind of hydraulic buffer valve for engineering vehicle shift control device |
| CN208534880U (en) * | 2018-05-25 | 2019-02-22 | 龙工（上海）精工液压有限公司 | A kind of Multifunctional rotating motor overflow valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202958A (en) * | 2020-01-31 | 2021-08-03 | 株式会社日本碧士克 | Pressure regulating valve |
| CN114810710A (en) * | 2022-04-29 | 2022-07-29 | 青岛力克川液压机械有限公司 | Multifunctional cartridge valve for rotary motor and use method thereof |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180918 |
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| WW01 | Invention patent application withdrawn after publication |