CN202182079U - Buffer type overflow valve used for hydraulic motor - Google Patents
Buffer type overflow valve used for hydraulic motor Download PDFInfo
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- CN202182079U CN202182079U CN2011202946039U CN201120294603U CN202182079U CN 202182079 U CN202182079 U CN 202182079U CN 2011202946039 U CN2011202946039 U CN 2011202946039U CN 201120294603 U CN201120294603 U CN 201120294603U CN 202182079 U CN202182079 U CN 202182079U
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Abstract
The utility model discloses a buffer type overflow valve used for a hydraulic motor. The buffer type overflow valve comprises a valve body, a valve seat, a valve housing and a screw plug which are assembled; the valve housing is provided with a valve core component; a buffer piston is mounted on the outer circumferential surface of the valve housing and at the position in a slide cavity of the valve body in a sliding manner; the buffer piston and the screw plug mounted at the left port of the valve body constitute a buffer cavity; the buffer cavity is communicated with an oil inlet of the valve body through a radial damping hole formed on the valve housing and an axial hole of the valve core component; and the buffer function of the overflow valve can be realized through pressure difference delay caused by the buffer piston moving rightwards. The valve has a compact structure, is simple to manufacture, and can remarkably improve hydraulic impact during starting and braking of a hydraulic rotary motor and improve the operation performance, thereby improving the service life of a hydraulic element of a system.
Description
Technical field
The utility model relates to machinery, technical field of hydraulic, particularly a kind of relief valve, specifically a kind of buffering type relief valve that is used for oil hydraulic motor.
Background technique
In the engineering machinery system, a lot of swirl gears is arranged when motion, because the rotary inertia of getting on the bus is big, when starting, braking or commutating suddenly, can cause very big hydraulic shock.When especially running into obstacle in the turning course and stopping suddenly, hydraulic shock is more obvious.The hydraulic shock meeting causes whole hydraulic system and element to produce vibration and noise, even destroys.In the existing technology; People generally adopt the rotary motor relief valve to limit the Maximum operating pressure of rotary system; But common relief valve is difficult to again to eliminate fully or absorption system starts or the hydraulic shock during braking; Thereby can't further improve the operating characteristics of system, can not protect the working life of hydraulic element better.
Summary of the invention
The utility model technical problem to be solved is to above-mentioned existing technology present situation; And provide have simple for structure, easy to install; Can be through buffer function absorption system pressure pulse; The fluctuation of elimination hydraulic pressure realizes starting, stopping a kind of stably buffering type relief valve that is used for oil hydraulic motor.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of buffering type relief valve that is used for oil hydraulic motor; Comprise equipped mutually valve body, valve seat, valve pocket and plug screw; Valve pocket is equipped with mangetic core assembly; The sliding chamber flip sleeve that is arranged in valve body on the valve pocket outer peripheral surface is equipped with damper piston, and damper piston is formed with buffer cavity with the plug screw that is installed in the valve body left port.
For optimizing technique scheme, the measure of taking also comprises:
Above-mentioned mangetic core assembly comprises spool, pressure spring and adjusting bolt; Spool and pressure spring are installed in the valve pocket; Regulate the rear port that bolt is arranged on valve pocket; The two ends of pressure spring respectively with spool with regulate bolt roof pressure mutually, regulate the pretension tension force that bolt can the adjustable diameter and screw adjusting pressure spring, the axial hole of the axial bore of mangetic core assembly for being shaped on along the spool axle center; , the radially damping hole that buffer cavity is shaped on through valve pocket and the axial bore of mangetic core assembly are connected with the filler opening of valve body.
Above-mentioned valve pocket is shaped on and connects fluid chamber, slide bar pilot hole and compression chamber successively; Spool is shaped on valve head and valve rod; Valve head is arranged in anterior fluid chamber, and the valve rod liquid sealing matches with the slip of slide bar pilot hole, and an end of valve rod extend in the compression chamber be fitted in compression chamber in pressure spring push up mutually and join; Radially damping hole is positioned at the back segment of valve pocket compression chamber, and fluid chamber is shaped on the oil outlet that is communicated with the valve body return opening.
Above-mentioned spool axial hole is shaped on first damping hole, and the import of spool axial hole is gradually little funneling taper hole.
Be shaped on boss face on the above-mentioned valve rod, boss face cutting ferrule apical grafting has pressure pad, and the front end of pressure spring pushes up with spool through pressure pad mutually joins.
Above-mentioned valve seat fixedly is fitted in the front end of valve pocket, and valve seat is shaped on the attachment hole that is communicated with valve body filler opening and spool axial hole, and the attachment hole expansion is shaped on the circular arc camber hole of matching with the sealing bulb sealing of valve head.
Above-mentioned plug screw fixing seal is installed in the left port of valve body, and plug screw is shaped on the pilot hole that contains internal thread, and the outside thread of regulating bolt is connected with the internal thread spiral of pilot hole and matches, and the reaming table top of the ear end face of valve pocket and pilot hole is apical grafting mutually.
Above-mentioned damper piston periphery wall matches with the sliding chamber inner circle wall slipper seal of valve body, and the sliding chamber of valve body right-hand member wall has the oil duct that is communicated with the valve body return opening.
Compared with prior art; The utility model increases on the basis of traditional relief valve and is provided with damper piston, and valve pocket and spool all be shaped on damping hole, and damper piston is sleeved on the valve pocket; Through moving to right and the throttling action of damping hole of damper piston; Utilize the pressure reduction of oil pressure that spool is opened, after moving to right of damper piston finished, utilize the balance of spool two ends oil pressure and the acting in conjunction of pressure spring to make spool be in closed condition.The size of the damping hole of the utility model can determine the size of fluid flow, and then can determine the time of buffering, through the project organization of buffering type, plays startup steadily, the effect of braking absorption pressure pulse.Protective system safety is improved the system operation performance.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the equipped preceding structural representation of the utility model and valve body;
Fig. 3 is the assembly structure figure of mangetic core assembly among Fig. 1;
Fig. 4 is the structural representation of valve pocket among Fig. 1.
Embodiment
Embodiment to the utility model describes in further detail below in conjunction with accompanying drawing.
Fig. 1 is extremely shown in Figure 4 to be the structural representation of the utility model.
Reference character wherein is: oil inlet P; Oil return inlet T; Valve body 1; Sliding chamber 11; Oil duct 12; Valve seat 2; Attachment hole 21; Valve pocket 3; Fluid chamber 3a; Slide bar pilot hole 3b; Compression chamber 3c; Radially damping hole 31; Oil outlet 32; Mangetic core assembly 4; Spool 41; Axial hole 41a; The first damping hole 41b; Taper hole 41c; Valve head 411; Valve rod 412; Boss face 412a; Sealing bulb 413; Pressure spring 42; Regulate bolt 43; Damper piston 5; Buffer cavity 5a; Pressure pad 6; Plug screw 7; Reaming table top 7a.
Extremely shown in Figure 4 like Fig. 1; A kind of buffering type relief valve that is used for oil hydraulic motor of the utility model; Comprise equipped mutually valve body 1, valve seat 2, valve pocket 3 and plug screw 7, valve pocket 3 is equipped with mangetic core assembly 4, and wherein: sliding chamber 11 flip sleeves that are arranged in valve body 1 on valve pocket 3 outer peripheral surfaces are equipped with damper piston 5; Damper piston 5 is formed with buffer cavity 5a with the plug screw 7 that is installed in valve body 1 left port; The radially damping hole 31 that buffer cavity 5a is shaped on through valve pocket 3 and the axial bore of mangetic core assembly 4 are connected with the oil inlet P of valve body 1, and the pressure reduction time-delay that damper piston 5 produces through moving to right realizes the pooling feature of relief valve.Compared with prior art the utility model is set with damper piston 5 on valve pocket 3; Rely on moving to right and the valve pocket throttling action of damping hole 31 radially of damper piston 5, realize the buffering of relief valve, reach and absorb the retardation pressure pulse; Elimination hydraulic pressure fluctuates, and improves the purpose of system operation performance.
Like Fig. 2, shown in Figure 3, the mangetic core assembly 4 of the utility model comprises spool 41, pressure spring 42 and regulates bolt 43; Spool 41 is installed in the valve pocket 3 with pressure spring 42; Regulate the rear port that bolt 43 is arranged on valve pocket 3; The two ends of pressure spring 42 respectively with spool 41 with regulate bolt 43 roof pressure mutually; Regulate the pretension tension force of bolt 43 ability adjustable diameter and screw adjusting pressure springs 42, the axial hole 41a of the axial bore of mangetic core assembly for being shaped on along spool 41 axle center.Regulate the rear end of bolt 43 roof pressures at pressure spring 42; Pressure spring 42 has determined the cracking pressure of spool 41, and in real work, people can be according to the requirement of system condition; Change the pressure set points of pressure spring 42 through regulating bolt 43, thereby determine the pressure range that spool is closed.
Like Fig. 2, Fig. 3, shown in Figure 4; The valve pocket 3 of the utility model is shaped on and connects fluid chamber 3a, slide bar pilot hole 3b and compression chamber 3c successively; Spool 41 is shaped on valve head 411 and valve rod 412; Valve head 411 is arranged in anterior fluid chamber 3a, and valve rod 412 liquid sealings match with slide bar pilot hole 3b slip, and an end of valve rod 412 extend among the compression chamber 3c be fitted in compression chamber 3c in pressure spring 42 push up mutually and join; Radially damping hole 31 is positioned at the back segment of valve pocket 3 compression chamber 3c, and fluid chamber 3a is shaped on the oil outlet 32 that is communicated with the valve body oil return inlet T.Valve rod 412 liquid sealings of the utility model match with slide bar pilot hole 3b, and fluid chamber 3a and compression chamber 3c are isolated into separate cavity.
The spool axial hole 41a of the utility model is shaped on the first damping hole 41b, and the import of spool axial hole 41a is gradually little funneling taper hole 41c.As shown in Figure 3, be shaped on boss face 412a on the valve rod 412, boss face 412a cutting ferrule apical grafting has pressure pad 6, and the front end of pressure spring 42 pushes up with spool 41 through pressure pad 6 mutually joins.
As shown in Figure 1; The outer circumferential face of the valve seat 2 of the utility model is equipped mutually with the sealing of the right-hand member mounting hole of valve body 1; Valve seat 2 fixedly is fitted in earlier the front end of valve pocket 3, is pressed into together in the valve body 1 with valve pocket 3 then, and valve seat 2 is fastenedly connected with valve pocket 3 and is integral; Valve seat 2 is shaped on the attachment hole 21 that is communicated with valve body oil inlet P and spool axial hole 41a, and attachment hole 21 expansions are shaped on the circular arc camber hole of matching with sealing bulb 413 sealings of valve head 411.The match oil circuit of control oil inlet P and oil return inlet T of valve seat 2 and spool 41 is connected break-make.
As shown in Figure 1, damper piston 5 periphery walls match with the sliding chamber 11 inner circle wall slipper seals of valve body, and the sliding chamber of valve body 11 right-hand member walls have the oil duct 12 that is communicated with the valve body oil return inlet T.
Position when being the utility model original state shown in Figure 1, the working principle of the utility model is:
The sealing bulb 413 of spool 41 is close to the circular arc camber hole of valve seat 2 under the effect of pressure spring 42 when original state, closes the passage of hydraulic oil from the oil inlet P to the oil return inlet T, and damper piston 5 is owing to be in the high order end in the sliding chamber 11 of valve body under the action of last time.Along with slewing directional control valve in the system is got back to meta, oil inlet P, the oil return inlet T of oil hydraulic motor are closed by rotary control valve.This moment, oil hydraulic motor can continue rotation owing to the effect of inertia of mechanism, and the oil hydraulic motor function converts pump into.The hydraulic pressure of relief valve oil inlet P begins to rise; Pressure oil through the taper hole 41c of spool 41, the first damping hole 41b, spool axial hole 41a, compression chamber 3c and radially damping hole 31 get into the left end buffer cavity 5a of damper pistons 5; Because the pressure of oil inlet P makes damper piston 5 move right greater than the pressure of oil return inlet T at this moment; In damper piston 5 moving process,, the damping function of the first damping hole 41b causes the pressure of the pressure of oil inlet P greater than compression chamber 3c and pressure spring 42 because making flowing liquid produce pressure reduction; The pressure that spool 41 overcomes pressure spring 42 is moved to the left; Lift off a seat 2 circular arc camber hole of sealing bulb 413 makes pressure oil flow to oil return inlet T from oil inlet P.When damper piston 5 moves to the sliding chamber of low order end and valve body 11 right-hand member walls mutually during apical grafting; Flow of fluid is static, and this moment, the hydraulic pressure of compression chamber 3c equated with the hydraulic pressure of oil inlet P, because the effect of pressure spring 42 pretightening forces; The pressure of carrying that makes spool 41 left ends is greater than right-hand member; Move right thereby promote spool 41, sealing bulb 413 cooperates with the circular arc camber hole sealing apical grafting of valve seat 2 once more, has closed the connecting passage of oil inlet P and oil return inlet T.The utility model also has an of short duration opening procedure when normal revolution, but has just closed at once.Start steadily the effect of absorption pressure pulse during braking thereby can play.
The great advantage of the utility model is, through the valve pocket increase structure of damper piston arranged, and the hydraulic shock when having improved startup and the braking of rotary motor significantly improve its operating characteristics, and it is simple in structure, and is easy to install.
The most preferred embodiment of the utility model is illustrated, and various variations of being made by those of ordinary skills or remodeling can not break away from the scope of the utility model.
Claims (8)
1. buffering type relief valve that is used for oil hydraulic motor; Comprise equipped mutually valve body (1), valve seat (2), valve pocket (3) and plug screw (7); Said valve pocket (3) is equipped with mangetic core assembly (4); It is characterized in that: sliding chamber (11) flip sleeve that is arranged in valve body (1) on described valve pocket (3) outer peripheral surface is equipped with damper piston (5), and damper piston (5) is formed with buffer cavity (5a) with the plug screw (7) that is installed in valve body (1) left port.
2. a kind of buffering type relief valve that is used for oil hydraulic motor according to claim 1 is characterized in that: described mangetic core assembly (4) comprises spool (41), pressure spring (42) and regulates bolt (43); Said spool (41) and pressure spring (42) are installed in the valve pocket (3); Regulate the rear port that bolt (43) is arranged on valve pocket (3); The two ends of said pressure spring (42) are respectively with spool (41) with regulate bolt (43) roof pressure mutually; Regulate the pretension tension force of bolt (43) ability adjustable diameter and screw adjusting pressure spring (42), the axial hole (41a) of the axial bore of said mangetic core assembly for being shaped on along spool (41) axle center; The radially damping hole (31) that said buffer cavity (5a) is shaped on through valve pocket (3) and the axial bore of mangetic core assembly (4) are connected with the filler opening of valve body.
3. a kind of buffering type relief valve that is used for oil hydraulic motor according to claim 2; It is characterized in that: described valve pocket (3) is shaped on and connects fluid chamber (3a), slide bar pilot hole (3b) and compression chamber (3c) successively; Said spool (41) is shaped on valve head (411) and valve rod (412); Valve head (411) is arranged in anterior fluid chamber (3a); Said valve rod (412) liquid sealing slides with slide bar pilot hole (3b) and matches; And an end of valve rod (412) extend in the compression chamber (3c) be fitted in compression chamber (3c) in pressure spring (42) push up mutually and join, said radially damping hole (31) is positioned at the back segment of valve pocket (3) compression chamber (3c), said fluid chamber (3a) is shaped on the oil outlet (32) that is communicated with valve body return opening (T).
4. a kind of buffering type relief valve that is used for oil hydraulic motor according to claim 3, it is characterized in that: described spool axial hole (41a) is shaped on first damping hole (41b), and the import of spool axial hole (41a) is gradually little funneling taper hole (41c).
5. a kind of buffering type relief valve that is used for oil hydraulic motor according to claim 4; It is characterized in that: be shaped on boss face (412a) on the described valve rod (412); Boss face (412a) cutting ferrule apical grafting has pressure pad (6), and the front end of said pressure spring (42) pushes up with spool (41) through pressure pad (6) mutually joins.
6. a kind of buffering type relief valve that is used for oil hydraulic motor according to claim 5; It is characterized in that: described valve seat (2) fixedly is fitted in the front end of valve pocket (3); Valve seat (2) is shaped on the attachment hole (21) that is communicated with valve body filler opening (P) and spool axial hole (41a), and attachment hole (21) expansion is shaped on the circular arc camber hole of matching with sealing bulb (413) sealing of valve head (411).
7. a kind of buffering type relief valve that is used for oil hydraulic motor according to claim 6; It is characterized in that: described plug screw (7) fixing seal is installed in the left port of valve body (1); And plug screw (7) is shaped on the pilot hole that contains internal thread; The outside thread of said adjusting bolt (43) is connected with the internal thread spiral of pilot hole and matches, and the reaming table top (7a) of the ear end face of said valve pocket (3) and pilot hole is apical grafting mutually.
8. a kind of buffering type relief valve that is used for oil hydraulic motor according to claim 7; It is characterized in that: described damper piston (5) periphery wall matches with sliding chamber (11) the inner circle wall slipper seal of valve body, and the sliding chamber (11) of valve body right-hand member wall has the oil duct (12) that is communicated with valve body return opening (T).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202946039U CN202182079U (en) | 2011-08-15 | 2011-08-15 | Buffer type overflow valve used for hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202946039U CN202182079U (en) | 2011-08-15 | 2011-08-15 | Buffer type overflow valve used for hydraulic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202182079U true CN202182079U (en) | 2012-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202946039U Expired - Fee Related CN202182079U (en) | 2011-08-15 | 2011-08-15 | Buffer type overflow valve used for hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202182079U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937121A (en) * | 2012-11-13 | 2013-02-20 | 上海中联重科桩工机械有限公司 | Pressure setting valve and engineering device |
| CN103899463A (en) * | 2014-03-28 | 2014-07-02 | 哈尔滨工程大学 | Multi-stage buffer type relief valve |
| CN104895860A (en) * | 2015-04-27 | 2015-09-09 | 徐工集团工程机械股份有限公司科技分公司 | Rotation buffering assembly of hydraulic backhoe loader |
| CN105570421A (en) * | 2016-01-13 | 2016-05-11 | 南通爱慕希机械股份有限公司 | Hydrostatic stepless speed change device |
| CN107559257A (en) * | 2017-09-11 | 2018-01-09 | 雷沃重工股份有限公司 | A kind of overflow valve |
| CN108061069A (en) * | 2017-12-19 | 2018-05-22 | 宁波文泽机电技术开发有限公司 | Buffer overflow valve |
| CN108781997A (en) * | 2018-05-30 | 2018-11-13 | 河南省绿色工程有限公司 | A kind of green plants support device |
-
2011
- 2011-08-15 CN CN2011202946039U patent/CN202182079U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937121A (en) * | 2012-11-13 | 2013-02-20 | 上海中联重科桩工机械有限公司 | Pressure setting valve and engineering device |
| CN102937121B (en) * | 2012-11-13 | 2015-03-11 | 上海中联重科桩工机械有限公司 | Pressure setting valve and engineering device |
| CN103899463A (en) * | 2014-03-28 | 2014-07-02 | 哈尔滨工程大学 | Multi-stage buffer type relief valve |
| CN103899463B (en) * | 2014-03-28 | 2016-05-04 | 哈尔滨工程大学 | Multi-stage buffer type overflow valve |
| CN104895860A (en) * | 2015-04-27 | 2015-09-09 | 徐工集团工程机械股份有限公司科技分公司 | Rotation buffering assembly of hydraulic backhoe loader |
| CN105570421A (en) * | 2016-01-13 | 2016-05-11 | 南通爱慕希机械股份有限公司 | Hydrostatic stepless speed change device |
| CN105570421B (en) * | 2016-01-13 | 2024-04-16 | 南通爱慕希机械股份有限公司 | Hydrostatic stepless speed change device |
| CN107559257A (en) * | 2017-09-11 | 2018-01-09 | 雷沃重工股份有限公司 | A kind of overflow valve |
| CN108061069A (en) * | 2017-12-19 | 2018-05-22 | 宁波文泽机电技术开发有限公司 | Buffer overflow valve |
| CN108781997A (en) * | 2018-05-30 | 2018-11-13 | 河南省绿色工程有限公司 | A kind of green plants support device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Patentee after: SAIKESI HYDRAULIC TECHNOLOGY CO., LTD. Address before: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Ningbo gontin sks Hydraulic Co. Ltd. Patentee before: Ningbo Wide Sky SKS Hydraulic Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120404 Termination date: 20160815 |