CN203809397U - Slide valve type reversing valve - Google Patents
Slide valve type reversing valve Download PDFInfo
- Publication number
- CN203809397U CN203809397U CN201420202645.9U CN201420202645U CN203809397U CN 203809397 U CN203809397 U CN 203809397U CN 201420202645 U CN201420202645 U CN 201420202645U CN 203809397 U CN203809397 U CN 203809397U
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- Prior art keywords
- valve
- spool
- valve body
- grooves
- groove
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Abstract
The utility model relates to a slide valve type reversing valve. The slide valve type reversing valve comprises a valve body, a valve body hole and a sliding valve element which can make axial movement in the valve body hole. Annular undercutting grooves are formed in the valve body hole, a plurality of annular grooves are formed in the valve element as well, and circular beads between the annular grooves of the valve element cover the undercutting grooves. The annular grooves between the valve element and the circular beads are arc-shaped grooves, and the annular grooves between the adjacent circular beads are trapezoidal grooves. A conical face is arranged at the front end of the valve element, and a semicircular groove is formed in the middle position of the valve element. According to the slide valve type reversing valve, the annular grooves are arranged to be the arc-shaped grooves and the trapezoidal grooves, so that the flow condition of liquid is changed, vortexes and pressure waves are avoided, fluid noise is lowered, the usability of the valve is improved, and the service life of the valve is prolonged.
Description
Technical field
The utility model belongs to field of hydraulic control, relates to a kind of selector valve, relates in particular to a kind of spool that utilizes with respect to the relative sliding of valve body, realizes the spool-type valves of oil circuit break-make or flow direction change.
Background technique
Hydraulic control valve is the control unit in hydraulic system, and its function is to control the flow direction, pressure and the flow of liquid in hydraulic system, so that the operation mechanism of hydraulic actuator and driving thereof obtains needed moving direction, movement velocity and thrust etc.
In sliding valve style, rotary valve and ball-valve type selector valve, spool-type valves is most widely used in hydraulic system, it is to utilize spool with respect to the relative sliding of valve body, realizes oil circuit break-make or flow direction change, thus realize hydraulic actuator startup, stop or the conversion of moving direction.
At present, when selector valve commutates fast, the pressure of oil circuit can sharply rise, to such an extent as to produces percussive pressure noise; If suddenly commutation makes acceleration a that executive component produces when large (a > > 0.3g), can produce percussive pressure vibration noise.In order to reduce percussive pressure noise, common measure has: 1, on changeover valve core, be provided with the conical surface or triangle throttling groove, make the flow area of valve port gradual; 2, select as much as possible the selector valve of DC electromagnet; 3, adopt electro-hydraulic proportion reversing valve, and delay main valve turn around time by damping adjusting device, or pilot control pressure is adjusted to the main valve plug needed minimum pressure that commutates; 4, on oil hydraulic cylinder, be provided with buffer structure, to relax impact force.Percussive pressure noise during above-mentioned said several reduction selector valve work, still needs further to be improved.
Model utility content
The utility model, in order to overcome deficiency of the prior art, provides a kind of spool-type valves, and this valve can reduce the noise producing due to hydraulic shock effectively.
The utility model is to be achieved through the following technical solutions:
A spool-type valves, comprise valve body, valve body hole, can be in valve body hole axially movable sliding valve core, in described valve body hole, be provided with annular undercut groove, it is characterized in that:
On described spool, be provided with equally several circular grooves, the shoulder between spool circular groove hides undercut groove;
Circular groove between described spool and shoulder is curve bath, and the circular groove between described adjacent shoulder is dovetail groove.
As optimal technical scheme of the present utility model, the front end of described spool is the conical surface, neutral position at spool offers semi-circular groove, in the comprehensive conical surface in spool place and semi-circular groove, can make the flow area of valve port gradual, while preventing from commutating fast due to selector valve, oil circuit pressure sharply rises, and produces hydraulic shock noise.
As optimal technical scheme of the present utility model, described undercut groove communicates with the main hydraulic fluid port on valve body bottom surface.
As optimal technical scheme of the present utility model, the aperture of described main hydraulic fluid port is all identical.
Compared with prior art, the beneficial effects of the utility model are: the utility model, by circular groove being arranged to curve bath and dovetail groove, to change the flowing state of liquid, avoids producing whirlpool and pressure wave, reduce the noise of fluid, improve usability and the working life of valve.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1-valve body; 2-sliding valve core; 3-undercut groove; 4-shoulder; The 5-conical surface; 6-semi-circular groove; 7-curve bath; 8-dovetail groove; 10-valve body hole.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, Fig. 1 is structural representation of the present utility model.
Described a kind of spool-type valves, comprise the valve body 1 made by spheroidal graphite cast iron, valve body hole 10, can be at the interior axially movable sliding valve core 2 of valve body hole 10, sliding valve core 2 adopts high alloy-structural steel, make it have good wear resistance, linear expansion coefficient and amount of deformation little, in order to improve the intensity of spool, must make the surface of material reach certain hardness (General Requirements is greater than 58HRC).The utility model when implementing, in assurance work by the sealing of oil sealing mouth, sliding valve core 2 should be as far as possible little with the radial fit gap of valve body hole 10.In described valve body hole 10, be provided with annular undercut groove 3, on described spool 2, be provided with equally several circular grooves, the shoulder 4 between spool 2 circular grooves hides undercut groove 3; During oil sealing, spool land 4 not only hides undercut groove 3, also the valve body hole of undercut groove 3 sides 10 is hidden to a segment length, when shoulder 4 does not hide undercut groove 3, this oil circuit just can communicate with other oil circuits, and now, between shoulder 4 and undercut groove 3, the axial length of opening is called opening length.Described undercut groove 3 communicates with the main hydraulic fluid port (P, A, B, T) on valve body 1 bottom surface, the aperture of described main hydraulic fluid port (P, A, B, T) is all identical, and the number of undercut groove 3 and the number of shoulder 4 and the function of valve, performance, volume and technique have direct relation.
Circular groove between described spool 2 and shoulder 4 is curve bath 7, and the circular groove between described adjacent shoulder 4 is dovetail groove 8.By circular groove being arranged to curve bath 7 and dovetail groove 8, to change the flowing state of liquid, avoid producing whirlpool and pressure wave, reduce the noise of fluid, improve usability and the working life of valve.This selector valve adopts cylindrical spool simultaneously, is conducive to, by axial and balanced radial force suffered on spool, reduce the driving force of spool, because spool is straight-line, so it is particularly suitable for electromagnet, handles driving.
The front end of described spool 2 is the conical surface 5, in the neutral position of spool 2, offers semi-circular groove 6, in the comprehensive conical surface in spool place and semi-circular groove, can make the flow area of valve port gradual, while preventing from commutating fast due to selector valve, oil circuit pressure sharply rises, and produces hydraulic shock noise.
The utility model the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (4)
1. a spool-type valves, comprise valve body (1), valve body hole (10), can be in valve body hole (10) axially movable sliding valve core (2), in described valve body hole (10), be provided with annular undercut groove (3), it is characterized in that:
Described spool is provided with several circular grooves on (2) equally, and the shoulder (4) between spool (2) circular groove hides undercut groove (3);
Circular groove between described spool (2) and shoulder (4) is curve bath (7), and the circular groove between described adjacent shoulder (4) is dovetail groove (8).
2. spool-type valves according to claim 1, is characterized in that: the front end of described spool (2) is the conical surface (5), in the neutral position of spool (2), offers semi-circular groove (6).
3. spool-type valves according to claim 2, is characterized in that: described undercut groove (3) communicates with the main hydraulic fluid port (P, A, B, T) on valve body (1) bottom surface.
4. spool-type valves according to claim 3, is characterized in that: the aperture of described main hydraulic fluid port (P, A, B, T) is all identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420202645.9U CN203809397U (en) | 2014-04-20 | 2014-04-20 | Slide valve type reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420202645.9U CN203809397U (en) | 2014-04-20 | 2014-04-20 | Slide valve type reversing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203809397U true CN203809397U (en) | 2014-09-03 |
Family
ID=51448154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420202645.9U Expired - Fee Related CN203809397U (en) | 2014-04-20 | 2014-04-20 | Slide valve type reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203809397U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626885A (en) * | 2014-10-31 | 2016-06-01 | 北京精密机电控制设备研究所 | Slide valve capable of effectively reducing flow force |
| CN105757024A (en) * | 2016-04-06 | 2016-07-13 | 兰州理工大学 | Hydraulic slide valve |
| CN112747137A (en) * | 2021-01-08 | 2021-05-04 | 涌镇液压机械（上海）有限公司 | Valve core structure for improving through flow |
-
2014
- 2014-04-20 CN CN201420202645.9U patent/CN203809397U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626885A (en) * | 2014-10-31 | 2016-06-01 | 北京精密机电控制设备研究所 | Slide valve capable of effectively reducing flow force |
| CN105757024A (en) * | 2016-04-06 | 2016-07-13 | 兰州理工大学 | Hydraulic slide valve |
| CN105757024B (en) * | 2016-04-06 | 2017-06-06 | 兰州理工大学 | A kind of hydraulic efficiency slide valve |
| CN112747137A (en) * | 2021-01-08 | 2021-05-04 | 涌镇液压机械（上海）有限公司 | Valve core structure for improving through flow |
| CN112747137B (en) * | 2021-01-08 | 2024-05-31 | 涌镇液压机械（上海）有限公司 | Valve core structure for improving passing flow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20150420 |
|
| EXPY | Termination of patent right or utility model |