CN204113790U - Relief valve - Google Patents
Relief valve Download PDFInfo
- Publication number
- CN204113790U CN204113790U CN201420504690.XU CN201420504690U CN204113790U CN 204113790 U CN204113790 U CN 204113790U CN 201420504690 U CN201420504690 U CN 201420504690U CN 204113790 U CN204113790 U CN 204113790U
- Authority
- CN
- China
- Prior art keywords
- valve seat
- spool
- valve
- relief valve
- tapered portion
- 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.)
- Expired - Lifetime
Links
- 239000000945 filler Substances 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 238000013016 damping Methods 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 37
- 239000010720 hydraulic oil Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Safety Valves (AREA)
Abstract
Relief valve, belong to fluid pressure actuator, establish the valve seat of oil pocket in comprising, be arranged at valve seat inner and the spool be slidably matched with valve seat and the pressure regulating screw be connected with valve base sealing, described spool is provided with tapered portion, described tapered portion and valve base inner wall touch thus the oil pocket in valve seat are divided into oil suction chamber and go out oil pocket, described oil suction chamber is communicated with filler opening, described go out oil pocket be communicated with oil outlet, the bottom of described tapered portion is provided with the jet sheet be slidably matched with valve seat, and the bottom of described spool has contacted outer pressure adjusting spring.This relief valve only have employed a spool, there is no being slidably matched of the guide's valve seat in conventional outflow valve and main valve plug and being slidably matched of main valve plug and damping spool, so this relief valve is relative to traditional relief valve, dirt is not easy to pile up, and the probability blocked by dirt is very low.
Description
Technical field
The utility model belongs to fluid pressure actuator, is particularly related to relief valve.
Background technique
Relief valve is a kind of hydraulic pressure control valve, in hydraulic equipment, mainly play level pressure overflow effect, voltage stabilizing, system unloaded and safety protection effect.During system worked well, valve closing.Open overflow when only having load to exceed the limit of regulation, carry out overload protection, system pressure is no longer increased.
Traditional relief valve; as shown in Figure 1; during work, relief valve entrance is connected with high-pressure working chamber, and relief valve outlet is connected with oil sump tank; when active chamber pressure exceedes certain value; pilot valve B is moved to the left and opens, and thus main valve plug C inside and outside generation pressure difference is moved to the left opens, relief valve entrance and outlet; high pressure oil is directly back to oil sump tank, plays a protective role to hydraulic system.Because guide's valve seat A and main valve plug C is slidably matched, main valve plug C and damping spool D is slidably matched, all glade plane space is there is between them, after oil circuit circulation certain hour, dirt is easily here piled up, thus the cooperation destroyed between them, cause the stuck state of relief valve, and then do not reach the functional effect of relief valve.
Another kind of traditional relief valve, as shown in Figure 2, the relief valve in working principle and Fig. 1 is similar.Because main valve plug C and main valve seat E is slidably matched, dirt is piled up herein, thus destroys the cooperation between them, causes the stuck state of relief valve.In addition, F is elongated for spool entrance, and accumulation of mud easily causes spool entrance F to block at spool entrance F, affects the normal work of relief valve.
Model utility content
The purpose of this utility model is to overcome the above-mentioned defect mentioned and deficiency, and provides relief valve.
The technological scheme that the utility model realizes the employing of its object is as follows.
Relief valve, establish the valve seat of oil pocket in comprising, be arranged at valve seat inner and the spool be slidably matched with valve seat and the pressure regulating screw be connected with valve base sealing, described spool is provided with tapered portion, described tapered portion and valve base inner wall touch thus the oil pocket in valve seat are divided into oil suction chamber and go out oil pocket, described oil suction chamber is communicated with filler opening, described go out oil pocket be communicated with oil outlet, the bottom of described tapered portion is provided with the jet sheet be slidably matched with valve seat, and the bottom of described spool has contacted outer pressure adjusting spring.
Described spool also comprises thin bar and thick bar; One end of described thin bar connects thick bar, and the other end is connected to the top of tapered portion; Described thin bar is disposed adjacent with filler opening; Described thick bar and valve seat are slidably matched.
The exterior edge face of described jet sheet is provided with a ring groove, and described groove annular diameters is not more than the end circular diameter of tapered portion.
The inside concentric of described outer pressure adjusting spring is provided with internal pressure-regulating spring; One end of described outer pressure adjusting spring and internal pressure-regulating spring all contacts bottom spool, and the other end all contacts pressure regulating screw.
The outer end locking nut of described pressure regulating screw is fixed, and the inner is threaded with valve seat, and middle part is arranged with an O shape circle.
Described valve seat outer cover is provided with the 2nd O shape circle and the 3rd O shape circle; Described 2nd O shape circle is between locking nut and oil outlet; Described 3rd O shape circle is between oil outlet and filler opening.
Glade plane space size between described valve seat and spool is 0.15 ~ 0.35mm.
Glade plane space size between described valve seat and spool is 0.2mm.
This relief valve only have employed a spool, there is no being slidably matched of the guide's valve seat in conventional outflow valve and main valve plug and being slidably matched of main valve plug and damping spool, so this relief valve is relative to traditional relief valve, dirt is not easy to pile up, and the probability blocked by dirt is very low.
Accompanying drawing explanation
Fig. 1 is the structural representation of conventional outflow valve;
Fig. 2 is the structural representation of another kind of conventional outflow valve;
Fig. 3 is structural representation of the present utility model;
In figure: A-guide's valve seat, B-pilot valve, C-main valve plug, D-damping spool, E-main valve seat, 1-pressure regulating screw, 2-locking nut, 3-the one O shape circle, 4-valve seat, 4a-oil outlet, 4b-go out oil pocket, 4c-oil suction chamber, 4d-filler opening, 5-internal pressure-regulating spring, the outer pressure adjusting spring of 6-, 7-the 2nd O shape circle, 8-the 3rd O shape circle, 9-spool, 9a-thick bar, 9b-thin bar, 9c-tapered portion, 9d-jet sheet.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Relief valve, establishes the valve seat 4 of oil pocket, is arranged at valve seat 4 inner and the spool 9 be slidably matched with valve seat 4 and the pressure regulating screw 1 be tightly connected with valve seat 4 in comprising.Described spool 9 is provided with tapered portion 9c, and described tapered portion 9c and valve seat 4 inwall touch thus the oil pocket in valve seat 4 are divided into oil suction chamber 4c and go out oil pocket 4b.Described oil suction chamber 4c is communicated with filler opening 4d, described in go out oil pocket 4b and be communicated with oil outlet 4a.The bottom of described tapered portion 9c is provided with the jet sheet 9d be slidably matched with valve seat 4, and the bottom of described spool 9 has contacted outer pressure adjusting spring 6.
When relief valve is in position of rest, under the action of the spring, tapered portion 9c contacts valve seat 4, oil suction chamber 4c and to go out oil pocket 4b obstructed.Now oil hydraulic pump output flow all flows into work system.
When filler opening 4d place oil pressure is greater than spring to the pressure that spool 9 produces, move in spool 9, oil suction chamber 4c with go out oil pocket 4b and be communicated with, relief valve is opened.Now oil hydraulic pump output flow part flow to oil sump tank by oil outlet 4a.By relief valve to system unloaded, system pressure no longer raises.
Glade plane space size between described valve seat 4 and spool 9 is 0.15 ~ 0.35mm, and as preferably, the glade plane space size between described valve seat 4 and spool 9 is 0.2mm.This relief valve only have employed a spool, and valve seat 4 is comparatively large with the glade plane space of spool 9, and dirt is not easy to pile up, and the probability blocked by dirt is very low.
Described spool 9 also comprises thin bar 9b and thick bar 9a.One end of described thin bar 9b connects thick bar 9a, and the other end is connected to the top of tapered portion 9c.Described thin bar 9b is disposed adjacent with filler opening 4d.Described tapered portion 9c, thin bar 9b, thick bar 9a and valve seat 4 is enclosed to form oil suction chamber 4c.Described thick bar 9a and valve seat 4 are slidably matched.Thick bar 9a plays the effect of a similar piston, ensure that the mobile route of spool 9.
The exterior edge face of described jet sheet 9d is provided with a ring groove, described groove annular diameters is not more than the end circular diameter of tapered portion 9c, namely groove annular diameters is equal to or slightly less than the end circular diameter of tapered portion 9c, ensure that hydraulic oil that the side along tapered portion 9c is penetrated can enter the groove of jet sheet 9d.When spool 9 is toward when moving left, the flow velocity of the hydraulic oil penetrated from the gap of tapered portion 9c and valve seat 4 is very high, and hydraulic oil, through the groove of special shape, changes original jet direction and flow velocity.Under the effect of hydraulic oil, jet sheet 9d has moved to left distance S, and according to law of conservation of energy, the kinetic energy of hydraulic oil is converted to the potential energy of spring.Such structural design, make when filler opening 4d oil pressure is constant, what increase spool 9 opens stroke, adds the through-current capability of relief valve.
The inside concentric of described outer pressure adjusting spring 6 is provided with internal pressure-regulating spring 5; One end of described outer pressure adjusting spring 6 and internal pressure-regulating spring 5 all contacts bottom spool 9, and the other end all contacts pressure regulating screw 1.The design of dual spring is to strengthen pressure, meets the dynamics requirement withstanding spool 9.
The outer end locking nut 2 of described pressure regulating screw 1 is fixed, and the inner is threaded with valve seat 4, and middle part is arranged with an O shape circle 3.A described O shape circle 3 is arranged between pressure regulating screw 1 and valve seat 4, plays seal action.
Described valve seat 4 outer cover is provided with the 2nd O shape circle 7 and the 3rd O shape circle 8.Described 2nd O shape circle 7 is between locking nut 2 and oil outlet 4a.Described 3rd O shape circle 8, between oil outlet 4a and filler opening 4d, flow to oil outlet 4a in order to prevent hydraulic oil diameter from filler opening 4d.
The utility model is illustrated according to embodiment, and under the prerequisite not departing from present principles, this device can also make some distortion and improvement.It should be pointed out that and all drop on the technological scheme that all employings are equal to replacement or the mode such as equivalent transformation and obtain in protection domain of the present utility model.
Claims (8)
1. relief valve, it is characterized in that, the valve seat (4) of oil pocket is established in comprising, be arranged at the inner and spool (9) be slidably matched with valve seat (4) of valve seat (4), and the pressure regulating screw (1) to be tightly connected with valve seat (4), described spool (9) is provided with tapered portion (9c), described tapered portion (9c) and valve seat (4) inwall touch thus the oil pocket in valve seat (4) are divided into oil suction chamber (4c) and go out oil pocket (4b), described oil suction chamber (4c) is communicated with filler opening (4d), described go out oil pocket (4b) be communicated with oil outlet (4a), the bottom of described tapered portion (9c) is provided with the jet sheet (9d) be slidably matched with valve seat (4), the bottom of described spool (9) has contacted outer pressure adjusting spring (6).
2. relief valve as claimed in claim 1, it is characterized in that, described spool (9) also comprises thin bar (9b) and thick bar (9a); One end of described thin bar (9b) connects thick bar (9a), and the other end is connected to the top of tapered portion (9c); Described thin bar (9b) is disposed adjacent with filler opening (4d); Described thick bar (9a) and valve seat (4) are slidably matched.
3. relief valve as claimed in claim 1, it is characterized in that, the exterior edge face of described jet sheet (9d) is provided with a ring groove, and described groove annular diameters is not more than the end circular diameter of tapered portion (9c).
4. relief valve as claimed in claim 1, it is characterized in that, the inside concentric of described outer pressure adjusting spring (6) is provided with internal pressure-regulating spring (5); One end of described outer pressure adjusting spring (6) and internal pressure-regulating spring (5) all contacts spool (9) bottom, and the other end all contacts pressure regulating screw (1).
5. relief valve as claimed in claim 4, is characterized in that, the outer end locking nut (2) of described pressure regulating screw (1) is fixed, and the inner is threaded with valve seat (4), and middle part is arranged with O shape circle (3).
6. relief valve as claimed in claim 5, is characterized in that, described valve seat (4) outer cover is provided with the 2nd O shape circle (7) and the 3rd O shape circle (8); Described 2nd O shape circle (7) is positioned between locking nut (2) and oil outlet (4a); Described 3rd O shape circle (8) is positioned between oil outlet (4a) and filler opening (4d).
7. relief valve as claimed in claim 1, it is characterized in that, the glade plane space size between described valve seat (4) and spool (9) is 0.15 ~ 0.35mm.
8. the relief valve as described in claim 1 or 7, is characterized in that, the glade plane space size between described valve seat (4) and spool (9) is 0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420504690.XU CN204113790U (en) | 2014-09-03 | 2014-09-03 | Relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420504690.XU CN204113790U (en) | 2014-09-03 | 2014-09-03 | Relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204113790U true CN204113790U (en) | 2015-01-21 |
Family
ID=52331104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420504690.XU Expired - Lifetime CN204113790U (en) | 2014-09-03 | 2014-09-03 | Relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204113790U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523578A (en) * | 2016-12-16 | 2017-03-22 | 贵州红林机械有限公司 | Pilot type flow proportional solenoid valve for CDC shock absorber system |
| CN111102263A (en) * | 2020-01-22 | 2020-05-05 | 浙江高宇液压机电有限公司 | Pilot-operated overflow valve with unloading control channel |
-
2014
- 2014-09-03 CN CN201420504690.XU patent/CN204113790U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523578A (en) * | 2016-12-16 | 2017-03-22 | 贵州红林机械有限公司 | Pilot type flow proportional solenoid valve for CDC shock absorber system |
| CN111102263A (en) * | 2020-01-22 | 2020-05-05 | 浙江高宇液压机电有限公司 | Pilot-operated overflow valve with unloading control channel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150121 |