CN204476904U - A kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function - Google Patents
A kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function Download PDFInfo
- Publication number
- CN204476904U CN204476904U CN201520035982.8U CN201520035982U CN204476904U CN 204476904 U CN204476904 U CN 204476904U CN 201520035982 U CN201520035982 U CN 201520035982U CN 204476904 U CN204476904 U CN 204476904U
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- Prior art keywords
- annular groove
- damping
- relief valve
- noise reduction
- spool
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Abstract
A kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function, a flow-stopping plate is fixedly connected with near one end of oil back chamber at overflow spool, the end face of flow-stopping plate towards oil suction chamber side offers around the overflow spool baffle annular groove of a week, make the intersection point of the elongation line of overflow spool cone element and baffle annular groove end face be positioned at the medium position in whole annular groove face.The utility model sets up baffle annular groove, after being mapped to baffle annular groove with high speed by the fluid of valve port, baffle annular groove produces the impact force to spool, its direction is make valve port open large direction, contrary with its hydraulic power direction, inhibit hydraulic power on the impact of relief valve oil suction chamber pressure, improve regulation precision.The utility model also sets up damping hole, damping piston and damper regulation mechanism, damping piston and damping hole adopt small―gap suture to coordinate, and form damping cavity volume, can apply different dampings by damper regulation mechanism to overflow spool, alleviate the vibration of overflow spool, reach the effect of vibration and noise reducing.
Description
Technical field
The utility model relates to a kind of relief valve for vibration and noise reducing, specifically a kind of equilibrium liquid power and damping adjustable noise reduction relief valve.
Background technique
When oil suction chamber pressure oil promote relief valve spool, open overflow ducts time, liquid stream flows to oil back chamber from oil suction chamber by valve port, can form the active force to spool, i.e. hydraulic power.According to fluid mechanics principle, suffered by spool, the direction of hydraulic power is the direction that valve port is turned down, and from static properties, meets equilibrium equation below:
（1）
Wherein,
-spring pre-compression force;
-fluid acts on the area on spool;
-oil suction chamber pressure;
-hydraulic power
Therefore, the pressure of oil suction chamber can be drawn by formula (1)
（2）
As can be seen from formula (2), the flow stream pressure not only initial tension of spring of oil suction chamber
, liquid stream active area
relevant, go back and hydraulic power
relevant, and according to fluid mechanics principle, hydraulic power
be directly proportional, thus when relief valve initial tension of spring again to by the fluid flow of valve port, speed
during setting, if the liquid flow of oil suction chamber changes because of load variations, then hydraulic power
change, original spool stress balance is broken, the pressure of oil suction chamber
change, cause relief valve oil suction chamber pressure instability, the precision of voltage regulation is poor, and then can cause the pressure surge of relief valve place system, causes vibration & noise.
From the dynamic performance of relief valve, there is an axially open when oil suction chamber oil liquid pressure promotes spool
time, spool meets following dynamic force balanced equation:
（3）
Wherein:
-spring pre-compression force;
-spool active area;
-oil suction chamber pressure;
m-spool and spring-mass;
b-valve core movement viscous damping coefficient;
-spool travel;
kthe integral stiffness of-spring and hydraulic power;
Order
When
time, then the general solution of formula (3) is
（4）
Wherein
for constant, relevant with initial value and boundary conditions.
From formula (4), the equifrequent vibration mode that the displacement of spool is rendered as an amplitude time duration and decays, and damping constant
bless, damping ratio
less, amplitude time duration and decay slower, vibrates larger.
Because the viscous damping of conventional relief valve spool is less, therefore spool is in unlatching or comparatively large by external interference (change of such as excess flow) after vibration, will have a negative impact to the operation of equipment and environment.
Model utility content
For solving the problems of the technologies described above, the utility model provides a kind of relief valve with equilibrium liquid power and adjustable damping function, this relief valve can balance the change of the hydraulic power caused due to excess flow change, in formula (2) described in the reduction background technique of namely trying one's best
value, but also by the damping of regulating spool, namely can to increase in formula (4)
value, control the vibration of spool, reach under different operating mode stable system pressure, improve the object of regulation precision and vibration and noise reducing.
The technological scheme that the utility model adopts is: a kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function, comprise valve body, be arranged on the overflow spool in body cavity and be arranged on valve body one end for adjusting the pressure regulating mechanism of oil pressure relief, valve body is provided with oil suction chamber and oil back chamber, under the state being greater than the oil pressure relief of setting at the pressure of oil suction chamber, overflow spool moves to side and realizes fluid by the overflow of oil suction chamber to oil back chamber, a flow-stopping plate is fixedly connected with near one end of oil back chamber at overflow spool, the end face of flow-stopping plate towards oil suction chamber side offer around the overflow spool baffle annular groove of a week, the intersection point of the elongation line of overflow spool cone element and baffle annular groove end face is made to be positioned at the medium position in whole annular groove face.
Further optimization, the elongation line of described overflow spool cone element and the intersection point of baffle annular groove end face are positioned at the center in whole annular groove face.
Further optimization, described baffle annular groove, its groove depth is 0.7 times of groove end face radial length.
Further optimization, the one end described valve body being positioned at oil suction chamber is also provided with damping hole, and in damping hole, be provided with the damping piston of the structure that to link into an integrated entity with overflow spool, one end passing hole channel of damping hole is connected with the oil back chamber on valve body.
Further optimization, described damping piston and damping hole adopt small―gap suture to coordinate.
Further optimization, also be provided with damper regulation mechanism, described damper regulation mechanism comprises the throttling valve core that is arranged on duct and damping hole joint and for driving the driving mechanism of throttling valve core movement, by the size of the adjustable duct of rotary barrel throttle core and damping hole joint opening.
Further optimization, described pressure regulating mechanism comprises the bearing that the adjustable lever be arranged on valve body contacts with adjustable lever one end and the elastic element be arranged between bearing and overflow spool, by driving adjustable lever to drive bearing to move, realize the adjustment to elastic element precompression.
Further optimization, described elastic element is spring.
The beneficial effects of the utility model are:
One, the utility model set up baffle annular groove, after being mapped to baffle annular groove with high speed by the fluid of valve port, baffle annular groove produces the impact force to spool, its direction is make valve port open large direction, contrary with its hydraulic power direction, balance the hydraulic power produced when liquid flows through overflow valve port, inhibit hydraulic power on the impact of relief valve oil suction chamber pressure, reduce the fluctuation of system pressure, improve regulation precision.
Two, damping piston and controlling mechanism are set at spool end, when spool is due to the factor vibration of inertia, elasticity or hydraulic power or when impacting, fluid between the damping cavity volume that damping piston and damping hole are formed and oil back chamber will be flowed by throttle valve valve port, regulate valve port opening size, also just have adjusted the kinetic damping of spool, when outside operating mode changes, different dampings can be applied to it in good time, play the object of vibration and noise reducing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the partial enlarged drawing of baffle annular groove in Fig. 1.
Mark in figure: 1, valve body, 2, overflow spool, 3, oil suction chamber, 4, oil back chamber, 5, flow-stopping plate, 6, baffle annular groove, 7, damping hole, 8, damping piston, 9, duct, 10, throttling valve core, 11, adjustable lever, 12, bearing, 13, elastic element.
Embodiment
elaborate to embodiment of the present utility model below in conjunction with accompanying drawing, the present embodiment, premised on technical solutions of the utility model, give detailed mode of execution and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
As shown in the figure, a kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function, comprise valve body 1, be arranged on the overflow spool 2 in valve body 1 inner chamber and be arranged on valve body 1 one end for adjusting the pressure regulating mechanism of oil pressure relief, valve body 1 is provided with oil suction chamber 3 and oil back chamber 4, under the state being greater than the oil pressure relief of setting at the pressure of oil suction chamber 3, overflow spool 2 moves to side and realizes fluid by the overflow of oil suction chamber to oil back chamber, pressure regulating mechanism as herein described is the technology of existing maturation, such as adopt following structure: described pressure regulating mechanism comprises the adjustable lever 11 be arranged on valve body, the bearing 12 contacted with adjustable lever one end and the elastic element 13 be arranged between bearing and overflow spool, bearing is driven to move by driving adjustable lever, realize the adjustment to elastic element precompression, elastic element 13 described herein can adopt spring,
The technical program, a flow-stopping plate 5 is fixedly connected with near one end of oil back chamber 4 at overflow spool 2, the end face of flow-stopping plate 5 towards oil suction chamber 3 side offers around the overflow spool baffle annular groove 6 of a week, and make the intersection point of the elongation line of overflow spool 2 cone element and baffle annular groove 6 end face be positioned at the medium position in whole annular groove face.
This programme, most preferred structure is: specifically arranging of baffle annular groove is satisfied: the elongation line of a. spool cone element and the intersection point of baffle annular groove end face are positioned at the center in whole annular groove face, i.e. AB=0.5 × BC, as shown in Figure 2; B. groove depth is 0.7 times of groove end face radial length, i.e. BD=0.7 × BC, as shown in Figure 2.Can ensure like this by the jet of cone valve jaw not essentially exceeding baffle annular groove scope.According to fluid mechanics principle, when the oil liquid pressure of oil suction chamber 3 reaches pressure adjusting spring set pressure, overflow valve port is opened, and when fluid is flowed out by the conical surface, can produce hydraulic power to spool, its direction is the direction of impelling spool to turn down towards valve port, the factors such as hydraulic power and excess flow are relevant, and when outer work condition change causes excess flow to change, hydraulic power also can change, original stress balance state is destroyed, and causes disc vibration and pressure, flow pulsation.The utility model sets up baffle annular groove, after being mapped to baffle annular groove with high speed by the fluid of valve port, baffle annular groove produces impact force is produced to spool, its direction is make valve port open large direction, contrary with its hydraulic power direction, equilibrium liquid power can be played, reduce the influence power of hydraulic power, suppress the effect of system pressure fluctuation.
The technical program, one end that described valve body 1 is positioned at oil suction chamber 3 is also provided with damping hole 7, the damping piston 8 of the structure that to link into an integrated entity with overflow spool 2 is provided with in damping hole 7, one end passing hole channel 9 of damping hole 7 is connected with the oil back chamber 4 on valve body, described damping piston and damping hole can adopt small―gap suture to coordinate, also be provided with damper regulation mechanism, described damper regulation mechanism comprises and is arranged on duct 9 with the throttling valve core 10 of damping hole 7 joint and for driving the driving mechanism of throttling valve core movement, the size of duct 9 and damping hole 7 joint opening is regulated by rotary barrel throttle core 10, leading role is played in the motion of structure to overflow spool that link into an integrated entity of damping piston 8 and overflow spool 2, damping piston 8 cuts off damping hole 7 and makes damping hole rear end form damping cavity volume simultaneously, damping cavity volume passing hole channel 9 is connected with the oil back chamber 4 of valve body, throttling valve core 10 is provided with in the joint of duct 9 and damping cavity volume, by the size of throttling valve core adjustment opening, i.e. the size of liquid flow movement damping.When spool is due to the factor vibration of inertia, elasticity or hydraulic power or when impacting, fluid between damping cavity volume and oil back chamber 4 wants passing hole channel to flow, throttling valve core is driven to move to regulate openings of sizes, also just have adjusted the kinetic damping of overflow spool, when outside operating mode changes, different dampings can be applied to it in good time, play the object of vibration and noise reducing.
Claims (8)
1. one kind has the noise reduction relief valve of equilibrium liquid power and adjustable damping function, comprise valve body, be arranged on the overflow spool in body cavity and be arranged on valve body one end for adjusting the pressure regulating mechanism of oil pressure relief, valve body is provided with oil suction chamber and oil back chamber, under the state being greater than the oil pressure relief of setting at the pressure of oil suction chamber, overflow spool moves to side and realizes fluid by the overflow of oil suction chamber to oil back chamber, it is characterized in that: be fixedly connected with a flow-stopping plate at overflow spool near one end of oil back chamber, the end face of flow-stopping plate towards oil suction chamber side offer around the overflow spool baffle annular groove of a week, the intersection point of the elongation line of overflow spool cone element and baffle annular groove end face is made to be positioned at the medium position in whole annular groove face.
2. a kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function according to claim 1, is characterized in that: the elongation line of described overflow spool cone element and the intersection point of baffle annular groove end face are positioned at the center in whole annular groove face.
3. a kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function according to claim 1 and 2, is characterized in that: described baffle annular groove, and its groove depth is 0.7 times of groove end face radial length.
4. a kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function according to claim 1 and 2, it is characterized in that: the one end described valve body being positioned at oil suction chamber is also provided with damping hole, in damping hole, be provided with the damping piston of the structure that to link into an integrated entity with overflow spool, one end passing hole channel of damping hole is connected with the oil back chamber on valve body.
5. a kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function according to claim 4, is characterized in that: described damping piston and damping hole adopt small―gap suture to coordinate.
6. a kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function according to claim 4, it is characterized in that: be also provided with damper regulation mechanism, described damper regulation mechanism is comprised the throttling valve core that is arranged on duct and damping hole joint and for driving the driving mechanism of throttling valve core movement, is regulated the size of duct and damping hole joint opening by rotary barrel throttle core.
7. a kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function according to claim 4, it is characterized in that: described pressure regulating mechanism comprises the bearing that the adjustable lever be arranged on valve body contacts with adjustable lever one end and the elastic element be arranged between bearing and overflow spool, by driving adjustable lever to drive bearing to move, realize the adjustment to elastic element precompression.
8. a kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function according to claim 7, is characterized in that: described elastic element is spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520035982.8U CN204476904U (en) | 2015-01-20 | 2015-01-20 | A kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520035982.8U CN204476904U (en) | 2015-01-20 | 2015-01-20 | A kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204476904U true CN204476904U (en) | 2015-07-15 |
Family
ID=53632695
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520035982.8U Expired - Fee Related CN204476904U (en) | 2015-01-20 | 2015-01-20 | A kind of noise reduction relief valve with equilibrium liquid power and adjustable damping function |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613036A (en) * | 2015-01-20 | 2015-05-13 | 洛阳理工学院 | Noise reduction overflow valve with hydrodynamic force balancing and adjustable damping functions |
| CN105715621A (en) * | 2016-04-28 | 2016-06-29 | 黄斌 | Direct relief valve with guide structure |
| CN109296794A (en) * | 2018-09-20 | 2019-02-01 | 青岛科技大学 | A kind of adjustable slide valve flow controller of precompressed |
-
2015
- 2015-01-20 CN CN201520035982.8U patent/CN204476904U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613036A (en) * | 2015-01-20 | 2015-05-13 | 洛阳理工学院 | Noise reduction overflow valve with hydrodynamic force balancing and adjustable damping functions |
| CN105715621A (en) * | 2016-04-28 | 2016-06-29 | 黄斌 | Direct relief valve with guide structure |
| CN109296794A (en) * | 2018-09-20 | 2019-02-01 | 青岛科技大学 | A kind of adjustable slide valve flow controller of precompressed |
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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: 20150715 Termination date: 20160120 |
|
| EXPY | Termination of patent right or utility model |