CN208474579U - A kind of safe valve core of high-reliability low-pressure - Google Patents
A kind of safe valve core of high-reliability low-pressure Download PDFInfo
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- CN208474579U CN208474579U CN201820993471.0U CN201820993471U CN208474579U CN 208474579 U CN208474579 U CN 208474579U CN 201820993471 U CN201820993471 U CN 201820993471U CN 208474579 U CN208474579 U CN 208474579U
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- spool
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Abstract
The utility model discloses a kind of safe valve core of high-reliability low-pressure, described spool (1) one end is frustum (2) shape, and the outer circle of frustum is equipped with seal groove (3), is equipped with sealing ring (4) in seal groove；Spool (1) other end is equipped with one section of external screw thread (6), and external screw thread (6) is equipped with pin hole (7) by spool (1) endface；Seal groove is equipped with one group of oil leak hole (5) by the bottom of end face side.Seal groove 3 bottom of the utility model on spool 1 processes oil leak hole 5, and it can also be inclined hole as shown in Figure 3 and Figure 4 that oil leak hole 5, which can be straight hole,.Oil leak hole 5 is used for the relief hole after sealing ring 4 is stretched by hydraulic coupling.By 4 bottom pressure release of seal groove, and according to the diameter of 10 vent flow size of low pressure chamber adjustment oil leak hole 5, prevents sealing ring 4 because being extruded seal groove 4 in low-pressure safety valve opening process, lead to seal failure.
Description
Technical field
The utility model relates to a kind of safe valve cores of high-reliability low-pressure, belong to electro-hydraulic actuator control technology field.
Background technique
Electro-hydraulic actuator is mechanical electronic hydraulic integrated system, and, using hydraulic oil as the medium of energy transmission, it passes through control high pressure for it
The flow direction of hydraulic oil pushes connecting rod, to control the rotation of rudder face.Low pressure is equipped in the sleeve of electro-hydraulic actuator inner piston to pacify
Full valve, low-pressure safety valve are equipped with sealing ring.Existing sealing ring at work, there are low-voltage safety protect pressure it is not high,
Sealing ring is easy to squeeze out seal groove in low-pressure safety valve opening process, leads to seal failure, work insecure technical problem.
Utility model content
The purpose of this utility model is to provide a kind of safe valve core of high-reliability low-pressure, by the improvement to spool,
It avoids leading to seal failure because sealing ring is extruded seal groove in low-pressure safety valve opening process, improves the work of low-pressure safety valve
Make reliability, thus overcome the deficiencies in the prior art.
To achieve the above objectives, the present invention adopts the following technical solutions:
A kind of safe valve core of high-reliability low-pressure of the utility model, including spool, described spool one end be it is pyramidal,
The outer circle of frustum is equipped with seal groove, is equipped with sealing ring in seal groove；The spool other end is equipped with one section of external screw thread, and external screw thread leans on spool
Endface is equipped with pin hole；Seal groove is equipped with one group of oil leak hole by the bottom of end face side.
In the aforementioned safe valve core of high-reliability low-pressure, the larger diameter end of the frustum is towards spool end.
In the aforementioned safe valve core of high-reliability low-pressure, one group of oil leak hole is circumferentially equal centered on the axis of spool
Cloth.
In the aforementioned safe valve core of high-reliability low-pressure, the oil leak hole is straight hole or inclined hole；Axis of the inclined hole to spool
Direction inclination.
By adopting the above-described technical solution, the utility model is compared with prior art, the utility model is by sealing
Oil leak hole is arranged in slot, makes the influence of low-pressure safety valve unprotected pressure size during the work time, generates in sealing ring small
Hydraulic oil can prevent sealing ring in low-pressure safety valve opening process from sealing trench bottom oil leak hole quick pressure releasing in the state of deformation
In be extruded seal groove, lead to seal failure.To improve the reliability of low-pressure safety valve opening process sealing, it is ensured that product matter
Amount, is with a wide range of applications in terms of electrohydraudic servomechanism low-voltage safety protection.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the axonometric drawing of Fig. 1；
Fig. 3 is the schematic diagram that oil leak hole is inclined hole；
Fig. 4 is the axonometric drawing of Fig. 3；
Fig. 5 is the working principle diagram of the utility model；
Fig. 6 is the axonometric drawing of Fig. 5.
It is marked in figure as follows: 1- spool, 2- frustum, 3- seal groove, 4- sealing ring, 5- oil leak hole, 6- external screw thread, 7- pin
Hole, 8- electro-hydraulic actuator oil cylinder, 9- piston, 10- low pressure chamber, 11- high pressure chest, 12- valve pocket, 13- inner conical surface, 14- spring, 15- tune
Whole gasket, 16- nut.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
A kind of safe valve core of high-reliability low-pressure of the utility model, as depicted in figs. 1 and 2: described 1 one end of spool is
2 shape of frustum, the outer circle of frustum 2 are equipped with seal groove 3, are equipped with sealing ring 4 in seal groove 3；1 other end of spool is equipped with one section of external screw thread
6, external screw thread 6 is equipped with pin hole 7 by 1 endface of spool；Seal groove 3 is equipped with one group of oil leak hole 5 by the bottom of end face side.Frustum 2
Larger diameter end towards 1 end face of spool.As shown in Fig. 2, one group of oil leak hole 5 is uniformly distributed along the circumference centered on the axis of spool.It lets out
Oilhole 5 is straight hole or inclined hole；As shown in Figure 3 and Figure 4: inclined hole is tilted to the axis direction of spool 1.
Embodiment
The safe valve core of the high-reliability low-pressure of this example, as shown in Figure 1 to 4: being made of spool 1 and sealing ring 4.Sealing
In the seal groove 3 on the frustum 2 of spool 1, seal groove 3 is uniformly distributed along the circumference by the bottom of end face side equipped with one group 4 sets of circle
Oil leak hole 5.
The spool of the utility model is one of the main component in low-pressure safety valve, and low-pressure safety valve is used for electro-hydraulic actuator.
Electro-hydraulic actuator is mechanical electronic hydraulic integrated system, medium of the electro-hydraulic actuator using hydraulic oil as energy transmission, and electro-hydraulic actuator passes through control
The flow direction of high pressure liquid pressure oil pushes connecting rod, to control the rotation of rudder face.Low-pressure safety valve is located at low pressure chamber 10, low pressure
Safety valve is the main function components of electro-hydraulic actuator pressure protection, and effect is to prevent steering engine low pressure chamber because of oil liquid heating expansion etc.
Factor causes 10 pressure of low pressure chamber excessive and damages.
Position of the spool of the utility model in electro-hydraulic actuator is as shown in Figure 5 and Figure 6, and spool 1 is mounted on electro-hydraulic actuator
On piston 9 in oil cylinder 8.Piston 9 divides electro-hydraulic actuator oil cylinder 8 for low pressure chamber 10 and high pressure chest 11；The low pressure chamber 10 1 of piston 9
Side is equipped with valve pocket 12, and spool 1 is mounted in valve pocket 12.The frustum 2 of spool 1 and the inner conical surface 13 of valve pocket 12 cooperate, on frustum 2
The inner conical surface 13 of sealing ring 4 and valve pocket 12 seals.Spring 14 is cased on spool 1, the boss in 14 one end of spring and valve pocket 12 connects
It connects, 14 other end of spring is connect with adjustment 15 side of gasket, and adjustment 15 other side of gasket is equipped with nut 16, nut 16 and spool 1
On external screw thread 6 be screwed on.Nut 16 passes through the pin shaft anti-back that is inserted in pin hole 7.Spool and 9 upper valve sleeve 12 of piston, collectively form
Low-pressure safety valve.
The course of work of low-pressure safety valve is as follows: the sealing of low-pressure safety valve by spool 1 frustum 2 and valve pocket 12 it is interior
The conical surface 13 cooperates, and cone match position is sealed by sealing ring 4.When 10 pressure of low pressure chamber is excessive, the liquid of high pressure chest 11
Pressure oil pushes spool 1 to move downward, and during spool 1 moves downward, the gap of 13 radial direction of frustum 2 and inner conical surface increases, when
Gap continues to increase to certain distance, and sealing ring 4 is separated with inner conical surface 13, and the hydraulic oil of low pressure chamber 10 is quickly revealed at this time, from
And 10 pressure of low pressure chamber is reduced, play the purpose of protection low pressure chamber 10.Pressure release back valve core 1 restores low pressure under action from the spring 14
The sealing of safety valve.
The prior art has the following problems in the above-mentioned course of work: first is that due to the influence of the factors such as 4 elasticity of sealing ring,
There are low-voltage safeties to protect pressure not high for low-pressure safety valve, the insecure problem of leakproofness after low-pressure safety valve is opened.Work as sealing
Enclose 4 coefficient of elasticity it is smaller when, low-pressure safety valve open after seal failure it is particularly problematic, component pressure detection-phase seal
Failure ratio is up to 50% or more, and there are larger hidden dangers for low-pressure safety valve unlatching.Second is that when low-pressure safety valve setting cracking pressure compared with
When high or sealing ring elastic force is smaller, hydraulic coupling can overcome the pulling force of sealing ring radial direction, make sealing ring ruler in the radial direction
Very little continuous expansion, since frustum 2 and 13 two sides of inner conical surface are there are larger pressure difference, spool 1 in moving process sealing ring 4 hydraulic
Power effect under squeezed out out of seal groove 3, be constantly filled in the gap between frustum 2 and inner conical surface 13, until sealing ring 4 with
Seal request is not able to satisfy between seal groove 3, low pressure chamber is just able to achieve pressure release, at this point, sealing ring 4 is largely filled in frustum
In gap between 2 and inner conical surface 13.Due to the difference of fit clearance, 14 pulling force of spring in 13 all directions of frustum 2 and inner conical surface
And the reasons such as the deviation of axial direction, 4 each position elastic force of sealing ring is uneven, cause pressure release integrally cannot uniformly reveal, seal
It encloses 4 local locations and is extruded pressure release, and spool 1 back moves under the elastic force effect of spring 14 while pressure release, sealing ring 4
The local location being extruded after pressure release can not return in former seal groove 3, lead to low-pressure safety valve seal failure.
The technical solution of this example is as depicted in figs. 1 and 2, is 3 bottom of the seal groove processing oil leak hole 5 on spool 1, draining
Hole 5 can be straight hole, can also be inclined hole as shown in Figure 3 and Figure 4.Oil leak hole 5 is used for letting out after sealing ring 4 is stretched by hydraulic coupling
Press hole.By 4 bottom pressure release of seal groove, and according to the diameter of 10 vent flow size of low pressure chamber adjustment oil leak hole 5, sealing ring is prevented
4, because being extruded seal groove 4 in low-pressure safety valve opening process, lead to seal failure.
Claims (4)
1. a kind of safe valve core of high-reliability low-pressure, including spool (1), it is characterised in that: described spool (1) one end is frustum
(2) outer circle of shape, frustum (2) is equipped with seal groove (3), is equipped with sealing ring (4) in seal groove (3)；Spool (1) other end is equipped with one
Section external screw thread (6), external screw thread (6) are equipped with pin hole (7) by spool (1) endface；Seal groove (3) is equipped with by the bottom of end face side
One group of oil leak hole (5).
2. the safe valve core of high-reliability low-pressure according to claim 1, it is characterised in that: the major diameter of the frustum (2)
It holds towards spool (1) end face.
3. the safe valve core of high-reliability low-pressure according to claim 1, it is characterised in that: one group of oil leak hole (5) with
It is uniformly distributed along the circumference centered on the axis of spool (1).
4. the safe valve core of high-reliability low-pressure according to claim 1, it is characterised in that: the oil leak hole (5) is straight hole
Or inclined hole；Inclined hole is tilted to the axis direction of spool (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820993471.0U CN208474579U (en) | 2018-06-26 | 2018-06-26 | A kind of safe valve core of high-reliability low-pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820993471.0U CN208474579U (en) | 2018-06-26 | 2018-06-26 | A kind of safe valve core of high-reliability low-pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208474579U true CN208474579U (en) | 2019-02-05 |
Family
ID=65215295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820993471.0U Active CN208474579U (en) | 2018-06-26 | 2018-06-26 | A kind of safe valve core of high-reliability low-pressure |
Country Status (1)
| Country | Link |
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| CN (1) | CN208474579U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114634147A (en) * | 2022-04-20 | 2022-06-17 | 塔罗斯科技股份有限公司 | Pressure relief structure of cask |
-
2018
- 2018-06-26 CN CN201820993471.0U patent/CN208474579U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114634147A (en) * | 2022-04-20 | 2022-06-17 | 塔罗斯科技股份有限公司 | Pressure relief structure of cask |
| CN114634147B (en) * | 2022-04-20 | 2024-04-23 | 塔罗斯科技股份有限公司 | Decompression structure of wine barrel |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20200728 Address after: 550009, Honghe Road, Guiyang economic and Technological Development Zone, Guizhou 7, China Co-patentee after: JIANGNAN ELECTROMECHANICAL DESIGN Research Institute Patentee after: GUIZHOU AEROSPACE CONTROL TECHNOLOGY Co.,Ltd. Address before: 550025 Honghe Road, Huaxi District, Guiyang, Guizhou 7 Patentee before: GUIZHOU AEROSPACE CONTROL TECHNOLOGY Co.,Ltd. |