CN110056689A - A kind of pilot operated compound relief valve - Google Patents
A kind of pilot operated compound relief valve Download PDFInfo
- Publication number
- CN110056689A CN110056689A CN201910214894.7A CN201910214894A CN110056689A CN 110056689 A CN110056689 A CN 110056689A CN 201910214894 A CN201910214894 A CN 201910214894A CN 110056689 A CN110056689 A CN 110056689A
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- China
- Prior art keywords
- main valve
- circumferential direction
- compensating tank
- valve
- pilot
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a kind of pilot operated compound relief valves, including main valve and pilot valve two parts, main valve includes main valve body, main valve housing, main valve plug, spring cavity, main valve reset spring, and pilot valve includes pilot valve body, guide's valve base, pilot valve core, pilot valve pressure spring, ring-shaped step hole, guide piston, guide cylinder, pressure regulation spiral shell handle, pressure regulating cavity；It is machined with three groups of double micro- shape holes on the outer cylinder surface of main valve plug, and is machined with square equal cross-section circumferential direction compensating tank, V-arrangement gradual-enlargement type circumferential direction compensating tank and U-shaped cross-section circumferential direction compensating tank on main valve plug；It is uniformly processed along its direction of axis line there are six chamber is damped on the outer end face of damping sleeve, sound-absorbing material particle is filled in each damping cavity room, and block each damping chamber by noise elimination screw and weakening pad.The present invention can farthest eliminate the noise and vibration of pilot valve, while can compensate for the hydraulic power of main valve plug, to improve the performance of entire pilot operated compound relief valve.
Description
Technical field
The present invention relates to technical field of valve manufacturing more particularly to a kind of pilot operated compound relief valves.
Background technique
Water hydraulics is the new skill using natural fresh water, seawater or tap water proxy mineral oil as hydraulic system working media
Art belongs to hydraulic transmission technology as hydraulic technology.In the development process of hydraulic transmission technology, water is passed as power
The media passed, exchange and controlled once played very important effect.In shortage of resources and environmentally friendly today is advocated, using water conduct
The working media of hydraulic transmission technology has friendly, environment friendly and pollution-free ecology, clean and safe, can avoid fire, is from a wealth of sources, easy
In the care and maintenance the advantages that.When overflow valve is in an aqueous medium in use, a series of such as cavitation erosions and cavitation wear, drawing can be generated
Silk corrodes and the technical problems such as erosion, leakage rate big, compression shock, vibration and noise.
It is 201510259603.8 " leading type water pressure overflow valves " announced according to Chinese invention patent application number, mainly will
Parabolic shape is processed into the front end of main valve plug, improves the anti-cavitation ability of main valve plug；It is machined with conduction hole on main valve plug, presses down
System cavitation erosion reduces noise；It is machined with micro- shape hole on main valve plug, improve the hydrodynamic lubrication effect of main valve plug and can store miscellaneous
Matter reduces wire drawing and corrodes；The valve mouth structure that two-step throttle is formed between first pilot valve seat and pilot valve core, can reduce gas
Erosion；By being provided with guide piston and guide cylinder, a pressure regulating cavity is collectively constituted, on the one hand, pilot valve core and pilot valve valve
Guiding mating surface between body can reduce pilot valve core because of polarization caused by by uneven radial force, on the other hand, pilot valve
When valve core movement, the pressure change in pressure regulating cavity increases the kinetic damping of spool, to improve the job stability of pilot valve；
By offering annular groove on guide piston, the hydraulic power of pilot valve core can compensate for, simultaneously because liquid flow path direction changes
Become, generate the jet flow force of one with pilot valve pressure spring spring force opposite direction, improves the stability of pilot valve core stroke.
The leading type water pressure overflow valve of above structure can reduce cavitation damage, improve dynamic between main valve plug and main valve housing
Pressure lubricating performance stores the impurity in aqueous medium, reduces wire drawing and corrodes, and reduces vibration, noise to a certain extent.But this
Using cone valve structure, pilot valve core is opening or closing pilot valve core in the leading type water pressure overflow valve of kind structure
When, speed is very fast, or even can reach tens to several hundred metre per second (m/s)s, therefore be easy to produce vibration, to generate high frequency howl
Cry collectively constitutes a pressure regulating cavity, can increase pilot valve to a certain extent although being provided with guide piston and guide cylinder
The stability of spool reduces noise, still can not reduce vibration and noise to the full extent to leading type water pressure overflow valve performance
Influence.The leading type water pressure overflow valve of above structure in use, when water flow flows through main valve plug, surge by generation simultaneously
Power can not compensate, and when the flow of primary valve is larger, hydraulic power can be larger, or even will cause main valve plug motion failures, from
And affect the performance of entire pilot operated compound relief valve.
Summary of the invention
The present invention in order to overcome the shortcomings in the prior art, provides a kind of pilot operated compound relief valve, is suitable for mesohigh water
Hydraulic system can farthest eliminate the noise and vibration of pilot valve, while can compensate for the hydraulic power of main valve plug, thus
Improve the performance of entire pilot operated compound relief valve.
The present invention is achieved through the following technical solutions:
A kind of pilot operated compound relief valve, including main valve and pilot valve two parts, the main valve include main valve body, main valve housing, main valve plug,
Spring cavity, main valve reset spring, the main valve plug is sliding valve structure, and is machined with throttling channel and four conduction holes, the guide
Valve includes pilot valve body, guide's valve base, pilot valve core, pilot valve pressure spring, ring-shaped step hole, guide piston, leads
To cylinder, pressure regulation spiral shell handle, pressure regulating cavity, the pilot valve core is cone valve structure, and annular groove is machined on guide piston,
The front end of guide's valve base is provided with damping sleeve；Three groups of double micro- shape holes are machined on the outer cylinder surface of the main valve plug,
And square equal cross-section circumferential direction compensating tank, V-arrangement gradual-enlargement type circumferential direction compensating tank and U-shaped cross-section ring are machined on the main valve plug
To compensating tank；It is uniformly processed along its direction of axis line there are six chamber is damped, in each resistance on the outer end face of the damping sleeve
It is filled with sound-absorbing material particle in Buddhist nun's chamber, and is blocked each damping chamber by noise elimination screw and weakening pad.
Further, the V-arrangement gradual-enlargement type circumferential direction compensating tank is located at the square equal cross-section circumferential direction compensating tank and U-shaped etc. and cuts
Face ring is between compensating tank, and the square equal cross-section circumferential direction compensating tank, V-arrangement gradual-enlargement type circumferential direction compensating tank and U-shaped cross-section
Circumferential compensating tank is process by rectangle shape milling cutter, angle milling cutter, cylindrical milling cutter along the circumferencial direction of main valve plug respectively,
The depth of the square equal cross-section circumferential direction compensating tank, V-arrangement gradual-enlargement type circumferential direction compensating tank and U-shaped cross-section circumferential direction compensating tank is
600-1000 microns, width is 500-900 microns.
Further, double micro- shape hole and square equal cross-section circumferential direction compensating tank, V-arrangement gradual-enlargement type circumferential direction compensating tank and U-shaped
Cross-section circumferential direction compensating tank distributes alternately.
Further, the sound-absorbing material particle uses porous ceramics for substrate, surface, hole wall in porous ceramics substrate
On be formed with crystalline state sound-absorbing raw material.
Compared with prior art, the beneficial effects of the present invention are:
1, fluid first passes around square equal cross-section circumferential direction compensating tank, then passes through V-arrangement gradual-enlargement type circumferential direction compensating tank, finally passes through U
Shape cross-section circumferential direction compensating tank, so that fluid is flowed in slot, due to square equal cross-section circumferential direction compensating tank, V-arrangement gradual-enlargement type
The drainage of the notch of circumferential compensating tank and U-shaped cross-section circumferential direction compensating tank, reduces the spray angle of fluid, makes in this way
Hydraulic power is obtained to be compensated.After being analyzed using Fluent software and ANSYS software, discovery: using the master of this structure
Spool can farthest reduce hydraulic power, to prevent main valve plug motion failures.Cross-section circumferential direction compensating tank is distributed in gradually
The two sides of expansion formula circumferential direction compensating tank, can balance the power along direction of axis line, prevent because introduce square equal cross-section circumferential direction compensating tank,
V-arrangement gradual-enlargement type circumferential direction compensating tank and U-shaped cross-section circumferential direction compensating tank and generate polarization.
2, by being filled with sound-absorbing material particle in damping chamber, pilot valve core can be absorbed and open or close quick
The vibration generated when closing, to farthest absorb noise, and using noise elimination screw and weakening pad by each damping chamber into
Row blocks, and on the one hand can reduce the ante-chamber volume of pilot valve, on the other hand can increase the viscous damping of pilot valve, further
Absorb noise.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the partial sectional view of main valve plug in the present invention；
Fig. 3 is the cross-sectional view of damping sleeve in the present invention；
Fig. 4 is the side view of damping sleeve in the present invention.
In figure: 1- main valve body；2- main valve housing；3- main valve plug；4- main valve reset spring；5- pilot valve body；6- pilot valve
Valve seat；7- pilot valve core；8- pilot valve pressure spring；9- throttling channel；10- conduction hole；The double micro- shape hole 11-；12- step
Hole；13- guide piston；14- guide cylinder；15- pressure regulation spiral shell handle；16- pressure regulating cavity；17- annular groove；18- spring cavity；19- main valve
Spring base；20- radial through-hole；21- guide's valve spring retainer；22- damping sleeve；23- damps chamber；24- sound-absorbing material particle；25-
Noise elimination screw；26- weakening pad；31- square equal cross-section circumferential direction compensating tank；32-V shape gradual-enlargement type circumferential direction compensating tank；33-U shape etc. is cut
Face ring is to compensating tank；The horizontal liquid of a- hinders hole；The vertical liquid of b- hinders hole；The resistance of c- fixer；D- runner；P- water inlet；T- water outlet；K-
It is remotely controlled mouth.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, pilot operated compound relief valve provided by the invention is to be based on Chinese invention patent application number
201510259603.8 " leading type water pressure overflow valve " announced improves.Specifically, the pilot-operated type overflow in the present invention
Valve is using second level concentric structure, compared with three-level concentric structure, the valve port face of the pilot operated compound relief valve of second level concentric structure
Product gradient is greater than three-level concentric structure, sensitive.The pilot operated compound relief valve includes main valve and pilot valve two parts, the axis of main valve
The axial line of heart line and pilot valve is mutually perpendicular to.Main valve includes main valve body 1, main valve housing 2, main valve plug 3, and main valve housing 2 is mounted on master
In the hole of valve body 1, main valve plug 3 is mounted in main valve housing 2；Main valve reset spring 4 is installed in the spring cavity 18 of main valve plug 3, it is main
The end contact of valve reset spring 4 is mounted on main spool spring seat 19 on the lower end surface of spring cavity 18, main valve reset spring
4 select the lesser helical spring of rigidity.Radial through-hole 20 is offered on main valve housing 2, is led between main valve housing 2 and main valve body 1
It crosses rectangular seal and elliptical seal ring is sealed, sealing ring is made of nitrile rubber, it has extremely low rub
Coefficient and good self-lubricating property are wiped, it is good to move static sealing effect for long service life.Main valve plug 3 using sliding valve structure,
Parabolic shape is processed into the end of main valve plug 3, using the main valve plug 3 of this shape, can the cavitation shock of concentration from
It extends back away at valve port of main valve, this position that cavitation erosion is generated and damaged location are inconsistent, protect valve port of main valve, improve
The anti-cavitation ability of main valve plug 3.Throttling channel 9 is offered along its direction of axis line in the end of main valve plug 3, the throttling channel 9 is by justifying
Shell of column and conical section form, the throttling channel area of passage change rate of cylindrical section be it is constant, be conducive to improve aqueous medium flow special
The rigidity of property, the throttling channel of conical section enables to hydraulic radial power to be balanced, suitable for mesohigh hydraulic system.From section
The cylindrical section inner wall surface of chute 9 is radially opened up outward there are four conduction hole 10, can be improved the pressure at Main valve outlet,
The pressure difference for reducing main valve inlet and outlet effectively inhibits cavitation erosion, reduces vibration and noise.The inner surface of main valve housing 2 and main valve plug 3
It is secondary that friction is formed between cylindrical outer surface, theoretical according to wedge-shaped dynamic pressure: viscous fluid is brought into simultaneously with the secondary movement of friction
Full of between the surface of friction pair with wedge gap, computational fluid dynamics pressure is generated to balance external applied load, reaches good lubrication
Purpose.By being machined with three groups of double micro- shape holes 11 on the external cylindrical surface of main valve plug 3, the dynamic pressure profit of main valve plug 3 can be improved
Slip energy, while double micro- shape hole 11 can be used as nail collection slot, accommodate the boundary lubrication because between main valve housing 2 and main valve plug 3
Or the impurity particle carried in the abrasive dust and aqueous medium of dry friction generation, to reduce abrasion, extend main valve plug 3 uses the longevity
Life.In the present embodiment, using laser machining, the power density of laser beam is high, poly- through optical system in double micro- shape hole 11
Coke can form the minimum hot spot of micron dimension on the surface of main valve plug 3, belong to noncontact procession, process velocity is fast, efficiency
Quickly, heat affected area is small for height, noiseless, while moving speed of laser beam, thermal deformation very little.
As shown in Figure 1, pilot valve includes pilot valve body 5, guide's valve base 6, pilot valve core 7, pilot valve pressure regulation bullet
Spring 8, guide's valve base 6 and pilot valve core 7 are installed in pilot valve body 5.Pilot valve core 7 is using cone valve
Structure, cone valve structure are sealed by the conical surface of pilot valve core 7 and guide's valve base 6, sealing force with increasing for pressure and
Increase, sealing effect is good, easily obtains higher adjusting pressure, reduces the fit tolerance between moving component, realizes zero leakage；Together
When cone valve type structure it is relatively good to the adaptability of aqueous medium, the abrasion of pilot valve core 7 can be compensated automatically.But cone valve type knot
The spool of structure during the motion, not only does axial vibration, but also do and radially wobble, and two kinds of movements all generate noise, therefore in guide
Valve core 7 is equipped with a guide piston 13, guide piston 13 and the guide cylinder 14 being mounted on pressure regulation spiral shell handle 15, pilot valve valve
Spool bore in body 5 collectively forms a pressure regulating cavity 16, is between guide piston 13, guide cylinder 14 and the spool bore of pilot valve
Clearance fit installation.By being provided with guide piston 13, radially wobbling for pilot valve core 7 can be overcome.When pilot valve core 7
When opening, pilot valve core 7 generates movement, and the volume of pressure regulating cavity 16 reduces, pressure rise, at this point, pressure regulating cavity 16 generates one
A additional forces opposite with 7 direction of motion of pilot valve core improve to increase the kinetic damping of pilot valve core 7
Stroke stability prevents pilot valve core 7 from vibrating, and reduces noise.Pressure regulation spiral shell handle 15 is mounted in pilot valve body 5, institute
It states and is sealed between pilot valve body 5 and pressure regulation spiral shell handle 15 by rectangular seal.It is equipped in the end of pressure regulation spiral shell handle 15
Guide's valve spring retainer 21, pilot valve pressure spring 8 are mounted on guide's valve spring retainer 21, and the selection of pilot valve pressure spring 8 is rigid
Biggish helical spring is spent, the frequency and amplitude of slowing down vibration are capable of, reduces noise.The front end setting of first pilot valve seat 6
There is damping sleeve 22.The concentric ring different there are two diameter is opened up on a side end face of the guide piston 13 towards pilot valve core 7
One end of shape slot 17, the section semicircular in shape of annular groove 17, guide piston 13 carries out chamfer machining processing.By the way that annular groove is arranged
17 can change the direction of liquid stream, on the one hand to compensate the hydraulic power of pilot valve core 7, on the other hand due to liquid flow path direction
Change, generates the jet flow force of one with 8 spring force opposite direction of pilot valve pressure spring.The interior bore ends of guide's valve base 6
Ring-shaped step hole 12 is offered at cone angle, so that guide's valve base 6 and pilot valve core 7 form the valve port knot with two-step throttle
Structure, when pilot valve core 7 is opened, every grade of valve port has been borne by pressure difference, can reduce cavitation erosion.
As shown in Figure 1, water inlet P, water outlet T and remote control mouth K are offered on main valve body 1, in water inlet P and water outlet
In the runner of T, bending part is all made of arc transition, when aqueous medium impacts arc-shaped bending part, enables to impact splash
Part energy is offset, flow velocity is made to tend to be uniform as early as possible.On the one hand the aqueous medium flowed into from water inlet P acts on main valve plug 3
On the other hand lower end is communicated through horizontal liquid resistance hole a, the vertical liquid resistance hole b on main valve body 1 with the ante-chamber of pilot valve body 5, through elder generation
Fixer resistance c on pilot valve valve body 5 offers stream on main valve body 1 and pilot valve body 5 into the spring cavity 18 of main valve plug 3
Road d and water outlet T-phase are logical.
The present invention and the difference of above structure essentially consist in:
As depicted in figs. 1 and 2, three groups of double micro- shape holes 11 are machined on the outer cylinder surface of the main valve plug 3, and described
It is circumferential that square equal cross-section circumferential direction compensating tank 31, V-arrangement gradual-enlargement type circumferential direction compensating tank 32 and U-shaped cross-section are machined on main valve plug 3
Compensating tank 33.The V-arrangement gradual-enlargement type circumferential direction compensating tank 32 is located at the square equal cross-section circumferential direction compensating tank 31 and U-shaped cross-section ring
To between compensating tank 33, and the square equal cross-section circumferential direction compensating tank 31, V-arrangement gradual-enlargement type circumferential direction compensating tank 32 and U-shaped etc. are cut
Face ring is processed by rectangle shape milling cutter, angle milling cutter, cylindrical milling cutter along the circumferencial direction of main valve plug 3 respectively to compensating tank 33
It forms, the square equal cross-section circumferential direction compensating tank 31, V-arrangement gradual-enlargement type circumferential direction compensating tank 32 and U-shaped cross-section circumferential direction compensating tank
33 depth is 600-1000 microns, and width is 500-900 microns.On the one hand it by processing double micro- shape hole 11, can be improved
The hydrodynamic lubrication performance of main valve plug 3, while double micro- shape hole 11 can be used as nail collection slot, accommodate because of main valve housing 2 and main valve plug 3
Between boundary lubrication or the dry friction abrasive dust and aqueous medium that generate in the impurity particle that carries, to reduce abrasion, extension
The service life of main valve plug 3.On the other hand by being machined with square equal cross-section circumferential direction compensating tank 31, the compensation of V-arrangement gradual-enlargement type circumferential direction
Slot 32 and U-shaped cross-section circumferential direction compensating tank 33, fluid first flowed through square equal cross-section circumferential direction compensating tank 31, then flowed through
V-arrangement gradual-enlargement type circumferential direction compensating tank 32, finally stream passes through U-shaped cross-section circumferential direction compensating tank 33, so that fluid is flowed in slot,
Due to the slot of square equal cross-section circumferential direction compensating tank 31, V-arrangement gradual-enlargement type circumferential direction compensating tank 32 and U-shaped cross-section circumferential direction compensating tank 33
The drainage of mouth, reduces the spray angle of fluid, so that hydraulic power is compensated.Using Fluent software and
After ANSYS software is analyzed, discovery: using the main valve plug of this structure, can farthest reduce hydraulic power, thus anti-
Only main valve plug motion failures.
As depicted in figs. 1 and 2, double micro- shape hole 11 is compensated with square equal cross-section circumferential direction compensating tank 31, V-arrangement gradual-enlargement type circumferential direction
Slot 32 and U-shaped cross-section circumferential direction compensating tank 33 distribute alternately.Cross-section circumferential direction compensating tank is distributed in gradual-enlargement type circumferential direction compensating tank
Two sides, the power along direction of axis line can be balanced, prevent because introduce square equal cross-section circumferential direction compensating tank 31, V-arrangement gradual-enlargement type ring
Polarization is generated to compensating tank 32 and U-shaped cross-section circumferential direction compensating tank 33.
As shown in figure 1, figure 3 and figure 4, six are uniformly machined with along its direction of axis line on the outer end face of the damping sleeve 22
A damping chamber 23 is filled with sound-absorbing material particle 24 in each damping chamber 23, and passes through noise elimination screw 25 and weakening pad
26 block each damping chamber 23.By being filled with sound-absorbing material particle 24 in damping chamber 23, elder generation can be absorbed
The vibration that pilot valve spool is generated when quickly opening or closing to farthest absorb noise, and uses noise elimination screw 25
Each damping chamber 23 is blocked with weakening pad 26, on the one hand can reduce the ante-chamber volume of pilot valve, another aspect energy
The viscous damping for enough increasing pilot valve, further absorbs noise.
The sound-absorbing material particle 24 uses porous ceramics for substrate, is formed on the surface of porous ceramics substrate, hole wall
There is crystalline state sound-absorbing raw material.Porous ceramics substrate is capable of providing abundant, uniform micron order cellular structure, so having good suction
Audio fruit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (4)
1. a kind of pilot operated compound relief valve, including main valve and pilot valve two parts, the main valve includes main valve body (1), main valve housing
(2), main valve plug (3), spring cavity (18), main valve reset spring (4), the main valve plug (3) is sliding valve structure, and is machined with throttling
Slot (9) and four conduction holes (10), the pilot valve include pilot valve body (5), guide's valve base (6), pilot valve core
(7), pilot valve pressure spring (8), ring-shaped step hole (12), guide piston (13), guide cylinder (14), pressure regulation spiral shell handle (15),
Pressure regulating cavity (16), the pilot valve core (7) is cone valve structure, and annular groove (17) are machined on guide piston (13),
The front end of guide's valve base (6) is provided with damping sleeve (22)；It is characterized by:
Three groups of double micro- shape holes (11) are machined on the outer cylinder surface of the main valve plug (3), and on the main valve plug (3)
It is machined with square equal cross-section circumferential direction compensating tank (31), V-arrangement gradual-enlargement type circumferential direction compensating tank (32) and U-shaped cross-section circumferential direction compensating tank
(33)；
It is uniformly processed along its direction of axis line there are six chamber (23) are damped, each on the outer end face of the damping sleeve (22)
It damps in chamber (23) and is filled with sound-absorbing material particle (24), and pass through noise elimination screw (25) and weakening pad (26) for each damping
Chamber (23) is blocked.
2. a kind of pilot operated compound relief valve according to claim 1, it is characterised in that: the V-arrangement gradual-enlargement type circumferential direction compensating tank
(32) between the square equal cross-section circumferential direction compensating tank (31) and U-shaped cross-section circumferential direction compensating tank (33), and the rectangle
Cross-section circumferential direction compensating tank (31), V-arrangement gradual-enlargement type circumferential direction compensating tank (32) and U-shaped cross-section circumferential direction compensating tank (33) respectively by
Rectangle shape milling cutter, angle milling cutter, cylindrical milling cutter are process along the circumferencial direction of main valve plug (3), and described rectangle etc. is cut
Face ring is to the depth of compensating tank (31), V-arrangement gradual-enlargement type circumferential direction compensating tank (32) and U-shaped cross-section circumferential direction compensating tank (33)
600-1000 microns, width is 500-900 microns.
3. a kind of pilot operated compound relief valve according to claim 2, it is characterised in that: double micro- shape hole (11) and rectangle etc. are cut
Face ring distributes alternately to compensating tank (31), V-arrangement gradual-enlargement type circumferential direction compensating tank (32) and U-shaped cross-section circumferential direction compensating tank (33).
4. a kind of pilot operated compound relief valve according to claim 1, it is characterised in that: the sound-absorbing material particle (24) uses
Porous ceramics is substrate, and crystalline state sound-absorbing raw material is formed on the surface of porous ceramics substrate, hole wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910214894.7A CN110056689A (en) | 2019-03-20 | 2019-03-20 | A kind of pilot operated compound relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910214894.7A CN110056689A (en) | 2019-03-20 | 2019-03-20 | A kind of pilot operated compound relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110056689A true CN110056689A (en) | 2019-07-26 |
Family
ID=67316242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910214894.7A Pending CN110056689A (en) | 2019-03-20 | 2019-03-20 | A kind of pilot operated compound relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110056689A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719657A (en) * | 2021-08-30 | 2021-11-30 | 华中科技大学 | Pressure compensation type valve core assembly, direct-acting overflow valve and pilot operated overflow valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5375812A (en) * | 1993-12-06 | 1994-12-27 | Abb Vetco Gray Inc. | Dynamic metal-to-metal seal |
| US6089575A (en) * | 1997-03-15 | 2000-07-18 | Ina Walzlager Schaeffler Ohg | Sealed seat for a hydraulic switching element in a mounting space for a direct-controlled cartridge valve in an insertion bore |
| CN203441853U (en) * | 2013-09-04 | 2014-02-19 | 安徽理工大学 | Pilot-operated type water pressure overflow valve of novel structure |
| CN104864137A (en) * | 2015-05-20 | 2015-08-26 | 安徽理工大学 | Pilot-operated type water pressure overflow valve |
| CN205479483U (en) * | 2016-02-17 | 2016-08-17 | 河北中迈机电设备有限公司 | Hydrovalve with semi -circular ring groove that appears |
-
2019
- 2019-03-20 CN CN201910214894.7A patent/CN110056689A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5375812A (en) * | 1993-12-06 | 1994-12-27 | Abb Vetco Gray Inc. | Dynamic metal-to-metal seal |
| US6089575A (en) * | 1997-03-15 | 2000-07-18 | Ina Walzlager Schaeffler Ohg | Sealed seat for a hydraulic switching element in a mounting space for a direct-controlled cartridge valve in an insertion bore |
| CN203441853U (en) * | 2013-09-04 | 2014-02-19 | 安徽理工大学 | Pilot-operated type water pressure overflow valve of novel structure |
| CN104864137A (en) * | 2015-05-20 | 2015-08-26 | 安徽理工大学 | Pilot-operated type water pressure overflow valve |
| CN205479483U (en) * | 2016-02-17 | 2016-08-17 | 河北中迈机电设备有限公司 | Hydrovalve with semi -circular ring groove that appears |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719657A (en) * | 2021-08-30 | 2021-11-30 | 华中科技大学 | Pressure compensation type valve core assembly, direct-acting overflow valve and pilot operated overflow valve |
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Application publication date: 20190726 |
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| WD01 | Invention patent application deemed withdrawn after publication |