CN202834247U - Pure water hydraulic electromagnetism unloading overflow valve - Google Patents

Pure water hydraulic electromagnetism unloading overflow valve Download PDF

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Publication number
CN202834247U
CN202834247U CN 201220451480 CN201220451480U CN202834247U CN 202834247 U CN202834247 U CN 202834247U CN 201220451480 CN201220451480 CN 201220451480 CN 201220451480 U CN201220451480 U CN 201220451480U CN 202834247 U CN202834247 U CN 202834247U
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CN
China
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valve
main valve
main
guide
seat
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CN 201220451480
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Chinese (zh)
Inventor
聂松林
潘娜
陈明辉
张小军
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北京工业大学
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Priority to CN 201220451480 priority Critical patent/CN202834247U/en
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Publication of CN202834247U publication Critical patent/CN202834247U/en

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Abstract

The utility model relates to a pure water hydraulic electromagnetism unloading overflow valve and belongs to valves. The pure water hydraulic electromagnetism unloading overflow valve is formed by a main valve, a priority valve and an electromagnetism switch valve. The main valve comprises a main valve core, a main valve seat, a main valve sleeve, a main valve spring and a main valve body. A cone valve flush end arc-shaped structure which is provided with a damping hole along the axial direction and a through hole and a secondary throttle along the radial direction is adopted by the main valve core. The radial through hole plays a role in affecting high-pressure drainage of a main stream, plays a role in balancing and centering to the valve core, and can effectively restrain cavitation. The priority valve comprises a priority valve core, a priority valve seat, a pressure adjusting spring and a priority valve body. The electromagnetism switch valve mainly comprises a reversing valve body, a flat valve core, a reversing valve seat, a reset spring, an electromagnetism component and an electromagnet. The pure water hydraulic electromagnetism unloading overflow valve is suitable for pressure control elements in middle-and-high pressure hydraulic systems which use seawater, fresh water, high water base and the like as working media, and has the advantages of being high in working pressure, wide in pressure adjusting range, good in cavitation resistant capability, low in noise, good in working stability and the like.

Description

A kind of pure water hydraulics electromagnetism unloading overflow valve

Technical field

The utility model relates to and belongs to the valve class, is a kind of pure water hydraulics electromagnetic pilot unloading overflow valve.Mainly be applicable to take off-load and the pressure regulation of seawater, fresh water, the high mesohigh water hydraulic system as working medium such as water base.Under the middle high-pressure condition, can effectively reduce leakage, cavitation erosion, vibration, the noise of valve port, and improve pressure regulation precision, increase range of regulation.This model utility is equally applicable to the strong low viscosity media of corrosivity such as seawater.

Background technique

Pure Water Hydraulic Drive Technology have environmental friendliness, purchase and user cost low, can avoid and reduce contamination of products, flame retarding, Security good, be easy to maintenance, be beneficial to advantages such as improving Green Consciousness, the parent who has been subject to countries in the world Hydraulic Industry persons looks at.The sustainable development of saving the green manufacturing of the energy, saving resource, environmental protection and labor protection becomes the primary goal of Present Mechanical Engineering development.

Aqueous medium is as hydraulic medium, the shortcoming such as exist that viscosity is low, poor lubricity, vapor pressure are high, corrosivity and electric conductivity are strong, so that existing oil pressure element can not directly or after improving apply to hydraulic pressure, fully realizing under the prerequisite of its negative effect, studying it affects mechanism, the solution of reasonable.Overcome the shortcoming of aqueous medium, give full play to its advantage.Developing highly reliable Technique for Water Hydraulic Components is stern challenge and the breakthrough that Pure Water Hydraulic Drive Technology faces.

Pure water hydraulic unload relief valve is one of crucial valve element of hydraulic system, the off-load of hydraulic system refers to that executive component (oil hydraulic cylinder, motor etc.) do not working or do not needing in the situation of whole flows, make the fluid of all or part of pump output at the dirty oil sump tank of very low pressure, make pump be in a kind of idling conditions.System unloaded can reduce power loss, can prevent again the locking system heating, thus the working life of improving pump.Because the physicochemical property of aqueous medium is different from fluid, so that the pure water hydraulic unload relief valve working stability is faced with stern challenge.

When pure water hydraulics electromagnetic pilot relief valve was worked under higher pressure condition, the valve port place had higher flow velocity, so that the local compression in valve port flow field is lower than the pressure for vaporization of water, the bubble that the water generates after the vaporization is a large amount of is cavitation phenomenon.Because the pressure for vaporization of water is high, so that easily vaporization and boiling of water electrode, thereby under identical condition, the cavitation erosion degree that pure-water hydraulic overflow valve is subject to is than the high hundreds of times of oil pressure relief valve; In addition, aqueous medium has very strong corrosivity, therefore so that existing oil pressure relief valve material all is not suitable for aqueous medium.The key technical problem that water hydraulic relief valve exists also has vibration, noise and sealing and the problem such as lubricates.Produce the reason of the problems referred to above except the reason of cavitation erosion and air pocket, also because: 1 owing to the viscosity of water is low, and viscous damping is little, and the leakage problem at valve port place is comparatively serious.The density of 2 water, modular ratio mineral oil are large, and " water hammer " phenomenon that therefore produces is serious; 3 physicochemical properties owing to water are so that erosion corrosion, galvanic corrosion, oxide etch are mainly occuring in hydrovalve in aqueous medium;

How can overcome the adverse effect that aqueous medium brings on the basis of the design experiences of traditional oils pressurized overflow valve, improve the quiet dynamic characteristic of relief valve, be the key point of pure water hydraulics electromagnetism unloading overflow valve research.

Summary of the invention

The purpose of this utility model is to provide a kind of pure water hydraulics electromagnetism unloading overflow valve, be used for improving the quiet dynamic characteristic of unloading overflow valve, realize fast response time, highly sensitive, the requirement such as the pressure regulation precision high, range of regulation is large, conveyance capacity is large, the pressure loss is little, noise is little.The use of two-step throttle structure and high-pressure induct device has reduced the impact harm that cavitation erosion brings spool in the utility model.For improving the sealing of spool and valve pocket, adopted the Che Shi combination sealing arrangement.

The utility model adopts following technological scheme to solve its technical problem:

A kind of pure water hydraulics electromagnetic pilot relief valve is comprised of a 2/2-way electromagnetic switch valve and pilot operated compound relief valve, comprises main valve, pilot valve, Water hydraulic magnetic switch valve three parts, wherein:

Main valve: comprise main valve body, main valve plug, main valve seat, main valve housing, main spool spring, Glais ring, water intake P, water outlet T.Main valve plug is contained in the main valve seat, main valve housing is contained in the outer surface of main valve plug, axial damp liquid resistance and high-pressure induct hole are radially arranged in the through hole of main valve plug, for guaranteeing that sealing realizes zero leakage, the Che Shi sealing is adopted in the sealing of main valve plug, so that the open type sealing is taked in the distortion of the resin ring of Glais ring between main valve plug and the main valve housing, namely the main valve plug last time is combined with two main valve housings in order to avoid adopting hard installation.Main valve housing one end near water intake P is connected with main valve seat, and the other end and main valve plug carry out Spielpassung.Be connected the other end away from main valve housing one end of water intake T with guide's valve seat and seal by Glais ring and main valve plug, main spool spring is contained in the spring chamber of main valve, is connected between guide's valve seat and the main valve plug.The two-step throttle structure of main valve plug, it is 15 ° the conical surface that two cone angle half-angles are namely arranged, the conical surface and valve seat form linear sealing when spool is not opened, form two variable restrictor valve ports of connecting between the conical surface and the main valve seat when main valve plug is opened, and namely realize two-step throttle.Have water intake P and backwater mouth T on the main valve body, the liquid flow point of water intake P is two, and the center hole by main valve plug, a main damping valve hole are connected with the main spool spring chamber, another be main valve plug with main valve seat between the runner that forms be communicated with backwater mouth T.Main valve body has tiny runner near the part of selector valve, and the runner that is connected with the water intake P1 of Water hydraulic magnetic switch valve is linked up by the circular groove on the main valve housing and main spool spring chamber.The runner that is communicated with the backwater mouth T1 of Water hydraulic magnetic switch valve then is connected with water outlet T by circular groove.For guaranteeing being connected with fixing of main valve body and guide valve blocks, main valve body has adopted straight mouthful of mode that is connected with guide valve blocks and has been fixed with straight pin.

Pilot valve: comprise guide valve blocks, guide's spool, guide's valve seat, pressure adjusting spring, spring seat, adjusting screw rod.Be arranged as successively spring seat, pressure adjusting spring, guide's spool, guide's valve seat in the hole of guide valve blocks.Adjusting screw rod and guide valve blocks are threaded connection and withstand on the spring seat, and pressure adjusting spring is installed between spring seat and the guide's spool, and the pilot valve seat is positioned at the side near main valve.The fluid in main spool spring chamber arrives guide's valve pocket through the center hole on guide's valve seat, and guide's spool is opened when the pilot valve cavity pressure reaches the adjusting screw rod set pressure.High pressure water flows to the water outlet T of main valve by the runner on pilot valve body and the main valve body.The guide cylinder face that has on guide's spool forms the guiding matching gap with guide valve blocks, becomes damping cavity so that place pressure adjusting spring, is not easy to form the choke-out cavity volume, has improved stationarity and the reliability of pilot valve motion.

Water hydraulic magnetic switch valve: comprise the compositions such as commutation valve body, commutation valve seat, dull and stereotyped spool, electromagnetic assembly I, water intake P1, backwater mouth T1.The selector valve body is positioned at the top of main valve body, is arranged as according to this commutation valve seat 12, dull and stereotyped spool 11, Returnning spring, electromagnetic assembly I, coil H in the commutation valve body.Runner near guide valve blocks on water intake P1 mouth and the main valve body links to each other, and the reposition force that the high pressure water that flows to water intake P1 overcomes spring promotes dull and stereotyped spool and moves upward, and high-pressure water flow is to backwater mouth T1 then.Runner near water intake P on backwater mouth T1 and the main valve body links to each other, and flows to backwater mouth T by the annular groove on the main valve housing.The commutation valve seat of switch valve is to be threaded connection to be fixed on the commutation valve body, described electromagnetic switch valve is open type, the outer cover of electromagnetic assembly I has electromagnet H, when electromagnet gets in the electric situation, the powerful electromagnetic force that produces fits tightly dull and stereotyped spool and commutation valve seat, thus the high pressure water that has cut off water intake P1.

The spring chamber of main valve is connected with the ante-chamber of pilot valve, links to each other with the water intake P1 of Water hydraulic magnetic switch valve by runner simultaneously.Main valve is inner hex screw with being connected of pilot valve, and the straight mouth processed on straight pin and the pilot valve body is fixed connection.Electromagnetic switch valve is positioned at the top of main valve body, and electromagnetic switch valve was connected and fixed with being connected by four socket head screws of main valve.

The working principle of described electromagnetic relief valve: the high pressure water that high-pressure water pump flows out flows to the ante-chamber of relief valve main valve plug through water intake P, arrive the spring chamber of main valve plug through the damping hole on the main valve plug, then arrive the ante-chamber of guide's spool, because this moment, guide's spool was in closed condition under the effect of pressure adjusting spring set pressure, high pressure water can not opened guide's spool before reaching the pressure that pilot valve sets up, the high pressure water of this moment has entered the cavity of resorption of 2/2-way selector valve along the runner of guide valve blocks, the reposition force that overcomes selector valve armature medi-spring can promote dull and stereotyped spool and move upward, make high-pressure water flow to the epicoele of selector valve, then by the runner on the change valve, runner on the main valve body flows to backwater mouth T, under the effect of damping hole, high pressure water flow so that the pressure in main spool spring chamber less than the pressure of main valve ante-chamber.The pressure reduction promotion main valve plug that produces is moved to the left then opens main valve plug, and this process is the off-load process of relief valve.When the electromagnet of selector valve gets in the electric situation, electromagnet armature is lived the sealing valve port of selector valve under the electromagnetic push effect that electromagnetic coil produces, and has disconnected the passage of selector valve.At this moment, after high pressure water arrives the spring chamber of main valve through the main damping valve hole, arrived again the ante-chamber of guide's spool by the pilot valve damping hole, when the pressure of pilot valve ante-chamber reaches the pressure of adjusting screw rod setting, guide's spool opened carry out overflow, high pressure water flows to oil return inlet T by the runner of pilot valve body.Main valve plug is opened main valve plug and then beginning overflow under the differential pressure action that damping hole produces.This process is the pressure regulation of relief valve.The setting of relief valve pressure is to adjust by the screw press of pilot valve.

Open at the center of described main valve plug can affect the high-pressure induct of main flow bundle radial direction through hole, and main valve plug is the two-step throttle structure that establishment cavitates, reduces noise, reduces to vibrate, damping hole on guide's spool is connected with the resistance of the liquid of main valve plug, setting-pressure accuracy that can the Effective Raise relief valve, thus the relief valve working stability improved.For the sealing that improves main valve plug realizes zero leakage, Che Shi sealing (being the Glais ring sealing) is adopted in the sealing of main valve plug and main valve housing, for ease of the installation of Glais ring, so main valve housing is designed to two-part.

Described main valve plug and main valve housing adopt the sealing of combination sealing arrangement Glais ring, and main valve body and main valve seat adopt the O RunddichtringO to seal, and left main valve housing and main valve body adopt the O RunddichtringO to seal, and guide valve blocks and main valve body adopt the O RunddichtringO to seal.Guide's valve seat and guide valve blocks adopt the O RunddichtringO to seal, spring seat and guide valve blocks adopt the O RunddichtringO to seal, commutation valve body and main valve body adopt the O RunddichtringO to seal, and relief valve adopts the O RunddichtringO to seal with the sealing of experiment cover plate.

The material of described main valve body, guide valve blocks, commutation valve body all adopts 1Cr18Ni9Ti, the material of main valve plug, guide valve core, changeover valve core all adopts Precipitation-hardening Stainless Steel 17-4PH, the material of main valve seat, main valve housing, guide valve seat, commutation valve seat all adopts aluminum bronze QAL9-4, and it is the spring wire material of 3J1 that main spool spring, pilot valve pressure adjusting spring, selector valve Returnning spring all adopt the trade mark.

The utility model is compared with background technique, and the beneficial effect that has is:

1, main valve plug has adopted two-step throttle structure and high-pressure induct structure, can effectively suppress cavitation erosion, reduce noise, reduces vibration.During main valve open, form two variable restrictor valve ports of connecting between main valve plug and the main valve housing, so that the pressure drop of relief valve in main valve born by two settable orifices, thereby improved the working pressure of unloading overflow valve and the stability of unloading overflow valve.The sealing of Che Shi Glais ring is adopted in the sealing of main valve plug and main valve housing, for the reliability that improves sealing and the installation of being convenient to Glais ring, main valve housing is designed to two-part.

2, have the guide cylinder face on guide's spool, the valve body of itself and pilot valve forms the guiding matching gap, so that the cavity volume of Regulation spring becomes damping cavity, is not easy to form the choke-out cavity volume, improved the pilot valve motion steadily and reliability.

3, Water hydraulic magnetic switch valve adopts small flow 2/2-way selector valve, and valve seat is threaded fixing with the valve body employing, and dull and stereotyped spool contacts and the break-make of leaving realization liquid stream with valve seat, has realized zero leakage.The opening amount of selector valve is to be determined by the stroke of dull and stereotyped spool.Small flow open type selector valve, spool stroke is short, greatly reduces opening and resetting time of electromagnetic switch valve, has improved the speed of reaction.

4, main valve plug and main valve housing adopt the sealing of combination sealing arrangement Glais ring, between main valve body and the main valve seat, between left main valve housing and the valve body, between guide valve blocks and the main valve body, between guide's valve seat and the guide valve blocks, between spring seat and the commutation valve body, between commutation valve body and the main valve body, all adopt the O RunddichtringO directly to seal between relief valve and the experiment cover plate, efficiently solve pure water hydraulic unload relief valve and leak serious problem, the reasonable Arrangement of pure water electromagnetic switch valve runner is so that the suffered fluid pressure balance of dull and stereotyped spool, can the safety action flexibility and reliability, be applicable to the working environment of mesohigh.

5, through testing at friction wear testing machine, pure water hydraulics electromagnetic pilot unloading overflow valve is carried out selection, select the high material of hardness can effectively overcome the generation of cavitation erosion etc., the working life of improving relief valve.

6, the utility model is simple in structure, can realize that off-load can carry out pressure regulation again, and reliability is high, is easy to standardized design feature, is applicable to carry out work under the working environment of mesohigh.

Description of drawings:

Fig. 1 is structural principle schematic representation of the present utility model.

Fig. 2 is the structure principle chart of Water hydraulic magnetic switch valve in the utility model.

Fig. 3 is main valve housing structural drawing in the utility model.

Fig. 4 is the main valve plug structural drawing with secondary structure.

Among the figure: 1, adjusting screw rod, 2, hexagon nut, 3, the O RunddichtringO, 4, spring seat, 5, the pilot valve pressure adjusting spring, 6, guide valve core, 7, guide valve seat, 8, the pilot valve body, 9, main valve body, 10, water intake P, 11, electromagnetic coil H, 12, electromagnetic assembly I, 13, changeover valve core, 14, the commutation valve seat, 15, water outlet T1,16, the commutation valve body, 17, Glais ring, 18, main valve housing, 19, main valve seat, 20, water intake P, 21, main valve plug, 22, water outlet T, 23, main spool spring, 24, socket head screw, 25, straight pin.

Embodiment

As shown in Figure 1, a kind of pure water hydraulics electromagnetic pilot relief valve is comprised of a 2/2-way electromagnetic switch valve and pilot operated compound relief valve, comprises main valve, pilot valve, Water hydraulic magnetic switch valve three parts, it is characterized in that:

Main valve: comprise main valve body 9, main valve plug 21, main valve seat 19, main valve housing 18, main spool spring 23, Glais ring 17, water intake P, water outlet T.Main valve plug 21 is contained in the main valve seat 19, main valve housing 18 is contained in the outer surface of main valve plug 21, axial damp liquid resistance and high-pressure induct hole are radially arranged in the through hole of main valve plug 21, for guaranteeing that sealing realizes zero leakage, the Che Shi sealing is adopted in the sealing of main valve plug 21, so that the open type sealing is taked in the distortion of the resin ring of Glais ring between main valve plug and the main valve housing, namely be combined with according to this two main valve housings for avoiding adopting hard installation on the main valve plug.Main valve housing 18 1 ends near water intake P are connected with main valve seat 19, and the other end and main valve plug 21 carry out Spielpassung.Be connected the other end away from main valve housing 18 1 ends of water intake T with guide's valve seat and seal by Glais ring and main valve plug, main spool spring 23 is contained in the spring chamber of main valve 9, is connected between guide's valve seat and the main valve plug.The two-step throttle structure of main valve plug 21, it is 15 ° the conical surface that two cone angle half-angles are namely arranged, the conical surface and valve seat 19 form linear sealing when spool is not opened, form two variable restrictor valve ports of connecting between the conical surface and the main valve seat when main valve plug is opened, and namely realize two-step throttle.Have water intake P and backwater mouth T on the main valve body 9, the liquid flow point of water intake P is two, center hole by main valve plug 21, a main damping valve hole are connected with the main spool spring chamber, another be main valve plug 21 with main valve seat 19 between the runner that forms be communicated with backwater mouth T.Main valve body 9 has tiny runner near the part of selector valve, and the runner that the water intake P1 of Water hydraulic magnetic switch valve connects is linked up by the circular groove on the main valve housing and main spool spring chamber.The runner that is communicated with the backwater mouth T1 mouth of Water hydraulic magnetic switch valve then is connected with water outlet T by circular groove.For guaranteeing being connected with fixing of main valve body 9 and guide valve blocks 8, main valve body 9 has adopted straight mouthful of mode that is connected with guide valve blocks 8 and has been fixed with straight pin.

Pilot valve: comprise guide valve blocks 8, guide's spool 6, guide's valve seat 7, pressure adjusting spring 5, spring seat 4, adjusting screw rod 1.Be furnished with successively spring seat 4, pressure adjusting spring 5, guide's spool 6, guide's valve seat 7 in the hole of guide valve blocks.Adjusting screw rod 1 is threaded connection with guide valve blocks 8 and withstands on the spring seat 4, and pressure adjusting spring 5 is installed between spring seat 4 and the guide's spool 6, and the pilot valve seat is positioned at the side near main valve.The fluid in main spool spring chamber arrives guide's valve pocket through the center hole on guide's valve seat 7, and guide's spool is opened when the pilot valve cavity pressure reaches the adjusting screw rod set pressure.High pressure water flows to the water outlet T of main valve by the runner on pilot valve body 8 and the main valve body 9.The guide cylinder face that has on guide's spool 6 forms the guiding matching gap with guide valve blocks, becomes damping cavity so that place the cavity volume of Regulation spring, is not easy to form the choke-out cavity volume, has improved stationarity and the reliability of pilot valve motion.

Water hydraulic magnetic switch valve: comprise the compositions such as commutation valve body 13, commutation valve seat 12, dull and stereotyped spool 11, electromagnetic assembly I, water intake P1, backwater mouth T1.Commutation valve body 13 is positioned at the top of main valve body 9, is arranged as according to this commutation valve seat 12, dull and stereotyped spool 11, Returnning spring, electromagnetic assembly I, coil H in the commutation valve body.Runner near guide valve blocks on water intake P1 mouth and the main valve body 9 links to each other, and the reposition force that the high pressure water that flows to water intake P1 overcomes spring promotes dull and stereotyped spool and moves upward, and high-pressure water flow is to backwater mouth T1 then.Runner near water intake P on backwater mouth T1 and the main valve body 9 links to each other, and flows to backwater mouth T by the annular groove on the main valve housing.The commutation valve seat of switch valve is to be threaded connection to be fixed on the commutation valve body, described electromagnetic switch valve is open type, the outer cover of electromagnetic assembly I has electromagnet H, when electromagnet gets in the electric situation, the powerful electromagnetic force that produces fits tightly dull and stereotyped spool and commutation valve seat, thus the high pressure water that has cut off water intake P1.

Open at the center of described main valve plug can affect the high-pressure induct of main flow bundle radial direction through hole, and the two-step throttle structure that main valve plug 21 cavitates, reduces noise, reduces to vibrate for establishment, damping hole on guide's spool 6 is connected with the liquid resistance of main valve plug 21, setting-pressure accuracy that can the Effective Raise relief valve, thus the stability of relief valve work improved.For the sealing that improves main valve plug realizes zero leakage, main valve plug 21 adopts Che Shi sealing (being the Glais ring sealing) with the sealing of main valve housing 18, for ease of the installation of Glais ring 17, so main valve housing 18 is designed to two-part.

Described main valve plug 21 adopts 17 sealings of combination sealing arrangement Glais ring with main valve housing 18, main valve body 9 adopts O RunddichtringO 3 to seal with main valve seat 18, left main valve housing 18 adopts O RunddichtringO 3 to seal with main valve body 9, and guide valve blocks 8 adopts O RunddichtringO 3 to seal with main valve body 9.Guide's valve seat 7 adopts O RunddichtringO 3 to seal with guide valve blocks 8, spring seat 4 and guide valve blocks 8 adopt O RunddichtringO 3 to seal, commutation valve body 16 adopts O RunddichtringO 3 to seal with main valve body 9, and relief valve adopts the O RunddichtringO to seal with the sealing of experiment cover plate.

The working pressure of this valve is 14MPa, and maximum service pressure is 16MPa, 160L/min during rated flow, and the pressure overshoot amount is not more than 20%, and the pressure adjustment time is not more than 60ms.

Electromagnetic switch valve of the present utility model is a kind of type of often opening, in the cold situation of electromagnet, flow to the high pressure oil of oil inlet P 1, in the situation of the reposition force that has overcome spring, can realize the separating of valve port of dull and stereotyped spool and valve seat, high pressure water arrives the water outlet T1 of selector valve, then with through-flow to oil return inlet T by the annular groove on the main valve body.When electromagnet gets in the electric situation, the powerful electromagnetic force that electromagnet produces is blocked dull and stereotyped spool and valve port, has cut off flowing of liquid, and selector valve at this moment converts closed condition to by original opening state.

This valve adopts socket head screw to connect main valve body 9 and guide valve blocks 8, main valve seat 19 is contained in the center of main valve body 9, main valve plug 21 is contained on the main valve seat 19, right main valve housing 18 is enclosed within on the main valve seat 19, left main valve housing 18 installs Glais ring 17 and directly is enclosed within on the main valve plug 21, the lower end of main valve body 9 has water intake P and water outlet T, both link up in the situation that main valve plug 21 is opened, what intake-outlet adopted is gasket mounted mode, sealing entery and delivery port when the O RunddichtringO is used for board-like connection.Main valve plug 21 is that Glais ring 17 seals with the sealing that left main valve housing 18 forms with combined seal ring, and the form that adopts this combination sealing arrangement directly to seal is good in high pressure water ambient condition lower seal performance.The settable orifice of two series connection that form between main valve plug 21 and the main valve seat 19 is so that the pressure reduction of valve port by two restriction shareds, has reduced the occurrence condition of cavitation erosion and cavitation.The high-pressure induct hole that main valve plug 21 is opened can utilize the effect of high-pressure induct effectively to reduce noise, suppresses cavitation erosion, reduces to vibrate and main valve plug is played the effect of a balance centering, is that main valve plug is not prone to stuck phenomenon when opening closure.

Claims (4)

1. a pure water hydraulics electromagnetic pilot relief valve is comprised of a 2/2-way electromagnetic switch valve and pilot operated compound relief valve, comprises main valve, pilot valve, Water hydraulic magnetic switch valve three parts, it is characterized in that:
Main valve: comprise main valve body (9), main valve plug (21), main valve seat (19), main valve housing (18), main spool spring (23), Glais ring (17), water intake P, water outlet T; Main valve plug (21) is contained in the main valve seat (19), and main valve housing (18) is contained in the outer surface of main valve plug (21), and axial damp liquid resistance and high-pressure induct hole are radially arranged in the through hole of main valve plug (21), and the Che Shi sealing is adopted in the sealing of main valve plug (21); Take open type to install between main valve plug (21) and the main valve housing (18), namely main valve plug (21) last time is combined with two main valve housings (18); Main valve housing (18) one ends near water intake P are connected with main valve seat (19), and the other end and main valve plug (21) carry out Spielpassung.Be connected the other end away from main valve housing (18) one ends of water intake T with guide's valve seat and seal by Glais ring and main valve plug, main spool spring (23) is contained in the spring chamber of main valve (9), is connected between guide's valve seat (7) and the main valve plug (21); Have water intake P and backwater mouth T on the main valve body (9), the liquid flow point of water intake P is two, center hole by main valve plug (21), a main damping valve hole are connected with the main spool spring chamber, another be main valve plug (21) with main valve seat (19) between the runner that forms be communicated with backwater mouth T; Main valve body (9) has tiny runner near the part of selector valve, and the runner that is connected with the water intake P1 of Water hydraulic magnetic switch valve is linked up by the circular groove on the main valve housing and main spool spring chamber; The runner that is communicated with the backwater mouth T1 of Water hydraulic magnetic switch valve then is connected with water outlet T by circular groove,
Pilot valve: comprise guide valve blocks (8), guide's spool (6), guide's valve seat (7), pressure adjusting spring (5), spring seat (4), adjusting screw rod (1); Be furnished with successively spring seat (4), pressure adjusting spring (5), guide's spool (6), guide's valve seat (7) in the hole of guide valve blocks (8); Adjusting screw rod (1) is threaded connection with guide valve blocks (8) and withstands on the spring seat (4), and pressure adjusting spring (5) is installed between spring seat (4) and the guide's spool (6), and guide's valve seat (7) is positioned at the side near main valve; The fluid in main spool spring chamber arrives guide's valve pocket through the center hole on guide's valve seat (7), and guide's spool (6) is opened when the pilot valve cavity pressure reaches adjusting screw rod (1) set pressure; High pressure water flows to the water outlet T of main valve by the runner on guide valve blocks (8) and the main valve body (9); The guide cylinder face that has on guide's spool (6) forms the guiding matching gap with guide valve blocks (8), becomes damping cavity so that place the cavity volume of pressure adjusting spring (5); Water hydraulic magnetic switch valve: comprise commutation valve body (13), commutation valve seat (12), dull and stereotyped spool (11), electromagnetic assembly I, water intake P1, backwater mouth T1.Commutation valve body (13) is positioned at the top of main valve body (9), is arranged as according to this commutation valve seat (12), dull and stereotyped spool (11), Returnning spring, electromagnetic assembly I, coil H in the commutation valve body; Water intake P1 mouth links to each other with the upper runner near guide valve blocks (8) of main valve body (9); Backwater mouth T1 links to each other with the upper runner near water intake P of main valve body (9), communicates with the backwater mouth T of main valve by the annular groove on the main valve housing (18); The commutation valve seat (12) of switch valve is threaded connection and is fixed on the commutation valve body (13), described electromagnetic switch valve is open type, the outer cover of electromagnetic assembly I has electromagnet H, when electromagnet H gets in the electric situation, the electromagnetic force that produces is fitted dull and stereotyped spool (11) and commutation valve seat (12), cuts off the high pressure water of water intake P1;
The spring chamber of main valve is connected with the ante-chamber of pilot valve, links to each other with the water intake P1 of Water hydraulic magnetic switch valve by runner simultaneously.
2. a kind of electromagnetic pilot water hydraulic relief valve according to claim 1, it is characterized in that: main valve plug (21) adopts combination sealing arrangement Glais ring (17) sealing with main valve housing (18), main valve body (9) adopts O RunddichtringO (3) to seal with main valve seat (19), left main valve housing (18) adopts the O RunddichtringO to seal with main valve body (9), guide valve blocks (8) adopts the O RunddichtringO to seal with main valve body (9), guide's valve seat (7) adopts the O RunddichtringO to seal with guide valve blocks (8), spring seat (4) and guide valve blocks (8) adopt the O RunddichtringO to seal, commutation valve body (16) adopts the O RunddichtringO to seal with main valve body (9), and relief valve adopts the O RunddichtringO to seal with the sealing of experiment cover plate.
3. a kind of electromagnetic pilot water hydraulic relief valve according to claim 1, it is characterized in that: the two-step throttle structure of main valve plug (21), it is 15 ° the conical surface that two cone angle half-angles are namely arranged, the conical surface and valve seat (19) form linear sealing when main valve plug (21) is opened, form two variable restrictor valve ports of connecting between the conical surface and the main valve seat when main valve plug (21) is opened, namely realize two-step throttle.
4. a kind of electromagnetic pilot water hydraulic relief valve according to claim 1 is characterized in that: main valve body (9) and guide valve blocks (8) have adopted mode that straight mouth is connected and have been fixed with straight pin.
CN 201220451480 2012-09-05 2012-09-05 Pure water hydraulic electromagnetism unloading overflow valve CN202834247U (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103591350A (en) * 2013-11-04 2014-02-19 中国民航大学 Pilot operated overflow valve for aircraft deicing fluid
CN103615570A (en) * 2013-11-21 2014-03-05 北京工业大学 Two-position three-way electromagnetic reversing valve for deep-sea collection
CN103867759A (en) * 2014-02-10 2014-06-18 龙工(上海)精工液压有限公司 One-way overflow valve capable of preventing overhigh pressure of plunger pump case
CN104265716A (en) * 2014-10-23 2015-01-07 西华大学 Ultrahigh pressure pilot operated relief valve
CN104315158A (en) * 2014-10-09 2015-01-28 盐城百圣机械有限公司 Fluid valve capable of being automatically opened and closed
CN104728431A (en) * 2015-03-31 2015-06-24 中国船舶重工集团公司第七一一研究所 Electromagnetic control valve with adjustable voltage and speed adjusting variable torque transmission device hydraulic system adopting same
CN104896141A (en) * 2014-03-08 2015-09-09 温州益坤电气有限公司 High-oil-pressure and large-drift-diameter combined reversing valve for electric high-voltage switch hydraulic mechanism
CN105020190A (en) * 2014-04-30 2015-11-04 张凯 Straight-moving guide control mechanism in valve core and fluid control valve
WO2017193855A1 (en) * 2016-05-10 2017-11-16 比亚迪股份有限公司 Expansion switch valve
CN107620820A (en) * 2017-11-23 2018-01-23 王雅莲 A kind of adjustable overflow reversal valve calibrated automatically
CN109185253A (en) * 2018-10-22 2019-01-11 陈少同 A kind of electromagnetic relief valve

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103591350B (en) * 2013-11-04 2015-11-18 中国民航大学 A kind of pilot-type relief valve for airplane deicing
CN103591350A (en) * 2013-11-04 2014-02-19 中国民航大学 Pilot operated overflow valve for aircraft deicing fluid
CN103615570A (en) * 2013-11-21 2014-03-05 北京工业大学 Two-position three-way electromagnetic reversing valve for deep-sea collection
CN103867759A (en) * 2014-02-10 2014-06-18 龙工(上海)精工液压有限公司 One-way overflow valve capable of preventing overhigh pressure of plunger pump case
CN104896141A (en) * 2014-03-08 2015-09-09 温州益坤电气有限公司 High-oil-pressure and large-drift-diameter combined reversing valve for electric high-voltage switch hydraulic mechanism
CN105020190A (en) * 2014-04-30 2015-11-04 张凯 Straight-moving guide control mechanism in valve core and fluid control valve
CN104315158A (en) * 2014-10-09 2015-01-28 盐城百圣机械有限公司 Fluid valve capable of being automatically opened and closed
CN104315158B (en) * 2014-10-09 2016-08-17 盐城百圣机械有限公司 A kind of can the Fluid valve of automatic shutter
CN104265716A (en) * 2014-10-23 2015-01-07 西华大学 Ultrahigh pressure pilot operated relief valve
CN104728431A (en) * 2015-03-31 2015-06-24 中国船舶重工集团公司第七一一研究所 Electromagnetic control valve with adjustable voltage and speed adjusting variable torque transmission device hydraulic system adopting same
CN104728431B (en) * 2015-03-31 2017-03-08 中国船舶重工集团公司第七一一研究所 Pressure-adjustable solenoid electric valve and adopt its speed governing bending moment actuating device hydraulic system
WO2017193855A1 (en) * 2016-05-10 2017-11-16 比亚迪股份有限公司 Expansion switch valve
CN107620820A (en) * 2017-11-23 2018-01-23 王雅莲 A kind of adjustable overflow reversal valve calibrated automatically
CN107620820B (en) * 2017-11-23 2019-01-08 中宁县鑫杞航农业发展有限公司 A kind of adjustable overflow reversal valve calibrated automatically
CN109185253A (en) * 2018-10-22 2019-01-11 陈少同 A kind of electromagnetic relief valve
CN109185253B (en) * 2018-10-22 2020-04-21 杭州诚臻工程机械有限公司 Electromagnetic overflow valve

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