CN208519189U - A kind of motor-driven valve - Google Patents

Abstract

The utility model discloses a kind of motor-driven valve, including valve component, the valve component includes valve port portion；Core assembly, the core assembly can be moved axially relative to the valve port portion, the core assembly includes spool and sealing ring, the spool includes flow control portion, the flow control portion includes annular groove section and taper portion, the taper portion is set to the lower section of the annular groove section, and the seal ring set is set to the annular groove section；The sealing ring can cooperate with the valve port portion to close the motor-driven valve, and the taper portion can cooperate with the valve port portion to adjust the flow of the motor-driven valve.The connection type of the motor-driven valve of the utility model, sealing ring and spool is simple, and the invention also discloses the simple motor-driven valves of the connection type of another sealing ring and spool.

Description

A kind of motor-driven valve

Technical field

The utility model relates to fluid control technology fields, more particularly to a kind of motor-driven valve.

Background technique

Significant components of the motor-driven valve as composition refrigeration system are widely used in freezing unit, freezer, supermarket's refrigerator etc.. Motor-driven valve generallys include valve component, driving assembly, screw component, core assembly, makes silk by the rotation driving of driving assembly Bar assembly acts on core assembly, so that core assembly be made to abut or separate the valve port portion of motor-driven valve, realizes the flow of motor-driven valve Regulatory function.A kind of motor-driven valve of background technique includes core assembly and valve body, and valve body includes valve port portion.Core assembly packet Valve rod, sealing element and fixing piece are included, sealing element can cooperate with valve port portion, so that motor-driven valve opens or closes.When assembly, sealing The top of part self-retaining part is mounted on the peripheral part of fixing piece, then by the upper end of fixing piece be inserted into valve rod lower end and with valve rod riveting Pressure, completes the assembly of sealing element, the assembly of sealing element is more complex.

Utility model content

The purpose of the application is to provide a kind of motor-driven valve, and the connection type of sealing ring and spool is simple.

A kind of motor-driven valve provided by the present application, comprising: valve component, the valve component include valve port portion；Core assembly, The core assembly can be moved axially relative to the valve port portion, and the core assembly includes spool and sealing ring, the valve Core includes flow control portion, and the flow control portion includes annular groove section and taper portion, and the taper portion is set to the ring The lower section in connected in star portion, the seal ring set are set to the annular groove section；The sealing ring can cooperate with the valve port portion To close the motor-driven valve, the taper portion can cooperate with the valve port portion to adjust the flow of the motor-driven valve.

The motor-driven valve of the technical program, spool include flow control portion, and flow control portion includes annular groove section and cone cell Portion, taper portion are set to the lower section of annular groove section, and seal ring set is set to annular groove section, the connection type of sealing ring and spool Simply.

Disclosed herein as well is another motor-driven valves, comprising: valve component, the valve component include valve port portion；Spool Component, the core assembly can be moved axially relative to the valve port portion, and the core assembly includes spool and sealing ring, institute Stating spool includes flow control portion, and the flow control portion includes columnar part and taper portion, and the taper portion is set to the column The lower section in shape portion, the sealing ring are moulded in the peripheral part of the columnar part by injection molding manner, and the sealing ring can be with institute The cooperation of valve port portion is stated to close the motor-driven valve, the taper portion can cooperate with the valve port portion to adjust the motor-driven valve Flow.

The motor-driven valve of the technical program, spool include flow control portion, and flow control portion includes columnar part and taper portion, cone Shape portion is set to the lower section of columnar part, and the sealing ring is moulded in the peripheral part of the columnar part, sealing ring by injection molding manner It is simple with the connection type of spool.

Detailed description of the invention

Fig. 1 show structural schematic diagram of the motor-driven valve of the utility model embodiment one under a certain valve opening state；

Fig. 2A show the three-dimensional structure diagram of Fig. 1 middle (center) bearing；

Fig. 2 B show the top view of bearing shown in Fig. 2A；

Fig. 2 C show the diagrammatic cross-section of bearing shown in Fig. 2A；

Fig. 3 show the partial schematic diagram of Fig. 1；

Fig. 4 show motor-driven valve shown in Fig. 1 in closed valve state partial schematic diagram for the moment；

Fig. 5 show partial schematic diagram of the motor-driven valve shown in Fig. 1 in closed valve state two；

Fig. 6 A show the structural schematic diagram of the motor-driven valve of the utility model embodiment two；

Fig. 6 B show the partial schematic diagram of Fig. 6 A；

Fig. 7 show the structural schematic diagram of the motor-driven valve of the utility model embodiment three.

Specific embodiment

It needs first to illustrate, the noun of locality used herein, such as "up" and "down", is attached with this paper specification It is defined on the basis of shown position in figure, related " axial direction " refers to the axis direction of motor-driven valve herein, specifically, such as along electricity The axis direction of the valve core housing of dynamic valve." radial direction " involved in herein refers to the side vertical with the axial direction of aforementioned motor-driven valve To.It should be appreciated that the use of the noun of locality is intended merely to the clear of description technique scheme and conveniently, it should not be to protection scope It is construed as limiting.

Herein referred " soft sealing material " refers to nonmetallic materials, and has the sealing that can be used in of certain elasticity Material.

Herein referred " taper portion can cooperate with the valve port portion of valve component ", including taper portion contacted with valve port portion with It closes motor-driven valve or adjusts the structure of the flow of motor-driven valve；It further include that taper portion is not contacted with valve port portion, by controlling taper portion The structure of the flow of motor-driven valve is adjusted relative to the axial movement in valve port portion.

It is with reference to the accompanying drawing and specific real in order to make those skilled in the art of the present technique more fully understand technical scheme It applies example to be further described technical scheme, especially mainly the core utility model point of technical scheme is made It is described in detail out.

Fig. 1 show structural schematic diagram of the motor-driven valve of embodiment one under a certain valve opening state, and Fig. 2A is shown in Fig. 1 The three-dimensional structure diagram of bearing, Fig. 2 B show the top view of bearing shown in Fig. 2A, and Fig. 2 C show bearing shown in Fig. 2A Diagrammatic cross-section, Fig. 3 show the partial schematic diagram of Fig. 1, and Fig. 4 show motor-driven valve shown in Fig. 1 in closed valve state office for the moment Portion's schematic diagram, Fig. 5 show partial schematic diagram of the motor-driven valve shown in Fig. 1 in closed valve state two.

As shown in Figure 1, the motor-driven valve of the present embodiment includes the valve component 10 with valve chamber 100, it further include screw component 20, core assembly 30, nut assembly 40, rotor assembly 50, elastic element 60, electromagnetic coil 70.Valve component 10 includes spool Set 13, core assembly 30 include spool 31, and spool 31 is at least partially disposed at the inner cavity of valve core housing 13, the outer wall energy of spool 31 Enough and valve core housing 13 inner wall clearance sliding fit, core assembly 30, can be relative to spool under the drive of screw component 20 13 axial movement of set, screw component 20 includes screw rod 21 and bearing 22, and bearing 22 is sheathed on the lower end 213 of screw rod 21, bearing 22 include bearing inner ring 221 and outer race 222, and bearing inner ring 221 can be circumferentially rotated relative to outer race 222.Spool 31 include holding tank 312 and taper portion 325, and taper portion 325 is set to the lower section of holding tank 312, and the taper portion 325 can be with The valve port portion 200 of valve component cooperates to adjust the flow of motor-driven valve, when motor-driven valve is closed, holding tank 312 and taper portion 325 Lower end be not connected to, that is, taper portion 325 is set to holding tank 312, elastic element in axial non-through setting, elastic element 60 60 upper end is abutted with outer race 222, and the lower end of elastic element 60 is abutted with spool 31.Elastic element 60 can be specially to press Contracting spring.

The motor-driven valve of the technical program, during screw rod 21 is circumferentially rotated and is moved axially, outer race 222 relative to Spool 31 does not circumferentially rotate, and the upper end of elastic element 60 is abutted with outer race 222, the lower end of elastic element 60 and spool 31 abut, and therefore, core assembly 30 is not circumferentially rotated relative to valve port portion 200, is reduced spool 31 and is connect with valve port portion 200 The frictional force that contact portion position is subject to reduces the abrasion that spool 31 and 200 contact site of valve port portion are subject to, can reduce motor-driven valve Internal leakage improves airtight performance when motor-driven valve valve closing.

Specifically, as shown in Figure 1, nut assembly 40 includes nut 41, spring guide rail 42, stop slip ring 43 and bulge loop 44. Wherein, the internal screw thread of nut 41 can cooperatively form screw part with the outer nut of screw rod 21.Bulge loop 44 is arranged in nut 41 Nut 41 is simultaneously connect by periphery with lower valve body 12.Nut 41 and bulge loop 44 can injection moldings or solid otherwise together Fixed, the excircle on 41 top of nut is set with spring guide rail 42 and stop slip ring 43.Rotor assembly 50 includes rotor 51, arresting lever 52 and connection ring connecting the two 53, rotor 51 is fixedly connected with the upper end of screw rod 21 by connection ring 53.When rotor assembly 50 When screw rod 21 being driven to rotate, nut assembly 40 can convert linear motion for the rotation of screw rod 21, and then make screw component 20 It is able to drive the axial movement of core assembly 30.

Valve component 10 includes upper valve body 11, lower valve body 12, valve core housing 13, the first connecting tube 14.Specifically, upper valve body 11 Form valve chamber 100 after being welded and fixed with lower valve body 12, be connected with the first adapter tube 14 on the side wall of lower valve body 12, the first adapter tube 14 and Cavity 100 is connected to.Valve core housing 13 is fixedly connected with lower valve body 12.The upper end of valve core housing 13 is inserted into the inner hole of 41 lower end of nut In.

In the present embodiment, both valve core housing 13 and lower valve body 12 are split type structure, can be with by being pressed or being welded and fixed Understand, valve core housing 13 and lower valve body 12 may be integral structure, that is, be processed as a part.13 lower end of valve core housing It stretches out valve chamber 100 and is connected with the second adapter tube 15, that is, valve core housing 13 is partially provided in valve chamber 100 in the present embodiment, Valve core housing 13 with other components assembling before, substantially in axially through tubular structure, valve core housing 13 include inner cavity 131, this In embodiment, inner cavity 131 is surrounded by the internal groove side wall of valve core housing 13.The inner wall of valve core housing 13 can move the axial direction of core assembly 30 Dynamic to provide guiding role, valve core housing 13 offers valve port portion 200, and valve port portion 200 is generally located in valve chamber 100.Specifically, spool Set 13 be provided with to 21 direction of screw rod it is axially extending in axially through annular convex platform 133, annular convex platform 133 formed valve port portion 200, design is advantageous in that in this way, and since valve core housing 13 is fixedly connected with lower valve body 12, valve core housing 13 is provided with valve port portion again 200, it is easier to improve the concentricity of the cooperation of valve port portion 200 and spool 31.

As shown in Figure 1 to Figure 3, screw component 20 includes screw rod 21, bearing 22.In the present embodiment, bearing 22 is set to appearance Receive slot 312.Bearing 22 includes bearing inner ring 221, outer race 222.The two can relatively rotate circumferentially.Outer race 222 outer wall can be relative to the cell wall clearance sliding fit of holding tank 312.Screw rod 21 includes the lower end cooperated with bearing 22 213 and it is set to the main part 212 of the top of lower end 213.Bearing 22 is sheathed on the outside of lower end 213.Outside main part 212 Wall is provided with external thread part, and the lower end surface of main part 212 and the periphery wall of lower end 213 form step surface first step directed downwardly The upper end in portion 211, bearing inner ring 221 is abutted with first step portion 211, and 213 riveting fixing bearing inner ring 221 of lower end makes silk Bar 21 is connect with bearing inner ring 221, that is, bearing inner ring 221 can move axially together with screw rod 21.Screw rod 21 and bearing inner ring 221 this fixed form simple process, it is convenient.When bearing inner ring 221 moves axially together with screw rod 21, outer race 222 do not circumferentially rotate relative to spool 31.In the present embodiment, bearing 22 is specially ball bearing, and ball 223 is set to axis It holds between inner ring 221 and outer race 222.It is understood that when bearing 22 uses different connection types from screw rod 21, Axially opposing displacement or circumferentially opposed rotation may occur between screw rod 21 and bearing 22, this does not influence the realization of this programme.

As shown in figures 1 and 3, core assembly 30 further includes sealing ring 33 made of retaining ring 32 and soft sealing material.It is close Seal ring 33 is mounted on spool 31.Spool 31 is at least partially disposed in the inner cavity 131 of valve core housing 13, the outer wall energy of spool 31 Enough and valve core housing 13 inner wall clearance sliding fit.Match since the outer wall of spool 31 can be slided with the inner wall gap of valve core housing 13 Close, during screw rod 21 is circumferentially rotated and is moved axially relative to valve core housing 13, due to spool 31 relative to valve core housing 13 not It circumferentially rotates, can only move axially, radial frictional force does not occur between spool 31 and valve core housing 13, valve can be made The movement of core 13 is more steady.According to the variation of 13 structure of valve core housing, valve core housing can also be stretched out or not stretched out in the lower end of spool 31 13。

Spool 31 can be specially brass material, as shown in figure 4, spool 31 includes holding tank 312 and taper portion 325, cone Shape portion 325 is set to the lower section of holding tank 312, during screw component 20 drives core assembly 30 to move axially, taper portion 325 can cooperate with valve port portion 200 to adjust the flow of motor-driven valve.Before assembling, 312 upper end of holding tank is in opening for spool 31 Shape, for the loading of other components.The upper end of spool 31 can pass through the modes such as welding, interference press-fitting and the fixed company of retaining ring 32 It connects, so that core assembly 30 can cooperate with screw component 20, screw component 20 is made to be able to drive the axial movement of core assembly 30.

In the present embodiment, specifically, the upper end of spool 31 is provided with the face-up second step portion 311 of step, retaining ring After 32 are arranged in the step in second step portion 311, the upper end of spool 31 and 32 riveting of retaining ring cooperate.The lower end 213 of screw rod 21, Bearing 22 and elastic element 60 are set in holding tank 312.After the bearing 22 and retaining ring 32 of screw component 20 contact, if screw rod The continuation of component 20 is moved axially upward, then screw component 20 is able to drive spool 31 and moves axially upwards, and makes core assembly 30 (not contacting) is disengaged with valve port portion 200.It is understood that be not provided with retaining ring 32 also possible for core assembly 30, at this moment, only The upper end of spool 31 is radially bent to form bending part to the direction of screw rod 21, is cooperated using bending part and bearing 22, Move axially upwards screw component 20 with movable valve plug 31 also possible.

As further design, sealing ring 33 can have the soft sealing material of similar performance to be made by PTFE etc., In this way, sealing element 33 can be installed on spool 31 by way of being arranged.Under the drive of screw component 20, sealing ring 33 Lower end surface can be abutted with valve port portion 200 (annular convex platform 131), so that motor-driven valve is closed.

As a kind of specific embodiment, spool 31 specifically includes cylindrical portion 313 and the flow control positioned at 313 lower section of cylindrical portion Portion 314 processed, holding tank 312 are set in cylindrical portion 313.Wherein, in the present embodiment, sealing ring 33 is set in flow control portion 314 peripheral part.Sealing ring 33 and the connection type of spool 31 are simple, without other components are added on motor-driven valve, in electricity When dynamic valve other structures are constant, it is further simplified the structure of motor-driven valve, structure is simple.

Specifically, as shown in figure 4, flow control portion 314 includes annular groove section 315 and taper portion 325, annular groove section 315 are set to the top of taper portion 325, and the cross section of the outer wall of annular groove section 315 is generally circular, and taper portion 325 is presented Small pyramidal structure, i.e. taper portion 325 can be from the lower end of annular groove section 315 to 200 orient diameter of valve port portion gradually under big Small, under the drive of screw component 20, the lower end surface of sealing ring 33 can be with the upper surface of annular convex platform 133 (valve port portion 200) Contact or separation pass through opening between control taper portion 325 and valve port portion 200 when sealing ring 33 is separated with annular convex platform 133 Degree, can adjust the flow of motor-driven valve, that is, adjusting the stream of motor-driven valve by the cooperation in taper portion 325 and valve port portion 200 Amount.Cooperated using spool 31 and sealing ring 33, under the drive of screw component 20, sealing ring 33 can be abutted with valve port portion 200 Or separation, so that being in for motor-driven valve is closed or opened state.When sealing ring 33 is separated with valve port portion 200, pass through control valve core Aperture between 31 and valve port portion 200 can adjust the flow of motor-driven valve.In this way, motor-driven valve is opened, close, adjusts flow function Can be integrated, and reduce the internal leakage of motor-driven valve.

The motor-driven valve of the technical program, during screw rod 21 moves axially, outer race 222 will not relative to spool 31 It circumferentially rotates, the upper end of elastic element 60 is abutted with outer race 222 again, the lower end of elastic element 60 and holding tank 312 Bottom wall abut (being abutted with spool 31), therefore, sealing ring 33 will not be circumferentially rotated relative to valve port portion 200, reduction The frictional force that sealing ring 33 and annular convex platform 133 (valve port portion 200) contact site are subject to, reduces sealing ring 33 and convex annular The abrasion that platform 133 (valve port portion 200) contact site is subject to, can reduce the internal leakage of motor-driven valve, when improving motor-driven valve valve closing Airtight performance.

The setting substantially annular in shape of sealing ring 33, specifically, when installing sealing ring 33, sealing ring 33 is from taper portion 325 After lower end is inserted in, cooperated by interference press-fit approach and annular groove section 315, in this way, recessed by the way that annular is arranged on spool 31 Groove portion 315, and up big and down small pyramidal structure is set by the taper portion 325 of 315 lower section of annular groove section, it can be easily real The connection of existing sealing ring 33 and spool 31, when valve other structures are constant, the amount of parts of motor-driven valve is few, other without carrying out Technique, it is easy to assembly, more particularly to solve the problems, such as that sealing ring mounting process is complicated in minor-caliber electric valve, that is to say, that this Kind sealing ring and spool connection type are particularly suitable for minor-caliber electric valve.

Further, in order to further ensure the cooperation reliability of sealing ring 33 and annular groove section 315, further really Secrecy seal ring 33 will not deviate from from annular groove section 315, and flow control portion 314 further includes being set to annular groove section 315 and cone Annular protrusion 316 between shape portion 325, it is the shorter cylinder of the constant height of cross-sectional diameter that annular protrusion, which is 316, The outer diameter of annular protrusion 316 is greater than the outer diameter of annular groove section 315, that is, annular protrusion 316 is than annular groove section 315 It will be more slightly.Further, the outer diameter for defining the annular protrusion is D1, and the outer diameter for defining the outer wall of the annular groove section is D2, the internal diameter for defining sealing ring is D3, then can be designed as 0.15mm≤D1-D2≤0.25mm, and, 0≤D3-D2≤ 0.25mm.In this way, not only can guarantee that the sealing ring 33 that prevents of annular protrusion 316 deviate from the function of annular groove section 315, but also can prevent Only 316 outer diameter of annular protrusion is excessive and influence the assembly of sealing ring 33.And the setting of this disconnecting prevention structure need not also increase Circlip etc. has the components of similar functions.

Sealing ring 33 can have the soft sealing material of similar performance to be made by PTFE etc., when the lower end surface of sealing ring 33 When with the upper end face contact of annular convex platform 133, taper portion 325 and valve port portion 200 (annular convex platform 133) circumferentially have it is predetermined between Gap, that is, taper portion 325 is not contacted with valve port portion 200.The design of predetermined gap, on the one hand, spool 31 is dry when can prevent from closing valve On the other hand the abutting of concerning security matters seal ring 33 and annular convex platform 133 can be adjusted between making a reservation for according to the needs of motor-driven valve flow curve The size of gap meets the requirement of different operating conditions.In addition, the structure setting of the setting of predetermined gap and sealing element 33, makes motor-driven valve Opening and closing cooperated by sealing ring 33 and valve port portion 200 to realize, the flow of motor-driven valve is adjusted by taper portion 325 and valve port portion 200 Cooperation realize, as long as reducing the abrasion of sealing ring 33 Yu 200 contact site of valve port portion, it will be able to reduce the interior of motor-driven valve Leakage, it is easy to accomplish.On this basis, in the present embodiment, further, valve core housing 13 includes annular convex platform 133, that is, annular Boss 133 is formed directly on valve core housing 13, easy to process, further, it is possible to improve spool 31 and (the valve port portion of annular convex platform 133 200) concentricity.

The manufacturing method of the motor-driven valve of the present embodiment the following steps are included:

Prepare each part of valve component 10, screw component 20, core assembly 30, nut assembly 40 and rotor assembly 50 with And elastic element 60 and electromagnetic coil 70；

The lower end 213 of screw rod 20 is fixedly connected with the bearing inner ring 221 of bearing 22 as the first subassembly；It will sealing Ring 33 is sheathed with the annular groove section 315 of spool 31 from the taper portion 325 of spool 31；Elastic element 30 is assembled to spool 31 In holding tank 312；First subassembly is protruded into holding tank 312 from the upper opening portion of holding tank 312, and passes through retaining ring 32 and valve Fixed bearing 20 and elastic element 60 are limited in holding tank 312 in the upper end of core 31 forms first assembly；

Lower valve body 12 and valve core housing 13 are welded and fixed or interference press fitting is fixedly connected to form the second component；

By first assembly from the valve core housing 13 that the taper portion 325 of spool 31 is extended partially into the second component, make the valve Core retainer plate 13 and spool 31 being capable of clearance sliding fits；

Nut assembly 40 is sheathed with to the periphery of screw rod 21, is threadedly engaged nut 41 with screw rod 21, nut 41 is passed through Bulge loop 44 is welded and fixed with lower valve body 12；Rotor assembly 50 is sheathed on to the periphery of nut assembly 40, and by screw rod 21 and rotor 51 are fixedly connected by connection ring 53；

Upper valve body 11 is located to the periphery of rotor assembly 50, upper valve body 11 is fixedly connected with lower valve body 12；

Electromagnetic coil 70 is fixed by the bracket to the periphery of valve component 10.

In above-mentioned manufacturing method, sealing ring 33 is directly sheathed with the annular groove section of spool 21 by the upper end of spool 31 315 just complete the connection of sealing ring 33 Yu spool 31, and assembly method is simple, are not limited by the size of spool 31, especially suitable For small-bore motor-driven valve.

In the manufacturing method of the motor-driven valve of the present embodiment, specifically, the lower end 214 of screw rod 21 and 221 riveting of bearing inner ring Pressing is fixed, it will of course be understood that yes, in the manufacturing method of the present embodiment motor-driven valve, bearing inner ring 221 and screw rod 21 can also be with It is fixedly connected by modes such as circlips or nut described below.

The course of work of the motor-driven valve of the present embodiment is described below:

Fig. 1 and Fig. 3 show structural schematic diagram (sealing ring leaves valve port portion) when motor-driven valve is in a certain valve opening state, Fig. 4 show motor-driven valve be in closed valve state for the moment structural schematic diagram, Fig. 5 show motor-driven valve be in closed valve state two (from Together, screw rod moves down certain distance to closed valve state again).

As shown in Fig. 1 and Fig. 3, Fig. 4, when motor-driven valve is in a certain valve opening state certainly, the upper end of bearing 22 and core assembly 30 retaining ring 32 abuts, that is, bearing 22 supports retaining ring 32, and then supports spool 31, due to screw rod 21 and bearing inner ring 221 Be fixedly connected, spool 31 is fixedly connected with retaining ring 32 and sealing ring 33 again, then when screw rod 31 with rotor 51 relative to nut 41 when moving axially downwards, and core assembly 30 is being moved down with screw component 20 axially with respect to valve core housing 13 is axial together, this Core assembly 30 is always maintained at relative to the state that valve core housing 13 moves down to sealing ring 33 and valve with screw component 20 Until the upper-end contact in the valve port portion 200 (i.e. annular convex platform 131) of core retainer plate 13, that is, reaches sealing ring 33 and annular convex platform 131 is rigid State when contact is defined as closed valve state one, as shown in Figure 4.

During motor-driven valve above-mentioned is moved to closed valve state one shown in Fig. 4 from a certain valve opening state shown in Fig. 3, Electromagnetic coil 70 is powered, and rotor 51 circumferentially rotates under the influence of a magnetic field, while screw rod 21 is rotated with the rotation of rotor 51, Since nut 41 is fixedly connected by bulge loop 44 with lower valve body 12, screw rod 21 and nut 41 be threadedly engaged effect under, screw rod 21 axially downward while circumferentially rotating, and during screw rod 21 moves axially downwards, outer race 222 will not be with Screw rod 21 circumferentially rotates.Elastic element 60 is connected between outer race 222 and spool 31 again, then during being somebody's turn to do, elastic element 60 do not generate axial displacement relative to spool 31, and elastic element 60 does not generate elastic force to spool 31.Core assembly 30 leans on itself Gravity is moved axially only with respect to valve core housing 13, is not acted on by radial frictional force between spool 31 and valve core housing 13, spool 30 operation stability of component is improved.

As shown in Figure 4 and Figure 5, it is in closed valve state a pair of electromagnetic coil 70 shown in Fig. 4 from motor-driven valve to continue to be powered, silk Bar 21 and bearing 22 move axially downwards together, 222 compression elastic element 60 of outer race, generate elastic element 60 by spool 31 to valve port portion 200 (annular convex platform 131) push elastic forces, abut sealing ring 33 with annular convex platform 131, i.e., into One step ensures to close valve reliability.In this process, since outer race 222 is not circumferentially rotated with screw rod 21, elastic element 60 is made For between outer race 222 and holding tank 312, then spool 31 and sealing ring 32 to be relative to annular convex platform 133 (valve port portion 200) It does not circumferentially rotate, both valve port portion 200 and sealing ring 33 contact site not will receive the effect of circumferential frictional force, can subtract It is few, the internal leakage of motor-driven valve.

It should be noted that in the above-described embodiments, the valve port of motor-driven valve is set on valve core housing, and certainly, actual setting When, valve port can also be directly opened in lower valve body or in addition part is set and open up valve port on it, and in valve component Individual valve core housing is arranged in portion, is oriented to each connected components and core assembly.Similarly, the valve core housing in embodiment Can not be directly fixed with valve component, and valve core housing is fixed on other components, then other components are consolidated with valve component Fixed connection, alternatively, valve core housing and lower valve body are integrally formed.

Fig. 6 A show the structural schematic diagram of the motor-driven valve of the utility model embodiment two, and Fig. 6 B show the part of Fig. 6 A Schematic diagram.

The motor-driven valve of the present embodiment changes the company for being sealing ring and spool compared to the motor-driven valve of previous embodiment one Connect the variation of mode and the variation of corresponding flow control portion 314A.As shown, core assembly 30A includes spool 31A, spool 31A specifically includes cylindrical portion 313A and flow control portion 314A, the area of core assembly 30 shown in core assembly 30A and Fig. 1 It does not essentially consist in, when manufacturing the motor-driven valve of the embodiment, sealing ring 33A is directly molded by injected plastics material by injection molding manner On flow control portion 314A, has the material injection of similar performance on flow control portion 314A for example, by using PTFE etc., lean on It is molded the connection reliability that intensity guarantees the flow control portion 314A of sealing ring 33A and spool 31A.This spool and sealing ring Connection type is simple, and need not also increase other components reduces valve amount of parts when valve other structures are constant, electronic Valve arrangement is further simplified.

Specifically, flow control portion 314A includes columnar part 317 and the taper portion 325A for being set to the lower section of columnar part 317, Taper portion 325A is gradually small from the lower end of columnar part 317 to 200 orient diameter of valve port portion, and sealing ring 33 is to pass through note by injected plastics material The peripheral part that modeling mode is moulded in columnar part 317 is formed, such sealing ring generation type, just will without other components are increased Sealing ring 33A is connect with spool 31A, simple process, when valve other structures are constant, reduce motor-driven valve amount of parts and Processing step, also, such connection type, for the fit system of sealing ring 33 shown in Fig. 1 and spool 31, Advantage essentially consists in, and this connection type is not limited by the bore of motor-driven valve, is not limited to small-bore valve, can be adapted for The valve of any bore, it is applied widely.In order to further strengthen the connection reliability between sealing ring 33A and spool 31A, column The peripheral part in portion 317 is provided with annular convex rib 318A, as a kind of preferable design scheme, between the peripheral part of columnar part 317 Every setting, there are two annular convex rib 318A.It, can also be using in flow control in addition to using the design scheme of annular convex rib 318A The peripheral part setting knurling structure of portion 314A or other similar structures connect as long as can be realized and reinforce sealing ring 33A and spool 31A Connect relatively reliable effect.The operating principle and other beneficial effects of the motor-driven valve of the present embodiment are the same as example 1, Here, being not repeated to describe.

It should also be noted that, the fit system of the motor-driven valve of the technical program, bearing and screw rod can make variation, only Make screw rod be able to drive bearing integrally to move axially and bearing inner ring is driven to circumferentially rotate, i.e., bearing inner ring and screw rod it Between do not move axially and circumferentially rotate, outer race is not moved axially relative to both bearing inner rings, but can week To rotation.As shown in fig. 7, Fig. 7 show the structural schematic diagram of the motor-driven valve of the utility model embodiment three.The present embodiment Motor-driven valve, the difference with embodiment one is, the variation of the connection type of screw rod and bearing.It is the same as example 1 place not Repeat narration.As shown in fig. 7, engaging has circlip 23 on the lower end 213B of screw rod 21B, and bearing 22 passes through in the embodiment Circlip 23 connect also possible with screw rod 21B.It is understood that can also be set on the 213B of lower end in the present embodiment It sets nut and connect lower end 213B with bearing inner ring 221.The operating principle and beneficial effect and reality of the motor-driven valve of the present embodiment It is identical to apply example one, here, being not repeated to describe.The manufacturing method of the motor-driven valve of the present embodiment is only that compared with embodiment one Bearing and screw rod to be fixedly connected with mode different, be referred to the understanding of embodiment one.

It should be noted that annular convex platform (valve port portion) is set to valve core housing in embodiments set forth herein, it is possible to understand that , annular convex platform (valve port portion) is not arranged in also possible on valve core housing.For example, when valve core housing is split type structure, that is, Valve core housing is designed as to include the guide sleeve for being oriented to core assembly and two points of valve port seat being fixedly connected with lower valve body When body part, annular convex platform be can be set on valve port seat.

Citing is carried out to the manufacturing method of motor-driven valve and motor-driven valve provided herein above to introduce.It is used herein The principle and implementation of this application are described for specific case, and the above embodiments are only used to help understand The present processes and its core concept.It should be pointed out that for those skilled in the art, not departing from this Apply principle under the premise of, can also to the application, some improvement and modification can also be carried out, these improvement and modification also fall into the application In scope of protection of the claims.

Claims (9)

1. a kind of motor-driven valve, comprising: valve component, the valve component include valve port portion；Core assembly, the core assembly energy It is enough to be moved axially relative to the valve port portion, which is characterized in that the core assembly includes spool and sealing ring, the spool packet Flow control portion is included, the flow control portion includes annular groove section and taper portion, and it is recessed that the taper portion is set to the annular The lower section of groove portion, the seal ring set are set to the annular groove section；The sealing ring can cooperate with the valve port portion to close The motor-driven valve is closed, the taper portion can cooperate with the valve port portion to adjust the flow of the motor-driven valve.

2. motor-driven valve according to claim 1, which is characterized in that the flow control portion further includes being set to the annular Annular protrusion between concave part and the taper portion, the annular protrusion is the constant cylinder of cross-sectional diameter, fixed The outer diameter of the justice annular protrusion is D1, and the outer diameter for defining the outer wall of the annular groove section is D2, defines the interior of sealing ring Diameter is D3, then 0.15mm≤D1-D2≤0.25mm, and, 0≤D3-D2≤0.25mm.

3. a kind of motor-driven valve, comprising: valve component, the valve component include valve port portion；Core assembly, the core assembly energy It is enough to be moved axially relative to the valve port portion, which is characterized in that the core assembly includes spool and sealing ring, the spool packet Flow control portion is included, the flow control portion includes columnar part and taper portion, and the taper portion is set under the columnar part Side, the sealing ring are moulded in the peripheral part of the columnar part by injection molding manner, and the sealing ring can be with the valve port portion To close the motor-driven valve, the taper portion can cooperate with the valve port portion to adjust the flow of the motor-driven valve for cooperation.

4. motor-driven valve according to claim 1-3, which is characterized in that the material of the sealing ring is soft close Closure material, the valve component include the annular convex platform protruded axially upwards, and the annular convex platform works as institute as the valve port portion When stating sealing ring and valve port portion cooperation, the taper portion and the valve port portion radially have predetermined gap.

5. motor-driven valve according to claim 1-3, which is characterized in that the valve component further includes lower valve body And valve core housing, the lower valve body are fixedly connected with the valve core housing, the valve core housing includes the convex annular protruded axially upward Platform, the annular convex platform are made as the valve port portion, the sealing ring of soft sealing material, when the sealing ring with it is described When annular convex platform cooperates, the taper portion and the valve port portion radially have predetermined gap.

6. motor-driven valve according to claim 1-3, which is characterized in that the motor-driven valve further includes screw component, The screw component includes screw rod and bearing, and the bearing includes bearing inner ring and outer race, and the bearing inner ring being capable of phase The outer race is circumferentially rotated；The spool includes holding tank；Elastic element is set to the holding tank, the elasticity The upper end of element is abutted with the outer race, and the lower end of the elastic element is abutted with the spool.

7. motor-driven valve according to claim 6, which is characterized in that the screw rod includes main part and lower end, the axis Bearing sleeve is set to the lower end, the periphery wall formation step surface directed downwardly first of the lower end surface of the main part and the lower end Stage portion, the bearing are set to the holding tank, and the upper end of the bearing inner ring is abutted with the first step portion, the axis The lower end and the lower end riveting for holding inner ring are fixed.

8. motor-driven valve according to claim 6, which is characterized in that the screw rod includes main part and lower end, the axis Bearing sleeve is set to the lower end, the periphery wall formation step surface directed downwardly first of the lower end surface of the main part and the lower end Stage portion, the bearing are set to the holding tank, and the upper end of the bearing inner ring is abutted with the first step portion, the axis The lower end for holding inner ring is connect with the lower end by circlip.

9. wanting the described in any item motor-driven valves of 1-3 according to right, which is characterized in that the bearing is set to the holding tank, institute Stating bearing includes the bearing inner ring, the outer race, the rolling being set between the bearing inner ring and the outer race Pearl, the outer race can further include lower valve relative to the cell wall clearance sliding fit of the holding tank, the valve component Body and valve core housing, the lower valve body are fixedly connected with the valve core housing, and the valve core housing includes the annular protruded axially upward Boss, the annular convex platform is made as the valve port portion, the sealing ring of soft sealing material, when the sealing ring and institute When stating annular convex platform cooperation, the taper portion and the valve port portion radially have predetermined gap.