CN105276205A - Electric valve - Google Patents
Electric valve Download PDFInfo
- Publication number
- CN105276205A CN105276205A CN201510378344.0A CN201510378344A CN105276205A CN 105276205 A CN105276205 A CN 105276205A CN 201510378344 A CN201510378344 A CN 201510378344A CN 105276205 A CN105276205 A CN 105276205A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve shaft
- mentioned
- shaft support
- thread part
- Prior art date
- 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.)
- Granted
Links
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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
- F16K31/042—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves with electric means, e.g. for controlling the motor or a clutch between the valve and the motor
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
- F16K31/502—Mechanical actuating means with screw-spindle or internally threaded actuating means actuating pivotable valve members
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
- F16K31/504—Mechanical actuating means with screw-spindle or internally threaded actuating means the actuating means being rotable, rising, and having internal threads which co-operate with threads on the outside of the valve body
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Lift Valve (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention provides an electric valve, and the electric valve can enable a valve core which moves up and down to abut against a valve seat at a stable posture. The electric valve (10) is provided with a thread feeding mechanism (A) which enables the rotating movement of a rotor (2) to be changed into linear movement. The electric valve (10) is characterized in that C1 is less than C2 when the external diameter of an external thread part (4a) of a valve shaft (4) is set as C1 and the internal diameter of the lower side of a spiral spring (27) relative to a sitting part of a spring bottom (32a) is set as C2.
Description
Technical field
The present invention relates to the mortor operated valve that the stepper motor that controls the refrigerant flow of freeze cycle etc. is driving.
Background technique
In the mortor operated valve that the stepper motor used as variable throttle valve, flow control valve etc. is driving, the feed screw mechanism be made up of internal thread and outside thread is utilized the rotary motion of the rotor of electric motor to be transformed to the straight line motion of valve shaft, the opening and closing (such as, patent documentation 1) carrying out valve is moved relative to valve seat by making the spool of the below being configured at valve shaft.
Fig. 5 (A), Fig. 5 (B) represent such mortor operated valve 20A in the past.
In this mortor operated valve 20A, constitute the feed screw mechanism 9 for valve shaft 3 by the external thread part 5 (movable threaded portion) of periphery and the internal thread part 8 (retaining thread portion) of inner circumferential that is formed at valve shaft support 7 that are formed at valve shaft 3.And, in this mortor operated valve 20A, utilize feed screw mechanism 9 that the rotary motion of rotor 11 is transformed to the straight line motion of valve shaft 3, and make the spool 12 be configured at immediately below valve shaft 3 contact relative to valve seat 13, leave by this straight line motion, thus the flow of the fluids such as refrigeration agent is adjusted.
In addition, this spool 12 possesses the vavle shelf 12a of tubular integratedly in the upper portion at the position abutted with valve port 13a.
But, in such mortor operated valve 20A, representing as amplified in Fig. 6, be formed with the shaft portion 3a of the tubular of specific length in the upper side of the external thread part 5 of valve shaft 3.
Further, valve shaft support 7 has tubular minor diameter part 7a in upper side, and has tubular large-diameter portion 7b in lower side.In addition, be formed with internal thread part 8 in the inner peripheral surface bottom of the tubular minor diameter part 7a of upper side, and be formed with the bearing portion 18 of tubular on inner peripheral surface top.
Like this, owing to being provided with bearing portion 18 at valve shaft support 7, so the inclination of valve shaft 3 (waving) can be suppressed.
As shown in Fig. 5 (A), the valve shaft support 7 formed as described above is fixed with the underpart 40a of housing 40 of cup-shaped and the end-to-end joint part of the upper end portion 31a of valve chamber forming member 31 that not revolvable mode is being formed as tubular.Further, the underpart of valve shaft support 7 is configured in valve chamber forming member 31.
In addition, be located at valve chamber forming member 31 axis bottom input/output port 31b in, be connected with the first joint 17, and be connected with the second joint 19 in the side of valve chamber forming member 31.Further, in input/output port 31b, the valve guide element 341 of roughly tubular through is along the vertical direction fixed with in irremovable mode.In addition, valve seat 13 is provided with in the below of this valve guide element 34.
Further, be provided with large-diameter portion 3b in the underpart of valve shaft 3, and representing as amplified in Fig. 5 (B), loosen at this large-diameter portion 3b and being embedded with spool fixed component 56.
The spool 12 take a seat relative to valve seat 13, disseated is made up of the valve portion of forward end and the vavle shelf 12a of tubular of the top that is configured at valve portion presenting direct valve function.And, the vavle shelf 12a of tubular is fixed with at spool fixed component 56.Further, with in the vavle shelf 12a of spool 12 one, the helical spring 54 of compressive state and the spring seat member 55 of convex form is accommodated.
The active force from helical spring 54 is had in the effect of this spring seat member 55.
Thus, if spool 12 is connected to the valve port 13a being formed at valve seat 13, and valve shaft 3 moves to valve closing direction, then helical spring 54 is compressed.Further, utilize spring force to press spool 12, thus close valve port 13a.
But, in the mortor operated valve 20A of such structure, as shown in Figure 6, above the internal thread part 8 of inner circumferential being located at valve shaft support 7, be formed with the bearing portion 18 of specific length.And when being screwed valve shaft 3 in the inner circumferential of valve shaft support 7, the shaft portion 3a of valve shaft 3 is configured in bearing portion 18.In this condition, even if valve shaft 3 moves along the vertical direction, the shaft portion 3a of valve shaft 3 is also configured in bearing portion 18, thus suppresses the inclination (waving) of valve shaft 3, and guides valve shaft 3 along the vertical direction with stable posture.
But, even if in such mortor operated valve 20A, also easily produce following such problem.Easily produce this problem is such as trickle when the effective diameter of the external thread part 5 as valve shaft 3 is 2 ~ 3mm.
Namely, in mortor operated valve 20A in the past, as shown in Fig. 7 (A), Fig. 7 (B), when the external diameter of the external thread part 5 by valve shaft 3 be set to C1, the lower end side of helical spring 54 is set to C2 relative to the internal diameter of the part of taking a seat of spring seat portions time, be set to C1 > C2.
Owing to being set to the relation of C1 > C2 as described above, thus from the underpart 7c of the tubular minor diameter part 7a of valve shaft support 7, comprise extension projection 41 that the below to valve shaft 3 extends, also have and connect until the imaginary space B of continuing surface 55a of spring seat member 55 of convex form is formed as with diameter tapered rounding frustum shape downward.
In addition, the position of centre of gravity G of this imaginary space B is compared with the situation of the cylindrical body (cylindrical body) of above and below equal diameters, and the height from continuing surface 55a is higher.
Therefore, if be set to the relation of C1 > C2, then the difference of taking a seat of spring.That is, press valve shaft 3 downwards when helical spring 54 and after being compressed, easily bend to the left and right.
Like this, when helical spring 54 take a seat poor, as shown in Fig. 5 (B), when valve closing, spool 12 is connected to valve seat 13 with the posture tilted or midway that spool 12 is abutting to valve seat 13 swings to the left and right.
Under these circumstances, there is the spool 12 being configured at the below of valve shaft 3 to be connected to valve seat 13 obliquely or to be connected to the problem of valve seat 13 with the posture of instability.Under these circumstances, spool 12 and valve seat 13 is being utilized correctly to carry out having problems in flow control.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Application Publication 2013-539849 publication
Summary of the invention
Invent problem to be solved
In view of such actual conditions in the past, the object of the present invention is to provide the mortor operated valve that the spool of movement along the vertical direction can be made with stable posture to be connected to valve seat all the time.
Mortor operated valve of the present invention 10 for realizing above-mentioned purpose possesses:
Valve shaft support 6, it is formed with internal thread part 6d and bearing portion 6e, can not rotate, and can not move along the vertical direction relative to the rotation of rotor 2;
Valve shaft 4, it is formed with external thread part 4a at the peripheral part of upper side, and is formed with the shaft portion 4b of tubular at the peripheral part of lower side, rotates integratedly with above-mentioned rotor 2, and moves along the vertical direction with this rotation;
Feed screw mechanism A, it is made up of the external thread part 4a of above-mentioned valve shaft 4 and the internal thread part 6d of above-mentioned valve shaft support 6;
The vavle shelf 25 of tubular, it is located at the underpart of above-mentioned valve shaft 4 in the mode of anticreep, and possesses spool 32 integratedly;
Helical spring 27, it is located in the vavle shelf 25 of above-mentioned tubular, exerts a force to valve closing direction when valve closing to above-mentioned spool 32; And
Valve chamber forming member 70, above-mentioned valve shaft support 6 is fixed as and can not rotates and this valve shaft support 6 self can not move along the vertical direction by it, is provided with seat portion 21 at the input/output port 14 being located at axial bottom, and divides in inside and have valve chamber 70a,
The feature of said electric valve 10 is,
Above-mentioned valve shaft support 6 is integrally formed, and,
When the external diameter of the external thread part 4a by above-mentioned valve shaft 4 be set to C1, the lower end side of above-mentioned helical spring 27 is set to C2 relative to the internal diameter of the part of taking a seat of spring seat portions 32a time,
Be set to C1 < C2.
According to the mortor operated valve of such structure, due to helical spring bending stable, so spool can be made not to be seated at valve seat obliquely relative to valve seat.Thus, the take a seat stability of spool relative to valve seat is improved.Thereby, it is possible to reduce the leakage of fluid when taking a seat, the durability in valve portion in addition can be improved.
In addition, in the present invention,
The internal diameter D1 of the above-mentioned internal thread part 6d of preferred above-mentioned valve shaft support 6 is set to less than the internal diameter D2 of above-mentioned bearing portion 6e,
Above-mentioned valve shaft 4 rotates while move along the vertical direction with the rotation of above-mentioned rotor 2, thus at above-mentioned valve shaft 4 from the top down or when moving from bottom to top, above-mentioned feed screw mechanism A to be screwed length L constant.
According to the mortor operated valve of such structure, due to valve shaft can be guided along the vertical direction with stable posture all the time, so correctly flow control can be carried out.
In addition, in the present invention,
Preferably at the periphery sidepiece of above-mentioned valve shaft support 6, be provided with the press-in portion 34 of the inner periphery side portion being pressed into above-mentioned valve chamber forming member 70,
By being pressed in above-mentioned valve chamber forming member 70 by above-mentioned press-in portion 34, carry out the centering of above-mentioned spool 32 relative to above-mentioned valve chamber forming member 70.
If be provided with press-in portion 34 at the periphery sidepiece of valve shaft support 6 like this, then simply and accurately can carry out the centering of spool 32 relative to valve chamber forming member 70.Further, because structure is also simple, so who reliably can carry out assembling operation.And, existing component parts can be utilized feel relieved, also not need to use fixture, thus the manufacture cost that more can suppress mortor operated valve compared with the past.
Herein, in the present invention, the effective diameter of the external thread part of above-mentioned valve shaft 4 also can be 2 ~ 3mm.
Like this, the present invention can be corresponding with the pathization of valve shaft 4.
Effect of the present invention is as follows.
According to mortor operated valve of the present invention, due to helical spring bending stable, so spool can be made not to be seated at valve seat obliquely relative to valve seat, improve the take a seat stability of spool relative to valve seat thus.Further, the leakage of fluid when taking a seat can be reduced, in addition can improve the durability in valve portion.
Further, seal when mortor operated valve of the present invention can contribute to valve closing and contribute to downsizing, such as, also can apply well even if the effective diameter of the external thread part of valve shaft is 2 ~ 3mm.
Accompanying drawing explanation
Fig. 1 is the sectional view of the preferred mode of execution representing mortor operated valve of the present invention.
Fig. 2 is the schematic diagram of the assembling morphology of the valve shaft shown in Watch with magnifier diagram 1 and valve shaft support.
Fig. 3 (A), Fig. 3 (B) are the sectional views of the assembling morphology representing the valve shaft shown in Fig. 1 and valve shaft support.
Fig. 4 (A), Fig. 4 (B) are the diagrammatic cross-sectional view of the helical spring shape for representing the mortor operated valve shown in Fig. 1.
Fig. 5 (A) is the sectional view of mortor operated valve in the past, and Fig. 5 (B) is the partial enlarged drawing of Fig. 5 (A).
Fig. 6 is the schematic diagram of Watch with magnifier diagram 5 (A), the valve shaft of the mortor operated valve in the past shown in Fig. 5 (B) and the assembling morphology of valve shaft support.
Fig. 7 (A) is the sectional view of the relation representing helical spring in mortor operated valve in the past and valve shaft, and Fig. 7 (B) is the schematic diagram representing the helical spring profile shown in Fig. 7 (A).
In figure:
2-rotor, 2a-limited part, 4-valve shaft, 4a-external thread part, 4b-shaft portion, 4c-diameter reducing part, 6-valve shaft support, 6a-tubular minor diameter part, 6b-tubular large-diameter portion, 6c-underpart, 6d-external thread part, 6e-bearing portion, 6f-lip part, 6g-upper end open portion, 6h-limited part, 10-mortor operated valve, 14-input/output port, 21-seat portion, 25-vavle shelf, 27-helical spring, 32-spool, 32a-spring seat portions, 33-housing part, 37-the second joint, 38-the first joint, 50-valve shaft assembly body, 60-housing, 60a-underpart, 70-valve chamber forming member, 70a-valve chamber, 70b-upper end portion, 83-valve shaft support room, A-feed screw mechanism.
Embodiment
Below, be preferred embodiment described of the present invention with reference to accompanying drawing.
Fig. 1 is the sectional view representing mortor operated valve preferred embodiment of the present invention, and Fig. 2 is the schematic diagram of the assembling morphology representing valve shaft in the mortor operated valve shown in Fig. 1 and valve shaft support.
In addition, in this specification, " on " or D score be with the presence of Fig. 1.
In this mortor operated valve 10, be formed as the underpart of the opening side of the housing 60 of the cup-shaped of tubular by non magnetic system, be connected with valve chamber forming member 70 by welded.
In the valve chamber 70a of valve chamber forming member 70, connect the first joint 38 in below (axis), connect the second joint 37 in side, be provided with seat portion 21 on the top of the input/output port 14 of the valve chamber forming member 70 be connected with the first joint 38.
In addition, this seat portion 21 is parts different from the valve chamber forming member 70 of the lower end side being configured at housing 60, but seat portion 21 also can directly be formed at valve chamber forming member 70.
The rotor 2 that can rotate is accommodated in the inner circumferential of housing 60.
In the periphery of housing 60, be configured with the not shown stator be made up of yoke portion, bobbin and coil etc., constitute stepper motor by rotor 2 and stator.
And, between the underpart 60a and the upper end portion of valve chamber forming member 70 of housing 60, be fixed with the valve shaft support 6 of the tubular being formed with through hole in inside, this valve shaft support 6 is fixed to via its lip part 6f and can not relatively rotates relative to valve chamber forming member 70.This valve shaft support 6 is the single parts be integrally formed, and the resin preferably by suitable is integrally formed.This valve shaft support 6 has the function of the inclination suppressing valve shaft 4 described later.
Above-mentioned valve shaft support 6 is made up of the tubular large-diameter portion 6b of the tubular minor diameter part 6a of upper side, lower side, the lip part 6f of press-in portion 34 and ring-type that is pressed into the inner periphery side portion of valve chamber forming member 70.
Although not shown, but the press-in portion 34 of valve shaft support 6 is provided with multiple at the periphery sidepiece of the tubular large-diameter portion 6b of valve shaft support 6 at predetermined intervals discretely.In the present embodiment, be circumferentially provided with press-in portion 34 at four positions discretely, but without particular limitation of being four positions, such as, also can be at two positions every the angle of 180 ° is arranged.But when when being provided with press-in portion 34 every two positions of the angle of 180 °, when being pressed into valve shaft support 6 to valve chamber forming member 70, there is valve shaft support 6 to offset and relative to the worry of the oblique inclination of valve chamber forming member 70.Thus, in order to further reliably at valve chamber forming member 70 standing valve bracing strut 6, preferably this press-in portion 34 is set more than three positions.If arrange press-in portion 34 like this more than three positions, then when being pressed into valve shaft support 6 relative to valve chamber forming member 70, there is no the worry of valve shaft support 6 left and right skew forwards, backwards, thus can reliably feel relieved.
In addition, in the periphery of the tubular minor diameter part 6a of valve shaft support 6, the spiral chute that the limited part 2a of rotor 2 is guided is formed with.In addition, in the side of the tubular large-diameter portion 6b of valve shaft support 6, run through and be provided with balancing orifice 51, this balancing orifice 51 realizes all pressures be formed between the valve shaft support room 83 of the inside of valve shaft support 6 and the space outerpace of valve shaft support 6.By arranging such balancing orifice 51, carry out the shift action of valve shaft support 6 thus swimmingly.
In addition, in this valve shaft support 6, be formed with internal thread part 6d from upper opening portion, the inner circumferential side 6g of tubular minor diameter part 6a towards the below of the degree of depth of regulation, be formed with bearing portion 6e in the below of internal thread part 6d, this bearing portion 6e does not form thread groove.Utilize this bearing portion 6e to prevent the inclination (waving) of valve shaft 4 described later.
In the axial portions of rotor 2, via housing part 33 through be configured with valve shaft 4.The major component of valve shaft 4 is installed on the inner side of valve shaft support 6, and this valve shaft 4 rotates integratedly with rotor 2.Be formed with external thread part 4a at the peripheral part of the upper side of valve shaft 4, and be formed with shaft portion 4b across the lower side of diameter reducing part 4c downwards from this external thread part 4a.
And, constitute feed screw mechanism A by the external thread part 4a of the periphery being formed at valve shaft 4 with the internal thread part 6d of the inner circumferential being formed at valve shaft support 6.
Further, valve shaft 4 lower end side and be configured with the vavle shelf 25 of tubular in the inner side of the tubular large-diameter portion 6b of valve shaft support 6, by drawing, bending is approximate right angle in the side, upper end portion of this vavle shelf 25.The anticreep that vavle shelf 25 utilizes the lip part of this bending and achieves for valve shaft 4.And, in vavle shelf 25, accommodate the helical spring 27 and spring seat 35 that have compressed.Further, spool 32 is fixed with in the lower end of vavle shelf 25 by welding etc.
And in this mortor operated valve 10, valve shaft 4, vavle shelf 25, spring seat 35, helical spring 27 and spool 32 etc. are formed as a valve shaft assembly body 50.In addition, the spool 32 being located at the underpart of vavle shelf 25 can carry out axial relative movement relative to valve shaft 4 and relatively rotate.
In addition, the effective diameter of the external thread part of the valve shaft 4 in present embodiment is 2 ~ 3mm.
Further, the opening diameter of seat portion 21 is 0.5 ~ 4.5mm, and the length L that is screwed of feed screw mechanism A is 2 ~ 10mm.
Below, the action of the mortor operated valve 10 formed as described above is described.
When closing mortor operated valve 10, by giving pulse signal to not shown coil, rotor 2 is rotated to clockwise direction when overlooking, simultaneously because of the effect of feed screw mechanism A, valve shaft 4 also rotates and declines, and spool 32 is inserted in seat portion 21.Behind the assigned position that spool 32 is inserted in valve seat forming member 70, rotor 2 further rotates and spool 32 and seat portion 21 abut mutually, in this condition, the limited part 2a of rotor 2 is connected to the limited part 6h of valve shaft support 6, forcibly stop the decline of valve shaft 4, thus action terminates with the posture of Fig. 1.
On the other hand, when opening mortor operated valve 10, such as, if make the pulse signal that rotor 2 rotates counterclockwise under the state of Fig. 1, and rotor 2 rotates counterclockwise, then meanwhile, valve shaft 4 also rotates rising, thus spool 32 leaves and mortor operated valve 10 valve opening from seat portion 21.
In the mortor operated valve 10 of present embodiment carrying out action as described above, in order to make the spool 32 of the below being configured at valve shaft 4 be connected to seat portion 21 with stable posture all the time, and have employed following structure.
That is, the bearing portion 6e of valve shaft support 6 is arranged on the side, underpart of tubular minor diameter part 6a, and the external thread part 4a of valve shaft 4 is arranged on the upper side of tubular minor diameter part 6a.
Like this, if bearing portion 6e is arranged on the side, underpart of tubular minor diameter part 6a, and the external thread part 4a of valve shaft 4 is arranged on the upper side of tubular minor diameter part 6a, then can reduce the rocking tendency of valve shaft 4.
Further, the internal diameter D1 of the internal thread part 6d of valve shaft support 6 is set to less than the internal diameter D2 of the bearing portion 6e of valve shaft support 6.
Like this, if be set as D1 < D2, then the length L that is screwed of feed screw mechanism A can be set to length constant all the time.
Like this, in the mortor operated valve 10 carrying out flow control, as mentioned above, in Fig. 3 (B) of state when Fig. 3 (A) of the state when representing valve closing and expression valve opening, feed screw mechanism A to be screwed length L constant all the time.Namely, after such as the ground of valve shaft 4 maximum limit shown in Fig. 3 (A) moves downwards, after being such as moved upward to valve shaft 4 maximum limit shown in Fig. 3 (B), because external thread part 4a is all screwed throughout the whole region of the internal thread part 6d of valve shaft support 6, so it is constant to be all the time screwed length L.
Further, in the mortor operated valve 10 of such structure, as shown in Figure 4, the external diameter C1 of the external thread part 4a of valve shaft 4 is set to less relative to the internal diameter C2 of the part of taking a seat of spring seat portions 32a than the lower end side of helical spring 27.If be set as C1 < C2 like this, then the rocking tendency of valve shaft 4 tails off.
Further, if be set as C1 < C2, then the position of centre of gravity G when rounding frustum shape of the position of centre of gravity G of imaginary space B than Fig. 7 is low, thus taking a seat of spring becomes good.
Thus, the spool 32 shown in Fig. 1 is connected to seat portion 21 with stable posture or all the time away from seat portion 21, so correctly can carry out flow adjustment.
Further, in mortor operated valve 10, the position of feed screw mechanism A does not contact with valve shaft support room 83, but is positioned at the top of valve shaft support room 83.
Thus, in this case, even if be mixed into rubbish etc. in fluid, also prevented it from embedding feed screw mechanism A.Thus, the adjustment of valve opening can not be caused to produce not smooth.
When helical spring 27 take a seat good, play following effect.
If that is, helical spring 27 take a seat good, then as shown in Figure 1, when valve closing, spool 32 can not tilt or spool 32 can not swing to the left and right, and spool 32 can be made to take a seat with stable posture.Thereby, it is possible to the leakage etc. of anti-fluid.
Thus, in the mortor operated valve 10 possessing such helical spring 27, spool 32 can be made to be connected to seat portion 21 with stable posture all the time or away from seat portion 21, thus correctly can carry out flow adjustment.
Above, be preferred embodiment illustrated of the present invention, but the present invention is not limited to this.
Such as, in the above-described embodiment, valve shaft 4, vavle shelf 25, spring seat 35, helical spring 27 and spool 32 etc. are formed as a valve shaft assembly body 50, but the locking mechanism of spool 32 also can be other structure.
Further, the present invention can apply when the effective diameter of the external thread part 4a of valve shaft 4 is the such paths of 2 ~ 3mm, certainly also can be applied to the diameter more than this.
In addition, can be effective when the opening diameter of seat portion 21 is 0.5 ~ 4.5mm, but certainly also can be applied to diameter in addition.
Claims (4)
1. a mortor operated valve (10), possesses:
Valve shaft support (6), it is formed with internal thread part (6d) and bearing portion (6e), can not rotate, and can not move along the vertical direction relative to the rotation of rotor (2);
Valve shaft (4), it is formed with external thread part (4a) at the peripheral part of upper side, and the shaft portion (4b) of tubular is formed at the peripheral part of lower side, rotate integratedly with above-mentioned rotor (2), and move along the vertical direction with this rotation;
Feed screw mechanism (A), it is made up of the external thread part (4a) of above-mentioned valve shaft (4) and the internal thread part (6d) of above-mentioned valve shaft support (6);
The vavle shelf (25) of tubular, it is located at the underpart of above-mentioned valve shaft (4) in the mode of anticreep, and possesses spool (32) integratedly;
Helical spring (27), it is located in the vavle shelf (25) of above-mentioned tubular, exerts a force to valve closing direction when valve closing to above-mentioned spool (32); And
Valve chamber forming member (70), above-mentioned valve shaft support (6) is fixed as and can not rotates and this valve shaft support (6) self can not move along the vertical direction by it, seat portion (21) is provided with at the input/output port (14) being located at axial bottom, and division has valve chamber (70a) in inside
The feature of said electric valve (10) is,
Above-mentioned valve shaft support (6) is integrally formed, and,
When the external diameter of the external thread part (4a) by above-mentioned valve shaft (4) be set to C1, the lower end side of above-mentioned helical spring (27) is set to C2 relative to the internal diameter of the part of taking a seat of spring seat portions (32a) time,
Be set to C1 < C2.
2. mortor operated valve according to claim 1, is characterized in that,
The internal diameter (D1) of the above-mentioned internal thread part (6d) of above-mentioned valve shaft support (6) is set to less than the internal diameter (D2) of above-mentioned bearing portion (6e),
Above-mentioned valve shaft (4) rotates while move along the vertical direction with the rotation of above-mentioned rotor (2), thus at above-mentioned valve shaft (4) from the top down or when moving from bottom to top, above-mentioned feed screw mechanism (A) to be screwed length (L) constant.
3. mortor operated valve according to claim 1 and 2, is characterized in that,
At the periphery sidepiece of above-mentioned valve shaft support (6), be provided with the press-in portion (34) of the inner periphery side portion being pressed into above-mentioned valve chamber forming member (70),
By above-mentioned press-in portion (34) being pressed in above-mentioned valve chamber forming member (70), carry out the centering of above-mentioned spool (32) relative to above-mentioned valve chamber forming member (70).
4., according to the mortor operated valve described in any one of claims 1 to 3, it is characterized in that,
The external diameter of the external thread part (4a) of above-mentioned valve shaft (4) is 2 ~ 3mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-147984 | 2014-07-18 | ||
| JP2014147984A JP6270650B2 (en) | 2014-07-18 | 2014-07-18 | Motorized valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105276205A true CN105276205A (en) | 2016-01-27 |
| CN105276205B CN105276205B (en) | 2017-12-29 |
Family
ID=55145732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510378344.0A Active CN105276205B (en) | 2014-07-18 | 2015-07-01 | Motor-driven valve |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6270650B2 (en) |
| CN (1) | CN105276205B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917231A (en) * | 2016-10-11 | 2018-04-17 | Ckd株式会社 | The manual open and close valve of weir formula |
| CN108071701A (en) * | 2016-11-10 | 2018-05-25 | 株式会社鹭宫制作所 | Motor-driven valve and refrigerating circulation system |
| CN110735935A (en) * | 2018-07-19 | 2020-01-31 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
| CN111396618A (en) * | 2016-03-28 | 2020-07-10 | 株式会社不二工机 | Electric valve |
| CN111566398A (en) * | 2018-01-17 | 2020-08-21 | 株式会社不二工机 | Electric valve |
| CN112728122A (en) * | 2019-10-28 | 2021-04-30 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6523200B2 (en) * | 2016-03-31 | 2019-05-29 | 株式会社鷺宮製作所 | Motorized valve |
| JP6691064B2 (en) * | 2017-01-25 | 2020-04-28 | 株式会社鷺宮製作所 | Motorized valve and refrigeration cycle system |
| JP6726124B2 (en) * | 2017-03-23 | 2020-07-22 | 株式会社鷺宮製作所 | Motorized valve and refrigeration cycle system using the same |
| CN110966426B (en) * | 2018-09-30 | 2022-08-26 | 浙江三花汽车零部件有限公司 | Expansion valve |
| US11982477B2 (en) * | 2019-06-28 | 2024-05-14 | Zhejiang Sanhua Intelligent Controls Co., Ltd | Electronic expansion valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006084012A (en) * | 2004-09-17 | 2006-03-30 | Fuji Koki Corp | Motor operated valve |
| CN101220884A (en) * | 2007-01-11 | 2008-07-16 | 株式会社不二工机 | Electric valve |
| CN101644337A (en) * | 2008-08-04 | 2010-02-10 | 株式会社鹭宫制作所 | Electric valve |
| CN101788073A (en) * | 2009-01-22 | 2010-07-28 | 株式会社不二工机 | Mortor operated valve |
| CN102650336A (en) * | 2011-02-24 | 2012-08-29 | 株式会社不二工机 | Electric valve |
| CN102853086A (en) * | 2011-07-01 | 2013-01-02 | 浙江三花股份有限公司 | Electrically operated valve device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5291477B2 (en) * | 2009-01-22 | 2013-09-18 | 株式会社不二工機 | Motorized valve |
| JP5424919B2 (en) * | 2010-02-05 | 2014-02-26 | 株式会社不二工機 | Motorized valve |
-
2014
- 2014-07-18 JP JP2014147984A patent/JP6270650B2/en active Active
-
2015
- 2015-07-01 CN CN201510378344.0A patent/CN105276205B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006084012A (en) * | 2004-09-17 | 2006-03-30 | Fuji Koki Corp | Motor operated valve |
| CN101220884A (en) * | 2007-01-11 | 2008-07-16 | 株式会社不二工机 | Electric valve |
| CN101644337A (en) * | 2008-08-04 | 2010-02-10 | 株式会社鹭宫制作所 | Electric valve |
| CN101788073A (en) * | 2009-01-22 | 2010-07-28 | 株式会社不二工机 | Mortor operated valve |
| CN102650336A (en) * | 2011-02-24 | 2012-08-29 | 株式会社不二工机 | Electric valve |
| CN102853086A (en) * | 2011-07-01 | 2013-01-02 | 浙江三花股份有限公司 | Electrically operated valve device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396618A (en) * | 2016-03-28 | 2020-07-10 | 株式会社不二工机 | Electric valve |
| CN107917231A (en) * | 2016-10-11 | 2018-04-17 | Ckd株式会社 | The manual open and close valve of weir formula |
| CN108071701A (en) * | 2016-11-10 | 2018-05-25 | 株式会社鹭宫制作所 | Motor-driven valve and refrigerating circulation system |
| CN111566398A (en) * | 2018-01-17 | 2020-08-21 | 株式会社不二工机 | Electric valve |
| CN111566398B (en) * | 2018-01-17 | 2022-04-05 | 株式会社不二工机 | Electric valve |
| CN110735935A (en) * | 2018-07-19 | 2020-01-31 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
| CN112728122A (en) * | 2019-10-28 | 2021-04-30 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105276205B (en) | 2017-12-29 |
| JP6270650B2 (en) | 2018-01-31 |
| JP2016023711A (en) | 2016-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105276205A (en) | Electric valve | |
| CN105276200A (en) | Electric valve | |
| JP5510686B2 (en) | Electric valve and its stopper | |
| JP6472637B2 (en) | Motorized valve | |
| JP6310161B2 (en) | Electronic expansion valve | |
| JP4805617B2 (en) | Electric control valve | |
| US9435457B2 (en) | Flow regulating valve | |
| US10344872B2 (en) | Electric valve having a valve body with a constricted surface portion | |
| JP5677349B2 (en) | Motorized valve | |
| JP2010019406A (en) | Motor-driven valve | |
| JP6392686B2 (en) | Motorized valve | |
| KR101257519B1 (en) | Electric motor valve | |
| JP2003329158A (en) | Motor-driven valve | |
| JP2006316835A (en) | Electric control valve | |
| JP6359593B2 (en) | Motorized valve | |
| JP2016211726A (en) | Electric valve | |
| JP6522023B2 (en) | Motorized valve | |
| JP6691064B2 (en) | Motorized valve and refrigeration cycle system | |
| JP2017223263A5 (en) | ||
| JP2003329157A (en) | Motor-driven valve | |
| JP2018115743A (en) | Motor-operated valve and refrigeration cycle system | |
| JP2000220759A (en) | Electric control valve | |
| CN110345292A (en) | Motor-driven valve | |
| JP6503033B2 (en) | Motorized valve | |
| JP6722230B2 (en) | Motorized valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |