WO2015111749A1 - 流量制御弁 - Google Patents
流量制御弁 Download PDFInfo
- Publication number
- WO2015111749A1 WO2015111749A1 PCT/JP2015/052103 JP2015052103W WO2015111749A1 WO 2015111749 A1 WO2015111749 A1 WO 2015111749A1 JP 2015052103 W JP2015052103 W JP 2015052103W WO 2015111749 A1 WO2015111749 A1 WO 2015111749A1
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- WO
- WIPO (PCT)
- Prior art keywords
- valve
- valve body
- opening
- contact
- rotating shaft
- Prior art date
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Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M23/00—Apparatus for adding secondary air to fuel-air mixture
- F02M23/006—Valves specially shaped for supplying secondary air
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- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/246—Combination of a sliding valve and a lift valve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a flow rate control valve that operates by rotation of a drive source such as a motor to control the flow rate of fluid.
- an ISCV in a vehicle such as an automobile or a motorcycle, in the case of an engine in which fuel injection and ignition are controlled by an electronic control unit, another air control that is electronically controlled beside a throttle valve as an air control valve
- An ISCV in the case of an engine in which fuel injection and ignition are controlled by an electronic control unit, another air control that is electronically controlled beside a throttle valve as an air control valve
- An ISCV in the case of an engine in which fuel injection and ignition are controlled by an electronic control unit, another air control that is electronically controlled beside a throttle valve as an air control valve
- An ISCV in the case of an engine in which fuel injection and ignition are controlled by an electronic control unit, another air control that is electronically controlled beside a throttle valve as an air control valve
- An ISCV in the case of an engine in which fuel injection and ignition are controlled by an electronic control unit, another air control that is electronically controlled beside a throttle valve as an air control valve
- An ISCV in the case of an engine in which fuel injection and ignition are controlled by an electronic control unit, another air control that is electronically controlled beside
- the ISCV includes, for example, a stepping motor as an actuator that operates a valve, a shaft that rotates the stepping motor, and a valve body that has a screw mechanism between the shaft and moves in the axial direction of the shaft.
- a stepping motor as an actuator that operates a valve
- a shaft that rotates the stepping motor
- a valve body that has a screw mechanism between the shaft and moves in the axial direction of the shaft.
- the front end of the shaft is a male screw
- a nut portion provided on the valve body is screwed to the male screw, and the valve body is in the axial direction of the shaft based on forward and reverse rotation of the shaft.
- Patent Document 1 As an example of such a flow control valve, the one described in Patent Document 1 is known. This flow control valve is configured such that both the discharge port and the suction port are closed by a valve body to be in a closed state.
- the present invention has been made in view of the above circumstances, and it is possible to ensure the position accuracy of the valve closing position of the valve body, and to secure the flow stability during small flow control without closing the suction port in the closed state.
- the object is to provide a fluid control valve.
- a fluid control valve comprises a body having a first opening through which a fluid passes and a second opening through which the fluid passes;
- a rotating shaft that can be rotated forward and backward by a drive source;
- the first opening is opened and closed by the outer peripheral portion by being engaged with one end of the rotating shaft and moving along the axial direction of the rotating shaft based on the rotation of the rotating shaft.
- a valve body whose one end is in contact with or separated from the second opening;
- An urging member that urges the valve body toward the other end of the rotating shaft;
- the rotating shaft rotates and the valve body moves in the axial direction of the rotating shaft, and the first opening is closed by the outer periphery of the valve body.
- the position accuracy of the valve closing position of the valve body can be ensured by contacting the contact portion provided at one end of the valve body with the second opening serving as the suction port.
- the flow passage portion is provided at one end portion of the valve body, and fluid flows through the flow passage portion. Flow rate stability during small flow rate control can be secured without closing the suction port.
- a plurality of the contact portions may be provided at a predetermined interval in the circumferential direction of the valve body, and the flow path portion may be provided between adjacent contact portions in the circumferential direction.
- the contact portion is formed with an inclined surface that is inclined toward the shaft side of the valve body toward the one end portion side of the valve body and is in contact with the second opening. preferable.
- the second opening is inclined. It is possible to reliably ensure the position accuracy of the valve closing position of the valve body by reliably contacting the surfaces. Moreover, since the inclined surface is formed in the contact portion, the contact portion can enter the second opening. Therefore, since the amount of movement of the valve body can be increased without increasing the valve itself, the control width of the valve body can be expanded while making the valve itself compact.
- valve body moves to the other end side in the axial direction of the rotary shaft, and the outer peripheral portion of the valve body fully opens the first opening.
- an abutting portion that abuts on one end portion of the rotating shaft may be provided.
- the first opening portion is closed by the outer peripheral portion of the valve body, while the contact portion provided at one end portion of the valve body comes into contact with the second opening portion serving as the suction port.
- the position accuracy of the valve closing position of the valve body can be ensured, and even if the contact portion of the valve body contacts the second opening, a flow path portion is provided at one end of the valve body. Therefore, the flow rate stability during small flow rate control can be ensured without closing the suction port in the closed state.
- FIG. 5A is a perspective view showing a part of the valve member with a part cut away
- FIG. 5B is a rear view of the valve member. It is a perspective view of a moving member equally. It is a perspective view of the regulating member provided in the motor case. It is a perspective view which shows the state which attached the valve member to the moving member with a motor.
- FIGS. 1 and 2 are sectional views showing an example of a flow control valve according to the present invention.
- the flow control valve includes a body 100, a motor (stepping motor) 101 as a drive source, and a valve body 102.
- the body 100 is formed in a cylindrical shape, and a cylindrical motor loading portion 103 for loading a motor 101 therein and a cylindrical valve body loading portion 104 having a smaller diameter than the motor loading portion 103 are axially arranged.
- the motor 101 is provided in the motor case 105.
- the motor case 105 is formed in a cylindrical shape having a hollow cylindrical shape, and two annular coils 101a along the inner peripheral surface are arranged in front and rear along the axial direction as a stator of the motor 101 on the inner peripheral surface side. Is provided.
- the coil 101a is supported by the coil support member 101c while being wound around the coil bobbin 101b.
- a rotating body 101e On the inner side of the annular coil 101a, there is provided a rotating body 101e provided with a cylindrical magnet 101d fixed to the outer periphery.
- the rotating body 101e is a rotor that rotates with respect to the stator.
- a motor is constituted by the stator and the rotor, and the rotating body 101e having the magnet 101d is rotated by electromagnetic force.
- the rotating body 101e is formed in a cylindrical shape having a hollow cylindrical shape, and a convex portion 101f is formed at one end portion (lower end portion) thereof, and a through hole is formed in the convex portion 101f.
- a rotary shaft 106 that serves as a rotation axis of the rotor passes through the through hole, and the rotary shaft 106 is fixed.
- one end (lower end) of the rotating body 101e protrudes in a bowl shape on the outer peripheral side, and positions one end of the cylindrical magnet 101d.
- the outer peripheral surface of the bowl-shaped portion and the outer peripheral surface of the magnet 101d have substantially the same outer diameter and are arranged coaxially.
- the rotating shaft 106 is a round bar-like member, and the one end portion side (lower end portion side) extends into the body 100 from the motor case 105 with the tip end portion of the convex portion 101f of the rotating body 101e as a substantially center. Moreover, the other end part side (upper end part side) of the rotating shaft 106 is arrange
- the rotation shaft 106 has a shape in which the diameter of the male screw portion 106 a is larger than the diameter of the shaft portion 106 b, and the male screw portion 106 a is expanded in diameter relative to other portions of the rotation shaft 106. As will be described later, the female screw portion 114a of the valve body 102 is screwed into the male screw portion 106a.
- the central portion of the rotating shaft 106 is supported by the convex portion 101 f, and the convex portion 101 f is rotatably supported by the bearing portion 107 of the motor case 105.
- the bearing portion 107 is illustrated integrally with the motor case 105, but may be separate from the motor case 105.
- the other end portion (upper end portion) of the rotating shaft 106 is rotatably supported by the shaft support portion 108 in a state of being disposed inside the rotating body 101e as described above.
- the shaft support portion 108 functions as a sliding bearing and functions as a radial bearing and a thrust bearing.
- the rotation shaft 106 has its center of rotation defined by the shaft support portion 108, and movement in the direction from one end portion of the rotation shaft 106 toward the other end portion is restricted along the axial direction of the rotation shaft 106. .
- the movement in the opposite direction is restricted by a compression coil spring 122 as an urging member as will be described later.
- the valve body 102 is provided by screwing a male thread portion 106 a provided at one end portion of the rotary shaft 106, and the fluid passes by moving in the axial direction of the rotary shaft 106 based on the rotation of the rotary shaft 106.
- the first opening 110 is opened and closed.
- the first opening 110 is formed by an opening at the inner end of a through hole 109 that penetrates from the inner peripheral surface of the valve body loading portion 104 of the body 100 toward the outer peripheral surface.
- a plurality of through holes 109 and first openings 110 are provided at predetermined intervals in the circumferential direction of the body 100.
- the first opening 110 is opened and closed by the valve body 102.
- the valve body 102 includes a valve member 111 and a moving member 112.
- the valve member 111 is formed in a cylindrical shape, and its outer peripheral surface is in sliding contact with the inner peripheral surface of the valve body loading portion 104 (see FIGS. 1 and 2). Therefore, the first opening 110 is opened and closed by the outer peripheral surface (outer peripheral portion) of the valve member 111.
- one end portion of the valve member 111 is opened in a circular shape, and the other end portion is provided with a disc-shaped closing plate 111a.
- the central portion of the closing plate 111a is formed in.
- the obstruction plate 111a is formed with four rectangular through holes 111c arranged radially with respect to the through hole 111b. These four through holes 111c are arranged at equal intervals in the circumferential direction.
- the rib 113 includes an arc-shaped peripheral wall portion 113a and linear wall portions 113b and 113b formed at both ends of the peripheral wall portion 113a.
- the inner peripheral surfaces of the four peripheral wall portions 113a of the four ribs 113 are formed continuously in the axial direction with the inner peripheral surface of the circular through hole 111b, and the surfaces of the wall portions 113b and 113b facing in the circumferential direction are
- the rectangular through-hole 111c is continuously formed in the axial direction with the surface facing the circumferential direction.
- the moving member 112 includes a cylindrical main body portion 114, a contact portion 115 provided at one end portion of the main body portion 114, and a restriction portion 116 provided at the other end portion of the main body portion 114. And. As shown in FIGS. 1 and 2, a female threaded portion 114a is formed on the inner peripheral surface of a cylindrical hole inside the main body 114, and a male threaded portion 106a at one end of the rotary shaft 106 is screwed into the female threaded portion 114a. is doing.
- One end portion of the hole in which the female screw portion 114a is formed is closed to form a contact surface (contact portion) 114b, and one end surface of the rotary shaft 106 can contact the contact surface 114b.
- the outer diameter of the main body 114 is substantially equal to or slightly smaller than the inner diameter of the through hole 111b provided in the closing plate 111a of the valve member 111, whereby the main body 114 passes through the through hole 11b and the valve member 111. Can be inserted.
- the contact portion 115 contacts the second opening 118 described later to position the valve body 102 when the valve is closed.
- the abutting portion 115 includes a retaining portion 115 a that the rib 113 of the valve member 111 abuts and prevents the valve member 111 from coming off from the moving member 112.
- four contact portions 115 are provided at one end portion of the main body portion 114 at equal intervals in the circumferential direction, and a flow path is provided between the contact portions 115 and 115 adjacent in the circumferential direction.
- Four portions 117 are provided at equal intervals in the circumferential direction.
- the abutting portion 115 is formed by cutting out a prefix conical portion provided at the distal end portion of the main body portion 114 at a portion that becomes the flow path portion 117, and the regulating portion 116 side of the abutting portion 115 is formed.
- a facing contact surface (prevention portion) 115 a can contact the rib 113.
- the contact portion 115 is formed to have a size that allows the contact portion 115 to pass through a rectangular through hole 111c formed in the closing plate 111a of the body 100, and faces the regulating portion 116 side of the contact portion 115, and A surface orthogonal to the main body 114 is a retaining portion (contact surface) 115a. Therefore, after the contact portion 115 passes through the through hole 111c, the retaining portion 115a of the contact portion 115 can contact the rib 113 by rotating the main body portion 114 by 45 ° around the axis.
- the inclined surface 115b of the abutment portion 115 that is inclined with respect to the axis of the main body portion 114 is closer to the axial side of the main body portion 114 (valve body 102) toward the one end side of the main body portion 114 (valve body 102). Inclined. Further, as shown in FIGS. 1 and 2, a through hole (suction hole) 119 is provided at the center of the closing plate provided at one end (lower end) of the body 100, and the suction hole 119 A first opening 118 is provided at the opening edge of the inner end.
- the inclined surfaces 115 b of the four contact portions 115 can contact the first opening 118.
- the inclined surface 115b serves as a stopper surface for restricting the movement of the moving member 112, thereby positioning the valve body 102 when the valve is closed.
- the inclined surface 115 b in a state where the inclined surface 115 b is in contact with the first opening 118, there is a channel portion 117 between the first opening 118 and the main body portion 114. ) Is available for distribution.
- the restricting portion 116 is a portion that the valve member 111 comes into contact with and restricts the movement of the valve member 111 toward the other end portion of the rotating shaft 106.
- the restricting portion 116 is formed by cutting out a disk-like flange portion provided at the other end portion of the main body portion 114 into a rectangular shape at four locations at equal intervals in the circumferential direction. 4 are provided at equal intervals, and a notch 120 is formed between the regulating portions 116 and 116 adjacent in the circumferential direction.
- the cutout portion 120 is disposed on an extension line in the axial direction of the flow passage portion 117, and has substantially the same shape and size as the four rectangular through holes 111 c provided in the closing plate 111 a of the valve member 111.
- the retaining portion 115 a of the contact portion 115 can contact the rib 113 by rotating the main body portion 114 by 45 ° around the axis.
- the rectangular through hole 111c and the cutout portion 120 are disposed so as to overlap in the axial direction of the moving member 112, and further, the regulating portion 116 is adjacent to the closing plate 111a of the valve member 111 in the circumferential direction. It becomes possible to contact between 111c. Therefore, the movement of the valve member 111 toward the other end portion of the rotary shaft 106 can be restricted by the restriction portion 116.
- a restriction member 121 that engages with the valve body 102 and restricts the rotation of the valve body 102 around the axis is provided in the body 100. That is, as shown in FIG. 5, four columnar regulating members 121 are provided at equal intervals in the circumferential direction on the disc 105a fixed to the other end surface of the motor case 105.
- the regulating member 121 extends in parallel with the rotary shaft 106 toward the valve body loading portion 104 (see FIGS. 1 and 2), and is arranged in the circumferential direction on the outer peripheral side of the convex portion 101f through which the rotary shaft 106 is inserted. Arranged at intervals.
- the cross-sectional shape of the regulating member 121 is substantially equal to or slightly smaller than the rectangular through hole 111c and the notch 120, and the through hole 111c and the notch 120 are arranged so as to overlap in the axial direction of the moving member 112. Further, by being inserted into the through hole 111 c and the notch 120, the valve member 111 and the moving member 112 are engaged, that is, the valve body 102 is engaged. Since the regulating member 121 is fixed to the motor case 105 via the disc 105a, the rotation of the valve body 102 around the axis can be regulated.
- the length of the regulating member 121 is such that the lower end surface of the rotary shaft 106 abuts on the abutting surface 114 b inside the moving member 112 when the moving member 112 moves upward (
- the length is set such that the lower end portion of the restricting portion 121 can enter the four through holes 111 c of the valve member 111. Therefore, in this state, the rotation of the valve member 111 about the axis is restricted by the restriction member 112 and the rib 113 of the valve member 111 is in contact with the retaining portion 115a of the movement member 112, so That is, slipping out of the motor 101 is prevented.
- a compression coil spring (biasing member) 122 is provided on one end side (lower end side) inside the body 100, that is, on the valve body loading unit 104.
- One end (lower end) of the compression coil spring 122 is installed around the suction port 118 on the bottom surface of the valve body loading unit 104, and the other end (upper end) is inserted into the cylindrical valve member 111.
- the valve member 111 is in pressure contact with the back surface of the closing plate 111 a outside the rib 113. Therefore, the valve member 111 is biased to the other end side (upper end side) of the rotary shaft 106 by the compression coil spring 122.
- the valve body 102 is located on the upper side, and one end surface (lower end surface) of the rotating shaft 106 is in contact with the contact surface 114 b at the lower end of the hole in which the female thread portion 114 a of the moving member 112 is provided.
- the contacted state is the valve opening position where the first opening 110 of the discharge hole 109 is opened.
- the valve element 102 is positioned on the lower side and one end (lower end) of the moving member 112 is located. Part) is in the closed position where the second opening 118 is closed.
- the female screw portion 114 a of the moving member 112 is screwed into the male screw portion 106 a provided at one end (lower end) of the rotating shaft 106 of the motor 101.
- the moving member 112 is engaged and attached to the shaft 106, and the four regulating members 121 are inserted into the four notches 120 provided at the other end of the moving member 112.
- the restricting member 121 restricts the rotation of the moving member 112.
- the male screw portion 106a of the rotary shaft 106 is screwed into the female screw portion 114a of the moving member 112 by a predetermined length.
- the moving member 112 is inserted into the valve member 111.
- the valve member 111 is extrapolated to the moving member 112.
- the four through holes 111 c of the valve member 111 are aligned with the four contact portions 115 of the moving member 112 in the circumferential direction, and then the moving member 112 is inserted into the valve member 111.
- the contact portion 115 passes through the through hole 111c and the main body portion 114 passes through the central through hole 111b.
- the moving member 112 main body portion 114 is rotated by 45 ° around the axis.
- the retaining portion 115a of the abutting portion 115 and the rib 113 of the valve member 111 face each other so that the retaining portion 115a can abut on the rib 113, and the restricting member 121 is connected to the through hole 111c of the valve member 111.
- the restricting member 121 is inserted into the through hole 111c by further inserting the moving member 112 into the valve member 111 (externally inserting the valve member 111 into the moving member 112). As a result, the rotation of the valve member 111 is restricted.
- the motor 101 is operated again to rotate the rotating shaft 106 in the forward direction, so that the inner end of the moving member 112 is brought into contact with one end surface (lower end surface) of the rotating shaft 106 as shown in FIG.
- the surface 114b is brought into contact.
- the rotation of the valve member 111 around the axis is regulated by the regulating member 112, and the rib 113 of the valve member 111 is in contact with the retaining portion 115a of the moving member 112. The escape from the motor 101 is prevented.
- the compression coil spring 122 is inserted into the valve body loading portion 104 of the body 100, and the compression coil spring 122 is installed on the bottom surface of the valve body loading portion 104.
- the valve body 102 composed of the valve member 111 and the moving member 112 that are prevented from coming out is loaded into the valve body loading section 104, and the upper end portion of the compression coil spring 122 is brought into contact with the closing plate 111a of the valve member 111. . In this state, the compression coil spring 122 is not compressed.
- valve member 111 When the valve body 102 is loaded into the valve body loading section 104, the valve member 111 is pushed upward by the compression coil spring 122 (the other end side of the rotating shaft 106) and moves. In this case, the compression coil spring 112 is slightly compressed by its own weight. When the valve member 111 moves upward by a predetermined distance, the valve member 111 comes into contact with the restricting portion 116 of the moving member 112 and the further upward movement of the valve member 111 (the other end side of the rotating shaft 106) is restricted. Is done. Further, when the valve member 111 moves upward, one end face (lower end face) of the regulating member 121 is positioned below one end face (lower end face) of the valve member 111.
- the compression coil spring 122 When the valve member 111 moves upward and is positioned a predetermined distance above the position at which the discharge hole 110 formed in the body 100 is completely opened, the compression coil spring 122 is fully extended. By lowering the valve body 102 together with the motor case 105 from the state by a predetermined distance, the compression coil spring 122 is compressed by a predetermined amount. In this case, the valve body 102 is lowered so that the discharge hole 110 is not blocked by the valve member 111. Thereafter, fixing the motor case 105 to the motor loading unit 103 ends the assembly of the valve body 102 to the motor 101. In this state, the valve body 102 is always urged upward by the compression coil spring 122. Since the rotary shaft 106 is screwed to the moving member 112 of the valve body 102, the upward biasing force is received by the rotary shaft 106 and further received by the shaft support portion 108.
- valve body 102 opens the first opening 110 of the discharge hole 109 when the engine is in an idling state. That is, as shown in FIG. 2, when the valve body 102 is in the valve closing position, the rotation shaft 106 is rotated in the forward direction by the motor 101, and the male screw portion 106 a of the rotary shaft 106 and the female screw portion 114 a of the moving member 112. By the action of the feed screw, the moving member 112 starts to move upward in the axial direction, and in conjunction with the moving member 112 (at the same time as the moving member 112), the valve member 111 starts to move upward, as shown in FIG. The outer peripheral surface opens the first opening 110.
- the moving member 112 moves upward until one end face (lower end face) of the rotary shaft 106 comes into contact with the contact face 114b of the hole in which the female thread portion 114a is formed. The rotation of the shaft 106 stops. Then, one end (lower end) of the moving member 112 is completely separated from the first opening 118 of the suction hole 119 to completely open the first opening 118.
- the air introduced from the surge tank upstream of the throttle valve to the suction hole 119 via the pipe flows into the valve body loading unit 104, discharges from the discharge hole 110, and flows into the engine.
- valve member 111 when the operating state other than idling is entered, as shown in FIG. 1, when the valve body 102 is in the valve open position, the rotating shaft 106 is rotated in the reverse direction by the motor 101, and the valve body 102 (valve member 111) is moved. The first opening 110 of the discharge hole 109 is closed. That is, the moving member 112 starts to move downward in the axial direction due to the feed screw action of the male screw portion 106 a of the rotating shaft 106 and the female screw portion 114 a of the moving member 112, and interlocks with the moving member 112 (at the same time as the moving member 112. ) The valve member 111 starts to move downward, and its outer peripheral surface closes the first opening 110 as shown in FIG.
- the rotary shaft 106 rotates and the valve body 102 moves in the axial direction of the rotary shaft 106, so that the valve member of the valve body 102
- the first opening 110 is closed by the outer peripheral portion 111, while the contact portion 115 provided at one end portion of the moving member 112 of the valve body 102 is in contact with the second opening 118 serving as a suction port.
- the position accuracy of the valve closing position of the body 102 can be ensured.
- a flow path portion 117 is provided at one end of the moving member 112, and fluid can flow through the flow path portion 117. Therefore, the flow path can be secured without closing the suction port (second opening) 118 in the valve-closed state.
- contact portions 115 are provided at predetermined intervals in the circumferential direction of the moving member 112 of the valve body 102, and a flow path portion 117 is provided between the contact portions 115 and 115 adjacent in the circumferential direction.
- the position accuracy of the valve closing position of the valve body can be easily ensured, and the fluid flows through the flow path portion 17 provided between the contact portions 115 adjacent to each other in the circumferential direction. (2 openings) 118 can be reliably secured without closing.
- the contact portion 115 is formed with an inclined surface 115b that contacts the second opening 118, even if there is some variation in the diameter of the second opening 118, the second opening 118 has an inclined surface. As a result, the position accuracy of the valve closing position of the valve body 102 can be reliably ensured.
- the inclined surface 115 b is formed in the contact portion 115, the contact portion 115 can enter the second opening 118. Therefore, since the movement amount of the valve body 102 can be increased without increasing the valve itself, the control width of the valve body 102 can be expanded while making the valve itself compact.
- valve body 102 moves to the other end side in the axial direction of the rotating shaft 106 and the outer peripheral portion of the valve member 111 fully opens the first opening 110, the one end of the rotating shaft 106 is contacted.
- a contact surface (contact portion) 114b that comes into contact is provided in a hole inside the moving member 112 of the valve body 102. Therefore, when the outer periphery of the valve member 111 fully opens the first opening 110, the contact surface (contact portion) 114 b comes into contact with one end portion of the rotary shaft 106. The position accuracy can be ensured reliably.
- the valve body 102 when the valve body 102 is assembled to the motor 101, the internal thread portion 114a of the moving member 112 is screwed into the external thread portion 106a at one end of the rotary shaft 106 that can be rotated by the motor 101, and then the moving member 112 is While inserting the member 111 and abutting the valve member 111 against the retaining portion 115a to prevent the valve member 111 from coming out, the compression is provided by providing a compression coil spring 122 in the valve body loading portion 104 inside the body 100. The coil spring 122 is stably held inside the body 100.
- the valve body 102 can be easily assembled to the motor 101 by installing the valve member 111 on the compression coil spring 122.
- valve member 111 When removing the valve body 102, the valve member 111, which is prevented from being detached, is pulled out of the body 100 together with the moving member 112 and separated from the compression coil spring 122, and then the rotating shaft 106 is rotated by the motor 101. The movement member 112 is moved downward to release the rotation restriction of the valve member 111 by the restriction member 121. Next, by rotating the valve member 111 about 45 degrees around the axis, releasing the valve member 111 is released, the valve member 111 is removed from the moving member 112, and further, the moving member 121 is removed from the rotating shaft 106, The valve body 102 can be easily removed.
- the moving member 112 can be inserted into the valve member 111, and the moving member 112 is inserted into the valve member 111 and rotated relatively by a predetermined angle (45 °) around the axis, thereby allowing the valve Since the member 111 can come into contact with the retaining portion 115a, the valve member 111 can be reliably prevented from coming off when the valve body 102 is assembled to the motor 101.
- a regulating member 121 that engages with the valve body 102 and regulates rotation around the axis of the valve body 102 is fixed to the motor case 105 in the body 100, the rotating shaft 106 is provided with the motor.
- the restricting member 121 engages with the valve body 102 to restrict the rotation of the valve body 102 about the axis, so that the valve body 102 is reliably aligned along the axial direction of the rotary shaft 106. Can be moved to.
- the regulating member 121 regulates the rotation of the valve member 111 around the axis when the valve member 111 can come into contact with the retaining portion 115a and is prevented from coming out. It is possible to reliably prevent the escape.
Abstract
Description
しかし、閉弁状態において吸入口に弁体を当接させた方が構成簡素となり位置精度を出し易い。
駆動源によって正逆方向に回転可能な回転シャフトと、
前記回転シャフトの一端部に係合して設けられ、当該回転シャフトの回転に基いて当該回転シャフトの軸方向に沿って移動することにより、前記第1開口部を外周部によって開閉するとともに、前記第2開口部に、一端部が接離する弁体と、
前記弁体を前記回転シャフトの他端部側に付勢する付勢部材とを備え、
前記弁体の一端部に、前記第1開口部が前記弁体の外周部によって全閉状態になる場合に、前記第2開口部に当接する当接部と、流体を流通させる流路部が設けられていることを特徴とする。
また、弁体の当接部が第2開口部に当接しても、当該弁体の一端部には流路部が設けられており、この流路部を流体が流れるので、閉弁状態において吸入口を閉鎖することなく、小流量制御時の流量安定性を確保できる。
また、当接部に傾斜面が形成されているので、第2開口部に当接部が入り込むことが可能となる。したがって、弁自体を大きくしなくても弁体の移動量を大きくとることができるので、弁自体をコンパクトにしつつ弁体の制御幅を広げることができる。
図1および図2は本発明に係る流量制御弁の一例を示す断面図である。図1および図2に示すように、流量制御弁は、ボデー100と、駆動源としてのモータ(ステッピングモータ)101と、弁体102とを備えている。
モータ101はモータケース105内に設けられている。このモータケース105は、内部が円筒中空の円柱状に形成され、その内周面側にモータ101のステータとして、内周面に沿う環状の二つのコイル101aが軸方向に沿って前後に並んで設けられている。コイル101aはコイルボビン101bに巻かれた状態で、コイル支持部材101cに支持されている。
円環状のコイル101aの内側には、円筒状のマグネット101dを外周に固定した状態に備えている回転体101eが設けられている。この回転体101eがステータに対して回転するロータになっており、ステータとロータからモータが構成され、マグネット101dを有する回転体101eが電磁力により回転するようになっている。
また、回転シャフト106の一端部側は、その外周面に雄ねじ部106aが形成されている。なお、ここでは、雄ねじ部106a以外の部分をシャフト部106bとする。
回転シャフト106は、雄ねじ部106aの径が、シャフト部106bの径より大きくなっており、雄ねじ部106aが回転シャフト106の他の部分に対して拡径された形状になっている。この雄ねじ部106aには、後述のように弁体102の雌ねじ部114aが螺合するようになっている。
また、回転シャフト106の他端部(上端部)は、上述のように回転体101eの内側に配置されている状態で、軸支持部108により回転自在に支持されている。軸支持部108は、滑り軸受として機能するとともにラジアル軸受およびスラスト軸受として機能している。すなわち、回転シャフト106が軸支持部108により回転中心を規定されているとともに、回転シャフト106の軸方向に沿って、回転シャフト106の一端部から他端部に向う方向の移動が規制されている。なお、その反対方向への移動は、後述のように付勢部材としての圧縮コイルばね122により規制されている。
貫通孔109および第1開口部110は、ボデー100の周方向に所定間隔で複数設けられている。そして、この第1開口部110が弁体102によって開閉されるようになっている。
弁部材111は、図3(a)に示すように、円筒状に形成されており、その外周面が弁体装填部104の内周面に摺接している(図1および図2参照)。したがって、第1開口部110は弁部材111の外周面(外周部)によって開閉されるようになっている。
また、弁部材111の一端部は円形状に開口しており、他端部には円板状の閉塞板111aが設けられ、図3(b)に示すように、この閉塞板111aの中央部に円形状の貫通孔111bが形成されている。また、閉塞板111aには、貫通孔111bに対して放射状に配置された4つの矩形状の貫通孔111cが形成されている。これら4つの貫通孔111cは周方向に等間隔で配置されている。
図1および図2に示すように、本体部114の内部の円筒状の孔の内周面に雌ねじ部114aが形成され、この雌ねじ部114aに回転シャフト106の一端部の雄ねじ部106aが螺合している。雌ねじ部114aが形成された孔の一端部は閉塞して当接面(当接部)114bとなっており、この当接面114bに回転シャフト106の一端面が当接可能となっている。
また、本体部114の外径は、弁部材111の閉塞板111aに設けられた貫通孔111bの内径とほぼ等しいか若干小さくなっており、これによって、本体部114は貫通孔11bを通して弁部材111に挿通可能となっている。
図4に示すように、当接部115は、本体部114の一端部に周方向に等間隔で4つ設けられており、周方向に隣り合う当接部115,115の間には流路部117が周方向の等間隔で4つ設けられている。当接部115は、本体部114の先端部に設けられた接頭円錐状の部分を流路部117となる部分で切り欠いて形成されたものであり、当接部115の規制部116側を向く当接面(抜止部)115aがリブ113に当接可能となっている。
また、当接部115は、ボデー100の閉塞板111aに形成された矩形の貫通孔111cを通過可能となるような大きさに形成され、この当接部115の規制部116側を向き、かつ本体部114と直交する面が抜止部(当接面)115aとされている。したがって、当接部115が貫通孔111cを通過した後、本体部114を軸回りに45°回転させることによって、当接部115の抜止部115aがリブ113に当接可能となる。
また、図1および図2に示すように、ボデー100の一端部(下端部)に設けられた閉塞板の中央部には貫通孔(吸入孔)119が設けられており、この吸入孔119の内側端部の開口縁部に第1開口部118が設けられている。
そして、4つの当接部115のそれぞれの傾斜面115bは第1開口部118に当接可能となっている。すなわち、移動部材112の一端部が吸入孔119に進入して、傾斜面115bが第1開口部118に当接することによって、それ以上の移動部材112の移動を規制するようになっている。したがって、傾斜面115bは移動部材112の移動を規制するためのストッパ面となっており、これによって、閉弁時における弁体102の位置決めを行っている。
また、傾斜面115bが第1開口部118に当接した状態において、当該第1開口部118と本体部114との間には流路部117があるので、この流路部117を通して流体(空気)が流通可能となっている。
この切欠部120は流路部117の軸方向の延長線上に配置されており、弁部材111の閉塞板111aに設けられた4つの矩形の貫通孔111cとほぼ等しい形状・大きさとなっている。
また、規制部材121の断面形状は、矩形の貫通孔111cおよび切欠部120とほぼ等しいか若干小さくなっており、貫通孔111cおよび切欠部120が移動部材112の軸方向に重なって配置された場合に、貫通孔111cおよび切欠部120に挿通されることで、弁部材111と移動部材112に係合する、つまり弁体102に係合するようになっている。この規制部材121は円板105aを介してモータケース105に固定されているので、弁体102の軸回りの回転を規制することができる。
この場合、モータ101を作動させて、回転シャフト106を正方向に回転させることによって、回転シャフト106の雄ねじ部106aを、移動部材112の雌ねじ部114aに所定長さだけ螺合する。
この場合、弁部材111の4つの貫通孔111cを、移動部材112の4つの当接部115に周方向において合わせたうえで、移動部材112を弁部材111に挿通する。これによって、当接部115が貫通孔111cを通過するとともに、本体部114が中央の貫通孔111bを通過する。
そして、当接部115が貫通孔111cを通過して、リブ113を越えた場合に、移動部材112(本体部114)を軸回りに45°回転させる。これによって、当接部115の抜止部115aと弁部材111のリブ113が対向して、抜止部115aがリブ113に当接可能となるとともに、規制部材121が弁部材111の貫通孔111cと周方向において合致する。
次に、移動部材112を弁部材111にさらに挿通する(弁部材111を移動部材112に外挿する)ことによって、規制部材121が貫通孔111cに挿通される。これによって、弁部材111の回転が規制される。
この状態では弁部材111は軸回りの回転が規制部材112によって規制されるとともに、弁部材111のリブ113が移動部材112の抜止部115aに当接しているので、移動部材112からの抜け出、つまりモータ101からの抜け出が防止されている。
次に、抜け出が防止された弁部材111と移動部材112とからなる弁体102を弁体装填部104に装填するとともに、圧縮コイルばね122の上端部を弁部材111の閉塞板111aに当接する。なお、この状態では圧縮コイルばね122は圧縮されていない。
弁部材111が所定距離だけ上側に移動すると、弁部材111が移動部材112の規制部116に当接し、弁部材111のそれ以上の上側(回転シャフト106の他端部側)への移動が規制される。
また、弁部材111が上側に移動することによって、規制部材121の一端面(下端面)は、弁部材111の一端面(下端面)より下方に位置する。
その後、モータケース105をモータ装填部103に固定することによって、弁体102のモータ101への組み付けを終了する。この状態において、弁体102は圧縮コイルばね122によって常に上方に付勢されている。弁体102の移動部材112には回転シャフト106が螺合しているので、前記上方への付勢力は回転シャフト106が受け、さらに軸支持部108が受けることになる。
この際、移動部材112はその雌ねじ部114aが形成された孔の当接面114bに回転シャフト106の一端面(下端面)が当接するまで上向きに移動し、当接した時点でモータ101による回転シャフト106の回転が停止する。そして移動部材112の一端部(下端部)が吸入孔119の第1開口部118から完全に離間して、第1開口部118を完全に開放する。
そして、スロットルバルブよりも上流側のサージタンクから配管を経由して吸入孔119に導かれた空気は、弁体装填部104に流入し、吐出孔110から吐出してエンジンに流入する。
また、弁体102は、弁部材111が吐出孔110を閉鎖した後または、閉鎖と同時に移動部材112の一端部(下端部)の傾斜面115bが吸入孔119の第1開口部118に当接することによって、それ以上の移動部材112の下方への移動が規制される。
また、傾斜面115bが第2開口部118に当接した状態において、第2開口部118と本体部114との間には流路部117があるので、この流路部117を通して流体(空気)が流通可能となっている。
また、移動部材112の当接部115が第2開口部118に当接しても、移動部材112の一端部には流路部117が設けられており、この流路部117を通して流体が流通可能となっているので、閉弁状態において吸入口(第2開口部)118を閉鎖することなく、流路を確保できる。
加えて、当接部115に傾斜面115bが形成されているので、第2開口部118に当接部115が入り込むことが可能となる。したがって、弁自体を大きくしなくても弁体102の移動量を大きくとることができるので、弁自体をコンパクトにしつつ弁体102の制御幅を広げることができる。
また、規制部材121は弁部材111が抜止部115aに当接可能となって抜け出が防止された場合に、弁部材111の軸回りの回転を規制するので、弁部材111の移動部材112からの抜け出を確実に防止できる。
101 モータ
102 弁体
106 回転シャフト
106a 雄ねじ部
110 第1開口部
114a 雌ねじ部
114b 当接面(当接部)
115 当接部
117 流路部
118 第2開口部
122 圧縮コイルばね(付勢部材)
Claims (4)
- 流体が通過する第1開口部と流体が通過する第2開口部が形成されたボデーと、
駆動源によって正逆方向に回転可能な回転シャフトと、
前記回転シャフトの一端部に係合して設けられ、当該回転シャフトの回転に基いて当該回転シャフトの軸方向に沿って移動することにより、前記第1開口部を外周部によって開閉するとともに、前記第2開口部に、一端部が接離する弁体と、
前記弁体を前記回転シャフトの他端部側に付勢する付勢部材とを備え、
前記弁体の一端部に、前記第1開口部が前記弁体の外周部によって全閉状態になる場合に、前記第2開口部に当接する当接部と、流体を流通させる流路部が設けられていることを特徴とする流量制御弁。 - 前記当接部は前記弁体の周方向に所定間隔で複数設けられ、周方向において隣り合う当接部間に前記流路部が設けられていることを特徴とする請求項1に記載の流量制御弁。
- 前記当接部に、前記弁体の一端部側に向かうほど前記弁体の軸側に傾き、かつ前記第2開口部に当接する傾斜面が形成されていることを特徴とする請求項2に記載の流量制御弁。
- 前記弁体に、当該弁体が前記回転シャフトの軸方向の他端部側に移動して、当該弁体の外周部が前記第1開口部を全開状態とした場合に、前記回転シャフトの一端部に当接する当接部が設けられていることを特徴とする請求項1~3のいずれか1項に記載の流量制御弁。
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US10900583B2 (en) * | 2017-07-17 | 2021-01-26 | Motion Express, Inc. | Explosion proof actuator assembly and servo system |
JP2020068561A (ja) * | 2018-10-23 | 2020-04-30 | 日本電産サンキョー株式会社 | 弁体駆動装置 |
JP2020180659A (ja) * | 2019-04-26 | 2020-11-05 | 日本電産サンキョー株式会社 | 弁体駆動装置 |
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EP3101320A1 (en) | 2016-12-07 |
JP2015140809A (ja) | 2015-08-03 |
EP3101320A4 (en) | 2017-10-18 |
US20170002950A1 (en) | 2017-01-05 |
US9927043B2 (en) | 2018-03-27 |
JP6209093B2 (ja) | 2017-10-04 |
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