JP2018080724A - Control valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control valve which can reduce failure that impairs sealability of a seal member.SOLUTION: In a control valve CV, a valve body 3 having an opening M2 on an outer peripheral surface is rotatably housed in a valve body housing part 13 of a housing having the hollow valve body housing part 13 and a communication port E2 communicating with the valve body housing part 13. A seal member S2 which slidably contacts with the valve body 3 is disposed between the communication port E2 and the valve body 3. A seal guide part M2a serving as a chamfer part is provided at an outer peripheral edge of the opening M2 which slidably contacts with the seal member S2 in the valve body 3.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a control valve for controlling the flow rate of fluid, and more particularly to a control valve suitable for controlling the flow rate of cooling water in a cooling system of a vehicle such as an automobile.

  Conventionally, as a conventional control valve applied to, for example, the flow rate control of cooling water for automobiles, a valve as described in Patent Document 1 is known.

  The control valve disclosed in Patent Document 1 is a rotary valve that controls the flow rate according to the rotational position of the rotor, which is a cylindrical valve body, and is opened by superposition of the communication port of the housing and the opening of the rotor. The valve is closed when the relative position between the communication port of the housing and the opening of the rotor is shifted.

  A seal member urged by a spring is provided at the communication port of the housing, and this seal member is in sliding contact with the outer peripheral surface of the rotor.

German Patent Application Publication No. 2011088033

  However, since the control valve disclosed in Patent Document 1 has a clearance between the communication port of the housing and the seal member, when the rotor is rotated, the seal member biased by the spring is rotated in one direction of the rotor. It will be inclined to the side. Thus, when the rotation direction of the rotor is reversed while the seal member is tilted in one direction, the seal member remains tilted in one direction, and the outer peripheral portion on the tip side of the seal member is the opening of the rotor. There was a possibility that the outer peripheral edge of the portion would abut strongly and the sealing performance could be impaired.

  The present invention has been devised in view of such a technical problem, and an object of the present invention is to provide a control valve capable of reducing a problem that impairs sealing performance.

  According to the present invention, in one aspect thereof, a housing having a hollow valve body housing portion, a communication port communicating with the valve body housing portion, and a shaft that is rotatable in the valve body housing portion. A valve body that is supported and has an opening on the outer peripheral surface, and is provided between the communication port in the valve body housing portion and the outer peripheral surface of the valve body, and the opening according to the rotational phase of the valve body A seal member biased to the outer peripheral surface of the valve body so as to communicate with the communication port, and the opening and / or the outer peripheral surface of the valve body slidingly contacting the seal member in the rotation direction of the valve body And a chamfered portion provided on the outer peripheral edge of the seal member in sliding contact.

  According to the present invention, it is possible to reduce problems that impair the sealing performance.

It is a block diagram which shows an example of the circuit structure of the cooling water for motor vehicles using the control valve to which this invention was applied. It is a block diagram which shows the other example of the circuit structure of the cooling water for motor vehicles using the control valve to which this invention was applied. It is a disassembled perspective view which shows the structure of the control valve in 1st Embodiment of this invention. It is a top view of the control valve in a 1st embodiment of the present invention. It is the sectional view on the AA line of FIG. It is a principal part enlarged view of FIG. (A) is a perspective view of the control valve in 1st Embodiment of this invention, (b) is a front view of the same control valve. (A) is the sectional view on the AA line of FIG.7 (b), (b) is the sectional view on the BB line of FIG.7 (b). It is a conceptual diagram showing the operating state of the control valve in 1st Embodiment of this invention, Comprising: It is a figure which concerns on the AA line cross section of FIG. (A) is a perspective view of the valve body which concerns on 2nd Embodiment of this invention, (b) is a top view of the valve body. (A) is sectional drawing which shows the sliding state of the valve body and sealing member in the AA cross section of FIG.10 (b), (b) is the valve body in the BB sectional view of FIG.10 (b). It is sectional drawing which shows a sliding state with a sealing member. It is sectional drawing which shows the sliding state of the valve body and seal member which concern on 3rd Embodiment of this invention. (A) is a perspective view of the valve body which concerns on 4th Embodiment of this invention, (b) is a front view of the valve body. (A) is the figure which arranged the 1st seal member in the AA line sectional view of Drawing 13 (b), (b) the 2nd seal member was arranged in the BB line sectional view of Drawing 13 (b) FIG. (A) is a perspective view of the valve body which concerns on 5th Embodiment of this invention, (b) is a front view of the valve body. (A) is the figure which arranged the 1st seal member in the AA line sectional view of Drawing 15 (b), and (b) arranged the 2nd seal member in the BB line sectional view of Drawing 15 (b). FIG.

  Hereinafter, embodiments of a control valve according to the present invention will be described with reference to the drawings. In each of the following embodiments, the control valve according to the present invention is described as an example in which the control valve according to the present invention is applied to a circulating circuit for automotive cooling water (hereinafter, abbreviated as “cooling water”) similar to Patent Document 1. To do.

[First Embodiment]
FIG. 1 is a block diagram showing the configuration of a cooling water circulation circuit to which a control valve according to the present invention is applied.

  The control valve CV is attached to a side portion of the engine EG (specifically, a cylinder head (not shown)). The control valve CV includes an engine EG, a heating heat exchanger HT that exchanges heat to create warm air from the air conditioner, an EGR cooler EC that cools exhaust gas after combustion in the engine EG, and a slide in the engine EG. It is arranged between an oil cooler OC that cools oil for lubricating a moving part, and a radiator RD that cools cooling water for cooling the engine EG.

  Specifically, the cooling water discharged from the water pump WP is guided to the control valve CV through the introduction passage L0, and by this control valve CV, the heating heat exchanger HT, the oil cooler OC, and the pipes L1 to L3 Each is distributed to the radiator RD. That is, the control valve CV controls the flow rate of the cooling water distributed by these pipes L1 to L3. At this time, the cooling water led to the heating heat exchanger HT is led to the EGR cooler EC and then returned to the engine EG side through the water pump WP. Similarly, the cooling water guided to the oil cooler OC and the radiator RD is also returned to the engine EG side through the water pump WP.

  Further, the control valve CV has a bypass passage BL that directly leads the cooling water from the engine EG to the throttle chamber TC that controls the flow rate of air mixed with the fuel combusted in the engine EG by bypassing the introduction passage L0. Is provided. Thereby, the cooling water guided from the engine EG side can be constantly supplied to the throttle chamber TC. Then, the cooling water supplied to the throttle chamber TC is led to the EGR cooler EC and is returned to the engine EG side via the EGR cooler EC and the water pump WP, like the heating heat exchanger HT. In addition, the code | symbol WT of FIG. 1 has shown the water temperature sensor which measures the water temperature in the circulation circuit of a cooling water.

  Here, the control valve CV is not necessarily disposed immediately after the engine EG, and may be disposed immediately before the engine EG, for example, as shown in FIG. Can be changed. Further, since the cooling water distributed to the throttle chamber TC does not correspond to the target of flow control as will be described later, the presence or absence of the bypass passage BL can be appropriately changed according to the specification of the mounting target.

  3 is an exploded perspective view showing the structure of the control valve CV in this embodiment, FIG. 4 is a plan view of the control valve CV, and FIG. 5 is a cross-sectional view taken along the line AA of FIG.

  The control valve CV includes a housing 1 including a first housing 11 and a second housing 12, and a cylindrical valve body 3 that is supported in the first housing 11 via a drive shaft 2 so as to be rotatable about a rotation axis Z. And an electric motor 4 housed in the first housing 11 and driving the valve body 3, and a speed reducing mechanism 5 housed in the second housing 12 and decelerating the rotation of the electric motor 4 and transmitting it to the drive shaft 2. And having.

  In the present embodiment, the first housing 11 is manufactured by casting with an aluminum alloy material. As shown in FIG. 5, the first housing 11 includes a cylindrical valve body accommodating portion 13 that opens downward in the figure and accommodates the valve body 3. Moreover, in this embodiment, although the 1st housing 11 and the 2nd housing 12 mentioned later have illustrated what was manufactured with the aluminum alloy material, this each housing 11 and 12 has heat resistance and chemical resistance. It may be manufactured by a synthetic resin having, for example, a polyphenylene sulfide resin (PPS resin) which is a kind of engineering plastic.

  On the opposite side of the opening of the valve body accommodating portion 13, that is, on the end wall on the side where the second housing 12 of the first housing 11 is attached, a shaft that leads to a later-described reduction mechanism accommodating portion 15 formed in the second housing 12. A through hole 11d is formed. The drive shaft 2 is passed through the shaft through hole 11d, and the valve body 3 is fixed to the end of the drive shaft 2 on the side protruding to the valve body housing portion 13. A bearing B1 is provided in the vicinity of the opening of the shaft through hole 11d on the valve body housing portion 13 side, and the drive shaft 2 is rotatably supported by the bearing B1. An annular seal member SL4 is provided between the drive shaft 2 and the peripheral wall of the shaft through-hole 11d in the vicinity of the opening of the shaft through-hole 11d on the speed reduction mechanism housing portion 15 side, and this seal member SL4. Accordingly, the cooling water in the valve body housing portion 13 through the shaft through hole 11d is prevented from flowing out to the second housing 12 side.

  The first housing 11 includes a substantially cylindrical motor housing portion 14 that houses the electric motor 4 adjacent to the valve body housing portion 13. The motor housing part 14 opens to the second housing 12 side, and the electric motor 4 is housed in the motor housing part 14 so that the output shaft 4c protrudes to the second housing 12 side. The electric motor 4 is configured so that the motor main body 4a is accommodated in the motor housing portion 14 of the first housing 11 via the flange portion 4b provided on the output shaft 4c side of the housing of the motor main body 4a. It is fixed to the opening edge by a plurality of bolts BT2. The electric motor 4 is controlled by an on-board electronic controller (not shown), and the valve body 3 is rotationally driven according to the driving state of the vehicle, thereby realizing appropriate distribution of the cooling water to the radiator RD and the like.

  The first housing 11 is fixed to an engine (not shown) by a plurality of bolts (not shown) via a first flange portion 11 a provided so as to extend to the outer peripheral area of the opening of the valve body housing part 13. The The first flange portion 11 a is formed with an introduction port 10 that communicates with the inside of the engine and serves as a main communication port for introducing cooling water from the inside of the engine. The opening of the valve body housing portion 13 is formed in the introduction port 10. Communicates.

  The valve body 3 housed in the valve body housing part 13 is formed in a hollow shape as will be described later, and the opening end formed on one end side in the rotation axis Z direction is from the valve body housing part 13 to the inlet 10 side. It is provided at a position protruding slightly. Thereby, the cooling water introduced from the inlet 10 is guided to the inner passage 17 formed on the inner peripheral side of the valve body 3. Further, the valve body 3 is provided with a bearing B2 on the inner peripheral side of the introduction port 10, and the outer periphery of the opening end on one end side in the rotation axis Z direction is rotatably supported by the bearing B2. .

  In addition, a plurality of substantially cylindrical through holes that communicate with the valve body housing portion 13 from the outside and are connected to the pipes L1 to L3 are formed as discharge ports E1 to E3 at predetermined positions on the peripheral wall of the first housing. Has been. The discharge port E1 is used for supplying cooling water to the heating heat exchanger HT, for example, via the pipe L1. Similarly, the discharge port E2 is used for supplying cooling water to the oil cooler OC, for example, via the pipe L2. In addition, the discharge port E1 and the discharge port E2 are spaced apart and arranged in parallel on the peripheral wall of the first housing 11 in the direction of the rotation axis Z of the valve body 3. The discharge port E3 is disposed so as to face the discharge port E1 and the discharge port E2 through the valve body accommodating portion 13, and is used for circulating cooling water to the radiator RD, for example, through the pipe L3. Here, when the discharge ports E1 to E3 are in the connection relationship described above, the discharge port E3 is configured to have a larger diameter than the discharge port E1 and the discharge port E2. In this case, it is desirable that the discharge port E1 has a larger diameter than the discharge port E2.

  And when the electric motor 4 controls the rotation phase of the valve body 3, the below-mentioned opening part M1-M3 and the discharge ports E1-E3 which were formed in the valve body 3 in the shape corresponding to the discharge ports E1-E3. The degree of overlap changes. For example, when the valve body 3 is controlled at a position where at least a part of the discharge port E1 and the opening M1 overlaps, the cooling water flowing into the inner passage 17 is distributed to the pipe L1 through the opening M1 and the discharge port E1. The Similarly, when the valve body 3 is controlled at a position where at least a part of the discharge port E2 and the opening M2 overlaps, the valve body 3 is positioned at a position where the discharge port E2 and at least a part of the opening M3 overlap. Is controlled, the cooling water is distributed to the pipes L3. The cooling water flowing into the inner passage 17 is also led to an outer passage 18 formed between the valve body 3 and the first housing 11 from a plurality of communication ports 3c described later, and the outer periphery of the valve body 3 and the valve It is filled with the body accommodating part 13.

  As shown in FIGS. 3 and 5, the second housing 12 has a concave shape that is open so that the side facing the first housing 11 covers the valve body housing portion 13 and the motor housing portion 14 and covers both of them. The speed reducing mechanism accommodating portion 15 that accommodates the speed reducing mechanism 5 is configured by the concave internal space. The second housing 12 is fixed to the first housing 11 by a plurality of bolts BT1 via a second flange portion 12a provided so as to extend to the outer peripheral area of the opening. In addition, a seal member SL3 is interposed at a joint portion between the first housing 11 and the second housing 12, and the inside of the speed reduction mechanism housing portion 15 is held substantially airtight.

  The speed reduction mechanism 5 is a drive mechanism including a first gear G1 and a second gear G2, which are two staggered gears. That is, the first gear G1 is provided coaxially with the output shaft 4c of the electric motor 4, and is substantially orthogonal to the first screw gear WG1 that rotates integrally with the output shaft 4c and the output shaft 4c of the electric motor 4. The first inclined gear HG1 is fixed to the intermediate shaft 30 and is engaged with the first screw gear WG1. The second gear G2 is fixed to the intermediate shaft 30 and rotates together with the first inclined gear HG1, and the second worm gear WG2 is fixed to the drive shaft 2 and meshes with the second worm gear WG2. HG2. With such a configuration, the rotational driving force output from the output shaft 4c of the electric motor 4 is transmitted to the valve body 3 after being decelerated in two stages through the first gear G1 and the second gear G2.

  FIG. 6 is an enlarged cross-sectional view in which the vicinity of the valve body housing part 3 in FIG. 5 is enlarged and displayed.

  Sealing means for hermetically sealing the space between the discharge ports E1 to E3 and the valve body 3 is provided on the inner peripheral side of the first discharge port E1, the second discharge port E2, and the third discharge port E3. That is, the sealing means is composed of cylindrical sealing members S1 to S3 made of elastic synthetic resin, metal coil springs SP1 to SP3, and elastic synthetic resin O-ring SL2. Yes.

  The seal members S1 to S3 are accommodated and disposed on the inner peripheral side of the discharge ports E1 to E3, and are provided so as to be movable forward and backward toward the valve body 3 side. The coil springs SP1 to SP3 are seated on seating portions L1a, L2a, and L3a provided in openings on the side to which the pipes L1 to L3 of the discharge ports E1 to E3 are connected, and the seating portions L1a, L2a, and L3a. And an urging member that urges the sealing members S1 to S3 toward the valve body 3 respectively, with a predetermined set load between the end surfaces of the sealing members S1 to S3 on the pipes L1 to L3 side. The O-ring SL2 is provided between the inner peripheral surface of the discharge ports E1 to E3 and the outer peripheral surface of the seal members S1 to S3 so as to be accommodated in a recess formed in the outer peripheral surface of the seal members S1 to S3. The space between the discharge ports E1 to E3 and the seal members S1 to S3 is sealed by sliding contact with the inner peripheral surfaces of the discharge ports E1 to E3.

  The seal members S1 to S3 are formed with substantially conical tapered seal surfaces S1a to S3a in sliding contact with seal sliding contact portions D1 to D3 (described later) on the inner peripheral side of the end on the valve body 3 side. On the other hand, substantially flat seating surfaces S1b to S3b on which end portions of the coil springs SP1 to SP3 are seated are formed on the end surfaces of the seal members S1 to S3 on the pipes L1 to L3 side. The seal surfaces S1a to S3a have a so-called line contact in which a substantially middle portion in the thickness direction (diameter direction) (specifically, a point F shown in FIG. ~ D3 is in sliding contact. In the present embodiment, the sliding contact portions between the seal surfaces S1a to S3a and the valve body 3 when the valve is closed are configured to be inside the openings M1 to M3 described later in the rotation axis Z direction of the valve body 3. Has been.

  In the present embodiment, the seal members S1 to S3 are made of tetrafluoroethylene resin (PTFE resin), which is a kind of synthetic resin material, but the seal members S1 to S3 have a low friction. It is also possible to use a synthetic resin material other than PTFE resin as long as it has excellent properties.

  7A and 7B are views showing the appearance of the valve body 3. FIG. 7A is a perspective view of the valve body 3, and FIG. 7B is a side view of the valve body 3. FIG.

  The valve body 3 is formed by injection molding a polyphenylene sulfide resin (PPS resin) which is a kind of synthetic resin material. The valve body 3 is not limited to the PPS resin as long as it is a synthetic resin excellent in heat resistance and chemical resistance, and may be manufactured from other synthetic resin materials.

  Further, a flow for allowing cooling water introduced from the introduction port 10 of the first housing 11 to flow into the inner peripheral side passage 17 on the end surface of the valve body 3 on one end side (downward in FIG. 5) in the rotation axis Z direction. An inlet 3a is formed. On the other hand, an end wall 3b is provided on the other end side of the valve body 3 (upward in FIG. 5). In the end wall 3b, a plurality of substantially circular communication ports 3c that allow the inner passage 17 and the outer passage 18 to communicate with each other are formed along the rotation direction of the valve body 3 (the direction around the rotation axis Z). . Furthermore, a cylindrical shaft fixing portion 3d for fixing to the drive shaft 2 is provided at the center of the end wall 3b. A metal insert member 3e is integrally formed on the inner peripheral side of the shaft fixing portion 3d, and the valve body 3 is fixed to the drive shaft 2 by press-fitting the drive shaft 2 into the insert member 3e. It has become so.

  Further, the outer peripheral surface of the valve body 3, that is, the outer surface in the radial direction of the valve body 3 (the direction orthogonal to the rotation axis Z) has a substantially spherical shape in the portion that is in sliding contact with the seal members S1 and S2 when the valve body 3 rotates. Is formed. Similarly, the portion that comes into sliding contact with the seal member S3 when the valve body 3 rotates is also formed in a substantially spherical shape. In the following description, for the sake of convenience, the portion that is in sliding contact with the seal members S1 to S3 is referred to as a seal sliding contact portion (seal sliding contact portion D1 to D3). On the other hand, the portion that does not slidably contact the seal member S1 when the valve body 3 rotates is referred to as a non-seal sliding portion UA1, and similarly, the portion that does not slidably contact the seal member S2 when the valve body 3 rotates. These are called UA2a and UA2b. In the present embodiment, the seal sliding contact portions D1 and D2 are formed side by side in the direction of the rotation axis Z of the valve body 3. On the other hand, the seal sliding contact portion D3 is formed on the side wall on the opposite side in the radial direction from the seal sliding contact portions D1 and D2.

  The seal sliding contact portion D <b> 1 is formed on the outer peripheral surface of the valve body 3 over almost a half circumference in the circumferential direction. The seal sliding contact portion D1 overlaps the discharge port E1 in the rotation axis Z direction of the valve body 3 with almost no excess and deficiency, and has an opening M1 that is slightly narrower than the inner diameter of the discharge port E1 and extends in the circumferential direction. Is formed. Similarly, the seal sliding contact portions D2 and D3 are also formed on the outer peripheral surface of the valve body 3 over almost a half circumference in the circumferential direction. The seal sliding contact portion D2 has an opening M2 that overlaps the discharge port E2 in the direction of the rotation axis Z of the valve body 3 without excess or deficiency, and that is slightly narrower than the inner diameter of the discharge port E2 and extends in the circumferential direction. Is formed. In addition, the seal sliding contact portion D3 is formed with an opening portion M3 that overlaps the discharge port E3 in the direction of the rotation axis Z of the valve body 3 with almost no excess and is slightly narrower than the inner diameter of the discharge port E3.

  8 is a cross-sectional view of the valve body 3, FIG. 8A is a cross-sectional view taken along the line AA in FIG. 7B, and FIG. 8B is a cross-sectional view of FIG. It is sectional drawing cut | disconnected along the -B line.

  In FIG. 8A, a region indicated by D1 is a region where the seal sliding contact portion D1 is formed. When the entire seal sliding contact surface S1a of the seal member S1 is located within the region indicated by C1a, the first discharge port E1 is closed. On the other hand, when at least a part of the seal sliding contact surface S1a covers the region OA1 and the inner diameter portion of the discharge port E1 overlaps the opening M1, the inner passage 17 and the pipe L1 communicate with each other, and the first discharge port E1 is opened. It becomes a state of excuse. Hereinafter, in the seal sliding contact portion D1, the area C1a is referred to as a closed area, and the area OA1 is referred to as an open area.

  At the outer peripheral wall end that becomes the boundary with the opening area OA1 (opening M1) of the closed area C1a, the inner end wall M1b formed on the inner peripheral side and the chamfering that chamfers the edge portion of the inner end wall M1b. A seal guide portion M1a is formed which is inclined inward in the radial direction of the valve body 3 from the outer peripheral surface C1aD1 to the chamfered portion M1c and gradually decreases in thickness as the chamfered portion M1c is approached. In addition, an end wall portion M1d that is inclined from the peripheral wall portion C1bD1 side formed in the non-seal sliding portion UA1 toward the open region OA1 side is formed at the outer peripheral wall end portion of the opening region OA1 opposite to the closed region C1a. Is formed.

  The angle formed by the outer peripheral surface C1aD1 and the seal guide part M1a forming the closed region C1a and the angle formed by the peripheral wall part C1bD1 and the end wall part M1d adjacent to the end wall part M1d are obtuse angles. Further, the angle formed by the outer peripheral surface C1aD1 of the closed region C1a and the seal guide portion M1a is formed larger than the angle formed by the peripheral wall portion C1bD1 and the end wall portion M1d adjacent to the end wall portion M1d. The inner end wall portion M1b and the end wall portion M1d are provided in a tapered shape so as to form a draft in the mold dividing direction when the valve body 3 is molded.

  As for the seal sliding contact portion D2, as in the seal sliding contact portion D1, a seal guide portion M2a is formed at the outer peripheral wall end located at the boundary between the closed region C2a and the opening region OA2 (opening portion M2). Further, an end wall portion M2d that is inclined from the peripheral wall portion C2bD2 side formed in the non-seal sliding portion UA2a toward the open region OA2 side is formed at the end portion of the peripheral wall opposite to the closed region C2a of the opening region OA2. Is formed. The seal sliding contact portion D3 is not provided with a seal guide portion at the end of the outer peripheral wall located at the boundary between the closed regions C3a, C3b and the opening region OA3 (opening portion M3). Can be provided as needed.

  FIG. 9 is a cross-sectional view taken along the line BB in FIG. 7B, and is an enlarged cross-sectional view of a main part for explaining a specific operation state of the control valve CV. Below, based on FIG. 9, the behavior of the sealing member S2 when the valve body 3 is rotationally driven by the electric motor 4 will be described.

  As shown in FIG. 9A, the valve element 3 is rotated clockwise (from right to left in the figure) from the state where the closed region C2a of the seal sliding contact portion D2 and the seal surface S2a of the seal member S2 are in stable contact. ), Since the seal member S2 is urged in the direction of the valve body 3 by the coil spring SP2, based on the sliding resistance generated between the seal surface S2a and the valve body 3, A counterclockwise reaction force is received from the valve body 3. In this state, as shown in FIG. 9B, when a part of the seal surface S2a of the seal member S2 is applied to the opening M2, the seal member S2 is caused by the counterclockwise reaction force received from the valve body 3. It inclines in the moving direction (left direction in the figure) of the valve body 3 (the seal sliding contact portion D2).

  On the other hand, as shown in FIG. 9C, when the valve body starts to rotate counterclockwise with the entire sealing surface S2a of the sealing member S2 being in the opening area OA2, the sealing member S2 Since the seal surface S2a is in sliding contact with the valve body 3 on the outer side in the width direction (front side and back side in the drawing), the valve body 3 (seal sliding contact) receives a reaction force in the clockwise direction from the valve body 3. The part D2) is inclined in the moving direction (right direction in the figure). Furthermore, when the valve body 3 continues to rotate counterclockwise, the outer peripheral edge S2a 'of the seal surface S2a comes into contact with the seal guide portion M2a as shown in FIG. 9 (d). Then, as shown in FIG. 9 (e), the seal member S 2 tilted to the right in the figure receives a tangential force Fa with respect to the rotation axis Z of the valve element 3, and this tangential force Fa Is received by the seal member lifting force Fb in the lower left direction in the figure which is disassembled by the seal guide portion M2a. As a result, as shown in FIG. 9 (f), the seal member S2 rotates counterclockwise based on the seal member lifting force Fb, and the inclination of the seal member S2 (the inclination in the right direction in the figure). ) Is corrected.

  Further, since the seal guide portion M2a and the peripheral wall portion C2bD2 of the seal sliding contact portion D2 in the closed region C2a are connected with a gentle change of an obtuse angle, the seal member S2 is not easily lost at this connection portion. Since the behavior of the seal member S1 is the same as that of the seal member S2, a specific description is omitted. The behavior of the seal member S3 is omitted since the seal guide portion is not provided between the closed regions C3a and C3b of the seal sliding contact portion D3 and the opening region OA3, but the seal sliding contact portion D3 is omitted. The behavior of the seal member S3 when the seal guide portion is provided between the closed regions C3a, C3b and the opening region OA3 is the same as that of the seal member S2.

  In the conventional control valve, when the seal member comes into contact with the closed region of the seal sliding contact portion in a state where the seal member is inclined in one direction due to the influence of the rotation operation of the valve body, Colliding with the peripheral wall end portion serving as the boundary from a substantially perpendicular direction, the seal member may be damaged by receiving a strong force from the peripheral wall end portion, and the sealing performance may be impaired.

  On the other hand, in the control valve CV according to the present embodiment, the seal guide portions M1a and M2a are provided at portions where the seal members S1 and S2 are slidably contacted in the rotation direction of the valve body 3. As a result, the reaction force from the seal guide portions M1a and M2a acts when the seal members S1 and S2 inclined in one direction abut against the seal guide portions M1a and M2a, and the seal member S1 inclined in the one direction, The slope of S2 can be corrected.

  Moreover, the seal members S1 and S2 pass (cross) the connection portions between the seal guide portions M1a and M2a connected at a gentle angle such as an obtuse angle and the closed regions C1a and C2a of the seal sliding contact portions D1 and D2. Therefore, the durability of the seal members S1 and S2 can be improved by the connecting portion. Thereby, the fall of the sealing performance between the valve body 3 and sealing member S1, S2 can be suppressed.

  Further, since the seal guide portions M1a and M2a are formed over the entire width direction of the openings M1 and M2, when the seal members S1 and S2 come into contact with the seal guide portions M1a and M2a, the seal is stably sealed. The inclination of the members S1 and S2 can be corrected.

[Second Embodiment]
FIG. 10 shows a second embodiment of the control valve according to the present invention, and shows the shapes of the seal guide portions M1a and M2a continuously connected to the peripheral wall portions C1aD1 and C2aD2 according to the first embodiment. Represents a change. FIG. 11 shows a state in which seal members S1 and S2 respectively corresponding to the cross-sectional views of the valve body 3 cut along the lines AA and BB in FIG. 10 are arranged. In the present embodiment, the configuration other than seal guide portions M1aa and M2aa described later is the same as that in the first embodiment.

  In the present embodiment, the seal guide portions M1aa and M2aa shown by hatched areas in FIG. 10 are shown in FIG. 11 instead of the inclined shapes (see M1a and M2a in FIG. 6) exemplified in the first embodiment. Thus, it is formed in the curved surface shape of the cross-section circular arc shape in which the curvature becomes a constant radius R in the circumferential direction with respect to the rotation axis Z of the valve body 3.

  According to the configuration of this embodiment, when the outer peripheral edges S1a ′ and S2a ′ of the seal members S1 and S2 pass through the seal guide portions M1aa and M2aa, the seal guide portions M1aa and M2aa have the curved surface shape. The durability of the outer peripheral edges S1a ′ and S2a ′ of the seal members S1 and S2 and the seal surfaces S1a and S2a can be improved, and the good sealability of the seal members S1 and S2 can be maintained.

[Third Embodiment]
FIG. 12 shows a third embodiment of the control valve according to the present invention, and shows a modified shape of the outer peripheral edges S1a ′ and S2a ′ of the seal members S1 and S2 according to the second embodiment. ing. FIG. 12 shows only the seal member S2 according to the present embodiment, and the configuration other than the outer peripheral edge S2a′r of the seal member S2 described later is the same as that of the second embodiment.

  In the present embodiment, the shape of the outer peripheral edge S2a'r of the seal member S2 is not an angular shape as exemplified in the second embodiment, but a curved surface shape having an arcuate cross section having a constant radius R '. It is formed to become.

  According to the configuration of this embodiment, when the outer peripheral edge S2a'r of the seal member S2 passes through the curved-surface-shaped seal guide portion M2aa, the outer peripheral edge S2a'r of the seal member S2 has the curved surface shape. Therefore, the durability of the outer peripheral edge S2a'r of the seal can be further improved, and good sealing performance of the seal member S2 is maintained.

  In the present embodiment, the seal member S2 has been described as a representative example, but the outer peripheral edge S1a'r of the seal member S1 is formed so as to have a curved shape with a radius R 'having a constant curvature as described above. Also good.

  Further, even when the outer peripheral edges S1a'r and S2a'r of the sealing members S1 and S2 are chamfered in an inclined shape, the same effect as in the present embodiment can be obtained.

  Furthermore, even if the seal members S1 and S2 in which the outer peripheral edges S1a'r and S2a'r of the seal members S1 and S2 illustrated in the present embodiment are curved surfaces are applied to the first embodiment, the same effect can be obtained. Can be obtained.

[Fourth Embodiment]
FIG. 13 shows a control valve according to a fourth embodiment of the present invention, in which the seal guide portions M1a and M2a according to the first embodiment are formed in a protruding shape. FIG. 14 shows a state in which seal members S1 and S2 corresponding to the cross-sectional views of the valve body 3 cut along the lines AA and BB in FIG. 13 are arranged. In this embodiment, the configuration other than the protrusion Pm1 formed with a seal guide part M1a ′ and the protrusion Pm2 formed with a seal guide part M2a ′, which will be described later, is the same as that of the first embodiment.

  In the present embodiment, both end portions in the rotation axis Z direction of the valve body 3 of the valve body 3 of the seal guide portion M1a illustrated in the first embodiment are removed, and the protrusion Pm1 protruding in the circumferential direction of the valve body 3 is formed in the opening M1. The valve body 3 is formed at the center of the rotation axis Z direction. The outer peripheral surface of the protrusion Pm1 is formed continuously to the right side of the peripheral wall portion C1aD1 (the right side in the circumferential direction of the valve body 3 in FIG. 14A), and the thickness of the outer peripheral wall becomes closer to a chamfered portion M1c ′ described later. And a chamfered portion M1c ′ formed continuously at the right side of the seal guide portion M1a ′ and formed at the tip of the protrusion Pm1, and a chamfered portion M1c ′. And an inner end wall portion M1b ′ formed continuously on the right side of the.

  Similarly, both end portions of the seal guide portion M2a ′ in the rotation axis Z direction of the valve body 3 are removed, and the protrusions Pm2 protruding in the circumferential direction of the valve body 3 are in the rotation axis Z direction of the valve body 3 in the opening M1. It is formed in the central part. The outer peripheral surface of the protrusion Pm2 is formed continuously with the right side of the peripheral wall C2aD2 (the right side in the circumferential direction of the valve body 3 in FIG. 14B), and the outer peripheral wall becomes closer to an inner end wall M2b ′ described later. The seal guide portion M2a ′ has an inclined shape with a gradually decreasing thickness, and an inner end wall portion M2b ′ formed continuously with the right side of the seal guide portion M2a ′.

  According to the configuration of this embodiment, since the width dimension of the seal guide portions M1a 'and M2a' in the rotation axis Z direction can be reduced, the opening range of the openings M1 and M2 can be further expanded. Further, since the opening range of the openings M1 and M2 is expanded, more cooling water can be supplied in the initial state where the openings M1 and M2 start to open, and the valve body 3 can be reduced in size and the control valve CV. It is used to improve the mounting ability.

[Fifth Embodiment]
FIG. 15 shows a control valve according to a fifth embodiment of the present invention, and shows a modified configuration of the protrusions Pm1, Pm2 according to the fourth embodiment. FIG. 16 shows a state in which seal members S1 and S2 corresponding to the cross-sectional views of the valve body 3 cut along the lines AA and BB in FIG. It is. In the present embodiment, the configurations other than the upper and lower projections Pm1u and Pm1l and the upper and lower projections Pm2u and Pm2l described later are the same as those in the fourth embodiment.

  In the present embodiment, the protrusions Pm1 and Pm2 exemplified in the fourth embodiment are not formed in the central portion in the axial direction of the openings M1 and M2, but in the rotation axis Z direction of the valve body 3 in the openings M1 and M2. One upper projection Pm1u, one lower projection Pm1l, one upper projection Pm2u, and one lower projection Pm2l are formed one above and one below.

  The outer peripheral surface of the upper protrusion Pm1u is formed continuously to the right side of the peripheral wall C1aD1 (the right side in the circumferential direction of the valve body 3 in FIG. 16A) and approaches a first upper side chamfer M1c'u described later. The first upper seal guide portion M1a′u having an inclined shape in which the thickness of the outer peripheral wall gradually decreases as the outer peripheral wall gradually decreases, and the right side of the first upper seal guide portion M1a′u is formed continuously with the first upper protrusion portion Pm1u. A first upper side chamfer M1c'u formed at the tip, and a first upper end wall M1b'u formed continuously on the right side of the first upper side chamfer M1c'u.

  Similarly, the outer peripheral surface of the first lower protrusion Pm1l is formed continuously with the right side of the peripheral wall C1aD1 (the right side in the circumferential direction of the valve body 3 in FIG. 16A), and the first lower side surface to be described later is removed. The first lower seal guide portion M1a'l having an inclined shape in which the thickness of the outer peripheral wall gradually decreases as it approaches the portion M1b'l, and the right side of the first lower seal guide portion M1a'l is formed continuously. The first lower side end wall formed continuously with the right side of the first lower side chamfered portion M1c′l and the first lower side chamfered portion M1c′l formed at the tip of the first lower projection Pm1l. Part M1b'l. Note that a gap is formed between the first upper protrusion Pm1u and the first lower protrusion Pm1l.

  Similarly to the opening M1, the outer peripheral surface of the second upper protrusion Pm2u is formed continuously with the right side of the peripheral wall C2aD2 (the right side in the circumferential direction of the valve body 3 in FIG. 16B). (2) An inclined second upper seal guide portion M2a'u whose outer peripheral wall thickness gradually decreases as it approaches the upper side chamfer M2c'u, and a right side of the second seal guide portion M2a'u. A second upper side chamfer M2c'u formed at the tip of the second upper side projection Pm2u and a second upper end wall formed continuously on the right side of the second upper side chamfer M2c'u. M2b'u.

  Similarly, the outer peripheral surface of the second lower protrusion Pm2l is formed continuously with the right side of the peripheral wall C2aD2 (the right side in the circumferential direction of the valve body 3 in FIG. 16B), and the second lower side surface to be described later is removed. The second lower seal guide portion M2a'l having an inclined shape in which the thickness of the outer peripheral wall gradually decreases as it approaches the portion M2b'l, and the right side of the second lower seal guide portion M2a'l is formed continuously. The second lower side end wall formed continuously with the right side of the second lower side chamfered part M2c′l and the second lower side chamfered part M2c′l formed at the tip of the second lower projection Pm2l Part M2b'l. Note that a gap is formed between the second upper protrusion Pm2u and the second lower protrusion Pm2l.

  According to the configuration of this embodiment, the surface that abuts on the outer peripheral edge S1a ′ of the seal member S1 or the seal surface S1a and corrects the inclination of the seal member S1 is arranged in the direction of the rotation axis Z of the valve body 3 at the opening M1. By providing the outer peripheral surfaces of the first upper protrusion Pm1u and the first lower protrusion Pm1l formed vertically, that is, the first upper seal guide part M1a′u and the first lower seal guide part M1a′l, The inclination of the valve body 3 can be corrected more stably than in the fourth embodiment.

  In addition, in this embodiment, the opening range of the opening M1 can be expanded by the amount of the gap formed between the first upper protrusion Pm1u and the first lower protrusion Pm1l than in the first embodiment. . As a result, more cooling water can be supplied, and the valve body 3 can be reduced in size and the mountability of the control valve CV can be improved.

  The effects of the second upper protrusion Pm1u and the second lower protrusion Pm2l provided in the opening M2 are the same as those of the first upper protrusion Pm1u and the first lower protrusion provided in the opening M1. Since it is the same as that of Pm1l, a specific description is omitted.

  The present invention is not limited to the configuration according to each of the above embodiments, and the specific configuration of the control valve CV is not limited to the configuration of the product to be controlled as long as it can achieve the above-described effects of the present invention. It can be changed freely according to the specifications.

  For example, in each of the above-described embodiments, the control valve CV is described as an example of a control valve used for controlling the flow rate of cooling water or switching the flow path. However, the control target is not limited to cooling water, but a fluid or gas such as oil. It is also possible to apply to what controls etc.

  In each of the above embodiments, the valve body 3 formed of a synthetic resin material has been described as an example. However, the valve body 3 may be formed of a metal material such as an aluminum alloy. In addition, when the valve body 3 is shape | molded with the metal material, there exists a merit which can improve the durability of the said valve body 3 further.

  Furthermore, in each said embodiment, although the recessed part was formed in sealing member S1-S3 and O-ring SL2 was arrange | positioned in this recessed part, a recessed part is formed in the internal peripheral surface of discharge port E1-E3, and this recessed part is formed. It is good also as a structure which arrange | positions O-ring SL2.

  In addition, in each of the above-described embodiments, the valve body 3 is described with the seal guide portions M1a and M2a provided on one side in the circumferential direction of the openings M1 and M2, but the seal guide portions M1a and M2a are The openings M1 and M2 may be provided on the other circumferential side (for example, between the peripheral wall portions C1bD1 and C2bD2 and the end wall portions M1d and M2d), and further provided on both sides in the circumferential direction of the openings M1 and M2. It may be done.

  As the control valve based on the embodiment described above, for example, the following modes can be considered.

  That is, the control valve, in one aspect thereof, is rotatable in the valve body housing portion, a housing having a hollow valve body housing portion, a communication port communicating with the valve body housing portion, and the valve body housing portion. A valve body that is pivotally supported and has an opening on the outer peripheral surface, and is provided between the communication port in the valve body housing portion and the outer peripheral surface of the valve body, and the opening according to the rotational phase of the valve body A seal member urged to the outer peripheral surface of the valve body so as to communicate with the communication port, and the opening and / or the outer peripheral surface of the valve body in sliding contact with the seal member in the rotation direction of the valve body And a chamfered portion provided on an outer peripheral edge of the seal member that is in sliding contact with the seal member.

  In a preferred aspect of the control valve, the chamfered portion is formed in a range of the opening in the rotation axis direction of the valve body.

  In another preferable aspect, in any one of the aspects of the control valve, the chamfered portion is formed so as to be inclined inward in the radial direction of the valve body from the outer peripheral surface of the valve body.

  In still another preferred embodiment, in any one of the control valve embodiments, an angle formed by the chamfered portion and the outer peripheral surface of the valve body is an obtuse angle.

  In still another preferred aspect, in any one of the control valve aspects, the chamfered portion has a curved surface shape.

  In still another preferred aspect, in any one of the aspects of the control valve, the chamfered portion includes a protrusion that extends from the opening in the rotation direction of the valve body.

  In still another preferred aspect, in any one of the aspects of the control valve, the protrusion is formed at a central portion of the valve body in the rotation axis direction in the opening.

  In still another preferred aspect, in any one of the aspects of the control valve, one protrusion is provided at each of one end and the other end in the rotation axis direction of the valve body in the opening. .

  In still another preferred aspect, in any one of the aspects of the control valve, the chamfered portion is formed in a curved surface shape on the outer peripheral edge of the seal member that is in sliding contact with the outer peripheral surface of the valve body.

  From another point of view, in one aspect, the control valve includes a housing having a valve body housing portion formed in a hollow shape, a communication port communicating with the valve body housing portion, and the valve body housing. A bottom portion provided rotatably on one side of the rotation direction, a peripheral wall portion provided on one side of the rotation direction from the outer periphery of the bottom portion, and an opening provided on the peripheral wall portion and communicating with the communication port A valve body having a port and a lifting portion provided at an edge of the opening port in the rotation direction of the valve body, and provided between the valve body housing portion and the valve body, And a seal member that seals between the housing and is lifted radially outward of the valve body by the lifting portion.

  From another viewpoint, in one aspect, the control valve is rotatably disposed in the valve chamber, a housing having a hollow valve chamber and a port communicating with the valve chamber. A hole that can communicate with the port by rotating; a first chamfered portion provided on one side of the hole in the rotational direction; and a second chamfered portion provided on the other side of the hole in the rotational direction. And a sealing member that is disposed between the valve chamber and the valve body and seals between the valve body and the housing, and is continuous with the first chamfered portion. An angle formed by the outer peripheral surface of the valve body is larger than an angle formed by an outer peripheral surface of the valve body that is continuous with the second chamfered portion.

DESCRIPTION OF SYMBOLS 1 ... Housing, 13 ... Valve body accommodating part, E1-E3 ... Discharge port (communication port), 3 ... Valve body, M1-M3 ... Opening part, M1a ... Seal guide part (chamfering part, seal lifting part), M2a ... Seal guide part (chamfered part, seal lifting part), M1aa ... Seal guide part (chamfered part, seal lifting part), M2aa ... Seal guide part (chamfered part, seal lifting part), M1a '... Seal guide part (chamfered part, chamfered part, Seal lifting portion), M2a '... seal guide portion (chamfered portion, seal lifting portion), M1a'u ... first upper seal guide portion (chamfered portion, seal lifting portion), M1a'l ... first lower seal guide portion (Chamfered portion, seal lifting portion), M2a'u ... Second upper seal guide portion (Chamfered portion, seal lifting portion), M2a'l ... Second lower seal guide portion (Chamfered) , Seal lifting unit), S1 to S3 ... sealing member (sealing member, a sealing member)

Claims (11)

A housing having a hollow valve body housing portion and a communication port communicating with the valve body housing portion;
A valve body rotatably supported in the valve body housing section and having an opening on the outer peripheral surface;
The outer periphery of the valve body is provided between the communication port in the valve body housing portion and the outer peripheral surface of the valve body, and communicates the opening and the communication port according to the rotational phase of the valve body. A seal member biased against the surface;
A chamfered portion provided on an outer peripheral edge of the seal member in sliding contact with the opening and / or an outer peripheral surface of the valve body in sliding contact with the seal member in a rotation direction of the valve body;
A control valve comprising: The control valve according to claim 1,
The control valve according to claim 1, wherein the chamfered portion is formed in a range of the opening in the rotation axis direction of the valve body. The control valve according to claim 2,
The control valve is characterized in that the chamfered portion is formed to be inclined from the outer peripheral surface of the valve body inward in the radial direction of the valve body. The control valve according to claim 3,
An angle formed by the chamfered portion and the outer peripheral surface of the valve body is an obtuse angle. The control valve according to claim 2,
The control valve, wherein the chamfered portion has a curved surface shape. The control valve according to claim 1,
The control valve according to claim 1, wherein the chamfered portion includes a protrusion that extends from the opening in the rotation direction of the valve body. The control valve according to claim 6,
The control valve according to claim 1, wherein the protrusion is formed at a central portion in the rotation axis direction of the valve body in the opening. The control valve according to claim 6.
1. The control valve according to claim 1, wherein one protrusion is provided at each of one end and the other end in the rotation axis direction of the valve body in the opening. The control valve according to claim 1,
The control valve, wherein the chamfered portion is formed in a curved shape on an outer peripheral edge of the seal member that is in sliding contact with an outer peripheral surface of the valve body. A housing having a hollow valve body accommodating portion and a communication port communicating with the valve body accommodating portion;
A bottom portion rotatably disposed in the valve body housing portion and provided on one side in the rotation direction, a peripheral wall portion provided on one side in the rotation direction from an outer periphery of the bottom portion, and the communication port provided in the peripheral wall portion An opening port communicating with the valve body, and a lift body provided at an end edge of the opening port in the rotation direction of the valve body,
A seal member that is provided between the valve body housing portion and the valve body, seals between the valve body and the housing, and is lifted radially outward of the valve body by the lifting portion;
A control valve comprising: A housing having a hollow valve chamber, and a port communicating with the valve chamber;
A hole portion rotatably disposed in the valve chamber and capable of communicating with the port by rotating, a first chamfered portion provided on one side of the rotation direction in the hole portion, and the other of the rotation direction in the hole portion. A valve body having a second chamfered portion provided on the side;
A sealing member that is disposed between the valve chamber and the valve body and seals between the valve body and the housing;
With
An angle formed between the first chamfered portion and the outer peripheral surface of the valve body that is continuous is greater than an angle formed between the second chamfered portion and the outer peripheral surface of the valve body that is continuous.

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