JP7060657B2 - Valve gears and automotive heat medium systems - Google Patents

Description

The present invention relates to valve devices and automotive heat medium systems .

Conventionally, a flow control valve having a rotating valve body is known (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2004-76647

In the conventional flow control valve , there is a need to improve the durability of the regulation part that regulates the rotation of the valve body.
One of an object of the present invention is to provide a valve device and an automobile heat medium system capable of improving the durability of a regulatory unit .

In the valve device according to the embodiment of the present invention, the valve device is provided on the surface of the bottom surface facing the first communication port, and is inclined so that the diameter increases in the direction away from the first communication port from the center of the bottom toward the outer peripheral side. A restricting portion provided on the inclined portion and a concave portion formed on the surface of the bottom opposite to the first communication port, and having a surface extending in the axial direction of the valve body, and a regulating portion provided on the housing facing the bottom. It has a stopper that regulates the rotation range of the regulating portion.

Therefore, in the present invention, the durability of the regulation portion can be improved .

It is a schematic diagram of the cooling system 1 of Embodiment 1. It is a perspective view of MCV9 of Embodiment 1. FIG. It is an exploded perspective view of MCV9 of Embodiment 1. FIG. It is a top view of MCV9 of Embodiment 1. FIG. FIG. 5 is a cross-sectional perspective view taken along the line S5-S5 in FIG. It is a cross-sectional view taken along the line S5-S5 of FIG. It is a cross-sectional view taken along the line S7-S7 of FIG. FIG. 4 is a cross-sectional perspective view taken along the line S8-S8 in FIG. 4 (housing only). It is a perspective view of the rotor 12 of Embodiment 1. FIG. It is a perspective view when the rotor 12 of FIG. 9 is rotated 180 degrees. FIG. 4 is a cross-sectional view taken along the line S5-S5 of FIG. 4 in the second embodiment. FIG. 3 is a cross-sectional view taken along the line S5-S5 of FIG. 4 in the third embodiment. It is a schematic diagram of the cooling system 100 of Embodiment 4.

[Embodiment 1]
FIG. 1 is a schematic view of the cooling system 1 of the first embodiment.
In the cooling system 1 of the first embodiment, the cooling water (fluid) that cools the engine 2 that is a heat source is passed through a plurality of heat exchangers (radiator 3, transmission oil warmer 4, heater 5), and then the water pump 6 is used. It has a circuit 7 for returning to the engine 2 via the above. The engine 2 is, for example, a gasoline engine mounted on a vehicle. The radiator 3 cools the cooling water by exchanging heat between the cooling water and the running wind. The transmission oil warmer 4 cools the cooling water by exchanging heat between the cooling water and the transmission oil. The transmission oil warmer 4 functions as an oil cooler that raises the temperature of the transmission oil when the engine 2 is cold, and cools the transmission oil after the engine 2 has warmed up. The heater 5 cools the cooling water by exchanging heat between the cooling water and the air blown into the vehicle interior when the vehicle interior is heated. The water pump 6 is rotationally driven by the driving force of the engine 2 to supply cooling water from the radiator 3, the transmission oil warmer 4, and the heater 5 to the engine 2. The circuit 7 has a constantly open channel 7a for constantly circulating the cooling water by bypassing each of the heat exchangers 3, 4 and 5. A water temperature sensor 8 that detects the temperature (water temperature) of the cooling water is installed in the constantly open channel 7a. The mechanical control valve (hereinafter referred to as MCV) 9 is a flow rate control valve that adjusts the flow rate of the cooling water supplied from the engine 2 to the heat exchangers 3, 4 and 5. Details of MCV9 will be described later. The engine control unit 101 controls the valve rotation angle of the MCV9 based on the water temperature detected by the water temperature sensor 8 and the information from the engine 2 (engine negative pressure, throttle opening, etc.).

Next, the configuration of MCV9 will be described.
FIG. 2 is a perspective view of the MCV9 of the first embodiment, FIG. 3 is an exploded perspective view of the MCV9, FIG. 4 is a plan view of the MCV9, FIG. S5-S5 line cross-sectional view, FIG. 7 is S7-S7 line cross-sectional view of FIG. 4, FIG. 8 is S8-S8 line cross-sectional perspective view of FIG. 4 (housing only), and FIG. 9 is an embodiment. 1 is a perspective view of the rotor 12, and FIG. 10 is a perspective view of the rotor 12 of FIG. 9 when the rotor 12 is rotated 180 degrees.
The MCV9 has a housing 10, a drive mechanism 11, a rotor (valve body) 12, and a drive shaft 13. Hereinafter, the x-axis is set in the direction along the rotation axis of the drive shaft 13, and the direction from the drive mechanism 11 to the rotor 12 on the x-axis is the x-axis positive direction and the opposite direction is the x-axis negative direction. The radial direction of the x-axis is called the radial direction, and the direction around the x-axis is called the circumferential direction.

First, the configuration of the housing 10 will be described.
The housing 10 is formed by casting, for example, using an aluminum alloy material. The housing 10 has a base 14, a peripheral wall 15, a main communication port (first communication port) 16, a plurality of sub communication ports (second communication port) 17, and a bearing portion 18. The base 14 has a substantially disk shape perpendicular to the x-axis direction. A drive shaft 13 penetrates the center of the base 14 in the x-axis direction. A stopper 14a protruding in the positive direction of the x-axis is provided on the surface of the base 14 on the positive direction of the x-axis. The peripheral wall 15 has a substantially cylindrical shape extending from the outer periphery of the base 14 in the positive direction of the x-axis. The peripheral wall 15 has a tapered shape in which the inner diameter increases from the negative direction side of the x-axis to the positive direction side. On the inner peripheral side of the peripheral wall 15, a valve body accommodating portion 19 for accommodating the rotor 12, which is a substantially columnar space, is provided. The main communication port 16 is a circular opening formed at the x-axis positive direction end (x-axis positive direction end of the housing 10) of the peripheral wall 15 and communicates with the valve body accommodating portion 19. The main communication port 16 connects the water channel from the engine 2 to the valve body accommodating portion 19. The plurality of sub-communication ports 17 are circular openings formed in the peripheral wall 15 and communicate with the valve body accommodating portion 19. The plurality of sub-communication ports 17 are a first sub-communication port 17a, a second sub-communication port 17b, and a third sub-communication port 17c. The first sub-communication port 17a has the smallest opening area, and the third sub-communication port 17c has the largest opening area. The second sub-communication port 17b is located on the x-axis negative direction side of the first sub-communication port 17a, and the third sub-communication port 17c is located on the x-axis positive direction side of the first sub-communication port 17a. When viewed from the negative x-axis side, the second sub-communication port 17b is located 90 degrees clockwise from the first sub-communication port 17a, and the third sub-communication port 17c is to the right of the first sub-communication port 17a. It is located 180 degrees away from the circumference.

Outlets (pipes) 20a, 20b, 20c, which are pipe joints, are fixed to the radial outside of each of the sub-communication ports 17a, 17b, 17c. The first outlet 20a connects the first sub-communication port 17a and the water channel leading to the heater 5. The second outlet 20b connects the second sub-communication port 17b to the water channel leading to the transmission oil warmer 4. The third outlet 20c connects the third sub-communication port 17c and the water channel leading to the radiator 3. At the radial inner ends of the first outlet 20a and the second outlet 20b, between the outer circumference of the first outlet 20a and the second outlet 20b and the inner circumference of the first sub-communication port 17a and the second sub-communication port 17b. It is sealed with O-rings 21a and 21b. A fourth sub-communication port 17d is formed in the housing 10. The fourth sub-communication port 17d always communicates with the main communication port 16 regardless of the rotation angle of the rotor 12. The fourth outlet 20d, which is a pipe joint, is fixed to the outside of the fourth sub-communication port 17d in the radial direction. The 4th outlet 20d connects the 4th sub-communication port 17d and the constantly open channel 7a. Further, the housing 10 is formed with a fifth sub-communication port 17e. The fifth sub-communication port 17e communicates with the fourth sub-communication port 17d. The third outlet 20c is formed with a water channel (not shown) connecting the fifth sub-communication port 17e and the first sub-communication port 17a. The thermostat 22 is housed in this channel. The thermostat 22 has a fail-safe function that opens a water channel to promote cooling of the water temperature when the water temperature becomes excessively high (for example, 100 degrees or more). At the x-axis positive end of the housing 10, there are three mounting holes 23 into which bolts are inserted when bolting the MCV9 to engine 2.

The bearing portion 18 rotatably supports the drive shaft 13 with respect to the housing 10. The bearing portion 18 is formed in a substantially cylindrical shape along the x-axis direction, its x-axis negative direction end protrudes toward the x-axis negative direction side from the x-axis negative direction end of the base portion 14, and its x-axis positive direction end is the base portion. It protrudes from the x-positive end of 14 to the x-axis positive side. The x-axis positive direction end of the bearing portion 18 is located on the x-axis negative direction side of the x-axis positive direction end of the second sub-communication port 17b. A through hole 18a through which the drive shaft 13 penetrates is formed in the center of the bearing portion 18. The bearing portion 18 has a radial thrust bearing (first radial bearing) 24, a dust seal 25, a liquid-tight seal 26, and a thrust bearing 27 in the through hole 18a. The radial thrust bearing 24 is located at the x-axis negative end of the bearing portion 18 and receives radial and x-axis forces from the drive shaft 13. The dust seal 25 is located between the radial thrust bearing 24 and the liquid-tight seal 26 in the x-axis direction, and suppresses the cooling water flowing into the bearing portion 18 from entering the drive mechanism 11. The liquidtight seal 26 is located between the dust seal 25 and the thrust bearing 27 in the x-axis direction, and suppresses the outflow of cooling water from the valve body accommodating portion 19. The thrust bearing 27 is located at the x-axis positive end of the bearing portion 18 and receives a force in the x-axis direction from the drive shaft 13. The housing 10 has a relief hole 28 that connects the through hole 18a and the space on the negative side of the x-axis of the base 14. The relief hole 28 is located on the x-axis negative direction side of the stopper 14a. The relief hole 28 is for discharging the cooling water and air that have flowed into the bearing portion 18 (through hole 18a) to the outside of the housing 10, and has an inclination with respect to the x-axis. The relief hole 28 extends from the through hole 18a on the negative side of the x-axis and outward in the radial direction, and opens on the negative side of the x-axis of the base 14. The relief hole 28 extends from the through hole 18a on the negative side of the x-axis and outward in the radial direction, and opens on the negative side of the x-axis of the base 14.

Subsequently, the configuration of the drive mechanism 11 will be described.
The drive mechanism 11 is located on the x-axis negative direction side of the base 14, and rotationally drives the drive shaft 13. The drive mechanism 11 includes an electric motor 29, a motor worm 30, an intermediate gear 31, an intermediate worm 32, and a rotor gear 33. The electric motor 29 is controlled by the engine control unit 101. The electric motor 29 is housed in the housing 10 with the output shaft 29a facing the negative direction of the x-axis. The motor worm 30 rotates integrally with the output shaft 29a. The intermediate gear 31 meshes with the motor worm 30. The intermediate worm 32 is integrated with the intermediate gear 31. An intermediate shaft 34 penetrates the center of the intermediate gear 31 and the intermediate worm 32. The axis of the intermediate shaft 34 is orthogonal to the x-axis. The intermediate shaft 34 is rotatably supported around the axis by two shaft support portions 35a and 35b extending from the base 14 in the negative direction of the x-axis. The rotor gear 33 is fixed to the x-axis negative end of the drive shaft 13 and rotates integrally with the drive shaft 13. A magnet 36 is attached to the x-axis negative end of the drive shaft 13. The magnet 36 is shown only in FIG. 3, and is not shown in other drawings. The motor worm 30, intermediate gear 31, intermediate worm 32 and rotor gear 33 are housed in the gear housing 37. The gear housing 37 has an MR sensor (not shown). The MR sensor detects the rotation angle of the drive shaft 13, that is, the rotation angle of the rotor 12, based on the change in the magnetic field accompanying the rotation of the drive shaft 13. The rotation angle detected by the MR sensor is transmitted to the engine control unit 101.

Next, the configuration of the rotor 12 will be described.
The rotor 12 is housed in the valve body accommodating portion 19. The rotor 12 is formed by using, for example, a synthetic resin material. The rotor 12 has a bottom 38, an outer circumference 39, a main opening 40, a plurality of sub-openings 41 and an extension 42. The bottom 38 is located at the x-axis negative end of the rotor 12 and is perpendicular to the x-axis direction. The bottom 38 has a shape in which the range of a little over 180 degrees in the donut shape is cut out leaving only the outer peripheral portion when viewed from the negative side of the x-axis. The outer peripheral portion 39 has a substantially cylindrical shape extending from the outer circumference of the bottom portion 38 in the positive direction of the x-axis. The outer peripheral portion 39 has a tapered shape in which the inner diameter increases from the negative direction side of the x-axis to the positive direction side. The outer peripheral portion 39 has a flange portion 39a extending radially outward from the x-axis positive end of the outer peripheral portion 39. A slide bearing (second radial bearing) 44 is provided near the x-axis positive direction end of the peripheral wall 15 and on the x-axis negative direction side of the flange portion 39a. The plain bearing 44 rotatably supports the rotor 12 with respect to the housing 10. The plain bearing 44 receives a radial force from the rotor 12. The main opening 40 is a circular opening formed at the x-axis positive direction end (x-axis positive direction end of the rotor 12) of the outer peripheral portion 39, and communicates with the main communication port 16. The plurality of sub-openings 41 are openings formed in the outer peripheral portion 39, and communicate with a plurality of sub-communication ports 17a, 17b, 17c corresponding to each of the rotors 12 when they are in a predetermined rotation angle range. The plurality of openings 41 are a first sub-opening 41a, a second sub-opening 41b, and a third sub-opening 41c. The first sub-opening 41a corresponds to the first sub-communication port 17a. The second sub-opening 41b corresponds to the second sub-communication port 17b. The third sub-opening 41c corresponds to the third sub-communication port 17c. The second sub-opening 41b is located on the negative x-axis side of the first sub-opening 41a, and the third sub-opening 41c is located on the positive x-axis side of the first sub-opening 41a. The second sub-opening 41b has an elongated hole shape extending in the circumferential direction, and the first sub-opening 41a and the third sub-opening 41c have a circular shape. The length of the second sub-opening 41b in the x-axis direction is shorter than the length of the first sub-opening 41a in the x-axis direction. The opening area of the third sub-opening 41c is larger than the opening area of the second sub-opening 41b. The first sub-opening 41a has two openings 41a1, 41a2. The opening 41a1 is for summer and the opening 41a2 is for winter. The third sub-opening 41c also has two openings 41c1 and 41c2. The opening 41c1 is for summer and the opening 41c2 is for winter. The first sub-opening portion 41a (41a1, 41a2) overlaps with the first guide portion 43 in the x-axis direction.

The extending portion 42 extends from the outer periphery of the bottom portion 38 toward the positive direction side of the x-axis and is connected to the positive end of the drive shaft 13 in the x-axis direction. The extending portion 42 has a tip portion 42a, a cylindrical portion (cylindrical portion) 42b, and a second guide portion 42c. The tip portion 42a is provided at the x-axis positive direction end of the extending portion 42. The tip portion 42a is located on the x-axis positive direction side of the bearing portion 18 of the housing 10 and is fixed to the drive shaft 13. A metal insert 42d for the purpose of ensuring strength is embedded in the center of the tip portion 42a and the joint portion with the drive shaft 13. The rotor 12 is insert-molded with the insert 42d as an insert product. The x-axis positive direction side of the tip portion 42a overlaps with the first sub-communication port 17a of the housing 10 in the x-axis direction. The x-axis positive end of the tip portion 42a is on the x-axis negative direction side of the x-axis positive end of the first sub-communication port 17a, and the x-axis positive direction of the first sub-communication port 17a on the x-axis negative direction end. Located on the side. A first guide portion 43 is provided on the outer peripheral surface of the tip portion 42a. The first guide portion 43 has a tapered shape in which the radial direction increases from the positive direction side of the x-axis to the negative direction side. The cylindrical portion 42b is formed in a cylindrical shape extending from the first guide portion 43 in the negative direction on the x-axis. The inner diameter of the cylindrical portion 42b is larger than the outer diameter of the bearing portion 18. The cylindrical portion 42b overlaps the bearing portion 18 in the x-axis direction. The x-axis end of the cylindrical portion 42b is connected to the second guide portion 42c in the notched range of the bottom portion 38 in the circumferential direction, and is connected to the bottom portion 38 in other ranges. The second guide portion 42c is provided in the notched range of the bottom portion 38 in the circumferential direction, and connects the cylindrical portion 42b and the outer periphery of the bottom portion 38. The second guide portion 42c is connected to the opening peripheral edge on the negative side of the x-axis of the second sub-opening portion 41b. The second guide portion 42c has a tapered shape in which the outer shape in the radial direction increases from the positive direction side of the x-axis to the negative direction side. The bottom 38 has two connecting portions 38a, 38b that connect to the second guide portion 42c. Both connecting portions 38a and 38b extend along the x-axis direction. Both connecting portions 38a and 38b engage with the stopper 14a of the base portion 14 in the circumferential direction when the rotor 12 has a predetermined rotation angle, respectively. The rotor 12 rotates clockwise when the connection portion 38a is in contact with the stopper 14a of the base 14 when viewed from the negative side of the x-axis, and the angle range of a little less than 180 degrees until the connection portion 38b is in contact with the stopper 14a. Is rotatable.

Next, the seal portions 45, 46, 47 provided in the sub-communication ports 17a, 17b, 17c will be described.
The first seal portion 45 is provided at the first sub-communication port 17a. The first seal portion 45 provides cooling water from the first sub communication port 17a to the radial gap between the peripheral wall 15 and the outer peripheral portion 39 when the first sub communication port 17a and the first sub opening 41a communicate with each other. Suppress leaks. The first seal portion 45 has a rotor seal 45a, an O-ring 45b and a coil spring 45c. The rotor seal 45a has a cylindrical shape and is inserted into the first sub-communication port 17a. The radial inner end of the rotor seal 45a abuts on the outer peripheral portion 39. The O-ring 45b seals between the inner peripheral surface of the first sub-communication port 17a and the outer peripheral surface of the rotor seal 45a. The coil spring 45c is interposed between the rotor seal 45a and the first outlet 20a in a compressed state in a compressed state, and urges the rotor seal 45a inward in the radial direction. The second seal portion 46 is provided at the second sub-communication port 17b. The second seal portion 46 provides cooling water from the second sub communication port 17b to the radial gap between the peripheral wall 15 and the outer peripheral portion 39 when the second sub communication port 17b and the second sub opening 41b communicate with each other. Suppress leaks. The second seal portion 46 has a rotor seal 46a, an O-ring 46b and a coil spring 46c. The rotor seal 46a has a cylindrical shape and is inserted into the second sub-communication port 17b. The radial inner end of the rotor seal 46a abuts on the outer peripheral portion 39. The O-ring 46b seals between the inner peripheral surface of the second sub-communication port 17b and the outer peripheral surface of the rotor seal 46a. The coil spring 46c is interposed between the rotor seal 46a and the second outlet 20b in a compressed state in a compressed state, and urges the rotor seal 46a inward in the radial direction. The third seal portion 47 is provided at the third sub-communication port 17c. The third seal portion 47 provides cooling water from the third sub communication port 17c to the radial gap between the peripheral wall 15 and the outer peripheral portion 39 when the third sub communication port 17c and the third sub opening 41c communicate with each other. Suppress leaks. The third seal portion 47 has a rotor seal 47a, an O-ring 47b and a coil spring 47c. The rotor seal 47a has a cylindrical shape and is inserted into the third sub-communication port 17c. The radial inner end of the rotor seal 47a abuts on the outer peripheral portion 39. The O-ring 47b seals between the inner peripheral surface of the third auxiliary communication port 17c and the outer peripheral surface of the rotor seal 47a. The coil spring 47c is interposed between the rotor seal 47a and the third outlet 20c in a compressed state in a compressed state, and urges the rotor seal 47a inward in the radial direction.

Next, the action and effect of MCV9 of the first embodiment will be described.
In the MCV 9 of the first embodiment, since the extending portion 42 protrudes from the space inside the rotor 12, the flow of cooling water from the main opening 40 toward the negative side of the x-axis collides with the extending portion 42 and stagnate. Is generated, and there is concern about pressure loss of cooling water. Here, by providing the first sub-opening 41a and the second sub-opening 41b on the x-axis positive direction side of the extending portion 42, the pressure loss of the cooling water can be reduced, but the x-axis direction dimension of the rotor 12. Will increase the size of the MCV9.
Therefore, the rotor 12 of the first embodiment includes a first guide portion 43 on the outer peripheral side of the extending portion 42, whose outer shape increases in the radial direction from the positive direction side to the negative direction side of the x-axis. As a result, a flow of cooling water outward in the radial direction is formed along the shape of the first guide portion 43, and the cooling water smoothly flows from the main opening 40 to the first sub-opening 41a and the second sub-opening 41b. It flows. In addition, the collision of the flow with the extending portion 42 is suppressed, and the stagnation in the vicinity of the extending portion 42 is suppressed. As a result, the pressure loss of MCV9 can be reduced. Moreover, since it is not necessary to lengthen the x-axis direction dimension of the rotor 12, it is possible to suppress the increase in size of the MCV9.
The extending portion 42 has a cylindrical portion 42b extending from the first guide portion 43 in the negative direction on the x-axis. As a result, a part of the bearing portion 18 can be accommodated in the cylindrical portion 42b so that the bearing portion 18 overlaps with the cylindrical portion 42b in the x-axis direction, and the x-axis direction dimension of the MCV9 can be shortened.
The extending portion 42 has a second guide portion 42c that connects the cylindrical portion 42b and the outer periphery of the bottom portion 38 and increases the outer diameter in the radial direction from the positive direction side to the negative direction side of the x-axis. The second guide portion 42c is connected to the opening peripheral edge on the negative side of the x-axis of the second sub-opening portion 41b. As a result, a flow of cooling water is formed from the main opening 40 to the second sub-opening 41b along the shape of the second guide portion 42c, and the cooling water is smoothly formed from the main opening 40 to the second sub-opening 41b. Therefore, the pressure loss can be further reduced.
The rotor 12 extends in the x-axis direction and has connecting portions 38a and 38b connecting the bottom portion 38 and the second guide portion 42c. As a result, the rotation angle range of the rotor 12 can be restricted to a predetermined rotation angle range by the stopper 14a on the housing 10 side.

The first sub-opening portion 41a overlaps with the first guide portion 43 in the x-axis direction. As a result, the cooling water flows more smoothly from the main opening 40 to the first sub-opening 41a, so that the pressure loss can be further reduced.
The MCV9 has sealing portions 45, 46, 47 that suppress the leakage of cooling water from each of the sub-openings 41a, 41b, 41c to the radial gap between the housing 10 and the outer peripheral portion 39. As a result, the internal leak of MCV9 can be suppressed, and the decrease in the flow rate of the cooling water can be suppressed.
The third sub-opening 41c is provided on the x-axis positive direction side of the first sub-opening 41a, and has a larger opening area than the first sub-opening 41a and the second sub-opening 41b. That is, since the third sub-opening 41a is the closest to the main opening 40 among the sub-openings 41a, 41b, 41c and has the largest opening area, it is the most among the sub-openings 41a, 41b, 41c. A lot of cooling water can flow. Therefore, the third sub-communication port 17c corresponding to the third sub-opening 41a is connected to the radiator 3, which requires the most cooling water among the heat exchangers 3, 4, 5 mounted on the vehicle. Suitable.
The first sub-opening 41a has a summer opening 41a1 and a winter opening 41a2. This makes it possible to control the flow rate of the cooling water according to the outside air temperature. The same effect is obtained for the third sub-opening 41c.
The bearing portion 18 has a radial thrust bearing 24 that rotatably supports the drive shaft 13, and the peripheral wall 15 is provided at the x-axis positive direction end and rotatably supports the x-axis positive direction end of the outer peripheral portion 39. It has a slide bearing 44. That is, since the radial bearings that receive the force from the radial direction (radial direction) are arranged at both ends of the rotor 12 in the x-axis direction, the rotor 12 can be stably supported and the rotation of the rotor 12 becomes smooth.

The housing 10 has a relief hole 28 that extends from the bearing portion 18 toward the upper side of the vehicle (on the negative direction side of the x-axis), connects to the outside of the housing 10, and is inclined with respect to the x-axis. As a result, the air flowing into the bearing portion 18 can be discharged to the outside of the housing 10. Further, since the relief hole 28 is inclined with respect to the x-axis, it is possible to suppress the lengthening of the dimension of the housing 10 in the x-axis direction.
The bearing portion 18 has a thrust bearing 27 that supports the drive shaft 13. The rotor 12 receives a force on the negative side of the x-axis from the cooling water introduced into the main opening 40. By supporting the rotor 12 with the thrust bearing 27, the force acting on the rotor 12 in the x-axis direction (thrust direction) can be supported.
The outer peripheral portion 39 has a tapered shape in which the inner diameter increases from the negative direction side of the x-axis to the positive direction side. As a result, the rotor 12 after insert molding can be easily removed from the resin molding die, so that the manufacturing process of the rotor 12 can be facilitated.
The outer peripheral portion 39 has a flange portion 39a at the positive end on the x-axis. As a result, it is possible to suppress leakage of cooling water to the gap between the inner peripheral surface of the peripheral wall 15 and the outer peripheral surface of the outer peripheral portion 39 in the radial direction at the x-axis positive direction end of the outer peripheral portion 39. Therefore, the internal leak of MCV9 can be suppressed, and the decrease in the flow rate of the cooling water can be suppressed.
The cooling system 1 of the first embodiment circulates cooling water cooled by each heat exchanger 3,4,5 via a plurality of heat exchangers 3,4,5 and each heat exchanger 3,4,5. It has a circuit 7 for cooling the engine 2 by allowing the engine 2, and an MCV 9 for controlling the flow rate of the cooling water circulating in the circuit 7. As a result, the cooling system 1 can be miniaturized and the pressure loss can be reduced.
The MCV9 controls the flow rate of cooling water from the engine 2 to the heat exchangers 3, 4 and 5, the main communication port 16 is connected to the engine 2 side, and the sub communication ports 17a, 17b and 17c are heat exchanges. Connect to the 3, 4, 5 side of the vessel. As a result, the pressure loss of the cooling water from the engine 2 to the heat exchangers 3, 4, 5 can be suppressed.

[Embodiment 2]
FIG. 11 is a cross-sectional view taken along the line S5-S5 of FIG. 4 in the second embodiment.
The MCV90 of the second embodiment is different from the first embodiment in the shape of the second guide portion 42c. In the second embodiment, there is one first sub-opening 41a and one third sub-opening 41c. Further, in the second embodiment, the bearing portion 18 and the cylindrical portion 42b do not overlap in the x-axis direction. The second guide portion 42c of the second embodiment is a first guide portion 42c2 corresponding to the second sub-opening portion connected to the opening peripheral edge on the negative side of the x-axis of the second sub-opening portion 41b shown in FIG. The second guide portion 42c1 corresponding to the first sub-opening that connects to the opening peripheral edge on the negative x-axis side of the sub-opening 41a, and the third sub that connects to the opening peripheral edge on the negative x-axis side of the third sub-opening 41c. It has a second guide portion 42c3 corresponding to the opening. The second guide portion 42c1 corresponding to the first sub-opening connects the cylindrical portion 42b and the outer peripheral portion 39. The second guide portion 42c1 corresponding to the first sub-opening has a tapered shape in which the outer diameter in the radial direction increases from the positive direction side to the negative direction side of the x-axis. The second guide portion 42c3 corresponding to the third sub-opening connects the tip portion 42a and the outer peripheral portion 39. The second guide portion 42c3 corresponding to the third sub-opening has a tapered shape in which the outer diameter in the radial direction increases from the positive direction side of the x-axis to the negative direction side. Since other configurations are the same as those in the first embodiment, the description thereof will be omitted.
The MCV90 of the second embodiment has a second guide portion 42c1 corresponding to the first sub-opening portion connected to the opening peripheral edge on the negative side of the x-axis of the first sub-opening portion 41a. As a result, a flow of cooling water from the main opening 40 to the first sub-opening 41a is formed along the shape of the second guide portion 42c1 corresponding to the first sub-opening, and the main opening 40 to the first sub-opening is formed. Since the cooling water flows smoothly with 41a, the pressure loss can be further reduced. The same effect can be obtained for the second guide portion 42c3 corresponding to the third sub-opening.

[Embodiment 3]
FIG. 12 is a cross-sectional view taken along the line S5-S5 of FIG. 4 in the third embodiment.
The MCV 91 of the third embodiment is different from the second embodiment in the shape of the outlets 20a, 20b, 20c connected to the respective sub-communication ports 17a, 17b, 17c. The inner diameter of each sub-communication port 17a, 17b, 17c side (diameter inner side) end of each outlet 20a, 20b, 20c has a tapered shape in which the opening area gradually increases from the radial inner side to the outer side. Similarly, each of the sub-communication ports 17a, 17b, and 17c has a tapered shape in which the opening area gradually increases from the inside to the outside in the radial direction. Since other configurations are the same as those of the second embodiment, the description thereof will be omitted.
In the MCV91 of the third embodiment, since the sub-communication ports 17a, 17b, 17c are connected to the outlets 20a, 20b, 20c whose opening area increases from the inside to the outside in the radial direction, the pressure loss of the cooling water is further reduced. can.

[Embodiment 4]
FIG. 13 is a schematic view of the cooling system 100 of the fourth embodiment.
In the cooling system 100 of the fourth embodiment, the MCV 9 adjusts the flow rate of the cooling water supplied from the heat exchangers 3, 4, 5 to the water pump 6. The main communication port 16 of the MCV9 connects the valve body accommodating portion 19 and the water channel leading to the water pump 6. The first outlet 20a connects the water channel from the heater 5 and the first sub-communication port 17a. The second outlet 20b connects the water channel from the transmission oil warmer 4 to the second sub-communication port 17b. The third outlet 20c connects the water channel from the radiator 3 to the third sub-communication port 17c. Since other configurations are the same as those in the first embodiment, the description thereof will be omitted.
In the cooling system 100 of the fourth embodiment, the MCV 9 controls the flow rate of the cooling water from the heat exchangers 3, 4, 5 to the engine 2 (the suction side of the water pump 6), and the main communication port 16 is the engine 2 side. Connect, and each sub-communication port 17a, 17b, 17c is connected to each heat exchanger 3,4,5 side. As a result, the pressure loss of the cooling water from the heat exchangers 3, 4, 5 to the engine 2 can be suppressed.

[Other embodiments]
Although the embodiments for carrying out the present invention have been described above, the specific configuration of the present invention is not limited to the configurations of the embodiments, and there are design changes and the like within a range that does not deviate from the gist of the invention. Is also included in the present invention.
The heat source of the cooling system may be an internal combustion engine other than the engine, a fuel cell, or the like.
The radial thrust bearing of the bearing portion may be a radial bearing.
The number of sub-communication openings and sub-openings may be two or four or more, respectively.

The technical ideas that can be grasped from the embodiments described above are described below.
In one embodiment thereof, the flow control valve extends from the outer periphery of the base portion to one side in the axial direction when the drive shaft, the base portion through which the drive shaft penetrates, and the direction along the axis of the drive shaft are the axial directions. A peripheral wall provided with a valve body accommodating portion on the inner peripheral side, a main communication port provided at one end of the peripheral wall on one side in the axial direction and communicating with the valve body accommodating portion, and the valve body formed on the peripheral wall. A housing having a plurality of sub-communication ports communicating with the accommodating portion, a bearing portion projecting from the base portion toward one side in the axial direction and rotatably supporting the drive shaft, and the axial direction of the base portion. A drive mechanism provided on the other side to rotate and drive the drive shaft, a valve body housed in the valve body accommodating portion, a bottom portion, and an outer peripheral portion extending from the outer periphery of the bottom portion to one side in the axial direction. A main opening provided at one end of the outer peripheral portion on one side in the axial direction and communicating with the main communication port, and the plurality of subs when the valve body formed on the outer peripheral portion is within a predetermined rotation angle range. A plurality of sub-openings that communicate with the corresponding sub-communication ports among the communication ports, and an extension portion that extends from the bottom portion or the outer peripheral portion to one side in the axial direction and is fixed to one end portion of the drive shaft. A valve provided on the outer peripheral side of the extending portion and having a first guide portion whose outer shape in the radial direction increases from one side in the axial direction to the other side when the radial direction of the axis is the radial direction. Prepare with the body.
In a more preferred embodiment, in the above aspect, the extending portion has a cylindrical portion extending from the first guide portion to the other side in the axial direction.
In another preferred embodiment, in any of the above embodiments, the extending portion connects the cylindrical portion to the outer periphery of the bottom portion or the outer peripheral portion, and has a radial outer shape from one side in the axial direction to the other side in the axial direction. Has a second guide portion that increases the size.

In yet another preferred embodiment, in any of the above embodiments, the valve body has a connecting portion that extends in the axial direction and connects the bottom portion and the second guide portion.
In yet another preferred embodiment, in any of the above embodiments, at least one of the plurality of sub-openings overlaps the first guide portion in the axial direction.
In yet another preferred embodiment, in any of the above embodiments, a radial gap between the housing and the outer peripheral portion from one of the two corresponding sub-communication openings and the plurality of sub-openings. It has a sealing part that suppresses fluid leakage to.
In yet another preferred embodiment, in any of the above embodiments, the plurality of sub-communication ports are provided on the other side in the axial direction from the first sub-communication port and the first sub-communication port. The plurality of sub-openings correspond to the first sub-communication port and correspond to the first sub-opening and the second sub-communication port that overlap the first guide portion in the axial direction. It has two sub-openings.
In yet another preferred embodiment, in any of the above embodiments, the valve body is connected to the opening peripheral edge of the second sub-opening portion on the other side in the axial direction, and has a diameter from one side in the axial direction toward the other side. It has a second guide portion that increases the outer shape in the direction.
In yet another preferred embodiment, in any of the above embodiments, the plurality of sub-communication ports have a third sub-communication port provided on one side in the axial direction with respect to the first sub-communication port, and the plurality of sub-communication ports are provided. The sub-opening has a third sub-opening that corresponds to the third sub-communication port and has a larger opening area than the first sub-opening.

In yet another preferred embodiment, in any one of the above embodiments, at least one of the first sub-communication port and the second sub-communication port is set to a plurality.
In yet another preferred embodiment, in any of the above embodiments, the bearing portion has a first radial bearing that rotatably supports the drive shaft, and the peripheral wall is provided at one end in the axial direction. It has a second radial bearing that rotatably supports one end of the outer peripheral portion on one side in the axial direction.
In yet another preferred embodiment, in any of the above embodiments, the housing has a relief hole that connects the bearing portion to the outside of the housing and is inclined with respect to the axis.
In yet another preferred embodiment, in any of the above embodiments, the bearing portion has a thrust bearing that supports the drive shaft.
In yet another preferred embodiment, in any of the above embodiments, at least one of the plurality of sub-communication ports is connected to a pipe whose opening area increases from the inside to the outside in the radial direction.
In yet another preferred embodiment, in any of the above embodiments, the outer peripheral portion has an inner diameter that increases from the other end side in the axial direction toward one side.
In yet another preferred embodiment, in any of the above embodiments, the outer peripheral portion has a flange portion at one end thereof in the axial direction.

From another point of view, the flow control valve includes a drive shaft, a valve body accommodating portion provided on one side of the drive shaft in the axial direction when the direction along the axis of the drive shaft is the axial direction, and the valve body accommodating portion. A main communication port provided on one side of the valve body accommodating portion in the axial direction and communicating with the valve body accommodating portion, and a plurality of communicating ports communicating with the valve body accommodating portion from the radial direction when the radial direction of the axis is the radial direction. A housing having a sub-communication port, a drive mechanism provided on the other side of the drive shaft in the axial direction and rotationally driving the drive shaft, and a bottom portion and an outer periphery of the bottom portion accommodated in the valve body accommodating portion. Provided at the outer peripheral portion extending from the outer peripheral portion to one side in the axial direction, the shaft support portion provided on one side in the axial direction from the bottom portion and receiving the rotational force of the drive shaft, and the end portion of the outer peripheral portion on one side in the axial direction. The main opening that communicates with the main communication port, and the plurality of sub communication ports that are formed in the outer peripheral portion and have the valve body within a predetermined rotation angle range when the radial direction of the axis is the radial direction. A plurality of sub-openings that overlap with the corresponding sub-communication port in the radial direction and extend from the outer periphery of the bottom portion or the outer peripheral portion to one side in the axial direction and inward in the radial direction to connect to the shaft support portion. A guide portion and a valve body having the guide portion are provided.

Further, from another viewpoint, the cooling system provides a heat source by circulating the fluid cooled by the heat exchanger via the plurality of heat exchangers for cooling the inflowing fluid and the plurality of heat exchangers. It has a circuit for cooling and a flow control valve for controlling the flow rate of the fluid circulating in the circuit, and the flow control valve has a drive shaft, a base through which the drive shaft penetrates, and a drive shaft. When the direction along the axis is the axial direction, it extends from the outer periphery of the base portion to one side in the axial direction and is provided at the peripheral wall provided with the valve body accommodating portion on the inner peripheral side and at the end portion of the peripheral wall on one side in the axial direction. A main communication port that communicates with the valve body accommodating portion, a plurality of sub-communication ports that are formed on the peripheral wall and communicate with the valve body accommodating portion, and a drive that is projected from the base portion toward one side in the axial direction. A housing having a bearing portion that rotatably supports the shaft, a drive mechanism provided on the other side of the base portion in the axial direction to rotationally drive the drive shaft, and a bottom portion accommodated in the valve body accommodating portion. An outer peripheral portion extending from the outer periphery of the bottom portion to one side in the axial direction, a main opening provided at the end portion of the outer peripheral portion on one side in the axial direction and communicating with the main communication port, and the outer peripheral portion formed in the outer peripheral portion. When the valve body is in a predetermined rotation angle range, a plurality of sub-openings communicating with the corresponding sub-communication port among the plurality of sub-communication ports, and the bottom portion or the outer peripheral portion extending from the bottom portion or the outer peripheral portion to one side in the axial direction. The extension portion fixed to one end of the drive shaft and the extension portion provided on the outer peripheral side of the extension portion, and when the radial direction of the axis is the radial direction, the said from one side in the axial direction to the other side. A valve body having a first guide portion having a large radial outer shape is provided.
Preferably, in the above embodiment, the flow control valve controls the flow rate of the fluid from the heat source to the plurality of heat exchangers, the main communication port is connected to the heat source side, and the plurality of sub communication ports are connected. Is connected to the plurality of heat exchangers.
In another preferred embodiment, in any of the above embodiments, the flow control valve controls the flow rate of the fluid from the plurality of heat exchangers to the heat source, and the main communication port is connected to the heat source side. The plurality of sub-communication ports are connected to the plurality of heat exchanger sides.

1 Cooling system
2 Engine (heat source)
3 Radiator (heat exchanger)
4 Transmission oil warmer (heat exchanger)
5 Heater (heat exchanger)
7 circuit
9 Mechanical control valve (flow control valve)
10 housing
11 Drive mechanism
12 Rotor (valve body)
13 Drive shaft
14 base
15 perimeter wall
16 Main communication port
17 Deputy communication port
17a 1st sub-communication port
17b 2nd sub-communication port
17c 3rd sub-communication port
18 Bearing
19 Valve housing
20a 1st outlet (piping)
20b 2nd outlet (piping)
20c 3rd outlet (piping)
24 Radial thrust bearing (1st radial bearing)
27 Thrust bearing
28 relief hole
38 bottom
38a Connection
38b Connection
39 Outer circumference
39a Flange
40 Main opening (1st communication port)
41 Sub-opening (second communication port)
41a 1st sub-opening
41b 2nd secondary opening
41c 3rd sub-opening
42 Extension
42b Cylindrical part (cylindrical part)
42c 2nd guide section
43 1st guide section
44 Plain bearing (second radial bearing)
45 First seal part (seal part)
46 Second seal part (seal part)
47 Third seal part (seal part)
100 cooling system

Claims (9)

A valve body with a bottom and
A valve body accommodating portion for accommodating the valve body inside, a first communication port facing the bottom portion and communicating the valve body accommodating portion and the outside, and a surface different from the first communication port are provided. A housing having a second communication port for communicating the valve body accommodating portion and the outside,
A valve device that changes the communication state between the first communication port and the second communication port by rotating the valve body.
An inclined portion provided on the surface of the bottom portion facing the first communication port and inclined so that the diameter increases in a direction away from the first communication port from the center of the bottom portion toward the outer peripheral side.
A regulating portion provided in a concave portion formed on a surface of the bottom portion opposite to the first communication port and having a surface extending in the axial direction of the valve body .
A stopper provided on the housing so as to face the bottom portion and regulate the rotation range of the restricting portion,
Valve device with. The valve device according to claim 1.
The concave portion has a shallower depth from the radial center of the bottom toward the outside in the radial direction.
Valve device. A valve body in which one end is closed by the bottom, the other end is opened to form a bottomed cylinder extending in the axial direction, and an opening through which fluid flows out is formed in the outer peripheral portion thereof.
With a valve body accommodating portion in which the valve body is rotatably stored around the axis of the valve body, and a housing body having a communication port that opens in the valve body accommodating portion and is connected to an external heat exchanger. ,
A regulating portion provided in a concave portion formed on a surface of the bottom portion opposite to the communication port and having a surface extending toward the other end side in the axial direction of the valve body.
A stopper provided on the end face wall of the valve body accommodating portion facing the bottom portion and restricting the rotation range of the restricting portion,
Valve device with. The valve device according to claim 3.
The restricting portion is formed between the bottom surface of the concave portion and the surface formed on one end side in the axial direction of the bottom surface of the concave portion among the surfaces of the bottom portion opposite to the communication port. The connection part,
Valve device. The valve device according to claim 4.
The surface formed on one end side in the axial direction from the bottom surface of the concave portion of the bottom portion is a flat flat region portion orthogonal to the axial direction of the valve body.
The bottom surface of the concave portion of the bottom portion is an inclined region portion inclined toward the axis side of the valve body toward the other end side of the valve body.
Valve device. The valve device according to claim 5.
Two connecting portions are formed between the flat region portion and the inclined region portion, and the stopper is formed in the rotation range of the inclined region portion.
Valve device. The valve device according to claim 6.
The stopper is integrally formed with the end face wall.
Valve device. A fluid pump that pressurizes and pumps a fluid that serves as a heat medium for cooling a heat source, a valve device that sends the fluid from the fluid pump to a plurality of heat exchangers, or a fluid from the plurality of heat exchangers. An automotive heat medium system with a valve device that feeds to a pump.
A heat medium system for automobiles using the valve device according to any one of claims 1 to 7 as the valve device. The automobile heat medium system according to claim 8.
The heat source is an internal combustion engine, and the heat exchanger is at least a radiator, a heater, and an oil cooler.
The valve device selectively distributes the cooling water of the internal combustion engine to the radiator, the heating device, and the oil cooler.
Automotive heat medium system.

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