JP2019108946A - Fluid control valve - Google Patents

Abstract

To provide a fluid control valve capable of reducing a pressure loss of fluid in a flow passage in a housing.SOLUTION: A fluid control valve 1 includes: a cylindrical housing 10 in which one end is closed; an opening 21 provided at a part of an outer periphery of the housing 10; an inflow part 20 provided extending in a tangential direction of the outer periphery of the housing 10, and communicating with an internal space 14 of the housing 10 via the opening 21; an outflow part 30 provided coaxially with a shaft core X at the other end side in a direction along the shaft core X of the housing 10, and having an outflow port 31 at a boundary with the housing 10; and a rotary body 40 accommodated in the housing 10, and supported rotatably around the shaft core X with respect to the housing 10. The rotary body 40 includes a closing part 41 capable of switching the opening 21 between an opened state and a closed state by rotation, and in the opened state, fluid which has flowed in the internal space from the inflow part 20 becomes swirl flow along an inner peripheral surface 15 of the housing 10 and flows out to the outflow part 30 from the outflow port 31.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a fluid control valve that controls fluid flow.

  Traditionally, fluid control valves have been used to control fluid flow. There is a thing of patent document 1 as an example of such a fluid control valve.

  Patent Document 1 describes a fluid control valve for a fluid circulation circuit including a body provided with a fluid inlet and at least two fluid outlets. The control valve rotates an annular seal ring made of a low coefficient of friction material to distribute fluid through the fluid outlet.

Japanese Patent Publication No. 2004-534191

  In the fluid control valve described in Patent Document 1, an adjusting member having an inclined surface at about 45 degrees with respect to the rotation axis is provided as a valve body, and the fluid introduced from the fluid inlet collides with the inclined surface. The outflow direction is changed to a right angle. Therefore, in the fluid control valve described in Patent Document 1, the pressure loss of the fluid is large. In addition, since the flow path becomes narrow as the adjustment member occupies half or more in the internal space of the housing, the pressure loss of the fluid also increases from this point.

  In view of the above situation, there is a need for a fluid control valve that can reduce pressure loss of fluid in a flow passage in a housing.

  The characteristic configuration of the fluid control valve according to the present invention is provided by extending in a tangential direction of the outer circumference of the housing, a cylindrical housing closed at one end side, an opening provided in a part of the outer circumference of the housing, It is provided coaxially with the axial core at the other end side in the direction along the axial center of the housing, and has an outlet at the boundary with the housing. And a rotating body housed in the housing and supported rotatably around the axis with respect to the housing, the rotating body opening and closing the opening by rotation. And in the open state, the fluid flowing into the internal space from the inflow portion becomes a swirling flow along the inner circumferential surface of the housing, and from the outflow port to the outflow portion leak Located in.

  According to such a characteristic configuration, the fluid flows from the tangential direction of the outer periphery of the housing in the fluid control valve, changes its flow direction in the perpendicular direction while flowing, and flows out from the outlet, so the fluid described in Patent Document 1 The pressure loss can be reduced as compared with a configuration in which the fluid collides with the rotary body serving as the valve body to change the flow direction in the perpendicular direction as in the control valve. In addition, since the fluid flows in a swirling flow in the housing, the fluid flowing into the internal space of the housing from the inlet does not instantly have a low pressure, and the pressure loss of the fluid can be reduced. Further, if the fluid is a swirling flow, the pressure loss of the fluid can be reduced even if the flow path is contracted when the fluid flows out from the outlet to the outlet.

  Another characteristic configuration is that the pivoting body has an anti-joining wall that prevents the fluid having swirled on the inner circumferential surface of the housing from joining the fluid immediately after flowing in from the opening in the open state.

  With such a configuration, the merging prevention wall prevents merging of the fluid immediately after flowing through the inlet into the housing through the opening and the fluid that swirls in the internal space of the housing. As a result, the fluid is maintained in a smooth swirl in the internal space of the housing, and the failure of disturbing the fluid flow near the opening can be prevented. As a result, the pressure loss of the fluid can be reduced more effectively in the fluid control valve.

  Another characteristic configuration is that the rotating body has a curved wall that guides the fluid, which has swirled the inner peripheral surface of the housing in the open state, to approach the axial center.

  With such a configuration, the fluid flow in the inner space of the housing is a smooth swirling flow toward the outlet. This can more effectively reduce the pressure loss of the fluid at the fluid control valve.

  Another feature is that the inflow portion is provided to be inclined to a side away from the outflow portion with respect to a plane perpendicular to the axial direction of the housing.

  With such a configuration, the swirl flow of the fluid leading to the outlet can be smoother, and thus the pressure loss of the fluid in the flow passage in the housing can be further reduced.

It is a perspective view showing the internal structure of the fluid control valve concerning a 1st embodiment. It is a sectional side view of a fluid control valve concerning a 1st embodiment. It is a plane sectional view of a fluid control valve concerning a 1st embodiment. It is a perspective view of the rotation body used in 2nd Embodiment. It is a plane sectional view of a fluid control valve concerning a 2nd embodiment. It is a plane sectional view when a part of opening of a fluid control valve concerning a 2nd embodiment is an opened state. It is a sectional side view of the fluid control valve concerning a 3rd embodiment. It is a plane sectional view of a fluid control valve concerning another embodiment. It is a figure which shows the closing part of the rotation body which concerns on another embodiment.

  Hereinafter, embodiments of the present invention will be described based on the drawings.

First Embodiment
The fluid control valve according to the present invention is used, for example, in a cooling circuit that circulates a fluid (for example, cooling water) for cooling an engine of a vehicle. As shown in FIGS. 1 to 3, the fluid control valve 1 includes a housing 10, an inflow portion 20, an outflow portion 30, a rotating body 40, and a rotation mechanism 50. The housing 10 is configured in a cylindrical shape. The top surface portion 11 is provided on one end side of the cylindrical housing 10 in the direction of the axis X and is closed. A rotation mechanism 50 is attached to the outside of the top surface portion 11. An outflow portion 30 is attached to the other end of the housing 10 in the direction of the axis X. The housing 10 can be configured using metal or resin.

  A tapered portion 12 is provided on the other end side of the housing 10, and a cylindrical outflow portion 30 is extended at the tip of the tapered portion 12. The outflow portion 30 is provided coaxially with the axial center X at the other end side in the direction along the axial center X of the housing 10 and has an outflow port 31 at the boundary with the tapered portion 12.

  An opening is provided as a part of the peripheral wall 13 (an example of the outer periphery) of the housing 10 as an inlet 21. The inflow portion 20 is provided on the peripheral wall 13 of the housing 10. The circumferential wall 13 is parallel to the axial center X of the cylindrical housing 10. The inflow portion 20 is provided extending in the tangential direction of the outer periphery of the housing 10 from the inflow port 21 (an example of the opening), and communicates with the internal space 14 of the housing 10 via the inflow port 21 (opening).

  The rotating body 40 is accommodated coaxially with the housing 10 in the internal space 14 of the housing 10. The pivoting body 40 is pivotably supported around the axis X with respect to the housing 10. The pivoting body 40 has an arc-shaped closing portion 41 and a top plate portion 42. The closing portion 41 is shaped along the inner circumferential surface 15 of the circumferential wall 13 of the housing 10. The top plate portion 42 has a shape along the top surface portion 11 of the housing 10. The rotating body 40 is formed of, for example, a plate-like resin of a grade (sliding grade) having excellent slidability such as polytetrafluoroethylene (PTFE), and the axial center of the rotating body 40 is used as the axial center X of the housing 10. A flow passage space is formed on the inner peripheral side of the rotating body 40 in the internal space 14 of the housing 10 in agreement.

  The rotating mechanism 50 rotates the rotating body 40 along the inner circumferential surface 15 of the peripheral wall 13 of the housing 10 with the axis X of the rotating body 40 as the rotation center. As shown in FIGS. 1 and 2, in the present embodiment, the rotation mechanism 50 is configured to include a motor 51 as a rotation driver. The rotating body 40 is supported by the rotating shaft 52 of the motor 51. In the present embodiment, the rotating shaft 52 supports the top plate portion 42 of the rotating body 40. Further, the rotating body 40 rotates while the closing portion 41 slides on the inner circumferential surface 15 of the peripheral wall 13 of the housing 10 by the rotation mechanism 50.

  The closing portion 41 is configured to be able to switch the inflow port 21 between the open state and the closed state by the rotation of the rotating body 40. FIG. 3 shows an open state by a solid line and a closed state by a two-dot chain line. When the inlet 21 is open, the fluid flowing from the inlet 20 into the internal space 14 of the housing 10 forms a swirling flow along the inner circumferential surface 15 of the housing 10 and flows out from the outlet 31 to the outlet 30.

  As described above, in the fluid control valve 1, the fluid flows from the tangential direction of the outer periphery of the housing 10 and changes its flow direction in the perpendicular direction while flowing around and flows out from the outlet 31, so the fluid control described in Patent Document 1 The pressure loss can be reduced as compared with a configuration in which the fluid collides with the rotary body serving as the valve body and changes the flow direction in the perpendicular direction. In addition, since the fluid flows in the housing 10 along the swirling flow, the fluid flowing into the internal space 14 of the housing 10 from the inlet 21 does not instantly have a low pressure, and the pressure loss of the fluid can be reduced. In addition, if the fluid is a swirling flow, the pressure loss of the fluid can be reduced even when the fluid flows out from the outlet 31 to the outlet 30 and the flow path is reduced.

Second Embodiment
A second embodiment of the fluid control valve 1 will be described. In the first embodiment, an example in which the rotating body 40 includes the arc-shaped closing portion 41 and the top plate portion 42 has been shown. In the second embodiment, as shown in FIG. 4, in addition to the closing portion 41 and the top plate portion 42, the pivoting body 40 includes a merging prevention wall 43 and a first curved wall 44.

  5 shows an open state in which the closing portion 41 of the rotating body 40 opens the inflow port 21 as a solid line, and shows a closed state in which the closing portion 41 closes the inflow port 21 as a two-dot chain line. The anti-joining wall 43 is provided to prevent the fluid swirling on the inner circumferential surface 15 of the housing 10 from joining with the fluid immediately upstream from the inlet 21 immediately after the inlet 21 is opened when the inlet 21 is open. It is done. The junction preventing wall 43 is extended at the end of the closing portion 41, and is configured to be along the flow channel direction of the inflow portion 20 when the closing portion 41 moves to a position where the inflow port 21 is opened. . In the present embodiment, the second curved wall 46 is connected to the merging prevention wall 43. The second curved wall 46 is formed in an arc shape with the axis X as a center. The first curved wall 44 is provided on the inner peripheral side of the closing portion 41. The first curved wall 44 is formed with a curvature larger than the curvature of the closing portion 41, one end is connected to the anti-merge wall 43, and the other end is connected to the end 41 a of the closing portion 41. A reinforcing rib 48 is provided between the closing portion 41 and the first curved wall 44.

  In the rotating body 40 of the present embodiment, the space between the end 45 of the first curved wall 44 and the end 47 of the second curved wall 46 is open. In the present embodiment, when the inflow port 21 is in the open state, the fluid flowing into the housing 10 from the inflow port 21 by the inner circumferential surface 15 and the junction preventing wall 43 and the second curved wall 46 is the internal space 14 of the housing 10. The first curved wall 44 guides the swirled fluid to approach the axial center X. The fluid control valve 1 may be configured without providing at least one of the first curved wall 44 and the second curved wall 46 on the rotating body 40.

  The merging prevention wall 43 prevents merging of the fluid immediately after flowing into the internal space 14 of the housing 10 from the inflow port 21 and the downstream fluid already swirling in the internal space 14 of the housing 10. As a result, the fluid is maintained in a smooth swirl in the internal space 14 of the housing 10, and the problem of disturbed fluid flow near the inlet 21 can be prevented. As a result, fluid pressure loss in the fluid control valve 1 can be reduced more effectively.

  In addition, since the rotating body 40 has the first curved wall 44, the fluid is guided by the first curved wall 44 in the internal space 14 of the housing 10 and becomes a smooth swirling flow toward the outlet 31. Thereby, the pressure loss of the fluid in the fluid control valve 1 can be reduced more effectively.

  FIG. 6 shows a state where the closing portion 41 of the rotating body 40 does not completely close the inlet 21 and a part of the inlet 21 is opened. As shown in FIG. 6, in the state where the inlet 21 is not fully opened, although the amount of fluid flowing in from the inlet 21 is limited, the anti-merge wall 43, the first curved wall 44, and the second curved wall 46 , Functions in the same manner as the open state of FIG.

Third Embodiment
In the present embodiment, as shown in FIG. 7, the inflow portion 20 is provided to be inclined to the side away from the outflow portion 30 with respect to a plane perpendicular to the axial direction of the housing 10. The other configuration is the same as the fluid control valve 1 of the first embodiment. In the fluid control valve 1 of the second embodiment, the inflow portion 20 may be inclined as in the present embodiment.

  By configuring the inflow portion 20 in this manner, the fluid tends to flow in the direction toward the outflow port 31, so the swirl flow of the fluid from the inflow port 21 to the outflow port 31 becomes smoother, and the inside of the housing 10 The pressure loss of fluid in the space 14 can be further reduced.

Other Embodiments
In the above embodiment, the closing portion 41 of the rotating body 40 is described as sliding along the inner peripheral surface 15 of the peripheral wall 13 of the housing 10. However, it is also possible to provide a sealing member 60 between the closure 41 and the housing 10, as shown for example in FIG. The sealing member 60 is provided on the inner circumferential surface 15 of the housing 10 near the inlet 21 with which the closing portion 41 contacts when the rotating body 40 is in the open state and the closed state. Specifically, it is attached to a recess formed in the inner circumferential surface 15. As a result, when the inlet 21 is closed, the inner circumferential surface 15 of the housing 10 and the closing portion 41 of the rotating body 40 are in fluid tight contact via the seal member 60, and a more reliable valve closing state To achieve. The seal member 60 is also applicable in the first embodiment.

  In the second embodiment, the rotating body 40 of the fluid control valve 1 is configured to include both the merging prevention wall 43 and the first curved wall 44. However, the rotating body 40 includes the merging prevention wall 43 and the first curved wall 44. Only one of them may be provided.

  Since the end 41 a of the pivoting body 40 faces the flow of fluid in the internal space 14 of the housing 10, the end 41 a may obstruct the flow of fluid. Therefore, as shown in FIG. 9, the closing portion 41 may be configured to decrease in thickness toward the end 41a. Thereby, the flow of fluid can be made smoother in the interior space 14 of the housing 10. Although FIG. 9 shows an example in which the thickness of the end 41 a of the closing part 41 is smaller than the thickness of the other parts, the thickness of the closing part 41 gradually decreases from the middle part in the circumferential direction toward the end 41 a It may be configured.

  The present invention can be used for a control valve that controls fluid flow.

DESCRIPTION OF SYMBOLS 1: Fluid control valve 10: Housing 11: Top surface part 13: Peripheral wall 14: Internal space 15: Inner peripheral surface 20: Inflow part 21: Inflow part 30: Outflow part 31: Outlet part 40: Rotating body 41: Closure part 43: Joint preventing wall 44: first curved wall 46: second curved wall X: axis

Claims (4)

A cylindrical housing closed at one end,
An opening provided at a part of the outer periphery of the housing;
An inflow portion provided in a tangential direction of the outer periphery of the housing, the inflow portion communicating with the internal space of the housing through the opening;
An outlet portion coaxial with the shaft core at the other end side in a direction along the shaft core of the housing, and having an outlet at the boundary with the housing;
And a rotating body accommodated in the housing and supported rotatably around the axis with respect to the housing,
The pivoting body has a closing portion capable of switching the opening between an open state and a closed state by pivoting.
In the open state, fluid flowing into the internal space from the inflow portion forms a swirling flow along the inner peripheral surface of the housing, and flows out from the outflow port to the outflow portion.   2. The fluid control valve according to claim 1, wherein the rotating body has an anti-joining wall that prevents the fluid having swirled on the inner circumferential surface of the housing from joining the fluid immediately after flowing in from the opening in the open state.   The fluid control valve according to claim 2, wherein the rotating body has a curved wall which guides the fluid, which has swirled the inner peripheral surface of the housing in the open state, to approach the axis.   The fluid control valve according to any one of claims 1 to 3, wherein the inflow portion is provided to be inclined to a side away from the outflow portion with respect to a plane perpendicular to the axial direction of the housing.

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