JP2017015215A - Flow rate adjustment structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow rate adjustment structure enabling rational flow rate adjustment.SOLUTION: A flow rate adjustment structure includes: a flow passage member 10 having a flow passage in which fluid circulates; a projection 19 provided on the inner peripheral surface of the flow passage, and defining a flow passage area; and a flow rate adjustment body 30 arranged overlappingly to the projection 19 in a circulation direction of fluid, and having a hole 31 along the circulation direction. The cross sectional shape of a flow passage 17 at the position of the projection 19 and the cross sectional shape of the hole 31 of the flow rate adjustment body 30 are different from each other. The flow rate adjustment body 30 is fixed to a predetermined rotation phase along the circumferential direction of the flow passage 17, and thereby an overlapped state of the flow passage 17 and the hole 31 in the circulation direction of fluid is changed to determine the flow passage area.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a flow rate adjusting structure provided in a flow path formed in a flow path member.

  Patent Document 1 includes a fixed core and a valve accommodating member, and an electromagnetic valve that switches a fluid flow path formed in the valve accommodating member by reciprocating a ball valve together with a plunger by electromagnetic force generated in the energized fixed core. The configuration is disclosed. This electromagnetic valve is a three-way valve, and two valve seat members are provided with a ball valve interposed therebetween. The fluid introduced into the valve housing member is supplied to the control port or returned to the drain port through the hole of the valve seat member on the fluid outflow side. The flow rate of the fluid supplied to the control port varies depending on the flow path area of the hole of the valve seat member on the inflow side. On the other hand, the flow rate of the fluid returned to the drain port varies depending on the flow path area of the hole of the valve seat member on the outflow side.

JP 2002-317882 A

In the solenoid valve of Patent Document 1, generally, a hole portion having an appropriate flow path area is formed in the valve seat member in accordance with the flow path diameters of the control port and the drain port. That is, the flow rate is set by arranging a member having an appropriate flow path area in the flow path on the supply side in accordance with the supply target of the fluid. Usually, the flow path area required for the fluid supply target varies depending on the use environment, application, and the like. For this reason, in order to set an appropriate flow path area for the flow path on the supply side, for example, a plurality of members having different hole areas are prepared, and members are selected from the members and incorporated into the flow path member.
However, since there are a plurality of members for setting an appropriate flow path area, the processing cost of the members increases and the management of the members becomes complicated.

  In view of the above circumstances, a flow rate adjustment structure capable of rational flow rate adjustment is desired.

  The flow rate adjusting structure according to the present invention is characterized by a flow path member having a flow path for circulating a fluid, a convex portion provided on an inner peripheral surface of the flow path to define a flow channel area, and the convex section. And a flow rate adjusting body arranged in the fluid flow direction and having a hole along the fluid flow direction, and a cross-sectional shape of the flow path at the position of the convex portion and the flow rate control body The cross-sectional shape of the hole is irregular, and by fixing the flow rate adjusting body to a predetermined rotational phase along the circumferential direction of the flow path, the flow path and the hole in the flow direction of the fluid The point is that the channel area is determined by changing the overlapping state.

  According to this configuration, the flow rate adjusting body is fixed to a predetermined rotation phase along the circumferential direction of the flow path with respect to the convex portion that is provided on the inner peripheral surface of the flow path and defines the flow path area. The flow path area is determined by changing the overlapping state with the hole of the flow control body. Thereby, even if it is a single flow control body, since a flow-path area can be increased / decreased by changing a rotation phase, the flow control corresponding to a different supply object is attained. As a result, the management of the flow rate regulator is simplified, and the processing cost of the flow rate regulator is reduced.

  Another feature of the present invention is that a ball valve is disposed in the flow path at the position of the convex portion, and the convex portion guides the movement of the ball valve.

  With this configuration, since the ball valve is guided by the convex portion and the ball valve moves smoothly in the flow path, the opening and closing operation of the ball valve is stabilized.

  In another aspect of the present invention, the flow path is provided with a valve seat of the ball valve, and the flow rate adjuster is disposed to face the valve seat with the ball valve interposed therebetween. It is in the point which regulates.

  With this configuration, the flow rate adjusting body can also be used as a member for restricting the movement of the ball valve in the opening direction, so that the number of parts constituting the flow rate adjusting structure can be reduced.

  Another feature of the present invention is that the flow rate adjusting body is caulked and fixed to the inner surface of the flow path member.

  In this configuration, since the flow rate adjusting body is fixed by caulking to the inner surface of the flow path member, the processing of the flow rate adjusting body is unnecessary, and other members such as screws for fixing the flow rate adjusting body to the flow path member are also included. It is unnecessary. Accordingly, the flow rate adjusting body can be easily fixed to the flow path member.

It is sectional drawing which shows the flow-path member provided with the flow volume adjustment structure. It is a disassembled perspective view of a flow control structure. It is sectional drawing orthogonal to a flow path in a flow path member. It is a figure which shows the communication area | region of the hole of the flow volume adjustment body of a 1st rotation phase, and a flow path. It is a figure which shows the communication area | region of the hole and flow path of the flow volume adjustment body of a 2nd rotation phase. It is a figure which shows the communication area | region of the hole and flow path of the flow volume adjustment body of a 3rd rotation phase. It is sectional drawing which shows the flow volume adjustment structure of another form.

[First Embodiment]
Embodiments of the present invention will be described below with reference to the drawings. The flow rate adjustment structure of this embodiment is an example applied to a solenoid valve.

  FIG. 1 is an axial sectional view of the electromagnetic valve 1. Although not shown, the electromagnetic valve 1 is an electromagnetic two-way valve (two fluid inlets and outlets) that switches a fluid flow path used for control of an automatic transmission of a vehicle, for example.

  As shown in FIG. 1, the electromagnetic valve 1 includes a fixed core 2 and a valve housing member (an example of a flow path member) 10. The fixed core 2 has a cylindrical portion 21, a flange portion 22, and a case portion 23, and is formed of a magnetic material. The bobbin 3 is a cylindrical resin material and is disposed inside the case portion 23. A yoke 6 made of a magnetic material is fixed inside the bobbin 3. A coil 5 is wound around the outer peripheral surface of the bobbin 3.

  The plunger 7 is a bottomed cylindrical magnetic body, and is inserted inside the cylindrical portion of the yoke 6 so as to be capable of reciprocating in the axial direction. A magnetic gap is formed between the end surface of the plunger 7 and the end surface of the cylindrical portion 21 of the fixed core 2. Thus, a magnetic circuit is formed by the fixed core 2, the plunger 7 and the yoke 6. The plunger 7 is urged toward the ball valve 11 by a spring 8 accommodated therein. The end of the plunger 7 is inserted into an insertion hole 33 of the flow rate adjusting body 30 described later and comes into contact with the ball valve 11. The ball valve 11 is urged toward the valve seat member 14 by the plunger 7.

  The valve housing member 10 is disposed to face the yoke 6 and is fixed by caulking the end portion of the case portion 23 in the radially inward direction. The valve housing member 10 has two fluid inlets / outlets, that is, a supply port 12 for supplying fluid and a control port 13 for supplying hydraulic pressure to a controlled object. The valve of the valve housing member 10 includes a ball valve 11 and a valve seat member 14 disposed on the supply port 12 side.

  The valve housing member 10 has a flow path 15 through which fluid flows along the longitudinal direction. The flow path 15 includes a first flow path 16 in which the valve seat member 14 is disposed, a second flow path 17 that is a storage space for the ball valve 11, and a third flow path 18 in which the flow rate adjusting body 30 is disposed. It is configured.

  The first flow path 16 and the third flow path 18 have a circular cross section perpendicular to the fluid flow direction (the direction of the axis X), and the second flow path 17 is formed by a convex portion 19 protruding radially inward. ing. The convex portion 19 is provided on the inner peripheral surface of the flow channel 15 and defines the flow channel area of the second flow channel 17. The convex portion 19 includes a step portion 19 a on the supply port 12 side and a step portion 19 b on the control port 13 side. The valve seat member 14 is in contact with the step portion 19a, and the flow rate adjusting body 30 is in contact with the step portion 19b.

  As shown in FIG. 3, the second flow path 17 at the position of the convex portion 19 has a circular central hole slightly larger in diameter than the ball valve 11 in a cross section perpendicular to the fluid flow direction (direction of the axis X). 17a, and a first hole 17b and a second hole 17c formed in an arc shape on the outer peripheral side of the central hole 17a. A total of four first hole portions 17b and second hole portions 17c are provided in the circumferential direction of the central hole 17a, and the two hole portions 17b and 17c are present at opposing positions with the shaft core X in between. The first hole 17b is longer in the circumferential direction than the second hole 17c and shorter in the radial direction. The opening area of the second hole 17c is larger than that of the first hole 17b.

  As shown in FIG. 1, the flow rate adjusting body 30 is disposed at a position facing the valve seat member 14 with the ball valve 11 interposed therebetween. The flow rate adjusting body 30 is formed in a disk shape, and two through-holes (an example of hole portions) 31 extending in the circumferential direction are formed at an intermediate position in the radial direction. The two through holes 31 are formed at positions that are symmetric with respect to the axis X. The flow rate adjusting body 30 has a protruding portion 32 that protrudes in the thickness direction on the radial center side, and a through hole 31 is provided on the outer peripheral side of the protruding portion 32. The flow rate adjusting body 30 is inserted in a state where the surface portion 34 that does not have the protruding portion 32 faces the ball valve 11, and is disposed so as to overlap the convex portion 19 in the fluid flow direction. An insertion hole 33 for the plunger 7 is formed in the central portion of the flow rate adjusting body 30.

  The flow rate adjusting body 30 is configured to be rotatable around the axis X when assembled to the valve housing member 10 and to be fixed at a predetermined rotational phase along the circumferential direction of the second flow path 17. Yes. In FIG. 4, the flow rate adjusting body 30 is held at a position where the through hole 31 is vertically symmetric with respect to the second flow path 17 with the axis X interposed therebetween. This position of the flow rate adjusting body 30 is set as the first rotation phase, and is set to 0 degrees as a reference angle of the rotation phase, for example. A communication region 20 is formed between the second flow channel 17 and the flow rate adjusting body 30 as a region where the second flow channel 17 and the through hole 31 overlap in the fluid flow direction. In the communication region 20 in the first rotation phase, the entire first hole portion 17 b overlaps the through hole 31. The rotation angle when the flow rate adjusting body 30 is rotated is confirmed by providing, for example, a circumferential scale on the valve housing member 10 and the flow rate adjusting body 30.

  The second rotational phase (FIG. 5) of the flow rate adjuster 30 is set to a position obtained by rotating the flow rate adjuster 30 clockwise by 40 degrees from the first rotational phase (FIG. 4). In the communication region 20 in the second rotational phase, a part of the first hole part 17 b and a part of the second hole part 17 c overlap the through hole 31. Thereby, the area of the communication region 20 is larger in the second rotational phase than in the first rotational phase (FIG. 4).

  The third rotational phase (FIG. 6) of the flow rate adjusting body 30 is a position where the flow rate adjusting body 30 is rotated 70 degrees clockwise from the first rotational phase (FIG. 4). In the communication region 20 in the third rotation phase, a part of the first hole portion 17b and the entire second hole portion 17c overlap the through hole 31. Thereby, the area of the communication region 20 is larger in the third rotational phase than in the second rotational phase (FIG. 5).

  Thus, by fixing the flow rate adjusting body 30 to a predetermined rotational phase along the circumferential direction of the second flow path 17, the overlapping state of the second flow path 17 and the through hole 31 in the fluid flow direction is changed. To determine the channel area. By changing the rotational phase of the flow rate adjusting body 30, the area (channel area) of the communication region 20 where the second channel 17 and the through hole 31 overlap can be set in at least three stages: small, medium, and large. . Thereby, it can adjust to the flow volume corresponding to a different supply object with the single flow volume adjustment body 30. FIG. As a result, the management of the flow rate adjusting body 30 is simplified, and the processing cost of the flow rate adjusting body 30 is reduced.

  As shown in FIGS. 1 to 3, a rib-shaped guide portion 19 c is formed on the convex portion 19 between the first hole portion 17 b and the second hole portion 17 c along the fluid flow direction. The guide portion 19 c is formed to protrude at a position close to the ball valve 11. Thereby, the ball valve 11 moves while being guided by the guide portion 19c. As a result, the movement of the ball valve 11 in the second flow path 17 becomes smooth, so that the opening / closing operation of the ball valve 11 is stabilized.

The flow rate adjusting body 30 only needs to have a different cross-sectional shape of the through hole 31 and a cross-sectional shape of the second flow path 17. Therefore, the through hole 31 may be formed on the outer peripheral side of the flow rate adjusting body 30.
The flow rate adjusting body 30 is fixed by caulking the inner surface 10 a of the valve housing member 10. Thereby, a separate member for fixing the flow rate adjusting body 30 is not required, and the fixing structure of the flow rate adjusting body 30 is simplified.

  The ball valve 11 is disposed between the valve seat member 14 and the flow rate adjusting body 30 in the second flow path 17, and is movable in the direction of the axis X between the valve seat 14 a and the surface portion 34. As described above, since the flow rate adjusting body 30 is disposed so as to face the valve seat 14a with the ball valve 11 interposed therebetween, movement of the ball valve 11 in the opening direction is restricted by the flow rate adjusting body 30. As described above, the flow rate adjusting body 30 can also be used as a movement restricting member for the ball valve 11, thereby reducing the number of parts constituting the flow rate adjusting structure.

  The connector portion 25 is provided to energize the coil 5, and the internal terminal terminal 26 is electrically connected to the coil 5. By electrically connecting the terminal terminal 26 to a current control device or the like (not shown), the current supplied to the coil 5 can be controlled.

  Next, the operation of the electromagnetic valve 1 will be described. When the coil 5 is not energized, the supply port 12 is blocked by the ball valve 11. When the coil 5 is energized from this state, a magnetic flux is generated in the magnetic circuit described above, and the plunger 7 is attracted in the axial direction toward the cylindrical portion 21 of the fixed core 2 and moves against the urging force of the spring 8. To do. As a result, the ball valve 11 is pushed by the fluid pressure from the supply port 12 and is separated from the valve seat 14a. As a result, the supply port 12 and the through hole 31 formed in the flow rate adjusting body 30 communicate with each other.

  The ball valve 11 separated from the valve seat 14a comes into contact with the surface portion 34 of the flow rate adjusting body 30 and stops. The insertion hole 33 of the plunger 7 formed in the protrusion 32 is closed by the ball valve 11. For this reason, the fluid supplied from the supply port 12 does not flow out of the insertion hole 33.

[Other Embodiments]
(1) In the above embodiment, the flow rate adjusting structure incorporated in the flow path 15 including the ball valve 11 in the electromagnetic valve 1 is shown. However, as shown in FIG. 7, the flow rate adjusting structure does not include a valve body. For example, 40 channels 15 may be provided. In the present embodiment, a convex portion 19 is formed to protrude on the inner peripheral side of the flow path 15. The flow rate adjusting body 30 is disposed so as to overlap the small diameter flow path 17 at the position of the convex portion 19, and is fixed to a predetermined rotation phase along the circumferential direction of the flow path 17.

(2) Although the electromagnetic two-way valve has been described in the above embodiment, the present invention is not limited to the electromagnetic two-way valve, and may be a three-way valve, such as a butterfly valve, an on / off valve, or a control valve other than the electromagnetic valve. Can also be adopted.

(3) In the above embodiment, an example in which the hole 31 formed in the flow rate adjusting body 30 is a through-hole is shown, but the hole 31 may be formed continuously in the direction of the flow path, for example, It may be a notch. Further, the flow rate adjusting body 30 may have an eccentric shape.

(4) In the above embodiment, an example in which the area of the communication region 20 is changed and set in three stages by changing the rotational phase of the flow rate adjusting body 30 has been described. It may be four or more.

  The flow rate adjusting structure according to the present invention can be widely used in the flow path space formed in the flow path member.

10: Valve housing member (flow path member)
11: Ball valve 14: Valve seat member 14a: Valve seat 15: Channel 17: Second channel (channel)
17a: central hole 17b: first hole portion 17c: second hole portion 19: convex portion 19c: guide portion 20: communication region 30: flow rate adjusting body 31: through hole (hole portion)
40: Channel member X: Shaft core (fluid flow direction)

Claims (4)

A flow path member having a flow path for circulating a fluid;
Protrusions provided on the inner peripheral surface of the flow path to define the flow path area;
A flow rate regulator that is disposed so as to overlap with the fluid flow direction with respect to the convex portion, and has a hole along the fluid flow direction.
The cross-sectional shape of the flow path at the position of the convex portion and the cross-sectional shape of the hole of the flow rate adjusting body are irregular,
By fixing the flow rate adjusting body at a predetermined rotational phase along the circumferential direction of the flow channel, the flow channel area is determined by changing the overlapping state of the flow channel and the hole in the fluid flow direction. Flow control structure to do.   The flow rate adjusting structure according to claim 1, wherein a ball valve is disposed in the flow path at the position of the convex portion, and the convex portion guides the movement of the ball valve. A valve seat of the ball valve is provided in the flow path;
The flow rate adjusting structure according to claim 2, wherein the flow rate adjusting body is disposed to face the valve seat with the ball valve interposed therebetween, and restricts movement of the ball valve.   The flow rate adjusting structure according to any one of claims 1 to 3, wherein the flow rate adjusting body is fixed by caulking to an inner surface of the flow path member.

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