Pressure regulating valve

Abstract

The objective is to provide a pressure regulating valve that eliminates foreign matter jamming and noise caused by vibration in the valve opening spring by suppressing the flow of fluid through the fluid path into the valve opening spring, thereby enabling smooth valve opening operation. [Solution] The pressure regulating valve 100a comprises a valve member 40 having a valve chamber 15 defined on its inner circumference, a guide portion 32 erected from around the valve seat 31c and having a radial communication hole 32a, a valve portion 41 provided within the guide portion 32, and a guide shaft portion 42 guided by the guide portion 32, a pressure-sensitive member 51 that displaces the valve portion 41, and a valve opening spring 6 provided on the outer circumference of the guide portion 32 that biases the valve portion 41 in the valve opening direction, wherein one end of the valve opening spring 6 is positioned on the other side of the valve housing 10 than the other end of the radial communication hole 32a. This eliminates foreign matter jamming in the valve opening spring 6 and noise caused by vibration, and allows for smooth valve opening operation.

Claims

1. A valve housing having an intermediate chamber and a pressure-sensitive member housing chamber that communicate sequentially from one side to the other, and a first port provided radially around an axis corresponding to the longitudinal direction of the pressure regulating valve and communicating with the intermediate chamber, A valve seat member integrally formed with a valve seat portion having a second port and a valve port that communicate sequentially from one side to the other, and a cylindrical guide portion provided in the intermediate chamber and erected from around the valve seat formed at the other end of the valve port, the guide portion defining a valve chamber on its inner circumference and having a plurality of radial communication holes that communicate between the valve chamber and the intermediate chamber in the radial direction centered on the axis, A valve member having a valve portion provided in the valve chamber within the guide portion and capable of moving closer to or further away from the valve seat, and a guide shaft portion extending to the other side and slidably guided by the guide portion, A pressure-sensitive member that displaces the valve portion in accordance with the pressure inside the pressure-sensitive member housing chamber, A valve opening spring is provided on the outer circumference of the guide portion and biases the valve portion in the valve opening direction, It has, The valve seat member is fixed in a through hole that penetrates axially at one end of the valve housing. A pressure regulating valve characterized in that the central axis of the first port and the central axis of the radial communication hole are located substantially on the same plane.

2. The pressure regulating valve according to claim 1, characterized in that one end of the valve opening spring is positioned on the other side of the valve housing than the other end of the radial communication hole.

3. The pressure regulating valve according to claim 2, wherein the inner circumference of the guide portion of the valve seat member has a sliding portion that slides with the guide shaft portion, and the sliding portion and the valve port are coaxially machined.

4. The inner circumference of the guide portion is adjacent to one side of the sliding portion and further has a relief portion that is continuously connected to the inner diameter portion of the radial communication hole. The pressure regulating valve according to claim 3, characterized in that the inner diameter of the relief portion is larger than the inner diameter of the sliding portion.

5. One end of the valve opening spring is supported on the outer circumference of the guide portion. The pressure regulating valve according to claim 1, characterized in that the other end of the valve opening spring is supported at the other end of the guide shaft.

6. It further comprises a one-sided spring receiving portion having an annular portion, The outer circumference of the guide portion has a stepped portion that decreases in diameter from one side to the other. The pressure regulating valve according to claim 5, characterized in that the annular portion of the one-side spring receiving portion engages with the stepped portion of the guide portion and supports one end of the valve opening spring.

7. The pressure regulating valve according to claim 6, characterized in that the one-sided spring receiving portion is erected from the inner circumference side of the annular portion, engages with the outer circumference of the guide portion, and further has a cylindrical portion that guides the inner diameter portion of the valve opening spring.

8. The pressure regulating valve according to claim 6, characterized in that the intermediate chamber and the pressure-sensitive member housing chamber are in communication via an annular gap between the outer peripheral end of the one-side spring receiving portion and the inner wall of the intermediate chamber.

9. The pressure regulating valve according to claim 8, characterized in that the area of ​​the annular gap is smaller than the sum of the opening areas in the radial communication holes.

10. The pressure regulating valve according to claim 9, characterized in that, with respect to the central axis of the first port, one end of the one-side spring support portion is positioned at a distance greater than the inner wall of the intermediate chamber facing the one end of the one-side spring support portion.

11. The pressure regulating valve according to claim 10, characterized in that the central axis of the first port and the central axis of the radial communication hole facing the first port are common.

12. The valve housing further comprises a ball support member fixed to the inner circumferential surface and having an annular shape, and a ball housed in the ball support member. The pressure regulating valve according to claim 11, wherein the ball is disposed between the valve member and the pressure-sensitive member, and the diameter of the ball is larger than the gap on one side between the valve member and the valve housing.

13. The pressure regulating valve according to any one of claims 1 to 12, characterized in that the pressure-sensitive member is a pressure-sensitive bellows.

14. The flow direction is from the first port to the second port, The pressure regulating valve according to claim 13, characterized in that the diameter of the valve port is smaller than the average inner diameter of the pressure-sensitive bellows.

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