JP5487832B2 - Fluid valve and hydraulic pump and solenoid valve using the same - Google Patents

Description

  The present invention relates to a fluid valve employed in a vehicle brake hydraulic pressure control device and the like, and a hydraulic pump and an electromagnetic valve using the fluid valve. The fluid valve referred to here is a valve including a spherical valve body that is employed for the purpose of regulating the flow direction of fluid in one direction.

  For example, the vehicle brake hydraulic pressure control device described above has a power-driven hydraulic pump. In the hydraulic pump, a check valve is incorporated in the discharge port for the purpose of preventing the backflow of the discharge liquid. As a conventional example of the check valve, for example, there is one disclosed in Patent Document 1 below.

  The fluid valve (check valve) disclosed in Patent Document 1 applies a force of a coil spring to a spherical valve element housed in a valve chamber via a transmission member, and the valve element is used as a valve seat by the force. I'm seated. In addition, when the valve body is separated from the seat surface of the valve seat, the outflow path that sends the fluid flowing into the valve chamber downstream is perpendicular to the inflow path that communicates with the valve chamber (outflow with respect to the axis of the inflow path). The direction in which the axis of the road forms a right angle). Furthermore, the point of application of the force of the coil spring applied to the valve body via the transmission member is biased from the extension line of the axis of the inflow path to the side opposite to the side where the outflow path is formed.

  In the check valve of Patent Document 1, due to the structure described above, the valve element that has moved to the valve opening position due to the pressure difference acting on the pressure receiving surface is pressed against the wall surface on the outflow passage forming side of the valve chamber by the force of the coil spring. The valve body at this time comes into contact with the valve seat, the wall surface of the valve chamber, and the transmission member that receives the force of the coil spring at three points. By creating such a contact state, vibration due to pulsation of the valve body is suppressed.

JP 2004-068811 A

  In the check valve of Patent Document 1, the valve body contacts the valve seat, the wall surface of the valve chamber, and the transmission member on a surface parallel to the axis of the outflow path. In addition, the transmission member is a movable member using a ball or the like. If the fluid pressure introduced into the valve chamber fluctuates rapidly, the movable member may be displaced. For this reason, the valve body is not stably fixed at the valve opening position, and vibration suppression of the valve body may be insufficient.

  The check valve of Patent Document 1 remains uneasy about the pulsation of the piston pump for the above-described reason. In addition, since the pump discharge amount increases and the amount of fluid passing through the check valve increases, the flow of fluid around the valve body is disturbed, and the possibility that the valve body vibrates increases. If the vibration is severe, the valve body and the valve seat may have dents (scratches) and the sealing performance of the valve part may be lost.

  In order to prevent the vibration of the valve body from being effectively suppressed and to amplify the pulsation when used as a pump discharge valve, and to prevent noise caused by the vibration. As the amount of fluid passing through the valve increases, even when the flow of fluid around the valve body is likely to be disturbed, it is an object to stably support the valve body at the valve opening position. .

In order to solve the above-described problems, in the present invention, the fluid valve includes a spherical valve body, a valve chamber that houses the valve body, a valve seat that faces the valve chamber that contacts and separates the valve body, and An inflow path that communicates with the valve chamber when the valve body is separated from the seat surface of the valve seat, and an outflow path that sends the fluid that has flowed into the valve chamber from the inflow path downstream.
The inner surface of the valve chamber includes a plurality of wall surfaces inclined with respect to the axis of the inflow passage that supports the valve element separated from the seat surface at three or more points, and one of the wall surfaces is the valve seat. In addition, other wall surfaces are respectively formed in the valve chamber, and a straight line connecting the contact points of the valve body with the plurality of wall surfaces defines a polygon, and the center of the polygon and the valve body are separated from the seat surface. Thus, the outflow passage is opened on a line connecting the valve body centers when the plurality of wall surfaces are supported at three or more points.

  The contact point of the valve body referred to here is not necessarily the point where the valve body makes point contact with the wall surface of the valve chamber. If the wall surface is flat, the contact of the valve body is close to a point. However, depending on the shape of the wall surface, the valve body may be in line contact or surface contact with a plurality of wall surfaces of the valve chamber. In such a situation, when the valve body abuts against the wall surface of the valve chamber, the center of the contact portion is considered as the contact point, and the wall surface that becomes the support surface at the position where the polygon is drawn when the contact point is connected by a straight line Is installed. In the present invention, the inflow channel side is considered upstream and the outflow channel side is considered downstream.

Preferred forms of this fluid valve are listed below.
(1) The center of the polygon defined by a straight line connecting valve body contact points to the plurality of wall surfaces and the valve body away from the seat surface at three or more points on the plurality of wall surfaces. It is arranged at the position where the axis of the outflow path coincides with the line connecting the center of the valve body when it is in the supported position.
(2) Between the outer periphery of the valve body and the inner surface of the valve chamber when the valve body is in a valve open position (a position that is supported by a plurality of wall surfaces apart from the seat surface). The substantial flow channel area of the generated flow channel is made smaller than the flow channel area in the cross section perpendicular to the axis of the outflow channel (hereinafter simply referred to as the flow channel area of the outflow channel).
(3) There are three valve element contact points with respect to the plurality of wall surfaces, and a polygon drawn by a straight line connecting the three points forms an equilateral triangle, and the center of the equilateral triangle and the valve element are separated from the seat surface. The outflow path is arranged at a position where the axial center of the outflow path coincides with a line connecting the valve body center when the plurality of wall surfaces are supported at three points.
(4) The outflow channel is formed as a channel having an inclination with respect to the axis of the inflow channel.
(5) The outflow path is formed as a flow path perpendicular to the axis of the inflow path.
(6) A biasing means that biases the valve body in the valve closing direction and presses the valve body against the seat surface of the valve seat is included.
(7) What was comprised as a non-return valve which accept | permits the flow of the fluid which goes to the said outflow path from the said inflow path, and prevents a backflow.

The present invention includes a hydraulic pump provided at a discharge port using the above-described fluid valve as a discharge valve;
It has a valve part that opens and closes a passage by bringing a valve element operated by magnetic attraction force into and out of the valve seat, and the above-described fluid valve is used as a check valve in a bypass arranged in parallel with the fluid passage passing through the valve part. An arranged solenoid valve is also provided.

  In the fluid valve of the present invention, the valve element that has moved away from the seating surface to the valve opening position is pressed against the plurality of wall surfaces provided on the inner surface of the valve chamber at three or more points. The contact point of the valve body with respect to the wall surface at this time is formed on a surface intersecting with the outflow passage (a virtual surface facing the direction of fluid flow from the valve chamber toward the outflow passage).

  Moreover, the outflow path is on a line connecting the center of the polygon defined by a straight line connecting the contact points of the valve body and the center of the valve body when the valve body is in a position supported by a plurality of wall surfaces at three or more points. By opening, the force which the fluid which flowed into the valve chamber pushes a valve body to the outflow path side generate | occur | produces.

  Therefore, a situation is created in which the valve body pressed in the axial direction of the outflow passage in response to the fluid flow is received by a surface in a direction that blocks the front in the pressing direction, and the wall surface that supports the valve body is a fixed surface. Thus, displacement due to fluctuations in fluid pressure does not occur, so that the support at the valve opening position of the valve body is stabilized, and vibration of the valve body is effectively suppressed. This action prevents pulsation amplification and noise generation due to the vibration of the valve body.

  This fluid valve changes the position of the center of the polygon drawn by the straight line connecting the valve element contact points by controlling the angle of inclination of the valve chamber wall surface against which the valve element contacts with the axis of the inflow path. Can do. In order to create a degree of freedom in setting the center position of the polygon and to make it possible to impart a wedge effect to the valve body moved to the valve opening position, the wall surface of the valve chamber that abuts the valve body on the axis of the inflow path Tilted against.

  The operation and effect of the preferred embodiment will be described later.

Sectional drawing which shows an example of the fluid valve of this invention Sectional view along the line II-II in FIG. Sectional view showing the fluid valve of the reference example Sectional view along line III-III in FIG. Sectional drawing which shows the other example of the fluid valve of this invention Sectional drawing which shows the other example of the fluid valve of a reference example Circuit diagram of hydraulic pump of the present invention Circuit diagram of solenoid valve of the present invention

Embodiments of a fluid valve of the present invention, a hydraulic pump and an electromagnetic valve using the fluid valve will be described below with reference to FIGS. 1 , 2, 5, 7, and 8 of the accompanying drawings. 3, 4 and 6 are reference examples.

  1 and 2 show a first embodiment of the fluid valve of the present invention. The fluid valve 10 is used as a check valve, and includes a spherical valve body 1, a valve chamber 2 that houses the valve body 1, a valve seat 3 that contacts and separates the valve body 1, and a valve An inflow path 4 that communicates with the valve chamber 2 when the body 1 is separated from the seat surface 3a of the valve seat 3 and an outflow path 5 that sends the fluid that has flowed into the valve chamber 2 from the inflow path 4 downstream. Yes.

  In the illustrated fluid valve 10, the valve seat 3 facing the valve chamber 2 is formed integrally with the housing 6, but a valve seat separate from the housing may be attached to the housing. Further, the case 7 is fixed to the housing 6 and the valve chamber 2 is created by the case 7 and a part of the housing 6. However, the valve chamber 2 may be formed integrally with the housing 6.

The valve chamber 2 is provided with a plurality of wall surfaces that support the valve element 1 moved to the valve opening position (away from the seating surface 3a) at three or more points. The illustrated fluid valve supports the valve body 1 at three points A, B, and C shown in FIG. 2, and the wall surface has three surfaces F ₁ , F ₂ , and F ₃ . A straight line connecting the valve contact points A, B, and C with respect to these wall surfaces forms a triangle (see FIG. 2). An outflow path 5 is formed on a line connecting the triangular center D _O and the valve body center B _O when the valve body 1 is at the valve opening position (chain line position in FIG. 2).

The outflow path 5 is preferably formed so that the line connecting the center D _{O of the} triangle and the valve body center B _O at the valve opening position coincides with the axis L2 of the outflow path, and thereby the flow into the valve chamber The direction in which the fluid presses the valve body against the plurality of wall surfaces and the flow direction of the fluid from the valve chamber toward the outflow path can be matched to further stabilize the pressing of the valve body against the wall surface.

  There may be four or more contact points of the valve body with respect to the wall surface of the valve chamber, and if the polygon drawn by the straight line connecting the contact points is a regular polygon (the one shown is a regular triangle), the support points are arranged. Is balanced and the support stability of the valve body is improved.

A wall surface F ₁ in the illustrated fluid valve is formed in the valve seat 3. The other two wall surfaces F ₂ and F ₃ are formed in the case 7. Wall F ₁ is configured by a surface obtained by extending the seat face 3a of the valve seat, all the walls may be formed in the case 7.

Wall F _1, the upper is inclined in a direction away from the axis L1 of the inlet channel 1, the wall F _2, F ₃ is inclined in the opposite direction to the direction inclined wall surface F ₁ in FIG. 1. Further, the wall surfaces F ₂ and F ₃ are further inclined so as to form an inverted V shape in FIG. 2, whereby the wall surface F ₁ , F ₂ , and F ₃ have an outflow path 5 between them rather than the right side in FIG. There is a space in which a certain left side is narrowed, and the valve body 1 is pushed into the space, so that the valve body 1 is positioned at a predetermined position. In the present invention, this is called the wedge effect. Due to the wedge effect, the valve body at the valve opening position (chain line position in FIG. 2) is more effectively suppressed from swinging in the radial direction.

In the fluid valve of FIG. 1, the total flow path area of the flow path 8 (FIG. 2) generated between the valve body 1 in the valve opening position and the inner surface of the valve chamber 2 is smaller than the flow path area of the outflow path 5. For this reason, a difference is generated between the fluid pressure in the valve chamber 2 and the fluid pressure in the outflow passage 5, and the pressure difference effectively acts on the valve body to increase the force for pressing the valve body 1 against the wall surfaces F _{1 to} F ₃ . Accordingly, the holding of the valve body at the valve opening position is more stable.

  As described above, the structure in which the valve body 1 is brought into contact with the wall surface of the valve chamber at three points can minimize the number of wall surfaces with which the valve body is brought into contact, which is advantageous in terms of manufacturing and cost. . It is also easy to produce a wedge effect on the valve bodies that are inclined against the wall surfaces by tilting each wall surface in the above-described direction.

The fluid valve of FIG. 3 forms _four wall surfaces F _{1 to} F ₄ around the valve chamber side opening of the outflow passage 5 (see FIG. 4), and the valve body 1 is brought into contact with the wall surfaces F _{1 to} F _4. The contact points of the valve body are formed at four locations A, B, C, and D. Here, the polygon drawn by connecting these contact points with a straight line is made square, and is coaxial with the line connecting the center of the square and the valve body center _BO when the valve body 1 is in the valve opening position. The outflow channel 5 is arranged above.

Further, the wall surfaces F _{1 to} F ₄ arranged at a constant pitch in the circumferential direction are inclined in a direction along a conical surface concentric with the outflow passage 5, and the wedge effect described above is also obtained.

  As shown in FIG. 5, the fluid valve of the present invention includes a biasing means (that is, a coil spring in the figure) 9 that biases the valve body 1 in the valve closing direction and presses it against the seat surface 3a of the valve seat. It may be. With the urging means 9, the fluid valve can be used in a posture where the axis of the inflow path is not vertical.

The outflow path 5 is not limited to the flow path of FIG. 1 that is perpendicular to the axis L1 of the inflow path 4. Even with respect to the axis L1 is formed as a channel having a slope at an angle other than 90 ° have good. As shown in FIG. 3, the axis L1 of the inflow channel 4 and the axis L2 of the outflow channel 5 are arranged on the same axis, or the outflow channel 5 is arranged in a position parallel to the inflow channel 4 as shown in FIG. Are excluded from the present invention.

When the outflow passage 5 is formed as a flow passage having an inclination of 90 ° or other angle with respect to the axis L1 of the inflow passage 4, it is easy to secure a space for incorporating the biasing means 9 in FIG. .
In general, in suppressing the vibration of the valve body due to turbulent flow, the flow valve diameter is increased and the flow channel area is increased to suppress the occurrence of turbulent flow itself. Even if the flow becomes turbulent, it is possible to stabilize the position of the valve body when the valve is opened and to reduce the generation of sound due to vibration and the reduction of pulsation amplification without increasing the size of the fluid valve.

  The fluid valve of the present invention described above allows the flow of fluid from the inflow path to the outflow path and serves as a check valve that prevents backflow or prevents backflow of liquid discharged from the hydraulic pump to the pump chamber. It can be used as a discharge valve (also a check valve).

  FIG. 7 shows a hydraulic pump that is driven by power and sucks and discharges liquid, and includes the above-described fluid valve 10 as a discharge valve at the discharge port. The hydraulic pump 11 may be a piston pump, but if it is a metering pump such as a gear pump, the effect of the present invention is remarkably exhibited.

  In applications where pulsation is avoided, metering pumps such as gear pumps, vane pumps, and screw pumps are used as hydraulic pumps. Even when the metering pump is used, when the turbulent flow region is reached due to an increase in flow rate, vortexing of the flow due to turbulence occurs, and the flow further increases, resulting in finer vortices and slight vibration of the valve body. May be amplified and the valve body may vibrate violently. As a result, adverse effects on the durability of the valve section and the generation of noise are unavoidable, and the meaning of using an expensive metering pump is lost. By providing the fluid valve of the present invention as a discharge valve, the advantages of the metering pump can be utilized.

  FIG. 8 has a valve portion (not shown) that opens and closes a passage by bringing a valve body operated by a magnetic attractive force into and out of contact with a valve seat, and a detour 12a arranged in parallel with a fluid passage passing through the valve portion. The above-described fluid valve 10 is an electromagnetic valve arranged as a check valve. This solenoid valve 12 is also an invention. Even with an electromagnetic valve, there is a concern that turbulence may occur if the flow of liquid flowing by opening the check valve is fast. By using the fluid valve of the present invention as a check valve, the performance against the turbulent flow can be stabilized.

  The fluid valve according to the present invention includes circuit components of a vehicle brake fluid pressure control device having an electronic control function such as ABS (anti-lock brake system), ESC (Electronic Stability Control), and fluid pressures other than the brake fluid pressure control device. It can be effectively used as a circuit component of the apparatus.

First valve body and second valve chamber 3 valve seat 3a seat surface 4 inlet channel 5 outflow passage 6 Housing 7 Case 8 passage 9 biasing means 10 fluid valve 11 of the hydraulic pump 12 solenoid valves 12a detour _F 1 to F ₄ valve body the axis of the center B _O valve center L1 inlet channel axis L2 outflow tract of the contact point D _O triangle of the valve element against the wall A~D wall of the valve chamber to abut

Claims (10)

A spherical valve body, a valve chamber housing the valve body, a valve seat facing the valve chamber for contacting and separating the valve body, and the valve body when the valve body is separated from the seat surface of the valve seat An inflow path communicating with the chamber, and an outflow path for sending the fluid that has flowed into the valve chamber from the inflow path downstream,
The inner surface of the valve chamber includes a plurality of wall surfaces inclined with respect to the axis of the inflow passage that supports the valve element separated from the seat surface at three or more points, and one of the wall surfaces is the valve seat. In addition, other wall surfaces are respectively formed in the valve chamber, and a straight line connecting the contact points of the valve body with the plurality of wall surfaces defines a polygon, and the center of the polygon and the valve body are separated from the seat surface. A fluid valve in which the outflow passage is open on a line connecting the center of the valve body when the plurality of wall surfaces are supported at three or more points.   The center of the polygon defined by a straight line connecting valve body contact points with the plurality of wall surfaces and the valve body are supported by the plurality of wall surfaces at three or more points away from the seat surface. The fluid valve according to claim 1, wherein the fluid valve is disposed at a position where the axial center of the outflow path coincides with a line connecting the center of the valve body at the position.   A substantial flow of the flow path generated between the valve body and the inner surface of the valve chamber when the valve body is at a position supported by the plurality of wall surfaces at three or more points away from the seat surface. The fluid valve according to claim 1 or 2, wherein a passage area is smaller than a passage area in a cross section perpendicular to the axis of the outflow passage.   The contact point of the valve body with respect to the plurality of wall surfaces is three points, and a polygon drawn by a straight line connecting the three points forms an equilateral triangle, and the center of the equilateral triangle and the valve body are separated from the seating surface, 4. The outflow passage is arranged at a position where the axial center of the outflow passage coincides with a line connecting the valve body center when it is at a position supported at three points on the wall surface of the airflow passage. The fluid valve described in 1.   The fluid valve according to any one of claims 1 to 4, wherein the outflow path is formed as a flow path having an inclination with respect to an axis of the inflow path.   The fluid valve according to any one of claims 1 to 4, wherein the outflow path is formed as a flow path perpendicular to the axis of the inflow path.   The fluid valve according to claim 1, further comprising an urging unit that urges the valve body in a valve closing direction and presses the valve body against a seating surface of the valve seat.   The fluid valve according to any one of claims 1 to 7, wherein the fluid valve is configured as a check valve that allows a fluid flow from the inflow path toward the outflow path and prevents backflow. A pump that is driven by power and sucks and discharges liquid, and is provided at a discharge port of the pump.
A hydraulic pump comprising the fluid valve according to any one of -8 as a discharge valve. A valve element that opens and closes a passage by bringing a valve element operated by a magnetic attractive force into and out of contact with a valve seat, and a bypass arranged in parallel with a fluid passage that passes through the valve part, according to any one of claims 1 to 8. A solenoid valve in which the fluid valve described is arranged as a check valve.

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