JP2016184260A - Pressure control valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure control valve that can improve the pressure control characteristic (responsiveness) and suppress the air flow sound (whistle sound) by improving the slidability of a valve and preventing the tilt of the valve.SOLUTION: A pressure control valve 10 includes: a pressure control chamber 11 that controls the pressure of fuel gas; a valve chamber 12 that communicates between an entrance terminal 8 and the pressure control chamber 11; a valve 13 disposed slidably in the valve chamber 12; a valve seat 14 that sections between the valve chamber 12 and the pressure control chamber 11; a coil spring 16 that energizes the valve 13 toward a valve seat member; and a piston 15 that is disposed facing the valve 13 with the valve seat 14 interposed therebetween. The valve 13 includes inner paths 136 (136a, 136b) formed on the inside, and sliding members 135a, 135b disposed in the sliding portion with the valve chamber 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pressure adjustment valve that reduces the pressure of a high-pressure gaseous fuel to adjust it to a desired pressure.

  As a pressure regulating valve that regulates the pressure of the gaseous fuel, for example, a pressure regulating chamber that regulates the pressure of the gaseous fuel, a valve chamber that communicates the inlet and the regulating chamber, and a slidable arrangement within the valve chamber A valve body, a valve seat member that divides the valve chamber and the pressure regulating chamber, a biasing member that biases the valve body toward the valve seat member, and a position facing the valve body with the valve seat member interposed therebetween. Some are equipped with a piston. In this type of pressure regulating valve, a plurality of fuel passages (gap between the valve chamber and the valve body) through which gaseous fuel flows are formed on the outer side (outer peripheral side) of the valve body, and the valve body is formed in the valve seat member. The pressure in the pressure regulating chamber is maintained at a desired pressure regulation value by contact and separation (see Patent Document 1).

JP2013-206360A

  However, in the above pressure regulating valve, since there is no lubricity due to the fluid (gaseous fuel) flowing through the pressure regulating valve, the resistance when the valve body slides increases, and the pressure regulation characteristic (responsiveness) deteriorates. There is a risk. In addition, when the flow passage areas of the fuel passages formed outside the valve body are different due to manufacturing errors, etc., when high-pressure gaseous fuel is supplied to the pressure regulating valve, the flow rates of the fuel passages become uniform. A bias will occur. If it does so, a valve body will incline and there exists a possibility that a pressure regulation characteristic (responsiveness) may deteriorate, or there exists a possibility that an airflow sound (a whistling sound) may generate | occur | produce.

  Therefore, the present invention has been made to solve the above-described problems, and improves the pressure regulation characteristics (responsiveness) by improving the slidability of the valve body and preventing the valve body from tilting. It is an object of the present invention to provide a pressure regulating valve that can suppress the generation of airflow sound and whistling sound.

  One form of the present invention made to solve the above problems is a pressure regulating chamber that adjusts the pressure of fluid, a valve chamber that communicates the inlet and the pressure regulating chamber, and a slidable arrangement in the valve chamber. The valve body, a valve seat member that partitions the valve chamber and the pressure regulating chamber, a biasing member that biases the valve body toward the valve seat member, and a position facing the valve body across the valve seat member In the pressure regulating valve having the piston, the valve body includes a fluid passage formed therein and a sliding member disposed in a sliding portion with the valve chamber.

  In this pressure regulating valve, the sliding property between the valve element and the valve chamber (the inner peripheral surface thereof) is improved by the sliding member. Moreover, since the fluid flow path is provided inside the valve body, it is possible to prevent the valve body from being inclined due to a flow rate deviation. For these reasons, since the sliding resistance of the valve body is reduced and the valve body does not tilt, the valve body slides smoothly, so that pressure regulation characteristics (responsiveness) can be improved. Further, the flow can be made uniform without tilting the valve body, and the generation of airflow sound (flute sound) can be suppressed. Further, it is possible to eliminate the rubbing sound (sound generated by rubbing the metal members) generated when the valve body slides.

  In the pressure regulating valve described above, it is desirable that a plurality of the sliding members are arranged on the valve body.

  With such a configuration, since the valve body is supported by the sliding member at a plurality of locations, the valve body can be reliably prevented from tilting.

  In the pressure regulating valve described above, the sliding member is disposed on the upstream side and the downstream side of the valve body, respectively, and the valve body is interposed between the sliding members by the sliding member. A branch passage that communicates the space formed between the valve body and the valve chamber and the fluid passage may be provided.

  When high-pressure fluid (gas) is supplied to the pressure regulating valve, the pressure rise in the space formed between the valve body and the valve chamber by the sliding member between the sliding members is delayed. Differential pressure acts. Then, due to the differential pressure, the sliding member is deformed (out of the arrangement position), the slidability of the valve body is deteriorated and the valve body is inclined, and the pressure regulation characteristic (responsiveness) may be deteriorated. There is.

  However, with the above configuration, the fluid passage and the space formed by the sliding member between the valve body and the valve chamber are communicated between the sliding members via the branch passage. Even when a high-pressure fluid (gas) is supplied to the pressure regulating valve, it is possible to reliably prevent the differential pressure from acting on the sliding member. Therefore, deformation of the sliding member can be prevented, and pressure regulation characteristics (responsiveness) can be improved.

  According to the pressure regulating valve of the present invention, the slidability of the valve body is improved and the valve body is prevented from being tilted, so that the pressure regulation characteristic (responsiveness) is improved and the air flow sound (the whistling sound) Occurrence can be suppressed.

It is a whole sectional view of a pressure regulation valve concerning an embodiment. It is an expanded cross section of the valve body and valve chamber periphery of an upstream pressure regulating valve. It is an expanded section of the valve body and valve chamber periphery in a 1st modification. It is an expanded cross section of the valve body and valve chamber periphery in a 2nd modification.

  A pressure regulating valve according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view of a pressure regulating valve according to this embodiment. FIG. 2 is an enlarged cross section around the valve body and the valve chamber of the upstream pressure regulating valve.

<Overall structure of pressure regulating valve>
As shown in FIG. 1, the pressure regulating valve 10 according to the present embodiment includes an upstream pressure regulating valve 1 located upstream, a downstream pressure regulating valve 2 located downstream, and after pressure reduction by the upstream pressure regulating valve 1. The body member 7 is provided with a middle passage 3 through which the fuel gas G before decompression by the downstream pressure regulating valve 2 passes and a check valve 4 connected to the middle passage 3, and the fuel gas G is decompressed in multiple stages. However, it is a multistage pressure regulating valve that regulates to a desired pressure. In the present pressure regulating valve 10, an upstream pressure regulating valve 1, a downstream pressure regulating valve 2, an intermediate passage 3, a check valve 4, and the like are formed inside a body member 7 made of aluminum alloy. The upstream pressure regulating valve 1 and the downstream pressure regulating valve 2 are connected in series.

  The fuel gas G is, for example, hydrogen gas supplied to the vehicle fuel cell (FC), and the fuel gas G stored in the fuel tank is supplied or stopped on the upstream side of the pressure regulating valve 10. A main stop valve is connected, and an injector for supplying fuel gas G adjusted to a desired pressure to the fuel cell is connected to the downstream side of the pressure adjusting valve 10 (not shown). The fuel gas G stored in the fuel tank may be filled at a pressure of about 80 to 90 MPa depending on the filling equipment. On the other hand, the pressure of the fuel gas G supplied from the pressure regulating valve 10 to the injector is reduced to a pressure of about 1.0 to 1.5 MPa. Therefore, the pressure regulating valve 10 is, for example, decompressed from about 80 to 90 MPa to about 3.0 to 2.5 MPa by the upstream pressure regulating valve 1 and about 3.0 to 2 by the downstream pressure regulating valve 2. The pressure is reduced from about 5 MPa to about 1.0 to 1.5 MPa.

  A cylindrical projection 73 projecting upward is formed at the upper left end of the body member 7. A terminal block 74 formed in a hexagonal column shape is screwed to the cylindrical convex portion 73 from above. The terminal block 74 is formed with an inlet terminal 8 that opens upward and is connected to the main stop valve. In addition, an outlet terminal 6 that opens to the right and is connected to the injector is formed at the upper right end of the body member 7.

(Upstream pressure regulating valve)
The upstream pressure regulating valve 1 includes a valve chamber 12 that communicates with the inlet terminal 8, a valve body 13 that moves up and down in the valve chamber 12, and a valve that is formed at the lower end of the valve chamber 12 and contacts and separates from the valve body 13. A seat 14, a pressure regulating chamber 11 that is positioned below the valve seat 14 and communicates with the valve chamber 12 when the valve element 13 moves upward, a piston 15 that moves up and down in the pressure regulating chamber 11, and a piston 15 A coil spring 16 that urges upward, a holding member 17 that contacts the lower end of the coil spring 16 and holds the coil spring 16, and a stop member 18 that screws the holding member 17 to the body member 7 so that the height of the holding member 17 can be adjusted; It has. The piston 15 is disposed ahead of the valve body 13 in the urging direction of the valve spring 133.

  An inlet terminal passage 81 is formed vertically between the inlet terminal 8 and the valve chamber 12. A valve spring 133 (biasing member) that biases the valve body 13 downward (in the direction toward the valve seat 14) is interposed between the valve chamber 12 and the valve body 13. The valve body 13 includes a cylindrical main body portion 134, a conical tapered portion 132, and a needle-like needle portion 131. A valve spring 133 is attached to the main body 134. The tapered portion 132 is formed below the main body portion 134 and is a portion that contacts the valve seat 14. The needle portion 131 is formed below the tapered portion 132 and extends through the through hole formed in the valve seat 14 to the pressure regulating chamber 11. The lower end of the needle portion 131 is in contact with the distal end surface of the shaft protrusion 153 that protrudes from the upper end of the main body of the piston 15.

  As shown in FIG. 2, annular sliding members 135a and 135b are attached to the valve body 13 as described above. The sliding members 135a and 135b are mounted in circumferential grooves 13a and 13b formed on the upstream side and the downstream side (both ends in the axial direction) of the main body 134, respectively. The valve body 13 is disposed in the valve chamber 12 with these sliding members 135 a and 135 b in contact with the inner peripheral surface of the valve chamber 12. Thereby, the sliding members 135a and 135b and the inner peripheral surface of the valve chamber 12 slide and the valve body 13 tilts without the outer peripheral surface of the valve body 13 contacting the inner peripheral surface of the valve chamber 12. Instead, the valve chamber 12 is moved up and down. As the sliding members 135a and 135b, for example, a resin material such as PTFE can be used.

  Further, an internal passage 136 is formed in the valve body 13. The internal flow path 136 is composed of a first internal flow path 136a and a second internal flow path 136b. The first internal flow path 136 a is formed vertically (in the axial direction) inside the main body portion 134 and the tapered portion 132 of the valve body 13. The second internal passage 136 a is formed horizontally inside the tapered portion 132 of the valve body 13 and communicates with the first internal passage 136 a and the valve chamber 12. That is, the upstream side and the downstream side of the valve chamber 12 communicate with each other through the internal passage 136 of the valve body 13.

  An annular seal member 151 that slides in contact with the inner peripheral edge of the pressure regulating chamber 11 and seals the pressure regulating chamber 11 is fitted to the outer peripheral edge of the main body portion of the piston 15. The annular seal member 151 has a lip-shaped cross section that opens upward in a V shape. A spring seat 154 that holds the coil spring 16 is formed in a concave shape at the lower end of the piston 15. The spring seat 154 is formed horizontally and is in contact with the coil end 161 of the coil spring 16. A sliding member 152 made of fluororesin is mounted on the outer peripheral wall of the spring seat 154. The holding member 17 in contact with the lower end of the coil spring 16 is formed with a vent 171, and the stopper member 18 is engaged with a filter member 19 for the outside air introduced through the vent 171. The pressure regulating chamber 11 is communicated with the valve chamber 22 of the downstream pressure regulating valve 2 through the middle passage 3 (31, 32, 33) as will be described later.

(Downstream pressure regulating valve)
The downstream pressure regulating valve 2 includes a pressure regulating chamber 21 that communicates with the outlet terminal 6, a piston 24 that moves up and down in the pressure regulating chamber 21, a coil spring 25 that biases the piston 24 upward, and a pressure regulating chamber 21. , A substantially cylindrical valve body 241 extending to the valve chamber 22 along the shaft portion of the piston 24, and a lower end portion of the valve body 241 formed at the lower end of the valve chamber 22. A valve seat 26 that contacts and separates, a stop member 27 that is fitted into the valve seat 26 and is screwed to the lower right end of the body member 7, and is screwed to the stop member 27 so that the height of the valve seat 26 can be adjusted. And an adjusting screw 28 formed.

  The pressure regulating chamber 21 is sealed by a lid member 23 fitted from the upper right end of the body member 7. Below the axis of the lid member 23, a columnar convex portion is formed that contacts the upper end portion of the piston 24 and restricts the upward movement of the piston 24. An annular space is formed in the pressure regulating chamber 21 when the columnar convex portion comes into contact with the upper end portion of the piston 24. Between the pressure regulating chamber 21 and the outlet terminal 6, an outlet terminal passage 61 that communicates both is formed horizontally.

  A cylindrical through hole 2411 is formed at the axial center of the piston 24 and the valve body 241 from the upper end of the piston 24 to the lower end of the valve body. An annular seal member 242 that slidably contacts the inner peripheral edge of the pressure regulating chamber 21 and seals the pressure regulating chamber 21 is fitted to the outer peripheral edge of the piston 24. The annular seal member 242 has a lip-shaped cross section that opens upward in a V shape. A spring seat 246 that holds the coil spring 25 is recessed at the lower end of the piston 24. The coil spring 25 is a cylindrical compression spring. The position of the lower end of the coil spring 25 is restricted by a holding portion 247 formed integrally with the body member 7.

  An annular seal member 243 that slidably contacts the outer peripheral edge of the valve body 241 and seals the valve chamber 22 is fitted below the holding portion 247. The annular seal member 243 has a lip-shaped cross section that opens downward (valve chamber side) in a V shape. A bearing portion 245 that pivotally supports the valve body 24 in the vertical direction is mounted below the annular seal member 243. The bearing portion 245 also serves as a drop stopper for the annular seal member 243. The valve chamber 22 is formed in a substantially cylindrical shape below the bearing portion 245.

(Middle aisle)
The middle passage 3 includes a first middle passage 31 formed horizontally from the pressure regulating chamber 11 of the upstream pressure regulating valve 1 and a second middle passage 32 formed horizontally from the valve chamber 22 of the downstream pressure regulating valve 2. And a third middle passage 33 that communicates the first middle passage 31 and the second middle passage 32 in the vertical direction. The body member 7 is formed with a middle passage machining hole 72 for machining the first middle passage 31 and a middle passage machining hole 72 for machining the second middle passage 32. Sealing members 9 and 9 for sealing the respective middle passage processing holes 72 and 72 are fastened to the outer wall surface 71 of the body member 7. A check valve 4 to be described later is disposed above the third middle passage 33. Between the inlet portion 42 of the check valve 4 and the third middle passage 33, a check valve inlet passage 52 is formed in the up-down direction for communicating both.

(Check valve)
The check valve 4 is an inside air check valve, and includes a valve chamber 41, an inlet portion 42 of the valve chamber 41, a ball valve 43 that is accommodated in the valve chamber 41 and contacts and separates from the inlet portion 42, and a ball A pressing spring 44 that urges the valve 43 toward the inlet portion 42, a sealing member 46 that holds the pressing spring 44 and seals the valve chamber 41 against the body member 7, and an outlet portion 47 of the valve chamber 41. I have. A check valve outlet passage 51 is formed between the outlet 47 and the pressure regulating chamber 21 of the downstream pressure regulating valve 2 so as to communicate the both. The check valve outlet passage 51 is formed coaxially with the outlet terminal passage 61.

<Operation method of pressure regulating valve>
Next, an operation method of the pressure regulating valve according to the present embodiment will be described with reference to FIG.
As shown in FIG. 1, for example, when the supply of the fuel gas G to the vehicle fuel cell is started and the fuel gas G flows out from the outlet terminal 6 in the direction of the arrow, the pressure regulating chamber 21 of the downstream pressure regulating valve 2. The pressure of the fuel gas G stored inside falls. When the pressure of the fuel gas G in the pressure regulating chamber 21 decreases, the piston 24 rises, and the fuel gas G in the valve chamber 22 passes through the through hole 2411 formed in the piston 24 and the valve body 241. The pressure inside the pressure regulating chamber 21 is increased. When the pressure in the pressure regulating chamber 21 reaches a desired pressure, the piston 24 pushes down the coil spring 25 to bring the lower end portion of the valve body 241 into contact with the valve seat 26, so that the fuel gas G from the valve chamber 22 Supply stops. The pressure in the pressure regulating chamber 21 is set to a desired value (final pressure) by adjusting the screwing amount of the adjusting screw 28 in advance.

  When the pressure of the fuel gas G in the valve chamber 22 decreases, the valve chamber 22 of the downstream pressure regulating valve 2 and the pressure regulating chamber 11 of the upstream pressure regulating valve 1 are communicated with each other by the middle passage 3 (31, 32, 33). Therefore, the fuel gas G stored in the pressure regulating chamber 11 of the upstream pressure regulating valve 1 flows in the direction of the arrow, and the pressure in the valve chamber 22 of the downstream pressure regulating valve 2 is increased. At this time, since the pressure in the pressure regulating chamber 11 of the upstream pressure regulating valve 1 decreases, the urging force of the coil spring 16 that urges the piston 15 moves the valve body 13 of the upstream pressure regulating valve 1 upward.

  At this time, the valve body 13 moves while the sliding members 135a and 135b and the inner peripheral surface of the valve chamber 12 slide, so that the sliding resistance of the valve body 13 is reduced. Moreover, since the sliding members 135a and 135b are disposed at both ends of the main body 134 of the valve body 13, the valve body 13 can be prevented from being inclined. Therefore, the valve body 13 moves (slides) smoothly.

  When the valve body 13 moves upward and is separated from the valve seat 14, the high-pressure fuel gas G supplied from the fuel tank to the inlet terminal 8 passes through the inlet terminal passage 81, the internal passage 136, and the valve chamber 12. It is supplied into the pressure regulating chamber 11. At this time, since the fuel gas G flows through the internal passage 136 formed inside the valve body 13, it is possible to prevent the valve body 13 from being tilted due to a flow rate deviation as in the prior art.

  By supplying the fuel gas G into the pressure regulating chamber 11 in this way, the pressure of the fuel gas G in the pressure regulating chamber 11 is maintained at a predetermined value (intermediate pressure). And since the valve body 13 moves (slides) smoothly without inclining, the pressure regulation characteristic (responsiveness) can be improved. In addition, the flow can be made uniform without the valve body 13 tilting, and the generation of airflow noise (flute sound) can also be suppressed. Furthermore, it is possible to eliminate rubbing sound (sound generated by rubbing metal members) generated when the valve body 13 slides. In addition, the pressure in the pressure regulation chamber 11 is set to a predetermined value (intermediate pressure) by adjusting the screwing amount of the stopper member 18 in advance.

  On the other hand, when the supply of the fuel gas G to the fuel cell is stopped, the pressure of the fuel gas G stored in the pressure regulating chamber 21 of the downstream pressure regulating valve 2 does not decrease. Therefore, there is no escape space for the fuel gas G leaking from the upstream pressure regulating valve 1 to the middle passage 3 (31, 32, 33), and the pressure in the middle passage 3 increases. When the pressure of the fuel gas G in the middle passage 3 becomes a predetermined value or more, the ball valve 43 of the check valve 4 is separated from the inlet portion 42 and the check valve 4 is activated. At this time, the fuel gas G is discharged from the third middle passage 33 into the valve chamber 41 of the check valve 4 via the check valve inlet passage 52. Therefore, with respect to the annular seal member 151 that seals the pressure regulating chamber 11 of the upstream pressure regulating valve 1 facing the middle passage 3 (31, 32, 33) and the annular seal member 243 that seals the valve chamber 22 of the downstream pressure regulating valve 2 The overload of the fuel gas G can be avoided. The fuel gas G released into the valve chamber 41 of the check valve 4 is supplied to the outlet terminal 6 via the pressure regulating chamber 21 and the outlet terminal passage 61 of the downstream pressure regulating valve 2. Therefore, waste due to the release of the fuel gas G to the outside can be reduced.

  As described above in detail, according to the pressure regulating valve 10 according to the present embodiment, since the sliding members 135a and 135b are provided on the valve body 13, the valve body 13 and the valve chamber 12 (inner peripheral surface). And slidability is improved. Further, since the internal passage 136 (136a, 136b) is provided inside the valve body 13, it is possible to prevent the valve body 13 from being inclined due to a flow rate deviation. Furthermore, since the sliding members 135a and 135b are arranged apart from both ends of the valve body 13, it is possible to reliably prevent the valve body 13 from tilting. Accordingly, since the sliding resistance of the valve body 13 is reduced and the valve body 13 does not tilt, the valve body 13 smoothly slides in the valve chamber 12, thereby improving the pressure regulation characteristic (responsiveness). Can do. In addition, the flow can be made uniform without the valve body 13 tilting, and the generation of airflow noise (flute sound) can also be suppressed.

  Subsequently, modifications will be described. However, since the basic configuration of the pressure regulating valve itself is the same, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate. The configuration of the valve body, which is a point, will be mainly described.

<First modification>
The valve body provided in the pressure regulating valve according to the first modification will be described with reference to FIG. FIG. 3 is an enlarged cross section around the valve body and the valve chamber in the first modification.
As shown in FIG. 3, the valve body 13 of the first modification has a branch that communicates the annular space C formed between the sliding member 135a and the sliding member 135b and the first internal passage 136a. A passage 137 is formed. That is, the annular space C communicates with the upstream side (and the downstream side) of the valve chamber 12 via the branch passage 137 and the internal passage 136. The cross-sectional area of the branch passage 137 is set to be equal to or larger than the cross-sectional area of the first internal passage 136a. In the first modification, the branch passage 137 is formed so as to penetrate the main body portion 134 in the horizontal direction (left-right direction), but is not limited to such a shape. For example, in FIG. 3, a branch passage may be formed only on the left side or the right side of the first internal passage 136a.

  In such a first modification, even when a high-pressure fuel gas is suddenly supplied to the pressure regulating valve 10, the current space C and the first internal passage 136a communicate with each other through the branch passage 137. C pressure rises instantaneously. Therefore, it is possible to reliably prevent the pressure increase from being delayed in the annular space C. As a result, it is possible to reliably prevent the differential pressure from acting on the sliding member 135a (135b) and to prevent the sliding member 135a (135b) from being deformed. As a result, even when a high-pressure fuel gas is suddenly supplied to the pressure regulating valve 10, the valve body 13 moves smoothly (slids) without tilting, so that the pressure regulation characteristic (responsiveness) is improved. Can do. In addition, the flow can be made uniform without the valve body 13 tilting, and the generation of airflow noise (flute sound) can also be suppressed.

<Second modification>
Next, the valve body provided in the pressure regulating valve according to the second modification will be described with reference to FIG. FIG. 4 is an enlarged cross section around the valve body and the valve chamber in the second modification.
As shown in FIG. 4, the valve body 13 of the second modified example is provided with a sliding member 135c that is wide in the axial direction. Thereby, in the 2nd modification, annular space C is not formed like the above-mentioned embodiment and the 1st modification.

  Therefore, in the second modification, when high-pressure fuel gas is suddenly supplied to the pressure regulating valve 10, no differential pressure acts on the sliding member 135c, and the sliding member 135c does not deform. . As a result, even when a high-pressure fuel gas is suddenly supplied to the pressure regulating valve 10, the valve body 13 moves smoothly (slids) without tilting, so that the pressure regulation characteristic (responsiveness) is improved. Can do. In addition, the flow can be made uniform without the valve body 13 tilting, and the generation of airflow noise (flute sound) can also be suppressed.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Upstream pressure regulating valve 2 Downstream pressure regulating valve 7 Body member 10 Pressure regulating valve 11 Pressure regulating chamber 12 Valve chamber 13 Valve body 14 Valve seat 15 Piston 133 Valve spring 135a Sliding member 135b Sliding member 135c Sliding member 136 Internal passage 136a First internal passage 136b Second internal passage 137 Branch passage C Annular space G Fuel gas

Claims (3)

A pressure regulating chamber for adjusting the pressure of the fluid, a valve chamber communicating with the inlet and the pressure regulating chamber, a valve body slidably disposed in the valve chamber, and a valve that partitions the valve chamber and the pressure regulating chamber In a pressure regulating valve having a seat member, a biasing member that biases the valve body toward the valve seat member, and a piston disposed at a position facing the valve body across the valve seat member,
The valve body is
A fluid passage formed therein;
A pressure regulating valve comprising: a sliding member disposed at a sliding portion with the valve chamber. The pressure regulating valve according to claim 1,
A plurality of the sliding members are arranged on the valve body. The pressure regulating valve according to claim 2,
The sliding members are respectively arranged on the upstream side and the downstream side of the valve body,
The valve body includes a branch passage that communicates the fluid passage with a space formed between the valve body and the valve chamber by the sliding member between the sliding members. Pressure regulating valve.

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