JPH061753U - Propellant valve - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a propellant valve that is easy to assemble and can withstand long-term use. [Structure] A poppet 31 that can abut against the seat portion 27,
Since both the poppet guide member 29 having the poppet 31 fixed to the one end A side and the guide member 32 externally fitted to the poppet guide member 29 are arranged in the large diameter opening 26 of the casing 24, the propellant When assembling the valve, the poppet 31 and the guide member 32 can be adjusted in advance so that the axes of the poppet 31 and the guide member 32 coincide with each other, so that the poppet 31 can be brought into contact with the seat portion 27 in an optimum state. Further, since the contact area between the large-diameter opening 26 and the guide member 32 is large, the clearance between the large-diameter opening 26 and the guide member 32 hardly increases even when the propellant valve is used for a long period of time. The contact state of the poppet 31 with respect to the seat portion 27 does not change.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a propellant valve.

[0002]

[Prior art]

 FIG. 2 shows an example of a fluid pressure driven propellant valve used in a rocket engine, where 1 has a small diameter opening 2 on one end A side and a large diameter opening 3 on the other end B side. A casing in which a partition wall 4 formed between the small-diameter opening 2 and the large-diameter opening 3 is provided with a through hole 5 penetrating from the bottom of the small-diameter opening 2 to the bottom of the large-diameter opening 3. The casing 1 is provided with a propellant outlet flow path 6 communicating with the inside of the small diameter opening 2 from the outside.

Reference numeral 7 denotes a substantially annular propellant inlet flow path member attached to the end surface of the casing 1 on one end A side, and the inner wall portion of the propellant inlet flow path member 7 has one end A side to the other end B side. A seat portion 8 is formed whose inner diameter gradually decreases toward the front.

Reference numeral 9 denotes a substantially round bar-shaped guide portion 10 in which a longitudinal intermediate portion is slidably inserted into the through hole 5 and the other end B side end portion of the guide portion 10 is provided with the large-diameter opening portion 3. It is a valve element actuating member having a substantially disc-shaped pressure receiving portion 11 capable of closing an end portion.

Reference numeral 12 is a valve element located in the propellant inlet flow path member 7 and attached to one end A side end of the guide portion 10, and 13 is a valve element 12 so that the valve element 12 can abut the seat portion 8. The attached substantially annular poppet, 14 is an auxiliary guide member attached to the surface of the pressure receiving portion 11 opposite to the guide portion 10, and 15 is attached along the edge of the pressure receiving portion 11. A seal material 16 is a seal material provided between the inner peripheral portion of the through hole 5 and the outer peripheral portion of the guide portion 10.

A large-diameter opening 18 formed at one end A side is externally fitted to the pressure-receiving portion 11, and the auxiliary guide 17 is provided in a through-hole 19 penetrating from the other end B-side end face to the bottom of the large-diameter opening 18. A cover member attached to the B-side end portion of the casing 1 so that the member 14 is fitted therein, 20 is a chamber formed by the other end B-side end surface of the pressure receiving portion 11 and a large-diameter opening 18, and 21 is the cover. It is a fluid pressure supply channel that connects the outside of the member 17 and the chamber 20.

Numerals 22 and 23 are spring members arranged in a space formed by the large-diameter openings 3 and 18 and constantly urging the pressure receiving portion 11 toward the side opposite to the casing, and the elasticity of the spring members 22 and 23. The poppet 13 is brought into contact with the seat portion 8 by the force.

In the propellant valve having the above-described configuration, the poppet 13 is normally in contact with the seat portion 8 due to the elastic force of the spring members 22 and 23, so that the valve body 12, the poppet 13, the seat portion 8 and The small-diameter opening 2 and the inside of the propellant inlet channel member 7 are held in a non-communication state, and the propellant (for example, hydrazine N ₂ H ₄ ) flowing into the propellant inlet channel member 7 has a small-diameter opening. It does not flow out of the propellant outlet flow path 6 to the outside of the casing 1 via the portion 2.

On the other hand, when the propellant flowing into the propellant inlet flow channel member 7 flows out from the propellant outlet flow channel 6 to the outside of the casing 1, helium from the fluid pressure supply flow channel 21 to the chamber 20 Inflow compressed gas such as.

When the pressure receiving portion 11 moves toward the casing 1 side against the elastic force of the spring members 22 and 23 due to the pressure of the compressed gas flowing into the chamber 20, the pressure receiving portion 11 and the valve body 12 are guided through the guide portion 10. Moves, the poppet 13 separates from the seat portion 8, and the propellant flowing into the propellant inlet flow path member 7 flows out of the casing 1 from the propellant outlet flow path 6 through the small diameter opening 2.

[0011]

[Problems to be solved by the device]

 When assembling the above-mentioned propellant valve, structurally, the spring members 22 and 23 are arranged in the large-diameter opening 3 of the casing 1, and the guide portion 10 of the valve body operating member 9 is inserted into the through hole 5. Since the propellant inlet channel member 7 is attached to the end surface of the casing 1 on the side of one end A, and the valve body 12 is attached to the tip of the guide portion 10, the contact state of the poppet 13 with respect to the seat portion 8 is , The casing 1, the propellant inlet flow path member 7, the valve body operating member 9, the valve body 12 and the like depend on manufacturing precision and assembly precision.

Therefore, in order to bring the poppet 13 into contact with the seat portion 8 in an optimum state, it is necessary to repeatedly assemble and disassemble the above-mentioned members, so that the propellant valve can be assembled efficiently. I can't.

Further, since the contact area between the through hole 5 and the guide portion 10 and the contact area between the through hole 19 and the auxiliary guide member 14 are relatively small, when the propellant valve is used for a long period of time, the valve body operating member 9 It is conceivable that the clearance between the through hole 5 and the guide portion 10 and the clearance between the through hole 19 and the auxiliary guide member 14 will gradually increase due to the repeated movement of the above.

When the clearance increases, the guide portion 10 and the auxiliary guide member 14 are displaced in the radial direction, and as a result, the poppet 13 does not properly contact the seat portion 8 and compressed gas flows into the chamber 20. Despite the absence of the propellant, the propellant flowing into the propellant inlet channel member 7 flows out of the propellant outlet channel 6 through the small-diameter opening 2 to the outside of the casing 1, and the propellant is suitable for the rocket engine. I'm out of control.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a propellant valve that is easy to assemble and can withstand long-term use.

[0016]

[Means for Solving the Problems]

 In order to achieve the above object, in the propellant valve of the present invention, a small diameter opening is provided at one end A side and a large diameter opening communicating with the small diameter opening is provided at the other end B side. A tubular casing in which a seat portion whose inner diameter gradually decreases toward the small diameter opening is formed on one end A side, a poppet guide member arranged in the large diameter opening, and one end A side of the poppet guide member A poppet fixed to the end portion so as to come into contact with the seat portion; and a substantially tubular guide member externally fitted and locked to the poppet guide member so as to slide along the large-diameter opening portion, A propellant inflow hole communicating from the outside of the casing with a chamber formed by the seat portion, the inner peripheral portion of the casing, the outer peripheral portion of the poppet guide member, and the end portion of the guide member on the one end A side, and the poppet guide member. Toward small diameter opening It comprises an elastic member which always urges the valve element actuating device of the port pair Ttogaido member against the urging force of the elastic body can be moved in a direction away from the small diameter opening Te.

[0017]

[Action]

 In the propellant valve of the present invention, the poppet for closing the seat portion, the poppet guide member to which the poppet is fixed, and the guide member for guiding the poppet guide member are all inside the large diameter opening of the casing. Since it is arranged in the seat, it can be adjusted in advance so that the axial center of the poppet and the guide member may coincide when assembling the propellant valve. Is possible.

Further, since the contact area between the large-diameter opening portion of the casing and the guide member is relatively large, stability and sealing performance when the guide member slides are good, and even if the propellant valve is used for a long period of time. As the guide member is repeatedly moved, the clearance between the large-diameter opening and the guide member hardly increases, and the contact state of the poppet with respect to the seat portion does not change.

[0019]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the propellant valve of the present invention, in which 24 is a large diameter opening 25 communicating with the small diameter opening 25 on one end A side and the other end B side with the small diameter opening 25. A cylindrical casing having a portion 26 and having a seat portion 27 whose inner diameter is gradually reduced toward the small diameter opening portion 25 on one end A side in the large diameter opening portion 26.

Reference numeral 29 denotes a poppet guide member having a hollow structure, which is disposed in the large-diameter opening 26 and has one end A side end closed and the other end B side end open, and 40 has one end A side end described above. The valve body actuating member 55 is inserted into the hollow portion from the opening on the other end B side of the guide member 29 and fixed to the closing portion, and 55 is an intermediate portion of the poppet guide member 29 in the longitudinal direction. And a communication hole 55 formed so as to communicate the outside with the outside.

Reference numeral 30 is a valve body having a substantially conical shape that is tapered toward the small-diameter opening 25, and is fixed to one end A side end of a poppet guide member 29, and 31 is a poppet by the valve body 30. A substantially annular poppet fixed to the end portion of the guide member 29 on one end A side so as to come into contact with the seat portion 27, and 32 of the poppet guide member 29 so as to slide along the large-diameter opening portion 26. The other end B side end is a substantially cylindrical guide member fitted on the outer peripheral surface, 33 is a circumferentially extending projection formed in the middle of the poppet guide member 29, and 34 is one end A side end The retainer member has a substantially cylindrical shape and has a male screw portion on the outer peripheral surface and a flange portion 35 on the other end B side end portion.

The male screw portion of the retainer member 34 is screwed into a female screw portion formed on the inner peripheral portion of the other end B side end portion of the poppet guide member 29, and the guide member 32 and the flange portion 35 and the protrusion. It is constrained by the portion 33 so as not to move in the axial direction with respect to the poppet guide member 29.

The poppet guide member 29, the valve body 30, the poppet 31, the guide member 32, the retainer member 34, and the valve body actuating member 40 are integrally assembled in advance, and the shaft of the poppet 31 and the guide member 32 is assembled. The minds are adjusted to match.

The poppet 31 and the guide member 32 are made of Teflon, which has excellent wear resistance, chemical resistance, and slidability.

Reference numeral 53 is a propellant inflow hole communicating from the outside of the casing 24 with a chamber 54 formed by the seat portion 27, the inner peripheral portion of the casing 24, and the end portion of the guide member 32 on the one end A side, and 28 is a propellant. A propellant inlet flow path member connected to the inflow hole 53. The propellant inflow hole 53 is not blocked by the guide member 32 even if the poppet guide member 29 moves so that the poppet 31 contacts the seat portion 27. It is provided in the position.

Reference numeral 36 is a substantially annular valve element operating device base fixed to a flange portion 37 formed at the other end B side end of the casing 24, and 38 is a substantially annular member fitted in the hollow portion of the valve element operating device base 36. An annular valve element operating member support portion 39 is a substantially annular valve element operating member fitting portion fitted in the hollow portion of the valve element operating member support portion 38, and the other end B side end of the valve element operating member 40. The portion penetrates the hollow portion of the valve body actuating member fitting portion 39 and projects to the other end B side of the valve body actuating member fitting portion 39.

Reference numeral 41 is loosely fitted to the longitudinal intermediate portion of the valve body operating member 40, and one end A side end portion thereof abuts on a projection 42 formed near the one end A side end of the valve body operating member 40 and the other end B thereof. The side end portion is a bellows which is in contact with the end surface on the one end A side of the valve body operating member support portion 38, and 43 is a substantially disc-shaped pressure receiving member fixed to the other end B side end portion of the valve body operating member 40. .

Reference numeral 44 denotes a substantially cylindrical casing having one end A side end fixed to the other end B side end of the valve body actuating device base 36, and 45 a fluid pressure supply communicating from the outside of the casing 44 to the inside. A flow passage, 46 is a substantially annular bellows support portion fixed to the other end B side end portion of the casing 44, 47 is a flange portion 48 near the intermediate portion B side, and one end A side end portion is the casing. A substantially cylindrical spring material support portion in which a flange portion 48 is fixed to the other end B side end surface of the bellows support portion 46 so as to be located in 44, and 49 is a hollow structure fixed in the spring material support portion 47. It is the auxiliary guide member support portion of the.

An auxiliary member 50 has one end A side end fixed to the other end B side end of the valve body actuating member 40 and the other end B side end fitted into the hollow portion of the auxiliary guide member support 49. The guide member 51 is loosely fitted to the intermediate portion of the guide member 50, one end A side end portion thereof abuts the other end B side end surface of the pressure receiving member 43, and the other end B side end portion thereof is the auxiliary guide member. The spring member 52 abutting on the end surface of the support portion 49 on the one end A side is loosely fitted to the portion of the spring material support portion 47 closer to the one end A side than the flange portion 48, and the one end A side end portion is the pressure receiving member. The bellows is in contact with the other end B side end face of the member 43, and the other end B side end face is in contact with the one end A side end face of the bellows support portion 46.

The spring member 51 constantly urges the pressure receiving member 43 toward the casing 24 by the elastic force, and the pressing force acting on the pressure receiving member 43 is mediated by the valve body operating member 40 and the poppet guide member 29. Is transmitted to the poppet 31, and the poppet 31 comes into contact with the sheet portion 27.

When a compressed gas such as helium or air is flown into the fluid pressure supply passage 45, the pressure of the compressed gas flowing into the casing 44 resists the elastic force of the spring member 51 and the pressure receiving member 43. Is pushed in a direction away from the casing 24, and the valve body actuating member 40 and the poppet guide member 29 are integrally moved together with the pressure receiving member 43 so that the poppet 31 and the valve body 30 are separated from the seat portion 27. The valve body operating device base 36, the valve body operating member support portion 38, the valve body operating member fitting portion 39, the valve body operating member 40, the pressure receiving member 43, the casing 44, the bellows supporting portion 46, the flange portion 48, The auxiliary guide member support portion 49 and the like constitute a valve body operating device 56 for opening the poppet 31 against the elastic force of the spring member 51.

The operation of the propellant valve according to this embodiment will be described below.

In the propellant valve having the above-described configuration, the pressure receiving member 43 is normally biased toward the casing 24 by the elastic force of the spring member 51, and the poppet 31 is in contact with the seat portion 27. Therefore, the valve body 30, the poppet 31, and the seat portion 27 hold the small diameter opening portion 25 and the chamber 54 in a non-communication state.

Therefore, even if a propellant (for example, hydrazine N ₂ H ₄ ) flows from the propellant inlet flow path member 28 into the chamber 54 through the propellant inflow hole 53, the propellant will flow from the chamber 54 into a small-diameter opening portion. It does not flow out of the casing 24 via 25.

On the other hand, when the propellant flowing into the chamber 54 from the propellant inlet flow path member 28 is discharged to the outside of the casing 24, compression of helium, air or the like from the fluid pressure supply flow path 45 to the casing 44 is performed. Allow gas to flow in.

The pressure of the compressed gas flowing into the casing 44 presses the pressure receiving member 43 in the direction away from the casing 24 against the elastic force of the spring member 51, and together with the pressure receiving member 43, the valve body operating member 40. The poppet guide member 29 moves integrally, the poppet 31 and the valve body 30 separate from the seat portion 27, and the propellant flowing into the chamber 54 flows out of the casing 24 through the small-diameter opening 25.

Further, when the supply of the compressed gas to the casing 44 is stopped, the elastic force of the spring member 51 urges the pressure receiving member 43 toward the casing 24, and the poppet 31 comes into contact with the seat portion 27, so that the small diameter is reduced. The opening 25 and the chamber 54 are in a non-communication state.

In the propellant valve of the present embodiment, the valve body 30, the poppet 31, the guide member 32, the valve body actuating member 40 and the like are provided with respect to the poppet guide member 29 arranged in the large diameter opening 26. Since they are integrally assembled, the poppet 31 and the guide member 32 can be preliminarily adjusted so that the axes thereof coincide with each other during the operation of assembling the propellant valve.

Therefore, it becomes possible to bring the poppet 31 into contact with the seat portion 27 in an optimum state without repeatedly assembling and disassembling each member constituting the propellant valve. The time required can be significantly reduced.

Further, since the contact area between the large-diameter opening 26 of the casing 24 and the guide member 32 is comparatively large, stability and sealing performance when the guide member 32 slides are good.

Further, in addition to the above-mentioned structure having a large contact area, since the guide member 32 is made of wear-resistant and chemical-resistant Teflon, even if the propellant valve is used for a long period of time, The clearance between the large-diameter opening 26 of the casing 24 and the guide member 32 hardly expands due to repeated movements or the influence of propellant, and the poppet 31 contacts the seat portion 27. The state does not change.

It should be noted that the propellant valve of the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0044]

[Effect of device]

 As described above, the propellant valve of the present invention can exert various excellent effects as described below.

(1) Since the poppet guide member, the poppet, and the guide member are integrally assembled in advance, the axis of the poppet and the guide member can be easily aligned when the propellant valve is assembled. Therefore, it becomes possible to bring the poppet into contact with the seat in an optimal state without repeating the assembly and disassembly of the components that make up the propellant valve, which significantly increases the time required to assemble the propellant valve. You can save money.

(2) Since the contact area between the large-diameter opening of the casing and the guide member is relatively large, stability and sealability when the guide member slides are good, and the propellant valve is used for a long time. Even if it is used, the clearance between the large-diameter opening and the guide member hardly increases due to repeated movement of the guide member, and the contact state of the poppet with the seat does not change.

[Brief description of drawings]

1 is a sectional view showing an embodiment of a propellant valve of the present invention.

FIG. 2 is a sectional view showing an example of a conventional propellant valve.

[Explanation of symbols]

 24 casing 25 small diameter opening 26 large diameter opening 27 seat part 29 poppet guide member 31 poppet 32 guide member 51 spring member (elastic body) 53 propellant inflow hole 54 chamber 56 valve body actuating device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Sakuraya 229 Tonogaya, Mizuho-cho, Nishitama-gun, Tokyo Ishi Kawashima Harima Heavy Industries Ltd. Mizuho factory

Claims (1)

[Scope of utility model registration request] 1. A small-diameter opening is formed on one end A side, and a large-diameter opening is formed on the other end B side so as to communicate with the small-diameter opening, and one end A side in the large-diameter opening is directed toward the small-diameter opening. A tubular casing having a seat portion having a gradually decreasing inner diameter, a poppet guide member disposed in the large-diameter opening, and an end portion of the poppet guide member on the side of one end A can be brought into contact with the seat portion. Fixed to the poppet, a substantially tubular guide member externally fitted and locked to the poppet guide member so as to slide along the large-diameter opening, the seat portion, the inner peripheral portion of the casing, and the poppet. A propellant inflow hole communicating from the outside of the casing with a chamber formed by the outer peripheral portion of the guide member and the end portion on the one end A side of the guide member, and an elastic body that constantly urges the poppet guide member toward the small diameter opening. When,
A propellant valve, comprising: a valve element actuating device capable of moving the poppet guide member in a direction away from the small-diameter opening portion against the biasing force of the elastic body.