JP4616436B2 - Fluid injection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fluid injecting apparatus that is installed in a flying body such as a rocket and an interface unit of ground equipment, and is used for injecting and discharging fluids such as a body propellant.
[0002]
[Prior art]
Quick disconnector (hereinafter abbreviated as QD), which is a rocket propulsion system umbilical component, is a device that is attached to the rocket engine body and the interface part of the ground equipment, and is used for injecting and discharging the aircraft propellant. The airframe side and the ground equipment side of the QD are separated and separated when the rocket is launched.
[0003]
This QD is a pressing type QD with bellows, and its basic structure is a nipple part (male side) having a spherical seat at the tip of the bellows on the ground equipment side, and a socket (female side) on the rocket body side, respectively. It has become the composition. The nipple portion and the socket are pressed against each other and fitted to absorb misalignment between the ground equipment and the rocket.
[0004]
Usually, in such a rocket, the allowable value of the misalignment is set to be within 2 ° of bending and within 1.5 mm of offset.
[0005]
3 to 4 show an example of the prior art of such a QD, FIG. 3 is a longitudinal sectional view, and FIG. 4 is a configuration diagram for explaining the operation.
3 to 4, a nipple device 300 (male side) is disposed on the ground facility side, and a socket device 400 (female side) is disposed on the machine body side. Reference numeral 301 denotes a bellows provided in the nipple device 300. When the bellows 301 extends in the direction of the socket device 400 parallel to the shaft center 310, the spherical contact surface of the nipple portion 302 (male side) of the nipple device 300 is shown. 302A contacts the contact surface 401A of the socket part 401 of the socket device 400 (female side) on the machine body side.
In the above QD, as shown in FIG. 4, the shaft center 310 of the nipple device 300 and the shaft center 410 of the socket device 400 are arranged with a misalignment angle α2 and an offset value L2 within a certain angle. Yes.
[0006]
[Problems to be solved by the invention]
In such QD, after the nipple device 300 and the socket device 400 abut, the nipple portion 302 slides along the Teflon seal angle θ2 as shown in FIG. Slide and move in the direction of the axis 410.
In this case, the spherical contact surface 302A side 301A on the bellows 301 side extends in the arrow Y2 direction with respect to the axis 310 of the nipple device 300, and the side 301B opposite to the spherical contact surface 302A contracts in the arrow Z2 direction. That is, the spherical contact surface 302A side 301A of the bellows 301 extends relative to the opposite side 301B.
[0007]
The nipple part 302 is slid and moved in the direction of the arrow X2 in FIG. 4 as it is, and the nipple part 302 is moved away from the socket part 401, and the occurrence of poor coupling is observed.
[0008]
Therefore, in order to solve the problem due to such poor coupling, conventionally, various tolerances of related facilities and members are set to be stricter, thereby making the required value of misalignment more strict (for example, bending 0.5 °, The method of eliminating the QD coupling failure as described above is adopted. However, improving various tolerances so as to reduce the maximum allowable misalignment value as in this method has a problem that an increase in cost is unavoidable.
[0009]
In view of the problems of the prior art, the present invention relaxes the maximum permissible values of various tolerances of related equipment and members by increasing the maximum permissible value of misalignment between the ground equipment and the rocket body by a simple method. An object is to provide a quick disconnector (QD) capable of reducing the cost of the entire system.
[0010]
[Means for Solving the Problems]
In order to solve this problem, the present invention provides a connector comprising a fluid injection portion attached to a main body so as to be expandable and contractable in an axial direction via a bellows and bendable within a predetermined range. If, e Bei a receiving device for receiving the fluid passing through the connector,
The receiving device includes a nipple portion having a convex spherical surface at the tip,
The connector is configured as a socket having an annular seat surface formed of a Teflon (registered trademark) seal having a seal angle of θ1 so that the fluid injection portion of the connector can come into contact with the convex spherical surface of the nipple portion. a nipple portion and the socket of the fitting process in the fluid injection device ing is,
After the socket shaft center and the nipple shaft center are initially in contact with the sheet surface of the socket and the convex spherical surface of the nipple portion with a misalignment angle α1 within a certain angle and an offset value L1, the socket is Slide the nipple portion along the outer circumference of the nipple portion along the Teflon seal angle θ1, so that the initial contact surface side and the opposite side of the bellows are parallel to the axis of the nipple portion, respectively. When the bellows is deformed and moved, the other end side of the socket is also contact-coupled to the spherical surface on the other end side of the nipple portion so that the socket and the nipple portion are normally fitted. The fitting method of the nipple part and the socket in the fluid injection device characterized by the above is proposed.
[0011]
The invention according to claim 2 is the fluid injecting device used in the method for fitting the nipple portion and the socket according to claim 1,
The Teflon seal angle θ1 of the initial contact surface between the socket seat surface and the convex spherical surface of the nipple portion is an angle at which the initial contact surface moves in the outer peripheral direction of the nipple portion even with the misalignment angle α1 as described above. Set to.
[0012]
The invention according to claim 3 is the one in which the invention according to claim 1 is applied to a fluid injecting device between a flying body and ground equipment, and can be expanded and contracted in the axial direction via a bellows. and fitted with a connector having a fluid injection portion attached bendable within a predetermined range in ground facilities, Ri a receiving device for receiving the fluid passing through the connector name by attaching to the body of the projectile rocket like ,
The receiving device includes a nipple portion having a convex spherical surface at the tip,
The connector is configured as a socket having an annular seat surface formed of a Teflon (registered trademark) seal having a seal angle of θ1 so that the fluid injection portion of the connector can come into contact with the convex spherical surface of the nipple portion. a nipple portion and the socket of the fitting process in the fluid injection device ing is,
After the socket shaft center and the nipple shaft center are initially in contact with the sheet surface of the socket and the convex spherical surface of the nipple portion with a misalignment angle α1 within a certain angle and an offset value L1, the socket is Slide the nipple portion along the outer circumference of the nipple portion along the Teflon seal angle θ1, so that the initial contact surface side and the opposite side of the bellows are parallel to the axis of the nipple portion, respectively. When the bellows is deformed and moved, the other end side of the socket is also contact-coupled to the spherical surface on the other end side of the nipple portion, thereby normally fitting the socket and the nipple portion. The fitting method of the nipple part and socket in the fluid injection apparatus characterized by these.
[0013]
Furthermore the invention of claim 4, wherein, in the fluid injection apparatus used in claim 3 nipple portion and the socket of the fitting method described,
The Teflon seal angle θ1 of the initial contact surface between the socket seat surface and the convex spherical surface of the nipple portion is an angle at which the initial contact surface moves in the outer peripheral direction of the nipple portion even with the misalignment angle α1 as described above. It is characterized by being set to.
[0014]
According to the invention, the connector is moved so that the annular sheet surface of the socket at the tip is brought into contact with the convex spherical surface of the nipple portion of the receiving device. When the socket moves further in the direction of the nipple part due to the expansion of the bellows, the nipple part is formed into a convex spherical surface, so that the sheet surface of the socket seals the convex spherical surface with a Teflon seal. The bellows is deformed along the corner and the bellows is deformed so that the socket axis is concentric with the axis of the nipple part. The socket sheet surface and the entire convex spherical surface of the nipple part are properly fitted. Is done.
[0015]
Therefore, according to this invention, as compared with the conventional fluid injection device, it is possible to obtain a centering effect that allows a larger misalignment between the ground equipment and the fuselage, and thereby various related equipment and members. The tolerance can be relaxed, and as a result, the cost of the entire flying object system can be reduced.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative positions, and the like of the component parts described in this embodiment are not intended to limit the scope of the present invention only to specific descriptions unless otherwise specified. It is just an example.
[0017]
FIG. 1 is a longitudinal sectional view of a quick disconnector (QD) according to an embodiment of the present invention, and FIG.
1-2, 100 is a socket apparatus provided in the ground equipment. 103 is a main body of the socket device 100, and 102 is a socket. A bellows 101 is interposed between the socket 102 and the main body 103, and the socket 102 is bent and deformed within a certain range with respect to the main body 103. Can be extended and retracted.
[0018]
Reference numeral 200 denotes a nipple device provided in the rocket body. Reference numeral 201 denotes a nipple portion provided at the tip of the nipple device 200, and the tip is formed on a convex spherical surface 201A.
Further, an annular sheet surface 102A is formed on the socket 102 with a taper as shown in FIG. 1 so that the convex spherical surface 201A of the nipple portion 201 abuts (or more than the convex spherical surface 201A). A concave spherical surface with a large curvature radius may be used). The seat surface 102A is preferably made of Teflon, for example, a Teflon seal.
[0019]
The operation of the QD will be described with reference to FIG. 2. The bellows 101 extends in the direction of the nipple device 200 along the axial center 100 </ b> A of the socket device 100, so that the socket 102 (female side) of the socket device 100. The sheet surface 102A, which is the initial contact surface, contacts the initial contact surface 203A of the convex spherical surface 201A of the nipple portion 201 (male side) of the nipple device 200 on the machine body side. Here, the shaft center 100A of the socket device 100 and the shaft center 210 of the nipple device 200 are arranged with a misalignment angle α1 within a certain angle and an offset value L1.
[0020]
However, after the contact of the sheet surface 102A of the socket 102 with the convex spherical surface 201A of the nipple portion 201, the socket 102 slides along the Teflon seal angle θ1 of the nipple portion 201 as shown by the arrow X1 direction in FIG. The nipple portion 201 slides in the outer peripheral direction. In that case, the side 101A of the initial contact surface 203A and the opposite side 101B of the bellows 101 are deformed and moved in the directions of arrows Y1 and Z1 so as to be parallel to the axis 210 of the nipple part 201, respectively. As the bellows 101 is deformed and moved, the other end side 102B of the socket 102 is contact-coupled to the spherical surface 201A on the other end side of the nipple part 201, whereby the socket 102 and the nipple part 201 are normally fitted. .
[0021]
That is, according to this embodiment, in the socket device 100 on the ground equipment side that is arranged at the misalignment angle α1 and the offset value L1 with respect to the nipple device 200 on the airframe side, the socket 102 of the socket device 100 The sheet surface 102A, which is the initial contact surface, slides and moves along the convex spherical surface extending in the outer circumferential direction from the apex of the convex spherical surface 201A of the nipple portion 201 (downward in FIG. 2), and at the same time the initial offset As the other end 102B of the socket which has been separated by the value L1 is forcibly pulled toward the spherical surface 201A on the other end side of the nipple portion 201 as the bellows 101 is pressed, a normal fitting between the socket device 100 and the nipple device 200 is achieved. Is possible.
[0022]
Therefore, according to such an embodiment, the sheet surface 102A, which is the initial contact surface of the socket 102, moves in the outer peripheral direction (downward in FIG. 2) along the spherical surface 201A of the nipple portion 201. While the initial contact surface moves in the direction of the central axis, the other contact surface is not separated and the fitting failure is unlikely to occur. In this case, if the Teflon seal angle θ1 of the initial contact surface is set to such an angle that the initial contact surface moves in the outer peripheral direction of the nipple portion 201 even if the misalignment angle α1 is as described above, The contact surface is also forcibly brought into contact with the nipple portion 201.
[0023]
According to the embodiment as described above, since the alignment function is provided on the socket device 100 side arranged on the ground facility side, a misalignment angle α1 larger than the conventional QD can be allowed. . According to the results of experiments by the inventors, the misalignment angle α is 0.5 ° and the offset value L is ± 1.5 mm in the conventional QD, whereas the misalignment angle α is 3 ° in the QD according to the present invention. When the offset value L is 1.5 mm, the socket 102 and the nipple portion 201 are sufficiently fluid-tightly fitted, and the gas leakage value from the QD is also less than the target value. Yes. That is, according to the QD according to the present invention, it was confirmed that the misalignment allowable value at the time of coupling is about 6 times that of the conventional QD at the bending angle.
[0024]
The present invention is not limited to the quick disconnector (QD) according to the above-described embodiment, but can be applied to all fluid injection devices that combine a nipple portion and a socket.
[0025]
【The invention's effect】
As described above, according to the present invention, even if the misalignment between the shaft center of the socket of the connector and the shaft center of the nipple portion of the receiving device is larger than the conventional misalignment, the socket and nipple portion are not aligned. Sufficient fitting is possible without fluid leakage between them.
That is, according to the present invention, the allowable value of misalignment can be widened, whereby manufacturing tolerances such as a mounting portion of the fluid injection device can be relaxed, and the cost of the device can be reduced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a quick disconnector according to an embodiment of the present invention.
FIG. 2 is an operation explanatory diagram in the embodiment.
FIG. 3 is a longitudinal sectional view of a quick disconnector according to the prior art.
FIG. 4 is a diagram for explaining the operation in the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 100 Socket apparatus 101 Bellows 102 Socket 102A Sheet surface 103 Main body 200 Nipple apparatus 201 Nipple part 201A Convex spherical surface

Claims (4)

The body, the expandable and contractible in the axial direction through the bellows, and bent at a predetermined range - Introduction Preparations and connector having a fluid injecting section which is attachable to, and a receiving device for receiving the fluid passing through the connector,
The receiving device includes a nipple portion having a convex spherical surface at the tip,
The connector is configured as a socket having an annular seat surface formed of a Teflon (registered trademark) seal having a seal angle of θ1 so that the fluid injection portion of the connector can come into contact with the convex spherical surface of the nipple portion. a nipple portion and the socket of the fitting process in the fluid injection device ing is,
After the socket shaft center and the nipple shaft center are initially in contact with the sheet surface of the socket and the convex spherical surface of the nipple portion with a misalignment angle α1 within a certain angle and an offset value L1, the socket is Slide the nipple portion along the outer circumference of the nipple portion along the Teflon seal angle θ1, so that the initial contact surface side and the opposite side of the bellows are parallel to the axis of the nipple portion, respectively. When the bellows is deformed and moved, the other end side of the socket is also contact-coupled to the spherical surface on the other end side of the nipple portion so that the socket and the nipple portion are normally fitted. A method for fitting a nipple portion and a socket in a fluid injection device characterized by the above. In the fluid injection device used for the fitting method of the nipple part and socket according to claim 1,
Angle such that the Teflon seal angle θ1 of the initial contact surface between the convex spherical surface of the seat surface and the nipple portion of the socket initially contact surface even if there is misalignment angle α1 as described above is moved in the outer circumferential direction of the nipple portion A fluid injection device characterized by being set to. A receiving device for mounting a connector having a fluid injecting portion attached to a main body to be able to expand and contract in the axial direction via a bellows and bendable within a predetermined range to a ground facility, and to receive fluid passing through the connector Ri name was attached to the fuselage of the flying body of the rocket, etc.,
The receiving device includes a nipple portion having a convex spherical surface at the tip,
The connector is configured as a socket having an annular seat surface formed of a Teflon (registered trademark) seal having a seal angle of θ1 so that the fluid injection portion of the connector can come into contact with the convex spherical surface of the nipple portion. a nipple portion and the socket of the fitting process in the fluid injection device ing is,
After the socket shaft center and the nipple shaft center are initially in contact with the sheet surface of the socket and the convex spherical surface of the nipple portion with a misalignment angle α1 within a certain angle and an offset value L1, the socket is Slide the nipple portion along the outer circumference of the nipple portion along the Teflon seal angle θ1, so that the initial contact surface side and the opposite side of the bellows are parallel to the axis of the nipple portion, respectively. When the bellows is deformed and moved, the other end side of the socket is also contact-coupled to the spherical surface on the other end side of the nipple portion, thereby normally fitting the socket and the nipple portion. A method for fitting a nipple portion and a socket in a fluid injection device characterized by the above. In the fluid injection device used for the fitting method of the nipple part and socket according to claim 3,
The Teflon seal angle θ1 of the initial contact surface between the socket seat surface and the convex spherical surface of the nipple portion is an angle at which the initial contact surface moves in the outer peripheral direction of the nipple portion even with the misalignment angle α1 as described above. setting the flow body injection device.

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