CN211117952U - Piston guide structure of wind tunnel cut-off valve - Google Patents
Piston guide structure of wind tunnel cut-off valve Download PDFInfo
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- CN211117952U CN211117952U CN201921139884.3U CN201921139884U CN211117952U CN 211117952 U CN211117952 U CN 211117952U CN 201921139884 U CN201921139884 U CN 201921139884U CN 211117952 U CN211117952 U CN 211117952U
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Abstract
The utility model belongs to the field of industrial valves, in particular to a piston guide structure of a wind tunnel cut-off valve, which comprises a shell, wherein the shell is a hollow cylindrical part, the side wall of the shell is provided with four holes, the positions of the two holes correspond, the connecting line of the two holes runs through the radial direction of the shell, the two holes are respectively marked as a hole a and a hole b, the other two holes are respectively arranged at the two sides of the connecting line, the connecting line of the hole and the circle center of the shell forms a certain angle α with the vertical direction of the connecting line running through the circle center, the two holes are respectively marked as a hole c and a hole d, a piston is arranged in the cavity of the shell, the piston is arranged in the two holes of the connecting line running through the radial direction of the shell, and the rear end of the piston is fixedly connected with the piston rod.
Description
Technical Field
The utility model belongs to the industrial valve field, concretely relates to piston guide structure of wind-tunnel trip valve.
Background
The wind tunnel cut-off valve is used in a large-caliber hypersonic-velocity high-pressure air inlet pressure regulating system of a spacecraft, and mainly has the functions of quickly communicating or closing high-pressure main airflow and improving the safety performance of a wind tunnel. In the wind tunnel test process, in order to meet the measurement accuracy of the test aircraft model, the requirements of high inflow pressure, high speed and small pressure fluctuation change are met, so that the accuracy of test data is ensured. Due to harsh working conditions and heavy weight of the piston, the phenomena of piston rod galling and valve jamming are generated when the valve is used. Aiming at the problem, a piston guide structure of the wind tunnel cut-off valve is designed, and the problems of piston rod galling and valve blocking are solved.
Novel content
The utility model aims to design a piston guide structure of a wind tunnel cut-off valve, which is used in a large-caliber hypersonic-velocity high-pressure air inlet pressure regulating system in a navigation. The normal use of the valve is ensured, and the phenomena of piston rod galling and valve blockage caused by working conditions and piston problems are avoided, so that the whole device stops working and economic loss is caused.
The novel piston guide structure of the wind tunnel cut-off valve is realized in a way that the piston guide structure comprises a shell, a guide sleeve, an O-shaped ring, a piston, a sleeve ring and a piston rod, wherein the shell is a hollow cylindrical part, four holes are formed in the side wall of the shell, the positions of the two holes correspond to each other, the connecting line of the two holes penetrates through the radial direction of the shell, the two holes are respectively marked as a hole a and a hole b, the other two holes are respectively arranged on the two sides of the connecting line, a certain angle α is formed between the connecting line of the hole and the circle center of the shell and the vertical direction of the connecting line of the circle center, the two holes are respectively marked as a hole c and a hole d, a piston is arranged in a cavity of the shell, the piston is arranged in the two holes (namely the hole a and the hole b) which are formed by the connecting line in the radial direction of the shell, the rear end of the piston is fixedly connected with the piston rod, and when the piston is driven by the piston rod to move forwards and backwards and forwards, the hole and backwards.
According to the piston guide structure of the wind tunnel cut-off valve, the lantern ring is arranged in the cavity of the shell and arranged at the rear part of the shell, the piston rod penetrates through the lantern ring and extends out of the hole b, the outer side wall of the lantern ring is in sealing connection with the inner side wall of the shell, and the piston rod is also in sealing connection with the lantern ring.
According to the piston guide structure of the wind tunnel cut-off valve, the guide sleeve is arranged in the cavity of the shell and is tightly attached to the inner side wall of the shell and coaxially arranged with the piston, and through holes are formed in the positions, corresponding to the holes c and the holes d, on the guide sleeve so as to facilitate fluid circulation.
According to the piston guide structure of the wind tunnel cut-off valve, the O-shaped ring is arranged between the guide sleeve and the shell, and the sealing performance is further improved.
According to the piston guide structure of the wind tunnel cut-off valve, the guide sleeve guides the whole opening and closing process of the piston, and the piston rod is prevented from galling and deforming when the piston rod and the lantern ring move in a matched mode due to the fact that the piston is too heavy.
According to the piston guide structure of the wind tunnel cut-off valve, the guide sleeve and the lantern ring are welded and fixed.
According to the piston guide structure of the wind tunnel cut-off valve, the piston is provided with the guide surface, and the hard alloy is deposited on the guide surface, so that the wear resistance between the piston and the guide sleeve is enhanced.
The piston guide structure of the wind tunnel shut-off valve is characterized in that the angle α ranges from 10 degrees to 30 degrees.
This neotype effect is: this application can guarantee, during the aerospace heavy-calibre hypersonic high pressure regulating system that admits air, the wind-tunnel trip valve can communicate fast or close high-pressure main air current, improves the security performance of wind-tunnel, can not cause piston rod galling, valve card to hinder the phenomenon because of operating condition and piston problem, leads to whole device to shut down, causes economic loss.
Drawings
Fig. 1 is a schematic view of a piston guide structure of a wind tunnel cut-off valve provided by the present invention;
FIG. 2 is a schematic view of the structure of the guide sleeve provided by the present invention;
fig. 3 is a top view of fig. 2.
In the figure: 1. the piston comprises a shell, 2 parts of a guide sleeve, 3 parts of an O-shaped ring, 4 parts of a piston, 5 parts of a lantern ring and 6 parts of a piston rod.
Detailed Description
A piston guide structure of a wind tunnel cut-off valve comprises a shell 1, a guide sleeve 2, an O-shaped ring 3, a piston 4, a lantern ring 5 and a piston rod 6, wherein the shell 1 is a hollow cylindrical part, four holes are formed in the side wall of the shell 1, the positions of the two holes correspond to each other, the connecting line of the two holes penetrates through the radial direction of the shell 1, the two holes are respectively marked as a hole a and a hole b, the other two holes are respectively arranged on the two sides of the connecting line, a certain angle α is formed between the connecting line of the hole and the circle center of the shell 1 and the vertical direction of the connecting line of the circle center, the two holes are respectively marked as a hole c and a hole d, the piston 4 is arranged in a cavity of the shell 1, the piston 4 is arranged in the connecting line penetrating through the radial direction of the shell 1 (namely in the hole a and the hole b), the rear end of the piston 4 is fixedly connected with the piston rod 6, and when the piston 4 is driven by the piston rod 6 to move forwards and backwards, the piston 4 and backwards, the closed or opened states of the hole a and the hole.
A lantern ring 5 is arranged in the cavity of the shell 1, the lantern ring 5 is arranged at the rear part of the shell 1, the piston rod 6 penetrates through the lantern ring 5 and extends out of the hole b, the outer side wall of the lantern ring 5 is connected with the inner side wall of the shell 1 in a sealing mode, and the piston rod 6 is connected with the lantern ring 5 in a sealing mode.
A guide sleeve 2 is arranged in a cavity of the shell 1, the guide sleeve 2 is tightly attached to the inner side wall of the shell 1 and is coaxially arranged with the piston 4, and through holes are formed in the positions, corresponding to the holes c and the holes d, of the guide sleeve 2, so that fluid can flow through the through holes.
An O-shaped ring 3 is arranged between the guide sleeve 2 and the shell 1, so that the sealing performance is further improved.
The guide sleeve 2 guides the piston 4 in the whole opening and closing process, and prevents the piston rod 6 from galling and deforming when the piston rod 6 and the lantern ring 5 move in a matched mode due to the fact that the piston 4 is too heavy.
The guide sleeve 2 and the lantern ring 5 are fixed by welding.
The piston 4 is provided with a guide surface, and hard alloy is welded on the guide surface to enhance the wear resistance between the piston 4 and the guide sleeve 2.
The angle α is in the range of 10-30 degrees.
The functions of each part are explained as follows:
1. the guide sleeve 2 guides the piston 4 in the whole opening and closing process, and prevents the piston rod 6 from galling and deforming when the piston rod 6 and the lantern ring 5 move in a matched mode due to the fact that the piston 4 is too heavy.
2. The guide sleeve 2 and the lantern ring 5 are welded and fixed, and the guide sleeve 2 is prevented from rotating under the action of medium airflow.
3. In order to prevent the existence of the guide sleeve 2 and block the circulation capacity of the shell 1, the guide sleeve 2 is provided with a circular window opposite to the flow passage, and the necessary circulation capacity is ensured.
4. The O-shaped ring 3 seals the gap between the guide sleeve 2 and the shell 1, and prevents the guide failure caused by the scouring of medium airflow.
5. The piston 4 is provided with a guide surface, and hard alloy is welded on the guide surface to enhance the wear resistance between the piston 4 and the guide sleeve 2.
Claims (8)
1. A piston guide structure of a wind tunnel cut-off valve is characterized by comprising a shell (1), a guide sleeve (2), an O-shaped ring (3), a piston (4), a lantern ring (5) and a piston rod (6), wherein the shell (1) is a hollow cylindrical part, four holes are formed in the side wall of the shell (1), the positions of the two holes correspond to each other, the connecting line of the two holes penetrates through the radial direction of the shell (1), the two holes are respectively marked as a hole a and a hole b, the other two holes are respectively arranged on the two sides of the connecting line, a certain angle α is formed between the connecting line of the hole and the circle center of the shell (1) and the vertical direction of the connecting line of the circle center, the two holes are respectively marked as a hole c and a hole d, the piston (4) is arranged in a cavity of the shell (1), the piston (4) is arranged in the two holes, which are formed by the connecting line penetrating through the shell (1), the rear end of the piston (4) is fixedly connected with the piston rod (6), and when the piston (4) is driven by the piston rod (6) to move forwards and backwards, the piston (4) and backwards, namely, the hole a hole is not communicated with the hole and the hole (d) in a closed state or in a.
2. The piston guide structure of the wind tunnel shut-off valve according to claim 1, characterized in that: a lantern ring (5) is arranged in a cavity of the shell (1), the lantern ring (5) is arranged at the rear part of the shell (1), the piston rod (6) penetrates through the lantern ring (5) and extends out of the hole b, the outer side wall of the lantern ring (5) is in sealing connection with the inner side wall of the shell (1), and the piston rod (6) is also in sealing connection with the lantern ring (5).
3. The piston guide structure of the wind tunnel shut-off valve according to claim 2, characterized in that: set up uide bushing (2) in the cavity of casing (1), uide bushing (2) hug closely casing (1) inside wall and set up, arrange with piston (4) coaxial, and the position that corresponds with hole c and hole d is opened on uide bushing (2) has the through-hole to the fluid circulation.
4. A piston guide structure of a wind tunnel shut-off valve according to claim 3, characterized in that: an O-shaped ring (3) is arranged between the guide sleeve (2) and the shell (1), so that the sealing performance is further improved.
5. The piston guide structure of the wind tunnel shut-off valve according to claim 4, characterized in that: the guide sleeve (2) guides the piston (4) in the whole opening and closing process, and prevents the piston rod (6) from galling and deforming when the piston rod (6) and the lantern ring (5) move in a matched mode due to the fact that the piston (4) is too heavy.
6. The piston guide structure of the wind tunnel shut-off valve according to claim 5, characterized in that: the guide sleeve (2) and the lantern ring (5) are fixed by welding.
7. The piston guide structure of the wind tunnel shut-off valve according to claim 6, characterized in that: the piston (4) is provided with a guide surface, and hard alloy is welded on the guide surface to enhance the wear resistance between the piston (4) and the guide sleeve (2).
8. The piston guide structure of the wind tunnel cut-off valve as claimed in claim 7, wherein the range of the angle α is 10-30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921139884.3U CN211117952U (en) | 2019-07-19 | 2019-07-19 | Piston guide structure of wind tunnel cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921139884.3U CN211117952U (en) | 2019-07-19 | 2019-07-19 | Piston guide structure of wind tunnel cut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211117952U true CN211117952U (en) | 2020-07-28 |
Family
ID=71722863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921139884.3U Active CN211117952U (en) | 2019-07-19 | 2019-07-19 | Piston guide structure of wind tunnel cut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211117952U (en) |
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2019
- 2019-07-19 CN CN201921139884.3U patent/CN211117952U/en active Active
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