A hydraulic-pneumatic valve-controlled reciprocating machine

Abstract

This invention provides a hydraulic-pneumatic valve-controlled recoil mechanism, relating to the field of recoil mechanism technology. The invention includes a recoil mechanism body positioned above the gun barrel. The recoil mechanism body includes a recoil outer cylinder, an inner cylinder piston slidably disposed within the recoil outer cylinder, an inner cylinder slidably disposed within the recoil outer cylinder with its inner end connected to the inner cylinder piston, a one-way valve located at the end of the inner cylinder near the inner cylinder piston, a fluid outlet located on the one-way valve, a recoil piston slidably disposed within the inner cylinder, a recoil rod slidably disposed within the inner cylinder with its inner end connected to the recoil piston, a connecting pin plate on the recoil outer cylinder for connection to the gun barrel, and a recoil rod fixed to the front end of the gun barrel cradle. The portion between the recoil outer cylinder, the inner cylinder piston, and the inner cylinder forms a first sealed cavity, containing liquid in the first sealed cavity and the inner cylinder between the inner cylinder piston and the recoil piston. The portion between the recoil piston and the inner cylinder forms a second sealed cavity containing gas. This invention is lightweight and provides stable two-stage relative motion recoil.

Description

Technical Field

[0001] This invention relates to the field of recoil mechanism technology, and more specifically to a hydraulic-pneumatic valve-controlled recoil mechanism. Background Technology

[0002] The recoil mechanism is a device that overcomes the influence of the gun's gravity when the firing angle is greater than zero degrees, ensuring the gun does not slide down, and provides energy for the recoil mechanism to automatically return to its pre-firing position after firing. Based on the different elastic media, recoil mechanisms can be divided into spring-type and hydropneumatic-type, among which: The spring-loaded recoil mechanism consists of a helical spring fitted around the gun barrel, providing recoil energy. It is simple in structure, reliable in operation, unaffected by temperature, adaptable, and easy to maintain. However, its drawback is its relatively large weight, limiting its use to small and medium caliber artillery.

[0003] A single-stage hydro-gas recoiling machine uses gas as the energy storage medium and liquid to seal the gas and transmit pressure. It has a compact structure and light weight, but its performance is greatly affected by temperature and its recoiling stability is poor. Summary of the Invention

[0004] The purpose of this invention is to develop a lightweight, stable, hydraulic-pneumatic valve-controlled recoil mechanism that achieves two-stage relative motion through a recoil rod, inner cylinder, and outer recoil cylinder.

[0005] This invention is achieved through the following technical solution: A hydropneumatic valve-controlled recoil mechanism includes a recoil mechanism body disposed above the gun barrel, wherein the recoil mechanism body comprises: Re-entry outer cylinder; The inner cylinder piston is slidably located inside the outer recoil cylinder; The inner cylinder is slidably disposed inside the recoil outer cylinder and its inner end is connected to the inner cylinder piston; A one-way valve is located at the end of the inner cylinder near the piston of the inner cylinder; The flow hole is located on the one-way valve; The reciprocating piston is slidably positioned within the inner cylinder; The return rod is slidably disposed in the inner cylinder and its inner end is connected to the return piston; The recoil outer cylinder is provided with a connecting pin plate that is connected to the gun body. The recoil rod is fixed to the front end of the gun body cradle. The portion between the recoil outer cylinder, the inner cylinder piston, and the inner cylinder is a first sealed cavity. Liquid is provided in the first sealed cavity and the inner cylinder between the inner cylinder piston and the recoil piston. The portion between the recoil piston and the inner cylinder is a second sealed cavity and gas is provided in the second sealed cavity.

[0006] Optionally, the inner cylinder piston is provided with a one-way valve seat, and the one-way valve is provided on the one-way valve seat. The one-way valve opens under pressure difference, allowing the liquid in the first sealed cavity to flow into the inner cylinder between the inner cylinder piston and the reciprocating piston.

[0007] Optionally, a first sealing element is provided between the outer cylinder and the inner cylinder, and the inner cylinder slides and seals with the first sealing element.

[0008] Optionally, the outer reciprocating cylinder is provided with an injection port that communicates with the first sealed cavity.

[0009] Optionally, a second sealing element is provided between the inner cylinder and the return rod, and the return rod and the second sealing element are slidably sealed.

[0010] Optionally, the outer end of the recoil rod is connected to a connector, which is fixed to the front end of the gun barrel cradle.

[0011] Optionally, the recoil rod has an internal cavity, the recoil piston has a through hole communicating with the internal cavity of the recoil rod and the second sealing cavity, the connector has an internal cavity communicating with the internal cavity of the recoil rod, and the connector has an air injection valve.

[0012] Optionally, the connector is externally connected to a sealed air chamber, which is fixed to the front end of the gun barrel cradle. The connector is provided with a through hole communicating with its internal cavity and the air chamber.

[0013] Optionally, the reciprocating piston is provided with a liquid-gas separation groove, and the reciprocating rod is provided with a connecting pipe that communicates with the atmosphere, and the connecting pipe is connected to the liquid-gas separation groove.

[0014] Optionally, the outer diameter of the connecting pipe is smaller than the inner diameter of the cavity inside the recoil rod, the end of the connecting pipe extends out of the recoil rod and passes through the cavity inside the connector to connect to the end of the connector, and the connector is provided with a threaded plug to seal the connecting pipe at the corresponding position.

[0015] The beneficial effects of this invention are: This invention features a compact structure and light weight. It achieves two-stage relative motion through the recoil rod, inner cylinder, and outer recoil cylinder. Compared to traditional single-stage recoil mechanisms, this allows for a shorter recoil length even with long recoil, resulting in a more compact structure and relatively lighter weight. The invention is reliable and provides stable recoil. A one-way valve at the rear of the inner cylinder closes when the recoil speed is too high, increasing hydraulic resistance and reducing the recoil speed, further improving the recoil stability of the artillery. A connecting pipe installed inside the recoil rod connects the recoil piston's liquid-gas separation groove to the atmosphere, preventing gas-liquid mixing. The recoil rod's connection to the inner cylinder creates a gas space to provide recoil energy, enabling the gun barrel to maintain its ready-to-fire position and automatically return to its original position after firing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of the present invention; Figure 2 for Figure 1 Side view; Figure 3 This is a diagram of the internal structure of the reciprocating engine.

[0018] Reference numerals in the attached drawings: 1. Recoiler body; 2. Connecting pin plate; 3. Recoiler outer cylinder; 4. Inner cylinder; 5. Inner cylinder piston; 6. Recoiler rod; 7. Recoiler piston; 8. One-way valve seat; 9. One-way valve; 10. Connecting pipe; 11. Air chamber; 12. Connector; 13. Air injection valve; 14. Liquid injection port; 15. Second sealing cavity; 16. First sealing cavity. Detailed Implementation

[0019] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0020] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] like Figures 1-3 As shown, the present invention discloses a hydraulic valve-controlled recoil mechanism, including a recoil mechanism body 1, which is arranged above the gun body. The recoil mechanism body 1 includes a recoil outer cylinder 3, and a connecting pin plate 2 is provided on the recoil outer cylinder 3. The recoil mechanism body 1 is connected to the gun body through the connecting pin plate 2.

[0023] The outer cylinder 3 is equipped with a sliding seal for an inner cylinder piston 5. The outer cylinder 3 is also equipped with an inner cylinder 4 connected to the inner cylinder piston 5. A first sealing element is provided between the outer cylinder 3 and the inner cylinder 4. The inner cylinder 4 and the first sealing element are slidably sealed. A first sealing cavity 16 is formed between the inner cylinder 4, the outer cylinder 3, the inner cylinder piston 5, and the first sealing element. The outer cylinder 3 is equipped with a liquid injection port 14 that communicates with the first sealing cavity 16. The first sealing cavity 16 is filled with liquid.

[0024] The inner cylinder 4 is equipped with a sliding seal for a return piston 7. The inner cylinder 4 is equipped with a return rod 6 connected to the return piston 7. The return rod 6 is hollow inside. A second sealing element is provided between the inner cylinder 4 and the return rod 6. The return rod 6 and the second sealing element are slidably sealed. A second sealing cavity 15 is formed between the return rod 6, the inner cylinder 4, the return piston 7 and the second sealing element. The return piston 7 is equipped with a through hole that communicates with the internal cavity of the return rod 6 and the second sealing cavity 15.

[0025] A connector 12 is connected to the outer end of the recoil rod 6, that is, the end of the recoil rod 6 outside the inner cylinder 4. A sealed air chamber 11 is connected to the outside of the connector 12. The air chamber 11 is fixed to the front end of the gun barrel cradle. The connector 12 has a cavity that communicates with the inside of the recoil rod 6. The connector 12 has a through hole that communicates with its internal cavity and the air chamber 11. Through the through hole, the air chamber 11, the internal cavity of the connector 12, and the inside of the recoil rod 6 are connected. The connector 12 is also equipped with an air injection valve 13, which communicates with the internal cavity of the connector 12.

[0026] The recoil rod 6 has a connecting pipe 10 inside. The outer diameter of the connecting pipe 10 is smaller than the inner diameter of the cavity inside the recoil rod 6, so the connecting pipe 10 will not block the cavity inside the recoil rod 6. One end of the connecting pipe 10 is connected to the recoil piston 7, and the other end of the connecting pipe 10 extends out of the recoil rod 6 and passes through the cavity inside the connector 12 to connect to the end of the connector 12. Through the end of the connecting pipe 10 located in the connector 12, the connecting pipe 10 can communicate with the atmosphere. The connector 12 has a threaded plug at a corresponding position to seal the connecting pipe 10.

[0027] The reciprocating piston 7 is equipped with a liquid-gas separation groove, which is connected to the connecting pipe 10. During operation, the reciprocating piston 7 is located below the connecting pipe 10. The liquid in the liquid-gas separation groove is kept at the bottom of the reciprocating piston 7 due to gravity, and excess gas can be discharged to the atmosphere through the connecting pipe 10.

[0028] The inner cylinder 4 connected to the inner cylinder piston 5 is provided with a one-way valve seat 8 at its end, and a one-way valve 9 is provided on the one-way valve seat 8. The one-way valve seat 8 is provided on the inner cylinder piston 5, and the one-way valve 9 can make the interior of the inner cylinder 4 between the inner cylinder piston 5 and the reciprocating piston 7 communicate with the first sealed cavity 16.

[0029] When the pressure difference is greater than that inside the inner cylinder 4 between the inner cylinder piston 5 and the reciprocating piston 7, the one-way valve 9 opens, allowing the liquid in the first sealed cavity 16 to flow into the inner cylinder 4 between the inner cylinder piston 5 and the reciprocating piston 7. The one-way valve 9 is also provided with a flow hole that connects the inside of the inner cylinder 4 between the inner cylinder piston 5 and the reciprocating piston 7 with the first sealed cavity 16.

[0030] Liquid is injected into the first sealed cavity 16 through the injection port 14, and high-pressure gas is injected into the internal cavity of the connector 12 through the gas injection valve 13. The gas fills the gas chamber 11 and the second sealed cavity 15. When the gun is not fired, in order to ensure that the gun body is in a ready-to-fire state and to prevent the gun body from sliding down when the firing angle is greater than zero degrees, the high-pressure gas acts on the inner cylinder 4 to drive the inner cylinder 4 to move forward, that is, to drive the inner cylinder 4 to slide away from the recoil piston 7. The distance between the recoil piston 7 and the inner cylinder piston 5 in the inner cylinder 4 decreases, and the liquid between the recoil piston 7 and the inner cylinder piston 5 in the inner cylinder 4 is pressurized. This realizes the transmission of gas pressure through the recoil piston 7 to the liquid in the rear stroke cavity of the inner cylinder 4 (the cavity between the recoil piston 7 and the inner cylinder piston 5 in the inner cylinder 4), forming a liquid pressure acting on the front end face of the recoil outer cylinder 3 to drive the recoil mechanism.

[0031] During firing and recoil, the gun barrel drives the outer recoil cylinder 3 to recoil. On the one hand, the inner cylinder 4 moves relative to the outer recoil cylinder 3 under the action of air pressure, that is, the distance between the first seal and the inner cylinder piston 5 decreases. The inner cylinder piston 5 is also pressured and drives the inner cylinder 4 to move. Since the recoil piston 7 and the recoil rod 6 are fixed by the air chamber 11, the distance between the inner cylinder piston 5 and the recoil piston 7 increases and the liquid space increases. Under the action of pressure difference, the one-way valve 9 opens, and the liquid in the first sealed cavity 16 flows into the inner cylinder 4 between the inner cylinder piston 5 and the recoil piston 7 through the one-way valve 9. The pressure between the inner cylinder piston 5 and the recoil piston 7 increases, and the inner cylinder piston 5 drives the inner cylinder 4 to move, which reduces the gas volume between the recoil piston 7 and the inner cylinder 4, and compresses the gas to store energy.

[0032] When the gun barrel is returning to its forward position, the one-way valve 9 closes, and the liquid enters the cavity (first sealed cavity 16) between the inner cylinder 4 and the outer cylinder 3 through the liquid outlet on the valve. The liquid forms hydraulic resistance at the liquid outlet, which slows down the return speed of the gun barrel and improves the stability of the gun barrel's return. The liquid through the liquid outlet transmits the gas pressure between the return piston 7 and the inner cylinder 4 to the front end of the outer cylinder 3, forming the stroke power to drive the gun barrel's return and providing return energy for the gun barrel to automatically return to the pre-firing position.

[0033] This invention features a compact structure and light weight. It achieves two-stage relative motion through the recoil rod 6, inner cylinder 4, and outer recoil cylinder 3. Compared to traditional single-stage recoil mechanisms, this allows for a shorter recoil length even with long recoil, resulting in a more compact structure and relatively lighter weight. The invention is reliable and provides stable recoil. When the recoil speed is too high, the one-way valve 9 at the rear end of the inner cylinder 4 closes, increasing hydraulic resistance and reducing the recoil speed, further improving the recoil stability of the artillery. The connecting pipe 10 installed inside the recoil rod 6 connects the liquid-gas separation groove of the recoil piston 7 to the atmosphere, preventing gas-liquid mixing. The connection between the recoil rod 6 and the inner cylinder 4 creates a gas space to provide recoil energy, enabling the gun barrel to maintain its ready-to-fire position and automatically return to its original position after firing.

[0034] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the technical solutions of the present invention. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of the patent of the present invention.

Claims

1. A liquid gas valve control recocking machine characterized by, Includes a recoil mechanism body disposed above the gun barrel, wherein the recoil mechanism body includes: Re-entry outer cylinder; The inner cylinder piston is slidably located inside the outer recoil cylinder; The inner cylinder is slidably disposed inside the recoil outer cylinder and its inner end is connected to the inner cylinder piston; A one-way valve is located at the end of the inner cylinder near the piston of the inner cylinder; The flow hole is located on the one-way valve; The reciprocating piston is slidably positioned within the inner cylinder; The return rod is slidably disposed in the inner cylinder and its inner end is connected to the return piston; The recoil outer cylinder is provided with a connecting pin plate that is connected to the gun body. The recoil rod is fixed to the front end of the gun body cradle. The portion between the recoil outer cylinder, the inner cylinder piston, and the inner cylinder is a first sealed cavity. Liquid is provided in the first sealed cavity and the inner cylinder between the inner cylinder piston and the recoil piston. The portion between the recoil piston and the inner cylinder is a second sealed cavity and gas is provided in the second sealed cavity.

2. The liquid gas valve control recharging machine according to claim 1, wherein, The inner cylinder piston is provided with a one-way valve seat. The one-way valve is located on the one-way valve seat. The one-way valve opens under pressure difference, allowing the liquid in the first sealed cavity to flow into the inner cylinder between the inner cylinder piston and the reciprocating piston.

3. The liquid gas valve control recharging machine according to claim 1, wherein, A first sealing element is provided between the outer cylinder and the inner cylinder, and the inner cylinder slides and seals with the first sealing element.

4. The liquid gas valve control recharging machine according to claim 1, wherein, The outer cylinder of the reciprocating cylinder is provided with a liquid injection port that communicates with the first sealed cavity.

5. The hydraulic-pneumatic valve-controlled reciprocating mechanism according to claim 1, characterized in that, A second sealing element is provided between the inner cylinder and the return rod, and the return rod slides and seals with the second sealing element.

6. The hydraulic-pneumatic valve-controlled reciprocating mechanism according to claim 1, characterized in that, The outer end of the recoil rod is connected to a connector, which is fixed to the front end of the gun barrel cradle.

7. The hydraulic-pneumatic valve-controlled reciprocating mechanism according to claim 6, characterized in that, The recoil rod has an internal cavity, and the recoil piston has a through hole that communicates with the internal cavity of the recoil rod and the second sealed cavity. The connector has a cavity that communicates with the internal cavity of the recoil rod, and the connector has an air injection valve.

8. The hydraulic-pneumatic valve-controlled reciprocating mechanism according to claim 7, characterized in that, The connector is externally connected to a sealed air chamber, which is fixed to the front end of the gun barrel cradle. The connector is provided with a through hole that communicates with its internal cavity and the air chamber.

9. The hydraulic-pneumatic valve-controlled reciprocating mechanism according to claim 8, characterized in that, The reciprocating piston is provided with a liquid-gas separation groove, and the reciprocating rod is provided with a connecting pipe that communicates with the atmosphere. The connecting pipe is connected to the liquid-gas separation groove.

10. The hydraulic-pneumatic valve-controlled reciprocating mechanism according to claim 9, characterized in that, The outer diameter of the connecting pipe is smaller than the inner diameter of the cavity inside the recoil rod. The end of the connecting pipe extends out of the recoil rod and passes through the cavity inside the connector to connect to the end of the connector. The connector is provided with a threaded plug to seal the connecting pipe at the corresponding position.

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