Reliable backward-falling and rebound-free backward-falling buffer cylinder for rocket launching

Abstract

The invention relates to an air cylinder, in particular to a reliable backward-falling and rebound-free backward-falling buffer cylinder for rocket launching, which comprises an air cylinder body, an air cylinder piston rod, an air cylinder piston, a spring, a buffer cylinder body, a buffer piston, a throttle lever and a connecting piece, the buffer cylinder body, the buffer piston and the throttle lever are all located in a rodless cavity of the air cylinder body, the center line of the air cylinder piston, the center line of the throttle lever and the center line of the buffer piston are located on the same straight line, the rodless cavity of the buffer cylinder body is filled with hydraulic oil, and a pressure measuring opening is formed in the buffer cylinder body. A through hole is formed in the end portion of one end, located in the buffer cylinder body, of the buffer piston, the end portion of the other end of the throttling rod is arranged in the through hole, a gap is reserved between the through hole and the throttling rod, and the gap forms an annular throttling oil channel. The supporting arm can be driven to reliably and rapidly fall backwards after a rocket is ignited, and rebounding is avoided after falling backwards.

Description

Technical Field

[0001] The invention relates to a cylinder, in particular to a reliable recoil-free and rebound-free recoil buffer cylinder for rocket launching. Background Art

[0002] In the field of aerospace launch technology, the support arm is an important structure that supports the rocket body. For the rocket support arm supported at the waist, it is necessary to take a backward falling measure to prevent the supporting part of the support arm from interfering with the rocket body, nozzle and other structures after the aircraft takes off and separates. Aerospace engineering has extremely high requirements for reliability and safety. The support arm needs to be able to fall back reliably and quickly after the rocket is ignited. Since the main body of the support arm is generally heavy and has a large kinetic energy during the rapid backward falling process, the support arm is prone to a large rebound after falling back into place. In severe cases, the rebounding support arm will collide with the rocket body after takeoff, affecting the safety of takeoff. Therefore, there is an urgent need for a rebound-free support arm. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a reliable and rebound-free backward buffer cylinder for rocket launch, which can drive the support arm to fall back quickly and reliably after the rocket is ignited and has no rebound after falling back.

[0004] In order to solve the above technical problems, this application provides the following technical solutions:

[0005] The present invention provides a reliable backward and rebound-free backward buffer cylinder for rocket launching, comprising a cylinder body, a cylinder piston rod, a cylinder piston, a spring, a buffer body, a buffer piston, a throttle rod, and a connecting piece. The cylinder piston is connected to one end of the cylinder piston rod, the spring is sleeved on the cylinder piston rod and the spring is located between the front end of the cylinder body and the cylinder piston, an air inlet is provided at one end of the rodless cavity of the cylinder body, the buffer body, the buffer piston, and the throttle rod are all located in the rodless cavity of the cylinder body, the buffer body is connected to the rear end of the cylinder body, and the buffer piston is hollow Part, one end of the throttle rod and the buffer piston are both arranged in the buffer cylinder body, the throttle rod is arranged along the length direction of the buffer cylinder body, the center lines of the cylinder piston, the throttle rod and the buffer piston are on the same straight line, one end of the throttle rod is connected to the buffer cylinder body, the rodless cavity of the buffer cylinder body is filled with hydraulic oil, the buffer cylinder body is provided with a pressure measuring port, one end of the buffer piston located in the buffer cylinder body is provided with a through hole, the other end of the throttle rod is arranged in the through hole, a gap is left between the through hole and the throttle rod, and the gap forms an annular throttling oil channel.

[0006] Furthermore, the cylinder piston includes a piston seat and a piston ring. The piston seat is connected to the cylinder piston rod, the piston ring is connected to the outer wall of the piston seat, and the piston ring is in contact with the inner wall of the cylinder body.

[0007] Furthermore, the spring is divided into a first spring segment and a second spring segment, and the outer wall of the cylinder piston rod is connected with a spring partition, a first rigid support plate, and a second rigid support plate. The first rigid support plate and the second rigid support plate are respectively located on both sides of the spring partition. The first spring segment is sleeved on the first rigid support plate, and the second spring segment is sleeved on the second rigid support plate. The width of the first rigid support plate is equal to the length of the first spring segment after being fully compressed, and the width of the second rigid support plate is equal to the length of the second spring segment after being fully compressed.

[0008] Furthermore, the cylinder body includes a front end cover, a rear end cover, and a cylinder barrel that are connected to each other. The inner ring of the front end cover is in contact with the cylinder piston rod, and the air inlet is provided on the rear end cover.

[0009] Furthermore, it also includes a bushing, which is connected to the inner ring of the front end cover and contacts the cylinder piston rod.

[0010] Furthermore, it also includes a connecting piece, which is connected to one end of the cylinder piston rod located outside the cylinder body, and is used to connect the supported part, and the connecting piece is a rod end bearing.

[0011] Furthermore, it also includes a mounting member, which is a support ear provided on the rear end cover, and the cylinder body is connected to the supported member through the support ear.

[0012] Furthermore, a pressure measuring channel is provided on the rear end cover, and the pressure measuring channel is communicated with the pressure measuring port.

[0013] Furthermore, the outer wall of the throttle rod is stepped, and the diameter of the throttle rod at one end away from the buffer piston is larger than the diameter of the throttle rod at one end close to the buffer piston.

[0014] Furthermore, a central hole extending along the length direction is provided in the throttle rod, the pressure measuring channel is connected to the central hole, and a pressure measuring joint is provided at the end of the pressure measuring channel.

[0015] Compared with the prior art, the reliable and rebound-free recoil buffer cylinder for rocket launch of the present invention has at least the following beneficial effects:

[0016] The present invention provides a reliable backward fallback and rebound-free backward fallback buffer cylinder for rocket launching. The cylinder includes a buffer cylinder body, a buffer piston, and a throttle rod. The buffer piston is a hollow part. A gap is left between the through hole at the end of the buffer piston and the throttle rod. The gap forms an annular throttling oil channel. The center lines of the cylinder piston, the throttle rod, and the buffer piston are on the same straight line. Therefore, when the support arm falls backward, the cylinder piston compresses the buffer piston, and liquid throttling is used to achieve backward fall energy dissipation of the support arm, and the kinetic energy of the support arm is converted into liquid internal energy, so that the support arm falls backward quickly without rebound. An air inlet is provided at one end of the rodless cavity of the cylinder body, and a pressure measuring port is provided on the buffer cylinder body to achieve separation of the air inlet and the pressure measuring port.

[0017] The reliable backward falling back and rebound-free backward falling buffer cylinder for rocket launching of the present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of a reliable, rebound-free recoil buffer cylinder for rocket launch according to the present invention;

[0019] Figure 2 This is an axonometric diagram of a reliable, rebound-free recoil buffer cylinder for rocket launch according to the present invention;

[0020] Figure 3 A cross-sectional view of a reliable, rebound-free recoil buffer cylinder for rocket launch according to the present invention;

[0021] Figure 4 A cross-sectional view of the reliable and rebound-free recoil buffer cylinder for rocket launch according to the present invention when it is retracted into place;

[0022] Figure 5 This is a schematic structural diagram of a reliable and rebound-free fallback buffer cylinder for rocket launch in a supporting state after being installed on a support arm;

[0023] Figure 6 The present invention is a structural schematic diagram of a reliable and rebound-free fallback buffer cylinder for rocket launch installed on a support arm in a fallback position. DETAILED DESCRIPTION

[0024] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown, the present invention provides a reliable backward and rebound-free backward buffer cylinder for rocket launching, comprising a cylinder body 01, a cylinder piston rod 02, a cylinder piston 03, a spring 04, a buffer body 05, a buffer piston 06, a throttle rod 07, a connecting piece 08 and a mounting piece. The cylinder piston 03 is connected to one end of the cylinder piston rod 02, a sealing device is provided between the cylinder piston 03 and the cylinder body 01, the spring 04 is sleeved on the cylinder piston rod 02 and the spring 04 is located between the front end of the cylinder body 01 and the cylinder piston 03, an air inlet 14 is provided at one end of the rodless cavity of the cylinder body 01, the connecting piece 08 is connected to one end of the cylinder piston rod 02 located outside the cylinder body 01, the connecting piece 08 is used to connect to the supported part, the mounting piece is connected to one end of the cylinder body 01 away from the cylinder piston rod 02, the cylinder body 01 is connected to the supported part through the mounting piece, the buffer body 05, the buffer piston The plug 06 and the throttle rod 07 are both located in the rodless cavity of the cylinder body 01. The buffer cylinder body 05 is connected to the rear end of the cylinder body 01. The buffer piston 06 is a hollow part. The throttle rod 07 and one end of the buffer piston 06 are both located in the buffer cylinder body 05. The buffer piston 06 is suitable for sliding axially relative to the buffer cylinder body 05. The throttle rod 07 is arranged along the length direction of the buffer cylinder body 05. The center lines of the cylinder piston 03, the throttle rod 07 and the buffer piston 06 are on the same straight line. One end of the throttle rod 07 is connected to the buffer cylinder body 05. The rodless cavity of the buffer cylinder body 05 is filled with hydraulic oil and high-pressure gas. The buffer cylinder body 05 is provided with a pressure measuring port. One end of the buffer piston 06 located in the buffer cylinder body 05 is provided with a through hole 61. The other end of the throttle rod 07 is arranged in the through hole 61. A gap is left between the through hole 61 and the throttle rod 07. The gap forms an annular throttling oil channel. Figure 5 As shown, in this embodiment, when the reliable and rebound-free fallback buffer cylinder for rocket launch of the present invention is connected to the support arm 10, the connecting part 08 and the mounting part are hinged to the upper and lower hinged ends of the support arm 10 respectively.

[0025] The use process of the reliable and rebound-free recoil buffer cylinder for rocket launch of the present invention is as follows:

[0026] 1) To achieve the vertical action of the support arm: fill the rodless cavity of the cylinder body 01 with high pressure gas through the air inlet 14. When the pressure in the rodless cavity of the cylinder body 01 is greater than the sum of the pressure of the spring 04 in the rod cavity and the axial component of the weight of the support arm 10, the support arm 10 will be vertical. Figure 5 As shown, at the same time, the spring 04 is continuously compressed to store elastic potential energy until the support arm 10 is erected to 90°;

[0027] 2) Pre-launch detection action: Before the rocket is launched, the pressure in the buffer cylinder 05 needs to be measured. The specific method is to use a handheld pressure gauge or an online pressure sensor to connect to the pressure measuring port, and directly read the air pressure value in the buffer cylinder 05. When the air pressure does not meet the minimum pressure requirement, the inflation device is used to replenish the pressure;

[0028] 3) Pre-launch deflation: Before the rocket is launched, the high-pressure gas in the rodless chamber of the cylinder body 01 is released, so that the backward buffer cylinder of the present invention continuously applies a tensile load to the support arm 10 under the tension of the spring 04. At this time, the rocket has not yet left the support arm 10, and the support arm 10 cannot fall backward;

[0029] 4) Realize the backward falling action of the supporting arm: After the rocket leaves the supporting arm 10, under the tension of the spring 04, the supporting arm 10 falls backward around the support ear at the lower end of the supporting arm;

[0030] 5) Realize buffer braking: When the supporting arm 10 is close to the state of falling back into place, the rear end face of the cylinder piston rod 02 contacts and collides with the front end of the buffer piston 06, and compresses the buffer piston 06. The hydraulic oil in the buffer cylinder body 05 is forced to flow through the annular throttling oil channel between the buffer piston 06 and the buffer throttle rod 07 to generate flow resistance, forming a buffer braking force on the cylinder piston rod 02. Within the entire stroke range of the buffer piston 06, the buffer braking force can be provided to the cylinder piston rod 02. When the supporting arm 10 falls back into place, the kinetic energy of the supporting arm 10 is completely converted into the internal energy of the liquid in the buffer cylinder body 05, so that the supporting arm 10 falls back without rebound. Figure 6 shown.

[0031] The present invention provides a reliable backward fallback and rebound-free backward fallback buffer cylinder for rocket launching. Since it includes a buffer cylinder body 05, a buffer piston 06, and a throttle rod 07, the buffer piston 06 is a hollow part, and a gap is left between the through hole 61 at the end of the buffer piston 06 and the throttle rod 07, the gap forms an annular throttling oil channel, and the center lines of the cylinder piston 03, the throttle rod 07, and the buffer piston 06 are on the same straight line. Therefore, when the support arm 10 falls backward, the cylinder piston 03 compresses the buffer piston 06, and liquid throttling is used to realize the backward fall energy dissipation of the support arm 10, and the kinetic energy of the support arm 10 is converted into liquid internal energy, so that the support arm falls backward quickly without rebound; and an air inlet 14 is provided at one end of the rodless cavity of the cylinder body 01, and a pressure measuring port is provided on the buffer cylinder body 05 to realize the separation of the air inlet and the pressure measuring port.

[0032] Optionally, the cylinder piston 03 includes a piston seat 31 and a piston ring 32. The piston seat 31 is connected to the cylinder piston rod 02, and the piston ring 32 is connected to the outer wall of the piston seat 31. The piston ring 32 contacts the inner wall of the cylinder body 01. Specifically, the piston seat 31 is made of steel to bear spring loads and buffer loads, and the piston ring 32 is made of copper to slide with the inner wall of the cylinder body. The piston seat 31 is connected to the cylinder piston rod 02 via a locking nut 33. The piston ring 32 is threaded onto the piston seat 31. The outer surface of the piston ring 32 is provided with a sealing ring and a dust ring.

[0033] Optionally, the spring 04 is divided into a first spring segment 41 and a second spring segment 42. The outer wall of the cylinder piston rod 02 is provided with a spring partition 21, a first rigid support plate 22, and a second rigid support plate 23. The spring partition 21, the first rigid support plate 22, and the second rigid support plate 23 overlap with the cylinder piston rod 02. The first rigid support plate 22 and the second rigid support plate 23 are respectively located on both sides of the spring partition 21. The first spring segment 41 is sleeved on the first rigid support plate 22, and the second spring segment 42 is sleeved on the second rigid support plate 23. The first spring segment 41 and the second spring segment 42 form a series spring. The width of the first rigid support plate 22 is equal to the length of the first spring segment 41 after being fully compressed, and the width of the second rigid support plate 23 is equal to the length of the second spring segment 41 after being fully compressed. Specifically, the first rigid support plate 22 and the second rigid support plate 23 are both annular plates connected to the outer wall of the cylinder piston rod 02, and the spring partition 21 is a radial boss connected to the outer wall of the cylinder piston rod 02. During the erection process of the support arm, when high-pressure gas is filled into the rodless cavity of the cylinder body 01, the pressure in the rodless cavity of the cylinder body 01 is greater than the sum of the pressure of the spring 04 in the rod cavity and the axial component of the gravity of the support arm 10, the first spring section 41 and the second spring section 42 are continuously compressed to store elastic potential energy until the support arm 10 is erected to 90°, and the two ends of the first rigid support plate 22 and the second rigid support plate 23 are pressed by the front end of the cylinder body 01, the spring partition 21 and the piston seat 31. After the rocket leaves the support arm 10, under the tension of the first spring section 41 and the second spring section 42, the support arm 10 falls backward around the support ear at the lower end of the support arm. If one of the two spring sections fails, due to the support of the first rigid support plate 22 and the second rigid support plate 23, the failed spring will not collapse and will still maintain the initial working height. Under the tension of the other section of the non-failed spring, the support arm 10 can still fall backward, realizing redundant falling power and meeting the high reliability requirements of aerospace engineering.

[0034] Optionally, cylinder body 01 comprises a front cover 11, a rear cover 12, and a cylinder barrel 13, which are interconnected. The inner ring of front cover 11 contacts the cylinder piston rod 02, and the air inlet 14 is provided on rear cover 12. Specifically, cylinder barrel 13 is bolted to front cover 11, and a dust seal is mounted on the inner ring of front cover 11. Damper cylinder body 05 comprises a damper front cover 51 and a damper barrel 52, which are interconnected.

[0035] Optionally, a bushing 15 is further included, which is connected to the inner ring of the front end cover 11 and contacts and slides with the cylinder piston rod 02. The bushing 15 is made of copper.

[0036] Optionally, the connector 08 is a rod end bearing, which is connected to a lug of the support arm 10 to facilitate the support arm 10 to stand up and fall back.

[0037] Optionally, the mounting member is a lug 121 provided on the rear end cover 12 , and the cylinder body 01 is mounted and connected to the supported member via the lug 121 .

[0038] Optionally, a pressure measuring channel 122 is provided on the rear end cover 12 , and the pressure measuring channel 122 is communicated with the pressure measuring port on the buffer cylinder 05 .

[0039] Optionally, the outer wall of the throttle rod 07 is stepped, and the diameter of the end of the throttle rod 07 away from the buffer piston 06 is larger than the diameter of the end close to the buffer piston 06. The diameter change of the throttle rod 07 can ensure that the buffer load changes according to the required rules along the compression stroke.

[0040] Optionally, a central hole extending along the length of throttle rod 07 is provided within throttle rod 07, with pressure measuring channel 122 communicating with the central hole. A pressure measuring connector 123 is provided at the end of pressure measuring channel 122. To measure the pressure within buffer cylinder 05, a handheld pressure gauge or in-line pressure sensor can be connected to pressure measuring connector 123, which is convenient and quick.

[0041] The above embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A reliable and rebound-free fallback buffer cylinder for rocket launching, characterized in that: The invention comprises a cylinder body (01), a cylinder piston rod (02), a cylinder piston (03), a spring (04), a buffer body (05), a buffer piston (06), a throttle rod (07), and a connecting piece (08), wherein the cylinder piston is connected to one end of the cylinder piston rod (02), the spring (04) is sleeved on the cylinder piston rod (02) and the spring (04) is located between the front end of the cylinder body (01) and the cylinder piston (03), an air inlet (14) is provided at one end of the rodless cavity of the cylinder body (01), the buffer body (05), the buffer piston (06), and the throttle rod (07) are all located in the rodless cavity of the cylinder body (01), the buffer body (05) is connected to the rear end of the cylinder body (01), the buffer piston (06) is a hollow piece, and the throttle rod (07) is a hollow piece. The throttle rod (07) and one end of the buffer piston (06) are both arranged in the buffer cylinder body (05), the throttle rod (07) is arranged along the length direction of the buffer cylinder body (05), the center lines of the cylinder piston (03), the throttle rod (07) and the buffer piston (06) are on the same straight line, one end of the throttle rod (07) is connected to the buffer cylinder body (05), the rodless chamber of the buffer cylinder body (05) is filled with hydraulic oil, the buffer cylinder body (05) is provided with a pressure measuring port, one end of the buffer piston (06) located in the buffer cylinder body (05) is provided with a through hole (61), the other end of the throttle rod (07) is arranged in the through hole (61), a gap is left between the through hole (61) and the throttle rod (07), and the gap forms an annular throttling oil channel.

2. The rocket launch reliable recoil and rebound-free recoil buffer cylinder according to claim 1, characterized in that: The cylinder piston (03) comprises a piston seat (31) and a piston ring (32); the piston seat (31) is connected to the cylinder piston rod (02); the piston ring (32) is connected to the outer wall of the piston seat (31); and the piston ring (32) is in contact with the inner wall of the cylinder body (01).

3. The rocket launch reliable backward falling, non-rebound backward falling buffer cylinder according to claim 1, characterized in that: The spring (04) is divided into a first spring section (41) and a second spring section (42); the outer wall of the cylinder piston rod (02) is connected with a spring partition (21), a first rigid support plate (22), and a second rigid support plate (23); the first rigid support plate (22) and the second rigid support plate (23) are respectively located on both sides of the spring partition (21); the first spring section (41) is sleeved on the first rigid support plate (22); the second spring section (42) is sleeved on the second rigid support plate (23); the width of the first rigid support plate (22) is equal to the length of the first spring section (41) after being fully compressed; and the width of the second rigid support plate (23) is equal to the length of the second spring section (41) after being fully compressed.

4. The rocket launch reliable recoil and rebound-free recoil buffer cylinder according to claim 1, characterized in that: The cylinder body (01) comprises a front end cover (11), a rear end cover (12), and a cylinder barrel (13) which are connected to each other; the inner ring of the front end cover (11) is in contact with the cylinder piston rod (02); and the air inlet (14) is arranged on the rear end cover (12).

5. The rocket launch reliable backward falling, non-rebound backward falling buffer cylinder according to claim 4, characterized in that: It also includes a bushing (15), which is connected to the inner ring of the front end cover (11), and the bushing (15) is in contact with the cylinder piston rod (02).

6. The rocket launch reliable recoil and rebound-free recoil buffer cylinder according to claim 1, characterized in that: It also includes a connecting piece (08), wherein the connecting piece (08) is connected to an end portion of the cylinder piston rod (02) located outside the cylinder body (01), and the connecting piece (08) is used to connect a supported member, and the connecting piece (08) is a rod end bearing.

7. The rocket launch reliable recoil and rebound-free recoil buffer cylinder according to claim 4, characterized in that: It also comprises a mounting member, which is a support ear (121) arranged on the rear end cover (12), and the cylinder body (01) is connected to the supported member via the support ear (121).

8. The rocket launch reliable recoil and rebound-free recoil buffer cylinder according to claim 4, characterized in that: The rear end cover (12) is provided with a pressure measuring channel (122), and the pressure measuring channel (122) is communicated with the pressure measuring port.

9. The rocket launch reliable recoil and rebound-free recoil buffer cylinder according to claim 8, characterized in that: The outer wall of the throttle rod (07) is in a step shape, and the diameter of the end of the throttle rod (07) away from the buffer piston (06) is larger than the diameter of the end close to the buffer piston (06).

10. The rocket launch reliable recoil and rebound-free recoil buffer cylinder according to claim 9, characterized in that: The throttle rod (07) is provided with a central hole extending in the length direction, the pressure measuring channel (122) is connected to the central hole, and a pressure measuring joint (123) is provided at the end of the pressure measuring channel (122).

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