Five-degree-of-freedom pipe bracket for replacing throat assembly of large Laval nozzle

Abstract

The invention relates to the technical field of protective engineering, in particular to a five-degree-of-freedom pipe bracket for replacing a throat assembly of a large Laval nozzle, which comprises a bottom rail assembly, a fixed bracket, a lifting device, a first Y-direction adjusting device, a second Y-direction adjusting device and the Laval nozzle throat assembly, the bottom rail assembly is laid on a base face, the fixing support operates on the bottom rail assembly along the X axis, the first Y-direction adjusting device is connected with the upper end of the left portion of the fixing support through the lifting device, and the second Y-direction adjusting device is connected with the upper end of the right portion of the fixing support. The first Y-direction adjusting device and the second Y-direction adjusting device are Y-axis bidirectional adjusting devices; the Y-axis bidirectional adjusting device comprises a support, a Y-direction rail, a Y-direction displacement mechanism A, a Y-direction displacement mechanism B and a set of supporting assemblies. According to the invention, five-degree-of-freedom adjustment of a large-scale Laval nozzle replacement throat assembly can be realized, and smooth and reliable implementation of butt joint work is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of protective engineering, in particular to protective engineering and the evaluation technology of weapon damage effectiveness. Specifically, it is a five-degree-of-freedom pipe support for replacing the throat component of a large Laval nozzle. Background Art

[0002] Large Laval nozzles are widely used in fields such as aerospace and energy power. Their throat components are the core parts of the nozzle, directly affecting the performance and service life of the nozzle. Since the throat component works in an environment of high temperature, high pressure and high-speed airflow, it is prone to wear and failure, so it needs to be replaced regularly. In addition, the Mach number range that can be simulated by the high dynamic pressure damage effect test equipment is set as Ma4 - 6. The change of the Mach number is usually achieved by using a flexible wall nozzle and replacing the throat nozzle; the flexible wall nozzle can achieve continuous change of the Mach number, but its complex control system is not suitable for large high dynamic pressure damage effect test equipment, and the uniformity of the outlet flow field of this type of nozzle is poor, unable to meet the requirements for the uniformity of the flow field. Therefore, actively replacing the throat component of the Laval nozzle is more suitable for high dynamic pressure damage effect test equipment.

[0003] When replacing and flexibly docking and assembling the throat component of a large-mass Laval nozzle, due to the precise docking and assembling, there are many degrees of freedom for adjustment, the position adjustment mechanism is complex, and the traditional replacement method relies heavily on manual operation, resulting in problems such as low efficiency, poor accuracy and insufficient safety. Summary of the Invention

[0004] Aiming at the problems raised in the background art, the purpose of the present invention is to provide a five-degree-of-freedom pipe support for replacing the throat component of a large Laval nozzle, which can adjust the attitude before docking when replacing the throat component of a large Laval nozzle, and provide a convenient and reliable technical means for the replacement and precise installation of existing and future newly built large nozzle-like components.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A five-degree-of-freedom pipe support for replacing the throat component of a large Laval nozzle, comprising a bottom rail component, a fixed bracket, a lifting device, a first Y-direction adjustment device, a second Y-direction adjustment device, and a Laval nozzle throat component. The Laval nozzle throat component includes a contraction pipe, a first expansion pipe, and a second expansion pipe connected in sequence from left to right along the X-axis. Both the first expansion pipe and the second expansion pipe are conical pipes with an inner diameter smaller at the left end than at the right end. The bottom rail component is laid on the base surface, and the fixed bracket runs along the X-axis on the bottom rail component. The first Y-direction adjustment device is connected to the upper end of the left part of the fixed bracket through the lifting device, and the second Y-direction adjustment device is connected to the upper end of the right part of the fixed bracket. The first Y-direction adjustment device supports the lower part of the first expansion pipe, and the second Y-direction adjustment device supports the lower part of the second expansion pipe. Both the first Y-direction adjustment device and the second Y-direction adjustment device are Y-axis two-way adjustment devices. The Y-axis two-way adjustment device includes a support, a Y-direction track, a Y-direction displacement mechanism A, a Y-direction displacement mechanism B, and a set of support components. The set of support components includes a support component A and a support component B. Among them, the support is connected to the fixed bracket, the Y-direction track is arranged on the support, the Y-direction displacement mechanism A drives the support component A to move at one end of the Y-direction track, the Y-direction displacement mechanism B drives the support component B to move at the other end of the Y-direction track, the support component A and the support component B respectively support on both sides of the bottom of the Laval nozzle throat component, and the support component A and the support component B respectively support an arc wall of the Laval nozzle throat component.

[0006] The Y-direction displacement mechanism A includes a displacement driver A and a slider A. The slider A is slidably matched with the Y-direction track, and the support component A is installed on the slider A. The displacement driver A drives the slider A to drive the support component A to move at one end of the Y-direction track. The Y-direction displacement mechanism B includes a displacement driver B and a slider B. The slider B is slidably matched with the Y-direction track, and the displacement driver B drives the slider B to drive the support component B to move at the other end of the Y-direction track.

[0007] The support component A includes a bottom frame A, a first conical roller, and a second conical roller. The lower end of the bottom frame A is connected to the slider A, and both the first conical roller and the second conical roller are arranged on the upper part of the bottom frame A and rotatably connected to the bottom frame A. The large-diameter ends of the first conical roller and the second conical roller both face the negative X-axis direction, and the small-diameter ends both face the positive X-axis direction. The support component B includes a bottom frame B, a third conical roller, and a fourth conical roller. The lower end of the bottom frame B is connected to the slider B, and both the third conical roller and the fourth conical roller are arranged on the upper part of the bottom frame B and rotatably connected to the bottom frame B. The large-diameter ends of the third conical roller and the fourth conical roller both face the negative X-axis direction, and the small-diameter ends both face the positive X-axis direction. In a set of support components, the first conical roller, the second conical roller, the third conical roller, and the fourth conical roller are sequentially spaced along the Y-axis, and the first conical roller is higher than the second conical roller, and the fourth conical roller is higher than the third conical roller.

[0008] Both the displacement driver A and the displacement driver B are mechanical screw jacks.

[0009] The lifting device includes a Z-direction displacement driver and a guiding mechanism. The lower end of the Z-direction displacement driver is connected to a fixed bracket, and the upper end is connected to a first Y-direction adjusting device. The Z-direction displacement driver drives the first Y-direction adjusting device to move up and down. The guiding mechanism includes an outer sleeve and an inner sleeve. The lower end of the outer sleeve is fixedly connected to the fixed bracket, and the inner sleeve is inserted into the outer sleeve from top to bottom. The upper end of the inner sleeve is connected to the first Y-direction adjusting device.

[0010] The Z-direction displacement driver is a hydraulic jack.

[0011] The bottom rail assembly 1 includes a base, a fixing member 7, and an X-direction parallel rail. The X-direction parallel rail is parallel to the axis of the Laval nozzle. The base is fixed to the base surface through the fixing member 7, and the X-direction parallel rail is fixed on the base.

[0012] Advantages of the present invention: The five-degree-of-freedom pipe support provided by the present invention can realize five motions of the large Laval nozzle for replacing the throat assembly, namely, linear movement along the X-axis, movement in the Y-axis direction, up and down movement in the Z-axis direction, yaw of the throat assembly in the XZ plane, and pitch of the throat assembly in the XY plane. It can realize the attitude adjustment of the large Laval nozzle for replacing the throat assembly before docking, facilitating the smooth and reliable implementation of the docking work. The present invention is applicable to the replacement of throat assemblies of large Laval nozzles with different diameters, and can significantly improve the assembly efficiency and assembly accuracy. Description of the Drawings

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0014] Figure 2 It is a front view of the overall structure.

[0015] Figure 3 It is a top view of the present invention.

[0016] Figure 4 It is a side view of the Y-axis bidirectional adjusting device.

[0017] In the figure: 1 - bottom rail assembly, 2 - fixed bracket, 3 - lifting device, 5 - Laval nozzle throat assembly, 6 - base, 7 - fixing piece, 8 - X-direction parallel rail, 9 - sliding seat; 31 - Z-direction displacement driver, 32 - guiding mechanism; 41 - first Y-direction adjusting device, 42 - second Y-direction adjusting device; 51 - contraction pipe, 52 - first expansion pipe, 53 - second expansion pipe; 401 - support, 402 - Y-direction rail, 403 - Y-direction displacement mechanism A, 404 - Y-direction displacement mechanism B, 405 - support assembly A, 406 - support assembly B; 501 - first conical roller, 502 - second conical roller, 503 - chassis A; 601 - third conical roller, 602 - fourth conical roller, 603 - chassis B; 4031 - displacement driver A, 4032 - slider A, 4041 - displacement driver B, 4042 - slider B. Detailed implementation mode

[0018] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings of this specification. It should be noted that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the protection scope of the present invention.

[0019] As Figures 1-4As shown in the figure, the present invention provides a five-degree-of-freedom pipe support for replacing the throat component of a large Laval nozzle, which includes a bottom rail component 1, a fixed bracket 2, a lifting device 3, a first Y-direction adjustment device 41, a second Y-direction adjustment device 42, and a Laval nozzle throat component 5. The Laval nozzle throat component 5 includes a contraction pipe 51, a first expansion pipe 52, and a second expansion pipe 53 that are sequentially connected from left to right along the X-axis. Both the first expansion pipe 52 and the second expansion pipe 53 are conical pipes with an inner diameter smaller at the left end than at the right end. The bottom rail component 1 is laid on the base surface, and the fixed bracket 2 runs along the X-axis on the bottom rail component 1. The first Y-direction adjustment device 41 is connected to the upper end of the left part of the fixed bracket 2 through the lifting device 3, and the second Y-direction adjustment device 42 is connected to the upper end of the right part of the fixed bracket 2. The first Y-direction adjustment device 41 supports the lower part of the first expansion pipe 52, and the second Y-direction adjustment device 42 supports the lower part of the second expansion pipe 53. Both the first Y-direction adjustment device 41 and the second Y-direction adjustment device 42 are Y-axis two-way adjustment devices. The Y-axis two-way adjustment device includes a support 401, a Y-direction track 402, a Y-direction displacement mechanism A 403, a Y-direction displacement mechanism B 404, and a set of support components. The set of support components includes a support component A 405 and a support component B 406. The support 401 is connected to the fixed bracket 2, and the Y-direction track 402 is arranged on the support 401. The Y-direction displacement mechanism A 403 includes a displacement driver A 4031 and a slider A 4032. The slider A 4032 is slidably connected to the Y-direction track 402, and the displacement driver A 4031 drives the slider A 4032 to move at one end of the Y-direction track 402. The Y-direction displacement mechanism B 404 includes a displacement driver B 4041 and a slider B 4042. The displacement driver B 4041 drives the slider B 4042 to move at the other end of the Y-direction track 402. The support component A 405 is installed on the slider A 4032, and the support component B 406 is installed on the slider B 4042. The support component A 405 and the support component B 406 respectively support both sides of the bottom of the Laval nozzle throat component 5, and the support component A 405 and the support component B 406 respectively support an arc wall of the Laval nozzle throat component 5.

[0020] The support component A 405 includes a bottom frame A 503, a first conical roller 501, and a second conical roller 502. The lower end of the bottom frame A 503 is connected to the slider A 4032. Both the first conical roller 501 and the second conical roller 502 are arranged on the upper part of the bottom frame A 503 and are rotatably connected to the bottom frame A 503. The large-diameter ends of both the first conical roller 501 and the second conical roller 502 face the negative X-axis direction, and the small-diameter ends face the positive X-axis direction. The support assembly B406 includes a chassis B603, a third conical roller 601, and a fourth conical roller 602. The lower end of the chassis B603 is connected to a slider B4042. Both the third conical roller 601 and the fourth conical roller 602 are arranged on the upper part of the chassis B603 and are rotatably connected to the chassis B603. The large-diameter ends of both the third conical roller 601 and the fourth conical roller 602 face the negative X-axis direction, and the small-diameter ends face the positive X-axis direction. In a set of support assemblies, the first conical roller 501, the second conical roller 502, the third conical roller 601, and the fourth conical roller 602 are sequentially spaced along the Y-axis, and the first conical roller 501 is higher than the second conical roller 502, and the fourth conical roller 602 is higher than the third conical roller 601.

[0021] The five-degree-of-freedom pipe support designed by the present invention can adjust the multi-directional postures of the Laval nozzle throat assembly 5 before docking. Among them, moving the fixed bracket 2 on the bottom rail assembly 1 can adjust the X direction of the Laval nozzle throat assembly 5; making the Y-direction displacement mechanisms A403 and B404 in the first Y-direction adjustment device 41 and the second Y-direction adjustment device 42Y move synchronously in the same direction can adjust the Y direction of the Laval nozzle throat assembly 5; making the Y-direction displacement mechanisms A403 and B404 in the first Y-direction adjustment device 41 and the second Y-direction adjustment device move synchronously in the reverse direction can adjust the Z direction of the Laval nozzle throat assembly 5; adjusting the first Y-direction adjustment device 41 or the second Y-direction adjustment device 42 alone to move in the Y direction can make the Laval nozzle throat assembly 5 rotate in the XY plane; adjusting the height of the first Y-direction adjustment device 41 through the lifting device 3 can make the Laval nozzle throat assembly 5 rotate in the XZ plane. The above adjustment methods can achieve five-degree-of-freedom adjustment.

[0022] Both the displacement driver A403 and the displacement driver B404 are mechanical screw jacks.

[0023] The lifting device 3 includes a Z-direction displacement driver 31 and a guiding mechanism 32. The lower end of the Z-direction displacement driver 31 is connected to the fixed bracket 2, and the upper end is connected to the first Y-direction adjustment device 41. The Z-direction displacement driver 31 drives the first Y-direction adjustment device 41 to move up and down. The guiding mechanism 32 includes an outer sleeve and an inner sleeve. The lower end of the outer sleeve is fixedly connected to the fixed bracket 2, and the inner sleeve is inserted into the outer sleeve from top to bottom. The upper end of the inner sleeve is connected to the first Y-direction adjustment device 41.

[0024] The side wall of the outer sleeve is provided with a locking screw, and the locking screw is threadedly connected to the outer sleeve. When the inner sleeve is lifted or lowered, the locking screw is loosened; when the inner sleeve is lifted or lowered to a predetermined position, the locking screw is screwed, and the locking screw presses and fixes the inner sleeve to prevent the inner sleeve from sliding down.

[0025] In one embodiment of the present invention, the Z-direction displacement driver 31 is a hydraulic jack.

[0026] The bottom rail assembly 1 includes a base 6, a fixing member 7, and an X-direction parallel rail 8. The X-direction parallel rail 8 is parallel to the axis of the Laval nozzle. The base 6 is fixed to the base surface through the fixing member 7, and the X-direction parallel rail 8 is fixed on the base 6.

[0027] In one embodiment of the present invention, the fixing bracket 2 is a frame structure, which includes longitudinal beams 13, column members 14, and cross beams 15. The plurality of longitudinal beams 13, the plurality of cross beams 15, and the four column members 14 form a rectangular frame structure of the fixing bracket 2. The four corners of the lower part of the fixing bracket 2 are respectively in sliding fit with the X-direction parallel rail 8 through sliding seats 9.

[0028] Parts not detailed in the present invention are prior art.

Claims

1. A five-degree-of-freedom pipe support for replacing a throat assembly of a large Laval nozzle, comprising a bottom rail assembly (1), a fixing bracket (2), a lifting device (3), a first Y-direction adjustment device (41), a second Y-direction adjustment device (42), and a Laval nozzle throat assembly (5), wherein the Laval nozzle throat assembly (5) comprises a contraction tube (51), a first expansion tube (52), and a second expansion tube (53) connected in sequence from left to right along an X-axis, wherein both the first expansion tube (52) and the second expansion tube (53) are tapered tubes with a left end inner diameter smaller than a right end inner diameter; wherein: The bottom rail assembly (1) is laid on a base surface, the fixed bracket (2) runs on the bottom rail assembly (1) along the X-axis, the first Y-axis adjustment device (41) is connected to the upper left end of the fixed bracket (2) through the lifting device (3), the second Y-axis adjustment device (42) is connected to the upper right end of the fixed bracket (2), the first Y-axis adjustment device (41) is supported on the lower part of the first expansion tube (52), the second Y-axis adjustment device (42) is supported on the lower part of the second expansion tube (53), the first Y-axis adjustment device (41) and the second Y-axis adjustment device (42) are both Y-axis bidirectional adjustment devices; the Y-axis bidirectional adjustment device comprises a support (401), a Y-axis track (402), a Y-axis displacement mechanism A (403), a Y-axis displacement mechanism B (404) and A group of support assemblies, wherein the group of support assemblies comprises a support assembly A (405) and a support assembly B (406), wherein a support (401) is connected to a fixed bracket (2), a Y-direction track (402) is arranged on the support (401), the Y-direction displacement mechanism A (403) drives the support assembly A (405) to move at one end of the Y-direction track (402), and the Y-direction displacement mechanism B (404) drives the support assembly B (406) to move at the other end of the Y-direction track (402), the support assembly A (405) and the support assembly B (406) are respectively supported on both sides of the bottom of a Laval nozzle throat assembly (5), and the support assembly A (405) and the support assembly B (406) respectively support a section of the circular arc wall of the Laval nozzle throat assembly (5).

2. A five-degree-of-freedom pipe support for replacing a throat assembly of a large Laval nozzle according to claim 1, characterized in that: The Y-direction displacement mechanism A (403) comprises a displacement driver A (4031) and a slider A (4032), wherein the slider A (4032) is slidably matched with the Y-direction track (402), and the support assembly A (405) is mounted on the slider A (4032), and the displacement driver A (4031) drives the support assembly A (405) to move at one end of the Y-direction track (402) by driving the slider A (4032); the Y-direction displacement mechanism B (404) comprises a displacement driver B (4041) and a slider B (4042), wherein the slider B (4042) is slidably matched with the Y-direction track (402), and the displacement driver B (4041) drives the support assembly B (406) to move at the other end of the Y-direction track (402) by driving the slider B (4042).

3. A five-degree-of-freedom pipe support for replacing a throat assembly of a large Laval nozzle according to claim 1, characterized in that: The support assembly A (405) comprises a base frame A (503), a first tapered roller (501) and a second tapered roller (502); the lower end of the base frame A (503) is connected to the Y-axis displacement mechanism A (403); the first tapered roller (501) and the second tapered roller (502) are both arranged on the upper part of the base frame A (503) and are rotatably connected to the base frame A (503); the large diameter ends of the first tapered roller (501) and the second tapered roller (502) are both oriented towards the negative direction of the X-axis, and the small diameter ends are both oriented towards the positive direction of the X-axis; The support assembly B (406) comprises a base frame B (603), a third tapered roller (601) and a fourth tapered roller (602); the lower end of the base frame B (603) is connected to the Y-direction displacement mechanism B (404); the third tapered roller (601) and the fourth tapered roller (602) are both arranged on the upper part of the base frame B (603) and are rotatably connected to the base frame B (603); the large diameter ends of the third tapered roller (601) and the fourth tapered roller (602) are both oriented towards the negative direction of the X-axis, and the small diameter ends are both oriented towards the positive direction of the X-axis; In a group of support components, the first tapered roller (501), the second tapered roller (502), the third tapered roller (601) and the fourth tapered roller (602) are spaced apart in sequence along the Y axis, and the first tapered roller (501) is higher than the second tapered roller (502), and the fourth tapered roller (602) is higher than the third tapered roller (601).

4. A five-degree-of-freedom pipe support for replacing a throat assembly of a large Laval nozzle according to claim 1, characterized in that: The displacement driver A (4031) and the displacement driver B (4041) are both mechanical screw jacks.

5. The five-degree-of-freedom pipe support for replacing the throat assembly of a large Laval nozzle according to claim 1, characterized in that: The lifting device (3) comprises a Z-direction displacement driver (31) and a guide mechanism (32); the lower end of the Z-direction displacement driver (31) is connected to the fixed support (2), and the upper end is connected to the first Y-direction adjustment device (41); the Z-direction displacement driver (31) drives the first Y-direction adjustment device (41) to move up and down; and the guide mechanism (32) comprises an outer sleeve and an inner sleeve; the lower end of the outer sleeve is fixedly connected to the fixed support (2), the inner sleeve is inserted into the outer sleeve from top to bottom, and the upper end of the inner sleeve is connected to the first Y-direction adjustment device (41).

6. A five-degree-of-freedom pipe support for replacing a throat assembly of a large Laval nozzle according to claim 5, characterized in that: A locking screw is passed through the side wall of the outer sleeve, and the locking screw is threadedly connected to the outer sleeve. When the inner sleeve is raised or lowered, the locking screw is loosened; when the inner sleeve is raised or lowered to a predetermined position, the locking screw is screwed, and the locking screw is pressed and fixed to prevent the inner sleeve from sliding down.

7. A five-degree-of-freedom pipe support for replacing a throat assembly of a large Laval nozzle according to claim 5, characterized in that: The Z-direction displacement driver (31) is a hydraulic jack.

8. The five-degree-of-freedom pipe support for replacing the throat assembly of a large Laval nozzle according to claim 1, characterized in that: The bottom rail assembly (1) comprises a base (6), a fixing member (7) and an X-direction parallel rail (8), wherein the X-direction parallel rail (8) is parallel to the axis of the Laval nozzle, the base (6) is fixed to a base surface via the fixing member (7), and the X-direction parallel rail (8) is fixed to the base (6).

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