Abrasive flow polishing device for surface treatment of rocket engine impeller

Abstract

The present invention relates to the technical field of impeller polishing, and in particular to an abrasive flow polishing device for surface treatment of rocket engine impellers. In view of the risk of deformation of the impeller caused by rotational grinding during polishing by existing devices, an abrasive flow polishing device for surface treatment of rocket engine impellers is provided, comprising a polishing table, wherein a mounting box capable of moving up and down is provided on the polishing table, a main shaft is provided inside the mounting box, a rotatable drive shaft is also provided inside the mounting box, a polishing barrel is provided on the inner wall of the polishing table, abrasive is contained in the polishing barrel, and a pressure cover that matches the polishing barrel is provided at the lower end of the mounting box; when the mounting box moves downward to a specified position, the impeller can enter the polishing barrel and contact the abrasive, and the pressure cover can seal the upper port of the polishing barrel. At this time, when the drive shaft rotates, the impeller can be made to rotate intermittently while oscillating up and down; by continuously oscillating the impeller up and down instead of traditional rotational grinding, deformation of the impeller can be prevented.

Description

Technical Field

[0001] The invention relates to the technical field of impeller polishing, in particular to an abrasive flow polishing device for surface treatment of a rocket engine impeller. Background Art

[0002] In the aerospace industry, rocket engines, as core power units, have a performance that directly determines the success or failure of space missions. As key components, rocket engine impellers have extremely high surface quality requirements. Even small imperfections and roughness on the impeller surface can cause airflow disturbances under high-speed rotation and extreme temperatures and pressures, increasing energy loss, reducing engine efficiency and reliability, and even potentially leading to serious safety accidents. Therefore, achieving high-precision polishing of the impeller surface is crucial.

[0003] Traditional surface polishing techniques, such as mechanical polishing and chemical polishing, have numerous limitations when applied to rocket engine impellers. Mechanical polishing relies on manual labor, making it difficult to achieve uniform polishing on the complex curved surfaces of the impellers. Furthermore, it is inefficient and prone to surface damage. While chemical polishing can improve surface quality to a certain extent, the use of chemical reagents can cause environmental pollution and has limited ability to achieve high-precision surface roughness control.

[0004] As an advanced surface treatment method, abrasive flow polishing technology has been gradually applied to the processing of aerospace parts in recent years. It achieves the purpose of polishing by flowing a semi-solid fluid medium containing abrasive particles on the surface of the workpiece and utilizing the grinding effect of the abrasive particles to remove the material. However, the existing abrasive flow polishing device still exposes a series of problems in the process of treating rocket engine impellers. For example, the publication number is: CN105382672A, and the name is: A device based on soft abrasive flow polishing impeller. Although the device solves the problem of greatly increasing the chance of collision between abrasive particles and blades and improving grinding efficiency, in actual application, due to the action of centrifugal force, some abrasives will adhere to the barrel wall, affecting the polishing efficiency, and the abrasives are easy to splash out during polishing, causing waste. When the impeller rotates and grinds, the blades will continuously peel off the abrasives, which has the risk of deformation. For this purpose, an abrasive flow polishing device for the surface treatment of rocket engine impellers is provided to solve the above-mentioned problems. Summary of the Invention

[0005] In view of the problems in existing devices that, when polishing impellers, abrasives adhere to the barrel wall, reducing grinding efficiency, abrasives are easily splashed out and wasteful, and there is a risk of deformation of the impeller during rotational grinding, the present invention provides an abrasive flow polishing device for surface treatment of rocket engine impellers. By continuously oscillating the impeller up and down, instead of traditional rotational grinding, the abrasives can be prevented from adhering to the barrel wall to improve grinding efficiency, and the abrasives can be prevented from splashing out and causing waste, and the impeller can be prevented from deformation, etc., effectively solving the problems mentioned in the above-mentioned background technology.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is:

[0007] An abrasive flow polishing device for surface treatment of rocket engine impellers comprises a polishing table, an installation box capable of moving up and down is provided on the polishing table, a main shaft is provided inside the installation box, a clamp for fixing the impeller is provided at the lower end of the main shaft, a rotatable drive shaft is also provided inside the installation box, a polishing barrel is provided on the inner wall of the polishing table, abrasive is contained in the polishing barrel, and a pressure cover that cooperates with the polishing barrel is provided at the lower end of the installation box; when the installation box moves downward to a specified position, the impeller can enter the polishing barrel and contact the abrasive, and the pressure cover can seal the upper port of the polishing barrel. At this time, when the drive shaft rotates, the impeller can rotate intermittently while oscillating up and down.

[0008] Multi-stage telescopic rods are respectively provided on both sides of the upper end of the polishing table, and the mounting box is fixedly connected to the telescopic ends of the two multi-stage telescopic rods.

[0009] The clamp includes a clamping seat fixedly connected to the main shaft, a fixed clamping plate is installed on the inner wall of the lower end of the clamping seat, a plurality of clamping plates are provided on the fixed clamping plate, and a rotatable driving plate is provided on the inner wall of the middle part of the clamping seat. When the driving plate rotates, the plurality of clamping plates can be moved inward or outward synchronously.

[0010] A driving telescopic rod is provided inside the clamp seat, one end of the driving telescopic rod is hinged to the inner wall of the clamp seat, and the other end of the driving telescopic rod is hinged to the driving disk; the clamping plates are respectively slidably connected to the inner walls of the fixed clamping disk, and the clamping plates are respectively fixed with extension pins, and the driving disk is provided with a plurality of oblique key slots that match the extension pins.

[0011] The outer surface of the main shaft is rotatably connected to a connecting seat that is slidably connected to the installation box, the upper end of the installation box is fixedly connected to a motor, the drive shaft is fixedly connected to the output end of the motor, the upper end of the outer surface of the drive shaft is fixedly connected to a shift rod, the outer surface of the main shaft is also slidably connected to a groove wheel that cooperates with the shift rod, and the outer surface of the drive shaft is also fixedly connected to a lock wheel that cooperates with the groove wheel.

[0012] A plurality of first telescopic rods are provided at the lower end of the installation box, and a pressure cover is installed on the telescopic ends of the plurality of first telescopic rods; a plurality of long guide rods slidably connected to the installation box are fixedly connected to the pressure cover, a top ring is fixedly connected to the upper end of the plurality of long guide rods, a driving ring slidably connected to the driving shaft is rotatably connected to the top ring, a concave balance wheel is hinged on the driving shaft, a ball pin matching the concave balance wheel is fixed on the connecting seat, a small connecting rod is provided between the driving ring and the concave balance wheel, one end of the small connecting rod is hinged on the driving ring, and the other end of the small connecting rod is hinged on the concave balance wheel.

[0013] The first telescopic rods include an inner rod and an outer tube. The outer tubes are fixed to the installation box, the inner rods are fixed to the pressure cover, and the inner rods are slidably connected to the inner wall of the outer tube. The outer tubes are respectively provided with first springs that match the inner rods.

[0014] The inner wall of the middle part of the pressure cover is rotatably connected to a cylindrical seat, and the upper end of the outer surface of the cylindrical seat is fixedly connected to an outer ring, and a ratchet is hinged on the outer ring. The outer ring is also provided with an elastic sheet that cooperates with the ratchet. The upper end surface of the pressure cover is rotatably connected to a double-sided gear, and an inner ratchet that cooperates with the ratchet is provided on the inner side of the double-sided gear. The pressure cover is also slidably connected to a spur rack, and a spur gear that meshes with the spur rack is provided on the outer side of the double-sided gear. A first connecting rod is provided at the lower end of the mounting box, one end of the first connecting rod is hinged on the spur rack, and the other end of the first connecting rod is hinged to the lower end surface of the mounting box, and a plurality of scrapers that cooperate with the pressure cover are fixed to the lower end of the outer surface of the cylindrical seat.

[0015] The upper surface of the polishing table is slidably connected to sealing covers that match the polishing barrel on both sides, the front and rear end surfaces of the sealing covers are fixedly connected to first guide rails, the front and rear end surfaces of the mounting box are fixedly connected to long pins on the left and right sides, and the first guide rails are respectively provided with a first oblique groove and a first vertical groove that match the long pins.

[0016] The lower end of the polishing table is equipped with a support plate that can move up and down, and a plurality of rollers are provided on the support plate. The polishing barrel is placed on the rollers. Two clamping rods inclined inwardly are hinged on the left and right sides of the upper end surface of the support plate. Two square sliders are also slidably connected on the left and right sides of the upper end surface of the support plate. Short connecting rods that cooperate with the clamping rods are respectively provided on the square sliders. A second sliding pin is fixed on the inner end surface of the two square sliders. Second guide rails are fixed on the left and right sides of the lower end surface of the polishing table. The second guide rails are respectively provided with a second vertical groove and a second oblique groove that cooperate with the second sliding pin.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] When the present invention is in use, the impeller can be fixed or disassembled by means of the provided clamp, and when the main shaft rotates or moves up and down, the clamp and the impeller can be driven to rotate or move up and down; when the mounting box and the impeller move downward, the impeller can enter the polishing barrel and contact the abrasive; when the pressure cover moves downward, the pressure cover can move downward to contact the upper end surface of the polishing barrel, thereby sealing the upper port of the polishing barrel, preventing the abrasive from splashing out and causing waste when polishing the impeller; when the mounting box moves downward to the specified position, the drive shaft at this time starts to work, that is, the rotation of the drive shaft can make the impeller The wheel edge rotates intermittently while oscillating up and down. When the impeller oscillates up and down, it can fully contact the abrasive, thereby polishing the outer surface of the impeller. The up and down oscillating movement replaces the traditional rotary polishing and prevents the blades from peeling off the abrasive and deforming. The intermittent rotation of the impeller prevents the abrasive from sticking to the polishing barrel under the action of centrifugal force, and the risk of blade deformation is reduced during intermittent rotation. The intermittent circular motion of the blades can continuously change the position of the impeller blades, so that the blades evenly contact the abrasive at different positions, thereby improving the polishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an axonometric view of an abrasive flow polishing device for surface treatment of a rocket engine impeller according to the present invention.

[0020] Figure 2 The present invention is a cross-sectional view of an installation box of an abrasive flow polishing device for surface treatment of a rocket engine impeller.

[0021] Figure 3 The present invention is a schematic diagram of the installation of a gland of an abrasive flow polishing device for surface treatment of a rocket engine impeller.

[0022] Figure 4 The figure is a schematic diagram of the fixture structure of an abrasive flow polishing device for surface treatment of a rocket engine impeller according to the present invention.

[0023] Figure 5 The present invention is a cross-sectional view of a clamping seat of an abrasive flow polishing device for surface treatment of a rocket engine impeller.

[0024] Figure 6 This is a schematic diagram of the installation of a drive disc of an abrasive flow polishing device for surface treatment of a rocket engine impeller according to the present invention.

[0025] Figure 7 The figure is a schematic diagram of the main shaft installation of an abrasive flow polishing device for surface treatment of a rocket engine impeller according to the present invention.

[0026] Figure 8 This is a schematic diagram of the installation of a grooved wheel of an abrasive flow polishing device for surface treatment of a rocket engine impeller according to the present invention.

[0027] Figure 9 This is a schematic diagram of the installation of a concave balance wheel of an abrasive flow polishing device for surface treatment of a rocket engine impeller according to the present invention.

[0028] Figure 10 The figure is a schematic diagram of the installation of a spur rack of an abrasive flow polishing device for surface treatment of a rocket engine impeller according to the present invention.

[0029] Figure 11 This is a schematic diagram of the installation of a scraper in an abrasive flow polishing device for surface treatment of a rocket engine impeller according to the present invention.

[0030] Figure 12 This is a schematic diagram of the installation of a sealing cover of an abrasive flow polishing device for surface treatment of a rocket engine impeller according to the present invention.

[0031] Figure 13 The present invention is a cross-sectional view of a polishing table of an abrasive flow polishing device for surface treatment of a rocket engine impeller.

[0032] Figure 14The present invention is a schematic diagram of the installation of a clamping rod of an abrasive flow polishing device for surface treatment of a rocket engine impeller.

[0033] Figure 15 This is a schematic diagram of the installation of the second sliding pin of an abrasive flow polishing device for surface treatment of a rocket engine impeller of the present invention.

[0034] Numbers in the figure: 1-polishing table, 2-multi-stage telescopic rod, 3-extension seat, 4-installation box, 5-spindle, 6-impeller, 7-clamp seat, 8-fixed clamping plate, 9-clamping plate, 10-extension pin, 11-driving plate, 12-oblique keyway, 13-driving telescopic rod, 14-motor, 15-lock wheel, 16-grooved wheel, 17-shift rod, 18-driving shaft, 19-long guide rod, 20-top ring, 21-driving ring, 22-small connecting rod, 23-concave balance wheel, 24-ball pin, 25-connecting seat, 26-pressure cover, 27-outer cylinder, 28-first spring, 2 9-inner rod, 30-first connecting rod, 31-spur rack, 32-double-sided gear, 33-ratchet, 34-elastic sheet, 35-cylinder seat, 36-outer ring, 37-scraper, 38-long pin, 39-first guide rail, 40-sealing cover, 41-first inclined groove, 42-first vertical groove, 43-polishing barrel, 44-second telescopic rod, 45-support plate, 46-roller, 47-clamping rod, 48-square slider, 49-short connecting rod, 50-second guide rail, 51-second sliding pin, 52-second vertical groove, 53-second inclined groove, 54-first telescopic rod. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0036] like Figures 1-15 As shown, the present invention provides an abrasive flow polishing device for surface treatment of rocket engine impellers, comprising a polishing table 1, wherein the polishing table 1 is provided with an installation box 4 that can move up and down, a main shaft 5 is provided inside the installation box 4, and a clamp for fixing the impeller 6 is provided at the lower end of the main shaft 5, and a rotatable drive shaft 18 is also provided inside the installation box 4. A polishing barrel 43 is provided on the inner wall of the polishing table 1, and abrasives are contained in the polishing barrel 43. A pressure cover 26 that cooperates with the polishing barrel 43 is provided at the lower end of the installation box 4; when the installation box 4 moves downward to a specified position, the impeller 6 can enter the polishing barrel 43 and contact with the abrasive, and the pressure cover 26 can seal the upper port of the polishing barrel 43. At this time, when the drive shaft 18 rotates, the impeller 6 can intermittently rotate and oscillate up and down.

[0037] like Figures 1-13As shown, a plurality of supporting legs are provided at the four end corners of the lower end of the polishing table 1, and the supporting legs and the polishing table 1 are used to support the entire device; the mounting box 4 is used to install and support components such as the main shaft 5 and the drive shaft 18, the clamp is fixedly connected to the lower end of the main shaft 5, and the impeller 6 is mounted on the clamp, and the impeller 6 can be fixed or removed by the provided clamp, and when the main shaft 5 rotates or moves up and down, the clamp and the impeller 6 can be driven to rotate or move up and down; the polishing barrel 43 is installed in the middle of the polishing table 1, that is, the polishing barrel 43 is located directly below the mounting box 4 and the impeller 6, and when the mounting box 4 and the impeller 6 move downward, the impeller 6 can enter the polishing barrel 43 and contact the abrasive; through the provided pressure cover 26, when the mounting box 4 and the pressure cover 26 move downward, the pressure cover 26 can move downward to contact the upper end surface of the polishing barrel 43, thereby The upper port of 43 is sealed to prevent the abrasive from splashing out and causing waste when polishing the impeller 6; when the installation box 4 moves downward to the specified position, the drive shaft 18 starts working, that is, the rotation of the drive shaft 18 can make the impeller 6 rotate intermittently while oscillating up and down. When the impeller 6 oscillates up and down, it can fully contact with the abrasive, thereby polishing the outer surface of the impeller 6. The up and down oscillating movement replaces the traditional rotary polishing and prevents the blades from peeling off the abrasive and deforming; the intermittent rotation of the impeller 6 will prevent the abrasive from sticking to the polishing barrel 43 under the action of centrifugal force, and the risk of blade deformation can be reduced during intermittent rotation, and the intermittent circular motion of the blades can continuously change the position of the impeller 6, so that the blades evenly contact the abrasive at different positions, thereby improving the polishing efficiency.

[0038] Multi-stage telescopic rods 2 are respectively provided on both sides of the upper end of the polishing table 1 , and the mounting box 4 is fixedly connected to the telescopic ends of the two multi-stage telescopic rods 2 .

[0039] like Figure 1-Figure 2 As shown, the bottom of the multi-stage telescopic rod 2 is fixed to the upper surface of the polishing table 1, and the extension seats 3 are fixed on both sides of the installation box 4. The extension seats 3 are respectively fixed to the telescopic ends of the corresponding multi-stage telescopic rods 2, that is, the installation box 4 is fixed to the telescopic ends of the two multi-stage telescopic rods 2. When the multi-stage telescopic rod 2 is extended and retracted up and down, it can drive the extension seat 3 and the installation box 4 to move up and down, thereby controlling the installation box 4 to move to the specified position. The multi-stage telescopic rod 2 is a prior art and will not be described in detail.

[0040] The clamp includes a clamping seat 7 fixedly connected to the main shaft 5, a fixed clamping plate 8 is installed on the inner wall of the lower end of the clamping seat 7, a plurality of clamping plates 9 are provided on the fixed clamping plate 8, and a rotatable driving plate 11 is provided on the inner wall of the middle part of the clamping seat 7. When the driving plate 11 rotates, the plurality of clamping plates 9 can be moved synchronously inward or outward.

[0041] like Figure 4-Figure 6As shown, the clamp seat 7 is fixedly connected to the lower end surface of the main shaft 5, and the clamp seat 7 is used to install components such as the fixed clamping plate 8 and the driving plate 11. The fixed clamping plate 8 is fixedly connected to the inner wall of the clamp seat 7, and the driving plate 11 is rotatably connected to the inner wall of the clamp seat 7. When the driving plate 11 rotates, it can control multiple clamps 9 to move synchronously inward or outward. When the clamps 9 move inward, the impeller 6 can be clamped and fixed. When the clamps 9 move outward, they can be separated from the impeller 6, that is, the impeller 6 can be disassembled and replaced.

[0042] A driving telescopic rod 13 is provided inside the clamping seat 7, one end of the driving telescopic rod 13 is hinged to the inner wall of the clamping seat 7, and the other end of the driving telescopic rod 13 is hinged to the driving disk 11; the clamping plates 9 are respectively slidably connected to the inner walls of the fixed clamping plates 8, and the clamping plates 9 are respectively fixed with extension pins 10, and the driving disk 11 is provided with a plurality of oblique key slots 12 that cooperate with the extension pins 10.

[0043] like Figure 5-Figure 6 As shown, when the driving telescopic rod 13 is extended and retracted, the driving disk 11 can be driven to rotate. The driving telescopic rod 13 can be provided with one or more. The driving telescopic rod 13 can be an electric rod. The driving telescopic rod 13 is a prior art and will not be described in detail. Figure 5 As shown, the clamping plate 9 can slide inward or outward on the inner wall of the fixed clamping plate 8. A plurality of long key holes are provided on the fixed clamping plate 8, and the extension pins 10 are respectively installed in the corresponding long key holes, so that the extension pins 10 and the clamping plate 9 can move synchronously inward or outward on the fixed clamping plate 8; through the engagement of the oblique key groove 12 with the extension pin 10, when the driving plate 11 rotates, the extension pin 10 and the clamping plate 9 can be driven to move synchronously inward or outward, thereby achieving the clamping, fixation or loosening of the impeller 6.

[0044] The outer surface of the main shaft 5 is rotatably connected to a connecting seat 25 that is slidably connected to the installation box 4. The upper end of the installation box 4 is fixedly connected to the motor 14. The drive shaft 18 is fixedly connected to the output end of the motor 14. The upper end of the outer surface of the drive shaft 18 is fixedly connected to a shift rod 17. The outer surface of the main shaft 5 is also slidably connected to a groove wheel 16 that cooperates with the shift rod 17. The outer surface of the drive shaft 18 is also fixedly connected to a lock wheel 15 that cooperates with the groove wheel 16.

[0045] like Figure 7-Figure 8As shown, the main shaft 5 passes through the inner walls of the upper and lower ends of the installation box 4, that is, the main shaft 5 can move up and down and rotate on the inner wall of the installation box 4, and the connecting seat 25 can be slidably connected to the inner wall of the installation box 4 up and down. The connecting seat 25 plays a supporting role in limiting the main shaft 5, so that the main shaft 5 can move up and down and rotate. The connecting seat 25 can move up and down and can be in a specified position under normal conditions. When the connecting seat 25 moves up and down, it can drive the main shaft 5 to move up and down. When the connecting seat 25 is in a specified position, it can provide stable support for the main shaft 5; the function of the motor 14 is to provide a rotating force for the drive shaft 18. The motor 14 is a prior art and will not be described in detail. The drive shaft 18 is rotatably connected to the inner wall of the installation box 4. When the motor 14 is started to rotate the drive shaft 18, it can drive the lock When the sheave 16 and the main shaft 5 are intermittently stopped, the sheave 16 can be locked, that is, the main shaft 5 and the impeller 6 are in a stable state.

[0046] The lower end of the installation box 4 is provided with multiple first telescopic rods 54, and the pressure cover 26 is installed on the telescopic ends of the multiple first telescopic rods 54; the pressure cover 26 is fixed with multiple long guide rods 19 that are slidably connected to the installation box 4, and the upper ends of the multiple long guide rods 19 are fixed with a top ring 20, and the top ring 20 is rotatably connected to a drive ring 21 that is slidably connected to the drive shaft 18, and a concave balance wheel 23 is hinged on the drive shaft 18, and a ball pin 24 that cooperates with the concave balance wheel 23 is fixed on the connecting seat 25. A small connecting rod 22 is provided between the drive ring 21 and the concave balance wheel 23, and one end of the small connecting rod 22 is hinged on the drive ring 21, and the other end of the small connecting rod 22 is hinged on the concave balance wheel 23.

[0047] like Figure 2 、 Figure 9As shown, two or more first telescopic rods 54 can be provided, and the first telescopic rods 54 can be extended and retracted up and down, so that the pressure cover 26 can only move up and down at the lower end of the installation box 4. The first telescopic rod 54 is in an extended state under normal conditions, even if the pressure cover 26 is in the lowest position under normal conditions; two or more long guide rods 19 can be provided, and the long guide rods 19 pass through the lower end surface of the installation box 4 and can move up and down on the inner wall of the installation box 4. When the pressure cover 26 moves up and down, it can drive the long guide rods 19, the top ring 20, and the drive ring 21 to move up and down; the drive ring 21 and the drive shaft 18 are spline-connected, and the drive ring 21 is slidably connected to the outer surface of the drive shaft 18 up and down, and when the drive shaft 18 rotates, the drive ring 21 can rotate with the drive shaft 18, so that the drive ring 21 and the concave balance wheel 23 always keep in sync; the installation and shape of the concave balance wheel 23, the small connecting rod 22, and the ball pin 24 are as shown in FIG. Figure 9As shown, the concave balance wheel 23 is hingedly mounted on the drive shaft 18 via a hinge shaft. When the drive shaft 18 rotates, the concave balance wheel 23 can be driven to rotate, and the concave balance wheel 23 can also deflect and swing on the outer surface of the drive shaft 18. When the concave balance wheel 23 is in a horizontal position, the concave balance wheel 23 rotates with the drive shaft 18. Due to the meshing with the ball pin 24, the ball pin 24 and the connecting seat 25 will not move up and down. When the concave balance wheel 23 deflects, when the concave balance wheel 23 rotates with the drive shaft 18, due to the meshing with the ball pin 24, the ball pin 24 and the connecting seat 25 can be reciprocated and oscillated up and down, and the size of the up and down reciprocating movement is related to the deflection angle of the concave balance wheel 23. When the installation box 4 moves downward, it can drive the pressure cover 26, the fixture, impeller 6, etc. move downward synchronously. When the impeller 6 moves downward to the specified position, that is, the impeller 6 enters the polishing barrel 43 and contacts the abrasive, the pressure cover 26 can move downward to contact the upper end surface of the polishing barrel 43. The pressure cover 26 no longer moves downward under the obstruction of the polishing barrel 43, that is, the corresponding long guide rod 19, top ring 20, and drive ring 21 no longer move downward. At this time, the installation box 4, drive shaft 18, concave balance wheel 23, small connecting rod 22, etc. continue to move downward, and the impeller 6 can enter the abrasive, and will squeeze the first telescopic rod 54 to shrink and shorten. When the drive shaft 18, concave balance wheel 23, small connecting rod 22, etc. move downward, since one end of the small connecting rod 22 is hinged on the drive ring 21, the drive ring 21 is in the long The guide rod 19 and the top ring 20 block the concave balance wheel 23 and the concave balance wheel 23. The concave balance wheel 23 is blocked by the guide rod 19 and the top ring 20 and no longer moves downward. Therefore, the concave balance wheel 23 can deflect downward. When the concave balance wheel 23 deflects downward, the ball pin 24, the connecting seat 25 and the main shaft 5 can be driven to continue to move downward, that is, the impeller 6 is accelerated to move downward, so that the impeller 6 completely enters the abrasive, that is, the abrasive completely covers the impeller 6. At this time, when the drive shaft 18 rotates, the main shaft 5 and the impeller 6 can be driven to rotate intermittently, and the deflected concave balance wheel 23 can be driven to rotate. When the concave balance wheel 23 rotates, it can drive the ball pin 24, the connecting seat 25, the main shaft 5 and the impeller 6 to oscillate back and forth through the engagement with the ball pin 24, so that the impeller 6 is fully in contact with the abrasive and the impeller 6 is polished. After polishing is completed, when the mounting box 4 is controlled to move upward and reset, the impeller 6 moves upward and can be separated from the polishing barrel 43, and the pressure cover 26 moves upward and can be separated from the polishing barrel 43. Under the elastic force of the first spring 28 inside the first telescopic rod 54, the pressure cover 26 can be moved downward and reset, that is, the pressure cover 26 moves and resets to the lowermost position of the mounting box 4 again. At this time, the corresponding concave balance wheel 23 can be flipped and reset to the horizontal state again; when polishing impellers 6 of different heights, by controlling the mounting box 4 to move downward to the corresponding designated position, the deflection angle of the corresponding concave balance wheel 23 will also change accordingly, so that the device can automatically adjust the stroke size of the reciprocating up and down oscillation movement according to the height of the impeller 6;That is, when the impeller 6 is at a greater height, the mounting box 4 is controlled to move downward to a lower position. At this time, the deflection angle of the concave balance wheel 23 is greater, and the reciprocating stroke of the impeller 6 is increased, so that the impeller 6 is in full contact with the abrasive, further improving the polishing effect. Similarly, when the impeller 6 is at a lower height, the mounting box 4 is controlled to move downward to a higher position. At this time, the deflection angle of the concave balance wheel 23 is smaller, and the reciprocating stroke of the impeller 6 is reduced. When the device is moved downward to a specified position according to the height of the impeller 6, the corresponding stroke of the impeller 6 during the up and down movement can be changed, and the reciprocating stroke size automatically adapts to the height of the impeller 6.

[0048] The first telescopic rod 54 includes an inner rod 29 and an outer tube 27. The outer tube 27 is fixed to the installation box 4, and the inner rod 29 is fixed to the pressure cover 26. The inner rod 29 is slidably connected to the inner wall of the outer tube 27. The outer tube 27 is provided with a first spring 28 that cooperates with the inner rod 29.

[0049] like Figure 10 As shown, the inner rod 29 is connected to the inner wall of the outer cylinder 27 and can slide up and down. The first spring 28 always has a downward driving force on the inner rod 29, so that the inner rod 29 is at the bottom position under normal conditions, even if the pressure cover 26 is at the bottom position of the installation box 4 under normal conditions.

[0050] The inner wall of the middle part of the pressure cover 26 is rotatably connected to a cylindrical seat 35, and the upper end of the outer surface of the cylindrical seat 35 is fixedly connected to an outer ring 36, and a ratchet 33 is hinged on the outer ring 36, and an elastic sheet 34 that cooperates with the ratchet 33 is also provided on the outer ring 36. The upper end surface of the pressure cover 26 is rotatably connected to a double-sided gear 32, and an inner ratchet that cooperates with the ratchet 33 is provided on the inner side of the double-sided gear 32. A spur rack 31 is also slidably connected to the pressure cover 26, and a spur gear that meshes with the spur rack 31 is provided on the outer side of the double-sided gear 32. A first connecting rod 30 is provided at the lower end of the installation box 4, and one end of the first connecting rod 30 is hinged on the spur rack 31, and the other end of the first connecting rod 30 is hinged to the lower end surface of the installation box 4. A plurality of scrapers 37 that cooperate with the pressure cover 26 are fixedly connected to the lower end of the outer surface of the cylindrical seat 35.

[0051] like Figure 10-11 As shown, the straight rack 31 can slide left and right on the upper end surface of the pressure cover 26, the cylindrical seat 35 passes through the pressure cover 26 and is rotatably connected to the inner wall of the pressure cover 26; the scraper 37 is provided on the lower end surface of the pressure cover 26, the double-sided gear 32 can rotate on the upper end surface of the pressure cover 26, and the installation and shape of the double-sided gear 32, the ratchet 33, the cylindrical seat 35, the outer ring 36, and the elastic sheet 34 are as shown. Figure 11As shown, the elastic piece 34 always has an outward elastic force on the ratchet 33, which can make the ratchet 33 always mesh with the inner ratchet. The elastic piece 34 and the ratchet 33 can be provided in one or more groups. Under the mutual cooperation of the double-sided gear 32 and the ratchet 33, when the spur rack 31 moves to the right, the spur rack 31 can drive the double-sided gear 32 to rotate in the opposite direction under the meshing with the spur gear. When the double-sided gear 32 rotates in the opposite direction, the inner ratchet can slide relative to the ratchet 33, that is, the corresponding inner ratchet will not drive the ratchet 33, the outer ring 36, and the cylindrical seat 35 to rotate. When the rack 31 moves to the left, the engagement of the spur rack 31 with the spur gear can drive the double-sided gear 32 to rotate forward. At this time, the inner ratchet can toggle the ratchet 33 to move in a circular motion, and the outer ring 36 and the cylindrical seat 35 rotate. When the cylindrical seat 35 rotates, it can drive the scraper 37 to move in a circular motion. When in use, when the installation box 4 and the pressure cover 26 move downward synchronously, the first connecting rod 30 can move downward synchronously with the installation box 4 and the pressure cover 26. When the pressure cover 26 moves downward and contacts the polishing barrel 43, the pressure cover 26, the spur rack 31, etc. will no longer move downward. When the mounting box 4 moves upward, the pressure cover 26 can seal the upper port of the polishing barrel 43. The mounting box 4 continues to move downward to squeeze the first connecting rod 30 to tilt downward. When the first connecting rod 30 tilts downward, it can drive the straight rack 31 to move to the right. When the straight rack 31 moves to the left, it will not drive the scraper 37 to rotate. After the impeller 6 is polished, that is, when the mounting box 4 moves upward to reset, the pressure cover 26 can still maintain contact with the polishing barrel 43 for a period of time under the elastic force of the first spring 28. When the mounting box 4 moves upward to reset, it can drive the first connecting rod 30 to move upward again. Reset, at this time the spur rack 31 can move to the left, and when the spur rack 31 moves to the left, it can drive the scraper 37 to move in a circle. When the scraper 37 moves in a circle, it can remove the abrasive adhering to the lower end surface of the pressure cover 26, that is, the abrasive falls back into the polishing barrel 43 under the action of gravity. When polishing the impeller 6, it is inevitable that the abrasive will splash. When the abrasive splashes and adheres to the lower end surface of the pressure cover 26, the scraper 37 is set, and the abrasive at the lower end of the pressure cover 26 can be scraped off when resetting, so that the abrasive falls back into the polishing barrel 43 again, saving abrasive costs and reducing waste.

[0052] The upper end surface of the polishing table 1 is slidably connected to sealing covers 40 that cooperate with the polishing barrel 43. The front and rear end surfaces of the sealing cover 40 are fixed with first guide rails 39 respectively. The front and rear end surfaces of the mounting box 4 are fixed with long pins 38 on the left and right sides respectively. The first guide rails 39 are respectively provided with a first inclined groove 41 and a first vertical groove 42 that cooperate with the long pin 38.

[0053] like Figure 12As shown, the sealing cover 40 is used to seal the polishing barrel 43, so that the abrasive can be sealed and stored under normal conditions to prevent external impurities from entering and contaminating the abrasive. The sealing cover 40 can be slidably connected to the upper end surface of the polishing table 1; the installation and shape of the long pin 38, the first guide rail 39, the first inclined groove 41, and the first vertical groove 42 are as shown. Figure 12 As shown, when the installation box 4 and the long pin 38 move downward, the long pin 38 is engaged with the first inclined groove 41, and the first guide rail 39 and the sealing cover 40 can be moved outward. When the sealing cover 40 moves outward, the polishing barrel 43 can be opened. When the installation box 4 moves downward so that the long pin 38 enters the inner wall of the first vertical groove 42, the two sealing covers 40 can be moved outward to the top position, that is, the corresponding polishing barrel 43 can be fully opened. When the installation box 4 and the long pin 38 continue to move downward, the sealing cover 40 no longer moves under the engagement of the long pin 38 with the first vertical groove 42, and the impeller 6 can enter the polishing barrel 43 at this time; after the polishing of the impeller 6 is completed, when the installation box 4, the long pin 38, etc. move upward to reset, the corresponding two sealing covers 40 can move inward to reset under the engagement of the long pin 38 with the first inclined groove 41, that is, the polishing barrel 43 is sealed again.

[0054] The lower end of the polishing table 1 is equipped with a support plate 45 that can move up and down. The support plate 45 is provided with multiple rollers 46. The polishing barrel 43 is placed on the rollers 46. Two clamping rods 47 tilted inwardly are hinged on the left and right sides of the upper end surface of the support plate 45. Two square sliders 48 are also slidably connected on the left and right sides of the upper end surface of the support plate 45. Short connecting rods 49 that cooperate with the clamping rods 47 are respectively provided on the square sliders 48. A second sliding pin 51 is fixed to the inner end surface of the two square sliders 48. Second guide rails 50 are fixed on the left and right sides of the lower end surface of the polishing table 1. The second guide rails 50 are respectively provided with a second vertical groove 52 and a second inclined groove 53 that cooperate with the second sliding pin 51.

[0055] like Figure 13-15 As shown, second telescopic rods 44 are fixed on the left and right sides of the lower end surface of the polishing table 1, and support plates 45 are fixed to the lower end surfaces of the two second telescopic rods 44. When the second telescopic rods 44 are extended and retracted up and down, the support plates 45 can be driven to move up and down. The second telescopic rods 44 can be an electric rod; the support plates 45 support and fix the polishing barrel 43, and when the support plates 45 move downward, the polishing barrel 43 can be disassembled for regular replacement of abrasives; a positioning hole is provided in the middle of the polishing table 1, and the polishing barrel 43 can be inserted into the positioning hole under normal conditions to limit and fix the polishing barrel 43; the roller 46 is rotatably connected to the inner wall of the support plate 45, and through the provided roller 46, the friction between the polishing barrel 43 and the support plate 45 can be reduced when the polishing barrel 43 moves back and forth on the support plate 45; the installation and shape of the clamping rod 47, the square slider 48, and the short connecting rod 49 are as shown in the figure Figure 14As shown, the square slider 48 can slide left and right on the upper surface of the support plate 45, one end of the short connecting rod 49 is hinged on the square slider 48, and the other end of the short connecting rod 49 is hinged on the clamping rod 47. When the square sliders 48 at the left and right ends move outward, the corresponding clamping rod 47 can be opened outward through the hinge of the short connecting rod 49. Similarly, when the square slider 48 moves inward, the clamping rod 47 can be closed inward; the installation and shape of the second guide rail 50, the square slider 48, the second sliding pin 51, the second vertical slot 52 and the second inclined slot 53 are as shown Figure 15 As shown, when the supporting plate 45, the square slider 48, the second sliding pin 51, etc. move downward, the second sliding pin 51 can keep moving vertically downward under the engagement of the second vertical groove 52. When the supporting plate 45 continues to move downward so that the second sliding pin 51 enters the inner wall of the second inclined groove 53, the supporting plate 45 continues to move downward, and the second sliding pin 51 moves downward and outward under the engagement of the second inclined groove 53, that is, the corresponding square slider 48 moves downward and outward, and when the square slider 48 moves outward, it can drive the clamping rod 47 to open outward. When the abrasive in 43 is replaced, the second telescopic rod 44 is activated to move the support plate 45 downward. When the support plate 45 moves downward, the polishing barrel 43 can move downward accordingly under the action of gravity. When the polishing barrel 43 moves downward and is completely separated from the positioning hole, the first sliding pin can move downward to enter the inner wall of the second inclined groove 53. When the support plate 45 continues to move downward, the second sliding pin 51 can move outward to open the clamping rod 47 outward. When the support plate 45 continues to move downward to the bottom position, the second sliding pin 51 and the square slider 48 can move outward to open the clamping rod 47 outward. When the two clamping rods 47 are opened to the maximum, that is, the two clamping rods 47 are in a collinear state, that is, the clamping rods 47 no longer clamp and position the polishing barrel 43, and the polishing barrel 43 can be removed to replace the abrasive; after replacing the abrasive, the polishing barrel 43 is placed on the supporting plate 45 again, and the supporting plate 45 is controlled to move upward. When the supporting plate 45 moves upward, the second sliding pin 51 and the square slider 48 can be moved inward by the engagement of the second sliding pin 51 and the second inclined groove 53. When the square slider 48 moves inward, it can drive the two clamping rods 47 to close inward. When the clamping rods 47 are closed inward, When closing, it can clamp the outer surface of the polishing barrel 43, that is, clamp and calibrate the polishing barrel 43. When the support plate 45 moves upward to make the second sliding pin 51 enter the inner wall of the second vertical groove 52, the clamping rod 47 closes inward to the innermost end position, that is, the polishing barrel 43 can be clamped, calibrated and fixed at a position directly below the positioning hole. When the support plate 45 continues to move upward, the polishing barrel 43 can be inserted into the positioning hole. The clamping rod 47 can be opened during unloading and closed during loading to clamp and calibrate the polishing barrel 43, thereby improving the efficiency of unloading and loading.

[0056] When the present invention is in use, the impeller 6 can be fixed or disassembled by the provided clamp. When the main shaft 5 rotates or moves up and down, the clamp and the impeller 6 can be driven to rotate or move up and down; when the mounting box 4 and the impeller 6 move downward, the impeller 6 can enter the polishing barrel 43 and contact the abrasive; when the pressure cover 26 moves downward, the pressure cover 26 can move downward to contact the upper end surface of the polishing barrel 43, thereby sealing the upper port of the polishing barrel 43, preventing the abrasive from splashing out and causing waste when polishing the impeller 6; when the mounting box 4 moves downward to the specified position, the drive shaft 18 starts working, that is, the drive shaft 1 8 The rotation can make the impeller 6 rotate intermittently while oscillating up and down. When the impeller 6 oscillates up and down, it can fully contact with the abrasive, thereby polishing and grinding the outer surface of the impeller 6. The up and down oscillating movement replaces the traditional rotary polishing and grinding to prevent the blades from peeling off the abrasive and deforming. The intermittent rotation of the impeller 6 will not cause the abrasive to adhere to the polishing barrel 43 under the action of centrifugal force, and the risk of blade deformation can be reduced during intermittent rotation. In addition, the intermittent circular motion of the blades can continuously change the position of the impeller 6, so that the blades evenly contact the abrasive at different positions, thereby improving the polishing efficiency.

Claims

1. An abrasive flow polishing device for surface treatment of a rocket engine impeller, comprising a polishing table (1), characterized in that: The polishing table (1) is provided with a mounting box (4) that can move up and down, a main shaft (5) is provided inside the mounting box (4), a fixture for fixing the impeller (6) is provided at the lower end of the main shaft (5), and a rotatable drive shaft (18) is also provided inside the mounting box (4). The inner wall of the polishing table (1) is provided with a polishing barrel (43), and abrasive is contained in the polishing barrel (43). The lower end of the mounting box (4) is provided with a pressure cover (26) that matches the polishing barrel (43); The outer surface of the main shaft (5) is rotatably connected to a connecting seat (25) that is slidably connected to the installation box (4), the upper end of the installation box (4) is fixedly connected to a motor (14), the drive shaft (18) is fixedly connected to the output end of the motor (14), the upper end of the outer surface of the drive shaft (18) is fixedly connected to a shifting rod (17), the outer surface of the main shaft (5) is also slidably connected to a groove wheel (16) that matches the shifting rod (17), and the outer surface of the drive shaft (18) is also fixedly connected to a lock wheel (15) that matches the groove wheel (16); The lower end of the installation box (4) is provided with a plurality of first telescopic rods (54), and a pressure cover (26) is installed on the telescopic ends of the plurality of first telescopic rods (54); a plurality of long guide rods (19) slidably connected to the installation box (4) are fixedly connected to the pressure cover (26); a top ring (20) is fixedly connected to the upper end of the plurality of long guide rods (19); a driving ring (21) slidably connected to the driving shaft (18) is rotatably connected to the top ring (20); a concave balance wheel (23) is hingedly connected to the driving shaft (18); a ball pin (24) matched with the concave balance wheel (23) is fixedly connected to the connecting seat (25); a small connecting rod (22) is provided between the driving ring (21) and the concave balance wheel (23); one end of the small connecting rod (22) is hingedly connected to the driving ring (21), and the other end of the small connecting rod (22) is hingedly connected to the concave balance wheel (23); When the mounting box (4) moves downward, the pressure cover (26), the fixture, and the impeller (6) can be driven to move downward synchronously, and the impeller (6) enters the polishing barrel (43) and contacts the abrasive. The pressure cover (26) can move downward to contact the upper end surface of the polishing barrel (43), thereby sealing the upper end of the polishing barrel (43). At this time, the mounting box (4), the drive shaft (18), the concave balance wheel (23), and the small connecting rod (22) continue to move downward, squeezing the first telescopic rod (54) to shrink and shorten. The drive ring (21) no longer moves downward under the obstruction of the long guide rod (19) and the top ring (20), so that the concave balance wheel (23) can deflect downward; at this time, when the drive shaft (18) rotates, the impeller (6) can be made to oscillate up and down while rotating intermittently.

2. The abrasive flow polishing device for surface treatment of a rocket engine impeller according to claim 1, characterized in that: Multi-stage telescopic rods (2) are respectively provided on both sides of the upper end of the polishing table (1), and the mounting box (4) is fixedly connected to the telescopic ends of the two multi-stage telescopic rods (2).

3. The abrasive flow polishing device for surface treatment of a rocket engine impeller according to claim 1, characterized in that: The clamp comprises a clamp seat (7) fixedly connected to the main shaft (5), a fixed clamping disc (8) is installed on the inner wall of the lower end of the clamp seat (7), a plurality of clamping plates (9) are provided on the fixed clamping disc (8), and a rotatable driving disc (11) is provided on the inner wall of the middle part of the clamp seat (7), and when the driving disc (11) rotates, the plurality of clamping plates (9) can be synchronously moved inward or outward.

4. The abrasive flow polishing device for surface treatment of a rocket engine impeller according to claim 3, characterized in that: A driving telescopic rod (13) is provided inside the clamp seat (7), one end of the driving telescopic rod (13) is hinged to the inner wall of the clamp seat (7), and the other end of the driving telescopic rod (13) is hinged to the driving disc (11); the clamping plates (9) are respectively slidably connected to the inner wall of the fixed clamping disc (8), and the clamping plates (9) are respectively fixed with extension pins (10), and the driving disc (11) is provided with a plurality of oblique key slots (12) that match the extension pins (10).

5. The abrasive flow polishing device for surface treatment of a rocket engine impeller according to claim 1, characterized in that: The first telescopic rod (54) comprises an inner rod (29) and an outer cylinder (27), the outer cylinder (27) being fixedly connected to the mounting box (4), the inner rod (29) being fixedly connected to the pressure cover (26), the inner rod (29) being slidably connected to the inner wall of the outer cylinder (27), and a first spring (28) cooperating with the inner rod (29) being provided inside the outer cylinder (27).

6. The abrasive flow polishing device for surface treatment of a rocket engine impeller according to claim 1, characterized in that: The inner wall of the middle part of the pressure cover (26) is rotatably connected to a cylindrical seat (35), the upper end of the outer surface of the cylindrical seat (35) is fixedly connected to an outer ring (36), a ratchet (33) is hinged on the outer ring (36), and an elastic sheet (34) is provided on the outer ring (36) to match the ratchet (33). The upper end surface of the pressure cover (26) is rotatably connected to a double-sided gear (32), and an inner ratchet is provided on the inner side of the double-sided gear (32) to match the ratchet (33). The cover (26) is also slidably connected to a spur rack (31), and a spur gear meshing with the spur rack (31) is provided on the outer side of the double-sided gear (32). A first connecting rod (30) is provided at the lower end of the mounting box (4), one end of the first connecting rod (30) is hinged on the spur rack (31), and the other end of the first connecting rod (30) is hinged on the lower end surface of the mounting box (4). A plurality of scrapers (37) that cooperate with the pressure cover (26) are fixed to the lower end of the outer surface of the cylindrical seat (35).

7. The abrasive flow polishing device for surface treatment of a rocket engine impeller according to claim 1, characterized in that: The upper end surface of the polishing table (1) is slidably connected to sealing covers (40) that match the polishing barrel (43), and the front and rear end surfaces of the sealing cover (40) are fixedly connected to first guide rails (39). The left and right sides of the front and rear end surfaces of the mounting box (4) are fixedly connected to long pins (38), and the first guide rails (39) are respectively provided with first inclined grooves (41) and first vertical grooves (42) that match the long pins (38).

8. The abrasive flow polishing device for surface treatment of a rocket engine impeller according to claim 1, characterized in that: The lower end of the polishing table (1) is provided with a supporting plate (45) capable of moving up and down, and a plurality of rollers (46) are provided on the supporting plate (45). The polishing barrel (43) is placed on the rollers (46). Two clamping rods (47) inclined inwardly are hinged on the left and right sides of the upper end surface of the supporting plate (45). Two square sliders (48) are also slidably connected to the left and right sides of the upper end surface of the supporting plate (45). Short connecting rods (49) matching with the clamping rods (47) are respectively provided on the square sliders (48). A second sliding pin (51) is fixed to the inner end surface of each of the two square sliders (48). Second guide rails (50) are fixed to the left and right sides of the lower end surface of the polishing table (1). A second vertical groove (52) and a second inclined groove (53) matching with the second sliding pin (51) are respectively opened on the second guide rail (50).

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