Positioning device for machining inner arc and outer arc of guide vane of steam turbine

Abstract

The positioning device comprises a machining table, a mounting plate is fixedly connected to the bottom of the inner wall of the machining table in a sliding mode, a positioning mechanism is arranged on one side of the machining table, and the positioning mechanism comprises a positioning buzzer, a guide blade body, a guide blade shaft, a movable frame, a sleeve, an auxiliary supporting plate and a clamping groove. Two positioning buzzers are fixedly mounted in the middle of one side of the fixing block, and a movable frame is fixedly mounted at the top of the mounting plate. Through structures such as a positioning mechanism, an electric push rod, a vertical plate, a transverse plate, a connecting plate and a mounting plate, the electric push rod is started to drive the vertical plate to move, the transverse plate and the connecting plate drive the mounting plate to move, a guide blade body in the positioning mechanism is driven to extrude a positioning buzzer, and at the moment, the guide blade body needing to be machined is movably positioned; and the inner arc and the outer arc of the guide blade body are better attached to the outer arc grinding plate and the inner arc grinding plate, and subsequent machining and grinding treatment is facilitated.

Description

Technical Field

[0001] The invention relates to the field of inner and outer arc processing of turbine guide blades, in particular to a positioning device used for inner and outer arc processing of turbine guide blades. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle to become an accelerated airflow and is then sprayed onto the blades, causing the rotor equipped with blade rows to rotate and perform work externally. Steam turbines are the main equipment in modern thermal power plants and are also used in the metallurgical industry, chemical industry, and ship power plants. At the same time, guide vanes need to be installed during steam turbine production, and the guide vanes are mainly guide elements installed between the rotor blades and the stator to control the direction and speed of the airflow. Guide vanes are divided into stationary blades and rotor blades. The stationary blades are fixed on the casing and do not move. Their main function is to convert high-speed airflow into low-speed airflow. The rotor blades are located on the rotor and are responsible for converting the kinetic energy of the airflow into mechanical energy. The inner and outer arcs of the guide vanes need to be processed before installation to prevent burrs or bumps on the inner and outer arcs, which increase the resistance of the airflow and reduce the performance of the guide vanes.

[0003] At present, guide vanes are processed during production. The existing guide vanes are mainly processed to remove burrs or convex particles on the inner and outer arcs. During the processing, the guide vanes are first clamped by a clamping tool and then polished by a polishing mechanism. However, the guide vanes are not positioned during the clamping process, which easily makes the guide vanes and the grinding plate not fit tightly, thereby affecting the processing efficiency. Therefore, a positioning device for inner and outer arc processing of turbine guide vanes is designed. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a positioning device for inner and outer arc processing of turbine guide vanes to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention proposes a positioning device for inner and outer arc processing of a turbine guide blade, comprising a processing table, a guide rod is fixedly installed on one side of the inner wall of the processing table, a fixing block is inserted and connected to the outer ring of the guide rod, a limit plate is fixedly installed on one end of the guide rod, and a mounting plate is fixedly and slidably connected to the bottom of the inner wall of the processing table; A positioning mechanism is provided on one side of the processing table, and the positioning mechanism includes a positioning buzzer, a guide vane body, a guide vane shaft, a movable frame, a sleeve, an auxiliary support plate and a slot. Two positioning buzzers are fixedly installed in the middle of one side of the fixed block, a movable frame is fixedly installed on the top of the mounting plate, an auxiliary support plate is slidably connected to the top of the movable frame, a slot is provided on one side of the auxiliary support plate, a sleeve is fixedly installed on one side of the movable frame, a guide vane shaft is sleeved on the inner wall of the sleeve, the other end of the guide vane shaft is connected to the inner wall of the slot, and a guide vane body is fixedly provided on the outer ring of the guide vane shaft.

[0006] In one example, an electric hydraulic rod is fixedly mounted on the top of the inner wall of the slot, an arc-shaped pressure plate is fixedly mounted on the output shaft of the electric hydraulic rod, and the arc-shaped pressure plate is engaged with the guide vane shaft.

[0007] In one example, a sheet metal mounting piece is fixedly mounted on the bottom of one side of the processing table, an electric push rod is fixedly mounted on one side of the sheet metal mounting piece, and a vertical plate is fixedly mounted on the output shaft of the electric push rod.

[0008] In one example, a transverse plate is fixedly mounted on the top of the vertical plate, two connecting plates are fixedly mounted on both sides of the top of the transverse plate, and the other ends of the two connecting plates are fixedly connected to the mounting plate.

[0009] In one example, a reciprocating motor is fixedly mounted on one side of the processing table, a lead screw is fixedly mounted on the output shaft of the reciprocating motor, and the lead screw penetrates and extends into the processing table.

[0010] In one example, the outer ring of the screw rod is threadedly connected to a fixing block, and an outer arc grinding plate is fixedly mounted on the top of one side of the fixing block.

[0011] In one example, a mounting groove is provided in the middle of one side of the fixing block, and mounting blocks are slidably connected to inner walls on both sides of the mounting groove.

[0012] In one example, an inner arc grinding plate is fixedly mounted on one side of the mounting block, a connecting spring is fixedly mounted on the top of the mounting block, and the top end of the connecting spring is fixedly connected to the top of the inner wall of the mounting groove.

[0013] In one example, a slide groove is provided on the top of the movable frame, and a threaded rod penetrating through and extending outside the movable frame is rotatably connected to one side of the inner wall of the slide groove.

[0014] In one example, the outer ring of the threaded rod is threadedly connected to a slider fixedly connected to the auxiliary support plate, and the other end of the threaded rod is fixedly mounted with a crank.

[0015] The positioning device for inner and outer arc processing of steam turbine guide blades proposed by the present invention can bring the following beneficial effects: 1. A positioning device for processing inner and outer arcs of a turbine guide blade, through a positioning mechanism, an electric push rod, a vertical plate, a horizontal plate, a connecting plate and a mounting plate. The electric push rod is started to drive the vertical plate to move, and the mounting plate is driven to move through the horizontal plate and the connecting plate, thereby driving the guide blade body in the positioning mechanism to be squeezed with the positioning buzzer. At this time, the guide blade body to be processed is moved and positioned, so that the inner and outer arcs of the guide blade body are better fitted with the outer arc grinding plate and the inner arc grinding plate, which is convenient for subsequent processing and grinding.

[0016] 2. This positioning device for processing the inner and outer arcs of the turbine guide vane starts a reciprocating motor to drive the screw to rotate, which drives the fixed block to move, and drives the outer arc grinding plate and the inner arc grinding plate to rub and grind the inner and outer arcs of the guide vane body to prevent burrs on the surface of the guide vane body from affecting subsequent use. The inner and outer arcs of the guide vane body are rubbed back and forth by the outer arc grinding plate and the inner arc grinding plate to make its surface smoother.

[0017] 3. A positioning device for processing inner and outer arcs of turbine guide vanes drives the outer arc grinding plate and the inner arc grinding plate to rub the inner and outer arcs of the guide vane body through a fixed block to make its surface smoother. At the same time, the fixed block moves back and forth on the guide rod. When the fixed block moves the limit plate to fit, the reciprocating motor reverses and the fixed block returns, which drives the outer arc grinding plate and the inner arc grinding plate to rub back and forth with the inner and outer arcs of the guide vane body, and grinds the burrs or convex particles on the inner and outer arc surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the fixed block of the present invention; Figure 3 This is a schematic diagram of the installation block structure of the present invention; Figure 4 It is a schematic diagram of the arc-shaped clamping plate structure of the present invention.

[0019] Figure 5 It is a schematic diagram of the structure of the mobile rack of the present invention.

[0020] Figure 6 It is a schematic diagram of the connection structure between the horizontal plate and the vertical plate of the present invention.

[0021] In the figure: 1. Processing table; 2. Reciprocating motor; 3. Screw; 4. Fixed block; 5. Outer arc grinding plate; 6. Inner arc grinding plate; 7. Mounting block; 8. Mounting slot; 9. Connecting spring; 10. Positioning buzzer; 11. Guide vane body; 12. Guide vane shaft; 13. Moving frame; 14. Casing; 15. Auxiliary support plate; 16. Slot; 17. Arc pressure plate; 18. Electric hydraulic; 19. Slide; 20. Slider; 21. Threaded rod; 22. Crank; 23. Guide rod; 24. Limiting plate; 25. Mounting plate; 26. Connecting plate; 27. Horizontal plate; 28. Vertical plate; 29. ​​Electric push rod; 30. Sheet metal mounting parts. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0023] like Figure 1 to Figure 6 As shown, the embodiment of the present invention proposes a positioning device for inner and outer arc processing of a steam turbine guide blade, comprising a processing table 1, a guide rod 23 is fixedly installed on one side of the inner wall of the processing table 1, a fixing block 4 is inserted and connected to the outer ring of the guide rod 23, a limit plate 24 is fixedly installed on one end of the guide rod 23, and a mounting plate 25 is fixedly and slidably connected to the bottom of the inner wall of the processing table 1; The invention is characterized in that: a positioning mechanism is provided on one side of the processing table 1, and the positioning mechanism includes a positioning buzzer 10, a guide vane body 11, a guide vane shaft 12, a movable frame 13, a sleeve 14, an auxiliary support plate 15 and a slot 16. Two positioning buzzers 10 are fixedly installed in the middle of one side of the fixed block 4, a movable frame 13 is fixedly installed on the top of the mounting plate 25, an auxiliary support plate 15 is slidably connected to the top of the movable frame 13, a slot 16 is opened on one side of the auxiliary support plate 15, a sleeve 14 is fixedly installed on one side of the movable frame 13, the inner wall of the sleeve 14 is sleeved with the guide vane shaft 12, the other end of the guide vane shaft 12 is connected to the inner wall of the slot 16, and the outer ring of the guide vane shaft 12 is fixedly provided with a guide vane body 11.

[0024] Specifically, an electric hydraulic rod 18 is fixedly installed on the top of the inner wall of the slot 16, and an arc-shaped pressure plate 17 is fixedly installed on the output shaft of the electric hydraulic rod 18. The arc-shaped pressure plate 17 is engaged with the guide vane shaft 12. The electric hydraulic rod 18 drives the arc-shaped pressure plate 17 to move downward, thereby pressing the outer ring of one end of the guide vane shaft 12, and stabilizing the guide vane body 11 when grinding.

[0025] Specifically, a sheet metal mounting part 30 is fixedly installed on the bottom of one side of the processing table 1, an electric push rod 29 is fixedly installed on one side of the sheet metal mounting part 30, and a vertical plate 28 is fixedly installed on the output shaft of the electric push rod 29. The electric push rod 19 is fixed by the sheet metal mounting part 30, and the electric push rod 29 drives the vertical plate 28 to move, and when the vertical plate 28 moves, it drives the horizontal plate 27 to move.

[0026] Specifically, a horizontal plate 27 is fixedly installed on the top of the vertical plate 28, and two connecting plates 26 are fixedly installed on both sides of the top of the horizontal plate 27, and the other ends of the two connecting plates 26 are fixedly connected to the mounting plate 25. The vertical plate 28 fixes the horizontal plate 27, and the horizontal plate 27 fixes the two connecting plates 26, which drives the two connecting plates 26 to move, which will drive the mounting plate 25 to move, and drive the guide vane body 11 in the positioning mechanism to squeeze the positioning buzzer 10, so as to achieve the positioning effect.

[0027] Specifically, a reciprocating motor 2 is fixedly installed on one side of the processing table 1, and a screw rod 3 is fixedly installed on the output shaft of the reciprocating motor 2. The screw rod 3 penetrates and extends into the processing table 1. The reciprocating motor 2 drives the screw rod 3 to rotate, thereby driving the fixed block 4 to move.

[0028] Specifically, the outer ring of the screw rod 3 is threadedly connected to the fixing block 4, and an outer arc grinding plate 5 is fixedly installed on the top of one side of the fixing block 4. The fixing block 4 moves to drive the outer arc grinding plate 5 to grind the outer ring of the guide vane body 11 to make its outer arc surface smooth.

[0029] Specifically, a mounting groove 8 is opened in the middle of one side of the fixing block 4, and the inner walls on both sides of the mounting groove 8 are slidably connected with mounting blocks 7. The mounting block 7 is slidably connected through the mounting groove 8, and the mounting block 7 fixes the inner arc grinding plate 6 and the connecting spring 9, and drives the inner arc grinding plate 6 to move up and down. At the same time, when the mounting block 7 moves in the mounting groove 8, the connecting spring 9 will be stretched or compressed.

[0030] Specifically, an inner arc grinding plate 6 is fixedly installed on one side of the mounting block 7, and a connecting spring 9 is fixedly installed on the top of the mounting block 7. The top of the connecting spring 9 is fixedly connected to the top of the inner wall of the mounting groove 8. The inner arc grinding plate 6 rubs the inner arc of the guide blade body 11, and the connecting spring 9 returns the mounting block 7.

[0031] Specifically, a slide groove 19 is provided on the top of the movable frame 13, and a threaded rod 21 that penetrates and extends to the outside of the movable frame 13 is rotatably connected to one side of the inner wall of the slide groove 19. The slider 20 is slidably connected through the slide groove 19, the slide groove 9 fixes the threaded rod 21, and the threaded rod 21 fixes the crank 22. The rotation of the crank 22 drives the thread 21 to rotate.

[0032] Specifically, the outer ring of the threaded rod 21 is threadedly connected to a slider 20 fixedly connected to the auxiliary support plate 15, and a crank 22 is fixedly installed on the other end of the threaded rod 21. The threaded rod 21 is rotated by rotating the crank 22, and the slider 20 is driven to slide in the slide groove 19, which will drive the auxiliary support plate 15 to move, and the distance between the auxiliary support plate 15 and the movable frame 13 is adjusted to facilitate the installation of the guide impeller body 11 of different lengths.

[0033] Working principle: connect the other end of the guide vane shaft 12 with the sleeve 14, and then rotate the crank 22 to drive the threaded rod 21 to rotate, drive the slider 20 to move in the slide groove 19, and drive the auxiliary support plate 15 to move. When the slot 16 is connected with the other end of the guide vane shaft 12, stop rotating the crank 22, and then the electric hydraulic rod 18 drives the arc pressure plate 17 to move downward. When the arc pressure plate 17 is engaged with the outer ring of the guide vane shaft 12, one end of the guide vane shaft 12 can be fixed at this time, and the other end of the guide vane shaft 12 is fixed to the sleeve 14, so as to achieve the effect of fixing the guide vane shaft 12 and stabilize the guide vane body 11. At the same time, start the electric push rod 29 to drive the vertical plate 28 to move, and drive the connecting plate 26 to move through the horizontal plate 27, and drive the mounting plate 25 to move, and drive the guide vane body 11 to move through the moving frame 13. When the guide vane body 11 is squeezed by the positioning buzzer 10, close the electric push rod 29. When the guide vane body 11 is squeezed with the positioning buzzer 10, the outer arc of the guide vane body 11 is connected with the outer arc grinding plate 5, and the inner arc will squeeze the inner arc grinding plate 6, so that the mounting block 7 slides in the mounting groove 8, and the connecting spring 9 is stretched to generate potential energy. At this time, under the action of its potential energy, the inner arc grinding plate 6 will be driven by the mounting block 7 to fit with the inner arc of the guide vane body 11, and then the reciprocating motor 2 is started to drive the screw rod 3 to rotate, and the outer arc grinding plate 5 and the inner arc grinding plate 6 are driven by the fixed block 4 to rub the inner and outer arcs of the guide vane body 11 to make its surface smoother. At the same time, when the fixed block 4 moves, it will move back and forth on the guide rod 23. When the fixed block 4 moves the limit plate 24 to fit, the reciprocating motor 2 is reversed at this time, and the fixed block 4 is restored, which will drive the outer arc grinding plate 5 and the inner arc grinding plate 6 to rub back and forth with the inner and outer arcs of the guide vane body 11, and the burrs or convex particles on the inner and outer arc surfaces are polished.

[0034] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0035] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A positioning device for machining inner and outer arcs of a turbine guide blade, comprising a machining table (1), a guide rod (23) fixedly mounted on one side of an inner wall of the machining table (1), a fixing block (4) inserted through an outer ring of the guide rod (23), a limit plate (24) fixedly mounted on one end of the guide rod (23), and a mounting plate (25) fixedly and slidably connected to the bottom of the inner wall of the machining table (1); Features: A positioning mechanism is provided on one side of the processing table (1), and the positioning mechanism comprises a positioning buzzer (10), a guide vane body (11), a guide vane shaft (12), a movable frame (13), a sleeve (14), an auxiliary support plate (15) and a slot (16); two positioning buzzers (10) are fixedly installed in the middle of one side of the fixed block (4); a movable frame (13) is fixedly installed on the top of the mounting plate (25); an auxiliary support plate (15) is slidably connected to the top of the movable frame (13); a slot (16) is provided on one side of the auxiliary support plate (15); a sleeve (14) is fixedly installed on one side of the movable frame (13); the guide vane shaft (12) is sleeved on the inner wall of the sleeve (14); the other end of the guide vane shaft (12) is connected to the inner wall of the slot (16); and the guide vane body (11) is fixedly installed on the outer ring of the guide vane shaft (12).

2. A positioning device for inner and outer arc processing of steam turbine guide vanes according to claim 1, characterized in that: An electric hydraulic rod (18) is fixedly mounted on the top of the inner wall of the clamping slot (16), an arc-shaped pressing plate (17) is fixedly mounted on the output shaft of the electric hydraulic rod (18), and the arc-shaped pressing plate (17) is engaged with the guide vane shaft (12).

3. A positioning device for inner and outer arc processing of steam turbine guide vanes according to claim 1, characterized in that: A sheet metal mounting component (30) is fixedly mounted on the bottom of one side of the processing table (1), an electric push rod (29) is fixedly mounted on one side of the sheet metal mounting component (30), and a vertical plate (28) is fixedly mounted on the output shaft of the electric push rod (29).

4. A positioning device for inner and outer arc processing of steam turbine guide vanes according to claim 3, characterized in that: A transverse plate (27) is fixedly mounted on the top of the vertical plate (28), two connecting plates (26) are fixedly mounted on both sides of the top of the transverse plate (27), and the other ends of the two connecting plates (26) are fixedly connected to the mounting plate (25).

5. A positioning device for inner and outer arc processing of steam turbine guide vanes according to claim 1, characterized in that: A reciprocating motor (2) is fixedly mounted on one side of the processing table (1), a screw rod (3) is fixedly mounted on the output shaft of the reciprocating motor (2), and the screw rod (3) penetrates and extends into the processing table (1).

6. A positioning device for inner and outer arc processing of steam turbine guide vanes according to claim 5, characterized in that: The outer ring of the screw rod (3) is threadedly connected to a fixing block (4), and an outer arc grinding plate (5) is fixedly mounted on the top of one side of the fixing block (4).

7. A positioning device for inner and outer arc processing of steam turbine guide vanes according to claim 6, characterized in that: A mounting groove (8) is provided in the middle of one side of the fixing block (4), and mounting blocks (7) are slidably connected to inner walls on both sides of the mounting groove (8).

8. A positioning device for inner and outer arc processing of steam turbine guide vanes according to claim 7, characterized in that: An inner arc grinding plate (6) is fixedly mounted on one side of the mounting block (7), a connecting spring (9) is fixedly mounted on the top of the mounting block (7), and the top end of the connecting spring (9) is fixedly connected to the top of the inner wall of the mounting groove (8).

9. A positioning device for inner and outer arc processing of steam turbine guide vanes according to claim 1, characterized in that: A slide groove (19) is provided on the top of the movable frame (13), and a threaded rod (21) penetrating through and extending to the outside of the movable frame (13) is rotatably connected to one side of the inner wall of the slide groove (19).

10. A positioning device for inner and outer arc processing of steam turbine guide vanes according to claim 9, characterized in that: The outer ring of the threaded rod (21) is threadedly connected to a slider (20) fixedly connected to the auxiliary support plate (15), and the other end of the threaded rod (21) is fixedly mounted with a crank (22).

Images