A device and method for processing turbine blades using laser cladding to prevent water erosion

Abstract

The present invention relates to the technical field of steam turbine blade processing devices, and in particular to a steam turbine blade processing device and method using laser cladding to prevent erosion; a steam turbine blade processing device using laser cladding to prevent erosion of the present invention comprises: a laser cladding mechanism and a clamping mechanism; an electromagnetic vibration mechanism is arranged on the clamping mechanism; the electromagnetic coil is installed in the base; the vibration block is slidably matched with the base; a shielding unit is arranged on the base and the vibration block; the shielding unit shields the magnetic field generated by the electromagnetic coil and the magnet block to prevent the magnetic field from interfering with the laser cladding effect of the steam turbine blade; the present invention shields the outer side and the top of the base by arranging a first arc-shaped shielding block and a second arc-shaped shielding block on the base and the vibration block respectively, thereby preventing the magnetic field generated by the electromagnetic coil from affecting the flow pattern and speed of liquid metal in the molten pool during laser cladding of the upper turbine blade.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbine blade processing devices, and in particular to a steam turbine blade processing device and method using laser cladding to prevent erosion. Background Art

[0002] Laser cladding is a surface modification technology. Its working principle is to irradiate the surface of the base material with a high-energy-density laser beam, and simultaneously feed the cladding material (usually in powder form) into the molten pool, so that the cladding material and the thin layer on the base surface are quickly melted and mixed, and then quickly solidified to form a cladding layer with specific properties. Laser cladding has a wide range of applications, such as aerospace, automobile manufacturing, petrochemicals, mold repair, etc. It can be used to improve the wear resistance, corrosion resistance, high temperature resistance and other properties of parts, and extend the service life of parts.

[0003] Laser cladding of turbine blades is mainly used to repair and strengthen the turbine blades and prevent water erosion of the turbine blades. The cladding head of the laser cladding device moves on the surface of the turbine blades to perform laser cladding processing on the turbine blades. The high temperature generated during the cladding process causes thermal stress in the turbine blades, causing the turbine blades to deform. Therefore, in the prior art, an electromagnetic vibration device is arranged on the turbine blades. During the cladding process of the turbine blades, the turbine blades are vibrated at the same time, which eliminates part of the thermal stress and accelerates the overflow of bubbles in the cladding layer during cladding, thereby improving the processing quality of laser cladding. However, the magnetic field generated by the electromagnetic vibration device will affect the flow pattern and speed of the liquid metal in the molten pool during cladding, thereby affecting the uniformity and microstructure of the cladding layer, and has a certain control effect on the crystallization direction of the cladding metal, thereby affecting the crystal structure and mechanical properties, thereby causing limitations.

[0004] To this end, we propose a device and method for processing turbine blades using laser cladding to prevent water erosion. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a device and method for processing turbine blades using laser cladding to prevent erosion, which overcomes the deficiencies in the prior art and aims to solve the problems in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a steam turbine blade processing device using laser cladding to prevent water erosion, comprising:

[0007] Laser cladding mechanism and clamping mechanism; the clamping mechanism clamps the turbine blade; the clamping mechanism is provided with an electromagnetic vibration mechanism; the electromagnetic vibration mechanism comprises a base, an electromagnetic coil, a magnet block and a vibration block; the base is installed on the clamping mechanism; the electromagnetic coil is installed in the base; the magnet block is fixed in the vibration block; the vibration block and the base are slidably matched; shielding units are provided on the base and the vibration block; the shielding unit shields the magnetic field generated by the electromagnetic coil and the magnet block to prevent the magnetic field from interfering with the laser cladding effect of the turbine blade;

[0008] A clamping block is installed on the vibration block; the two ends of the clamping block are rotatably connected with clamping clamps; the two ends of the clamping block are hinged with clamping electric push rods; the output end of the clamping electric push rod is hinged with the clamping clamp;

[0009] The clamping block and the clamping clamp are both slidably connected with push rods at even intervals; and a contact block is spherically hinged on the end of the push rod.

[0010] Preferably, the shielding unit includes an arc-shaped shielding block No. 1 and an arc-shaped shielding block No. 2; the arc-shaped shielding block No. 1 and the arc-shaped shielding block No. 2 are both annular; the arc-shaped shielding block No. 1 is fixedly connected to the outside of the base; the arc-shaped shielding block No. 2 is fixedly connected to the outside of the vibration block; the arc-shaped shielding block No. 1 and the arc-shaped shielding block No. 2 are both made of metal.

[0011] By arranging arc-shaped shielding blocks No. 1 and No. 2 on the base and the vibration block respectively, the outer side and the top of the base are shielded, thereby preventing the magnetic field generated by the electromagnetic coil from affecting the flow pattern and speed of the liquid metal in the molten pool during laser cladding of the turbine blades above.

[0012] Preferably, a pushing spring is fixedly connected to the push rod; a fixing groove is provided on the clamping block and the clamping clamp; a fixing block is slidably connected in the fixing groove; the end surfaces of the fixing block and the push rod that are close to each other are arranged to be toothed and can mesh with each other; a fixed electric push rod whose output end is fixed to the fixing block is fixedly connected in the fixing groove.

[0013] Preferably, a movable groove is provided on the clamping mechanism; a movable motor is fixedly connected in the movable groove, and a movable block is slidably connected in the movable groove; a screw rod which is threadably matched with the movable block is fixedly connected to the output end of the movable motor; and the base is fixedly connected to the movable block.

[0014] Preferably, both the clamping block and the clamping clamp are provided with a receiving groove; an arc-shaped rod is placed in the receiving groove; connecting ropes are evenly fixed to the arc-shaped rod; and the other end of the connecting rope is fixed to the push rod.

[0015] Preferably, the arc rod is fixed in the accommodating groove by bolts.

[0016] By setting a clamping block and a clamping clamp, the vibration block is connected to the turbine blade, and is in contact with the turbine blade through a push rod and a contact block. The push rod and the contact block can be adjusted, so that the present invention can be applied to turbine blades of different specifications.

[0017] A method for processing a turbine blade using laser cladding to prevent water erosion, the method is applicable to the above-mentioned device for processing a turbine blade using laser cladding to prevent water erosion, and the steps of the method are as follows:

[0018] S1. Clamp the turbine blade on the clamping mechanism, and then move the moving block so that the clamping block and the clamping clip move, the clamping block and the clamping clip are sleeved on the outside of the turbine blade, and the push rod and contact block on the clamping block and the clamping clip contact the turbine blade;

[0019] S2, an alternating current is passed into the electromagnetic coil in the base, so that the magnet block vibrates with the vibration block, the clamping block and the turbine blade, and the laser cladding mechanism performs laser cladding on the surface of the turbine blade;

[0020] S3. The first arc-shaped shielding block shields the outside of the base, and the second arc-shaped shielding block shields the top of the base, thereby shielding the magnetic field generated by the electromagnetic coil, so that the magnetic field will not affect the laser cladding.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention provides a first arc-shaped shielding block and a second arc-shaped shielding block on the base and the vibration block respectively to shield the outside and the top of the base, thereby preventing the magnetic field generated by the electromagnetic coil from affecting the flow pattern and speed of the liquid metal in the molten pool during the laser cladding of the upper turbine blades.

[0023] 2. The present invention connects the vibration block to the turbine blade by providing a clamping block and a clamping clamp, and contacts the turbine blade through a push rod and a contact block. The push rod and the contact block can be adjusted, so that the present invention can be applied to turbine blades of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0026] Figure 3 for Figure 2 The cross-sectional view of the clamping block, the fixed block and the arc rod at the cross-sectional view angle at the middle BB;

[0027] Figure 4 It is a partial cross-sectional view of the moving block, base and vibration block in the present invention.

[0028] In the figure: 1. laser cladding mechanism; 2. clamping mechanism; 21. moving groove; 22. moving motor; 23. moving block; 31. base; 32. electromagnetic coil; 33. magnet block; 34. vibration block; 41. arc-shaped shielding block No. 1; 42. arc-shaped shielding block No. 2; 5. clamping block; 51. clamping clamp; 52. clamping electric push rod; 6. push rod; 61. contact block; 62. push spring; 63. fixed groove; 64. fixed block; 65. fixed electric push rod; 66. accommodating groove; 67. arc-shaped rod; 68. connecting rope. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1: Refer to the attached specification Figure 1 , a steam turbine blade processing device using laser cladding to prevent water erosion, comprising:

[0031] Laser cladding mechanism 1 and clamping mechanism 2; the clamping mechanism 2 clamps the turbine blade; the clamping mechanism 2 is provided with an electromagnetic vibration mechanism; the electromagnetic vibration mechanism comprises a base 31, an electromagnetic coil 32, a magnet block 33 and a vibration block 34; the base 31 is installed on the clamping mechanism 2; the electromagnetic coil 32 is installed in the base 31; the magnet block 33 is fixed in the vibration block 34; the vibration block 34 is slidably matched with the base 31; shielding units are provided on the base 31 and the vibration block 34; the shielding unit shields the magnetic field generated by the electromagnetic coil 32 and the magnet block 33 to prevent the magnetic field from interfering with the laser cladding effect of the turbine blade;

[0032] In the present invention, a clamping block 5 is mounted on the vibration block 34; clamping clamps 51 are rotatably connected to both ends of the clamping block 5; clamping electric push rods 52 are hingedly connected to both ends of the clamping block 5; and the output end of the clamping electric push rod 52 is hingedly connected to the clamping clamp 51;

[0033] In the present invention, the clamping block 5 and the clamping clamp 51 are evenly spaced and slidably connected with push rods 6; the end of the push rod 6 is spherically hinged with a contact block 61.

[0034] Refer to the instruction manual Figure 4In the present invention, the shielding unit includes a first arc-shaped shielding block 41 and a second arc-shaped shielding block 42; the first arc-shaped shielding block 41 and the second arc-shaped shielding block 42 are both annular; the first arc-shaped shielding block 41 is fixedly connected to the outside of the base 31; the second arc-shaped shielding block 42 is fixedly connected to the outside of the vibration block 34; the first arc-shaped shielding block 41 and the second arc-shaped shielding block 42 are both made of metal, such as iron.

[0035] In the present invention, the staff clamps the turbine blade on the clamping mechanism 2, then connects the vibration block 34 to the turbine blade, then passes alternating current into the electromagnetic coil 32, so that the magnet block 33 causes the vibration block 34 and the turbine blade to vibrate, and then the cladding head of the laser cladding mechanism 1 performs laser cladding on the turbine blade; during the laser cladding, since the first arc-shaped shielding block 41 made of metal shields the outside of the base 31, and the second arc-shaped shielding block 42 shields the top of the base 31, the magnetic field generated by the electromagnetic coil 32 is shielded above the base 31, thereby not affecting the laser cladding effect of the turbine blade;

[0036] The present invention provides a first arc-shaped shielding block 41 and a second arc-shaped shielding block 42 on the base 31 and the vibration block 34, respectively, to shield the outside and top of the base 31, thereby preventing the magnetic field generated by the electromagnetic coil 32 from affecting the flow pattern and speed of the liquid metal in the molten pool during laser cladding of the turbine blades above.

[0037] Embodiment 2: Based on Embodiment 1, refer to the attached Figure 2 and 3 A push spring 62 is fixedly connected to the push rod 6; a fixing groove 63 is provided on the clamping block 5 and the clamping clamp 51; a fixing block 64 is slidably connected in the fixing groove 63; the end surfaces of the fixing block 64 and the push rod 6 that are close to each other are both arranged to be toothed and can mesh with each other; a fixed electric push rod 65 whose output end is fixed to the fixing block 64 is fixedly connected in the fixing groove 63.

[0038] In the present invention, a moving groove 21 is opened on the clamping mechanism 2; a moving motor 22 is fixedly connected in the moving groove 21, and a moving block 23 is slidably connected in the moving groove 21; a screw rod threadedly matched with the moving block 23 is fixedly connected to the output end of the moving motor 22; and a base 31 is fixedly connected to the moving block 23.

[0039] In the present invention, both the clamping block 5 and the clamping clamp 51 are provided with a receiving groove 66 ; an arc rod 67 is placed in the receiving groove 66 ; connecting ropes 68 are evenly fixed to the arc rod 67 ; and the other end of the connecting rope 68 is fixed to the top rod 6 .

[0040] In the present invention, the arc rod 67 is fixed in the receiving groove 66 by bolts.

[0041] In the present invention, the staff first unscrews the bolts on the arc rod 67, then pulls the arc rod 67 out of the receiving groove 66, and fixes the electric push rod 65 to push the fixed block 64, so that the fixed block 64 is separated from the push rod 6, and the push rod 6 is pulled to move by the arc rod 67 and the connecting rope 68, so that the push rod 6 moves toward the corresponding clamping block 5 and the clamping clamp 51, and then the staff inserts the turbine impeller into the clamping block 5 and the clamping clamp 51, so that the push rod 6 and the contact block 61 are located on both sides of the turbine blade, and then the arc rod 67 is fixed in the receiving groove 66, and under the action of the push spring 62, the contact block 61 contacts the turbine blade, and then the electric push rod 65 is fixed to pull the fixed block 64, so that the fixed block 64 and the push rod 6 are engaged, thereby fixing the push rod 6, so that the present invention connects the vibration block 34 with the turbine blade;

[0042] In the present invention, after the cladding is cooled, the moving motor 22 drives the moving block 23 to move, so that the moving block 23 moves with the vibrating block 34, the clamping block 5 and the clamping clip 51, and at the same time the fixed block 64 stops engaging with the mandrel 6. Therefore, the clamping block 5 and the clamping clip 51 of the present invention move on the turbine blade to adjust the vibration position of the turbine blade. Since the surface of the turbine blade is a curved surface, the telescopic length of the mandrel 6 is inconsistent during movement.

[0043] In the present invention, since the push rod 6 and the contact block 61 are in contact with the turbine blades through the push spring 62, the present invention can be applied to turbine blades of different specifications;

[0044] The present invention connects the vibration block 34 to the turbine blade by setting a clamping block 5 and a clamping clamp 51, and contacts the turbine blade through a push rod 6 and a contact block 61. The push rod 6 and the contact block 61 can be adjusted, so that the present invention can be applied to turbine blades of different specifications.

[0045] Embodiment 3: A method for processing a turbine blade using laser cladding to prevent water erosion. The method is applicable to the above-mentioned device for processing a turbine blade using laser cladding to prevent water erosion. The steps of the method are as follows:

[0046] S1, clamp the turbine blade on the clamping mechanism 2, then move the moving block 23, so that the clamping block 5 and the clamping clamp 51 move, the clamping block 5 and the clamping clamp 51 are sleeved on the outside of the turbine blade, and the push rod 6 and the contact block 61 on the clamping block 5 and the clamping clamp 51 are in contact with the turbine blade;

[0047] S2, an alternating current is passed into the electromagnetic coil 32 in the base 31, so that the magnet block 33 vibrates with the vibration block 34, the clamping block 5 and the turbine blade, and the laser cladding mechanism 1 performs laser cladding on the surface of the turbine blade;

[0048] S3. The first arc-shaped shielding block 41 shields the outside of the base 31, and the second arc-shaped shielding block 42 shields the top of the base 31, thereby shielding the magnetic field generated by the electromagnetic coil 32, so that the magnetic field will not affect the laser cladding.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected; the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A steam turbine blade processing device using laser cladding to prevent water erosion, characterized in that: include: A laser cladding mechanism (1) and a clamping mechanism (2); the clamping mechanism (2) clamps a turbine blade; an electromagnetic vibration mechanism is provided on the clamping mechanism (2); the electromagnetic vibration mechanism comprises a base (31), an electromagnetic coil (32), a magnet block (33) and a vibration block (34); the base (31) is mounted on the clamping mechanism (2); the electromagnetic coil (32) is mounted in the base (31); the magnet block (33) is fixedly connected in the vibration block (34); the vibration block (34) and the base (31) are slidably matched; shielding units are provided on the base (31) and the vibration block (34); the shielding unit shields the magnetic field generated by the electromagnetic coil (32) and the magnet block (33) to prevent the magnetic field from interfering with the laser cladding effect of the turbine blade; A clamping block (5) is mounted on the vibration block (34); both ends of the clamping block (5) are rotatably connected to clamping clamps (51); both ends of the clamping block (5) are hingedly connected to clamping electric push rods (52); the output end of the clamping electric push rod (52) is hingedly connected to the clamping clamp (51); The clamping block (5) and the clamping clamp (51) are both slidably connected with push rods (6) at even intervals; a contact block (61) is spherically hinged at the end of the push rod (6).

2. The device for processing steam turbine blades using laser cladding to prevent water erosion according to claim 1, characterized in that: The shielding unit comprises a first arc-shaped shielding block (41) and a second arc-shaped shielding block (42); the first arc-shaped shielding block (41) and the second arc-shaped shielding block (42) are both annular; the first arc-shaped shielding block (41) is fixedly connected to the outside of the base (31); the second arc-shaped shielding block (42) is fixedly connected to the outside of the vibration block (34); the first arc-shaped shielding block (41) and the second arc-shaped shielding block (42) are both made of metal.

3. The device for processing turbine blades using laser cladding to prevent water erosion according to claim 2, characterized in that: A push spring (62) is fixedly connected to the push rod (6); a fixing groove (63) is provided on the clamping block (5) and the clamping clamp (51); a fixing block (64) is slidably connected in the fixing groove (63); the end surfaces of the fixing block (64) and the push rod (6) that are close to each other are both arranged in a toothed shape that can mesh with each other; a fixed electric push rod (65) is fixedly connected in the fixing groove (63), the output end of which is fixedly connected to the fixing block (64).

4. The device for processing turbine blades using laser cladding to prevent water erosion according to claim 3, characterized in that: The clamping mechanism (2) is provided with a moving groove (21); a moving motor (22) is fixedly connected in the moving groove (21); a moving block (23) is slidably connected in the moving groove (21); a screw rod threadably matched with the moving block (23) is fixedly connected to the output end of the moving motor (22); and the base (31) is fixedly connected to the moving block (23).

5. The device for processing turbine blades using laser cladding to prevent water erosion according to claim 4, characterized in that: The clamping block (5) and the clamping clamp (51) are both provided with a receiving groove (66); an arc-shaped rod (67) is placed in the receiving groove (66); connecting ropes (68) are evenly fixedly connected to the arc-shaped rod (67); and the other end of the connecting rope (68) is fixedly connected to the top rod (6).

6. The device for processing steam turbine blades using laser cladding to prevent water erosion according to claim 5, characterized in that: The arc-shaped rod (67) is fixed in the receiving groove (66) by means of bolts.

7. A method for processing steam turbine blades by laser cladding to prevent water erosion, the method being applicable to a steam turbine blade processing device by laser cladding to prevent water erosion as claimed in any one of claims 1 to 6, characterized in that: The steps of this method are as follows: S1, clamping the turbine blade on the clamping mechanism (2), and then moving the moving block (23) so that the clamping block (5) and the clamping clamp (51) move, the clamping block (5) and the clamping clamp (51) are sleeved on the outer side of the turbine blade, and the push rod (6) and the contact block (61) on the clamping block (5) and the clamping clamp (51) are in contact with the turbine blade; S2, an alternating current is passed into the electromagnetic coil (32) in the base (31), so that the magnet block (33) causes the vibration block (34), the clamping block (5) and the turbine blade to vibrate, and the laser cladding mechanism (1) performs laser cladding on the surface of the turbine blade; S3, the first arc-shaped shielding block (41) shields the outside of the base (31), and the second arc-shaped shielding block (42) shields the top of the base (31), thereby shielding the magnetic field generated by the electromagnetic coil (32), so that the magnetic field will not affect the laser cladding.

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