Pneumatic installation device and method for turbine blade

Abstract

The invention provides a steam turbine blade pneumatic installation device and method.The steam turbine blade pneumatic installation device comprises a movable supporting mechanism, a balancer, a gap filling strip installation mechanism, a blade installation mechanism and a control system.The movable supporting mechanism comprises a base, a stand column, a large arm and a small arm, trundles are arranged on the bottom face of the base, the bottom end of the stand column is arranged on the base, and the small arm is arranged on the base; the large arm is hinged to the top end of the stand column, the small arm is hinged to the end, away from the stand column, of the large arm, the gap filling strip mounting mechanism and the blade mounting mechanism are arranged at the end, away from the large arm, of the small arm through a balancer, and the height of the gap filling strip mounting mechanism and the height of the blade mounting mechanism are adjustable. According to the device, the gap filling strip mounting mechanism is arranged and used for beating the gap filling strips, and the blade mounting mechanism is arranged and used for beating the roots of the blades; and the gap filling strip mounting mechanism and the blade mounting mechanism are arranged on the movable supporting mechanism through balancers, so that the pneumatic mounting device can be quickly moved to a blade mounting position.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine blade installation equipment, and in particular to a steam turbine blade pneumatic installation device and method. Background Art

[0002] At present, manual hammering is used for the assembly of steam turbine blades at home and abroad. The installation of both dynamic and static blades adopts the manual hammering method. One is to compact the gap strip, and the other is to hit the root of the blade until it fits the root of the previous blade, ensuring that the gap between the two blades is within the specified range, forming a certain amount of torsion, and accompanied by a certain amount of plastic deformation. There are two problems with the manual hammering installation of blades: one is that the labor intensity is high and the efficiency is low; the other is that work-related accidents are prone to occur. At present, the problem of manual hammering to assemble blades at home and abroad has become a technical problem that has been plaguing manufacturers in blade assembly. It is very necessary to explore and manufacture an assembly tool that can replace the manual hammering of blades.

[0003] The prior art publication number CN201710380716.2 discloses an automatic assembly device for steam turbine blades. By arranging a transverse screw and a longitudinal screw on a gantry frame, a gap-filling strip pressing tool and a blade pressing tool are pressed in sequence to achieve the function of installing the steam turbine blades. However, the automatic assembly device involved in this patent has a complex structure, occupies a large area, is inconvenient to use, and the continuous and huge static pressure may cause problems such as rotor deformation.

[0004] The prior art publication number CN210232867U discloses a dedicated independent single-acting striking device for turbine blade assembly. Through the design and integration of pneumatic equipment and mechanical structure, semi-automatic blade assembly is achieved, reducing the labor intensity of workers and improving production efficiency. At the same time, it greatly avoids the original industrial accidents caused by hitting the hand with a hammer. At the same time, the device involved in the patent is small in size and flexible in operation, and has strong practicality in front-line industrial production. However, the patent is an open structure, and the safety is poor when striking the blades. If the shell is simply closed, when replacing different drill bits, the shell of the device needs to be completely disassembled, which is difficult to operate and inconvenient to replace the drill bit, affecting production efficiency. In addition, the cantilever bracket not disclosed in the technology can only suspend one striking tool, and it is inconvenient to switch between striking the gap filler and striking the blade. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a pneumatic installation device and method for turbine blades, which is used to solve the problems involved in the prior art that the automatic blade assembly device has a complex structure, occupies a large area, is inconvenient to use, and has cumbersome operations for replacing the brazing tool.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides a pneumatic installation device for steam turbine blades, including a mobile support mechanism, a balancer, a shim installation mechanism, a blade installation mechanism, and a control system, wherein the mobile support mechanism includes a base, a column, a large arm, and a small arm, and casters are arranged on the bottom surface of the base, the bottom end of the column is arranged on the base, the large arm is hinged to the top end of the column, and the small arm is hinged to the end of the large arm away from the column, the shim installation mechanism and the blade installation mechanism are arranged at the end of the small arm away from the large arm through the balancer, and the heights of the shim installation mechanism and the blade installation mechanism are adjustable; the shim installation mechanism is used for striking the shim, and the blade installation mechanism is used for striking the root of the blade; the control system is communicatively connected with the shim installation mechanism and the blade installation mechanism.

[0007] Preferably, the mobile support mechanism also includes a support foot, a tool suspension beam, and a suspension beam rotation drive assembly, the support foot is connected to the base for supporting the base on the ground; the tool suspension beam is transmission-connected to the suspension beam rotation drive assembly, the gap-filling strip mounting mechanism and the blade mounting mechanism are arranged on the tool suspension beam, and the suspension beam rotation drive assembly is arranged at the end of the forearm away from the upper arm; the upper arm and the column are hinged by a first rotation drive assembly, and the forearm and the upper arm are hinged by a second rotation drive assembly; the control system is communicatively connected to the first rotation drive assembly, the second rotation drive assembly, and the suspension beam rotation drive assembly, respectively.

[0008] Preferably, the filling strip installation mechanism includes a lower cover shell, an impact cylinder, a hammer, a handle, a switch button, and a chisel fixing buffer assembly, the lower cover shell is a hollow part, the impact cylinder is arranged in the lower cover shell, the hammer is connected to the piston end of the impact cylinder, the handle is arranged on the outer peripheral surface of the lower cover shell, and the switch button is integrated on the handle; the switch button is communicatively connected with the control system; the chisel fixing buffer assembly is arranged at the bottom of the lower cover shell and is located at the lower side of the hammer.

[0009] Preferably, the shim strip installation mechanism further comprises an upper cover shell, the upper cover shell is located above the lower cover shell, and the fixed end of the impact cylinder is arranged inside the upper cover shell.

[0010] Preferably, the blade mounting mechanism and the shim strip mounting mechanism are similar in structure, and only the specifications of the impact cylinder and the shape of the chisel are different.

[0011] Preferably, the brazing rod fixed buffer assembly comprises a base, a fixed cover plate, a slip ring, a compression spring, and a U-shaped pin, the base being a hollow member, the base being arranged at the bottom of the lower cover shell, the fixed cover plate being arranged on the top surface of the base, the slip ring being slidably arranged in the base, and the compression spring being arranged between the bottom surface of the slip ring and the bottom surface of the base; the brazing rod is installed in the brazing rod fixed buffer assembly, a limiting groove is provided on the outer periphery of the brazing rod, the U-shaped pin is inserted in the limiting groove, and a magnet is further provided between the end of the U-shaped pin and the slip ring, the magnet is fixedly connected to the slip ring, and the magnet is adsorbed and connected to the end of the U-shaped pin; the brazing rod passes through the fixed cover plate, the slip ring, and the base in sequence from top to bottom.

[0012] Preferably, the steam turbine blade aerodynamic installation device further comprises a pin pulling tool, which comprises a magnetizer, a magnet group, and a pin pulling body, wherein the magnetizer and the magnet group are both arranged on the pin pulling body, and the magnetizer abuts against the magnet group.

[0013] Preferably, the magnetic force between the magnetic conductor and the U-shaped pin is greater than the magnetic force between the U-shaped pin and the slip ring.

[0014] Preferably, the control system includes an air control circuit, a PLC, several pressure regulating valves, and several solenoid valves. There are two pressure regulating valves, and the two pressure regulating valves are arranged in the air control circuit to control the air pressure of the filler strip installation mechanism and the blade installation mechanism respectively; there are two solenoid valves, one end of the air control circuit is connected to the gas, and the other end is connected to the impact cylinder in the filler strip installation mechanism and the blade installation mechanism through two solenoid valves respectively; the PLC is communicatively connected to the switch button, the solenoid valve, the first rotation drive assembly, the second rotation drive assembly, and the suspension beam rotation drive assembly.

[0015] To achieve the above purpose or other purposes, the present invention also discloses a method for pneumatically installing a steam turbine blade, using the above-mentioned pneumatically installing device for steam turbine blades, and the steps are as follows:

[0016] S1: The operator moves the steam turbine blade pneumatic installation device to the blade installation location through a base with casters;

[0017] S2: The operator adjusts the angle between the boom and the column, and the angle between the forearm and the boom, so that the shim strip installation mechanism and the blade installation mechanism are located above the blade installation position; and adjusts the air pressure of the shim strip installation mechanism and the blade installation mechanism;

[0018] S3: lowering the shim strip installation mechanism through the balancer, rotating the tool suspension beam in the mobile support mechanism to a suitable position, and starting the shim strip installation mechanism, so that the shim strip installation mechanism performs striking installation on the shim strip;

[0019] S4: The gap filling strip installation mechanism is raised through the balancer, the blade installation mechanism is lowered, the tool suspension beam in the mobile support mechanism is rotated to a suitable position, and the blade installation mechanism is started, and the blade installation mechanism performs striking installation on the root of the blade.

[0020] Preferably, the frequency of the shim strip installation mechanism striking and installing the shim strip in step S3 and the frequency of the blade installation mechanism striking and installing the blade root in step S4 can be adjusted by the control system.

[0021] As described above, the steam turbine blade aerodynamic installation device and method according to the present invention have the following beneficial effects:

[0022] The invention relates to a pneumatic installation device and method for steam turbine blades, which are provided with a shim strip installation mechanism for striking the shim strip, and a blade installation mechanism for striking the root of the blade; and the shim strip installation mechanism and the blade installation mechanism are both arranged on a movable support mechanism through a balancer, so as to quickly move the pneumatic installation device to the blade installation position. The shim strip installation mechanism and the blade installation mechanism are both installed on the movable support mechanism through a balancer, so that the weight of the two can be completely balanced, and the operation is light and convenient. A U-shaped pin and a pin removal tool are provided, so that the drill can be quickly installed in the drill fixing buffer assembly, which is convenient for the replacement of the drill and is suitable for the installation requirements of blades of different specifications. The invention is provided with a tool suspension beam, and the shim strip installation mechanism and the blade installation mechanism are both installed on the tool suspension beam, so that the shim strip installation and the blade installation can be switched conveniently, which solves the problem in the prior art that the cantilever bracket can only suspend one striking tool, and the switching between striking the shim strip and striking the blade is inconvenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a spatial schematic diagram of the pneumatic installation device for steam turbine blades of the present invention;

[0024] Figure 2 It is a front view of the movable support mechanism of the pneumatic mounting device for steam turbine blades of the present invention.

[0025] Figure 3 A schematic structural diagram of a shim strip installation mechanism / blade installation mechanism of a pneumatic installation device for a steam turbine blade according to the present invention;

[0026] Figure 4 A top view of a shim strip mounting mechanism / blade mounting mechanism of a pneumatic mounting device for a steam turbine blade according to the present invention;

[0027] Figure 5 It is a structural schematic diagram of a brazing tool fixing buffer assembly of a pneumatic installation device for steam turbine blades of the present invention;

[0028] Figure 6 for Figure 5Cross-sectional view along KK.

[0029] Description of reference numerals:

[0030] 1. Mobile support mechanism; 101. Base; 102. Casters; 103. Support feet; 104. Column; 105. Upper arm; 106. Lower arm; 107. Tool suspension beam; 108. Suspension beam rotation drive assembly; 109. First rotation drive assembly; 110. Second rotation drive assembly;

[0031] 2. Balancer;

[0032] 3. Gap-filling strip installation mechanism; 301. Impact cylinder; 302. Lower cover; 303. Hammer; 304. Handle; 3041. Switch button; 305. Brazing tool fixing buffer assembly; 3051. Base; 3052. Fixed cover plate; 3053. Slip ring; 3054. Compression spring; 3055. Magnet; 3056. U-shaped pin; 306. Brazing tool; 3061. Limiting groove; 307. Pin pulling tool; 3071. Magnetic conductor; 3072. Magnet group; 3073. Pin pulling body; 308. Upper cover;

[0033] 4. Blade mounting mechanism. DETAILED DESCRIPTION

[0034] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0035] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0036] like Figure 1-Figure 6As shown, the present invention provides a pneumatic installation device for steam turbine blades, including a mobile support mechanism 1, a balancer 2, a shim installation mechanism 3, a blade installation mechanism 4, and a control system. The mobile support mechanism 1 includes a base 101, a column 104, a large arm 105, and a small arm 106. A caster 102 is arranged on the bottom surface of the base 101, the bottom end of the column 104 is fixed on the top surface of the base 101, the large arm 105 is hinged on the top periphery of the column 104, and the small arm 106 is hinged on the end periphery of the large arm 105 away from the column 104. The shim installation mechanism 3 and the blade installation mechanism 4 are arranged at the end of the small arm 106 away from the large arm 105 through the balancer 2, and the heights of the shim installation mechanism 3 and the blade installation mechanism 4 are adjustable; the shim installation mechanism 3 is used for striking the shim, and the blade installation mechanism 4 is used for striking the root of the blade; the control system is communicatively connected with the shim installation mechanism 3 and the blade installation mechanism 4.

[0037] The present invention is provided with a mobile support mechanism 1, and a shim strip installation mechanism 3 and a blade installation mechanism 4 are both arranged on the mobile support mechanism 1. The mobile support mechanism 1 can be quickly moved to the blade installation position, which is convenient and fast, and the method of use is simple and easy to operate. The upper arm 105 is hinged on the outer periphery of the base 101, and the lower arm 106 is hinged on the outer periphery of the upper arm 105, that is, the use range of the shim strip installation mechanism 3 and the blade installation mechanism 4 is an arc-shaped area, and the mobile support mechanism 1 can be moved once, so that all blades within the coverage range can be installed, which is convenient to use and does not require frequent movement. At the same time, the shim strip installation mechanism 3 and the blade installation mechanism 4 are provided, and there is no need to frequently replace the chisel 306, and the striking of the shim strip and the root of the blade can be quickly completed, and the striking frequency is adjusted by the control system, without manual operation, which reduces the labor intensity and avoids the occurrence of work-related injuries.

[0038] Preferably, Figure 2As shown, the mobile support mechanism 1 also includes a support foot 103, a tool suspension beam 107, and a suspension beam rotation drive assembly 108. The support foot 103 is connected to the base 101, and is used to support the base 101 on the ground; the tool suspension beam 107 is transmission-connected to the suspension beam rotation drive assembly 108, the gap-filling strip mounting mechanism 3 and the blade mounting mechanism 4 are arranged on the tool suspension beam 107, and the suspension beam rotation drive assembly 108 is arranged at the end of the forearm 106 away from the upper arm 105; the upper arm 105 and the column 104 are hinged by a first rotation drive assembly 109, and the forearm 106 and the upper arm 105 are hinged by a second rotation drive assembly 110; the control system is communicatively connected to the first rotation drive assembly 109, the second rotation drive assembly 110, and the suspension beam rotation drive assembly 108, respectively. Further, in this embodiment, the number of the legs 103 is four, and extension rods are provided at the four corners of the base 101, and threaded holes are provided at the ends of the extension rods. The legs 103 are bolted, and the legs 103 are screwed in the threaded holes. By adjusting the matching length of the bolts in the threaded holes, the base 101 can be stably supported. In this embodiment, two through holes are provided on the tool suspension beam 107, and the number of the balancers 2 is two, and the two balancers 2 are connected in the two through holes by flexible ropes. Further, in this embodiment, the first rotary drive assembly 109, the second rotary drive assembly 110, and the suspension beam rotary drive assembly 108 all use motors, and the output shaft of the motor can be provided with components such as a gearbox according to production needs to achieve position adjustment of the gap filler strip installation mechanism 3 and the blade installation mechanism 4. In this embodiment, relying on the hinge between the upper arm 105 and the column 104, and the hinge between the small arm 106 and the upper arm 105, it can be pulled at will within a semicircular sector of a certain length.

[0039] Preferably, Figure 3As shown, the shim strip installation mechanism 3 includes a lower cover shell 302, an impact cylinder 301, a hammer 303, a handle 304, a switch button 3041, and a chisel fixing buffer assembly 305. The lower cover shell 302 is a hollow part, the impact cylinder 301 is arranged in the lower cover shell 302, the hammer 303 is connected to the piston end of the impact cylinder 301, the handle 304 is arranged on the outer peripheral surface of the lower cover shell 302, and the switch button 3041 is integrated on the handle 304; the switch button 3041 is communicatively connected with the control system; the chisel fixing buffer assembly 305 is arranged at the bottom of the lower cover shell 302 and is located at the lower side of the hammer 303. Furthermore, in this embodiment, the lower cover 302 is a hollow cylindrical member, and a through hole is opened on the top surface of the lower cover 302. The piston end of the impact cylinder 301 is inserted into the through hole and enters the interior of the lower cover 302, and the fixed end of the impact cylinder 301 is fastened to the top surface of the lower cover 302. The drill fixing buffer assembly 305 is fastened to the bottom end surface of the lower cover 302 by screws, and the drill 306 is arranged in the drill fixing buffer assembly 305, and the drill 306 is arranged directly below the hammer 303; when the hammer 303 moves up and down under the action of the piston end of the impact cylinder 301, the drill 306 strikes the shim strip or the root of the blade.

[0040] Preferably, Figure 3 As shown, the shim strip installation mechanism 3 further includes an upper cover 308, which is located above the lower cover 302 and the fixed end of the impact cylinder 301 is arranged inside the upper cover 308. In this embodiment, the upper cover 308 is also a hollow cylindrical member for protecting the fixed end of the impact cylinder 301.

[0041] Preferably, Figure 5 , Figure 6As shown, the drill fixing buffer assembly 305 includes a base 3051, a fixed cover plate 3052, a slip ring 3053, a compression spring 3054, and a U-shaped pin 3056. The base 3051 is a hollow member, and the base 3051 is fastened to the bottom end surface of the lower cover 302 by screws. The fixed cover plate 3052 is arranged on the top surface of the base 3051. The slip ring 3053 can be slid up and down in the base 3051, and the compression spring 3054 is arranged on the bottom end surface of the lower cover 302. 54 is arranged between the bottom surface of the slip ring 3053 and the bottom surface of the base 3051; the drill 306 is installed in the drill fixing buffer assembly 305, and a limiting groove 3061 is provided on the outer periphery of the drill 306, and the U-shaped pin 3056 is inserted in the limiting groove 3061, and the end of the U-shaped pin 3056 is connected to the slip ring 3053; the drill 306 passes through the fixed cover plate 3052, the slip ring 3053, and the base 3051 from top to bottom. Further, in this embodiment, the number of the limiting grooves 3061 is two, and the two limiting grooves 3061 are symmetrical about the vertical center line of the drill 306, and the size of the U-shaped pin 3056 is just stuck in the two limiting grooves 3061. The U-shaped pin 3056 is located above the slip ring 3053 and the open end of the U-shaped pin 3056 is adsorbed and connected to the slip ring 3053 through the magnet 3055.

[0042] Preferably, Figure 5 , Figure 6 As shown, the steam turbine blade aerodynamic installation device further includes a pin pulling tool 307, which includes a magnetizer 3071, a magnet group 3072, and a pin pulling body 3073. The magnetizer 3071 and the magnet group 3072 are both arranged on the pin pulling body 3073, and the magnetizer 3071 abuts against the magnet group 3072. In this embodiment, the magnetic force between the magnetizer 3071 and the U-shaped pin 3056 is greater than the magnetic force between the U-shaped pin 3056 and the slip ring 3053. When the operator replaces the drill 306, the operator makes the magnetizer 3071 abut against the U-shaped pin 3056, and the magnet group 3072 generates a magnetic force on the U-shaped pin 3056 through the magnetizer 3071. The magnetic force is greater than the magnetic force between the U-shaped pin 3056 and the slip ring 3053. The operator pulls the U-shaped pin 3056 outward through the pin puller body 3073 to separate the U-shaped pin 3056 from the slip ring 3053, that is, the U-shaped pin 3056 is removed from the limiting groove 3061, and the drill 306 can be taken out from the drill fixing buffer assembly 305, which is convenient for the operator to replace the drill 306.

[0043] Preferably, the control system includes an air circuit control circuit, a PLC, a plurality of pressure regulating valves, and a plurality of solenoid valves, wherein the plurality of pressure regulating valves are arranged in the air circuit control circuit, one end of the air circuit control circuit is connected to the gas, and the other end is connected to the impact cylinder 301 through a plurality of solenoid valves; the PLC is connected to the switch button 3041, the solenoid valve, the first rotation drive assembly 109, the second rotation drive assembly 110, and the suspension beam rotation drive assembly 108. Further, in the present embodiment, the PLC controls the on or off of the air flow in the impact cylinder 301 through the solenoid valve, adjusts the air pressure through the pressure regulating valve, and sets the striking mode of the shim strip installation mechanism 3 and the blade installation mechanism 4 to be continuous striking or single striking through the air circuit control circuit. If it is continuous striking, the air supply frequency of the impact cylinder 301 in the shim strip installation mechanism 3 and the blade installation mechanism 4 can also be adjusted to adjust the striking frequency. The PLC is also connected to the first rotary drive assembly 109, the second rotary drive assembly 110, and the suspension beam rotary drive assembly 108 to control the angles between the upper arm 105 and the column 104, and between the lower arm 106 and the upper arm 105, and adjust or lock the positions between the above-mentioned components. Furthermore, in this embodiment, the number of solenoid valves is two, and the number of pressure regulating valves is two. The two solenoid valves and the two pressure regulating valves correspond to the gap filling strip installation mechanism 3 and the blade installation mechanism 4, respectively, and are used to adjust the air pressure and air path opening and closing of the gap filling strip installation mechanism 3 and the blade installation mechanism 4.

[0044] Further, in this embodiment, the structures of the shim strip mounting mechanism 3 and the blade mounting mechanism 4 are substantially the same, and the internal structure of the blade mounting mechanism 4 is not repeated here. The specifications of the chisel 306 installed in the shim strip mounting mechanism 3 and the blade mounting mechanism 4 are different. The caster 102 can be a universal wheel.

[0045] To achieve the above purpose or other purposes, the present invention also discloses a method for pneumatically installing a steam turbine blade, using the above-mentioned pneumatically installing device for steam turbine blades, and the steps are as follows:

[0046] A1: The operator moves the steam turbine blade pneumatic installation device to the blade installation location through the base 101 with casters 102, and puts the support legs 103 in contact with the ground to ensure the stability of the base 101;

[0047] A2: The operator drives the first rotary drive assembly 109, the second rotary drive assembly 110, and the suspension beam rotary drive assembly 108 to operate through the PLC in the control system. The motors in the first rotary drive assembly 109, the second rotary drive assembly 110, and the suspension beam rotary drive assembly 108 adjust the angle between the upper arm 105 and the column 104, and the angle between the forearm 106 and the upper arm 105, so that the filler strip installation mechanism 3 and the blade installation mechanism 4 are located on the upper side of the blade installation position; or, the operator can directly pull the filler strip installation mechanism 3 and the blade installation mechanism 4 by hand according to the actual production convenience needs, so as to adjust the angle between the upper arm 105 and the column 104, and the angle between the forearm 106 and the upper arm 105, and then lock the position angle of the above-mentioned rotary drive assemblies through the PLC.

[0048] A3: When installing the shim strip, the operator drives the tool suspension beam 107 to rotate by controlling the suspension beam rotation drive assembly 108, so that the shim strip installation mechanism 3 is at a suitable angle for operation (generally directly above the blade). The operator holds the handle 304 and pulls the shim strip installation mechanism 3 downward through the balancer 2, aligns the chisel 306 of the shim strip installation mechanism 3 with the shim strip, and presses the switch button 3041. The switch button 3041 controls the solenoid valve through the PLC in the control system to pass air into the impact cylinder 301. The piston end of the impact cylinder 301 drives the hammer 303 to hit the chisel 306, and the chisel 306 moves downward; during the downward movement, the U-shaped pin 3056 and the slip ring 3053 move downward together, and the compression spring 3054 is compressed. When the piston end of the impact cylinder 301 moves upward, the hammer 303 is separated from the chisel 306, and the compression spring 3054 is driven by the elastic force to drive the U-shaped pin 3056, the slip ring 3053, and the chisel 306 to move upward and reset, so that the chisel 306 can repeatedly hit the shim strip until the shim strip is hit to a qualified position;

[0049] A4: When striking the root of the blade, the operator drives the tool suspension beam 107 to rotate by controlling the suspension beam rotation drive assembly 108, so that the blade installation mechanism 4 is at a suitable angle for operation (generally directly above the blade). The operator holds the handle 304 and pulls the blade installation mechanism 4 downward through the balancer 2, and aligns the chisel 306 of the blade installation mechanism 4 with the root of the blade. At this time, the blade installation mechanism 4 descends and the gap filling strip installation mechanism 3 rises. Press the switch button 3041, and the switch button 3041 controls the solenoid valve through the PLC in the control system to pass air into the impact cylinder 301. The piston end of the impact cylinder 301 drives the hammer 303 to strike the chisel 306, and the chisel 306 moves downward; during the downward movement, the U-shaped pin 3056 and the slip ring 3053 move downward together, and the compression spring 3054 is compressed. When the piston end of the impact cylinder 301 moves upward, the hammer 303 is separated from the chisel 306, and the compression spring 3054 is driven by the elastic force to drive the U-shaped pin 3056, the slip ring 3053, and the chisel 306 to move upward and reset, so that the chisel 306 can repeatedly hit the root of the blade until the root of the blade is fitted to a qualified degree, and the gap size and torsion amount are within the specified range;

[0050] A5: When replacing the drill bit 306, the operator holds the pin pulling tool 307 so that the magnet 3071 at the end of the pin pulling tool 307 abuts against the U-shaped pin 3056. The magnet group 3072 generates a magnetic force on the U-shaped pin 3056 through the magnet 3071. The magnetic force is greater than the magnetic force between the U-shaped pin 3056 and the slip ring 3053. The operator pulls the U-shaped pin 3056 outward through the pin pulling body 3073 to separate the U-shaped pin 3056 from the slip ring 3053, that is, the U-shaped pin 3056 is removed from the limiting groove 3061. The drill bit 306 can be taken out from the drill bit fixing buffer assembly 305, and the replacement of the drill bit 306 is completed.

[0051] Furthermore, before executing step A1, the operator first adjusts the air pressure and frequency, and can set the gap filler installation mechanism 3 and the blade installation mechanism 4 to the inching mode or the continuous mode through the human-machine interface.

[0052] The pneumatic installation device and method of steam turbine blades disclosed by the present invention provides instant impact power through the impact cylinder 301 to hit the corresponding chisel 306. The bottom end of the chisel 306 is pressed against the shim strip or the root of the blade to achieve force transmission, so that the shim strip is compacted and the root of the blade is pressed to fit within the specified tolerance range. After each hitting, the compression spring 3054 resets the chisel 306, and the work is repeated to complete the assembly of multiple blades.

[0053] The pneumatic installation device and method of steam turbine blades of the present invention are provided with two balancers 2, and the gap filling strip installation mechanism 3 and the blade installation mechanism 4 are respectively arranged on the balancers 2, so that the weight of the two can be completely balanced, and the operation is light and convenient; the balancer 2 is connected to the mobile support mechanism 1 through a flexible rope, which is convenient for adjusting the striking angle. A U-shaped pin 3056, a magnet 3055, and a pin pulling tool 307 are provided, and the U-shaped pin 3056 is connected to the slip ring 3053 through the magnet 3055, and the magnetic force of the pin pulling tool 307 on the U-shaped pin 3056 is greater than the magnetic force between the U-shaped pin 3056 and the slip ring 3053, so that the U-shaped pin 3056 can be separated from the slip ring 3053, and the chisel 306 of different specifications can be replaced. The present invention is provided with a tool suspension beam 107, and the shim strip installation mechanism 3 and the blade installation mechanism 4 are both installed on the tool suspension beam 107. The shim strip installation and the blade installation are convenient to switch, which solves the problem in the prior art that the cantilever bracket can only suspend one striking tool, and the switching between the striking shim strip and the striking blade is inconvenient.

[0054] The present invention adopts a mobile support mechanism 1 to solve the problems of large floor space and inconvenient use in the prior art; adopts a gap filling strip installation mechanism 3 and a blade installation mechanism 4 with an impact cylinder 301 to solve the problems of high labor intensity and low installation efficiency in the prior art; adopts a U-shaped pin 3056, a magnet 3055, and a pin removal tool 307 to quickly replace the chisel 306, solving the problem of cumbersome replacement of the chisel 306 in the prior art. Starting from the current manual striking method, an impact cylinder 301 is used to replace manual striking, and a compact outer shell cover is designed to integrate the striking process action into one tool; considering that the device needs to move with the assembly station, a mobile support mechanism 1 with casters 102 is designed, and the striking tool is hung on the mobile support mechanism 1 through a balancer 2, so that the staff can easily pull the tool down for use; according to the striking process requirements, a convenient human-computer interaction system is designed, and parameters such as striking mode and striking frequency can be set, and the labor force is completely replaced by machines, which greatly reduces the production cycle and reduces the labor intensity of the staff.

[0055] Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0056] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A pneumatic installation device for steam turbine blades, characterized in that: The invention comprises a mobile support mechanism (1), a balancer (2), a gap filling strip mounting mechanism (3), a blade mounting mechanism (4), and a control system. The mobile support mechanism (1) comprises a base (101), a column (104), a large arm (105), and a small arm (106). A caster (102) is arranged on the bottom surface of the base (101). The bottom end of the column (104) is arranged on the base (101). The large arm (105) is hinged to the top end of the column (104). The small arm (106) is hinged to the top end of the column (104). At the end of the upper arm (105) away from the column (104), the shim strip mounting mechanism (3) and the blade mounting mechanism (4) are arranged at the end of the lower arm (106) away from the upper arm (105) through a balancer (2), and the heights of the shim strip mounting mechanism (3) and the blade mounting mechanism (4) are adjustable; the shim strip mounting mechanism (3) is used for striking the shim strip, and the blade mounting mechanism (4) is used for striking the root of the blade; and the control system is communicatively connected with the shim strip mounting mechanism (3) and the blade mounting mechanism (4).

2. The pneumatic installation device for steam turbine blades according to claim 1, characterized in that: The mobile support mechanism (1) also includes a support foot (103), a tool suspension beam (107), and a suspension beam rotation drive assembly (108), wherein the support foot (103) is connected to the base (101) and is used to support the base (101) on the ground; the tool suspension beam (107) is transmission-connected to the suspension beam rotation drive assembly (108), the gap-filling strip mounting mechanism (3) and the blade mounting mechanism (4) are arranged on the tool suspension beam (107), and the suspension beam rotation drive assembly (108) is arranged at the end of the forearm (106) away from the upper arm (105); the upper arm (105) and the column (104) are hinged via a first rotation drive assembly (109), and the forearm (106) and the upper arm (105) are hinged via a second rotation drive assembly (110); and the control system is communicatively connected to the first rotation drive assembly (109), the second rotation drive assembly (110), and the suspension beam rotation drive assembly (108), respectively.

3. The pneumatic installation device for steam turbine blades according to claim 1, characterized in that: The caulking strip installation mechanism (3) comprises a lower cover shell (302), an impact cylinder (301), a hammer (303), a handle (304), a switch button (3041), and a drill bit fixing buffer assembly (305); the lower cover shell (302) is a hollow part; the impact cylinder (301) is arranged in the lower cover shell (302); the hammer (303) is connected to the piston end of the impact cylinder (301); the handle (304) is arranged on the outer peripheral surface of the lower cover shell (302), and the switch button (3041) is integrated on the handle (304); the switch button (3041) is connected to the control system for communication; the drill bit fixing buffer assembly (305) is arranged at the bottom of the lower cover shell (302) and is located at the lower side of the hammer (303).

4. The pneumatic installation device for steam turbine blades according to claim 3 is characterized in that: The caulking strip installation mechanism (3) further comprises an upper cover shell (308), wherein the upper cover shell (308) is located above the lower cover shell (302), and the fixed end of the impact cylinder (301) is arranged inside the upper cover shell (308).

5. The pneumatic installation device for steam turbine blades according to claim 3, characterized in that: The brazing tool fixing and buffering assembly (305) comprises a base (3051), a fixing cover plate (3052), a slip ring (3053), a compression spring (3054), and a U-shaped pin (3056); the base (3051) is a hollow member, the base (3051) is arranged at the bottom of the lower cover (302), the fixing cover plate (3052) is arranged on the top surface of the base (3051), the slip ring (3053) is slidably arranged in the base (3051), and the compression spring (3054) is arranged between the bottom surface of the slip ring (3053) and the bottom surface of the base (3051); the brazing tool (3051) is a hollow member, the base (3051) is arranged at the bottom of the lower cover (302), the fixing cover plate (3052) is arranged on the top surface of the base (3051), the slip ring (3053) is slidably arranged in the base (3051), and the compression spring (3054) is arranged between the bottom surface of the slip ring (3053) and the bottom surface of the base (3051); 6) is installed in the brazing rod fixing buffer assembly (305), a limiting groove (3061) is provided on the outer periphery of the brazing rod (306), the U-shaped pin (3056) is inserted into the limiting groove (3061), and a magnet (3055) is further provided between the end of the U-shaped pin (3056) and the slip ring (3053), the magnet (3055) is fixedly connected to the slip ring (3053), and the magnet (3055) is adsorbedly connected to the end of the U-shaped pin (3056); the brazing rod (306) passes through the fixed cover plate (3052), the slip ring (3053), and the base (3051) in sequence from top to bottom.

6. The pneumatic installation device for steam turbine blades according to claim 5, characterized in that: The invention also comprises a pin pulling tool (307), wherein the pin pulling tool (307) comprises a magnet (3071), a magnet group (3072), and a pin pulling body (3073), wherein the magnet (3071) and the magnet group (3072) are both arranged on the pin pulling body (3073), and the magnet (3071) is in contact with the magnet group (3072).

7. The pneumatic installation device for steam turbine blades according to claim 6, characterized in that: The magnetic force between the magnetic conductor (3071) and the U-shaped pin (3056) is greater than the magnetic force between the U-shaped pin (3056) and the slip ring (3053).

8. The pneumatic installation device for steam turbine blades according to claim 3, characterized in that: The control system comprises an air circuit control loop, a PLC, a plurality of pressure regulating valves, and a plurality of solenoid valves. The plurality of pressure regulating valves are arranged in the air circuit control loop and are used to control the air pressure of the shim strip mounting mechanism (3) and the blade mounting mechanism (4). One end of the air circuit control loop is connected to the gas, and the other end is connected to the impact cylinder (301) in the shim strip mounting mechanism (3) and the blade mounting mechanism (4) through the plurality of solenoid valves. The PLC is communicatively connected to the switch button (3041), the solenoid valve, the first rotation drive assembly (109), the second rotation drive assembly (110), and the suspension beam rotation drive assembly (108).

9. A method for pneumatically installing a steam turbine blade, using the pneumatically installing a steam turbine blade according to any one of claims 1 to 8, characterized in that: Here are the steps: S1: An operator moves the steam turbine blade pneumatic installation device to a blade installation location via a base (101) with casters (102); S2: The operator adjusts the angle between the upper arm (105) and the column (104), and the angle between the lower arm (106) and the upper arm (105), so that the shim strip mounting mechanism (3) and the blade mounting mechanism (4) are located above the blade mounting position; and adjusts the air pressure of the shim strip mounting mechanism (3) and the blade mounting mechanism (4); S3: lowering the shim strip installation mechanism (3) through the balancer (2), rotating the tool suspension beam (107) in the mobile support mechanism (1) to a suitable position, and starting the shim strip installation mechanism (3), so that the shim strip installation mechanism (3) performs striking installation on the shim strip; S4: The gap filling strip installation mechanism (3) is raised through the balancer (2), the blade installation mechanism (4) is lowered, the tool suspension beam (107) in the mobile support mechanism (1) is rotated to a suitable position, and the blade installation mechanism (4) is started, and the blade installation mechanism (4) is struck and installed on the root of the blade.

10. The method for aerodynamically installing a steam turbine blade according to claim 9, characterized in that: The frequency of the shim strip installation mechanism (3) in step S3 striking and installing the shim strip, and the frequency of the shim strip installation mechanism (4) in step S4 striking and installing the blade root can be adjusted by the control system.

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