Turbine pre-twisted blade assembly equipment

Abstract

The steam turbine pre-twisted blade assembling equipment comprises a supporting mechanism which is fixedly arranged on a base and can ascend and descend, a pitching mechanism is arranged at the top of the supporting mechanism, the pitching mechanism rotates around the Z-axis direction, and the pitching mechanism can vertically swing around the Y-axis; a suspension arm capable of rotating around the Z axis is arranged at the end of the pitching mechanism, a rotatable striking mechanism used for striking the gap filling strip and the root of the pre-twisted blade is hoisted at the tail end of the suspension arm, and the end of the striking mechanism can swing around the X direction; the pitching mechanism drives the striking mechanism to do pitching swing around the Y-axis direction through the suspension arm; a handle is arranged on the striking mechanism, and a first control button and a second control button are arranged close to the handle; the pitching mechanism and the brake assembly on the suspension arm are electrically connected with the first control button; and the second control button is electrically connected with the striking mechanism. According to the invention, stable and accurate positioning can be realized, the operation intensity of constructors is greatly reduced, the construction safety is improved, and the production efficiency is effectively improved.

Description

Technical Field

[0002] The invention relates to the field of steam turbine assembly, in particular to a steam turbine pre-twisted blade assembly device. Background Art

[0003] A steam turbine is a rotary steam-powered device consisting of a rotor and a stator. High-temperature and high-pressure steam passes through a fixed nozzle and becomes an accelerated airflow, which is then sprayed onto the blades, causing the rotor equipped with the blade row to rotate and at the same time perform work externally, converting the kinetic energy of the steam into mechanical energy. The pre-twisted blades of a steam turbine are usually installed on the moving blade part of the steam turbine, where the moving blades are the part of the steam turbine that receives the high-speed steam flow ejected from the stationary blade grid and converts the kinetic energy of the steam into the mechanical energy of the shaft rotation, causing the rotor to rotate. In this process, the pre-twisted blades can improve the vibration performance and operational safety of the moving blades. The assembly of pre-twisted blades is an important link to ensure that they can effectively improve the vibration performance and operational safety of the moving blades.

[0004] In the prior art, the manual hammering method is usually used to assemble the pre-twisted blades of the steam turbine at home and abroad. During the assembly process of the pre-twisted blades, it is necessary to slide the shim strips and the pre-twisted blades into the blade slots on the rotor, and press and deform the shim strips by knocking to make them close to the root of the pre-twisted blades, ensuring that the pre-twisted blades are expanded in the blade slots, and then the root of the torque blades is knocked to make it twisted and close to the root of the previous pre-twisted blades. However, due to the large size of the steam turbine rotor, the pre-twisted blades are long and heavy. During the assembly process, the larger pre-twisted blades require two operators to cooperate with each other. One operator holds a tightening tool against the root of the pre-twisted blade, and the other operator needs to stand on a high platform and swing a hammer to knock the tightening tool, and the tightening tool transmits the hammering force to the root of the pre-twisted blade. It can be seen that the traditional manual knocking assembly method is not only labor-intensive, but also prone to work-related accidents, making it difficult to ensure the personal safety of the operators.

[0005] In addition, the Chinese invention patent with the authorization announcement number "CN107060895B" and the name "Pre-twisted blade assembly tool and device" specifically discloses "including: a first force transmission rod; a second force transmission rod, the length direction of which is the same as the length direction of the first force transmission rod, and the second force transmission rod is connected to the first force transmission rod to form an integral rod shape; a shim strip clamping end, which is arranged at the end of the first force transmission rod; a blade root clamping end, which is arranged at the end of the second force transmission rod; a first hammering part, which is arranged on one side of the connection between the first force transmission rod and the second force transmission rod; the second hammering part is arranged on the other side of the connection between the first force transmission rod and the second force transmission rod, wherein the end face of the shim strip clamping end is a semicircular face, and there is a certain angle between the end face of the blade root clamping end and the length direction of the second force transmission rod". This invention reduces the frequency of tool replacement by operators during the assembly process and improves work efficiency to a certain extent, but it still achieves the transmission of hammering force through the force transmission rod by purely manual striking of the hammering part, which is time-consuming and labor-intensive, and prone to work-related accidents. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is mainly to provide a turbine pre-twisted blade assembly device to improve the assembly efficiency, while avoiding the assembly of pre-twisted blades by manual knocking, thereby reducing the labor intensity of operators.

[0007] The present invention proposes a steam turbine pre-twisted blade assembly device, comprising a support mechanism fixed on a base and capable of being raised and lowered, a pitch mechanism being provided on the top of the support mechanism, the pitch mechanism rotating around the Z-axis direction, and the pitch mechanism being capable of swinging up and down around the Y-axis; a suspension arm being capable of rotating around the Z-axis is provided at the end of the pitch mechanism, a rotatable striking mechanism for striking a gap-filling strip and a root of a pre-twisted blade is suspended at the end of the suspension arm, and the end of the striking mechanism being capable of swinging around the X-direction; the pitch mechanism drives the striking mechanism to make a pitch swing around the Y-axis direction via the suspension arm; a handle is provided on the striking mechanism, and a first control button and a second control button are provided near the handle; the brake assembly on the pitch mechanism and the suspension arm is electrically connected to the first control button; and the second control button is electrically connected to the striking mechanism.

[0008] Preferably, the striking mechanism includes a connecting rod, a mounting seat and a striking assembly, one end of the connecting rod is rotatably connected to the end of the suspension arm along the Z-axis direction, and the other end of the connecting rod is hinged to the mounting seat so that the mounting seat swings around the X-axis; the striking assembly is hinged to the mounting seat so that the striking assembly swings around the Y-axis.

[0009] Preferably, the pitch mechanism includes a lifting arm and a first driving unit, the lifting arm is rotatably arranged on the supporting mechanism through a frame, and the lifting arm is hinged to the frame along the Y-axis so that the lifting arm swings around the Y-axis; the first driving unit is fixed to the frame, the movable end of the first driving unit is connected to one end of the lifting arm, and the other end of the lifting arm is rotatably connected to the suspension arm to provide a balancing torque to enable the lifting arm to hover arbitrarily.

[0010] Preferably, a second brake is provided at the connection between the lifting arm and the suspension arm, for controlling the suspension arm to rotate and stop around the Z axis.

[0011] Preferably, the lifting arm swings up and down around the Y-axis within a range of -36° to 36°.

[0012] Preferably, the striking assembly includes a second driving unit, a striking component, an anti-slipping unit and a fixed plate, the fixed plate is hinged on the mounting seat, the striking component is axially slidably arranged on the fixed plate, and the anti-slipping unit is used to limit the lowest stroke position of the striking component on the fixed plate to prevent the striking component from detaching from the fixed plate under the action of gravity; the second driving unit is fixed to the fixed plate, and is used to hammer the striking component to provide impact force to the filling strip or pre-twisted blade abutted by the striking component.

[0013] Preferably, the anti-slip part includes an anti-slip plate, a reset piece and a sliding seat for connecting the striking component, the sliding seat is axially slidably arranged on the fixed plate, reset pieces are fixedly provided on both sides of the movable end of the second driving part, and the side wall of the anti-slip plate is axially provided with a reset groove, one end of the anti-slip plate is engaged with the reset piece through the reset groove, and the second driving part drives the reset piece to move axially in the reset groove, and the other end of the anti-slip plate is detachably connected to the sliding seat; in a non-striking state, the reset piece abuts against the top wall of the reset groove.

[0014] Preferably, the anti-detachment part includes a first stopper and a fixing seat, the fixing seat is detachably connected to the fixing plate, the striking component penetrates the fixing seat axially and moves up and down axially, the first stopper is detachably connected to the striking component, and the first stopper is located at the top of the fixing seat; in a non-striking state, the first stopper abuts against the top of the fixing seat.

[0015] Preferably, the mounting base includes an adjusting portion, a support and a suspension frame, the striking assembly is hinged to the suspension frame, and the support is fixed to the suspension frame, so that the striking assembly can swing around the Y-axis; the adjusting portion is hinged to the support along the Y-axis direction, and the connecting rod is fixedly connected to the adjusting portion along the Z-axis direction, and the suspension frame is adjusted by the adjusting portion to drive the striking assembly to swing around the X-axis.

[0016] Preferably, the adjustment part includes an adjustment seat, a first adjustment member and a second adjustment member, the adjustment seat is hinged on the support so that the support swings along the Y-axis; the first adjustment member and the second adjustment member are movably arranged on the adjustment seat, the bottom of the first adjustment member and the second adjustment member abut against the top of the suspension frame, and the axial position of the first adjustment member and the second adjustment member is adjusted to control the support to swing along the Y-axis.

[0017] As described above, the present invention relates to a steam turbine pre-twisted blade assembly device, which has the following beneficial effects:

[0018] The present invention applies a driving force to the striking mechanism by an operator holding a handle, thereby driving the striking mechanism to move. During the displacement process, the striking mechanism can be linked with the suspension arm, the pitch mechanism and the support mechanism to realize rotation and movement in the X, Y and Z axis directions. When the striking mechanism moves to abut against the shim strip or the root of the pre-twisted blade and reaches a predetermined position, the brake assembly of the pitch mechanism and the suspension arm can be controlled by the first control button to fix the current position of the striking mechanism. Then, the striking mechanism is controlled by the second control button to hit the shim strip or the root of the pre-twisted blade to realize the assembly of the shim strip or the pre-twisted blade. The present invention can realize stable and accurate positioning of the parts to be struck of the shim strip and the pre-twisted blade, can greatly reduce the operating intensity of the construction personnel, improve the construction safety, and effectively improve the production efficiency and reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the operation of a device for assembling pre-twisted blades for a steam turbine provided in one embodiment of the present invention.

[0020] Figure 2 A schematic diagram of the three-dimensional structure of a device for assembling pre-twisted blades for a steam turbine provided in one embodiment of the present invention.

[0021] Figure 3 A schematic diagram of the transportation and storage of a device for assembling pre-twisted blades for a steam turbine provided in one embodiment of the present invention.

[0022] Figure 4 A three-dimensional schematic diagram of a striking mechanism provided by an embodiment of the present invention from a first viewing angle.

[0023] Figure 5 A three-dimensional schematic diagram of a striking mechanism provided by an embodiment of the present invention from a second viewing angle.

[0024] Figure 6 This is a schematic structural diagram of a guide portion provided in the first embodiment of the present invention.

[0025] Figure 7 A three-dimensional schematic diagram of a striking mechanism provided in the second embodiment of the present invention.

[0026] Figure 8 A schematic structural diagram of a guide portion provided in a second embodiment of the present invention.

[0027] Fig. 9 A front view of a striking mechanism according to an embodiment of the present invention adjusting the pitch angle during striking.

[0028] Description of reference numerals:

[0029] 100, base; 200, supporting mechanism; 300, pitch mechanism; 310, frame; 320, lifting arm; 330, first brake part; 340, first driving part; 350, second brake part; 400, suspension arm; 410, third brake part; 500, striking mechanism; 510, connecting rod; 520, mounting seat; 521, adjusting part; 5211, adjusting seat; 5212, first adjusting member; 5213, second adjusting member; 5 22. Support; 523. Suspension frame; 530. Striking assembly; 531. Second driving part; 5311. Reset member; 5312. Reset groove; 532. Striking component; 533. Anti-slip part; 5331. Sliding seat; 5332. Anti-slip plate; 5333. First stop member; 5334. Second stop member; 5335. Limit seat; 534. Fixing plate; 540. Handle; 541. First control button; 542. Second control button. DETAILED DESCRIPTION

[0030] 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.

[0031] 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 proportion 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 so on 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 the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0032] Implementation

[0033] like Figure 1-Figure 9As shown, an embodiment of a steam turbine pre-twisted blade assembly device includes a support mechanism 200 fixed on a base 100 and capable of being raised and lowered, and a pitch mechanism 300 is provided on the top of the support mechanism 200. The pitch mechanism 300 can rotate around the Z axis, and the pitch mechanism 300 can also rotate around the Y axis to achieve up and down swinging. A suspension arm 400 that can rotate around the Z axis is provided at the end of the pitch mechanism 300, and a rotatable striking mechanism 500 for striking the gap filler strip and the root of the pre-twisted blade is suspended at the end of the suspension arm 400, and the end of the striking mechanism 500 can do pitch swing around the X axis. The striking mechanism 500 is provided with a handle 540, which is L-shaped and / or U-shaped. A first control button 541 for fixing the position of the striking mechanism 500 and a second control button 542 for starting the striking mechanism 500 are provided near the handle 540, so that when the operator moves the striking mechanism 500 to a suitable position by means of the handle, the first control button 541 is closed to fix the current position of the striking mechanism 500. After the position of the striking mechanism 500 is fixed, the operator can easily press the second control button 542 to start the striking mechanism 500 to assemble the gap filler strips and pre-twisted blades to be assembled. The brake components on the pitch mechanism 300 and the suspension arm 400 are electrically connected to the first control button 541, and the second control button 541 is electrically connected to the striking mechanism.

[0034] Specifically, the support mechanism 200 includes a lifting column, one end of which is fixed on the base 100, and the other end is fixedly connected through a main shaft flange, and is rotatably connected to the pitch mechanism 300 through the main shaft flange. When the equipment needs to work, the lifting column can be raised to the highest position; when the equipment is idle, the lifting column can be lowered to the lowest position, such as Figure 3 The base 100 is provided with a plurality of transport holes, so that the center of gravity of the pitch mechanism 300 and the striking mechanism 500 can be lowered by the lifting column in this embodiment, and a forklift can be used to transport the device through the transport holes, thereby achieving the purpose of convenient transportation.

[0035] When in use, the operator first slides the pre-assembled pre-twisted blade into the blade slot, prevents the gap filling strip at the specified position, controls the support mechanism 200 through the control system to drive the pitch mechanism 300, the suspension arm 400 and the striking mechanism 500 to move to the highest position, and the operator holds the handle 540 and applies driving force by manual dragging to drive the suspension arm 400 and the pitch mechanism 300 to rotate a certain angle around the Z axis of the support mechanism 200 to get close to the gap filling strip to be installed. Then the striking mechanism 200 drives the suspension arm 400 to rotate a certain angle around the Z axis at the end of the pitch mechanism 300 to achieve further adjustment of the angle. At this time, if the striking mechanism is still not adjusted to the right position, the striking mechanism 500 can be rotated around the Z axis at the end of the suspension arm 400 to move the striking mechanism above the gap filling strip. Then the operator drives the striking mechanism 500 to drive the suspension arm 400 and the pitch mechanism 300 to swing downward around the Y axis, so that the striking mechanism 500 moves downward close to the gap filling strip. In this process, the striking mechanism 500 can also be swung around the X axis, the Y axis, and the Z axis to fine-tune the spatial position of the striking mechanism 500 until the end of the striking mechanism 500 abuts against the gap filling strip or the root of the pre-twisted blade, and the appropriate striking angle is reached. After the striking angle is adjusted, the operator fixes the current position of the striking mechanism 500 by pressing the first control button 541. Finally, the operator drives the striking mechanism 500 to strike the gap filling strip by pressing the second control button 541. Repeat the above operation to strike the gap filling strip to a suitable shape and position until the gap filling strip is tightened with the blade groove and the bottom of the pre-twisted blade. After the gap filling strip is installed, it is necessary to strike the root of the pre-twisted blade to obtain the torsion amount. In the same way, the striking mechanism is moved to the top of the pre-twisted blade root through the control system. Then, the operator fine-tunes the position of the striking mechanism 500 to achieve a suitable striking angle. Finally, the striking mechanism 500 is driven to strike the root of the pre-twisted blade, which is a one-time striking process. The above operation is repeated until the root of the pre-twisted blade is tightly attached to the root of the previous pre-twisted blade, so that the twist amount of the pre-twisted blade root and the gap size between the two blade roots meet the assembly requirements.

[0036] In one embodiment, if Figure 2As shown, the pitch mechanism 300 includes a frame 310, a lifting arm 320, a first brake part 330 and a first drive part 340. The frame 310 is rotatably connected to the top of the support mechanism 200 through a main shaft flange. The first brake part 330 is provided at the connection between the frame 310 and the support mechanism 200 so that the frame 310 remains stationary when rotating to a predetermined angle. One end of the lifting arm 320 is hinged to the frame 310 along the Y axis, and the other end of the lifting arm 320 is rotatably connected to the suspension arm 400, so that the lifting arm performs pitch swing around the Y axis. The first drive part 340 is fixed to the frame 310, and the movable end of the first drive part 340 is connected to the lifting arm 320. Among them, the overall shape of the lifting arm 320 is a quadrilateral, which can keep the striking mechanism 500 connected to the suspension arm 400 stably performing pitch motion. The first brake part 330 is preferably a main shaft brake, and the first drive part 340 is preferably a balancing cylinder to provide a balancing torque to allow the lifting arm (320) to arbitrarily hover.

[0037] When in use, when the rotation angle around the Z axis needs to be adjusted, the first brake part 330 is released to drag the frame 310 to rotate by a predetermined angle, and the first brake part 330 stops the frame 310 from rotating and keeps it stationary. When the pitch angle needs to be adjusted, the operator applies a driving force to the striking mechanism 500 by holding the handle to move it, thereby driving the suspension arm 400 and the lifting arm 320 to perform a pitch swing (i.e., swing up and down) around the Y axis, thereby achieving the striking mechanism 500 close to the root of the shim bar or the pre-twisted blade, so that it can strike the shim bar or the pre-twisted blade at a suitable angle.

[0038] Furthermore, if Figure 2 As shown, a second brake part 350 is also provided at the connection between the lifting arm 320 and the suspension arm 400, which is used to control the rotation and stop of the suspension arm 400 around the Z axis. The suspension arm 400 can rotate 360° around the Z axis. By quickly adjusting the direction of the suspension arm 400, the number of times the suspension arm moves the entire body can be reduced, thereby improving the working efficiency. At the same time, when working in a limited space, the rotation of the suspension arm can reduce interference with other objects and protect the robot arm and the surrounding environment.

[0039] Furthermore, the up and down swing angle range of the lifting arm 320 around the Y-axis is preferably -36° to 36°. Such a swing angle range can ensure that the lifting arm has sufficient coverage perpendicular to the horizontal plane, so that it can reach a higher or lower position for operation. At the same time, it can prevent the lifting arm 320 from swinging excessively during operation, thereby reducing safety risks.

[0040] In one embodiment, if Figure 2-Figure 5As shown, the striking mechanism 500 includes a connecting rod 510, a mounting seat 520 and a striking assembly 530. One end of the connecting rod 510 is rotatably connected to the end of the suspension arm 400 along the Z-axis direction, and the other end of the connecting rod 510 is hinged to the mounting seat 520, so that the mounting seat 520 swings around the X-axis. The striking assembly 530 is hinged to the mounting seat 520, so that the striking assembly 530 swings around the Y-axis. Among them, the handle 540 is fixed on the striking assembly 530, and the first control button 541 and the second control button 542 are arranged on the striking assembly 530. Among them, the third brake part 410 is provided at the connection between the connecting rod 510 and the suspension arm 400 to ensure that the striking mechanism 500 rotates around the Z-axis to a predetermined angle and stops.

[0041] During use, when the striking mechanism 500 moves to the gap-filling strip or the pre-twisted blade, the operator applies a driving force to the striking assembly 530 by holding the handle 540, and then drives the mounting seat 520 to swing around the X-axis as a whole through the striking assembly 530, so as to fine-tune the position of the striking assembly 530. When the position does not reach the appropriate position and the angle of the striking assembly 530 along the X-axis needs to be adjusted, the operator can also drive the striking assembly 530 to swing around the Y-axis of the mounting seat 520 by holding the handle, so as to further fine-tune the striking assembly 530.

[0042] Furthermore, if Figure 5 and Figure 7 As shown, the mounting base 520 includes an adjusting portion 521, a support 522 and a suspension frame 523. The suspension frame is provided with an opening at the bottom and through both sides. The striking assembly 530 is hinged to the suspension frame 523 through a rotating bracket, and a damping shaft is provided on the rotating bracket. The support 522 is fixedly mounted on the suspension frame 523, the adjusting portion 521 is hinged to the support 522 along the Y-axis direction, and the connecting rod 510 is fixedly connected to the adjusting portion 521 along the Z-axis direction. Through the adjustment of the adjusting portion 521, the suspension frame 523 drives the striking assembly 530 to swing around the X-axis.

[0043] When in use, if it is necessary to adjust the swing angle of the striking assembly 530 as a whole around the X-axis, the swing angle of the striking assembly 530 is fine-tuned through the adjustment portion 521 so that it can strike the gap-filling strip or the pre-twisted blade at a suitable angle.

[0044] Furthermore, if Figure 7As shown, the adjusting portion 521 includes an adjusting seat 5211, a first adjusting member 5212 and a second adjusting member 5213. The adjusting seat 5211 is hinged on the support 522 so that the support 522 swings along the Y-axis; the first adjusting member 5212 and the second adjusting member 5213 are movably arranged on the adjusting seat 5211 along the Z-axis, and the bottoms of the first adjusting member 5212 and the second adjusting member 5213 abut against the top of the suspension frame 523. The axial positions of the first adjusting member 5212 and the second adjusting member 5213 are adjusted so that the top of the suspension frame 523 is tilted at a certain angle toward the Y-axis side to achieve the control of the swing angle of the suspension frame 523 around the X-axis.

[0045] It should be noted that, in the non-swinging adjustment state, the bottom end of the first adjusting member 5212 and the bottom end of the second adjusting member 5213 are both on the same horizontal plane. When it is necessary to adjust the swing angle of the suspension frame 523 along the Y-axis direction, the bottom end of the first adjusting member 5212 and the bottom end of the second adjusting member 5213 can be adjusted from the same horizontal state to a state with a height difference by adjusting the axial position of the first adjusting member 5212 and the second adjusting member 5213. During the whole process, the suspension frame is always in contact with the bottom ends of the first adjusting member 5212 and the second adjusting member 5213, so that the top of the suspension frame is gradually transformed from a horizontal state to a state inclined at a certain angle to one side of the Y-axis, so as to realize the swing of the suspension frame 523 along one side of the Y-axis. When it is necessary to swing the suspension frame 523 along the other side of the Y-axis, the first adjusting member 5212 and the second adjusting member 5213 can be adjusted in the opposite direction as described above.

[0046] Furthermore, if Figure 5As shown, the striking assembly 530 includes a second driving part 531, a striking component 532, an anti-slipping part 533 and a fixing plate 534. The fixing plate 534 is hinged on the mounting seat 520, and the hinge point is preferably close to one end of the bottom of the mounting seat 520, so that the fixing plate 534 can swing around the Y axis. The anti-slipping part 533 is used to limit the lowest stroke position of the striking component 532 on the fixing plate 534 to prevent the striking component 532 from detaching from the fixing plate 534 under the action of gravity. The anti-slipping part 533 provides an anti-slipping function for the striking component 532 on the one hand, and also provides a reset function for the striking component 532 on the other hand. The second driving part 531 is axially fixed to the fixing plate 534. The second driving part 531 is axially parallel to the striking component 532 through the anti-slipping part 533, and the striking component 532 slides axially along the fixing plate 534. The second driving part 531 provides impact force to the shim strip or pre-twisted blade abutting against the striking part 532 by hammering the striking part 532. The specifications of the striking part 532 can be changed according to specific working conditions. The second driving part 531 is preferably an impact cylinder, the punch of the impact cylinder is arranged opposite to the striking part 532, and there is a spacing between the striking part 532 and the punch of the second driving part 531. The determination of the spacing can be flexibly adjusted according to the second driving part 531.

[0047] During use, when the striking assembly 530 is placed as a whole in a predetermined position, the striking component 532 abuts against the root of the filling strip or the pre-twisted blade, and the striking component 532 is struck axially by the punch of the second driving part 531. After the top of the striking component 532 is struck, it quickly impacts downward, and the striking component 532 is reset by the anti-slip part 533. This is a one-time striking process, and the striking process is repeated until the assembly requirements are met.

[0048] Furthermore, if Figure 6 As shown, the anti-slip part 533 includes an anti-slip plate 5332, a reset member and a slide seat 5331 for connecting the striking component 532, the slide seat 5331 is axially slidably arranged on the fixed plate 534, and reset members 5311 are fixedly arranged on both sides of the movable end of the second driving part 531, and the reset member 5311 includes but is not limited to a limit screw. The side wall of the anti-slip plate 5332 is axially provided with a reset groove 5312, one end of the anti-slip plate 5332 is engaged with the reset member 5311 through the reset groove 5312, and the second driving part 531 drives the reset member 5311 to move axially in the reset groove 5312, and the other end of the anti-slip plate 5332 is detachably connected to the slide seat 5331. In the non-hammering state, the reset member 5311 abuts against the top wall of the reset groove 5312 to prevent the striking component 532 from detaching from the slide seat 5331 under the action of gravity.

[0049] When in use, the bottom of the striking component 532 abuts against the shim strip or the root of the pre-twisted blade, and the punch of the second driving unit 531 strikes the striking component 532 to apply an impact force to the shim strip or the root of the pre-twisted blade. When the bottom of the striking component 532 contacts the shim strip or the root of the pre-twisted blade, the striking component 532 moves slightly upward along the slide rail with the slide seat under the action of the supporting reaction force. After the striking component 532 receives the impact, it drives the slide seat to move upward along the slide rail. Under the action of the gravity of the striking component 532 itself, the top of the reset groove abuts against the reset member, thereby achieving the reset of the striking component 532. At the same time, during the hammering process, the reset groove can effectively limit the stroke of the striking component 532 to avoid over-travel movement.

[0050] Embodiment 2

[0051] The second embodiment is substantially the same as the first embodiment, and the difference between the second embodiment and the first embodiment is that: Figure 7 and Figure 8 As shown, the anti-slip portion 533 includes a first stopper 5333, a second stopper 5334 and a fixing seat 5335. The fixing seat 5335 includes but is not limited to being connected to the fixing plate 534 by a threaded connection. The striking component 532 axially penetrates the fixing seat 5335, and the striking component 532 can slide up and down along the axial direction. The first stopper 5333 and the second stopper 5335 are both detachably connected to the striking component 532. The first stopper 5333 is located at the top of the fixing seat 5335, and the second stopper 5334 is located at the bottom of the fixing seat. The distance between the first stopper 5333 and the second stopper 5334 is greater than the length of the fixing seat 5335 along the axial direction. The distance between the first stopper 5333 and the second stopper 5334 can be determined according to the stroke of the striking component 532 under specific working conditions. When the striking component 532 is in a non-striking state, the first stopper 5333 abuts against the top of the fixing seat 5335 to prevent the striking component 532 from being separated from the fixing seat, and a gap (i.e., the maximum stroke of the striking component 532) is provided between the second stopper 5334 and the bottom of the fixing seat 5335. The sizes of the second limit plate 5333 and the third limit plate 5334 are slightly larger than the limit seat 5335, and the cross-sections of the ends of the striking component 532 and the second limit plate 5333 and the third limit plate 5334 at the joints are both rectangular, which can effectively prevent the striking component 532 from rotating in the circumferential direction during the impact process.

[0052] When in use, the striking component 532 is brought into contact with the shim strip or the pre-twisted blade at a suitable position, and the striking component 532 is moved upward in the axial direction until the third limit plate 5334 is brought into contact with the bottom of the fixed seat 5335, at which time the second limit plate 5333 is slightly moved upward in the axial direction with the striking component 532. The top of the striking component 532 is struck downward in the axial direction by the second driving part 531, and the striking component 532 is impacted to provide an impact force to the root of the shim strip or the pre-twisted blade. When the striking component 532 is impacted, under the action of the supporting reaction force of the root of the shim strip or the pre-twisted blade abutting against it, the striking component 532 drives the second limit plate 5333 to move upward in the axial direction, and resets under the action of the gravity of the striking component 532, that is, the second limit plate 5333 is brought into contact with the fixed seat 5335. After the impact is over, the striking component 532 returns to its initial position (that is, the second limit plate 5333 is brought into contact with the top of the fixed seat 5335) due to its own gravity. Repeat this operation until the shim strip and pre-twisted blade meet the assembly requirements.

[0053] In summary, the present invention controls the supporting mechanism, the pitching mechanism and the suspension arm to be linked through the control system, drives the striking mechanism to approach the gap filling strip or the pre-twisted blade, and fine-tunes the striking mechanism by swinging it around the Y axis, so that the end of the striking mechanism abuts against the gap filling strip or the pre-twisted blade, and finally the gap filling strip and the root of the pre-twisted blade are knocked in turn by the striking mechanism to complete the installation of the pre-twisted blade. The present invention can achieve stable and accurate positioning of the gap filling strip and the pre-twisted blade to be struck, can greatly reduce the operating intensity of the construction personnel, improve the construction safety, and effectively improve the production efficiency and reduce the cost.

[0054] 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 steam turbine pre-twisted blade assembly device, characterized in that: The invention comprises a support mechanism (200) fixed on a base (100) and capable of being raised and lowered, wherein a pitch mechanism (300) is provided on the top of the support mechanism (200), wherein the pitch mechanism (300) rotates around the Z axis and can swing up and down around the Y axis; a suspension arm (400) is provided at the end of the pitch mechanism (300) and capable of rotating around the Z axis, wherein a striking mechanism (500) is rotatably mounted at the end of the suspension arm (400) and is used for striking a gap filler strip and a pre-twisted blade root, and wherein the striking mechanism (500) 0) can perform pitching and swinging around the X-axis; the striking mechanism (500) is provided with a handle (540), and a first control button (541) for fixing the position of the striking mechanism (500) and a second control button (542) for starting the striking mechanism (500) are provided near the handle (540); the braking components on the pitching mechanism (300) and the suspension arm (400) are electrically connected to the first control button (541), and the second control button (542) is electrically connected to the striking mechanism (500).

2. The steam turbine pre-twisted blade assembly equipment according to claim 1, characterized in that: The striking mechanism (500) comprises a connecting rod (510), a mounting seat (520) and a striking assembly (530); one end of the connecting rod (510) is rotatably connected to the end of the suspension arm (400) along the Z-axis direction, and the other end of the connecting rod (510) is hinged to the mounting seat (520) so that the mounting seat (520) can swing around the X-axis; the striking assembly (530) is hinged to the mounting seat (520) so that the striking assembly (530) can swing around the Y-axis.

3. The steam turbine pre-twisted blade assembly equipment according to claim 1, characterized in that: The pitch mechanism (300) comprises a lifting arm (320) and a first driving unit (340); the lifting arm (320) is rotatably arranged on the supporting mechanism (200) via a frame (310), and the lifting arm (320) is hinged to the frame (310) along a Y-axis so that the lifting arm (320) swings around the Y-axis; the first driving unit (340) is fixed to the frame (310), the movable end of the first driving unit (340) is connected to one end of the lifting arm (320), and the other end of the lifting arm (320) is rotatably connected to the suspension arm (400) so as to provide a balancing torque so that the lifting arm (320) can hover arbitrarily.

4. The steam turbine pre-twisted blade assembly equipment according to claim 3, characterized in that: A second braking portion (350) is also provided at the connection between the lifting arm (320) and the suspension arm (400), which is used to control the suspension arm (400) to rotate and stop around the Z axis.

5. The steam turbine pre-twisted blade assembly equipment according to claim 3 or 4, characterized in that: The lifting arm (320) swings up and down around the Y axis in an angle range of -36° to 36°.

6. The steam turbine pre-twisted blade assembly equipment according to claim 2, characterized in that: The striking assembly (530) comprises a second driving portion (531), a striking component (532), an anti-slipping portion (533) and a fixing plate (534); the fixing plate (534) is hinged to the mounting seat (520); the striking component (532) is axially slidably arranged on the fixing plate (534); the anti-slipping portion (533) is used to limit the lowest stroke position of the striking component (532) on the fixing plate (534) to prevent the striking component (532) from detaching from the fixing plate (534) under the action of gravity; the second driving portion (531) is fixed to the fixing plate (534) and is used to hammer the striking component (532) to provide an impact force to the shim strip or pre-twisted blade abutted by the striking component (532).

7. The steam turbine pre-twisted blade assembly equipment according to claim 6, characterized in that: The anti-slip part (533) includes an anti-slip plate (5332), a reset piece and a slide seat (5331) for connecting the striking component (532); the slide seat (5331) is axially slidably arranged on the fixed plate (534); reset pieces (5311) are fixedly arranged on both sides of the movable end of the second driving part (531); a reset groove (5312) is axially provided on the side wall of the anti-slip plate (5332); one end of the anti-slip plate (5332) is engaged with the reset piece (5311) through the reset groove (5312); the second driving part (531) drives the reset piece to move axially in the reset groove (5312); the other end of the anti-slip plate (5332) is detachably connected to the slide seat (5331); in a non-slip state, the reset piece (5311) abuts against the top wall of the reset groove (5312).

8. The steam turbine pre-twisted blade assembly equipment according to claim 6, characterized in that: The anti-slip portion (533) includes a first stopper (5333) and a fixing seat (5335); the fixing seat (5335) is detachably connected to the fixing plate (534); the striking component (532) penetrates the fixing seat (5335) axially and moves up and down axially; the first stopper (5333) is detachably connected to the striking component (532), and the first stopper (5333) is located at the top of the fixing seat (5335); when the striking component (532) is in a non-striking state, the first stopper (5333) abuts against the top of the fixing seat (5335).

9. The steam turbine pre-twisted blade assembly equipment according to claim 2, characterized in that: The mounting seat (520) comprises an adjusting portion (521), a support (522) and a suspension frame (523); the striking assembly (530) is hinged on the suspension frame (523) so that the striking assembly (530) can swing around the Y-axis; the support (522) is fixedly mounted on the suspension frame (523); the adjusting portion (521) is hinged on the support (522) along the Y-axis direction; the connecting rod (510) is fixedly connected to the adjusting portion (521) along the Z-axis direction; and the suspension frame (523) is adjusted by the adjusting portion (521) so that the striking assembly (530) can swing around the X-axis.

10. The steam turbine pre-twisted blade assembly equipment according to claim 9, characterized in that: The adjusting portion (521) comprises an adjusting seat (5211), a first adjusting member (5212) and a second adjusting member (5213); the adjusting seat (5211) is hinged on the support (522) so that the support (522) swings along the Y-axis; the first adjusting member (5212) and the second adjusting member (5213) are movably arranged on the adjusting seat (5211) along the Z-axis, the bottom of the first adjusting member (5212) and the second adjusting member (5213) are in contact with the top of the suspension frame (523), and the axial positions of the first adjusting member (5212) and the second adjusting member (5213) are adjusted to control the swing angle of the suspension frame (523) around the X-axis.

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