Suspension type hydro-generator arc-shaped key dismounting device

Abstract

The utility model discloses a suspension type hydro-generator arc-shaped key dismounting device which comprises a main shaft, an umbrella-shaped stress frame body, a thrust block and a clamping ring are arranged on the outer surface of the main shaft, the clamping ring is located on the upper surface of the thrust block, and a swing vibration type separator and a clamping mechanism are arranged on the umbrella-shaped stress frame body. The umbrella-shaped stress frame body is divided into an upper layer and a lower layer, a plurality of arc-shaped grooves and round grooves are formed in the lower surface of the upper layer and the upper surface of the lower layer, the swing vibration type separators are movably connected into the arc-shaped grooves, and a plurality of supporting columns are further arranged between the upper layer and the lower layer. The upper portion and the lower portion of the supporting column are fixedly installed in the circular groove, a square hole is formed in the supporting column, a clamping mechanism is arranged in the square hole, and a plurality of partition plates are arranged on the thrust block. By means of the structure, the problems of potential safety hazards, inaccurate striking positions, ring key deformation and scrapping, equipment damage, high noise and the like existing in a traditional dismounting method are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydroelectric power generation equipment, in particular to an arc-shaped key disassembly device for a suspended hydro-turbine generator. Background Art

[0002] The arc ring key is embedded in the main shaft of the hydro-turbine generator. It is a key component in the hydro-turbine generator set. The arc ring key bears the variable vertical dynamic downward extrusion pressure (≥100t) generated when the main shaft of the hydro-turbine generator is running. Under the action of extrusion gravity, the arc ring key undergoes plastic deformation (the arc ring key is made of Q235), forcing the metal particles on the surface of the arc ring key to be pressed into the peak value of the contact surface roughness of the thrust head (the thrust head can be seen as a thrust bearing, made of ZG20MnSi) and penetrate into the peak value of the surface roughness of the groove of the embedded main shaft, causing the friction force of the contact surface of the arc ring key, thrust head and main shaft groove to evolve into a bonding force. Therefore, removing the arc ring key becomes the biggest problem in the maintenance of the hydro-turbine unit.

[0003] The traditional disassembly method is usually to lift the hammer by a crane, and then manually push the hammer, using the inertial force of the hammer to impact the wedge at the front end of the hammer, so as to cut and tear the combination of the arc ring key with the thrust head and the main shaft, and finally achieve the purpose of disassembly. However, the use of cranes and hammers has serious safety hazards. First, the wedge is easy to break and fly out, causing casualties. Secondly, manually pushing the hammer is a kind of movement without a track, which is easy to cause inaccurate hitting the target position, thereby causing injuries. In addition, after the wedge expands the arc ring key, the edge of the arc ring key is hit with the hammer, which is easy to cause serious deformation of the ring key or even scrap. In addition, the inertial impact force of the hammer will cause the main shaft of the generator to deviate, resulting in equipment damage. Finally, the huge inertial force of the hammer impacts the wedge, causing the main shaft of the generator to emit noise as high as 100dB or more, seriously affecting the physical and mental health of the operator.

[0004] Therefore, we propose an arc key disassembly device for suspended hydro-turbine generator. Utility Model Content

[0005] The utility model provides a suspended hydro-turbine generator arc key disassembly device, which can effectively solve the safety hazards and efficiency problems existing in the traditional disassembly method.

[0006] In order to achieve the above-mentioned purpose, a suspended hydro-turbine generator arc key disassembly device is provided, which comprises a main shaft, an outer surface of the main shaft is provided with an umbrella-shaped force-bearing frame, a thrust head, and a clamping ring, the clamping ring is located on the upper surface of the thrust head, the umbrella-shaped force-bearing frame is provided with a swinging and vibrating separator and a clamping mechanism, the umbrella-shaped force-bearing frame is divided into an upper layer and a lower layer, the lower surface of the upper layer and the upper surface of the lower layer are provided with a plurality of arc-shaped grooves and circular grooves, the swinging and vibrating separator is movably connected in the arc-shaped groove, and a plurality of supporting members are also provided between the upper layer and the lower layer. The support column is fixedly installed in a circular groove at the top and bottom, a square hole is provided in the support column, a clamping mechanism is provided in the square hole, a plurality of partitions are provided on the thrust head, an eddy current induction heater is provided between each of the partitions, a plurality of circular through holes are provided at the bottom of the thrust head, a positioning rod is provided in the through hole, one end of the positioning rod is fixedly connected to the bottom of the eddy current induction heater, the target part can be heated during the disassembly process through the eddy current induction heater, so that the disassembly is smoother, the impact force on the wedge iron is reduced, thereby reducing noise and equipment damage.

[0007] According to the arc-shaped key disassembly device for a suspended hydro-turbine generator, the multiple arc-shaped grooves and circular grooves on the lower surface of the upper layer of the umbrella-shaped force-bearing frame should correspond to the positions of the multiple arc-shaped grooves and circular grooves of corresponding sizes on the upper surface of the lower layer. The umbrella-shaped force-bearing frame provides a stable supporting structure, making the entire disassembly process safer and more reliable.

[0008] According to the arc-key disassembly device for suspended hydro-turbine generator, the swing-vibration separator includes a separator, a vibration switch, an expander, a wedge iron, and a reversing valve. The expander is fixedly mounted on one end of the separator close to the retaining ring. The swing-vibration separator adopts a swing-vibration design, which can separate more accurately and avoid serious deformation or scrapping caused by inaccurate striking position in traditional methods.

[0009] According to the arc key disassembly device for suspended hydro-turbine generator, a reversing valve is provided above the separator, and the vibration switch is fixedly mounted at one end of the separator away from the clamping ring.

[0010] According to the arc key disassembly device for suspended hydro-turbine generator, a V-shaped groove is provided at one end of the expander away from the separator, and a wedge iron is movably connected in the V-shaped groove.

[0011] According to the arc key disassembly device for a suspended hydro-turbine generator, the clamping mechanism includes a fixed block, a screw, a clamping head, and a handwheel. The size of the fixed block matches the size of the square hole in the support column. Through the design of the clamping mechanism, the main shaft can be fixed, avoiding the deviation of the main shaft when using a swing hammer, and reducing the possibility of equipment damage.

[0012] According to the arc key disassembly device for a suspended hydro-turbine generator, a threaded hole is provided inside the fixing block, a screw is threadedly connected to the threaded hole, one end of the screw is fixedly connected to a clamping head, and the end of the screw away from the clamping head is fixedly connected to a handwheel. The design of the fixing block, the screw, the clamping head and the handwheel makes the clamping more precise and controllable, avoiding the risk of the wedge iron breaking and flying out and causing casualties in the traditional method.

[0013] The beneficial effects of the utility model are as follows: the swinging vibration separator adopts a swinging vibration design, which can separate the clamping ring more accurately, avoiding the serious deformation or scrapping problem caused by inaccurate hitting position in traditional methods; a reversing valve is provided on the separator of the swinging vibration separator, and the vibration switch is fixedly installed on the end of the separator away from the clamping ring. Through this design, free radial swinging within a range of 90° can be achieved, the maximum output thrust energy is 6T, the extension speed is 3M / min, and the stroke is 250mm, thereby enhancing the separation effect; a V-shaped groove is provided at the end of the expander of the swinging vibration separator away from the separator, and a wedge iron is movably connected in the V-shaped groove. This design can better control and position the wedge iron, avoiding the risk of the wedge iron breaking and flying out and causing casualties. Through the design and structural advantages of the swinging vibration separator, the safety hazards, inaccurate hitting position, ring key deformation and scrapping, equipment damage and high noise existing in the traditional disassembly method are solved, making the disassembly process safer, more accurate and efficient.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1 This is a structural diagram of the arc key disassembly device for the suspended hydro-generator of the utility model;

[0017] Figure 2 This is a structural diagram of a swing-vibration separator of an arc-key disassembly device for a suspended hydro-generator of the utility model;

[0018] Figure 3 This is a structural diagram of the clamping mechanism of the arc-shaped key disassembly device for the suspended hydro-generator of the utility model;

[0019] Figure 4 The utility model is a structural diagram of an eddy current induction heater of an arc key disassembly device for a suspended hydro-generator.

[0020] Legend:

[0021] 1. Spindle; 2. Umbrella-shaped force-bearing frame; 3. Swinging vibration separator; 4. Thrust head; 5. Eddy current induction heater; 6. Clamping mechanism; 7. Snap ring; 8. Separator; 9. Vibration switch; 10. Expander; 11. Wedge iron; 12. Fixed block; 13. Screw rod; 14. Clamping head; 15. Hand wheel; 16. Positioning rod; 17. Reversing valve. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0023] Example:

[0024] Reference Figures 1 to 4 The arc key disassembly device of the suspended hydro-turbine generator of the utility model embodiment comprises a main shaft 1, the outer surface of the main shaft 1 is provided with an umbrella-shaped force-bearing frame body 2, a thrust head 4, and a snap ring 7, the snap ring 7 is located on the upper surface of the thrust head 4, a swinging vibration separator 3 and a clamping mechanism 6 are provided on the umbrella-shaped force-bearing frame body 2, the umbrella-shaped force-bearing frame body 2 is divided into an upper layer and a lower layer, a plurality of arc-shaped grooves and circular grooves are provided on the lower surface of the upper layer and the upper surface of the lower layer, the swinging vibration separator 3 is movably connected in the arc-shaped groove, a plurality of supporting columns are also provided between the upper layer and the lower layer, the upper and lower parts of the supporting columns are fixedly installed in the circular grooves, a square hole is provided in the supporting column, a clamping mechanism 6 is provided in the square hole, a plurality of partitions are provided on the thrust head 4, an eddy current induction heater 5 is provided between each partition, a plurality of circular through holes are provided at the bottom of the thrust head 4, a positioning rod 16 is provided in the through hole, and one end of the positioning rod 16 is fixedly connected to the bottom of the eddy current induction heater 5.

[0025] The multiple arc grooves and circular grooves on the lower surface of the upper layer of the umbrella-shaped force-bearing frame 2 should correspond to the positions of the multiple arc grooves and circular grooves of corresponding sizes on the upper surface of the lower layer. The force points of the umbrella-shaped force-bearing frame 2 are evenly distributed, which helps to reduce the deformation of the force points and improve the durability of the device.

[0026] The swinging vibration separator 3 includes a separator 8, a vibration switch 9, an expander 10, a wedge iron 11, and a reversing valve 17. The expander 10 is fixedly installed at one end of the separator 8 near the retaining ring 7. The swinging vibration separator 3 can freely swing radially left and right within a range of 90°, which enables the device to adapt to arc keys in different positions and improves applicability. The maximum output thrust energy is 6T, the extension speed is 3M / min, and the stroke is 250mm. It has sufficient strength and speed to effectively disassemble the arc keys. The vibration frequency is 20HZ, the impact force is 146Kg, and the impact rod stroke is 50mm, which ensures the efficiency and accuracy of the device during the disassembly process.

[0027] A reversing valve 17 is provided above the separator 8 , and a vibration switch 9 is fixedly mounted on an end of the separator 8 away from the clamping ring 7 .

[0028] A V-shaped groove is provided at one end of the expander 10 away from the separator 8, and a wedge iron 11 is movably connected in the V-shaped groove.

[0029] The clamping mechanism 6 includes a fixed block 12, a screw rod 13, a clamping head 14, and a handwheel 15. The size of the fixed block 12 matches the size of the square hole in the support column. The clamping mechanism 6 can fix the clamping head 14 to the thrust head 4 from four sides according to the center position of the retaining ring 7, which ensures the stability and safety of the device during operation.

[0030] A threaded hole is provided inside the fixing block 12 , a screw rod 13 is threadedly connected in the threaded hole, one end of the screw rod 13 is fixedly connected to a clamping head 14 , and the end of the screw rod 13 away from the clamping head 14 is fixedly connected to a hand wheel 15 .

[0031] Working principle: First, hoist the device to the upper end of the main shaft 1 of the turbine generator, put the positioning plate into the groove at the end of the main shaft 1, and assemble the expander 10 to the protruding rod of the swing vibration separator 3; then, put the eddy current induction heater 5 into the groove of the thrust head 4 for heating, and after the thrust head 4 reaches the expansion temperature, use a copper hammer to gently hit the thrust head 4 to move it downward, and then hit the clamping ring 7 to move it downward; next, start the oil pump, adjust the oil pressure, connect the air source, move the double-sided follow-up reversing valve 17, so that the expander 10 presses the wedge iron 11 into the opening of the clamping ring 7; then, press the pneumatic switch to start the swing vibration separator 3, and through the action of the swing vibration separator 3, the clamping rings 7 on both sides are displaced outward until they are displaced one degree After a certain distance, retract the expander 10, remove the wedge iron 11, continue to squeeze and expand the opening until it is displaced a certain distance, retract the wedge iron 11, move the swinging vibration separator 3, so that the V-shaped opening of the expander 10 is aligned with the outer corners of the same retaining ring 7, and then alternately move the follow-up valves and the pressure-operated pneumatic switches on both sides to force the retaining ring 7 to twist out of the groove of the main shaft 1; finally, retract the expanders 10 on both sides to their original positions, move the swinging vibration separators 3 on both sides to the other side, and use the same method to push the retaining ring 7 on the other side out of the groove of the main shaft 1; after completing the above steps, turn off the oil pump, cut off the air source, remove the oil pipe, exit the tightening device, retract the clamping block into the force circle, and finally lift the umbrella-shaped force frame 2 to take out the retaining ring 7.

[0032] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A suspended hydro-turbine generator arc key disassembly device, comprising a main shaft (1), characterized in that: The outer surface of the main shaft (1) is provided with an umbrella-shaped force-bearing frame (2), a thrust head (4), and a snap ring (7); the snap ring (7) is located on the upper surface of the thrust head (4); the umbrella-shaped force-bearing frame (2) is provided with a swinging and vibrating separator (3) and a clamping mechanism (6); the umbrella-shaped force-bearing frame (2) is divided into an upper layer and a lower layer; the lower surface of the upper layer and the upper surface of the lower layer are provided with a plurality of arc-shaped grooves and circular grooves; the swinging and vibrating separator (3) is movably connected in the arc-shaped groove; the upper layer is provided with a plurality of arc-shaped grooves and a plurality of circular grooves ...; the upper layer is provided with a plurality of arc-shaped grooves; the upper A plurality of support columns are also provided between the upper layer and the lower layer, the upper and lower parts of the support columns are fixedly installed in the circular grooves, a square hole is provided in the support column, a clamping mechanism (6) is provided in the square hole, a plurality of partitions are provided on the thrust head (4), an eddy current induction heater (5) is provided between each of the partitions, a plurality of circular through holes are opened at the bottom of the thrust head (4), a positioning rod (16) is provided in the through holes, and one end of the positioning rod (16) is fixedly connected to the bottom of the eddy current induction heater (5).

2. The arc key disassembly device for suspended hydro-generator according to claim 1, characterized in that: The multiple arc-shaped grooves and circular grooves on the lower surface of the upper layer of the umbrella-shaped force-bearing frame (2) should correspond to the positions of the multiple arc-shaped grooves and circular grooves of corresponding sizes on the upper surface of the lower layer.

3. The arc key disassembly device for suspended hydro-generator according to claim 1, characterized in that: The swing vibration separator (3) comprises a separator (8), a vibration switch (9), an expander (10), a wedge iron (11), and a reversing valve (17); the expander (10) is fixedly mounted on one end of the separator (8) close to the clamping ring (7).

4. The arc key disassembly device for suspended hydro-generator according to claim 3, characterized in that: A reversing valve (17) is provided above the separator (8), and the vibration switch (9) is fixedly mounted on an end of the separator (8) away from the clamping ring (7).

5. The arc key disassembly device for suspended hydro-generator according to claim 3, characterized in that: A V-shaped groove is provided at one end of the expander (10) away from the separator (8), and a wedge iron (11) is movably connected in the V-shaped groove.

6. The arc key disassembly device for suspended hydro-generator according to claim 1, characterized in that: The clamping mechanism (6) comprises a fixing block (12), a screw rod (13), a clamping head (14), and a hand wheel (15); the size of the fixing block (12) matches the size of the square hole in the support column.

7. The arc key disassembly device for suspended hydro-generator according to claim 6, characterized in that: A threaded hole is provided inside the fixing block (12), a screw rod (13) is threadedly connected inside the threaded hole, one end of the screw rod (13) is fixedly connected to a clamping head (14), and one end of the screw rod (13) away from the clamping head (14) is fixedly connected to a hand wheel (15).

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