A Method for Installing a Coupling of a Diesel Generator Set

Abstract

The present invention discloses a method for installing a coupling of a diesel generator set. A self-made lifting hook is used to hook the screw hole of the bushing and moved to a heater with a preset heating temperature to heat the bushing of the coupling. A self-made handling tool is screwed into the screw hole of the bushing. While hooking and moving the bushing, by adjusting the positions of the self-made lifting hook and the self-made handling tool up, down, left, and right, the bushing of the heavy, high-temperature and high-heat generator coupling is aligned with the rotating shaft of the generator. The self-made lifting hook is removed, and the heavy, high-temperature and high-heat bushing is pushed to the root of the rotating shaft of the generator by using the self-made handling tool. The self-made handling tool is screwed out. After the bushing cools down, the rubber roller is moved to the rotating shaft of the generator, and the rubber roller and the bushing are fixed together with a locking bolt by means of a self-made clamping plate and a self-made wrench. The method for installing the coupling of the diesel generator set of the present invention can improve the assembly efficiency and ensure the safety of the assembly personnel at the same time.

Description

Technical Field

[0001] The invention relates to a method for installing a coupling of a diesel generator set. Background Art

[0002] The engineers and technicians who assemble the generator sets are well aware that there are two ways to assemble and connect the generator sets: the first is a single-point connection, which is to connect directly with steel sheets. This connection method has low vibration and high concentricity. The second is a double-point connection, which is connected with a coupling. This connection method is suitable for various models. Coupling connection is mostly used for high-power generator sets, especially the high-voltage generator sets used in data centers. The connection between the engine and the generator of the high-voltage generator set is basically connected by a coupling. When the generator set is connected and assembled, the importance of the coupling and the generator connection assembly is particularly obvious; the coupling and the generator connection assembly are mainly sleeve installation and rubber roller installation; sleeve installation is an interference fit installation, and the rubber roller installation is to install it on the sleeve that has been fixed on the generator shaft.

[0003] Engineering technicians with common sense of mechanical assembly know that:

[0004] Interference means that the difference between the size of the hole and the size of the matching shaft is negative. Interference fit refers to a fit with interference (including the minimum interference equal to zero). At this time, the tolerance zone of the hole is below the tolerance zone of the shaft. The algebraic difference between the size of the hole in each direction and the size of the matching shaft in each direction is an interference fit when this difference is negative. This type of structure is simple, has good coaxiality, and can withstand large axial forces, torques and dynamic loads. However, it requires high machining accuracy for the matching surface and is inconvenient to assemble.

[0005] The interference fit is generally achieved by press fit, shrink fit and cold fit.

[0006] Press-fitting refers to the press-fitting under room temperature with interference fit. It is suitable for several static fits with small interference. It is easy to operate and quick to act. It is the most commonly used method. According to the different ways of applying force, press-fitting is divided into two methods: hammering method and press-in method. The hammering method is mainly used for connectors with low requirements on the matching surface, short length, and transition fit. The press-in method has uniform force, good direction control, high production efficiency, and is mainly used for interference fit. Small-sized connectors with small interference fit can be pressed in with screw or lever-type press-in tools, and large interference fits can be pressed in with a press.

[0007] The basic principle of shrink fit is: by heating the containing part (hole) to expand its diameter to a certain value, and then freely insert the matching contained part (shaft) into the hole. After the hole cools down, the shaft is tightly held, and a great connection strength is generated, meeting the requirements of interference fit.

[0008] Cold fitting means that when the kit is too large and the part to be pressed in is too small, it is inconvenient or even impossible to heat the kit; or when some kits are not allowed to be heated, the part to be pressed in at low pressure can be cooled at low temperature to reduce its size, and then this part is quickly installed into the kit. This method is called cold fitting.

[0009] The rotor of the generator is installed on the generator shaft. The rotor coil and other components on the rotor are fixed in the stator of the generator through bearings. The protruding shaft part is used to install the shaft sleeve. It cannot be heated at high temperature, otherwise it will damage components such as the generator bearing and the coil on the generator shaft, as well as the coil on the generator. Similarly, cooling the entire generator will also damage the components of the generator; if the shaft sleeve of the generator coupling is forcibly knocked onto the generator shaft, it will cause the deformation of the generator shaft and damage components such as the bearing on the generator. The only feasible method is to heat the shaft sleeve of the generator set coupling. Heat the shaft sleeve of the generator set on the heater to make the shaft sleeve thermally expand, and increase the inner cavity diameter of the shaft sleeve to a certain value, that is, the inner diameter of the heated shaft sleeve should be larger than the outer diameter of the generator shaft. Then, accurately install this high-temperature and high-heat shaft sleeve at the specified shaft installation position of the generator. When the high-temperature and high-heat shaft sleeve gradually cools down, the shaft sleeve will tightly hold the generator shaft, generating a large connection strength during this period to meet the requirements of interference fit.

[0010] It is extremely difficult to accurately align the shaft cavity of the heavy, high-temperature and high-heat shaft sleeve with the generator shaft and align the keyway on the inner shaft cavity of the heavy, high-temperature and high-heat shaft sleeve with the key on the generator! Even if the shaft sleeve has been installed at the specified position on the generator shaft as required, and the rubber roller of the coupling is installed on the shaft sleeve of the generator, and the shaft sleeve and the rubber roller are connected and locked with high-elastic bolts and tightened according to the specified torque, it is not easy. Whether tightening or loosening the bolts clockwise or counterclockwise, the bolts lock the rubber roller and the shaft sleeve, the shaft sleeve holds the generator shaft, and the shaft is rotating. The high-temperature and high-heat shaft sleeve will dissipate heat and hurt the assembly workers, and the assembly efficiency is low. Summary of the Invention

[0011] The purpose of the present invention is to overcome the defects of the prior art and provide an installation method for the coupling of a diesel generator set, which can improve the assembly efficiency and ensure the safety of the assembly workers at the same time.

[0012] The technical solution to achieve the above purpose is: An installation method for the coupling of a diesel generator set, including the following steps:

[0013] S1. Steps for manufacturing a self-made lifting hook: The self-made lifting hook is bent from a steel bar. The upper end of the self-made lifting hook has a lifting ear, and the lower end has a hook needle. The length of the hook needle of the self-made lifting hook is three times the depth of the threaded hole of the bushing of the coupling, and the hook needle is inclined upward by 5°. The height of the self-made lifting hook is more than 10 times the distance between the threaded hole of the bushing of the coupling and the tangent of the outer circle of the bushing. A lifting rope is passed through the lifting ear of the self-made lifting hook, and the lifting rope is connected to the hanger crane.

[0014] S2. Steps for manufacturing a self-made handling tool: The self-made handling tool is welded by a steel column and a stainless steel bolt. The bolt head of the stainless steel bolt is welded to one end of the steel column. The stainless steel bolt is used to be screwed into the threaded hole of the bushing, and the screwing depth is the depth of the threaded hole of the bushing. The length of the steel column is 1.5 m.

[0015] S3. Steps for manufacturing a self-made clamping plate: The self-made clamping plate is welded by an angle iron and two 6-minute steel pipes. The specific processes include the following:

[0016] S31. Take an angle iron. The length of the angle iron is the outer diameter length of the transition sleeve of the generator plus 200 mm.

[0017] S32. Drill a perforation at each end of one surface of the angle iron. The distance between the two perforations is the diameter length of the circle formed by the centers of all the mounting holes on the transition sleeve of the generator. The size of the perforation is slightly larger than the size of the mounting hole on the transition sleeve of the generator.

[0018] S33. Cut two 6-minute steel pipes. The length of each steel pipe is 1.1 times the thickness of the rubber roller of the coupling.

[0019] S34. Then take the angle iron with perforations drilled in step S32, and weld the two 6-minute steel pipes to the plane of the angle iron with perforations respectively. The two 6-minute steel pipes are respectively located between the two perforations, and the two 6-minute steel pipes are symmetric with respect to the center of the angle iron. The distance between the two 6-minute steel pipes is the diameter of the circle formed by the centers of all the rolling grooves of the rubber roller of the coupling plus the diameter of a 6-minute steel pipe. The angle iron forms the clamping plate body, each 6-minute steel pipe forms a clamping column, and each perforation forms a clamping hole.

[0020] S4. Steps for manufacturing a self-made wrench: The self-made wrench is welded by a socket wrench head and two round steel bars. The specific processes include the following:

[0021] S41. Take a socket wrench head. The socket wrench head can just tightly fit the locking bolt between the rubber roller and the bushing of the coupling.

[0022] S42. Then take two round steel bars with a diameter of 20 mm and a length of 500 mm. One round steel bar is the wrench column, and the other round steel bar is the wrench handle.

[0023] S43, Weld one end of the wrench column to the back of the socket wrench head and the other end to the middle of the wrench handle, and smooth the rough edges and welding heads of the socket wrench head and the two round steel bars;

[0024] S5, Set the temperature value to be heated for the bush on the heater and move the heating crossbeam above the heater;

[0025] S6, Hook the hook needle of the self-made hook into a screw hole of the bush of the coupling;

[0026] S7, Move the self-made hook with the hooked bush through the hones and lifting ropes, align the bush with the heating crossbeam of the heater, pass the inner cavity of the bush through the heating crossbeam, and make the bush rest in the middle of the heating crossbeam. Then remove the self-made hook, and next place the temperature sensor of the heater closely against the bush and turn on the heater for heating;

[0027] S8, After the heater heats the bush to the set temperature and it remains constant, turn off the heater, remove the temperature sensor of the heater, take two self-made handling tools, and screw the stainless steel bolts on each self-made handling tool into a screw hole on the bush. The two self-made handling tools are respectively arranged on the radial two sides of the bush;

[0028] S9, Hook the hook needle of the self-made hook into a screw hole of the bush, and move the bush and the connected self-made handling tools through the hones, lifting ropes and the self-made hook to remove the bush from the heating crossbeam of the heater;

[0029] S10, Continue to move the bush and the connected self-made handling tools through the hones and the self-made hook to align the bush with the rotating shaft of the generator, and adjust the positions of the self-made hook and the self-made handling tools so that the heavy, high-temperature and high-heat bush is aligned with the rotating shaft of the generator, and the key groove on the inner cavity of the bush is aligned with the key on the rotating shaft of the generator;

[0030] S11, Remove the hook needle of the self-made hook from the screw hole of the bush, and use the two self-made handling tools to push the heavy, high-temperature and high-heat bush to the root of the rotating shaft of the generator and adjust the position;

[0031] S12, Unscrew the stainless steel bolts on the two self-made handling tools from the screw holes on the bush and wait for the bush to cool down;

[0032] S13, Use the hones to lift and move the rubber roller of the coupling to the generator with the installed bush, adjust the position and direction of the rubber roller so that the fixing plate in the middle of the rubber roller passes through the rotating shaft of the generator, and fit the fixing plate of the rubber roller to the bush. Adjust the position of the rubber roller so that the fixing holes on the fixing plate of the rubber roller are aligned with the screw holes on the bush, and insert the locking bolts with washers into each fixing hole and the corresponding screw hole. The locking bolts are used to fix the bush and the rubber roller of the coupling;

[0033] S14. Take the self-made card board, insert the two clamping posts of the self-made card board into the rolling grooves of the rubber rollers already installed on the generator respectively, and slowly push them in. Rotate the self-made card board so that the rubber rollers, the bushings and the rotating shaft of the generator rotate together. Align the two card holes on the self-made card board with the two mounting holes on the transition sleeve of the generator, and make the card board body of the self-made card board closely adhere to the end face of the transition sleeve of the generator. After passing the auxiliary bolts through the card holes of the self-made card board, tighten them in the mounting holes on the transition sleeve of the generator;

[0034] S15. Take the self-made wrench, put the socket wrench head of the self-made wrench on the locking bolts of the bushing and the rubber roller of the fixed coupling, and initially pre-tighten the locking bolts by rotating the wrench handle to rotate the socket wrench head. After all the locking bolts between the bushing and the rubber roller are initially pre-tightened, then use a high-strength torque wrench to tighten all the locking bolts and make corresponding tightening marks;

[0035] S16. Loosen the auxiliary bolts on the self-made card board, remove the self-made card board, and complete the installation of the coupling.

[0036] In the above-mentioned method for installing the coupling of a diesel generator set, when the hook needle of the self-made lifting hook is hooked in a screw hole of the bushing of the coupling, after the gravity of the bushing is transmitted to the self-made lifting hook, it is then transmitted to the overhead crane through the lifting rope. The self-made lifting hook is driven to move by the overhead crane and the lifting rope, thereby adjusting the position of the bushing.

[0037] In the above-mentioned method for installing the coupling of a diesel generator set, in step S11, the front and back positions of the bushing are adjusted by moving the steel column of the self-made handling tool back and forth, and at the same time, the up and down positions of the bushing are finely adjusted by moving the steel column of the self-made handling tool, so that the bushing of the coupling is accurately aligned with the rotating shaft of the generator, and at the same time, the keyway on the inner cavity of the bushing is accurately aligned with the key on the rotating shaft of the generator.

[0038] In the above-mentioned method for installing the coupling of a diesel generator set, the card board body of the self-made card board is locked on the end face of the transition sleeve of the generator by the auxiliary bolts in the two card holes and cannot rotate; the two clamping posts of the self-made card board are clamped in the rolling grooves of the rubber rollers of the coupling, so that the rubber rollers of the coupling cannot rotate; the locking bolts pass through the gaskets and the fixing holes on the fixing plate of the rubber roller in sequence and are then screwed into the screw holes on the bushing; when installing and disassembling the fastening bolts between the bushing and the rubber roller with the self-made wrench and the high-strength torque wrench, the rubber rollers, the bushing and the rotating shaft of the generator of the coupling will not rotate.

[0039] The method for installing the coupling of the diesel generator set of the present invention can improve the assembly efficiency and at the same time ensure the safety of the assembly personnel. Description of the Drawings

[0040] Figure 1 It is a structural schematic diagram of the self-made lifting hook;

[0041] Figure 2 It is a schematic structural diagram of a self-made handling tool;

[0042] Figure 3 It is a schematic structural diagram of a self-made pallet;

[0043] Figure 4 It is a schematic structural diagram of a self-made wrench;

[0044] Figure 5 It is a schematic structural diagram of the bushing of a coupling;

[0045] Figure 6 It is a schematic diagram of a lifting bushing;

[0046] Figure 7 It is a schematic structural diagram of the rubber roller of a coupling;

[0047] Figure 8 It is a schematic diagram of a heating bushing;

[0048] Figure 9 It is a schematic diagram of a picking-up bushing;

[0049] Figure 10 It is a schematic diagram of a generator;

[0050] Figure 11 It is a schematic diagram of a moving bushing;

[0051] Figure 12 It is a schematic diagram of bushing alignment;

[0052] Figure 13 It is a schematic diagram of pushing in a bushing;

[0053] Figure 14 It is a schematic diagram of a bushing in place;

[0054] Figure 15 It is a schematic diagram of rubber roller alignment;

[0055] Figure 16 It is a schematic diagram of a rubber roller in place;

[0056] Figure 17 It is a schematic diagram of lock bolt alignment;

[0057] Figure 18 It is a schematic diagram of a lock bolt in place;

[0058] Figure 19 It is a schematic diagram of self-made pallet alignment;

[0059] Figure 20 It is a schematic diagram of a self-made pallet in place;

[0060] Figure 21Schematic diagram of self-made card board locking;

[0061] Figure 22 Schematic diagram of pre-tightening of locking bolts;

[0062] Figure 23 Schematic diagram of locking of locking bolts. Specific implementation manners

[0063] In order to enable those skilled in the art of the present technology to better understand the technical solution of the present invention, the following will describe its specific implementation manners in detail with reference to the accompanying drawings:

[0064] Please refer to Figure 5 , the bushing 3 of the coupling. A plurality of screw holes 32 are provided on the bushing 3 along the same circumference; a keyway 34 is provided on the inner cavity 33 of the bushing 3.

[0065] Please refer to Figure 7 , a plurality of rolling grooves 22 are provided on the outer circumference of the rubber roller 2 of the coupling. A plurality of fixing holes 24 are provided on the fixing disk 23 in the middle of the rubber roller 2 along the same circumference. The plurality of fixing holes 24 and the plurality of screw holes 32 are arranged in one-to-one correspondence.

[0066] Please refer to Figure 10 , a plurality of mounting holes 13 are provided on the transition sleeve 12 of the generator 1 along the same circumference. A key 15 is provided on the rotating shaft 14 of the generator 1. When installing the coupling on the generator, the bushing 3 and the rubber roller 2 of the coupling are respectively installed on the rotating shaft 14 of the generator 1, and the bushing 3 and the rubber roller 2 are respectively located inside the transition sleeve 12. The bushing 3 and the rubber roller 2 are locked by a locking bolt 9 installed in the fixing hole 24 and the corresponding screw hole 32 (see Figure 17 ).

[0067] Please refer to Figures 1 to 23 , the best embodiment of the present invention, a method for installing a coupling of a diesel generator set, includes the following steps:

[0068] S1, the step of processing a self-made lifting hook: Please refer to Figure 1 , the self-made lifting hook 5 is bent from a steel bar. The upper end of the self-made lifting hook has a lifting ear 52, and the lower end has a hook needle 53; the length of the hook needle 53 of the self-made lifting hook 5 is three times the depth of the screw hole of the bushing of the coupling, and the hook needle 53 is inclined upward by 5°. The height of the self-made lifting hook 5 is more than 10 times the distance between the screw hole of the bushing of the coupling and the tangent of the outer circle of the bushing, which is convenient for lifting operations. A lifting rope 51 is passed through the lifting ear 52 of the self-made lifting hook 5, and the lifting rope is connected to the hoist;

[0069] S2, the step of processing a self-made handling tool: Please refer to Figure 2, The self-made handling tool 7 is welded by a steel column 72 and stainless steel bolts 71. The bolt head of the stainless steel bolt 71 is welded to one end of the steel column 72. The stainless steel bolt 71 is used to screw into the screw hole of the bushing, and the screwing depth is the depth of the screw hole of the bushing. The length of the steel column 72 is about 1.5 m, which is convenient for using the self-made handling tool to move the bushing. During the processing, attention should be paid to the welding strength between the bolt head of the stainless steel bolt 71 and the steel column 72;

[0070] S3. Steps for processing the self-made clamping plate: Please refer to Figure 3 , The self-made clamping plate 6 is welded by angle iron and two sections of 6-minute steel pipes. The specific processes include the following:

[0071] S31. Take the angle iron. The length of the angle iron is the outer diameter length of the transition sleeve of the generator plus 200 mm;

[0072] S32. Drill a perforation at each end of one surface of the angle iron. The distance between the two perforations is the diameter length of the circle formed by the centers of all the mounting holes on the transition sleeve of the generator. The size of the perforation is slightly larger than the size of the mounting holes on the transition sleeve of the generator;

[0073] S33. Cut two sections of 6-minute steel pipes. The length of each section of the steel pipe is 1.1 times the thickness of the rubber roller of the coupling;

[0074] S34. Then take the angle iron with perforations drilled in step S32, and weld the two sections of 6-minute steel pipes to the plane of the angle iron with perforations respectively. The two sections of 6-minute steel pipes are respectively located between the two perforations, and the two sections of 6-minute steel pipes are symmetric with respect to the center of the angle iron. The distance between the two sections of 6-minute steel pipes is the diameter of the circle formed by the centers of all the rolling grooves of the rubber roller of the coupling plus the diameter of one 6-minute steel pipe; The angle iron forms the clamping plate body 61, each section of 6-minute steel pipe forms a clamping column 63, and each perforation forms a clamping hole 62; During the processing, the welding strength needs to be ensured;

[0075] S4. Steps for processing the self-made wrench: Please refer to Figure 4 , The self-made wrench 8 is welded by a socket head 81 and two round steel bars. The specific processes include the following:

[0076] S41. Take a socket head 81. The socket head 81 can just tightly fit the locking bolt between the rubber roller and the bushing of the coupling;

[0077] S42. Then take two round steel bars with a diameter of 20 mm and a length of 500 mm. One round steel bar is the wrench column 82, and the other round steel bar is the wrench handle 83;

[0078] S43. Weld one end of the wrench column 82 to the back of the socket head 81, and weld the other end to the middle of the wrench handle 83, and polish the burrs and welding heads of the socket head 81 and the two round steel bars smoothly;

[0079] S5, refer to Figure 8 , set the temperature value to be heated for the bushing on the heater 4, and move the heating crossbeam 42 above the heater;

[0080] S6, refer to Figure 5 and Figure 6 , use the crochet needle 53 of the self-made hook 5 to hook into a screw hole 32 of the bushing 3 of the coupling;

[0081] S7, refer to Figure 8 again, move the self-made hook 5 with the hooked bushing through the honing machine and the lifting rope, align the bushing 3 with the heating crossbeam 42 of the heater 4, and make the inner cavity 33 of the bushing 3 pass through the heating crossbeam 42, and the bushing 3 stop in the middle of the heating crossbeam 42. Then remove the self-made hook, and then place the temperature sensor of the heater closely against the bushing and turn on the heater for heating;

[0082] S8, refer to Figure 9 , after the heater heats the bushing to the set temperature and keeps it constant, turn off the heater, remove the temperature sensor of the heater, take two self-made handling tools 7, and screw the stainless steel bolts 71 on each self-made handling tool 7 into a screw hole 32 on the bushing 3. The two self-made handling tools 7 are arranged on both radial sides of the bushing;

[0083] S9, refer to Figure 9 , hook the crochet needle 53 of the self-made hook 5 into a screw hole 32 of the bushing 3, and carry the bushing 3 and the connected self-made handling tool 7 through the honing machine, the lifting rope and the self-made hook, so that the bushing 3 is removed from the heating crossbeam 42 of the heater 4;

[0084] S10, refer to Figure 10 , Figure 11 and Figure 12 , continue to carry the bushing 3 and the connected self-made handling tool 7 through the honing machine and the self-made hook, align the bushing 3 with the rotating shaft 14 of the generator 1, and adjust the positions of the self-made hook 5 and the self-made handling tool 7 so that the heavy, high-temperature and high-heat bushing 3 is aligned with the rotating shaft 14 of the generator 1, and the keyway 34 on the inner cavity of the bushing 3 is aligned with the key 15 on the rotating shaft 14 of the generator 1;

[0085] S11, refer to Figure 13 , remove the crochet needle 53 of the self-made hook 5 from the screw hole 32 of the bushing 3, remove the self-made hook 5, and use the two self-made handling tools 7 to push the heavy, high-temperature and high-heat bushing 3 to the root of the rotating shaft 14 of the generator 1 and adjust the position;

[0086] S12, refer to Figure 14 , screw out the stainless steel bolts on the two self-made handling tools 7 from the screw holes 32 on the bushing 3 and wait for the bushing 3 to cool down;

[0087] S13, refer to Figure 15 、 Figure 16 、 Figure 17 and Figure 18 , use the honing machine to hoist and move the rubber roller 2 of the coupling to the generator where the bushing is already installed. Adjust the position and direction of the rubber roller 2 so that the fixing plate 23 in the middle of the rubber roller 2 passes through the rotating shaft 14 of the generator 1, and make the fixing plate 23 of the rubber roller 2 fit with the bushing 3. Adjust the position of the rubber roller 2 so that the fixing holes 24 on the fixing plate 23 of the rubber roller 2 are aligned with the screw holes 32 on the bushing 3, and insert the locking bolts 9 with washers into each fixing hole 24 and the corresponding screw hole 32. The locking bolts 9 are used to fix the bushing 3 and the rubber roller 2 of the coupling;

[0088] S14, refer to Figure 19 、 Figure 20 and Figure 21 , take the self-made clamping plate 6, insert the two clamping posts 63 of the self-made clamping plate 6 into the rolling grooves 22 of the rubber roller 2 already installed on the generator 1 respectively, and slowly push them in. Rotate the self-made clamping plate 6 so that the rubber roller 2, the bushing 3 and the rotating shaft 14 of the generator 1 rotate together. Align the two clamping holes 62 on the self-made clamping plate 6 with the two mounting holes 13 on the adapter sleeve 12 of the generator 1, and make the clamping plate body 61 of the self-made clamping plate 6 closely adhere to the end face of the adapter sleeve 12 of the generator 1. After passing the auxiliary bolt 100 through the clamping hole 62 of the self-made clamping plate 6, tighten it in the mounting hole 13 on the adapter sleeve 12 of the generator 1;

[0089] S15, refer to Figure 22 , take the self-made wrench 8, and put the socket head 81 of the self-made wrench 8 on the locking bolt 9 that fixes the bushing 3 and the rubber roller 2 of the coupling. Rotate the socket head 81 by rotating the wrench handle 83 to perform the preliminary pre-tightening of the locking bolt. After all the locking bolts 9 between the bushing 3 and the rubber roller 2 are pre-tightened, then use a high-strength torque wrench to tighten all the locking bolts and make corresponding tightening marks;

[0090] S16, refer to Figure 23 , loosen the auxiliary bolt 100 on the self-made clamping plate 6, remove the self-made clamping plate 6, and complete the installation of the coupling.

[0091] For the method of installing the coupling of the diesel generator set of the present invention, the hook needle 53 of the self-made hook 5 is hooked in a screw hole 32 of the bushing 3 of the coupling, and the lifting lug 52 of the self-made hook 5 is put on the lifting rope 51 and connected to the honing machine; after the gravity of the bushing 3 is transmitted to the self-made hook 5, it is then transmitted to the honing machine through the lifting rope 51. The self-made hook is driven to move by the honing machine and the lifting rope, thereby adjusting the position of the bushing 3. The honing machine can move left and right and can also move up and down, and can adjust the upper, lower, left and right positions of the bushing of the generator set coupling, and thus can arbitrarily adjust the position of the bushing to correspond to the position of the rotating shaft 14 of the generator 1.

[0092] In steps S5 - S10, after the bushing 3 is heated and warmed up by the heater 4, it is hot and heavy. If it is carried manually by hand, it will surely hurt the assembly workers when installing the bushing of the generator set coupling. Wearing gloves for assembly work cannot avoid the burns of the assembly workers. The advantages of using the self - made hook 5 for handling are naturally revealed. The self - made hook 5 hooks the bushing of the generator set coupling, effectively avoiding the contact between the assembly workers and the hot and heavy bushing of the generator set coupling, thus avoiding the harm of the heat emitted by the hot and heavy bushing of the generator set coupling to the assembly workers, and further protecting the safety of the assembly workers.

[0093] In the method for installing the coupling of the diesel generator set of the present invention, in step S11, the front - rear position of the bushing is adjusted by moving the steel column of the self - made handling tool 7 back and forth. At the same time, the up - down position of the bushing 3 is finely adjusted by moving the steel column of the self - made handling tool 7, so that the bushing 3 of the coupling is accurately aligned with the rotating shaft 14 of the generator, and at the same time, the keyway 34 on the inner cavity 33 of the bushing 3 is accurately aligned with the key 15 on the rotating shaft 14 of the generator 1.

[0094] The self - made handling tool 7 is formed by welding a steel column 72 and a stainless - steel bolt 71.

[0095] Please refer to Figure 9 、 Figure 11 、 Figure 12 and Figure 13 , the stainless - steel bolt 71 of the self - made handling tool 7 can be screwed into the screw hole on the bushing of the generator set coupling. The steel column 72 of the self - made handling tool 7 can move the position of the bushing of the generator set coupling back and forth, and can also finely adjust the up - down position of the bushing of the generator set coupling, so as to accurately adjust the alignment of the bushing of the generator set coupling with the generator shaft. At the same time, it can also finely adjust the alignment of the keyway on the inner cavity of the bushing of the generator set coupling with the key on the generator shaft. Through the steel column 72, the bushing of the generator coupling can also be pushed to the root of the rotating shaft of the generator, that is, the position specified by the technical design for the bushing of the generator set coupling on the generator shaft.

[0096] Installation method of the coupling of the diesel generator set of the present invention. The card body of the self-made card plate 6 is locked on the end face of the transition sleeve 12 of the generator 1 through the auxiliary bolts 100 in the two card holes 62 and cannot be rotated randomly; the two card columns 62 of the self-made card plate 6 are clamped in the rolling grooves 22 of the rubber roller 2 of the coupling, so that the rubber roller of the coupling cannot be rotated either; the high-strength locking bolt 9 passes through the high-strength gasket and the fixing hole 24 on the fixing disk 23 of the rubber roller 2 in sequence and is then screwed into the threaded hole 32 on the shaft sleeve 3; when installing and disassembling the fastening bolt 9 between the shaft sleeve 3 and the rubber roller 2 with the self-made wrench and the high-strength torque wrench, the rubber roller of the coupling, the shaft sleeve and the rotating shaft of the generator will not rotate. Whether using the self-made wrench 8 and the high-strength torque wrench to install and disassemble the high-strength locking bolt 9 between the shaft sleeve and the rubber roller on the coupling of the generator set, no matter applying force in the clockwise or counterclockwise direction on the force-applying rod of the wrench, the rubber roller of the coupling installed on the generator, the shaft sleeve and the rotating shaft of the generator will not rotate (see Figure 19 , Figure 20 , Figure 21 , Figure 22 and Figure 23 ).

[0097] Installation method of the coupling of the diesel generator set of the present invention. The socket head 81 of the self-made wrench 8 can extend into the fixing disk 23 in the middle of the rubber roller 2 equipped with the coupling of the generator set, and at the same time can be sleeved on the high-strength locking bolt 9 on the fixing disk 23; the torque can be led out through the wrench column 82 of the self-made wrench 8; by turning the wrench handle 83 of the self-made wrench 8, it is very convenient to tighten the locking bolt 9 between the rubber roller 2 and the shaft sleeve 3 fastened to the coupling of the generator set.

[0098] The installation method of the coupling of the diesel generator set of the present invention mainly involves using a self-made hook 5 to hook the screw hole of the shaft sleeve of the generator coupling, moving it to a heater with a preset heating temperature, heating the shaft sleeve of the coupling. After the temperature on the shaft sleeve rises to the specified temperature value and stabilizes, use a self-made handling tool 7 to screw into the screw hole of the shaft sleeve of the coupling. While hooking and moving the shaft sleeve of the generator coupling, by adjusting the up, down, left, and right positions of the self-made hook 5 and the self-made handling tool 7, the heavy, high-temperature and high-heat shaft sleeve 3 of the generator coupling is aligned with the rotating shaft 14 of the generator, and the keyway 34 on the inner cavity 33 of the shaft sleeve 3 of the generator coupling is aligned with the key 15 on the rotating shaft 14 of the generator. Remove the self-made hook 5, use the self-made handling tool 7 to push the heavy, high-temperature and high-heat shaft sleeve 3 to the root of the rotating shaft 14 of the generator and adjust it (that is, the position where the shaft sleeve is installed in the technical requirements). Unscrew the self-made handling tool 7. After the shaft sleeve cools down, move the rubber roller 2 of the generator set coupling to the rotating shaft 14 of the generator, and lock it with a highly elastic locking bolt 9 between the rubber roller 2 and the shaft sleeve 3. Use a self-made clamping plate 6 to clamp the rubber roller 2 installed on the generator shaft sleeve. Pass an auxiliary bolt 100 through the clamping hole 62 on the self-made clamping plate and lock it in the installation hole 13 of the transition sleeve 12 of the generator. Use a self-made wrench 8 to lock the locking bolt 9 on the rubber roller 2 and the shaft sleeve 3.

[0099] In summary, the installation method of the coupling of the diesel generator set of the present invention can improve the assembly efficiency and at the same time ensure the safety of the assembly personnel.

[0100] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention and are not used to limit the present invention. As long as it is within the scope of the essential spirit of the present invention, changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A method for installing a coupling of a diesel generator set, characterized in that, it includes the following steps: S1, fabricate a self-made lifting hook, which is bent from steel bars. The upper end of the self-made lifting hook has a lifting ear, and the lower end has a hook needle; S2, fabricate a self-made handling tool, which is welded by a steel column and stainless steel bolts; S3, fabricate a self-made clamping plate, which is welded by angle iron and two 6-minute steel pipes. Drill a perforation at each end of one surface of the angle iron, and weld the two 6-minute steel pipes on the plane of the angle iron with perforations respectively. The two 6-minute steel pipes are respectively located between the two perforations. The angle iron forms the clamping plate body, each 6-minute steel pipe forms a clamping column, and each perforation forms a clamping hole; S4, fabricate a self-made wrench, which is welded by a socket wrench head and two round steel bars. One round steel bar is the wrench column, and the other round steel bar is the wrench handle; S5, set the temperature value to be heated for the bushing on the heater, and move the heating cross beam above the heater; S6, hook the hook needle of the self-made lifting hook into a screw hole of the bushing of the coupling; S7, move the self-made lifting hook with the hooked bushing through the honing machine and the lifting rope, so that the bushing is aligned with the heating cross beam of the heater, and the inner cavity of the bushing passes through the heating cross beam, and the bushing stops in the middle of the heating cross beam. Then remove the self-made lifting hook, and then place the temperature sensor of the heater closely against the bushing, and turn on the heater to heat; S8, after the heater heats the bushing to the set temperature and keeps it constant, turn off the heater, remove the temperature sensor of the heater, take two self-made handling tools, and screw the stainless steel bolts on each self-made handling tool into a screw hole on the bushing. The two self-made handling tools are respectively arranged on the radial two sides of the bushing; S9, hook the hook needle of the self-made lifting hook into a screw hole of the bushing, and transport the bushing and the connected self-made handling tool through the honing machine, the lifting rope and the self-made lifting hook, so that the bushing is removed from the heating cross beam of the heater; S10, continue to transport the bushing and the connected self-made handling tool through the honing machine and the self-made lifting hook, so that the bushing is aligned with the rotating shaft of the generator, and adjust the positions of the self-made lifting hook and the self-made handling tool, so that the heavy, high-temperature and high-heat bushing is aligned with the rotating shaft of the generator, and the key groove on the inner cavity of the bushing is aligned with the key on the rotating shaft of the generator; S11, remove the hook needle of the self-made lifting hook from the screw hole of the bushing, and use the two self-made handling tools to push the heavy, high-temperature and high-heat bushing to the root of the rotating shaft of the generator and adjust the position; S12, screw out the stainless steel bolts on the two self-made handling tools from the screw holes on the bushing, and wait for the bushing to cool; S13, use the honing machine to lift and move the rubber roller of the coupling to the generator where the bushing is already installed, adjust the position and direction of the rubber roller, so that the fixing plate in the middle of the rubber roller passes through the rotating shaft of the generator, and fit the fixing plate of the rubber roller with the bushing. Adjust the position of the rubber roller, so that the fixing holes on the fixing plate of the rubber roller are aligned with the screw holes on the bushing, and insert locking bolts with gaskets into each fixing hole and the corresponding screw hole. The locking bolts are used to fix the bushing and the rubber roller of the coupling; S14. Take the self-made card board, insert the two card columns of the self-made card board into the rolling grooves of the rubber rollers already installed on the generator respectively, and slowly push them in. Rotate the self-made card board to make the rubber roller, the bushing and the rotating shaft of the generator rotate together. Align the two card holes on the self-made card board with the two mounting holes on the transition sleeve of the generator, and make the card board body of the self-made card board closely adhere to the end face of the transition sleeve of the generator. After passing the auxiliary bolts through the card holes of the self-made card board, tighten them in the mounting holes on the transition sleeve of the generator. S15. Take the self-made wrench, put the socket head of the self-made wrench on the locking bolts of the bushing of the fixed coupling and the rubber roller, and initially pre-tighten the locking bolts by rotating the wrench handle to rotate the socket head. After all the locking bolts between the bushing and the rubber roller are pre-tightened, then use a high-strength torque wrench to tighten all the locking bolts and make corresponding tightening marks. S16. Loosen the auxiliary bolts on the self-made card board, remove the self-made card board, and complete the installation of the coupling.

2. A method for installing a coupling of a diesel generator set according to claim 1, wherein, when the hook needle of the self-made hook is hooked in a screw hole of the bushing of the coupling, after the gravity of the bushing is transmitted to the self-made hook, it is then transmitted to the overhead crane through the lifting rope, and the self-made hook is driven to move by the overhead crane and the lifting rope, thereby adjusting the position of the bushing.

3. A method for installing a coupling of a diesel generator set according to claim 1, wherein, in step S11, the front and rear positions of the bushing are adjusted by moving the steel column of the self-made handling tool back and forth, and at the same time, the up and down positions of the bushing are finely adjusted by moving the steel column of the self-made handling tool, so that the bushing of the coupling is accurately aligned with the rotating shaft of the generator, and at the same time, the keyway on the inner cavity of the bushing is accurately aligned with the key on the rotating shaft of the generator.

4. A method for installing a coupling of a diesel generator set according to claim 1, wherein, the card board body of the self-made card board is locked on the end face of the transition sleeve of the generator by the auxiliary bolts in the two card holes and cannot rotate; the two card columns of the self-made card board are clamped in the rolling grooves of the rubber rollers of the coupling, so that the rubber rollers of the coupling cannot rotate; the locking bolts pass through the gaskets and the fixing holes on the fixing plate of the rubber roller in sequence and are then screwed into the screw holes on the bushing; when installing and disassembling the fastening bolts between the bushing and the rubber roller with the self-made wrench and the high-strength torque wrench, the rubber rollers, the bushing and the rotating shaft of the generator of the coupling will not rotate.

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