A high-power diesel generator set power transmission coupling device

Abstract

The application discloses a power transmission coupling device of a high-power diesel generator set, which comprises a moving and carrying trolley, a first axial pushing mechanism arranged on the moving and carrying trolley and located below a motor rotor, a lifting part capable of lifting and a bearing contact part rotatably arranged on the top of the lifting part, a plurality of ball bearings are arranged on the bearing contact part, the bearing contact part is used for bearing the motor rotor in a drooping state and allowing the motor rotor to rotate and reset to axial flatness, and an axial butt joint moving and carrying mechanism arranged on the moving and carrying trolley, the axial butt joint moving and carrying mechanism comprises a butt joint shaft capable of horizontally moving and rotating, and a convex block is arranged on the butt joint shaft. The device solves the problem that the axial flatness of the motor rotor is maintained during the installation process of the motor shell, the uniform gap between the inner wall of the motor shell and the outer circular surface of the motor rotor is maintained, the large-area contact and sliding jam caused by the drooping of the rotor are avoided, the anti-corrosion coating or the insulating layer on the outer surface of the motor rotor is prevented from being scratched and peeled off, and the insulating reliability and the internal cleanliness of the generator are ensured.

Description

Technical Field

[0001] This invention relates to the field of generator technology, and more specifically, to a power transmission connection device for a high-power diesel generator set. Background Technology

[0002] A diesel generator set is a power device that converts the mechanical energy of a diesel engine into electrical energy. It is widely used in engineering construction, emergency power supply, and power supply security in remote areas.

[0003] Currently, the power transmission connection device for high-power diesel generator sets on the market includes a diesel engine, output disc, motor rotor, motor housing, motor cover, and fasteners for axial fixation of each component. The motor rotor is installed after the output disc, and the motor housing and motor cover are slidably fitted onto the outside of the motor rotor along the axial direction. All components are connected and power is transmitted via bolts. While this assembly method enables power transmission between the diesel engine and generator and the assembly of the overall structure, it still has significant shortcomings in actual installation: due to its large length, the motor rotor is prone to axial sagging under its own weight after installation. When assembling the motor housing, a lifting tool is needed to lift the front end of the rotor shaft to correct the sagging. At this time, a large area of ​​tight contact is formed between the inner wall of the housing and the outer surface of the rotor shaft in a localized area. During the axial pushing of the housing, dry friction or boundary friction occurs in the contact area, causing a sharp increase in sliding resistance and resulting in jamming. If forced pushing is attempted, the anti-corrosion coating or insulation layer on the outer surface of the rotor shaft is easily damaged. Scratches and peelings can cause debris to accumulate inside the casing, affecting the reliability of the generator's insulation. Furthermore, after the casing is installed, a gap remains between its inner bore and the rotor shaft, failing to provide effective support. The drooping and offset of the rotor shaft's front end is not corrected, leading to the need for repeated adjustments and tightening of the fasteners during subsequent motor cover installation. This process is cumbersome and inefficient. If the fasteners are forcibly tightened due to misalignment, the casing mounting flange cannot withstand the bolt's tensile stress, resulting in localized plastic deformation. Tightening the fasteners under inclined stress can also cause uneven thread wear, seizing, or stripping. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a power transmission connection device for a high-power diesel generator set with a first axial push-up mechanism and an axial docking and transfer mechanism.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The invention is further configured as follows: a transfer trolley, a first axial push-alignment mechanism, disposed on the transfer trolley and located below the motor rotor, including a liftable rising part and a bearing contact part rotatably mounted on the top of the rising part via a rotating shaft, the bearing contact part being provided with multiple ball bearings for bearing the drooping motor rotor and allowing it to rotate back to axial straightness; an axial docking transfer mechanism, disposed on the transfer trolley, including a horizontally movable and rotatable docking shaft, the docking shaft being provided with a protrusion; before assembling the motor housing and motor cover, the docking shaft moves horizontally to make the protrusion engage with the opening at the end of the motor rotor, and then rotates to make the protrusion face downwards, thereby forming axial limiting and radial support for the motor rotor after the bearing contact part descends, cooperating with the first axial push-alignment mechanism to maintain the axial straightness of the motor rotor.

[0006] By adopting the above technical solution, large-area contact and sliding jamming caused by rotor sagging are avoided, and the anti-corrosion coating or insulation layer on the outer surface of the motor rotor is prevented from being scratched or peeled off, thus ensuring the insulation reliability and internal cleanliness of the generator.

[0007] The invention is further configured such that: the top surface of the bearing contact part and the contact surface of the motor rotor are semi-circular structures; when the rising part rises to make the bearing contact part contact the motor rotor, the bearing contact part can rotate and tilt relative to the rising part through the rotating shaft, so that the opening of the semi-circular structure is adapted to the downward direction of the motor rotor; the ball bearing maintains rolling contact with the outside of the motor rotor, so that the motor rotor can be synchronously rotated and adjusted to an axially straight state during the bearing reset process.

[0008] The invention is further configured such that: the first axial thrust mechanism also includes a multi-stage telescopic cylinder, which is installed on the transfer trolley and located below the motor rotor. The multi-stage telescopic cylinder is located away from the axial docking transfer mechanism, and its output end is connected to the lifting part for driving the lifting part to move up and down.

[0009] The invention is further configured such that: the first axial pushing mechanism also includes a sliding part; the sliding part is slidably installed in the openings on both sides of the transfer trolley, and the bottom of the sliding part is provided with ball bearings that roll with the openings; the sliding part is used to support the motor housing to be assembled.

[0010] The present invention is further configured such that: the axial docking and transfer mechanism also includes a positioning frame; the positioning frame is mounted on the transfer trolley and located beside the first axial push-alignment mechanism, and the docking shaft and the positioning frame are in clearance fit; in the docking state, the motor housing is supported on the sliding part and close to the positioning frame, the docking shaft passes through the motor housing and extends to the end of the motor rotor, and is engaged with the opening at the end of the motor rotor and rotated until the protrusion faces downward, so as to support the motor rotor.

[0011] The present invention is further configured such that: the axial docking and transfer mechanism further includes a pushing part and an abutting part; the pushing part is slidably disposed on the positioning frame and located above the docking shaft, and the pushing part is clearance-fitted with the docking shaft; the abutting part is fixed on the side of the pushing part facing the motor rotor, and the abutting part is used to abut against the side of the motor housing or motor cover when the pushing part slides axially along the docking shaft, so as to push the motor housing or motor cover along the docking shaft to the outside of the motor rotor.

[0012] The invention is further configured such that: the bearing contact portion has an upward support state, and the docking shaft, the pushing portion, and the abutting portion have a moving away state relative to the motor rotor along the positioning frame; when the bearing contact portion is in the upward support state to support the outside of the motor rotor and keep it flat, the docking shaft, the pushing portion, and the abutting portion can move along the positioning frame in a direction away from the motor rotor, so that an assembly space for inserting the power supply cover is formed between the end of the docking shaft and the end of the motor rotor shaft.

[0013] The invention is further configured such that the motor cover can be fitted onto the outside of the docking shaft, and its end face forms an abutment positioning with the abutment portion.

[0014] The invention is further configured such that: the docking shaft can move back towards the motor rotor from the moving away state, so that the protrusion on the docking shaft can be inserted into the opening at the end of the motor rotor to form a support; the bearing contact part can descend from the rising support state; the pushing part and the abutting part can slide along the docking shaft to push the motor cover from the docking shaft to the side of the motor housing, thereby completing the docking of the motor cover and the motor housing.

[0015] The present invention is further configured such that: the abutting part includes two transverse rods and two semi-circular blocks, the two transverse rods are respectively fixed to both sides of the pushing part, the two semi-circular blocks are respectively fixed to the ends of the corresponding transverse rods, and the openings of the two semi-circular blocks are respectively adapted to the outer contours of the motor housing and the motor cover, for forming an abutment with the motor housing and the motor cover.

[0016] By adopting the above technical solution, the problems of local plastic deformation of the motor housing mounting flange and seizing of fastener threads caused by repeated hoisting, adjustment and forced correction in the prior art are avoided.

[0017] In summary, this application includes at least one of the following beneficial technical effects: By setting up the first axial thrust mechanism and the axial docking transfer mechanism, the axial straightness of the motor rotor is maintained during the installation of the motor housing, so that the inner wall of the motor housing and the outer circular surface of the motor rotor are kept in a uniform gap. This avoids large-area contact and sliding jamming caused by rotor sagging, and prevents the anti-corrosion coating or insulation layer on the outer surface of the motor rotor from being scratched or peeled off, thus ensuring the insulation reliability and internal cleanliness of the generator.

[0018] By setting up an axial docking and transfer mechanism, stable radial support for the motor rotor is maintained throughout the entire motor cover installation process, preventing the rotor from sagging or shifting due to its own weight. Simultaneously, the docking shaft serves not only as a temporary support but also as a sliding guide for the motor cover, ensuring that the rotor's straightness is maintained without affecting the axial insertion and movement of the motor cover. This alternating support-yield-re-support mechanism ensures automatic alignment between the motor cover and the motor housing, thus avoiding the problems of localized plastic deformation of the motor housing mounting flange and seizing of fastener threads caused by repeated hoisting adjustments and forced corrections in existing technologies. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a high-power diesel generator set power transmission connection device according to the present invention; Figure 2 This is a side view of the structure of the present invention in its fully installed state; Figure 3 This is a three-dimensional structural view of the output disk, motor rotor, motor housing, and motor cover of the present invention in a disassembled state. Figure 4 This is a side view of the motor rotor shaft of the present invention in a state of downward offset and lifting of the bearing contact part; Figure 5 This is a top view of the structure of the motor rotor shaft of the present invention in a state of downward offset and lifting of the bearing contact part; Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a front view of the bearing contact part, the rising part, and the multi-stage telescopic cylinder of the present invention. Figure 8 The above-ground structural diagrams of the rising part and the bearing contact part of the present invention in states C, D and E are shown. Figure 9 This is a three-dimensional structural view of the motor housing of the present invention, placed on the sliding part and aligned with the motor rotor; Figure 10 for Figure 9 Enlarged structural diagram at point B; Figure 11 This is a perspective view of the installation state of the mating shaft and the motor rotor of the present invention, showing the connection and contact portion pushing the motor housing and the motor rotor together. Figure 12 This is a three-dimensional structural view of the motor cover of the present invention installed in the motor housing.

[0020] Explanation of reference numerals in the attached drawings: 1. Transfer trolley; 2. First axial push-alignment mechanism; 21. Lifting part; 22. Bearing contact part; 23. Ball bearing; 24. Multi-stage telescopic cylinder; 25. Sliding part; 3. Axial docking transfer mechanism; 31. Docking shaft; 32. Protrusion block; 33. Positioning frame; 34. Pushing part; 35. Abutting part; 351. Transverse rod; 352. Semi-circular block. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] Please see Figure 1 - Figure 12 The present invention provides the following technical solutions: Example 1: To address the issue in existing technologies where, during the power transmission connection of a diesel generator set, the motor rotor, due to its considerable length, is prone to axial sagging after installation onto the diesel engine's output disc, the following measures are taken: When assembling the motor housing, operators first place the housing over the outside of the motor rotor. To correct this sagging, a lifting device is used to hoist the front end of the rotor, resulting in large-area tight contact between the inner wall of the housing and the outer surface of the rotor in localized areas. During the axial sliding of the housing to the installation position, dry friction or boundary friction occurs in this contact area, drastically increasing sliding resistance and causing jamming and installation difficulties. If forced, the anti-corrosion coating or insulation layer on the outer surface of the motor rotor is easily scratched and peeled off by the inner wall of the housing, exposing the metal substrate and causing scratches. Simultaneously, the detached coating debris may accumulate inside the housing, affecting the generator's insulation reliability and internal cleanliness.

[0024] This embodiment includes a transfer trolley 1, a first axial alignment mechanism 2 mounted on the transfer trolley 1 and located below the motor rotor, including a liftable rising part 21 and a bearing contact part 22 rotatably mounted on the top of the rising part 21 via a rotating shaft. The bearing contact part 22 is provided with multiple ball bearings 23 for bearing the drooping motor rotor and allowing it to rotate back to axial straightness; an axial docking transfer mechanism 3, mounted on the transfer trolley 1, includes a horizontally movable and rotatable docking shaft 31, with a protrusion 32 on the docking shaft 31; before assembling the motor housing and motor cover, the docking shaft 31 moves horizontally to make the protrusion 32 engage in the opening at the end of the motor rotor, and then rotates to make the protrusion 32 face downward, thereby forming axial limiting and radial support for the motor rotor after the bearing contact part 22 descends, cooperating with the first axial alignment mechanism 2 to maintain the axial straightness of the motor rotor.

[0025] Specifically, before installing the motor housing and motor cover, the rising part 21 of the first axial thrust mechanism 2 rises, causing multiple ball bearings 23 on the bearing contact part 22 to roll into contact with the drooping motor rotor. Under its own weight and the support of the ball bearings, the motor rotor can rotate back to axial alignment. The docking shaft 31 of the axial docking and transfer mechanism 3 first moves horizontally, causing its protrusion 32 to engage with the opening at the end of the motor rotor, and then rotates so that the protrusion 32 faces downward. Subsequently, the bearing contact part 22 descends, and the weight of the motor rotor is transferred to the docking shaft 31, which provides axial limit and radial support for the motor rotor. Through the alternating cooperation of the first axial thrust mechanism 2 and the axial docking and transfer mechanism 3, the axial alignment of the motor rotor is maintained throughout the assembly process, thus eliminating the need for lifting tools and avoiding sliding jamming and surface scratches caused by lifting the motor rotor.

[0026] See Figure 4 - Figure 8 The top surface of the bearing contact 22 and the contact surface of the motor rotor are semi-circular structures. When the rising part 21 rises to make the bearing contact 22 contact the motor rotor, the bearing contact 22 can rotate and tilt relative to the rising part 21 through the rotating shaft, so that the opening of the semi-circular structure is adapted to the downward direction of the motor rotor. The ball bearing 23 maintains rolling contact with the outside of the motor rotor, so that the motor rotor can be synchronously rotated and adjusted to an axially straight state during the bearing reset process.

[0027] See Figure 8 In this embodiment, state C is when the bearing contact portion 22 and the rising portion 21 are not in contact with the motor rotor. In this state, the bearing contact portion 22 is in inclined contact with the top end face of the rising portion 21 via the rotating shaft. State D is when the rising portion 21 gradually rises, and the bearing contact portion 22 rotates around the rotating shaft to an inclined state in contact with the motor rotor. State E is when the rising portion 21 rises and drives the bearing contact portion 22 to rotate around the rotating shaft to a state in which it makes direct axial contact with the motor rotor.

[0028] When the rising part 21 moves upward and the bearing contact part 22 contacts the drooping motor rotor, the semi-circular bearing contact part 22 can automatically rotate and tilt relative to the rising part 21 along with the downward direction of the motor rotor, so that its opening faces the skew angle adapted to the motor rotor, ensuring that all the ball bearings 23 can form rolling contact with the surface of the motor rotor. During the reset rotation of the motor rotor, the ball bearings 23 can roll and rub, avoiding damage to the anti-corrosion coating or insulation layer on the surface of the motor rotor caused by sliding friction, so that the motor rotor can smoothly return to an axially straight state.

[0029] See Figure 4 The first axial thrust mechanism 2 also includes a multi-stage telescopic cylinder 24, which is mounted on the transfer trolley 1 and located below the motor rotor. The multi-stage telescopic cylinder 24 is set away from the axial docking transfer mechanism 3, and its output end is connected to the lifting part 21 to drive the lifting part 21 to rise and fall.

[0030] When the multi-stage telescopic cylinder 24 is started, it can drive the bearing contact part 22 to rise to contact the motor rotor, or to fall to disengage from the motor rotor, so as to realize timely support and disengagement of the motor rotor.

[0031] See Figure 9 The first axial pushing mechanism 2 also includes a sliding part 25; the sliding part 25 is slidably installed in the openings on both sides of the transfer trolley 1, and the bottom of the sliding part 25 is provided with ball bearings that roll with the openings. The sliding part 25 is used to support the motor housing to be assembled.

[0032] The sliding part 25 rolls within the openings on both sides of the transfer trolley 1 via its bottom ball bearings, allowing it to slide back and forth along the trolley 1. During assembly, the motor housing to be assembled is pre-placed on the sliding part 25, which carries the motor housing to the positioning frame 33 near the axial docking transfer mechanism 3, providing a positional basis for the docking shaft 31 to pass through the inner hole of the housing. This achieves stable transfer and positioning of the housing, avoiding bumps or displacement of the housing caused by manual handling.

[0033] See Figure 9 - Figure 11 The axial docking and transfer mechanism 3 also includes a positioning frame 33; the positioning frame 33 is mounted on the transfer trolley 1 and located beside the first axial push-alignment mechanism 2, and the docking shaft 31 is clearance-fitted with the positioning frame 33; in the docking state, the motor housing is supported on the sliding part 25 and close to the positioning frame 33, the docking shaft 31 passes through the motor housing and extends to the end of the motor rotor, and is engaged with the opening at the end of the motor rotor and rotated until the protrusion 32 faces downward, so as to support the motor rotor.

[0034] In the first assembly stage, i.e., the stage of installing the motor housing, the motor housing is supported on the sliding part 25 and slides to a position close to the positioning frame 33. The docking shaft 31 moves horizontally with the clearance fit of the positioning frame 33, passes through the inner hole of the motor housing, until its end protrusion 32 engages with the opening at the end of the motor rotor. Subsequently, the docking shaft 31 rotates, causing the protrusion 32 to turn downwards, forming radial support for the motor rotor and preventing the end of the motor rotor from sagging. At this time, the bearing contact part 22 can be lowered, and the docking shaft 31 replaces the bearing contact part 22 to support the front end of the motor rotor alone. In this way, when the motor housing is subsequently pushed from the docking shaft 31 to the motor rotor, the motor rotor is kept straight, and there will be no large-area tight contact between the inner wall of the housing and the outer surface of the motor rotor due to sagging, thereby avoiding sliding jamming and scratches.

[0035] See Figure 11 The axial docking and transfer mechanism 3 also includes a pushing part 34 and an abutting part 35. The pushing part 34 is slidably disposed on the positioning frame 33 and located above the docking shaft 31, and the pushing part 34 is clearance-fitted with the docking shaft 31. The abutting part 35 is fixed on the side of the pushing part 34 facing the motor rotor. The abutting part 35 is used to abut against the side of the motor housing or motor cover when the pushing part 34 slides axially along the docking shaft 31, so as to push the motor housing or motor cover along the docking shaft 31 to the outside of the motor rotor.

[0036] The pushing part 34 is slidably mounted on the positioning frame 33, located above the docking shaft 31 and clearance-fitted with the docking shaft 31. The abutting part 35 is fixed on the side of the pushing part 34 facing the motor rotor. In the second assembly stage, when the motor housing has been fitted onto the docking shaft 31, the pushing part 34 slides along the positioning frame 33 toward the motor rotor, and the abutting part 35 abuts against the rear side of the motor housing, pushing the motor housing smoothly along the docking shaft 31 to the outside of the motor rotor and finally docking with the output disc. This avoids skewing and jamming during the pushing process and prevents the inner wall of the housing from scratching the surface of the motor rotor.

[0037] In Example 2, after the installation of the motor housing, a certain gap still exists between the inner wall of the housing and the motor rotor. If the motor rotor is not effectively supported, the front end of the motor rotor will remain in a drooping, offset state. When installing the motor cover, the operator still needs to use a gantry crane to lift the front end of the motor rotor and then slide the motor cover onto the outside of the motor rotor. After insertion, the operator will use fasteners to initially connect the motor cover and the motor housing, but not tighten them; at this time, both the motor rotor and the motor cover are in an unstable state suspended by the crane. To ensure coaxiality, the operator must repeatedly adjust the gantry crane to ensure that the motor rotor and the motor cover are aligned and level before finally tightening the fasteners. If the alignment is inaccurate and tightening is forced, the wedge-shaped gap between the end face of the motor cover and the end face of the motor housing is forcibly eliminated, causing uneven bolt tensile stress on the mounting flange of the motor housing. This can easily lead to localized plastic deformation of the flange. Simultaneously, the fasteners are screwed in under inclined stress, causing uneven wear and adhesive wear between the internal and external threads, which can lead to thread seizure or stripping.

[0038] See Figure 9 - Figure 11 The bearing contact 22 resumes its upward support state, and the docking shaft 31, the pushing part 34, and the abutting part 35 resume their movement away from the motor rotor along the positioning frame 33. When the bearing contact 22 is in the upward support state to support the outside of the motor rotor and keep it flat, the docking shaft 31, the pushing part 34, and the abutting part 35 can move away from the motor rotor along the positioning frame 33, so that an assembly space for inserting the motor cover is formed between the end of the docking shaft 31 and the end of the motor rotor shaft.

[0039] In the third assembly stage, after the motor housing is installed, the bearing contact 22 rises again and supports the outside of the motor rotor, keeping the motor rotor straight. At this time, the docking shaft 31 has completed guiding the housing, and the bearing contact 22 takes over the support. The docking shaft 31, together with its pushing part 34 and abutting part 35, moves backward along the positioning frame 33 in a direction away from the motor rotor, creating axial space between the end of the docking shaft 31 and the end of the motor rotor shaft. This space is used for the next step of fitting the motor cover from the outside of the docking shaft 31, so that the motor cover does not need to be forcibly fitted while the motor rotor is drooping, avoiding the instability caused by the suspension adjustment of the lifting device and the repeated centering operations.

[0040] See Figure 10 The motor cover can be fitted onto the outside of the mating shaft 31, and its end face can be positioned against the abutment part 35.

[0041] After the docking shaft 31 is in a moving state, the motor cover can be inserted from the rear end along the outside of the docking shaft 31 and move axially until the front end face of the motor cover abuts against the abutment part 35.

[0042] See Figure 11 and Figure 12 The docking shaft 31 can move back towards the motor rotor from the moving away state, so that the protrusion 32 on the docking shaft 31 can be inserted into the opening at the end of the motor rotor to form a support; the bearing contact part 22 can descend from the rising support state; the pushing part 34 and the abutting part 35 can slide along the docking shaft 31 to push the motor cover from the docking shaft 31 to the side of the motor housing, thus completing the docking of the motor cover and the motor housing.

[0043] In the fourth assembly stage, after the motor cover is positioned on the docking shaft 31, the docking shaft 31 moves horizontally again towards the motor rotor, causing its protrusion 32 to re-engage into the opening at the end of the motor rotor and rotate to provide support, taking over the support of the motor rotor from the bearing contact 22. The bearing contact 22 then descends to avoid interference. At this time, the pushing part 34 drives the abutment part 35 to slide along the docking shaft 31, smoothly pushing the motor cover from the docking shaft 31 to the outside of the motor rotor until the motor cover aligns with the side of the already installed motor housing.

[0044] Through the alternating support of the bearing contact part 22 and the docking shaft 31, stable radial support for the motor rotor is maintained throughout the entire motor cover installation process, preventing the rotor from sagging or shifting due to its own weight. Simultaneously, the docking shaft 31 serves not only as a temporary support but also as a sliding guide for the motor cover, ensuring that the rotor remains straight without affecting the axial insertion and movement of the motor cover. This alternating support-yield-re-support mechanism ensures automatic alignment between the motor cover and the motor housing, thus avoiding the problems of localized plastic deformation of the motor housing mounting flange and seizing of fastener threads caused by repeated hoisting adjustments and forced corrections in existing technologies. See Figure 11 The abutment part 35 includes two horizontal rods 351 and two semi-circular blocks 352. The two horizontal rods 351 are respectively fixed to both sides of the push part 34, and the two semi-circular blocks 352 are respectively fixed to the ends of the corresponding horizontal rods 351. The openings of the two semi-circular blocks 352 are adapted to the outer contours of the motor housing and the motor cover, respectively, for forming an abutment with the motor housing and the motor cover.

[0045] In this embodiment, the abutment portion 35 consists of two transverse rods 351 fixed to both sides of the pushing portion 34, with a semi-circular block 352 fixed to the end of each transverse rod 351. The openings of the two semi-circular blocks 352 are respectively adapted to the outer circumferential contours of the motor housing and the motor cover. This makes the abutment more stable during the pushing process and avoids slippage caused by point contact.

[0046] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

Claims

1. A power transmission connection device for a high-power diesel generator set, comprising a transfer trolley (1), characterized in that: It also includes a first axial straightening mechanism (2), which is located on the transfer trolley (1) and below the motor rotor. It includes a liftable lifting part (21) and a bearing contact part (22) rotatably mounted on the top of the lifting part (21) via a rotating shaft. The bearing contact part (22) is provided with multiple ball bearings (23) for bearing the drooping motor rotor and allowing it to rotate back to axial straightness. An axial docking transfer mechanism (3) is provided on a transfer trolley (1) and includes a docking shaft (31) that can move horizontally and rotate, and a protrusion (32) is provided on the docking shaft (31). Before assembling the motor housing and motor cover, the docking shaft (31) is moved horizontally so that the protrusion (32) is inserted into the opening at the end of the motor rotor. Then it is rotated so that the protrusion (32) faces downward. After the bearing contact part (22) descends, it forms axial limit and radial support for the motor rotor, which works with the first axial push-alignment mechanism (2) to maintain the axial straightness of the motor rotor. The top surface of the bearing contact part (22) and the contact surface of the motor rotor are semi-circular structures. When the rising part (21) rises and the bearing contact part (22) contacts the motor rotor, the bearing contact part (22) can rotate and tilt relative to the rising part (21) through the rotating shaft, so that the opening of the semi-circular structure is adapted to the downward direction of the motor rotor. The ball bearing (23) maintains rolling contact with the outside of the motor rotor, so that the motor rotor can be synchronously rotated and adjusted to an axially straight state during the bearing reset process. The first axial thrust mechanism (2) also includes a multi-stage telescopic cylinder (24), which is installed on the transfer trolley (1) and located below the motor rotor. The multi-stage telescopic cylinder (24) is set away from the axial docking transfer mechanism (3), and its output end is connected to the lifting part (21) to drive the lifting part (21) to rise and fall.

2. The power transmission connection device for a high-power diesel generator set according to claim 1, characterized in that: The first axial thrust mechanism (2) also includes a sliding part (25); the sliding part (25) is slidably installed in the openings on both sides of the transfer trolley (1), and the bottom of the sliding part (25) is provided with a ball bearing that rolls with the opening. The sliding part (25) is used to support the motor housing to be assembled.

3. The power transmission connection device for a high-power diesel generator set according to claim 2, characterized in that: The axial docking transfer mechanism (3) also includes a positioning frame (33); the positioning frame (33) is located on the transfer trolley (1) and is located beside the first axial push-alignment mechanism (2), and the docking shaft (31) is in clearance fit with the positioning frame (33); in the docking state, the motor housing is supported on the sliding part (25) and close to the positioning frame (33), the docking shaft (31) passes through the motor housing and extends to the end of the motor rotor, and rotates with the opening at the end of the motor rotor until the protrusion (32) faces downward, so as to support the motor rotor.

4. The power transmission connection device for a high-power diesel generator set according to claim 3, characterized in that: The axial docking transfer mechanism (3) also includes a pushing part (34) and an abutting part (35); the pushing part (34) is slidably disposed on the positioning frame (33) and located above the docking shaft (31), and the pushing part (34) is clearance-fitted with the docking shaft (31); the abutting part (35) is fixed on the side of the pushing part (34) facing the motor rotor, and the abutting part (35) is used to abut against the side of the motor housing or motor cover when the pushing part (34) slides axially along the docking shaft (31), so as to push the motor housing or motor cover along the docking shaft (31) to the outside of the motor rotor.

5. The power transmission connection device for a high-power diesel generator set according to claim 4, characterized in that: The bearing contact (22) has an upward support state, and the docking shaft (31), the pushing part (34) and the abutting part (35) have a moving away state relative to the motor rotor along the positioning frame (33); when the bearing contact (22) is in the upward support state to support the outside of the motor rotor and keep it flat, the docking shaft (31), the pushing part (34) and the abutting part (35) can move away from the motor rotor along the positioning frame (33) so that an assembly space for inserting the power supply cover is formed between the end of the docking shaft (31) and the end of the motor rotor shaft.

6. The power transmission connection device for a high-power diesel generator set according to claim 5, characterized in that: The motor cover can be fitted onto the outside of the mating shaft (31) and its end face can be positioned against the abutment part (35).

7. A power transmission connection device for a high-power diesel generator set according to claim 6, characterized in that: The docking shaft (31) can move back towards the motor rotor from the moving state, so that the protrusion (32) on the docking shaft (31) can be inserted into the opening at the end of the motor rotor to form a support; the bearing contact part (22) can be lowered from the rising support state; the pushing part (34) and the abutting part (35) can slide along the docking shaft (31) to push the motor cover from the docking shaft (31) to the side of the motor housing, thus completing the docking of the motor cover and the motor housing.

8. A power transmission connection device for a high-power diesel generator set according to any one of claims 4-7, characterized in that: The abutting part (35) includes two horizontal rods (351) and two semi-circular blocks (352). The two horizontal rods (351) are fixed to both sides of the pushing part (34), and the two semi-circular blocks (352) are fixed to the ends of the corresponding horizontal rods (351). The openings of the two semi-circular blocks (352) are adapted to the outer contours of the motor housing and the motor cover, respectively, for forming an abutment with the motor housing and the motor cover.

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