Connecting device and connecting process for shaft of journal sticking type permanent magnet generator

Abstract

The invention relates to the technical field of ship power systems, and discloses a connecting device and a connecting process of a journal sticking type permanent magnet generator shaft, the device comprises a rotor, a Half flange and a generator shaft flange, the Half flange is arranged between the rotor and the generator shaft flange, and the Half flange is respectively connected with the generator shaft flange and the rotor flange. An inner ring bolt and an outer ring bolt are designed on a Half flange, the inner ring bolt is connected with a shaft flange, the outer ring bolt is connected with a rotor flange, a generator shaft can be stripped from a generator in the bow direction and the stern direction, the Half flange is fixed through two temporary Half flange fixing plates, it is ensured that the Half flange is accurately installed on the generator shaft flange, and the device is safe, simple and convenient to use. The situation that a generator shaft can only be stripped from a generator in a single direction due to the fact that the ship environment is limited is avoided, and meanwhile a matched hole between the generator shaft with the weight of several tons and a rotor is converted into a matched hole between the portable Half flange and the rotor.

Description

Technical Field

[0001] The present invention relates to the field of ship power systems, and in particular to a connecting device for a shaft-holding permanent magnet generator shaft and a connecting process thereof. Background Art

[0002] The shaft-mounted permanent magnet generator is favored by shipowners and designers because of its simple and compact structure, light weight and easy installation compared to the gearbox shaft-belt generator. The common installation method is to connect the generator shaft flange to the rotor flange. During the later stage of shaft generator internal maintenance, the generator shaft can only be removed from the shaft generator body in one direction, which is relatively strict for the shipyard layout requirements; if the generator shaft flange is directly connected to the rotor flange, both the rotor flange and the shaft generator shaft flange need to be customized, which also involves the selection of the shaft generator.

[0003] The patent application with publication number CN 108599507A discloses a marine shaft-enclosed permanent magnet generator and its installation method. The marine shaft-enclosed permanent magnet generator comprises a main engine, which is installed in the hull, the output shaft of the main engine is connected to a transmission shaft for driving a propeller through an intermediate shaft, the intermediate shaft is installed with a permanent magnet generator, the permanent magnet of the permanent magnet generator is installed on the intermediate shaft, the stator of the permanent magnet generator is installed in the casing of the permanent magnet generator, and the casing is fixed to the hull.

[0004] During the later stage of shaft generator internal maintenance of the prior art device, the generator shaft can only be removed from the shaft generator body in a single direction, which places relatively strict requirements on the shipyard layout and is inconvenient to operate.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a connection device and connection process for the shaft of a shaft-holding permanent magnet generator, so that the shaft of the shaft generator can be peeled off from the shaft generator in multiple directions, and at the same time, the matching holes between the generator shaft weighing more than several tons and the shaft generator rotor are converted into matching holes between a lightweight Half flange and the rotor.

[0007] The technical solution adopted by the present invention is: A connecting device for a shaft-holding permanent magnet generator shaft comprises a rotor, a half flange, a generator shaft flange and a generator shaft. A half flange is arranged between the rotor and the generator shaft flange, and the generator shaft flange and the rotor flange are connected to the inner and outer sides of the half flange respectively.

[0008] By adopting the above structure, the shaft generator shaft can be peeled off from the shaft generator in multiple directions, and at the same time, the matching holes between the generator shaft weighing more than several tons and the shaft generator rotor are converted into matching holes between a lightweight Half flange and the rotor.

[0009] Preferably, an inner bolt hole and an outer bolt hole are respectively provided on the inner and outer sides of the Half flange, and a groove is provided on one side of the outer bolt hole of the Half flange.

[0010] Preferably, the inner bolt holes of the Half flange are connected to the generator shaft flange through inner ring fixing bolts, and the outer bolt holes are connected to the rotor flange through outer ring fixing bolts.

[0011] By adopting the above structure, inner bolt holes and outer bolt holes are provided, so that the Half flange is conveniently connected and fixed with the generator shaft flange and the rotor flange, and is convenient for disassembly.

[0012] Preferably, the groove on the outer side of the Half flange is clamped with the rotor flange.

[0013] By adopting the above structure, the connection between the Half flange and the rotor flange is more firmly established.

[0014] Preferably, the relative generator shaft flanges on the generator shaft are staggered, and the edges of the relative generator shaft flanges form staggered steps. The Half flange is stuck in the staggered steps and is arranged in contact with the two relative generator shaft flanges.

[0015] By adopting the above structure, the connection between the Half flange and the generator shaft flange is more tightly secured.

[0016] Preferably, the rotor is connected to the stator of the generator.

[0017] Preferably, a connection process of a connection device for a shaft-holding permanent magnet generator shaft comprises the following steps: Step 1: Design the Half flange into one left and one right piece; Step 2: According to the positions of the bolt holes on the shaft flange of the shaft generator and the bolt holes on the rotor flange, process the inner bolt holes and the outer bolt holes on the matching half flange; Step 3: Install the half flange onto the generator shaft flange in the workshop or at the dock, and fix the half flange with the half flange fixing plate; Step 4: Tighten the shaft and half flange bolts; Step 5: Insert the shaft with half flange into the generator, temporarily fix the shaft system, and hoist it as a whole; Step 6: After the shaft alignment is completed, tighten the half flange and outer ring fixing bolts; Step 7: In the later stage of maintenance, remove the half flange and outer ring fixing bolts, and the shaft can be pulled out from the stern; Step 8: In the later stage of maintenance, disassemble the Half flange and the outer ring fixing bolts and the inner ring fixing bolts, remove the Half flange, and the shaft can be pulled out from the bow.

[0018] By adopting the above process, the generator shaft can be stripped from the generator safely, flexibly, quickly and without direction constraints.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The device of the present invention is safe and simple. It is no longer limited by the onboard environment and can only peel the generator shaft from the generator in one direction. At the same time, the matching hole between the generator shaft weighing more than several tons and the rotor is converted into a matching hole between a lightweight half flange and the rotor.

[0020] 2. The device of the present invention connects the generator shaft flange and the rotor flange through a half flange, so that the shaft generator shaft can be peeled off from the shaft generator in multiple directions.

[0021] 3. The half flange of the device of the present invention is provided with inner bolt holes and outer bolt holes, so as to facilitate connection and fixation with the generator shaft flange and the rotor flange and facilitate disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the connection of the Half flange of the present invention; Figure 3 It is a structural schematic diagram of the Half flange of the present invention; Figure 4 It is a structural schematic diagram of the Half flange fixing plate of the present invention.

[0023] Among them: 1. Stator; 2. Rotor; 3. Half flange; 4. Generator shaft flange; 5. Outer ring fixing bolts; 6. Inner ring fixing bolts; 7. Generator shaft; 8. Half flange fixing plate; 9. Outer bolt hole; 10. Groove; 11. Inner bolt hole. DETAILED DESCRIPTION

[0024] like Figure 1-4 As shown, a connecting device for the shaft of a shaft-holding permanent magnet generator includes a rotor 2, a half flange 3, a generator shaft flange 4, and a generator shaft 7. A half flange 3, i.e., an annular flange composed of two half flanges, is arranged between the rotor 2 and the generator shaft flange 4. The inner and outer sides of the half flange 3 are respectively connected to the generator shaft flange 4 and the rotor flange, and the rotor 2 is connected to the generator stator 1. The device realizes that the shaft generator shaft can be peeled off from the shaft generator in multiple directions, and at the same time, realizes that the matching hole between the generator shaft weighing more than several tons and the shaft generator rotor is converted into a matching hole between a lightweight half flange and the rotor.

[0025] The inner and outer sides of the half flange 3 are respectively provided with inner bolt holes 11 and outer bolt holes 9, and the half flange 3 is provided with a groove 10 on one side of the outer bolt hole 9. The inner bolt hole 11 of the half flange 3 is connected to the generator shaft flange 4 through the inner ring fixing bolt 6, and the outer bolt hole 9 is connected to the rotor flange through the outer ring fixing bolt 5. The groove 10 on the outer side of the half flange 3 is clamped with the rotor flange. It is convenient to connect and fix with the generator shaft flange 4 and the rotor flange, and convenient to disassemble.

[0026] The generator shaft flanges 4 on the generator shaft 7 are staggered, and the edges of the generator shaft flanges 4 form staggered steps. The half flange 3 is stuck in the staggered steps and is arranged close to the two opposite generator shaft flanges 4. The half flange 3 is more firmly connected to the generator shaft flange 4.

[0027] A connection process of a connection device for a shaft-holding permanent magnet generator shaft, comprising the following steps: Step 1: Design the Half flange into one left and one right piece, namely flange 3-a and flange 3-b, with flexible design; Step 2: According to the positions of the bolt holes on the shaft flange 4 of the shaft generator and the bolt holes on the rotor flange, process the inner bolt holes 11 and the outer bolt holes 9 on the matching half flange; Step 3: Install the half flange 3 onto the generator shaft flange 4 in a workshop or at the dock, and fix the half flange 3 with the half flange fixing plate 8 to ensure that the half flange 3 is properly installed on the generator shaft flange 4; Step 4: Tighten the shaft and half flange bolts 6; Step 5: Insert the shaft with half flange 3 into the shaft generator, temporarily fix the shaft system, and hoist it as a whole; Step 6: After the shaft alignment is completed, tighten the half flange 3 and the outer ring fixing bolts 5; Step 7: In the later stage of maintenance, remove the half flange 3 and the outer ring fixing bolts 5, and the shaft can be pulled out from the stern; Step 8: In the later stage maintenance, disassemble the Half flange 3 and the outer ring fixing bolts 5 and the inner ring fixing bolts 6, remove the Half flange 3, and the shaft can be pulled out from the bow.

[0028] The present invention isolates the generator shaft flange 4 from the rotor flange independently. When the outer ring fixing bolts 5 of the rotor 2 and the half flange 3 are not connected, there is no need to consider the influence of magnetic bias force caused by the inability to ensure the same gap between the rotor and the stator on the circumference during the shaft system winding process. The device used in the present invention is both safe and simple. It is no longer limited by the onboard environment and can only peel the generator shaft from the generator in one direction. At the same time, the matching hole between the generator shaft weighing more than several tons and the rotor is converted into a matching hole between the portable half flange and the rotor. The connection process of the device is easy to operate and more convenient to use.

[0029] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should be included in the protection scope determined by the claims of the present invention.

Claims

1. A connecting device for a shaft-holding permanent magnet generator shaft, comprising a rotor, a half flange, a generator shaft flange, and a generator shaft, characterized in that: A Half flange is arranged between the rotor and the generator shaft flange, and the inner and outer sides of the Half flange are respectively connected to the generator shaft flange and the rotor flange.

2. The connecting device for the shaft of a shaft-holding permanent magnet generator according to claim 1, characterized in that: The inner and outer sides of the Half flange are respectively provided with an inner bolt hole and an outer bolt hole, and the Half flange is provided with a groove on one side of the outer bolt hole.

3. The connecting device for the shaft of a shaft-holding permanent magnet generator according to claim 2 is characterized in that: The inner bolt holes of the Half flange are connected to the generator shaft flange through inner ring fixing bolts, and the outer bolt holes are connected to the rotor flange through outer ring fixing bolts.

4. The connecting device for the shaft of a shaft-holding permanent magnet generator according to claim 2, characterized in that: The groove on the outer side of the Half flange is clamped with the rotor flange.

5. The connecting device for the shaft of a shaft-holding permanent magnet generator according to claim 1, characterized in that: The generator shaft flanges on the generator shaft are arranged in a staggered manner, and the edges of the generator shaft flanges are arranged in a staggered manner. The half flange is stuck in the staggered step and is arranged in contact with the two relative generator shaft flanges.

6. The connecting device for the shaft of a shaft-holding permanent magnet generator according to claim 1, characterized in that: The rotor is connected to the stator of the generator.

7. The connection process of the connection device for the shaft of a shaft-holding permanent magnet generator according to claim 1 is characterized in that: The following steps are involved: Step 1: Design the Half flange into one left and one right piece; Step 2: According to the positions of the bolt holes on the shaft flange of the shaft generator and the bolt holes on the rotor flange, process the inner bolt holes and the outer bolt holes on the matching half flange; Step 3: Install the half flange onto the generator shaft flange in the workshop or at the dock, and fix the half flange with the half flange fixing plate; Step 4: Tighten the shaft and half flange bolts; Step 5: Insert the shaft with half flange into the generator, temporarily fix the shaft system, and hoist it as a whole; Step 6: After the shaft alignment is completed, tighten the half flange and outer ring fixing bolts; Step 7: In the later stage of maintenance, remove the half flange and outer ring fixing bolts, and the shaft can be pulled out from the stern; Step 8: In the later stage of maintenance, disassemble the Half flange and the outer ring fixing bolts and the inner ring fixing bolts, remove the Half flange, and the shaft can be pulled out from the bow.

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