Split type generator

Abstract

The utility model discloses a split type generator, which comprises a rotor, a stator and an end cover, the rotor is fixed on a rotating shaft through a flange and an expansion sleeve, the flange comprises a flange edge, the rotor is at least divided into three sections, the stator and the end cover are respectively at least divided into two sections, the flange and the expansion sleeve are respectively at least divided into two sections, and the expansion sleeve is fixed on the rotating shaft. A gap is formed between the inner surface of the expansion sleeve and the rotating shaft, the outer surface of the expansion sleeve is in contact with the inner surface of the flange, conical surfaces matched with each other are arranged at the contact parts of the expansion sleeve and the flange, and the generator tightens the expansion sleeve by connecting the split flanges, so that the rotating shaft is clasped. The flanges and the expansion sleeve are combined through conical surface nesting matching contact, tightening operation is conducted on the expansion sleeve through the connecting and fastening effect between the split flanges, and the purpose that the expansion sleeve tightly holds the rotating shaft is achieved. The contact area and the contact surface pressure of the expansion sleeve and the flange are large, the positive pressure of friction force generated on the contact surface is large, and the expansion sleeve and the rotating shaft can be clamped more tightly.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a split-petal generator. Background Art

[0002] In recent years, the International Maritime Organization has successively introduced a series of new standards such as the target-based new ship construction standard, the Energy Efficiency Index for Existing Ships (EEXI), and the Carbon Intensity Index for Transmission Operations (CII), which have put forward higher requirements for ship carbon dioxide emissions. The industry has found that the use of permanent magnet direct-drive shaft belt generators is currently the most effective means of energy conservation and emission reduction for ships. In ship modification projects, the original shaft (drive shaft) is not easy to change, and the disassembly and assembly of the shaft is difficult and the cycle is long, which will have a great impact on the normal operation of the ship. The industry generally recognizes that the most direct and efficient way to install a shaft belt generator on a ship is to use a shaft-holding shaft generator, which does not require the replacement of the shaft, saving modification costs and time. However, due to the influence of the shaft processing tolerance band, the outer diameter of the shaft where the shaft generator is installed is different, and generally requires expansion design based on the actual size of the shaft.

[0003] For example, the patent with the publication number CN117134568A discloses a half-type permanent magnet shaft-engaging generator and its assembly method, including a stator and a rotor, a rotor is arranged inside the stator, and also includes a clamping sleeve, two half-type clamping sleeves are connected end to end to form a clamping sleeve, two half-type stators are detachably connected to form a stator, two half-type rotors are detachably connected to form a rotor, the clamping sleeve is arranged inside the rotor, and the stator and the rotor are coaxially detachably connected. The stator and the rotor are completely independent and separate in terms of structural type and electromagnetic principle. In the reconstruction of an existing ship, the motor can be installed without changing the original structure and layout, so that the existing ship can achieve the goal of installing a shaft-engaging generator later.

[0004] In the above-mentioned patent, its

[0009] paragraph records that "a groove and a protrusion are respectively provided at both ends of the half-expansion sleeve, the groove is a dovetail groove, and the protrusion of one half-expansion sleeve is detachably connected to the groove of the other half-expansion sleeve". From this content, it can be seen that the connection method of the half-expansion sleeve in the technical solution of the patent is consistent with the connection method of the traditional expansion sleeve, and the expansion sleeve is divided into two halves and installed on the rotating shaft, which can only play a positioning role and cannot achieve the shaft clamping and tightening of the rotating shaft. Because the surface of the rotating shaft itself is not a mounting surface, the shape and position tolerances are large, the roundness is poor, and the surface may also appear uneven. The two halves of the expansion sleeve are rigid structures. When divided into two halves, the contact area with the rotating shaft is relatively small. It is impossible to exert a good grip function on the rotating shaft with poor surface roughness and large shape and position tolerance problems, which may result in the weakening of the torque transmission function. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a split-petal generator with a better rotating shaft clamping effect in view of the defects of the prior art.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A split-petal generator is used to be installed on a rotating shaft, comprising a rotor, a stator and an end cover, wherein the rotor is fixed to the rotating shaft by a flange and a clamping sleeve, the flange comprising a flange edge, the rotor is split into at least three petals, the stator and the end cover are each split into at least two petals, the flange and the clamping sleeve are each split into at least two petals, a gap is provided between the inner surface of the clamping sleeve and the rotating shaft, the outer surface of the clamping sleeve contacts the inner surface of the flange, and the contacting portion of the two is provided with mutually matching conical surfaces, and the generator achieves a clamping of the rotating shaft by connecting the split-petal flanges and then tightening the clamping sleeve.

[0008] Furthermore, a plurality of slits are formed in the axial direction at the end of the expansion sleeve close to the flange.

[0009] Furthermore, the expansion sleeve comprises a shaft-holding section and a flange section, the slit is opened on the shaft-holding section, and the flange section and the flange are tightened and connected into a whole by a tightening member.

[0010] Furthermore, the plurality of slits are evenly distributed on each axis-embracing segment.

[0011] Furthermore, a connecting hole is arranged on the flange section along the axial direction of the expansion sleeve, a mounting hole is arranged at the flange end corresponding to the connecting hole, and the tensioning member is arranged in the connecting hole and the mounting hole.

[0012] Furthermore, a cushion block is provided on the end surface of the flange section, a through hole corresponding to the position of the connecting hole is formed on the cushion block, and the tensioning member passes through the through hole.

[0013] Furthermore, the expansion sleeve is divided into three petals.

[0014] Furthermore, the rotor comprises a rotor support, the rotor support comprises a connecting edge extending toward the radial center, the connecting edge is connected to the flange edge; the rotor support is divided into multiple lobes.

[0015] Furthermore, mounting plates are provided at the head and tail connecting ends of each rotor bracket, and the rotor brackets of each lobe are connected to each other by providing connecting pieces on the mounting plates.

[0016] Furthermore, the rotor support is divided into three petals.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1) The flange and the expansion sleeve are combined through the conical nesting and fitting contact. The expansion sleeve is tightened by the connection and tightening effect between the petal flanges, so that the clamping force of the expansion sleeve on the rotating shaft can be adjusted, so that the expansion sleeve can clamp the rotating shaft tightly; at the same time, the contact area and contact surface pressure of the expansion sleeve and the flange are large, and the positive pressure of the friction force generated on the contact surface is large, which can also make the expansion sleeve and the rotating shaft hold tighter.

[0019] 2) The slit design of the expansion sleeve's shaft-holding section reduces the rigidity of the shaft-holding section, making it easier for the expansion sleeve to be tightened by the flange, generating greater contact pressure, thereby further increasing the clamping force of the expansion sleeve on the shaft, ensuring a good fit between the generator and the shaft, and improving the working reliability of the generator.

[0020] 3) The expansion sleeve is divided into three or more petals, which can increase the contact area between the expansion sleeve and the shaft with irregular surface, and can better exert the gripping effect on the shaft. In addition, for high-power generators, the structure of more than three petals reduces the weight and volume of each petal, which is more conducive to lifting and installation operations for the limited operating space at the installation site. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A cross-sectional view of the split-petal generator described in Example 1 installed on a rotating shaft;

[0022] Figure 2 This is a schematic diagram of the structure in which the flange and the expansion sleeve described in Example 1 are installed on the rotating shaft;

[0023] Figure 3 for Figure 2 Schematic diagram of the middle expansion sleeve divided into two halves;

[0024] Figure 4 This is a schematic diagram of the rotor structure described in Example 1;

[0025] Figure 5 This is a schematic structural diagram of the single-petal rotor support described in Example 1;

[0026] Figure 6 This is a schematic diagram of the structure in which the flange and the expansion sleeve described in Example 2 are installed on the rotating shaft;

[0027] Figure 7 for Figure 6 Schematic diagram of the structure of the middle expansion sleeve. DETAILED DESCRIPTION

[0028] In order to clearly illustrate the technical features of the present solution, the present technical solution is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0030] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0033] Example 1

[0034] A split-type generator for installation on a rotating shaft 1 of a ship is provided, such as Figure 1 As shown, the rotor 2, the stator 3 and the end cover 4 are included. The end cover 4 is connected to the rotor 2 through a fixing block 41 and forms a whole with the stator 3. The rotor 2 is divided into at least three lobes, and the stator 3 and the end cover 4 are divided into at least two lobes respectively. The rotor 2 is connected to the stator 3 through a fixing block 41 and the end cover 4 forms a whole with the stator 3. Figure 2 The flange 5 and the expansion sleeve 6 shown are fixed on the rotating shaft 1. The flange 5 includes a flange edge 51. There are two expansion sleeves 6, which are respectively located at both ends of the flange 5. The flange 5 and the expansion sleeve 6 are at least divided into two pieces to hold the rotating shaft 1. Specifically, Figure 3 As shown, the expansion sleeve 6 includes a shaft-holding section 61 and a flange section 62. A gap is provided between the inner surface of the shaft-holding section 61 and the rotating shaft 1. The outer surface of the shaft-holding section 61 contacts the inner surface of the flange 5, and the contacting portion of the two is provided with a matching conical surface 611. By fine-tuning the connection tightness between each flange petal, the expansion sleeve 6 can hold the rotating shaft 1 tightly.

[0035] In order to further enhance the clamping effect of the expansion sleeve on the rotating shaft, a plurality of slits 612 are also provided along the axial direction of the expansion sleeve 6. The direction of the slits 612 on the shaft-holding section is to extend from the end far from the flange section 62 to the flange section close to the flange section, and the plurality of slits are evenly distributed on each petal of the shaft-holding section; the generator tightens the slit expansion sleeve 6 through the flange 5 and then holds the rotating shaft 1, that is, the shaft-holding section is divided into a plurality of slightly loose individuals on the basis of the original expansion sleeve being divided into petals and each petal of the shaft-holding section being a whole. For the entire expansion sleeve, these loose individuals give the expansion sleeve a function of shrinking the diameter. The tighter the connection between the petal flanges, the smaller the diameter of the expansion sleeve 6 will shrink, and the stronger the clamping force of the expansion sleeve 6 on the rotating shaft 1 will be. In this embodiment, the number of slits 612 on the shaft-holding section of each petal of the expansion sleeve is one.

[0036] In this embodiment, the flange and the expansion sleeve are combined to clamp the rotating shaft. Compared with the clamping structure of the traditional half-motor and the rotating shaft, the contact area of ​​the expansion sleeve 6 and the rotating shaft 1 is large, and the positive pressure of the friction force generated on the contact surface is large. In particular, the slit design of the expansion sleeve shaft-holding section reduces the stiffness of the shaft-holding section 61, making it easier for the expansion sleeve shaft-holding section 61 to be tightened by the flange 5, thereby increasing the contact pressure between the expansion sleeve 6 and the contact surfaces of the flange 5 and the rotating shaft 1, and the expansion sleeve 6 and the rotating shaft 1 are clamped tighter, thereby ensuring a good fit between the generator and the rotating shaft and improving the working reliability of the generator.

[0037] In this embodiment, the flange 5 and the expansion sleeve 6 are both divided into two halves, and the halves are fastened by bolts. When installing, the expansion sleeve of the split halves is first positioned by the cylindrical pins of the flange section 62 and fastened by bolts to form a whole, and then installed into the corresponding or specified position of the rotating shaft 1, and then the axial position between the flange 5 and the expansion sleeve 6 is determined according to the designed interference, and then the flange 5 is connected by bolts between the flanges of each halves to make the expansion sleeve 6 tightly embrace the rotating shaft 1.

[0038] In order to prevent the expansion sleeve 6 from gradually loosening and withdrawing from the flange 5 due to the continuous vibration of the hull during operation, a circle of connecting holes 621 is set on the flange section 62 along the axial direction of the expansion sleeve, and a circle of mounting holes is set at the end of the flange 5 corresponding to the connecting holes. A tensioning member (not shown) is inserted into the two opposite connecting holes and mounting holes in turn, and the flange section 62 and the flange 5 are tightened and connected into a whole through the tensioning member. Among them, a pad (not shown) is also provided on the end face of the flange section, and a through hole corresponding to the position of the connecting hole is provided on the pad, and the tensioning member also penetrates the through hole. The design of the pad can make the contact stress of the flange and the expansion sleeve more uniform, improve the working reliability of the flange and the expansion sleeve to hold the rotating shaft, and achieve excellent matching between the generator and the rotating shaft. Preferably, the tensioning member is a bolt.

[0039] like Figure 4 As shown, the rotor includes a rotor support 21, such as Figure 5 As shown, the rotor support 21 includes a connecting edge 211 extending toward the radial center, and the connecting edge is connected to the flange edge to fix the rotor. In accordance with the rotor structure, the rotor support 21 is also divided into multiple lobes. In this embodiment, the rotor support is divided into three lobes, and a mounting plate 212 is provided at the head and tail connecting ends of each lobe rotor support. The rotor supports of each lobe are connected by bolts provided on the mounting plate 212. Generally, the mounting plate 212 is provided on the inner surface of the rotor support to facilitate assembly operations.

[0040] In this embodiment, the rotor / rotor bracket is divided into three or more lobes, which reduces the volume and weight of each lobe for a high-power generator and is more conducive to lifting and installation operations in the limited space at the installation site.

[0041] Example 2

[0042] The difference between this embodiment and embodiment 1 is that: Figure 6 and Figure 7 As shown, the expansion sleeve 6 is divided into three petals. The three-petal design can increase the contact area between the expansion sleeve and the rotating shaft with an irregular surface, and can better exert a gripping effect on the rotating shaft. Moreover, for a high-power generator, a structure with more than three petals reduces the weight and volume of each petal, which is more conducive to hoisting and installation operations at the installation site.

[0043] Example 3

[0044] The difference between this embodiment and embodiment 1 is that the flange is divided into three petals.

[0045] Obviously, the above embodiments are merely examples for clearly illustrating the technical solution of the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A split-flap generator, for mounting on a rotating shaft, characterized in that: It includes a rotor, a stator and an end cover, wherein the rotor is fixed to a rotating shaft through a flange and a clamping sleeve, the flange includes a flange edge, the rotor is divided into at least three petals, the stator and the end cover are divided into at least two petals, the flange and the clamping sleeve are respectively divided into at least two petals, a gap is provided between the inner surface of the clamping sleeve and the rotating shaft, the outer surface of the clamping sleeve contacts the inner surface of the flange, and the contacting portion of the two is provided with mutually matching conical surfaces, and the generator realizes the clamping of the rotating shaft by connecting the petaled flanges and then tightening the clamping sleeve.

2. The split-petal generator according to claim 1, characterized in that: The end of the expansion sleeve close to the flange is provided with a plurality of slits along the axial direction.

3. The split-petal generator according to claim 2, characterized in that: The expansion sleeve comprises a shaft-holding section and a flange section, the slit is formed on the shaft-holding section, and the flange section and the flange are tightened and connected into a whole through a tightening piece.

4. The split-petal generator according to claim 3, characterized in that: The plurality of slits are evenly distributed on each shaft-embracing segment.

5. The split-petal generator according to claim 3, characterized in that: A connecting hole is arranged on the flange section along the axial direction of the expansion sleeve, a mounting hole is arranged at the flange end corresponding to the connecting hole, and the tensioning member is arranged in the connecting hole and the mounting hole.

6. The split-petal generator according to claim 5, characterized in that: A cushion block is provided on the end surface of the flange section, a through hole corresponding to the position of the connecting hole is formed on the cushion block, and the tensioning member passes through the through hole.

7. The split-petal generator according to claim 1, characterized in that: The expansion sleeve is divided into three petals.

8. The split-petal generator according to claim 1, characterized in that: The rotor comprises a rotor support, the rotor support comprises a connecting edge extending toward the radial center, the connecting edge is connected to the flange edge; the rotor support is divided into multiple lobes.

9. The split-petal generator according to claim 8, characterized in that: Mounting plates are provided at the head and tail connecting ends of each rotor bracket, and the rotor brackets of each lobe are connected with each other by connecting pieces provided on the mounting plates.

10. The split-petal generator according to claim 8, characterized in that: The rotor support is divided into three petals.

Images