CN115296465A - Stator split type end cover permanent magnet auxiliary exciter - Google Patents

Stator split type end cover permanent magnet auxiliary exciter Download PDF

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Publication number
CN115296465A
CN115296465A CN202211065873.1A CN202211065873A CN115296465A CN 115296465 A CN115296465 A CN 115296465A CN 202211065873 A CN202211065873 A CN 202211065873A CN 115296465 A CN115296465 A CN 115296465A
Authority
CN
China
Prior art keywords
permanent magnet
exciter
end cover
stator
end cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211065873.1A
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Chinese (zh)
Inventor
蔡恒川
刘崇德
于鲁闽
王正平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Qilu Motor Manufacturing Co Ltd
Original Assignee
Shandong Qilu Motor Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shandong Qilu Motor Manufacturing Co Ltd filed Critical Shandong Qilu Motor Manufacturing Co Ltd
Priority to CN202211065873.1A priority Critical patent/CN115296465A/en
Publication of CN115296465A publication Critical patent/CN115296465A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The utility model provides a vice exciter of stator split type end cover permanent magnetism, relates to vice exciter technical field of permanent magnetism, has solved that there is vibration standard exceeding and the big, the big problem of the installation degree of difficulty of three bearing structure vibrations in two bearing structure of three brushless excitation turbonators, include: the end cover permanent magnet auxiliary exciter stator and the end cover permanent magnet auxiliary exciter rotor are thermally sleeved on a generator rotor, the end cover permanent magnet auxiliary exciter stator is installed on an outer end cover of a generator through a fixing and adjusting assembly, and the end cover permanent magnet auxiliary exciter stator is arranged in a multi-lobe structure; the permanent magnet auxiliary exciter is not arranged on the small exciter shaft outside the bearing, but the space between the bearing and the outer end cover of the generator is fully utilized, and the permanent magnet auxiliary exciter is arranged on the outer end cover of the generator inside the bearing, so that the small exciter shaft is only provided with the main exciter rotor, the length of the small exciter shaft is shortened, and the problem of large vibration of rotor shaft systems of two support structures is solved.

Description

Stator split type end cover permanent magnet auxiliary exciter
Technical Field
The invention relates to the technical field of permanent magnet auxiliary exciters, in particular to a stator split type end cover permanent magnet auxiliary exciter.
Background
The three-machine brushless excitation turbonator mainly comprises a generator, a main exciter, a permanent magnet auxiliary exciter and a bearing. The bearings are respectively positioned at two ends of the generator and support the rotor of the generator (called as two support structures), the rotors of the main exciter and the permanent magnet auxiliary exciter are sleeved on a rotating shaft (called as an exciter small shaft), the exciter small shaft and the generator rotor form a shaft system in a flange connection mode, and the exciter small shaft is suspended outside the bearings to form a cantilever structure. Because two rotors of a main exciter and a permanent magnet auxiliary exciter are arranged on the small exciter shaft, the cantilever structure is too long, and the shaking value of the outer end of the small exciter shaft is difficult to guarantee when the rotors rotate, so that the vibration value of the whole shaft system exceeds the standard. In order to overcome the problems, a part of the turbogenerator products is additionally provided with a bearing (called as a third support) outside the small shaft of the exciter, and the rotor of the whole turbogenerator is supported by three bearings (called as a three-support structure). Although the three-support structure solves the problem of large shaking degree of the outer end of the small shaft of the exciter to a great extent, the three-support structure increases difficulty for the installation of the turbonator and also brings the problem of large vibration of the third support.
Therefore, when the three-unit brushless excitation steam turbine generator adopts a two-support structure, the excitation small shaft is suspended outside the bearing, the vibration of a rotor shaft system is easy to exceed the standard, and when the three-support structure is adopted, the vibration of the third support is large, and the installation difficulty is increased.
Disclosure of Invention
The invention provides a stator split type end cover permanent magnet auxiliary exciter, and provides a structure of a permanent magnet auxiliary exciter, which can solve the problems of large equipment vibration and difficult installation caused by the structural characteristics of the stator split type end cover permanent magnet auxiliary exciter.
The invention provides a stator split type end cover permanent magnet auxiliary exciter, which comprises: the end cover permanent magnet auxiliary exciter stator and the end cover permanent magnet auxiliary exciter rotor are sleeved on the generator rotor in a heating mode, the end cover permanent magnet auxiliary exciter stator is installed on an outer end cover of the generator through a fixing and adjusting assembly, and the end cover permanent magnet auxiliary exciter stator is of a multi-lobe structure. The auxiliary permanent magnet exciter is not arranged on the small exciter shaft outside the bearing, but the space between the bearing and the outer end cover of the generator is fully utilized, and the auxiliary permanent magnet exciter is arranged on the outer end cover of the generator inside the bearing, so that only the main exciter rotor is arranged on the small exciter shaft, the length of the small exciter shaft is shortened, and the problem of large vibration of two support structure rotor shaft systems is solved.
Further, the permanent magnet on the end cover permanent magnet auxiliary exciter rotor is fixed on the annular sleeve in a surface-mounted mode, and the end cover permanent magnet auxiliary exciter rotor is integrally arranged on the generator rotor in a hot sleeve mode.
Further, the fixed adjusting assembly comprises 1 fixing bolt and 3 adjusting screws, the end cover permanent magnet auxiliary exciter stator is connected with the outer end cover of the generator through the fixing bolt, and the 3 adjusting screws are distributed around the fixing bolt in a triangular mode.
Furthermore, the fixed adjusting assemblies are arranged into a plurality of groups, and the end cover permanent magnet auxiliary exciter stator is fixed on the outer end cover of the generator through the plurality of groups of fixed adjusting assemblies. When the end cover permanent magnet auxiliary exciter stator is installed, the axial size of the end cover permanent magnet auxiliary exciter stator at each fixed adjusting assembly is controlled by adjusting the screwing-out length delta of the adjusting screw, and the parallelism of the inner circle of the end cover permanent magnet auxiliary exciter stator and the outer circle of the end cover permanent magnet auxiliary exciter rotor is finally ensured through the mutual matching of the plurality of fixed adjusting assemblies.
Further, the end cover permanent magnet auxiliary exciter stator comprises an end cover permanent magnet auxiliary exciter stator upper petal and an end cover permanent magnet auxiliary exciter stator lower petal, and the end cover permanent magnet auxiliary exciter stator upper petal is connected with the end cover permanent magnet auxiliary exciter stator lower petal through a positioning block. The end cover permanent magnet auxiliary exciter stator adopts a winding mode of fractional slot concentrated windings, so that the end cover permanent magnet auxiliary exciter stator can be designed into a split structure, and the purpose is that the end cover permanent magnet auxiliary exciter stator is convenient to disassemble and assemble during installation and maintenance.
Furthermore, a plurality of end cover tensioning assemblies are arranged between the outer end cover of the generator and the inner end cover of the generator, each end cover tensioning assembly comprises a jacking sleeve and a tensioning bolt, each jacking sleeve is arranged between the outer end cover of the generator and the inner end cover of the generator, each tensioning bolt is arranged in each jacking sleeve, each jacking sleeve is tensioned, and the outer end cover of the generator and the inner end cover of the generator are fixed together in a one-jacking-one-pulling mode through the jacking sleeves and the tensioning bolts, so that the rigidity of the outer end cover of the generator is improved, and vibration is reduced.
Further, the jacking sleeve is connected with a contact surface of the outer end cover of the generator in a welding mode.
Furthermore, the positioning block is of a trapezoidal structure, the binding surfaces of the two lobes of the stator are positioned through the trapezoidal positioning block, and the two lobes of the stator can be rapidly and accurately positioned when being installed at each time.
The invention has the beneficial effects that: the auxiliary permanent magnet exciter is not arranged on the small exciter shaft outside the bearing, but the space between the bearing and the outer end cover of the generator is fully utilized, and the auxiliary permanent magnet exciter is arranged on the outer end cover of the generator inside the bearing, so that only the main exciter rotor is arranged on the small exciter shaft, the length of the small exciter shaft is shortened, and the problem of large vibration of two support structure rotor shaft systems is solved; the stator of the permanent magnet auxiliary exciter is fixed on the outer end cover of the generator through a plurality of fixing and adjusting assemblies, and the inner circle of the stator of the permanent magnet auxiliary exciter can be ensured to be parallel to the outer circle of the rotor.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic view of the mounting structure of the present invention.
FIG. 2 is a schematic structural view of an end cap tensioning assembly.
Fig. 3 isbase:Sub>A schematic view of the structure in the directionbase:Sub>A-base:Sub>A of fig. 1.
Fig. 4 is a schematic view of the structure in the direction B of fig. 3.
In the figure, 1, an end cover permanent magnet auxiliary exciter stator, 2, an end cover permanent magnet auxiliary exciter rotor, 3, an end cover tensioning assembly, 4, a jacking sleeve, 5, a tensioning bolt, 6, a positioning block, 7, a fixing and adjusting assembly, 8, a fixing bolt, 9, an adjusting screw, 10, an outer end cover of a generator, 11, an inner end cover of the generator, 12, a bearing, 13, a generator rotor, 14, an upper petal of the end cover permanent magnet auxiliary exciter stator, 15, a lower petal of the end cover permanent magnet auxiliary exciter stator, 16 and a small exciter shaft.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-4, a stator split end cover permanent magnet sub-exciter comprises: the end cover permanent magnet auxiliary exciter comprises an end cover permanent magnet auxiliary exciter stator 1 and an end cover permanent magnet auxiliary exciter rotor 2, permanent magnets on the end cover permanent magnet auxiliary exciter rotor 2 are fixed on an annular sleeve in a surface pasting mode, the end cover permanent magnet auxiliary exciter rotor 2 is integrally arranged on a generator rotor 13 in a hot sleeve mode, the end cover permanent magnet auxiliary exciter stator 1 is installed on an outer end cover 10 of a generator through a fixing and adjusting assembly 7, and the end cover permanent magnet auxiliary exciter stator 1 is of a multi-petal structure. The permanent magnet auxiliary exciter is not arranged on the small exciter shaft outside the bearing, but the space between the bearing and the outer end cover of the generator is fully utilized, and the permanent magnet auxiliary exciter is arranged on the outer end cover 10 of the generator inside the bearing 12, so that the small exciter shaft 16 is only provided with the main exciter rotor, the length of the small exciter shaft is shortened, and the problem of large vibration of the rotor shaft systems of two support structures is solved.
The fixed adjusting component 7 is set to be a plurality of groups, the end cover permanent magnet auxiliary exciter stator 1 is fixed on the outer end cover 10 of the generator through the plurality of groups of fixed adjusting components 7, the fixed adjusting component 7 comprises 1 fixing bolt 8 and 3 adjusting screws 9, the end cover permanent magnet auxiliary exciter stator 1 is arranged on the outer end cover 10 of the generator through the fixing bolt 8, and the 3 adjusting screws 9 are distributed around the fixing bolt 8 in a triangular mode. When the end cover permanent magnet auxiliary exciter stator 1 is installed, the axial size of the end cover permanent magnet auxiliary exciter stator 1 at each fixed adjusting assembly is controlled by adjusting the screwing-out length delta of the adjusting screw 9, and the parallelism of the inner circle of the end cover permanent magnet auxiliary exciter stator 1 and the outer circle of the end cover permanent magnet auxiliary exciter rotor 2 is finally guaranteed through the mutual matching of the plurality of fixed adjusting assemblies.
The end cover permanent magnet auxiliary exciter stator 1 comprises an end cover permanent magnet auxiliary exciter stator upper lobe 14 and an end cover permanent magnet auxiliary exciter stator lower lobe 15, the end cover permanent magnet auxiliary exciter stator upper lobe 14 is connected with the end cover permanent magnet auxiliary exciter stator lower lobe 15 through a positioning block 6, the positioning block 6 is of a trapezoid structure, the binding face of the two lobes of the stator is positioned through the trapezoid positioning block 6, and the two lobes of the stator can be rapidly and accurately positioned during each installation. The auxiliary exciter stator 1 of the end cover permanent magnet adopts a winding mode of fractional slot concentrated winding, so that the auxiliary exciter stator 1 of the end cover permanent magnet can be designed into a split structure, and is convenient to disassemble and assemble during installation and maintenance.
A plurality of end cover tensioning assemblies 3 are arranged between an outer end cover 10 of the generator and an inner end cover 11 of the generator, each end cover tensioning assembly 3 comprises a jacking sleeve 4 and a tensioning bolt 5, each jacking sleeve 4 is arranged between the outer end cover 10 of the generator and the inner end cover 11 of the generator, each tensioning bolt 5 is arranged in each jacking sleeve 4, and each jacking sleeve 4 is connected with a contact surface of the outer end cover 10 of the generator in a welding mode. The jacking sleeve 4 is tightened, and the generator outer end cover 10 and the generator inner end cover 11 are fixed together in a one-top-one-pull mode through the jacking sleeve 4 and the tensioning bolt 5, so that the rigidity of the generator outer end cover 10 is improved, and vibration is reduced.
The invention has the beneficial effects that: the permanent magnet auxiliary exciter is not arranged on the small exciter shaft outside the bearing, but the space between the bearing and the outer end cover of the generator is fully utilized, and the permanent magnet auxiliary exciter is arranged on the outer end cover of the generator inside the bearing, so that the small exciter shaft is only provided with the main exciter rotor, the length of the small exciter shaft is shortened, and the problem of large vibration of two supporting structure rotor shaft systems is solved; the stator of the permanent magnet auxiliary exciter is fixed on the outer end cover of the generator through a plurality of fixing and adjusting assemblies, and the inner circle of the stator of the permanent magnet auxiliary exciter can be ensured to be parallel to the outer circle of the rotor.
Although the present invention has been described in detail in connection with the preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions should be within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure and the scope of the present invention.

Claims (8)

1. A stator split end cover permanent magnet auxiliary exciter, comprising: the end cover permanent magnet auxiliary exciter stator and the end cover permanent magnet auxiliary exciter rotor are sleeved on the generator rotor in a heating mode, the end cover permanent magnet auxiliary exciter stator is installed on an outer end cover of the generator through a fixing and adjusting assembly, and the end cover permanent magnet auxiliary exciter stator is of a multi-lobe structure.
2. The stator split end cover permanent magnet sub-exciter according to claim 1, wherein the permanent magnets on the end cover permanent magnet sub-exciter rotor are fixed on the annular sleeve in a surface-mounted manner, and the end cover permanent magnet sub-exciter rotor is integrally arranged on the generator rotor in a shrink-fit manner.
3. The stator split end cap permanent magnet sub-exciter of claim 1, wherein the fixed adjustment assembly comprises 1 fixing bolt and 3 adjusting screws, the end cap permanent magnet sub-exciter stator is connected to the outer end cap of the generator through the fixing bolt, and the 3 adjusting screws are distributed around the fixing bolt in a triangular manner.
4. The stator split end cap permanent magnet sub-exciter of claim 3, wherein the fixed adjustment assemblies are arranged in a plurality of sets, and the end cap permanent magnet sub-exciter stator is fixed on the outer end cap of the generator by the plurality of sets of fixed adjustment assemblies.
5. The stator split end cap permanent magnet secondary exciter of claim 1, wherein the end cap permanent magnet secondary exciter stator comprises an end cap permanent magnet secondary exciter stator upper lobe and an end cap permanent magnet secondary exciter stator lower lobe, and the end cap permanent magnet secondary exciter stator upper lobe is connected with the end cap permanent magnet secondary exciter stator lower lobe through a positioning block.
6. The stator split end cap permanent magnet sub-exciter of claim 5, wherein the locating blocks are arranged in a trapezoidal configuration.
7. The stator split end cap permanent magnet sub-exciter of claim 1, wherein a plurality of end cap tensioning assemblies are disposed between the generator outer end cap and the generator inner end cap, the end cap tensioning assemblies comprising a jacking sleeve disposed between the generator outer end cap and the generator inner end cap and tensioning bolts disposed in the jacking sleeve.
8. The stator split end cap permanent magnet sub-exciter of claim 1, wherein the tightening sleeve is connected with the contact surface of the outer end cap of the generator by welding.
CN202211065873.1A 2022-09-01 2022-09-01 Stator split type end cover permanent magnet auxiliary exciter Pending CN115296465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211065873.1A CN115296465A (en) 2022-09-01 2022-09-01 Stator split type end cover permanent magnet auxiliary exciter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211065873.1A CN115296465A (en) 2022-09-01 2022-09-01 Stator split type end cover permanent magnet auxiliary exciter

Publications (1)

Publication Number Publication Date
CN115296465A true CN115296465A (en) 2022-11-04

Family

ID=83833057

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211065873.1A Pending CN115296465A (en) 2022-09-01 2022-09-01 Stator split type end cover permanent magnet auxiliary exciter

Country Status (1)

Country Link
CN (1) CN115296465A (en)

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