CN210517953U - Large-scale box type variable-frequency variable-speed synchronous brushless excitation generator - Google Patents

Abstract

The utility model discloses a large box type variable-frequency variable-speed synchronous brushless excitation generator, which comprises an integrated casing, wherein a cooler is arranged on the upper side of the integrated casing, an air inlet and an air outlet are arranged on the cooler, and a stator component is arranged in the integrated casing in a clearance fit manner; the wind cooling device is characterized by further comprising a rotor assembly which is installed in the stator assembly in a matched mode, wind shields are installed on two sides of the stator assembly along the axial direction of the rotor at intervals, axial flow fans are arranged at positions, corresponding to the wind shields, of two ends of the rotor assembly, a hot air area is formed between the two wind shields inside the integrated shell, the hot air area is communicated with an air inlet on the cooler, a cold air area is formed outside the two wind shields and is communicated with an air outlet on the cooler, and the cold air area and the hot air area are communicated through the axial flow fans to; the utility model discloses a box structure, modularization equipment design, greatly reduced installation cost and manufacturing cost, the wind path does not produce alternately when guaranteeing the generator operation simultaneously, guarantees that the motor has better cooling effect.

Description

Large-scale box type variable-frequency variable-speed synchronous brushless excitation generator

Technical Field

The utility model relates to a large-scale box generator technical equipment field, in particular to synchronous brushless excitation generator of large-scale box frequency conversion variable speed.

Background

Along with the development of the energy, the application of the natural gas energy is more and more extensive, but the distribution of the energy is not even, the natural gas needs to carry out pipeline transportation, the natural gas pipeline has set up many pressure boost decompression stations, in the decompression process, its energy is huge, now the white loss, for the energy saving, adopt the mode of pressure differential electricity generation can retrieve this department energy, but the change of pressure is invariable, cause equipment rotational speed such as expander that it drove also can not be invariable, therefore the generator needs to adapt to the variable speed variable frequency power generation operating mode, the research and development of variable frequency variable speed generator just can be brought into place.

However, for some generators with complex operating conditions, such as large-scale variable-frequency variable-speed generators, the generators have multiple operating points, the natural frequency of the rotor and the natural frequency of the bearing are required to avoid the operating point frequency, and the natural frequency design of the integrated end cover type sliding bearing adopts either a rigid design with high natural frequency or a flexible design with low natural frequency. Although a seat bearing or a rigid end cover bearing can be used for solving the problem, the two conventional structures increase the weight of the bearing and the whole machine and increase the cost, and meanwhile, the generator shaft system of the seat bearing structure is long, so that the problems limit the manufacturing and application range of the generator. And the flexible design is adopted, so that the requirements of the operation working condition are met, the weight and the manufacturing cost are reduced, the overall layout is more compact, the size of the generator is small, and the applicable environment of the brushless excitation synchronous generator is expanded, so that the brushless excitation synchronous generator has great economic value and practical significance.

SUMMERY OF THE UTILITY MODEL

The utility model discloses not enough to prior art, provide a compact structure, high protection level, vibration low, safe and reliable, simple to operate, maintain simple, variable frequency operation, the wide large-scale box frequency conversion variable speed synchronous brushless excitation generator of operating mode application scope, the technical scheme who takes for solving above-mentioned problem is:

a large box type variable-frequency variable-speed synchronous brushless excitation generator comprises an integrated casing, wherein the lower side of the integrated casing is arranged on a base, a cooler is arranged on the upper side of the integrated casing, an air inlet and an air outlet are formed in the cooler, main junction boxes and neutral point junction boxes are distributed on the front side and the rear side of the integrated casing, and a stator assembly connected to the base is arranged in the integrated casing and is in clearance fit with the integrated casing; the vibration isolation device is characterized by also comprising a rotor assembly which is arranged in the stator assembly in a matching way, wherein two ends of the rotor assembly extend out of the integrated machine shell and are provided with an integrated flexible end cover type sliding bearing in a matching way, the bottom of the integrated flexible end cover type sliding bearing is arranged on the base, and the side part of the integrated flexible end cover type sliding bearing is connected with the integrated machine shell by adopting a vibration isolation mechanism; the wind shields are installed at intervals on the two sides of the axial direction of the rotor along the stator assembly respectively, the axial flow fan is installed at the corresponding positions of the two ends of the rotor assembly and the wind shields, the wind shields are connected with the base and the integrated casing in a sealing mode through a sealing mechanism, a hot air area is formed between the two wind shields inside the integrated casing, the hot air area is communicated with an air inlet on the cooler, a cold air area is formed outside the two wind shields, the cold air area is communicated with an air outlet on the cooler, and the cold air area and the hot air area are communicated through the axial flow fan to form.

Further, the integral type casing includes four risers, and the riser along rotor axial parallel arrangement is the end plate, and the riser along the radial parallel arrangement of rotor is the curb plate, and the welding is connected with oblique pull brace rod between adjacent end plate and the curb plate, is connected with a plurality of location connecting rods and a plurality of firm connecting rod between parallel arrangement's the curb plate top, be equipped with the cooperation groove on the location connecting rod, the location connecting rod is located rotor axial both sides, and firm connecting rod is located between the location connecting rod, four riser bottom outer fringe are connected with the clamp plate of being connected with the base perpendicularly.

Furthermore, an observation hole and an access hole are formed in the side plate.

Further, be equipped with the integral type lug on the end plate, the end plate is seted up and is installed with the cooperation of flexible end cap formula slide bearing of integration mounting groove.

Further, a plurality of reinforcing ribs are arranged between the upper end of the pressing plate and the vertical plate, a sealing groove is formed in the lower end of the pressing plate, and a sealing strip is installed between the sealing groove and the base.

Further, sealing mechanism is including installing the sealing strip between the cooperation groove of deep bead upper end and location connecting rod, be provided with the sealing strip between deep bead lower extreme and the base, it is sealed through sealed clamp plate between deep bead both sides and the curb plate.

Further, the stator assembly and the wind shield are fixed through a stud.

Further, the integrated flexible end cap type sliding bearing comprises a bearing lower half seat and a bearing upper half seat, wherein the bearing upper half seat is mounted on the bearing lower half seat in a buckled mode, the bearing lower half seat and the bearing upper half seat are matched to form a hole type placing part, a bearing bush is coaxially mounted in the hole type placing part, a bearing inner cover and a bearing outer cover are mounted on the front side and the rear side of the bearing bush respectively, a sealing gasket is mounted between the bearing bush and the bearing inner cover, the sealing gasket is mounted between the bearing bush and the bearing outer cover, a resonance-proof supporting seat is connected to the lower end of the bearing lower half seat, a lower connecting mechanism connected with the integrated machine shell in a matched mode is arranged on the resonance-proof supporting seat, an upper connecting mechanism connected with the integrated machine shell in.

Further, the anti-resonance supporting seat comprises a bottom plate, the bottom plate is connected with the lower half seat of the bearing through a supporting vertical plate, a plurality of reinforcing plates are vertically connected to the front side and the rear side of the supporting vertical plate, and the reinforcing plates are respectively connected with the bottom plate and the lower half seat of the bearing.

Further, the lower connecting mechanism comprises vertical clamping grooves arranged on the left side and the right side of the supporting vertical plate, and sealing strips are arranged between the vertical clamping grooves and the corresponding parts of the shell and connected through bolts; go up coupling mechanism and include the arc card portion that the outward flange of bearing upper half seat was equipped with, arc card portion corresponds between the position with the casing and is equipped with the sealing strip and passes through bolted connection.

The utility model discloses the beneficial effect who has does:

1. the utility model relates to a large-scale box type variable frequency variable speed synchronous brushless excitation generator, which utilizes a simple steel plate welding base as a support, adopts a box type structure and a modular assembly design, greatly reduces the installation cost and the manufacturing cost, has good protection effect at the same time, and meets the protection grade requirement of IP 54; through the structural arrangement, the cold partition and the hot air partition are distinguished again, so that the air path does not intersect when the generator operates, and the motor is guaranteed to have a better cooling effect.

2. The utility model discloses an integral type casing and stator module interval set up and replace current casing and stator module integrated design, guarantee that stator module and integral type casing do not have direct contact to avoid stator module directly to transmit the vibration to integral type casing in the course of the work, reached the vibration isolation effect;

3. the utility model discloses an integral type casing, simple structure, the quality is light, and rigidity is good, and the quick processing of being convenient for is convenient for observe the inside operational aspect of motor and is safeguarded through design observation hole and manhole simultaneously, is equipped with the integral type lug on the integral type casing, can hang into the installation with integral type casing is whole through the integral type lug, is applicable to environment such as land, mobile power station.

4. The utility model discloses a flexible integration end cover formula slide bearing compares with traditional seat formula slide bearing, end cover formula slide bearing and integral type end cover formula bearing, has reduced manufacturing cost and holistic weight, makes whole generator overall arrangement compacter simultaneously, and rotor rigidity is big, and the vibration is little, and the bearing frame adopts a plurality of sheet steel welding to accomplish flexible design, the effectual resonance problem of each operating point when having avoided the generator operation, and operating mode application scope is wide.

5. The utility model discloses a vibration isolation mechanism for install the sealing strip between bearing frame and the casing, and through the bolt-up, this kind of elasticity non-positioning bolt connected mode can provide bigger flexible degree of freedom for the bearing, and reduces the exciting force of casing transmission, reaches the corresponding protection level of generator.

Drawings

FIG. 1 is an exploded view of the structure of the present invention;

FIG. 2 is a view of the structure of the present invention;

FIG. 3 is a schematic view of the cooling air path of the present invention;

FIG. 4 is an enlarged view at C of FIG. 3;

FIG. 5 is a left side view of FIG. 3;

FIG. 6 is a schematic view of an integrated housing;

FIG. 7 is an enlarged view of FIG. 6 at D;

FIG. 8 is an exploded view of the flexible integrated end cap type sliding bearing;

FIG. 9 is a drawing showing the assembly of the flexible integrated end cap type sliding bearing with the generator;

fig. 10 is an enlarged view of fig. 9 at a.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-10, a large box-type variable-frequency variable-speed synchronous brushless excitation generator comprises an integrated casing 2, wherein the lower side of the integrated casing 2 is installed on a base 1, a cooler 3 is installed on the upper side of the integrated casing 2, an air inlet and an air outlet are arranged on the cooler 3, main junction boxes 4 and neutral point junction boxes 5 are distributed on the front side and the rear side of the integrated casing 2, and a stator assembly 6 connected to the base 1 is arranged inside the integrated casing 2, so that the stator assembly 6 is in clearance fit with the integrated casing 2, and vibration is prevented from being directly transmitted to the integrated casing 2 in the working process of the stator assembly; the stator assembly 6 comprises a welded box-type stator base, a stator core formed by laminating silicon steel sheets and a coil wound by copper wires, and the stator assembly 6 adopts an independent design to replace the original concept of the integral design of the stator assembly 6 and a shell, so that the weight of the stator assembly is reduced, and the installation and maintenance are convenient; after the stator iron core is separately off-line manufactured, the stator iron core is integrally fastened on the base 1 through bolts, so that the rigidity of the stator iron core is improved, and the vibration of the stator is prevented from being directly transmitted to the integrated shell 2;

the stator assembly 6 is provided with a rotor assembly 7 in a matching manner, the rotor assembly 7 comprises a rotor, the rotor is of a non-salient pole structure processed by adopting integral alloy steel, two ends of the rotor are respectively provided with a suspension type guard ring and an axial flow fan, and a cage-shaped full damping system is formed by a tooth-shaped damping ring under the guard ring, a rotor through long slot wedge and a damping slot wedge at a large tooth part, wherein the suspension type guard ring, the axial flow fan and the full damping system are the prior art and are not described in detail in the embodiment; the two ends of the rotor extend out of the integrated machine shell 2 and are provided with an integrated flexible end cover type sliding bearing 8 in a matching mode, the bottom of the integrated flexible end cover type sliding bearing 8 is arranged on the base 1, the side part of the integrated flexible end cover type sliding bearing 8 is connected with the integrated machine shell 2 through a vibration isolation mechanism, and one end of the rotor assembly 7, which is positioned outside the integrated flexible end cover type sliding bearing 8, is provided with a three-machine brushless excitation device 9;

the wind shields 10 are respectively installed at two sides of the stator assembly 6 along the axial direction of the rotor at intervals, the axial flow fan is installed at the corresponding position of two ends of the rotor assembly 7 and the wind shields 10, the wind shields 10 are provided with wind shielding rings made of glass fiber reinforced plastic materials, wind shielding rings made of cast aluminum materials are coaxially installed in the wind shielding rings, a gap of 2.5mm is formed between the inner circle of each wind shielding ring and the outer circle of the axial flow fan, preferably, the stator assembly 6 and the wind shields 10 are fixed by using double-end studs in the embodiment, the wind shields 10 are respectively connected with the base 1 and the integrated machine shell 2 in a sealing mode through sealing mechanisms, the sealing mechanism comprises a sealing strip arranged between the upper end of the wind deflector 10 and the channel steel reinforcing rib 23, a sealing strip is arranged between the lower end of the wind shield 10 and the base 1, two sides of the wind shield 10 and the side plates 22 are sealed through sealing pressing plates 11, and the sealing strip 12 is a sponge rubber plate; a hot air area is formed between the two wind baffles 10 in the integrated machine shell 2, as shown in B in FIG. 3, the hot air area is communicated with an air inlet on the cooler 3, a cold air area is formed outside the two wind baffles 10, as shown in A in FIG. 3, the cold air area is communicated with an air outlet on the cooler 3, and the cold air area and the hot air area are communicated through an axial fan to form a cooling air path; during operation, cold air in the cooler 3 enters the cold air area from the upper end of the integrated shell 2 through the air outlet, and enters the hot air area through the axial flow fan through the cold air area, and hot air in the hot air area enters the cooler 3 from the upper end of the integrated shell 2 through the air inlet, so that cold and hot air paths in the operation of the motor are not crossed, the conversion of cold and hot air can be better realized, and the better cooling effect of the motor is ensured.

As shown in fig. 1-10, in order to facilitate the processing of the casing, and the casing has light weight and is not deformed, the integrated casing 2 includes four vertical plates, the vertical plate parallel to the axial direction of the rotor is an end plate 21, the vertical plate 813 parallel to the radial direction of the rotor is a side plate 22, a diagonal bracing rib 25 is welded and connected between the adjacent end plate 21 and the side plate 22, a plurality of positioning connecting rods and a plurality of stabilizing connecting rods are connected between the tops of the parallel side plates 22, the positioning connecting rods are provided with matching grooves, the positioning connecting rods are located at two sides of the axial direction of the rotor, and the stabilizing connecting rods are located between the positioning connecting rods, in this embodiment, the preferred positioning connecting rods are channel steel reinforcing ribs 23, and the; the pressing plates 27 connected with the base 1 are perpendicularly welded on the outer edges of the bottoms of the four vertical plates, the pressing plates 27 are convenient for the integrated casing 2 to be connected with the base 1, and the casing designed in the way is simple in structure, light in weight, good in rigidity and convenient to rapidly process.

As shown in fig. 1-10, in order to facilitate observation of the internal operation of the motor and maintenance, the side plate 22 is provided with an observation hole 29 and a service hole 28.

As shown in fig. 1 to 10, in this embodiment, in order to facilitate the installation and the detachment of the integrated casing 2, the end plate 21 is provided with an integrated lifting lug 26, the integrated casing 2 can be integrally lifted and installed by the integrated lifting lug 26, and the end plate 21 is provided with an installation groove which is installed in cooperation with the integrated flexible end-cap type sliding bearing 8.

As shown in fig. 1-10, in order to satisfy the requirement of IP54 protection level, and guarantee the isolation design and protection tight at the same time, and the appearance is neat, a plurality of reinforcing ribs are provided between the upper end of the pressing plate 27 and the vertical plate, so as to stabilize the installation of the vertical plate and the pressing plate 27, a sealing groove 271 is provided at the lower end of the pressing plate 27, a sealing strip 12 is installed between the sealing groove 271 and the base 1, in this embodiment, the sealing strip 12 is a sponge rubber plate, the installation of the sealing strip 12 guarantees the tight protection of the integrated casing 2 and the base 1, and the vibration transmission on the base 1 to the integrated casing 2 can be reduced, so as to achieve the isolation design, thereby also.

As shown in fig. 1-10, in order to effectively avoid the resonance problem at each operating point when the generator operates, the working condition application range is wide, and at the same time, the bearing designed in this way can reduce the manufacturing cost and the overall weight, and make the layout of the whole generator more compact, the integrated flexible end cap type sliding bearing 8 includes a bearing lower half seat 87 and a bearing upper half seat 85 which is snap-fitted on the bearing lower half seat 87, the bearing lower half seat 87 and the bearing upper half seat 85 cooperate to form a hole type placing portion, a bearing 84 is coaxially installed in the hole type placing portion, a bearing inner cap 82 and a bearing outer cap 86 are respectively installed on the front and rear sides of the bearing 84, a sealing gasket 83 is installed between the bearing 84 and the bearing inner cap 82, a sealing gasket 83 is installed between the bearing 84 and the bearing outer cap 86, the lower end of the bearing lower half seat 87 is connected with an anti-resonance supporting seat 81, a lower connecting, the upper bearing half seat 85 is provided with an upper connecting mechanism which is connected with the integrated machine shell 2 in a matching way, and the lower connecting mechanism and the upper connecting mechanism form a vibration isolation mechanism.

As shown in fig. 1 to 10, in order to solve the problem of resonance at each operating point when the generator operates, the anti-resonance supporting seat 81 includes a bottom plate 811, the bottom plate 811 is connected to the lower bearing half seat 87 through a supporting vertical plate 813, the front and rear sides of the supporting vertical plate 813 are vertically connected to a plurality of reinforcing plates 812, the reinforcing plates 812 are respectively connected to the bottom plate 811 and the lower bearing half seat 87, and the preferred connection mode is selected by welding. In this embodiment, the reinforcing plate 812, the bottom plate 811 and the vertical plate 813 are made of steel plates, the bearing lower half seat 87 and the bearing upper half seat 85 are made of steel plates by welding, and the preferred thickness of the steel plates is 5-25 mm; when the motor starts to work, the motor runs in a load mode at working points with the rotating speed of 1600r/min, 1890r/min, 2150r/min, 2580r/min, 2750r/min, 3010r/min, 3150r/min, 3270r/min and the like, and the vibration frequency of the corresponding working point is 26.67Hz,31.50Hz,35.83Hz,43.00Hz, 45.83 Hz,50.17Hz,52.50Hz and 54.50Hz, so that the first-order natural frequency of the bearing is 18Hz and is lower than the vibration frequency under the working point condition by adopting the design of steel plate connection, the resonance problem of each working point during the running of the generator is effectively avoided, and the vibration value of the majority of the shafts is controlled to be lower than 20 mu m, and the individual point is lower than 45 mu m and lower than the requirement of national standard 80 mu m.

As shown in fig. 1-10, in order to achieve a sealing effect and achieve a corresponding protection level of the generator, and meanwhile, the installation design provides a greater flexible degree of freedom for the bearing and reduces an excitation force transmitted by the casing, the vibration isolation mechanism includes a lower connecting mechanism and an upper connecting mechanism, the lower connecting mechanism includes vertical slots 814 arranged on the left and right sides of a supporting vertical plate 813, and sealing strips 12 are arranged between the vertical slots 814 and corresponding parts of the integrated casing 2 and connected through bolts; go up coupling mechanism and include the arc card portion that the outward flange of bearing first seat 85 was equipped with, arc card portion corresponds and is equipped with sealing strip 12 and pass through bolted connection between the position with the casing, in this embodiment, sealing strip 12 is rubber sealing strip, and flexible integration end cover formula sliding bearing does not have too high requirement to tang processing, only needs to guarantee that the fitting surface is level and smooth, the edge neat and artistic can, have great adjustment volume, utilize small dimension bolt to carry out the fastening during the assembly and decide, add the rubber sealing strip of suitable specification according to the gap size between the faying face of the two to play sealed effect.

The utility model discloses a working process does:

when the motor starts to work, the motor runs with load at working points with the rotating speed of 1600r/min, 1890r/min, 2150r/min, 2580r/min, 2750r/min, 3010r/min, 3150r/min, 3270r/min and the like, the vibration frequency of the corresponding working point is 26.67Hz,31.50Hz,35.83Hz,43.00Hz, 45.83 Hz,50.17Hz,52.50Hz and 54.50Hz, the rotor rotates relative to the stator to generate electricity, at the moment, the cooler 3 enables cold air to enter a cold air area through an air outlet through the upper side of the integrated machine shell 2, the cold air enters the cold air area through an axial flow fan, the hot air in the hot air area enters the cooler 3 through an air inlet through the upper side of the machine shell 2, so that the replacement of the cold air and the hot air can be realized, and heat generated in the motor can be taken out to ensure that the motor has a better cooling effect. Meanwhile, in the working process, the integrated machine shell 2 and the stator assembly 6 are installed at intervals, the exciting force generated by the stator assembly 6 in the working process is not directly transmitted to the integrated machine shell 2, the vibration isolation effect is achieved, meanwhile, the installation of the integrated flexible end cover type sliding bearing 8 plays a sealing role through the vibration isolation mechanism, the corresponding protection grade of the generator is achieved, meanwhile, the installation design provides a larger flexible degree of freedom for the bearing, the exciting force transmitted by the machine shell is reduced, and the vibration isolation effect is achieved; in addition, the bearing seat is formed by welding a plurality of thin steel plates, so that the first-order natural frequency of the bearing is 18Hz and is lower than the vibration frequency under the condition of working points, and the resonance problem of each working point when the generator runs is effectively avoided.

The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any form, and all of the technical matters of the present invention belong to the protection scope of the present invention to any simple modification, equivalent change and modification made by the above embodiments.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the use of "first" and "second" is merely for convenience in describing the invention and to simplify the description, and the words are not intended to have a special meaning unless otherwise stated.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments, but such modifications or substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A large box type variable-frequency variable-speed synchronous brushless excitation generator is characterized by comprising an integrated casing, wherein the lower side of the integrated casing is arranged on a base, a cooler is arranged on the upper side of the integrated casing, an air inlet and an air outlet are formed in the cooler, main junction boxes and neutral point junction boxes are distributed on the front side and the rear side of the integrated casing, and a stator assembly connected to the base is arranged in the integrated casing and is in clearance fit with the integrated casing;

the integrated flexible end cover type sliding bearing is characterized by also comprising a rotor component which is arranged in the stator component in a matching way, two ends of the rotor component extend out of the integrated machine shell and are provided with an integrated flexible end cover type sliding bearing in a matching way, the bottom of the integrated flexible end cover type sliding bearing is arranged on the base, the side part of the integrated flexible end cover type sliding bearing is connected with the integrated machine shell by adopting a vibration isolation mechanism,

the wind shields are installed at intervals on the two sides of the axial direction of the rotor along the stator assembly respectively, the axial flow fan is installed at the corresponding positions of the two ends of the rotor assembly and the wind shields, the wind shields are connected with the base and the integrated casing in a sealing mode through a sealing mechanism, a hot air area is formed between the two wind shields inside the integrated casing, the hot air area is communicated with an air inlet on the cooler, a cold air area is formed outside the two wind shields, the cold air area is communicated with an air outlet on the cooler, and the cold air area and the hot air area are communicated through the axial flow fan to form.

2. The large box-type variable-frequency variable-speed synchronous brushless excitation generator according to claim 1, wherein the integrated housing comprises four vertical plates, the vertical plates arranged in parallel along the axial direction of the rotor are end plates, the vertical plates arranged in parallel along the radial direction of the rotor are side plates, diagonal bracing bars are welded and connected between adjacent end plates and side plates, a plurality of positioning connecting rods and a plurality of stabilizing connecting rods are connected between the tops of the side plates arranged in parallel, the positioning connecting rods are provided with matching grooves, the positioning connecting rods are positioned at two sides in the axial direction of the rotor, the stabilizing connecting rods are positioned between the positioning connecting rods, and the outer edges of the bottoms of the four vertical plates are vertically connected with a pressing plate connected with.

3. The large box-type variable-frequency variable-speed synchronous brushless excitation generator as claimed in claim 2, wherein the side plate is provided with an observation hole and an access hole.

4. The large box-type variable-frequency variable-speed synchronous brushless excitation generator as claimed in claim 3, wherein the end plate is provided with an integrated lifting lug, and the end plate is provided with a mounting groove matched with the integrated flexible end cover type sliding bearing.

5. The large box-type variable-frequency variable-speed synchronous brushless excitation generator as claimed in claim 4, wherein a plurality of reinforcing ribs are arranged between the upper end of the pressing plate and the vertical plate, a sealing groove is formed at the lower end of the pressing plate, and a sealing strip is arranged between the sealing groove and the base.

6. The large box-type variable-frequency variable-speed synchronous brushless excitation generator according to claim 5, wherein the sealing mechanism comprises a sealing strip installed between the upper end of the wind shield and a matching groove of the positioning connecting rod, the sealing strip is arranged between the lower end of the wind shield and the base, and two sides of the wind shield are sealed with the side plates through sealing pressing plates.

7. The large box-type variable-frequency variable-speed synchronous brushless excitation generator according to claim 6, wherein the stator assembly and the wind shield are fixed by a stud.

8. A large box-type variable-frequency variable-speed synchronous brushless excitation generator according to claim 7, it is characterized in that the integrated flexible end cover type sliding bearing comprises a bearing lower half seat and a bearing upper half seat buckled on the bearing lower half seat, the bearing lower half seat and the bearing upper half seat are matched to form a hole type placing part, a bearing bush is coaxially arranged in the hole-shaped placing part, a bearing inner cover and a bearing outer cover are respectively arranged at the front side and the rear side of the bearing bush, a sealing gasket is arranged between the bearing bush and the bearing inner cover, a sealing gasket is arranged between the bearing bush and the bearing outer cover, the lower end of the lower half seat of the bearing is connected with an anti-resonance supporting seat, the anti-resonance supporting seat is provided with a lower connecting mechanism which is connected with the integrated machine shell in a matched mode, the upper bearing seat is provided with an upper connecting mechanism which is connected with the integrated machine shell in a matched mode, and the lower connecting mechanism and the upper connecting mechanism form a vibration isolation mechanism.

9. The large box-type variable-frequency variable-speed synchronous brushless excitation generator according to claim 8, wherein the anti-resonance supporting seat comprises a bottom plate, the bottom plate is connected with the lower half bearing seat through a supporting vertical plate, the front side and the rear side of the supporting vertical plate are vertically connected with a plurality of reinforcing plates, and the reinforcing plates are respectively connected with the bottom plate and the lower half bearing seat.

10. The large box-type variable-frequency variable-speed synchronous brushless excitation generator according to claim 9, wherein the lower connection mechanism comprises vertical slots provided on left and right sides of the supporting vertical plate, and sealing strips are provided between the vertical slots and corresponding parts of the housing and connected by bolts; go up coupling mechanism and include the arc card portion that the outward flange of bearing upper half seat was equipped with, arc card portion corresponds between the position with the casing and is equipped with the sealing strip and passes through bolted connection.

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