CN210225110U

CN210225110U - External excitation motor mounting structure

Info

Publication number: CN210225110U
Application number: CN201921456633.8U
Authority: CN
Inventors: Yanqing Qu; 曲延庆; Gele Ku; 库格勒
Original assignee: Wuxi Byrne Motor Co Ltd
Current assignee: Wuxi Byrne Motor Co Ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-03-31
Anticipated expiration: 2029-09-03

Abstract

The utility model relates to an excitation motor mounting structure, specific external excitation motor mounting structure that says so belongs to excitation motor mounting structure technical field. The excitation motor outer housing comprises a cylinder, a front end cover, a rear end cover and a flow guide ring, wherein the front end and the rear end of the cylinder are respectively welded with a front mounting ring and a rear mounting ring, the front mounting ring is in threaded connection with the front end cover, and the rear mounting ring is in threaded connection with the rear end cover; a plurality of cylinder strengthening ribs are welded on the outer surface of the cylinder, and a diversion ring is welded on the outer ring of the plurality of cylinder strengthening ribs. The utility model is arranged outside the generator, which shortens the bearing space of the generator, avoids the lengthening of the shaft and ensures the strength requirement of the shaft; the reinforcing ribs on the cylinder body increase the stability of the excitation motor; the split structure of the shell and the bracket is convenient for the excitation stator to be concentric with the rotor.

Description

External excitation motor mounting structure

Technical Field

The utility model relates to an excitation motor mounting structure, specific external excitation motor mounting structure that says so belongs to excitation motor mounting structure technical field.

Background

The dual bearing generator rotor provided for the gas turbine generator set is characterized by a high rotational speed and will typically operate at a rotational speed between the first and second threshold rotational speeds of the generator rotor. In order to realize high rotating speed of the rotor of the generator, the generator is generally designed to be slender, namely the length of the rotor is far greater than the diameter of a rotor iron core, and the bearing distance on the rotor is also far greater than that of the rotor with the same iron core length, so that the design is convenient for the rotor to pass through a first critical rotating speed at a lower rotating speed, and the vibration amplitude of the rotor when the rotor passes through the critical rotating speed is reduced. However, the length of the rotor cannot be increased at once, when the rotor is lengthened and the distance between the bearings is increased, the rotor reaches the working rotating speed after the second critical rotating speed is exceeded, and at the moment, the rotor has larger resonance due to high rotating speed and high energy, so that the rotor or the bearings are damaged. In order to meet the working requirement, a main shaft of the generator can be designed to be thick, the thick main shaft on a medium-large motor consumes materials, and higher load can be caused on a prime motor.

Disclosure of Invention

The utility model aims to overcome the defects, thereby providing an external excitation motor mounting structure, arranging the excitation motor outside the generator near the non-driving end, reducing the distance between two bearings on the rotor of the generator, increasing the stability of the rotor under the condition of unchanged shaft diameter, effectively improving the critical rotating speed of the rotor and reducing the cost; and because the excitation motor is external, the main body structure of the generator can be more compact.

According to the technical scheme provided by the utility model, an external excitation motor mounting structure is including the excitation motor outer housing that is used for protecting excitation motor and the motor support frame that is used for supporting excitation motor, characterized by: the excitation motor outer housing comprises a cylinder body, a front end cover, a rear end cover and a flow guide ring, wherein the front end and the rear end of the cylinder body are respectively welded with a front mounting ring and a rear mounting ring, the front end cover is screwed on the front mounting ring, and the rear end cover is screwed on the rear mounting ring; a plurality of cylinder reinforcing ribs are welded on the outer surface of the cylinder, a flow guide ring is welded on the outer ring of the plurality of cylinder reinforcing ribs together, the front ends of the plurality of cylinder reinforcing ribs are welded with the front mounting ring, and the front ends and the rear ends of the plurality of cylinder reinforcing ribs are detachably connected with the rear end cover through connecting pieces;

the motor support frame comprises two main support plates which are arranged in bilateral symmetry, a plurality of cross beams are welded between the two main support plates, the front ends of the main support plates are welded with mounting plates, the mounting plates and the main support plates are arranged vertically, bolt holes are arranged on the mounting plates, and the mounting plates are connected to the outer shell of the motor through bolts; the upper ends of the two main supporting plates are welded with a lower supporting plate together, the upper ends of the lower supporting plates are connected with an upper supporting plate through bolts, and a plurality of gaskets are arranged between the upper supporting plate and the lower supporting plate; the left side and the right side of the front portion and the rear portion of the cylinder of the excitation motor outer housing are respectively welded with support legs, and the support legs are detachably connected with a lower support plate of the motor support frame through connecting pieces.

Furthermore, an air filter screen is arranged on the front end cover, a cooling fan is arranged on the inner side of the air filter screen, and the cooling fan is arranged on a main shaft of the excitation motor and rotates along with the main shaft.

Furthermore, two operation windows are symmetrically arranged on the left side and the right side of the flow guide ring and are connected to the flow guide ring through bolts.

Furthermore, a positioning ring is welded in the inner cavity of the cylinder body, and the excitation motor is positioned and installed in the cylinder body through the positioning ring.

Furthermore, a plurality of barrel strengthening ribs are evenly distributed along the barrel circumferencial direction.

Further, the front part, the middle part and the rear part of the side surface of the main supporting plate are respectively welded with a first reinforcing plate, a second reinforcing plate and a third reinforcing plate.

Compared with the prior art, the utility model has the advantages that:

the utility model discloses a motor support frame is symmetrical structure, makes its atress more even, places excitation motor outer housing on it, and excitation motor outer housing also adopts symmetrical structure, sets up the strengthening rib on the barrel simultaneously, has guaranteed the structural strength of excitation motor outer housing, forms good support and protection to the excitation motor; the utility model is arranged outside the generator, compared with the structure that the existing exciter is arranged on the shaft and is positioned inside the stator shell and close to the non-driving end bearing, the distance between the bearings of the generator is shortened, the shaft is prevented from being lengthened, and the strength requirement of the shaft is ensured; the reinforcing ribs on the cylinder body increase the stability of the excitation motor; the split structure of the shell and the bracket is convenient for the excitation stator to be concentric with the rotor.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is a top view of the present invention.

Fig. 4 is a sectional view taken along line a-a of fig. 1.

Description of reference numerals: 1-cylinder, 2-front end cover, 3-rear end cover, 4-front mounting ring, 5-rear mounting ring, 6-guide ring, 7-cylinder reinforcing rib, 8-positioning ring, 9-air filter screen, 10-operation window, 11-supporting leg, 12-upper supporting plate, 13-lower supporting plate, 14-gasket, 15-main supporting plate, 16-mounting plate, 17-first reinforcing plate, 18-second reinforcing plate, 19-third reinforcing plate, 20-cross beam and 21-cooling fan.

Detailed Description

The invention will be further described with reference to the embodiments shown in the drawings to which:

as shown in fig. 1-4, the utility model discloses mainly including the excitation motor housing that is used for protecting excitation motor and the motor support frame that is used for supporting excitation motor.

The excitation motor outer casing comprises a cylinder body 1, a front end cover 2, a rear end cover 3 and a flow guide ring 6, wherein the front end and the rear end of the cylinder body 1 are respectively welded with a front mounting ring 4 and a rear mounting ring 5, the front end cover 2 is in threaded connection with the front mounting ring 4, and the rear end cover 3 is in threaded connection with the rear mounting ring 5.

Be equipped with airstrainer 9 on front end housing 2, airstrainer 9 inboard is equipped with cooling fan 21, and cooling fan sets up and rotates along with the main shaft on excitation motor's main shaft, and excitation motor drives cooling fan 21 and rotates during the work, and outside air gets into barrel 1 through airstrainer 9 and takes away the heat, and hot-blast outflow from the interior of water conservancy diversion ring 6 at last.

A plurality of barrel strengthening ribs 7 are welded on the outer surface of the barrel body 1, the plurality of barrel strengthening ribs 7 are evenly distributed along the circumferential direction of the barrel body 1, and the outer rings of the plurality of barrel strengthening ribs 7 are welded with the flow guide ring 6 together. The front ends of the plurality of cylinder reinforcing ribs 7 are welded with the front mounting ring 4, and the front ends and the rear ends of the plurality of cylinder reinforcing ribs 7 are detachably connected with the rear end cover 3 through connecting pieces.

The left side and the right side of the guide ring 6 are symmetrically provided with two operation windows 10, the operation windows 10 are connected to the guide ring 6 through bolts, and the operation windows are arranged so that maintenance of internal parts can be still performed under the condition that the whole external excitation motor cover is not detached.

A positioning ring 8 is welded in the inner cavity of the cylinder body 1, and the excitation motor is positioned and installed in the cylinder body 1 through the positioning ring 8.

The motor support frame includes two main tributary faggings 15 that bilateral symmetry set up, welds a plurality of crossbeams 20 between two main tributary faggings 15, main tributary fagging 15 front end welding mounting panel 16, mounting panel 16 and main tributary fagging 15 mutually perpendicular set up, are equipped with the bolt hole on the mounting panel 16, and mounting panel 16 passes through bolted connection on the outside casing of outer motor.

The front, middle and rear parts of the side surfaces of the main supporting plate 15 are respectively welded with a first reinforcing plate 17, a second reinforcing plate 18 and a third reinforcing plate 19, and the structural strength of the main supporting plate 15 is improved by the first reinforcing plate 17, the second reinforcing plate 18 and the third reinforcing plate 19.

The upper ends of the two main supporting plates 15 are welded with a lower supporting plate 13 together, the upper end of the lower supporting plate 13 is connected with an upper supporting plate 12 through a bolt, and a plurality of gaskets 14 are arranged between the upper supporting plate 12 and the lower supporting plate 13.

The left side and the right side of the front part and the rear part of the cylinder body 1 of the excitation motor outer housing are respectively welded with support legs 11, and the support legs 11 are detachably connected with a lower supporting plate 13 of a motor supporting frame through connecting pieces.

The utility model discloses a motor support frame is symmetrical structure, makes its atress more even, places the excitation motor housing on it, and the excitation motor housing also adopts symmetrical structure, sets up the strengthening rib simultaneously on the barrel, has guaranteed the structural strength of excitation motor housing, forms good support and protection to excitation motor. The utility model discloses the setting is outside at the generator, installs with existing exciter and compares at the epaxial structure that is close to non-drive end bearing department in stator housing inside, has subtracted the generator bearing interval of having shortened, has avoided the extension of axle, has guaranteed the intensity requirement of axle.

Claims

1. The utility model provides an external excitation motor mounting structure, is including the excitation motor encloser that is used for protecting excitation motor and the motor support frame that is used for supporting excitation motor, characterized by: the excitation motor outer housing comprises a cylinder body (1), a front end cover (2), a rear end cover (3) and a flow guide ring (6), wherein the front end and the rear end of the cylinder body (1) are respectively welded with a front mounting ring (4) and a rear mounting ring (5), the front end cover (2) is screwed on the front mounting ring (4), and the rear end cover (3) is screwed on the rear mounting ring (5); a plurality of cylinder reinforcing ribs (7) are welded on the outer surface of the cylinder body (1), a flow guide ring (6) is welded on the outer ring of the plurality of cylinder reinforcing ribs (7) together, the front ends of the plurality of cylinder reinforcing ribs (7) are welded with the front mounting ring (4), and the front ends and the rear ends of the plurality of cylinder reinforcing ribs (7) are detachably connected with the rear end cover (3) through connecting pieces;

the motor support frame comprises two main support plates (15) which are arranged in bilateral symmetry, a plurality of cross beams (20) are welded between the two main support plates (15), a mounting plate (16) is welded at the front end of each main support plate (15), the mounting plate (16) and the main support plates (15) are arranged vertically, bolt holes are formed in the mounting plate (16), and the mounting plate (16) is connected to an outer shell of the motor through bolts; the upper ends of the two main supporting plates (15) are welded with a lower supporting plate (13) together, the upper end of the lower supporting plate (13) is connected with an upper supporting plate (12) through a bolt, and a plurality of gaskets (14) are arranged between the upper supporting plate (12) and the lower supporting plate (13); the left and right sides of the front and back parts of the cylinder body (1) of the excitation motor outer housing are respectively welded with support legs (11), and the support legs (11) are detachably connected with a lower support plate (13) of the motor support frame through connecting pieces.

2. The external excitation motor mounting structure of claim 1, wherein: an air filter screen (9) is arranged on the front end cover (2), a cooling fan (21) is arranged on the inner side of the air filter screen (9), and the cooling fan (21) is arranged on a main shaft of the excitation motor and rotates along with the main shaft.

3. The external excitation motor mounting structure of claim 1, wherein: the left side and the right side of the flow guide ring (6) are symmetrically provided with two operation windows (10), and the operation windows (10) are connected to the flow guide ring (6) through bolts.

4. The external excitation motor mounting structure of claim 1, wherein: a positioning ring (8) is welded in the inner cavity of the cylinder body (1), and the excitation motor is positioned and installed in the cylinder body (1) through the positioning ring (8).

5. The external excitation motor mounting structure of claim 1, wherein: the plurality of cylinder reinforcing ribs (7) are uniformly distributed along the circumferential direction of the cylinder (1).

6. The external excitation motor mounting structure of claim 1, wherein: the front part, the middle part and the rear part of the side surface of the main supporting plate (15) are respectively welded with a first reinforcing plate (17), a second reinforcing plate (18) and a third reinforcing plate (19).