Three-phase brushless synchronous generator

Abstract

The utility model belongs to the technical field of three-phase brushless synchronous generators, and particularly relates to a three-phase brushless synchronous generator. A motor shell is fixed on the base, a stator is installed on the inner side wall of the motor shell, a rotating shaft is arranged in the motor shell, a rotor is installed on the rotating shaft, an excitation armature is installed on the rotating shaft on the right side of the stator, a rotating rectifier is installed on the rotating shaft, and excitation magnetic poles are installed on the inner wall of the motor shell. A supporting plate is arranged between the rotor and the rotary rectifier, end covers are installed at the left end and the right end of the motor shell, the left end is a front end cover, and the right end is a rear end cover. Circular grooves are formed in the left end of the front end cover, the right end of the supporting plate and the left end of the rear end cover, filter plates are in threaded connection with the interiors of the circular grooves, and through grooves are formed in the filter plates; and a turning cover is arranged on the motor shell. When the turning cover is opened, the filter plate in the motor shell and the damageable device on the rotary rectifier can be conveniently replaced, the filter plate can be taken down from the rotary shaft through the through groove, and cleaning, maintenance and replacement are convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to three phase brushless synchronous generator technical field, especially, it is three phase brushless synchronous generator. BACKGROUND

[0002] Three phase brushless synchronous generator is a kind of high-efficiency power generation equipment, its main feature is no sliding contact part, thus has high reliability and low maintenance requirement.Three phase brushless synchronous generator is widely used in fixed or mobile power station, ship and industrial automation etc. with its high efficiency, reliable and easy maintenance characteristics.

[0003] Three phase brushless synchronous generator is mainly composed of two parts: main generator, rotating rectifier and exciter.The exciter provides excitation current on the stator, and the main generator generates alternating current on the rotor;The alternating current generated by the main generator is converted into direct current by the rotating rectifier, and then supplied to the exciter to form a closed loop system.The silicon rectifier element of rotating rectifier is easy to be damaged due to overvoltage, overcurrent and excessive torque during installation during use.In addition, if the silicon element in the rotating rectifier is damaged, it will cause short circuit of the circuit and affect the normal operation of the generator.These fault phenomena show that the rotating rectifier is easy to be damaged in actual application, and it is a vulnerable part;But the rotating rectifier is usually placed between the rotor core and the exciter rotor core in the motor base, and this structure makes its maintenance and replacement complex.In order to prevent overheating, improve efficiency, prolong service life and prevent magnetic steel demagnetization, heat dissipation is needed to ensure the efficient, reliable and long-life operation of the motor.In order to ensure that the air entering the motor is cleaner, so as to improve the heat dissipation efficiency, the filter screen can be added to improve the heat dissipation effect.But in actual use, the filter screen is not convenient to remove, which causes inconvenience in maintenance and cleaning. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of three phase brushless synchronous generator, it is convenient to clean, maintenance and replacement filter plate.

[0005] The three-phase brushless synchronous generator comprises a base, a hollow column-shaped motor shell fixed transversely on the base, the motor shell being arranged in a left-right through manner, a cylindrical stator mounted on the inner side wall of the motor shell, a rotating shaft independently arranged transversely in the motor shell on the inner side of the stator and penetrating through the left and right ends of the motor shell, a rotor mounted on the rotating shaft on the inner side of the stator and matched with the stator, an excitation armature mounted on the rotating shaft on the right side of the stator, a rotating rectifier mounted on the rotating shaft between the stator and the excitation armature, an excitation magnetic pole mounted on the inner wall of the motor shell on the outer side of the excitation armature, a support plate in a hub structure arranged between the rotor and the rotating rectifier, end covers in a hub structure mounted on the left and right ends of the motor shell, the end cover mounted on the left end of the motor shell being a front end cover, the end cover mounted on the right end of the motor shell being a rear end cover, and the support plate and the end covers being mounted on the rotating shaft through bearings.

[0006] The left end of the front end cover, the right end of the support plate and the left end of the rear end cover are all provided with circular grooves, the inner side walls of the circular grooves are provided with internal threads, the circular grooves are connected with filter plates in a circular ring structure through the internal threads, the outer side walls of the filter plates are provided with external threads, and the filter plates are all provided with through grooves with a width greater than the diameter of the rotating shaft and communicating between the inner side and the outer side.

[0007] The motor shell between the support plate and the rear end cover is provided with a flip cover capable of being flipped in the front and back directions.

[0008] The flip cover is opened to facilitate replacement of the filter plates in the motor shell and the vulnerable devices on the rotating rectifier, the filter plates screwed with the front end cover, the support plate and the rear end cover can be disconnected by rotation, and then taken off from the rotating shaft through the through grooves, without the need to take off all other components from the rotating shaft one by one at both ends, and then take off the filter plates in the motor shell or on the rotating shaft, facilitating cleaning, maintenance and replacement, and without the need to take off the excitation armature and other components from the end of the rotating shaft one by one, and then take off the rotating rectifier, facilitating maintenance and replacement of the vulnerable parts on the rotating rectifier, and reducing the workload.

[0009] Further, a sleeve is mounted on the filter plate.

[0010] When the filter plate is inconvenient to rotate, the sleeve on the filter plate can be used to rotate with a tool, which is very convenient.

[0011] Further, a plurality of first threaded holes are transversely arranged on the left side wall of the motor shell and uniformly distributed along the circumference, a counterbore is arranged on the front end cover and communicates between the left and right sides, and a screw is independently arranged in the counterbore and screwed with the first threaded hole.

[0012] The screw is stable in connection.

[0013] Further, the flip cover is a semicircular arc plate.

[0014] The half-arc-shaped flip cover is opened to enlarge the interior space and facilitate the interior operation.

[0015] Further, the flip cover is located at the top of the motor shell, the rear end of the flip cover is hinged to the motor shell, the front end of the flip cover is fixed with a first connecting block, the first connecting block is connected with a second connecting block, and the second connecting block is fixed on the motor shell.

[0016] The rear end of the flip cover is hinged to the motor shell, and the front end is connected through bolts, so that the flip cover can be conveniently opened and closed.

[0017] Further, a fan is installed on the rotating shaft on the right side of the rear end cover, and a fan rear cover is installed on the right end of the rear end cover.

[0018] Further, a plurality of second threaded holes are horizontally arranged on the right side wall of the rear end cover and are uniformly distributed along the circumference, and a through hole is arranged on the fan rear cover and communicates with the left and right sides.

[0019] The fan rear cover can be fixed on the rear end cover through the through hole and the second threaded hole by using a fastening connecting piece such as a screw or a screw rod.

[0020] Further, a belt pulley is installed on the rotating shaft on the left side of the front end cover.

[0021] The belt pulley is convenient to connect with other mechanisms.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The flip cover is opened, the filter plate in the motor shell and the vulnerable device on the rotating rectifier can be conveniently replaced, the filter plate which is threadedly connected with the front end cover, the supporting plate and the rear end cover can be disconnected through rotation, and then the filter plate can be taken off from the rotating shaft through the through slot, so that the filter plate in the motor shell or on the rotating shaft can be taken off without taking other components at both ends from the rotating shaft one by one, then the filter plate can be taken off, the cleaning, maintenance and replacement are convenient, the vulnerable device on the rotating rectifier is maintained and replaced conveniently, and the work amount is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a front view structural schematic diagram of a three-phase brushless synchronous generator;

[0025] Figure 2 It is Figure 1 a top view structural schematic diagram;

[0026] Figure 3 It is Figure 1 a left view structural schematic diagram;

[0027] Figure 4 It isFigure 1 Schematic diagram of the right view structure;

[0028] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure along line AA;

[0029] Figure 6 for Figure 1 Schematic diagram of the cross-sectional structure along line BB;

[0030] Figure 7 for Figure 1 Schematic diagram of the cross-sectional structure along the CC line;

[0031] Figure 8 for Figure 1 Schematic diagram of the three-dimensional structure;

[0032] Figure 9 for Figure 8 Schematic diagram of the structure after partial section of the middle parts;

[0033] Figure 10 for Figure 8 Schematic diagram of the exploded structure after reduction.

[0034] The names of the components in the figure are: 1. Pulley; 2. Bearing; 3. Front cover; 4. Screw; 5. First threaded hole; 6. Motor housing; 7. Stator; 8. Rotor; 9. Support plate; 10. Flip cover; 11. Rotating rectifier; 12. Excitation pole; 13. Excitation armature; 14. Rear cover; 15. Fan; 16. Fan rear cover; 17. Second threaded hole; 18. Base; 19. Filter plate; 20. Rotating shaft; 21. First connecting block; 22. Second connecting block. DETAILED DESCRIPTION

[0035] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings, but this does not limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0036] Example

[0037] This embodiment uses the following materials:

[0038] 1. Prepare one pulley 1, one fan 15 and one fan rear cover 16;

[0039] 2. Prepare three bearings 2;

[0040] 3. Prepare screws 4 and several bolts;

[0041] 4. Prepare a set of stator 7 and rotor 8 with coils;

[0042] 5, prepare a rotating rectifier 11;

[0043] 6, prepare a set of field magnet 12 and field armature 13;

[0044] 7, prepare a rotating shaft 20;

[0045] 8, prepare a number of materials with high strength and good thermal conductivity, such as cast iron, cast aluminum alloy, steel (steel pipe) or steel plate, for making motor shell 6, front cover 3, support plate 9, rear cover 14 and filter plate 19;

[0046] 9, prepare a motor base 18.

[0047] The above materials are assembled as follows:

[0048] Step 1: make

[0049] Make a motor shell 6; as shown in Figure 1 、 Figure 2 and Figure 10 , the main body of the motor shell 6 is a hollow cylindrical shell, both ends are open; as shown in Figure 1 , a horizontal first threaded hole 5 is machined on the left side wall of the motor shell 6, as shown in Figure 3 , the first threaded hole 5 is 4, which is distributed at equal intervals in the circle;

[0050] As shown in Figure 1 , a circular hole with a diameter larger than the inner diameter of the motor shell 6 is opened at the right end of the motor shell 6, and the diameter of the circular hole should be able to meet the installation space of the rotating rectifier 11 and the field magnet 12; as shown in Figure 1 、 Figure 7 and Figure 8 , the upper half of the circular hole is cut to form a flap 10 on the side wall of the motor shell 6;

[0051] As shown in Figure 4 and Figure 7 , the flap 10 and the right end of the motor shell 6 are hinged through the pivot, the left end of the flap 10 is fixed with the first connecting block 21, and the corresponding position of the first connecting block 21 on the motor shell 6 is fixed with the second connecting block 22; the first connecting block 21 and the second connecting block 22 are connected by bolts, and actually they can also be connected by butterfly bolts according to the use requirements.

[0052] Make a front cover 3; as shown in Figure 5 , the main body of the front cover 3 is a hub structure, as shown in Figure 5 , four fan-shaped hollows are arranged at equal intervals in the circle on the front surface of the front cover 3.

[0053] A step hole is machined on the front cover 3 at the connection with the left end of the motor shell 6, which is a counterbore, and the position corresponds to that of the first threaded hole 5; asFigure 1 As shown, an annular groove is provided at the left end of the front end cover 3 , and an internal thread is processed on the inner wall of the annular groove; the inner side of the front end cover 3 is used to install the bearing 2 .

[0054] Make a support plate 9; Figure 1 and Figure 6 As shown, the main body of the support plate 9 has the same structure as the front end cover 3, but no step hole is processed, and the outer diameter of the support plate 9 is consistent with the diameter of the circular groove of the motor housing 6.

[0055] Make a rear end cover 14; Figure 1 and Figure 10 As shown, the main structure of the rear end cover 14 is consistent with that of the front end cover 3, but no step hole is processed. A second threaded hole 17 is processed at a position corresponding to the step hole of the front end cover 3.

[0056] Make three filter plates 19; Figure 1 and Figure 7 As shown, the main body of the filter plate 19 is a circular ring structure. Figure 7 In the direction shown, a fan-shaped groove corresponding to the fan-shaped hollowing of the support plate 9 is opened on the front side of the filter plate 19, and a number of circular filter holes with equal spacing are processed in the fan-shaped groove; an inverted "U"-shaped through groove is opened on the front side of the filter plate 19, and the width of the through groove is consistent with the spacing of the fan-shaped hollowing of the lower half of the front end cover 3, and is consistent with the diameter of the rotating shaft 20, which is convenient for removal and installation without affecting the filtering effect; the outer circumferential wall of the filter plate 19 is processed with an external thread that cooperates with the internal thread of the front end cover 3; a sleeve is connected to the front side of the filter plate 19.

[0057] Step 2: Assembly

[0058] like Figure 1 As shown, the motor housing 6 is placed horizontally, with the base 18 installed at the bottom; the bearing 2 is installed on the inner ring of the front cover 3, the support plate 9, and the rear cover 14, and the annular groove of the front cover 3 is threadedly connected to the filter plate 19; the support plate 9 is installed in the circular groove of the motor housing 6, and the shaft 20 passes through the bearing 2 installed on the support plate 9; the rotor 8 is sleeved on the shaft 20 at one end of the front cover 3 in the motor housing 6, and the stator 7 is installed on the inner wall of the motor housing 6, corresponding to the position of the rotor 8;

[0059] like Figure 1 and Figure 9 As shown, the bearing 2 of the front cover 3 is mounted on the rotating shaft 20 at the left end of the motor housing 6, and the Figure 3 and Figure 1 As shown, the front cover 3 is fixed to the left end of the motor housing 6 by the cooperation of the screw 4 and the first threaded hole 5; the pulley 1 is installed on the left end of the rotating shaft 20; the rotating rectifier 11 and the excitation armature 13 are sequentially mounted on the rotating shaft 20 on the right side of the support plate 9 from left to right, and the specific positions are shown in FIG. Figure 8As shown, it is located below the flip cover 10; the excitation pole 12 is installed in the motor housing 6, and its position corresponds to the excitation armature 13;

[0060] like Figure 1 As shown, the bearing 2 of the rear end cover 14 is mounted on the shaft 20 at the right end of the motor housing 6; the fan 15 is fixed to the right end of the shaft 20; Figure 4 and Figure 1 As shown, the fan rear cover 16 is fixed to the rear end cover 14 by the cooperation of the screw 4 and the second threaded hole 17. The structure after installation is as follows Figure 8 shown.

[0061] Instructions for use are as follows:

[0062] When using, Figure 7 and 9 As shown, when the rotating rectifier 11 needs to be inspected, repaired or replaced, the flip cover 10 can be flipped upward along the pivot to open the rotating rectifier 11 for quick inspection;

[0063] After the generator has been working for a long time, in order to prevent the accumulation of dust and impurities, the filter plate 19 can be removed by rotating it with a wrench installed on the sleeve of the filter plate 19. Figure 7 As shown, the filter plate 19 is provided with an inverted U-shaped slot and is directly taken out from the rotating shaft 20 for cleaning.

[0064] The above solution realizes the quick maintenance and replacement of the rotating rectifier 11; the quick removal and cleaning of the filter plate 19, without the need to remove the entire motor rear cover and other components of the shaft 20, thereby reducing maintenance workload, improving reliability, and extending the service life of the generator.

Claims

1. A three-phase brushless synchronous generator, comprising a base (18), a hollow cylindrical motor housing (6) is fixed transversely on the base (18), the motor housing (6) is arranged to be connected to the left and right, a stator (7) with a cylindrical structure and connected to the left and right is installed on the inner wall of the motor housing (6), a rotating shaft (20) that can rotate forward and backward and passes through the left and right ends of the motor housing (6) is independently and transversely provided in the motor housing (6) inside the stator (7), a rotor (8) that cooperates with the stator (7) is installed on the rotating shaft (20) inside the stator (7), an excitation armature (13) is installed on the rotating shaft (20) on the right side of the stator (7), a rotating rectifier (11) is installed on the rotating shaft (20) between the stator (7) and the excitation armature (13), and an excitation pole (12) is installed on the inner wall of the motor housing (6) outside the excitation armature (13), characterized in that: A support plate (9) having a hub structure is provided between the rotor (8) and the rotating rectifier (11), and end covers having a hub structure are installed at both left and right ends of the motor housing (6), the end cover installed at the left end of the motor housing (6) is a front end cover (3), and the end cover installed at the right end of the motor housing (6) is a rear end cover (14), and the support plate (9) and the end cover are both installed on the rotating shaft (20) via bearings (2); The left end of the front cover (3), the right end of the support plate (9) and the left end of the rear cover (14) are all provided with a circular groove, the inner wall of the circular groove is provided with an internal thread, the inner thread of the circular groove is connected to a filter plate (19) having a circular ring structure, the outer wall of the filter plate (19) is provided with an external thread, and the filter plate (19) is provided with a through groove having a width greater than the diameter of the rotating shaft (20) and communicating with the inside and outside; A flip cover (10) that can be flipped open in a front-to-back direction is provided on the motor housing (6) between the support plate (9) and the rear end cover (14).

2. The three-phase brushless synchronous generator according to claim 1, characterized in that: A sleeve is mounted on the filter plate (19).

3. The three-phase brushless synchronous generator according to claim 2, characterized in that: The left side wall of the motor housing (6) is provided with a plurality of first threaded holes (5) uniformly spaced along the circumference, and the front end cover (3) is provided with countersunk holes corresponding to the first threaded holes (5), and screws (4) threadedly matched with the first threaded holes (5) are independently installed in the countersunk holes.

4. The three-phase brushless synchronous generator according to claim 3, characterized in that: The flip cover (10) is a semicircular arc plate.

5. The three-phase brushless synchronous generator according to claim 4, characterized in that: The flip cover (10) is located on the top of the motor housing (6), the rear end of the flip cover (10) is hinged to the motor housing (6), the front end of the flip cover (10) is fixed with a first connecting block (21), the first connecting block (21) is connected to a second connecting block (22), and the second connecting block (22) is fixed to the motor housing (6).

6. The three-phase brushless synchronous generator according to claim 5, characterized in that: A fan (15) is mounted on the rotating shaft (20) on the right side of the rear end cover (14), and a fan rear cover (16) is mounted on the right end of the rear end cover (14).

7. The three-phase brushless synchronous generator according to claim 6, characterized in that: A plurality of second threaded holes (17) evenly spaced along the circumference are transversely provided on the right side wall of the rear end cover (14), and through holes communicating left and right are provided on the fan rear cover (16) corresponding to the second threaded holes (17).

8. The three-phase brushless synchronous generator according to claim 7, characterized in that: A pulley (1) is mounted on the rotating shaft (20) on the left side of the front end cover (3).

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