Horizontal testing device for permanent magnet wind driven generator

Abstract

The invention provides a horizontal testing device for a permanent magnet wind driven generator, which can accurately test the performance of a motor, does not need a gear box in a type test, and gets rid of the bottleneck of the manufacturing period of the gear box. Two symmetrical supports and two symmetrical supporting seats are arranged on a base, the two supporting seats are located between the two supports, bolts used for fixing a stator in a tested device are arranged on the end faces of the outer sides of the two supports, and two sliding bearing seats are arranged on the two supporting seats respectively. A tool shaft penetrating through the through holes in the two supports is arranged on the sliding bearing seat in a sliding mode, and flanges connected with a rotor in a tested device through bolts are arranged at the two ends of the tool shaft.

Description

Technical Field

[0001] The invention relates to a horizontal test device for a permanent magnet wind generator, in particular to a horizontal test device for a type test of an offshore medium-speed permanent magnet wind generator. Background Art

[0002] In the past, factory tests of medium-speed permanent magnet generators were all conducted in the form of a "generator + gearbox + main shaft system" combination. The purpose of the type test is to measure the basic performance of the generator (such as efficiency characteristics, insulation characteristics, no-load back electromotive force, shaft voltage characteristics, vibration characteristics, noise characteristics, and mechanical assembly). However, due to the excessive load on the gearbox, the loss analysis test in the form of a combination cannot accurately separate the mechanical loss and stator core loss, resulting in a dispersion of the efficiency test values.

[0003] In addition, due to the long production and manufacturing cycle of medium-speed gearboxes, even after the generator is produced, it is still necessary to wait for the gearbox materials to be available before type testing can be carried out, which delays the design and finalization and hanging test cycle of the entire unit, and cannot adapt to the current situation of rapid response and multi-model iteration of domestic wind turbines.

[0004] Moreover, the type test of the "generator + gearbox + main shaft system" combination adopts the traditional coupling drag structure. The generator alignment is difficult and time-consuming. The alignment accuracy deviation directly affects the generator air gap value. At the same time, it introduces additional vibration sources to the test system, which brings great challenges to the accuracy of the generator test. Summary of the invention

[0005] The purpose of the present invention is to provide a horizontal test device for a permanent magnet wind turbine generator, which can accurately test the motor performance, and the type test does not require a gear box, thus getting rid of the bottleneck of the gear box manufacturing cycle.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] A horizontal test device for a permanent magnet wind turbine generator has two symmetrical brackets and two symmetrical support seats on the base, the two support seats are located between the two brackets, the outer end faces of the two brackets are provided with bolts for fixing the stator in the tested device, two sliding bearing seats are respectively arranged on the two support seats, a tooling shaft passing through the through holes on the two brackets is slidably arranged on the sliding bearing seats, and both ends of the tooling shaft have flanges connected to the rotor in the tested device by bolts.

[0008] In the above-mentioned horizontal test device, an adjusting gasket is provided between the sliding bearing seat and the supporting seat.

[0009] The horizontal test device comprises a windshield installed on the inner end surface of the bracket to close the through hole, the tooling shaft passes through the through hole in the center of the windshield, and the windshield is composed of at least two centrosymmetrical fan-shaped plates spliced ​​together.

[0010] The above-mentioned horizontal test device comprises an air guide tube located in the through hole, one end of which is fixed on the wind shield plate, and the air guide tube is composed of at least two centrosymmetrical arc plates spliced ​​together.

[0011] In the above-mentioned horizontal test device, keyways are provided on the end faces of both ends of the tooling shaft.

[0012] In the above-mentioned horizontal test device, the outer end surfaces of the two brackets are provided with stoppers for positioning the stator.

[0013] Beneficial effects of the present invention:

[0014] During the test, the two generators are installed on both sides of the bracket, symmetrically placed. The two bearings are placed in the middle of the bracket, also symmetrically placed. Therefore, the two generators are directly installed on the horizontal test device, one as a motor and the other as a generator, and the test can test the accurate basic performance data of the motor. In this way, the type test does not rely on the gearbox, getting rid of the bottleneck of the gearbox manufacturing cycle.

[0015] The air gap between the stator and the rotor can be easily adjusted by changing the number of adjusting gaskets between the sliding bearing seat and the supporting seat.

[0016] In order to simulate the actual wind path during type testing, a wind shield is installed on the radial position of the inner end face of the bracket until the tooling axis to achieve the generator cavity sealing, and an air guide plate is installed at the axial position of the wind shield and the generator air gap to achieve the wind resistance path of the actual working conditions of the generator.

[0017] To facilitate installation and testing of different wind resistance paths, the wind deflector and wind guide tube have a three-petal structure and can be replaced with different shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a horizontal test device for a permanent magnet wind turbine in a test state (with a generator and a motor connected on both sides).

[0019] Figure 2 It is a partial schematic diagram of the bracket, etc.

[0020] Figure 3 This is a schematic diagram of the air duct.

[0021] Figure 4 It is a schematic diagram of a curved plate.

[0022] Figure 5 yes Figure 1 D-direction view.

[0023] Figure 6 It is a schematic diagram of a fan-shaped plate.

[0024] Figure 7 It is a schematic diagram of the flange end face. DETAILED DESCRIPTION

[0025] See also Figure 1 The horizontal test device for permanent magnet wind turbine shown in the figure has two symmetrical brackets 2 and two symmetrical support seats 3 on the base 1. The two support seats 3 are located between the two brackets. The outer end faces of the two brackets have stoppers and are connected to the stator 100 by bolts 3. Two sliding bearing seats 4 are respectively arranged on the two support seats 3. The tooling shaft 5 passing through the through hole in the center of the windshield and the through hole on the bracket is slidably arranged on the sliding bearing seat. The two ends of the tooling shaft have flanges 51 and are connected to the rotor 200 by bolts. Keyways are provided on the end faces of the flanges at both ends of the tooling shaft.

[0026] The sliding bearing seat 4 with a sliding bearing belongs to the prior art, and an adjusting gasket 6 is arranged between the bottom of the sliding bearing seat and the supporting seat 3 .

[0027] The wind shield plate 7 installed on the inner side end surface of the bracket to close the through hole is composed of three centrosymmetrical sector plates 71 spliced ​​together.

[0028] One end of the air guide tube 8 located in the through hole is fixed on the wind shield plate, and the air guide tube is composed of three centrosymmetrical arc plates 81 spliced ​​together.

[0029] The tooling shaft 5 is made of 45A steel forging material. In the traditional coupling connection structure, the rotor is divided into two shafts, which are connected by a coupling in the middle. At this time, it is necessary to adjust the center axis of the two rotors. However, this structure only uses one shaft, and the flanges at both ends of the tooling shaft are processed at the same time, which can ensure the centering accuracy of the rotors at both ends.

[0030] When testing the generator, refer to Figure 7 , the screw holes on the outermost circle of the flange on the end face of the tooling shaft are bolted to the generator rotor. And for different generators, the rotor adapter can be installed on both ends of the tooling shaft, and the rotor adapter is then connected to the generator rotor to achieve the universal effect of the tooling. When used for testing other types of generators, the adapter can be connected by bolts and keys in the screw holes on the inner circle of the flange, and the rotor adapter is then connected to the rotor by bolts. Of course, the outer end faces of the two brackets can also fix the stator transfer device, and the stator adapter is then connected and fixed to the stator.

[0031] The overall bracket consisting of the base, bracket, support seat, etc. needs to support the stable operation of two generators and two sliding bearings. The two generators are installed on both sides of the bracket, symmetrically placed. The two bearings are placed in the middle of the bracket, also symmetrically placed. The stopper processing of the end plates at both ends of the bracket needs to be completed after the overall welding of the bracket is completed, and the stopper size is processed at the same time to ensure the stator alignment of the two generators.

[0032] This structure uses sliding bearings to support the tooling shaft and rotor. The center height of the sliding bearing seat can be adjusted by adding or removing adjusting gaskets between the sliding bearing seat and the support seat, thereby adjusting the air gap between the stator and the rotor. The sliding bearing is lubricated with circulating oil to reduce the friction between the bearing and the shaft, while taking away the heat generated by the bearing friction.

[0033] The two sides in the middle of this structure are open. In order to simulate the actual wind path during type testing, it is necessary to install a wind shield on the radial position of the inner end face of the bracket until the tooling axis to achieve the generator cavity sealing, and install an air guide plate at the axial position of the wind shield and the generator air gap to achieve the wind resistance path of the actual working conditions of the generator.

[0034] To facilitate installation and testing of different wind resistance paths, the wind deflector and wind guide plate have a three-petal structure and can be replaced with different shapes.

Claims

1. A horizontal test device for a permanent magnet wind turbine generator, characterized by: The base is provided with two symmetrical brackets and two symmetrical support seats, the two support seats are located between the two brackets, the outer end faces of the two brackets are provided with bolts for fixing the stator in the tested device, the two sliding bearing seats are respectively arranged on the two support seats, the tooling shaft passing through the through holes on the two brackets is slidably arranged on the sliding bearing seats, and the two ends of the tooling shaft are provided with flanges connected to the rotor in the tested device by bolts.

2. The horizontal test device according to claim 1, characterized in that: An adjusting gasket is arranged between the sliding bearing seat and the supporting seat.

3. The horizontal test device according to claim 1, characterized in that: It comprises a windshield installed on the inner side end surface of the bracket to close the through hole, the tooling shaft passes through the through hole in the center of the windshield, and the windshield is composed of at least two centrally symmetrical fan-shaped plates spliced ​​together.

4. The horizontal test device according to claim 3, characterized in that: The utility model comprises an air guide tube located in the through hole, one end of which is fixed on the wind shield plate, and the air guide tube is composed of at least two centrosymmetrical arc plates spliced ​​together.

5. The horizontal test device according to claim 1, characterized in that: Keyways are provided on the end faces of both ends of the tooling shaft.

6. The horizontal test device according to claim 1, characterized in that: The outer end surfaces of the two brackets are provided with stoppers for positioning the stator.

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