Test arrangement structure of semi-direct-drive permanent magnet wind driven generator

Abstract

The utility model provides a semi-direct-drive permanent magnet wind driven generator test arrangement structure which comprises two experimental generators arranged face to face, dummy shafts sharing the same central axis are installed at the driving ends of the two generators, the rear ends of the dummy shafts are fixedly installed in a rotor, the middles of the dummy shafts are arranged in a hollow shaft, and the front ends of the two dummy shafts are connected through a coupler. The front side of the rotor is fixedly connected with the rear end of a hollow shaft through a connecting flange, the hollow shaft is arranged in a bearing seat, the outer sides of the front end and the rear end of the hollow shaft are rotationally connected with the bearing seat through a second tapered roller bearing and a first tapered roller bearing respectively, and a test end cover is fixed to the outer side of the front end of the bearing seat. According to the invention, the shafting load arrangement is optimized, the generator vibration is small, the bearing temperature rise is low, and the semi-direct-drive generator test is ensured to be smoothly carried out; the device can be used for testing the semi-direct-drive permanent magnet wind driven generator, and can also be applied to application occasions with test requirements in other fields.

Description

Technical Field

[0001] This invention relates to the field of semi-direct drive permanent magnet wind turbine technology, specifically to a test setup structure for a semi-direct drive permanent magnet wind turbine. Background Technology

[0002] Semi-direct drive permanent magnet generators all adopt a shaftless design. The generator mainly consists of a stator assembly, a rotor assembly, and a rear end cover. The generator requires a dedicated shaft system and supporting devices for routine and type testing.

[0003] Currently, the test shaft system of the semi-direct drive permanent magnet generator uses a ball bearing + column bearing configuration. The generator is tested back-to-back (non-drive end connected to non-drive end). Due to the large cantilever load on the shaft system, large vibrations and high bearing temperatures often occur during the test, making it impossible to conduct the test. Its structural form is as follows: Figure 1 As shown. Summary of the Invention

[0004] To address the aforementioned issues, this invention discloses a test layout structure for a semi-direct-drive permanent magnet wind turbine. This structure employs a "2TRB" bearing configuration for the test shaft system, which enhances the shaft system's load-bearing capacity. The generators are arranged face-to-face (drive end to drive end connected), optimizing the shaft load distribution, resulting in low generator vibration and low bearing temperature rise, thus ensuring the smooth conduct of the semi-direct-drive generator test.

[0005] The specific plan is as follows:

[0006] A semi-direct drive permanent magnet wind turbine test setup structure is characterized by comprising two test generators arranged face-to-face, with dummy shafts sharing a common central axis installed at the drive ends of the two generators. The rear ends of the dummy shafts are fixedly installed in the rotors, while the middle part is placed in a hollow shaft. The front ends of the two dummy shafts are connected by a coupling. The front side of the rotor is fixedly connected to the rear end of the hollow shaft via a connecting flange. The hollow shaft is placed in a bearing housing, and its front and rear outer ends are rotatably connected to the bearing housing via a second tapered roller bearing and a first tapered roller bearing, respectively. A test end cover is fixed to the outer front end of the bearing housing.

[0007] Furthermore, the rotor is fixedly connected to the connecting flange and the dummy shaft by bolts respectively.

[0008] Furthermore, the connecting flange and the hollow shaft are fixedly connected by bolts.

[0009] Furthermore, the first tapered roller bearing and the second tapered roller bearing are interference-fitted on the outside of the hollow shaft.

[0010] Furthermore, the front end of the hollow shaft is fixed with a pressure ring for pressing the first tapered roller bearing and the second tapered roller bearing by bolts.

[0011] Furthermore, the two generators are the drive unit and the test unit, respectively. The coupling is connected to the drive unit at one end and to the test unit at the other end via a tensioning sleeve.

[0012] The beneficial effects of this invention are as follows: This invention optimizes the shaft load arrangement, resulting in less generator vibration and lower bearing temperature rise, thus ensuring the smooth progress of semi-direct drive generator tests; it can not only be used for semi-direct drive permanent magnet wind turbine tests, but also for other applications with testing requirements. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the original semi-direct drive permanent magnet wind turbine test setup.

[0014] Figure 2 This is a schematic diagram of the structure of the present invention.

[0015] List of reference numerals in the attached diagram:

[0016] 1-Rotor, 2-Connecting flange, 3-Dummy shaft, 4-Test end cover, 5-Bearing housing, 6-Tap roller bearing, 7-Tap roller bearing, 8-Pressure ring, 9-Hollow shaft, 10-Coupling. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0018] like Figure 2 As shown, this application provides a semi-direct drive permanent magnet wind turbine test layout structure, including two test generators arranged face to face, and the drive ends of the two generators are equipped with a common central axis dummy shaft 3. The rear end of the dummy shaft 3 is fixedly installed in the rotor 1, and the middle part is placed in the hollow shaft 9. The front ends of the two dummy shafts 3 are connected by a coupling 10. The front side of the rotor 1 is fixedly connected to the rear end of the hollow shaft 9 by a connecting flange 2. The hollow shaft 9 is placed in a bearing seat 5, and the outer sides of its front and rear ends are rotatably connected to the bearing seat 5 by a second tapered roller bearing 7 and a first tapered roller bearing 6, respectively. The hollow shaft design facilitates the passage of the dummy shaft. A test end cover 4 is fixed to the outer side of the front end of the bearing seat 5.

[0019] In this embodiment, the rotor 1 is fixedly connected to the connecting flange 2 and the dummy shaft 3 by bolts.

[0020] In this embodiment, the connecting flange 2 and the hollow shaft 9 are fixedly connected by bolts.

[0021] In this embodiment, the first tapered roller bearing 6 and the second tapered roller bearing 7 are interference-fitted on the outside of the hollow shaft 9. This can improve the load-bearing capacity of the test shaft system and reduce the temperature rise of the test bearings.

[0022] In this embodiment, the front end of the hollow shaft 9 is fixed with a pressure ring 8 for pressing the first tapered roller bearing 6 and the second tapered roller bearing 7 by bolts.

[0023] In this embodiment, the two generators are the drive unit and the test unit, respectively. The coupling 10 is connected to the drive unit at one end and to the test unit at the other end through a tensioning sleeve.

[0024] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A test setup structure for a semi-direct drive permanent magnet wind turbine generator, characterized in that, The experimental generators are arranged face to face, and the driving ends of the two generators are equipped with a common central axis dummy shaft (3). The rear end of the dummy shaft (3) is fixedly installed in the rotor (1), and the middle part is placed in the hollow shaft (9). The front ends of the two dummy shafts (3) are connected by a coupling (10). The front side of the rotor (1) is fixedly connected to the rear end of the hollow shaft (9) through a connecting flange (2). The hollow shaft (9) is placed in a bearing seat (5), and the outer sides of its front and rear ends are rotatably connected to the bearing seat (5) through a second tapered roller bearing (7) and a first tapered roller bearing (6), respectively. The outer side of the front end of the bearing seat (5) is fixed with an experimental end cover (4).

2. The test layout structure for a semi-direct drive permanent magnet wind turbine generator according to claim 1, characterized in that, The rotor (1) is fixedly connected to the connecting flange (2) and the dummy shaft (3) by bolts respectively.

3. The test layout structure for a semi-direct drive permanent magnet wind turbine generator according to claim 1, characterized in that, The connecting flange (2) is fixedly connected to the hollow shaft (9) by bolts.

4. The test layout structure for a semi-direct drive permanent magnet wind turbine generator according to claim 1, characterized in that, The first tapered roller bearing (6) and the second tapered roller bearing (7) are interference-fitted on the outside of the hollow shaft (9).

5. The test layout structure for a semi-direct drive permanent magnet wind turbine generator according to claim 1, characterized in that, The front end of the hollow shaft (9) is fixed with a pressure ring (8) for pressing the first tapered roller bearing (6) and the second tapered roller bearing (7) by bolts.

6. The test layout structure for a semi-direct drive permanent magnet wind turbine generator according to claim 1, characterized in that, The two generators are the drive unit and the test unit, respectively. The coupling (10) is connected to the drive unit at one end and to the test unit at the other end through a tensioning sleeve.

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