Sealing structure of direct-driven wind power motor

Abstract

The utility model discloses a sealing structure of a direct-drive wind power motor, and belongs to the technical field of sealing of direct-drive wind power motors. Comprising a reinforcing disc, a sealing installation ring plate and C-shaped seals, the reinforcing disc is arranged at the tail end of the non-driving side of a rotor support of the motor, the two C-shaped seals are symmetrically and fixedly arranged on the two sides of the reinforcing disc, the two sealing ring plates are arranged corresponding to the C-shaped seals, and the two sealing ring plates are symmetrically fixed to the sealing installation ring plate. The sealing ring plates are inserted into the C-shaped seals from the C-shaped lips of the C-shaped seals, the C-shaped lips make contact with the inner walls and the outer walls of the sealing ring plates correspondingly to form sealing structures, and the two C-shaped seals are matched with the two sealing ring plates correspondingly to form a double-layer sealing structure. According to the utility model, double-layer sealing is formed through the two C-shaped seals, so that the possibility that external foreign matters such as rain, snow, sand and dust enter the motor from a stator and rotor separation position is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to direct drive wind power motor sealing technical field, concretely relates to a direct drive wind power motor sealing structure. BACKGROUND

[0002] The existing wind turbine is generally installed and operated in the area with severe natural environment, often accompanied by large wind sand, frequent frost and dew condensation, high humidity, serious salt fog and the like, under these conditions, in order to avoid the foreign matter into the generator interior, ensure that the long-term reliable operation of the key components such as the winding and the core in the motor interior, the sealing protection of the motor is required to be higher, especially the direct drive wind turbine, on the one hand, the motor is located outside the cabin, more easily directly subjected to the impact and erosion of sand, rain, snow, salt fog and the like, on the other hand, the stator and the rotor structure of the direct drive motor are relatively large, leading to that the matching part of the stator and the rotor is prone to large deformation, and the effective and reliable sealing at the dynamic and static separation part of the stator and the rotor is also a difficulty in the motor design.

[0003] In the sealing structure of the existing wind turbine, the utility model patent: a wind turbine generator sealing structure, the authorized publication number: CN202309322U discloses the rotor sealing structure fixedly connected with the rotor of the generator assembly, and the stator sealing structure fixedly connected with the stator of the generator assembly, the above sealing structure all contains the sealing ring, wherein, the two sealing rings are all the structure with the slot, the openings of the slots are opposite, the edge of the rotor sealing ring opening outside is bent to the opening inside in the rotor sealing structure, the interference fit is formed, the stator sealing structure has the elastic contact with the rotor sealing structure, and the sealing is formed.

[0004] The above technology has the following problems:

[0005] Single layer sealing, more easily directly subjected to the impact and erosion of sand, rain, snow, salt fog and the like, leading to that the matching part of the stator and the rotor is prone to large deformation.

[0006] The shaft distance cannot be adjusted, local wear and deformation are prone to occur, and the stability of the motor is reduced. SUMMARY

[0007] The utility model discloses a direct drive wind power motor sealing structure to overcome the above problems, to achieve the effective and reliable sealing of the dynamic and static separation part of the stator and the rotor of the direct drive wind turbine.

[0008] To achieve the above object, the utility model adopts the following technical scheme:

[0009] A sealing structure for a direct-drive wind turbine is characterized by comprising a reinforcing disc, a sealing mounting ring plate, and a C-type seal. The reinforcing disc is disposed at the non-drive end of the rotor support of the motor. Two C-type seals are symmetrically fixed on both sides of the reinforcing disc, and two sealing ring plates are disposed corresponding to the C-type seals. The two sealing ring plates are symmetrically fixed on the sealing mounting ring plate. The sealing ring plates are inserted into the C-type seals from the C-type lips. The C-type lips contact the inner and outer walls of the sealing ring plates respectively to form a sealing structure. The two C-type seals cooperate with the two sealing ring plates to form a double-layer sealing structure.

[0010] The C-type seal has a protrusion on its upper part, and the reinforcing disc has grooves on both sides that match the protrusion; the protrusion and the grooves cooperate to form a fixed shape.

[0011] The C-shaped sealing protrusions are fixed by being squeezed and pressed on opposite sides by sealing blocks.

[0012] The sealing block and the reinforcing plate are fixed together by bolts.

[0013] The sealing ring plate is bolted to the sealing mounting ring plate.

[0014] A sealing gasket is provided between the sealing ring plate and the sealing mounting ring plate.

[0015] The reinforcing disc has a retaining ring at its end, and the radial distance d between the retaining ring and the sealing mounting ring plate is set within the range of 7-11 mm.

[0016] The C-shaped sealing lip has two sides that are set at different heights.

[0017] The two C-shaped sealing lips are positioned on the lower side near the retaining ring.

[0018] The cavity formed by the C-shaped lip of the C-type seal and the sealing ring plate is filled with lubricating oil.

[0019] The advantages of using this utility model are:

[0020] By using two C-type seals to form a double-layer seal, the possibility of foreign objects such as rain, snow, and dust entering the motor from the stator-rotor separation position is further reduced.

[0021] The outer C-type seal provides some protection for the inner C-type seal, slowing down the aging process of the inner seal and ensuring the reliability of the overall seal.

[0022] The axial distance between the sealing ring plate and the retaining ring can be adjusted by the sealing gasket to ensure the symmetry between the C-type seal and the sealing ring plate, thereby improving the follow-up deformation of the C-type seal and avoiding excessive local wear on the C-type lip of the seal.

[0023] Adding lubricating oil to the cavity formed by the compression of the C-type seal and the sealing ring plate can effectively reduce the wear of the sealing element and improve the service life of the sealing device. Attached Figure Description

[0024] Fig. 1 This is a longitudinal sectional view of the wind turbine of this utility model;

[0025] Fig. 2 This is an enlarged view of the sealing structure of this utility model.

[0026] The markings in the diagram are: 1. Reinforcing disc, 2. Sealing mounting ring plate, 3. Sealing pressure block, 4. C-type seal, 5. Sealing ring plate, 6. Sealing gasket, 7. Retaining ring, 8. Cavity, 9. Rotor bracket, 10. Support ring, 11. Stator base. Detailed Implementation Example 1

[0027] This embodiment, in conjunction with the accompanying drawings, further illustrates the structure and principle of this utility model:

[0028] A sealing structure for a direct-drive wind turbine includes a reinforcing disc 1, a sealing mounting ring plate 2, and a C-type seal 4. The reinforcing disc 1 is located at the non-drive end of the rotor support 9 of the motor. Two C-type seals 4 are symmetrically fixed on both sides of the reinforcing disc 1, and two sealing ring plates 5 are provided corresponding to the C-type seals 4. The two sealing ring plates 5 are symmetrically fixed on the sealing mounting ring plate 2. The sealing ring plates 5 are inserted into the C-type seals from the C-type lips of the C-type seals 4. The C-type lips contact the inner and outer walls of the sealing ring plates 5 respectively to form a sealing structure. The two C-type seals 4 cooperate with the two sealing ring plates 5 to form a double-layer sealing structure.

[0029] The C-type seal 4 has a protrusion on its upper part, and the reinforcing disc 1 has grooves on both sides that match the protrusion; the protrusion and the grooves cooperate to form a fixed shape.

[0030] The C-shaped seal 4 is fixed by the sealing pressure block 3 on the opposite side of the protrusion.

[0031] The sealing ring plate 5 is bolted to the sealing mounting ring plate 2.

[0032] A sealing gasket 6 is provided between the sealing ring plate 5 and the sealing mounting ring plate 2.

[0033] The end of the reinforcing disc 1 has a retaining ring 7, and the radial distance d between the retaining ring 7 and the sealing mounting ring plate 2 is set in the range of 7-11mm.

[0034] The C-type seal has a 4C-type lip with different heights on both sides.

[0035] The two C-type seals 4C-type lips are positioned on the lower side near the retaining ring 7.

[0036] The cavity 8 formed by the compression of the C-type seal 4C-type lip and the sealing ring plate 5 is filled with lubricating oil.

[0037] The following section, in conjunction with the accompanying drawings, provides a detailed explanation of this scheme. Figs. 1-2 As shown, this utility model proposes a sealing structure for a direct-drive wind turbine, which includes a reinforcing disc 1 disposed on the non-drive side of the generator, a sealing mounting ring plate 2 disposed on the non-drive end of the generator stator frame 11, a sealing pressure block 3, a C-type seal 4, a sealing ring plate 5, and a sealing gasket 6, etc.

[0038] The reinforcing disc 1 is installed at the non-drive side end of the rotor support 9 to achieve isolation between the inside and outside of the non-drive side of the generator. The inner and outer end faces of the reinforcing disc 1 are provided with annular grooves for installing C-type seals 4 near the inner diameter. The shape of the grooves is adapted to the installation position of the C-type seals 4. The two are connected by the sealing pressure block 3 to form a double seal. Compared with the single-layer sealing structure, the double-layer sealing structure has better protection performance, further reducing the possibility of foreign objects such as rain, snow and dust entering the motor from the stator-rotor separation position. At the same time, the outer seal plays a certain role in protecting the inner seal, delaying the aging process of the inner seal, and ensuring the reliability of the overall seal.

[0039] A retaining ring 7 is connected to the inner end of the reinforcing disc 1. The retaining ring 7 is axially positioned at the center of the space enclosed by the inner and outer C-type seals 4. A support ring 10 is provided on the inner end face of the reinforcing disc 1 near the outer circle. The outer circle stop of the support ring 10 and the inner circle stop of the rotor support 9 at the non-drive side end are interference-fitted, with an interference amount of 0-0.2mm. Several sealing gaskets 6 of varying thicknesses can be provided between the sealing ring plate 5 and the sealing mounting ring plate 2, depending on the installation fit, to ensure the axial distance between the retaining ring 7 and the sealing ring plates 5 at both ends. Based on the specific dimensions of the stator and rotor after installation, the axial distance between the sealing ring plate 5 and the retaining ring 7 can be adjusted using the sealing gaskets to ensure the symmetry between the C-type seal 4 and the sealing ring plate 5, thereby improving the follow-up deformation of the C-type seal 4 and avoiding excessive local wear on the sealing C-type lip. The reinforcing disc structure serves both as part of the sealing device and as a radial support for the rotor support, improving air gap deformation.

[0040] The C-type seal 4 has its C-shaped lip facing inwards, and it is pressed together with the sealing ring plate 5 to complete a double-layer seal. Lubricating oil is filled into the cavity 8 formed by the pressing. Adding lubricating oil to the cavity formed by the C-type seal and the sealing ring plate effectively reduces wear on the sealing element and extends the lifespan of the sealing device.

[0041] Depending on the installation fit, sealing gaskets 6 of various thicknesses can be provided between the sealing ring plate 5 and the sealing mounting ring plate 2 to ensure the axial distance between the retaining ring 7 and the sealing retaining rings 5 ​​at both ends.

Claims

1. A sealing structure for a direct-drive wind turbine, characterized in that: The device includes a reinforcing disc (1), a sealing mounting ring plate (2), and a C-type seal (4). The reinforcing disc (1) is located at the non-drive end of the rotor support (9) of the motor. Two C-type seals (4) are symmetrically fixed on both sides of the reinforcing disc (1). Two sealing ring plates (5) are set corresponding to the C-type seals (4). The two sealing ring plates (5) are symmetrically fixed on the sealing mounting ring plate (2). The sealing ring plates (5) are inserted into the C-type seal from the C-type lip of the C-type seal (4). The C-type lip contacts the inner wall and outer wall of the sealing ring plate (5) respectively to form a sealing structure. The two C-type seals (4) cooperate with the two sealing ring plates (5) to form a double-layer sealing structure.

2. The sealing structure of a direct-drive wind turbine according to claim 1, characterized in that: The C-type seal (4) has a protrusion on the upper part, and the reinforcing disc (1) has grooves on both sides that match the protrusion; the protrusion and the groove cooperate to form a fixed shape.

3. The sealing structure of a direct-drive wind turbine according to claim 2, characterized in that: The C-type seal (4) is fixed by the sealing block (3) pressing the opposite side of the protrusion.

4. The sealing structure of a direct-drive wind turbine according to claim 3, characterized in that: The sealing block (3) is fixed to the reinforcing plate (1) by bolts.

5. The sealing structure of a direct-drive wind turbine according to claim 1, characterized in that: The sealing ring plate (5) is bolted to the sealing mounting ring plate (2).

6. The sealing structure of a direct-drive wind turbine according to claim 5, characterized in that: A sealing gasket (6) is provided between the sealing ring plate (5) and the sealing mounting ring plate (2).

7. The sealing structure of a direct-drive wind turbine according to claim 1, characterized in that: The end of the reinforcing disc (1) has a retaining ring (7), and the radial distance d between the retaining ring (7) and the sealing mounting ring plate (2) is set in the range of 7-11mm.

8. The sealing structure of a direct-drive wind turbine according to claim 1, characterized in that: The C-type seal (4) has two sides with different heights.

9. The sealing structure of a direct-drive wind turbine according to claim 7, characterized in that: The two C-type seals (4) have their C-type lips positioned on the lower side near the retaining ring (7).

10. A sealing structure for a direct-drive wind turbine according to claim 5, characterized in that: The cavity (8) formed by the C-type lip of the C-type seal (4) and the sealing ring plate (5) is filled with lubricating oil.

Images