Sealing device for power generator bearing

Abstract

The invention discloses a sealing device for a power generator bearing. The sealing device for a power generator bearing comprises a bearing inner cap 6 and a bearing outer cap 1 which sleeve a rotary shaft 8; an inner oil flinger 7 is arranged on the inner side of the bearing inner cap 6; an outer oil flinger 2 is arranged on the inner side of the bearing outer cap 1, the inner oil flinger 7 and the outer oil flinger 2 sleeve the rotary shaft 8, a bearing 5 is arranged between the inner oil flinger 7 and the outer oil flinger 2 and thermally sleeves the rotary shaft 8, the bearing 5 is fixedly connected to a bearing block 4, and a closed space is formed after the bearing block 4, the bearing inner cap 6 and the bearing outer cap 1 are fixed. Sealing of a power generator bearing part can be realized by a relatively simple internal structure, and the two oil flingers are configured, such that leaked oil can be controlled, and the effects of reducing the size and structural complexity of the sealing device and improving the durability of the sealing device are achieved. In addition, sealing structures in the prior art are not needed to be combined, therefore, the cost of the sealing device can be reduced.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of generator bearing sealing, and in particular to a generator bearing sealing device. Background technique [0002] A wind turbine is generally understood as a power device that converts wind energy into mechanical work, which drives the rotor to rotate, and finally outputs alternating current. Wind turbines generally include mechanisms such as wind rotors, generators, steering devices (tail fins), towers, speed-limiting safety mechanisms, and energy storage devices. The wind rotor rotates under the action of wind force, transforming the kinetic energy of the wind into the mechanical energy of the wind rotor shaft, and the generator rotates to generate electricity under the drive of the wind rotor shaft. [0003] At present, the commonly used sealing measures for wind turbines using rolling bearings mainly include: axial labyrinth seals, radial labyrinth seals, skeleton seals, sea...

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Problems solved by technology

[0004] The inventor found that the bearing sealing device in the prior art has at least the following defects: in the existing bearing sealing method, the axial labyrinth seal and the radial labyrinth seal have a large volume due to the complicated structure of the sealing parts.

Although the existing skeleton seals and sealing ring seals have small sealing volumes, the materials of the seals are mostly rubber chemical products, which are prone to aging at low temperatures and frequent temperature changes

At the same time, rubber materials are prone to miscibility with grease, resulting in seal failure or grease deterioration, affecting lubrication and sealing effects

In addition, in actual use, existing sealing devices often adopt a sealing structure combining one or more sealing methods. Although the sealing performance is guaranteed to a certain extent, the cost is relatively high, and the air flow in the bearing part cannot be affected. To promote the effect, it is easy to cause the temperature rise of the bearing part to be too high

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