Large box-type variable-frequency variable-speed synchronous brushless excitation generator

Abstract

The invention discloses a large box-type variable-frequency variable-speed synchronous brushless excitation generator. The excitation generator comprises an integrated casing, a cooler is mounted on the upper side of the integrated casing, the cooler is provided with an air inlet and an air outlet, and a stator assembly is arranged in the integrated casing in a clearance fit manner; and the motorfurther comprises a rotor assembly mounted in the stator assembly in a matched mode, wind screens are respectively arranged on two sides of the stator assembly along the axial direction of a rotor atintervals, axial fans are arranged at positions, corresponding to the wind screens, of two ends of the rotor assembly, a hot air area is formed between the two wind screens in the integrated casing, the hot air area is communicated with the air inlet of the cooler, a cold air area is formed outside the two wind screens, the cold air area is communicated with the air outlet of the cooler, and the cold air area and the hot air area are communicated through the axial fans to form a cooling air path. A box-type structure and a modular assembly design are adopted, so the installation cost and the manufacturing cost are greatly reduced, no crossing of air paths during running of the generator is ensured, and the good cooling effect of the motor is ensured.

Description

technical field [0001] The invention relates to the technical equipment field of large-scale box-type generators, in particular to a large-scale box-type variable-frequency variable-speed synchronous brushless excitation generator. Background technique [0002] With the development of energy, the application of natural gas energy is more and more extensive, but the distribution of energy is not uniform, natural gas needs to be transported by pipeline, and many booster and decompression stations are set up in the natural gas pipeline. During the decompression process, its energy is huge. Now it is basically lost in vain. In order to save energy, the energy can be recovered by adopting the method of differential pressure power generation, but the change of pressure is not constant, so the speed of the expander and other equipment driven by it cannot be constant, so the generator needs To adapt to variable speed and variable frequency power generation conditions, the research a...

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Problems solved by technology

Although seat bearings or steel end cover bearings can be used to solve this problem, these two conventional structures increase the weight of the bearing and the whole machine and increase the cost. At the same time, the generator shaft system of the seat bearing structure is long, These problems limit the scope of generator manufacturing and use occasions

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