CN112653276A - Split type rotor lead-out wire structure of wind driven generator - Google Patents

Abstract

The invention discloses a split type rotor outgoing line structure of a wind driven generator, wherein a split type insulating sleeve of the split type rotor outgoing line structure consists of a bottom sleeve, a middle sleeve and a top sleeve; conductive rod inserting holes are respectively formed in the bottom sleeve, the middle sleeve and the top sleeve; the side wall of the bottom sleeve is provided with an electrical connection hole which is communicated with each conducting rod insertion hole and corresponds to each conducting rod insertion hole; the outer circumferential surface of the middle section sleeve is distributed with a plurality of thread inserts, and through holes which are in one-to-one correspondence with the thread inserts are arranged on a generator shaft; a drawing thread insert is arranged on the front end face of the top sleeve; the conducting rod is inserted into the bottom sleeve, the middle sleeve and the top sleeve, the bottom sleeve, the middle sleeve and the top sleeve are sequentially spliced and arranged in a shaft hole of the generator, and the total length of the conducting rod is matched with the length of the shaft hole of the generator. The invention can improve the structural stability and reliability of the outgoing line part.

Description

Split type rotor lead-out wire structure of wind driven generator

Technical Field

The invention relates to a split type rotor lead-out wire structure of a wind driven generator, which is used in the field of motor manufacturing.

Background

The outgoing line of the wind driven generator rotor mainly plays a role in connecting the internal winding of the generator rotor with the frequency converter. The traditional rotor lead-out wire is the self-control copper bar of cable conductor or outsourcing insulation, cable conductor usually. Due to the characteristics of low voltage and large current of the wind driven generator and the trend of continuously improving the capacity of a single machine, the reliability requirement of the rotor lead-out wire is continuously improved, and the traditional rotor lead-out wire is difficult to meet the process requirement of application. The main problem is that the doubly-fed generator is used for rotor excitation, a variable frequency power supply provided by a converter needs to be introduced into a rotor winding, so that an outgoing line in the middle directly bears the impact of the variable frequency power supply, the rotor rotates at a high speed, and the outgoing line needs to consider the mechanical fixing problem. The leading-out wire is a key node of the motor, once the leading-out wire is damaged, the rotor is directly grounded, instantaneous high current is caused, and even a rotor winding of the generator and a power module of the converter can be damaged. So that the whole unit cannot normally generate electricity. Developing a robust rotor lead-out structure is a major goal of the skilled artisan.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a split rotor lead-out wire structure of a wind driven generator, which can improve the structural stability and reliability of the lead-out wire part.

One technical scheme for achieving the purpose is as follows: a split type rotor outgoing line structure of a wind driven generator comprises a split type insulating sleeve and a conducting rod, wherein the split type insulating sleeve consists of a bottom sleeve, a middle sleeve and a top sleeve;

conductive rod inserting holes are respectively formed in the bottom sleeve, the middle sleeve and the top sleeve;

the side wall of the bottom sleeve is provided with an electrical connection hole which is communicated with each conducting rod insertion hole and corresponds to each conducting rod insertion hole;

the outer circumferential surface of the middle section sleeve is distributed with a plurality of thread inserts, and through holes which are in one-to-one correspondence with the thread inserts are arranged on a generator shaft;

a drawing thread insert is arranged on the front end face of the top sleeve;

the conducting rod is inserted into the bottom sleeve, the middle sleeve and the top sleeve, the bottom sleeve, the middle sleeve and the top sleeve are sequentially spliced and arranged in a shaft hole of the generator, and the total length of the conducting rod is matched with the length of the shaft hole of the generator.

Furthermore, the split type insulating sleeve is made of high-temperature and low-temperature resistant polymer resin through die pressure casting.

Furthermore, epoxy pipes are arranged in the conductive rod inserting holes of the bottom sleeve, the middle sleeve and the top sleeve, and the conductive rods are inserted in the epoxy pipes.

According to the split rotor lead-out wire structure of the wind driven generator, the insulating sleeve is split, the two ends of the conducting rod are provided with the connecting screw holes and the through holes, the conducting rod is assembled in the epoxy pipe, the split insulating sleeve is assembled on the outer side of the conducting rod, and the conducting rod is screwed in the bolt from the outside through the steel threaded insert, so that the conducting rod is fixedly connected with a generator shaft. Each conducting rod and the insulating sleeve assembly are inlaid with steel threaded inserts according to different position structures and fixing requirements and can be prefabricated in advance according to the structural design of the motor. The invention solves the problems of poor mechanical fixing effect and easy abrasion of the external insulation of the electric conductor. Meanwhile, external insulation is not required to be manually wrapped, so that the labor is reduced, and the quality problem is avoided. The reliability of the generator is improved, and the manufacturing cost is reduced. The structure is simpler and more reasonable, and the implementation is easy.

Drawings

FIG. 1 is a schematic structural diagram of a split rotor lead-out wire structure of a wind driven generator according to the present invention;

FIG. 2 is a front view of abottom sleeve 1 of a split rotor lead-out structure of a wind driven generator according to the present invention;

FIG. 3 is a sectional view taken along line B-B of FIG. 2;

FIG. 4 is a front view of themiddle sleeve 2 of the split rotor lead-out structure of the wind driven generator of the present invention;

fig. 5 is a cross-sectional view of thetop sleeve 3 of the split rotor lead-out wire structure of the wind driven generator.

Detailed Description

In order to better understand the technical solution of the present invention, the following detailed description is made by specific examples:

referring to fig. 1, the split rotor lead-out wire structure of the wind driven generator of the present invention is composed of abottom sleeve 1, amiddle sleeve 2, atop sleeve 3, an epoxy tube 4 and aconductive rod 5. Wherein, three-phase conducting rod inserting holes are respectively arranged in thebottom sleeve 1, themiddle sleeve 2 and thetop sleeve 3. Thebottom sleeve 1, themiddle sleeve 2 and thetop sleeve 3 are made of high-temperature and low-temperature resistant polymer resin and are formed by die pressure casting.

Referring to fig. 2 and 3, the sidewall of thebottom sleeve 1 is provided with anelectrical connection hole 11 corresponding to each of the conductive rod insertion holes and leading to the conductive rod insertion hole. Referring to fig. 4, 3 threadedinserts 21 are distributed on the outer circumferential surface of themiddle sleeve 2, and through holes corresponding to the threaded inserts one to one are formed on the generator shaft for fixing the rotor lead-out wires during assembly. Referring to fig. 5, the front end surface of thetop sleeve 3 is provided with a drawing thread insert 31 for subsequent maintenance.

The epoxy tube 4 is sleeved outside theconductive rod 5 and used for protecting theconductive rod 5. The conductingrod 5 is made of red copper, the structure can be in a whole copper rod or multi-strand stranded wire form, and the specific size and form are determined according to the passing voltage and current values.

The conducting rod is protected by a split type insulating sleeve and is fixed in a shaft hole of the generator. The insulating sleeve can be manufactured in advance. According to the actual length in shaft hole, choose the length of epoxy pipe and conducting rod for use, assemble again. And then may be bolted. The conducting rod as a key electrical connector is well protected, and after the structure is adopted, the rotor outgoing line as a whole cannot be influenced by manual operation, and meanwhile, the rotor outgoing line is convenient to install, and the reliability of the whole machine is improved.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims (3)

1. A split type rotor outgoing line structure of a wind driven generator comprises a split type insulating sleeve and a conducting rod, and is characterized in that the split type insulating sleeve consists of a bottom sleeve, a middle sleeve and a top sleeve;

conductive rod inserting holes are respectively formed in the bottom sleeve, the middle sleeve and the top sleeve;

the side wall of the bottom sleeve is provided with an electrical connection hole which is communicated with each conducting rod insertion hole and corresponds to each conducting rod insertion hole;

the outer circumferential surface of the middle section sleeve is distributed with a plurality of thread inserts, and through holes which are in one-to-one correspondence with the thread inserts are arranged on a generator shaft;

a drawing thread insert is arranged on the front end face of the top sleeve;

the conducting rod is inserted into the bottom sleeve, the middle sleeve and the top sleeve, the bottom sleeve, the middle sleeve and the top sleeve are sequentially spliced and arranged in a shaft hole of the generator, and the total length of the conducting rod is matched with the length of the shaft hole of the generator.

2. The split rotor outgoing line structure of the wind driven generator as claimed in claim 1, wherein the split insulation sleeve is made of high and low temperature resistant polymer resin by pressure casting with a mold.

3. The split rotor outgoing line structure of the wind driven generator as claimed in claim 1, wherein epoxy tubes are respectively disposed in the conductive rod insertion holes of the bottom sleeve, the middle sleeve and the top sleeve, and the conductive rods are inserted into the epoxy tubes.

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