CN201083185Y - Small-sized wind-driven generator - Google Patents

Abstract

A small generator, comprising a rear seat, a motor casing, a stator, a rotor, a rotor shaft, a first bearing supporting the rotor shaft, a hub disk, a front cover, and the end of the motor casing away from the rear seat and facing the rear seat A first boss is provided on the inner end surface, and a mounting hole for installing the first bearing is provided in the first boss, and the first bearing for supporting the rotor shaft is only installed on one side of the stator and the rotor, and one end of the first shaft is The end face of the motor casing resists, and the other end is resisted by the stop ring; the advantage of the generator of the present invention is that it can reduce the axial size, volume and weight of the motor, the counterweight of the rear seat and tail rudder, and reduce the wind power generator when starting. The starting torque is improved, the power generation effect is improved, the processing accuracy is reduced, and the processing cost is reduced.

Description

A small wind turbine

technical field

The utility model relates to a small wind power generator, in particular to a small wind power generator which can be used for wind power generation.

Background technique

Existing small wind power generators all have bearings installed on both sides of the generator rotor and stator, which must be provided with an end cover structure supporting the bearings on both sides of the generator rotor and stator. For example, the patent number is 200620055463.9, and the name is a technical solution disclosed by a small wind power generator. It is disclosed that bearings are installed at both ends of the generator shaft, and end cover structures for installing bearings are arranged at both ends of the motor casing, that is, bearings are installed on both sides of the generator rotor and stator. The disadvantage of this kind of generator is that the axial size of the motor is large, the volume of the motor is large, and the weight of the motor increases, which will increase the counterweight of the rear seat and tail rudder of the generator accordingly, and increase the starting torque when the motor starts, which is suitable for small power generators. As far as the machine is concerned, the power generation effect will be greatly reduced. In addition, both ends of the motor housing are provided with end cover structures for installing bearings, and the concentricity requirements of the mounting holes for installing bearings on the end covers at both ends must be very high, which will improve machining accuracy and increase processing costs.

Utility model content

The purpose of this utility model is to provide a small wind power generator that only needs to install bearings on one side of the generator rotor and stator, which can reduce the axial size, volume and weight of the motor, and reduce the machining accuracy of the motor casing.

A small wind power generator, including a rear seat, a motor casing, a stator, a rotor, a rotor shaft, a first bearing supporting the rotor shaft, a hub disk, and a front cover, the motor casing is fixed on the rear seat, and is installed on the front cover There are wind rotor blades, a first boss is provided on the inner end surface of the motor shell away from the rear seat and facing the rear seat, and a mounting hole for installing the first bearing is arranged in the first boss, and the first bearing is only Installed in the first bearing installation hole, the end of the first bearing far away from the back seat is resisted by the end face of the motor housing, and the end of the first bearing close to the back seat is provided with a limiting device that limits the first bearing in the installation hole, The end of the first bearing close to the back seat is resisted by the limit device; the stator is fixed on the motor casing, the rotor is fixed on the rotor shaft, the stator is installed outside the rotor, and the rotor shaft passes through the first bearing and the motor casing away from the rear seat. On the end face, the hub disk is fixed on the rotor shaft and is located on the side of the motor housing away from the rear seat; the rotor shaft passes through the hub disk, and the front cover is fixed on the end of the rotor shaft away from the rear seat. Since the bearing is only installed on one side of the rotor and stator of the generator, the axial size, volume and weight of the motor are reduced, which can reduce the counterweight of the tail rudder on the rear seat of the generator and reduce the starting torque when the motor starts. For small generators, the power generation effect will be greatly improved. In addition, only one mounting hole for mounting the bearing is provided at one end of the motor casing, and the concentricity requirement of the hole can be easily met, which can reduce processing accuracy and reduce processing cost.

As an improvement, an annular second boss is extended on the end face of the motor casing away from the rear seat, the rotor shaft passes through the center hole of the second boss, and an annular second boss is provided on the outer surface of the second boss. Drain tank; on the end face of the hub disk facing the motor housing, there are ring-shaped third bosses and fourth bosses, the third bosses and the fourth bosses are coaxial, and the third bosses are located on the fourth bosses Inside and higher than the fourth boss, the third boss extends into the center hole of the second boss, and the second boss is placed between the third boss and the fourth boss. The addition of the drain tank structure does not require other waterproof structures, which can effectively prevent external water from entering the airtight cavity formed by the motor casing and the rear seat, and improve the service life of the generator.

As an improvement, an annular groove is provided on the inner side wall of the first bearing installation hole near the rear seat, and the limiting device is a stop ring installed in the annular groove. This structure is simple and convenient Install.

As an improvement, there are two first bearings, which are installed together and are all installed in the first bearing installation holes. Two bearings are used to avoid line contact and surface contact to avoid bearing deflection.

As an improvement, a wear-resistant rubber ring is provided along the inner wall of the first bearing installation hole, and the first bearing is placed in the rubber ring. Since the first bearing is not in direct contact with the motor casing, the contact between the first bearing and the electric motor can be greatly reduced. Friction between the casings reduces the possibility of damage to the first bearing and motor casing.

As an improvement, the stator and the motor casing are interference fit, and radial stop screws are provided between the side of the stator and the side of the motor casing; the rotor and the rotor shaft are interference fit, and the end of the rotor shaft facing the rear seat is fixed with a first nut.

As a common improvement of the above scheme, the stator is electrically connected with the collector ring device, and the collector ring device includes a brush, a collector ring, a brush holder, a shaft circlip, a second bearing, a third bearing, a bearing spacer, a bearing end The cover, the bearing end cover, the second bearing, the bearing spacer, the third bearing, and the circlip for the shaft are sequentially set on the rotating shaft and placed in the cavity of the rear seat. The rotating shaft is perpendicular to the rotating shaft of the rotor, and the collector ring is supported on On the rotating shaft, the brush holder is supported on the third bearing and installed outside the rotating shaft and the collector ring. The brush holder and the collector ring are fixed on the rotating shaft perpendicular to the rotor shaft by screws, and the bearing end cover is fixed on the rear seat; The brush is in contact with the collector ring and electrically connected with the stator. The collector ring device with this structure has a simple structure and is easy to assemble.

Description of drawings

Figure 1 is a schematic cross-sectional view of the utility model cut from the center of the rotor shaft and detached from the front cover.

Detailed ways

As shown in Figure 1, a small-sized wind power generator includes a rear seat 1, a motor casing 2, a stator 3, a rotor 4, a stainless steel rotor shaft 5, two first ball bearings 6 of type 205 supporting the rotor shaft 5, The hub disc 7 and the front cover 8 are equipped with wind rotor blades (not shown) on the front cover 8, and a tail rudder 9 is provided on the rear seat 1.

A conical first boss 10 is provided on the inner end surface of the motor casing 2 away from the rear seat 1 and toward the rear seat 1 , and the first boss 10 is coaxial with the motor casing 2 . A mounting hole for installing the first ball bearing 6 is provided in the first boss 10 , and the first ball bearing mounting hole is coaxial with the first boss 10 . A wear-resistant rubber ring 11 is provided along the inner side wall of the first ball bearing installation hole, and the two first ball bearings 6 are installed in the rubber ring 11 . On the inner sidewall in the first ball bearing mounting hole, an end close to the rear seat 1 is provided with an annular groove, and an elastic stop ring 12 is installed in the annular groove, and the end of the first ball bearing 6 away from the rear seat 1 is electrically The end face of the casing 2 is resisted, and the end of the first ball bearing 6 close to the rear seat 1 is resisted by the stop ring 12 .

The stator 3 is fixed on the motor casing 2 , and the stator 3 and the motor casing 2 are in interference fit. A radial stop screw 13 is arranged between the side of the stator 3 and the side of the motor casing 2 . The rotor 4 is fixed on the rotor shaft 5 , the rotor 4 and the rotor shaft 5 are in interference fit, and the end of the rotor shaft 5 facing the rear seat 1 is fixed with a first nut 14 .

An annular second boss 15 is extended on the end face of the motor housing 2 away from the rear seat 1, the rotor shaft 5 passes through the first ball bearing 6, the end face of the motor housing 2 away from the rear seat 1, and the second boss 15 center holes. An annular drain tank 16 is provided on the outer surface of the second boss 15; an annular third boss 17 and a fourth boss 18 are extended on the end face of the hub 7 towards the motor housing 2, and Three bosses 17 and the fourth boss 18 are coaxial, the third boss 17 is located in the fourth boss 18 and higher than the fourth boss 18, the third boss 17 stretches into the center hole of the second boss 15 , the second boss 15 is placed between the third boss 17 and the fourth boss 18 . There is a concave hole on the end surface of the hub disc 7 away from the rear seat 1, the hub disc 7 is fixed on the rotor shaft 5 through a stainless steel nut 19, the stainless steel nut 19 is placed in the concave hole, and the hub disc 7 is located on the motor shell 2 away from the rear seat 1 side; the rotor shaft 5 passes through the hub disc 7, and the front cover 8 is fixed on the external thread 20 at the end of the rotor shaft 5 away from the end of the rear seat 1. The motor housing 2 is fixed on the back seat 1 by screws 32 .

The stator 3 is electrically connected to the slip ring 22 device, and the slip ring 22 device includes a brush 21, a slip ring 22, a brush holder 23, a shaft retaining spring 24, a second bearing 25 and a third bearing 26 of type 207, Bearing spacer 27, bearing end cover 28, bearing end cover 28, the second bearing 25, bearing spacer 27, the 3rd bearing 26, axle jumper 24 are enclosed within on the rotating shaft 29 successively and are placed in the space of rear seat 1. In the cavity, the rotating shaft 29 is perpendicular to the rotor rotating shaft 5, the collector ring 22 is supported on the rotating shaft, the brush holder 23 is supported on the third bearing 26 and installed outside the rotating shaft 29 and the collector ring 22, the brush holder 23, the collector The ring 22 is fixed on the rotating shaft 29 perpendicular to the rotor shaft 5 by a screw 30 , and the bearing end cover 28 is fixed on the rear seat 1 by a screw 31 . Brushes 21 are in contact with slip rings 22 and are electrically connected to stator 3 .

A method for assembling the above-mentioned small wind power generator, comprising the following steps:

First install the elastic rubber pad in the first ball bearing installation hole, and then install the first ball bearing 6 in the first ball bearing installation hole in the motor housing 2;

After the first ball bearing 6 is installed, the elastic stop ring 12 is installed in the annular groove, so that the end of the first ball bearing 6 away from the rear seat 1 is resisted by the end face of the motor housing 2, and the first ball bearing 6 is close to the rear One end of seat 1 is resisted by the annular groove;

After installing the annular groove, press the stator 3 in the motor casing 2, and the stator 3 and the motor casing 2 have an interference fit, so that the stator 3 is fixed in the motor casing 2;

After the stator 3 is installed, the rotor 4 is pressed on the rotor shaft 5 , and the rotor 4 and the rotor shaft 5 have an interference fit, so that the rotor 4 is fixed on the rotor shaft 5 .

After the rotor 4 is installed on the rotor shaft 5, the rotor shaft 5 on which the rotor 4 is installed is inserted into the first ball bearing 6 and the center hole of the motor housing 2, and then the motor housing 2 is fixed on the rear seat 1, Then the hub disk 7 is fixed on the rotor shaft 5 from the other side of the motor housing 2 .

Claims (7)

1. small-sized wind power generator, comprise back seat, motor casing, stator, rotor, rotor shaft, the clutch shaft bearing of support rotor axle, wheel hub plate, front shroud, motor casing is fixed on the back seat, wind wheel blade is installed on front shroud, it is characterized in that on the motor casing away from an end of back seat and on the interior edge face of back seat, be provided with first boss, in first boss, be provided with the mounting hole that clutch shaft bearing is installed, clutch shaft bearing only is installed in the clutch shaft bearing mounting hole, clutch shaft bearing is kept out by the end face of motor casing away from an end of back seat, be provided with near an end of back seat at clutch shaft bearing clutch shaft bearing is limited in limit stoper in the mounting hole, clutch shaft bearing is kept out near the limited device of an end of back seat; Stator is fixed on the motor casing, and rotor is fixed on the rotor shaft, and stator is installed in outside the rotor, and rotor shaft passes clutch shaft bearing and the motor casing end face away from back seat, and wheel hub plate is fixed on the rotor shaft, and is positioned at the side that motor casing deviates from back seat; Rotor shaft passes wheel hub plate, and front shroud is fixed on the end of rotor shaft away from back seat one end.

2. a kind of small-sized wind power generator as claimed in claim 1 is characterized in that deviating from motor casing and extends second boss that is provided with ring-type on the end face of back seat, and rotor shaft passes the center hole of second boss, is provided with the weather groove of ring-type on the outer side surface of second boss; On the end face of motor casing, extend the 3rd boss and the 4th boss that is provided with ring-type in wheel hub plate, the 3rd boss and the 4th boss are coaxial, the 3rd boss is positioned at the 4th boss and is higher than the 4th boss, the 3rd boss stretches in the center hole of second boss, and second boss places between the 3rd boss and the 4th boss.

3. a kind of small-sized wind power generator as claimed in claim 2 is characterized in that the end near back seat is provided with annular groove on the madial wall in the clutch shaft bearing mounting hole, and described limit stoper is the Sealing shield ring that is installed in the annular groove.

4. a kind of small-sized wind power generator as claimed in claim 3 is characterized in that described clutch shaft bearing is two, is installed together, and is installed in the clutch shaft bearing mounting hole.

5. a kind of small-sized wind power generator as claimed in claim 4 is characterized in that being provided with the abrasive rubber circle along the madial wall of clutch shaft bearing mounting hole, and clutch shaft bearing places in the rubber ring.

6. a kind of small-sized wind power generator as claimed in claim 5 is characterized in that stator and motor casing interference fit, is provided with rotation stopping screw radially between the side of the side of stator and motor casing; Rotor and rotor shaft interference fit are fixed with first nut at rotor shaft towards an end of back seat.

7. as any described a kind of small-sized wind power generator of claim 1 to 6, it is characterized in that stator is electrically connected with collector machine, collector machine comprises brush, collector ring, brush holder, the axle jump ring, second bearing, the 3rd bearing, the bearing spacer, bearing (ball) cover, bearing (ball) cover, second bearing, the bearing spacer, the 3rd bearing, axle is enclosed within on the running shaft successively with jump ring and places in the cavity of back seat, running shaft is vertical with rotor shaft, collector ring is supported in the rotating shaft, brush holder is supported on the 3rd bearing and is installed in outside running shaft and the collector ring, brush holder, on the running shaft vertical with rotor shaft, bearing (ball) cover is fixed on the back seat collector ring by screw; Brush contacts with collector ring and is electrically connected with stator.