CN2130004Y

CN2130004Y - High speed ac motor

Info

Publication number: CN2130004Y
Application number: CN 92200611
Authority: CN
Inventors: 王长伦
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-01-10
Filing date: 1992-01-10
Publication date: 1993-04-14
Anticipated expiration: 2002-01-10

Abstract

The utility model discloses a high speed AC motor, which is composed of two sets of stators and a rotor. The rotor of a first-stage motor drives the stator of a second-stage motor to synchronously rotate, and the output rotation speed of the motor is 3000-6000r/min. The motor of the utility model is characterized in that the both ends of a rotary housing are respectively supported by bearings which are arranged at the same axial lead on the end covers of the both ends of a fixed housing. The utility model has the advantages of reasonable integral structure design, good dynamic balancing performance, strong surge capability, convenient use and maintenance, high output rotation speed and broad speed-regulating range.

Description

High speed ac motor

The utility model relates to a kind of by two stators and two high speed alternating current motors that rotor assembles, wherein the support of this motor stator and stationary housing is assembled into one, a rotor is positioned at the rotating magnetic field that this stator forms, and the rotary shell that fuses with it rotates synchronously; Another stator of this motor is assemblied in the above-mentioned rotary shell, and another rotor of output shaft axle one end passes the said fixing housing end plug, the drive mechanism high speed rotating.

Known ordinary ac asynchronous motor, when supply frequency 50Hz powered, the maximum speed limit all is lower than per minute 3000 changeed.Need the high speed alternating current motor to drag occasion to some, realize alternating current motor from the output of height rotating speed, only way is the frequency of supply that improves motor.

Improve frequency of supply two kinds of methods are arranged at present usually.The first drags an induction generator with an alternating current motor common power is carried out frequency modulation.Supply with another alternating current motor then, make it export high rotating speed, the shortcoming of this method is the work system complexity, equipment investment height, floor space are big, it two is to utilize the frequency-variable electronic device, improve the frequency of supply of motor, the problem that exists is that main components and parts price is higher, and harmonic loss is arranged, and capacity motor and overload capacity are low.

Introduced a kind of high speed AC asynchronous motor in the CN90202210 patent specification, it is to utilize one group of alternating current machine as the electromagnetism speed increasing mechanism, and drag another stator of organizing motor rotation, make the stack of output rotor generation speed, the high rotating speed of output 3000～6000r/min.We can say that technique scheme is the another new method that realizes that alternating current motor is exported at a high speed.Yet not enough is that the whole rotating part of this motor (comprising two rotors and a stator) supports by output shaft fully, and output shaft discontinuity, high speed rotating produce inertia makes output shaft produce the elasticity sex change easily, and dynamic balance performance is relatively poor, and this is an one; Its two, this motor can't step start, works independently; Its three, limited by project organization, the high-speed bearing that is sleeved on the output shaft is positioned at motor internal, can't carry out regular maintenance and repairing to it, will inevitably influence the result of use of high speed AC induction motor.

The purpose of this utility model is to overcome the existing deficiency of above-mentioned high speed AC asynchronous motor, a kind of supporting structure design is reasonable more, dynamic balance performance is good and provide, be convenient to the high speed alternating current motor of maintenance and repair, so that export the high rotating speed of 3000～6000r/min.

The utility model design principle is identical with the design principle of CN90202210 patent, and its structure can be considered the mutual combination of two mouse cage asynchronous motors.For conveniently narration and understanding, with above-mentioned two alternating current motor called after I, II level motor.In fact, I level motor and common AC motor structure are basic identical, and the rotor of different is I level motor rotates synchronously by the stator that a rotary shell drags II level motor, makes the rotor of II level motor and output shaft thereof can produce high rotating speed.This high speed ac motor structure characteristics be this motor rotary shell two ends respectively by be positioned at same axial line and with the supporting of stationary housing end cap assembling all-in-one-piece bearing.In the said structure and since the rotary shell two ends by bearing fixing on end cap, during the work of this motor, rotary shell just can rotate by held stationary, improves the dynamic balance performance of motor.

This high speed alternating current motor has kept every technical performance of existing alternating current machine fully, and basic identical with existing motor aspect manufacturing process and motor use.This motor is more suitable for the occasion of output speed area requirement broad is used, and can select single machine operation or bi-motor to work simultaneously according to load, also can realize the motor step start.This electromotor overload ability is strong, uses with easy to maintenance.

Fig. 1 is the utility model series-mode frame schematic diagram.

Fig. 2 is the parallel structural representation of the utility model.

Introduce two specific embodiments of the utility model respectively below in conjunction with Fig. 1 and Fig. 2

Alternating current motor shown in Figure 1 can be considered two interconnected cage motor series connection and assembles, and we are referred to as motor I and motor II.Wherein the stator 6 of motor I is assemblied in the stationary housing 7, and rotor 5 and output shaft 3 usefulness bearings 4 thereof are assemblied on housing 7 two end cap 1.With nut 12 output shaft 3 of motor I and the rotary shell 10 of motor II are fused between above-mentioned two motors.The stator 6 of motor II is assemblied in the rotary shell 10, by slip ring 9 supply powers that are arranged on rotary shell 10 1 ends.When this machine operation, motor I output shaft 3 drives motor II rotary shell 10 and rotates, and rotor 5 and its output shaft 3 of motor II just produce high rotating speed.

For the ease of the heat radiation of this motor, the suitable position of above-mentioned

housing

7,10 is processed with ventilation hole 8.For the protection motor bearings can be provided with baffle plate 2 on the outside of stationary housing 7 end cap 1, this plate washer is useful on the oil filler point 11 that injects lubricating oil to each bearing.Stator and rotor structure that this motor adopted are same as the prior art.

Motor shown in Figure 2 is made up of two squirrel-cage motors in parallel, the rotor 5 of motor I that different with above-mentioned series-mode frame is directly is assemblied on the rotary shell 10 of motor II, motor has only an output shaft 3, and output shaft 3 supports respectively by the inside and outside two groups of bearings 4 that are assemblied on the stationary housing 7 both sides end caps 1 with the two ends of rotary shell 10, and drive mechanism is comparatively simple.The label of parts shown in Fig. 2 is identical with Fig. 1, and operation principle is also identical, no longer too much narrates at this.

This high speed alternating current motor can be exported 3000～6000r/min rotating speed, can directly satisfy people so that this velocity interval is selected for use the motor needs, has improved motor working efficiency.

Claims

1, a kind of high speed alternating current motor of forming by two groups of stators and rotor, wherein this motor stator 6 is assemblied on the stationary housing 7, its rotor 5 is positioned at the rotating magnetic field that this stator forms, and fuse with rotary shell 10 and to rotate synchronously, another stator 6 is assemblied in the above-mentioned rotary shell 10, drive another rotor 5, output shaft 3 one ends pass the end cap 1 of stationary housing 7 and are positioned at outside this end cap, it is characterized in that the two ends of said rotary shell 10 are bearing on the two ends end cap 1 of stationary housing 7 by being positioned at the same wholeheartedly bearing 4 of line respectively.

2, motor according to claim 1, the two ends that it is characterized in that said output shaft 3 and rotary shell 10 are respectively by inside and outside two groups of bearings 4 supportings that are assemblied on the stationary housing 7 both sides end caps 1.

3, motor according to claim 1 and 2 is characterized in that an end of said rotary shell 10 is equipped with slip ring 9.

4, motor according to claim 1 is characterized in that the suitable position of said stationary housing 7 and rotary shell 10 is processed with ventilation hole 8.