CN202206232U

CN202206232U - Motor with low mechanical loss

Info

Publication number: CN202206232U
Application number: CN2011203260958U
Authority: CN
Inventors: 张国扬; 吴逢生
Original assignee: Shanghai Chuanye Electric Motor Co Ltd; SHANGHAI TOP MOTOR CO Ltd
Current assignee: Shanghai Chuanye Electric Motor Co Ltd; SHANGHAI TOP MOTOR CO Ltd
Priority date: 2011-09-01
Filing date: 2011-09-01
Publication date: 2012-04-25
Anticipated expiration: 2021-09-01

Abstract

The utility model relates to a motor with low mechanical loss, belonging to the technical field of motor, resolving the technical problem of reducing mechanical loss, comprising a housing, and a stator and a rotor which are both mounted inside the housing, wherein the front and rear ends of the housing are respectively sealed by an end cap, the rotor is coaxially fixed on a rotating shaft, both ends of the rotating shaft are mounted on the end caps of the front end rear ends of the housing respectively through bearings, the rear end of the rotating shaft is coaxially and fixedly provided with a fan blade, and the fan blade is located at the rear of the rear end cap. The motor with low mechanical loss is characterized in that the rear end cap is provided with an annular groove surrounding the rotating shaft, the annular groove is coaxial with the rotating shaft and the opening of the annular groove is unidirectionally configured towards rear, the fan blade is provided with an annular flange surrounding the rotating shaft and protruding forwards, and the annular flange is coaxial with the rotating shaft and extends into the annular groove on the rear end cap in a movable connection manner. The motor is low in mechanical loss and high in efficiency.

Description

The motor that a kind of mechanical loss is low

Technical field

The utility model relates to motor technology, particularly relates to the technology of the low motor of a kind of mechanical loss.

Background technology

Motor is a kind of equipment that converts electric energy to mechanical energy, absorbs electrical power from electric system during operation, to the mechanical system output mechanical power.The operating efficiency of motor is higher, does not have flue dust, smell again, and is free from environmental pollution, and noise is also less, obtained extensive use in each side such as industrial and agricultural production, communications and transportation, national defence, commerce and household electrical appliance, medical appliance equipments.

Improve motor efficiency and be motor manufacturer an important topic will facing, and the factor that influences motor efficiency mainly is made up of core loss, copper (stator and rotor winding) loss, mechanical loss and stray loss.Mechanical loss wherein is mainly by the wind moussing loss of bearing friction loss, bearing grease resistance loss, fan, and the outside framework oil seal and the rotating shaft frictional dissipation that are contained on the end cap are formed.

As shown in Figure 2; Existing motor is mainly by casing 1 '; And be installed in stator, the rotor composition in the casing 1 ' respectively, and each is sealed the rear and front end of its casing 1 ' by end cap 2 ', and its rotor is fixed in the rotating shaft 3 '; The two ends of rotating shaft 3 ' each through Bearing Installation on the end cap 2 ' of casing 1 ' rear and front end, the rear end of rotating shaft 3 ' is provided with fan blade 4 '.Be equipped with the outside framework oil seal 6 ' of annular on the front and rear cover 2 ' of existing motor; The inner ring of each outside framework oil seal 6 ' props up the side face of rotating shaft 3 '; To prevent that lubricating oil or water from getting into casing 1 ' inner chamber from rear end cap 2 ' and rotating shaft 3 ' junction surface, still when rotating shaft 3 ' is rotated, can produce frictional force radially between the inner ring of outside framework oil seal 6 ' and the side face of rotating shaft 3 '; Thereby generation mechanical loss; The power consumption of this frictional force is directly proportional with the rotating speed of rotating shaft 3 ', contact area, can reduce the efficient of motor, particularly influences bigger to two utmost points and the thicker motor of the rotating shaft diameter of axle.

The utility model content

To the defective that exists in the above-mentioned prior art, it is high that the utility model technical problem to be solved provides a kind of efficient, and the low motor of mechanical loss.

In order to solve the problems of the technologies described above, the low motor of a kind of mechanical loss that the utility model provided comprises casing; Reach the stator, the rotor that are installed in respectively in the casing; The rear and front end of said casing each by end cap sealing, said rotor coaxial is fixed in the rotating shaft, the two ends of this rotating shaft each through Bearing Installation on the end cap of casing rear and front end; And the coaxial fan blade that is fixed with in its rear end, this fan blade is positioned at the rear of rear end cap;

It is characterized in that: said rear end cap is provided with the toroidal cavity of a circle around the shaft, and this toroidal cavity is coaxial and unidirectionally open backward with rotating shaft;

Said fan blade is provided with a circle and the annular flange of protrusion around the shaft forward, and this annular flange is coaxial with rotating shaft, and stretches in the toroidal cavity on the rear end cap, and does not contact mutually with rear end cap.

Further, the rear end of said casing is installed with a fan housing in fan blade and rear end cap all covered at.

The motor that the mechanical loss that the utility model provides is low; Through cooperating of the annular flange on the toroidal cavity on the rear end cap and the fan blade; Reach and prevent that lubricating oil or water from getting into the purpose of chassis cavity from rear end cap and rotating shaft junction surface, thereby save the outside framework oil seal of being habitually practised on the conventional motors rear end cap, and the annular flange on the fan blade does not contact with rear end cap mutually; Thereby effectively reduce the mechanical loss of motor, and then improved the efficient of motor.

Description of drawings

Fig. 1 is that cut away view is looked on the left side, rear portion of the low motor of the mechanical loss of the utility model embodiment;

Fig. 2 is that cut away view is looked on the left side, rear portion of existing motor.

Embodiment

Embodiment to the utility model describes in further detail below in conjunction with description of drawings, but present embodiment is not limited to the utility model, and analog structure of every employing the utility model and similar variation thereof all should be listed the protection range of the utility model in.

As shown in Figure 1; The low motor of a kind of mechanical loss that the utility model embodiment is provided comprises casing 1, and is installed in stator, rotor in the casing 1 respectively; Each is sealed the rear and front end of said casing 1 by an end cap 2; Said rotor coaxial is fixed in the rotating shaft 3, the two ends of this rotating shaft 3 each through Bearing Installation on the end cap 2 of casing 1 rear and front end, and the coaxial fan blade 4 that is fixed with in its rear end; This fan blade 4 is positioned at the rear of rear end cap 2, and the rear end of said casing 1 is installed with a fan housing 5 in fan blade 4 and rear end cap 2 all covered at;

It is characterized in that: said rear end cap 2 is provided with the toroidal cavity of 3 one circles around the shaft, and this toroidal cavity and rotating shaft 3 are coaxial and unidirectionally open backward;

Said fan blade 4 is provided with 3 one circles and the annular flange 41 of protrusion around the shaft forward, and this annular flange 41 is coaxial with rotating shaft 3, and stretches in the toroidal cavity on the rear end cap 2, and does not contact mutually with rear end cap 2.

The principle that the utility model embodiment reduces mechanical loss is following:

When rotating shaft was rotated, rotating shaft only connected rear end cap through bearing, and the annular flange on the fan blade does not contact with rear end cap mutually; Reduced the mechanical loss that outside framework oil seal brought of conventional motors; Can improve the efficient of motor, toroidal cavity and the annular flange on the fan blade on the rear end cap constitute a maze-type structure, thereby prevent that effectively lubricating oil or water from getting into chassis cavity from rear end cap and rotating shaft junction surface; Even if there is big water gaging to be sprayed onto the motor rear portion; Under the block resistance of fan housing, fan blade and maze-type structure, can effectively avoid water to get into chassis cavity, its waterproof effect can reach the degree of protection of IP55 through test.

Claims

1. motor that mechanical loss is low; Comprise casing, and be installed in stator, rotor in the casing respectively, each is sealed the rear and front end of said casing by an end cap; Said rotor coaxial is fixed in the rotating shaft; The two ends of this rotating shaft each through Bearing Installation on the end cap of casing rear and front end, and the coaxial fan blade that is fixed with in its rear end, this fan blade is positioned at the rear of rear end cap;

2. motor according to claim 1 is characterized in that: the rear end of said casing is installed with a fan housing in fan blade and rear end cap all covered at.