CN204179804U

CN204179804U - A kind of high-speed electric expreess locomotive based on Cone gas lubricating bearings

Info

Publication number: CN204179804U
Application number: CN201420509715.5U
Authority: CN
Inventors: 何立爽
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-09-04
Filing date: 2014-09-04
Publication date: 2015-02-25
Anticipated expiration: 2024-09-04

Abstract

The utility model discloses a kind of high-speed electric expreess locomotive based on Cone gas lubricating bearings, solve the heating of conventional high rate bearing in motor, energy consumption is high, the life-span is short and the problem such as easy rotating shaft locking inefficacy.Rotor in the utility model high-speed electric expreess locomotive adopts Cone gas bearings, and lubricating system is hydrostatic lubrication, and throttling form is orifice restriction.By providing gases at high pressure to the air vent at motor two ends, rotor can be realized very easily and follow the completely isolated of stator.Conical bearing surface can provide combines support to rotor axial and radial direction, achieves the cramped construction of two bearings rotors, reduces the coefficient of friction of bearing, add the overall efficiency of motor, simplify gas bearing structure, improve the rotating accuracy of rotor.

Description

A kind of high-speed electric expreess locomotive based on Cone gas lubricating bearings

Technical field

The utility model relates to a kind of high-speed electric expreess locomotive based on Cone gas lubricating bearings.

Background technology

The application of high-speed electric expreess locomotive widely, can be used for the centrifugal compressor of air-conditioning or refrigerator, the turbocharging of hybrid vehicle, the stand-by power supply of some critical facilitys can also be used for, or as independent current source or small hydropower station, make up the deficiency etc. of concentration supply power.

The rotating speed of high-speed electric expreess locomotive reaches more than 10000r/min usually.What main flow high-speed electric expreess locomotive adopted in the market is ceramic roller bearing.Ceramic bearing has the characteristics such as high temperature resistant, wear-resisting, corrosion-resistant, diamagnetic electric insulation, high rotating speed.But the coefficient of friction of ceramic bearing is comparatively large, therefore in operation process, heating is large, energy consumption is high, is unfavorable for the raising of rotating speed.

Gas bearing is called as the bearing of lubricant with gas (mainly using air or Working medium gas).Gas bearing can realize the running of high speed, and its rotational line speed can reach 100m/s or higher, and this can meet the requirement of high-speed electric expreess locomotive; Because the coefficient of viscosity of gas is very little, the coefficient of friction agent friction power loss of gas bearing is very low; Rotor and stator can separate by the air film of gas bearing completely, produce wearing and tearing hardly; The machining accuracy of gas bearing is very high, and the gap between its rotor and stator is in micron dimension, and therefore the rotating accuracy of gas bearing is very high, and radial beat eccentricity during rotation can reach sub-micrometer scale, and this high rotating accuracy can keep for a long time.

Gas bearing is the optimal selection supporting high-speed electric expreess locomotive rotor.

In patent disclosed in existing application, existing precedent gas bearing being applied to high-speed electric expreess locomotive.But its supporting way is journal bearing and thrust bearing to the radial basis axial motion of restrict rotor respectively.But this supporting form complex structure, usually need three to four bearings to carry out support rotor, part is various, and processing cost is very high.

For solving the problem, the invention discloses a kind of high-speed electric expreess locomotive based on Cone gas lubricating bearings, namely adopting two conical bearings to realize combining support to rotor radial and axial.Like this, both can utilize the low-friction coefficient advantage of gas lubrication, additionally reduce bearing number, make more compact structure, and save processing cost.

Utility model content

According to membrane formation mechanism, gas bearing is divided into hydrodynamic bearing and hydrostatic bearing two class.The former is that the kinetic effect relying on rotor high-speed to rotate produces gas lubrication film; The latter is that external high pressure source of the gas provides gases at high pressure and produces lubricating film.

The bearing capacity of hydrostatic bearing does not affect by rotor speed, and gas film stiffness is more stable, and the utility model adopts hydrostatic lubrication form.

The utility model is characterized in that: adopt two conical bearings to be mounted opposite same containing on armature spindle, overall structure is divided into two parts: be positioned at the Cone gas bearing portions at two ends and be positioned at the high-speed induction motor part at middle part.Cone gas bearing portions comprises by face, bearing moved end 5 and face, bearing fixed end 6; Face, bearing fixed end 6 is processed with high pressure air cavity 1, throttle orifice 2 and sealing shroud 10.High-speed induction motor part comprises armature spindle 8, stator 11, rotor 12, cooling jacket 13 and motor housing 14.Motor housing there are air admission hole 16 and steam vent 15; Motor housing is provided with the air admission hole 16 that pre-high pressure air cavity 1 communicates; Steam vent 15 is through holes that shell connects motor internal, and gas flows through throttle orifice 2 from high pressure air cavity 1.

The utility model adopts two conical bearings to be mounted opposite same containing on armature spindle, and overall structure can be divided into two parts: be positioned at the Cone gas bearing portions at two ends and be positioned at the high-speed induction motor part at middle part.Cone gas bearing portions comprises by face, bearing moved end 5 and face, bearing fixed end 6; Face, bearing moved end 5 is furnished with counterweight hole 3, first installing hole 4 and second and installs 7.Face, bearing fixed end 6 is processed with high pressure air cavity 1, throttle orifice 2 and sealing shroud 10.High-speed induction motor part comprises armature spindle 8, stator 11, rotor 12, cooling jacket 13 and motor housing 14.The utility model outside is also provided with air admission hole 16 and steam vent 15; Motor housing is provided with the air admission hole 16 that pre-high pressure air cavity 1 communicates; Steam vent 15 is through holes that shell connects motor internal, and gas flows through throttle orifice 2 from high pressure air cavity 1.The utility model has following technical benefits:

1. owing to have employed the minimum gas bearing of frictional force, greatly reduce coefficient of friction, thus effectively reduce the energy loss in motor operation course on bearing, add the useful life of motor;

2., because air is constantly circulation, therefore avoid heating problem in motor long time running;

3., relative to existing gas bearing, adopt two conical bearings to achieve and support is combined, more compact structure to the radial direction of rotor and axis; The number of supporting surface is reduced to 2 by 4, reduces the required precision in the course of processing, and bearing clearance can be ensured by the fine setting of axis, and manufacturability is better.

4. conical bearing has self-aligning function, and the rotating accuracy of rotor can be made higher.

Accompanying drawing explanation

Fig. 1 is the profile of high-speed electric expreess locomotive described in the utility model.

Fig. 2 is the product design figure of high-speed electric expreess locomotive described in the utility model.

Fig. 3 is A direction view.

In figure, 1---high pressure air cavity; 2---throttle orifice, 3---counterweight hole, 4---the first installing hole, 5---face, bearing moved end, 6---face, bearing fixed end, 7---the second installing hole, 8---armature spindle, 9---pilot hole, 10---sealing shroud, 11---stator, 12---rotor, 13---cooling jacket, 14---motor housing.

Embodiment

As shown in Figure 1 and Figure 2, the utility model provides a kind of gas lubrication high-speed electric expreess locomotive.The rotor of motor adopts circular cone hydrostatic gas-lubricated bearing to support at two ends, namely have two conical bearings, the independent air feed of each conical bearing, throttle orifice form adopts orifice restriction.

Gases at high pressure (0.4 ~ 0.6MPa) enter from the air vent 16 at motor two ends, formed and all press in the high pressure air cavity 1 on face, bearing fixed end 6.As shown in Figure 1, face, bearing fixed end is furnished with axially uniform throttle orifice 2, and gases at high pressure flow through throttle orifice 2 from high pressure air cavity 1, enter lubricated surface.Because lubrication gas is gases at high pressure, can play a supporting role to the rotating part of motor, retrain the motion that it is axial and radial.Gases at high pressure enter air by steam vent 15.Steam vent 15 is through holes that shell connects motor internal, and it is the mouth of a cabling, and gases at high pressure also can from discharging here simultaneously.Face, bearing moved end 5 is furnished with counterweight hole 3, first installing hole 4 and second and installs 7.

Bearing rotor end 5 is coupled together with armature spindle 8 by the second installing hole 7.

Stator 11 has coil, when have electric current by time, due to galvanomagnetic effect, generate an electromagnetic field power, and rotor 12 is rotated, and drives the armature spindle 8 that connects firmly with it and bearing rotor end 5 to rotate.

This conical bearing both can provide radial support to rotor, again can the moving axially of restrict rotor, and two bearings can complete support rotor, achieves the object of designs simplification; Further, conical bearing has automatic centering effect, and rotor can be made to keep very high rotating accuracy when High Rotation Speed.

Claims

1. the high-speed electric expreess locomotive based on Cone gas lubricating bearings, it is characterized in that: adopt two conical bearings to be mounted opposite same containing on armature spindle, overall structure is divided into two parts: be positioned at the Cone gas bearing portions at two ends and be positioned at the high-speed induction motor part at middle part; Cone gas bearing portions comprises by face, bearing moved end and face, bearing fixed end; Face is processed with high pressure air cavity, throttle orifice and sealing shroud in bearing fixed end; High-speed induction motor part comprises armature spindle, stator, rotor, cooling jacket and motor housing; Motor housing there are air admission hole and steam vent; Motor housing is provided with the air admission hole that pre-high pressure air cavity communicates; Steam vent is the through hole that shell connects motor internal, and gas flows through throttle orifice from high pressure air cavity.