CN203352314U

CN203352314U - Water-cooled motor

Info

Publication number: CN203352314U
Application number: CN2013202335570U
Authority: CN
Inventors: 胡文源; 王晔靖
Original assignee: Shanghai Shi Qiang Electric Applicance Co Ltd
Current assignee: Shanghai Shi Qiang Electric Applicance Co Ltd
Priority date: 2013-05-03
Filing date: 2013-05-03
Publication date: 2013-12-18
Anticipated expiration: 2023-05-03

Abstract

The utility model discloses a water-cooled motor comprising a stator core, a cooling water sleeve, a rotor core, a rotating shaft and a first cavity. A contacting circle of the stator core and the cooling water sleeve is uniformly provided with stator axial air channels, a circle of the rotor core adjacent to the rotating shaft is uniformly provided with rotor axial air channels, and a fan is sleeved at a contacting position of the upper rotating shaft of the rotating shaft and the first cavity. The rotor core can be fully contacted with the cooling water sleeve via high-speed airflow and heat is transmitted to a cooling medium; the fan is driven to rotate by the rotation of the rotating shaft and circulatory high-speed airflow continuously flows so that the radiation condition of the rotor core is improved, the temperature rising difference between the stator core and the rotor core is greatly reduced, the dimension chain change due to temperature difference is prevented, and the stable operation of the motor is guaranteed; since an end cover employs radiating ribs rather than water cooling to radiate, the temperature difference between an inner ring and an outer ring of a bearing is significantly reduced, and the service lifetime of the bearing is extended, and the reliable operation of the bearing is improved.

Description

A kind of water cooled machine

Technical field

The utility model relates to technical field of motors, relates in particular to a kind of water cooled machine.

Background technology

Motor (English: Electric machinery is commonly called as " motor ") refers to according to the law of electromagnetic induction realizes electric energy conversion or a kind of calutron transmitted.

In prior art, water cooled machine flows in the cooling water spacer of support and end cap by cooling water, the parts such as stator core, stator winding, casing are directly cooled, and to rotating parts cooling condition extreme differences such as rotor and rotating shafts.

Referring to Fig. 1, Fig. 1 is the structural representation of water-cooled machine in prior art.

Water-cooled machine mainly comprises rotating shaft 1, rotor core 2, stator core 3 and motor cavity 4, and the chamber wall of motor cavity 4 arranges cooling water spacer 41; Rotor bushing iron core 2 in rotating shaft 1, rotor core 2 overcoats set sub-iron core 3, between rotor core 2 and stator core 3, certain gap is arranged, the inwall combination of rotating shaft 1 and rotor core 2, stator core 3, motor cavity 4 is partitioned into the first cavity 42 and the second cavity 43 by motor cavity 4.

Due to parts such as stator core 3, stator winding 5, nearer apart from cooling water spacer 41, by conduction of heat, there is good cooling effect; Otherwise, the parts far away apart from cooling water spacer 41, as rotating partss such as rotor core 2, rotating shafts, only by conduction of heat, take away the part heat, in the situation that frequent starting and long-time heavy-duty service, the heat that rotor bar and rotor core 2 produce can not get distributing in time, and makes rotor temperature rise too high.

Referring to Fig. 2, Fig. 2 is the Temperature Distribution block diagram at traditional water-cooled machine each position of motor internal in the nominal load situation.

As shown in Figure 2, because traditional water cooled machine stator core and rotor core cooling condition are widely different, cause the position temperature such as stator core, casing very low, and the position temperature such as rotor core, rotating shaft and bearing inner race are very high, become large because the reason of expanding with heat and contract with cold makes the axial dimension of rotating shaft, and the axial dimension of casing is substantially constant.Bearing is subject to the extruding of axial force, in the situation that run up, makes at short notice burn-out of bearing.

The tradition water cooled machine, for overcoming this difficult problem, only adopts bearing fit to reduce the magnitude of interference, strengthens bearing clearance.The ways such as bearing chamber and bearing outer ring loose fit and reserved end play prevent bearing damage.But these measures are greatly affected the stability of motor operation, and accidentally also can burn out a bearing.

Therefore, need especially a kind of interior ventilated machine, to solve problems of the prior art.

The utility model content

For overcoming above-mentioned technical deficiency, the purpose of this utility model be to provide cooling effect evenly, long service life, reliable water cooled machine.

For achieving the above object, the technical solution of the utility model is as follows:

A kind of water cooled machine, comprise stator core, cooling water spacer, rotor core, rotating shaft and the first cavity, uniform stator shaft orientation air channel on the circumference that described stator core contacts with the cooling water spacer, described rotor core is near uniform rotor axial air channel on the circumference of rotating shaft, the sheathed fan in position that in described rotating shaft, rotating shaft contacts with the first cavity.

In the utility model, described water cooled machine also comprises end cap, in described end cap, bearing chamber is set.

In the utility model, the outer wall of described water cooled machine bearing chamber arranges radiating ribs.

In the utility model, the quantity of described radiating ribs is more than two, and described plural radiating ribs is uniformly distributed centered by rotating shaft.

The utility model compared with the existing technology, has the following advantages and beneficial effect:

1, sheathed fan in rotating shaft, arrange axial ducts on stator core, rotor core, and rotor core can fully be contacted with the cooling water spacer by high velocity air, transfers heat to coolant;

Driving fan when 2, rotating shaft is rotated rotates, the high velocity air of circulation is constantly flowed, and the radiating condition of rotor core improves, thereby stator core, rotor core temperature rise difference are reduced greatly, the dimension chain of avoiding temperature contrast to cause changes, and guarantees the stable operation of motor;

3, because end cap does not adopt water-cooled, adopt the radiating ribs heat radiation, the temperature contrast of bearing enclose is greatly reduced, thereby improved useful life and the reliability service of bearing.

The accompanying drawing explanation

The structural representation of water-cooled machine in Fig. 1 prior art;

The Temperature Distribution block diagram at Fig. 2 tradition water-cooled machine each position of motor internal in the nominal load situation;

The structural representation of Fig. 3 the utility model water-cooled machine;

The structural representation of Fig. 4 the utility model stator core;

The structural representation of Fig. 5 the utility model rotor core;

The Temperature Distribution block diagram at Fig. 6 the utility model water-cooled machine each position of motor internal in the nominal load situation;

The structural representation in Fig. 7 the utility model stator shaft orientation air channel;

The column comparison diagram that Fig. 8 is traditional water-cooled machine and the utility model motor each position Temperature Distribution of motor internal in the nominal load situation.

Wherein: 1, rotating shaft; 2, rotor core; 21, rotor axial air channel; 3, stator core; 31, stator shaft orientation air channel; 4, motor cavity; 41, cooling water spacer; 42, the first cavity; 43, the second cavity; 5, stator winding; 6, fan; 7, end cap; 8, bearing chamber; 81, radiating ribs.

Embodiment

Below in conjunction with the accompanying drawing illustrated embodiment, the utility model is further described.

Embodiment

As shown in Fig. 3～6, Fig. 3 is the structural representation of the utility model water-cooled machine; Fig. 4 is the structural representation of the utility model stator core; Fig. 5 is the structural representation of the utility model rotor core; Fig. 6 is the Temperature Distribution block diagram at the utility model water-cooled machine each position of motor internal in the nominal load situation.

A kind of water cooled machine, comprise stator core 3, cooling water spacer 41, rotor core 2, rotating shaft 1 and the first cavity 42, the circumference uniform distribution that stator core 3 contacts with cooling water spacer 41 (uniform is the meaning be evenly arranged) stator shaft orientation air channel 31, rotor core 2 is near (the art personnel are known, there is gap between rotor core and stator core, therefore with " close " this word rotor core 2 and stator core 3 position relationships) uniform rotor axial air channel 21 on the circumference of rotating shaft 1, the sheathed fan 6 in position that in rotating shaft 1, rotating shaft 1 contacts with the first cavity 42, fan 6 is connected with rotor bar by rotor end ring.

Water cooled machine also comprises end cap 7, the interior bearing chamber 8 that arranges of end cap 7.

The outer wall of water cooled machine bearing chamber 8 arranges radiating ribs 81; The temperature contrast of bearing enclose is greatly reduced, improve bearing useful life and reliability service efficiency.

The quantity of radiating ribs 81 is more than two, and plural radiating ribs 81 is uniformly distributed centered by rotating shaft 1, reaches attractive in appearance, practical purpose.

The utility model course of work is as follows:

1, main shaft 1 work, fan 6 High Rotation Speeds that main shaft 1 drives in the first cavity, make the interior generation malleation of the first cavity 42, and the second cavity 43 produces negative pressure, by blast, makes distinguished and admirable flow at high speed;

2, distinguished and admirable through winding overhang, by absorbing heat, winding is lowered the temperature;

3, the distinguished and admirable process stator shaft orientation air channel 31 after the absorption heat, because stator shaft orientation air channel 31 contacts with cooling water spacer 41, so to the distinguished and admirable effect of playing cooling;

4, distinguished and admirable second cavity 43 that enters after the cooling, lowered the temperature to the interior winding overhang of the second cavity 43;

5, distinguished and admirable to after the cooling of the interior winding overhang of the second cavity 43, flow into the first cavitys 42 by rotor axial air channel 21; The blast that the first cavity gas 42 streams are produced by fan 6 again flows into the second cavity 43, with this, forms the air-flow of high-speed circulating.

The utility model can be for 55kw(2P) fire pump, salvage pump and 75kw(6P for warship) water cooled machine such as condensate pump.

In application example, the blast of circulation high velocity air is relevant with the rotating speed of rotor fan blade.The area of rotor air blade is relevant with the radiating effect of rotor bar, simultaneously relevant with the air quantity of circulating current.

Stator pack has contained stator core 3 and stator winding.The gross area in the gross area of the axial ducts on the stator cylindrical and rotor axial air channel 21 is relevant with the flow velocity of circulating current; The gross area is less, and windage is larger, and flow velocity is just slower; Otherwise the flowing velocity of circulating current is faster, effect is better.

As shown in Figure 7, Fig. 7 is the structural representation in the utility model stator shaft orientation air channel.

In figure, the size of A is unsuitable excessive, otherwise it is large to affect the close change of magnetic of stator core 3 yoke sections.B is oversize can affect the stator radiating effect.It is the cooling service of rotor that the cooling condition that the arc length ratio of adjusting B and L just can originally exclusively enjoy for stator core 3 divides certain ratio.B:L is larger, and stator temperature rise improves, and rotor temperature rise reduces.It is optimum value that suitable given B and the arc length ratio of L make the rotor temperature rise approach balance.

Referring to Fig. 8, the column comparison diagram that Fig. 8 is traditional water-cooled machine and the utility model motor each position Temperature Distribution of motor internal in the nominal load situation.

As shown in Figure 8, tradition water cooled machine stator core 3, rotor core 2 cooling conditions are widely different, cause the position temperature such as stator, casing very low, and rotor, rotating shaft and bearing inner race temperature are very high, become large because the reason of expanding with heat and contract with cold makes the axial dimension of rotating shaft, and the axial dimension of casing is substantially constant.Bearing is subject to the extruding of axial force, in the situation that run up, makes at short notice bearing burn out.Water cooled machine after the utility model improves, the part temperatures differences such as stator core 3, rotor core 2 and casing, bearing inner race, bearing outer ring are little, and motor is operated steadily, and product quality is well ensured.

The above-mentioned description to embodiment is can understand and use the utility model for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and General Principle described herein is applied in other embodiment and needn't passes through performing creative labour.Therefore, the utility model is not limited to above-described embodiment, and those skilled in the art are according to announcement of the present utility model, and not breaking away from the improvement that the utility model category makes and revise all should be within protection range of the present utility model.

Claims

1. a water cooled machine, comprise stator core, cooling water spacer, rotor core, rotating shaft and the first cavity, it is characterized in that: uniform stator shaft orientation air channel on the circumference that described stator core contacts with the cooling water spacer, described rotor core is near uniform rotor axial air channel on the circumference of rotating shaft, the sheathed fan in position that in described rotating shaft, rotating shaft contacts with the first cavity.

2. a kind of water cooled machine according to claim 1, it is characterized in that: described water cooled machine also comprises end cap, in described end cap, bearing chamber is set.

3. a kind of water cooled machine according to claim 2, it is characterized in that: the outer wall of described water cooled machine bearing chamber arranges radiating ribs.

4. a kind of water cooled machine according to claim 3, it is characterized in that: the quantity of described radiating ribs is more than two, described plural radiating ribs is uniformly distributed centered by rotating shaft.