CN102778030A

CN102778030A - Energy-saving air heater

Info

Publication number: CN102778030A
Application number: CN2012102303796A
Authority: CN
Inventors: 李松生; 鲁豫鑫; 董玛莉
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2012-07-05
Filing date: 2012-07-05
Publication date: 2012-11-14
Anticipated expiration: 2032-07-05
Also published as: CN102778030B

Abstract

The invention relates to an energy-saving hot air blower, which comprises an air chamber front cover, an impeller, an air chamber rear cover, an air inlet, a rotating shaft, a motor stator, a motor rotor, a front support bearing, a front bearing seat, a rear support bearing, and a rear bearing Seat, motor housing with spiral heat sink, outer wind cover with air inlet, air inlet, secondary heating device, air outlet channel and air outlet. When working, the motor shaft drives the impeller to rotate at a high speed, forming a negative pressure at the air inlet of the air chamber, and the external air is sucked in from the air inlet at the rear of the outer wind cover, and when passing through the spiral air duct, it meets the spiral air on the motor shell. The surface of the heat sink is contacted for heat exchange; the preheated air is reheated by the heating system to reach the required temperature, and then it is output from the air outlet channel. The invention not only realizes the cooling of the driving motor when the fan is working, but also fully utilizes the calorific value of the stator and other parts of the driving motor to preheat the air entering the fan, thereby achieving the purpose of energy saving.

Description

A kind of energy-conservation air-heater

Technical field

The present invention relates to the industrial heat blower fan in a kind of electromechanical engineering field, is a kind of energy-saving high speed air-heater.

Background technology

Air-heater is the first-selected product of modern industry thermal source upgrading, is the optimal heat wind regime configuration of various machineries such as hot blast furnace conveyor, drying oven, baking oven, packaging machine.It is generally pressurizeed to air by the motor-driven impeller, and after heating the temperature that reaches required through heater, the hot blast of output high pressure.The drive motors of air-heater can produce suitable heat when working; Traditional type of cooling is to dry through rear-mounted aerofoil fan; The pressure air that flows during through motor housing and the fin surface on the shell carry out heat exchange and take away heat, be dispersed at last in the atmosphere, like this; Although realized the purpose of cooling motor, this part heat has slatterned fully.

Therefore, how to make full use of this part heat, make it to become the useful energy, just become a problem demanding prompt solution.

Summary of the invention

The present invention is exactly in air-heater, utilizes the heat of cooling motor stator and bearing to come to realize preheating for the air that gets into blower fan, when realizing motor etc. cooled off, has reached energy-conservation purpose.

To achieve these goals, the present invention adopts following technical scheme:

A kind of energy-saving air-heater, it partly is made up of drive system, blower system, preheating air inlet system and post bake system etc.Wherein drive system comprises drive motors stator and rotor, rotating shaft, front and back block bearing, antero posterior axis bearing and electric machine casing etc. again, and blower system comprises air compartment protecgulum, impeller and air compartment bonnet, air inlet and air outlet etc. again; The preheating air inlet system comprises the air inlet of electric machine casing, outer fan housing and the blower fan rear end of band spiral heat dissipation sheet; The post bake system comprises heater and air-out passage etc.

Above-mentioned energy-saving air-heater adopts high-speed electric expreess locomotive to drive, and drive motors stator and rotor are separately fixed in electric machine casing and the rotating shaft, and the rotating shaft of motor is supported by forward and backward bearing group, and forward and backward bearing group is respectively the angular contact ball bearing of two cover configured in parallel and forms.

Above-mentioned energy-saving air-heater, there is spiral fin in the outside of its electric machine casing, constitutes spiral duct with outer fan housing, and communicates with air inlet on the blower system air compartment bonnet.

During work, the air inlet place that the machine shaft impeller is rotated in air compartment at a high speed forms negative pressure, and extraneous air is sucked by the air inlet from outer fan housing rear portion, during through the spirality air channel with electric machine casing on surperficial contact of spiral heat dissipation sheet carry out heat exchange; Since drive motors when work motor stator and block bearing all can produce a part of heat and pass to electric machine casing, antero posterior axis bearing; Flow air is just come cooling motor stator and bearing through heat exchange cooling motor housing in the air channel, obtains preheating simultaneously; After air after the preheating is inhaled into the air compartment of blower fan blower system from the air compartment air inlet, drive is formed high pressure and arrive the air outlet on the air compartment protecgulum, carry out post bake through heating system again and reach temperature required back and export by the air-out passage by impeller.The present invention makes blower fan when work, both realize the cooling to drive motors, and the caloric value that makes full use of positions such as drive motors stator is again carried out preheating to the air that gets in the blower fan, has reached energy-conservation purpose.

The present invention has following outstanding substantial characteristics and marked improvement compared with prior art:

(1) negative pressure of utilizing the air compartment air inlet is as power; The helical channel that utilizes electric machine casing and outer fan housing composition is as ventilating duct; With the interface of the spirality fin on the electric machine casing outside as heat exchange; Get into the inner air of ventilating duct as cooling media, make extraneous air force to get into ventilating duct inside motor etc. is cooled off;

(2) utilize the heat that motor and front and back bearings produced that the air that gets into the ventilating duct internal flow is carried out preheating, and as the air inlet of blower fan, the energy that need expend when making it to be heated to predetermined temperature reduce greatly, has obvious energy-saving advantages.

Description of drawings

Fig. 1 is the structural representation of energy-saving type hot air machine among the present invention.

Fig. 2 is the flow path sketch map of air of the present invention in motor housing and blower fan.

The specific embodiment

The preferred embodiments of the present invention accompanying drawings is following:

Embodiment one:

Referring to Fig. 1; The air-heater that this is energy-conservation comprises air compartment protecgulum 1, impeller 2, rotating shaft 3, air compartment bonnet 4, air inlet 5, front-end bearing pedestal 6, fore bearing 7, electric machine casing 8, rotor 9, motor stator 10, outer fan housing 11, lasso 12, rear bearing 13, rear bearing block 14, back end cover for motor 15, air inlet 16, air-out passage 17, heater 18 and air outlet 19.

Said rotor 9 holds 13 supportings by preceding block bearing 7 and rear trunnion; The peripheral suit exogenous wind cover of electric machine casing; Motor stator 10 directly is fixedly connected with electric machine casing 8; Rotor 9 directly is fixed in the rotating shaft 3, rotating shaft 3 two ends be the angular contact ball bearing of two groups of configured in parallel as forward and backward block bearing

group

7 and 13, forward and backward bearing group is installed in front-end bearing pedestal 6 and rear bearing block 14 inside respectively.

There is spiral fin in the outside of the electric machine casing 8 of above-mentioned blower fan, forms spiral helicine ventilating duct with outer fan housing 11.

Embodiment two:

Present embodiment and embodiment one are basic identical, and special feature is:

Said blower fan protecgulum 1 has said air outlet 19, in air outlet 19 outsides said second heating apparatus 18 is installed, and outer fan housing 11 rearward end have air inlet 16, and said air inlet 5 is arranged on the air compartment bonnet 4 of blower fan, is communicated with the two ends in said helical form air channel respectively.

Referring to Fig. 2; The drive motors impeller is rotation at a high speed in air compartment; Air inlet 5 places at air compartment form negative pressure, and extraneous air is by air inlet 15 suctions of blower fan from outer fan housing 11 rears, the spiral duct inside of flowing through; The spirality fin surface has enough contacts area and flow air to carry out heat exchange with cooling motor housing 8, and then cooling motor stator 10, bearing 7 and 13; It simultaneously also is a warm before getting in the air compartment to air; Air after the preheating sucks air compartment inside from the air inlet 5 on the air compartment bonnet 4; Quilt arrives the air outlet 19 on the air compartment protecgulum after impeller 2 drives of rotation become malleation at a high speed; After carrying out post bake through heater 18 again, reach temperature required by 17 outputs of air-out passage.

Claims

1. An energy-saving hot air blower, including the front cover of the air chamber (1), the impeller (2), the rear cover of the air chamber (4), the air inlet (5), the rotating shaft (3), the motor stator (10), the motor Rotor (9), front support bearing (7), front bearing seat (6), rear support bearing (13), rear bearing seat (14), motor housing with spiral fins (8), with air inlet The outer wind cover (11), air inlet (16), secondary heating device (18), air outlet channel (17) and air outlet (19), characterized in that the motor rotor (9) is supported by the front bearing (7) and the support of the rear support bearing (13), the outer wind cover (11) is set on the periphery of the motor housing (8), and the outer ring of the motor stator (10), the front support bearing (7) and the rear support bearing (13) Direct contact, so that the heat generated by the motor stator (10), support bearings (7, 13) etc. is easily transferred to the motor housing (8) through conduction, and there are spiral heat sinks on the outside of the motor housing (8) Together with the outer wind cover (11), a spiral air duct is formed.

2. The energy-saving hot air blower according to claim 1, characterized in that there is an air inlet (16) at the rear end of the outer wind cover (11), and the air chamber rear cover (4) of the fan has the The air inlet (5) is respectively connected to the two ends of the spiral air passage, the air outlet (19) is provided on the front cover (1) of the air chamber, and the secondary heating is installed outside the air outlet (19) device (18); the air can be sucked into the spiral air duct, and in the air duct, it can fully contact the surface of the spiral heat sink on the outside of the motor casing (8) to realize heat exchange, cooling the motor stator (10) and the bearing (7, 13) at the same time, the air is preheated; the preheated air enters the interior of the air chamber from the air inlet (5) on the rear cover of the air chamber through the spiral air duct, and then is driven by the high-speed rotating impeller (2) The positive pressure is formed to reach the air outlet (19) on the front cover of the air chamber, and then heated by the secondary heating device (18) to become hot air and output from the air outlet channel (17).