CN2280164Y

CN2280164Y - Energy saving centrifugal electric fan

Info

Publication number: CN2280164Y
Application number: CN 96228028
Authority: CN
Inventors: 卢传智
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-06
Filing date: 1996-06-06
Publication date: 1998-04-29
Anticipated expiration: 2006-06-06

Abstract

The utility model belongs to the blower field and relates to an energy-saving centrifugal blower. The utility model is composed of a machine casing, an impeller, a collector and a driving member. The utility model is additionally provided with an air opening retainer ring in a matching position of a sheath opening of the impeller on the collector; straight through clearance leakage is changed into zigzag clearance leakage, the inner leakage resistance of air is improved, the sealing condition of the blower is improved, and the work efficiency of the blower is improved. When the technology is used, the technology is easy and practical, the cost is low, and electricity-saving and energy-saving effects are obvious.

Description

Can centrifugal blower

The utility model belongs to the blower fan field, refers in particular to centrifugal energy-saving fan.

Blower fan is a kind of application universal machine very widely, also is one of big equipment of power consumption.Traditional centrifugal blower structure is by slip ring, formations such as impeller, casing and transmission part.In order to guarantee the normal rotation of centrifugal blower fan blade wheel, to leave certain interval between shrouding disc and the slip ring before the impeller.The structure that old-fashioned centrifugal blower constitutes the gap is the counterpart formula, and its gap is axial; Gas leakage leads directly between zone of high pressure and the negative pressuren zone.During work, because the interior gas pressure of casing is higher than the pressure at impeller inlet place, under the condition of pressure reduction, the high pressure air in the housing is back to impeller inlet again after sewing through axial clearance, and formation circulates.Because reflux gas is a pressurized gas, this circulating consumed energy, caused interior leadkage loss.Simultaneously, this reflow stream of sewing gas has increased intake resistance to perpendicular to the air flow direction that enters impeller.Therefore, the sealing effect of this axial clearance is bigger to the working efficiency influence of blower fan, and in order to improve the working efficiency of blower fan, the fit form of centrifugal blower fan blade wheel and casing adopts the radial clearance of running-on formula more for a long time.The reflow stream that this pattern has changed gas leakage to, increased the gas leakage hermetic resistance, improved the working efficiency of blower fan.Sew because this structure remains straight-through, the gas backstreaming resistance is limited, and the interior leadkage loss of this form is still bigger.

The purpose of this utility model is that a kind of resistance of sewing of invention is big, the impeller sealing structure of good sealing effect, the energy-efficient effect of realization centrifugal blower.

Basic design of the present utility model is on the slip ring of centrifugal blower, and the position that cooperates with the impeller running-on adds an air port ring washer, constitutes new sealing configuration, becomes the novel energy-conserving blower fan.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the enlarged diagram of Figure 1A.

Reference character:

[1] centrifugal blower casing, [2] impeller, [3] slip ring, [4] transmission part, [5] air port back-up ring.

It is as follows to be described in detail by reference to the accompanying drawings structure:

Air port back-up ring [5] is made with the ordinary construction steel plate, thickness 3-10mm, with the welding or Bonding way is fixed on the current collector. Its diameter should be greater than impeller [2] protecgulum running-on diameter 1mm-8mm. Clearance control between air port back-up ring [5] and the impeller [2] is not contacted Minimum clearance, the axial movement value during vane rotary just, the size by blower fan increases again The gap that adds 0.3-2mm.

This model utility is changed into labyrinth gap with the straight-through clearance leakage of centrifugal blower inside and is sewed, and has increased and has sewed resistance in the gas, has improved the air-proof condition of blower fan, has improved the working efficiency of blower fan.Implement this technology, simple for process, economize on electricity, energy-saving effect is obvious.

Embodiment:

Transform a G4-7311NO28Q blower fan, go up the last air port back-up ring of position welding that cooperates with the impeller running-on at the slip ring [3] of blower fan.Air port back-up ring [5] is made with the thick steel plate of 5mm, and its diameter is than the big 3mm of impeller running-on maximum diameter, and the gap of air port back-up ring [5] and impeller set front-end face is that the maximum shifting amount of impeller [2] adds 0.3mm, and impeller [2] is installed in the engine housing.During work, power carries out work by transmission part [4] impeller [2].At first passing through the warp spacers b that is formed by air port back-up ring [5] and impeller running-on end face when pressurized gas pass clearance leakage turns a direction again and passes through axial clearance B and release blower fan by the slip ring mouth.The whole process resistance of sewing increases, and has reduced leadkage loss.Fan efficiency after improving after tested improves 10%.

Claims

1, energy-saving centrifugal blower fan is to be made of casing [1], impeller [2], slip ring [3], driving component [4], it is characterized in that going up and impeller running-on cooperation position adds air port back-up ring [5] at slip ring [3].

2, energy-saving centrifugal blower fan according to claim 1 is characterized in that air port back-up ring [5] is fixed on the slip ring [3].