CN2114917U

CN2114917U - Out cooling fan for motor

Info

Publication number: CN2114917U
Application number: CN 91222798
Authority: CN
Inventors: 徐树勋
Original assignee: Liang Xizhi
Current assignee: Liang Xizhi
Priority date: 1991-12-11
Filing date: 1991-12-11
Publication date: 1992-09-02

Abstract

The utility model relates to a novel out cooling fan for a motor, belonging to machine manufacture field, which mainly comprises fan blades, wheel discs, wheels, flow guiding rings, a rotating diffusion pipe, a locating shaft hole, and a key. The molding of the novel out cooling fan for a motor can be made by once injection mold. The utility model is characterized in that the blade roots L of fan blades A and B are connected with the wheel discs [1-3] of hubs [1-9], and the blade top parts K of blades A and B are connected with the flow guiding rings [1-4]. The fan blades A and B, wheel discs and flow guiding rings form an air flowing channel. The rotating diffusion pipe is positioned on the outlet of the air flowing channel. The fan blades A and B have the different blade shapes. The fan blades are distributed with unequal grid pitches. The fan has advantages of high efficiency, low noise, and low mechanical loss.

Description

Out cooling fan for motor

The novel outer thermantidote of motor is used for mechanical manufacturing field.

Known a kind of motor cooling fan is by engineering plastics single injection-molded or lead alloy manufacturing.See accompanying drawing 3 and 4, Fig. 3 analyses and observe for the B-B of Fig. 4, and Fig. 4 is that the B of Fig. 3 is to view.Fan blade is arranged on the impeller disk, and there is axis hole at the impeller center, is used for fan is contained in rotating shaft, and shaft hole inner wall has positioning key, is used for fixing the mutual alignment between fan and the rotating shaft.Blade shape is identical, and arranges along pitch such as circumference.This fan has certain cooling effect, but this fan efficiency is on the low side, and rotational noise is bigger.

The purpose of this utility model provides a kind of novel outer thermantidote of motor of high-efficient low-noise.It not only can reduce the mechanical loss of motor, and can reduce the noise of motor.Its manufacturing process is simple, the novel outer thermantidote of a kind of motor that production cost is low.

The outer thermantidote of the utility model motor is achieved in that to see below referring to accompanying drawing 1 and 2(description of drawings and states).Use the engineering plastics single injection-molded.The novel outer thermantidote of its motor is mainly by the electric wind flabellum, wheel disc, wheel hub, guide ring, rotary diffusing pipe and positioning shaft hole and key are formed, it can be fixed on the motor shaft, it is characterized in that the L of blade root portion of fan blade A and B links to each other with wheel disc (1-3) on the wheel hub (1-9), the leaf top K of fan blade A and B links to each other with guide ring (1-4), electric fan blade A and B and wheel disc (1-3) and guide ring (1-4) have constituted the runner of air current flow, at runner exit rotary diffusing pipe I is arranged, the blade shape of adjacent fans blade A and B is different, and whole blades are pressed along the circumference of impeller direction and do not waited pitch to arrange on the fan.Because it is multiple that the specification of fan has, so pitch t and t ₁Also there is corresponding multiple angles to match with it.

Because the top has guide ring to compare with known fan outside blade A and B, reduced the air loss at blade tip place, prevented that the vane tip air-flow from sewing the vortex of formation and the reflux fluid destruction to the fan inlet flow field, thereby improved the efficient of fan work, reduce the aerodynamic noise and the vibration of fan, alleviated the load of motor bearings, thereby reduced mechanical loss and prolonged working life.The rotary diffusing pipe at fan airstream runner exit place can further improve the static pressure at fan outlet place, reduces the flow velocity at fan outlet place, and these measures can both further improve fan efficiency, reduces fan noise.Blade does not wait pitch to arrange and the shape difference of adjacent blades along circumference of impeller, and that can reduce fan effectively disturbs people's noise.

The utility model characteristics: from as can be known above-mentioned, the utility model 1 has been compared fan work efficient height, the advantage that noise is low with known fan; Secondly, because single injection-molded, low cost of manufacture, technology is simple, and production efficiency height, cost are low, in light weight; Fan can rotate by positive and negative both direction; The mechanical loss of fan is few.

Description of drawings: see accompanying drawing 1,2,3,4.Fig. 1 is that the A-A of Fig. 2 analyses and observe, with difformity and the fan structure characteristics schematic diagram of main explanation flabellum A and B.Fig. 2 Fig. 1 illustrates that mainly flabellum A and B arrange in a circumferential direction and the structural representation of rotary diffusing pipe.Fig. 3 is that the B-B of Fig. 4 of known fan analyses and observe, with the schematic diagram of explanation flabellum shape.Fig. 4 be the B of Fig. 3 to view, the schematic diagram of arranging in a circumferential direction with the explanation flabellum.(1-1) is fan blade A, (1-2) is fan blade B, for constituting the wheel disc of rotary diffusing pipe, it links to each other with wheel hub (1-9) (1-3), links to each other with the root of fan leaf A and B outside it, (1-4) is guide ring, it links to each other with the top of blade A and B, (1-5) technology groove, (1-6) axis hole, (1-7) positioning key, the hole is used in (1-8) dismounting.

Embodiment: see accompanying drawing 1,2.But the novel outer thermantidote 1 engineering plastics single injection-molded of the motor of rotating.It has adopted open type centrifugal impeller optimal design and has been determined the method for blade optimal parameter by known mass flow and pressure.Concrete structure is as follows: there is an axis hole (1-6) at wheel hub (1-9) center, a positioning key (1-7) is arranged on the shaft hole inner wall face, on the wheel external cylindrical surface sheave surface (1-3) that can constitute the rotary diffusing pipe is arranged, fans A and B arrange from the wheel disc outward radial, the L of blade root portion that is blade A and B links to each other with wheel disc, the leaf top K of blade A and B links to each other with guide ring (1-4), by fan blade A and B, wheel disc, guide ring has constituted the runner of air current flow, form the rotary diffusing pipe at runner exit, the fan leaf shape of adjacent fans blade A and B is different, and whole fan blade are pressed along the circumference of impeller direction and do not waited pitch to arrange on the fan.See Fig. 1 (A-A analyses and observe).Import department's shape of fan blade A is made up of a straightway a and a tune b, the exit shape of blade A is made up of a straightway f and a curved section n, and import department's shape of fan blade B is made up of a straightway e and a curved section m the exit shape of a curved section c, blade B.

T has represented the pitch of a kind of position between fan blade A and the B, t ₁Represented the pitch of a kind of position between blade B and the A, t is not equal to t ₁, so just form on the fan all blades along the wheel disc circumference by not waiting pitch to arrange.

Present embodiment is compared with known fan, and aerodynamic noise has reduced by 2 to 5dB, and operating efficiency has improved 30～40%, and mechanical loss has reduced about 18%.

Claims

1, the novel outer thermantidote of motor is made up of fans, wheel disc, wheel hub, guide ring, rotary diffusing pipe and is fixed on the motor shaft with positioning shaft hole and key, but single injection-molded, it is characterized in that the L of blade root portion of fan blade A and B links to each other with wheel disc [1-3] on the wheel hub [1-9], the leaf top K of fan blade A and B links to each other with guide ring [1-4], constituted the runner of air current flow by fan blade A and B and wheel disc [1-3] and guide ring [1-4], rotary diffusing pipe (I) has been arranged in its exit.The blade shape of adjacent fans blade A and B is different, and the whole blades of fan do not wait pitch to arrange along the circumference of impeller direction.

2, the novel outer thermantidote of motor as claimed in claim 1, the import department's shape that it is characterized in that fan blade A is made up of a straightway a and a tune b, the exit shape of blade A is made up of a straightway f and a curved section n, the import department of fan blade B is shaped as a curved section c, and the shape in the exit of blade B is made up of a straightway e and a curved section m.