CN203175968U

CN203175968U - Plastic air supply device

Info

Publication number: CN203175968U
Application number: CN 201320161276
Authority: CN
Inventors: 高文铭; 韩小红; 施建立
Original assignee: Ningbo Langdi Impeller Machinery Co Ltd
Current assignee: Ningbo Langdi Impeller Machinery Co Ltd
Priority date: 2013-04-02
Filing date: 2013-04-02
Publication date: 2013-09-04
Anticipated expiration: 2023-04-02

Abstract

The utility model relates to the field of ventilation equipment. A plastic air supply device comprises an annular blase base plate, a wheel hub, a flow deflecting ring and a plurality of blades, wherein the blades are fixedly arranged between the annular blade base plate and the flow deflecting ring; the blades are twisted from the air inlet end to the air outlet end; an upper air inlet angle and a lower air inlet angle are different and both are not greater than 10 degrees; an upper air outlet angle and a lower air outlet angle are different and are both between 20 degrees and 40 degrees; the outside diameter of the annular blade base plate is between 420mm and 480mm; the inside diameter size of the flow deflecting ring is 75-85 percent of the outside diameter size of the annular blade base plate; and the area of an air inlet between any adjacent blades is 66-75 percent of the area of a corresponding air outlet. The plastic air supply device has the advantages of novel structure, great air volume and low noise.

Description

The plastics blast device

Technical field

The utility model relates to the ventilation equipment field, relates in particular to the plastics blast device.

Background technique

The plastics blast device is product commonly used in the ventilation equipment field, the plastics blast device comprises ring leaf base plate, wheel hub, blade and baffle liner, vanes fixed is between ring leaf base plate and baffle liner, wheel hub and ring leaf base plate inboard are connected as a single entity, wheel hub is concentric with ring leaf base plate, the center at wheel hub top arranges axle sleeve, and motor shaft passes the axle sleeve upper shaft hole and drives the fan blade rotation during use.The usability of plastics blast device is mainly reflected in air quantity size and noise control aspect, air quantity size and noise just are mutual, the general big noise of air quantity is relatively just high, the little noise of air quantity is low naturally, the parameter that the usability of plastics blast device relates to is a lot, for example the shape of leaf base plate, wheel hub, blade and baffle liner, size and Placement etc.Very reasonably the plastics blast device is few in air quantity size and noise control in the market.

Summary of the invention

Goal of the invention of the present utility model is in order to enrich the kind of plastics blast device, to disclose a kind of novel structure, the plastics blast device that air quantity is big and noise is low.

In order to realize above-mentioned purpose, the utility model has adopted following technological scheme:

The plastics blast device, comprise ring leaf base plate, wheel hub, baffle liner and multi-disc blade, the multi-disc vanes fixed is between ring leaf base plate and baffle liner, wheel hub and ring leaf base plate inboard are connected as a single entity, blade air intake to outlet air end is distorted shape, the air intake angle of blade is divided into the following air intake angle near the last air intake angle of baffle liner and close ring leaf base plate, and last air intake angle is different with following air intake angle angle and all be not more than 10 °; The air-out angle of blade is divided near the last air-out angle of baffle liner with near ring leaf base plate following and goes out the air intake angle, last air-out angle and following air-out angle angle difference and all between 20 °-40 °; Ring leaf base plate external diameter is between 420mm-480mm, and the internal diameter size of baffle liner is the 75%-85% of ring leaf base plate outside dimension, and the air-admitting surface between the adjacent blades is the 66%-75% of the exhaust outlet area of correspondence arbitrarily.

As preferably, last air-out angle angle is less than air-out angle angle down, and goes up difference between air-out angle angle and the following air-out angle angle between 5 °-15 °; Arbitrarily the air-admitting surface between the adjacent blades is the 73%-73.5% of corresponding exhaust outlet area, and the noise unconspicuous situation that rises adds 2% air quantity down to reducing.

As preferably, last air intake angle is the air intake surface top end with the opposite tangent direction of fan blade sense of rotation and the angle of blade air intake surface top circular arc tangential line, and following air intake angle is place, air intake surface bottom with the opposite tangent direction of fan blade sense of rotation and the angle of blade air intake surface bottom circular arc tangential line; Last air-out angle is the outlet air surface top end with the opposite tangent direction of fan blade sense of rotation and the angle of blade outlet air surface top circular arc tangential line, and following air-out angle is place, outlet air surface bottom with the opposite tangent direction of fan blade sense of rotation and the angle of blade outlet air surface bottom circular arc tangential line.

As preferably, last air intake angle is 3 °, and following air intake angle is 4.3 °, and last air-out angle is 23 °, and following air-out angle is 34 °, and ring leaf base plate external diameter is 452.4mm, and the baffle liner internal diameter is 367.8mm, and air quantity maximum and noise are minimum.

Adopted the plastics blast device of above-mentioned technological scheme, blade air intake to outlet air end is distorted shape, last air intake angle is different with following air intake angle angle and all be not more than 10 °, last air-out angle and following air-out angle angle are different and all between 20 °-40 °, make the air-out of blade be linear change along the blade height direction, can effectively weaken the noise energy stack, reduce noise.Ring leaf base plate external diameter is between 420mm-480mm, the internal diameter size of baffle liner is the 75%-85% of ring leaf base plate outside dimension, air-admitting surface between the adjacent blades is the 66%-75% of the exhaust outlet area of correspondence arbitrarily, obtains good static pressure, and air intake efficiency improves 2% at least.The advantage of this plastics blast device is novel structure, and air quantity is big and noise is low.

Description of drawings

Fig. 1: the utility model embodiment's plastics blast device structural representation.

Fig. 2: the plastics blast device schematic representation one that baffle liner is not installed among the utility model embodiment.

Fig. 3: the plastics blast device schematic representation two that baffle liner is not installed among the utility model embodiment.

Embodiment

Embodiment below in conjunction with Fig. 1, Fig. 2 and the model utility of Fig. 3 makes a detailed explanation.

As Fig. 1, Fig. 2 and plastics blast device shown in Figure 3, mainly comprise the ring leaf base plate 1, wheel hub 2, baffle liner 4 and the multi-disc blade 3 that all have plastics to make, multi-disc blade 3 is fixed between ring leaf base plate 1 and the baffle liner 4, wheel hub 2 is connected as a single entity with ring leaf base plate 1 inboard, the axle sleeve that the center at wheel hub 2 tops is connected as a single entity with it, be useful on the axis hole that connects motor shaft on the axle sleeve, wheel hub 2 is provided with radiation hole.Ring leaf base plate 1 external diameter is between 420mm-480mm, and the internal diameter size of baffle liner 4 is 75%-85% of ring leaf base plate 1 outside dimension.

Blade 3 air intakes to outlet air end is distorted shape, the air intake angle of blade 3 is divided into the following air intake angle a2 near the last air intake angle a1 of baffle liner 4 and close ring leaf base plate 1, last air intake angle a1 is different with following air intake angle a2 angle and all be not more than 10 °, last air intake angle a1 is the air intake surface top end with the opposite tangent direction of fan blade sense of rotation and the angle of blade air intake surface top circular arc tangential line, and following air intake angle a2 is place, air intake surface bottom with the opposite tangent direction of fan blade sense of rotation and the angle of blade air intake surface bottom circular arc tangential line.The air-out angle of blade 3 is divided into the following air intake angle b2 of going out near the last air-out angle b1 of baffle liner 4 and close ring leaf base plate 1, last air-out angle b1 and following air-out angle b2 angle are different and all between 20 °-40 °, last air-out angle b1 angle is less than following air-out angle b2 angle, and the difference between last air-out angle b1 angle and the following air-out angle b2 angle is between 5 °-15 °, last air-out angle b1 is the outlet air surface top end with the opposite tangent direction of fan blade sense of rotation and the angle of blade outlet air surface top circular arc tangential line, and following air-out angle b2 is place, outlet air surface bottom with the opposite tangent direction of fan blade sense of rotation and the angle of blade outlet air surface bottom circular arc tangential line.Last air intake angle a1 is different with angle, following air intake angle a2 degree, and last air-out angle b1 is different with following air-out angle b2 angle, makes the air-out of blade 3 be linear change along the blade height direction, can effectively weaken the noise energy stack, reduces noise 2dB at least.Blade 3 generally is 5,7,8 or 9.

The direction rotation of arrow A indication when the plastics blast device uses such as among Fig. 2 and Fig. 3, air-admitting surface C between the adjacent blades 3 is the 73%-73.5% of the exhaust outlet area D of correspondence arbitrarily, can obtain best static pressure, last air intake angle is 3 °, and following air intake angle is 4.3 °, and last air-out angle is 23 °, following air-out angle is 34 °, ring leaf base plate 1 external diameter is 452.4mm, and baffle liner 4 internal diameters are 367.8mm, and air quantity maximum and noise are minimum.In the market similar its air quantity of plastics blast device of Dimensions generally be 2100 cubic metres per hour, noise generally is 47 decibels, its air quantity of plastics blast device that adopts above-mentioned parameter be 2200 cubic metres per hour, noise is 43 decibels, namely air quantity is big and noise is low.

Claims

1. plastics blast device, comprise ring leaf base plate, wheel hub, baffle liner and multi-disc blade, the multi-disc vanes fixed is between ring leaf base plate and baffle liner, wheel hub and ring leaf base plate inboard are connected as a single entity, it is characterized in that blade air intake to outlet air end is distorted shape, the air intake angle of blade is divided into the following air intake angle near the last air intake angle of baffle liner and close ring leaf base plate, and last air intake angle is different with following air intake angle angle and all be not more than 10 °; The air-out angle of blade is divided near the last air-out angle of baffle liner with near the following air-out angle of ring leaf base plate, last air-out angle and following air-out angle angle difference and all between 20 °-40 °; Ring leaf base plate external diameter is between 420mm-480mm, and the internal diameter size of baffle liner is the 75%-85% of ring leaf base plate outside dimension, and the air-admitting surface between the adjacent blades is the 66%-75% of the exhaust outlet area of correspondence arbitrarily.

2. plastics blast device according to claim 1 it is characterized in that air-out angle angle less than following air-out angle angle, and the difference between last air-out angle angle and the following air-out angle angle is between 5 °-15 °; Air-admitting surface between the adjacent blades is the 73%-73.5% of the exhaust outlet area of correspondence arbitrarily.

3. plastics blast device according to claim 1, it is characterized in that the air intake angle is the air intake surface top end with the opposite tangent direction of fan blade sense of rotation and the angle of blade air intake surface top circular arc tangential line, following air intake angle is place, air intake surface bottom with the opposite tangent direction of fan blade sense of rotation and the angle of blade air intake surface bottom circular arc tangential line; Last air-out angle is the outlet air surface top end with the opposite tangent direction of fan blade sense of rotation and the angle of blade outlet air surface top circular arc tangential line, and following air-out angle is place, outlet air surface bottom with the opposite tangent direction of fan blade sense of rotation and the angle of blade outlet air surface bottom circular arc tangential line.

4. plastics blast device according to claim 1 is characterized in that the air intake angle is 3 °, and following air intake angle is 4.3 °, and last air-out angle is 23 °, and following air-out angle is 34 °, and ring leaf base plate external diameter is 452.4mm, and the baffle liner internal diameter is 367.8mm.