CN203175973U

CN203175973U - Backward-style impeller

Info

Publication number: CN203175973U
Application number: CN 201320162515
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: 2013-04-03
Filing date: 2013-04-03
Publication date: 2013-09-04
Anticipated expiration: 2023-04-03

Abstract

The utility model relates to the field of ventilating devices. A backward-style impeller comprises an annular blade base plate, a hub, blades and a flow deflecting ring, wherein a cylindrical plastic shaft hole sleeve connected with the hub into a whole is arranged on a top part of the hub; nine blades are arranged; a part from an air inlet end to an air outlet end of each blade is in a twisted shape; an air inlet angle of each blade is divided into an upper air inlet angle close to the flow deflecting ring and a lower air inlet angle close to the annular blade base plate; an air outlet angle of each blade is divided into an upper air outlet angle close to the flow deflecting ring and a lower air outlet angle close to the annular blade base plate; an upper part of each blade is formed by a connecting region and a non-connecting region which are connected into a whole; and an air inlet area between any two adjacent blades is 70 percent to 75 percent of a corresponding air outlet area. The backward-style impeller has the advantages of novel structure, large air volume and low noise.

Description

Backswept impeller

Technical field

The utility model relates to the ventilation equipment field, relates in particular to a kind of impeller.

Background technique

Backswept impeller is the vitals in the air-conditioning, backswept impeller 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 rotation of axle sleeve upper shaft hole impeller during use.The usability of backswept impeller 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 backswept impeller 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 backswept impeller 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 impeller, to disclose a kind of novel structure, the backswept impeller that air quantity is big and noise is low.

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

Backswept impeller, comprise ring leaf base plate, wheel hub, blade and baffle liner, vanes fixed is between ring leaf base plate and baffle liner, the material-saving die cavity is set in the blade, wheel hub and ring leaf base plate inboard are connected as a single entity, wheel hub is concentric with ring leaf base plate, the top of wheel hub is provided with the cylindrical plastic shaft hole sleeve that is connected as a single entity with it, wheel hub is provided with a plurality of radiation holes, blade is 9, and blade air intake to outlet air end is distorted shape, and 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, last air intake angle and following air intake angle angle all are not more than 10 °, and the difference of last air intake angle and following air intake angle angle is within 3 °; The air-out angle of blade is divided into the following air-out angle near the last air-out angle of baffle liner and close ring leaf base plate, and all between 25 °-35 °, the difference of last air-out angle angle and following air-out angle angle is within 5 ° for last air-out angle and following air-out angle; All the inner and outer ends that are arranged in the blade on the ring leaf base plate form circle and blade cylindrical in the blade respectively, and diameter of a circle is the diameter 70%-76% of blade cylindrical in the blade; Blade top is made of the connection area that is connected as a single entity and disconnected district, connection area and the baffle liner of blade are fixed by ultrasonic welding, disconnected district is in the air intake direction of blade inboard, and the connection area is in the outside in disconnected district, and connection area length accounts for the 50%-60% of vane tip length; The tie point in connection area and disconnected district is that the highest point of blade is the summit, and the height of outboard end is the 85%-95% of blade apex height in the blade; Air-admitting surface between the adjacent blades is the 70%-75% of the exhaust outlet area of correspondence arbitrarily; Hub height is the 63%-72% of impeller sidepiece height, and described impeller sidepiece height is the whole height of ring leaf base plate, blade and baffle liner.

As preferably, the air-admitting surface between the adjacent blades is the 73%-74% of corresponding exhaust outlet area arbitrarily, obtains best static pressure, and air intake efficiency improves 4% at least; The length of material-saving die cavity is the 45%-55% of length of blade; Circular diameter is the 45%-55% of outside diameter in the described ring leaf base plate, and ring leaf base plate outside diameter is between 500mm-550mm; The height of baffle liner is identical with the baffle liner width dimensions; The height of baffle liner is the 45%-55% of blade exhaust outlet height, and the guide face on the baffle liner is arc shaped surface, adopts above-mentioned preference data to increase by 2% air quantity at least and noise rises not obvious.

As preferably, last air intake angle is 3 °, and following air intake angle is 2 °, and last air-out angle is 30 °, and following air-out angle is 31 °; Circular diameter is 388.5.6mm in the blade, and the blade outside diameter is 520mm; The thickness size of blade is no more than 19mm; Connection area length is 83.4mm, and length of blade is 154.4mm, and vane tip length is 154.4mm; The height 113.5mm of blade outboard end, the height of blade medial extremity is 112.9mm, the height of the tie point in connection area and disconnected district is 124.9mm; The length of material-saving die cavity is 74.1mm, and the widest position of blade is 16.8mm, and the widest position of material-saving die cavity is 9.5mm; Circular diameter is 274.3mm in the ring leaf base plate, and ring leaf base plate outside diameter is 520mm, and the bottom of blade outboard end is concordant with ring leaf plate outer side limit, and hub height is 115.8mm, and impeller sidepiece height is 171.7mm; The height of baffle liner is 55.2mm, and the height of blade exhaust outlet is 113.5mm.Utilization efficiency is best, and air quantity maximum and noise are minimum.

As preferably, described radiation hole is 5, the arrangements of 5 equidistant rules of radiation hole.

As preferably, stiffener is projection, and described auxiliary stiffener is groove.

As preferably, stiffener is groove, and described auxiliary stiffener is projection.

Adopted the backswept impeller of above-mentioned technological scheme, blade is 9, blade air intake to outlet air end is distorted shape, last air intake angle and following air intake angle angle all are not more than 10 °, last air-out angle and following air-out angle all on blade between 25 °-35 ° the air intake angle different with following air intake angle angle and differ very little, the difference of angle is within 3 °, last air-out angle is different with following air-out angle angle and differ very little, the difference of angle is within 5 °, make the turnover wind of blade be linear change along the blade height direction, and the trend that changes is steady, can effectively weaken the noise energy stack, and noise can reduce 3dB at least.Disconnected district is in the air intake direction of blade inboard, increases incoming air area, and air quantity increases.Connection area length accounts for the 50%-60% of vane tip length, can guarantee the bulk strength of impeller, can promote air quantity again.The height of outboard end is the 85%-95% of blade apex height in the blade, and turnover wind angle changes mild, and hub height is the 63%-72% of impeller sidepiece height, increases by 1% air quantity at least.Air-admitting surface between the adjacent blades is the 70%-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 backswept impeller is novel structure, and air quantity is big and noise is low.

Description of drawings

Fig. 1: the structural representation of the utility model embodiment's backswept impeller.

Fig. 2: the schematic representation of the bottom surface of the utility model embodiment's backswept impeller.

Fig. 3: the backswept impeller side schematic view that baffle liner is not installed among the utility model embodiment.

Fig. 4: the backswept impeller plan view that baffle liner is not installed among the utility model embodiment.

Embodiment

Below in conjunction with Fig. 1, Fig. 2, Fig. 3 and Fig. 4 embodiment of the present utility model is made a detailed explanation.

Backswept impeller as shown in Figure 1, Figure 2, Figure 3 and Figure 4, comprise ring leaf base plate 1, wheel hub 2, blade 3 and baffle liner 4, blade 3 is fixed between ring leaf base plate 1 and the baffle liner 4, material-saving die cavity 31 is set in the blade 3, wheel hub 2 is connected as a single entity with ring leaf base plate 1 inboard, wheel hub 2 is concentric with ring leaf base plate 1, the top of wheel hub 2 is provided with the cylindrical plastic shaft hole sleeve 5 that is connected as a single entity with it, wheel hub 2 is provided with the arrangement of 21,5 radiation holes 21 of 5 radiation holes equidistant rule centered by cylindrical plastic shaft hole sleeve 5.

Blade 3 is 9, 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 and following air intake angle a2 angle all are not more than 10 °, and the difference of last air intake angle a1 and following air intake angle a2 angle is within 3 °.The air-out angle of blade is divided into the following air-out angle b2 near the last air-out angle b1 of baffle liner 4 and close ring leaf base plate 1, and all between 25 °-35 °, the difference of last air-out angle b1 angle and following air-out angle b2 angle is within 5 ° for last air-out angle b1 and following air-out angle b2.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.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.The last air intake angle a1 of blade is different with following air intake angle a2 angle and differ very little, the difference of angle is within 3 °, last air-out angle b1 is different with following air-out angle b2 angle and differ very little, the difference of angle is within 5 °, make the turnover wind of blade 3 be linear change along the blade height direction, and the trend that changes is steady, can effectively weaken the noise energy stack, and noise can reduce 3dB at least.

Blade 3 tops are made of the connection area 32 that is connected as a single entity and disconnected district 33, the connection area 32 of blade and baffle liner 4 are fixed by ultrasonic welding, disconnected district 33 is in the air intake direction of blade 3 inboards, connection area 32 is in the outside in disconnected district 33, connection area 32 length account for the 50%-60% of blade 3 top length, the tie point in connection area 32 and disconnected district 33 is that the highest point of blade 3 is the summit, and the height of outboard end is the 85%-95% of blade 3 apex height in the blade 3.All the inner and outer ends that are arranged in the blade on the ring leaf base plate 1 form circle and blade cylindrical in the blade respectively, diameter of a circle is the diameter 70%-76% of blade cylindrical in the blade, wheel hub 2 highly is the 63%-72% of impeller sidepiece height, described impeller sidepiece height is the whole height after ring leaf base plate 1, blade 3 and baffle liner 4 assemblings are finished, at least increase by 2% incoming air area, namely increase by 2% air quantity at least.The length of material-saving die cavity 31 is 45%-55% of blade 3 length.Circular diameter is the 45%-55% of outside diameter in the ring leaf base plate 1, ring leaf base plate 1 outside diameter is between 500mm-550mm, the height of baffle liner 4 is identical with baffle liner 4 width dimensions, the height of baffle liner 4 is 45%-55% of blade exhaust outlet height, guide face on the baffle liner 4 is arc shaped surface, adopts above-mentioned preference data to increase by 2% air quantity at least and noise rises not obvious.

Air-admitting surface between the adjacent blades 3 is the 70%-75% of the exhaust outlet area of correspondence arbitrarily, and the air-admitting surface between the adjacent blades 3 is the 73%-74% of the exhaust outlet area of correspondence arbitrarily, can obtain best static pressure, and air intake efficiency improves 4% at least.

32 places, connection area are provided with stiffener, and baffle liner 4 is provided with the auxiliary stiffener with stiffener position and structure matching.Stiffener is projection, the groove that auxiliary stiffener is and projection mates, and in like manner, stiffener also can be groove, auxiliary stiffener is the projection that mates with groove.

The parameter of above-mentioned backswept impeller the best is as follows, and last air intake angle a1 is 3 °, and following air intake angle a2 is 2 °, and last air-out angle b1 is 30 °, and following air-out angle b2 is 31 °.Circular diameter is 388.5.6mm in the blade, and the blade outside diameter is 520mm, and the thickness size of blade 3 is no more than 19mm.Connection area 32 length are 83.4mm, blade 3 length are 154.4mm, blade 3 top length are 154.4mm, the height 113.5mm of blade outboard end, the height of blade medial extremity is 112.9mm, and the height of the tie point in connection area 32 and disconnected district 33 is 124.9mm, and the length of material-saving die cavity 31 is 74.1mm, the widest position of blade 3 is 16.8mm, and the widest position of material-saving die cavity 31 is 9.5mm.Circular diameter is 274.3mm in the ring leaf base plate 1, ring leaf base plate 1 outside diameter is 520mm, the bottom of blade 3 outboard ends is concordant with ring leaf base plate 1 outer side, wheel hub 2 highly is 115.8mm, impeller sidepiece height is 171.7mm, the height of baffle liner 4 is 55.2mm, and the height of blade exhaust outlet is 113.5mm.

Adopt the backswept impeller of said structure and parameter, under the prerequisite that air quantity increases, effectively reduced noise, in the market its air quantity of the similar backswept impeller of Dimensions generally be 2400 cubic metres per hour, noise generally is 51 decibels, its air quantity of backswept impeller that adopts above-mentioned parameter be 2500 cubic metres per hour, noise is 45 decibels, and namely air quantity is big and noise is low.

Claims

1. backswept impeller, comprise ring leaf base plate, wheel hub, blade and baffle liner, vanes fixed is between ring leaf base plate and baffle liner, the material-saving die cavity is set in the blade, wheel hub and ring leaf base plate inboard are connected as a single entity, wheel hub is concentric with ring leaf base plate, the top of wheel hub is provided with the cylindrical plastic shaft hole sleeve that is connected as a single entity with it, wheel hub is provided with a plurality of radiation holes, it is characterized in that blade is 9, 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, last air intake angle and following air intake angle angle all are not more than 10 °, and the difference of last air intake angle and following air intake angle angle is within 3 °; The air-out angle of blade is divided into the following air-out angle near the last air-out angle of baffle liner and close ring leaf base plate, and all between 25 °-35 °, the difference of last air-out angle angle and following air-out angle angle is within 5 ° for last air-out angle and following air-out angle; All the inner and outer ends that are arranged in the blade on the ring leaf base plate form circle and blade cylindrical in the blade respectively, and diameter of a circle is the diameter 70%-76% of blade cylindrical in the blade; Blade top is made of the connection area that is connected as a single entity and disconnected district, connection area and the baffle liner of blade are fixed by ultrasonic welding, disconnected district is in the air intake direction of blade inboard, and the connection area is in the outside in disconnected district, and connection area length accounts for the 50%-60% of vane tip length; The tie point in connection area and disconnected district is that the highest point of blade is the summit, and the height of outboard end is the 85%-95% of blade apex height in the blade; Air-admitting surface between the adjacent blades is the 70%-75% of the exhaust outlet area of correspondence arbitrarily; Hub height is the 63%-72% of impeller sidepiece height, and described impeller sidepiece height is the whole height of ring leaf base plate, blade and baffle liner.

2. backswept impeller according to claim 1 is characterized in that the air-admitting surface between any adjacent blades is the 73%-74% of the exhaust outlet area of correspondence; The length of material-saving die cavity is the 45%-55% of length of blade; Circular diameter is the 45%-55% of outside diameter in the described ring leaf base plate, and ring leaf base plate outside diameter is between 500mm-550mm; The height of baffle liner is identical with the baffle liner width dimensions; The height of baffle liner is the 45%-55% of blade exhaust outlet height, and the guide face on the baffle liner is arc shaped surface.

3. backswept impeller according to claim 2 is characterized in that the air intake angle is 3 °, and following air intake angle is 2 °, and last air-out angle is 30 °, and following air-out angle is 31 °; Circular diameter is 388.5.6mm in the blade, and the blade outside diameter is 520mm; The thickness size of blade is no more than 19mm; Connection area length is 83.4mm, and length of blade is 154.4mm, and vane tip length is 154.4mm; The height 113.5mm of blade outboard end, the height of blade medial extremity is 112.9mm, the height of the tie point in connection area and disconnected district is 124.9mm; The length of material-saving die cavity is 74.1mm, and the widest position of blade is 16.8mm, and the widest position of material-saving die cavity is 9.5mm; Circular diameter is 274.3mm in the ring leaf base plate, and ring leaf base plate outside diameter is 520mm, and the bottom of blade outboard end is concordant with ring leaf plate outer side limit, and hub height is 115.8mm, and impeller sidepiece height is 171.7mm; The height of baffle liner is 55.2mm, and the height of blade exhaust outlet is 113.5mm.

4. backswept impeller according to claim 1 is characterized in that radiation hole is 5, the arrangement of 5 equidistant rules of radiation hole.

5. backswept impeller according to claim 1 is characterized in that described stiffener is projection, and described auxiliary stiffener is groove.

6. backswept impeller according to claim 1 is characterized in that described stiffener is groove, and described auxiliary stiffener is projection.