CN201318316Y

CN201318316Y - Impeller central disc

Info

Publication number: CN201318316Y
Application number: CNU200820169698XU
Authority: CN
Inventors: 高炎康; 何书开; 王伟立
Original assignee: ZHEJIANG LANGDI GROUP Ltd
Current assignee: ZHEJIANG LANGDI GROUP Ltd
Priority date: 2008-12-15
Filing date: 2008-12-15
Publication date: 2009-09-30
Anticipated expiration: 2018-12-15

Abstract

The utility model discloses an impeller central disc, comprising a disc body, a plurality of plugging sheet holes are arranged on the disc body, and the plugging sheet hole is composed of an arc wall surface and a bow wall surface, the middle part of the bow wall surface is a concave surface which is opposite to the radian of the arc wall surface, and the two end surfaces of the bow wall surface are parallel to the two ends of the arc wall surface for forming a flat groove, the bottom part of which is an right angle. The connecting position of the two end surfaces of the bow wall surface and the concave surface is a round corner, the shortest distance of the concave surface of the bow wall surface and the arc wall surface is more than the width of a straight groove. The plugging sheet holes are uniformly arrayed along the circumferential direction of the disc body, and the center of a plurality of the plugging sheet holes is arranged on the same circumference which takes the center of the disc body as a circle center. The space of any two plugging sheet holes is equal. When the two ends of the bottom part of the blade is clamped in the plugging sheet holes, the two ends of the bottom part of the blade and the two ends of the plugging sheet holes are in a surface contact, therefore, when the impeller rotates, the blade and the plugging sheet holes can not move relatively, thereby avoiding from periodic noise.

Description

A kind of impeller mid-game

Technical field

The utility model relates to a kind of impeller spare that is applicable in metal centrifugal pump machine, the blower fan, is specifically related to a kind of impeller mid-game.

Background technique

Impeller claims active wheel again, it is the medium equipment 1 topmost merit output block of pump machine, blower fan, after fluid (liquid, gas) enters body, under the effect of impeller blade, make high speed rotating with impeller, fluid is subjected to the effect of rotary centrifugal force, and the diffusion in impeller flows, pressure after making it by impeller is improved, and this shows, the performance of impeller and technical order have very important influence for output work, mechanical efficiency and the parameters such as noise, life-span of pump machine, blower fan.Impeller is generally constituted by parts such as impeller mid-game, impeller cover and blades, promptly is provided with inserting-plate hole in the impeller mid-game, and the mantle lobe wheel cap was implemented fixing after impeller blade inserted and tightens in the inserting-plate hole.

Existing impeller mid-game as shown in Figure 1, Fig. 2 is the enlarged diagram of Fig. 1 inserting-plate hole part, its structure is: the disk body 9 of impeller mid-game is provided with inserting-plate hole 91, described inserting-plate hole 91 is made up of arcuation wall and straight wall, the joint, two ends of described arcuation wall and straight wall is a chamfering 92, the shape of the bottom of blade 8 for matching with the radian of inserting-plate hole, after inserting-plate hole 91 is inserted in the bottom of blade 8, the bi-side of blade 8 bottoms are that point contacts with two chamferings, 92 places of inserting-plate hole 91, impeller is when roll riveting, blade 8 bottoms can not cooperate fully with the chamfering 92 of inserting-plate hole 91, blade 8 can be done relative motion at chamfering 92 places, therefore, impeller can produce regular noise, and then influence the quiet requirement of product because of the cycle collision of the chamfering 92 of blade 8 bottoms and inserting-plate hole 91 in the running, in the field comparatively responsive to the wheel rotation noise, this defective is just particularly evident.

Summary of the invention:

Goal of the invention of the present utility model, be in the existing impeller mid-game because of the structural feature of its inserting-plate hole, can produce big noise when causing wheel rotation, the defective that the quiet index of product is relatively poor, a kind of impeller mid-game has been proposed, adopt the impeller mid-game of this structure, after blade inserts, during wheel rotation, blade and impeller mid-game can closely cooperate, can be because of the periodic noise of caused by relative motion, quiet satisfactory for result, and the utility model is simple in structure, and stable performance is particluarly suitable for the impeller operating noise is comparatively used in apparatus sensitive and the working environment.

For achieving the above object, the technical solution used in the present invention is:

A kind of impeller mid-game, comprise disk body, described disk body is provided with some inserting-plate holes, and described inserting-plate hole is made of an arcuation wall and an arc wall, at right angles, and constituting the bottom with described arc wall, to have an angle at least be rising as high as the banks of right angle between the both ends of the surface of described arcuation wall and described disk body.

Further, the middle part of described arc wall is and the opposite concave surface of described arcuation wall radian.

Further, the both ends of the surface of described arc wall and concave surface joint are fillet.

Further, the described width that is positioned at concave surface on the arc wall and the minimum range between described arcuation wall greater than described straight trough.

Further, the described inserting-plate hole that is positioned on the disk body is evenly distributed according to the disk body circumferencial direction, and the center of described several inserting-plate holes is being on the same circumference in the center of circle with described disk body center all.

Further, equidistant between described any two adjacent inserting-plate holes.

The beneficial effects of the utility model are:

1, the inserting-plate hole two ends in a kind of impeller mid-game of the utility model are straight trough, after two ends, blade bottom snap in inserting-plate hole, two ends, blade bottom are that face contacts with the straight trough at inserting-plate hole two ends, thereby when wheel rotation, relative movement can not take place between blade and inserting-plate hole, avoided the periodicity noise that therefore produces.

2, effect of the present utility model only need can realize that easy to process, cost is lower by the shape that changes inserting-plate hole.

Description of drawings:

Fig. 1 is the structural representation of existing impeller mid-game;

Fig. 2 is the enlarged view of Fig. 1 inserting-plate hole A and blade base section;

Fig. 3 is a structural representation of the present utility model;

Fig. 4 is the enlarged view of 3 inserting-plate hole B and blade base section.

Embodiment:

Below in conjunction with accompanying drawing the present invention is further specified:

Shown in Fig. 3,4, a kind of impeller mid-game, comprise disk body 1, described disk body 1 is provided with some inserting-plate holes 2, described inserting-plate hole 2 is made of an arcuation wall 21 and an arc wall 22,1 of the both ends of the surface of described arcuation wall 21 and described disk body at right angles, and with described arc wall 22 constitute the bottom have at least an angle be the right angle rise as high as the banks 24.The middle part of described arc wall 22 is and the opposite concave surface 23 of described arcuation wall 21 radians, the described width that is positioned at the minimum range of 21 of concave surface 23 on the arc wall 22 and described arcuation walls greater than described straight trough 24, the both ends of the surface of described arc wall 22 and concave surface 23 joints are fillet.

The described inserting-plate hole 2 that is positioned on the disk body 1 is evenly distributed according to disk body 1 circumferencial direction, and the center of described several inserting-plate holes 2 is being on the same circumference in the center of circle with described disk body 1 center all.Equidistant between described any two adjacent inserting-plate holes 2.

After two ends, blade 3 bottom snap in inserting-plate hole 2, two ends, blade 3 bottom contact for face with the straight trough 24 at inserting-plate hole 2 two ends, thereby when wheel rotation, pressure increasing along with roll riveting, blade 3 by tightly be fixed on 2 li of inserting-plate holes, the wall of the end face of blade 3 bottoms and inserting-plate hole 2 two ends straight troughs 24 is close together, and 2 of blade 3 and inserting-plate holes relative movement can not take place, and has avoided the periodicity noise that therefore produces.

What must note is, embodiment only is to of the present utility model further specifying and non-limiting, and any employing invention spirit of the present utility model and only structure of the present utility model is made simple transformation is still in protection domain of the present utility model.

Claims

1, a kind of impeller mid-game, comprise disk body (1), described disk body (1) is provided with some inserting-plate holes (2), it is characterized in that: described inserting-plate hole (2) is made of an arcuation wall (21) and an arc wall (22), be the right angle between the both ends of the surface of described arcuation wall (21) and described disk body, and constituting the bottom with described arc wall (22), to have an angle at least be rise as high as the banks (24) at right angle.

2, a kind of impeller mid-game according to claim 1 is characterized in that: the middle part of described arc wall (22) is the concave surface (23) opposite with described arcuation wall (21) radian

3, a kind of impeller mid-game according to claim 2 is characterized in that: the both ends of the surface of described arc wall (22) and concave surface (23) joint are fillet.

4, according to claim 2 or 3 described a kind of impeller mid-games, it is characterized in that: the described width that is positioned at concave surface (23) on the arc wall (22) and the minimum range between described arcuation wall (21) greater than described straight trough (24).

5, a kind of impeller mid-game according to claim 1, it is characterized in that: the described inserting-plate hole (2) that is positioned on the disk body (1) is evenly distributed according to disk body (1) circumferencial direction, and the center of described several inserting-plate holes (2) is being on the same circumference in the center of circle with described disk body (1) center all.

6, a kind of according to claim 1 or 5 impeller mid-game is characterized in that: equidistant between described any two adjacent inserting-plate holes (2).