Backward centrifugal machine impeller

Abstract

The utility model relates to the field of centrifugal machine impellers, in particular to a backward centrifugal machine impeller which comprises an upper cover plate, a lower cover plate, a plurality of fan blade plates and the like, compared with the prior art, the impeller has the advantages that the impeller plates are arranged in the opposite direction, the impeller plates are in an anticlockwise extending state when seen from the upper portion, and therefore the requirements for changing the air inlet and outlet direction of an air channel and the like can be met through reverse installation of the impeller in some special use scenes under the condition that the design state of equipment is not changed; the flange bent by 90 degrees is arranged on the edge of the cover plate of the impeller, the cover plate can be assisted in protecting the cover plate from being damaged under the condition that the cover plate is subjected to external pressure with the maximum bearing force, and the overall strength of the impeller is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifuge impeller field, concretely refers to a backward centrifuge impeller. BACKGROUND

[0002] The patent application number 2022234458075 gives a kind of impeller structure applied in backward centrifugal fan, by designing a kind of unique curved surface impeller blade, effectively reduce the airflow separation of blade surface, to enhance the aerodynamic efficiency of impeller, although the product given in this technical scheme has great advantage, but there are still some troubles in use,

[0003] First, the blade is generally fixedly installed on the impeller, and its state is difficult to change, in some special use scenarios, cannot meet the demand of centrifugal fan operation;

[0004] Second, the integral type impeller cover plate, thickness is relatively thin, and extension surface is relatively large, some vibration is generated in the operation of centrifugal fan, which can cause the cover plate to be deformed and damaged by the force from the radial direction of the impeller;

[0005] Therefore, a backward centrifuge impeller is provided. INVENTION CONTENTS

[0006] I. Technical problems to be solved

[0007] The technical problem to be solved by the utility model is that the arrangement direction of the blades in the impeller is almost consistent, which cannot meet the operation requirements of some centrifugal fans in some special use scenarios, and the impeller cover plate is prone to deformation under the interference of external force.

[0008] II. Technical scheme

[0009] To solve the above technical problems, the utility model provides a technical scheme: a backward centrifuge impeller, comprising an upper cover plate, a lower cover plate and a plurality of blades containing complex surfaces, the blades are evenly distributed and installed between the upper cover plate and the lower cover plate.

[0010] The blades are arranged in a counterclockwise manner between the upper cover plate and the lower cover plate in the plane of the impeller at a top view angle.

[0011] The edges of the upper cover plate and the lower cover plate are connected with flanges at an angle of 90 degrees.

[0012] Further, one end of the blade in C curve shape is the front end of the blade, and the other end of the blade in S curve shape is the rear end of the blade, and the blade is arranged from the front end to the rear end in the counterclockwise direction in the plane of the impeller at a top view angle.

[0013] Further, the turn-up edges on the edges of the upper cover plate and the lower cover plate are all arranged downwardly.

[0014] Further, the upper cover plate is provided with a ventilation hole.

[0015] Further, the upper cover plate and the lower cover plate with the 90-degree bent turn-up edges are all arranged in an integrated stamping forming mode.

[0016] III. Advantages

[0017] Compared with the prior art, the utility model has the advantages of:

[0018] 1. In the application, the impeller is arranged in the opposite direction of the blade plate, and viewed from above, it is in a counterclockwise extending state, so that in some special use scenarios, the air duct inlet and outlet directions can be changed by reversing the impeller without changing the design state of the equipment.

[0019] 2. In the application, the edge of the impeller cover plate is provided with a 90-degree bent turn-up edge, which can help the cover plate to bear the maximum load and protect the cover plate from being damaged under external pressure, thereby increasing the overall strength of the impeller. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the appearance structure diagram of the rear centrifuge impeller of the utility model Figure 1 .

[0021] Figure 2 is the appearance structure diagram of the rear centrifuge impeller of the utility model Figure 2 .

[0022] Figure 3 is the appearance structure diagram of the rear centrifuge impeller of the utility model Figure 3 .

[0023] As shown in the figure: 1, upper cover plate, 2, blade plate, 3, lower cover plate, 4, turn-up edge, 5, front end of blade plate, 6, rear end of blade plate. DETAILED DESCRIPTION

[0024] The utility model will be further described in detail below in combination with the drawings.

[0025] To solve the above technical problems, the technical scheme provided by the utility model is: a rear centrifuge impeller, in combination with the drawings Figures 1-3 , it comprises an upper cover plate 1, a lower cover plate 3 and a plurality of blade plates 2 with complex curved surfaces, the upper cover plate 1 is provided with a ventilation hole;

[0026] Firstly, the upper cover plate 1 and the lower cover plate 3 form the support framework of the impeller structure, and a plurality of leaf plates 2 are arranged between the upper cover plate 1 and the lower cover plate 3, and the leaf plates 2, the upper cover plate 1 and the lower cover plate 3 together form the main structure of the impeller;

[0027] Combined with the drawings Figure 1 and the drawings Figure 3 , the leaf plates 2 are evenly arranged between the upper cover plate 1 and the lower cover plate 3, one end of the leaf plate 2 in C curve shape is the front end 5 of the leaf plate, and the other end of the leaf plate 2 in S curve shape is the rear end 6 of the leaf plate, and the leaf plate 2 extends along the counterclockwise direction from the front end 5 to the rear end 6 in the plane of the impeller in the overhead angle, that is, the leaf plate 2 extends in the counterclockwise direction between the upper cover plate 1 and the lower cover plate 3 of the impeller;

[0028] In order to better improve the flow effect of the airflow, the leaf plate 2 adopts a complex curved surface structure, which is disclosed in the product description of patent application No. 2022234458075, and belongs to the prior art, and will not be described in detail here. The improvement point of the product developed on the basis of the above-mentioned disclosed product is that the direction of the leaf plate 2 arranged in the impeller is opposite, that is, counterclockwise, which makes up for the change of the inlet and outlet air direction in some special use scenarios;

[0029] The special-shaped surface structure design of the leaf plate 2 can produce better centrifugal guiding airflow in the air duct, effectively reduce the separation of the airflow on the surface of the leaf plate 2, and achieve the purpose of increasing efficiency. By reversing counterclockwise, the airflow direction in the air duct is changed, and the risk of bolt fastener disengagement is also reduced in the reverse direction, and the tighter the rotation is, the tighter it is;

[0030] Combined with the drawings Figures 2-3 , the upper cover plate 1 and the lower cover plate 3 are connected with the 90-degree flanging 4 at the edges, and the flanging 4 at the edges of the upper cover plate 1 and the lower cover plate 3 is arranged downwardly, and in addition, the upper cover plate 1 and the lower cover plate 3 with the 90-degree flanging 4 are arranged in an integrated stamping mode;

[0031] The flanging 4 at the edges of the upper cover plate 1 and the lower cover plate 3 is folded downward, which can reduce the pressure borne by the cover plate in the radial direction. The flanging 4 with 90-degree bending has the most significant pressure bearing effect. The cover plate formed by stamping sheet metal parts is relatively thin, and when the surface extension range is large, the 90-degree bending flanging 4 can protect the cover plate from deformation with the optimal pressure bearing effect. The cover plate structure formed in an integrated mode is not easy to break or be damaged.

[0032] The utility model discloses in the specific implementation, in some special use scene, can install the impeller, change the direction of airflow in centrifugal fan, avoid the majority specification impeller single -mindedness of guide flow direction, still cannot satisfy the awkward situation of airflow direction change after replacement, the upper cover plate 1 and the lower cover plate 3 edge 90 degree bending flanging 4 of the impeller in the working process, the impact force from airflow, centrifugal fan operation vibration etc. can provide the maximum load -bearing, protection effect for it, guarantee the good operation of impeller and centrifugal fan.

[0033] The above describes the utility model and its implementation mode, and this kind of description has no limit, and the embodiment shown in the drawing is only one of the utility model, and the actual structure is not limited to this. In general, if the ordinary skilled person in the art is inspired, without departing from the utility model creation tenet, the similar structure mode and embodiment of the technical scheme are not creatively designed, and all belong to the protection scope of the utility model.

Claims

1. A backward centrifuge impeller, comprising an upper cover plate (1), a lower cover plate (3) and a plurality of blade plates (2) with complex curved surfaces, the blade plates (2) being evenly arranged between the upper cover plate (1) and the lower cover plate (3), characterized in that: the blade plates (2) extend in a counterclockwise manner between the upper cover plate (1) and the lower cover plate (3) in a plane of the impeller from a top view; the upper cover plate (1) and the lower cover plate (3) are each connected with a 90-degree folded edge (4); one end of the blade plate (2) in a C-curve shape is a blade plate front end (5), one end of the blade plate (2) in an S-curve shape is a blade plate rear end (6), and the blade plate (2) extends along the counterclockwise direction from the blade plate front end (5) to the blade plate rear end (6) in the plane of the impeller from a top view; the folded edge (4) on the edge of the upper cover plate (1) and the lower cover plate (3) is arranged in a downwardly bent manner; the upper cover plate (1) is provided with a ventilation hole; the upper cover plate (1) and the lower cover plate (3) with the 90-degree folded edge (4) are integrally formed by stamping; and the upper cover plate (1) and the lower cover plate (3) are integrally formed by stamping. ​ ​ 2. A back centrifuge impeller according to claim 1, characterized in that: ​ 3. The back centrifuge impeller of claim 1, wherein: ​ 4. The back centrifuge impeller of claim 1, wherein: ​ 5. The back centrifuge impeller of claim 1, wherein: ​

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