Fan impeller device

Abstract

A ventilator impeller device belongs to the technical field of centrifugal ventilators and comprises a wheel disc and a wheel cover, a shaft disc is arranged at the axis of the wheel disc, and blades are arranged between the wheel disc and the wheel cover. The wheel cover is of an unequal-thickness structure, and the thickness of the part, close to the air inlet, of the wheel cover is larger than that of the remaining part. An air opening reinforcing part is arranged on the wheel cover close to the air inlet, and an edge reinforcing part is arranged on the outer edge of the wheel cover. The impeller device of the ventilator is reasonable in design and simple and ingenious in structure, the impeller cover is light in weight, the centrifugal force of the impeller is small, the manufacturing cost can be reduced, and the situation that the motor is difficult to start can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a fan impeller device. Background Art

[0002] The centrifugal fan is mainly composed of impeller, casing, coupling, shaft and other parts. The impeller is the main working part that generates wind pressure and transmits energy; the casing is mainly used to introduce and exhaust gas, and at the same time convert part of the kinetic energy of the gas into pressure energy; the coupling is used to connect the motor and the fan to transmit torque; the shaft is installed and fixed with the impeller, and is connected to the motor through the coupling.

[0003] When the impeller of a centrifugal fan rotates, the gas between the blades is subjected to the centrifugal force and gains kinetic energy (dynamic pressure head) and is discharged from the periphery of the impeller. It is guided by the volute-shaped casing and flows toward the outlet of the fan, thereby forming a negative pressure in the center of the impeller, allowing the external airflow to flow in continuously to supplement the gas, so that the fan can discharge the gas. It can be seen that the impeller is an important component of the centrifugal fan.

[0004] Under current circumstances, when the speed is high or the temperature is special, the overall strength of the impeller wheel cover is ensured by changing the material or increasing the material thickness. Taking the case of a specific material as an example, when the fan speed is low, the wheel cover material thickness is 6mm, which can fully meet the strength requirements. As the working conditions change, the impeller speed needs to be increased, and the 6mm wheel cover material thickness cannot meet the strength requirements, and the material thickness needs to be increased to 10mm. Although the traditional thickening method can meet the working conditions, as the material thickness changes, the wheel cover weight increases, the impeller centrifugal force increases, the requirements for the main shaft strength also increase, and the bearing load needs to be increased. Since the main shaft and bearings need to be increased in specifications, the production cost has increased significantly, and it will also make it difficult to start the motor. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art such as heavy wheel cover and large impeller centrifugal force, and to provide a fan impeller device with reasonable design, simple and ingenious structure, light wheel cover and small impeller centrifugal force, which can not only reduce manufacturing costs but also prevent motor starting difficulties.

[0006] The utility model is realized through the following technical scheme: a ventilator impeller device comprises a wheel disc and a wheel cover, wherein a shaft disc is arranged at the axis center of the wheel disc, and blades are arranged between the wheel disc and the wheel cover; the wheel cover is a structure of unequal thickness, and the thickness of the wheel cover near the air inlet is greater than the thickness of the remaining part; an air outlet reinforcement part is arranged near the air inlet of the wheel cover, and an edge reinforcement part is arranged at the outer edge of the wheel cover.

[0007] Since the wheel cover is of the above-mentioned unequal thickness structure, its weight and production cost are greatly reduced. The wheel cover of this structure not only meets the strength requirements, but also reduces the centrifugal force of the impeller and the rotational inertia of the impeller, which is beneficial to the starting of the motor, thereby avoiding the difficulty of starting the motor, and with the reduction of weight, the demand for the main shaft and bearings is also reduced. At the same time, the wheel cover is also provided with an air inlet reinforcement part and an edge reinforcement part, which further improves the structural strength of the wheel cover and ensures the safe operation of the impeller device.

[0008] A further improvement of the utility model is that the thickness of the wheel cover gradually decreases from the air inlet to the outer edge of the wheel cover, so that the cross section of the wheel cover forms a conical structure.

[0009] A further improvement of the utility model is that the air inlet reinforcement portion includes an inner reinforcement tube, the inner reinforcement tube is sleeved on the periphery of the air inlet and fixed on the wheel cover, and a reinforcement component is arranged between the inner reinforcement tube and the air inlet.

[0010] A further improvement of the utility model is that the reinforcing component is a sealing plate of an annular structure, the inner edge of the sealing plate is connected to the air inlet, the outer edge of the sealing plate is connected to the inner reinforcing tube, and the sealing plate is used to form a chamber between the inner reinforcing tube and the air inlet.

[0011] A further improvement of the utility model is that the inner reinforcement tube is 20 mm away from the air inlet.

[0012] A further improvement of the utility model is that the edge reinforcement portion includes an outer reinforcement tube, which is sleeved at the outer edge of the wheel cover and fixed on the wheel cover, and a plurality of inclined reinforcement ribs are evenly spaced between the outer reinforcement tube and the wheel cover.

[0013] From the above technical scheme, it can be seen that the beneficial effects of the utility model are as follows: the wheel cover with unequal thickness structure not only meets the strength requirement, but also reduces the centrifugal force of the impeller, reduces the rotational inertia of the impeller, is conducive to the starting of the motor, thereby avoiding the difficulty of starting the motor, and as the weight is reduced, the demand for the main shaft and bearings is also reduced. At the same time, the wheel cover is also provided with an air inlet reinforcement part and an edge reinforcement part, which further improves the structural strength of the wheel cover and ensures the safe operation of the impeller device. It can be seen that the impeller device is reasonably designed, simple and ingenious in structure, the wheel cover is light in weight, and the centrifugal force of the impeller is small, which not only reduces the manufacturing cost, but also prevents the difficulty of starting the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model.

[0016] Figure 2 It is a cross-sectional view of a wheel cover according to a specific embodiment of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the tuyere reinforcement part of a specific embodiment of the utility model.

[0018] Figure 4 It is a structural schematic diagram of an edge reinforcement portion of a specific embodiment of the utility model.

[0019] 1. Wheel disc; 2. Wheel cover; 3. Blades; 4. Shaft disc; 5. Air inlet; 6. Air inlet reinforcement part; 601. Inner reinforcement tube; 602. Reinforcement component; 7. Edge reinforcement part; 701. Outer reinforcement tube; 702. Reinforcement rib. DETAILED DESCRIPTION

[0020] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0021] Please refer to the attached Figure 1 —4, combined with a specific embodiment, the following is described: The utility model describes a fan impeller device, including a wheel disc 1 and a wheel cover 2. A shaft disc 4 is provided at the axis of the wheel disc 1, and blades 3 are provided between the wheel disc 1 and the wheel cover 2. The wheel cover 2 is an unequal thickness structure, and the thickness of the wheel cover 2 near the air inlet 5 is greater than the thickness of the remaining part; specifically, the thickness of the wheel cover 2 gradually decreases from the air inlet 5 to the outer edge of the wheel cover 2, so that the cross section of the wheel cover 2 forms a conical structure. The wheel cover 2 is provided with an air inlet reinforcement part 6 near the air inlet 5, and an edge reinforcement part 7 is provided at the outer edge of the wheel cover 2.

[0022] The use principle of the utility model: When the staff installs the impeller device, they can refer to the existing fan impeller. The thickness of the wheel cover 2 adopts a structure that gradually decreases from the air inlet 5 to the outer edge of the wheel cover 2, that is, the cross-section of the wheel cover 2 is a conical structure. Since the wheel cover 2 is the above-mentioned unequal thickness structure, its weight and production cost are greatly reduced. The wheel cover 2 of this structure not only meets the strength requirements, but also reduces the centrifugal force of the impeller, reduces the impeller's rotational inertia, is conducive to the start of the motor, thereby avoiding the difficulty of starting the motor, and with the reduction of weight, it also reduces the demand for the main shaft and bearings. At the same time, the wheel cover 2 is also provided with an air inlet reinforcement part 6 and an edge reinforcement part 7, which further improves the structural strength of the wheel cover 2 and ensures the safe operation of the impeller device.

[0023] In one embodiment, the air inlet reinforcement part 6 includes an inner reinforcement tube 601, which is sleeved on the periphery of the air inlet 5 and fixed on the wheel cover 2, and a reinforcement component 602 is provided between the inner reinforcement tube 601 and the air inlet 5, and the inner reinforcement tube 601 and the air inlet 5 are 20 mm apart. The air inlet 5 of the wheel cover 2 is subjected to greater force, and the air inlet reinforcement part 6 of the above structure can better ensure the overall rigidity and increase the strength of the wheel cover 2.

[0024] In one embodiment, the reinforcing member 602 is a sealing plate of an annular structure, the inner edge of the sealing plate is connected to the air inlet 5, and the outer edge of the sealing plate is connected to the inner reinforcing tube 601, so that a chamber is formed between the inner reinforcing tube 601 and the air inlet 5 through the sealing plate. The structure of the chamber can maximize the reduction of the weight of the air inlet reinforcement part 6 while ensuring the strength, that is, reduce the weight of the wheel cover 2.

[0025] In one embodiment, the edge reinforcement part 7 includes an outer reinforcement tube 701, which is sleeved on the outer edge of the wheel cover 2 and fixed on the wheel cover 2, and a plurality of inclined reinforcement ribs 702 are evenly spaced between the outer reinforcement tube 701 and the wheel cover 2. The edge reinforcement part 7 of the above structure can reduce the vortex inside the impeller while ensuring the strength, thereby reducing the internal loss of the fan.

[0026] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0027] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fan impeller device, comprising a wheel disc (1) and a wheel cover (2), wherein a shaft disc (4) is arranged at the axis center of the wheel disc (1), and blades (3) are arranged between the wheel disc (1) and the wheel cover (2), characterized in that: The wheel cover (2) is a structure of unequal thickness, wherein the thickness of the portion of the wheel cover (2) close to the air inlet (5) is greater than the thickness of the remaining portion thereof; an air inlet reinforcement portion (6) is provided on the wheel cover (2) close to the air inlet (5), and an edge reinforcement portion (7) is provided on the outer edge of the wheel cover (2).

2. A fan impeller device according to claim 1, characterized in that: The thickness of the wheel cover (2) gradually decreases from the air inlet (5) to the outer edge of the wheel cover (2), so that the cross section of the wheel cover (2) forms a conical structure.

3. A fan impeller device according to claim 2, characterized in that: The air inlet reinforcement portion (6) comprises an inner reinforcement tube (601), which is sleeved on the periphery of the air inlet (5) and fixed on the wheel cover (2), and a reinforcement component (602) is provided between the inner reinforcement tube (601) and the air inlet (5).

4. A fan impeller device according to claim 3, characterized in that: The reinforcing component (602) is a sealing plate with an annular structure, the inner edge of the sealing plate is connected to the air inlet (5), and the outer edge of the sealing plate is connected to the inner reinforcing tube (601), so that a chamber is formed between the inner reinforcing tube (601) and the air inlet (5).

5. A fan impeller device according to claim 4, characterized in that: The distance between the inner reinforcement tube (601) and the air inlet (5) is 20 mm.

6. A fan impeller device according to claim 5, characterized in that: The edge reinforcement portion (7) comprises an outer reinforcement tube (701), which is sleeved on the outer edge of the wheel cover (2) and fixed on the wheel cover (2), and a plurality of inclined reinforcement ribs (702) are evenly spaced between the outer reinforcement tube (701) and the wheel cover (2).

Images