CN204628098U - A kind of axial force balance also can carry out the centrifugal blower structure of motor cooling - Google Patents

Abstract

The axial force balance provided by the utility model and the centrifugal blower structure capable of cooling the motor include a motor and a volute, the motor is installed in the motor housing, the volute is provided with an impeller, and the impeller is connected to the The transmission shaft, the volute has a front inlet and a rear inlet oppositely arranged, the rear inlet is connected to the motor housing, and an air inlet passage communicated with the rear inlet is provided between the motor housing and the motor, so The impeller is bidirectional blade teeth with first blade teeth and second blade teeth. The utility model arranges an impeller with two-way blade teeth in the volute with the front inlet and the rear inlet. When the impeller rotates, the negative pressure inhales the gas at the front inlet and the rear inlet at the same time, and the gas flows from the gas outlet of the volute through centrifugal force. Discharge, because the front and rear intake air volumes of the impeller and the air outlet pressure are the same, the radial load forces cancel each other out, and generally no axial load force will be generated on the drive shaft.

Description

A centrifugal blower structure with axial force balance and motor cooling

technical field

The utility model relates to a centrifugal blower, in particular to a centrifugal blower structure with balanced axial force and capable of cooling a motor.

Background technique

As shown in Figure 1, the existing unipolar blower impeller is designed with unidirectional blade teeth. When the blower is working, the blade teeth are driven to rotate by the motor, which will generate an axial load F in the direction indicated by the arrow in Figure 1. The axial load force F is counteracted by the axial thrust bearing. The existing common practice is to install an impeller and a volute at both ends of a rotating shaft to offset the axial load force F. However, since this solution requires two sets of impellers and volutes, the installation is cumbersome and the structure is complicated. There are many inconveniences.

Contents of the invention

In order to solve the above problems, the present invention proposes a symmetrical impeller structure and a corresponding volute structure to complete the function. When the impeller is in operation, no axial load force will be generated, which greatly reduces the bearing capacity requirements of the axial thrust bearing.

In order to solve the above problems, the utility model provides a centrifugal blower structure with axial force balance and motor cooling, including a motor and a volute, the motor is installed in the motor housing, and the volute is provided with an impeller. The impeller is connected to the drive shaft of the motor, wherein the volute has a front inlet and a rear inlet oppositely arranged, the rear inlet is connected to the motor housing, and a rear inlet and a rear inlet are arranged between the motor housing and the motor The air inlet passage communicates with the inlet, and the impeller is a bidirectional blade tooth with first blade teeth and second blade teeth.

Wherein, the first blade teeth and the second blade teeth are radially symmetrical structures.

Wherein, the blade surface of the first blade tooth is opposite to the blade surface of the second blade tooth.

Wherein, a partition is provided between the first blade tooth and the second blade tooth.

Wherein, the partition plate extends to the air outlet of the volute to form a first outlet and a second outlet that are independent of each other.

Compared with the prior art, the advantages and effects of the utility model are: 1. The utility model is provided with an impeller with two-way blade teeth in the volute with the front inlet and the rear inlet. When the impeller rotates, the front inlet and the rear inlet At the same time, the inlet generates negative pressure to inhale gas, and the gas is discharged from the outlet of the volute through centrifugal force. Since the air intake at the front and rear of the impeller is the same as the pressure at the outlet, the radial load forces cancel each other out, and generally there will be no shaft damage to the drive shaft. The axial load force greatly reduces the bearing capacity requirement of the axial thrust bearing. 2. The intake air at the rear inlet of the impeller flows through the intake channel between the motor housing and the motor and enters the volute, which can cool the motor without additional motor cooling devices.

Description of drawings

Fig. 1 is a structural schematic diagram of an existing blower.

Fig. 2 is a structural schematic diagram of a centrifugal blower structure with balanced axial force and motor cooling of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the examples, the following examples are explanations of the present invention and the present invention is not limited to the following examples.

As shown in Figure 2, the utility model discloses a centrifugal blower structure with axial force balance and motor cooling. The volute 2 is provided with an impeller 1. For the blade teeth, the volute 2 is provided with opposite front inlet 3 and rear inlet 4 , the front inlet 3 serves as the air inlet of the first blade tooth 110 , and the rear inlet 4 serves as the air inlet of the second blade tooth 120 . The rear inlet 4 is connected to the motor housing 6, and the motor housing 6 is equipped with a motor 7. There is an air inlet passage 9 identical to the rear inlet 4 between the motor housing 6 and the motor 7, and the transmission shaft 8 of the motor 7 is connected and Drive impeller 1. When the impeller 1 rotates, the first blade tooth 110 and the second blade tooth 120 rotate at the same time, and the negative pressure suction gas is generated at the front inlet 3 and the rear inlet 4 at the same time, and the gas sucked into the volute 2 is discharged from the gas outlet of the volute 2 by centrifugal force. Discharge, because the front and rear air intake and air outlet pressure of the impeller 1 are the same, the front and rear radial load forces cancel each other out, generally no axial load force will be generated on the drive shaft 8, greatly reducing the bearing capacity of the axial thrust bearing Require. 2. The intake air from the rear inlet 4 of the impeller 1 flows through the intake channel 9 between the motor casing 6 and the motor 7 and enters the volute, and the motor 7 can be cooled during the intake, and no additional motor cooling device is required. Usually, the first blade teeth 110 and the second blade teeth 120 are radially symmetrical structures, and the magnitudes of the front and rear radial load forces are basically the same to achieve mutual cancellation. The blade surface 111 of the first blade tooth 110 is opposite to the blade surface 121 of the second blade tooth 120 . A partition 10 is provided between the first vane tooth 110 and the second vane tooth 120 to avoid mutual influence of front and rear intake air. The partition plate 10 extends to the air outlet of the volute 2 to form a first outlet 510 and a second outlet 520 that are independent of each other, so as to avoid the mutual influence of the first vane 110 and the second vane 120 when the air is out.

In addition, it should be noted that the specific embodiments described in this specification may be different in terms of parts, shapes and names of components. All equivalent or simple changes made according to the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the present invention or exceed the scope defined in the claims. All should belong to the protection scope of the present invention.

Claims (5)

1. an axial force balance the centrifugal blower structure of motor cooling can be carried out, comprise motor (7) and spiral case (2), described motor (7) is arranged in electric machine casing (6), impeller (1) is provided with in described spiral case (2), described impeller (1) connects the transmission shaft (8) of motor (7), it is characterized in that, described spiral case (2) has the front entrance (3) and rear entrance (4) that are oppositely arranged, described rear entrance (4) connects electric machine casing (6), and between described electric machine casing (6) with motor (7), be provided with the air intake passage (9) communicated with rear entrance (4), described impeller (1) is for having the two-way leaf-teeth of the first leaf-teeth (110) and the second leaf-teeth (120).

2. axial force balance according to claim 1 also can carry out the centrifugal blower structure of motor cooling, and it is characterized in that, described first leaf-teeth (110) and the second leaf-teeth (120) are radial symmetric structure.

3. axial force balance according to claim 2 also can carry out the centrifugal blower structure of motor cooling, it is characterized in that, the blade face (111) of described first leaf-teeth (110) and the blade face (121) of the second leaf-teeth (120) are oppositely arranged.

4. the axial force balance according to claim 1 or 2 or 3 also can carry out the centrifugal blower structure of motor cooling, it is characterized in that, is provided with dividing plate (10) between described first leaf-teeth (110) and the second leaf-teeth (120).

5. axial force balance according to claim 4 also can carry out the centrifugal blower structure of motor cooling, it is characterized in that, the air outlet that described dividing plate (10) extends to spiral case (2) forms the first separate outlet (510) and the second outlet (520).