CN219412999U

CN219412999U - High-temperature and high-pressure release structure of centrifugal blower

Info

Publication number: CN219412999U
Application number: CN202223141968.5U
Authority: CN
Inventors: 王雪; 田煜
Original assignee: Jingxiao Suspension Suzhou Technology Co ltd
Current assignee: Jingxiao Suspension Suzhou Technology Co ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-07-25
Anticipated expiration: 2032-11-25

Abstract

The utility model discloses a high-temperature and high-pressure release structure of a centrifugal blower, wherein a volute is fixedly arranged at one end of a motor shell, a bearing seat is fixedly arranged at the end of the motor shell, a motor shaft is pivoted with the bearing seat, an impeller is connected with the motor shaft and is positioned in the volute, a through hole is formed in the bearing seat, and the through hole is positioned at the back of the impeller. The high-temperature and high-pressure gas accumulated on the back surface of the impeller can be guided out of the space between the back surface of the impeller and the bearing seat through the through hole, so that the temperature and pressure of the gas in the space are reduced, the axial force of the impeller is reduced, the channeling amount of the impeller is reduced, and the stability of the structure of the blower and the extension of the service life of the blower are facilitated.

Description

High-temperature and high-pressure release structure of centrifugal blower

Technical Field

The present utility model relates to blower devices, and in particular to centrifugal blowers.

Background

The centrifugal blower is based on the principle of converting kinetic energy into potential energy, and utilizes an impeller rotating at high speed to accelerate gas, then decelerate and change flow direction so as to convert kinetic energy into potential energy.

The centrifugal blower comprises a motor, a volute connected with a motor shell and an impeller connected with a motor shaft and positioned in the volute. When the centrifugal blower works, the impeller rotates, the axial force of the impeller is forward, and meanwhile, under the driving of the impeller, high-pressure gas formed in the volute acts on the back surface of the impeller, so that the forward axial force is caused. The superposition of the two axial forces reduces the stability of the connection of the motor shaft with the parts thereon and the stability of the connection of the motor shaft with the secondary parts thereon.

The high-speed motor for the centrifugal blower is usually air-cooled, and when the power is high and the outlet pressure is high, high-temperature and high-pressure gas can leak to the motor from the outlet. Therefore, high-temperature and high-pressure gas is accumulated at the joint of the volute and the motor, and the space at the back of the impeller is a main accumulation area of the high-temperature and high-pressure gas.

The existence of high-temperature high-pressure gas causes high temperature at the heat dissipation inlet of the motor, and the heat dissipation efficiency of the motor is reduced. The heat dissipation efficiency of the motor is reduced, the stability and reliability of the motor are reduced, and the service life of the motor is also reduced.

Disclosure of Invention

The technical problems solved by the utility model are as follows: how to release the high-temperature and high-pressure gas at the back of the impeller of the centrifugal blower.

In order to solve the technical problems, the utility model provides the following technical scheme: a high-temperature and high-pressure release structure of a centrifugal blower is characterized in that a volute is fixedly arranged at one end of a motor shell, a bearing seat is fixedly arranged at the end of the motor shell, a motor shaft is pivoted with the bearing seat, an impeller is connected with the motor shaft and is positioned in the volute, a through hole is formed in the bearing seat, and the through hole is positioned on the back surface of the impeller.

Because of the opening of the through hole, the high-temperature and high-pressure gas accumulated on the back surface of the impeller can be guided out of the space between the back surface of the impeller and the bearing seat through the through hole, so that the temperature and the pressure of the gas in the space are reduced.

Alternatively, the through hole is a straight hole, and the straight hole is communicated with the inner cavity of the motor shell. The motor stator and the rotor are loaded in the inner cavity of the motor shell, high-temperature gas released into the motor shell can exchange heat with a water cooling system or an air cooling system of the motor, and heat is discharged out of the motor.

Alternatively, the through hole is a bent hole, and the bent hole is communicated with the external space of the motor shell. Thus, the high-temperature high-pressure gas at the back of the impeller is directly released to the outside of the motor.

The high-temperature high-pressure release structure reduces the axial force of the impeller, reduces the movement quantity of the impeller, avoids the overhigh local temperature of the blower, is beneficial to the stability of the blower structure, and is beneficial to the improvement of the reliability of the motor and the extension of the service life.

Drawings

The utility model is further described with reference to the accompanying drawings:

FIG. 1 is a schematic view of a first embodiment of a high temperature and high pressure release structure for a centrifugal blower;

fig. 2 is a schematic view of a second embodiment of a high temperature and high pressure release structure for a centrifugal blower.

The symbols in the drawings illustrate:

1. a volute; 2. a motor shaft; 3. an impeller; 4. a bearing seat; 41. a straight hole; 42. bending holes; 5. a motor stator; 6. a motor housing.

Detailed Description

First embodiment:

as shown in figure 1, in the high-temperature and high-pressure release structure of the centrifugal blower, a volute 1 is fixedly arranged at one end of a motor housing 6, a bearing seat 4 is fixedly arranged at the end of the motor housing, a motor shaft 2 is pivoted with the bearing seat, an impeller 3 is connected with the motor shaft and is positioned in the volute, a through hole is formed in the bearing seat, and the through hole is positioned at the back surface of the impeller.

The through hole is a straight hole 41, and the straight hole is communicated with the inner cavity of the motor shell 6.

When the centrifugal blower works, the motor shaft 2 rotates to drive the impeller 3 to rotate, and the axial force is forward. Under the drive of the impeller 3, high-pressure gas is formed in the volute 1, and the high-pressure gas acts on the back surface of the impeller 3 to apply forward axial force to the impeller. When the centrifugal blower has higher power and higher outlet pressure, high-temperature and high-pressure gas can leak to the motor from the outlet, and the space at the back of the impeller where the volute is connected with the motor accumulates the high-temperature and high-pressure gas. The straight hole 41 in the bearing seat 4 guides out the high-temperature and high-pressure gas accumulated on the back surface of the impeller 3, so that the gas temperature and pressure in the space are reduced, and the axial force of the impeller 3 is reduced.

The motor housing 6 is internally provided with a motor stator 5 which is matched with the rotor, the motor shaft 2 is fixedly connected with the rotor, and the motor stator is fixedly connected with the motor housing.

The motor housing 6 is fixedly connected with the bearing seat 4, the volute 1 is fixedly connected with the bearing seat, and the bearing seat 4 is fixedly connected with the motor housing 6 and the volute 1.

One end of the motor shaft 2 is pivoted with the bearing seat 4 through a bearing, the end of the motor shaft extends into the volute 1, and the impeller 3 is directly and fixedly arranged on the end of the motor shaft.

The number of the straight holes 41 on the bearing seat 4 is a plurality, and the straight holes 41 are uniformly distributed along the circumferential direction of the bearing seat 4. The radial distance between any one of the straight holes 41 and the motor shaft 2 is smaller than the outer diameter of the impeller 3, so that high-temperature and high-pressure gas between the back surface of the impeller 3 and the bearing housing 4 can be effectively discharged.

As an improvement, the other end of the motor shaft 2 is pivoted with a heat dissipation fan blade, the air discharged into the motor housing 6 through the straight hole 41 on the bearing seat 4 flows backwards through the motor stator 5 and the rotor to drive the heat dissipation fan blade, and the heat dissipation fan blade discharges the air in the motor housing 6. In this way, not only is high temperature gas prevented from accumulating in the motor housing 6, but also the flowing gas can discharge heat generated by the motor stator 5 and the rotor.

Second embodiment:

as shown in figure 2, in the high-temperature and high-pressure release structure of the centrifugal blower, a volute 1 is fixedly arranged at one end of a motor housing 6, a bearing seat 4 is fixedly arranged at the end of the motor housing, a motor shaft 2 is pivoted with the bearing seat, an impeller 3 is connected with the motor shaft and is positioned in the volute, a through hole is formed in the bearing seat, and the through hole is positioned at the back surface of the impeller.

The through holes are bent holes 42 which are communicated with the external space of the motor housing 6.

The curved hole 42 on the bearing seat 4 directly guides the high-temperature and high-pressure gas accumulated on the back surface of the impeller 3 out of the blower and releases the gas into the atmosphere, so that the temperature and pressure of the gas on the back surface of the impeller 3 are reduced.

The number of the bending holes 42 on the bearing seat 4 is a plurality, and the bending holes 42 are uniformly distributed along the circumferential direction of the bearing seat 4.

Any curved hole 42 comprises an axial section and a radial section which are joined, wherein the radial distance of the axial section from the motor shaft 2 is smaller than the outer diameter of the impeller 3, so that high temperature and high pressure gas between the back surface of the impeller 3 and the bearing housing 4 can be effectively discharged.

The embodiment solves the problem that the high-temperature high-pressure gas of the traditional high-speed centrifugal fan leaks to the motor, and reduces the heat dissipation efficiency of the motor to cause the failure of the motor.

The foregoing is merely illustrative of the preferred embodiments of the present utility model, and modifications in detail will readily occur to those skilled in the art based on the teachings herein without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a centrifugal blower high temperature high pressure release structure, spiral case (1) is fixed to be set up in motor housing (6) one end, and motor housing's this end is fixed to be equipped with bearing frame (4), motor shaft (2) with the bearing frame pin joint, impeller (3) are connected and are located the spiral case, its characterized in that with the motor shaft: the bearing seat is provided with a through hole which is positioned at the back of the impeller;

the through hole is a straight hole (41) which is communicated with the inner cavity of the motor shell (6).

2. A centrifugal blower high temperature and high pressure release structure as defined in claim 1, wherein: the motor shell (6) is fixedly connected with the bearing seat (4), and the volute (1) is fixedly connected with the bearing seat.

3. A centrifugal blower high temperature and high pressure release structure as defined in claim 1, wherein: one end of a motor shaft (2) is pivoted with the bearing seat (4) through a bearing, the end of the motor shaft stretches into the volute (1), and the impeller (3) is arranged on the end of the motor shaft.

4. A centrifugal blower high temperature and high pressure release structure as defined in claim 1, wherein: the number of the through holes is a plurality of, and the through holes are uniformly distributed along the circumferential direction of the bearing seat (4).