CN212508907U

CN212508907U - Gas suspension centrifugal blower

Info

Publication number: CN212508907U
Application number: CN202020896538.6U
Authority: CN
Inventors: 徐云胜; 马蓬勃
Original assignee: TIANJIN TIANGU MECHANICAL MANUFACTURING CO LTD
Current assignee: TIANJIN TIANGU MECHANICAL MANUFACTURING CO LTD
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-02-09
Anticipated expiration: 2030-05-25

Abstract

The utility model relates to the technical field of air blowers, in particular to an air suspension centrifugal air blower, which comprises a volute; the gas suspension bearing and the impeller are arranged in the volute, and the motor is arranged outside the volute; a rotating shaft is arranged in the center of the air suspension bearing, one end of the rotating shaft is connected with the impeller, and the other end of the rotating shaft is connected with the motor; the air suspension bearing comprises a bearing shell, wherein an air inlet channel and an air inlet pipe are arranged on the bearing shell along the radial direction; an outer air chamber is arranged between the outer side of the air inlet pipe and the inner side of the bearing shell, and an inner air chamber is arranged between the inner side of the air inlet pipe and the rotating shaft; the pipe wall of the air inlet pipe is provided with an air channel communicated with the inner air chamber and the outer air chamber; a plurality of grooves are uniformly distributed in the air inlet pipe along the radial direction and the circumferential direction, elastic supporting members are fixed in the grooves, and one end of each elastic supporting member close to the rotating shaft along the radial direction extends out of the air inlet pipe and keeps a certain gap with the rotating shaft. The structure can avoid the hard contact between the rotating shaft and the inner wall of the air inlet pipe, avoid the collision and the vibration of the rotating shaft caused by the uneven air pressure in the gap between the bearing and the rotating shaft, and improve the rotating reliability of the bearing.

Description

Gas suspension centrifugal blower

Technical Field

The utility model belongs to the technical field of the air-blower technique and specifically relates to a gas suspension centrifugal blower is related to.

Background

At present, the air suspension centrifugal blower adopts three core high-end technologies of 'ultra-high speed direct connection motor', 'air suspension bearing' and 'high-precision single-stage centrifugal impeller', and creates a new fan epoch with high efficiency, high performance, low noise and low energy consumption. The air suspension bearing is used as the core part of the air suspension centrifugal blower, and the air suspension bearing utilizes the viscosity of air to fully dry and filter external compressed air, and then the air is guided into a bearing gap through air inlets and some air injection holes formed on the working surface of the bearing, so that the space between the bearing and a rotor is filled with compressed air, and a load is supported by the aid of a formed pressure air film to realize stable action. The bearing is different from the traditional ball bearing, no physical contact point exists between the rotating shaft and the bearing during operation, so that lubricating oil is not needed, the energy loss is extremely low, the efficiency is extremely high, and the bearing is suitable for various working environments.

The rotational reliability of the air bearing is therefore of great importance, otherwise it may happen that the air bearing load does not comply with the specified limits, or even that the solid body locks up due to direct contact, causing damage to the bearing and to the spindle.

SUMMERY OF THE UTILITY MODEL

The utility model provides a can improve the gas suspension centrifugal blower of bearing rotation reliability for solve the technical problem that exists among the well-known technique.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an air-suspending centrifugal blower includes a scroll; the gas suspension bearing and the impeller are arranged in the volute, and the motor is arranged outside the volute; a rotating shaft is arranged in the center of the air suspension bearing, one end of the rotating shaft is connected with the impeller, and the other end of the rotating shaft is connected with the motor;

the volute is axially and horizontally arranged; an air inlet is formed in the center of one side of the volute, which is far away from the motor, and an air outlet connected with an air outlet pipe is formed in one side of the top of the volute;

the air suspension bearing comprises a cylindrical bearing shell, and an air inlet channel is arranged on the bearing shell along the radial direction; a bearing front cover and a bearing rear cover are respectively connected to the two axial ends of the bearing shell, and a cylindrical air inlet pipe is connected between the bearing front cover and the bearing rear cover; the rotating shaft is arranged in the air inlet pipe; the bearing front cover and the bearing rear cover are respectively provided with a connecting hole matched with the rotating shaft;

an outer air chamber is arranged between the outer side of the air inlet pipe and the inner side of the bearing shell, and an inner air chamber is arranged between the inner side of the air inlet pipe and the rotating shaft; the pipe wall of the air inlet pipe is provided with a plurality of air channels communicated with the inner air chamber and the outer air chamber; a plurality of grooves are uniformly distributed in the air inlet pipe along the radial direction in the circumferential direction, elastic supporting members are fixed in the grooves, and one end of each elastic supporting member close to the rotating shaft along the radial direction extends out of the air inlet pipe and keeps a certain gap with the rotating shaft.

Furthermore, the elastic supporting part comprises an elastic circular ring attached to the inner wall of the air inlet pipe, and an elastic clamping block matched with the groove is arranged on the outer side of the elastic circular ring.

Further, the groove is a trapezoidal groove with a large inner part and a small outer part.

Furthermore, the air inlet pipe is buckled and connected together by two semicircular pipe bodies.

Furthermore, the air duct of the air inlet pipe is spiral.

Furthermore, the air inlet channel is an annular channel arranged in the middle of the bearing shell.

Furthermore, the air inlet of the air inlet channel is provided with a convex block, the convex block is internally provided with a horn mouth communicated with the air inlet channel, and the sectional area of the horn mouth is gradually reduced from the outside to the inside.

Furthermore, the volute is a three-center equal-height variable-angle volute structure formed by welding three arcs with different radiuses.

Furthermore, the volute is formed by welding an R1 arc segment with O1 as the center at one end of an R2 arc segment with O2 as the center, and welding an R3 arc segment with O3 as the center at the other end; the sum of the angles of the three arc segments with different radiuses is 270 degrees.

The utility model has the advantages and positive effects that:

the air suspension centrifugal blower of the utility model is provided with an air inlet channel along the radial direction on the bearing shell; an air inlet pipe is connected between the bearing front cover and the bearing rear cover; a rotating shaft connected with a motor is arranged in the air inlet pipe; an outer air chamber is arranged between the outer side of the air inlet pipe and the inner side of the bearing shell, and an inner air chamber is arranged between the inner side of the air inlet pipe and the rotating shaft; the wall of the air inlet pipe is provided with a plurality of air channels which are communicated with the inner air chamber and the outer air chamber. The air inlet pipe is internally provided with the elastic supporting part, the structure can avoid the hard contact between the rotating shaft and the inner wall of the air inlet pipe, solves the problems of serious collision and friction and vibration of the rotating shaft caused by the uneven air pressure in the gap between the bearing and the rotating shaft, and improves the rotation reliability of the bearing.

Specifically, the groove for mounting the elastic supporting member is trapezoidal, so that the supporting member is not easy to fall off; in addition, the air duct of the air inlet pipe is spiral, and compressed air entering the outer air chamber uniformly enters the inner air chamber through the spiral air duct, so that the air speed is further improved, and a vortex-shaped air film is favorably formed. Furthermore, the air inlet channel is an annular channel arranged in the middle of the bearing shell, so that the air inlet pipe is uniformly ventilated; the air inlet of the air inlet channel is provided with a convex block, the convex block is internally provided with a horn mouth communicated with the air inlet channel, and the horn mouth is gradually reduced from the outside to the inner sectional area so as to further improve the air pressure.

In addition, the volute adopts a spiral structure of a large volute with equal height and variable angle, three centers are 270 degrees, and the connection of three arcs with different radiuses is smoother.

Description of the drawings:

FIG. 1 is a front view of a gas suspension centrifugal blower according to the present invention;

FIG. 2 is a right side view of the air suspension centrifugal blower of the present invention;

FIG. 3 is a front sectional view of the air bearing of the present invention;

FIG. 4 is a schematic view of the air inlet duct, the front bearing cover and the rear bearing cover of the present invention;

fig. 5 is a view a-a of fig. 3.

Wherein: 1. a volute; 11. an air inlet; 12. an air outlet;

2. an air bearing; 21. a bearing housing; 211. an air inlet channel; 2111. a bump; 221. a bearing front cover; 222. a bearing rear cover; 223. connecting holes; 23. an air inlet pipe; 231. a groove; 232. an elastic support member; 2321. an elastic ring; 2322. a clamping block; 24. a rotating shaft; 25. an external air chamber; 26. an inner air chamber; 27. an air duct;

3. an impeller; 4. a motor; 5. and an air outlet pipe.

Detailed Description

The drawings in the embodiments of the present invention will be combined; the technical scheme in the embodiment of the utility model is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the present invention; rather than all embodiments. Based on the embodiment of the utility model; all other embodiments obtained by a person skilled in the art without making any inventive step; all belong to the protection scope of the utility model.

As shown in fig. 1-5, the present invention provides an air suspension centrifugal blower, which comprises a volute 1; an air suspension bearing 2 and an impeller 3 are arranged in the volute 1, and a motor 4 is arranged outside the volute 1; the center of the air suspension bearing 2 is provided with a rotating shaft 24, one end of the rotating shaft 24 is connected with the impeller 3, and the other end is connected with the motor 4.

Specifically, the volute 1 is a three-center equal-height variable-angle volute 1 structure formed by welding three arcs with different radiuses, and is axially and horizontally arranged; an air inlet 11 is formed in the center of one side of the volute 1, which is far away from the motor 4, and an air outlet 12 connected with the air outlet pipe 5 is formed in one side of the top of the volute 1; specifically, the scroll 1 is formed by welding an R1 arc segment with O1 as a center at one end of an R2 arc segment with O2 as a center, and welding an R3 arc segment with O3 as a center at the other end; the sum of the angles of the three arc sections with different radiuses is 270 degrees, the connection of the three arcs with different radiuses is smoother, and air flow can be led into the air outlet 12 stably.

The air suspension bearing 2 comprises a cylindrical bearing shell 21, and an air inlet channel 211 is arranged on the bearing shell 21 along the radial direction; a bearing front cover 221 and a bearing rear cover 222 are respectively connected to two axial ends of the bearing shell 21, a cylindrical air inlet pipe 23 is connected between the bearing front cover 221 and the bearing rear cover 222, and the rotating shaft 24 is arranged in the air inlet pipe 23; the bearing front cover 221 and the bearing rear cover 222 are both provided with a connecting hole 223 matched with the rotating shaft 24;

an outer air chamber 25 is arranged between the outer side of the air inlet pipe 23 and the inner side of the bearing shell 21, and an inner air chamber 26 is arranged between the inner side of the air inlet pipe 23 and the rotating shaft 24; the wall of the air inlet pipe 23 is provided with a plurality of air channels 27 communicating the inner air chamber 25 and the outer air chamber 25, so that compressed air enters the outer air chamber 25 through the air inlet channel 211 and enters the inner air chamber 26 through the air channels 27, and due to the viscous characteristic of the air, the air pressure of the inner air chamber 26 is increased, the rotating shaft 24 is floated, and the high-speed rotation of the rotating shaft 24 is realized.

Preferably, in order to prevent the rotating shaft 24 from being damaged due to hard contact, a plurality of grooves 231 are uniformly distributed in the air inlet pipe 23 along the radial direction and the circumference, an elastic supporting member 232 is fixed in each groove 231, and one end of each elastic supporting member 232 along the radial direction, which is close to the rotating shaft 24, extends out of the air inlet pipe 23 and keeps a certain gap with the rotating shaft 24, so as to prevent the rotating shaft 24 from being in hard contact with the inner wall of the air inlet pipe 23; more preferably, the elastic support 232 comprises an elastic ring 2321 attached to the inner wall of the air inlet pipe 23, and an elastic block 2322 engaged with the groove 231 is arranged outside the elastic ring 2321; the groove 231 is a trapezoidal groove with a large inside and a small outside, so that the elastic support body can be integrally installed in the groove 231 of the same circumference of the air inlet pipe 23 and is not easily removed. For the convenience of installation, the air inlet pipe 23 is formed by two semicircular pipe bodies which are buckled and connected together.

Preferably, the air duct 27 of the air inlet duct 23 is spiral, and after the compressed air entering the outer air chamber uniformly enters the inner air chamber 26 through the spiral air duct 27, the air speed is further increased, which is favorable for forming a vortex-shaped air film. Further, the air inlet channel 211 is an annular channel arranged in the middle of the bearing housing 21, so that the air inlet pipe 23 can be uniformly ventilated; the air intake 11 of air inlet channel 211 is equipped with lug 2111, be equipped with the horn mouth with air inlet channel 211 intercommunication in the lug 2111, the horn mouth reduces to interior sectional area from outer to gradually to further improve the wind pressure.

When the air suspension bearing works, the motor 4 drives the impeller 3 to rotate at a high speed through the rotating shaft 24, low-pressure vortex is formed at the impeller 3, so that outside air quickly enters the volute 1 through the air inlet 11, and then high-speed air enters the air suspension bearing 2 through the air inlet channel 211; the high-speed rotation of the rotating shaft 24 drives the surrounding gas to form a hydrodynamic field with buoyancy, so that the rotating shaft 24 is in a suspended state and can freely rotate.

The embodiments of the present invention have been described in detail, but the above description is only for the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. An air-suspending centrifugal blower includes a scroll; the gas suspension bearing and the impeller are arranged in the volute, and the motor is arranged outside the volute; a rotating shaft is arranged in the center of the air suspension bearing, one end of the rotating shaft is connected with the impeller, and the other end of the rotating shaft is connected with the motor; the method is characterized in that:

2. The air-suspending centrifugal blower of claim 1, wherein: the elastic supporting part comprises an elastic circular ring attached to the inner wall of the air inlet pipe, and an elastic clamping block matched with the groove is arranged on the outer side of the elastic circular ring.

3. The air-suspending centrifugal blower of claim 2, wherein: the groove is a trapezoidal groove with a large inner part and a small outer part.

4. The air-suspending centrifugal blower of claim 3, wherein: the air inlet pipe is buckled and connected together by two semicircular pipe bodies.

5. The air-suspending centrifugal blower of claim 1, wherein: the air duct of the air inlet pipe is spiral.

6. The air-suspending centrifugal blower of claim 1, wherein: the air inlet channel is an annular channel arranged in the middle of the bearing shell.

7. The air-suspending centrifugal blower of claim 1, wherein: the air inlet of the air inlet channel is provided with a convex block, the convex block is internally provided with a horn mouth communicated with the air inlet channel, and the sectional area of the horn mouth is gradually reduced from the outside to the inside.

8. The air-suspending centrifugal blower of claim 1, wherein: the volute is a three-center equal-height variable-angle volute structure formed by welding three arcs with different radiuses.

9. The air-suspending centrifugal blower of claim 8, wherein: the scroll is formed by welding an R1 arc segment with O1 as the center at one end of an R2 arc segment with O2 as the center, and welding an R3 arc segment with O3 as the center at the other end; the sum of the angles of the three arc segments with different radiuses is 270 degrees.