WO2022062076A1

WO2022062076A1 - Low-loss axial flow fan

Info

Publication number: WO2022062076A1
Application number: PCT/CN2020/126008
Authority: WO
Inventors: 梁忠义
Original assignee: 台州市杰龙风机厂
Priority date: 2020-09-25
Filing date: 2020-11-03
Publication date: 2022-03-31
Also published as: CN112096627A

Abstract

Disclosed in the present invention is a low-loss axial flow fan, comprising a housing, and an impeller, an impeller support shaft, and a motor being disposed inside the housing, the impeller being fixedly connected to one end of the impeller support shaft and the other end of the impeller support shaft being connected to a motor shaft of the motor; the motor is fixed inside the housing by means of a motor bracket, and the impeller support shaft is hinged onto a support frame, the support frame being fixed onto the inner wall of the housing. In the present invention, the impeller support shaft hinged to the housing is arranged between the impeller and the motor, and the load of the motor is reduced by means of the impeller support shaft receiving the load of the impeller in excess directions, thereby effectively improving the loss of the motor and increasing the useful output power of the motor.

Description

A low-loss axial flow fan

technical field

The invention relates to the technical field of fans, in particular to a low-loss axial flow fan.

Background technique

Axial flow fans are very widely used, that is, the airflow in the same direction as the axis of the fan blades, such as electric fans, air conditioner outdoor fans are axial flow fans. It is called "axial flow" because the gas flows parallel to the fan axis. Axial flow fans are usually used in applications with high flow requirements and low pressure requirements. Axial fans fix the position and move the air. Axial flow fans are mainly composed of impeller, motor and casing. The structure is simple but the data requirements are very high. The impeller of the existing axial flow fan is generally directly fixed on the motor shaft of the motor. In the high-voltage working environment, the motor shaft of the motor provides the torque of the impeller rotation and at the same time is subject to the excess directional load of the impeller on the motor shaft, such as The weight of the impeller and the centrifugal force of the impeller greatly increase the load of the motor and reduce the practical life of the motor.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a low-loss axial flow fan, which is provided with an impeller support shaft hinged with the casing between the impeller and the motor, and receives the load in the excess direction of the impeller through the impeller support shaft. Reduce the load of the motor, thereby effectively increasing the loss of the motor and increasing the useful output power of the motor.

The solution of the present invention to solve the technical problem is:

A low-loss axial fan, comprising a casing, an impeller, an impeller support shaft and a motor are arranged in the casing, the impeller is fixedly connected with one end of the impeller support shaft, and the other end of the impeller support shaft is connected with a motor shaft of the motor The motor is fixed in the casing through the motor bracket, the impeller supporting shaft is hinged on the supporting frame, and the supporting frame is fixed on the inner wall of the casing.

The middle part of the impeller is formed with a spline blind hole with a rear side opening, and the bottom surface of the spline blind hole is formed with a bolt step through hole; the front end of the impeller support shaft is formed with a spline shaft, and the front end of the spline shaft is formed with a spline shaft. A plurality of threaded holes are arranged coaxially with the bolt stepped through holes; locking screws are sleeved in the bolt stepped through holes, and the locking screws are screwed into the threaded holes.

The support frame includes a support shaft sleeve, and the outer wall of the support shaft sleeve is fixedly connected with the inner wall of the casing through a plurality of support arms;

The support sleeve is formed with a bearing step hole with a large rear and a small front; the impeller support shaft is hinged in the bearing step hole through the bearing.

There are two bearings. The two bearings are arranged in front and back. The outer ring of the front bearing is pressed against the stepped surface of the bearing step hole, and the outer ring of the rear bearing is pressed against the first thrust bearing. The first thrust The rear side of the bearing is pressed against the rear end convex ring of the impeller support shaft; a second thrust bearing is clamped between the front end of the support sleeve and the impeller.

A ferrule is clamped between the outer rings between the two bearings.

The second thrust bearing is inserted into the collar, and the collar is inserted into and fixed on the impeller support shaft.

The rear end of the impeller support shaft is formed with a spline hole; the end of the motor shaft of the motor is formed with a spline segment matched with the flower hole.

An annular protrusion is formed on the thrust piece on the front side of the first thrust bearing, and the annular protrusion is pressed against the end surface of the outer ring of the rear side bearing.

The outstanding effect of the present invention is: compared with the prior art, an impeller support shaft hinged with the casing is arranged between the impeller and the motor, and the load of the motor is reduced by the impeller support shaft receiving the load in the excess direction of the impeller, thereby effectively improving the The loss of the motor increases the useful output power of the motor.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is a partial enlarged view of Fig. 1 about A;

Figure 3 is a rear view of the present invention.

detailed description

Embodiments, as shown in FIGS. 1 to 3 , a low-loss axial flow fan includes a casing 1, and an impeller 2, an impeller support shaft 3 and a motor 4 are arranged in the casing 1, and the impeller 2 is supported by the impeller. One end of the shaft 3 is fixedly connected, and the other end of the impeller support shaft 3 is connected with the motor shaft of the motor 4; the motor 4 is fixed in the casing 1 through the motor bracket 5, and the impeller support shaft 3 is hinged on the support frame 6, The support frame 6 is fixed on the inner wall of the casing 1 .

Furthermore, a spline blind hole 21 with a rear opening is formed in the middle of the impeller 2, and a bolt stepped through hole 22 is formed on the bottom surface of the spline blind hole 21; the front end of the impeller support shaft 3 is formed with a flower. The front end of the key shaft 31 and the spline shaft 31 is formed with a plurality of threaded holes 32 coaxially arranged with the bolt step through hole 22; the bolt step through hole 22 is sleeved with a locking screw 7, and the locking screw 7 is screwed on the bolt step through hole 22. inside the threaded hole 32.

Further, the support frame 6 includes a support shaft sleeve 61, and the outer wall of the support shaft sleeve 61 is fixedly connected with the inner wall of the casing 1 through a plurality of support arms 62;

The support sleeve 61 is formed with a bearing stepped hole 611 with a large rear and a small front; the impeller support shaft 3 is hinged in the bearing stepped hole 611 through a bearing 63 .

Furthermore, there are two bearings 63, the two bearings 63 are arranged in front and back, the outer ring of the front bearing 63 is pressed against the stepped surface of the bearing step hole 611, and the outer ring of the rear bearing 63 is pressed against the stepped surface of the bearing step hole 611. On the first thrust bearing 64, the rear side of the first thrust bearing 64 is pressed against the rear end convex ring 33 of the impeller support shaft 3; a second thrust is clamped between the front end of the support sleeve 61 and the impeller 2 Bearing 65.

Furthermore, a ferrule 66 is sandwiched between the outer rings between the two bearings 63 .

More specifically, the second thrust bearing 65 is inserted into the collar 67 , and the collar 67 is inserted into and fixed on the impeller support shaft 3 .

More specifically, the rear end of the impeller support shaft 3 is formed with a spline hole 34 ; the end of the motor shaft of the motor 4 is formed with a spline section 41 that matches with the spline hole 34 .

More specifically, an annular protrusion 641 is formed on the thrust piece on the front side of the first thrust bearing 64 , and the annular protrusion 641 is pressed against the end surface of the outer ring of the rear side bearing 63 .

Working principle: The motor drives the impeller support shaft 3 to rotate, and the impeller support shaft 3 drives the impeller 2 to rotate; the impeller support shaft 3 is hinged on the support frame 6 through two bearings 63, and the support frame bears the weight and rotation of the impeller support shaft 3 and the impeller. The motor 4 only needs to provide the torque to drive the impeller support shaft 3 to rotate, thereby effectively reducing the load of the motor and reducing the energy loss of the motor.

Finally, the above embodiments are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the relevant technical field can also make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention, and the patent protection scope of the present invention should be defined by the claims.

Claims

A low-loss axial flow fan, comprising a casing (1), an impeller (2), an impeller support shaft (3) and a motor (4) are arranged in the casing (1), characterized in that: the impeller (2) ) is fixedly connected with one end of the impeller support shaft (3), and the other end of the impeller support shaft (3) is connected with the motor shaft of the motor (4); the motor (4) is fixed on the casing (1) through the motor bracket (5). ), the impeller support shaft (3) is hinged on the support frame (6), and the support frame (6) is fixed on the inner wall of the casing (1).
A low-loss axial flow fan according to claim 1, characterized in that: the middle of the impeller (2) is formed with a spline blind hole (21) opening on the rear side, and the spline blind hole (21) is formed in the middle of the impeller (2). Bolt step through holes (22) are formed on the bottom surface; a spline shaft (31) is formed at the front end of the impeller support shaft (3), and a plurality of bolt step through holes (22) are formed at the front end of the spline shaft (31). ) a threaded hole (32) arranged concentrically; a locking screw (7) is sleeved in the bolt step through hole (22), and the locking screw (7) is screwed into the threaded hole (32).
A low-loss axial flow fan according to claim 1, characterized in that: the support frame (6) comprises a support shaft sleeve (61), and the outer wall of the support shaft sleeve (61) passes through a plurality of support arms (62). ) is fixedly connected to the inner wall of the casing (1);

The support sleeve (61) is formed with a bearing stepped hole (611) with a large rear and a small front; the impeller support shaft (3) is hinged in the bearing stepped hole (611) through a bearing (63).
A low-loss axial flow fan according to claim 3, characterized in that: there are two bearings (63), the two bearings (63) are arranged in front and rear, and the outer ring of the front bearing (63) is pressed Relying on the stepped surface of the bearing step hole (611), the outer ring of the rear bearing (63) is pressed against the first thrust bearing (64), and the rear side of the first thrust bearing (64) is pressed against the impeller support A second thrust bearing (65) is clamped between the front end of the support sleeve (61) and the impeller (2).
The low-loss axial flow fan according to claim 4, characterized in that: a ferrule (66) is clamped between the outer rings between the two bearings (63).
A low-loss axial flow fan according to claim 4, characterized in that: the second thrust bearing (65) is inserted into the collar (67), and the collar (67) is inserted into and fixed on the impeller on the support shaft (3).
A low-loss axial flow fan according to claim 1, characterized in that: the rear end of the impeller support shaft (3) is formed with a spline hole (34); The end is formed with a spline segment (41) matched with the spline hole (34).
A low-loss axial flow fan according to claim 4, characterized in that: a circular protrusion (641) is formed on the thrust piece on the front side of the first thrust bearing (64), and the circular protrusion ( 641) is pressed against the end face of the outer ring of the rear bearing (63).