A two-stage impeller series axial flow fan

Abstract

The present invention discloses a two-stage impeller series axial flow fan, including a wind tube, wherein two impellers arranged on the left and right are arranged in the wind tube, an air guide portion is arranged between the two impellers, and the air guide portion is fixed to the middle of the wind tube through a plurality of columns; a driving mechanism is arranged in the air guide portion, and the driving mechanism includes an axially arranged driving shaft, and two impellers are respectively fixed at both ends of the driving shaft, and the driving shaft is connected to a motor, and the motor can rotate forward and reverse. The present invention arranges two impellers arranged in series to effectively improve the pressurization effect of the gas and can meet the requirements of various working conditions; and the motor can rotate forward and reverse and the air guide portion is arranged between the two impellers to realize the wind direction switching of the fan.

Description

Technical Field

[0001] The invention relates to the technical field of fans, and in particular to a two-stage impeller series-connected axial flow fan. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and deliver gas. It is a driven fluid machine. Fan is a customary abbreviation for gas compression and gas delivery machinery in China. The existing fan structure generally includes a wind tube, which is equipped with a motor and an impeller. The existing fan impeller generally has only one, and the gas pressure is limited, which cannot meet the requirements of certain working conditions. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a two-stage impeller series axial flow fan, which has two impellers arranged in series to effectively improve the gas pressurization effect and meet the needs of various working conditions; and the motor can rotate forward and reverse and an air guide part is arranged between the two impellers to realize the wind direction switching of the fan.

[0004] The solution of the present invention to solve the technical problem is:

[0005] A two-stage impeller series axial flow fan comprises a wind tube, wherein two impellers are arranged on the left and right inside the wind tube, an air guide portion is arranged between the two impellers, and the air guide portion is fixed to the middle part of the wind tube through a plurality of columns; a driving mechanism is arranged inside the air guide portion, and the driving mechanism comprises an axially arranged driving shaft, and two impellers are respectively fixed to the two ends of the driving shaft.

[0006] The driving mechanism comprises an inner gear ring fixed on the driving shaft, a gear is meshed on the lower side of the inner gear ring, the gear is fixed on the motor shaft of the motor, the motor is fixed on the bracket, and the bracket is fixed inside the air guide part.

[0007] The impeller comprises an integrally formed impeller base circle and a conical portion arranged outside the impeller base circle; a plurality of circumferentially evenly distributed blades are fixed on the outer wall of the impeller base circle; a shaft connecting seat arranged coaxially therewith is formed inside the impeller base circle, and the end of the drive shaft is fixedly connected to the shaft connecting seat;

[0008] The air guide portion includes an integrally formed left cone portion, a straight cylinder portion, and a right cone portion, which is arranged to be large on the left and small on the right. The left end of the left cone portion extends into the impeller base circle on the left, and the right end of the right cone portion extends into the impeller base circle on the right; the outer diameter of the straight cylinder portion is less than or equal to the outer diameter of the impeller base circle.

[0009] A left air guide cone sleeve is formed on the outer wall of the left cone portion and is arranged obliquely upward, and a left connecting sleeve in a circular ring shape is formed on the left end of the left air guide cone sleeve;

[0010] A right air guide cone sleeve is formed on the outer wall of the right cone portion and is arranged obliquely upward, and a right connecting sleeve in a circular ring shape is formed on the right end of the right air guide cone sleeve;

[0011] The left connecting sleeve connects to the right end of the impeller base circle on the left side, and the right connecting sleeve connects to the left end of the impeller base circle on the right side;

[0012] The outer diameters of the left and right adapter sleeves are equal to the outer diameter of the impeller base circle.

[0013] A bearing seat is formed on the inner wall of the right cone part and the left cone part respectively, and the driving shaft is rotatably connected to the bearing seat through the bearing; a retaining ring is respectively provided at both ends of the bearing, and the retaining ring is inserted into the groove of the driving shaft.

[0014] The column is a quadrangular column, two edges of which face the two opening ends of the wind tube respectively;

[0015] The motor can rotate forward and reverse.

[0016] The outstanding effect of the present invention is that compared with the prior art, the two impellers arranged in series can effectively improve the gas pressurization effect and meet the needs of various working conditions; and the motor can rotate forward and reverse and the air guide part is arranged between the two impellers to realize the wind direction switching of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A half-section view of the present invention;

[0018] Figure 2 for Figure 1 A partial enlarged view of A. DETAILED DESCRIPTION

[0019] For example, see Figure 1 to Figure 2 As shown, a two-stage impeller series axial flow fan includes a wind tube 1, wherein two impellers 2 are arranged on the left and right inside the wind tube 1, an air guide portion 3 is arranged between the two impellers 2, and the air guide portion 3 is fixed to the middle part of the wind tube 1 through a plurality of columns 4; a driving mechanism 5 is arranged inside the air guide portion 3, and the driving mechanism 5 includes an axially arranged driving shaft 51, and the two impellers 2 are respectively fixed to the two ends of the driving shaft 51.

[0020] Furthermore, the driving mechanism 5 includes an inner gear ring 52 fixed on the driving shaft 51, and a gear 53 is meshed on the lower side of the inner gear ring 52. The gear 53 is fixed on the motor shaft of the motor 54. The motor 54 is fixed on the bracket 55, and the bracket 55 is fixed inside the air guide part 3.

[0021] Furthermore, the impeller 2 includes an integrally formed impeller base circle 21 and a conical portion 22 arranged outside the impeller base circle 21; a plurality of circumferentially evenly distributed blades 23 are fixed on the outer wall of the impeller base circle 21; a shaft connecting seat 24 coaxially arranged therewith is formed inside the impeller base circle 21, and the end of the drive shaft 51 is fixedly connected to the shaft connecting seat 24;

[0022] The air guide portion 3 includes an integrally formed left cone portion 31 that is small on the left and large on the right, a straight cylinder portion 32, and a right cone portion 33 that is large on the left and small on the right. The left end of the left cone portion 31 extends into the impeller base circle 21 on the left, and the right end of the right cone portion 33 extends into the impeller base circle 21 on the right; the outer diameter of the straight cylinder portion 32 is less than or equal to the outer diameter of the impeller base circle 21.

[0023] Furthermore, a left air guide cone sleeve 34 disposed obliquely upward is formed on the outer wall of the left cone portion 31, and a left annular connecting sleeve 35 is formed at the left end of the left air guide cone sleeve 34;

[0024] The outer wall of the right cone portion 33 is formed with a right air guide cone sleeve 36 which is arranged obliquely upward, and the right end of the right air guide cone sleeve 36 is formed with a right connecting sleeve 37 in a circular ring shape;

[0025] The left connecting sleeve 35 connects to the right end of the impeller base circle 21 on the left side, and the right connecting sleeve 37 connects to the left end of the impeller base circle 21 on the right side;

[0026] The outer diameters of the left adapter sleeve 35 and the right adapter sleeve 37 are equal to the outer diameter of the impeller base circle 21 .

[0027] Furthermore, a bearing seat 38 is formed on the inner wall of the right cone portion 33 and the left cone portion 31, and the drive shaft 51 is rotatably connected to the bearing seat 38 through a bearing 61; a retaining ring 62 is provided at each end of the bearing 61, and the retaining ring 62 is inserted into the groove of the drive shaft 51.

[0028] Furthermore, the column 4 is a quadrangular column, and two edges of the column 4 face the two opening ends of the wind tube 1 respectively;

[0029] The motor 54 can rotate forward and reverse.

[0030] Working principle: the motor 54 drives the gear 53 to rotate, the gear 53 drives the driving shaft 51 to rotate through the inner gear ring 52, and the driving shaft 51 drives the two impellers 2 to rotate synchronously, tightening the pressurization effect of the two impellers, which can effectively increase the output gas pressure;

[0031] The fan can supply or exhaust air by rotating the motor forward or reverse.

[0032] Finally, the above implementation modes are only used to illustrate the present invention, and are not intended to limit the present invention. Ordinary technicians in the relevant technical field may 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. The scope of patent protection of the present invention should be defined by the claims.

Claims

1. A two-stage impeller series axial flow fan, comprising a wind tube (1), characterized in that: The wind tube (1) is provided with two impellers (2) arranged on the left and right, an air guide portion (3) is provided between the two impellers (2), and the air guide portion (3) is fixed to the middle of the wind tube (1) via a plurality of columns (4); a driving mechanism (5) is provided in the air guide portion (3), the driving mechanism (5) comprises an axially arranged driving shaft (51), and the two impellers (2) are respectively fixed to the two ends of the driving shaft (51); The driving mechanism (5) comprises an inner gear ring (52) fixed on a driving shaft (51), a gear (53) meshing on the lower side of the inner gear ring (52), the gear (53) being fixed on a motor shaft of a motor (54), the motor (54) being fixed on a bracket (55), and the bracket (55) being fixed inside the air guide portion (3); The impeller (2) comprises an integrally formed impeller base circle (21) and a conical portion (22) arranged outside the impeller base circle (21); a plurality of circumferentially evenly distributed fan blades (23) are fixed to the outer wall of the impeller base circle (21); a shaft connecting seat (24) coaxially arranged therewith is formed inside the impeller base circle (21), and an end portion of the drive shaft (51) is fixedly connected to the shaft connecting seat (24); The air guide portion (3) comprises an integrally formed left cone portion (31) which is arranged smaller on the left and larger on the right, a straight cylinder portion (32), and a right cone portion (33) which is arranged larger on the left and smaller on the right; the left end of the left cone portion (31) extends into the impeller base circle (21) on the left, and the right end of the right cone portion (33) extends into the impeller base circle (21) on the right; the outer diameter of the straight cylinder portion (32) is less than or equal to the outer diameter of the impeller base circle (21); A left air guide cone sleeve (34) disposed obliquely upward is formed on the outer wall of the left cone portion (31), and a left annular connecting sleeve (35) is formed at the left end of the left air guide cone sleeve (34); A right air guide cone sleeve (36) disposed obliquely upward is formed on the outer wall of the right cone portion (33), and a right connecting sleeve (37) in the shape of a circular ring is formed at the right end of the right air guide cone sleeve (36); The left connecting sleeve (35) connects to the right end of the left impeller base circle (21), and the right connecting sleeve (37) connects to the left end of the right impeller base circle (21); The outer diameters of the left connecting sleeve (35) and the right connecting sleeve (37) are equal to the outer diameter of the impeller base circle (21); A bearing seat (38) is formed on the inner wall of the right cone portion (33) and the left cone portion (31), and the drive shaft (51) is rotatably connected to the bearing seat (38) via a bearing (61); a retaining ring (62) is provided at each end of the bearing (61), and the retaining ring (62) is inserted into a groove of the drive shaft (51).

2. A two-stage impeller series axial flow fan according to claim 1, characterized in that: The column (4) is a quadrangular column, and two edges of the column (4) face the two opening ends of the wind tube (1) respectively; The motor (54) can rotate forward and reverse.

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