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CN-117145784-B - Abnormal shape cross flow fan

CN117145784BCN 117145784 BCN117145784 BCN 117145784BCN-117145784-B

Abstract

The invention discloses a special-shaped cross flow fan which comprises a main shaft, a shell, an impeller, a motor and a shaft coupling, wherein the main shaft is connected with an output shaft of the motor through the shaft coupling, the shell is connected with the main shaft, the impeller is connected with the main shaft, the shell is of a C-shaped and axially asymmetric structure, the impeller is of an axially symmetric structure, and a part of the impeller is positioned in the shell. The shell comprises an upper end plate, an upper side wall, a lower side wall and a lower end plate which are sequentially and fixedly connected from top to bottom, wherein the upper end plate is a disc, a central hole of the upper end plate is connected with the upper end of the main shaft through a bearing, the upper end face of the upper side wall is fixedly connected with part of the circumference of the lower surface of the upper end plate, the lower end plate is a stepped disc, a central hole of the upper part of the lower end plate is connected with the lower end of the main shaft through a bearing, the lower end face of the lower side wall is fixedly connected with part of the circumference of the upper surface of the lower end plate, and the lower end face of the upper side wall is fixedly connected with the upper end face of the lower side wall. The invention greatly reduces the functional loss by changing the structures of the shell and the impeller.

Inventors

  • WANG XIAOYI
  • WANG CHENG
  • CHEN HANG
  • QIU ZHIZHEN
  • ZHANG YUHUA
  • WANG TAO

Assignees

  • 安徽工业大学

Dates

Publication Date
20260508
Application Date
20230925

Claims (6)

  1. 1. A special-shaped cross flow fan is characterized by comprising a main shaft (1), a shell (2), an impeller (3), a motor (4) and a coupler (5), wherein the main shaft (1) is connected with an output shaft of the motor (4) through the coupler (5), the shell (2) is connected with the main shaft (1), the impeller (3) is connected with the main shaft (1), the shell (2) is of a C-shaped and axially asymmetric structure, the impeller (3) is of an axisymmetric structure, a part of the impeller (3) is positioned in the shell (2), the shell (2) comprises an upper end plate (2 a), an upper side wall (2 b), a lower side wall (2C) and a lower end plate (2 d) which are sequentially and fixedly connected from top to bottom, the upper end plate (2 a) is a disc, a central hole of the upper end plate (2 b) is fixedly connected with the upper end of the main shaft (1) through a bearing, a central hole of the lower end plate (2 d) is a stepped disc, a central hole of the upper end plate is fixedly connected with the lower end of the main shaft (1) through a bearing, the central hole of the stepped disc is sleeved on the lower end plate (2 b) is fixedly connected with the upper end face (2C) of the motor (4) of the lower end flange (2C) of the motor, the upper end face is fixedly connected with the lower end face (2C) of the upper end plate (2C) of the lower end flange is fixedly connected with the upper end face of the upper end plate (2C) of the lower end of the motor, the outer diameter of the upper end plate (2 a) is smaller than that of the upper part of the lower end plate (2D); the upper side wall (2B) is a part of side surface of a right circular table surrounded by a thin plate, the outer circle radius of the upper end of the upper side wall is the same as the outer circle radius of an upper end plate (2 a), the lower side wall (2C) is a part of side surface of an inverted circular table surrounded by a thin plate, the outer circle radius of the lower end of the lower side wall is the same as the outer circle radius of a lower end plate (2D), the outer circle radius of the lower end of the upper side wall (2B) is the same as the outer circle radius of the upper end of a lower side wall (2C), the impeller (3) comprises an upper hub (3 a), a lower hub (3C) and a plurality of special-shaped blades (3B), the upper hub (3 a) is sleeved on a main shaft (1), the lower hub (3C) is sleeved on the main shaft (1), the upper end and the lower end of each special-shaped blade (3B) is fixedly connected with the outer circle surface of the upper hub (3 a) and the outer circle surface of the lower hub (3C), the special-shaped blades (3B) are uniformly distributed along the axis circumference of the main shaft (1), the special-shaped blades (3B) comprise an upper cross beam A, an upper blade B, a lower blade C, a lower blade D, the upper blade D and a lower blade D are uniformly distributed on the axis, the upper and the lower blade D are uniformly inclined from the upper surface to the upper surface and the lower blade C to the lower blade C are respectively right and the upper surface C and the lower blade C are connected to the upper surface C and the upper surface C The left lower end face is connected with the lower cross beam D, and the right lower end face of the upper leaf element B is connected with the right upper end face of the lower leaf element C.
  2. 2. The special-shaped cross flow fan as claimed in claim 1, wherein the fan-shaped angle of the upper side wall (2 b) occupying the circumference of the upper end plate (2 a) is the same as the fan-shaped angle of the lower side wall (2 c) occupying the circumference of the lower end plate (2 d), and the fan-shaped angles are the fan-shaped angles of the shell (2), and the fan-shaped angle of the shell (2) is more than 135 degrees and less than 180 degrees.
  3. 3. The special-shaped cross flow fan as claimed in claim 1, wherein the shell (2) further comprises a plurality of diversion square holes (2 e), and the diversion square holes (2 e) are uniformly distributed along the circumference of the connection between the upper side wall (2 b) and the lower side wall (2 c).
  4. 4. The special-shaped cross flow fan according to claim 1, wherein the thickness of the upper leaf element B gradually increases from left to right and from bottom to top, the thickness of the lower leaf element C gradually increases from left to bottom and from top to bottom, and the thickness of the right lower end surface of the upper leaf element B is the same as the thickness of the right upper end surface of the lower leaf element C.
  5. 5. The special-shaped cross flow fan according to claim 1, wherein the half cone angle of the right circular truncated cone of the upper side wall (2B) is A1, the half cone angle of the reverse circular truncated cone of the lower side wall (2C) is A2, the included angle of the upper leaf element B and the main shaft (1) is A1, and the included angle of the lower leaf element C and the main shaft (1) is A2.
  6. 6. The special-shaped cross flow fan according to claim 1, wherein the number N=8-16 of the special-shaped blades (3 b), and the thicknesses of the special-shaped blades (3 b) are the same.

Description

Abnormal shape cross flow fan Technical Field The invention belongs to the field of fluid machinery, and particularly relates to a special-shaped cross flow fan. Background Common fans can be classified into various types such as axial fans, centrifugal fans, and cross-flow fans in a blade shape and an air flow manner. The axial length of the cross flow fan is not limited, the length of the impeller can be arbitrarily selected according to different application scenes, the dynamic pressure of the cross flow fan is high, the discharged air flow is stable, and the stable air flow with high speed and wide range can be obtained. Therefore, the cross flow fan has wide application fields, and has application in the aspects of cooling and heat dissipation, ventilation, household appliances, aircrafts and the like. Among them, the fan-wing aircraft becomes a research hot spot because the cross flow fan has the greatest advantage over the conventional fan in that its length can be arbitrarily selected according to the requirements, which is consistent with the characteristics of the wing of the fixed-wing aircraft. Chinese patent CN212057507U (publication No. 2020.12.1) discloses a cross-flow fan with fixed impeller, wherein the rotation of the impeller has symmetry, the generated air flow needs to be guided by a guide cover to flow in a predetermined direction, and power consumption is inevitably generated for forcibly turning the air flow. Chinese patent CN113653653a (publication No. 2021.11.16) discloses a half-turn cross-flow fan impeller, whose rotation of blades has its unique asymmetric rotation characteristic, which can make the air flow automatically turn to a certain degree in the flowing process, so as to reduce the generated power consumption, but it has the problems of relatively complex transmission structure, increased power consumption and noise to a certain extent, and increased difficulty of practical application. Disclosure of Invention The invention aims to solve the problem of providing a special-shaped cross flow fan, which greatly reduces the functional loss by changing the structures of a shell and an impeller. Meanwhile, the cross flow fan can generate larger axial lifting force and radial thrust, thereby expanding the application range of the cross flow fan. The invention relates to a special-shaped cross flow fan which comprises a main shaft, a shell, an impeller, a motor and a shaft coupling, wherein the main shaft is connected with an output shaft of the motor through the shaft coupling, the shell is connected with the main shaft, the impeller is connected with the main shaft, the shell is of a C-shaped and axially asymmetric structure, the impeller is of an axially symmetric structure, and one part of the impeller is positioned in the shell. The shell comprises an upper end plate, an upper side wall, a lower side wall and a lower end plate which are sequentially and fixedly connected from top to bottom, wherein the upper end plate is a disc, a central hole of the upper end plate is fixedly connected with the upper end of a main shaft through a bearing, the upper end face of the upper side wall is fixedly connected with part of the circumference of the lower surface of the upper end plate, the lower end plate is a stepped disc, a central hole of the upper part of the lower end plate is connected with the lower end of the main shaft through a bearing, a flange of the lower part of the lower end plate is sleeved outside the coupler and is fixedly connected with a motor, the lower end face of the lower side wall is fixedly connected with part of the circumference of the upper surface of the lower end plate, the lower end face of the upper side wall is fixedly connected with the upper end face of the lower side wall, and the outer diameter of the upper end plate is smaller than the outer diameter of the upper part of the lower end plate. Further, the upper side wall is a part of side surface of a right circular table surrounded by the thin plate, the outer circle radius of the upper end of the upper side wall is the same as that of the upper end plate, the lower side wall is a part of side surface of an inverted circular table surrounded by the thin plate, the outer circle radius of the lower end of the lower side wall is the same as that of the lower end plate, and the outer circle radius of the lower end of the upper side wall is the same as that of the upper end of the lower side wall. Further, the sector angle of the upper side wall occupying the circumference of the upper end plate is the same as the sector angle of the lower side wall occupying the circumference of the lower end plate, and the sector angles of the outer shell are more than 135 degrees and less than 180 degrees. Further, the shell further comprises a plurality of square diversion holes, and the square diversion holes are uniformly distributed along the circumference of the connection between the upper side wall and the