Fan mounting structure

Abstract

The utility model discloses a fan installation structure which comprises a motor, a first fan and a second fan, a first bearing seat assembly and a second bearing seat assembly are coaxially installed at the two ends of the motor respectively, and connecting shafts are rotatably installed in the first bearing seat assembly and the second bearing seat assembly. A power output shaft of the motor is in transmission connection with a power input end of the connecting shaft; the first draught fan is installed at the end of the first bearing seat assembly, the second draught fan is installed at the end of the second bearing seat assembly, a connecting shaft in the first bearing seat assembly is in transmission connection with a draught fan impeller in the first draught fan, and a connecting shaft in the second bearing seat assembly is in transmission connection with a draught fan impeller in the second draught fan. By arranging the connecting shaft, the motor spindle and the impeller are not directly connected, the connecting shaft is matched with the first bearing, the second bearing and the shell, radial jumping force and axial jumping force generated by rotation of the fan impeller are directly borne through the connecting shaft, acting force is prevented from being transmitted to the motor spindle, and the running stability of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and more specifically to a fan installation structure. Background Art

[0002] A fan generally uses rotary power to drive the impeller to rotate, and uses the rotation of the impeller to push and transport the airflow. In the existing technology, the output shaft of the motor is generally directly connected to the fan impeller for coaxial transmission. Affected by the manufacturing and installation accuracy of the impeller, when the impeller rotates at high speed, it may produce a certain radial runout or axial runout, or radial runout and axial runout may exist at the same time. The force generated by this runout will directly act on the motor main shaft, thereby accelerating the damage to the motor main shaft bearing. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to provide a fan installation structure that prevents the impeller bounce force and the axial force generated by the fluid from being directly transmitted to the motor main shaft, thereby effectively improving the stability of the motor.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a fan installation structure, comprising a motor, a first fan and a second fan, a first bearing seat assembly and a second bearing seat assembly are coaxially installed on both ends of the motor, a connecting shaft is rotatably installed in the first bearing seat assembly and the second bearing seat assembly, and the power output shaft of the motor is transmission-connected to the power input end of the connecting shaft; the first fan is installed on the end of the first bearing seat assembly, and the second fan is installed on the end of the second bearing seat assembly, the power output end of the connecting shaft in the first bearing seat assembly is transmission-connected to the fan impeller in the first fan, and the power output end of the connecting shaft in the second bearing seat assembly is transmission-connected to the fan impeller in the second fan.

[0005] The above-mentioned fan mounting structure, the first bearing seat assembly and the second bearing seat assembly have the same structure, the first bearing seat assembly includes a shell, a first bearing and a second bearing, the connecting shaft is coaxially installed in the shell, the first bearing and the second bearing are respectively installed on the two ends of the connecting shaft, and the first bearing and the second bearing are respectively arranged in the two ends of the shell; the first end of the shell of the first bearing seat assembly is connected to one end of the motor, and the second end of the shell of the first bearing seat assembly is connected to the fan cover of the first fan; the first end of the shell of the second bearing seat assembly is connected to the other end of the motor, and the second end of the shell of the two bearing seat assemblies is connected to the fan cover of the second fan.

[0006] In the above-mentioned fan installation structure, a connecting flange is provided on the first end portion of the housing, and the housing is fixedly connected to the end portion of the motor through the connecting flange.

[0007] The above-mentioned fan mounting structure is provided with a positioning connection section from the second end portion of the shell to the middle position thereof, the outer diameter of the positioning connection section is smaller than the outer diameter of the shell, the connection between the positioning connection section and the shell forms a positioning platform, and the positioning platform is located between the first bearing and the second bearing, the positioning connection section is inserted into the fan cover, and the positioning platform is attached to and fixedly connected to the outer wall of the fan cover.

[0008] In the above-mentioned fan mounting structure, a positioning shoulder is provided on the first end of the connecting shaft, and one side of the inner ring of the second bearing is in contact with the positioning shoulder; an inner positioning sleeve is provided on the connecting shaft, and the inner positioning sleeve is located between the first bearing and the second bearing, and the two ends of the inner positioning sleeve are respectively in contact with the inner ring of the first bearing and the inner ring of the second bearing.

[0009] In the above-mentioned fan mounting structure, a clamping ring is connected to the second end of the connecting shaft, and the clamping ring presses against the inner ring of the first bearing. The inner ring of the first bearing, the inner positioning sleeve and the inner ring of the second bearing are pressed against the positioning shaft shoulder by the clamping ring.

[0010] In the above-mentioned fan mounting structure, an outer positioning sleeve is provided between the first bearing and the second bearing, and both end portions of the outer positioning sleeve are respectively fitted with the outer ring of the first bearing and the outer ring of the second bearing, and there is a gap between the outer positioning sleeve and the inner wall of the outer shell.

[0011] The above-mentioned fan mounting structure has an oil filling hole and an exhaust hole on the outer shell, an oil filling nozzle is installed on the oil filling hole, and an exhaust screw is installed on the exhaust hole. The oil filling nozzle and the exhaust screw are both fluidically connected to the gap between the outer positioning sleeve and the outer shell, and a through hole is opened on the side wall of the outer positioning sleeve.

[0012] The above-mentioned fan mounting structure is characterized in that a fixing ring is fixedly installed in the first end of the outer shell, one side of the outer ring of the second bearing is fitted on the end of the fixing ring, and there is a gap between the inner circumferential surface of the fixing ring and the outer circumferential surface of the connecting shaft, a first sealing ring is installed in the fixing ring, and the inner wall of the first sealing ring is sealingly fitted on the outer circumferential surface of the connecting shaft; a retaining ring is formed on the second end of the outer shell, and a second sealing ring is arranged in the second end of the outer shell, the inner wall of the second sealing ring is tightly fitted on the outer circumferential surface of the connecting shaft, and the side wall of the second sealing ring is fitted on the retaining ring.

[0013] In the above-mentioned fan mounting structure, a transmission hole is provided on the power input end face of the connecting shaft, and the power output shaft of the motor extends into the transmission hole and is transmission-connected to the connecting shaft; the length of the motor power output shaft extending into the transmission hole is less than the depth of the transmission hole.

[0014] The technical solution of the utility model has achieved the following beneficial technical effects:

[0015] By setting up a connecting shaft, the motor main shaft and the impeller are not directly connected. In conjunction with the first bearing, the second bearing and the housing, the radial runout force and axial runout force generated by the rotation of the fan impeller are directly borne through the connecting shaft, avoiding the force from being transmitted to the motor main shaft bearing, thereby improving the stability of the motor operation; by optimizing the shape of the housing, the connection rigidity between the motor and the fan cover is improved, which is conducive to ensuring the coaxiality of the motor main shaft and the connecting shaft, and further improving the operation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic cross-sectional view of the overall structure of the fan of the utility model;

[0017] Figure 2 A schematic cross-sectional view of the utility model showing a connecting shaft installed in a housing;

[0018] Figure 3 A schematic cross-sectional view of the connecting shaft of the utility model;

[0019] Figure 4 A schematic diagram of the three-dimensional structure of the utility model showing that the connecting shaft is installed in the housing.

[0020] The reference numerals in the figure are as follows: 100-first fan; 200-second fan; 300-first bearing seat assembly; 400-second bearing seat assembly; 1-motor; 2-fan cover; 3-fan impeller; 4-housing; 5-first bearing; 6-connecting shaft; 7-transmission hole; 8-second bearing; 9-inner positioning sleeve; 10-outer positioning sleeve; 11-fixing ring; 12-first sealing ring; 13-second sealing ring; 14-pressure ring; 15-connecting flange; 16-oiling nozzle; 17-exhaust screw; 18-retaining ring; 19-positioning connecting section; 20-positioning platform. DETAILED DESCRIPTION

[0021] The fan installation structure in this embodiment is as follows: Figure 1As shown, it includes a motor 1, a first fan 100 and a second fan 200. A first bearing seat assembly 300 and a second bearing seat assembly 400 are coaxially mounted on both ends of the motor 1. A connecting shaft 6 is rotatably mounted in the first bearing seat assembly 300 and the second bearing seat assembly 400. The power output shaft of the motor 1 is transmission-connected to the power input end of the connecting shaft 6. The first fan 100 is mounted on the end of the first bearing seat assembly 300, and the second fan 200 is mounted on the end of the second bearing seat assembly 400. The power output end of the connecting shaft 6 in the first bearing seat assembly 300 is connected to the fan impeller 3 in the first fan 100, and the power output end of the connecting shaft 6 in the second bearing seat assembly 400 is connected to the fan impeller 3 in the second fan 200. By setting the connecting shaft 6, the main shaft of the motor 1 is not directly connected to the impeller. In conjunction with the first bearing 5, the second bearing 8 and the outer casing 4, the radial runout force and axial runout force generated by the rotation of the fan impeller 3 are directly borne through the connecting shaft 6, thereby avoiding the force being transmitted to the main shaft of the motor 1 and improving the stability of the operation of the motor 1.

[0022] like Figure 1-2 As shown, the first bearing seat assembly 300 and the second bearing seat assembly 400 have the same structure, the first bearing seat assembly 300 includes a shell 4, a first bearing 5 and a second bearing 8, the connecting shaft 6 is coaxially installed in the shell 4, the first bearing 5 and the second bearing 8 are respectively installed on the two ends of the connecting shaft 6, and the first bearing 5 and the second bearing 8 are respectively arranged in the two ends of the shell 4; the first end of the shell 4 of the first bearing seat assembly 300 is connected to one end of the motor 1, and the second end of the shell 4 of the first bearing seat assembly 300 is connected to the fan cover 2 of the first fan 100; the first end of the shell 4 of the second bearing seat assembly 400 is connected to the other end of the motor 1, and the second end of the shell 4 of the second bearing seat assembly 400 is connected to the fan cover 2 of the second fan 200.

[0023] like Figure 2 As shown, a connecting flange 15 is provided on the first end portion of the housing 4, and the housing 4 is fixedly connected to the end portion of the motor 1 through the connecting flange 15. The provision of the connecting flange 15 is conducive to improving the connection strength between the housing 4 and the motor 1; a positioning connecting section 19 is provided from the second end portion of the housing 4 to the middle position thereof, and the outer diameter of the positioning connecting section 19 is smaller than the outer diameter of the housing 4. A positioning platform 20 is formed at the connection between the positioning connecting section 19 and the housing 4, and the positioning platform 20 is located between the first bearing 5 and the second bearing 8. The positioning connecting section 19 is inserted into the fan cover 2, and the positioning platform 20 is adhered to and fixedly connected to the outer wall of the fan cover 2, as shown Figure 1As shown, after the positioning platform 20 extends into the fan cover 2, the end of the positioning platform 20 extends into the fan impeller 3, that is, the first bearing 5 is located in the fan impeller 3, and the end power output end of the connecting shaft 6 is fixedly connected to the fan impeller 3 through the connecting cover. After the connecting cover is connected to the connecting shaft 6, it extends in the direction of the motor 1 and covers the positioning platform 20, so that it can be connected to the fan impeller 3.

[0024] like Figure 2 As shown, a positioning shoulder is provided on the first end of the connecting shaft 6, and one side of the inner ring of the second bearing 8 is fitted on the positioning shoulder; an inner positioning sleeve 9 is sleeved on the connecting shaft 6, and the inner positioning sleeve 9 is located between the first bearing 5 and the second bearing 8, and the two ends of the inner positioning sleeve 9 are respectively fitted with the inner ring of the first bearing 5 and the inner ring of the second bearing 8; a clamping ring 14 is connected to the second end of the connecting shaft 6, and the clamping ring 14 is pressed against the inner ring of the first bearing 5, and the inner ring of the first bearing 5, the inner positioning sleeve 9 and the inner ring of the second bearing 8 are pressed against the positioning shoulder by the clamping ring 14; an outer positioning sleeve 10 is provided between the first bearing 5 and the second bearing 8, and the two end ends of the outer positioning sleeve 10 are respectively fitted with the outer ring of the first bearing 5 and the outer ring of the second bearing 8, and there is a gap between the outer positioning sleeve 10 and the inner wall of the outer shell 4. The inner positioning sleeve 9 and the outer positioning sleeve 10 are provided to designate and position the first bearing 5 and the second bearing 8, thereby improving the axial supporting force.

[0025] like Figure 2 As shown, an oil filling hole and an exhaust hole are provided on the outer shell 4, an oil filling nozzle 16 is installed on the oil filling hole, and an exhaust screw 17 is installed on the exhaust hole. The oil filling nozzle 16 and the exhaust screw 17 are both in fluid communication with the gap between the outer positioning sleeve 10 and the outer shell 4, and a through hole is provided on the side wall of the outer positioning sleeve 10.

[0026] like Figure 2 As shown, a fixing ring 11 is fixedly installed in the first end of the outer shell 4, and one side of the outer ring of the second bearing 8 is fitted on the end of the fixing ring 11. There is a gap between the inner circumferential surface of the fixing ring 11 and the outer circumferential surface of the connecting shaft 6. A first sealing ring 12 is installed in the fixing ring 11, and the inner wall of the first sealing ring 12 is sealingly fitted on the outer circumferential surface of the connecting shaft 6; a retaining ring 18 is formed on the second end portion of the outer shell 4, and a second sealing ring 13 is provided in the second end of the outer shell 4, and the inner wall of the second sealing ring 13 is tightly fitted on the outer circumferential surface of the connecting shaft 6, and the side wall of the second sealing ring 13 is fitted on the retaining ring 18.

[0027] like Figure 2-3As shown, a transmission hole 7 is formed on the power input end face of the connecting shaft 6. The power output shaft of the motor 1 extends into the transmission hole 7 and is in transmission connection with the connecting shaft 6. The length of the power output shaft of the motor 1 extending into the transmission hole 7 is less than the depth of the transmission hole 7. In practical applications, the transmission hole 7 can be a spline hole or a flat key hole. After the power output shaft of the motor 1 is inserted into the transmission hole 7, a slight axial clearance exists between the connecting shaft 6 and the power output shaft of the motor 1. This prevents the axial force generated by the impeller's runout and the axial force generated by the fluid from directly acting on the main shaft of the motor 1, thereby improving the service life of the main shaft bearing of the motor 1.

[0028] The fan installation structure in this embodiment has better use effect when applied in complex and changeable use scenarios, such as when applied in scenes with vibration or motion. When this fan installation structure is applied to a sanitation vehicle, it can greatly improve the stability of the motor 1 and ensure the service life of the motor 1. Since the sanitation vehicle is running on the road, the entire fan is in a complex and changeable multi-dimensional motion environment, and the fan impeller 3 is in a high-speed rotation state. On the one hand, the fan impeller 3 is affected by the manufacturing accuracy and assembly accuracy, and will produce a certain axial or radial runout, affecting the service life of the motor. On the other hand, since the fan impeller 3 rotates, in the rotational inertia Under the action, the fan impeller 3 has a tendency to maintain its own stability. With each irregular vibration around it, the main shaft of the motor 1 will bear additional force, further aggravating the damage to the main shaft bearing of the motor. The present invention changes the rigid axial connection between the main shaft of the motor 1 and the fan impeller 3 into a non-rigid axial connection by setting a connecting shaft 6 to cooperate with the transmission hole 7, thereby blocking the direct transmission of the axial force. The radial strength of the connecting shaft 6 is greatly improved by adding the first bearing 5, the second bearing 8 and the outer shell 4. The shape of the outer shell 4 is optimized to ensure the stability of the operation of the fan impeller 3 and the stability and service life of the motor 1.

[0029] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the claims of this patent application.

Claims

1. The fan installation structure is characterized by: The invention comprises a motor (1), a first fan (100) and a second fan (200), wherein a first bearing seat assembly (300) and a second bearing seat assembly (400) are coaxially mounted on both ends of the motor (1), a connecting shaft (6) is rotatably mounted in the first bearing seat assembly (300) and the second bearing seat assembly (400), and a power output shaft of the motor (1) is transmission-connected to a power input end of the connecting shaft (6); the first fan (100) is mounted on the end of the first bearing seat assembly (300), and the second fan (200) is mounted on the end of the second bearing seat assembly (400), the power output end of the connecting shaft (6) in the first bearing seat assembly (300) is transmission-connected to a fan impeller (3) in the first fan (100), and the power output end of the connecting shaft (6) in the second bearing seat assembly (400) is transmission-connected to a fan impeller (3) in the second fan (200).

2. The fan installation structure according to claim 1, characterized in that: The first bearing seat assembly (300) and the second bearing seat assembly (400) have the same structure. The first bearing seat assembly (300) comprises a housing (4), a first bearing (5) and a second bearing (8). The connecting shaft (6) is coaxially mounted in the housing (4). The first bearing (5) and the second bearing (8) are mounted on both ends of the connecting shaft (6) respectively. The first bearing (5) and the second bearing (8) are respectively arranged in both ends of the housing (4). The first end of the housing (4) of the first bearing seat assembly (300) is connected to one end of the motor (1), and the second end of the housing (4) of the first bearing seat assembly (300) is connected to the fan cover (2) of the first fan (100). The first end of the housing (4) of the second bearing seat assembly (400) is connected to the other end of the motor (1), and the second end of the housing (4) of the second bearing seat assembly (400) is connected to the fan cover (2) of the second fan (200).

3. The fan installation structure according to claim 2, characterized in that: A connecting flange (15) is provided on the first end portion of the housing (4), and the housing (4) is fixedly connected to the end portion of the motor (1) via the connecting flange (15).

4. The fan installation structure according to claim 2, characterized in that: A positioning connection section (19) is provided from the second end portion to the middle position of the housing (4), the outer diameter of the positioning connection section (19) is smaller than the outer diameter of the housing (4), a positioning platform (20) is formed at the connection between the positioning connection section (19) and the housing (4), and the positioning platform (20) is located between the first bearing (5) and the second bearing (8), the positioning connection section (19) is inserted into the fan cover (2), and the positioning platform (20) is attached to and fixedly connected to the outer wall of the fan cover (2).

5. The fan installation structure according to claim 2, characterized in that: A positioning shoulder is provided on the first end of the connecting shaft (6), and one side of the inner ring of the second bearing (8) is in contact with the positioning shoulder; an inner positioning sleeve (9) is sleeved on the connecting shaft (6), and the inner positioning sleeve (9) is located between the first bearing (5) and the second bearing (8), and the two ends of the inner positioning sleeve (9) are respectively in contact with the inner ring of the first bearing (5) and the inner ring of the second bearing (8).

6. The fan installation structure according to claim 5, characterized in that: A clamping ring (14) is connected to the second end of the connecting shaft (6), and the clamping ring (14) presses against the inner ring of the first bearing (5). The inner ring of the first bearing (5), the inner positioning sleeve (9) and the inner ring of the second bearing (8) are pressed against the positioning shaft shoulder by the clamping ring (14).

7. The fan installation structure according to claim 5, characterized in that: An outer positioning sleeve (10) is provided between the first bearing (5) and the second bearing (8), and both ends of the outer positioning sleeve (10) are respectively fitted with the outer ring of the first bearing (5) and the outer ring of the second bearing (8), and a gap is provided between the outer positioning sleeve (10) and the inner wall of the housing (4).

8. The fan installation structure according to claim 7, characterized in that: The outer shell (4) is provided with an oil filling hole and an exhaust hole, the oil filling hole is provided with an oil filling nozzle (16), and the exhaust hole is provided with an exhaust screw (17), the oil filling nozzle (16) and the exhaust screw (17) are both in fluid communication with the gap between the outer positioning sleeve (10) and the outer shell (4), and a through hole is provided through the side wall of the outer positioning sleeve (10).

9. The fan installation structure according to claim 2, characterized in that: A fixing ring (11) is fixedly installed in the first end of the housing (4), one side of the outer ring of the second bearing (8) is fitted on the end of the fixing ring (11), and a gap is provided between the inner circumferential surface of the fixing ring (11) and the outer circumferential surface of the connecting shaft (6). A first sealing ring (12) is installed in the fixing ring (11), and the inner wall of the first sealing ring (12) is sealingly fitted on the outer circumferential surface of the connecting shaft (6); a retaining ring (18) is formed on the second end of the housing (4), and a second sealing ring (13) is provided in the second end of the housing (4), the inner wall of the second sealing ring (13) is tightly fitted on the outer circumferential surface of the connecting shaft (6), and the side wall of the second sealing ring (13) is fitted on the retaining ring (18).

10. The fan installation structure according to claim 1, characterized in that: A transmission hole (7) is provided on the power input end face of the connecting shaft (6), and the power output shaft of the motor (1) extends into the transmission hole (7) and is in transmission connection with the connecting shaft (6); the length of the power output shaft of the motor (1) extending into the transmission hole (7) is less than the depth of the transmission hole (7).

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