Cabinet type centrifugal fan with external bearings on two sides

Abstract

The utility model discloses a cabinet type centrifugal fan with external bearings on two sides. The cabinet type centrifugal fan comprises an outer box body, an impeller shell, a centrifugal impeller, a bearing seat, a transmission shaft and a driving mechanism, first maintenance holes with the inner diameter larger than the outer diameter of the centrifugal impeller are formed in the two sides of the outer box body, and second maintenance holes with the inner diameter larger than the outer diameter of the centrifugal impeller are formed in the two sides of the impeller shell; the two sides of the outer box body are detachably connected with bearing fixing discs, and the bearing fixing discs block the first maintenance holes. The bearing seat is detachably installed on the side, away from the outer box body, of the bearing fixing disc, the second maintenance hole, the first maintenance hole, the bearing seat and the transmission shaft are coaxially arranged, and the two ends of the transmission shaft penetrate through the bearing fixing disc and then are connected with the bearing seat. The maintenance holes with the inner diameter larger than the outer diameter of the centrifugal impeller are formed in the outer box body and the impeller shell, when maintenance is needed, the centrifugal impeller and the transmission shaft can be pulled out through the maintenance holes, the outer box body and the impeller shell do not need to be disassembled, the disassembly process of the centrifugal impeller is simplified, and the maintenance cost is reduced. And the centrifugal impeller can be conveniently repaired and maintained, and the repairing and maintaining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal fans, in particular to a double-sided bearing external cabinet type centrifugal fan. Background Art

[0002] Cabinet type centrifugal fan is a high efficiency, low noise box type centrifugal fan. The product consists of low noise forward inclined multi-blade centrifugal fan, motor, bearing, transmission parts, silencer box, etc.

[0003] A multi-blade cabinet fan disclosed in a Chinese patent with publication number CN207583657U has the following technical points: it includes an outer box body, an inner frame, an impeller shell, a centrifugal impeller, a bearing seat, a transmission shaft, and a motor. The inner frame is installed in the outer box body, the impeller shell is fixed in the inner frame, the transmission shaft passes through the impeller shell and is supported by bearing seats installed on opposite sides of the inner frame, the impeller is located in the impeller shell and fixed on the transmission shaft, one end of the transmission shaft extends out of the impeller shell and is connected to the motor for transmission, the impeller is a multi-blade double-inlet impeller, the outer box body includes a box body frame and a plurality of box plates detachably mounted on the box body frame, an air outlet is provided on the side of the outer box body corresponding to the exhaust port of the impeller shell, an air inlet is provided on the outer box body, and the inner surface of the box plate is covered with sound-absorbing material. The disadvantage of this structure is that when the centrifugal impeller needs to be disassembled and repaired, the drive shaft must be separated from the motor first, and then the inner frame, impeller shell, centrifugal impeller, bearing seat, and drive shaft must be separated before the centrifugal impeller can be finally separated. The entire disassembly process is relatively cumbersome, so there are problems of inconvenient maintenance and low efficiency. Utility Model Content

[0004] The utility model provides a cabinet-type centrifugal fan with external bearings on both sides, so as to solve the technical problems of inconvenient maintenance and low efficiency of the existing cabinet-type centrifugal fans.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A double-sided bearing external cabinet centrifugal fan comprises: an outer box body, an impeller shell, a centrifugal impeller, a bearing seat, a transmission shaft and a driving mechanism; first maintenance holes with an inner diameter larger than the outer diameter of the centrifugal impeller are opened on both sides of the outer box body, and second maintenance holes with an inner diameter larger than the outer diameter of the centrifugal impeller are opened on both sides of the impeller shell; bearing fixing plates are detachably connected to both sides of the outer box body, and the bearing fixing plates block the first maintenance holes; the bearing seat is detachably installed on the side of the bearing fixing plate away from the outer box body, the second maintenance hole, the first maintenance hole, the bearing seat and the transmission shaft are coaxially arranged, and both ends of the transmission shaft pass through the bearing fixing plates and are connected to the bearing seats.

[0007] Furthermore, the cabinet-type centrifugal fan also includes an inner frame, the inner frame is installed in the outer box body, the impeller shell is installed in the outer box body, and the centrifugal impeller is installed on the transmission shaft and in the impeller shell.

[0008] Furthermore, the two sides of the impeller shell are detachably connected with air inlet rings, which are coaxially arranged with the second maintenance hole. One end of the air inlet ring is detachably connected to the outer side of the impeller shell, and the other end is inserted into the second maintenance hole and corresponds to the end face of the centrifugal impeller.

[0009] Furthermore, the driving mechanism includes a driven pulley, a driving pulley, a motor and a belt; one end of the transmission shaft passes through the bearing seat and the driven pulley is installed, the motor is installed on the outside of the outer box, the driving pulley is installed on the output end of the motor, and the belt connects the driving pulley and the driven pulley.

[0010] Furthermore, the driving mechanism also includes a protective cover, which covers the belt.

[0011] Furthermore, the driving mechanism also includes a motor mounting seat, a mounting track is fixedly provided on the top of the outer box body, and the motor mounting seat is detachably connected to the mounting track.

[0012] Beneficial effects:

[0013] The double-sided bearing external cabinet centrifugal fan disclosed in the present application has a maintenance hole with an inner diameter larger than the outer diameter of the centrifugal impeller opened on the outer box body and the impeller shell. When the centrifugal impeller needs to be repaired, the centrifugal impeller and the drive shaft can be pulled out through the maintenance hole without disassembling the outer box body and the impeller shell, thereby simplifying the removal process of the centrifugal impeller, facilitating the repair and maintenance of the centrifugal impeller and improving the efficiency of repair and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a structural schematic diagram of a double-sided bearing external cabinet-type centrifugal fan disclosed in the utility model;

[0016] Figure 2 The utility model discloses an exploded view of a double-sided bearing external cabinet-type centrifugal fan.

[0017] 1. Outer box; 11. First maintenance hole; 12. Bearing fixing plate; 13. Mounting track; 2. Impeller shell; 21. Second maintenance hole; 22. Air inlet ring; 3. Centrifugal impeller; 4. Bearing seat; 5. Transmission shaft; 6. Inner frame; 71. Driven pulley; 72. Driving pulley; 73. Motor; 74. Protective cover; 75. Motor mounting seat. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Double-sided bearing external cabinet centrifugal fan, combined Figure 1 and Figure 2 As shown, it includes: an outer box body 1, an impeller shell 2, a centrifugal impeller 3, a bearing seat 4, a transmission shaft 5 and a driving mechanism; first maintenance holes 11 with an inner diameter larger than the outer diameter of the centrifugal impeller 3 are opened on both sides of the outer box body 1, and second maintenance holes 21 with an inner diameter larger than the outer diameter of the centrifugal impeller 3 are opened on both sides of the impeller shell 2; bearing fixing plates 12 are detachably connected to both sides of the outer box body 1, and the bearing fixing plates 12 block the first maintenance holes 11; the bearing seat 4 is detachably installed on the side of the bearing fixing plate 12 away from the outer box body 1, the second maintenance hole 21, the first maintenance hole 11, the bearing seat 4 and the transmission shaft 5 are coaxially arranged, and both ends of the transmission shaft 5 pass through the bearing fixing plate 12 and are connected to the bearing seat 4.

[0020] When the centrifugal impeller 3 needs to be repaired, the transmission shaft 5 is separated from the driving mechanism, the bearing seats 4 and the bearing fixing plates 12 on both sides are removed in turn, and the transmission shaft 5 together with the centrifugal impeller 3 are pulled out from the second repair hole 2 and the first repair hole 11 in turn, without disassembling the outer box 1 and the impeller shell 2, which reduces the disassembly and assembly steps of the centrifugal impeller 3, shortens the disassembly and assembly time of the centrifugal impeller 3, and makes the maintenance of the centrifugal impeller 3 more convenient and efficient. In addition, the bearing seats 4 are placed on both sides of the outer box 1, and the bearings in the bearing seats 4 are not exposed to oil, dust, moisture, heat and corrosive media, etc., which can extend the service life of the bearings.

[0021] Specifically, the outer box body 1 is provided with a plurality of first threaded holes, which are evenly distributed in a ring shape. The bearing fixing plate 12 is provided with corresponding first through holes, and the bearing fixing plate 12 is detachably fixed to the outer box body 1 by first screws.

[0022] Specifically, a clearance hole is opened in the center of the bearing fixing plate 12 for the transmission shaft 5 to pass through, and a plurality of second threaded holes are evenly distributed in a rectangle around the clearance hole of the bearing fixing plate 12. A corresponding second through hole is opened on the bearing seat 4, and the bearing seat 4 is detachably fixed to the bearing fixing plate 12 by a second screw.

[0023] Preferably, the cabinet centrifugal fan further comprises an inner frame 6, the inner frame 6 is mounted in the outer box body 1, the impeller shell 2 is mounted in the outer box body 1, and the centrifugal impeller 3 is mounted on the transmission shaft 5 and in the impeller shell 2. The inner frame 6 supports and fixes the impeller shell 2 to reduce the vibration generated by the high-speed rotation of the centrifugal impeller 3.

[0024] Preferably, both sides of the impeller shell 2 are detachably connected with an air inlet ring 22, the air inlet ring 22 is coaxially arranged with the second maintenance hole 21, one end of the air inlet ring 22 is detachably connected to the outer side of the impeller shell 2, and the other end is inserted into the second maintenance hole 21 and corresponds to the end surface of the centrifugal impeller 3. The air inlet ring 22 can connect the second maintenance hole 21 and the centrifugal impeller 3, guide the air to flow through the centrifugal impeller 3, and adjust the air intake flow, improve the air intake quality, and improve the fan efficiency.

[0025] Preferably, the driving mechanism includes a driven pulley 71, a driving pulley 72, a motor 73 and a belt; one end of the transmission shaft 5 passes through the bearing seat 4 and is then installed with the driven pulley 71, the motor 73 is installed on the outside of the outer box 1, the output end of the motor 73 is installed with the driving pulley 72, and the belt connects the driving pulley 72 and the driven pulley 71. The motor 73 drives the transmission shaft 5 to rotate through the belt transmission, thereby driving the centrifugal impeller 3 to rotate.

[0026] Preferably, the driving mechanism further comprises a protective cover 74, which covers the belt to provide protection.

[0027] Preferably, the driving mechanism also includes a motor mounting seat 75, and a mounting track 13 is fixedly provided on the top of the outer box body 1. The mounting track 13 includes two parallel C-shaped steels, and the C-shaped steels are arranged along the axis of the transmission shaft 5; the bottom of the C-shaped steel is welded to the outer box body 1, and a third through hole is provided on the top of the C-shaped steel. The motor mounting seat 75 is detachably connected to the mounting track 13, and the motor mounting seat 75 includes two parallel short C-shaped steels, and the short C-shaped steels are arranged perpendicular to the C-shaped steels. A fourth through hole is provided at the bottom of the short C-shaped steels, and the short C-shaped steels are connected to the C-shaped steels by bolts and nuts. A plurality of reinforcing rib plates are welded between the two short C-shaped steels, and a plurality of mounting plates are welded on the tops of the two short C-shaped steels. A fifth through hole is provided on the mounting plate, and the fifth through hole cooperates with bolts and nuts to be connected to the housing of the motor 73.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. Double-sided bearing external cabinet centrifugal fan, including: An outer box (1), an impeller shell (2), a centrifugal impeller (3), a bearing seat (4), a transmission shaft (5) and a driving mechanism; characterized in that first maintenance holes (11) with an inner diameter larger than the outer diameter of the centrifugal impeller (3) are opened on both sides of the outer box (1), and second maintenance holes (21) with an inner diameter larger than the outer diameter of the centrifugal impeller (3) are opened on both sides of the impeller shell (2); bearing fixing plates (12) are detachably connected to both sides of the outer box (1), and the bearing fixing plates (12) block the first maintenance holes (11); the bearing seat (4) is detachably mounted on a side of the bearing fixing plate (12) away from the outer box (1), the second maintenance hole (21), the first maintenance hole (11), the bearing seat (4) and the transmission shaft (5) are coaxially arranged, and both ends of the transmission shaft (5) pass through the bearing fixing plates (12) and are connected to the bearing seat (4).

2. The double-sided bearing external cabinet centrifugal fan according to claim 1 is characterized in that: The cabinet-type centrifugal fan further comprises an inner frame (6), wherein the inner frame (6) is installed in the outer box body (1), the impeller shell (2) is installed in the outer box body (1), and the centrifugal impeller (3) is installed on the transmission shaft (5) and in the impeller shell (2).

3. The double-sided bearing external cabinet centrifugal fan according to claim 1 is characterized in that: Air inlet rings (22) are detachably connected to both sides of the impeller shell (2); the air inlet ring (22) is coaxially arranged with the second maintenance hole (21); one end of the air inlet ring (22) is detachably connected to the outer side of the impeller shell (2), and the other end is inserted into the second maintenance hole (21) and corresponds to the end surface of the centrifugal impeller (3).

4. The double-sided bearing external cabinet centrifugal fan according to claim 1 is characterized in that: The driving mechanism comprises a driven pulley (71), a driving pulley (72), a motor (73) and a belt; one end of the transmission shaft (5) passes through the bearing seat (4) and then the driven pulley (71) is installed; the motor (73) is installed on the outside of the outer box (1); the output end of the motor (73) is installed with the driving pulley (72); and the belt connects the driving pulley (72) and the driven pulley (71).

5. The double-sided bearing external cabinet centrifugal fan according to claim 4 is characterized in that: The driving mechanism further comprises a protective cover (74), wherein the protective cover (74) covers the belt.

6. The double-sided bearing external cabinet centrifugal fan according to claim 4 is characterized in that: The driving mechanism further comprises a motor mounting seat (75); a mounting track (13) is fixedly provided on the top of the outer box body (1); and the motor mounting seat (75) is detachably connected to the mounting track (13).

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