Centrifugal fan bearing box end cover and assembling device

Abstract

The application discloses a centrifugal fan bearing box end cover and an assembling device, and belongs to the technical field of centrifugal fan bearing box end cover sealing. The centrifugal fan bearing box end cover comprises a bearing end cover body, and a sealing groove is recessed in the inner wall of the bearing sleeve of the bearing end cover body; and a ring-shaped felt is clamped in the sealing groove. According to the application, the ring-shaped felt and the oil baffle form a combined sealing structure, and the felt can also well undertake the sealing task in the case that the oil baffle fails, so that the sealing effect is optimized.

Description

Technical Field

[0001] This application belongs to the field of centrifugal fan bearing housing end cover sealing technology, specifically relating to a centrifugal fan bearing housing end cover and assembly device. Background Technology

[0002] During the operation of a centrifugal fan, the conveyed medium contains powdery materials, which will adhere to the impeller. If there is too much material, some of it will fall off during operation, causing the impeller to lose dynamic balance. This causes the bearing housing to vibrate, and the bearing oil retainer ring will change its original position due to the vibration, thus losing its oil-retaining function. Lubricating oil will flow out from the shaft seal, and the lack of oil in the fan bearing will cause damage, thus affecting the service life of the fan.

[0003] In existing centrifugal fan structures, the bearing housing shaft seal is generally sealed with an oil retainer ring. The oil retainer ring is installed on the shaft and rotates with the shaft. The centrifugal force generated by the rotation throws excess oil or grease back in the oil return direction. If the oil retainer ring moves or becomes misaligned during operation, it will not be able to retain all the oil in the bearing housing. Some lubricating oil will flow out from the shaft seal. Over time, this will cause a lack of lubricating oil, resulting in poor bearing lubrication and damage, and causing the fan to stop. Utility Model Content

[0004] The technical problem to be solved by this application is to overcome the shortcomings of the prior art and provide a centrifugal fan bearing housing end cover and assembly device. This application forms a combined seal by adding annularly arranged felt and oil baffle ring. Even if the oil baffle ring fails, the felt can still perform the sealing task well and optimize the sealing effect.

[0005] The technical solution adopted by this application to solve its existing problems is: A centrifugal fan bearing housing end cover includes a bearing end cover body, and a sealing groove is recessed in the inner wall of the bearing sleeve of the bearing end cover body. An annular felt is inserted into the sealing groove.

[0006] Preferably, the height of the felt is greater than the depth of the sealing groove.

[0007] Preferably, the width of the felt is greater than the width of the sealing groove.

[0008] Preferably, the height of the felt protruding outside the sealing groove is 1-3 mm.

[0009] An assembly device for assembling the above-mentioned centrifugal fan bearing housing end cover includes two oppositely arranged insert plates, the distance between the outer sides of the two insert plates being less than or equal to the width of the sealing groove; The tops of the two insert plates are fixedly connected by a connecting plate. One end of the insert plate is connected to a pressing plate. The angle between the outer side of the pressing plate and the outer side of the insert plate is 120°-150°. The bottom surface of the insert plate is lower than the bottom surface of the extrusion plate, and the height difference between the two bottom surfaces is greater than or equal to the depth of the sealing groove.

[0010] Preferably, the end of the extrusion plate opposite to the insert plate is connected to a snap-fit ​​plate, the snap-fit ​​plate is arranged parallel to the insert plate, and the distance between the inner walls of the two snap-fit ​​plates is greater than or equal to the width of the felt.

[0011] Preferably, a pressure plate is slidably provided between the two insert plates, and a vertically arranged pressure rod is fixed above the pressure plate, the pressure rod being slidably connected to the connecting plate.

[0012] Preferably, the connecting plate is provided with a through hole, and the top end of the pressure rod passes through the through hole and is fixed with a pressure handle.

[0013] Preferably, the bottom of the insert plate is provided with a slanted guide plate.

[0014] Compared with the prior art, the beneficial effects of this application are as follows: (1) The oil-impregnated felt is used to friction seal the shaft, which will not damage the shaft. The amount of felt used is very small and the price is relatively cheap. The lubricating oil does not fall to the ground, which can protect the hygiene of the site environment and effectively prevent the bearing box of the fan from being damaged due to lack of oil, thus extending the service life of the fan.

[0015] (2) Existing bearing end cover bodies can be modified. The sealing grooves are neatly machined and of the same size, without affecting the overall firmness of the end cover. Installation is convenient and quick. After the end cover is machined, it can be installed when replacing the fan bearing, which is convenient for upgrading and modifying existing products. Attached Figure Description

[0016] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a top view of an end cover for a centrifugal fan bearing housing according to this application. Figure 2 This is a sectional view of an end cover for a centrifugal fan bearing housing according to this application. Figure 3 This application discloses a felt structure diagram in the end cover of a centrifugal fan bearing housing. Figure 4 This is a structural diagram of the assembly device for this application. Figure 5 This is an assembly diagram of the assembly device of this application after it is connected to the felt. Figure 6 for Figure 5 The bottom view.

[0018] In the diagram: 1-Bearing end cover body, 101-Bearing sleeve, 102-Flange, 103-Bolt hole, 104-Sealing groove, 2-Felt, 201-Interface, 3-Assembly device, 301-Insert plate, 302-Angled guide base plate, 303-Extrusion plate, 304-Snap-fit ​​plate, 305-Handle, 306-Connecting plate, 307-Pressure plate, 308-Pressure rod, 309-Pressure handle. Detailed Implementation

[0019] The attached figure shows the preferred embodiment of the centrifugal fan bearing housing end cover and assembly device. The following is a more detailed description of this application in conjunction with the attached figure.

[0020] Depend on Figure 1 as well as Figure 2 As shown, a centrifugal fan bearing housing end cover includes a bearing end cover body 1. The bearing end cover body 1 includes a bearing sleeve 101. The bearing sleeve 101 has an annular flange 102 at its end, and the flange 102 has a plurality of bolt holes 103.

[0021] The inner wall of the bearing sleeve 101 is recessed with a sealing groove 104, and an annular felt 2 is inserted inside the sealing groove 104.

[0022] The height of the felt 2 is greater than the depth of the sealing groove 104, which ensures that the height of the felt 2 leaking outside the sealing groove 104 is 1-3mm.

[0023] The width of the felt 2 is greater than the width of the sealing groove 104, so the felt 2 needs to be squeezed to be put into the sealing groove 104. After being put in, the restoring force of the felt 2 can squeeze the sealing groove 104, increasing the connection strength between the two.

[0024] Specifically, the sealing groove 104 is a groove with a depth of 6mm and a width of 9mm, and the felt 2, in its free state, has a height of 8mm and a width of 10mm. Figure 3 As shown, the interface 201 of the felt 2 is cut at an angle, and the interface 201 is placed on the side of the bearing end cover body 1 facing upwards to ensure that the joint of the felt 2 is tightly connected and will not leak oil. The part of the felt 2 that protrudes from the sealing groove 104 is slightly tight to the shaft. Lubricating oil is immersed in the felt to ensure flexible rotation. It cooperates with the original oil baffle ring of the fan to achieve a double sealing effect.

[0025] Therefore, it is convenient to modify and upgrade the end covers on both sides of the centrifugal fan without damaging the original fan structure.

[0026] Depend on Figures 4 to 6 As shown, an assembly device is used to assemble the above-mentioned centrifugal fan bearing housing end cover, mainly for squeezing the felt 2 and installing the felt 2 into the sealing groove 104.

[0027] The assembly device 3 includes two insert plates 301 arranged opposite each other. The distance between the outer sides of the two insert plates 301 is less than or equal to the width of the sealing groove 104, so as to facilitate insertion into the sealing groove 104.

[0028] The tops of the two insert plates 301 are fixedly connected by a connecting plate 306. One end of each insert plate 301 is connected to a pressing plate 303, and the angle between the outer surface of the pressing plate 303 and the outer surface of the insert plate 301 is 120°-150°. The bottom surface of the insert plate 301 is lower than the bottom surface of the pressing plate 303, and the height difference between the two bottom surfaces is greater than or equal to the depth of the sealing groove 104. In this way, when the bottom of the insert plate 301 is inserted into the sealing groove 104, the pressing plate 303 can remain outside the sealing groove 104 without causing interference.

[0029] To facilitate better insertion of the insert plate 301 into the sealing groove 104, the bottom of the insert plate 301 is provided with a slanted guide plate 302. The slanted guide plates 302 of the two insert plates 301 are arranged in an inverted V-shape to facilitate guiding insertion.

[0030] The end of the extrusion plate 303 facing away from the insertion plate 301 is connected to a snap-fit ​​plate 304. The snap-fit ​​plate 304 is arranged parallel to the insertion plate 301, and the distance between the inner walls of the two snap-fit ​​plates 304 is greater than or equal to the width of the felt 2.

[0031] A handle 305 is provided on the outer side of the end of the snap-fit ​​plate 304 away from the compression plate 303 for easy holding. In use, one end of the felt 2 is passed through the snap-fit ​​plate 304 and the compression plate 303 in sequence and inserted into the insert plate 301. During the insertion process, it is orderly compressed by the inclined compression plate 303.

[0032] After installing the felt 2, insert the insert plate 301 into the sealing groove 104, thereby driving the end of the felt 2 into the sealing groove 104. Then, hold the end of the felt 2 and pull the assembly device 3 along the sealing groove 104 to compress the felt 2 in sequence, so that it is completely inserted into the sealing groove 104.

[0033] To ensure that the bottom of the felt 2 abuts against the bottom of the sealing groove 104, a pressure plate 307 is slidably provided between the two insert plates 301. A vertically arranged pressure rod 308 is fixed above the pressure plate 307, and the pressure rod 308 is slidably connected to the connecting plate 306. The connecting plate 306 is provided with a through hole, and the top end of the pressure rod 308 passes through the through hole and is fixed with a pressure handle 309, which can press the felt 2 tightly by pressing down the handle 309.

[0034] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A centrifugal fan bearing housing end cover, comprising a bearing end cover body (1), characterized in that: The bearing sleeve (101) of the bearing end cover body (1) is recessed with a sealing groove (104), and an annular felt (2) is inserted inside the sealing groove (104).

2. The centrifugal fan bearing housing end cover according to claim 1, characterized in that: The height of the felt (2) is greater than the depth of the sealing groove (104).

3. The centrifugal fan bearing housing end cover according to claim 2, characterized in that: The width of the felt (2) is greater than the width of the sealing groove (104).

4. A centrifugal fan bearing housing end cover according to claim 2 or 3, characterized in that: The height of the felt (2) leaking to the outside of the sealing groove (104) is 1-3mm.

5. An assembly device for assembling the centrifugal fan bearing housing end cover as described in claim 4, characterized in that: It includes two insert plates (301) arranged opposite each other, and the distance between the outer sides of the two insert plates (301) is less than or equal to the width of the sealing groove (104); The tops of the two insert plates (301) are fixedly connected by a connecting plate (306). One end of the insert plate (301) is connected to a pressing plate (303). The angle between the outer side of the pressing plate (303) and the outer side of the insert plate (301) is 120°-150°. The bottom surface of the insert plate (301) is lower than the bottom surface of the extrusion plate (303), and the height difference between the bottom surfaces of the two is greater than or equal to the depth of the sealing groove (104).

6. The assembly apparatus according to claim 5, characterized in that: The end of the extrusion plate (303) facing away from the insertion plate (301) is connected to a snap-fit ​​plate (304). The snap-fit ​​plate (304) is arranged in parallel with the insertion plate (301), and the distance between the inner walls of the two snap-fit ​​plates (304) is greater than or equal to the width of the felt (2).

7. The assembly apparatus according to claim 5, characterized in that: A pressure plate (307) is provided between the two insert plates (301) and slides up and down. A vertically arranged pressure rod (308) is fixed above the pressure plate (307) and slides with the connecting plate (306).

8. The assembly apparatus according to claim 7, characterized in that: The connecting plate (306) is provided with a through hole, and the top end of the pressure rod (308) passes through the through hole and is fixed with a pressure handle (309).

9. An assembly apparatus according to any one of claims 5 to 8, characterized in that: The bottom of the insert plate (301) is provided with a slanted guide plate (302).

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