Vibrating screen bearing sealing device

Abstract

The utility model discloses a vibrating screen bearing sealing device which is used for sealing a bearing installed on a rotating shaft of a vibrating screen and comprises a gland fixedly connected with a bearing seat, the gland is sleeved on the rotating shaft on the outer side of the bearing, and a sealing rubber pipe made of oil-resistant and friction-resistant materials is sleeved on the rotating shaft on the inner side of the gland. The inner diameter of the sealing rubber pipe is larger than the outer diameter of the rotating shaft, the outer end of the sealing rubber pipe is fixedly connected with the inner side wall of the gland, and the inner end of the sealing rubber pipe is in close contact with the outer side wall of the bearing inner ring. According to the utility model, the sealing effect on the vibrating screen bearing is good, and the oil leakage phenomenon is reduced.

Description

Technical Field

[0001] The utility model relates to a sealing device, in particular to a vibration screen bearing sealing device. Background Art

[0002] Vibrating screen is a device used for screening granular materials. It drives the eccentric shaft to rotate and drive the screen box to make directional jumps, so that small particles fall down and become underscreen. Vibrating screen is widely used in screening operations in mining, building materials, roads and chemical industries. Figure 5 As shown, the two ends of the existing vibrating screen shaft are rotatably mounted on the bearing seat of the vibrating screen through bearings, the outer ring of the bearing is fixed to the bearing seat, the inner ring of the bearing is fixed to the shaft, the bearing is lubricated with lubricating oil, an oil-slinging plate is installed on the shaft outside the bearing through a bushing, the oil-slinging plate and the inner ring of the bearing rotate together with the shaft, and the oil-slinging plate throws the lubricating oil squeezed out of the bearing to the oil storage space between the gland and the bearing seat and then flows back to the bearing, a gland fixedly connected to the bearing seat is arranged on the outside of the bushing, the bushing, the oil-slinging plate and the bearing are sealed by the gland, and a skeleton oil seal is arranged between the gland and the shaft to seal the bearing and the shaft. However, since a large radial impact load is generated on the outer peripheral side of the shaft when the eccentric shaft rotates, the skeleton oil seal is strongly squeezed, so that the skeleton oil seal is damaged in a short time and squeezed out from between the gland and the shaft and loses the sealing effect, resulting in poor sealing effect on the bearing, so that the lubricating oil leaks out from between the gland and the shaft to cause oil leakage, especially when the lubricating oil is thin oil, the oil leakage phenomenon is more serious. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a vibration screen bearing sealing device which has good bearing sealing effect and can reduce oil leakage.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a vibration screen bearing sealing device, which is used to seal the bearing installed on the vibration screen rotating shaft, including a pressure cover fixedly connected to the bearing seat, the pressure cover is sleeved on the rotating shaft outside the bearing, and the rotating shaft inside the pressure cover is sleeved with a sealing hose made of oil-resistant and friction-resistant material, the inner diameter of the sealing hose is larger than the outer diameter of the rotating shaft, the outer end of the sealing hose is fixedly connected to the inner wall of the pressure cover, and the inner end of the sealing hose is in close contact with the outer wall of the inner ring of the bearing.

[0005] As a preferred technical solution, a mounting sleeve is provided on the inner wall of the pressure cover protruding toward the bearing side and is sleeved on the outer circumference of the rotating shaft. The inner diameter of the mounting sleeve is larger than the outer diameter of the rotating shaft. The outer end of the sealing hose is sleeved on the mounting sleeve, and a locking clamp is sleeved on the outer circumference of the sealing hose.

[0006] As a preferred technical solution, grooves are provided on the outer peripheral surface of the mounting sleeve, and the inner end of the sealing rubber tube is provided with annular inner sealing lip and outer sealing lip extending to the inside and outside of the tube respectively, and the outer ends of the inner sealing lip and the outer sealing lip are tightly pressed against the outer side wall of the inner ring of the bearing.

[0007] As a preferred technical solution, the sealing rubber tube is a silicone sleeve.

[0008] The vibration screen bearing sealing device adopts the above-mentioned technical solution, which is used to seal the bearing installed on the vibration screen rotating shaft, including a pressure cover fixedly connected to the bearing seat, the pressure cover is sleeved on the rotating shaft outside the bearing, and the rotating shaft inside the pressure cover is sleeved with a sealing hose made of oil-resistant and friction-resistant material, the inner diameter of the sealing hose is larger than the outer diameter of the rotating shaft, the outer end of the sealing hose is fixedly connected to the inner wall of the pressure cover, and the inner end of the sealing hose is in close contact with the outer wall of the inner ring of the bearing. The utility model forms an oil storage cavity between the outer periphery of the sealing rubber tube, the outer periphery of the bearing inner ring, the bearing outer ring, the bearing seat and the sealing rubber tube by the inner end of the sealing rubber tube mounted on the rotating shaft inside the pressure cover tightly presses against the outer side wall of the bearing inner ring, the lubricating oil squeezed out of the bearing is completely isolated in the oil storage cavity by the sealing rubber tube and separated from the rotating shaft, thereby avoiding the oil leakage caused by the lubricating oil leaking out from between the pressure cover and the rotating shaft, and because only the inner end of the sealing rubber tube is tightly pressed against the outer side wall of the bearing inner ring and is only subjected to the axial reaction force between the two, and the sealing rubber tube and the rotating shaft are separated and not in contact, the large radial impact load during the rotation of the eccentric rotating shaft will not affect the sealing rubber tube and will not cause damage to it, thus ensuring the service life of the sealing rubber tube and the sliding sealing effect between the inner end of the sealing rubber tube and the outer side wall of the bearing inner ring, and reducing the occurrence of oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0012] Figure 3 This is a schematic diagram of an embodiment of the sealing rubber hose of the utility model;

[0013] Figure 4 This is a schematic diagram of the installation of the gland and the sealing hose of the utility model;

[0014] Figure 5 It is a schematic diagram of the existing vibrating screen bearing seal.

[0015] In the figure: 1-rotating shaft; 2-bearing; 21-outer ring; 22-inner ring; 3-bushing; 4-oil-slinging pan; 5-bearing seat; 6-pressure cover; 7-skeleton oil seal; 8-sealing hose; 81-inner sealing lip; 82-outer sealing lip; 9-installing sleeve; 10-locking clamp; 11-oil storage space. DETAILED DESCRIPTION

[0016] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0017] like Figure 5 As shown, the sealing structure of the bearing 2 at both ends of the eccentric rotating shaft 1 of the existing vibrating screen bearing seal is shown. The oil-slinging plate 4 is installed on the rotating shaft 1 outside the bearing 2 through the bushing 3. The oil-slinging plate 4 and the inner ring 22 of the bearing 2 rotate together with the rotating shaft 1, and the oil-slinging plate 4 throws the lubricating oil squeezed out of the bearing 2 to the oil storage space 11 between the pressure cover 6 and the bearing seat 5, and then flows back to the bearing 2. The outer side of the bushing 3 is provided with a pressure cover 6 fixedly connected to the bearing seat 5. The bushing 3, the oil-slinging plate 4 and the bearing 2 are sealed by the pressure cover 6. A skeleton oil seal 7 is provided between the pressure cover 6 and the rotating shaft 1 to achieve sealing. However, the skeleton oil seal 7 of this structure is impacted by the large radial impact load generated by the rotation of the rotating shaft 1, so that the skeleton oil seal 7 is easily damaged in a short time and squeezed out from between the pressure cover 6 and the rotating shaft 1, thereby losing the sealing effect, resulting in poor sealing effect on the bearing 2 and oil leakage.

[0018] like Figure 1 and Figure 2 As shown, the vibration screen bearing sealing device of the utility model is used to seal the bearing 2 installed on the vibration screen rotating shaft 1, the outer ring 21 of the bearing 2 is fixedly connected to the bearing seat 5, the inner ring 22 of the bearing 2 is fixedly connected to the rotating shaft 1, and includes a gland 6 fixedly connected to the bearing seat 5, the gland 6 is sleeved on the rotating shaft 1 outside the bearing 2, and the rotating shaft 1 inside the gland 6 is sleeved with a sealing hose 8 made of oil-resistant and friction-resistant material, the inner diameter of the sealing hose 8 is larger than the outer diameter of the rotating shaft 1, the outer end of the sealing hose 8 is fixedly connected to the inner side wall of the gland 6, and the inner end of the sealing hose 8 is in close contact with the outer side wall of the inner ring 22 of the bearing 2. The inner diameter of the sealing hose 8 is larger than the outer diameter of the rotating shaft 1, so that the sealing hose 8 is sleeved on the rotating shaft 1 without contacting the rotating shaft 1, avoiding the impact of a large radial impact load generated when the rotating shaft 1 rotates, so that the sealing hose 8 is not damaged, and the sealing effect between the sealing hose 8 and the inner side wall of the gland 6 is guaranteed. The sealing hose 8 made of oil-resistant and friction-resistant material can be a silicone sleeve made of silicone material, which is oil-resistant and wear-resistant, and has good elasticity and hardness, and can effectively maintain tight contact with the outer wall of the inner ring 22 of the bearing 2; the sealing hose 8 can also be a rubber tube made of other oil-resistant and wear-resistant rubbers.

[0019] like Figure 1 , Figure 2 and Figure 4 As shown, the inner wall of the gland 6 is provided with a mounting sleeve 9 which is sleeved on the outer circumference of the shaft 1 and protrudes toward the bearing 2. The inner diameter of the mounting sleeve 9 is larger than the outer diameter of the shaft 1, so that the mounting sleeve 9 is sleeved on the shaft 1 without contacting the shaft 1. The outer end of the sealing rubber tube 8 is sleeved on the mounting sleeve 9, and a locking clamp 10 is sleeved on the outer circumference of the sealing rubber tube 8. The mounting sleeve 9 plays a certain supporting role for the sealing rubber tube 8, strengthens the close contact between the end of the sealing rubber tube 8 and the outer wall of the inner ring 22 of the bearing 2, and ensures the sealing effect; the locking clamp 10 firmly holds the sealing rubber tube 8 and installs it on the mounting sleeve 9. The mounting sleeve 9 and the gland 6 can be integrally formed, or fixed together by welding or other methods.

[0020] like Figure 3 As shown, the outer circumferential surface of the mounting sleeve 9 is provided with grooves, and the grooves can increase the friction effect between the mounting sleeve 9 and the inner circumference of the sealing hose 8, thereby enhancing the fixing effect of the sealing hose 8 on the mounting sleeve 9; the inner end of the sealing hose 8 is provided with an annular inner sealing lip 81 and an outer sealing lip 82 extending toward the inner side and the outer side of the tube respectively, and the outer ends of the inner sealing lip 81 and the outer sealing lip 82 are tightly pressed against the outer side wall of the inner ring 22 of the bearing 2. Because the inner sealing lip 81 and the outer sealing lip 82 on the sealing hose 8 are both elastic, the inner sealing lip 81 and the outer sealing lip 82 will bend when they are tightly pressed against the outer side wall of the inner ring 22 of the bearing 2 and are in close contact with the outer side wall of the inner ring 22 of the bearing 2, thereby increasing the contact area with the outer side wall of the inner ring 22 of the bearing 2, and at the same time, they can rebound after the inner sealing lip 81 and the outer sealing lip 82 are worn and shortened to maintain close contact with the outer side wall of the inner ring 22 of the bearing 2, thereby ensuring the sealing effect.

[0021] The utility model adopts a sealing rubber tube 8 protruding from the inner wall of the gland 6 and tightly contacting with the outer wall of the inner ring 22 of the bearing 2 to seal the lubricating oil at the bearing 2, isolates the lubricating oil from the rotating shaft 1, and avoids the lubricating oil from leaking out from the matching part of the gland 6 and the rotating shaft 1 along the rotating shaft 1, solves the problem of lubricating oil leakage caused by the skeleton oil seal 7 being easily squeezed out and damaged when the current vibration screen bearing 2 is sealed with the skeleton oil seal 7, and especially solves the oil leakage problem when the lubricating oil is thin oil, and has a good sealing effect. In addition, the bearing 2 sealing device of the utility model only realizes sliding sealing by matching the sealing rubber tube 8 fixedly connected to the gland 6 with the outer wall of the inner ring 22 of the bearing 2, and does not need to install the oil-throwing plate 4 through the bushing 3, eliminates the complex structure of the rotating seal between the inner side of the gland 6 and the bushing 3, and reduces the wear of the gland 6.

[0022] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship in the present invention are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] As described above, the embodiments of the present invention have been specifically described above, but the present invention is not limited thereto. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations or substitutions can be made according to design requirements or other factors, and they are within the scope of the attached claims and their equivalents.

Claims

1. A vibrating screen bearing sealing device, used for sealing a bearing mounted on a rotating shaft of a vibrating screen, comprising a gland fixedly connected to a bearing seat, the gland being sleeved on the rotating shaft outside the bearing, characterized in that: A sealing hose made of oil-resistant and friction-resistant material is mounted on the rotating shaft inside the gland. The inner diameter of the sealing hose is larger than the outer diameter of the rotating shaft. The outer end of the sealing hose is fixedly connected to the inner wall of the gland, and the inner end of the sealing hose is in close contact with the outer wall of the inner ring of the bearing.

2. The vibrating screen bearing sealing device according to claim 1, characterized in that: A mounting sleeve is provided on the inner wall of the gland and protrudes toward the bearing side. The mounting sleeve is sleeved on the outer circumference of the shaft. The inner diameter of the mounting sleeve is larger than the outer diameter of the shaft. The outer end of the sealing hose is sleeved on the mounting sleeve. A locking clamp is sleeved on the outer circumference of the sealing hose.

3. The vibrating screen bearing sealing device according to claim 2, characterized in that: The outer peripheral surface of the mounting sleeve is provided with grooves, and the inner end of the sealing rubber tube is provided with an annular inner sealing lip and an outer sealing lip extending toward the inner side and the outer side of the tube respectively, and the outer ends of the inner sealing lip and the outer sealing lip are tightly pressed against the outer side wall of the inner ring of the bearing.

4. The vibrating screen bearing sealing device according to any one of claims 1 to 3, characterized in that: The sealing rubber tube is a silicone sleeve.

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