Sealing structure for bearing seat of belt conveyor

Abstract

The utility model discloses a belt conveyor bearing seat sealing structure. The problems that an existing oil seal is difficult to replace, and the interior of a bearing seat is likely to be polluted during replacement are solved. The sealing end cover is used for sealing a bearing seat, an oil seal groove is formed in the outer end face of the sealing end cover, and the oil seal assembly is correspondingly arranged outside a rotating shaft of the belt conveyor in a penetrating mode and fixed to the oil seal groove. The oil seal assembly comprises an oil seal inner cover, an oil seal outer cover and an oil seal clamped between the oil seal inner cover and the oil seal outer cover. The oil seal inner cover comprises an oil seal cavity and a margin plate, wherein the oil seal cavity is used for being embedded into the oil seal groove, the section of the cavity wall of the oil seal cavity is correspondingly in an L shape, and the margin plate is used for being fixedly attached to the outer end face of the sealing end cover. The oil seal comprises two semicircular oil seal split bodies, and the oil seal split bodies are correspondingly spliced and embedded in the oil seal cavity; the oil seal outer cover is correspondingly attached and fixed to the edge plate of the oil seal inner cover and used for sealing the oil seal cavity. The sealing structure has the advantages that the oil seal is convenient, quick and efficient to replace.

Description

Technical Field

[0001] The present application relates to the technical field of bearing seats, and in particular to a belt conveyor bearing seat sealing structure. Background Art

[0002] The mechanical friction part of the belt conveyor bearing is due to the entry of oil during mechanical operation. In order to prevent the oil from leaking from the gap of the machine, in addition to the oil, it is also necessary to prevent the leakage of water and chemical liquids as well as the intrusion of dust and sand from the outside. Oil seals are generally used to seal the belt conveyor bearings to ensure the normal operation of the bearings.

[0003] Among them, the oil seal is simply the seal of lubricating oil. It is a mechanical component used to seal grease, isolating the parts that need lubrication in the transmission components from the output parts to prevent lubricating oil leakage. The oil seal is generally composed of a sealing body, a reinforcing frame, and a self-tightening coil spring. The sealing body can be divided into the bottom, waist, cutting edge, and sealing lip according to different parts; the reinforcing frame plays a reinforcing role and enables the sealing body to maintain its shape and tension; the sealing body lip is a flexible elastic body, which can maintain a stable sealing effect under the influence of mechanical vibration and pressure changes of the sealing fluid, thereby ensuring a stable contact seal between the sealing body and the shaft surface; and the self-tightening coil spring generates a certain contraction force after the oil seal is inserted into the shaft, which generates a certain radial tightening force on the shaft, thereby compensating for the self-tightening force of the oil seal and increasing the pressing force of the sealing lip to the shaft.

[0004] Oil seals will age and wear out as they are used, which will lead to leakage of lubricating oil. Therefore, oil seals need to be replaced in time. The existing oil seals are single-piece oil seals, which are single-piece ring-shaped as a whole, and refer to Figure 1 The single oil seal 11 is installed in the end cover 12 of the bearing seat 1. When replacing the oil seal, it is necessary to first disconnect and remove the coupling 2 connected to the bearing transmission, and then remove the bearing seat end cover, which makes the replacement process cumbersome. After the bearing seat end cover is removed, the bearing is exposed, which will cause part of the internal grease to flow out, and it may also cause impurities to enter the bearing.

[0005] The information disclosed in this background technology section is only used to deepen the understanding of the background technology of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0006] In view of at least one of the above technical problems, the present disclosure provides a belt conveyor bearing seat sealing structure, which aims to solve the problem that the existing oil seal is difficult to replace and there is a possibility of internal contamination of the bearing seat during replacement.

[0007] According to one aspect of the present disclosure, there is provided a sealing structure for a belt conveyor bearing housing, which includes a sealing end cover for sealing the bearing housing and having an oil seal groove on its outer end face, and an oil seal assembly correspondingly sleeved outside the belt conveyor rotating shaft and fixed at the oil seal groove; the oil seal assembly includes an inner oil seal cover, an outer oil seal cover, and an oil seal clamped between the inner oil seal cover and the outer oil seal cover; the inner oil seal cover includes an oil seal cavity for fitting into the oil seal groove and having an L-shaped cross-section of the cavity wall, and a flange for fitting and fixing with the outer end face of the sealing end cover; the oil seal includes two semi-circular oil seal parts, and the oil seal parts are correspondingly assembled and embedded in the oil seal cavity; the outer oil seal cover is correspondingly fixed to the flange of the inner oil seal cover to close the oil seal cavity.

[0008] In some embodiments of the present disclosure, the inner oil seal cover and the outer oil seal cover are respectively provided with a plurality of fixing through holes along the circumference, and the sealing end cover is provided with fixing holes corresponding to each of the fixing through holes; the inner oil seal cover and the outer oil seal cover are threadedly connected to the fixing holes through fixing bolts passing through the fixing through holes.

[0009] In some embodiments of the present disclosure, a rubber gasket is provided between the fixing bolt and the outer oil seal cover.

[0010] In some embodiments of the present disclosure, the thickness of the oil seal is not less than the cavity height of the oil seal cavity.

[0011] In some embodiments of the present disclosure, the inner edge of the outer oil seal cover for fitting the flange is provided with an annular convex ring for pressing the oil seal corresponding to the position of the oil seal cavity.

[0012] One or more technical solutions provided in the embodiments of the present application have at least any one of the following technical effects or advantages:

[0013] 1. Since the oil seal assembly is fixed to the outer edge of the sealing end cover, the oil seal can be replaced without disassembling the sealing end cover of the bearing housing, thereby avoiding direct exposure of the bearing to environmental pollution and leakage of the lubricating grease inside the bearing.

[0014] 2. The oil seal assembly realizes the clamping and positioning of the oil seal through the outer oil seal cover and the inner oil seal cover. After the oil seal assembly is disconnected from the sealing end cover, the oil seal can be conveniently disassembled and replaced. Moreover, since the oil seal adopts a split oil seal, the disassembly of the coupling is avoided during the oil seal replacement, thereby effectively improving the replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the existing bearing housing oil seal sealing structure in the background art of the present application.

[0016] Figure 2 It is a partial exploded structure schematic diagram of the bearing housing sealing structure in an embodiment of the present application.

[0017] Figure 3 This is a schematic diagram of the usage state of the bearing housing sealing structure in an embodiment of the present application.

[0018] In the above figures, 1 is the bearing housing, 11 is the single-piece oil seal, 12 is the end cover, 2 is the coupling, 3 is the sealing end cover, 31 is the oil seal groove, 4 is the inner oil seal cover, 41 is the oil seal cavity, 42 is the flange, 5 is the oil seal, 6 is the outer oil seal cover, 71 is the fixing through hole, 72 is the fixing hole, and 8 is the fixing bolt. Detailed implementation manners

[0019] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application.

[0020] In order to better understand the technical solution of the present application, the above technical solution will be described in detail below in conjunction with the drawings in the specification and specific implementation manners.

[0021] To solve the technical problem of the cumbersome, difficult and inefficient replacement of the oil seal in the existing bearing housing sealing structure, this example discloses a belt conveyor bearing housing sealing structure. Refer to Figure 2 , which includes a sealing end cover 3 enclosed at both end faces of the bearing housing. The sealing end cover 3 is circumferentially provided with a plurality of through holes at its edge to be connected and fixed to the bearing housing through bolts passing through the through holes. After a rotating shaft with a bearing is correspondingly placed in the bearing housing, both ends of the bearing housing are closed to prevent the bearing from being polluted by the surrounding external environment and affecting the normal rotation of the bearing.

[0022] Since the bearings in the bearing housing need to be lubricated with lubricating grease, and the grease has a certain fluidity, it can leak through the gap between the rotating shaft and the sealing end cover. After a long time, the bearings will lack lubrication and wear, affecting the smooth rotation of the bearings. Therefore, an oil seal needs to be set at the sealing end cover to achieve the sealing of the gap between the sealing end cover and the rotating shaft through the flexible material of the oil seal. However, after the oil seal is used for a long time, due to continuous contact with the rotating shaft, the oil seal will wear and age, resulting in the sealing failure between the oil seal and the rotating shaft and the occurrence of grease leakage. Therefore, the oil seal needs to be replaced. When replacing the existing oil seal, it is necessary to disassemble the coupling at the rotating shaft and the end cover of the bearing housing in sequence, and then pry out the oil seal for replacement. The process is relatively cumbersome, and the bearing is exposed after the sealing end cover is opened. If the surrounding environment is relatively harsh, impurities will enter the bearing and cause pollution, accelerating the wear of the bearing and reducing its service life. Therefore, referring to Figure 2 , an oil seal groove 31 is formed on the outer end face of the sealing end cover 3, and an oil seal assembly is fixedly arranged in the oil seal groove 31. Thus, when replacing the oil seal, only the oil seal assembly needs to be removed, without the need to disassemble the sealing end cover 3. And in this embodiment, the sealing end cover 3 has a certain thickness, and the thickness of the sealing end cover 3 is greater than the depth of the oil seal groove 31. This makes the inner end face of the sealing end cover close to the bearing still in contact with the rotating shaft. After the oil seal assembly is removed from the oil seal groove 31, the bearing will not be directly exposed, avoiding the problem of impurity pollution at the bearing; in addition, since the inner end face of the sealing end cover is still in contact with the rotating shaft, it can avoid the problem of the lubricating grease in the bearing housing flowing out wantonly after the sealing end cover is disassembled.

[0023] Specifically, referring to Figure 2 , the oil seal assembly includes an oil seal inner cover 4, an oil seal outer cover 6, and an oil seal 5 clamped between the oil seal inner cover 4 and the oil seal outer cover 6. The oil seal assembly is correspondingly filled at the oil seal groove 31 of the sealing end cover 3 and passes through the outside of the belt conveyor rotating shaft. Thus, the oil seal between the rotating shaft and the sealing end cover 3 is realized through the oil seal assembly, avoiding the leakage of lubricating grease through the gap between the sealing end cover 3 and the rotating shaft.

[0024] Among them, the oil seal inner cover 4 is used to be embedded in the oil seal groove 31, and it includes an oil seal cavity 41 and an edge plate 42. In this embodiment, the oil seal cavity 41 and the edge plate 42 are an integrated structure. In order to enable the oil seal inner cover 4 to be embedded in the oil seal groove 31, the outer edge contour of the cavity wall of the oil seal cavity 41 is consistent with the inner edge contour of the oil seal groove 31, so that the outer edge of the cavity wall of the oil seal cavity 41 can be closely fitted and contacted with the groove wall of the oil seal groove 31, thereby avoiding the existence of a gap between the two. In addition, in this embodiment, the cross-sectional profile of the oil seal cavity 41 is L-shaped, thereby forming an annular chamber, so that the oil seal filled in the annular chamber is easy to fill. At the same time, the oil seal filled in the oil seal cavity 41 is in contact with the corresponding end face cavity wall, so that when the oil seal inner cover 4 is removed from the oil seal groove 31, the oil seal filled in the oil seal cavity 41 can be removed along with it, thereby avoiding the complexity of the existing tool prying and damage to the structure. In addition, in the present embodiment, the edge plate 42 which is integrated with the oil seal inner cover 4 and the oil seal cavity 41 is used to fix the oil seal inner cover 4. After the edge plate 42 is tightly fitted and fixed to the outer end surface of the sealing end cover 3, the cavity wall of the oil seal cavity 41 is tightly fitted to the oil seal groove 31, thereby realizing the installation of the oil seal inner cover 4 in the oil seal groove 31.

[0025] The oil seal 5 is filled in the oil seal cavity 41 of the oil seal inner cover 4, and its outer edge diameter matches the inner edge diameter of the oil seal cavity 41, so that the oil seal 5 can be tightly embedded in the oil seal cavity 41. Figure 2 In this embodiment, two oil seals 5 are provided, and the two oil seals are symmetrically arranged. Through the contact between the oil seal and the belt conveyor shaft, the gap between the sealing end cover 3 and the shaft is blocked to prevent the leakage of lubricating grease. However, considering that the oil seal sleeve is arranged outside the shaft of the belt conveyor, in order to avoid disassembling the coupling when replacing the oil seal, in this embodiment, the oil seal 5 includes two semicircular oil seal parts, and the two semicircular oil seal parts form a complete oil seal. Therefore, when replacing the oil seal, after removing the oil seal from the oil seal cavity 41, it can be directly separated from the shaft without disassembling the coupling to take out the annular oil seal.

[0026] The oil seal outer cover 6 is used to seal the oil seal cavity 41 of the oil seal inner cover 4 to prevent the oil seal from falling off or being contaminated by the external environment. Figure 2, the outer oil seal cover 6 is closely and fixedly attached to the flange 42 of the inner oil seal cover 4, and its inner edge contour is consistent with the outer edge contour of the belt conveyor rotating shaft, so that it is closely sleeved outside the rotating shaft to achieve the purpose of closing the oil seal cavity 41. In order to fix the outer oil seal cover 6 and fix the inner oil seal cover 4 at the oil seal groove 31 of the sealing end cover, in this embodiment, a number of corresponding fixing through holes 71 are respectively arranged in a circumferential equidistant circular array on the inner oil seal cover 4 and the outer oil seal cover 6. Correspondingly, fixing holes 72 corresponding to each fixing through hole 71 are arranged in a circular array on the sealing end cover 3. The fixing hole 72 is a bolt hole. Thus, by sequentially threading the fixing bolts passing through the fixing through holes 71 of the outer oil seal cover 6 and the inner oil seal cover 4 and threadedly connecting them with the corresponding fixing holes 72, the fixing of the inner oil seal cover 4 and the outer oil seal cover 6 can be realized simultaneously, and the outer oil seal cover 6 can close the oil seal cavity 41 and clamp the oil seal 5. In addition, in this embodiment, in order to ensure the fastening effect of the fixing bolts, a rubber gasket is provided between the bolt head of the fixing bolt and the outer oil seal cover 6. In this example, the rubber gasket is an annular gasket and is sleeved on the fixing bolt. Through the elasticity of the rubber gasket, a certain degree of buffering can be realized, the vibration during machine operation can be absorbed, and the possibility of the fixing bolts loosening can be reduced.

[0027] In order to ensure the sealing effect of the oil seal, in this embodiment, the thickness of the oil seal embedded in the oil seal cavity 41 is set to be not less than the cavity height of the oil seal cavity. Since the oil seal material has certain deformation characteristics, when the outer oil seal cover 6 presses the oil seal 5, the oil seal 5 will produce a certain deformation so as to fill the oil seal cavity 41 and ensure effective contact between the oil seal and the rotating shaft. In some other embodiments, in order to further ensure the pressing force of the outer oil seal cover 6 on the oil seal, an annular convex ring for pressing the oil seal is provided at the inner edge of the outer oil seal cover 6 for closing the oil seal cavity 41. The width of the annular convex ring is less than the corresponding width of the oil seal cavity, so that the annular convex ring can be pressed within the range of the oil seal cavity to press the oil seal.

[0028] For the actual assembly of the belt conveyor bearing seat sealing structure, refer to Figure 3 , after the bearing seat 1 is closed by the sealing end cover 3, an oil seal assembly is fitted and fixed in the oil seal groove of the sealing end cover 3, and the inner oil seal cover and the outer oil seal cover are fixed to the sealing end cover by the fixing bolts 8; when the oil seal needs to be replaced, disassemble each fixing bolt 8, and after removing the oil seal assembly, the inner oil seal cover 4 and the outer oil seal cover 6 are disengaged due to the loss of the fastening of the fixing bolts. After removing the oil seal from the oil seal cavity of the inner oil seal cover 4, replace it with a new oil seal, then fit the inner oil seal cover 4 into the oil seal groove of the sealing end cover correspondingly, and then press the outer oil seal cover to press the oil seal and tighten each fixing bolt. This can avoid disassembling the coupling and also avoid disassembling the sealing end cover of the bearing seat.

[0029] Although some preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present application.

[0030] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of its inventive concept. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A belt conveyor bearing seat sealing structure, characterized in that: It includes a sealing end cover for sealing the bearing seat and having an oil seal groove on the outer end surface, and an oil seal assembly correspondingly passed through the outside of the belt conveyor shaft and fixed at the oil seal groove; The oil seal assembly includes an oil seal inner cover, an oil seal outer cover, and an oil seal sandwiched between the oil seal inner cover and the oil seal outer cover; the oil seal inner cover includes an oil seal cavity for being embedded in the oil seal groove and having a cavity wall cross-section corresponding to an L-shape, and an edge plate for being fitted and fixed to the outer end surface of the sealing end cover; the oil seal includes two semicircular oil seal parts and the oil seal parts are correspondingly spliced ​​and embedded in the oil seal cavity; the oil seal outer cover is correspondingly fitted and fixed to the edge plate of the oil seal inner cover for closing the oil seal cavity.

2. The belt conveyor bearing seat sealing structure according to claim 1, characterized in that: The oil seal inner cover and the oil seal outer cover are provided with a plurality of fixing through holes corresponding to each other along the circumference, and the sealing end cover is provided with fixing holes corresponding to each of the fixing through holes; the oil seal inner cover and the oil seal outer cover are threadedly connected with the fixing holes by fixing bolts passing through the fixing through holes.

3. The belt conveyor bearing seat sealing structure according to claim 2, characterized in that: A rubber gasket is arranged between the fixing bolt and the oil seal outer cover.

4. The belt conveyor bearing seat sealing structure according to claim 1, characterized in that: The thickness of the oil seal is not less than the cavity height of the oil seal cavity.

5. The belt conveyor bearing seat sealing structure according to claim 4, characterized in that: The oil seal outer cover is used to fit the inner edge of the edge plate and is provided with an annular convex ring for pressing the oil seal at a position corresponding to the oil seal cavity.

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