Bearing device capable of preventing leakage and fan
By setting sealing grooves and protrusions between the bearing side cover and the rotating shaft to form a bent sealing channel, the problem of oil leakage at the bearing box seal in the rolling mill equipment is solved, and effective sealing of bearings and normal operation of production is achieved.
Patent Information
- Application Number
- CN202421044901.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-14
AI Technical Summary
The degreased hot air drying fans in existing rolling mill equipment have caused frequent bearing locking failures due to oil leakage at the bearing box seal, which affects the production rhythm and increases the risk of maintenance and inspection.
A bearing device is designed to prevent leakage. By providing a sealing groove on the inner edge of the bearing side cover and a protrusion on the outer circumference of the rotating shaft, a bent sealing channel is formed, which increases flow resistance and reduces the flow speed and kinetic energy of the sealing liquid, thereby Prevent sealing liquid from flowing out.
It effectively solves the oil leakage problem at the bearing seal, ensures the effective sealing effect of the bearing, avoids the occurrence of bearing lock failures, and improves the normal operation and maintenance safety of production.
Smart Images
Figure CN222502148U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of bearing sealing, and in particular relates to a bearing device and a fan for preventing leakage. Background Art
[0002] The degreasing machine in the rolling mill can unwind the cold-rolled steel coil, cut off the extra-thick part at the tail of the strip, adjust the weight of the steel coil, and coil it with appropriate tension. The degreasing unit has two hot air drying fans, which are responsible for drying the surface of the strip to ensure that there is no water stain on the surface of the strip and to prevent the strip from rusting. Once the hot air drying fan fails and causes the surface of the strip to rust, batch quality accidents will occur, so it is very important to ensure the good operation of the hot air drying fan.
[0003] The existing degreasing hot air drying fan used in rolling mill equipment has always faced the problem of oil leakage at the seal of the bearing box, which requires regular oil replenishment. The oil replenishment cycle is only one week. The slightest negligence will cause the bearing box liquid level to be low, and the bearing will be locked due to lack of lubrication. This is not only a red line fault that the department strictly prohibits, but also after the bearing box bearing locks, it takes at least 16 hours to replace the hot air drying fan. The long processing time has greatly increased the number of abnormal operations on the production line, seriously affecting the production rhythm of the production line, and also increased the risk of injury to maintenance personnel due to abnormal operations and increased the labor intensity of maintenance personnel. Oil leakage from the bearing box seal also exists in other mechanical equipment and other fields that use bearings. If this problem is solved, the sealing effect of the bearing will be significantly improved. Utility Model Content
[0004] The present application aims to solve the technical problem of oil leakage at the bearing box seal to at least a certain extent. To this end, the present application provides a bearing device and a fan that can prevent leakage, which can solve the oil leakage problem at the bearing seal and ensure an effective sealing effect, thereby avoiding the occurrence of bearing locking failure in the bearing box and ensuring that normal production is not affected.
[0005] The embodiment of the present application provides a bearing device for preventing leakage, which includes:
[0006] Bearing housing;
[0007] Axis of rotation;
[0008] The bearing is installed in the bearing box, and the bearing sleeve is arranged on the rotating shaft;
[0009] The bearing side cover is used to enclose the bearing in the bearing box. The inner edge of the bearing side cover is sleeved on the rotating shaft and sealed with the rotating shaft, and the outer edge of the bearing side cover is fastened to the bearing box; wherein, the inner edge surface of the bearing side cover is provided with a sealing groove arranged along the circumferential direction, and the outer circumference of the rotating shaft is provided with a protrusion, which matches the sealing groove to form a sealing path bent along the extension direction of the rotating shaft.
[0010] In an optional embodiment, a plurality of sealing grooves and a plurality of protrusions are provided respectively, and the plurality of sealing grooves and the plurality of protrusions are arranged along the extension direction of the rotating shaft.
[0011] In an optional embodiment, a sealing ring is provided between the bearing side cover and the rotating shaft, and the sealing ring is away from the bearing relative to the sealing channel.
[0012] In an optional embodiment, an oil retaining ring is further included, which is sleeved on the rotating shaft, the side of the bearing side cover facing the bearing is the inner side, and the oil retaining ring is located on the inner side of the bearing side cover.
[0013] In an optional embodiment, the inner side of the bearing side cover extends toward the bearing with an inner extension section, the oil retaining ring is bent to form a bent end, the inner extension section is inserted between the bent end and the rotating shaft, and the oil retaining ring and the rotating shaft are sealed.
[0014] In an optional embodiment, the oil deflector ring is interference fit with the rotating shaft.
[0015] In an optional embodiment, a packing gland is further included, which is sleeved on the rotating shaft, the side of the bearing side cover opposite to the bearing is the outer side, and the packing gland is tightly connected to the outer side of the bearing side cover.
[0016] In an optional implementation, there is a gap between the packing gland, the bearing side cover and the rotating shaft, and a packing seal is provided in the gap.
[0017] In an optional embodiment, two bearings and two bearing side covers are provided, and the bearing boxes are extended from both ends of the rotating shaft respectively.
[0018] A fan comprises the above-mentioned bearing device for preventing leakage.
[0019] It can be seen from the above technical solution that the beneficial effects of this application are:
[0020] The present application forms a connection and closure between the outside of the rotating shaft and the bearing box through the bearing side cover. The inner edge of the bearing side cover and the rotating shaft can be regarded as the original key oil leakage point, and the inner edge of the bearing side cover is provided with a sealing groove and the rotating shaft is provided with a protrusion. The sealing groove and the protrusion form a concave-convex matching structure. In this way, the original sealing channel length is increased between the bearing side cover and the rotating shaft, and a curved or bent sealing channel is formed, thereby increasing the flow resistance of the sealing liquid between the inner and outer sides of the bearing side cover, which not only reduces the flow speed and kinetic energy of the sealing liquid, but also significantly reduces the pressure of the sealing oil passing through the above-mentioned sealing channel, thereby preventing the sealing liquid from flowing out. In this way, the oil leakage problem at the bearing seal can be solved, and an effective sealing effect can be ensured, thereby avoiding the occurrence of bearing locking failures in the bearing box and ensuring that normal production is not affected. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other embodiments and drawings can be obtained based on these drawings without creative work.
[0022] Figure 1 A schematic diagram of an embodiment of a bearing device for preventing leakage of the utility model is shown;
[0023] Figure 2 Shows Figure 1 The enlarged schematic diagram at the middle dotted line;
[0024] Attached figures: 100, bearing device; 110, rotating shaft; 111, protrusion; 120, bearing box; 130, bearing; 140, oil retaining ring; 141, bent end; 150, bearing side cover; 151, sealing groove; 152, sealing channel; 153, inner extension; 160, packing gland; 170, packing seal. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments 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.
[0026] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0028] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0029] The present application is described below with reference to the accompanying drawings and specific embodiments:
[0030] Please refer to Figure 1 and Figure 2 In the first aspect of the present application, an embodiment provides a bearing device for preventing leakage. The sealing structure of the bearing 130 of the hot air dryer is used as an example for explanation. The bearing device 100 includes a bearing box 120, a rotating shaft 110, a bearing 130 and a side cover of the bearing 130. The bearing box 120 is provided with a mounting position for the bearing 130, such as a slot. The rotating shaft 110 is located in the bearing box 120, and both ends extend out of the bearing box 120. Specifically, the bearing box 120 is provided with shaft holes of the rotating shaft 110 at the left and right relative positions in the figure, respectively. The rotating shaft 110 passes through the two shaft holes. The rotating shaft 110 is the fan rotating shaft 110 of the hot air dryer. The rotating shaft 110 is horizontally arranged as shown in the figure. Both ends of the rotating shaft 110 pass through the bearing box 120 and extend to the outside of the bearing box 120. The bearing 130 is installed and fixed at the slot of the bearing box 120. The bearing 130 is sleeved on the rotating shaft 110. The bearing 130 adopts a cylindrical roller bearing 130, and other bearings 130 can also be used. The outer ring of the bearing 130 is used to connect to the bearing box 120 of the hot air dryer, and the inner ring is used to connect to the rotating shaft 110. The outer circumferential surface of the bearing 130 is installed in the bearing box 120 by snapping into the slot, and one side of the bearing 130 is limited by a bearing 130 side cover connected to the slot, and the bearing 130 side cover is used to enclose the bearing 130 in the bearing box 120 so that the bearing 130 is not exposed to the shaft hole.
[0031] The side cover of the bearing 130 is annular and forms a cover shape on one side. The side cover of the bearing 130 has an outer edge and an inner edge. The inner edge of the side cover of the bearing 130 is sleeved on the rotating shaft 110 and sealed with the rotating shaft 110. First, the side cover of the bearing 130 needs to be sealed with the rotating shaft 110. An oil seal can be used. The gap between the inner edge of the side cover of the bearing 130 and the rotating shaft 110 is minimized. The outer edge of the side cover of the bearing 130 is fastened to the bearing box 120. The outer edge of the side cover of the bearing 130 is provided with a threaded hole, as shown in the figure. The corresponding position of the bearing box 120 is also provided with a threaded hole. The side cover of the bearing 130 is fastened to the shaft hole of the bearing box 120 by a screw, and the outer edge side of the side cover of the bearing 130 is against the outer ring of the bearing 130 for axial positioning; wherein, The inner edge surface of the side cover of the bearing 130 in contact with the rotating shaft 110 is concavely provided with a plurality of sealing grooves 151, and the outer periphery of the rotating shaft 110 is provided with a plurality of protrusions 111, and the protrusions 111 correspond to the sealing grooves 151 one by one, and all the protrusions 111 match all the sealing grooves 151 and form a sealing path 152 along the extension direction of the rotating shaft 110, and the sealing path 152 is bent along the gap between the sealing groove 151 and the protrusion 111, so that a labyrinth seal structure is formed between the rotating shaft 110 and the side cover of the bearing 130, and its function is to convert pressure into speed, and the pressure of the sealing liquid is significantly reduced after passing through the gap, and the speed is also reduced, so that a non-contact sealing effect is played between the fan rotating shaft 110 and the side cover of the bearing 130, that is, a non-contact dynamic seal.
[0032] The bearing box 120 seal of the prior art is prone to oil leakage. The reason is that the contact position between the bearing box 120 and the rotating shaft 110 is prone to leakage. Since the rotating shaft 110 keeps rotating all the time, a gap is likely to be generated between the rotating shaft 110 hole set in the bearing box 120 during its rotation. If the force is unbalanced, the gap is more likely to expand, which will cause the sealing oil to leak out. However, the present application forms a connection and seal between the outside of the rotating shaft 110 and the bearing box 120 through the bearing 130 side cover. The inner edge of the bearing 130 side cover and the rotating shaft 110 can be regarded as the original key oil leakage point, and the inner edge of the bearing 130 side cover is provided with a sealing groove 151, and the rotating shaft 110 is provided with a protrusion 111. The sealing groove 151 and the protrusion 111 form a concave-convex matching structure. In this way, the original sealing channel length is increased between the bearing 130 side cover and the rotating shaft 110, and a curved or bent sealing channel is formed, thereby increasing the sealing liquid in the bearing 130 side cover. The flow resistance between the inner and outer sides not only reduces the flow speed and kinetic energy of the sealing liquid, but also significantly reduces the pressure of the sealing oil passing through the above-mentioned sealing channel, thereby preventing the sealing liquid from flowing out. This can solve the oil leakage problem at the seal of the bearing 130 and ensure an effective sealing effect, thereby avoiding the occurrence of a locking failure of the bearing 130 in the bearing box 120, ensuring that normal production is not affected and ensuring that the on-site working environment is clean and oil-free; at the same time, due to the better sealing effect, the maintenance frequency of the bearing 130 and the bearing box 120 is also reduced, reducing the risk of injury and labor intensity of maintenance personnel.
[0033] In an optional embodiment, the sealing groove 151 is arranged around the inner edge of the side cover of the bearing 130, that is, the sealing groove 151 is an annular groove, so that there are multiple circles of annular grooves on the inner edge of the side cover of the bearing 130, and the annular grooves are spaced apart. In an optional embodiment, the protrusion 111 is arranged around the circumference of the rotating shaft 110, that is, the protrusion 111 is an annular convex ring, so that there are multiple circles of annular protrusions 111 on the circumference of the rotating shaft 110, and the annular protrusions 111 are spaced apart. In an optional embodiment, the number of the sealing grooves 151 and the protrusions 111 is greater than or equal to 3, and the multiple sealing grooves 151 and the multiple protrusions 111 are arranged along the extension direction of the rotating shaft 110, so that a curved sealing channel 152 is formed in the extension direction of the rotating shaft 110, and the sealing channel 152 is filled with a sealing liquid, such as sealing oil, to perform dynamic sealing.
[0034] In an optional embodiment, a sealing ring is provided between the side cover of the bearing 130 and the rotating shaft 110. The sealing ring is away from the bearing 130 relative to the sealing channel 152, that is, the sealing channel 152 is located between the sealing ring and the bearing 130, and the sealing ring is closer to the outer side of the side cover of the bearing 130. Since there is sealing oil between the side cover of the bearing 130 and the rotating shaft 110 and it is a dynamic seal, the sealing channel 152 is sealed here by a sealing ring. The sealing ring is used to seal the sealing liquid between the side cover of the bearing 130 and the rotating shaft 110, further ensuring that the sealing liquid does not leak.
[0035] In an optional embodiment, an oil deflector ring 140 is also included, which is made of 45# steel to increase its own deformation resistance and wear resistance. The oil deflector ring 140 is an integral annular structure and does not use butt joints to reduce the risk of oil leakage. The oil deflector ring 140 is sleeved on the rotating shaft 110, and the side cover of the bearing 130 facing the side of the bearing 130 is the inner side, and the oil deflector ring 140 is located on the inner side of the side cover of the bearing 130. In an optional embodiment, an inner extension section 153 extends from the inner side of the side cover of the bearing 130 toward the bearing 130. The inner extension section 153 is formed at the inner edge of the side cover of the bearing 130 and protrudes toward one side of the bearing 130. The oil retaining ring 140 is bent and forms a bent end 141. The bent end 141 is bent toward the side cover of the bearing 130. The inner extension section 153 is inserted between the bent end 141 and the rotating shaft 110. Specifically, a recess is formed between the bent end 141 and the rotating shaft 110, and the inner extension section 153 is inserted into the recess, so that the oil retaining ring 140 and the rotating shaft 110 are sealed. In an optional embodiment, the oil deflector ring 140 and the rotating shaft 110 are interference fit, and a tight seal is formed between the oil deflector ring 140 and the rotating shaft 110. The sealing oil cannot pass between the oil deflector ring 140 and the rotating shaft 110, but passes through the curved gap formed between the bent end 141 and the inner extension section 153, and then enters the sealing channel 152. This arrangement increases the passage length of the sealing oil and further enhances the sealing effect.
[0036] In an optional embodiment, a packing gland 160 is also included, which is annular and sleeved on the rotating shaft 110 and is detachable. The packing gland 160 is in close contact with the outer peripheral wall of the rotating shaft 110 to prevent air leakage and oil leakage. The side cover of the bearing 130 opposite to the bearing 130 is the outer side. The packing gland 160 is tightly connected to the outer side of the side cover of the bearing 130. The outer side of the side cover of the bearing 130 is provided with a threaded hole. The packing gland 160 is provided with a through hole at a corresponding position. The packing gland 160 is fastened to the outer side of the side cover of the bearing 130 by screws. Compared with the existing fixed gland, the present application is improved to a movable gland, that is, the side cover of the bearing 130 is combined with the packing gland 160. In this way, when the dust seal is worn after the fan has been running for a period of time, the packing gland 160 can be appropriately squeezed by tightening bolts, screws or screws to appropriately deform the dust seal from thick to thin, so that the inner diameter of the dust seal becomes smaller and the outer diameter becomes larger, so that the dust seal continues to maintain the dustproof effect. In an optional embodiment, there is a gap between the stuffing gland 160 and the side cover of the bearing 130 and the rotating shaft 110. The gap is located between the inner edge of the stuffing gland 160 and the inner edge of the side cover of the bearing 130, and is located at the outer periphery of the rotating shaft 110. The gap is an oil seal filling port, and a packing seal 170 is provided in the gap. The seal is a sealing structure between the side cover of the bearing 130 and the rotating shaft 110. The packing seal 170 forms a seal between the side cover of the bearing 130, the stuffing gland 160 and the rotating shaft 110. In addition to the packing seal 170, other seals for oil seals may also be used.
[0037] By applying the present application to the hot air dryer of the rolling mill, the bearing 130 of the two hot air drying fans in the existing production line is avoided from locking due to lack of lubrication. Assuming that the locking failure of the bearing 130 occurs once a year, according to the average production speed of the degreasing production line, 3 rolls of steel can be produced per hour, each roll is 20 tons, and the profit per ton is 300 yuan. After the improvement, the profit can be increased by 300*20*3*16*2=576,000 yuan per year; before the improvement, the 1# and 2# hot air drying fans need to be refueled once a week, and the refueling amount is 5L. There are 51 weeks in a year, so 5*51*2=510L of refueling is required per year. A barrel of 32# turbine oil is 170L, and the purchase price is 3,200 yuan. After the improvement, the lubricant purchase cost can be saved by 3,200*510 / 170=9,600 yuan per year; therefore, after the improvement, the total profit can be increased by 576,000+9,600=585,600 yuan per year.
[0038] The second aspect of the present application provides a fan, which includes the above-mentioned anti-leakage bearing device. The fan is a degreasing hot air drying fan in a rolling mill. The internal driving part has a rotating structure, and the rotating structure is realized by a bearing. The above-mentioned bearing device 100 is also used at the installation of the bearing, including a bearing box 120, a rotating shaft 110, a bearing 130 and a side cover of the bearing 130. The specific installation structure is as mentioned above. Through the above-mentioned bearing device 100, the bearing of the fan has a better sealing effect, reduces oil leakage, thereby avoiding the occurrence of bearing locking failure in the bearing box, and ensuring that normal production is not affected.
[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", "optional example" or "optional implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.
[0040] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0041] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.
Claims
1. A bearing device for preventing leakage, characterized in that: include: Bearing box (120); A rotation axis (110); A bearing (130) is installed in the bearing box (120), and the bearing (130) is sleeved on the rotating shaft (110); a bearing side cover (150) for sealing the bearing (130) in the bearing box (120); an inner edge of the bearing side cover (150) is sleeved on the rotating shaft (110) and sealed with the rotating shaft (110); and an outer edge of the bearing side cover (150) is fastened to the bearing box (120); The inner edge surface of the bearing side cover (150) is provided with a sealing groove (151) arranged along the circumferential direction, and the rotating shaft (110) is provided with a protrusion (111) along the circumferential direction, and the protrusion (111) matches the sealing groove (151) to form a sealing channel (152) bent along the extension direction of the rotating shaft (110).
2. The leakage-proof bearing device according to claim 1, characterized in that: A plurality of the sealing grooves (151) and a plurality of the protrusions (111) are provided respectively, and the plurality of the sealing grooves (151) and the plurality of the protrusions (111) are arranged alternately along the extension direction of the rotating shaft (110).
3. The leakage-proof bearing device according to claim 2, characterized in that: A sealing ring is provided between the bearing side cover (150) and the rotating shaft (110), and the sealing ring is away from the bearing (130) relative to the sealing channel (152).
4. The leakage-proof bearing device according to claim 3, characterized in that: It also includes an oil deflector ring (140) sleeved on the rotating shaft (110), the side of the bearing side cover (150) facing the bearing (130) being the inner side, and the oil deflector ring (140) is located on the inner side of the bearing side cover (150).
5. The leakage-proof bearing device according to claim 4, characterized in that: An inner extension section (153) is extended from the inner side of the bearing side cover (150) toward the bearing (130); the oil deflector ring (140) is bent to form a bent end (141); the inner extension section (153) is inserted between the bent end (141) and the rotating shaft (110); and a seal is formed between the oil deflector ring (140) and the rotating shaft (110).
6. The leakage-proof bearing device according to claim 4, characterized in that: The oil deflector ring (140) and the rotating shaft (110) are interference fit.
7. The leakage-proof bearing device according to claim 3, characterized in that: It also includes a packing gland (160) which is sleeved on the rotating shaft (110), the side of the bearing side cover (150) opposite to the bearing (130) being the outer side, and the packing gland (160) is tightly connected to the outer side of the bearing side cover (150).
8. The leakage-proof bearing device according to claim 7, characterized in that: A gap is provided between the packing gland (160), the bearing side cover (150) and the rotating shaft (110), and a packing seal ring (170) is provided in the gap.
9. The bearing device for preventing leakage according to claim 1, characterized in that: Two bearings (130) and two bearing side covers (150) are provided, and the bearing boxes (120) are respectively extended from both ends of the rotating shaft (110).
10. A fan, characterized in that: A bearing device for preventing leakage comprising the bearing device described in any one of claims 1-9.