Bearing sealing structure
By employing a modular sealing structure and labyrinth design, the problem of sand shot intrusion into bearing seals under sandblasting conditions is solved, achieving efficient sealing and cost reduction, and facilitating large-scale application.
Patent Information
- Application Number
- CN202520220922.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-02-11
AI Technical Summary
Existing bearing sealing structures cannot effectively prevent sand and shot from entering under surface sandblasting conditions, leading to bearing damage. Furthermore, existing complex sealing structures are costly and not suitable for large-scale promotion.
The assembly-type sealing structure includes an assembly housing one, an assembly housing two, a bushing, a gasket, and a skeleton-type sealing ring, forming a multi-layer labyrinth seal. Combined with the sand leakage holes on the bushing, it prevents sand shot from entering, and the multi-layer sealing structure is achieved through bolt connection.
It effectively prevents sand shot from entering the bearing, improves bearing life and equipment reliability, reduces production costs, and facilitates large-scale application.
Smart Images
Figure CN223594976U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bearing seal technical field, concretely relates to a bearing seal structure. BACKGROUND
[0002] In the surface sand blasting treatment environment, the existing bearing seal structure faces many challenges, which leads to its inability to effectively prevent the sand from entering the bearing interior.
[0003] Firstly, the traditional bearing seal design is usually based on the dust and water prevention requirements in the conventional industrial environment, without fully considering the high speed and high kinetic energy characteristics of the sand in the sand blasting process. These sand balls have extremely high hardness and impact force, which can easily penetrate or wear out the existing sealing materials and structures. Secondly, many traditional sealing structures rely on simple rubber or metal sealing rings, and the small gap between these sealing elements is sufficient to block dust and water droplets under normal conditions, but in the sand blasting environment, the sand can enter the bearing interior through these gaps, causing serious wear. In addition, although some sealing designs have certain protection functions, due to the need to maintain a certain rotational flexibility to meet the working requirements of the bearing, there is inevitably a small active space, which also provides an opportunity for the sand to enter. More complicatedly, in order to balance the protection performance and friction loss, some sealing structures often adopt a loose design, which further weakens their effective blocking ability to small particles. These problems work together to make the existing bearing seal structure appear inadequate when facing the extreme working condition of sand blasting, frequently leading to internal damage of the bearing, high failure rate, and seriously affecting the reliability and service life of the equipment.
[0004] At present, although there are some sealing structures that can be used for bearing sealing, such as complete sealing structures, their structure is complex, and the requirements for processing technology and equipment are high, leading to high cost, which is not convenient for large-scale popularization and application. UTILITY MODEL CONTENTS
[0005] The utility model intends to provide a bearing seal structure to solve the technical problem that the existing bearing seal structure is easy to enter the bearing interior when used in the surface sand blasting treatment environment, leading to bearing damage, while reducing the cost of the sealing structure, improving its reliability and applicability.
[0006] The utility model provides a basic scheme provided by the utility model discloses a bearing sealing structure, including assembly casing one, assembly casing two, bush, washer and framework type sealing ring, the outside of assembly casing one is provided with the assembly position of framework type sealing ring, and the framework type sealing ring is installed at the assembly position, and assembly casing one and framework type sealing ring structure cooperation form third heavy sealing, assembly casing two is installed in the outside of assembly casing one, the inside of assembly casing two is provided with the sealed step structure of adapting with washer, and washer is installed at the sealed step structure, and assembly casing two and washer structure cooperation form second heavy sealing structure, the inside of bush is provided with the sealed step structure of adapting with assembly casing two, and bush is installed in the outside of assembly casing two, and bush and assembly casing two structure cooperation form first heavy sealing structure, a plurality of sand holes are provided on the bush,
[0007] Assembly casing one, assembly casing two are all assembled with the shaft gap, and the bush, washer and framework type sealing ring are all assembled with the shaft.
[0008] The utility model discloses a working principle and the advantage lies in: adopt assembly type sealing structure, when using, the bush is assembled into assembly casing one and assembly casing two through specific cooperation, guarantees assembly accuracy. Then, install washer to assembly casing two, make it with assembly casing two form second heavy sealing structure. Then, install framework type sealing ring to the assembly position of assembly casing one, ensure that the lip of framework type sealing ring keeps the interference with the shaft. Finally, assembly casing one and assembly casing two are assembled and connected, and assembly casing one, assembly casing two are all assembled with the shaft gap, and the bush, washer and framework type sealing ring are all assembled with the shaft, complete the assembly of whole bearing sealing structure and reasonable transmission structure.
[0009] Compared with prior art, the utility model discloses a labyrinth sealing principle, through the synergies of assembly casing one, assembly casing two, bush, washer and framework type sealing ring, form multiple and various sealing structure, when using specifically, from outside to inside, first heavy sealing structure, second heavy sealing structure and third heavy sealing structure realize sand blocking in proper order, can effectively prevent sand and other foreign matters from entering the bearing interior, greatly reduce the damage risk of bearing in the surface sand blasting treatment environment, improve the service life of bearing and the reliability of equipment, and the sand hole that the bush sets up can throw out part of sand that enters the sealing structure when running, reduce the stacking of sand, further improve the sealing effect, prolong the effective working time of sealing structure.
[0010] The sealing structure design of the utility model is simple, and only needs simple mechanical processing equipment to realize the processing and manufacturing of each component, reduces production cost, compared with the existing complex complete sealing structure, has the remarkable cost advantage, is convenient for large-scale popularization and application, especially is suitable for surface sand blasting treatment application scene. ACCURACY
[0011] Figure 1 This is a schematic diagram of a bearing sealing structure provided in an embodiment of the present utility model;
[0012] Figure 2 for Figure 1 A partial schematic diagram of A in the middle.
[0013] The markings in the accompanying drawings include: Assembly housing 1, Assembly housing 2, Bushing 3, Sand leakage hole 31, Washer 4, Skeleton-type sealing ring 5, Shaft 6. Detailed Implementation
[0014] The following detailed explanation illustrates the specific implementation methods:
[0015] To better illustrate the direction, Figure 1 The arrows indicate the direction from the inside to the outside. Figure 1 and Figure 2 The different colors used to distinguish the various parts are simply to make the components clearer.
[0016] The basic implementation examples are as follows: Figure 1 As shown: A bearing sealing structure includes a first assembly housing 1, a second assembly housing 2, a bushing 3, a gasket 4, and a skeleton-type sealing ring 5.
[0017] The outer side of the assembly housing 1 is provided with an assembly position for the skeleton-type sealing ring 5. The skeleton-type sealing ring 5 is installed at the assembly position, and the assembly housing 1 and the skeleton-type sealing ring 5 cooperate to form a third seal.
[0018] Specifically, the upper and inner parts of the skeleton seal ring 5 are fitted to the assembly housing 1. The interference fit between the lip of the skeleton seal ring 5 and the shaft 6 is 1-1.2mm. The skeleton material of the skeleton seal ring 5 is carbon steel, and the sealing rubber material is nitrile rubber.
[0019] The second assembly housing 2 is installed on the outside of the first assembly housing 1. The inner side of the second assembly housing 2 is provided with a sealing step structure that is compatible with the gasket 4. The gasket 4 is installed at the sealing step structure. The second assembly housing 2 and the gasket 4 cooperate to form a second sealing structure.
[0020] Specifically, the assembly shell two 2 is in a Z-shaped structure, and the inclination angle is 90°. The assembly shell one 1 and the assembly shell two 2 are connected by bolts, and the number of connection points is 4-8, which are evenly distributed on the connecting edges of the assembly shell one 1 and the assembly shell two 2. The assembly shell one and the assembly shell two 2 are made of Q235 material, and the tensile strength of the material is 370-500 MPa, and the yield strength is 185-235 MPa. The height and width of the sealing step structure of the assembly shell two 2 have a height difference and a width difference with the height and width of the gasket 4, respectively, the height difference Δh1 is 1-7 mm, and the width difference Δw1 is 4-8 mm; the step height of the sealing step structure of the assembly shell two 2 is 25-30 mm, the step width is 10-12 mm, and the inclination angle of the step is 90°. The height of the gasket 4 is 23-25 mm, and the width is 4-6 mm. The gasket 4 is made of Q235, and the hardness of the material is HB110-130.
[0021] The inner side of the bushing 3 is provided with a sealing step structure matched with the assembly shell two 2, the bushing 3 is installed on the outer side of the assembly shell two 2, and the bushing 3 and the assembly shell two 2 are matched to form a first heavy sealing structure; a plurality of sand leakage holes 31 are arranged on the bushing 3.
[0022] Specifically, the bushing 3 is installed on the outer side of the assembly shell two 2, and has a width gap Δw3 of 1-2 mm, which has the effect of preliminary sealing; the height and width of the sealing step structure of the bushing 3 have a height difference and a width difference with the height and width of the structure at the assembly of the assembly shell two 2, respectively, the height difference Δh2 is 1-2 mm, and the width difference Δw2 is 1-2 mm. The bushing 3 and the assembly shell two 2 are assembled by transition fit, and the fit tolerance is 0.01-0.03 mm.
[0023] The plurality of sand leakage holes 31 are evenly distributed on the circumferential surface of the bushing 3; the shape of the sand leakage hole 31 is circular, the hole diameter of the sand leakage hole 31 is 5-8 mm, the number of the sand leakage hole 31 is 2, and the included angle between the center line of the sand leakage hole 31 and the shaft 6 line of the bushing 3 is 90°.
[0024] As shown in Figure 2 As shown in
[0025] The axial length of the bearing sealing structure is 160-190mm, preferably 170mm, and the maximum radial dimension is 45-80mm, preferably 60mm, which is suitable for most conventional bearings.
[0026] In the specific use process, the bushing 3 is assembled into the assembly shell one 1 and the assembly shell two 2 through a specific matching mode to ensure assembly accuracy. Then, the gasket 4 is installed on the assembly shell two 2 to form a second heavy sealing structure with the assembly shell two 2. Then, the skeleton sealing ring 5 is installed on the assembly position of the assembly shell one 1 to ensure that the lip of the skeleton sealing ring 5 maintains a suitable interference amount with the shaft 6. Finally, the assembly shell one 1 and the assembly shell two 2 are connected through bolts to complete the assembly of the entire bearing sealing structure.
[0027] When the bearing sealing structure is used in a surface sandblasting environment, the components of the sealing structure are regularly checked to see if there is sand accumulation, component wear, etc. If the sand leakage hole is found to be blocked, it is cleaned in time; if the components are found to be worn, they are independently replaced or repaired according to the degree of wear, so that the sealing structure is always in good working condition, and the independent component replacement and repair reduce the maintenance and replacement costs.
[0028] The bearing sealing structure provided by the embodiment adopts a labyrinth sealing principle, and through the synergistic effect of the assembly shell one, the assembly shell two, the bushing, the gasket and the skeleton sealing ring, a multiple and various sealing structure is formed, which effectively prevents foreign matters such as sand from entering the inside of the bearing, greatly reduces the damage risk of the bearing in a surface sandblasting environment, and improves the service life of the bearing and the reliability of the equipment; meanwhile, the sand leakage hole provided on the bushing can shake out part of the sand entering the sealing structure during operation, reduces the stacking of the sand, further improves the sealing effect, and prolongs the effective working time of the sealing structure. The bearing sealing structure of the scheme has a simple design, and only simple mechanical processing equipment is needed to realize the processing and manufacturing of the components, which reduces the production cost and has a significant cost advantage compared with the existing complex complete sealing structure, and is convenient for large-scale popularization and application.
[0029] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.
Claims
1. A bearing sealing structure, characterized in that, The system includes a first assembly housing, a second assembly housing, a bushing, a gasket, and a skeleton-type sealing ring. The first assembly housing has an assembly position for the skeleton-type sealing ring on its outer side, where the sealing ring is installed. The first assembly housing and the skeleton-type sealing ring cooperate to form a third layer of seal. The second assembly housing is installed on the outer side of the first assembly housing, and its inner side has a sealing step structure adapted to the gasket. The gasket is installed at this sealing step structure, and the second assembly housing and the gasket cooperate to form a second layer of seal. The bushing has a sealing step structure adapted to the second assembly housing on its inner side, and is installed on the outer side of the second assembly housing. The bushing and the second assembly housing cooperate to form a first layer of seal. The bushing has several sand-leaking holes. Both assembly housing one and assembly housing two are fitted with the shaft with clearance; the bushing, gasket and skeleton seal are fitted to the shaft.
2. The bearing sealing structure according to claim 1, characterized in that, The plurality of sand leakage holes are evenly distributed on the circumferential surface of the bushing; the shape of the sand leakage hole is circular, the diameter of the sand leakage hole is 5-8mm, the number of sand leakage holes is 2, and the angle between the center line of the sand leakage hole and the axis of the bushing is 90°.
3. The bearing sealing structure according to claim 1, characterized in that, The gap between the assembly housing one and the shaft clearance is 0.05-0.2mm.
4. The bearing sealing structure according to claim 1, characterized in that, The sealed stepped structure of the second assembly housing has a step height of 25-30mm, a step width of 10-12mm, and a step inclination angle of 90°.
5. A bearing sealing structure according to claim 1, characterized in that, The height of the washer is 23-25mm and the width is 4-6mm.
6. A bearing sealing structure according to claim 1, characterized in that, The interference fit between the lip of the skeleton seal and the shaft is 1-1.2 mm.
7. A bearing sealing structure according to claim 1, characterized in that, The first and second assembly housings are connected by bolts, with 4-8 connection points evenly distributed along the connection edges of the first and second assembly housings.
8. A bearing sealing structure according to claim 1, characterized in that, The bushing and the second assembly housing are assembled using a transition fit with a tolerance of 0.01-0.03 mm.
9. A bearing sealing structure according to claim 1, characterized in that, The assembly housing component one, assembly housing component two, and gaskets are all made of Q235 steel.
10. A bearing sealing structure according to claim 1, characterized in that, The overall axial length of the bearing sealing structure is 160-190mm, and the maximum radial dimension is 45-80mm.