Bearing sealing structure of grading crusher

Abstract

The utility model relates to the technical field of bearing sealing, and provides a grading crusher bearing sealing structure which comprises a bearing seat arranged on a grading crusher, and the grading crusher is provided with a crushing cavity; the first bearing is arranged in the bearing seat; one end of the main shaft extends out of the crushing cavity and abuts against the inner wall of the first bearing; one side of the bearing transparent cover abuts against the side, close to the crushing cavity, of the first bearing, and a plurality of annular grooves are formed in the other side of the bearing transparent cover; the first shaft sleeve is arranged on the main shaft and rotates synchronously with the main shaft, a plurality of protruding rings are arranged on one side of the first shaft sleeve, each protruding ring is located in the corresponding annular groove, and a rotating gap is formed between each protruding ring and the corresponding annular groove and is in a bow shape. By means of the technical scheme, the problem that in the prior art, when a grading crusher is used for production, a large amount of dust is generated in the crushing cavity, and the dust easily intrudes into a bearing, so that the bearing is damaged is solved.

Description

Technical Field

[0001] This utility model relates to the field of bearing sealing technology, specifically to a bearing sealing structure for a grading crusher. Background Technology

[0002] In numerous industrial sectors such as mineral processing and coal mining, classifying crushers play a crucial role, effectively crushing materials to meet the particle size requirements of various production processes. However, in the actual production and use of classifying crushers, a serious and urgent problem needs to be solved.

[0003] As the core area for material crushing, the crushing chamber inevitably generates a large amount of fine dust particles during the crushing, grinding, and conveying processes. These dust particles create a diffuse environment inside the crushing chamber, and because the crushing chamber is usually in a relatively complex mechanical environment with factors such as airflow disturbance and material impact vibration, the dust has strong fluidity and diffusion properties, making it extremely easy to spread into the surrounding space.

[0004] As a critical support and rotating component, the bearings of a grading crusher directly affect the normal operation of the entire equipment. Once dust enters the bearings, it will cause a series of serious problems. First, dust has a certain abrasiveness and will rub against the balls, raceways, and cages inside the bearing. Over time, this gradually wears down the surfaces of these components, damaging their original precision and smoothness, leading to increased friction and operating resistance. Second, dust intrusion may also alter the lubrication environment inside the bearing, contaminating the grease, reducing its lubrication performance, accelerating wear between components, and even causing grease failure, further deteriorating the bearing's operating conditions. Utility Model Content

[0005] This utility model proposes a bearing sealing structure for a classifying crusher, which solves the problem in related technologies where a large amount of dust is generated in the crushing chamber during the production and use of the classifying crusher, and the dust can easily penetrate into the bearing, causing damage to the bearing.

[0006] The technical solution of this utility model is as follows:

[0007] The bearing sealing structure of the grading crusher includes:

[0008] A bearing housing for mounting on a classifying crusher having a crushing chamber;

[0009] A first bearing is disposed within the bearing housing;

[0010] A main shaft is rotatably disposed within the crushing chamber, with one end of the main shaft extending out of the crushing chamber and abutting against the inner wall of the first bearing;

[0011] A bearing cover is disposed inside the bearing housing. One side of the bearing cover abuts against the side of the first bearing near the crushing chamber, and the other side has several annular grooves.

[0012] The first bushing is disposed on the main shaft and rotates synchronously with the main shaft. One side of the first bushing has several protruding rings, each of which is located in the annular groove. A rotational gap is formed between the protruding ring and the annular groove, and the rotational gap is bow-shaped.

[0013] Optionally, it also includes:

[0014] A dustproof baffle is disposed between the bearing housing and the grading crusher.

[0015] Optionally, it also includes:

[0016] The first oil seal is disposed within the rotational clearance and located at one end of the rotational clearance near the first bearing.

[0017] Optionally, the first oil seal has two parts, and the lips of both first oil seals face the crushing chamber.

[0018] Optionally, the first bushing also has a plurality of serrated grooves, which are located at one end of the rotational clearance near the crushing chamber.

[0019] Optionally, it also includes:

[0020] The second bushing is disposed on the main shaft, and one side of the second bushing abuts against the side of the first bearing away from the crushing chamber. The second bushing rotates synchronously with the main shaft.

[0021] Optionally, it also includes:

[0022] The second oil seal is disposed between the second bushing and the bearing housing.

[0023] Optionally, the second oil seal has two parts, with the lips of the two second oil seals being far apart from each other.

[0024] Optionally, it also includes:

[0025] A pressure cap is disposed at the end of the bearing housing away from the crushing chamber;

[0026] A dustproof sealing ring is disposed between the pressure cap and the bearing housing.

[0027] Optionally, it also includes:

[0028] A felt sealing ring is disposed between the gland and the main shaft.

[0029] The working principle and beneficial effects of this utility model are as follows:

[0030] In this invention, to address the problem of excessive dust generation within the crushing chamber of a grading crusher during production and use, which can easily penetrate the bearings and cause damage, a bearing sealing structure for a grading crusher is designed. The main shaft passes through the crushing chamber, with one end extending out and tightly abutting against the inner wall of the first bearing, ensuring smooth rotation of the main shaft within the crushing chamber and effective force transmission. A bearing cover is then installed in the bearing housing, with one side fitting against the side of the first bearing closest to the crushing chamber. Several annular grooves are machined on the other side of the bearing cover. A first bushing is fitted onto and fixed to the main shaft, allowing it to rotate synchronously with the main shaft. Several protruding rings corresponding to the annular grooves of the bearing cover are machined on one side of the first bushing, with each protruding ring embedded in an annular groove, forming an arc-shaped rotational clearance between the protruding ring and the annular groove.

[0031] The advantage is that the special bow-shaped rotating gap structure formed by the convex ring and the ring groove increases the tortuosity and resistance of the path for dust to enter the bearing, effectively preventing most of the dust in the crushing chamber from directly invading the bearing, reducing dust damage to the bearing, extending the service life of the bearing, and improving the overall stability and reliability of the grading crusher. Attached Figure Description

[0032] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0033] Figure 1 This is a schematic diagram of the structure of this utility model;

[0034] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0035] Figure 3 This utility model Figure 1 Enlarged view of section B in the middle.

[0036] In the diagram: 1. Grading crusher; 101. Crushing chamber; 2. Bearing housing; 3. First bearing; 4. Main shaft; 5. Bearing cover; 501. Annular groove; 6. First bushing; 601. Convex ring; 602. Rotation clearance; 7. Dustproof baffle; 8. First oil seal; 603. Serrated groove; 9. Second bushing; 10. Second oil seal; 11. Pressure cap; 12. Dustproof sealing ring; 13. Felt sealing ring. Detailed Implementation

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0038] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0039] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Reference Figures 1-3 This is the first embodiment of the present invention, which proposes a bearing sealing structure for a grading crusher, including a bearing seat 2, which is used to mount a grading crusher 1, the grading crusher 1 having a crushing chamber 101; a first bearing 3 mounted in the bearing seat 2; a main shaft 4 rotatably mounted in the crushing chamber 101, one end of the main shaft 4 extending out of the crushing chamber 101 and abutting against the inner wall of the first bearing 3; a bearing cover 5 mounted in the bearing seat 2, one side of the bearing cover 5 abutting against the side of the first bearing 3 near the crushing chamber 101, and the other side having several annular grooves 501; a first bushing 6 mounted on the main shaft 4 and rotating synchronously with the main shaft 4, the first bushing 6 having several protruding rings 601 on one side, each protruding ring 601 being located in an annular groove 501, and a rotational gap 602 being formed between the protruding ring 601 and the annular groove 501, the rotational gap 602 being bow-shaped.

[0042] In this embodiment, to address the problem of excessive dust generated within the crushing chamber during production and use of the grading crusher in related technologies, which easily intrudes into the bearings and causes damage, a bearing sealing structure for the grading crusher is designed. The main shaft 4 passes through the crushing chamber 101, with one end extending out of the chamber and tightly abutting against the inner wall of the first bearing 3, ensuring smooth rotation of the main shaft 4 within the crushing chamber 101 and effective force transmission. Then, the bearing cover 5 is installed inside the bearing seat 2, with one side fitting against the side of the first bearing 3 closest to the crushing chamber 101. Several annular grooves 501 are machined on the other side of the bearing cover 5. A first bushing 6 is fitted onto and fixed to the main shaft 4, allowing it to rotate synchronously with the main shaft 4. Several protruding rings 601 corresponding to the annular grooves 501 of the bearing cover 5 are machined on one side of the first bushing 6. Each protruding ring 601 is embedded within an annular groove 501, forming an arc-shaped rotational gap 602 between the protruding ring 601 and the annular groove 501.

[0043] The advantage is that the special bow-shaped rotation gap 602 structure formed by the convex ring 601 and the ring groove 501 increases the tortuosity and resistance of the path for dust to enter the bearing, effectively preventing most of the dust in the crushing chamber 101 from directly invading the bearing, reducing the damage of dust to the bearing, extending the service life of the bearing, and improving the overall stability and reliability of the grading crusher 1.

[0044] Furthermore, it also includes a dust baffle 7, which is disposed between the bearing housing 2 and the grading crusher 1.

[0045] In this embodiment, a dust baffle 7 is installed at the connection between the bearing housing 2 and the classifying crusher 1. The dust baffle 7 is made of metal and is firmly fixed between the two by bolts or welding.

[0046] The advantage is that the dust baffle 7 forms a physical barrier between the bearing housing 2 and the classifying crusher 1, which can prevent most of the dust flying near the crushing chamber 101 from spreading towards the bearing housing 2. This reduces the chance of dust approaching the bearing sealing structure from the source, further reduces the risk of dust intruding into the bearing, enhances the protective ability of the bearing sealing structure, and helps the classifying crusher 1 to operate stably for a long time.

[0047] Furthermore, it also includes a first oil seal 8, which is disposed within the rotation gap 602 and located at the end of the rotation gap 602 near the first bearing 3.

[0048] In this embodiment, a first oil seal 8 is installed within the rotation gap 602. The first oil seal 8 is positioned at the end of the rotation gap 602 near the first bearing 3, ensuring that the first oil seal 8 is properly installed and tightly fitted to the surfaces of the convex ring 601 and the annular groove 501.

[0049] The advantage is that the first oil seal 8 plays a sealing role at the rotation gap 602. Its special sealing material and structure can effectively prevent dust from entering the bearing through the gap during rotation. Even if a small amount of dust breaks through the blockage of the convex ring 601 and the ring groove 501, the first oil seal 8 can intercept it, which further improves the reliability of the bearing seal, protects the bearing from dust contamination, reduces the probability of the bearing being damaged by dust erosion, and ensures the normal operation of the grading crusher 1.

[0050] Furthermore, there are two first oil seals 8, and the lips of both first oil seals 8 face the crushing chamber 101.

[0051] In this embodiment, two first oil seals 8 are installed at the end of the rotation gap 602 near the first bearing 3. During installation, the lips of both first oil seals 8 are made to face the crushing chamber 101, and the spacing between the two oil seals is ensured to meet the technical specifications. A special installation tool is used to ensure that the oil seals are installed firmly and have a good seal.

[0052] The advantage is that the two first oil seals 8, with their lips facing the crushing chamber 101, form a double sealing barrier. When dust in the crushing chamber 101 attempts to enter the bearing under pressure, it will first encounter the obstruction of the first oil seal 8. If a very small amount of dust breaks through the first barrier, the second oil seal 8 can intercept it again, greatly improving the sealing safety factor and significantly reducing the possibility of dust entering the bearing.

[0053] Furthermore, the first bushing 6 also has several serrated grooves 603, which are located at the end of the rotation gap 602 near the crushing chamber 101.

[0054] In this embodiment, several serrated grooves 603 are machined on the first bushing 6 at the end of the rotation gap 602 near the crushing chamber 101. The advantage is that the presence of the serrated grooves 603 alters the flow state of dust at the end of the rotation gap 602 near the crushing chamber 101. When dust enters this area, it forms vortices or deposits within the serrated grooves 603, thereby reducing the speed and ability of the dust to continue moving into the bearing. This buffers and intercepts the dust, further enhancing the bearing sealing structure's resistance to dust, reducing dust contamination of the bearing, extending the bearing's service life, and ensuring the stable operation of the grading crusher 1.

[0055] Furthermore, it also includes a second bushing 9, which is mounted on the main shaft 4. One side of the second bushing 9 abuts against the side of the first bearing 3 away from the crushing chamber 101, and the second bushing 9 rotates synchronously with the main shaft 4.

[0056] In this embodiment, the second bushing 9 provides a support and protection structure for the other side of the bearing. Together with the first bushing 6, it stabilizes the relative positional relationship between the spindle 4 and the bearing, reducing the shaking and offset of the spindle 4 during rotation.

[0057] Furthermore, it also includes a second oil seal 10, which is disposed between the second bushing 9 and the bearing housing 2.

[0058] In this embodiment, the advantage of installing the second oil seal 10 between the second bushing 9 and the bearing housing 2 is that the second oil seal 10 forms an effective sealing interface between the second bushing 9 and the bearing housing 2, preventing external dust, impurities, etc. from entering the bearing from this side. It works in conjunction with the sealing structure on one side of the first bushing 6 to form all-round bearing sealing protection, further improving the integrity and reliability of the bearing seal.

[0059] Furthermore, the second oil seal 10 has two parts, and the lips of the two second oil seals 10 are far apart from each other.

[0060] In this embodiment, the two second oil seals 10 with their lips far apart form a unique bidirectional sealing structure. Dust and other contaminants coming from the outside of the bearing housing 2 are blocked by one oil seal, while a small amount of grease or impurities that may seep out from between the second bushing 9 and the main shaft 4 are intercepted by the other oil seal. This prevents contaminants from penetrating and spreading between the inner and outer sides, improves the effectiveness and durability of the seal, reduces the risk of bearing damage due to seal failure, extends the bearing maintenance cycle, and reduces the maintenance cost of the classifying crusher 1.

[0061] Furthermore, it also includes a pressure cap 11, which is located at the end of the bearing housing 2 away from the crushing chamber 101; a dustproof sealing ring 12 is located between the pressure cap 11 and the bearing housing 2.

[0062] In this embodiment, the pressure cap 11 provides protection and fixation for the end of the bearing housing 2, and the dustproof sealing ring 12 forms a reliable seal between the pressure cap 11 and the bearing housing 2, preventing external dust and other impurities from entering the interior from the end of the bearing housing 2. This further improves the bearing sealing system, reduces the adverse effects of external environmental factors on the bearing, improves the overall performance of the bearing seal, and ensures the normal operation of the bearing in the harsh working environment of the grading crusher 1.

[0063] Furthermore, it also includes a felt sealing ring 13, which is disposed between the pressure cap 11 and the main shaft 4.

[0064] In this embodiment, the felt sealing ring 13 plays an auxiliary sealing role between the gland 11 and the main shaft 4. Its fine fiber structure can adsorb and block tiny dust particles, further enhancing the sealing effect around the main shaft 4 and preventing dust from entering the bearing area from the gap between the main shaft 4 and the gland 11. Working together with other sealing components, it improves the dustproof capability of the entire bearing sealing structure and reduces the possibility of bearing damage due to dust contamination.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A bearing sealing structure for a grading crusher, characterized in that, include: Bearing housing (2), the bearing housing (2) is used to be mounted on the grading crusher (1), the grading crusher (1) having a crushing chamber (101); The first bearing (3) is disposed inside the bearing housing (2); Main shaft (4), the main shaft (4) is rotatably disposed in the crushing chamber (101), one end of the main shaft (4) extends out of the crushing chamber (101) and abuts against the inner wall of the first bearing (3); The bearing cover (5) is disposed inside the bearing seat (2). One side of the bearing cover (5) abuts against the side of the first bearing (3) near the crushing chamber (101), and the other side has several annular grooves (501). The first bushing (6) is mounted on the main shaft (4) and rotates synchronously with the main shaft (4). The first bushing (6) has several protruding rings (601) on one side. Each protruding ring (601) is located in the annular groove (501). A rotation gap (602) is formed between the protruding ring (601) and the annular groove (501). The rotation gap (602) is bow-shaped.

2. The bearing sealing structure for a graded crusher according to claim 1, characterized in that, Also includes: Dust baffle (7) is provided between the bearing seat (2) and the grading crusher (1).

3. The bearing sealing structure for a graded crusher according to claim 1, characterized in that, Also includes: The first oil seal (8) is disposed within the rotation gap (602) and located at the end of the rotation gap (602) near the first bearing (3).

4. The bearing sealing structure for a graded crusher according to claim 3, characterized in that, The first oil seal (8) has two, and the lips of the two first oil seals (8) face the crushing chamber (101).

5. The bearing sealing structure for a graded crusher according to claim 1, characterized in that, The first bushing (6) also has a plurality of serrated grooves (603), which are located at one end of the rotation gap (602) near the crushing chamber (101).

6. The bearing sealing structure for a graded crusher according to claim 1, characterized in that, Also includes: The second bushing (9) is mounted on the main shaft (4). One side of the second bushing (9) abuts against the side of the first bearing (3) away from the crushing chamber (101). The second bushing (9) rotates synchronously with the main shaft (4).

7. The bearing sealing structure for a graded crusher according to claim 6, characterized in that, Also includes: The second oil seal (10) is disposed between the second bushing (9) and the bearing housing (2).

8. The bearing sealing structure for a graded crusher according to claim 7, characterized in that, The second oil seal (10) has two, and the lips of the two second oil seals (10) are far apart from each other.

9. The bearing sealing structure for a graded crusher according to claim 1, characterized in that, Also includes: A pressure cap (11) is disposed at one end of the bearing seat (2) away from the crushing chamber (101); A dustproof sealing ring (12) is disposed between the pressure cap (11) and the bearing seat (2).

10. The bearing sealing structure for a graded crusher according to claim 9, characterized in that, Also includes: Felt sealing ring (13) is disposed between the pressure cap (11) and the main shaft (4).

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