Bearing sealing and pressing device on powder concentrator

Abstract

The utility model discloses a powder concentrator upper bearing sealing and pressing device which comprises a transmission shaft, a bearing, an adjusting nut and a pressing nut, the bearing is installed on the transmission shaft, the adjusting nut and an upper bearing spacer bush are respectively installed on the transmission shaft close to the upper end and the lower end of the bearing, and oil seals are respectively installed on the adjusting nut and the upper bearing spacer bush. A compression nut is arranged on the transmission shaft on the upper side of the adjusting nut, a limiting groove is formed in the compression nut, a rectangular groove is formed in the transmission shaft, a stop block is fixed to the compression nut, the two sides of the stop block are clamped in the limiting groove and the rectangular groove respectively, a bearing adjusting seat is installed on the outer side of a bearing, and an upper bearing cover is fixed to the upper surface of the bearing adjusting seat through a bolt. A closed space is defined by the bearing adjusting seat, the upper bearing cover, the oil seal, the upper bearing spacer bush and the adjusting nut; the structure is simple in design, the reliable sealing performance of the bearing cavity is guaranteed, and the whole bearing structure is prevented from moving up and down through the stop block.

Description

Technical Field

[0001] The utility model relates to the technical field of powder classifier bearing seals, in particular to a powder classifier upper bearing seal pressing device. Background Art

[0002] Vertical roller mill is also called vertical mill for short. It is used for grinding cement raw material, cement clinker, slag and steel slag. It has the characteristics of simple structure, low manufacturing and use cost. The powder classifier plays a vital role in the whole grinding process. After the material is ground by the roller, it is selected by the high-speed rotating powder classifier, and the qualified fine powder will be collected. In order to ensure the high-speed operation of the powder classifier, the sealing of the bearing on the powder classifier is very important. The poor sealing effect seriously affects the service life of the bearing, and then affects the use of the powder classifier. The existing sealing structure generally adopts sealing through the gland and nut. The nut fixes the gland. The problem is that the sealing effect is not good, dust can easily enter the inner side of the gland and affect the bearing life. In addition, the structure is unstable, and the nut is easy to loosen, causing the bearing to jump. In order to increase the sealing performance, a sealing ring is set. Due to the lack of a limiting structure, the sealing ring is easy to fall off.

[0003] Chinese patent application No. 201420695994.9 discloses a bearing compression sealing device, including a tapered roller bearing, a rotating shaft, a nut, a compression cover, and a bearing seat. The compression cover is directly pressed on the tapered roller bearing, and there is a labyrinth sealing gap between the compression cover and the bearing seat to protect the bearing. Although a labyrinth seal is added, it only relies on the nut for limiting and fixing. After long-term use, it will become loose, resulting in poor sealing, and the bearing is prone to up and down jumping, which cannot meet the needs of actual use. Therefore, there is an urgent need for improved technology on the market to solve the above problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a bearing sealing clamping device on a powder selection machine. The structural design is simple, which not only ensures the reliable sealing performance of the bearing cavity, but also prevents the up and down movement of the entire bearing structure through the stop block, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bearing sealing and clamping device on a powder selection machine, comprising a transmission shaft, a bearing, an adjusting nut and a clamping nut, the bearing being installed on the transmission shaft, the adjusting nut and the upper bearing spacer being respectively installed on the transmission shaft close to the upper and lower ends of the bearing, the adjusting nut and the upper bearing spacer being respectively provided with oil seals, a clamping nut being provided on the transmission shaft on the upper side of the adjusting nut, a limiting groove being provided on the clamping nut, a rectangular groove being provided on the transmission shaft, a stop block being fixed on the clamping nut, and the two sides of the stop block being respectively clamped in the limiting groove and the rectangular groove.

[0006] Furthermore, it also includes a bearing adjustment seat, which is installed on the outside of the bearing. The upper surface of the bearing adjustment seat is fixed with an upper bearing cover by bolts. The bearing adjustment seat, the upper bearing cover, the oil seal, the upper bearing spacer and the adjusting nut form a closed space.

[0007] Furthermore, the inner ring of the clamping nut is threaded, and the limiting grooves are evenly arranged on the outer ring of the clamping nut. A connecting hole 2 is arranged on the upper surface of the clamping nut, and the connecting hole 2 corresponds one-to-one with the limiting groove. A connecting hole 1 is arranged on the stop block, and the connecting hole 1 and the connecting hole 2 are fixedly connected by bolts.

[0008] Furthermore, a pressure plate is provided on the upper surface of the upper bearing cover, and the pressure plate is fixed to the upper bearing cover by bolts.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The structure is simple in design, which not only ensures the reliable sealing performance of the bearing cavity, but also prevents the up and down movement of the entire bearing structure through the stop block. Specifically, the upper bearing cover and the adjusting nut cooperate to clamp the bearing at the same time, and the adjusting nut is pressed by the clamping nut, and the clamping nut is firmly fixed by the stop block and the fixing bolt. The three clamping structures completely avoid the up and down movement of the bearing, and the enclosed space formed by a series of structures such as the oil seal and the bearing adjustment seat completely blocks the entry of dust and other impurities, protects the bearing, and extends the service life and stability of the bearing and the entire powder selection machine device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the stop block structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the compression nut of the utility model.

[0014] In the figure: 1 bearing, 2 bearing adjustment seat, 3 upper bearing cover, 4 pressure plate, 5 oil seal, 6 clamping nut, 7 stop block, 8 adjusting nut, 9 upper bearing spacer, 10 transmission shaft, 11 rectangular groove, 12 connecting hole 1, 13 limiting groove, 14 connecting hole 2. DETAILED DESCRIPTION

[0015] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply 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 understood as a limitation on the present invention.

[0016] See also Figure 1-3 The utility model provides a technical solution: a bearing sealing clamping device on a powder selection machine, comprising a transmission shaft 10, a bearing 1, an adjusting nut 8 and a clamping nut 6, the bearing 1 is installed on the transmission shaft 10, the adjusting nut 8 and the upper bearing spacer 9 are respectively installed on the transmission shaft 10 close to the upper and lower ends of the bearing 1, the adjusting nut 8 and the upper bearing spacer 9 are respectively provided with oil seals 5, a clamping nut 6 is arranged on the transmission shaft 10 on the upper side of the adjusting nut 8, the adjusting nut 8 is used to adjust the safe position of the bearing 1, and its position is fixed by the adjusting nut 8, a limiting groove 13 is arranged on the clamping nut 6, a rectangular groove 11 is arranged on the transmission shaft 10, a stop block 7 is fixed on the clamping nut 6, the two sides of the stop block 7 are respectively stuck in the limiting groove 13 and the rectangular groove 11, the clamping nut 6 is close to the adjusting nut 8, further locking the up and down movement of the bearing 1, and the stop block 7 fixes the up and down movement of the clamping nut 6, thereby ensuring that the bearing 1 does not move, ensuring the safety and stability of the structure.

[0017] The bearing adjustment seat 2 is installed on the outside of the bearing 1. The upper bearing cover 3 is fixed to the upper surface of the bearing adjustment seat 2 by bolts. The bearing adjustment seat 2, the upper bearing cover 3, the oil seal 5, the upper bearing spacer 9 and the adjusting nut 8 form a closed space. The bearing 1 is located in the closed space, thereby protecting the bearing 1 and preventing the entry of fine powder.

[0018] The inner ring of the clamping nut 6 is threaded, and the limiting grooves 13 are evenly arranged on the outer ring of the clamping nut 6. The upper surface of the clamping nut 6 is provided with a connecting hole 2 14, and the connecting hole 2 14 corresponds one to one with the limiting groove 13. The stop block 7 is provided with a connecting hole 12, and the connecting hole 12 and the connecting hole 2 14 are fixedly connected by bolts to prevent the entire bearing structure from moving up and down.

[0019] A pressure plate 4 is provided on the upper surface of the upper bearing cover 3, and the pressure plate 4 is fixed to the upper bearing cover 3 by bolts. The pressure plate 4 blocks the oil seal 5 inside the upper bearing cover 3, and serves as a first-line protective structure to prevent the oil seal 5 from accidentally detaching and reduce the entry of debris.

[0020] During installation, the two sides of the stop block 7 are clamped in the rectangular groove 11 and the limit groove 13 and fixed by bolts. The stop block 7 can effectively prevent the clamping nut 6 from rotating, and the adjusting nut is pressed by the clamping nut, completely avoiding the up and down movement of the bearing.

[0021] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which are all within the scope of the present invention to be protected.

Claims

1. A bearing seal clamping device for a powder classifier, comprising a transmission shaft (10), a bearing (1), an adjusting nut (8) and a clamping nut (6), characterized in that: The bearing (1) is mounted on a transmission shaft (10); an adjusting nut (8) and an upper bearing spacer (9) are respectively mounted on the transmission shaft (10) at upper and lower ends of the bearing (1); oil seals (5) are respectively mounted on the adjusting nut (8) and the upper bearing spacer (9); a clamping nut (6) is arranged on the transmission shaft (10) above the adjusting nut (8); a limiting groove (13) is arranged on the clamping nut (6); a rectangular groove (11) is arranged on the transmission shaft (10); a stopper (7) is fixed on the clamping nut (6); two sides of the stopper (7) are respectively clamped in the limiting groove (13) and the rectangular groove (11).

2. The seal pressing device for the upper bearing of a powder selector according to claim 1 is characterized in that: The invention also comprises a bearing adjustment seat (2), the bearing adjustment seat (2) is mounted on the outer side of the bearing (1), an upper bearing cover (3) is fixed to the upper surface of the bearing adjustment seat (2) by bolts, and the bearing adjustment seat (2), the upper bearing cover (3), the oil seal (5), the upper bearing spacer (9) and the adjusting nut (8) form a closed space.

3. The seal pressing device for the upper bearing of a powder selector according to claim 1 is characterized in that: The inner ring of the clamping nut (6) is threaded, and the limiting grooves (13) are evenly arranged on the outer ring of the clamping nut (6). The upper surface of the clamping nut (6) is provided with a second connection hole (14), and the second connection hole (14) corresponds to the limiting groove (13) one by one. The stop block (7) is provided with a first connection hole (12), and the first connection hole (12) and the second connection hole (14) are fixedly connected by bolts.

4. The seal pressing device for the upper bearing of a powder selector according to claim 1 is characterized in that: A pressure plate (4) is provided on the upper surface of the upper bearing cover (3), and the pressure plate (4) is fixed to the upper bearing cover (3) by means of bolts.

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