Thin oil lubrication sealing device for bearing of rotor shaft of crusher

Abstract

A bearing thin oil lubrication sealing device for a rotor shaft of a pulverizer comprises a rotor main shaft, a bearing, a bearing seat lower shell, a bearing seat upper shell, a bearing seat upper cover, an oil pipe joint, two oil nozzles, a left groove, a right groove, a groove, a bearing seat right gland, a bearing seat left gland, a right oil seal and a left oil seal, wherein the groove, the bearing seat right gland, the bearing seat left gland, the right oil seal and the left oil seal are arranged on the bearing seat lower shell. A bearing seat left gland and a bearing seat right gland are respectively installed on the left side and the right side of the bearing seat upper shell and the bearing seat lower shell and press two end faces of the bearing, a right groove is formed in an inner hole of the bearing seat right gland, a left groove is formed in an inner hole of the bearing seat left gland, and the positions of the right groove and the left groove respectively correspond to the positions of the left groove and the right groove. A left oil seal is installed outside an inner hole of the bearing seat left gland, and a right oil seal is installed outside an inner hole of the bearing seat right gland. The oil blocking structure and the sealing structure are relatively concentrated and compact, the structure is simple, and the manufacturing cost is low.

Description

Technical Field

[0001] The utility model relates to a thin oil lubrication sealing device, in particular to a thin oil lubrication sealing device for a rotor shaft bearing of a pulverizer. Background Art

[0002] At present, the lubricating medium of crusher bearings on the market is mostly grease lubrication. The disadvantages of grease lubrication are that it is only suitable for low-temperature environments, has large friction resistance during rotation, poor medium fluidity, uneven oil film distribution on the entire rotating contact surface of the bearing, cumbersome work to replace the grease, and cannot cool the bearing.

[0003] Related patent document: CN200943698Y discloses an oil lubrication sealing device for a pulverizer rotary shaft, which includes a bearing seat, a bearing placed in the bearing seat and supporting a rotating main shaft, a bearing cover and a pressure cover located on both sides of the bearing seat and sealed and fixed therewith in sequence; oil baffles are installed on both sides of the bearing, the oil baffles are statically matched with the bearing seat, a gap is provided between the inner hole of the oil baffle and the rotating main shaft, a through hole is provided at the bottom of the oil baffle, an oil nozzle is installed on the upper cover of the bearing seat, and the oil nozzle is adjacent to the upper part of the oil baffle; corresponding grooves are provided on the inner hole of the bearing cover and the rotating main shaft, and an oil pipe joint is installed at the bottom of the bearing cover. Each sealing device in this sealing device has two bearing covers and two oil blocking rings. Its oil blocking structure and sealing structure are relatively scattered and not compact. There are as many as six oil blocking grooves on the bearing cover, and there are six corresponding grooves on the rotating main shaft. The bearing cover has many grooves and the bearing cover is thick, which widens the width of the bearing seat. The bearing seat is wide, and the seat plate of the crusher bearing seat is also large, making the crusher equipment uncoordinated, unsightly, bulky and wasteful of materials. In addition, a felt ring seal needs to be installed between the bearing cover and the pressure cover. The felt ring has a poor sealing effect and is not suitable for use in high-speed rotating equipment. The sealing device has a relatively complex structure, many parts, high processing difficulty, and cumbersome maintenance. Summary of the invention

[0004] The utility model aims to provide a pulverizer rotor shaft bearing thin oil lubrication sealing device, the oil blocking structure and the sealing structure of which are relatively centralized and compact, simple in structure and low in manufacturing cost.

[0005] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0006] A grinder rotor shaft bearing thin oil lubrication sealing device (bearing seat), comprising a rotor main shaft, a bearing, a bearing seat lower shell, a bearing seat upper shell, a bearing seat upper cover, an oil pipe joint (oil outlet oil pipe joint), two oil spray nozzles, a left groove arranged on the rotor main shaft, a right groove arranged on the rotor main shaft and a groove arranged on the bearing seat lower shell, wherein the left groove and the right groove are respectively located on the left and right sides of the bearing, and the technical solution is that the grinder rotor shaft bearing thin oil lubrication sealing device also comprises a bearing seat right pressure cover, a bearing seat left pressure cover, a right oil seal, Left oil seal, the bearing is installed between the lower shell of the bearing seat and the upper shell of the bearing seat, the bearing supports the rotor main shaft of the crusher, the left pressure cover of the bearing seat and the right pressure cover of the bearing seat are respectively installed on the left and right sides of the upper shell of the bearing seat and the lower shell of the bearing seat and press the two end surfaces of the bearing, the inner hole of the right pressure cover of the bearing seat is provided with a right groove, and the inner hole of the left pressure cover of the bearing seat is provided with a left groove, the positions of the right groove and the left groove respectively correspond to the positions of the left groove and the right groove, a left oil seal is installed on the outer side of the inner hole of the left pressure cover of the bearing seat, and a right oil seal is installed on the outer side of the inner hole of the right pressure cover of the bearing seat.

[0007] Among the above technical solutions, a preferred technical solution may be that the number of the left groove and the number of the right groove are both two, and the shapes of the left groove and the right groove are both semicircular ring grooves.

[0008] In the utility model, the upper shell of the bearing seat and the lower shell of the bearing seat together form the main body of the bearing seat. Two oil spray nozzles are installed on the upper cover of the bearing seat. The lubricating oil is pumped by the oil pump and sprayed to the upper part of the bead of the bearing through the oil spray nozzle. As the bearing rotates, the lubricating oil forms an oil film on the contact surface of the bead and the inner and outer sleeves to play a lubricating role. As the bearing rotates and the action of gravity, the lubricating oil gathers at the bottom of the main body of the bearing seat, and is pumped back to the lubricating oil tank through the oil pipe joint (oil outlet thread head) to achieve a closed-loop lubrication cycle of thin oil lubrication. The thin oil lubrication sealing device has a lubricating medium with good flow performance and circulation performance, and is easy to replace without disassembling the bearing seat; the bearing has good lubrication performance and small friction resistance, and the circulating lubricating oil takes away the heat generated by the high-speed rotation of the crusher shaft, which cools the bearing and extends the service life of the bearing. The utility model adopts the grinder, during use, the resistance of the rotor shaft speed of the grinder is reduced, the speed is increased, the power loss is reduced, the efficiency of the grinder is improved, the circulation performance of the thin oil is good, and it is easy to replace. The oil tank filter can remove impurities, and the circulating lubricating oil has the function of cooling the bearing, thereby extending the service life of the bearing. The utility model adopts the thin oil lubrication method to lubricate the grinder bearing, overcoming the technical defect of the grinder main shaft bearing lubrication using grease lubrication.

[0009] Compared with the technical solution disclosed in CN200943698Y (oil lubrication sealing device for the main shaft of a pulverizer), the utility model has no bearing cover, and the left pressure cover 9 of the bearing seat and the right pressure cover 2 of the bearing seat are both processed with grooves (i.e., left grooves or right grooves) and oil seal (i.e., left oil seal or right oil seal) installation positions. One part has both oil blocking and sealing functions. In this way, the oil blocking structure and the sealing structure of the utility model are relatively concentrated and more compact. The utility model has a simple structure, small size, light weight, low processing difficulty, easy use and maintenance, and low manufacturing cost. After testing, compared with the relevant technology, the overall size of the utility model is reduced by more than 12%, and the manufacturing cost is reduced by more than 10%. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Figure 2 It is a structural schematic diagram of the utility model (equivalent to the right view). DETAILED DESCRIPTION

[0012] In order to make the invention purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] Example 1: Figure 1 , Figure 2As shown, the rotor shaft bearing thin oil lubrication sealing device of the pulverizer of the present invention comprises a rotor main shaft 4, a bearing 11, a bearing seat lower shell 1, a bearing seat upper shell 7, a bearing seat upper cover 8, an oil pipe joint 3, two oil injection nozzles 6, a left groove 40 provided on the rotor main shaft 4, a right groove 41 provided on the rotor main shaft 4 and a groove 12 provided on the bearing seat lower shell 1. The left groove 40 and the right groove 41 are respectively located on the left and right sides of the bearing 11, and it is characterized in that the pulverizer rotor shaft bearing thin oil lubrication sealing device also has a bearing seat right pressure cover 2, a bearing seat left pressure cover 9, a right oil seal 5, and a left oil seal 10. The bearing 11 is installed between the bearing seat lower shell 1 and the bearing seat upper shell 7. The bearing 11 supports the rotor main shaft 4 of the pulverizer. The bearing seat left pressure cover 9 and the bearing seat right pressure cover 2 are respectively installed on the left and right sides of the bearing seat upper shell 7 and the bearing seat lower shell 1 and press the two end surfaces of the bearing 11. The inner hole of the right pressure cover 2 of the bearing seat is provided with a right groove 21, and the inner hole of the left pressure cover 9 of the bearing seat is provided with a left groove 91. The positions of the right groove 21 and the left groove 91 correspond to the positions of the left groove 40 and the right groove 41 respectively. The left oil seal 10 is installed on the outer side of the inner hole of the left pressure cover 9 of the bearing seat, and the right oil seal 5 is installed on the outer side of the inner hole of the right pressure cover 2 of the bearing seat. In this way, the left pressure cover 9 of the bearing seat and the right pressure cover 2 of the bearing seat are both processed with grooves (i.e., left grooves or right grooves) and oil seal (i.e., left oil seal or right oil seal) installation positions, and one part has both oil blocking and sealing functions. In this way, the oil blocking structure and sealing structure of the utility model are relatively concentrated and more compact.

[0014] like Figure 1 , Figure 2 As shown, the bearing seat upper cover 8 is placed above the bearing 11, and two oil spray nozzles 6 are placed on the left and right sides of the bearing 11. The outlet positions of the two oil spray nozzles 6 are aligned with the upper part of the bead of the bearing 11. The bottom of the right pressure cover 2 of the bearing seat has an oil outlet, which is connected to the oil pipe joint 3. The bottom of the left groove 91 and the bottom of the right groove 21 are processed with oil outlets. The bearing seat upper shell 7 and the bearing seat lower shell 1 together form the bearing seat body, the bearing seat body supports the bearing 11, and the bearing 11 supports the rotor main shaft 4. The bearing seat upper cover 8, the two oil spray nozzles 6, the oil pipe joint 3 and the peripheral lubricating oil pump form a circulation structure of lubricating oil to complete the thin oil lubrication of the rotor shaft bearing of the pulverizer. The left groove on the inner hole of the left pressure cover of the bearing seat, the right groove on the inner hole of the right pressure cover of the bearing seat, and the corresponding left groove 40, right groove 41 on the rotor main shaft 4 and the left oil seal 10 and right oil seal 5 form a sealing structure of the bearing seat to prevent the lubricating oil from leaking outward. The number of the left groove 40 and the number of the right groove 41 are both two, and the shape of the left groove 40 and the right groove 41 are both semicircular ring grooves.

[0015] The working principle of the utility model is as follows: the lubricating oil of the rare lubrication system is pumped out by the oil pump and enters the cavity of the upper cover 8 of the bearing seat, and is sprayed to the upper parts of the left and right sides of the bearing 11 through two oil spray nozzles 6, and gathers to the lower part of the bearing seat body (composed of the upper shell 7 of the bearing seat and the lower shell 1 of the bearing seat) with the rotation of the rotor main shaft 4 and the bearing 11 of the crusher; during the oil spraying process, the lubricating oil splashed onto the inner side surface of the rotor main shaft 4 and the left pressure cover 9 of the bearing seat, and the inner side surface of the right pressure cover 2 of the bearing seat forms resistance due to the oil resistance structure formed by the right groove 21 and the right groove 41, and the oil resistance structure formed by the left groove 91 and the left groove 40, and the lubricating oil gathers to the right groove The oil flow port at the bottom of 21 and the oil flow port at the bottom of the left groove 91 flow to the bottom of the bearing seat body; the left oil seal 10 and the right oil seal 5 prevent a small amount of lubricating oil from leaking through the above-mentioned oil-blocking structure; the lubricating oil flowing to the left side of the bottom of the bearing seat body passes through the groove 12 on the bearing seat lower shell 1, and together with the lubricating oil flowing to the right side of the bottom of the bearing seat body, it is collected at the oil pipe joint 3 at the oil outlet of the right pressure cover 2 of the bearing seat, and the lubricating oil is discharged back to the lubricating oil tank through the oil pump. The oil outlet of the lubricating oil tank is provided with a filter, and the lubricating oil circulating into the bearing seat body will be filtered, and the capacity of the oil tank can ensure that the circulating lubricating oil controls the temperature rise of the bearing seat body within the specified range.

[0016] To sum up, the oil-blocking structure and sealing structure of the utility model are relatively concentrated and more compact. The utility model has a simple structure, small size, light weight, low processing difficulty, easy use and maintenance, and low manufacturing cost. After testing, compared with the relevant technology, the overall size of the utility model is reduced by more than 12%, and the manufacturing cost is reduced by more than 10%.

Claims

1. A pulverizer rotor shaft bearing thin oil lubrication sealing device, comprising a rotor main shaft (4), a bearing (11), a bearing seat lower shell (1), a bearing seat upper shell (7), a bearing seat upper cover (8), an oil pipe joint (3), two oil injection nozzles (6), a left groove (40) provided on the rotor main shaft (4), a right groove (41) provided on the rotor main shaft (4) and a groove (12) provided on the bearing seat lower shell (1), characterized in that The pulverizer rotor shaft bearing thin oil lubrication sealing device further comprises a right bearing seat pressure cover (2), a left bearing seat pressure cover (9), a right oil seal (5), and a left oil seal (10). The left bearing seat pressure cover (9) and the right bearing seat pressure cover (2) are respectively mounted on the left and right sides of the bearing seat upper shell (7) and the bearing seat lower shell (1) and press the two end surfaces of the bearing (11). The inner hole of the right bearing seat pressure cover (2) is provided with a right groove (21), and the inner hole of the left bearing seat pressure cover (9) is provided with a left groove (91). The positions of the right groove (21) and the left groove (91) correspond to the positions of the left groove (40) and the right groove (41), respectively. The left oil seal (10) is mounted on the outer side of the inner hole of the left bearing seat pressure cover (9), and the right oil seal (5) is mounted on the outer side of the inner hole of the right bearing seat pressure cover (2).

2. The grinder rotor shaft bearing thin oil lubrication sealing device according to claim 1 is characterized in that The number of the left groove (40) and the number of the right groove (41) are both two, and the shape of the left groove (40) and the right groove (41) are both semicircular ring grooves.

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