Main shaft bearing thin oil lubrication system with oil pump for overhang roll flour mill

Abstract

The invention discloses a main shaft bearing thin oil lubrication system with an oil pump for an overhang roll flour mill. A main shaft is supported by an upper bearing and a lower bearing; the upper bearing is mounted on the bearing seat, and the bearing seat and the lower bearing are mounted on the gear box; an oil pumping disc is installed on the main shaft, and a spiral groove is formed in the outer circle surface of the oil pumping disc. An axial drill hole is formed in the rotation center of the main shaft, and the depth of the axial drill hole is higher than the radial center line of the upper bearing; a transverse hole is drilled from the outer surface of the main shaft to the rotation center, one end of the transverse hole is communicated with the axial drill hole, the other end of the transverse hole faces the upper bearing, and the center line of the transverse hole is higher than the radial center line of the upper bearing; a main shaft lower end cover is arranged on the lower portion of the main shaft, an inner cavity is formed in the main shaft lower end cover, and the axial drill hole is communicated with the inner cavity; the spiral groove, the lower bearing, the inner cavity, the axial drill hole, the transverse hole and the upper bearing form a lubricating oil way. The problem of oil leakage at the upper bearing at present is solved.

Description

Technical Field

[0001] This invention belongs to the technical field of suspension roller mills, and particularly relates to a lubrication system for the main shaft bearing of a suspension roller mill. Background Technology

[0002] Suspension roller mills are widely used in metallurgy, building materials, chemical industry, mining, highway construction, water conservancy and hydropower and other industries for crushing and grinding mineral materials. The suspension roller mill mainly consists of a main unit, analyzer, powder collector, fan, and pipelines. Qualified particle size materials in the hopper are continuously fed into the main grinding chamber by a feeder for grinding. The ground powder is carried away by the airflow blown into the mill by a centrifugal fan, and then classified by the analyzer. Powder meeting the fineness requirements is carried by the airflow through the pipeline into the cyclone powder collector for separation and collection. The finished powder is discharged through the discharge valve, and the separated airflow is drawn into the centrifugal fan through the return air pipe at the top of the cyclone powder collector. Unqualified powder, after being separated by the analyzer, is thrown against the cylinder wall, falls down the cylinder wall, and returns to the mill for further grinding.

[0003] The main unit is a pulverizing device. It primarily uses a shovel to scoop up material from the liner and feed it between the grinding ring and grinding rollers. Powdering is achieved through the extrusion and grinding action between the rollers and the grinding ring. The current main unit structure is detailed in the centralized lubrication system of the suspended roller mill (application number 201320247448.4). The main shaft drives the grinding roller hanger, the grinding roller assembly is placed on the hanger, and the grinding rollers are mounted on the assembly. The shovel holder and the grinding roller hanger are bolted together. A bearing is installed between the shovel holder and the bearing housing. Lubricating oil flows through the central hole of the main shaft, an oil pipe, and then into the bearing. After use, users frequently experience oil leakage at the upper bearing, causing the equipment to malfunction. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to solve the problem of frequent oil leakage at the bearing in the prior art, and to provide a thin oil lubrication system for the main shaft bearing of a suspension roller mill with its own oil pump.

[0005] To solve the above problems, the present invention is achieved through the following technical solution: A thin oil lubrication system for the main shaft bearing of a suspended roller mill with an integrated oil pump includes a main shaft, an upper bearing at the upper part of the main shaft, and a lower bearing at the lower part of the main shaft, with the main shaft supported by the upper and lower bearings; the upper bearing is mounted on a bearing housing, and the bearing housing and the lower bearing are mounted on a gearbox, which is filled with lubricating oil; A pump oil plate is installed on the main shaft. The pump oil plate rotates with the main shaft. A spiral groove is provided on the outer circular surface of the pump oil plate. An axial bore is provided at the rotation center of the spindle, and the depth of the axial bore is higher than the radial center line of the upper bearing. A transverse hole is drilled from the outer surface of the spindle to the rotation center. One end of the transverse hole is connected to the axial bore, and the other end of the transverse hole faces the upper bearing. The center line of the transverse hole is higher than the radial center line of the upper bearing. A spindle lower end cover is provided at the lower part of the spindle, and an inner cavity is provided inside the spindle lower end cover. An axial drill hole is connected to the inner cavity. The spindle lower end cover is installed on the gearbox. The spiral groove, lower bearing, inner cavity, axial bore, transverse bore, and upper bearing constitute the lubrication oil passage.

[0006] An oil level indicator is provided on the outer surface of the gearbox.

[0007] Compared with the prior art, the present invention has the following advantages: the present invention solves the problem of oil leakage at the upper bearing; it has the advantages of low cost and stability, and can ensure the normal operation of the equipment. Attached Figure Description

[0008] Figure 1 This is a structural diagram of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle. Detailed Implementation

[0009] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0010] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0011] like Figure 1 As shown, a thin oil lubrication system for the main shaft bearing of a suspended roller mill with its own oil pump includes a main shaft 3, an upper bearing 2 is provided on the upper part of the main shaft 3, and a lower bearing 7 is provided on the lower part of the main shaft 3. The main shaft 3 is supported by the upper bearing 2 and the lower bearing 7. The upper bearing 2 is mounted on a bearing seat 1, and the bearing seat 1 and the lower bearing 7 are mounted on a gearbox 6. The gearbox 6 is filled with lubricating oil.

[0012] A pump oil plate 5 is installed on the main shaft 3. The pump oil plate 5 rotates with the main shaft 3. A spiral groove is provided on the outer circular surface of the pump oil plate 5.

[0013] The present invention provides an axial borehole 9 at the rotation center of the spindle 3, the depth of which is higher than the radial center line of the upper bearing 1; a transverse hole 10 is drilled from the outer surface of the spindle 3 to the rotation center, one end of the transverse hole 10 is connected to the axial borehole 9, the other end of the transverse hole 10 faces the upper bearing 2, and the center line of the transverse hole 10 is higher than the radial center line of the upper bearing 2.

[0014] A lower end cover 8 is provided at the lower part of the spindle 3, and an inner cavity 11 is provided inside the lower end cover 8. An axial drill hole 9 is connected to the inner cavity 11. The lower end cover 8 is installed on the gearbox 6.

[0015] In this invention, the spiral groove, the lower bearing 7, the inner cavity 11, the axial bore 9, the transverse bore 10, and the upper bearing 2 constitute the lubrication oil circuit.

[0016] Furthermore, an oil level indicator 4 is provided on the outer surface of the gearbox 6. The gearbox 6 is filled with oil up to the level of the oil level indicator 4.

[0017] The working principle of this utility model is as follows: During operation, the main shaft 3 rotates (driven by a motor, pulleys, gears, and other parts). The main shaft 3 drives the oil pump plate 5 to rotate. Under the push of the spiral groove on the oil pump plate 5, the lubricating oil flows through the lower bearing 7 and into the inner cavity 11 of the lower end cover 8. Then, it flows upward through the axial drill hole 9 of the main shaft 3 and into the ball bearing of the upper bearing 2 through the transverse hole 10 of the main shaft 3. This achieves lubrication of the upper bearing 2 and the lower bearing 7, and completes the delivery of lubricating oil.

[0018] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A spindle bearing thin oil lubrication system with an oil pump for a suspension roller mill, characterized in that: The main shaft (3) comprises an upper bearing (2) disposed on the upper part of the main shaft (3), a lower bearing (7) disposed on the lower part of the main shaft (3), and the main shaft (3) is supported by the upper bearing (2) and the lower bearing (7); the upper bearing (2) is mounted on a bearing seat (1), the bearing seat (1) and the lower bearing (7) are mounted on a gear box (6), and lubricating oil is added to the gear box (6); An oil pump pan (5) is mounted on the main shaft (3), the oil pump pan (5) rotates along with the main shaft (3), and a spiral groove is arranged on the outer circumferential surface of the oil pump pan (5); An axial bore hole (9) is provided at the rotation center of the main shaft (3), and the depth of the axial bore hole (9) is higher than the radial center line of the upper bearing (1); a transverse hole (10) is drilled from the outer surface of the main shaft (3) toward the rotation center, one end of the transverse hole (10) is mutually connected with the axial bore hole (9), and the other end of the transverse hole (10) faces the upper bearing (2), and the center line of the transverse hole (10) is higher than the radial center line of the upper bearing (2); A main shaft lower end cover (8) is provided at the lower part of the main shaft (3), and an inner chamber (11) is provided in the main shaft lower end cover (8), the axial bore (9) is connected to the inner chamber (11), and the main shaft lower end cover (8) is mounted on the gear box (6); The spiral groove, the lower bearing (7), the inner chamber (11), the axial bore (9), the transverse hole (10) and the upper bearing (2) constitute a lubricating oil circuit.

2. The spindle bearing thin oil lubrication system with its own oil pump for a suspension roller mill according to claim 1, characterized in that: An oil mark (4) is provided on the outer surface of the gear box (6).

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