High-speed rotating oil supply bearing lock nut and oil supply system

Abstract

The invention discloses a high-speed rotating oil supply bearing lock nut and an oil supply system. The high-speed rotating oil supply bearing lock nut comprises an extrusion step, a horn groove and a notch. According to the high-speed rotating oil supply bearing lock nut and the oil supply system, a shaft penetrating hole is formed in the middle of a bearing lock nut body, an internal thread part is arranged at the top of the shaft penetrating hole, a cutter groove is formed below the internal thread part, an extrusion step is arranged at the bottom of the shaft penetrating hole, a horn groove is formed in the bottom face of the bearing lock nut body, and a notch is formed in the circumference of the extrusion step; the bearing lock nut is mainly used for a bearing rotating at a high speed, it is guaranteed that stable lubricating oil can be continuously supplied to the bearing, a horn mouth type structure is mainly adopted, oil is forcibly supplied to a bearing rolling body in a directional mode, and the bearing rolling body is prevented from being damaged. And the continuous lubrication of the rolling body is ensured, the phenomenon of dry grinding of the cymbal caused by oil cut-off is avoided, the normal use of the molecular pump is ensured, and the device is also suitable for supplying continuous lubricating oil to other high-speed running equipment.

Description

Technical Field

[0001] The invention relates to the technical field of molecular pump oil supply, in particular to a high-speed rotating oil supply bearing lock nut and an oil supply system. Background Art

[0002] The molecular pump rotates at a very high speed, and the oil-lubricated one can reach nearly 50,000 revolutions per minute. The linear speed of a rotor with a large diameter can reach 800 meters per second, which is supersonic. This places very high demands on the bearings. The stability, precision and life requirements of the bearings are much higher than those of other equipment. Especially in supersonic conditions, whether a stable and continuous oil film can be formed on the rolling elements is a crucial factor, including machine tools and other shaft equipment with high-speed oil supply.

[0003] Although the existing molecular pump's oil supply system can throw the lubricating oil to the bearing through the rotating shaft for lubrication, it cannot force the directional oil supply to the bearing rolling element, resulting in poor lubrication effect of the bearing. Therefore, we propose a high-speed rotating oil supply bearing lock nut and oil supply system, which can ensure that the high-speed running bearing can continuously supply stable lubricating oil, ensure that the rolling element is continuously lubricated without the phenomenon of oil shortage and dry grinding, thereby ensuring the normal use of the molecular pump. Summary of the invention

[0004] The object of the present invention is to provide a high-speed rotating oil supply bearing lock nut and an oil supply system to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high-speed rotating oil-supply bearing lock nut comprises a bearing lock nut body, a shaft through hole is provided in the middle of the bearing lock nut body, an internal thread portion is provided at the top of the shaft through hole, a cutting knife groove is provided below the internal thread portion, an extrusion step is provided at the bottom of the shaft through hole, a trumpet groove is provided on the bottom surface of the bearing lock nut body, a notch is provided on the circumference of the extrusion step, the notch is connected to the trumpet groove, and four tapered holes are provided on the circumference of the end surface of the bearing lock nut body.

[0007] As a further solution of the present invention: the overall outer diameter of the bearing lock nut body is 47 mm, and the thickness of the bearing lock nut body is 13 mm.

[0008] As a further solution of the present invention: the diameter of the through-shaft hole is 26.5 mm.

[0009] As a further solution of the present invention: the internal thread portion is an M25 thread, and the thread depth is 4 mm.

[0010] As a further solution of the present invention: the outer edge of the horn groove is 0.5 mm lower than the bottom surface of the extrusion step.

[0011] As a further solution of the present invention: an oil supply system for a high-speed rotating oil-supply bearing lock nut, also includes a closed shell, a rotating shaft is provided in the closed shell, a first bearing is sleeved on the top of the rotating shaft, a second bearing is sleeved on the bottom of the rotating shaft, an oil pool is provided at the bottom of the closed shell, an inner cavity is provided in the rotating shaft, an oil supply cone is installed at the bottom end of the rotating shaft, the oil supply cone is inserted into the oil pool, a first oil outlet hole is opened at the rotating shaft corresponding to the second bearing, an external threaded portion is provided at the top of the rotating shaft, a main body of the bearing lock nut is threadedly installed on the external threaded portion, a second oil outlet hole is provided at the corresponding notch on the rotating shaft, the extrusion step is extruded on the inner ring of the first bearing, and the outer edge of the horn groove corresponds to the outer ring of the first bearing.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention is mainly aimed at high-speed bearings to ensure that they can continuously supply stable lubricating oil. It mainly adopts a bell-mouth structure to force directional oil supply to the bearing rolling elements to ensure continuous lubrication of the rolling elements without the phenomenon of oil shortage and dry grinding, thereby ensuring the normal use of the molecular pump. This patent is also applicable to other high-speed equipment to supply continuous lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model discloses a high-speed rotating oil supply bearing lock nut and a cross-sectional view of the main body of the bearing lock nut in the oil supply system.

[0015] Figure 2 The utility model discloses a high-speed rotating oil supply bearing lock nut and an oil supply system diagram in the oil supply system.

[0016] In the figure: 1. bearing lock nut body; 2. shaft hole; 3. internal threaded portion; 4. cutting knife groove; 5. extrusion step; 6. horn groove; 7. notch; 8. four tapered holes; 9. closed housing; 10. rotating shaft; 11. first bearing; 12. second bearing; 13. oil pool; 14. inner cavity; 15. oil supply cone; 16. first oil outlet hole; 17. external threaded portion; 18. second oil outlet hole. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1In an embodiment of the present invention, a high-speed rotating oil supply bearing lock nut comprises a bearing lock nut body (1), a through-shaft hole (2) is provided in the middle of the bearing lock nut body (1), the through-shaft hole 2 is used for the shaft to pass through the bearing lock nut body 1, an internal threaded portion (3) is provided at the top of the through-shaft hole (2), the internal threaded portion 3 is used to cooperate with the external threaded portion 17, so that the bearing lock nut body 1 is installed on the shaft 10 to fix the first bearing 11, a cutting groove (4) is provided below the internal threaded portion (3), an extrusion step (5) is provided at the bottom of the through-shaft hole (2), the extrusion step 5 is used to squeeze the inner ring of the first bearing 11 to form a fixing effect, a trumpet groove (6) is provided on the bottom surface of the bearing lock nut body (1), so as to facilitate the deflection of the oil in the trumpet groove 6 and force the oil supply to the first bearing in a directional manner, a notch (7) is provided on the circumference of the extrusion step (5), the notch (7) is connected to the trumpet groove (6), and four tapered holes (8) are provided on the circumference of the end surface of the bearing lock nut body (1). The overall outer diameter of the bearing lock nut body (1) is 47 mm, and the thickness of the bearing lock nut body (1) is 13 mm. The diameter of the through-shaft hole (2) is 26.5 mm. The internal threaded portion (3) is an M25 thread, and the thread depth is 4 mm. The outer edge of the horn groove (6) is 0.5 mm lower than the bottom surface of the extrusion step (5), so as to prevent the edge of the horn groove 6 from pressing on the outer ring of the first bearing 11 to form friction and increase the friction.

[0019] See also Figure 2 The invention discloses an oil supply system for a high-speed rotating oil supply bearing lock nut, comprising a closed housing (9), a rotating shaft (10) arranged in the closed housing (9), a first bearing (11) sleeved on the top of the rotating shaft (10), a second bearing (12) sleeved on the bottom of the rotating shaft (10), an oil pool (13) arranged at the bottom of the closed housing (9), an inner cavity (14) arranged in the rotating shaft (10), an oil supply cone (15) installed at the bottom end of the rotating shaft (10), and the oil supply cone (15) inserted into the oil supply cone (15) In the pool (13), a first oil outlet hole (16) is provided on the rotating shaft (10) corresponding to the second bearing (12), an external threaded portion (17) is provided on the top of the rotating shaft (10), a bearing lock nut body (1) is threadedly mounted on the external threaded portion (17), a second oil outlet hole (18) is provided on the rotating shaft (10) corresponding to the notch (7), the extrusion step (5) is extruded on the inner ring of the first bearing (11), and the outer edge of the horn groove (6) corresponds to the outer ring of the first bearing (11).

[0020] The oil supply path is that the oil is sucked into the cavity 14 of the rotating shaft 10 by the rotating oil supply cone in the oil pool 13, and then thrown out from the first oil outlet hole 16 and the second oil outlet hole 18 during the rotation of the rotating shaft 10. The lubricating oil thrown out from the first oil outlet hole 16 falls on the second bearing 12 to lubricate the second bearing 12, so that the oil thrown out from the second oil outlet hole 18 enters the trumpet groove 6 through the notch 7, and is forced to be directional supplied to the bearing rolling elements of the first bearing 11 through the trumpet groove 6. The oil after lubricating the first bearing 11 and the second bearing 12 falls in the closed housing 9, thereby forming a reflux and being reused.

[0021] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed rotating oil supply bearing lock nut, comprising a bearing lock nut body (1), characterized in that: The middle part of the bearing lock nut body (1) is provided with an axial through hole (2), the top of the axial through hole (2) is provided with an internal threaded portion (3), a cutting groove (4) is provided below the internal threaded portion (3), an extrusion step (5) is provided at the bottom of the axial through hole (2), a trumpet groove (6) is provided on the bottom surface of the bearing lock nut body (1), a notch (7) is provided on the circumference of the extrusion step (5), the notch (7) is connected to the trumpet groove (6), and four tapered holes (8) are provided on the circumference of the end surface of the bearing lock nut body (1).

2. The high-speed rotating oil supply bearing lock nut according to claim 1 is characterized in that: The overall outer diameter of the bearing lock nut body (1) is 47 mm, and the thickness of the bearing lock nut body (1) is 13 mm.

3. The high-speed rotating oil supply bearing lock nut according to claim 1, characterized in that: The diameter of the through-axis hole (2) is 26.5 mm.

4. The high-speed rotating oil supply bearing lock nut according to claim 1, characterized in that: The internal thread part (3) is an M25 thread, and the thread depth is 4 mm.

5. The high-speed rotating oil supply bearing lock nut according to claim 1, characterized in that: The outer edge of the horn groove (6) is 0.5 mm lower than the bottom surface of the extrusion step (5).

6. An oil supply system having a high-speed rotating oil supply bearing lock nut as claimed in any one of claims 1 to 5, characterized in that: The invention also comprises a closed shell (9), wherein a rotating shaft (10) is arranged in the closed shell (9), a first bearing (11) is sleeved on the top of the rotating shaft (10), a second bearing (12) is sleeved on the bottom of the rotating shaft (10), an oil pool (13) is arranged at the bottom of the closed shell (9), an inner cavity (14) is arranged in the rotating shaft (10), an oil supply cone (15) is installed at the bottom end of the rotating shaft (10), the oil supply cone (15) is inserted into the oil pool (13), a first oil outlet hole (16) is opened at a position of the rotating shaft (10) corresponding to the second bearing (12), an external threaded portion (17) is arranged at the top of the rotating shaft (10), a bearing lock nut body (1) is threadedly mounted on the external threaded portion (17), a second oil outlet hole (18) is arranged at a position of the rotating shaft (10) corresponding to the notch (7), an extrusion step (5) is extruded on the inner ring of the first bearing (11), and an outer edge of the horn groove (6) corresponds to the outer ring of the first bearing (11).

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