Low-rolling-resistance energy-saving efficient sealed ball bearing

Abstract

The utility model provides a low-rolling-resistance energy-saving efficient sealed ball bearing which comprises an inner ring, an outer ring and a sealing ring arranged between the inner ring and the outer ring, wherein the inner ring and the outer ring are arranged in a ring sleeving manner; an outer ring sealing groove is formed in the inner side of the outer ring, an inner ring sealing groove is formed in the outer side of the inner ring, the outer periphery of the sealing ring is in close fit with the outer ring sealing groove, a sealing lip in sliding fit with the inner ring sealing groove is arranged on the inner periphery of the sealing ring, and the contact face of the inner lip of the sealing ring is coated with a low-friction wear-resistant coating. The friction torque during the operation of the bearing is effectively reduced; radial exhaust holes are formed in the outer peripheral edge of the sealing ring in the radial direction, axial exhaust holes are formed in the outer peripheral wall of the sealing ring in the axial direction, the radial exhaust holes and the axial exhaust holes form an exhaust channel, air in the sealing ring can be exhausted, the radial exhaust holes and the axial exhaust holes are distributed in a 45-degree mode, it can be guaranteed that the exhaust channel is smooth, and the sealing performance of the sealing ring is improved. And the friction torque caused by air pressure in the bearing at high temperature is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, and particularly relates to a low rolling resistance, energy-saving and high-efficiency sealed ball bearing. Background Art

[0002] Bearings are one of the most basic and important parts of mechanical rotating structures. A rolling support system consisting of a cage, balls and lubricating grease is generally set between the inner and outer rings of the bearing to reduce friction and maintain rotation stability. Friction inside the bearing is a kind of useless workmanship, but it cannot be eliminated. Reducing the friction torque of the bearing has always been one of the development directions of the industry.

[0003] High-efficiency motors, reducers and other transmission systems require high transmission efficiency and low energy consumption. Ordinary ball bearings cannot meet the application requirements due to their large friction resistance. Moreover, when the bearing is working in a high-temperature environment, the internal lubricating oil or air may expand due to heat, resulting in an increase in internal air pressure. The sealing ring will expand under greater pressure, increasing the friction between the sealing ring and the inner ring, thereby increasing the friction torque and affecting the transmission efficiency of rotating systems such as motors. Therefore, the present application provides a sealed ball bearing with low rolling resistance, which effectively reduces the friction torque of the bearing during operation and the increased friction torque caused by the internal air pressure of the bearing under high-temperature applications. Utility Model Content

[0004] The utility model aims to provide a low rolling resistance, energy-saving and high-efficiency sealed ball bearing, which can effectively reduce the friction torque during the operation of the bearing and the increased friction torque caused by the internal air pressure of the bearing under high temperature application.

[0005] To achieve the above-mentioned purpose, the solution of the utility model is: a low rolling resistance, energy-saving and high-efficiency sealed ball bearing, comprising an inner ring and an outer ring arranged in a ring sleeve, and a sealing ring arranged between the inner ring and the outer ring; an outer ring sealing groove is provided on the inner side of the outer ring, an inner ring sealing groove is provided on the outer side of the inner ring, the outer peripheral edge of the sealing ring is tightly matched with the outer ring sealing groove, and the inner peripheral edge of the sealing ring is provided with a sealing lip that slides with the inner ring sealing groove; radial exhaust holes are radially opened on the outer peripheral edge of the sealing ring, and axial exhaust holes are opened in the axial direction on the outer peripheral wall of the sealing ring, and the radial exhaust holes and the axial exhaust holes are distributed at 45 degrees.

[0006] Furthermore, the radial exhaust hole is arranged on the inner side surface where the outer periphery of the sealing ring cooperates with the outer ring sealing groove.

[0007] Furthermore, a cavity is provided between the outer periphery of the sealing ring and the outer ring sealing groove, and the radial exhaust holes and the axial exhaust holes are both connected to the cavity.

[0008] Furthermore, a low-friction and wear-resistant coating is provided on the lip surface of the sealing lip.

[0009] Furthermore, the low-friction and wear-resistant coating is a PTFE coating.

[0010] Furthermore, the groove curvature coefficient of the inner ring groove of the inner ring is 0.51, and the groove curvature coefficient of the outer ring groove of the outer ring is 0.53.

[0011] Furthermore, the surface roughness of the inner ring sealing groove is less than Ra0.8.

[0012] Furthermore, a retaining frame is provided between the inner ring and the outer ring, rollers are provided inside the retaining frame, and the sealing rings are provided on both sides of the retaining frame.

[0013] Furthermore, the lip opening of the sealing lip is designed to be in a "V" shape.

[0014] After adopting the above scheme, the beneficial effects of the utility model are:

[0015] The utility model provides a special exhaust structure on the sealing ring, specifically, radial exhaust holes are radially opened on the outer peripheral edge of the sealing ring, the radial exhaust holes can connect the interior of the sealing ring with the outer peripheral wall, the outer peripheral wall of the sealing ring is axially opened with axial exhaust holes, the axial exhaust holes can connect the outer peripheral wall of the sealing ring with the outside, so that the radial exhaust holes and the axial exhaust holes form an exhaust channel, which can discharge the air inside the sealing ring, and the radial exhaust holes and the axial exhaust holes are distributed at 45 degrees, which can ensure that the exhaust channel is smooth, and effectively reduce the friction torque caused by the internal air pressure of the bearing under high temperature.

[0016] In addition, the utility model also arranges a low-friction and wear-resistant coating on the lip surface of the sealing lip. The low-friction and wear-resistant coating can be a PTFE coating, which has an extremely low friction coefficient and a significant drag reduction effect, and can effectively reduce the friction torque during bearing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial cross-sectional view of the bearing of the utility model;

[0018] Figure 2 for Figure 1 A partial enlarged view

[0019] Figure 3 It is a side view of the sealing ring of the utility model;

[0020] Figure 4 It is a partial cross-sectional view of the outer ring and inner ring of the bearing of the utility model;

[0021] Figure 5 It is a partial cross-sectional view of the inner ring of the utility model;

[0022] Figure 6 It is a cross-sectional view of the sealing ring of the utility model.

[0023] Description of labels:

[0024] 1. Inner ring; 11. Inner ring sealing groove; 12. Inner ring channel; 2. Outer ring; 21. Outer ring sealing groove; 22. Outer ring channel; 3. Sealing ring; 31. Sealing lip; 32. Radial exhaust hole; 33. Axial exhaust hole; 4. Cage; 5. Roller; 6. Cavity. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1-6 As shown, the utility model provides a low rolling resistance, energy-saving and high-efficiency sealed ball bearing, including an inner ring 1 and an outer ring 2 arranged in a ring sleeve, a sealing ring 3, a retaining frame 4 and a roller 5. The outer ring 2 is sleeved on the outside of the inner ring 1, and the retaining frame 4 is arranged between the inner ring 1 and the outer ring 2. The roller 5 is arranged in the retaining frame 4, and the sealing ring 3 is arranged between the inner ring 1 and the outer ring 2 and is located on both sides of the retaining frame 4. This is the existing structure of the bearing and will not be repeated here.

[0027] The inner side of the outer ring 2 is provided with an outer ring sealing groove 21, the outer side of the inner ring 1 is provided with an inner ring sealing groove 11, the outer periphery of the sealing ring 3 is tightly matched with the outer ring sealing groove 21, and the inner periphery of the sealing ring 3 is provided with a sealing lip 31 that slides with the inner ring sealing groove 11. The sealing ring 3 slides relative to the inner ring sealing groove 11, so it is necessary to reduce the sliding between the sealing lip 31 and the inner ring sealing groove 11. For this purpose, the surface roughness of the inner ring sealing groove 11 can be set to less than Ra0.8, which can effectively reduce the sealing friction resistance. In addition, a low-friction wear-resistant coating can be added to the lip surface of the sealing lip 31 contacting the inner ring sealing groove 11 to reduce the friction coefficient and reduce the friction resistance. Preferably, the low-friction wear-resistant coating can be a PTFE coating (polytetrafluoroethylene coating), which has an extremely low friction coefficient and a significant drag reduction effect.

[0028] And, focus on Figure 4 The groove curvature coefficient of the inner ring groove 12 of the inner ring 1 is 0.51, and the groove curvature coefficient of the outer ring groove 22 of the outer ring 2 is 0.53. Under the premise of meeting the load-bearing requirements, the contact area between the roller 5 and the raceway can be reduced, thereby effectively reducing the rolling friction resistance.

[0029] Key References Figure 6 The lip opening of the sealing lip 31 is designed to be in a "V" shape, so that the sealing lip 31 is tightly fitted on the inner ring sealing groove 11, achieving an ideal sealing effect, and having friction resistance, and can be applied to ultra-high-speed rotation conditions, with a long service life.

[0030] Key References Figure 3The outer periphery of the sealing ring 3 is provided with radial exhaust holes 32, and the outer peripheral wall of the sealing ring 3 is provided with axial exhaust holes 33 in the axial direction. The axial exhaust holes 33 and the radial exhaust holes 32 cooperate to form an exhaust channel to discharge the gas inside the sealing ring 3, reduce the internal air pressure of the sealing ring 3, and thus effectively reduce the friction torque caused by the internal air pressure of the bearing under high temperature. The radial exhaust holes 32 and the axial exhaust holes 33 are distributed at 45 degrees to ensure smooth exhaust channels, even when the bearing is working, that is, when the outer ring 2 rotates relative to the inner ring 1, the exhaust can be kept smooth.

[0031] Specifically, the radial exhaust hole 32 is preferably arranged on the inner side surface where the outer peripheral edge of the sealing ring 3 cooperates with the outer ring sealing groove 21. Figure 2 The outer peripheral edge of the sealing ring 3 is an obtuse angle, and the outer ring sealing groove 21 and the obtuse angle cooperate to form a right angle surface, so that a cavity 6 is provided between the outer peripheral edge of the sealing ring 3 and the outer ring sealing groove 21, and the radial exhaust hole 32 and the axial exhaust hole 33 are both connected with the cavity 6, so that the radial exhaust hole 32 can connect the inner and outer peripheral walls of the sealing ring 3, and the axial exhaust hole 33 can connect the outer peripheral wall of the sealing ring 3 with the outside, thereby connecting the radial exhaust hole 32 and the axial exhaust hole 33 to form an exhaust channel, which can pinch out the gas inside the sealing ring 3, reduce the internal air pressure of the sealing ring 3, and solve the problem of increased friction torque caused by increased internal air pressure of the sealing ring 3 under high temperature.

[0032] The above description is only a preferred embodiment of the present utility model and is not a limitation on the design of the present case. Any equivalent changes made based on the key design of the present case shall fall within the protection scope of the present case.

Claims

1. A low rolling resistance, energy-saving and high-efficiency sealed ball bearing, characterized by: It comprises an inner ring and an outer ring arranged in a ring sleeve, and a sealing ring arranged between the inner ring and the outer ring; an outer ring sealing groove is arranged on the inner side of the outer ring, an inner ring sealing groove is arranged on the outer side of the inner ring, the outer peripheral edge of the sealing ring is tightly matched with the outer ring sealing groove, and the inner peripheral edge of the sealing ring is provided with a sealing lip which is slidably matched with the inner ring sealing groove; radial exhaust holes are radially arranged on the outer peripheral edge of the sealing ring, and axial exhaust holes are axially arranged on the outer peripheral wall of the sealing ring, and the radial exhaust holes and the axial exhaust holes are distributed at 45 degrees.

2. A low rolling resistance, energy-saving and high-efficiency sealed ball bearing as claimed in claim 1, characterized in that: The radial exhaust hole is arranged on the inner side surface where the outer peripheral edge of the sealing ring cooperates with the outer ring sealing groove.

3. A low rolling resistance, energy-saving and high-efficiency sealed ball bearing as claimed in claim 1 or 2, characterized in that: A cavity is provided between the outer periphery of the sealing ring and the outer ring sealing groove, and the radial exhaust hole and the axial exhaust hole are both connected to the cavity.

4. A low rolling resistance, energy-saving and high-efficiency sealed ball bearing as claimed in claim 1, characterized in that: The lip surface of the sealing lip is provided with a low-friction and wear-resistant coating.

5. A low rolling resistance, energy-saving and high-efficiency sealed ball bearing as claimed in claim 4, characterized in that: The low-friction and wear-resistant coating is a PTFE coating.

6. A low rolling resistance, energy-saving and high-efficiency sealed ball bearing as claimed in claim 1, characterized in that: The groove curvature coefficient of the inner ring groove of the inner ring is 0.51, and the groove curvature coefficient of the outer ring groove of the outer ring is 0.

53.

7. A low rolling resistance, energy-saving and high-efficiency sealed ball bearing as claimed in claim 1, characterized in that: The surface roughness of the inner ring sealing groove is less than Ra0.

8.

8. The low rolling resistance, energy-saving and high-efficiency sealed ball bearing according to claim 1, characterized in that: A retaining frame is arranged between the inner ring and the outer ring, rollers are arranged inside the retaining frame, and the sealing rings are arranged on both sides of the retaining frame.

9. The low rolling resistance, energy-saving and high-efficiency sealed ball bearing according to claim 1, characterized in that: The lip opening of the sealing lip is designed to be in a "V" shape.

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