Rolling bearing adopting gyro type rolling body

Abstract

The invention discloses a rolling bearing adopting a gyro type rolling body, and relates to the technical field of bearings. The invention aims to solve the problems that an existing bearing is limited in load bearing capacity and difficult to stably work for a long time in a large-load working environment in a space with the same size. The rolling bearing comprises an outer ring, an inner ring and a plurality of rolling bodies, the inner ring is coaxially arranged on the inner side of the outer ring, an outer groove is formed in the middle of the inner circumferential side wall of the outer ring in the circumferential direction, an inner groove is formed in the middle of the outer circumferential side wall of the inner ring in the circumferential direction, and the rolling bodies are evenly distributed and embedded between the outer groove and the inner groove in the circumferential direction. The rolling body is in a top shape, and the side wall of the rolling body is matched with the groove walls of the outer groove and the inner groove. The invention is used for the large-load shafting.

Description

Technical Field

[0001] The invention relates to the technical field of bearings, and in particular to a rolling bearing using a gyroscopic rolling element. Background Art

[0002] Bearings used in aero engines, gas turbines and other fields usually need to withstand complex and variable axial and radial combined loads. They are usually installed on rotating shafts, load-bearing casings, etc. Due to the complex installation environment, there is misalignment torque, and the high-temperature working environment also puts forward high requirements for bearing lubrication. At present, the bearing structure is mainly deep groove ball bearings, angular contact ball bearings, and cylindrical roller bearings. Deep groove ball bearings may fail due to elliptical truncation under conditions of excessive axial force. Angular contact ball bearings may fail due to three-point contact under conditions of excessive radial force. Cylindrical roller bearings can only withstand a single radial load. At present, the three types of bearings use machined solid cages to ensure stable operation, and the lubrication method usually adopts side injection or under-ring lubrication. The machined solid cage reduces the oil intake of the side injection, and the lubrication efficiency is limited. Under-ring lubrication requires the installation shaft to be equipped with an under-ring oil supply structure, which undoubtedly increases the complexity of the system structure.

[0003] The present invention designs a new type of rolling element for rolling bearings from the perspective of structural improvement to meet this demand. Through the present invention, it is also possible to replace the functional requirements of some other bearing structures. Summary of the invention

[0004] In order to solve the problem that existing bearings have limited load bearing capacity in a space of the same size and are difficult to work stably for a long time under a large load working environment, the present invention further proposes a rolling bearing using a gyroscopic rolling element.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A rolling bearing using gyro-type rolling elements comprises an outer ring, an inner ring and a plurality of rolling elements, wherein the inner ring is coaxially arranged on the inner side of the outer ring, an outer groove is provided in the middle of the inner circumferential side wall of the outer ring along the circumferential direction, an inner groove is provided in the middle of the outer circumferential side wall of the inner ring along the circumferential direction, a plurality of rolling elements are evenly distributed and embedded between the outer groove and the inner groove along the circumferential direction, the rolling element is gyro-shaped, and the side wall of the rolling element matches the groove wall of the outer groove and the inner groove.

[0007] Furthermore, the two sides of the rolling body are symmetrically arranged in a cone shape, and the shapes of the outer groove and the inner groove are both cone-shaped.

[0008] Furthermore, the conical side walls on both sides of the rolling body are concave arc surfaces, and the conical groove walls of the outer groove and the inner groove are both concave arc surfaces.

[0009] Furthermore, the arc curvature of the arc surface groove wall of the outer groove and the inner groove is smaller than the arc curvature of the arc surface groove wall of the rolling body.

[0010] Furthermore, the bottoms of the outer groove and the inner groove are both arc-shaped.

[0011] Furthermore, the distance from the bottom of the outer groove to the outer diameter of the outer ring is less than half of the thickness of the outer ring.

[0012] Furthermore, an oil channel is provided inside the rolling body, and an oil outlet end of the oil channel is connected with the inside of the outer groove and the inner groove.

[0013] Furthermore, the oil passage includes an oil filling hole, an oil storage cavity and a plurality of oil outlet holes. An oil storage cavity is opened in the middle of the rolling body, and oil filling holes are respectively opened in the middle of the end faces of both sides of the rolling body along the axial direction. The outer end of the oil filling hole is connected to the outside of the rolling body, and the inner end of the oil filling hole is connected to the oil storage cavity. A plurality of oil outlet holes are evenly distributed along the circumferential direction on the outer edge of the middle part of the rolling body, and each oil outlet hole is respectively arranged in the radial direction, the inner end of the oil outlet hole is connected to the oil storage cavity, and the outer end of the oil outlet hole is respectively connected to the bottom of the outer groove and the inner groove.

[0014] Furthermore, a silver-plated layer is provided on the outer edge of the middle portion of the rolling element.

[0015] Furthermore, the inner ring includes two semi-inner rings arranged opposite to each other in the axial direction, and the semi-inner rings are respectively arranged on both sides of the rolling body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The arc design of the inner and outer ring working surfaces of the bearing increases the contact area of ​​the bearing working surface, thereby reducing the contact stress on the material surface to improve the bearing load capacity and achieve targeted design based on actual working conditions;

[0018] (2) The symmetrical gyroscopic structure of the rolling element and the arc-shaped contact area design improve the stability of the bearing operation and realize the adaptive self-aligning function. At the same time, it allows the maximum deflection of the ring, thereby improving the bearing's ability to withstand axial and radial combined loads and complex combined loads caused by installation deflection;

[0019] (3) The symmetrical gyroscopic structure of the rolling element effectively avoids bearing failure caused by rolling element climbing or three-point contact;

[0020] (4) The rolling element cavity is designed with a straight hole on the outside. The lubricating oil injected laterally flows to the bottom of the groove through the internal cavity and the oil hole. The lubricating oil circulates through the self-lubrication of the rolling element, achieving high-efficiency lubrication;

[0021] (5) The gyro-shaped rolling element has no cage and adopts a full-fill design, which greatly improves the lubrication efficiency.

[0022] (6) The self-lubricating ability of the gyro-shaped rolling element is improved by silver plating the outer edge of the rolling element. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view schematic diagram of the overall structure of the present invention;

[0024] Figure 2 yes Figure 1 Schematic diagram of the HH structure;

[0025] Figure 3 is a cross-sectional schematic diagram of the outer ring in the present invention;

[0026] Figure 4 is a cross-sectional schematic diagram of a half inner ring in the present invention;

[0027] Figure 5 is a cross-sectional schematic diagram of a rolling body in the present invention;

[0028] Figure 6 yes Figure 5 Schematic diagram of the EE structure. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] Specific implementation method 1: Combination Figures 1 to 6 To illustrate this embodiment, a rolling bearing using gyro-type rolling elements described in this embodiment includes an outer ring 1, an inner ring 2 and a plurality of rolling elements 3. The inner ring 2 is coaxially arranged on the inner side of the outer ring 1. An outer groove 11 is opened in the middle part of the inner circumferential side wall of the outer ring 1 along the circumferential direction. An inner groove 21 is opened in the middle part of the outer circumferential side wall of the inner ring 2 along the circumferential direction. A plurality of rolling elements 3 are evenly distributed and embedded between the outer groove 11 and the inner groove 21 along the circumferential direction. The rolling element 3 is gyro-shaped, and the side wall of the rolling element 3 matches the groove wall of the outer groove 11 and the inner groove 21.

[0031] The present invention is based on the overall improvement of the comprehensive technical indicators of the bearing. Through the improvement of the rolling element and ring structure, a bearing structure using special rolling elements is designed to optimize the bearing load and lubrication structure of the rolling bearing to meet the needs of stable operation of the bearing under heavy load conditions. The ball bearing is designed for heavy load conditions of the bearing and has lubrication and axial compression conditions, so as to provide a high-performance and highly reliable bearing support product for this field.

[0032] The bearing is a ball bearing structure, and the outer ring adopts an integral structure.

[0033] The preferred material for bearings is high-quality bearing steel in order to meet the requirements of large loads.

[0034] The bearing material needs to be able to meet the requirements of high-temperature use. If necessary, the material should be subjected to high-temperature tempering treatment to adapt to the impact of temperature differences under large loads on the dimensional stability of the bearing.

[0035] This bearing needs to carry out ion implantation on the surface of the raceway groove of the inner ring and the outer ring to enhance the lubrication characteristics between the rolling element and the raceway groove. The particles to be implanted should be made of soft metal materials such as silver and copper, and the environmental pollution should be avoided.

[0036] Specific implementation method 2: Combination Figures 1 to 6 To explain this embodiment, the rolling element 3 described in this embodiment has two sides symmetrically arranged in a cone shape, and the outer groove 11 and the inner groove 21 are both in a cone shape.

[0037] The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0038] Specific implementation method three: Combination Figures 1 to 6 To explain this embodiment, the conical side walls of the rolling element 3 on both sides of this embodiment are concave arc surfaces, and the conical groove walls of the outer groove 11 and the inner groove 21 are both concave arc surfaces.

[0039] The undisclosed technical features in this embodiment are the same as those in the second embodiment.

[0040] The rolling element is a symmetrical gyro structure, and the working surfaces on both sides are designed with symmetrical arcs. The arc-shaped contact area design improves the stability of the bearing operation and realizes the adaptive self-aligning function. At the same time, it allows the ring to deflect to the maximum extent, which increases the bearing's axial and radial combined loads and the complex combined load caused by the installation deflection. The arc curvature and the coordinates of the curvature center can be adjusted according to the actual working load. The distance from the center of curvature to the center of the rolling element is called the arc center distance. Larger curvature and arc center distance can improve the overall bearing load capacity, smaller curvature and arc center distance can improve the bearing's self-aligning ability and increase the bearing's anti-misalignment ability. The bearing's rotating axis allows a certain degree of deflection; the ratio of the horizontal and vertical coordinates of the curvature center can be adjusted according to the size of the axial and radial loads. A higher horizontal coordinate can improve the axial load capacity, and a higher vertical coordinate can improve the radial load capacity of the bearing.

[0041] Specific implementation method four: Combination Figures 1 to 6 To explain this embodiment, the arc curvature of the arc surface groove wall of the outer groove 11 and the inner groove 21 described in this embodiment is smaller than the arc curvature of the arc surface groove wall of the rolling body 3 .

[0042] The undisclosed technical features in this embodiment are the same as those in the third embodiment.

[0043] The working surfaces of the inner and outer rings are designed as arcs, and the curvature of the arc is slightly smaller than the curvature of the rolling element, which increases the contact area of ​​the bearing working surface and reduces the contact stress on the material surface to achieve an increase in the bearing's load-bearing capacity. The horizontal and vertical coordinate positions of the curvature center are determined based on the actual axial and radial load ratios borne by the bearing, and targeted design is carried out in combination with actual working conditions.

[0044] Specific implementation method five: Combination Figures 1 to 6 The present embodiment is described. In the present embodiment, the groove bottoms of the outer groove 11 and the inner groove 21 are both arc-shaped.

[0045] The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0046] The outer ring groove bottom is connected by an arc to avoid stress concentration caused by too small an arc. The inner and outer ring groove bottoms are designed with a gap so that the rolling elements do not contact the entire groove surface. On the one hand, it leaves room for deformation caused by large loads, and on the other hand, it leaves room for lubricating oil storage to achieve heat dissipation at the groove bottom.

[0047] Specific implementation method six: Combination Figures 1 to 6 This embodiment is described. In this embodiment: the distance from the bottom of the outer groove 11 to the outer diameter of the outer ring 1 is less than half the thickness of the outer ring 2.

[0048] The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0049] The distance from the outer ring groove bottom to the outer diameter should not be greater than half of the overall thickness to avoid outer ring breakage caused by excessive stress.

[0050] Specific implementation method seven: Combination Figures 1 to 6 The present embodiment is described. In the present embodiment, an oil passage is provided inside the rolling element 3 , and an oil outlet end of the oil passage is connected to the inside of the outer groove 11 and the inner groove 21 .

[0051] The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0052] Specific implementation method eight: Combination Figures 1 to 6To illustrate the present embodiment, the oil passage described in the present embodiment includes an oil filling hole 31, an oil storage cavity 32 and a plurality of oil outlet holes 33. An oil storage cavity 32 is provided in the middle of the rolling body 3, and oil filling holes 31 are respectively provided in the middle of the end faces on both sides of the rolling body 3 along the axial direction. The outer end of the oil filling hole 31 is connected to the outside of the rolling body 3, and the inner end of the oil filling hole 31 is connected to the oil storage cavity 32. A plurality of oil outlet holes 33 are evenly distributed along the circumferential direction on the outer edge of the middle part of the rolling body 3, and each oil outlet hole 33 is respectively arranged in the radial direction, the inner end of the oil outlet hole 33 is connected to the oil storage cavity 32, and the outer ends of the oil outlet holes 33 are respectively connected to the bottom of the outer groove 11 and the inner groove 21.

[0053] The undisclosed technical features in this embodiment are the same as those in the seventh embodiment.

[0054] The rolling element end face has an oil filling hole, and the center is designed with an oil storage cavity. The oil filling hole and the chamfer of the hole should not be on the working surface. The inner wall section of the oil storage cavity is designed to be the same as the working surface. The inner wall section curvature and arc center distance are designed to ensure that the wall thickness of the working surface is basically consistent. The fillet at the intersection is slightly larger than the fillet of the rolling element. The rolling element oil storage cavity is designed with an oil outlet hole to the outside. The lubricating oil injected laterally flows to the bottom of the groove through the internal oil storage cavity and the oil outlet hole. The lubricating oil circulates through the rolling element self-lubrication to achieve high-efficiency lubrication.

[0055] The gyro-shaped rolling element has no cage and adopts a full-fill design. On the one hand, more rolling elements can be placed to meet the high-load working conditions, and on the other hand, the lubricating oil sprayed on both sides can be directly sprayed onto the working surface of the rolling element to increase lubrication efficiency. The separation of the rolling elements is achieved by the injection of lubricating oil, replacing the traditional cage structure.

[0056] Specific implementation method nine: Combination Figures 1 to 6 To explain this embodiment, the outer edge of the middle portion of the rolling element 3 in this embodiment is provided with a silver-plated layer.

[0057] The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0058] The outer edge of the gyro-shaped rolling element is silver-plated. Since the edge of the elliptical rolling element is not subjected to force, silver plating can increase the self-lubricating ability between the rolling elements.

[0059] Specific implementation method ten: Combination Figures 1 to 6 To explain this embodiment, the inner ring 2 in this embodiment includes two semi-inner rings arranged opposite to each other in the axial direction, and the semi-inner rings are respectively arranged on both sides of the rolling body 3.

[0060] The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0061] The two half inner rings are clamped together by the axial positioning elements of the shaft system where the bearing is located.

[0062] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rolling bearing using a gyroscopic rolling element, characterized in that: The invention comprises an outer ring (1), an inner ring (2) and a plurality of rolling bodies (3); the inner ring (2) is coaxially arranged on the inner side of the outer ring (1); an outer groove (11) is provided in the middle of the inner circumferential side wall of the outer ring (1) along the circumferential direction; an inner groove (21) is provided in the middle of the outer circumferential side wall of the inner ring (2) along the circumferential direction; a plurality of rolling bodies (3) are evenly distributed and embedded between the outer groove (11) and the inner groove (21) along the circumferential direction; the rolling bodies (3) are gyro-shaped; and the side walls of the rolling bodies (3) match the groove walls of the outer groove (11) and the inner groove (21).

2. The rolling bearing using a gyroscopic rolling element according to claim 1, characterized in that: The two sides of the rolling body (3) are symmetrically arranged in a cone shape, and the shapes of the outer groove (11) and the inner groove (21) are both cone-shaped.

3. The rolling bearing using a gyroscopic rolling element according to claim 2, characterized in that: The conical side walls on both sides of the rolling body (3) are concave arc surfaces, and the conical groove walls of the outer groove (11) and the inner groove (21) are both concave arc surfaces.

4. The rolling bearing using a gyroscopic rolling element according to claim 3, characterized in that: The arc curvature of the arc surface groove wall of the outer groove (11) and the inner groove (21) is smaller than the arc curvature of the arc surface groove wall of the rolling body (3).

5. The rolling bearing using a gyroscopic rolling element according to claim 1, characterized in that: The groove bottoms of the outer groove (11) and the inner groove (21) are both arc-shaped.

6. The rolling bearing using a gyroscopic rolling element according to claim 1, characterized in that: The distance from the bottom of the outer groove (11) to the outer diameter of the outer ring (1) is less than half the thickness of the outer ring (2).

7. The rolling bearing using a gyroscopic rolling element according to claim 1, characterized in that: An oil channel is provided inside the rolling body (3), and an oil outlet end of the oil channel is connected to the inside of the outer groove (11) and the inner groove (21).

8. The rolling bearing using a gyroscopic rolling element according to claim 7, characterized in that: The oil passage comprises an oil injection hole (31), an oil storage cavity (32) and a plurality of oil outlet holes (33). The rolling element (3) is provided with an oil storage cavity (32) in the middle, and the middle of the end surfaces of both sides of the rolling element (3) are provided with oil injection holes (31) along the axial direction. The outer end of the oil injection hole (31) is connected to the outside of the rolling element (3), and the inner end of the oil injection hole (31) is connected to the oil storage cavity (32). The outer edge of the middle of the rolling element (3) is evenly distributed along the circumferential direction with a plurality of oil outlet holes (33). Each oil outlet hole (33) is arranged in a radial direction. The inner end of the oil outlet hole (33) is connected to the oil storage cavity (32), and the outer end of the oil outlet hole (33) is respectively connected to the groove bottom of the outer groove (11) and the inner groove (21).

9. The rolling bearing using a gyroscopic rolling element according to claim 1, characterized in that: The outer edge of the middle part of the rolling body (3) is provided with a silver-plated layer.

10. The rolling bearing using a gyroscopic rolling element according to claim 1, characterized in that: The inner ring (2) comprises two semi-inner rings arranged opposite to each other in the axial direction, and the semi-inner rings are respectively arranged on both sides of the rolling body (3).

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