Bearing lubricating device and engine

Abstract

The invention discloses a bearing lubricating device and an engine, and relates to the technical field of aero-engines, and the bearing lubricating device comprises a bearing seat which is provided with an oil way channel partially extending in the center line direction; the nozzle is connected to the oil way outlet, an oil spraying opening of the nozzle extends in the direction away from the bearing pedestal, and an angle is formed between the extending direction of the oil spraying opening and the center line of the bearing pedestal. The rotating shaft and the center line of the bearing seat are coaxially arranged, and a gap is formed between the end part of the rotating shaft and the bearing seat; the bearing and the oil collecting ring are sequentially connected to the rotating shaft, the oil collecting ring is located on the outer side of the bearing, an oil collecting opening is formed in the outer side of the oil collecting ring and is opposite to an oil spraying opening of the nozzle, an oil collecting channel is formed in the oil collecting ring, one end of the oil collecting channel is communicated with the oil collecting opening, and the other end of the oil collecting channel is communicated with the bearing. According to the bearing lubricating device, when the nozzle is installed, only the axial position of the nozzle needs to be adjusted, and the oil spraying opening can face the oil collecting ring, so that the installation requirement of the nozzle is lowered, and the installation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, specifically to a bearing lubrication device and an engine. Background Technology

[0002] Currently, all aero engines use rolling bearings instead of sliding bearings. Although rolling bearings have some drawbacks, they offer many advantages over sliding bearings, such as a lower coefficient of friction, reliable performance at high speeds, and shorter axial length. However, rolling bearings generate a significant amount of heat during operation, necessitating effective cooling measures; otherwise, they will rapidly fail once the bearing temperature rises.

[0003] Currently, most aero engines use either jet lubrication or under-ring lubrication to cool the bearings. Jet lubrication requires the lubricating oil to be sprayed directly into the rolling element / cage clearance, while under-ring lubrication requires the lubricating oil to be sprayed into the bearing inner ring or delivered to the oil supply ring and then into the bearing inner ring. Both of these lubrication methods have high precision requirements for the position, angle, and flow rate of the nozzle.

[0004] Chinese patent document CN110714987A discloses a radial oil-collecting ring under-ring lubrication device, aiming to solve the problems of poor lubrication and cooling effects in bearings under high-speed, high-temperature, and heavy-load conditions, where lubricating oil is difficult to enter the bearing. Specifically, traditional lubrication involves spraying oil directly onto the high-speed rotating bearing from a nozzle, where oil droplets are easily blown away by airflow. The invention concept of this patent document is to design a radial oil-collecting ring that rotates synchronously with the main shaft. The radial oil-collecting ring first catches the sprayed oil, and then uses the centrifugal force of rotation as power to "pump" the oil into a pre-set pipeline, ultimately delivering it precisely to the bearing. The radial oil-collecting ring is the core of this patent; it is a rotating cylinder fitted onto the shaft, with a ring of oil-collecting blades on the outer side to "grab" the sprayed lubricating oil.

[0005] Using the above method, the nozzle needs to spray oil from the outside along the tangential direction of the main shaft towards the rotating cylinder. During the rotation of the main shaft, the oil spray nozzle cannot always be directly aligned with the oil inlet of the rotating cylinder, causing lubricating oil to accumulate there. This accumulated lubricating oil needs to be pumped into the bearing by the rotation of the oil receiving blades. However, this accumulated lubricating oil is prone to causing oil leakage problems.

[0006] Chinese patent document CN115614649A discloses a bearing lubrication structure, in which a locking nut and a bearing inner ring are sequentially mounted on a shaft. During operation, a nozzle sprays lubricating oil at an angle from the outside into the rotating locking nut. The locking nut has a specially designed annular groove (first groove) on its inner wall, allowing the lubricating oil to directly enter and be collected. Several axial channels (first conveying channels) are connected to the locking nut; under centrifugal force, the collected oil is "thrown" into the bearing along these channels.

[0007] However, in the above scheme, because the nozzle is bent, the orientation of the nozzle is highly critical during installation. Summary of the Invention

[0008] In view of this, the present invention provides a bearing lubrication device and an engine to solve the problem of high nozzle installation requirements in existing centerline bearing lubrication devices.

[0009] This invention provides a bearing lubrication device, comprising: A bearing housing has an oil passage, the oil passage having a portion extending along the centerline of the bearing housing, and the oil passage having an oil outlet extending out of the bearing housing; A nozzle is connected to the oil outlet. The nozzle has an oil injection port that extends away from the bearing housing. The extension direction of the oil injection port is at an angle to the centerline of the bearing housing. A rotating shaft is coaxially arranged with the center line of the bearing housing, and there is a gap between the end of the rotating shaft and the bearing housing; A bearing and an oil collecting ring are connected sequentially to the rotating shaft. The oil collecting ring is located outside the bearing and has an oil collecting port on its outer side. The oil collecting port is opposite to the oil spray port of the nozzle. The oil collecting ring has an oil collection channel inside, with one end of the oil collection channel communicating with the oil collecting port and the other end communicating with the bearing.

[0010] The bearing lubrication device provided by this invention has a nozzle connected to the oil outlet on the centerline of the bearing housing. The nozzle's spray port extends away from the bearing housing and forms an angle with the bearing housing's centerline, allowing the lubricating oil to be sprayed at a specific angle. This enables more targeted spraying to the oil collection port of the oil collecting ring, achieving precise oil supply, improving the accuracy and effectiveness of lubrication, and avoiding lubricating oil waste. When installing the nozzle, only the axial position of the nozzle needs to be adjusted to align the spray port with the oil collecting ring, thereby reducing the nozzle's installation requirements and improving installation efficiency.

[0011] Optionally, the angle between the extension direction of the nozzle's oil inlet and the centerline of the bearing housing is 45°±5°. This configuration allows the lubricating oil to be sprayed more concentratedly and precisely onto the oil collection ring opposite the spray nozzle. This specific angle of spraying enables the lubricating oil to enter the oil collection ring more directly and efficiently, thereby achieving precise lubrication of the bearing, greatly improving the accuracy and effectiveness of lubrication, and reducing oil loss and waste during transmission.

[0012] Optionally, the oil collection port is an annular shape with one end opening towards the rotating shaft. This design significantly increases the relative area of ​​the oil collection port, making it easier for lubricating oil to enter and effectively improving oil collection efficiency. This ensures that more lubricating oil can smoothly enter the oil collection channel, providing sufficient oil volume for subsequent bearing lubrication. When the lubricating oil enters the oil collection port, it can be more evenly distributed around the port, thus flowing evenly into the oil collection channel. This avoids uneven lubrication caused by excessive or insufficient oil intake in certain areas of the oil collection port, helping to improve the overall lubrication consistency of the bearing, ensuring good lubrication for all parts of the bearing, and reducing localized wear and malfunctions caused by uneven lubrication.

[0013] Optionally, the oil collection channels are arranged in multiple circumferentially within the oil collection ring, and the straight-line distance between the oil collection channels and the center of the rotating shaft gradually increases from the oil collection port to the bearing.

[0014] Multiple oil collection channels are spaced circumferentially, allowing the lubricating oil entering from the oil collection port to be more evenly distributed in the circumferential direction of the oil collection ring. Multiple channels can simultaneously collect and transport lubricating oil, avoiding the oil concentration in a single area that might occur with only a single channel. This ensures relatively uniform lubrication of all circumferential parts between the inner and outer rings of the bearing, effectively reducing localized wear caused by uneven lubrication and extending the overall service life of the bearing.

[0015] The straight-line distance between the oil collection channel and the center of the rotating shaft gradually increases from the oil collection port to the bearing. This design guides the lubricating oil to generate a certain centrifugal force effect as it flows towards the bearing. As the lubricating oil flows towards the bearing, the centrifugal force causes the lubricating oil to have a more uniform distribution in the radial direction of the bearing, further optimizing the distribution of lubricating oil between the inner and outer rings of the bearing, improving the comprehensiveness and effectiveness of lubrication, and ensuring that the rolling elements of the bearing at different radial positions can receive good lubrication.

[0016] Optionally, the nozzle has a mounting portion and an operating portion, the operating portion being connected to the root of the mounting portion, and the mounting portion being connected to the oil passage of the bearing housing via a threaded structure.

[0017] The mounting section connects to the oil passage of the bearing housing via a threaded structure, a widely used and mature connection method. The threaded connection allows installers to securely mount the nozzle to the bearing housing with a simple rotation, requiring no complex tools or specialized skills. For nozzle maintenance or replacement, a reverse rotation easily removes the nozzle, greatly improving ease of maintenance. Compared to non-removable connections such as welding, this detachable threaded connection significantly facilitates subsequent equipment inspection and component replacement, reducing maintenance costs.

[0018] The operating unit is connected to the base of the mounting unit, providing a good leverage point for installation and disassembly. Operators can more easily clamp the operating unit and apply torque to tighten or loosen the threaded connection. Compared to operating directly on the mounting unit, it allows for better force application and is less likely to damage the connection between the mounting unit and the oil passage, further improving the convenience and reliability of installation and disassembly.

[0019] Optionally, an adjusting shim is provided between the operating part and the bearing housing. The adjusting shim provides additional adjustment space between the operating part and the bearing housing. Since the positional accuracy of the oil nozzle is crucial for the accurate spraying of lubricating oil to the oil collector, the axial position of the nozzle can be finely adjusted by increasing or decreasing the thickness of the adjusting shim. Even if the nozzle position deviates slightly during installation due to factors such as threaded connections, it can be easily corrected using the adjusting shim, ensuring that the oil nozzle always precisely faces the oil collector, thereby achieving precise lubrication and improving the effectiveness of the lubrication system.

[0020] Optionally, a wire thread insert is provided inside the oil outlet of the bearing housing. The wire thread insert is typically made of high-strength, corrosion-resistant steel wire and, when installed inside the oil outlet of the bearing housing, enhances the strength of the thread at that location. Compared to threads directly machined onto the bearing housing, the wire thread insert has higher hardness and toughness, enabling it to withstand greater tightening torque. This effectively prevents stripping, deformation, and other damage to the thread during nozzle installation and removal, extending the thread's service life and ensuring a consistently secure and reliable connection between the nozzle and the bearing housing.

[0021] Optionally, the oil collecting ring is connected to the end of the rotating shaft via a threaded structure, and the end of the rotating shaft has a recess for mounting the oil collecting ring. The threaded connection provides a large axial clamping force. During high-speed rotation of the rotating shaft, this clamping force effectively prevents the oil collecting ring from falling off, ensuring that the oil collecting ring and the rotating shaft operate synchronously and stably, laying the foundation for the stable operation of the bearing lubrication system. The recess at the end of the rotating shaft provides precise positioning for the installation of the oil collecting ring. The oil collecting ring is installed within the recess, the shape and size of which match the oil collecting ring, restricting radial and circumferential movement of the oil collecting ring during installation, allowing the oil collecting ring to be accurately installed in the predetermined position.

[0022] Optionally, the bearing has an inner ring, an outer ring, and rolling elements, the rolling elements being disposed between the inner ring and the outer ring, and the inner ring being connected to the rotating shaft; the inner ring of the bearing has a groove, one end of which communicates with the oil collection channel of the oil collecting ring, and the other end extending in a direction away from the oil collecting ring; the inner ring also has an opening, one end of which communicates with the groove, and the other end leading to the rolling elements.

[0023] The grooves and openings ensure a continuous supply of lubricating oil to the rolling elements during bearing operation. Even under high-speed rotation or varying loads, the grooves store and guide the lubricating oil, while the openings continuously provide lubrication. This effectively prevents dry friction caused by momentary oil shortages, maintains the stability of the lubrication system, and guarantees reliable bearing operation.

[0024] The present invention also provides an engine, comprising: the bearing lubrication device described in any of the above embodiments.

[0025] The engine provided by this invention has all the advantages of the aforementioned bearing lubrication device. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a front sectional view of a bearing lubrication device provided in an embodiment of the present invention; Figure 2 for Figure 1 An enlarged view of the nozzle shown; Figure 3 for Figure 1 A three-dimensional view of the nozzle shown; Figure 4 for Figure 1 Enlarged view of the nozzle and bearing housing; Figure 5 for Figure 1 Enlarged view of the rotating shaft, bearings, and oil collector ring; Figure 6 for Figure 1 Enlarged view of CIMC's oil ring; Figure 7 for Figure 1 Enlarged view of the rotating shaft.

[0028] Explanation of reference numerals in the attached figures 1. Bearing housing; 101. Oil passage; 102. Wire thread insert; 2. Nozzle; 201. Injection port; 202. Mounting part; 203. Operating part; 3. Rotating shaft; 301. Recessed platform; 4. Bearing; 401. Inner ring; 402. Outer ring; 403. Rolling element; 404. Groove; 405. Opening; 5. Oil collecting ring; 501. Oil collecting port; 502. Oil collection channel; 503. Oil dam; 6. Adjusting pad. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Currently, the method of using jet lubrication to cool bearings in aero engines is to spray lubricating oil directly into the gap between the rolling elements and the cage through nozzles.

[0034] There are two main types of nozzle designs: individual component designs and integrated bearing housing designs. Individual component nozzles offer advantages such as ease of manufacturing, cleaning, and maintenance, but their structure is more complex. Integrated bearing housing nozzles have a simple structure and no leakage issues, but they are more difficult to manufacture, have poor maintainability, and if the nozzle fails, the entire bearing housing must be scrapped.

[0035] In addition, when the nozzle and bearing housing are designed separately, the oil passage between them needs to be sealed. Specifically, the oil passage between the nozzle and bearing housing is generally sealed with an O-ring.

[0036] In addition, the axial dimension between the nozzle orifice and the bearing is generally ensured using an adjusting shim made of martensitic stainless steel.

[0037] like Figure 1 As shown, this is a specific embodiment of the bearing lubrication device provided in this example, including: a bearing housing 1, a nozzle 2, a rotating shaft 3, a bearing 4, and an oil collecting ring 5. The bearing housing 1 has an oil passage 101, which extends partially along the centerline of the bearing housing 1, and has an oil outlet extending out of the bearing housing 1.

[0038] like Figure 1 As shown, the centerline of the bearing housing 1 is coaxial with the centerline of the rotating shaft 3, and there is a gap between the end of the rotating shaft 3 and the bearing housing 1. This gap is used to facilitate the nozzle 2 to spray oil toward the bearing 4.

[0039] like Figure 2 , Figure 3As shown, the nozzle 2 has a mounting part 202 and an operating part 203. The operating part 203 is connected to the root of the mounting part 202. The mounting part 202 is connected to the oil passage 101 of the bearing housing 1 via a threaded structure. A wire thread sleeve 102 is provided in the oil passage outlet of the bearing housing 1. Specifically, in this embodiment, the nozzle 2 is a bolt structure, the operating part 203 is a nut, and the mounting part 202 is a screw. The threaded structure on the mounting part 202 adopts a fine thread with better self-locking and sealing properties. A blind hole is machined in the center of the mounting part 202 as an oil injection channel, and a countersunk hole is machined on the operating part 203 as an oil injection port 201, ensuring that the outlet of the oil injection port 201 is perpendicular to the end face of the operating part 203, thereby improving the uniformity of oil flow at the outlet of the oil injection port 201.

[0040] like Figure 4 As shown, an adjusting shim 6 is provided between the operating part 203 and the bearing housing 1. The adjusting shim 6 is made of copper and can both adjust the axial dimension from the nozzle 2 orifice to the bearing 4 and seal the lubricating oil. Copper, being a relatively soft and malleable material, is compressed when the nozzle 2 is tightened onto the bearing housing 1 via a threaded structure. Under this compression, the copper shim fills the tiny gap between the operating part 203 and the bearing housing 1, forming an effective seal and preventing lubricating oil leakage from this connection. This not only avoids lubricating oil waste but also ensures that sufficient lubricating oil is sprayed from the nozzle 2 along a predetermined path, improving the efficiency of the lubrication system.

[0041] Of course, the above description is not limiting. In some alternative embodiments, the adjustment pad 6 may also be made of other materials, such as martensitic stainless steel.

[0042] like Figure 4 As shown, the nozzle 2 is connected to the oil outlet on the centerline of the bearing housing 1, and the oil injection port 201 extends away from the bearing housing 1, with the extension direction of the oil injection port 201 forming an angle with the centerline of the bearing housing 1. Specifically, the angle between the extension direction of the oil injection port 201 of the nozzle 2 and the centerline of the bearing housing 1 is 45°±5°. In this embodiment, the angle between the oil injection port 201 and the centerline of the bearing housing 1 is 45°. This configuration allows the lubricating oil to be sprayed in a more concentrated and precise manner onto the oil collection port 501 of the oil collection ring 5 opposite to the oil injection port 201. This specific angle spraying allows the lubricating oil to enter the oil collection ring 5 more directly and efficiently, thereby achieving precise lubrication of the bearing 4, greatly improving the accuracy and effectiveness of lubrication, and reducing the loss and waste of lubricating oil during transmission.

[0043] Of course, the above description is not limiting. In some alternative embodiments, nozzles 2 with different fixed angles (such as 30°, 60°, etc.) can be provided. During installation, a nozzle 2 with a suitable angle can be selected according to factors such as the specific structure of the bearing 4, the rotation speed of the rotating shaft 3, and the position of the oil collecting ring 5 to meet the lubrication needs of different application scenarios.

[0044] like Figure 5 As shown, the bearing 4 and the oil collecting ring 5 are sequentially connected to the rotating shaft 3. Specifically, the bearing 4 is tightly fitted to the inner side of the rotating shaft 3, and the oil collecting ring 5 is threaded to the outer side of the rotating shaft 3. The outer end face of the oil collecting ring 5 is flush with the end of the rotating shaft 3. The oil collecting ring 5 has an oil collecting port 501, which is located on the outer end face of the oil collecting ring 5. The oil collecting port 501 is opposite to the oil spray port 201 of the nozzle 2. The oil collecting ring 5 has an oil collection channel 502 inside. One end of the oil collection channel 502 communicates with the oil collecting port 501, and the other end communicates with the inner ring 401 and the outer ring 402 of the bearing 4.

[0045] like Figure 5 As shown, the bearing 4 has an inner ring 401, an outer ring 402, and rolling elements 403. The rolling elements 403 are disposed between the inner ring 401 and the outer ring 402. The inner ring 401 is connected to the rotating shaft 3. The inner ring 401 of the bearing 4 has a groove 404. One end of the groove 404 communicates with the oil collection channel 502 of the oil collecting ring 5, and the other end extends away from the oil collecting ring 5. The inner ring 401 also has an opening 405. One end of the opening 405 communicates with the groove 404, and the other end leads to the rolling element 403. The oil collection channel 502 of the oil collecting ring 5 communicates with the groove 404 of the inner ring 401 of the bearing 4, forming a precise lubricating oil delivery path, allowing the lubricating oil collected from the oil collecting ring 5 to flow directly and smoothly into the groove 404. The opening 405 on the inner ring 401 connects the groove 404 to the rolling element 403, providing a direct channel for lubricating oil to reach the rolling element 403. This direct connection greatly improves the transmission efficiency of lubricating oil, enabling the rolling element 403 to receive lubrication in a timely manner, reducing the frictional resistance between the rolling element 403 and the inner ring 401 and outer ring 402, and improving the rotational accuracy and efficiency of the bearing 4. This design avoids unnecessary loss and deviation of lubricating oil during transmission, ensuring that the lubricating oil accurately reaches the location requiring lubrication. When the inner ring 401 of the bearing 4 rotates, the lubricating oil is more evenly distributed along the groove 404 in the circumferential direction. This means that the rolling element 403 can obtain lubricating oil relatively evenly throughout the entire circumference of the bearing 4, reducing local wear differences caused by uneven lubrication.

[0046] Of course, the above description is not limiting. In some alternative embodiments, the bearing 4 may also be a sliding bearing 4.

[0047] like Figure 6 As shown, the oil collecting ring 5 is annular, and the oil collecting port 501 is annular with one end open towards the rotating shaft 3. This design greatly increases the relative area of ​​the oil collecting port 501, making it easier for lubricating oil to enter the oil collecting port 501, effectively improving oil collection efficiency and ensuring that more lubricating oil can smoothly enter the oil receiving channel 502, providing sufficient oil quantity for subsequent lubrication of the bearing 4. When the lubricating oil enters the oil collecting port 501, it can be more evenly distributed around the oil collecting port 501, and then flow evenly into the oil receiving channel 502. This avoids uneven lubrication caused by excessive or insufficient oil receiving in some areas of the oil collecting port 501, helps to improve the lubrication consistency of the entire bearing 4, ensures good lubrication of all parts of the bearing 4, and reduces local wear and failures caused by uneven lubrication.

[0048] like Figure 6 As shown, in some embodiments, multiple oil collection channels 502 are circumferentially spaced within the oil collecting ring 5, and the linear distance between the oil collection channels 502 and the center of the rotating shaft 3 gradually increases from the oil collection port 501 towards the bearing 4. The multiple circumferentially spaced oil collection channels 502 allow the lubricating oil entering from the oil collection port 501 to be more evenly distributed in the circumferential direction of the oil collecting ring 5. Multiple oil collection channels 502 can simultaneously collect and transport lubricating oil, avoiding the concentration of lubricating oil in a certain area that might occur with only a single oil collection channel 502. This ensures that all circumferential parts between the inner ring 401 and the outer ring 402 of the bearing 4 receive relatively uniform lubrication, effectively reducing localized wear of the bearing 4 caused by uneven lubrication and extending the overall service life of the bearing 4. The gradual increase in the linear distance between the oil collection channels 502 and the center of the rotating shaft 3 from the oil collection port 501 towards the bearing 4 guides the lubricating oil to generate a certain centrifugal force effect during its flow towards the bearing 4. As the lubricating oil flows into the bearing 4, the centrifugal force causes the lubricating oil to have a more uniform distribution in the radial direction of the bearing 4, which further optimizes the distribution of the lubricating oil between the inner and outer rings 402 of the bearing 4, improves the comprehensiveness and effectiveness of lubrication, and ensures that the rolling elements 403 of the bearing 4 at different radial positions can be well lubricated.

[0049] like Figure 6As shown, in some embodiments, an oil dam 503 is provided at the end of the oil collecting ring 5 away from the bearing 4. Lubricating oil is sprayed from the oil injection port 201 into the space between the oil collection channel 502 and the oil dam 503. The radial height of each oil collection channel 502 gradually increases, and the radial height of the lowest point of the oil dam 503 is less than the radial height of the inlet of the oil collection channel 502. This ensures that the lubricating oil is thrown from the inlet of the oil collection channel 502 into the outlet of the oil collection channel 502 under the action of centrifugal force in the oil collecting ring 5 and then smoothly enters the interior of the bearing 4.

[0050] In some embodiments, the oil collection channel 502 may be spirally encircled within the oil collecting ring 5, extending in a spiral shape from the oil collecting port 501 toward the bearing 4. This design allows the lubricating oil to flow in a spiral pattern within the oil collecting ring 5, further enhancing the centrifugal force effect and enabling a more uniform distribution of the lubricating oil in both the circumferential and radial directions.

[0051] like Figure 7 As shown, the end of the rotating shaft 3 has a recess 301 for mounting the oil collecting ring 5. The recess 301 has an external thread structure for connecting with the oil collecting ring 5. The oil collecting ring 5 is connected to the end of the rotating shaft 3 via the threaded structure, and the threaded connection provides a large axial clamping force. During the high-speed rotation of the rotating shaft 3, this clamping force effectively prevents the oil collecting ring 5 from falling off the rotating shaft 3, ensuring that the oil collecting ring 5 and the rotating shaft 3 operate synchronously and stably, laying the foundation for the stable operation of the bearing 4 lubrication system. The recess 301 at the end of the rotating shaft 3 provides precise positioning for the installation of the oil collecting ring 5. The oil collecting ring 5 is installed in the recess 301, the shape and size of which match the oil collecting ring 5, restricting the radial and circumferential movement of the oil collecting ring 5 during installation, so that the oil collecting ring 5 can be accurately installed in the predetermined position.

[0052] Working principle: The bearing lubrication device provided in this embodiment has a nozzle 2 connected to the oil outlet on the centerline of the bearing housing 1. The oil spray nozzle 201 extends away from the bearing housing 1 and forms an angle with the centerline of the bearing housing 1, allowing the lubricating oil to be sprayed out at a specific angle. This allows for more targeted spraying to the oil collection port 501 of the oil collecting ring 5, achieving precise oil supply, improving the accuracy and effectiveness of lubrication, and avoiding lubricating oil waste. When installing the nozzle 2, only the axial position of the nozzle 2 needs to be adjusted to make the oil spray nozzle 201 face the oil collecting ring 5, thereby reducing the installation requirements of the nozzle 2 and improving installation efficiency.

[0053] The bearing lubrication device provided in this embodiment uses a nozzle 2 that can be modified from a standard screw. The oil injection channel and countersunk nozzle 201 are machined. Compared to traditional nozzles 2, it eliminates the need for a mounting edge and welded plugs, making it easier to manufacture, disassemble, and replace. With fewer parts, it achieves the bearing 4 lubrication function within a small space and a lightweight design. The adjusting shim 6 serves both sealing and dimensional adjustment functions. Compared to traditional lubrication devices, it eliminates the need for an O-ring seal, resulting in a simpler structure and more compact space.

[0054] On the other hand, embodiments of the present invention also provide an engine, including the bearing lubrication device described in the above solution.

[0055] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A bearing lubrication device, characterized in that, include: The bearing housing (1) has an oil passage (101) having a portion extending along the centerline of the bearing housing (1) and an oil outlet extending out of the bearing housing (1). A nozzle (2) is connected to the oil outlet. The nozzle (2) has an oil injection port (201). The oil injection port (201) extends in a direction away from the bearing seat (1). The extension direction of the oil injection port (201) is at an angle to the center line of the bearing seat (1). The rotating shaft (3) is coaxially arranged with the center line of the bearing seat (1), and there is a gap between the end of the rotating shaft (3) and the bearing seat (1); The bearing (4) and the oil collecting ring (5) are connected in sequence to the rotating shaft (3). The oil collecting ring (5) is located outside the bearing (4). The outer side of the oil collecting ring (5) has an oil collecting port (501). The oil collecting port (501) is opposite to the oil spray port (201) of the nozzle (2). The oil collecting ring (5) has an oil receiving channel (502). One end of the oil receiving channel (502) is connected to the oil collecting port (501), and the other end is connected to the bearing (4).

2. The bearing lubrication device according to claim 1, characterized in that, The angle between the extension direction of the oil injection port (201) of the nozzle (2) and the center line of the bearing seat (1) is 45°±5°.

3. The bearing lubrication device according to claim 1, characterized in that, The oil collection port (501) is annular.

4. The bearing lubrication device according to claim 1, characterized in that, The oil collection channel (502) has multiple channels spaced circumferentially within the oil collection ring (5), and the straight distance between the oil collection channel (502) and the center of the rotating shaft (3) gradually increases from the oil collection port (501) to the bearing (4).

5. The bearing lubrication device according to claim 1, characterized in that, The nozzle (2) has a mounting part (202) and an operating part (203). The operating part (203) is connected to the root of the mounting part (202). The mounting part (202) is connected to the oil passage (101) of the bearing seat (1) by a threaded structure.

6. The bearing lubrication device according to claim 5, characterized in that, An adjusting pad (6) is provided between the operating part (203) and the bearing seat (1).

7. The bearing lubrication device according to claim 5, characterized in that, A wire thread sleeve (102) is provided in the oil outlet of the bearing housing (1).

8. The bearing lubrication device according to any one of claims 1-7, characterized in that, The oil collecting ring (5) is connected to the end of the rotating shaft (3) by a threaded structure, and the end of the rotating shaft (3) has a recess (301) for mounting the oil collecting ring (5).

9. The bearing lubrication device according to any one of claims 1-7, characterized in that, The bearing (4) has an inner ring (401), an outer ring (402) and a rolling element (403). The rolling element (403) is disposed between the inner ring (401) and the outer ring (402). The inner ring (401) is connected to the rotating shaft (3). The inner ring (401) of the bearing (4) has a groove (404). One end of the groove (404) is connected to the oil collection channel (502) of the oil collecting ring (5), and the other end extends away from the oil collecting ring (5). The inner ring (401) also has an opening (405). One end of the opening (405) is connected to the groove (404), and the other end leads to the rolling element (403).

10. An engine, characterized in that, include: The bearing lubrication device according to any one of claims 1-9.

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