Oil supply lubricating device, gear case and oil supply lubricating method

Abstract

The application discloses an oil supply lubricating device, a gear box and an oil supply lubricating method, and belongs to the technical field of lubrication. The oil supply lubricating device comprises a slip ring structure, the slip ring structure is arranged between a first component and a second component capable of relative rotation, part of the first component is arranged in a containing cavity of the second component, and the slip ring structure is sleeved on the first component and located in the containing cavity. The slip ring structure has an oil guide channel, the slip ring structure is in interference fit with the first component, the slip ring structure is in clearance fit with the second component, and the slip ring structure can be deformed with temperature change. The gear box comprises the oil supply lubricating device. The oil supply lubricating method adopts the oil supply lubricating device. Since the slip ring structure can be deformed with temperature change, the fitting state can be changed, the slip ring structure realizes the floating function, and therefore, the slip ring structure can be prevented from being abraded, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of lubrication technology, and in particular to an oil supply lubrication device, a gearbox, and an oil supply lubrication method. Background Technology

[0002] The lubrication system of a gearbox serves multiple functions, including lubrication, cooling, cleaning, rust prevention, sealing, and hydraulic control. During operation, relative sliding or movement occurs between the gears and bearings involved in transmission, leading to friction and wear, increasing power consumption and reducing transmission efficiency. This is especially crucial for high-speed transmissions, where gearbox lubrication becomes paramount. The quality of the lubrication system affects the overall thermal balance of the gearbox and the wear of gears and bearings; in severe cases, it can lead to broken gear teeth, overheating or burnout of bearings, directly determining the quality and service life of the gearbox.

[0003] In wind turbine gearboxes, oil supply slip rings are primarily used to assist in the flow of oil between rotating and stationary components. For example, an oil supply slip ring is installed between the rotating frame and the gearbox housing. The rotating frame can rotate relative to the gearbox housing. The oil supply slip ring, also called an oil ring, is generally ring-shaped and fitted onto the rotating frame. Traditionally, oil supply slip rings are made of copper and installed on one side of the rotating frame or gearbox housing with an interference fit. However, under actual production, transportation, and different operating conditions, the gearbox housing and rotating frame are prone to tilting, leading to significant wear on the oil supply slip ring and reducing its service life. Summary of the Invention

[0004] The purpose of this invention is to provide an oil supply lubrication device, a gearbox, and an oil supply lubrication method to solve the technical problems of severe wear and short service life of the oil supply slip ring in the prior art.

[0005] Based on the above concept, the technical solution adopted by this invention is as follows:

[0006] An oil supply and lubrication device includes a slip ring structure, which is disposed between a first component and a second component that are rotatable relative to each other. A portion of the first component passes through a receiving cavity of the second component, and the slip ring structure is sleeved on the first component and located within the receiving cavity.

[0007] The slip ring structure has an oil guiding channel, the slip ring structure is interference-fitted with the first component, the slip ring structure is clearance-fitted with the second component, and the slip ring structure can deform with temperature changes.

[0008] The slip ring structure includes two slip ring bodies spaced apart along the axial direction, and the oil guide channel is formed between the two slip ring bodies. Lubricating oil can flow radially into the oil inlet end of the oil guide channel and flow out from the oil outlet end of the oil guide channel.

[0009] The flow area of ​​the oil outlet is smaller than that of the oil inlet.

[0010] In particular, the flow area of ​​the oil guide channel gradually decreases from the oil inlet end to the oil outlet end.

[0011] Specifically, from the oil inlet end to the oil outlet end, the flow area of ​​the oil guiding channel first increases and then decreases.

[0012] In the oil guide channel, at least one of the slip ring bodies has an oil storage groove recessed on its end face, and the oil storage groove is located between the oil inlet end and the oil outlet end.

[0013] In the oil guiding channel, oil guiding walls are provided on both sides of the oil outlet end, and the two oil guiding walls can be in line contact.

[0014] A gearbox includes an oil supply and lubrication device as described above.

[0015] The first component is the shaft of the gearbox, and the second component is the housing of the gearbox.

[0016] An oil supply lubrication method, employing the oil supply lubrication device described above, includes:

[0017] During initial operation, the first component and the second component rotate relative to each other, the slip ring structure rotates with the first component, and the lubricating oil flows in the oil guide channel;

[0018] During operation, as the operating temperature rises, the slip ring structure expands and deforms. When the operating temperature is greater than or equal to the first set value, the slip ring structure is clearance-fitted with the first component and interference-fitted with the second component.

[0019] After the work is completed, as the working temperature decreases, the slip ring structure shrinks and deforms. When the working temperature is less than or equal to the second set value, the slip ring structure is in an interference fit with the first component and in a clearance fit with the second component.

[0020] The beneficial effects of this invention are:

[0021] The oil supply and lubrication device proposed in this invention includes a slip ring structure, which is disposed between a first component and a second component that can rotate relative to each other. A portion of the first component passes through a receiving cavity of the second component, and the slip ring structure is sleeved on the first component and located within the receiving cavity. During initial operation, the first and second components rotate relative to each other, and the slip ring structure rotates with the first component, allowing lubricating oil to flow in the oil guide channel. During operation, as the operating temperature rises, the slip ring structure expands and deforms. When the operating temperature is greater than or equal to a first set value, the slip ring structure has a clearance fit with the first component and an interference fit with the second component. After operation, as the operating temperature decreases, the slip ring structure contracts and deforms. When the operating temperature is less than or equal to a second set value, the slip ring structure has an interference fit with the first component and a clearance fit with the second component. Because the slip ring structure can deform with temperature changes, thereby changing the fit state, it achieves a floating function, thus preventing wear on the slip ring structure and improving its service life. Attached Figure Description

[0022] Figure 1 This is a partial structural schematic diagram of the oil supply and lubrication device provided in Embodiment 1 of the present invention;

[0023] Figure 2 This is a cross-sectional view of the oil supply and lubrication device provided in Embodiment 1 of the present invention;

[0024] Figure 3 yes Figure 2 Enlarged view of point A;

[0025] Figure 4 This is a partial structural schematic diagram of the first type of oil supply and lubrication device provided in Embodiment 2 of the present invention;

[0026] Figure 5 This is a partial structural schematic diagram of the second type of oil supply and lubrication device provided in Embodiment 2 of the present invention;

[0027] Figure 6 This is a partial structural schematic diagram of the third type of oil supply and lubrication device provided in Embodiment 2 of the present invention;

[0028] Figure 7 This is a partial structural schematic diagram of the fourth type of oil supply and lubrication device provided in Embodiment 2 of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the first slip ring body provided in Embodiment 3 of the present invention;

[0030] Figure 9 This is a cross-sectional view of the first type of oil supply and lubrication device provided in Embodiment 3 of the present invention;

[0031] Figure 10 yes Figure 9 Enlarged view of point B;

[0032] Figure 11 This is a schematic diagram of the structure of the second slip ring body provided in Embodiment 3 of the present invention;

[0033] Figure 12 This is a cross-sectional view of the second type of oil supply and lubrication device provided in Embodiment 3 of the present invention;

[0034] Figure 13 yes Figure 12 Enlarged view of point C;

[0035] Figure 14 This is a partial structural schematic diagram of the third type of oil supply and lubrication device provided in Embodiment 3 of the present invention;

[0036] Figure 15 This is a partial structural schematic diagram of the oil supply and lubrication device provided in Embodiment 4 of the present invention;

[0037] Figure 16 yes Figure 15 Partial structural diagram;

[0038] Figure 17 This is a partial structural schematic diagram of the oil supply and lubrication device provided in Embodiment 5 of the present invention;

[0039] Figure 18 This is a cross-sectional view of the oil supply and lubrication device provided in Embodiment 5 of the present invention;

[0040] Figure 19 yes Figure 18 Enlarged view of point D;

[0041] Figure 20 This is a schematic diagram of the structure of a slip ring body provided in Embodiment 5 of the present invention;

[0042] Figure 21 This is an exploded structural diagram of an oil supply and lubrication device provided in Embodiment Six of the present invention;

[0043] Figure 22 yes Figure 21 A schematic diagram of the provided slip ring structure;

[0044] Figure 23 This is a partial structural schematic diagram of another oil supply and lubrication device provided in Embodiment Six of the present invention;

[0045] Figure 24 yes Figure 23 A schematic diagram of the provided slip ring structure.

[0046] In the picture:

[0047] 100. First component; 101. First channel;

[0048] 200. Second component; 201. Second channel;

[0049] 300. Slip ring structure; 301. Oil guide channel; 3011. Oil guide wall; 302. Slip ring body; 3021. Oil reservoir; 3022. Protrusion; 30221. Contact line; 303. Cage; 3031. Oil passage; 304. Connector;

[0050] 400. Buckle. Detailed Implementation

[0051] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0052] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0055] Example 1

[0056] See Figures 1 to 3This embodiment provides an oil supply and lubrication device, including a slip ring structure 300. The slip ring structure 300 is disposed between a first component 100 and a second component 200 that are rotatable relative to each other. A portion of the first component 100 passes through the receiving cavity of the second component 200, and the slip ring structure 300 is sleeved on the first component 100 and located within the receiving cavity. The slip ring structure 300 has an oil guiding channel 301. The slip ring structure 300 is interference-fitted with the first component 100 and clearance-fitted with the second component 200. The slip ring structure 300 can deform with temperature changes. The oil guiding channel 301 can be formed by opening within the slip ring structure 300 or by several portions of the slip ring structure 300 surrounding it.

[0057] During initial operation, the first component 100 and the second component 200 rotate relative to each other, and the slip ring structure 300 rotates with the first component 100, allowing lubricating oil to flow in the oil guide channel 301. During operation, as the operating temperature rises, the slip ring structure 300 expands and deforms. When the operating temperature is greater than or equal to a first set value, the slip ring structure 300 and the first component 100 are in clearance fit, while the slip ring structure 300 and the second component 200 are in interference fit. After operation, as the operating temperature decreases, the slip ring structure 300 contracts and deforms. When the operating temperature is less than or equal to a second set value, the slip ring structure 300 and the first component 100 are in interference fit, while the slip ring structure 300 and the second component 200 are in clearance fit.

[0058] Because the slip ring structure 300 can deform with temperature changes, thereby altering its fit and enabling it to float, wear on the slip ring structure 300 can be prevented, thus extending its service life. The "floating" aspect refers to the slip ring structure 300's ability to float radially. Regarding the axial direction of the slip ring structure 300, a latch 400 can be used to limit axial movement; specifically, the latch 400 is located on the outer side of the slip ring structure 300.

[0059] The clearance fit between the slip ring structure 300 and the second component 200 refers to the existence of a gap between the outer wall of the slip ring structure 300 and the inner wall of the accommodating cavity. At room temperature, the gap between the slip ring structure 300 and the inner wall of the accommodating cavity of the second component 200 can be 0.5 mm to meet general working loads and operating environments. As the temperature rises, the slip ring structure 300 disengages from the first component 100 and gradually expands until it interferes with the inner wall of the accommodating cavity. At this point, the slip ring structure 300 and the first component 100 make clearance contact, which can also be 0.5 mm. The gap should not be too large to prevent oil leakage.

[0060] Specifically, the coefficient of thermal expansion of the first component 100 is lower than that of the slip ring structure 300, and the coefficient of thermal expansion of the second component 200 is lower than that of the slip ring structure 300. Therefore, when the slip ring structure 300 expands and deforms with increasing temperature, the deformation of the first component 100 and the second component 200 is very small, or even negligible, thereby enabling the slip ring structure 300 to float.

[0061] The slip ring structure 300 can be made of existing elasto-plastic materials, such as resin plastics, or nylon. Depending on the different inner diameters of the slip ring structure 300, different types of resin materials can be selected based on their coefficients of thermal expansion. The first component 100 and the second component 200 can be made of existing cast iron materials, allowing for a difference in the coefficients of thermal expansion between the first component 100, the second component 200, and the slip ring structure 300, thereby changing the radial position and fit of the slip ring structure 300.

[0062] Because resin-based plastic materials possess a certain degree of elasticity, they can adapt to short-term, localized contact with stationary components 100 or 200 without damage during transportation or other special circumstances. By utilizing elasto-plastic materials to create the slip ring structure 300, it can withstand short-term localized impact forces, reducing localized, irreversible wear caused by extreme working conditions, temperature overloads, installation errors, etc. The combination of materials and structure enables the slip ring structure 300 to float, fundamentally solving the problem of its susceptibility to wear.

[0063] In terms of oil supply, the oil guide channel 301 provided on the slip ring structure 300 penetrates the slip ring structure 300 itself radially. The first component 100 has a first channel 101 and the second component 200 has a second channel 201. Both the first channel 101 and the second channel 201 are connected to the oil guide channel 301, and the lubricating oil can flow in the first channel 101, the second channel 201 and the oil guide channel 301.

[0064] It is understood that the lubricating oil can flow either along the first channel 101, the oil guide channel 301 to the second channel 201, or along the second channel 201, the oil guide channel 301 to the first channel 101, depending on the actual situation. In this embodiment, the lubricating oil flows along the first channel 101, the oil guide channel 301 to the second channel 201. Figure 3 The middle arrow indicates the direction of lubricant flow.

[0065] In this embodiment, the slip ring structure 300 includes two slip ring bodies 302 spaced apart along the axial direction, forming an oil guide channel 301 between the two slip ring bodies 302. Lubricating oil can flow radially into the oil guide channel 301 at the oil inlet end and out from the oil outlet end of the oil guide channel 301. By providing two slip ring bodies 302, it is easier to process and manufacture, easier to install and disassemble, and improves the flexibility and oil supply stability of the slip ring structure 300.

[0066] In this embodiment, the opposing surfaces of the two slip ring bodies 302 are parallel to each other, which facilitates processing and production, as well as installation, and improves assembly efficiency. The opposing surfaces of the two slip ring bodies 302 refer to their opposite end faces.

[0067] Example 2

[0068] Figures 4 to 7 Embodiment 2 is shown, in which the same or corresponding components as in Embodiment 1 are represented by the same reference numerals as in Embodiment 1. For simplicity, only the differences between Embodiment 2 and Embodiment 1 are described. The difference is that the flow area at the oil outlet is smaller than that at the oil inlet. That is, within the oil guide channel 301, the flow area decreases along the flow direction of the lubricating oil. As the lubricating oil flows, the oil pressure gradually increases, resulting in a larger oil pressure at the oil outlet. This oil pressure causes the two slip ring bodies 302 to be pushed away from each other, thereby preventing the two slip ring bodies 302 from contacting and ensuring stable oil supply.

[0069] Since the two slip ring bodies 302 are independent of each other, under actual production, transportation, and different operating conditions, using the structure shown in Embodiment 1, the two slip ring bodies 302 may approach each other, causing the oil guide channel 301 to narrow or even become blocked, affecting the stability of oil supply. When the lateral dimension of the slip ring body 302 is too small, that is, when the width / height ratio of the slip ring is small, the slip ring body 302 is prone to tilting inward. A limiting structure can be used to restrict the axial tilting of the slip ring structure 300. In this embodiment, a hydraulic booster is used to limit the axial tilting of the slip ring structure 300. Specifically, the flow area of ​​the oil outlet end is set to be smaller than the flow area of ​​the oil inlet end.

[0070] It is possible, see [link / reference] Figure 4 and Figure 5 From the oil inlet end to the oil outlet end, the flow area of ​​the oil guide channel 301 gradually decreases. The cross-sectional shape of the oil guide channel 301 is trapezoidal, and this trapezoid can be... Figure 4 The right trapezoid shown can also be Figure 5The isosceles trapezoid shown, or the two walls of the oil guide channel 301 can also be curved surfaces, as long as the flow area of ​​the oil guide channel 301 gradually decreases from the oil inlet end to the oil outlet end. Even if the two slip ring bodies 302 approach each other along the axial direction, the first contact point is the oil outlet end, and it is a line contact, which makes the contact area small and easy to be separated by oil pressure impact.

[0071] Alternatively, see [link to relevant documentation]. Figure 6 and Figure 7 From the oil inlet end to the oil outlet end, the flow area of ​​the oil guide channel 301 decreases in a stepped manner, resulting in a stepped cross-section for the oil guide channel 301. If the two slip ring bodies 302 approach each other axially, the first point of contact will be the oil outlet end. Figure 6 In the middle, the oil outlet end can make surface contact. To minimize the contact area, the step at the oil outlet end can be changed to a slope, such as... Figure 7 As shown, even when the two slip ring bodies 302 are in contact along the axial direction, it is a line contact, which results in a small contact area and makes it easy to be separated by hydraulic pressure.

[0072] Example 3

[0073] Figures 8 to 14 Embodiment 3 is shown, in which components that are the same as or corresponding to those in Embodiment 2 are represented by the same reference numerals as those in Embodiment 2. For simplicity, only the differences between Embodiment 3 and Embodiment 2 are described. The difference lies in that, from the oil inlet end to the oil outlet end, the flow area of ​​the oil guide channel 301 first increases and then decreases. The portion with the increased flow area can store oil, and the stored oil has a certain oil pressure. This oil pressure causes the two slip ring bodies 302 to be subjected to a thrust that moves them away from each other, thereby preventing the two slip ring bodies 302 from contacting and ensuring stable oil supply.

[0074] Specifically, within the oil guiding channel 301, at least one slip ring body 302 has an oil reservoir 3021 recessed on its end face, located between the oil inlet and outlet ends. It is understood that the oil reservoir 3021 can store oil, causing the flow area of ​​the oil guiding channel 301 to first increase and then decrease. Both slip ring bodies 302 can have the oil reservoir 3021 recessed on their end faces, and the two oil reservoirs 3021 can be directly opposite each other or staggered.

[0075] It can be like Figures 8 to 10 As shown, from the oil inlet end to the oil outlet end, the flow area of ​​the oil guide channel 301 increases and then decreases in a stepped manner, thus forming a stepped cross-section. Alternatively, it can be as follows... Figures 11 to 13As shown, from the oil inlet end to the oil outlet end, the flow area of ​​the oil guide channel 301 increases in an arc shape and then decreases in an arc shape. At this time, the cross-sectional shape of the oil storage tank 3021 is arc-shaped, where the arc shape can be a circular arc, which can accommodate more oil and has a larger thrust.

[0076] If the two slip ring bodies 302 approach each other along the axial direction, the first part to contact is the oil outlet end, and it is a line contact, which makes the contact area small and easy to be separated by oil pressure impact.

[0077] Within the oil guiding channel 301, oil guiding walls 3011 are provided on both sides of the oil outlet, and the two oil guiding walls 3011 can make line contact. This can be as follows: Figure 13 As shown, both oil guide walls 3011 are arc-shaped convex surfaces. Even when the two slip ring bodies 302 are in axial contact, it is a line contact, resulting in a small contact area, which facilitates separation by oil pressure impact. Alternatively, it can be as follows... Figure 14 As shown, both oil guide walls 3011 are inclined surfaces along the flow direction of the lubricating oil, and the two oil guide walls 3011 are close to each other. If the two slip ring bodies 302 are close to each other axially, the first contact point is the oil outlet end, and it is a line contact, which makes the contact area small and easy to be separated by oil pressure impact.

[0078] Example 4

[0079] Figure 15 and Figure 16 Embodiment 4 is shown, in which components identical or corresponding to those in Embodiment 3 are referred to using the same reference numerals as in Embodiment 3. For simplicity, only the differences between Embodiment 4 and Embodiment 3 are described. The difference lies in that the slip ring structure 300 further includes a retainer 303, which is disposed between the two slip ring bodies 302. A portion of the retainer 303 passes through the oil reservoir 3021, and each slip ring body 302 is spaced apart from the retainer 303. The retainer 303 prevents the two slip ring bodies 302 from contacting each other, ensuring smooth oil supply. Because there is a certain gap between the retainer 303 and the slip ring body 302, an oil film can be formed, ensuring that no friction occurs between the slip ring body 302 and the retainer 303.

[0080] An oil passage 3031 is provided on the cage 303, and the oil passage 3031 is connected to the oil guide passage 301. It can be understood that the setting of the cage 303 does not affect the flow of lubricating oil between the first passage 101, the oil guide passage 301 and the second passage 201. Therefore, the position and length of the oil passage 3031 on the cage 303 can be set according to actual needs, and is generally set to extend intermittently around the circumference of the cage 303.

[0081] The cage 303 is fixedly connected to the first component 100, specifically by a pin connection.

[0082] The reason for inserting the retainer 303 into the oil reservoir 3021 is to increase the width of the retainer 303. The gap between the two slip ring bodies 302 is very small. If the retainer 303 is simply inserted into the oil guide channel 301 between the two slip ring bodies 302, then the retainer 303 will be very thin. From a dimensional perspective, it is not convenient to open the oil passage 3031, nor is it convenient to fix the retainer 303.

[0083] Example 5

[0084] Figures 17 to 20 Embodiment 5 is shown, in which components that are the same as or corresponding to those in Embodiment 1 are represented by the same reference numerals as those in Embodiment 1. For simplicity, only the differences between Embodiment 5 and Embodiment 1 are described. The difference is that, within the oil guide channel 301, at least one slip ring body 302 has a protrusion 3022 formed on its end face. One end of the protrusion 3022 is connected to one slip ring body 302, and the other end of the protrusion 3022 is spaced apart from another slip ring body 302. The protrusion 3022 prevents the two slip ring bodies 302 from contacting each other, ensuring smooth oil supply. Because the protrusion 3022 is spaced apart from the other slip ring body 302, an oil film can be formed, ensuring that no friction occurs between the slip ring body 302 and the protrusion 3022.

[0085] The outer peripheral surface of the protrusion 3022 is provided with a contact line 30221 that can form a line contact. Even if the protrusion 3022 contacts the end face of the slip ring body 302, it is a line contact, which makes the contact area small and easy to be separated by hydraulic pressure.

[0086] In this embodiment, the cross-sectional shape of the protrusion 3022 is semi-elliptical.

[0087] Specifically, the protrusions 3022 are spaced circumferentially around the slip ring body 302 to ensure that the lubricating oil can pass smoothly through the oil guide channel 301. It can be understood that, along the radial direction of the slip ring body 302, the width of the protrusions 3022 is smaller than the distance between the oil inlet end and the oil outlet end of the oil guide channel 301, so as not to affect the smooth flow of the lubricating oil.

[0088] In this embodiment, a protrusion 3022 is provided on only one slip ring body 302. In other embodiments, protrusions 3022 can be provided on both slip ring bodies 302, with the protrusions 3022 on the two slip ring bodies 302 distributed alternately to ensure balanced and uniform force distribution.

[0089] Example 6

[0090] Figures 21 to 24Embodiment Six is ​​shown, wherein components that are the same as or corresponding to those in Embodiment One are referred to using the same reference numerals as those in Embodiment One. For simplicity, only the differences between Embodiment Six and Embodiment One are described. The difference is that the slip ring structure 300 further includes a connector 304, which is disposed between the two slip ring bodies 302 and fixes the two slip ring bodies 302 together. The connector 304 prevents the two slip ring bodies 302 from contacting each other, ensuring smooth oil supply.

[0091] To ensure smooth flow of lubricating oil, channels can be created in the connector 304, or the connector 304 can be divided into several segmented intervals. Specifically, it can be as follows: Figure 22 As shown, the connector 304 includes several arc-shaped connecting portions, each arc-shaped connecting portion being spaced apart circumferentially around the slip ring body 302. Alternatively, as shown... Figure 24 As shown, the connector 304 includes several connecting posts, each of which is spaced circumferentially around the slip ring body 302.

[0092] It is understandable that, along the radial direction of the slip ring body 302, the width of the connector 304 is smaller than the distance between the oil inlet end and the oil outlet end of the oil guide channel 301, so as not to affect the smooth flow of lubricating oil. Even if the connector 304 is directly opposite the first channel 101 and the second channel 201, the lubricating oil can still flow to the connector 304 and flow away from both ends of the connector 304.

[0093] The specific dimensions of the connector 304 can be set according to actual needs, with the aim of ensuring that the two slip ring bodies 302 are connected without affecting the oil supply.

[0094] This embodiment provides a gearbox, specifically a wind turbine gearbox, including the oil supply and lubrication device from any of the above embodiments. Within the gearbox, there are a first component 100 and a second component 200 that are capable of relative rotation. Alternatively, the first component 100 may be the gearbox's shaft, and the second component 200 may be the gearbox housing. Or, the first component 100 may be the gearbox's planetary carrier, and the second component 200 may be the gearbox housing.

[0095] Applying the above-mentioned floating slip ring structure 300 to a gearbox completely differs from the traditional design concept that requires the oil supply slip ring to be fixed to one side. The slip ring structure 300 provided in this embodiment can float freely and has a relatively simple structure and long service life.

[0096] Under long-term operation, the internal temperature of the wind turbine gearbox rises to 60-70℃. At this temperature, the slip ring structure 300 has an interference fit with the second component 200 and a clearance fit with the first component 100. The rotation of the first component 100 will not interfere with the slip ring structure 300, thus eliminating the risk of wear. Therefore, the disadvantages of traditional structures are avoided, greatly improving the service life of the slip ring.

[0097] It is understandable that the above-mentioned oil supply and lubrication device is not only applicable to gearboxes, but also to other systems with rotatable parts that require internal oil supply and lubrication. The size of the slip ring structure 300 can be set according to actual needs.

[0098] This embodiment also provides an oil supply lubrication method, employing the oil supply lubrication device in any of the above embodiments, including:

[0099] During initial operation, the first component 100 and the second component 200 rotate relative to each other, and the slip ring structure 300 rotates with the first component 100, and the lubricating oil flows in the oil guide channel 301;

[0100] During operation, as the operating temperature rises, the slip ring structure 300 expands and deforms. When the operating temperature is greater than or equal to the first set value, the slip ring structure 300 is clearance-fitted with the first component 100 and interference-fitted with the second component 200.

[0101] After the work is completed, as the working temperature decreases, the slip ring structure 300 shrinks and deforms. When the working temperature is less than or equal to the second set value, the slip ring structure 300 is in an interference fit with the first component 100 and in a clearance fit with the second component 200.

[0102] Since the slip ring structure 300 can deform with temperature changes, thereby changing the fit state, the slip ring structure 300 can achieve a floating function, thus avoiding wear of the slip ring structure 300 and improving its service life.

[0103] The key parameter settings in this embodiment are as follows:

[0104] The radial deformation ΔR of the slip ring on one side is calculated according to formula (1).

[0105] ΔR=0.5*D*α*ΔT (1)

[0106] In the formula, D is the inner diameter of the slip ring structure (300 mm).

[0107] α is the coefficient of thermal expansion of the slip ring structure (300).

[0108] ΔT represents the temperature change.

[0109] Specifically, ΔT can be the difference between the working temperature during operation and the room temperature at the beginning of operation.

[0110] In this embodiment, we can substitute D = 1200mm; α = 72*10 -6 mm / ℃; ΔT=40℃, therefore ΔR is 1.73mm. Here, the coefficient of thermal expansion α refers to the change in length caused by a unit change in temperature.

[0111] The unilateral deformation ΔC of the first component 100 near the slip ring structure 300 and the second component 200 near the slip ring structure 300 can be approximately considered to be the same. The first component 100 and the second component 200 are made of metallic materials with a coefficient of thermal expansion of (10, 20)*10. -6 Between mm / ℃, according to formula (1), ΔC=0.288mm can be obtained.

[0112] Define the interference between the slip ring structure 300 and the first component 100 as Δ1, and define the clearance between the slip ring structure 300 and the second component 200 as Δ2. Preset Δ2 = 0.6mm to avoid oil leakage. When the operating temperature rises, if the value of ΔR is greater than ΔC, the slip ring structure 300 will expand and deform towards the second component 200 until it interferes with the second component 200. However, the change between the slip ring structure 300 and the first component 100 is more complex. First, the first component 100 expands unilaterally by ΔC. After the temperature rises by ΔT, the slip ring structure 300 first expands outward by 0.6mm (Δ2 value). Then, the slip ring structure 300 needs to continue expanding, but because the slip ring structure 300 is already interfered with by the second component 200, it is restricted by the second component 200 and cannot continue to expand outward. Therefore, the inner side of the slip ring structure 300 will gradually approach the first component 100, that is, it begins to expand inward, denoted as Δx.

[0113] By analyzing α = 72 * 10 in this embodiment -6 Simulation analysis was performed on the slip ring structure 300 made of material with a temperature of mm / ℃. The slip ring structure 300 expands inward by about 0.0982 mm relative to the first component 100.

[0114] To ensure a clearance fit between the slip ring structure 300 and the first component 100 during operation, a requirement must be placed on the interference fit between the slip ring structure 300 and the first component 100 during initial operation, namely:

[0115] If Δ2-(Δ1+ΔC+Δx)>0, then Δ1 needs to be less than 0.2138mm. To ensure sufficient clearance, the single-sided interference Δ1=0.1mm can be set.

[0116] The above analysis shows that within a certain time period, the slip ring structure 300 will be in a state of free rotation. That is, there is a gap between the slip ring structure 300 and the first component 100, and also a gap between the slip ring structure 300 and the second component 200. This does not affect the stability of oil supply, will not cause oil leakage, and will not result in relative wear; it is the most ideal state. The calculations also show that when setting the dimensions, clearance, and interference of the slip ring structure 300, it will not cause simultaneous interference between the slip ring structure 300 and the first component 100 and the second component 200, thus preventing wear on the slip ring structure 300.

[0117] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil supply lubricating device characterized by comprising: Includes a slip ring structure (300), which is disposed between a first component (100) and a second component (200) that are rotatable relative to each other. A portion of the first component (100) passes through the receiving cavity of the second component (200), and the slip ring structure (300) is sleeved on the first component (100) and located within the receiving cavity. The slip ring structure (300) has an oil guide channel (301), the slip ring structure (300) is interference-fitted with the first component (100), the slip ring structure (300) is clearance-fitted with the second component (200), and the slip ring structure (300) can deform with temperature changes; The coefficient of thermal expansion of the first component (100) is lower than that of the slip ring structure (300), and the coefficient of thermal expansion of the second component (200) is lower than that of the slip ring structure (300). The slip ring structure (300) is made of an elastic-plastic material. During initial operation, the first component (100) and the second component (200) rotate relative to each other, and the slip ring structure (300) rotates with the first component (100), and the lubricating oil flows in the oil guide channel (301); During operation, as the operating temperature rises, the slip ring structure (300) expands and deforms. When the operating temperature is greater than or equal to the first set value, the slip ring structure (300) is clearance-fitted with the first component (100), and the slip ring structure (300) is interference-fitted with the second component (200). After the work is completed, as the working temperature decreases, the slip ring structure (300) shrinks and deforms. When the working temperature is less than or equal to the second set value, the slip ring structure (300) is interference-fitted with the first component (100), and the slip ring structure (300) is clearance-fitted with the second component (200).

2. The oil supply lubrication device according to claim 1, characterized by The slip ring structure (300) includes two slip ring bodies (302) spaced apart along the axial direction, and the oil guide channel (301) is formed between the two slip ring bodies (302). Lubricating oil can flow radially into the oil guide channel (301) at the oil inlet end and out from the oil guide channel (301).

3. The oil supply lubrication device according to claim 2, characterized by The flow area of ​​the oil outlet is smaller than that of the oil inlet.

4. The oil supply and lubrication device according to claim 3, characterized in that, From the oil inlet end to the oil outlet end, the flow area of ​​the oil guide channel (301) gradually decreases.

5. The oil supply lubrication device according to claim 3, characterized by From the oil inlet end to the oil outlet end, the flow area of ​​the oil guide channel (301) first increases and then decreases.

6. The oil supply lubrication device according to claim 5, characterized by In the oil guide channel (301), at least one of the slip ring bodies (302) has an oil storage groove (3021) recessed on its end face, and the oil storage groove (3021) is located between the oil inlet end and the oil outlet end.

7. The oil supply lubrication device according to claim 6, characterized by Within the oil guiding channel (301), oil guiding walls (3011) are provided on both sides of the oil outlet end, and the two oil guiding walls (3011) can be in line contact.

8. A gear box characterized in that, Includes the oil supply and lubrication device as described in any one of claims 1-7.

9. The gearbox according to claim 8, characterized in that, The first component (100) is a rotating shaft of the gearbox, and the second component (200) is a box body of the gearbox.

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