A rotary joint for wind power generation equipment

Abstract

The present invention provides a rotary joint for wind power generation equipment, comprising a shell and a rotating shaft installed in the shell, the shell is provided with a first oil channel, the rotating shaft is provided with a second oil channel, the rotary joint also comprises a sealing ring, the sealing ring is floatingly installed between the shell and the rotating shaft, the outer wall of the sealing ring is sealed and connected with the inner hole of the shell; the inner hole of the sealing ring is sealed and connected with the outer wall of the rotating shaft, the sealing ring is provided with a third oil channel, and the sealing ring is floatingly installed between the shell and the rotating shaft, so that the sealing performance of the rotary joint is greatly improved, and the oil leakage is reduced, so that the sealing ring and the shell form an oil film during operation, and the sealing ring and the rotating shaft also form an oil film, and when the rotating shaft rotates in the sealing ring, the sealing ring can make a slight position adjustment under the action of the tension of the two layers of oil films to cooperate with the rotation of the rotating shaft, thereby avoiding the occurrence of the sealing ring and the rotating shaft biting phenomenon.

Description

Technical Field

[0001] The invention relates to the field of wind power generation production and manufacturing, and in particular to a rotary joint for wind power generation equipment. Background Art

[0002] In wind turbines, it is often necessary to transport media to rotating equipment, so a special rotating joint is required at the connection between the rotating pipe and the fixed pipe.

[0003] In the prior art, a rotary joint is generally composed of a rotating shaft and a housing, and has poor sealing performance and a large amount of oil leakage. The sealing performance is generally improved by reducing the gap between the rotating shaft and the housing. However, reducing the gap between the rotating shaft and the housing will increase the difficulty of processing. Insufficient processing accuracy will cause the rotating shaft and the housing to bite during rotation. At present, China cannot produce rotary joints that meet this accuracy, and the price of such rotary joints in the international market is relatively high. Summary of the invention

[0004] The technical problem to be solved by the present invention is that in the prior art, a rotary joint is generally composed of a rotating shaft and a shell, has poor sealing performance and a large amount of oil leakage. The sealing performance is generally improved by reducing the gap between the rotating shaft and the shell. However, reducing the gap between the rotating shaft and the shell will increase the difficulty of processing, and insufficient processing accuracy will cause the rotating shaft and the shell to bite during rotation. The present invention provides a rotary joint for wind power generation equipment to solve the above problems.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a rotary joint for wind power generation equipment, including a shell and a rotating shaft installed in the shell, the shell is provided with a first oil channel, the rotating shaft is provided with a second oil channel, the rotary joint also includes a sealing ring, the sealing ring is floatingly installed between the shell and the rotating shaft, the outer wall of the sealing ring is sealed and connected to the inner hole of the shell; the inner hole of the sealing ring is sealed and connected to the outer wall of the rotating shaft, the sealing ring is provided with a third oil channel, the first oil channel and the second oil channel are connected through the third oil channel.

[0006] Further: the third oil channel includes an oil channel interface, a first oil groove and a second oil groove, the first oil groove is circumferentially arranged on the outer wall of the sealing ring, the second oil groove is circumferentially arranged on the inner wall of the sealing ring, and the oil channel interface is radially arranged on the sealing ring and connects the first oil groove and the second oil groove.

[0007] Furthermore: sealing mechanisms are provided on the inner wall of the shell on both sides of the first oil groove.

[0008] Furthermore: the sealing mechanism includes two sealing grooves, both of which are circumferentially arranged on the inner wall of the shell and arranged sequentially along the axial direction of the shell, and a sealing ring is arranged in the sealing groove, and the sealing ring is in sealing contact with the sealing ring.

[0009] Furthermore: in the sealing mechanism, an O-ring is arranged in the sealing groove close to the first oil groove; and a Glyd ring is arranged in the sealing groove far from the first oil groove.

[0010] Furthermore, bearings are respectively arranged on the left and right sides of the sealing ring in the housing, the outer ring of the bearing fits with the inner hole of the housing, and the inner ring of the bearing fits with the outer wall of the rotating shaft.

[0011] Furthermore:: an oil leakage channel is arranged on the shell, and the oil leakage channel is located on both sides of the sealing ring and is connected with the inner hole wall of the shell.

[0012] The beneficial effect of the present invention is that the sealing performance of the rotary joint for wind power generation equipment of the present invention is greatly improved by floatingly installing a sealing ring between the shell and the rotating shaft, and the oil leakage is reduced, so that an oil film is formed between the sealing ring and the shell during operation, and an oil film is also formed between the sealing ring and the rotating shaft. When the rotating shaft rotates in the sealing ring, the sealing ring can make slight position adjustments under the action of the tension of the two layers of oil films to cooperate with the rotation of the rotating shaft, thereby avoiding the occurrence of biting between the sealing ring and the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural schematic diagram of a rotary joint for wind power generation equipment of the present invention;

[0015] Figure 2 It is a structural schematic diagram of the oil leakage channel;

[0016] Figure 3 Schematic diagram of the sealing mechanism.

[0017] In the figure, 1, housing, 2, rotating shaft, 3, first oil channel, 4, second oil channel, 5, sealing ring, 6, oil channel interface, 7, first oil groove, 8, second oil groove, 9, O-ring, 10, Glyd ring, 11, bearing, 12, oil drain channel, 13, sealing groove. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limitations of the present invention. On the contrary, embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0019] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0021] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0022] like Figure 1As shown, the present invention provides a rotary joint for wind power generation equipment, comprising a shell 1 and a rotating shaft 2 installed in the shell 1, the shell 1 is provided with a first oil passage 3, the rotating shaft 2 is provided with a second oil passage 4, the rotary joint further comprises a sealing ring 5, the sealing ring 5 is floatingly installed between the shell 1 and the rotating shaft 2, the outer wall of the sealing ring 5 is sealed and connected with the inner hole of the shell 1; the inner hole of the sealing ring 5 is sealed and connected with the outer wall of the rotating shaft 2, the sealing ring 5 is provided with a third oil passage, the first oil passage 3 and the second oil passage 4 are connected through the third oil passage.

[0023] During operation, the sealing ring 5 is installed in a floating manner between the housing 1 and the rotating shaft 2. An oil film is formed between the sealing ring 5 and the housing 1, and an oil film is also formed between the sealing ring 5 and the rotating shaft 2. The sealing ring 5 can make slight adjustments under the tension of the two oil films, thereby achieving the purpose of cooperating with the rotation of the rotating shaft 2 and avoiding the phenomenon of the sealing ring 5 and the rotating shaft 2 biting. In addition, the sealing ring is shorter than the housing, which is easier to process and ensure accuracy.

[0024] The third oil channel includes an oil channel interface 6, a first oil groove 7 and a second oil groove 8. The first oil groove 7 is circumferentially arranged on the outer wall of the sealing ring 5, and the second oil groove 8 is circumferentially arranged on the inner wall of the sealing ring 5. The oil channel interface 6 is radially arranged on the sealing ring 5 and connects the first oil groove 7 and the second oil groove 8. By arranging the oil channel interface 6 and the oil groove on the sealing ring 5, the first oil channel 3 and the second oil channel 4 can be better connected and easier to process.

[0025] Combination Figure 2 and Figure 3 As shown, a sealing mechanism is provided on the inner wall of the housing 1 on both sides of the first oil groove 7, and the sealing mechanism includes a sealing groove 13. The number of the sealing grooves 13 is two, and the two sealing grooves 13 are both circumferentially arranged on the inner wall of the housing 1 and arranged sequentially along the axial direction of the housing 1. A sealing ring is provided in the sealing groove 13, and the sealing ring is in sealing contact with the sealing ring 5.

[0026] In the sealing mechanism, an O-ring 9 is arranged in the sealing groove 13 close to the first oil groove 7; a grid ring 10 is arranged in the sealing groove 13 away from the first oil groove 7. This sealing mechanism can ensure that the various parts of the rotary joint are isolated and independent from each other when the rotary joint is working, can play a dust-proof role, prevent solid particles from entering the rotary joint to accelerate the wear of the rotary joint, and improve the service life of the product.

[0027] In the housing 1, bearings 11 are respectively arranged on the left and right sides of the sealing ring 5, the outer ring of the bearing 11 fits with the inner hole of the housing 1, and the inner ring of the bearing 11 fits with the outer wall of the rotating shaft 2. By arranging the bearings 11 on both sides of the sealing ring 5, it is avoided that the weight of the rotating shaft 2 is completely borne by the sealing ring 5. At the same time, the bearings 11 support and connect the housing 1 and the rotating shaft 2, thereby ensuring the stability of the rotating shaft 2 during rotation, further avoiding the occurrence of biting between the rotating shaft 2 and the sealing ring 5, and improving the service life of the product.

[0028] The shell 1 is provided with an oil drain channel 12, which is located on both sides of the sealing ring 5 and is communicated with the inner hole wall of the shell 1. Since there is a certain gap between the rotating shaft 2, the sealing ring 5 and the shell 1, oil leakage cannot be avoided. The oil drain channel 12 can effectively discharge excess oil out of the product, thereby ensuring the stability and service life of the product.

[0029] The normal operating speed of the rotary joint is 0rpm-20rpm, the maximum speed is 24rpm, the working pressure of the oil channel is ≦25bar, and the back pressure of the pressure relief channel 12 is ﹤2bar.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0031] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A rotary joint for a wind power generation device, comprising a housing (1) and a rotating shaft (2) installed in the housing (1), the housing (1) being provided with a first oil passage (3), the rotating shaft (2) being provided with a second oil passage (4), characterized in that: The rotary joint further comprises a sealing ring (5), the sealing ring (5) being floatingly mounted between the housing (1) and the rotating shaft (2), the outer wall of the sealing ring (5) being sealingly connected to the inner hole of the housing (1); the inner hole of the sealing ring (5) being sealingly connected to the outer wall of the rotating shaft (2), the sealing ring (5) being provided with a third oil passage, the first oil passage (3) and the second oil passage (4) being connected via the third oil passage; The third oil channel comprises an oil channel interface (6), a first oil groove (7) and a second oil groove (8), the first oil groove (7) being arranged circumferentially on the outer wall of the sealing ring (5), the second oil groove (8) being arranged circumferentially on the inner wall of the sealing ring (5), the oil channel interface (6) being arranged radially on the sealing ring (5) and communicating with the first oil groove (7) and the second oil groove (8); Sealing mechanisms are provided on the inner wall of the housing (1) and on both sides of the first oil groove (7); The housing (1) is provided with an oil leakage channel (12), the oil leakage channel (12) being located on both sides of the sealing ring (5) and being connected to the inner hole wall of the housing (1).

2. A rotary joint for wind power generation equipment according to claim 1, characterized in that: The sealing mechanism comprises a sealing groove (13), the number of the sealing grooves (13) being two, the two sealing grooves (13) being arranged on the inner wall of the housing (1) along the circumferential direction and arranged in sequence along the axial direction of the housing (1), a sealing ring being arranged in the sealing groove (13), the sealing ring being in sealing contact with the sealing ring (5).

3. A rotary joint for wind power generation equipment according to claim 2, characterized in that: In the sealing mechanism, an O-ring (9) is arranged in the sealing groove (13) close to the first oil groove (7); and a Glyd ring (10) is arranged in the sealing groove (13) away from the first oil groove (7).

4. A rotary joint for wind power generation equipment according to claim 1, characterized in that: Bearings (11) are respectively arranged in the housing (1) on the left and right sides of the sealing ring (5); the outer ring of the bearing (11) fits in the inner hole of the housing (1); and the inner ring of the bearing (11) fits in the outer wall of the rotating shaft (2).

Images