Blank structure of reverse winding shaft sleeve

Abstract

A blank structure of a reverse reel sleeve comprises a flat part and two bent parts which are arranged at the two ends of the flat part in an extending mode respectively. The flat part and the bent part are of the same plate structure, and each flat part comprises a steel backing layer, a middle layer covering the steel backing layer and a coating coating the side, opposite to the steel backing layer, of the middle layer. The flat part is of a flat plate structure, and the two bent parts are located at the two ends of the flat part and bent towards the side, provided with the steel backing layer, of the flat part. According to the structure, a blank is rolled step by step through the bent parts which are rolled and formed in advance and the flat parts which are not rolled yet, and as the inner diameters of the arcs of the two bent parts are equal to the inner diameter of the manufactured shaft sleeve, the shaft sleeve can be manufactured only by rolling the flat parts, and the production efficiency of the shaft sleeve is improved. And the conditions of dislocation or fracture and the like of an interlayer structure in the blank due to large-area rolling are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shaft sleeve production, particularly to a blank structure of reverse winding shaft sleeve. BACKGROUND

[0002] With the development of industrial technology, shaft sleeves are widely used in many industries such as machinery, printing and dyeing, papermaking, chemical industry, aerospace, coal, petroleum, automobile, engineering machinery, metallurgy, etc. The shaft sleeve is generally formed by winding a plate with interlayer structure. For example, Chinese patent CN202021061430.1 discloses a bearing plate, which includes a body; the body includes a metal substrate, a copper powder layer, a polytetrafluoroethylene layer, a zinc oxide layer, and a graphene layer from bottom to top; one end face of the body has a first abutting block extending outward, and the other end face of the body has a second abutting block extending outward, and the first abutting block and the second abutting block are mutually clamped. When the bearing plate is wound into a bearing, it can be clamped, so that the gap at the clamped part will not be directly connected even if it becomes larger. However, some shaft sleeves used in large devices, such as those used in the planetary shaft part of a wind power gear box, are not suitable for this plate structure when winding. When winding, the interlayer structure on the plate is prone to misalignment or fracture. SUMMARY

[0003] Therefore, the utility model provides a blank structure of reverse winding shaft sleeve to solve the above problems.

[0004] A blank structure of reverse winding shaft sleeve includes a flat part and two curved parts respectively extending at both ends of the flat part. The flat part and the curved part are of the same plate structure, which includes a steel backing layer, an intermediate layer covering the steel backing layer, and a coating layer coated on the side of the intermediate layer away from the steel backing layer. The flat part is a flat plate structure, and the two curved parts are located at both ends of the flat part and are curved towards the side of the flat part with the steel backing layer. The inner diameter of the curved part is equal to the inner diameter of the finished shaft sleeve.

[0005] Further, the steel backing layer is located on the inner diameter surface of the shaft sleeve and is made of steel.

[0006] Further, the intermediate layer includes a transition layer covering one side of the steel backing layer and a high-tin aluminum layer covering the side of the transition layer away from the steel backing layer.

[0007] Further, the high-tin aluminum layer is a high-tin aluminum alloy.

[0008] Further, the arc length of the bending part is less than or equal to half of the length of the flat part, and the central angle of the bending part is between 70° and 90°.

[0009] Compared with the prior art, the blank structure of the reverse shaft sleeve is divided into steps by the bending part pre-formed and the flat part not yet subjected to the forming operation, since the inner diameter of the two bending parts is equal to the inner diameter of the formed shaft sleeve, only the flat part is subjected to the forming operation, so that the forming of the shaft sleeve is completed, and the dislocation or fracture of the interlayer structure of the blank is avoided. The length of the flat part subjected to the forming operation is substantially equal to the length of the bending of the two bending parts, so that the extension force of the same interlayer in the blank structure is evenly distributed during the forming operation, and the stability of the shaft sleeve is enhanced.

[0010] Most of the wind power generation sliding bearings select copper bush or directly melt copper layer on the shaft, and the biggest disadvantage is that when the resistance changes during the rotation of the blade, the fluid lubrication line of the friction surface of the shaft surface and the inner surface of the gear will be easily damaged, and the method of pre-shaping is usually used to compensate, but when the calculation data error or new conditions occur, the oil film will be damaged, and friction and wear will be easily generated. The raw material in the utility model is high-tin aluminum, and the production cost is lower than that of copper alloy. The surface of the shaft sleeve in the utility model has a self-correcting function according to the working condition, which can ensure that the shaft and the sliding shaft sleeve directly form a good oil film, realize fluid dynamic pressure movement, and prolong the service life of the shaft sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The structure of the blank structure of the reverse shaft sleeve provided by the utility model is shown in the schematic view.

[0012] Figure 2 The structure of the blank structure of the reverse shaft sleeve provided by the utility model is shown in the schematic view. Figure 1 The enlarged view of A in the middle. DETAILED DESCRIPTION

[0013] The specific embodiments of the utility model are further described below. It should be understood that the description of the embodiments of the utility model herein is not used to limit the protection scope of the utility model.

[0014] As Figure 1As shown, it is the blank structure of the reverse winding shaft sleeve structure schematic diagram provided by the utility model. The reverse winding shaft sleeve structure is applied to the planetary shaft part of the wind power generation gear box, and the reverse winding shaft sleeve structure comprises a flat part 10 and two curved parts 20 which are respectively arranged at two ends of the flat part 10. It is conceived that the reverse winding shaft sleeve structure also comprises some other functional modules, such as a rounding mechanism, a hot melting module and the like, which are known to those skilled in the art, and will not be described one by one here.

[0015] Please refer to Figure 2 It should be noted that the flat part 10 and the curved part 20 are of the same plate structure, which comprises a steel back layer 30, an intermediate layer 40 covered on the steel back layer 30 and a coating layer 50 coated on one side of the intermediate layer 40 away from the steel back layer 30. The curved direction of the curved part 20 is towards one side of the flat part 10 with the steel back layer 30, so that when the blank is made into a reverse winding shaft sleeve, the steel back layer 30 is located at the inner diameter surface of the shaft sleeve, and the coating layer 30 is located at the outer diameter surface of the shaft sleeve.

[0016] The flat part 10 is a flat plate structure, and the two curved parts 20 are located at two ends of the flat part 10 and are curved towards one side of the flat part 10 with the steel back layer 10. The inner diameter size of the arc formed by the curved part 20 is equal to the inner diameter size of the shaft sleeve after being made, so that when the winding operation is performed, only the flat part 10 needs to be wound, and after the flat part 10 is bent for multiple times, the two ends of the two curved parts 20 are mutually adhered and combined by welding, thereby completing the manufacture of the shaft sleeve, and avoiding the dislocation or fracture of the interlayer structure inside the blank due to large-area winding.

[0017] The curved part 20 is formed by winding operation, the arc length of the curved part 20 is less than or equal to half the length of the flat part 10, and the central angle of the curved part 20 is between 70°-90°, so that the length of the flat part 10 wound and the length of the two curved parts 20 bent are substantially the same, thereby dividing the extension force of the same interlayer in the blank structure.

[0018] The steel back layer 30 is mainly made of steel material, and the wear resistance of the steel material also enables the steel back layer 30 to serve as the innermost layer in the shaft sleeve structure, and the solid characteristics of the steel back layer 30 play an important supporting role for the whole shaft sleeve.

[0019] The intermediate layer 40 comprises a transition layer 41 covered on one side of the steel back layer 30 and a high tin aluminum layer 42 covered on one side of the transition layer 41 away from the steel back layer 30.

[0020] The transition layer 41 is mainly made of pure aluminum, and the pure aluminum layer has good ductility, and is arranged between the steel back layer 30 and the high-tin aluminum layer 42. The high-tin aluminum layer 42 is a high-tin aluminum alloy mainly composed of aluminum and tin, and usually further comprises other elements such as copper, nickel and the like, and the alloy has excellent wear resistance. The transition layer 41 and the high-tin aluminum layer 42 mainly play the roles of wear reduction and lubrication and self-correcting pressure bearing point.

[0021] Therefore, when the blank structure of the reverse winding shaft sleeve is manufactured, the transition layer 41 is fixed on the steel back layer 30, the high-tin aluminum layer 42 is tightly attached to the side of the transition layer 41 away from the steel back layer 30, and after rolling and annealing, the steel-aluminum composite is formed, and the bonding strength of the materials is good.

[0022] The coating layer 50 is mainly made of a polyimide polymer, which is a high polymer material with excellent wear resistance. The coating layer 50 serves as the outermost layer of the shaft sleeve, can provide protection for the intermediate layer, and can enhance the wear resistance of the shaft sleeve and prolong the service life of the shaft sleeve.

[0023] Compared with the prior art, the blank structure of the reverse winding shaft sleeve is divided into two steps, i.e., the bending part 20 is pre-formed, and the flat part 10 is not subjected to the winding operation. Since the inner diameter of the two bending parts 20 is equal to the inner diameter of the manufactured shaft sleeve, only the flat part 10 needs to be wound, so that the manufacturing of the shaft sleeve is completed, and the dislocation or fracture of the interlayer structure in the blank is avoided. The length of the flat part 10 wound is substantially equal to the length of the two bending parts 20, so that the extension force of the same interlayer in the blank structure can be evenly distributed during the winding operation, and the stability of the shaft sleeve is enhanced.

[0024] Most of the wind power generation sliding bearings select copper sleeves or directly melt copper layers on the shaft, and the biggest disadvantage is that when the resistance changes during the rotation of the wind blade, the fluid lubrication line of the friction surface of the shaft surface and the inner surface of the gear is easily damaged. The method of pre-shaping is usually used to compensate, but when the calculation data error or new conditions occur on site, the oil film is damaged, and friction and wear are easily generated. In the present application, high-tin aluminum is used as the raw material, and the production cost is lower than that of copper alloy. The surface of the shaft sleeve in the present application has a self-correcting function according to the working conditions, which can ensure that the shaft and the sliding shaft sleeve form a good oil film, realize fluid dynamic pressure movement, and prolong the service life of the shaft sleeve.

[0025] The above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement or improvement within the spirit of the present application is covered within the protection scope of the present application.

Claims

1. A blank structure for a reverse spool cover, characterized by: The blank structure of the anti-reel sleeve comprises a flat part and two curved parts respectively extending at two ends of the flat part, the flat part and the curved parts are of the same plate structure, which comprises a steel back layer, an intermediate layer covering the steel back layer, and a coating layer coated on the side of the intermediate layer away from the steel back layer, the flat part is a flat plate structure, the two curved parts are located at two ends of the flat part and are curved towards the side of the flat part with the steel back layer, and the inner diameter of the curved part is equal to the inner diameter of the finished sleeve.

2. The reverse spool sleeve blank structure according to claim 1, characterized by: The steel back layer is located on the inner diameter surface of the sleeve and is made of steel.

3. The reverse spool sleeve blank structure of claim 1, wherein: The intermediate layer comprises a transition layer covering one side of the steel back layer and a high tin aluminum layer covering the side of the transition layer away from the steel back layer.

4. The reverse spool sleeve blank structure of claim 3, wherein: The high tin aluminum layer is a high tin aluminum alloy.

5. The reverse spool sleeve blank structure of claim 1 wherein: The arc length of the curved part is less than or equal to half the length of the flat part, and the central angle of the curved part is between 70° and 90°.

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