Insulation coupling and generator set

Abstract

The utility model discloses an insulating coupler and a generator set, and relates to the technical field of couplings. The first half-coupling shaft sleeve is connected with the first end of the universal joint, and the first half-coupling shaft sleeve is connected with the driving shaft in a sleeving manner; the first insulating sleeve is used for isolating the driving shaft from the first half coupling shaft sleeve; and the second half-coupling shaft sleeve is connected with the second end of the universal joint, and the second half-coupling shaft sleeve is connected with the driven shaft in a sleeving manner. According to the insulating coupler and the generator set, the technical problems that an existing coupler cannot achieve the effects of insulation and large torque transmission at the same time, and a bearing, a gear and the like are likely to be subjected to electric corrosion are difficult to solve are solved, the driving shaft and the driven shaft are isolated through the first insulating sleeve, shaft current insulation blocking is achieved, and the power generation efficiency is improved. And meanwhile, the torque transmission capacity between the driving shaft and the transmission shaft is ensured, and reliable application of a transmission system in the whole life cycle is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to an insulating coupling and a generator set. Background Art

[0002] A coupling is a mechanical component used to securely connect the driving and driven shafts of various mechanisms, allowing them to rotate together and transmit motion and torque. It typically consists of two halves, each connected by a key or expansion fit, secured to the ends of the shafts and then joined together in some other manner. Couplings can also compensate for misalignment between the two shafts due to manufacturing and installation inaccuracies, deformation during operation, or thermal expansion. Common coupling types include diaphragm couplings, plum blossom couplings, bellows couplings, and gear couplings, each requiring different couplings for different applications. For medium- and high-speed wind turbines, the generator shaft is connected to the gearbox shaft via a coupling. The gearbox increases the speed of the rotor from low to high. Due to the use of variable frequency modulation technology in generators, the common-mode shaft currents generated by the generator can cause electrocorrosion in the generator bearings, gearbox bearings, and gears, thereby affecting the reliable operation of the generator set.

[0003] Existing insulating couplings typically use insulating plates and sleeves to insulate the bolts connecting the intermediate piece and the coupling half's sleeve flange. These bolts must perform both fastening and torque transmission functions, subjecting them to harsh and complex operating conditions. The insulating material used is organic, with limited mechanical properties, insulation performance after moisture exposure, and durability and aging resistance, which can easily lead to the risk of loosening and failure of the fastening bolts. Furthermore, as transmission systems become more powerful, the torque required to be transmitted by the coupling is substantial. Transmitting torque solely through the bolts connecting the intermediate piece and the coupling half's sleeve flange would require a larger coupling flange and the use of larger bolts to achieve both fastening and torque transmission, increasing the coupling's weight and cost.

[0004] In gear couplings, the end faces of the middle piece and the half-coupling sleeve flange are serrated. The teeth on these ends transmit the majority of the torque, while the bolts connecting the middle piece and the half-coupling sleeve flange primarily serve as a fastener, only needing to assist in transmitting a small portion of the torque. This allows the coupling to be smaller, reducing weight and cost. However, due to the serrated shape of the middle piece and the half-coupling sleeve flange, the bolts connecting these two ends cannot be insulated. Insulation can only be achieved by spraying a thin layer of ceramic coating on the shaft. This still provides some insulation against the low-frequency currents generated by the motor itself, but is less effective against the high-frequency shaft currents generated by the inverter, leaving the bearings and gears susceptible to electrical corrosion.

[0005] Therefore, an insulating coupling and a generator set are proposed to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide an insulating coupling, which solves the technical problems that the existing coupling has poor insulation effect, cannot take into account the functions of insulation and large torque transmission at the same time, and is difficult to solve the technical problems that bearings, gears, etc. are easily subject to electrical corrosion.

[0007] To achieve the above object, the utility model provides an insulating coupling, comprising:

[0008] Universal joints;

[0009] a first half coupling sleeve connected to the first end of the universal joint, wherein the first half coupling sleeve is sleeved and connected to the driving shaft for transmitting the torque of the driving shaft to the universal joint;

[0010] a second half coupling sleeve connected to the second end of the universal joint, wherein the second half coupling sleeve is sleeved and connected to the driven shaft for transmitting the torque of the universal joint to the driven shaft;

[0011] The first insulating sleeve is sleeved on the end of the driving shaft, and is used to isolate the driving shaft from the first half-coupling sleeve.

[0012] Preferably, a plurality of slots are arranged in an array on the outer peripheral side surface of the first insulating sleeve, the length of the slots is smaller than the length of the first insulating sleeve, and one end of the slots extends along the axial direction of the first insulating sleeve to the end surface of the first insulating sleeve.

[0013] Preferably, a plurality of circular holes are arranged in an array on the outer peripheral side surface of the first insulating sleeve, each of the circular holes is located at one end of one of the slots, and the diameter of the circular hole is greater than the width of the slot.

[0014] Preferably, a plurality of notches are arranged in an array on the outer peripheral side surface of the insulating sleeve, and both ends of the notches extend along the axial direction of the first insulating sleeve to the two end surfaces of the first insulating sleeve respectively.

[0015] Preferably, a plurality of slots are arranged in an array on the outer peripheral side surface of the first insulating sleeve, and the length of the slots is less than the length of the first insulating sleeve. A plurality of circular holes are arranged in an array on the outer peripheral side surface of the first insulating sleeve, and every two of the circular holes are located at the two ends of one of the slots, and the diameter of the circular hole is greater than the width of the slot.

[0016] Preferably, the outer side wall of the first half coupling sleeve is sleeved with a first tensioning disc inner sleeve, the outer side wall of the first tensioning disc inner sleeve is sleeved with a first tensioning disc, and the first tensioning disc is connected to the first tensioning disc inner sleeve via a plurality of first bolts.

[0017] Preferably, the outer side wall of the second half coupling sleeve is sleeved with a second tensioning disc inner sleeve, the outer side wall of the second tensioning disc inner sleeve is sleeved with a second tensioning disc, and the second tensioning disc is connected to the second tensioning disc inner sleeve via a plurality of second bolts.

[0018] Preferably, a first flange is integrally provided at both ends of the universal joint, a second flange is integrally provided at the first end of the first half-coupling sleeve, and a third flange is integrally provided at the first end of the second half-coupling sleeve, the first flange and the second flange are connected to each other by a plurality of first locking bolts, and the first flange and the third flange are connected to each other by a plurality of second locking bolts.

[0019] Preferably, a plurality of first teeth are arranged in an array on both end faces of the universal joint, a plurality of second teeth are arranged in an array on the end face of the first end of the first half-coupling sleeve, a plurality of third teeth are arranged in an array on the end face of the first end of the second half-coupling sleeve, and the first teeth on both end faces of the universal joint are respectively engaged with the second teeth and the third teeth.

[0020] Correspondingly, the present invention also provides a generator set, comprising the insulating coupling described in any one of the above items.

[0021] Compared to the above-mentioned background technology, the insulating coupling provided by the present invention has the following beneficial effects: by installing a first insulating sleeve between the driving shaft and the first half-coupling sleeve, the driving shaft and the first half-coupling sleeve are isolated, thereby isolating the driving shaft and the driven shaft, achieving insulation blocking of the shaft current, effectively preventing the shaft current from causing electrical corrosion to the gearbox components, and ensuring reliable operation of the transmission system throughout its life cycle. Moreover, compared with the existing insulation assembly consisting of an insulating plate and an insulating sleeve at the connecting bolts of the half-coupling sleeve and the intermediate piece, the structure is simpler and the mechanical performance is stronger. While ensuring the insulation performance, the same torque can be transmitted without increasing the coupling flange and connecting bolts, thereby greatly reducing the weight and cost of the coupling. That is, with the same size coupling flange and connecting bolts, a greater torque can be transmitted, effectively improving the torque transmission capacity between the driving shaft and the transmission shaft. On the other hand, compared with the existing gear coupling, the thickness of the first insulating sleeve is much larger than the insulating coating on the shaft, which has a stronger insulation effect on the high-frequency shaft current generated by the inverter. The overall insulation performance of the coupling is better and the insulation effect is more reliable, thereby better solving the problem of electrical corrosion of gearbox components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 A schematic cross-sectional view of an insulating coupling provided by an embodiment of the present utility model;

[0024] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0025] Figure 3 A schematic plan view of a first insulating sleeve provided in the first embodiment of the present utility model;

[0026] Figure 4 A schematic plan view of a first insulating sleeve provided in a second embodiment of the present utility model;

[0027] Figure 5 This is a schematic plan view of the first insulating sleeve provided in the third embodiment of the present utility model.

[0028] Specifically, 1-driving shaft; 2-first insulating sleeve; 3-first bolt; 4-first tensioning disc inner sleeve; 5-first tensioning disc; 6-first half coupling sleeve; 7-first locking bolt; 8-universal joint; 9-driven shaft; 10-slot; 11-round hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0031] like Figure 1 and Figure 2 As shown, in order to achieve the above purpose, the utility model provides an insulating coupling, including: a universal joint 8 and a first half coupling sleeve 6 and a second half coupling sleeve arranged at both ends of the universal joint 8.

[0032] The right end of the first half coupling sleeve 6 is connected to the left end of the universal joint 8, and the left end of the first half coupling sleeve 6 is sleeved and connected to the driving shaft 1. The left end of the second half coupling sleeve is connected to the right end of the universal joint 8, and the right end of the second half coupling sleeve is sleeved and connected to the driven shaft 9. Specifically, the driving shaft 1 is the generator shaft, and the driven shaft 9 is the gearbox shaft.

[0033] The right end portion of the driving shaft 1 is sleeved with a first insulating sleeve 2, and the outer peripheral side surface of the first insulating sleeve 2 is sleeved with a first half-coupling sleeve 6. The first insulating sleeve 2 installed between the driving shaft 1 and the first half-coupling sleeve 6 isolates the driving shaft 1 and the first half-coupling sleeve 6, thereby isolating the driving shaft 1 and the driven shaft 9, achieving shaft current insulation blocking, effectively preventing electrical corrosion of gearbox components caused by shaft current, and ensuring reliable operation of the transmission system throughout its life cycle.

[0034] In one embodiment of the present invention, a second insulating sleeve is sleeved on the left end portion of the driven shaft 9, and a second half-coupling sleeve is sleeved on the outer peripheral side of the second insulating sleeve. The second insulating sleeve installed between the driven shaft 9 and the second half-coupling sleeve isolates the driven shaft 9 and the second half-coupling sleeve, further isolating the driven shaft 9 from the driven shaft 9, thereby assisting in strengthening the insulation blocking of the shaft current.

[0035] Preferably, the materials of the first insulating sleeve 2 and the second insulating sleeve are made of alumina, zirconium oxide, silicon carbide and their composite materials. Compared with ordinary industrial ceramic materials, they have excellent compressive strength and insulation properties, and have good bending strength and fracture toughness. They can withstand the large pressure generated by the interference fit after the tensioning disk is tightened, and have a certain toughness, so as to facilitate the early processing and later use and are not easily damaged after radial deformation caused by the radial force of the inner sleeve 4 of the first tensioning disk.

[0036] It should be noted that the first insulating sleeve 2 isolates the driving shaft 1 from the first half-coupling sleeve 6, and the second insulating sleeve isolates the driven shaft 9 from the second half-coupling sleeve. Compared to an insulation assembly consisting of an insulating plate and an insulating sleeve between the half-coupling sleeve and the intermediate connecting bolt, this design offers a simpler structure and stronger mechanical performance. While maintaining insulation performance, it can transmit the same torque without increasing the coupling flange and connecting bolts, effectively reducing the weight and cost of the coupling. In other words, with the same coupling flange and connecting bolts, it can transmit greater torque, improving torque transmission between the driving shaft 1 and the driven shaft 9 and effectively ensuring the torque transmission capacity between the driving shaft 1 and the transmission shaft. Furthermore, compared to existing gear couplings, the thickness of the first insulating sleeve 2 is much greater than the insulating coating on the shaft, providing a stronger insulation effect against the high-frequency shaft currents generated by the inverter, improving the overall insulation performance of the coupling, and thus better addressing the problem of electrical corrosion of gearbox components. On the other hand, by improving the overall insulation performance of the coupling, mutual interference between the shaft voltage and / or shaft current test data of the two generators can be effectively avoided during the load-drag type test of the two generators, thereby ensuring the reliability of the test data.

[0037] In one embodiment of the present invention, the outer side wall of the first half coupling sleeve 6 is sleeved with the first tensioning disc inner sleeve 4, that is, the first tensioning disc inner sleeve 4 is coaxially arranged on the circumferential outside of the first half coupling sleeve 6, and the inner side wall of the first tensioning disc inner sleeve 4 fits the outer side wall of the first half coupling sleeve 6. At the same time, the first tensioning disc 5 is sleeved on the outer side wall of the first tensioning disc inner sleeve 4, and the first tensioning disc 5 is connected to the first tensioning disc inner sleeve 4 through a plurality of first bolts 3. Specifically, a fourth flange is integrally provided on the left end portion of the first tensioning disc inner sleeve 4, and a plurality of first through holes are provided at equal angles on the end surface of the fourth flange, and a plurality of first bolt 3 holes are provided at equal angles on the left end surface of the first tensioning disc 5. The plurality of first bolts 3 respectively pass through the corresponding first through holes to connect the first bolt 3 holes, that is, the first tensioning disc inner sleeve 4 and the first tensioning disc 5 are connected.

[0038] It should be noted that a first tapered surface is provided on the outer wall of the first tensioning disc inner sleeve 4, and a second tapered surface is provided on the inner wall of the first tensioning disc 5, with the first tapered surface being aligned with the second tapered surface. During use, the first tensioning disc 5 is first sleeved onto the first coupling sleeve half 6, then pushed further toward the right end of the first coupling sleeve half 6. The first tensioning disc inner sleeve 4 is then sleeved onto the first coupling sleeve half 6, allowing the first tensioning disc inner sleeve 4 to be positioned circumferentially outward of the first insulating sleeve 2. The first bolt 3 is then tightened forward, gradually approaching the first tensioning disc 5 toward the fourth flange. This gradually increases the squeezing force exerted by the first tensioning disc 5 on the first tensioning disc inner sleeve 4, which in turn exerts radial squeezing force on the first insulating sleeve 2. The radial force exerted by the first tensioning disc inner sleeve 4 causes the first insulating sleeve 2 to deform radially and become fixed to the end of the drive shaft 1.

[0039] Preferably, a positioning groove is provided on the left end face of the first tensioning disc 5. Preferably, the positioning groove is in a ring shape as a whole. When the first tensioning disc 5 gradually approaches the fourth flange, the positioning groove can accommodate the fourth flange, so that the first tensioning disc 5 further squeezes the first tensioning disc inner sleeve 4, thereby increasing the radial extrusion force of the first tensioning disc inner sleeve 4 on the first insulating sleeve 2, and further enhancing the stability of torque transmission between the driving shaft 1 and the transmission shaft.

[0040] Furthermore, a second tensioning disc inner sleeve is sleeved onto the outer wall of the second coupling half's sleeve, and a second tensioning disc is sleeved onto the outer wall of the second tensioning disc inner sleeve. The second tensioning disc is connected to the second tensioning disc inner sleeve via a plurality of second bolts. The first coupling half's sleeve 6 and the second coupling half have the same structure, and the first tensioning disc inner sleeve 4 and the second tensioning disc inner sleeve have the same structure and similar functions, so detailed description is omitted.

[0041] In one embodiment of the present invention, first flanges are integrally provided at both ends of the universal joint 8, a second flange is integrally provided at the right end of the first coupling sleeve half 6, and a third flange is integrally provided at the left end of the second coupling sleeve half. Specifically, the first and second flanges are interconnected by a plurality of first locking bolts 7. Specifically, the first locking bolts 7 provide a fastening between the first coupling sleeve half 6 and the universal joint 8, while the second locking bolts provide a fastening between the second coupling sleeve half and the universal joint 8.

[0042] Correspondingly, a plurality of first teeth are arranged in an array on both end surfaces of universal joint 8, a plurality of second teeth are arranged in an array on the end surface of the first end of the first half coupling sleeve 6, and a plurality of third teeth are arranged in an array on the end surface of the first end of the second half coupling sleeve. The first teeth on both end surfaces of universal joint 8 mesh with the second and third teeth, respectively. The meshing of the first and second teeth provides torque transmission between the first half coupling sleeve 6 and universal joint 8, while the meshing of the first and third teeth provides torque transmission between the second half coupling sleeve and universal joint 8.

[0043] In one embodiment of the present invention, a plurality of notches 10 are arranged in an array on the outer circumferential side surface of the first insulating sleeve 2. The number of notches 10 is multiple, preferably three, and the length of each notch 10 is less than the length of the first insulating sleeve 2. One end of each notch 10 extends along the axis of the first insulating sleeve 2 to the end surface of the first insulating sleeve 2. Due to the plurality of notches 10 arranged in an array on the outer circumferential side surface of the first insulating sleeve 2, when the first half coupling sleeve 6 undergoes radial deformation, the outer circumference of the first insulating sleeve 2 and the inner bore of the first half coupling sleeve 6 achieve an interference fit, which can further radially squeeze the first insulating sleeve 2 to cause it to undergo a certain degree of radial deformation, thereby achieving an interference fit between the outer circumference of the driving shaft 1 and the inner bore of the first insulating sleeve 2.

[0044] Specifically, after the first bolt 3 connects and tightens the first tensioning disc 5, the first half-coupling sleeve 6 and the first insulating sleeve 2 can both undergo a certain degree of radial deformation. At this time, the first ceramic sleeve and the inner bore of the first half-coupling sleeve 6 form an interference fit, and the outer diameter of the driving shaft 1 and the inner bore of the ceramic sleeve also form an interference fit, thereby improving the overall torque transmission effect of the coupling. Furthermore, the length of the notch 10 is greater than the length of the connecting mating surface between the driving shaft 1 and the first half-coupling sleeve 6, to ensure that after the first ceramic sleeve undergoes radial deformation, the length of the connecting mating surface between the first ceramic sleeve and the driving shaft 1 is not less than the length of the connecting mating surface between the driving shaft 1 and the first half-coupling sleeve 6, further improving the overall torque transmission effect of the coupling.

[0045] like Figure 3As shown, in the first embodiment of the present invention, a plurality of circular holes 11 are arranged in an array on the outer peripheral side surface of the first insulating sleeve 2. Each circular hole 11 is located at one end of a notch 10, and the diameter of the circular hole 11 is greater than the width of the notch 10. When processing the notch 10, a circular hole 11 is first processed at the end position of the notch 10. The diameter of the circular hole 11 is greater than the width of the notch 10. Then, the notch 10 is processed along the axial direction of the first insulating sleeve 2 by milling or wire cutting. The notch 10 is connected and connected with the circular hole 11. On the one hand, the priority processing of a circular hole 11 at the end position of the notch 10 can prevent stress concentration from occurring after the end of the notch 10 is compressed, reduce the crack resistance of the end of the notch 10, and thus improve the overall stress strength of the first insulating sleeve 2. On the other hand, the provision of the circular hole 11 can reduce the difficulty of processing the notch 10.

[0046] like Figure 4 As shown, in the second embodiment of the present invention, a plurality of circular holes 11 are arranged in an array on the outer circumferential side surface of the first insulating sleeve 2, with each two circular holes 11 being located at the two ends of a notch 10, and the diameter of the circular hole 11 being greater than the width of the notch 10. When machining the notch 10, a circular hole 11 is first machined at each end of the notch 10, with the diameter of the circular hole 11 being greater than the width of the notch 10. Then, the notch 10 is machined along the axis of the first insulating sleeve 2 by milling or wire cutting, and the notch 10 is connected and penetrated with the two circular holes 11.

[0047] like Figure 5 As shown, in the third embodiment of the present invention, a plurality of notches 10 are arranged in an array on the outer peripheral side surface of the first insulating sleeve 2, and the two ends of the notches 10 extend to the two end surfaces of the first insulating sleeve 2 along the axial direction of the first insulating sleeve 2 respectively. Specifically, the notches 10 completely penetrate the first insulating sleeve 2 along the axial direction of the first insulating sleeve 2, and the first insulating sleeve 2 is decomposed into several tiles, which are jointly attached to the outer peripheral side surface of the driving shaft 1, and can further enhance the radial deformation ability of the first insulating sleeve 2, so that the interference fit between the outer circle of the driving shaft 1 and the inner hole of the first insulating sleeve 2 is more sufficient, thereby improving the torque transmission ability between the driving shaft 1 and the transmission shaft.

[0048] Preferably, when the slot 10 completely penetrates the first insulating sleeve 2 along the axial direction of the first insulating sleeve 2, in the process of opening the slot 10 on the outer peripheral side of the first insulating sleeve 2, the slot position is filled with insulating glue while the slot is being opened, and several tiles are bonded together by the insulating glue, which ensures a more sufficient interference fit between the outer circle of the active shaft 1 and the inner hole of the first insulating sleeve 2, and facilitates the later installation of the first insulating sleeve 2 on the end of the active shaft 1.

[0049] Preferably, a plurality of strip-shaped protrusions are provided on the outer peripheral side surface of one end of the driving shaft 1. The strip-shaped protrusions are integrally formed with the driving shaft 1, and the strip-shaped protrusions extend a certain length along the axial direction of the driving shaft 1. Each strip-shaped protrusion corresponds to a notch 10. When the outer circle of the driving shaft 1 and the inner hole of the first insulating sleeve 2 are interference fit, the strip-shaped protrusions cooperate with the notches 10, which can further avoid slipping in the mating connection part between the driving shaft 1 and the first insulating sleeve 2, thereby improving the stability of the overall torque transmission of the coupling.

[0050] It should be noted that the wall thickness of the first insulating sleeve 2 can be set arbitrarily according to needs, on the basis of ensuring good insulation effect and not easy to deform during processing, and taking comprehensive consideration of cost, the main purpose is to completely isolate the shaft current circuit and avoid electrical corrosion of the gearbox bearings and gears.

[0051] When the utility model is used, the first locking bolt 7 connects the first half coupling sleeve 6 and the universal joint 8, the second locking bolt connects the second half coupling sleeve and the universal joint 8, the two end faces of the universal joint 8 respectively mesh with the right end face of the first half coupling sleeve 6 and the left end face of the second half coupling sleeve, the first insulating sleeve 2 is sleeved on the right end portion of the driving shaft 1, the first half coupling sleeve 6 is sleeved on the outer peripheral side of the first insulating sleeve 2, the first tensioning plate 5 and the first tensioning plate inner sleeve 4 are sequentially sleeved on the left end portion of the first half coupling sleeve 6, the first bolt 3 is screwed forward, and the first tensioning plate 5 gradually moves toward the fourth direction. As the blue disc approaches, the first tensioning disc 5 will gradually increase the radial extrusion pressure on the first tensioning disc inner sleeve 4. The first tensioning disc inner sleeve 4 provides radial extrusion pressure to the first insulating sleeve 2. The first insulating sleeve 2 is radially deformed by the radial force of the first tensioning disc inner sleeve 4 and is fixed to the end of the driving shaft 1 until the outer circle of the first insulating sleeve 2 and the inner hole of the half-coupling sleeve are interference fit. The outer circle of the driving shaft 1 and the inner hole of the first insulating sleeve 2 are interference fit. The connection method between the second half-coupling sleeve and the driven shaft 9 is the same as the connection method between the first half-coupling sleeve 6 and the driving shaft 1, and the assembly of the coupling is completed.

[0052] In summary, by installing the first insulating sleeve 2 between the driving shaft 1 and the first half-coupling sleeve 6 and the second insulating sleeve between the driven shaft 9 and the second half-coupling sleeve, the driving shaft 1 and the driven shaft 9 are isolated, the shaft current is insulated and blocked, and the electrical corrosion of the gearbox components by the shaft current is effectively prevented. At the same time, the torque transmission capacity between the driving shaft 1 and the transmission shaft is ensured, thereby ensuring the reliable operation of the transmission system throughout its life cycle.

[0053] In addition to the above-mentioned insulating coupling, the present invention also provides a generator set including the insulating coupling disclosed in the above-mentioned embodiment. For the structures of other parts of the generator set, please refer to the prior art and will not be described in detail herein.

[0054] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0055] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. An insulating coupling, characterized in that: include: Universal joints; a first half coupling sleeve connected to the first end of the universal joint, wherein the first half coupling sleeve is sleeved and connected to the driving shaft for transmitting the torque of the driving shaft to the universal joint; a second half coupling sleeve connected to the second end of the universal joint, wherein the second half coupling sleeve is sleeved and connected to the driven shaft for transmitting the torque of the universal joint to the driven shaft; The first insulating sleeve is sleeved on the end of the driving shaft, and is used to isolate the driving shaft from the first half-coupling sleeve.

2. The insulating coupling according to claim 1, characterized in that: A plurality of slots are arranged in an array on the outer peripheral side surface of the first insulating sleeve. The length of the slots is smaller than the length of the first insulating sleeve, and one end of the slots extends along the axial direction of the first insulating sleeve to the end surface of the first insulating sleeve.

3. The insulating coupling according to claim 2, characterized in that: A plurality of circular holes are arranged in an array on the outer peripheral side surface of the first insulating sleeve, each of the circular holes is located at one end of one of the slots, and the diameter of the circular hole is greater than the width of the slot.

4. The insulating coupling according to claim 1, characterized in that: A plurality of notches are arranged in an array on the outer peripheral side surface of the insulating sleeve, and both ends of the notches extend along the axial direction of the first insulating sleeve to the two end surfaces of the first insulating sleeve respectively.

5. The insulating coupling according to claim 1, characterized in that: A plurality of notches are arranged in an array on the outer peripheral side surface of the first insulating sleeve, and the length of the notches is less than the length of the first insulating sleeve. A plurality of circular holes are arranged in an array on the outer peripheral side surface of the first insulating sleeve, and every two of the circular holes are located at the two ends of a notch, and the diameter of the circular hole is greater than the width of the notch.

6. An insulating coupling according to any one of claims 1 to 5, characterized in that: The outer side wall of the first half coupling shaft sleeve is sleeved with a first tensioning disc inner sleeve, and the outer side wall of the first tensioning disc inner sleeve is sleeved with a first tensioning disc. The first tensioning disc is connected to the first tensioning disc inner sleeve via a plurality of first bolts.

7. The insulating coupling according to claim 6, characterized in that: The outer side wall of the second half coupling shaft sleeve is sleeved with a second tensioning disc inner sleeve, the outer side wall of the second tensioning disc inner sleeve is sleeved with a second tensioning disc, and the second tensioning disc is connected to the second tensioning disc inner sleeve via a plurality of second bolts.

8. The insulating coupling according to claim 1, characterized in that: A first flange is integrally provided at both ends of the universal joint, a second flange is integrally provided at the first end of the first half-coupling sleeve, and a third flange is integrally provided at the first end of the second half-coupling sleeve. The first flange and the second flange are connected to each other by a plurality of first locking bolts, and the first flange and the third flange are connected to each other by a plurality of second locking bolts.

9. The insulating coupling according to claim 8, characterized in that: A plurality of first teeth are arranged in an array on both end faces of the universal joint, a plurality of second teeth are arranged in an array on the end face of the first end of the first half-coupling sleeve, a plurality of third teeth are arranged in an array on the end face of the first end of the second half-coupling sleeve, and the first teeth on the two end faces of the universal joint are respectively meshed and connected with the second teeth and the third teeth.

10. A generator set, characterized in that: The insulating coupling comprises the insulating coupling according to any one of claims 1 to 9.

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