Insulation coupling and generator set

Abstract

The invention 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 it is difficult to solve the problem that a bearing, a gear and the like are likely to be subjected to electrocorrosion are solved, the driving shaft and the driven shaft are isolated through the first insulating sleeve, shaft current insulation blocking is achieved, and the service life is prolonged. 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 invention relates to the technical field of couplings, and in particular to an insulating coupling and a generator set. Background Art

[0002] The coupling is a mechanical component used to firmly connect the driving shaft and the driven shaft in different mechanisms to rotate together and transmit motion and torque. It is usually composed of two halves, which are connected by keys or expansion fits, fastened to the two ends of the shaft, and then connected in some way. The coupling can also compensate for the offset between the two shafts due to inaccurate manufacturing and installation, deformation during operation or thermal expansion. Common coupling types include diaphragm couplings, plum blossom couplings, bellows couplings, gear couplings, etc., and the requirements for couplings are different for different applications. For medium and high-speed wind turbines, the generator shaft is connected to the gearbox shaft through a coupling, and the low speed of the wind wheel is converted to a high speed of the generator through the gearbox speed increase. Due to the use of generator variable frequency modulation technology, the common mode shaft current generated by the generator will cause electrical corrosion to the generator bearings, gearbox bearings and gears, thereby affecting the reliable operation of the generator set.

[0003] Existing insulating couplings basically use insulating plates and insulating sleeves to achieve insulation at the connection bolts between the middle piece and the half-coupling sleeve flange. The connection bolts here have to play a role of both tightening and torque transmission. The operating conditions are very harsh and complex. The insulating material is an organic material with average mechanical properties. The insulation performance and durable aging performance after being damp are generally poor, which easily leads to the risk of loosening and failure of the fastening bolts. Moreover, with the high-power transmission system, the torque that the coupling needs to transmit is very large. If the torque is only transmitted through the middle piece and the half-coupling sleeve flange connection bolts, the coupling flange needs to be made very large and larger bolts need to be used to achieve tightening and torque transmission, resulting in an increase in the weight and cost of the coupling.

[0004] The gear coupling makes the middle piece end face and the half-coupling shaft sleeve flange end face into a sawtooth shape, and transmits most of the torque through the middle piece end face and the half-coupling shaft sleeve flange end face teeth, while the middle piece and the half-coupling shaft sleeve flange connecting bolts mainly play a tightening role, and only need to assist in transmitting a small part of the torque, so that the coupling can be made smaller, and the weight and cost are reduced. However, since the middle piece end face and the half-coupling shaft sleeve flange end face of the gear coupling are sawtooth-shaped, it is impossible to insulate the middle piece and the half-coupling shaft sleeve flange connecting bolts. The insulation effect can only be achieved by spraying a thin layer of ceramic coating on the shaft. This still has a certain insulation effect on the low-frequency current generated by the motor itself, but the insulation effect on the high-frequency shaft current generated by the inverter is very poor, and the bearings and gears are still very susceptible to electrical corrosion.

[0005] Therefore, an insulating coupling and a generator set are proposed to solve the above problems. Summary of the invention

[0006] The purpose of the present invention 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 present invention provides an insulating coupling, comprising:

[0008] Universal joints;

[0009] A first half coupling sleeve is connected to the first end of the universal joint, wherein the first half coupling sleeve is sleeve-connected to the driving shaft and is used to transmit the torque of the driving shaft to the universal joint;

[0010] A second half coupling sleeve is connected to the second end of the universal joint, and the second half coupling sleeve is sleeve-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 two 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 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 respectively located at the two ends of a notch, and the diameter of the circular hole is greater than the width of the notch.

[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, 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 surfaces of the universal joint, a plurality of second teeth are arranged in an array on the end surface of the first end of the first half-coupling sleeve, a plurality of third teeth are arranged in an array on the end surface of the first end of the second half-coupling sleeve, and the first teeth on the two end surfaces of the universal joint are respectively meshed and connected 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 with the above background technology, the insulating coupling provided by the present invention has the following beneficial effects: by installing the 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 corroding the gearbox components, and ensuring the reliable operation of the transmission system throughout its life cycle. Moreover, compared with the existing insulating assembly composed of an insulating plate and an insulating sleeve at the half-coupling sleeve and the intermediate connecting bolt, the structure is simpler and the mechanical properties are stronger. While ensuring the insulation performance, the same torque does not need to be increased in the coupling flange and the connecting bolts, thereby reducing the weight and cost of the coupling. That is, with the same size of the coupling flange and the connecting bolts, a larger 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 greater 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] FIG1 is a cross-sectional schematic diagram of an insulating coupling provided by an embodiment of the present invention;

[0024] FIG2 is an enlarged schematic diagram of point A in FIG1 ;

[0025] FIG3 is a schematic plan view of a first insulating sleeve provided by a first embodiment of the present invention;

[0026] FIG4 is a schematic plan view of a first insulating sleeve provided in a second embodiment of the present invention;

[0027] FIG5 is a schematic plan view of a first insulating sleeve provided in a third embodiment of the present invention.

[0028] Specifically, 1-driving shaft; 2-first insulating sleeve; 3-first bolt; 4-first tensioning plate inner sleeve; 5-first tensioning plate; 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 described embodiments 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 creative work are within the scope of protection of the present invention.

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

[0031] As shown in FIG. 1 and FIG. 2 , to achieve the above-mentioned purpose, the present invention provides an insulating coupling, comprising: 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 sleeve-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 sleeve-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 of the driving shaft 1 is sleeved with a first insulating sleeve 2, and the outer peripheral side of the first insulating sleeve 2 is sleeved with a first half-coupling sleeve 6. The driving shaft 1 and the first half-coupling sleeve 6 are isolated by installing the first insulating sleeve 2 between the driving shaft 1 and the first half-coupling sleeve 6, thereby isolating the driving shaft 1 and the driven shaft 9, thereby achieving shaft current insulation blocking, effectively preventing electrical corrosion of gear box components 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 driven shaft 9 and the second half-coupling sleeve are isolated by installing the second insulating sleeve between the driven shaft 9 and the second half-coupling sleeve, and the driven shaft 9 and the driven shaft 9 are further isolated, thereby assisting in strengthening the insulation blocking of the shaft current.

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

[0036] It should be noted that the first insulating sleeve 2 is used to isolate the driving shaft 1 from the first half coupling sleeve 6, and the second insulating sleeve is used to isolate the driven shaft 9 from the second half coupling sleeve. Compared with the insulating assembly composed of an insulating plate and an insulating sleeve at the half coupling sleeve and the intermediate connecting bolt, the structure is simpler and the mechanical performance is stronger. While ensuring the insulation performance, the same torque does not need to be increased when transmitting the same amount of torque, which effectively reduces the weight and cost of the coupling. That is, under the condition of the same size of coupling flange and connecting bolts, a larger torque can be transmitted, and the torque transmission effect between the driving shaft 1 and the driven shaft 9 is better, which effectively ensures the torque transmission capacity between the driving shaft 1 and the transmission shaft. Moreover, compared with the existing gear coupling, the thickness of the first insulating sleeve 2 is much greater than the insulating coating on the shaft, which has a stronger insulation effect on the high-frequency shaft current generated by the inverter, and the overall insulation performance of the coupling is better, thereby better solving 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 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 outer side of the first half-coupling sleeve 6, and the inner wall of the first tensioning disc inner sleeve 4 fits the outer wall of the first half-coupling sleeve 6, and the first tensioning disc 5 is sleeved on the outer 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 arranged on the left end portion of the first tensioning disc inner sleeve 4, and a plurality of first through holes are arranged at equal angles on the end surface of the fourth flange, and a plurality of first bolt 3 holes are arranged at equal angles on the left end surface of the first tensioning disc 5, and a 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 the outer wall of the first tensioning disc inner sleeve 4 is provided with a first conical surface, and the inner wall of the first tensioning disc 5 is provided with a second conical surface, and the first conical surface fits the second conical surface. When in use, the first tensioning disc 5 is first sleeved on the first half coupling sleeve 6, and then the first tensioning disc 5 is further pushed to the right end of the first half coupling sleeve 6, and then the first tensioning disc inner sleeve 4 is sleeved on the first half coupling sleeve 6, so that the first tensioning disc inner sleeve 4 can be located on the circumferential outer side of the first insulating sleeve 2, and the first bolt 3 is screwed forward, and the first tensioning disc 5 gradually approaches the fourth flange, and the first tensioning disc 5 will gradually increase the extrusion force on the first tensioning disc inner sleeve 4, and the first tensioning disc inner sleeve 4 provides radial extrusion force to the first insulating sleeve 2, and the first insulating sleeve 2 is radially deformed by the radial force of the first tensioning disc inner sleeve 4 and fixed to the end of the driving shaft 1.

[0039] Preferably, a positioning groove is provided on the left end face of the first tensioning disk 5. Preferably, the positioning groove is in a ring shape as a whole. When the first tensioning disk 5 gradually approaches the fourth flange, the positioning groove can accommodate the fourth flange, so that the first tensioning disk 5 can further squeeze the first tensioning disk inner sleeve 4, thereby increasing the radial squeezing force of the first tensioning disk 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] In addition, the outer wall of the second half coupling sleeve is sleeved with the second tensioning disc inner sleeve, the outer wall of the second tensioning disc inner sleeve is sleeved with the second tensioning disc, and the second tensioning disc is connected to the second tensioning disc inner sleeve through a plurality of second bolts. The first half coupling sleeve 6 has the same structure as the second half coupling sleeve, the first tensioning disc inner sleeve 4 has the same structure as the second tensioning disc inner sleeve, and the corresponding functions are similar, so they will not be described in detail.

[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 half coupling sleeve 6, and a third flange is integrally provided at the left end of the second half coupling sleeve. Specifically, the first flange and the second flange are connected to each other through a plurality of first locking bolts 7, that is, the first locking bolts 7 provide a fastening effect between the first half coupling sleeve 6 and the universal joint 8, and the second locking bolts provide a fastening effect between the second half coupling sleeve and the universal joint 8.

[0042] Correspondingly, a plurality of first teeth are arranged in arrays on both end surfaces of the universal joint 8, a plurality of second teeth are arranged in arrays on the end surface of the first end of the first half coupling sleeve 6, a plurality of third teeth are arranged in arrays on the end surface of the first end of the second half coupling sleeve, and the first teeth on both end surfaces of the universal joint 8 are respectively meshed with the second teeth and the third teeth. The first teeth and the second teeth are meshed with each other to provide a torque transmission effect between the first half coupling sleeve 6 and the universal joint 8, and the first teeth and the third teeth are meshed with each other to provide a torque transmission effect between the second half coupling sleeve and the universal joint 8.

[0043] In one 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. The number of notches 10 is multiple, preferably, specifically, the number of notches 10 is 3, the length of the notch 10 is less than the length of the first insulating sleeve 2, and one end of the notch 10 extends to the end surface of the first insulating sleeve 2 along the axial direction of the first insulating sleeve 2. Through the plurality of notches 10 arranged in an array on the outer peripheral side surface of the first insulating sleeve 2, when the first half coupling sleeve 6 is radially deformed, the outer circle of the first insulating sleeve 2 and the inner hole of the first half coupling sleeve 6 reach an interference fit, and the first insulating sleeve 2 can be further radially squeezed to cause a certain degree of radial deformation, so that the outer circle of the driving shaft 1 and the inner hole of the first insulating sleeve 2 reach an interference fit.

[0044] Specifically, after the first bolt 3 connects and tightens the first tensioning plate 5 and the first tensioning plate 5, the first half coupling sleeve 6 and the first insulating sleeve 2 can both produce a certain radial deformation. At this time, the first ceramic sleeve and the inner hole of the first half coupling sleeve 6 are interference fit, and the outer circle of the driving shaft 1 is interference fit with the inner hole of the ceramic sleeve, thereby improving the overall torque transmission effect of the coupling. Further, the length of the notch 10 is greater than the length of the connection mating surface between the driving shaft 1 and the first half coupling sleeve 6, so as to ensure that the length of the connection mating surface between the first ceramic sleeve and the driving shaft 1 is not less than the length of the connection mating surface between the driving shaft 1 and the first half coupling sleeve 6 after the first ceramic sleeve produces radial deformation, further improving the overall torque transmission effect of the coupling.

[0045] As shown in FIG3 , in the first embodiment of the present invention, a plurality of circular holes 11 are arranged in an array on the outer peripheral side of the first insulating sleeve 2, each of which 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, and then the notch 10 is processed along the axial direction of the first insulating sleeve 2 by milling or wire cutting, and the notch 10 is connected and connected with the circular hole 11. On the one hand, a circular hole 11 is preferentially processed at the end position of the notch 10, which can prevent stress concentration from being generated 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 force 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] As shown in FIG4 , in the second embodiment of the present invention, a plurality of circular holes 11 are arranged in an array on the outer peripheral side of the first insulating sleeve 2, and every two circular holes 11 are respectively located at the two ends of a slot 10, and the diameter of the circular hole 11 is greater than the width of the slot 10. When processing the slot 10, firstly, a circular hole 11 is processed at each of the two ends of the slot 10, and the diameter of the circular hole 11 is greater than the width of the slot 10, and then the slot 10 is processed along the axial direction of the first insulating sleeve 2 by milling or wire cutting, and the slot 10 is connected and connected with the two circular holes 11.

[0047] As shown in Figure 5, 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 complete, 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 slotting position is filled with insulating glue while the slotting is being opened, and several tiles are bonded together by the insulating glue, which ensures a more complete interference fit between the outer circle of the driving 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 driving 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 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 slippage 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 into comprehensive consideration the 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 present invention 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 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 of the first half coupling sleeve 6, the first bolt 3 is screwed forward, and the first tensioning plate 5 is gradually tightened toward the fourth flange As the disks approach, the first tensioning disk 5 will gradually increase the radial extrusion pressure on the first tensioning disk inner sleeve 4, and the first tensioning disk 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 disk 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, and the outer circle of the driving shaft 1 and the inner hole of the first insulating sleeve 2 are interference fit, and 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 gear box 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] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these 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 is connected to the first end of the universal joint, wherein the first half coupling sleeve is sleeve-connected to the driving shaft and is used to transmit the torque of the driving shaft to the universal joint; A second half coupling sleeve is connected to the second end of the universal joint, and the second half coupling sleeve is sleeve-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. An 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. An 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 two 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 circumferential 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 circumferential side surface of the first insulating sleeve, and every two of the circular holes are respectively 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, 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.

7. An 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, 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 via a plurality of first locking bolts, and the first flange and the third flange are connected to each other via a plurality of second locking bolts.

9. An insulating coupling according to claim 8, characterized in that: A plurality of first teeth are arranged in an array on both end surfaces of the universal joint, a plurality of second teeth are arranged in an array on the end surface of the first end of the first half-coupling sleeve, a plurality of third teeth are arranged in an array on the end surface of the first end of the second half-coupling sleeve, and the first teeth on the two end surfaces 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 any one of claims 1 to 9.

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