Split insulation flange

Abstract

The application discloses a split type insulating flange plate and relates to the technical field of motor structures. The split type insulating flange plate comprises a first flange, an insulating layer and a second flange. The insulating layer is arranged between the first flange and the second flange, and the first flange and the second flange are electrically insulated through the insulating layer. The first flange, the second flange and the insulating layer are coaxially arranged in annular structures, and the first flange, the second flange and the insulating layer are fixedly connected. In application, the split type insulating flange plate can block the bearing current of a rotating part. The first flange is used for being connected with a generator rotor shaft system or a gear box shaft system, the second flange is used for being connected with a generator rotor iron core part, the electric path between the rotor and the shaft system can be disconnected through the insulating effect of the insulating layer, the bearing current is blocked, and the bearing corrosion failure is reduced. In a wind driven generator, the split type insulating flange plate can be independent of the insulation of other parts of the wind driven generator set, is suitable for a generator without a shaft system, can be installed or replaced in a tower and has good maintainability.

Description

Technical Field

[0001] This invention relates to the field of motor structure technology, and in particular to a split-type insulating flange. Background Technology

[0002] Bearing erosion has always been a major technical problem in the wind power industry, seriously affecting the operational reliability of wind turbine generators. With the increase in generator power and operating voltage, the problem of bearing erosion has become more prominent. Therefore, when designing generators, measures must be taken to block bearing current and prevent bearing erosion.

[0003] To prevent bearing electrolytic corrosion, insulated bearing housings or insulated end caps are typically used to block shaft currents. However, this structure has limitations; it is an insulation structure based on stationary, non-rotating components. For some generators highly integrated with the gearbox, where the generator lacks an independent shaft system, the generator rotor, shaft system, and bearings on the shaft form an electrical path during operation, posing a risk of bearing electrolytic corrosion. This type of electrical path formed between rotating components cannot be prevented from blocking shaft currents by installing the aforementioned insulated bearing housings or insulated end caps. Therefore, there is still no suitable way to reduce electrolytic corrosion failures in the bearings of this type of generator.

[0004] Therefore, how to provide a method for blocking bearing current in rotating components to reduce bearing electrolytic corrosion failure is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the object of the present invention is to provide a split insulating flange that can block the bearing current of rotating parts, thereby reducing bearing electrolytic corrosion failure.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A split-type insulating flange includes a first flange, an insulating layer, and a second flange; the insulating layer is disposed between the first flange and the second flange, and the first flange and the second flange are electrically insulated from each other by the insulating layer; the first flange, the second flange, and the insulating layer are a coaxially arranged annular structure, and the first flange, the second flange, and the insulating layer are fixedly connected.

[0008] Preferably, the first flange is connected to the second flange by a connecting pin, and the connecting pin is in an insulating fit with at least one of the first flange and the second flange.

[0009] Preferably, the connecting pin is connected with the first flange through a hole structure on the first flange, a part of the connecting pin located in the hole structure is a first connecting part; an insulating sleeve is arranged in the hole structure to electrically insulate the hole wall of the hole structure and the first connecting part.

[0010] Preferably, the at least one connecting pin is a first connecting pin, the first connecting pin comprises a pin rod and an end cap fixed to one end of the pin rod to form a T-shaped structure; the first connecting pin is threadedly fixed to the second flange at an end away from the end cap, the end cap is arranged outside the first flange, the end cap and the second flange sandwich the first flange, and the end cap is separated from the outer surface of the first flange by an end cap insulating plate.

[0011] Preferably, the at least one connecting pin is a second connecting pin; a first through hole is arranged on the first flange, an insulating through hole is arranged on the insulating layer, and a first blind hole is arranged on the second flange; the second connecting pin is sequentially inserted into the first through hole, the insulating through hole and the first blind hole; the end of the first through hole away from the first blind hole is capped by an insulating end cap, and the two ends of the second connecting pin abut against the hole end face of the first blind hole and the insulating end cap respectively; an insulating ring plate coaxial with the first flange is arranged on the outer side of the first flange, the insulating end cap is arranged between the insulating ring plate and the first flange, and the end cap insulating plate is integrally arranged on the insulating ring plate.

[0012] Preferably, the at least one connecting pin is a second connecting pin; one of the first flange and the second flange is provided with a first through hole, and the other is provided with a first blind hole; an insulating through hole is arranged on the insulating layer; the second connecting pin is sequentially inserted into the first through hole, the insulating through hole and the first blind hole; the end of the first through hole away from the first blind hole is capped by an insulating end cap, and the two ends of the second connecting pin abut against the hole end face of the first blind hole and the insulating end cap respectively.

[0013] Preferably, one of the first flange and the second flange provided with the first blind hole is further provided with an exhaust hole to communicate the first blind hole with the atmosphere.

[0014] Preferably, the connecting pin sequentially connects the first flange, the insulating layer and the second flange in the axial direction or in the radial direction.

[0015] Preferably, the insulating layer is a bent structure protruding towards one side in the axial direction; one of the first flange and the second flange is provided with a mounting groove at one end in the axial direction, and the protruding side of the insulating layer is connected to the groove face of the mounting groove; the other of the first flange and the second flange extends into and is connected to the recessed side of the insulating layer in the axial direction.

[0016] Preferably, the first flange, the insulation layer and the second flange are sleeved from inside to outside in sequence, part structure of the first flange protrudes radially outward to form a first protrusion, part structure of the second flange protrudes radially inward to form a second protrusion, and the first protrusion and the second protrusion abut against two sides of the insulation layer along the axial direction.

[0017] The split type insulation flange plate provided by the application comprises a first flange, an insulation layer and a second flange. The insulation layer is arranged between the first flange and the second flange, and the first flange and the second flange are electrically insulated by the insulation layer. The first flange, the second flange and the insulation layer are coaxially arranged in annular structures, and the first flange, the second flange and the insulation layer are fixedly connected.

[0018] The insulation layer on the split type insulation flange plate makes the flange plate itself have the function of blocking bearing current, and is suitable for insulation between connecting parts of a generator rotor. In application, the first flange is used for connecting with a generator rotor shaft system or a gear box shaft system, specifically through the inner ring of the first flange, and the second flange is used for connecting with a generator rotor core part, specifically through the outer ring of the second flange. By the insulation effect of the insulation layer, the electrical path between the rotor and the shaft system can be disconnected to block bearing current and reduce bearing corrosion failure. In a wind driven generator, the insulation function of blocking bearing current can be realized on the wind driven generator body without relying on the insulation of other parts of the wind driven generator set, and is suitable for a generator without a shaft system. In addition, the split type insulation flange plate is simple to operate in the process of installation in the generator, and can be installed or replaced in the tower, and has good maintainability. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0020] Figure 1 The first part of the sectional view of the split type insulation flange plate provided by the present application is shown in Embodiment One.

[0021] Figure 2 The second part of the sectional view of the split type insulation flange plate provided by the present application is shown in Embodiment One.

[0022] Figure 3 The first part of the sectional view of the split type insulation flange plate provided by the present application is shown in Embodiment Four.

[0023] Figure 4Second part sectional view of embodiment four of split type insulating flange provided by the present application;

[0024] Figure 5 First part sectional view of embodiment five of split type insulating flange provided by the present application;

[0025] Figure 6 First part sectional view of embodiment two of split type insulating flange provided by the present application;

[0026] Figure 7 Second part sectional view of embodiment three of split type insulating flange provided by the present application;

[0027] Figure 8 Appearance view of embodiment six of split type insulating flange provided by the present application.

[0028] Reference signs:

[0029] First flange 1, insulating sleeve 11, first connecting pin 12, pin rod 121, end cap 122, second connecting pin 13, first through hole 14, first protrusion 15, first connecting hole 16, first connecting part 17, second mounting groove 18;

[0030] Second flange 2, first blind hole 21, exhaust hole 22, mounting groove 23, second protrusion 24, second connecting hole 25;

[0031] Insulating layer 3, insulating through hole 31, insulating connecting hole 32;

[0032] Lock washer 4;

[0033] Insulating ring plate 5, end cap insulating plate 51;

[0034] Metal ring plate 6, metal cover plate 61;

[0035] Protective washer 7;

[0036] Insulating head 8. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0038] The core of the present application is to provide a split type insulating flange which can block the bearing current of rotating parts to reduce bearing corrosion failure.

[0039] Please refer to the specific embodiment one of the split type insulating flange plate provided by the present application Figure 1 and Figure 2 , comprising a first flange 1, an insulating layer 3 and a second flange 2.

[0040] The insulating layer 3 is arranged between the first flange 1 and the second flange 2, and the first flange 1 and the second flange 2 are electrically insulated by the insulating layer 3. The insulating layer 3 can be made of an insulating plate or an insulating tube, and is connected to the first flange 1 and the second flange 2 by interference fit. Alternatively, the insulating layer 3 can be made by pouring resin, winding and curing glass fiber cloth, etc. In the actual processing, the glass fiber cloth can be wound around the first flange 1 to form the insulating layer 3, and then the insulating layer 3 is interference fitted with the second flange 2. The thickness of the insulating layer 3 depends on the required insulation capacitance requirement.

[0041] The first flange 1, the second flange 2 and the insulating layer 3 are coaxially arranged in a ring structure, and the first flange 1, the second flange 2 and the insulating layer 3 are fixedly connected. The first flange 1 and the second flange 2 are kept insulated. Alternatively, in the radial direction, the inner ring of the first flange 1 is located inside the inner ring of the second flange 2, and the outer ring of the first flange 1 is located inside the outer ring of the second flange 2, so that in the split type insulating flange plate, the inner ring of the first flange 1 is the inner ring of the split type insulating flange plate, and the outer ring of the second flange 2 is the outer ring of the split type insulating flange plate. Of course, in other embodiments, the radial position relationship of the first flange 1 and the second flange 2 can be other arrangements, for example Figure 5 In the embodiment, the outer rings of the first flange 1 and the second flange 2 are coplanar.

[0042] In this embodiment, the insulating layer 3 on the split type insulating flange plate makes the flange plate itself have the function of blocking the bearing current, and is suitable for insulation between the connecting parts of the generator rotor. In application, the first flange 1 is used to connect with the generator rotor shaft system or the gear box shaft system, specifically through the inner ring of the first flange 1, and the second flange 2 is used to connect with the generator rotor core, specifically through the outer ring of the second flange 2. Through the insulation effect of the insulating layer 3, the electrical path between the rotor and the shaft system can be disconnected to block the bearing current and reduce the bearing corrosion failure. In the wind driven generator, the insulation function of blocking the bearing current can be realized on the body of the wind driven generator without relying on the insulation of other parts of the wind driven generator set, and is suitable for generators without shaft system. In addition, the split type insulating flange plate is easy to install and replace in the process of installing the generator, and has good maintainability.

[0043] Furthermore, the first flange 1 is connected to the second flange 2 via a connecting pin for easy assembly and disassembly. Optionally, depending on actual needs, the connecting pin can be a bolt or a pin. Specifically, the first flange 1, the second flange 2, and the insulating layer 3 are each provided with a hole structure, and the connecting pin is simultaneously connected to the hole structures of the above three components. Specifically, the hole structure on the first flange 1 is a first connecting hole 16, the hole structure on the second flange 2 is a second connecting hole 25, and the hole structure on the insulating layer 3 is an insulating connecting hole 32.

[0044] Among them, such as Figure 1 As shown, the connecting pin can sequentially connect the first flange 1, the insulating layer 3, and the second flange 2 along the axial direction. In this case, at least a portion of the structures of the first flange 1, the insulating layer 3, and the second flange 2 are arranged side by side along the axial direction. Alternatively, as... Figure 6 As shown, the connecting pin can connect the first flange 1, the insulating layer 3, and the second flange 2 in a radial sequence. At this time, at least part of the structure of the first flange 1, the insulating layer 3, and the second flange 2 are arranged in parallel in a radial direction.

[0045] In addition, the connecting pin is in an insulating fit with at least one of the first flange 1, the insulating layer 3, and the second flange 2 to ensure the insulation between the first flange 1 and the second flange 2.

[0046] Furthermore, such as Figure 1 As shown, the portion of the connecting pin located within the first connecting hole 16 is the first connecting part 17. An insulating sleeve 11 is provided in the first connecting hole 16, and the insulating sleeve 11 electrically insulates the hole wall of the first connecting hole 16 from the first connecting part 17.

[0047] Because an insulating sleeve 11 is provided in the first connecting hole 16 to insulate the connecting pin from the first flange 1, the conductivity requirement for the connecting pin can be reduced. For example, the connecting pin can be a metal pin. In this case, no insulation is required between the second flange 2 and the connecting pin, and the connecting pin will not conduct electricity between the first flange 1 and the second flange 2.

[0048] Furthermore, such as Figure 1 As shown, at least one connecting pin is a first connecting pin 12. The first connecting pin 12 includes a pin 121 and an end cap 122 fixed to one end of the pin 121 to form a T-shaped structure. The end of the first connecting pin 12 away from the end cap 122 is threaded to the second flange 2. Specifically, the first connecting pin 12 is a bolt. The end cap 122 is externally placed on the first flange 1, and the end cap 122 and the second flange 2 clamp the first flange 1. The end cap 122 and the outer surface of the first flange 1 are separated by an end cap insulating plate 51 to ensure electrical insulation between the end cap insulating plate 51 and the first flange 1.

[0049] In this embodiment, as Figure 1As shown, the first connecting portion 17 in the first connecting hole 16 is arranged on the pin rod 121. In other embodiments, as shown in FIG. 2, the first connecting portion 17 in the first connecting hole 16 is an end cap 122. Figure 5 As shown, the first connecting portion 17 in the first connecting hole 16 is an end cap 122.

[0050] In this embodiment, the pin rod 121 is sequentially connected to the first flange 1, the insulation layer 3 and the second flange 2 along the axial direction, and the first connecting pin 12 is used to fasten the first flange 1 and the second flange 2. During assembly, the first connecting pin 12 is tightened to the second flange 2, and the end cap 122 and the second flange 2 clamp the first flange 1 along the axial direction.

[0051] In this embodiment, the pin rod 121 is sequentially connected to the first flange 1, the insulation layer 3 and the second flange 2 along the axial direction, and the first connecting pin 12 is used to fasten the first flange 1 and the second flange 2. During assembly, the first connecting pin 12 is tightened to the second flange 2, and the end cap 122 and the second flange 2 clamp the first flange 1 along the axial direction.

[0052] Further, as shown in FIG. 2, the at least one connecting pin is a second connecting pin 13. The first flange 1 is provided with a first through hole 14, the insulation layer 3 is provided with an insulation through hole 31, and the second flange 2 is provided with a first blind hole 21. The blind hole refers to a hole structure of the connecting pin having only one port for the connecting pin to enter and exit, and the remaining part does not contain the connecting pin. The second connecting pin 13 is sequentially inserted into the first through hole 14, the insulation through hole 31 and the first blind hole 21. That is, for the hole structure connected by the second connecting pin 13, the first through hole 14 is the first connecting hole 16, the insulation through hole 31 is the insulation connecting hole 32, and the first blind hole 21 is the second connecting hole 25. The port of the first through hole 14 away from the first blind hole 21 is capped by the insulation seal head 8, and the two ends of the second connecting pin 13 are respectively abutted against the hole end face of the first blind hole 21 and the insulation seal head 8. Figure 2 In this embodiment, the first connecting pin 12 is used to fasten and connect the first flange 1 and the second flange 2 along the axial direction, and the second connecting pin 13 is used to transmit torque of the overall structure.

[0053] In this embodiment, the pin rod 121 is sequentially connected to the first flange 1, the insulation layer 3 and the second flange 2 along the axial direction, and the first connecting pin 12 is used to fasten the first flange 1 and the second flange 2. During assembly, the first connecting pin 12 is tightened to the second flange 2, and the end cap 122 and the second flange 2 clamp the first flange 1 along the axial direction.

[0054] In this embodiment, the pin rod 121 is sequentially connected to the first flange 1, the insulation layer 3 and the second flange 2 along the axial direction, and the first connecting pin 12 is used to fasten the first flange 1 and the second flange 2. During assembly, the first connecting pin 12 is tightened to the second flange 2, and the end cap 122 and the second flange 2 clamp the first flange 1 along the axial direction.

[0055] Wherein, specifically, the second connecting pin 13 is a rod structure as a whole, and the first connecting part 17 of the second connecting pin 13 is a rod structure on the second connecting pin 13. The second connecting pin 13 is connected with the second flange 2 in an interference fit or an overfit, and is connected with the insulating sleeve 11 in an interference fit or an overfit. The insulating sleeve 11 is connected with the first flange 1 in an interference fit or an overfit, and the insulating sleeve 11 can ensure the electrical insulation of the first flange 1 and the second flange 2.

[0056] Wherein, when the hole structure corresponding to the second connecting pin 13 is processed, the second flange 2, the insulating layer 3 and the second flange 2 can be integrally drilled in the axial direction after the first connecting pin 12 fastens the first flange 1 and the second flange 2, so as to form a hole structure for connecting the second connecting pin 13 between the second flange 2, the insulating layer 3 and the first flange 1.

[0057] Wherein, specifically, the insulating head 8 is located outside the first connecting hole 16, and can be arranged in a sink hole on the outer surface of the first flange 1. Alternatively, the port of the first connecting hole 16 is coated with insulating glue.

[0058] Further, as shown in Figure 1 and Figure 2 , the outer side of the first flange 1 is provided with an insulating ring plate 5 coaxial with the first flange 1, the insulating head 8 is clamped between the insulating ring plate 5 and the first flange 1, and the end cap insulating plate 51 is integrally arranged on the insulating ring plate 5.

[0059] That is, the insulating ring plate 5 has the function of positioning the second connecting pin 13 in addition to the function of electrically insulating the end cap 122 of the first connecting pin 12 and the first flange 1, and can cooperate with the insulating head 8 to prevent the second connecting pin 13 from slipping out of the first flange 1.

[0060] In addition, a metal ring plate 6 is further arranged outside the first flange 1, the metal ring plate 6 is coaxial with the insulating ring plate 5, and the insulating ring plate 5 is arranged between the metal ring plate 6 and the first flange 1. The positioning ability of the second connecting pin 13 can be further improved by means of the metal ring plate 6. Specifically, the metal cover plate 61 is integrally arranged on the metal ring plate 6. The insulating ring plate 5 and the metal ring plate 6 are whole circle structures, which can connect all the first connecting pins 12 into one, and can improve the overall fastening reliability of the first connecting pin 12.

[0061] Further, as shown in Figure 2 , the one of the first flange 1 and the second flange 2 provided with the first blind hole 21 is further provided with an exhaust hole 22 to communicate the first blind hole 21 with the atmosphere. When installing the second connecting pin 13, it needs to be installed towards the first blind hole 21 through the first through hole 14 and the insulating through hole 31. At this time, the gas in the first blind hole 21 can be discharged through the exhaust hole 22, which can reduce the assembly difficulty.

[0062] In the embodiment, as shown in Figure 2 The exhaust hole 22 is in communication with the end face of the first blind hole 21 opposite to the opening of the first blind hole 21, and the exhaust hole 22 is a through hole with a smaller diameter than the first blind hole 21 and is arranged in the axial direction.

[0063] Further, as shown in Figure 1 and Figure 2 The insulation layer 3 is a bent structure protruding towards one side in the axial direction. The first flange 1 is provided with a mounting groove 23 at one end in the axial direction, and the outer protruding side of the insulation layer 3 is connected to the groove face of the mounting groove 23, and the first flange 1 extends into and is connected to the recessed side of the insulation layer 3 in the axial direction, which can effectively shorten the overall space occupied by the first flange 1 and the second flange 2 in the axial direction and improve the positioning accuracy of the two.

[0064] Of course, in other embodiments, the mounting groove can also be provided on the first flange 1, as shown in Figure 3 At this time, the mounting groove is a second mounting groove 18 provided at one end of the first flange 1 in the axial direction and located at the outer end of the first flange 1 in the radial direction, and the insulation layer 3 and the second flange 2 both extend into the mounting groove 23 in the axial direction to be connected.

[0065] In a second specific embodiment of the split insulation flange provided by the application, as shown in Figure 6 Unlike the above embodiments, another way of assembling the connecting pin, the first flange 1 and the second flange 2 is provided.

[0066] Specifically, the connecting pin is directly selected as an insulation connecting pin, at this time, the connecting pin can directly contact the first connecting hole 16 and the second connecting hole 25, without the need to additionally add an insulation sleeve 11 or other insulation structure between the connecting pin and the first flange 1 or the second flange 2. Alternatively, the insulation connecting pin can be realized by spraying an insulating surface layer on a metal pin, or the insulation connecting pin is entirely made of an insulating material.

[0067] Further, at least one connecting pin is a second connecting pin 13. In the installation direction, the second connecting pin 13 is installed in the radial direction and is used to transmit axial load and circumferential torque. The first flange 1 is provided with a first through hole 14, the second flange 2 is provided with a first blind hole 21, and the insulation layer 3 is provided with an insulation through hole 31, and the second connecting pin 13 is sequentially inserted into the first through hole 14, the insulation through hole 31 and the first blind hole 21 in the radial direction. The port of the first through hole 14 away from the first blind hole 21 is capped by an insulation head 8, and the two ends of the second connecting pin 13 in the radial direction are respectively abutted against the hole end face of the first blind hole 21 and the insulation head 8. Alternatively, the insulation head 8 is an insulation structural glue filled into the first through hole 14 to seal the first through hole 14.

[0068] In another embodiment, the second connecting pin 13 is also installed along the radial direction, but, as shown in the third embodiment, Figure 7 the first through hole 14 is arranged on the second flange 2, the first blind hole 21 is arranged on the first flange 1, and the insulating through hole 31 is arranged on the insulating layer 3, and the second connecting pin 13 is sequentially inserted into the first through hole 14, the insulating through hole 31 and the first blind hole 21.

[0069] In the present embodiment and the third embodiment, the second flange 21 is used to be connected with the rotor core part of the generator, and the first flange 16 is used to be connected with the rotor shaft system or the gear box shaft system. The difference between the two embodiments is that the connecting pin of the second embodiment is from the first flange 1 to the second flange 2, which is suitable for the working condition of small torque transmission, and in particular, the gear box shaft coupling and the flange plate are matched at the second flange 2 end, that is, the input torque is transmitted from the second flange 2 to the rotor core, and the first flange 1 only bears a small torque; the connecting pin of the third embodiment is from the second flange 2 to the first flange 1, which is suitable for the working condition that the input torque is transmitted from the first flange 1 to the rotor core through the second flange 2.

[0070] Further, as shown in the third embodiment, Figure 6 the first flange 1, the insulating layer 3 and the second flange 2 are sequentially sleeved from inside to outside, part of the structure of the first flange 1 protrudes outward along the radial direction to form a first protrusion 15, part of the structure of the second flange 2 protrudes inward along the radial direction to form a second protrusion 24, and the first protrusion 15 and the second protrusion 24 abut against both sides of the insulating layer 3 along the axial direction. At this time, the insulating layer 32 forms a stopper cooperation with the first flange 16 and the second flange 21, which can improve the ability to bear the axial load between each other.

[0071] Of course, in other embodiments, the first flange 1 and the second flange 2 can also be fixedly connected without using the connecting pin. As shown in the fourth embodiment, Figure 8 alternatively, the first flange 1 and the second flange 2 are fixedly connected by the way of tooth slot insertion cooperation, wherein the insulating layer 3 is in a shape suitable for the tooth slot shape and is clamped between the first flange 1 and the second flange 2. At this time, the insulating layer 3 can be in interference fit with the first flange 1 and the second flange 2 at the insertion position to realize fixed connection, and further, to improve the connection reliability, the first flange 1 and the second flange 2 can be respectively welded to the insulating layer 3. Alternatively, the first flange 1, the second flange 2 and the insulating layer 3 can be connected by an insulating key.

[0072] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being “connected” to another element, it can be directly connected to the other element or there can be an intervening element. Moreover, in the description of the present application, unless otherwise specified, the meaning of “a plurality of”, “a plurality of”, “a plurality of” is two or more than two.

[0073] The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, indicate relative positions or orientations based on the orientation or position shown in the drawings, and are used only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0075] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0076] The split type insulating flange plate provided by the present application is described in detail above. Specific examples are used in this paper to explain the principles and implementation methods of the present application. The above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A split insulating flange characterized in that, The application relates to a coaxial flange structure, which comprises a first flange (1), an insulation layer (3) and a second flange (2); the insulation layer (3) is arranged between the first flange (1) and the second flange (2), the first flange (1) and the second flange (2) are electrically insulated through the insulation layer (3); the first flange (1), the second flange (2) and the insulation layer (3) are coaxially arranged in a ring structure, the first flange (1), the second flange (2) and the insulation layer (3) are fixedly connected, the first flange (1) is connected to the second flange (2) through a connecting pin, and the connecting pin is in insulating cooperation with at least one of the first flange (1) and the second flange (2). At least one of the connecting pins is a first connecting pin (12), the first connecting pin (12) comprises a pin rod (121) and an end cap (122) fixed to one end of the pin rod (121) to form a T-shaped structure; one end of the first connecting pin (12) away from the end cap (122) is threadedly fixed to the second flange (2), the end cap (122) is arranged outside the first flange (1), the end cap (122) and the second flange (2) clamp the first flange (1), and the end cap (122) and the outer surface of the first flange (1) are separated by an end cap insulation plate (51); a metal cover plate (61) is arranged between the end cap insulation plate (51) and the end cap (122). At least one of the connecting pins is a second connecting pin (13); the first connecting pin (12) is used for axially tightly connecting the first flange (1) and the second flange (2), and the second connecting pin (13) is used for transmitting torque of the overall structure. A first through hole (14) is arranged on the first flange (1), an insulation through hole (31) is arranged on the insulation layer (3), a first blind hole (21) is arranged on the second flange (2), and the second connecting pin (13) is sequentially inserted into the first through hole (14), the insulation through hole (31) and the first blind hole (21); the end of the first through hole (14) away from the first blind hole (21) is covered by an insulation end cover (8), and the two ends of the second connecting pin (13) abut against the hole end face of the first blind hole (21) and the insulation end cover (8) respectively; an insulation ring plate (5) coaxial with the first flange (1) is arranged on the outer side of the first flange (1), the insulation end cover (8) is clamped between the insulation ring plate (5) and the first flange (1), and the end cap insulation plate (51) is integrally arranged on the insulation ring plate (5); a metal ring plate (6) is arranged outside the first flange (1), the metal ring plate (6) is coaxial with the insulation ring plate (5), the insulation ring plate (5) is arranged between the metal ring plate (6) and the first flange (1), and the metal cover plate (61) is integrally arranged on the metal ring plate (6).

2. The split insulating flange as set forth in claim 1, wherein The connecting pin is connected with the first flange (1) through a hole structure on the first flange (1), a part of the connecting pin located in the hole structure is a first connecting part (17); an insulating sleeve (11) is arranged in the hole structure, and the insulating sleeve (11) electrically insulates the hole wall of the hole structure and the first connecting part (17).

3. The split insulating flange as set forth in claim 1, wherein An exhaust hole (22) is further arranged on the second flange (2) to communicate the first blind hole (21) and the atmosphere.

4. The split insulating flange according to any one of claims 1 to 3, characterized in that The insulating layer (3) is a bending structure protruding towards one side in the axial direction; one of the first flange (1) and the second flange (2) is provided with a mounting groove (23) at one end in the axial direction, and the outer protruding side of the insulating layer (3) is connected to the groove surface of the mounting groove (23) in a fit manner; the other of the first flange (1) and the second flange (2) extends into and is connected to the recessed side of the insulating layer (3) in an axial direction.

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