A generator ring lead assembly fixing method and structure based on sparse support and elastic self-adaptation and a generator stator winding

Abstract

The present application relates to steam turbine generator stator winding design and manufacture, disclose a kind of based on sparse support and elastic adaptive generator ring lead assembly fixing method, structure and generator stator winding, the method is as follows: ring lead is laid in the recess of insulating support baffle installed along the outer circumferential surface of cone ring;Then the surface of support baffle is placed from below to above insulating gasket and process gasket, the pressing plate with recess is supported on process gasket, so that ring lead is limited between support baffle recess and pressing block recess and between the inner wall of recess with pre-treatment felt;According to design requirement, half of the tightening torque value is tightened between the locking bolt of cone ring, support baffle and pressing plate, after ring lead, pre-treatment felt, pressing plate and support baffle are completely cured, process gasket is removed and locking bolt is retightened according to design rated tightening torque value.The present application effectively prevents the loosening of pressing plate and the wear of ring lead, and avoids the damage of lead caused by resonance.

Description

Technical Field

[0001] This invention relates to the field of turbine generator stator winding design and manufacturing technology, and in particular to a generator ring lead assembly and fixing method, structure and generator stator winding based on sparse support and elastic self-adaptation. Background Technology

[0002] As a key component connecting the stator winding to the external circuit, the quality of the generator's toroidal leads plays a decisive role in the operational stability and service life of the equipment. During generator operation, the toroidal leads must withstand various forces, including electromagnetic forces, thermal stress, and mechanical vibrations. Improper assembly can easily lead to insulation wear, lead deformation, or even short circuits. Therefore, a scientific and reasonable assembly and fixing method is a crucial factor in ensuring the safe operation of the generator.

[0003] Currently, the common fixing methods for generator ring leads are mainly binding and conical ring + pressure plate + insulating screw tensioning. Binding uses high-temperature resistant insulating materials such as fiberglass tape to tightly bind the lead to the end of the iron core or a dedicated bracket. This method is simple to operate and low in cost, mainly suitable for small and medium capacity generators. Conical ring + pressure plate + insulating screw tensioning clamps the lead into a groove machined on the outer conical surface of the conical ring using a pressure plate and a tightening insulating screw. This fixing method offers high strength and strong vibration resistance, and is widely used in large-capacity, high-speed generators.

[0004] For example, invention patent CN118544290A discloses a generator annular lead assembly gap measuring and clamping device and method. This gap measuring and clamping device uses a conical ring + pressure plate + insulating screw tensioning structure to fix the annular lead. This typically presents the following problems: First, a fixing point needs to be set at short intervals along the circumference of the conical ring, resulting in a large number of pressure plates and consequently, a large number of insulating screws for fixing the pressure plates. This not only increases installation difficulty and cost but also complicates the structure and hinders maintenance. Second, because the annular lead is embedded in the outer surface of the conical ring, space constraints make it difficult to accurately measure the gap between the annular lead and the groove on the outer surface of the conical ring. This makes it difficult to accurately control the felt thickness, leading to incomplete clamping at some points, causing the pressure plate to loosen and wear on the annular lead. Finally, the need to periodically check the preload of all insulating screws makes the operation cumbersome, consuming significant manpower and time, and increasing maintenance costs. Summary of the Invention

[0005] To address the problems and shortcomings of the existing technologies, this invention proposes a generator ring lead assembly and fixing method, structure, and generator stator winding based on sparse support and elastic adaptive design.

[0006] To achieve the above-mentioned objectives, the technical solution of the present invention is as follows: This invention proposes a method for assembling and fixing generator ring leads based on sparse support and elastic adaptive design. The assembly and fixing method includes the following steps: Step S1. Lay the generator's ring lead in the grooves of the insulating support partitions that are evenly spaced along the outer circumference of the conical ring; Step S2. Place an insulating pad on the surface of the insulating support partition, and add a process pad on the insulating pad. Then support the pressure plate on the process pad. After the groove on the lower surface of the pressure plate is aligned with the groove on the upper surface of the insulating support partition, the two are set facing each other, thereby limiting the annular lead wire between the upper and lower grooves. There is pre-treated felt between the annular lead wire and the inner wall of the upper and lower grooves. Step S3. Connect and install locking bolts between the conical ring, insulating support plate and pressure plate, and tighten the locking bolts to half of the design torque value; after the ring lead wire, pre-treated felt, pressure plate and insulating support plate are completely cured, remove the process gasket and retighten the locking bolts to the design rated tightening torque value.

[0007] Preferably, the pre-treated felt disposed between the annular lead wire and the inner walls of the upper and lower grooves can be installed and assembled in the following two ways: The first method involves wrapping at least one layer of pre-treated felt around the surface of the annular lead with an insulating layer. After the annular lead is clamped and fixed in the positioning space formed by the upper and lower grooves, the pre-treated felt is located between the annular lead and the inner walls of the upper and lower grooves.

[0008] The second method involves laying at least one layer of pre-treated felt in the grooves on the upper surface of the insulating support partition and the grooves on the lower surface of the pressure plate before assembly. After the annular lead is clamped and fixed in the positioning space formed by the upper and lower grooves, the pre-treated felt is located between the annular lead and the inner walls of the upper and lower grooves.

[0009] Preferably, the grooves on the insulating support plate and the pressure plate are semi-circular grooves adapted to the shape and contour of the annular lead wire, and the groove surfaces (i.e., the inner walls of the grooves) are rough or patterned. After the pressure plate is assembled on the insulating gasket, the two grooves are aligned one above the other to form a complete circular positioning space, in which the annular lead wire is clamped and fixed.

[0010] Preferably, the pretreated felt refers to the felt obtained by pretreating the substrate felt. The pretreating operation specifically involves impregnating the substrate felt with epoxy resin, then heating it in an oven or drying it, and finally obtaining the pretreated felt.

[0011] Preferably, the thickness of the pre-treated felt is obtained by taking the average value of the gap between the groove of the annular lead wire and the groove of the insulating support partition and the groove of the pressure plate during the pre-assembly process.

[0012] Preferably, the insulating support partitions are installed evenly at 600mm intervals along the outer circumference of the conical ring.

[0013] Preferably, the insulating pads placed on the surface of the insulating support partition are of equal thickness.

[0014] Preferably, the thickness of the process gasket is 0.25 mm.

[0015] Based on the same inventive concept, this invention also discloses a generator ring lead assembly and fixing structure based on sparse support and elastic self-adaptation. The assembly and fixing structure is manufactured using the aforementioned ring lead assembly and fixing method and includes an assembly and fixing unit composed of an insulating support partition, a pressure plate, an insulating gasket, and pre-treated felt. The assembly and fixing unit is evenly spaced along the outer circumference of the conical ring. The insulating support partition is fixed in the positioning groove of the conical ring, and a groove is provided on the upper surface of the insulating support partition. The insulating gasket is disposed on the upper surface of the insulating support partition. The pressure plate is supported on the insulating gasket, and the groove on the lower surface of the pressure plate faces the groove on the surface of the insulating support partition. The two grooves form a positioning space for limiting the ring lead. The pre-treated felt is located between the ring lead and the inner wall of the positioning space formed by the two grooves. A first locking bolt connects the insulating support partition, pressure plate, insulating gasket, and conical ring, and a second locking bolt connects the insulating support partition and the conical ring.

[0016] Furthermore, the present invention discloses a generator stator winding, the stator winding comprising the aforementioned generator annular lead assembly and fixing structure based on sparse support and elastic self-adaptation.

[0017] The beneficial effects of this invention are: (1) Due to the large size of the conical ring, the natural frequency of the conical ring plus the generator stator end is usually greater than 100Hz. Existing technology chooses to directly fix the ring lead by slotting the conical ring, so that the lead is as close as possible to the conical ring and in contact with it, thereby ensuring that the natural frequency of the fixed stator lead is increased. Therefore, the more fixing points the existing technology has, the better, and the lead is completely fixed on the conical ring. The high stiffness of the conical ring itself is used to increase the stiffness of the stator lead, thereby avoiding 100Hz. However, the present invention reduces the fixing points and moves the stator lead away from the conical ring. By reducing the fixing points (i.e., reducing the stiffness), the natural frequency is weakened, so as to avoid resonance and prevent damage to the ring lead. The reduction of fixing points also significantly improves the installation efficiency and reduces the installation cost.

[0018] (2) In this invention, for the assembly of fastening structures, a temporary process shim is first added to the insulating gasket, and the bolt is tightened and cured with only half of its rated torque. Then the temporary process shim is removed, and the locking bolt is tightened with full torque. The above pre-tightening process allows the force of the pressure plate to act directly on the ring lead wire, rather than directly on the insulating gasket. This can increase the pre-tightening force of the ring lead wire, prevent the lead wire from loosening, and also allow the force of the pressure plate to act slightly on the insulating tape gasket, preventing the insulating gasket itself from loosening and shaking.

[0019] (3) By optimizing the layout of support points and adopting a felt adaptive fastening design, this invention avoids the problem of incomplete local pressure points due to inaccurate gap measurement in traditional structures, effectively preventing the pressure plate from loosening and the ring lead wire from wearing, thus improving the reliability of the fixed structure and the operational stability of the equipment.

[0020] (4) By using frequency avoidance design and utilizing the high damping properties of felt, the present invention effectively avoids resonance between the lead wire and the power frequency, attenuates the vibration energy of the lead wire, reduces the vibration and fatigue damage of the lead wire, and improves the service life of the equipment.

[0021] (5) This invention reduces the number of insulating screws, thereby reducing the workload and maintenance costs of periodically checking the preload. At the same time, the self-adaptive fastening design of the felt reduces failures caused by loose fasteners, further reducing the frequency and difficulty of maintenance.

[0022] (6) In the assembly process, a 0.25mm thick process shim is introduced for pre-tightening. Considering the pre-tightening force, the possibility of the pressure plate loosening is reduced, which will also reduce maintenance time and cost. Attached Figure Description

[0023] The foregoing and hereinafter detailed description of the invention becomes clearer when read in conjunction with the following drawings, in which: Figure 1 This is a cross-sectional schematic diagram of the generator stator winding annular lead assembly and fixing structure of the present invention; Figure 2 This is a schematic diagram of the layout of the generator stator winding annular lead assembly and fixing structure along the conical ring according to the present invention; Figure 3 A schematic diagram showing the layout of the existing generator stator winding annular lead assembly and fixing structure along the conical ring. Figure 4 A schematic diagram showing the comparison of wear before and after wear on the ring-shaped lead fixing structure of the existing generator stator winding.

[0024] In the picture: 1. Conical ring; 2. Insulating support partition; 3. Pressure plate; 4. Insulating gasket; 5. First locking bolt; 6. Second locking bolt; 7. Pre-treated felt; 8. Ring lead wire; 9. Assembly and fixing unit. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions of this invention, several specific embodiments will be used to further illustrate the technical solutions for achieving the objectives of this invention. It should be noted that the technical solutions claimed by this invention include, but are not limited to, the following embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort should fall within the scope of protection of this invention. The existing traditional stator ring lead fixing structure, which uses a combination of multi-point dense support, felt self-adaptation, insulating screw tensioning, and conical ring embedding, has many problems: 1. Taking a 3000mm diameter ring lead design as an example, a fixing point needs to be set approximately every 150mm along the circumference, requiring at least 60 pressure plates for fixing the entire ring lead. Each pressure plate requires 4-6 insulating bolts for fixing, resulting in approximately 300 insulating bolts needed for a single generator. This dense fixing method not only increases installation difficulty and cost but also complicates the structure and hinders maintenance.

[0026] 2. Reliability Issues: Because the annular lead is directly embedded in the outer surface of the conical ring, space constraints make it difficult to accurately measure the gap between the annular lead and the groove on the outer surface of the conical ring, resulting in difficulty in precisely controlling the felt thickness. This can cause some pressure points to be incompletely tightened, leading to loosening of the pressure plate and wear on the annular lead. Figure 4 As shown, when the felt on the upper part of the annular lead wire is worn away, due to the gap between the pressure plate and the conical ring, the pressure plate will fall and contact the annular lead wire, continuing to wear it down. Under the "seesaw" lever principle, this could further loosen the annular lead wire, potentially leading to serious safety accidents. 3. Complex maintenance issues: The preload of all insulated screws needs to be checked regularly, which is a complicated process that not only consumes a lot of manpower and time, but also increases maintenance costs. Therefore, addressing the bottlenecks of vibration risk, assembly complexity, and high maintenance costs caused by multi-point dense support in existing technologies, this invention breaks through the traditional "rigid clamping" mindset and proposes an elastic adaptive technology path based on dynamic frequency modulation. The core concept lies in reducing structural complexity by constructing a fewer-point support frame system, while simultaneously utilizing the synergistic damping characteristics of composite elastic elements to achieve dynamic stability constraints on the generator ring lead. This invention creatively integrates mechanical fixing and vibration control design: on the one hand, it significantly reduces the number of physical connection points to improve assembly efficiency; on the other hand, through the coordinated design of support point positions and elastic parameters, it achieves active dissipation of vibration energy while reducing static load. This invention constructs a new generation of generator ring lead assembly and fixing method and structure that combines lightweight design with high reliability.

[0027] From a dynamic perspective, the essence of the ring-shaped lead vibration problem is the coupled resonance between the electromagnetic excitation frequency and the structure's natural frequency. Traditional multi-point dense support schemes, which increase the natural frequency by increasing constraint stiffness, may inadvertently induce new mode shapes. This invention innovatively proposes a frequency avoidance design principle: by calculating the dominant frequency range of the ring-shaped lead under electromagnetic force through finite element simulation, the support point positions and elastic element stiffness are optimized in reverse, causing the overall natural frequency of the structure to deviate from the excitation frequency band.

[0028] This invention discloses an assembly and fixing structure for a generator ring lead 8 based on sparse support and elastic adaptive design, such as... Figure 2 As shown, the assembly and fixing structure includes a basic assembly and fixing unit consisting of an insulating support partition 2, a pressure plate 3, an insulating gasket 4, and a pre-treated felt 7. These basic assembly and fixing units are evenly installed at 600mm intervals along the outer circumference of the conical ring 1; wherein, as... Figure 1 As shown, the bottom of the insulating support partition 2 is embedded in the positioning groove of the conical ring 1 and is fixedly connected to the conical ring 1 by the second locking bolt 6. The upper surface of the insulating support partition 2 is provided with a semi-circular groove adapted to the shape and size of the annular lead wire 8 for installing and fixing the annular lead wire 8. The insulating gasket 4 is provided on the upper surface of the insulating support partition 2, and the pressure plate 3 presses and supports on the insulating gasket 4. The lower surface of the pressure plate 3 is also provided with a semi-circular groove adapted to the shape and size of the annular lead wire 8. When the pressure plate 3 presses and supports on the annular lead wire 8, the pressure plate 3 presses and supports on the annular lead wire 8. After the insulating pad 4 is installed, the semi-circular groove on its lower surface aligns with the groove on the upper surface of the insulating support plate 2. The two grooves are set facing each other, one above the other, thereby enclosing and forming a positioning space for limiting and fixing the annular lead 8 (the insulating support plate 2 and the pressure plate 3 cooperate to fix the annular lead 8). The pre-treated felt 7 is located between the annular lead 8 and the inner wall of the positioning space formed by the two grooves. The insulating support plate 2, the pressure plate 3, the insulating pad 4, and the conical ring 1 are connected and installed with a first locking bolt 5.

[0029] In the embodiment described in this invention, the positioning space formed by the two semi-circular grooves has an overall cylindrical shape, a complete circular cross-section, and dimensions that match the annular lead wire 8. After assembly, the annular lead wire 8 passes through the positioning space and is clamped and fixed in the positioning space by the upper and lower grooves on the insulating support partition 2 and the pressure plate 3 based on the preload of the first locking bolt 5.

[0030] To prevent serious accidents caused by wear of the annular lead 8 in the aforementioned assembly and fixing structure, this invention provides lead grooves on the surfaces of the insulating support partition 2 and the pressure plate 3, respectively. Combined with the insulating gasket 4 between them, this ensures that even if the pre-treated felt on the outer layer of the annular lead 8 is completely worn, the relative position of the pressure plate 3 and the support partition remains stable, avoiding direct wear on the annular lead 8. This design effectively extends the service life of the annular lead and improves the reliability of the equipment.

[0031] Furthermore, the number of positioning spaces formed on the basic assembly fixing unit for limiting and fixing the annular lead 8 is at least one, and can be configured according to the number of annular leads 8. In other words, the number of semi-circular grooves machined on the insulating support partition 2 and the pressure plate 3 is machined and configured according to the number of generator annular leads. After the pressure plate 3 is pressed and fixed on the insulating support partition 2, the semi-circular grooves machined on the surfaces of the two correspond one-to-one, forming multiple positioning spaces with circular cross-sections.

[0032] Based on the same inventive concept, this invention discloses a generator stator winding, which includes a generator ring lead assembly and fixing structure based on sparse support and elastic self-adaptation as described in the above embodiments.

[0033] Furthermore, this invention also proposes a generator ring lead assembly and fixing method based on sparse support and elastic adaptive design. This assembly and fixing method is used to prepare the aforementioned ring lead assembly and fixing structure, including a pre-assembly step and a field assembly step. The specific operation method is as follows: Pre-assembly steps 1. Processing of insulating support partitions and pressure plates 1.1. Material Selection The base material of the insulating support partition 2 and the pressure plate 3 is made of F-grade epoxy glass felt board, with a tensile strength ≥250MPa and a temperature resistance of up to 155℃, which can meet the requirements of generator use in high temperature and high stress environment.

[0034] 1.2. Surface Measures Semi-circular grooves are machined on the surfaces of the insulating support partition 2 and the pressure plate 3 to serve as lead grooves for the annular lead 8. The inner walls of the semi-circular grooves are machined into a pattern or roughened to prevent displacement of the pre-treated felt 7 between the annular lead 8 and the insulating support partition 2 and the pressure plate 3, thus ensuring the reliability of the fixation.

[0035] 2. Preparation and pretreatment of substrate felt The substrate felt is cut into strips with a width equal to the width of the support partition plus 20mm and a length equal to 8 circumferences of the ring lead wire. The cut substrate felt is then impregnated with epoxy resin and heated in an oven or air-dried to pre-cure it while retaining some elasticity, resulting in pre-treated felt 7, which facilitates subsequent installation and fixing.

[0036] 3. Felt thickness formulation The annular lead wire 8 is laid in the groove of the processed insulating support partition 2. Then, the pressure plate 3 is directly installed on the upper surface of the insulating support partition 2. During installation, the upper part of the annular lead wire 8 protrudes from the groove of the insulating support partition and is placed in the groove on the lower surface of the pressure plate 3. After the pressure plate 3 is fixed in place, the annular lead wire 8 is located in the positioning space formed by the upper and lower grooves. Then, the gap between the annular lead wire 8 and the groove of the insulating support partition and between the annular lead wire 8 and the groove of the pressure plate are measured at each support point. The average value of the multiple measurements is taken as the final gap value. Then, the thickness of the pre-treated felt 7 is precisely prepared according to the gap value to ensure that the felt can completely fill the gap after compression, and the compression amount is controlled at 40%-60% to ensure a good pressing effect.

[0037] On-site assembly steps Step S1. Positioning of the insulating support partition and laying of the ring lead wire Install insulating support partitions 2 evenly along the outer circumference of the conical ring 1 at predetermined intervals. During installation, insert the insulating support partitions 2 into the positioning grooves of the conical ring 1, and gently tap the support partitions with a rubber mallet or similar tool until they are completely in contact with the conical ring 1. Check that the height difference at the top of the support partitions is ≤0.5mm to ensure the horizontality of the lead wires and avoid affecting the fixing effect and operational stability due to lead wire tilting. Then, the annular lead 8 is laid in the grooves of each insulating support plate 2 that is evenly spaced along the outer circumference of the conical ring 1.

[0038] Step S2. Pressure plate installation Multiple insulating pads 4 of equal thickness are placed on the upper surface of each insulating support partition 2, and a 0.25mm process pad is temporarily added on each insulating pad 4. Then, a pressure plate 3 is installed on each insulating support partition 2. The pressure plate 3 is supported on the process pad, and the groove on the lower surface of the pressure plate 3 and the groove on the upper surface of the insulating support partition 2 are arranged facing each other, one above the other, to confine the annular lead 8 in the positioning space formed by the upper and lower grooves. There is a pre-treated felt 7 between the annular lead 8 and the inner wall of the upper and lower grooves.

[0039] Step S3. Pre-tighten and complete the final assembly. The first locking bolt 5 is installed between the conical ring 1, the insulating support plate 2, and the pressure plate 3. The first locking bolt 5 is tightened to half of the design torque value. After the annular lead wire 8, the pre-treated felt 7, the pressure plate 3, and the insulating support plate 2 have completely cured (after curing there is no more compression and the gap can be completely filled), the process gasket is removed, and the first locking bolt 5 is retightened to the design rated tightening torque value.

[0040] After assembly, the annular lead 8 is supported and fixed along the outer circumference of the conical ring 1 on several evenly spaced basic assembly fixing units. Each basic assembly fixing unit is a support point of the annular lead 8 on the conical ring 1.

[0041] In the embodiments described in this invention, for ease of installation and fixation, the first locking bolt 6 passes through the pressure plate 3, the insulating gasket 4, the insulating support partition 2 and the conical ring 1 in sequence, and then is pulled together and locked in place.

[0042] For the above-mentioned on-site assembly process, the installation of pre-treated felt 7 can be achieved in two ways. One method can be selected based on the actual conditions and requirements of the assembly site. Details are as follows: The first method involves wrapping the pre-treated and cured felt around the surface of the annular lead 8 covered with an insulating layer, typically 2-3 turns, and then embedding it into the groove of the insulating support partition 2. When the pressure plate 3 is installed in place, the annular lead 8 is confined between the groove of the insulating support partition 2 and the groove of the pressure plate 3. At this time, the pre-treated felt 7 is located between the annular lead 8 and the inner walls of the upper and lower grooves.

[0043] The second method involves first laying and fixing pre-treated felt 7 in the grooves of the insulating support partition 2 and the pressure plate 3, respectively. Then, the annular lead 8 covered with an insulating layer is placed on the pre-treated felt 7 in the groove of the insulating support partition. Next, the pressure plate 3 is installed, and the pre-treated felt 7 in the groove of the pressure plate covers the upper half of the annular lead. The pre-treated felt 7 is located between the annular lead 8 and the inner walls of the upper and lower grooves.

[0044] The generator ring lead assembly and fixing method and assembly and fixing structure proposed in the embodiments of the present invention have the following effects: 1.1. Fewer support points design Taking a 3000mm diameter ring lead design as an example, using the assembly and fixing structure of this invention, a fixing point (assembly and fixing unit) is set at approximately 600mm intervals on the surface of the conical ring. The entire ring lead requires approximately 15 high-strength insulating pressure plates for fixing. Each pressure plate requires 4-6 insulating screws for fixing, and a single generator requires approximately 80 insulating screws. (Refer to...) Figure 2 and Figure 3This invention's fewer-point support method replaces the dense fixing points of traditional insulated screws, and the installation time is only 1 / 4 to 1 / 3 of the original structure, which greatly improves installation efficiency and reduces installation costs.

[0045] 1.2. Insulating support partition and pressure plate fastening design The assembly and fastening structure of this invention adds an insulating support partition between the conical ring and the pressure plate, eliminating the need for slotting the outer surface of the conical ring. Both the support partition and the pressure plate have semi-circular grooves, which function the same as the slots on the outer surface of the conical ring for fixing the stator ring leads. This design simplifies the structure and improves its stability and reliability.

[0046] 1.3. Felt Adaptive Fastening Design By utilizing the elastic recovery force and self-adaptability of the compression felt, dynamic clamping is achieved between the pressure plate and the annular lead wire, and between the support partition and the annular lead wire. The felt can automatically adjust the clamping force according to the stress on the annular lead wire, ensuring that the lead wire is well fixed under different working conditions, while avoiding problems caused by excessively tight or loose fixing.

[0047] 1.4. Frequency Avoidance Design The natural frequency of the lead wire is determined by simulation calculation, and the layout of the support points is locally adjusted so that the natural frequency of the lead wire avoids the electromagnetic force frequency (95-108Hz). This can effectively avoid the problem of increased vibration caused by resonance with the electromagnetic force during operation, and improve the operational stability of the lead wire.

[0048] Furthermore, by utilizing the high damping properties of the pretreated felt, the vibration energy generated by the ring lead during operation is effectively attenuated, further reducing the vibration amplitude of the lead and improving the operational stability of the equipment.

[0049] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0050] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for assembling and fixing generator ring leads based on sparse support and elastic adaptive design, characterized in that, Includes the following steps: Step S1. Lay the generator's ring lead in the grooves of the insulating support partitions that are evenly spaced along the outer circumference of the conical ring; Step S2. Place an insulating pad on the surface of the insulating support partition, and add a process pad on the insulating pad. Then place the pressure plate on the process pad. The groove on the pressure plate is set opposite to the groove on the insulating support partition, and the annular lead is confined between the upper and lower grooves. There is pre-treated felt between the annular lead and the inner wall of the upper and lower grooves. Step S3. Connect and install locking bolts between the cone ring, the insulating support partition and the pressure plate, and tighten the locking bolts to half of the tightening torque value required by the design. After the ring lead, pre-treated felt, pressure plate and insulating support plate have completely cured, remove the process gasket and retighten the locking bolts to the designed rated tightening torque value.

2. The generator ring lead assembly and fixing method based on sparse support and elastic adaptive as described in claim 1, characterized in that, Pre-treated felt is wrapped around the surface of the annular lead with an insulating layer. After the annular lead is positioned between the upper and lower grooves, the pre-treated felt is located between the annular lead and the inner walls of the upper and lower grooves.

3. The generator ring lead assembly and fixing method based on sparse support and elastic adaptive as described in claim 1, characterized in that, Pre-treated felt is laid in the grooves of the insulating support partition and the pressure plate, respectively. When the annular lead is limited between the upper and lower grooves, the pre-treated felt is located between the annular lead and the inner walls of the upper and lower grooves.

4. The generator ring lead assembly and fixing method based on sparse support and elastic adaptive as described in claim 1, characterized in that, The grooves on the insulating support partition and the pressure plate are all semi-circular grooves, and the groove surfaces are rough or have patterns.

5. The generator ring lead assembly and fixing method based on sparse support and elastic adaptive as described in claim 1, characterized in that, The pretreated felt is obtained by impregnating the base felt with epoxy resin and then heating it in an oven or drying it.

6. The generator ring lead assembly and fixing method based on sparse support and elastic adaptive as described in claim 1, characterized in that, The thickness of the pre-treated felt is obtained by measuring the gap between the annular lead wire and the groove of the insulating support partition and the groove of the pressure plate during the pre-assembly process and taking the average value.

7. The generator ring lead assembly and fixing method based on sparse support and elastic adaptive as described in claim 1, characterized in that, The insulating support partition is installed at 600mm intervals along the outer circumference of the conical ring.

8. The generator ring lead assembly and fixing method based on sparse support and elastic adaptive as described in claim 1, characterized in that, The insulating pads placed on the surface of the insulating support partition are of equal thickness.

9. The generator ring lead assembly and fixing method based on sparse support and elastic adaptive as described in claim 1, characterized in that, The thickness of the process gasket is 0.25 mm.

10. A generator ring lead assembly and fixing structure based on sparse support and elastic adaptive design, characterized in that, The assembly and fixing structure is obtained by the assembly and fixing method described in any one of claims 1-9, comprising an assembly and fixing unit consisting of an insulating support partition, a pressure plate, an insulating gasket, and pre-treated felt. The assembly and fixing unit is installed at uniform intervals along the outer circumference of the conical ring. The insulating support partition is fixed in the positioning groove of the conical ring, and the surface of the insulating support partition is provided with a groove. The insulating gasket is disposed on the surface of the insulating support partition. The pressure plate is supported on the insulating gasket, and the groove on the surface of the pressure plate faces the groove on the surface of the insulating support partition, forming a positioning space for limiting the annular lead wire. The pre-treated felt is located between the annular lead wire and the inner wall of the positioning space formed by the two grooves. Locking bolts are connected between the insulating support partition, the pressure plate, the insulating gasket, and the conical ring.

11. A generator stator winding, characterized in that, This includes the generator ring lead assembly and fixing structure based on sparse support and elastic adaptive as described in claim 10.

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