Generator based on phase change cooling

Abstract

The invention relates to the technical field of generators, particularly provides a generator based on phase change cooling, and aims to solve the problem that an existing generator cooling system is complex in pipeline structure. For this purpose, the generator based on phase change cooling of the present application comprises: a stator winding in which a first flow channel is formed; a second flow channel is formed in the main collector ring, and the main collector ring is electrically connected with each branch of the stator winding; a third flow channel is formed in the jumper wire, the third flow channel is communicated with the second flow channel, and the jumper wire is used for connecting a plurality of pole phase groups of the same phase of the stator winding in series; the condenser is respectively communicated with the main collector ring and the stator winding; and the pipeline system is arranged among the first flow channel, the second flow channel and the third flow channel in a communicating manner, so that a phase change working medium in the condenser can sequentially enter the third flow channel and the second flow channel along the first flow channel after entering the first flow channel, or directly enters the second flow channel along the first flow channel. The structure of a liquid path system of the generator can be simplified.

Description

Technical Field

[0001] The present application relates to the technical field of generators, and specifically provides a generator based on phase change cooling. Background Art

[0002] The heat dissipation problem during the operation of hydro-turbine generators directly affects their working efficiency and operating stability. At present, evaporative cooling technology using phase change materials as cooling medium is gradually being used in hydro-turbine generators because of its advantages over water cooling, air cooling, etc., such as high cooling efficiency, good insulation performance, and low operating pressure of the self-circulation system.

[0003] The merge rings of the operating hydro-turbine generators usually use air cooling to dissipate heat. However, with the continuous development of motor technology, the internal circuit structure of the motor is becoming more and more complex, and its heat dissipation requirements are also increasing. The traditional air cooling method will be difficult to meet the heat dissipation requirements of the merge rings. Therefore, phase change cooling technology has begun to be applied to the merge rings, that is, the phase change working fluid is introduced into the inside of the merge ring to achieve the purpose of heat dissipation. Therefore, in some related technologies, the stator windings and merge rings of the generator are equipped with corresponding cooling systems, so that the phase change working fluid flows through the stator windings and merge rings respectively to cool them. Although the above method improves the cooling efficiency of the generator to a certain extent, it also causes the pipeline structure to be more complicated, thereby increasing the occupied space of each functional component and increasing the difficulty of equipment maintenance.

[0004] Accordingly, the art needs a new technical solution to solve the above problems. Summary of the invention

[0005] The present application aims to solve the above-mentioned technical problem, that is, to solve the problem of complex piping structure of the existing generator cooling system.

[0006] In a first aspect, the present application provides a generator based on phase change cooling, comprising:

[0007] The stator winding has a first flow channel formed in each bar unit for the phase-changing medium to pass through;

[0008] A main slip ring, which is arranged around the stator winding and located above the stator winding, a second flow channel for the phase-changing medium to pass through is formed in the main slip ring, and the main slip ring is electrically connected to each branch of the stator winding;

[0009] A jumper wire is located between the main bus ring and the stator winding, a third flow channel for the phase-changing medium to pass through is formed in the jumper wire, the third flow channel is connected to the second flow channel, and the jumper wire is used to connect multiple pole phase groups of the same phase of the stator winding in series;

[0010] A condenser, which is located above the main slip ring, and the condenser is respectively connected to the main slip ring and the stator winding;

[0011] A piping system is connected between the first flow channel, the second flow channel and the third flow channel, so that after the phase change working medium in the condenser enters the first flow channel, it can enter the third flow channel and the second flow channel in sequence along the first flow channel, or directly enter the second flow channel along the first flow channel.

[0012] In a technical solution of the above generator, the liquid circuit system includes an electro-hydraulic separation device, the stator winding includes a first wire rod unit located at the end of any pole phase group and the end of any branch, and the electro-hydraulic separation device includes a first insulating pipeline and a first electrical connector;

[0013] When the electro-hydraulic separation device is connected between the first wire rod unit and the jumper wire, one end of the first insulating pipeline is connected to the hollow wire of the first wire rod unit, and the other end is connected to the end of the jumper wire to connect the first flow channel and the third flow channel, and the two ends of the first electrical connector are electrically connected to the first wire rod unit and the jumper wire respectively;

[0014] When the electro-hydraulic separation device is connected between the first wire rod unit and the main collector ring, one end of the first insulating pipeline is connected to the hollow wire of the first wire rod unit, and the other end is connected to the end of the main collector ring to connect the first flow channel and the second flow channel, and the two ends of the first electrical connector are electrically connected to the first wire rod unit and the main collector ring respectively.

[0015] In one technical solution of the above generator, the first electrical connector includes:

[0016] A first ring body, which surrounds the outer sides of the hollow wire and the solid wire of the first wire rod unit, and the inner surface of the first ring body is in contact with the first wire rod unit;

[0017] A first connecting member has one end connected to the first ring body and the other end connected to the jumper wire or the main bus ring.

[0018] In a technical solution of the above generator, the stator winding includes a second wire rod unit, and the second wire rod unit and the first wire rod unit are located in the same stator slot;

[0019] The pipeline system also includes a second insulating pipeline, one end of which is connected to the hollow conductor of the second wire rod unit, and the other end of which is connected to the main bus ring or the jumper wire to connect the first flow channel with the second flow channel or the third flow channel.

[0020] In a technical solution of the above generator, the stator winding includes a third wire rod unit, and along the circumferential direction of the stator winding, the third wire rod unit is located between any adjacent first wire rod units;

[0021] The pipeline system also includes a third insulating pipeline and a second electrical connector, one end of the third insulating pipeline is connected to the hollow conductor of the third wire rod unit, and the other end is connected to the jumper wire or the main collector ring to connect the first flow channel with the second flow channel or the third flow channel; the second electrical connector is connected between two radially adjacent third wire rod units.

[0022] In one technical solution of the above generator, the second electrical connector includes:

[0023] Two second ring bodies, which respectively surround the outer sides of the hollow wire and the solid wire of the third wire rod unit, and the inner surface of the third ring body is in contact with the third wire rod unit;

[0024] The second connecting member connects two adjacent second ring bodies.

[0025] In a technical solution of the above generator, the third insulating pipelines all extend along the radial direction of the generator.

[0026] In a technical solution of the above generator, the third insulating pipeline located in any crossover area of ​​the jumper is connected to the jumper; and / or

[0027] The third insulating pipeline located between adjacent jumper wires is connected to the main slip ring.

[0028] In a technical solution of the above generator, junction boxes are provided between the first insulating pipeline and the first wire rod unit, between the second insulating pipeline and the second wire rod unit, and between the third insulating pipeline and the third wire rod unit.

[0029] In a technical solution of the above generator, the height of the jumper wire is lower than the height of the main slip ring.

[0030] When adopting the above-mentioned technical scheme, the present application connects the piping system between the stator winding, the main collector ring and the jumper wire, so that the first flow channel in the stator winding, the second flow channel in the main collector ring and the third flow channel in the jumper wire form a fluid path system that is interconnected. In this way, during the operation of the generator, for the circulation system of the phase-change working fluid, the main collector ring and the jumper wire are located downstream of the stator winding, and the phase-change working fluid from the condenser first passes through the stator winding and then passes through the jumper wire or the main collector ring. In this way, the stator winding and the fluid path system of the collector ring can be merged, and there is no need to separately set a gas collecting ring above the stator winding, and functional components such as the fluid path joint are omitted. At the same time, the stator winding and the collector ring can share a set of condensers, which not only simplifies the fluid path structure and reduces the difficulty of system maintenance, but also saves space. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, in which:

[0032] Figure 1 is a schematic diagram of the overall structure of a generator based on phase change cooling according to an embodiment of the present application;

[0033] Figure 2 is a schematic diagram of a partial structure of a generator based on phase change cooling according to an embodiment of the present application;

[0034] Figure 3 is a schematic diagram of the circuit composition of a stator winding bar unit according to an embodiment of the present application;

[0035] Figure 4 is a schematic diagram of connection between a first wire rod unit and a main bus ring or a jumper wire according to an embodiment of the present application;

[0036] Figure 5 is a schematic diagram of connection between a second wire rod unit and a main bus ring or a jumper wire according to an embodiment of the present application;

[0037] Figure 6 It is a schematic diagram of the connection between the third bar unit and the main bus ring or jumper wire according to an embodiment of the present application.

[0038] In the figures, the reference numerals refer to the following:

[0039] 1. stator winding; 11. solid conductor; 12. hollow conductor; 13. first wire rod unit; 14. second wire rod unit; 15. third wire rod unit; 2. condenser; 3. main bus ring; 4. jumper wire;

[0040] 101. Liquid return pipe; 102. Gas collecting pipe; 103. Liquid collecting ring; 110. Electro-liquid separation device; 111. First insulating pipeline; 112. First ring body; 113. First connecting piece; 114. Junction box; 120. Second insulating pipeline; 130. Third insulating pipeline; 140. Second electrical connecting piece; 141. Second ring body; 142. Second connecting piece; 150. Fourth insulating pipeline. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application and are not used to limit the scope of protection of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0042] It should be noted that in the description of this application, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the relevant devices or components must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In addition, the ordinal numbers "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] Reference Figure 1 and Figure 2 , Figure 1 is a schematic diagram of the overall structure of a generator based on phase change cooling according to an embodiment of the present application, Figure 2 FIG. 1 is a schematic diagram of a partial structure of a generator based on phase change cooling according to an embodiment of the present application. Specifically, Figure 1 is a cross-sectional view of the generator along the axial direction. Figure 2 It is a three-dimensional state diagram of the top position of the generator.

[0045] The generator based on phase change cooling of the present application includes a stator winding 1, a slip ring and a condenser 2, wherein the stator winding 1 is mounted on a stator base, the slip ring includes a main slip ring 3 and a jumper wire 4, and the condenser 2 is fixedly arranged on the upper part of the foundation pit, and the condenser 2 is located above the main slip ring 3. Of course, the generator also includes necessary components such as a base, a frame, and a rotor, which are well-known technologies in the art and will not be described in detail in this application.

[0046] The stator winding 1, the main bus ring 3, the jumper wire 4 and the condenser 2 are connected through a pipeline system to achieve the liquid circuit connection and circuit connection between the above functional parts. Figure 1 , briefly introduce the relative position relationship of the above-mentioned functional parts of the generator. The pipeline system includes a liquid return pipe 101 and a gas collecting pipe 102 respectively connected to the two ends of the condenser 2. The liquid return pipe 101 extends downward from the end of the condenser 2 and is connected to a liquid collecting ring 103. The liquid collecting ring 103 is arranged along the circumference of the generator to pass the phase change medium into each wire rod unit of the stator winding 1. The pipeline system also includes an electro-hydraulic separation device 110 arranged between the stator winding 1 and the main collector ring 3 and the jumper wire 4. The electro-hydraulic separation device 110 is used to isolate the circuit connection and the liquid connection between the stator winding 1 and the main collector ring 3 and the jumper wire 4 from each other. The gas collecting pipe 102 is connected between the condenser 2 and the main merge ring 3, so that the liquid working medium from the condenser 2 can flow through the stator winding 1 and then flow through the jumper wire 4 and the main merge ring 3 in sequence, or directly enter the main merge ring 3, and finally the gas-liquid working medium enters the condenser 2 through the gas collecting pipe 102.

[0047] Reference Figure 1 and 2 The main slip ring 3 is arranged around the stator winding 1 and is located above the stator winding 1. The number of main slip rings 3 is determined according to the number of branches of the stator winding 1. The main slip ring 3 is electrically connected to each branch of the stator winding 1 and is used to lead out each branch of the stator winding 1 so that the main slip ring 3 can be connected in parallel with external electrical equipment. The jumper 4 is located between the main slip ring 3 and the stator winding 1 in the radial direction of the generator. There are multiple jumpers 4 arranged along the circumference of the generator. The jumper 4 is used to connect multiple pole phase groups of the same phase of the stator winding 1 in series.

[0048] In one embodiment of the present application, the stator winding 1 adopts a double-layer wave winding method, that is, two inner and outer wire rod units are arranged in each stator slot along the radial direction. Figure 3, is a schematic diagram of the end of the bar unit of the stator winding 1, each bar unit includes a solid conductor 11 and a hollow conductor 12, the hollow conductor 12 is surrounded by the solid conductor 11 around it, the hollow conductor 12 extends outward from the end of the bar unit, and a first flow channel for the phase change medium to pass through is formed in the hollow conductor 12. The interior of the main bus ring 3 and the jumper wire 4 are both hollow. For example, in some implementations, the main bus ring 3 and the jumper wire 4 can be a copper tube structure, so that a second flow channel for the phase change medium to pass through is formed in the main bus ring 3, and a third flow channel for the phase change medium to pass through is formed in the jumper wire 4, and the third flow channel is connected to the second flow channel through an insulating pipeline.

[0049] Reference Figure 2 In order to facilitate the description of the liquid connection and circuit connection between the stator winding 1 and the collector ring, the present application divides the wire rod units of the stator winding 1 into three categories, namely the first wire rod unit 13, the second wire rod unit 14 and the third wire rod unit 15. Among them, the first wire rod unit 13 is a wire rod unit at the end of any pole phase group and a wire rod unit at the end of any branch. The first wire rod unit 13 is respectively connected to the end of the jumper wire 4 and the end of the main collector ring 3, and the "connection" here includes both liquid connection and circuit connection. The second wire rod unit 14 is a wire rod unit in the same stator slot as the first wire rod unit 13, that is, the first wire rod unit 13 and the second wire rod unit 14 are two wire rod units radially spaced in the same stator slot. The second wire rod unit 14 can be directly connected to the main collector ring 3 or the jumper wire 4, and the "connection" here is only a liquid connection. The third wire rod unit 15 is a wire rod unit located between any adjacent first wire rod units 13 (or second wire rod units 14) in the circumferential direction of the stator winding 1. It can be seen that at any position in the circumferential direction of the stator winding 1, two third wire rod units 15 are radially arranged and located in the same stator slot. The above two third wire rod units 15 can be directly connected to the main collector ring 3 or the jumper wire 4. The "connection" here is also only a liquid circuit connection.

[0050] Reference Figure 2 and Figure 4 The electro-liquid separation device 110 includes a first insulating pipeline 111 and a first electrical connector. The first insulating pipeline 111 and the first electrical connector are two separate components. In one embodiment of the present application, the first electrical connector includes a first ring body 112 and a first connector 113.

[0051] When the electro-liquid separation device 110 is connected between the first wire rod unit 13 and the jumper wire 4, one end of the first insulating pipeline 111 is connected to the hollow wire of the first wire rod unit 13, and the other end is connected to the end of the jumper wire 4, so that the phase-change working fluid can enter the jumper wire 4 through the first insulating pipeline 111, thereby connecting the first flow channel and the third flow channel. Optionally, a junction box 114 is also provided between the first insulating pipeline 111 and the hollow wire of the first wire rod unit 13, so that during the circulation of the phase-change working fluid, the liquid phase working fluid or the gas-liquid two-phase working fluid in the first flow channel is first collected in the junction box 114, and then enters the jumper wire 4 through the first insulating pipeline 111. In this way, the junction box 114 is provided between the first insulating pipeline 111 and the hollow wire of the first wire rod unit 13, and can reasonably collect the working fluid from multiple hollow wires, effectively solving the problem of liquid connection between multiple hollow wires and the first insulating pipeline 111.

[0052] The first ring body 112 is disposed around the outside of the hollow wire and the solid wire of the first wire rod unit 13, "wrapping" the first wire rod unit 13 tightly, so that the inner surface of the first ring body 112 fits the first wire rod unit 13, thereby not only realizing the electrical connection between the first ring body 112 and the first wire rod unit 13, but also restraining the wire bundle at the end of the first wire rod unit 13. The first connector 113 can be an L-shaped connector, one end of which is fixedly connected to the first ring body 112, and the other end is fixedly connected to the jumper wire 4, thereby realizing electrical conduction among the first wire rod unit 13, the first ring body 112, the first connector 113 and the jumper wire 4.

[0053] Similarly, when the electro-hydraulic separator 110 is connected between the first wire rod unit 13 and the main collector ring 3, one end of the first insulating pipeline 111 is connected to the hollow wire of the first wire rod unit 13, and the other end is connected to the end of the main collector ring 3, so that the first flow channel and the second flow channel are connected. The connection method and technical effect of the electro-hydraulic separator 110 at this position are similar to the above-mentioned scenario of application in the jumper line 4, and this application will not be repeated here.

[0054] It can be understood that based on the circuit connection within the generator, for the jumper wire 4, both ends thereof are connected to the corresponding first wire rod unit 13 through the electro-hydraulic separation device 110, and for the main collector ring 3, one end of the second flow channel inside it is a closed device, and this end is connected to an external electrical device to achieve energy storage. Therefore, the main collector ring 3 is connected to the corresponding first wire rod unit 13 only at its end close to the stator winding 1 through the electro-hydraulic separation device 110.

[0055] Reference Figure 2 and Figure 5, the pipeline system also includes a second insulating pipeline 120, one end of which is connected to the hollow wire of the second wire rod unit 14, and the other end can be connected to the main bus ring 3 or the jumper wire 4. It can be understood that when the second insulating pipeline 120 is connected to the main bus ring 3, the first flow channel is connected to the second flow channel, and the phase-changing working medium flows through the first flow channel through the third flow channel and the second flow channel in sequence, and finally flows back to the condenser 2; when the second insulating pipeline 120 is connected to the jumper wire 4, the first flow channel is connected to the third flow channel, and the phase-changing working medium directly enters the second flow channel through the first flow channel, and finally flows back to the condenser 2. Regardless of which of the above methods is used, the self-circulation of the working medium can be achieved, and this application does not limit this.

[0056] Similarly, a junction box 114 is also provided between the second insulating pipe 120 and the hollow conductor of the second wire bar unit 14 . The connection and function of the junction box 114 at this position are similar to those described above, and are not described in detail in this application.

[0057] Reference Figure 2 and Figure 6 , the pipeline system also includes a third insulating pipeline 130 and a second electrical connector 140. One end of the third insulating pipeline 130 is connected to the hollow conductor of the third wire rod unit 15, and the other end is connected to the jumper wire 4 or the main merge ring 3. Similarly, a junction box 114 is arranged between the third insulating pipeline 130 and the hollow conductor of the third wire rod unit 15. The difference from the above-mentioned first wire rod unit 13 and second wire rod unit 14 is that the junction box 114 here connects the two third wire rod units 15 in each stator slot. When the third insulating pipeline 130 is connected to the jumper wire 4, the phase-change working fluid in the first flow channel flows through the third flow channel and the second flow channel in sequence; when the third insulating pipeline 130 is connected to the main merge ring 3, the phase-change working fluid in the first flow channel directly enters the second flow channel.

[0058] It should be noted that the third insulating pipeline 130 only realizes the fluid connection between the third wire bar unit 15 and the main bus ring 3 or the jumper wire 4. The second electrical connector 140 is connected between two radially adjacent third wire bar units 15 (i.e., two third wire bar units 15 in the same stator slot), and the electrical connection between the third wire bar units 15 is realized through the second electrical connector 140.

[0059] Optionally, the second electrical connector 140 includes two second ring bodies 141 and one second connector 142, the two second ring bodies 141 respectively surround the outer sides of the hollow wires and solid wires of two radially adjacent third wire bar units 15, and play a binding role on the wire harness at the end of the third wire bar unit 15, while the inner surface of the second ring body 141 fits the third wire bar unit 15 to achieve electrical connection between the third wire bar unit 15 and the second ring body 141. The second connector 142 connects two radially adjacent second ring bodies 141 to achieve electrical connection between the two second ring bodies 141, so that the third wire bar units 15 can be connected in series.

[0060] Reference Figure 2 , the jumper wire 4 is connected to the main collector ring 3 through the fourth insulating pipeline 150, and in one embodiment of the present application, the fourth insulating pipeline 150, the third insulating pipeline 130 and the second insulating pipeline 120 all extend along the radial direction of the generator, so as to shorten the flow path of the phase-change working medium to the maximum extent, and reduce the pressure loss caused by the turning process of the fluid flow, which is beneficial to the circulation efficiency of the working medium. It should be noted that the "extending along the radial direction of the generator" mentioned above is not limited to the radial line of the generator, and the projections of the fourth insulating pipeline 150, the third insulating pipeline 130 and the second insulating pipeline 120 in the radial plane of the generator can coincide with the radial line of the generator.

[0061] Specifically, the third insulating pipeline 130 is divided into two parts. The third insulating pipeline 130 located in the cross-over area of ​​any jumper wire 4 is connected to the jumper wire 4, and the third insulating pipeline 130 located between adjacent jumper wires 4 is connected to the main collector ring 3, so that the third insulating pipeline 130 can extend radially along the generator.

[0062] As mentioned above, the present application connects the piping system between the stator winding 1, the main collector ring 3 and the jumper wire 4 so that the first flow channel in the stator winding 1, the second flow channel in the main collector ring 3 and the third flow channel in the jumper wire 4 form a fluid path system that is interconnected. In this way, during the operation of the generator, for the circulation system of the phase-change working fluid, the main collector ring 3 and the jumper wire 4 are located downstream of the stator winding 1, and the phase-change working fluid from the condenser 2 first passes through the stator winding 1, and then passes through the jumper wire 4 or the main collector ring 3. In this way, the stator winding 1 and the fluid path system of the collector ring can be merged, and there is no need to separately set a gas collecting ring above the stator winding 1, and functional components such as the fluid path joint are omitted. At the same time, the stator winding 1 and the collector ring can share a set of condensers 2, which not only simplifies the fluid path structure and reduces the difficulty of system maintenance, but also saves space.

[0063] On the other hand, since the phase-change working medium first flows through the stator winding 1 and then flows through the slip ring during the circulation process, the working medium can be utilized in a step-by-step manner according to the heating values ​​of the stator winding 1 and the slip ring, so that the cooling capacity of the working medium can be fully utilized.

[0064] In one embodiment of the present application, the height of the jumper wire 4 is lower than the height of the main collector ring 3, which will be beneficial to the rise of bubbles during the boiling process of the working medium, thereby providing a circulating pressure head for the flow of the working medium. It should be noted that the above method is only an optional embodiment of the present application. In actual applications, in order to reduce the overall height of the collector ring, the jumper wire 4 and the main collector ring 3 can also be at the same height. Those skilled in the art can make adaptive adjustments according to actual application requirements, and the changes made to this height adjustment should be within the scope of protection of the present application.

[0065] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A generator based on phase change cooling, characterized in that: include: A stator winding (1), wherein each wire rod unit is formed with a first flow channel for a phase-changing working medium to pass through; A main slip ring (3) is arranged around the stator winding (1) and is located above the stator winding (1), a second flow channel for the phase-change working medium to pass through is formed in the main slip ring (3), and the main slip ring (3) is electrically connected to each branch of the stator winding (1); A jumper wire (4) is located between the main collector ring (3) and the stator winding (1), a third flow channel for the phase-changing medium to pass through is formed in the jumper wire (4), the third flow channel is connected to the second flow channel, and the jumper wire (4) is used to connect multiple pole phase groups of the same phase of the stator winding (1) in series; A condenser (2) located above the main slip ring (3), the condenser (2) being connected to the main slip ring (3) and the stator winding (1) respectively; A pipeline system is connected between the first flow channel, the second flow channel and the third flow channel, so that after the phase change working medium in the condenser (2) enters the first flow channel, it can enter the third flow channel and the second flow channel in sequence along the first flow channel, or directly enter the second flow channel along the first flow channel.

2. The generator according to claim 1, characterized in that: The liquid circuit system comprises an electro-hydraulic separation device (110), the stator winding (1) comprises a first wire rod unit (13) located at the end of any pole phase group and the end of any branch, and the electro-hydraulic separation device (110) comprises a first insulating pipeline (111) and a first electrical connector; When the electro-hydraulic separation device (110) is connected between the first wire rod unit (13) and the jumper wire (4), one end of the first insulating pipeline (111) is connected to the hollow wire of the first wire rod unit (13), and the other end is connected to the end of the jumper wire (4) to connect the first flow channel and the third flow channel, and the two ends of the first electrical connector are electrically connected to the first wire rod unit (13) and the jumper wire (4) respectively; When the electro-hydraulic separation device (110) is connected between the first wire rod unit (13) and the main collector ring (3), one end of the first insulating pipeline (111) is connected to the hollow wire of the first wire rod unit (13), and the other end is connected to the end of the main collector ring (3) to connect the first flow channel and the second flow channel, and the two ends of the first electrical connector are electrically connected to the first wire rod unit (13) and the main collector ring (3) respectively.

3. The generator according to claim 2, characterized in that: The first electrical connector comprises: A first ring body (112) surrounds the outer sides of the hollow wire and the solid wire of the first wire rod unit (13), and the inner surface of the first ring body (112) is in contact with the first wire rod unit (13); A first connecting member (113) has one end connected to the first ring body (112) and the other end connected to the jumper wire (4) or the main bus ring (3).

4. The generator according to claim 2, characterized in that: The stator winding (1) comprises a second wire rod unit (14), wherein the second wire rod unit (14) and the first wire rod unit (13) are located in the same stator slot; The pipeline system further comprises a second insulating pipeline (120), one end of the second insulating pipeline (120) being connected to the hollow conductor of the second wire rod unit (14), and the other end of the second insulating pipeline (120) being connected to the main collector ring (3) or the jumper wire (4) so ​​as to connect the first flow channel with the second flow channel or the third flow channel.

5. The generator according to claim 4, characterized in that: The stator winding (1) comprises a third wire rod unit (15), and along the circumferential direction of the stator winding (1), the third wire rod unit (15) is located between any adjacent first wire rod units (13); The pipeline system further comprises a third insulating pipeline (130) and a second electrical connector (140); one end of the third insulating pipeline (130) is connected to the hollow conductor of the third wire rod unit (15), and the other end is connected to the jumper wire (4) or the main collector ring (3) to connect the first flow channel with the second flow channel or the third flow channel; the second electrical connector (140) is connected between two radially adjacent third wire rod units (15).

6. The generator according to claim 5, characterized in that: The second electrical connector (140) comprises: Two second ring bodies (141), which respectively surround the outer sides of the hollow wire and the solid wire of the third wire rod unit (15), and the inner surface of the third ring body is in contact with the third wire rod unit (15); A second connecting member (142) connects two adjacent second ring bodies (141).

7. The generator according to claim 4, characterized in that: The third insulating pipelines (130) all extend along the radial direction of the generator.

8. The generator according to claim 4, characterized in that: The third insulating pipe (130) located in the cross-over area of ​​any jumper wire (4) is connected to the jumper wire (4); and / or The third insulating pipeline (130) located between adjacent jumper wires (4) is connected to the main collector ring (3).

9. The generator according to claim 4, characterized in that: A junction box (114) is provided between the first insulating pipeline (111) and the first wire rod unit (13), between the second insulating pipeline (120) and the second wire rod unit (14), and between the third insulating pipeline (130) and the third wire rod unit (15).

10. The generator according to any one of claims 1 to 9, characterized in that: The height of the jumper wire (4) is lower than the height of the main slip ring (3).

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