Cable bushing
The through-guide assembly with a conical insulator and conductor interaction, thermo-pressed fit, and redundant sealing mechanisms addresses sealing and structural challenges, ensuring durability and reliability in high-pressure environments.
Patent Information
- Application Number
- HK62026124857
- Authority / Receiving Office
- HK · HK
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-04-28
- Filing Date
- 2026-06-16
- Publication Date
- 2026-07-31
AI Technical Summary
Existing through-guide assemblies for wet rotor motors in high-pressure environments face challenges with sealing and structural space efficiency, as well as potential breakage and fluid leakage under adverse conditions.
A through-guide assembly with a conical insulator and conductor interaction, thermo-pressed fit, and redundant sealing mechanisms, utilizing high-performance plastics like PEEK and metallized structures, along with crimped connections, to ensure compactness, durability, and effective sealing.
The solution provides a compact, durable, and reliable current supply system that minimizes structural space, reduces sealing points, and enhances protection against breakage and leakage, maintaining effective conductivity under high pressure and temperature conditions.
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Abstract
Description
(19) State Intellectual Property Office (12) Invention Patent Application (10) Application Publication Number (43) Application Publication Date (21) Application Number 202480028123.8 (22) Application Date 2024.04.25 (30) Priority Data 102023111030.6 2023.04.28 DE (85) PCT International Application Entering National Phase Date 2025.10.24 (86) PCT International Application Application Data PCT / EP2024 / 061409 2024.04.25 (87) PCT International Application Publication Data WO2024 / 223748 DE 2024.10.31 (71) Applicant KSB GmbH Address Frankenthal, Germany (72) Inventor P. Hauk R. Meyer S. Altmann (74) Patent Agency China Patent Agency (Hong Kong) Limited 72001 Patent Attorney Liang Jing, Zou Longhui (51) Int.Cl. F04D 13 / 06 (2006.01) H02K 5 / 22 (2006.01) H02K 7 / 14 (2006.01) H02K 5 / 132 (2006.01) (54) Invention Title: Line Pass-through Guide (57) Abstract: This invention relates to a pump unit having a pump (1) driven by a wet rotor motor (2). The wet rotor motor (2) is surrounded by a motor housing (3), wherein the motor housing (3) includes a pass-through guide assembly (4) for supplying current to the wet rotor motor (2). The pass-through guide assembly (4) has an opening (6) at a component (5) of the motor housing (3), and each line pass-through guide (7) is fixedly arranged in the opening by means of a retaining element (8). The line-through guide (7) has a conductor (9) and an insulator (10). The insulator (10) has at least a partially tapered surface that interacts with the conductor (9).Claims 1 page Description 6 pages Drawings 4 pages CN 121175495 A 2025.12.19 CN 1 21 17 54 95 A 1. A pump unit having a pump (1) driven by a wet rotor motor (2), - wherein the wet rotor motor (2) is surrounded by a motor housing (3), - wherein the motor housing (3) includes a through guide assembly (4) for supplying current to the wet rotor motor (2), and the through guide assembly (4) has an opening (6) at a part (5) of the motor housing (3), each of a line through guide (7) being fixedly arranged in the opening by means of a retaining element (8), - wherein each of the line through guides (7) has a conductor (9) and an insulator (10), characterized in that the insulator (10) has at least partially a conical surface that interacts with the conductor (9). 2. The pump unit according to claim 1, wherein the conductor (9) has at least a partially conical surface. 3. The pump unit according to claim 1 or 2, wherein the conductor (9) comprises a rod-shaped component (11) and a component in the shape of a double cone (12). 4. The pump unit according to any one of claims 1 to 3, wherein the insulator (10) is configured to be thermofitted onto the conductor (9). 5. The pump unit according to any one of claims 1 to 4, wherein the conical surface of the insulator (10) interacts with the conical surface of the conductor (9). 6. The pump unit according to any one of claims 1 to 5, wherein the insulator (10) is made of high-performance plastic. 7. The pump unit according to any one of claims 1 to 6, wherein the insulator (10) has a metallized structure. 8. The pump unit according to any one of claims 1 to 7, wherein the line-through guide (7) has a field control element (45). 9. The pump unit according to any one of claims 1 to 8, characterized in that at least one first sealing ring (35) and a second sealing ring (37) are arranged at the line through guide (7). 10. The pump unit according to any one of claims 1 to 9, characterized in that the conductor (9) has a connection portion (15) for connecting line (27) to the stator winding (24) of the wet rotor motor (2), wherein the connection portion (15) is configured as a press-fit connection portion.11. A method for manufacturing a pump unit having a pump (1) driven by a wet rotor motor (2), wherein a through-guide assembly (4) for supplying current to the wet rotor motor (2) includes a through-guide section (7) having a conductor (9) and an insulator (10), characterized in that the insulator (10) is thermo-pressed onto the conductor (9). 12. Use of a pump unit having a pump (1) in a power plant circuit with high system pressure for sealing the current supply section of the wet rotor motor (2) by means of the through-guide section (7) to prevent high system pressure. Claims 1 / 1 page 2 CN 121175495 A Through-line Guide Technical Field
[0001] The present invention relates to a pump unit having a pump driven by a wet rotor motor, wherein the wet rotor motor is surrounded by a motor housing, wherein the motor housing includes a through-line guide assembly for supplying current to the wet rotor motor, and the through-line guide assembly has an opening at a component of the motor housing, each of which is fixedly arranged in the opening by means of a retaining element, wherein each of the through-line guides has a conductor and an insulator. Background Art
[0002] Such pump units can be used, for example, in the construction of power plants. The housing component forms a pressure sheath that defines an internal space relative to the surrounding atmosphere. Pressure sheaths are typically designed for very high system pressures.
[0003] An exemplary device is described in EP 1 910 685 B1. The device includes a pump driven by a motor filled with liquid. The motor has a housing that is part of the pressure sheath.
[0004] Circulation pumps without shaft seals are also called stuffing box-less circulation pumps and are typically vertical pumps driven by wet rotor motors with or without clearance tubes.
[0005] Wet rotor motors are typically asynchronous short-circuit rotor motors, whose rotating parts and supports operate in the conveying medium. Special care is required during the construction, assembly, and startup of wet rotor motors to reliably fill and vent the internal space of the motor, and to keep solids in the conveying medium away from the liquid-lubricated sliding bearings.
[0006] Here, the pump and motor are housed in a common pressure-resistant housing with a heat shield between the pump and motor components. The heat shield can be implemented as an active or passive component element and allows temperatures of up to 420°C for the conveying medium. The bearings are lubricated by the conveying medium and, moreover, no dynamic seal is required.
[0007] The wet rotor motor is completely filled with liquid. The stator and windings, including the supply joints, are also in the liquid, along with the rotating parts and their supports. The prerequisite is water-resistant and pressure-sealed insulation for all components subjected to the operating voltage. Wet rotor motors are used as drive motors for stuffing box-less circulating pumps in conventional power plants.
[0008] In conventional through-guide assemblies used for supplying current to wet rotor motors, the insulation can be constructed in two pieces. This insulation consists of an inner insulator and an outer insulator.
[0009] A through-guide assembly is known from US 3,043,903 A, which has a single insulator surrounding the conductor.
[0010] JP S55 15968 U describes an insulating element mounted at a cable that guides a cable through a through-guide opening in the body of an electrical device. A flange-like protrusion is constructed in a section of the insulating element that abuts against a shoulder constructed in the device body and is secured by means of a fastening sleeve.
[0011] In known through-guide assemblies, the inner insulator forms a pressure-bearing component. An outer insulator is arranged above the inner insulator. In their combined action, these two insulators require a very long overlap to achieve the required electrical clearance. This increases the structural space. Metal rings are used for protection under high loads. The metal ring requires additional sealing and will heat up due to eddy currents.
[0012] DE 10 2014 209 517 A1 discloses an apparatus having a pump driven by a wet rotor motor. The apparatus has a housing that includes a through guide assembly for supplying current to the wet rotor motor. The through guide assembly has wiring elements and an insulator. The through guide assembly includes a force transmission element. Specification 1 / 6 pages 3 CN 121175495 A
[0013] The weakness of the through guide for the wiring of wet rotor motors, especially under high fluid pressure, is the sealing relative to ambient pressure and the protection against breakage in accidental situations. Summary of the Invention
[0014] The object of the present invention is to provide a pump unit having a pump and having a through guide that is constructed very compactly. Furthermore, the through guide should ensure a high degree of safety and occupy as little structural space as possible. As few sealing points as possible are required here.
[0015] This objective is achieved according to the invention by a pump unit having a pump according to the features of claim 1. Preferred variations can be obtained from the parallel independent claims, dependent claims, description, and drawings.
[0016] According to the invention, the insulator has at least a partially conical surface that interacts with the conductor.
[0017] A cone is a geometric body that occurs when all points of a bounded and continuous surface segment in a plane are connected to points outside the plane by straight lines. In the special case of a circular surface segment, the body is also called a cone. If the axis is perpendicular to the base plane, a right circular cone exists.
[0018] Ideally, the conical surface of the insulator is constructed as a partial surface of a right circular cone.
[0019] Preferably, the conductor has at least a partially conical surface.In a particularly advantageous variant of the invention, the conical surface of the conductor is constructed as a partial surface of a straight circular cone.
[0020] Advantageously, the conical surface of the conductor and the conical surface of the insulator work together. In a particularly advantageous variant of the invention, the conical surface of the conductor and the conical surface of the insulator are constructed as corresponding acting surfaces.
[0021] Preferably, the conductor includes a rod-shaped component and a component in the shape of a double cone. The conductor is preferably constructed as an elongated, substantially columnar rod, at the end of which a connection portion for a connecting line to the stator winding is arranged. Advantageously, a thickened portion in the shape of a double cone is constructed at the end of the conductor and in front of the connection portion with the connecting line, the thickened portion forming the conical surface of the conductor.
[0022] Ideally, the insulator is constructed to be thermofitted onto the conductor. Here, the shrinkage composite structure extends substantially along the length of the rod-shaped component of the conductor and extends toward the transition portion toward the double cone. Here, the conical surface of the insulator and the conical surface of the conductor form a particularly stable end component of the shrinkage composite structure. Ideally, the insulator is subjected to significantly less mechanical load through thermocompression fitting at the double cone, and is thus designed to be more durable in operation.
[0023] Furthermore, thermocompression fitting of the insulator to the conductor provides advantageous anti-torsion, especially compared to the bonding joints used to date.
[0024] Ideally, the conical surface of the insulator and the conical surface of the conductor work together. This working together is caused by thermocompression fitting of the insulator to the conductor. Additionally, at the transition of the conical surface, a sealing O-ring is embedded in the conductor, so that if the conical surface of the insulator suffers damage to the joint on the conical surface of the conductor, there is redundant protection against fluid leakage.
[0025] Advantageously, a thickened portion in the shape of a double cone is constructed at the end of the conductor and in front of the connection with the connecting wire, which forms the conical surface of the conductor. This double cone provides advantageous protection against breakage or penetration of the conductor's through-line guide.
[0026] In a particularly advantageous variant of the invention, the insulator is made of a high-performance plastic. High-performance plastics are a subclass of thermoplastics, which are advantageously distinguished from technical plastics and standard plastics, particularly by their thermal stability, but also by their chemical resistance and mechanical properties.
[0027] In a very particularly advantageous variant of the invention, the insulator is made of polyetheretherketone (PEEK). Specification 2 / 6 pages 4 CN 121175495 A
[0028] Polyetheretherketone is a high-temperature resistant thermoplastic and belongs to the polyaryletherketone material class. The melting temperature of this polyetheretherketone is 335°C. PEEK is resistant to almost all organic and inorganic chemicals, high-energy electromagnetic waves (such as gamma radiation, X-ray radiation), and is also resistant to hydrolysis up to about 280°C.PEEK is preferred as an insulating material in high-voltage technology because it has good insulation resistance and a low dielectric loss coefficient.
[0029] Preferably, the insulator has an elongated shape with an internal cylindrical cavity. A conductor is introduced into the cavity, and the insulator is thermo-pressed onto the conductor. A thickened portion is preferably arranged in the middle part of the insulator, which is configured as a support for the circuit guide with respect to the opening of the housing. For this purpose, the thickened portion has a first opening for realizing an O-ring in the direction of the housing opening, which serves to seal the circuit guide in the housing opening.
[0030] Additionally, the thickened portion of the insulator has another opening in the middle of the thickened portion, into which another O-ring for sealing can be realized. This second O-ring is advantageously configured as a redundant sealing portion for the circuit guide in the housing opening. In adverse accident scenarios involving both very high pressure and elevated temperatures, the additional O-ring can maintain the sealing effect after the first O-ring loses its sealing effect. The placement of the second O-ring is designed such that there is no direct contact initially, and no significant contact with hot liquid in the event of damage to the first O-ring.
[0031] Furthermore, the thickened portion has a support for the ring on the side opposite to the O-ring, and the ring is constructed as a breakage protection device. Ideally, this ring can be implemented as a metal ring, wherein the metal material, such as brass or iron, is made non-magnetic. High-temperature resistant plastics are also suitable. In the event of a so-called breakage, that is, when the insulator breaks and the conductor is ejected from the through-line guide, the breakage protection ring, combined with the double-conical component of the conductor, prevents actual breakage or penetration and advantageously seals the fluid pressure present in the wet rotor motor. This structure protects the conductor from ejection from the housing and prevents significant leakage along the conductor.
[0032] In an advantageous variant of the invention, the insulator has a metallized structure.
[0033] For this purpose, the metallization structure is preferably implemented in the form of a substituent nickel layer, which achieves reproducible conductivity through a predetermined layer thickness. The nickel layer is preferably applied in the internal hollow cylinder of the insulator. This represents a significant improvement in reproducible conductivity, especially compared to other known manually applied conductive paints.
[0034] The combination of the thermo-pressed fit of the insulator and the metallization structure on the inner side of the insulator achieves gapless and airless contact between the conductor and the insulator. Therefore, partial discharge due to the implementation of the through-line guide is particularly effectively avoided or significantly reduced.
[0035] Compared to known through-line guides, the through-line guide according to the present invention requires neither sealing tape nor conductive varnish nor adhesive, thereby enabling an extremely robust connection between the conductor and the insulator, which also has improved field control characteristics.
[0036] Ideally, the through-line guide has a field control varnish or field control element. In an advantageous variant of the invention, the through-line guide has a field control element, thereby significantly reducing the maximum field strength and simultaneously increasing the partial discharge initiation voltage.
[0037] So-called field control includes all measures designed to reduce the local electric field strength to such an extent that it does not exceed the electric strength of the insulating material and the interface at any location.
[0038] The field control varnish or field control element has, for example, a significantly improved dielectric constant compared to the insulator, thereby enabling a targeted reduction of the original field strength.
[0039] In an advantageous variant of the invention, the through-line guide has an additional external insulator. Instruction manual, page 3 / 6, CN 121175495 A. Preferably, an additional external insulator is positioned above the thermo-pressed insulator and within a non-magnetic threaded sleeve that secures the wire-through guide in an opening in the housing. Additionally, the external insulator can be aligned at its upper end using a fixing element. Preferably, the threaded sleeve is implemented with an M64 external thread.
[0040] Preferably, the conductor has a connection portion with the connecting wire to the stator winding of the wet rotor motor. In an advantageous variant of the invention, the connection portion is constructed as a press-fit connection.
[0041] A press-fit connection is a connection between two components that utilizes friction between the two components. Press-fit connections belong to the force-locking connection of joining technology and are standardized by DIN 8593.
[0042] Preferably, the conductor has a connection portion with a plastic-insulated connecting wire to the stator winding of the wet rotor motor. In an advantageous variant of the invention, the connection portion is constructed as a press-fit connection.
[0043] In an advantageous variant of the invention, the conductor has a protrusion constructed as a hollow cylinder.
[0044] Ideally, the stator winding has at least one wire end that is inserted into the hollow cylinder. Here, the wire end of the plastic-insulated connecting wire is insulated with a polyethylene insulation portion up to the section inserted into the hollow cylinder.
[0045] Advantageously, the hollow cylinder of the conductor and the wire end of the connecting wire of the stator winding have a force-locking connection.
[0046] In a particularly advantageous variant, the connection, especially the crimp connection, is implemented as a crimped connection.
[0047] "Crimp" is understood as a joining method in which two components are connected to each other by plastic deformation, for example by crimping, extrusion, curling, or folding.The crimped connection can only be loosened to a limited extent and can only be repaired using suitable tools during maintenance.
[0048] During crimping, a gas-sealed connection is achieved when performed correctly. A structure is created by deforming the crimping sleeve and the connecting wire in the form of a hollow cylindrical protrusion of a conductor, which is essentially isolated from oxygen and thus protected internally as much as possible from corrosion.
[0049] Ideally, the connecting wire and the protrusion of the conductor are made of the same material, preferably copper. Copper is a near-ideal conductor, especially for use in wet rotor motors. The copper-based crimped connection achieves excellent and near-non-destructive conductivity.
[0050] Advantageously, the hollow cylindrical protrusion of the conductor is ideally integrated with the connecting bolt, which is implemented integrally with the conductor. Therefore, no additional components are required, thereby saving additional assembly costs and avoiding line losses due to the use of additional components. It is advantageous to realize the crimped connection between the connecting wire and the conductor directly.
[0051] Preferably, the columnar connecting wire or winding wire in the form of a connecting line is directly introduced into the protruding columnar cavity below the double cone of the conductor and ideally electrically connected in a force-locking manner.
[0052] Compared with known through-line guides for wet rotor motors, soldering is not required. Therefore, excessive heat input to the connection is avoided, thereby the conductive connection is not subjected to load and the insulation does not age. In addition, solder, which is not always ideally conductive, can be omitted.
[0053] In an advantageous variant of the invention, the connection includes at least four, preferably at least six, outer surfaces, wherein each pair of outer surfaces is arranged opposite each other. The crimp connection preferably deforms the columnar protrusion of the conductor into a hexagon, thereby force-locking the introduced columnar connecting wire in the protrusion of the conductor.
[0054] In an advantageous variant of the invention, the through-line guide assembly includes three through-line guides. In an alternative variant, six line-through guides can also be implemented in the through-guide assembly.
[0055] According to the invention, a pump unit is manufactured in one method having a pump driven by a wet rotor motor, (Page 4 / 6, CN 121175495 A) wherein the through-guide assembly for supplying current to the wet rotor motor includes at least one line-through guide having a conductor and an insulator, wherein in the method, the insulator is thermo-pressed onto the conductor.
[0056] According to the invention, the pump unit with the pump is used in power plant circuits with high system pressure to seal the current supply of the wet rotor motor by means of the line-through guide to prevent high system pressure. Brief Description of the Drawings
[0057] Further features and advantages of the invention are apparent from the description of embodiments according to the drawings and from the drawings themselves.
[0058] Here: FIG1 shows a cross-sectional view of the motor pump unit, FIG2 shows a perspective view of the through guide assembly, FIG3 shows a cross-sectional view of the through guide assembly, and FIG4 shows a cross-sectional view of the through guide portion. Detailed Description
[0059] FIG1 shows a motor pump unit with a wet rotor motor 2. The motor housing 3 forms a pressure sleeve component. The interior of the wet rotor motor 2 is filled with liquid and has a heat-insulating element 25. A cooling system 17 is provided to dissipate electrical power loss. The wet rotor motor 2 includes two radial bearings 13, 14 and an axial bearing 40.
[0060] The driving force of the wet rotor motor 2 acts on the shaft system 18 and thereby transmits torque to the pump 1. The pump 1 includes a pump housing 19 in which a rotating wheel 20 and a conductive device 21 are arranged. The pump housing 19 is connected to the motor housing 3 by at least four tie rods 22.
[0061] The motor housing 3 and the pump housing 19 together form a pressure sleeve. This pressure sleeve is designed for high system pressures.
[0062] The wet rotor motor 2 shown in the embodiment is completely filled with liquid. The stator winding 24 and stator winding head 16, including the supply connector, are also submerged in liquid, along with the rotating component 23 and its support. To supply current to the wet rotor motor 2, a through-guide assembly 4 is provided in the motor housing 3. For this purpose, plastic-insulated copper wires 27 (which in this embodiment have polyethylene insulation) are connected from the multilayer coils of the stator winding 24 to the through-guide assembly 7 via a connection portion 15.
[0063] The through-guide assembly 4 includes a component 5 formed by a flange-shaped protrusion. The component 5 is integrally formed with the motor housing 3, thereby enabling it to withstand high fluid pressure. The component 5 of the motor housing 3 has openings 6, each into which a through-guide assembly 7 is arranged. The number of openings 6 corresponds to the number of through-guide 7 required for operating the wet rotor motor 2. As can be seen from Figure 4, each of the openings 6 has a section 43 with a reduced inner diameter and a section 42 with an increased inner diameter.
[0064] A junction box 28 is arranged at the through guide assembly 4, into which the line through guide 7 passes. A bracket 29 is positioned in the junction box 28 for mechanical decoupling of the so-called conductive extension strip 30. The bracket 29 is implemented as an epoxy resin insulator in this embodiment.
[0065] Figure 2 shows a perspective view of the through guide assembly 4 having three line through guides 7. As can be seen in conjunction with Figure 3, the line through guides 7 are fixedly arranged in the openings 6 of the component 5 of the motor housing 3 by means of a retaining element 8. An external insulator 26 covers the retaining element 8. For this purpose, the external insulator 26 is inserted into the internal insulator 10 and fixed above by a disc 32 and a nut 31.
[0066] The retaining element 8 is implemented, for example, as a non-magnetic threaded sleeve with an M64 external thread. The junction box 28, in the embodiment shown on pages 5 / 6 of the specification 7 CN 121175495 A, is placed directly on the flange-like protrusion of the component 5 of the motor housing 3. Three through-line guides 7 pass into the junction box 28 and each has a connection to a conductive extension strip 30, which in turn connects to a bracket 29 for mechanical decoupling.
[0067] FIG4 shows a detailed cross-sectional view of the through-line guides 7. The through-line guides 7 include a conductor 9 having a rod-shaped component 11 and a double cone 12. The double cone 12 realizes the conical surface of the conductor 9, which is constructed as a partial surface of a straight circular cone. The conductor 9 is essentially constructed as an elongated, columnar rod, at the end of which (reference numeral 44) is a (not shown) connection to a copper conductor 27, which is plastic-insulated from the stator winding 24. The tapered surface of the conductor 9 interacts with the tapered surface of the insulator 10, forming corresponding action surfaces 41.
[0068] The insulator 10 is made of polyetheretherketone (PEEK) and is configured to be thermofitted onto the conductor 9. Here, the shrinkage composite structure extends at least half the length of the rod-shaped member 11 of the conductor 9 and leads to the transition towards the double cone 12. Through the thermofitting at the double cone 12, the composite structure consisting of the insulator 10 and the conductor 9 is subjected to significantly less mechanical load and is thus designed to be more durable in operation.
[0069] The insulator 10 has a metallized structure in the form of a substituted nickel layer applied within the hollow column inside the insulator 10. Reproducible conductivity is thus achieved with a predetermined layer thickness.
[0070] The line guide 7 has an additional external insulator 26 and is positioned above the thermo-fitted insulator 10 and within a non-magnetic threaded sleeve 8, which secures the line guide 7 in the opening 6 of the housing 3. The external insulator 26 is aligned at its upper end using a disc 32 and a nut 31. The threaded sleeve 8 is provided with external threads. The spacer sleeve 46 is made of PEEK and positions the field control element 45.
[0071] A thickened portion 33 is arranged in the middle part of the insulator 10, which is configured as a support for the line guide 7 in the opening 6 of the housing 3.
[0072] For this purpose, the thickened portion 33 has a first clearance or chamfer 34 in the region of the section 42 of the opening 6 of the housing 3 for realizing the first O-ring 35, which serves to seal the line guide 7 in the opening 6 of the housing 3.
[0073] Additionally, the thickened portion 33 of the insulator 10 has a second void 36 in the form of a radially circumferential groove in the middle of the thickened portion 33, into which a second O-ring 37 for sealing can be realized.The second O-ring 37 is advantageously configured as a redundant seal in the opening 6 of the wiring guide 7 in the housing 3. In adverse accident conditions where there is both very high pressure and increased temperature, the second O-ring 37 can maintain the sealing effect after the sealing effect of the first O-ring 35 is lost.
[0074] The thickened portion 33 has a support for a ring 38 on the side opposite to the first O-ring 35, which is constructed as a breakage protection device. The ring 38 is implemented as a metal ring. The metal ring is preferably constructed as a brass ring or a ring made of non-magnetic iron. In the event of a so-called breakage, that is, when the insulator 10 breaks and the conductor 9 is pressed out of the wiring guide 7, the breakage protection ring 38 prevents the conductor 9 from coming out of the insulator 10 in combination with the double cone 12 of the conductor 9.
[0075] Additionally, at the transition between the conical surfaces of the insulator 10 and the conductor 9, a sealing third O-ring 39 is embedded in the conductor 9, thereby providing redundant protection against fluid leakage should the conical surface of the insulator 10 suffer damage to the connection on the conical surface of the conductor 9. (See Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6 / 4, Page 12, CN 121175495 A)
Claims
1. Pump aggregate with a pump (1) driven by a wet rotor motor (2), - wherein, - wherein the motor housing (3) comprises a feed-through guide assembly (4) for the current supply to the wet rotor motor (2) and the feed-through guide assembly (4) has an opening (6) at a component (5) of the motor housing (3) into which one line feed-through guide (7) is fixedly arranged by means of a holding element (8), - wherein the line feed-through guide (7) has one electrically conductive body (9) and one insulator (10), characterized in that the insulator (10) has at least partially a conical surface which cooperates with the electrically conductive body (9). the electrically conductive body (9) has at least partially a conical surface.
2. The pump assembly of claim 1, wherein, the electrically conductive body (9) comprises a rod-shaped component (11) and a component in the shape of a double cone (12).
3. The pump assembly of claim 1 or 2, wherein, the insulator (10) is configured to be press-fitted onto the electrically conductive body (9).
4. The pump assembly of any one of claims 1 to 3, wherein, the conical surface of the insulator (10) cooperates with the conical surface of the electrically conductive body (9).
5. The pump assembly of any one of claims 1 to 4, wherein, the insulator (10) is composed of a high-performance plastic.
6. The pump assembly of any one of claims 1 to 5, wherein, the insulator (10) has a metallized structure.
7. The pump assembly of any one of claims 1 to 6, wherein, the line feed-through guide (7) has a field control element (45).
8. The pump assembly of any one of claims 1 to 7, wherein, At least one first sealing ring (35) and a second sealing ring (37) are arranged at the line feed-through guide (7).
9. The pump assembly of any one of claims 1 to 8, wherein, the electrically conductive body (9) has a connection (15) to a connection line (27) of a stator winding (24) of the wet rotor motor (2), wherein the connection (15) is configured as a pressure connection.
10. The pump assembly of any one of claims 1 to 9, wherein, The feed-through guide assembly (4) for the current supply to the wet rotor motor (2) comprises a line feed-through guide (7) with an electrically conductive body (9) and an insulator (10), characterized in that the insulator (10) is press-fitted onto the electrically conductive body (9).
11. A method for manufacturing a pump assembly having a pump (1) driven by a wet- rotor motor (2), wherein 12. Use of a pump aggregate with a pump (1) in a power plant circuit with high system pressure for sealing the current supply of the wet rotor motor (2) by means of a line feed-through guide (7) against high system pressure.