An ultra-high temperature submersible motor stator insulation forming device

Abstract

The present invention relates to an ultra-high temperature submersible motor stator insulation forming device, which comprises: an ultra-high temperature insulation powder melting device and a stator winding insulation curing device, wherein the ultra-high temperature insulation powder enters the ultra-high temperature insulation powder melting device through a feed port, and the melted glue flows out from a liquid outlet and enters the stator winding insulation curing device; an internal heating device of the ultra-high temperature insulation powder melting device is arranged inside an external heating device, and a receiving cavity is formed between the two, and a stirring device is arranged in the receiving cavity; a built-in positioning system of the stator winding insulation curing device is arranged in the stator cavity of the ultra-high temperature submersible motor, and a thermal insulation system is arranged on the outer periphery of the stator shell; a sealing system is arranged at both ends of the stator cavity, and a liquid inlet and a sampling port for the circulation of the melted ultra-high temperature insulation powder are provided on the sealing system, a sealing flange sleeve of the sealing system is connected to a flange mechanism of the thermal insulation system through a bolt joint; and a temperature control system is connected to both ends of the stator cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of ultra-high temperature submersible electric pumps, in particular to an ultra-high temperature submersible motor stator insulation molding device. Background Art

[0002] Submersible electric pump units are generally composed of motors, protectors, separators, pumps and ground control equipment. They have the advantages of simple structure, easy use, long maintenance-free period and high oil yield. As an important mechanical oil production equipment, submersible electric pump units have been widely used in oil field production systems.

[0003] To adapt to the operating conditions of heavy oil production in my country's Bohai Bay, where the maximum ambient temperature reaches or exceeds 350°C, the temperature resistance of submersible motors must be improved accordingly. This necessitates the development of a targeted ultra-high-temperature submersible motor. Traditionally, motor stator insulation involves vacuum pressure impregnation, which struggles to meet the temperature resistance and operational requirements of ultra-high-temperature submersible motors. To improve the insulation performance of ultra-high-temperature submersible motors, ultra-high-temperature insulation materials are used to insulate the motor stators. These ultra-high-temperature insulation materials are solid granular or powdery at room temperature. First, these powders must be fully melted and injected into the stator windings. The insulation is then formed, and the stator as a whole must be placed in a high-temperature kiln for secondary curing. Therefore, there is an urgent need for an insulation curing device to achieve basic insulation forming of the stator windings of ultra-high-temperature submersible motors. Summary of the Invention

[0004] In response to the above problems, the purpose of the present invention is to provide an ultra-high temperature submersible motor stator insulation forming device. Through the two sets of internal and external heating oil circulation systems of the ultra-high temperature insulation powder melting device, the temperature difference of the entire melting chamber is ensured to be small, and the temperature of the melting chamber can be accurately controlled to ensure that the ultra-high temperature insulation powder can be fully melted; the stator winding is solidified and sealed by the stator winding insulation curing device to achieve basic insulation forming.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an ultra-high temperature submersible motor stator insulation molding device, comprising: an ultra-high temperature insulation powder melting device and a stator winding insulation curing device; the ultra-high temperature insulation powder melting device is provided with a feed inlet at the top and a liquid outlet at the bottom; ultra-high temperature insulation powder enters the ultra-high temperature insulation powder melting device through the feed inlet, and the melted glue flows out of the liquid outlet and enters the stator winding insulation curing device;

[0006] The ultra-high temperature insulating powder melting device includes an external heating device, an internal heating device, and a stirring device; the internal heating device is arranged inside the external heating device, and a receiving cavity for the ultra-high temperature insulating powder is formed between the internal heating device and the external heating device, and the stirring device is arranged in the receiving cavity;

[0007] The stator winding insulation curing device includes a built-in positioning system, a thermal insulation system, a sealing system and a temperature control system; the built-in positioning system is arranged in the stator inner cavity of the ultra-high temperature submersible motor, and the thermal insulation system is arranged on the outer periphery of the stator shell; the sealing system is arranged at both ends of the stator inner cavity, and the sealing systems at both ends are respectively provided with a liquid inlet and a sampling port for the circulation of melted ultra-high temperature insulating powder. The sealing flange sleeve of the above-mentioned sealing system is connected to the flange connection mechanism of the thermal insulation system through a bolt joint; the temperature control system is connected at both ends of the stator inner cavity.

[0008] Furthermore, the temperature control system includes a thermocouple, a circulating oil heating circulation system and a control cabinet; the circulating oil heating circulation system is connected to the ultra-high temperature insulation powder melting device, and the thermocouple is arranged in the sealing system of the stator winding insulation curing device to transmit the collected temperature information to the control cabinet, and the control cabinet controls the circulating oil heating circulation system and the ultra-high temperature insulation powder melting device according to the received temperature information.

[0009] Furthermore, the external heating device includes a first lower flange, a first upper flange, an external heating device inner barrel and an external heating device outer barrel; between the first lower flange and the first upper flange, the external heating device inner barrel and the external heating device outer barrel are welded in sequence from the inside to the outside, and an external heating device spiral oil channel is provided between the external heating device inner barrel and the external heating device outer barrel; an external heating device circulating oil inlet and an external heating device circulating oil outlet connected to the external heating device spiral oil channel are respectively provided at the bottom and top of the external heating device outer barrel; the liquid outlet passes through the external heating device outer barrel and the external heating device inner barrel, and is sealed between the external heating device inner barrel and the external heating device outer barrel.

[0010] Furthermore, the internal heating device includes an inner barrel of an internal heating device, an outer barrel of an internal heating device, an inner barrel base and an outer barrel base; the inner barrel of the internal heating device is welded to the inner barrel base, the outer barrel of the internal heating device is welded to the outer barrel base, the inner barrel base and the outer barrel base are welded together through a stopper, and the bottom of the inner barrel base is welded to the first lower flange of the external heating device; an internal heating device spiral oil channel is provided between the inner barrel of the internal heating device and the outer barrel of the internal heating device; the internal heating device circulating oil inlet passes through the first lower flange, the inner barrel base, the outer barrel base and the top of the inner barrel of the internal heating device in sequence, and is connected to the internal heating device spiral oil channel, and the internal heating device circulating oil outlet passes through the inner barrel base.

[0011] Furthermore, the stirring device includes a circular stirring barrel, a stirring column, a stirring shaft, a positioning flange, a positioning sleeve, a bearing, an outer retaining ring and an inner retaining ring; a plurality of the stirring columns are welded to the outer wall of the circular stirring barrel, the top of the circular stirring barrel is rigidly connected to the stirring shaft, a pair of the bearings are installed on the stirring shaft, the bearings are limited by a positioning sleeve, a positioning flange is installed on the outside of the bearing, the outer retaining ring and the inner retaining ring are arranged between the positioning flange and the bearing located at the top, and the feed port is arranged on the positioning flange.

[0012] Furthermore, the built-in positioning system includes a connecting rod, two baffles, a core shaft and two top sleeves; the connecting rod is inserted into the core shaft, a first bolt is welded to each end of the connecting rod, a baffle is provided at each end of the core shaft, and the top sleeves are also provided at each end of the core shaft on which the baffles are installed.

[0013] Furthermore, the insulation system includes an insulation cylinder, a stuffing cover and a gland, wherein the insulation cylinder, the stuffing cover and the gland together with the outer wall of the stator form an insulation circulation chamber, and the interior of the insulation circulation chamber is filled with circulating oil;

[0014] A circulating oil inlet and a circulating oil outlet are respectively provided at the upper and lower ends of the heat preservation cylinder;

[0015] The heat preservation cylinder includes a cylinder body, and a second lower flange and a second upper flange provided at both ends of the cylinder body; the motor stator is provided inside the heat preservation cylinder;

[0016] The packing cover is filled with sealing material, the sealing material is pre-tightened by the pressure cover and the pressure cover and the packing cover are connected by a third bolt and a third nut, and the insulation cylinder and the packing cover are connected by a second bolt and a second nut.

[0017] Furthermore, the sealing system includes a sealing sleeve, a protective sleeve, a support sleeve, a sealing flange sleeve, a sealing plate and a bolt joint;

[0018] The sealing sleeve is tightly connected to the top sleeve of the built-in positioning system, and the sealing sleeve and the stop surface of the stator inner wall are sealed by a sealing ring;

[0019] The protective sleeve and the supporting sleeve are arranged on the outside of the sealing sleeve, the protective sleeve is provided with a sealing member, and the protective sleeve is connected to the sealing flange sleeve, and the sealing flange sleeve is connected to the second lower flange and the second upper flange of the insulation system through the bolt joint;

[0020] The sealing plate is mounted on the sealing flange sleeve, a thermocouple is passed through the sealing plate, and a thermocouple sealing mechanism is provided between the thermocouple and the sealing plate.

[0021] Furthermore, the sealing sleeve is provided with a lead-out port for the stator winding lead-out wire and a temperature measuring hole, and a lead-out wire sealing mechanism is provided between the sealing sleeve and the lead-out port.

[0022] Furthermore, the sealing sleeve and the protective sleeve are both made of polytetrafluoroethylene material.

[0023] The present invention has the following advantages due to the adoption of the above technical solution:

[0024] 1. The present invention ensures that the ultra-high temperature insulation powder can be fully melted through the two sets of internal and external heating oil circulation systems of the ultra-high temperature insulation powder melting device; the stator winding is solidified and sealed by the stator winding insulation curing device to achieve insulation molding.

[0025] 2. The device of the present invention has a simple structure and excellent sealing effect, which fully replaces the vacuum pressure immersion paint method used in the traditional insulation treatment of the stator winding of the submersible motor. In addition, the process is simple and fast, and can realize the one-piece molding of the insulation structure of the stator winding of the ultra-high temperature submersible motor, thereby greatly improving the mechanical properties and chemical stability of the stator winding insulation, and ensuring the stability of the operation of the ultra-high temperature submersible electric pump unit under the integrated injection and production technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the structure of the ultra-high temperature submersible motor stator insulation molding device according to an embodiment of the present invention;

[0027] Figure 2 2 is a schematic structural diagram of an ultra-high temperature insulating powder melting device according to an embodiment of the present invention;

[0028] Figure 3 Schematic diagram of the structure of the stator winding insulation curing device in an embodiment of the present invention;

[0029] Figure 4 2 is a schematic structural diagram of an external heating device of an ultra-high temperature insulating powder melting device according to an embodiment of the present invention;

[0030] Figure 5 2. It is a schematic structural diagram of an internal heating device of an ultra-high temperature insulating powder melting device according to an embodiment of the present invention;

[0031] Figure 6 2 is a schematic structural diagram of a stirring device of an ultra-high temperature insulating powder melting device according to an embodiment of the present invention;

[0032] Figure 7 1 is a schematic structural diagram of a built-in positioning system of a stator winding insulation curing device according to an embodiment of the present invention;

[0033] Figure 8 Schematic diagram of the structure of the thermal insulation system of the stator winding insulation curing device according to an embodiment of the present invention;

[0034] Figure 9 1 is a structural schematic diagram of a sealing system of a stator winding insulation curing device according to an embodiment of the present invention;

[0035] Reference numerals:

[0036] 1-Ultra-high temperature insulation powder melting device; 2-Stator winding insulation curing device; 3-Feed port; 4-Liquid outlet; 5-External heating device; 6-Internal heating device; 7-Stirring device; 8-Accommodating chamber; 9-Circulating oil inlet of external heating device; 10-Circulating oil outlet of external heating device; 11-Circulating oil inlet of internal heating device; 12-Circulating oil outlet of internal heating device; 13-Spiral oil passage of external heating device; 14-Spiral oil passage of internal heating device; 15-Inner barrel of external heating device; 16-Outer barrel of external heating device; 17-First lower flange; 18-First upper flange; 19-Inner barrel of internal heating device; 20-Outer barrel of internal heating device; 21-Inner barrel base; 22-Outer barrel base; 23-Circular stirring barrel; 24-Stirring column; 25-Stirring shaft; 26-Positioning flange; 27-Positioning sleeve; 28-Bearing; 29-Outer retaining ring; 30-Inner retaining ring; 31-Built-in positioning system; 32-Insulation System; 33-Sealing system; 34-Temperature control system; 35-Liquid inlet; 36-Sampling port; 37-Connecting rod; 38-Baffle; 39-Core shaft; 40-Top sleeve; 41-First bolt; 42-First nut; 43-Insulation cylinder; 44-Stuffing cap; 45-Gland; 46-Insulation circulation chamber; 47-Circulating oil inlet; 48-Circulating oil outlet; 49-Cylinder; 50-Second lower flange; 51-Second upper flange; 52-Seal Materials; 53-second bolt; 54-second nut; 55-third bolt; 56-third nut; 57-sealing sleeve; 58-protective sleeve; 59-support sleeve; 60-sealing flange sleeve; 61-sealing plate; 62-bolt joint; 63-lead-out port; 64-lead-out wire sealing mechanism; 65-temperature measuring hole; 66-seal; 67-thermocouple; 68-thermocouple sealing mechanism; 69-circulating oil heating circulation system; 70-control cabinet. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] The present invention relates to an ultra-high-temperature submersible motor stator insulation molding device. The device is used to liquefy an encapsulated ultra-high-temperature insulation powder, then encapsulate it within the stator winding of the ultra-high-temperature submersible motor and solidify it, forming the basic insulation structure of the stator winding. The present invention comprises an ultra-high-temperature insulation powder melting device and a stator winding insulation solidification device. The ultra-high-temperature insulation powder melting device comprises an external heating device, an internal heating device, and a stirring device. The internal heating device is positioned within the external heating device, forming a powder holding chamber, and the stirring device is positioned within the chamber. The external heating device has an inlet and outlet for circulating oil on its exterior, and the internal heating device has an inlet and outlet for circulating oil on its bottom. Both the internal and external heating devices contain spiral oil channels, through which heated oil circulates, heating the powder within. The heated powder then becomes liquid and flows out through the outlet. The stator winding insulation solidification device comprises an internal positioning system, a thermal insulation system, a sealing system, and a temperature control system. The internal positioning system, positioned within the stator cavity, fills and seals the internal cavity and supports the stator winding to prevent thermal deformation. The insulation system primarily consists of an insulation cylinder, a stuffing cover, and a gland, forming an insulation circulation chamber filled with circulating oil. Sealing systems are located at both ends of this mechanism, primarily sealing the stator cavity, limiting the position of the potting colloid, and connecting it to the insulation system. The stator windings are formed using a temperature control system.

[0040] To improve the insulation performance of the motor at ultra-high temperatures, the present invention requires insulating and potting the motor stator windings. The ultra-high temperature insulation powder must first be melted into a liquid before potting. After potting, the stator winding insulation curing device is used to cure and seal the stator windings. After forming, the potted stator is sent to a high-temperature kiln for secondary curing.

[0041] In one embodiment of the present invention, a device for forming the stator insulation of an ultra-high temperature submersible motor is provided. Figures 1 to 9 As shown, the device includes: an ultra-high temperature insulation powder melting device 1 and a stator winding insulation curing device 2; the ultra-high temperature insulation powder melting device 1 is provided with a feed port 3 at the top and a liquid outlet 4 at the bottom; the ultra-high temperature insulation powder enters the ultra-high temperature insulation powder melting device 1 through the feed port 3, and the melted glue flows out of the liquid outlet 4 and enters the stator winding insulation curing device 2 to achieve stator winding insulation molding.

[0042] like Figure 2 As shown, the ultra-high temperature insulation powder melting device 1 includes an external heating device 5, an internal heating device 6, and a stirring device 7. The internal heating device 6 is arranged inside the external heating device 5, and a receiving chamber 8 for ultra-high temperature insulation powder is formed between the internal heating device 6 and the stirring device 7 is arranged in the receiving chamber 8.

[0043] like Figure 3 As shown, the stator winding insulation curing device 2 includes a built-in positioning system 31, a thermal insulation system 32, a sealing system 33, and a temperature control system 34. The built-in positioning system 31 is installed within the stator cavity of the ultra-high-temperature submersible motor, filling and sealing the stator cavity and supporting the stator winding. The thermal insulation system 32 is installed around the outer periphery of the stator housing. The sealing system 33 is located at each end of the stator cavity, with a liquid inlet 35 and a sampling port 36 for the flow of melted ultra-high-temperature insulation powder. The sealing flange sleeve 60 of the sealing system 33 is connected to the flange connection mechanism of the thermal insulation system 32 via a bolted joint 62 to seal the stator cavity and limit the position of the encapsulated colloid. The temperature control system 34 is connected to each end of the stator cavity to monitor and control the temperature within the stator cavity in real time, achieving insulation molding of the stator winding and ensuring that the stator winding insulation is ready for secondary curing in a high-temperature kiln.

[0044] The flange connection mechanism includes an upper flange, a lower flange, a sealing sleeve and bolts and nuts.

[0045] In this embodiment, the temperature control system 34 includes a thermocouple 67, a circulating oil heating circulation system 69, and a control cabinet 70. The circulating oil heating circulation system 69 is connected to the ultra-high temperature insulation powder melting device 1 and is used to transmit circulating oil. The thermocouple 67 is set in the sealing system 33 of the stator winding insulation curing device 2 and transmits the collected temperature information to the control cabinet 70. By controlling the circulating oil heating circulation system 69 to control the temperature, the ultra-high temperature insulation powder is melted in the ultra-high temperature insulation powder melting device 1. After the ultra-high temperature insulation powder is melted and fully exhausted, the valve controls the switch and flow rate to make the liquid flow out of the liquid outlet 4. After the glue is injected into the stator cavity of the stator winding insulation curing device 2 and fully exhausted, the temperature of the circulating oil is controlled to the curing temperature to achieve the insulation molding of the stator winding, and the conditions for the entire stator winding to enter the high-temperature kiln for secondary curing are met.

[0046] Optionally, the sampling port 36 has multiple functions such as exhaust, sampling and observation.

[0047] Optionally, the circulating oil is high-temperature heat transfer oil.

[0048] In one possible implementation, Figure 4As shown, the external heating device 5 comprises a first lower flange 17, a first upper flange 18, an inner barrel 15, and an outer barrel 16. The inner barrel 15 and the outer barrel 16 are welded together, from the inside out, between the first lower flange 17 and the first upper flange 18. A spiral oil passage 13 is provided between the inner barrel 15 and the outer barrel 16. An external heating device circulating oil inlet 9 and an external heating device circulating oil outlet 10 are provided at the bottom and top of the outer barrel 16, respectively, communicating with the spiral oil passage 13. The inlet 9 is located at the bottom, while the outlet 10 is near the top. The liquid outlet 4 is located near the bottom and passes through the outer barrel 16, 15, forming a sealed connection with the inner barrel 15 and the outer barrel 16.

[0049] Optionally, sealing must be ensured at the welding points between the first lower flange 17 , the first upper flange 18 and the inner barrel 15 and the outer barrel 16 of the external heating device.

[0050] In one possible implementation, Figure 5 As shown, the internal heating device 6 includes an inner barrel 19, an outer barrel 20, an inner barrel base 21, and an outer barrel base 22. The inner barrel 19 is welded to the inner barrel base 21, while the outer barrel 20 is welded to the outer barrel base 22. The inner and outer barrel bases 21 and 22 are welded together via a stopper, and the bottom of the inner barrel base 21 is welded to the first lower flange 17 of the external heating device 5. A spiral oil passage 14 is provided between the inner barrel 19 and the outer barrel 20. The internal heating device's circulating oil inlet 11 passes through the first lower flange 17, the inner barrel base 21, the outer barrel base 22, and the top of the inner barrel 19, connecting to the spiral oil passage 14. The internal heating device's circulating oil outlet 12 extends through the inner barrel base 21, and the internal heating device's circulating oil inlet 11 and outlet 12 are sealed and welded to the inner barrel base 21.

[0051] In one possible implementation, Figure 6 As shown, the stirring device 7 includes a circular stirring barrel 23, stirring rods 24, stirring shaft 25, positioning flange 26, positioning sleeve 27, bearing 28, outer retaining ring 29, and inner retaining ring 30. Several stirring rods 24 are welded to the outer wall of the circular stirring barrel 23, and the diameter of the stirring rods 24 can be set as needed. The top of the circular stirring barrel 23 is rigidly connected to the stirring shaft 25, and a pair of bearings 28 are installed on the stirring shaft 25. The bearings are limited in position by a positioning sleeve 27. A positioning flange 26 is installed on the outside of the bearings 28. An outer retaining ring 29 and an inner retaining ring 30 are provided between the positioning flange 26 and the bearing 28 located above, and the outer retaining ring 29 and the inner retaining ring 30 are used to limit the position. The feed port 3 is provided on the positioning flange 26.

[0052] Optionally, the stirring columns 24 are distributed over the entire outer circumference of the stirring barrel 23 .

[0053] Optionally, the stirring device 7 is driven to rotate by rotating the stirring shaft 25, and the stirring shaft 25 can be driven by an electric motor or manually.

[0054] When in use, first connect the internal heating device 6 and the external heating device 5 to the circulating oil heating device to circulate the oil circuit. The circulating oil circulates along the spiral oil channel 13 of the external heating device and the spiral oil channel 14 of the internal heating device to heat the internal ultra-high temperature insulating powder. After reaching the design temperature, add the ultra-high temperature insulating powder from the feed port 3, drive the stirring shaft 25 to rotate the stirring device 7, so that the ultra-high temperature insulating powder is evenly heated, and after the ultra-high temperature insulating powder becomes liquid, it flows out from the liquid outlet 4, and the switch and flow rate can be controlled by the valve.

[0055] In one possible implementation, Figure 7 As shown, the built-in positioning system 31 includes a connecting rod 37, two baffles 38, a core shaft 39, and two top sleeves 40. The connecting rod 37 is inserted into the core shaft 39, and a first bolt 41 is welded to each end of the connecting rod 37. The connecting rod 37 is inserted into the core shaft 39. A baffle 38 is installed at each end of the core shaft 39. The baffles 38 are used to adjust the axial position of the connecting rod 37 and the core shaft 39, and the baffles 38 are tightened with first nuts 42. Top sleeves 40 are also installed at each end of the core shaft 39 with the baffles 38 installed. The installed built-in positioning system 31 is installed in the stator cavity of the ultra-high temperature submersible motor.

[0056] In one possible implementation, Figure 8 As shown, the insulation system 32 includes an insulation tube 43, a stuffing cover 44 and a pressure cover 45, and the insulation tube 43, the stuffing cover 44 and the pressure cover 45 together with the outer wall of the motor stator form an insulation circulation chamber 46, and the insulation circulation chamber 46 is filled with circulating oil. A circulating oil inlet 47 and a circulating oil outlet 48 are respectively provided at the upper and lower ends of the insulation tube 43. The insulation tube 43 includes a cylinder 49, and a second lower flange 50 and a second upper flange 51 provided at both ends of the cylinder 49; the motor stator is provided inside the insulation tube 43. The stuffing cover 44 is filled with sealing material 52, and the sealing material 52 is pre-tightened by the pressure cover 45 and the pressure cover 45 and the packing cover 44 are connected using a third bolt 55 and a third nut 56 to achieve the purpose of sealing. The insulation tube 43 and the stuffing cover 44 are connected by a second bolt 53 and a second nut 54.

[0057] Optionally, the sealing material 52 includes but is not limited to braided packing, rubber products, or graphite products.

[0058] In a feasible embodiment, the sealing system 33 should be assembled after the built-in positioning system 31, the heat preservation system 32 and the stator are assembled. Figure 9 As shown, the sealing system 33 includes a sealing sleeve 57, a protective sleeve 58, a support sleeve 59, a sealing flange sleeve 60, a sealing plate 61, and a bolt joint 62. The sealing sleeve 57 is tightly connected to the top sleeve 40 of the built-in positioning system 31, and the sealing sleeve 57 and the inner wall of the stator are sealed by a sealing ring. A protective sleeve 58 and a support sleeve 59 are provided outside the sealing sleeve 57. The protective sleeve 58 and support sleeve 59 protect the stator housing threads, and the support sleeve 59 prevents the protective sleeve 58 from deformation due to heat. A sealing member 66 is provided on the protective sleeve 58, which is connected to the sealing flange sleeve 60. The sealing flange sleeve 60 is connected to the second lower flange 50 and the second upper flange 51 of the insulation system 32 via a bolt joint 62 to achieve concentricity and tightening. The sealing plate 61 is installed on the sealing flange sleeve 60 . A thermocouple 67 is passed through the sealing plate 61 . A thermocouple sealing mechanism 68 is provided between the thermocouple 67 and the sealing plate 61 . The thermocouple 67 is inserted into the sealing plate 61 and is sealed by the thermocouple sealing mechanism 68 .

[0059] Optionally, the sealing sleeve 57 is further provided with a lead-out port 63 for the stator winding lead-out wire and a temperature measuring hole 65 , and a lead-out wire sealing mechanism 64 is provided between the sealing sleeve 57 and the lead-out port 63 for sealing.

[0060] Optionally, the sealing sleeve 57 and the protective sleeve 58 are both made of polytetrafluoroethylene material. By utilizing the higher thermal expansion coefficient of polytetrafluoroethylene material, they can fill and seal the inner cavity of the stator, limit the colloid and prevent leakage.

[0061] During installation and use, the sealing sleeve 57 should be installed first. The sealing sleeve 57 is tightly connected to the top sleeve 40 of the built-in positioning system 31, and is sealed with the stop surface of the inner wall of the stator through a sealing ring; the installation of the protective sleeve 58 and the support sleeve 59 serves the purpose of protecting the stator shell thread. At the same time, the application of the support sleeve 59 can prevent the protective sleeve 58 from being deformed by heat. A sealing member 66 is provided on the protective sleeve 58 and is connected to the sealing flange sleeve 60. The sealing flange sleeve 60 is connected to the second lower flange 50 and the second upper flange 51 of the insulation system 32 through a bolt joint 62 to achieve concentricity and tightening. Finally, the sealing plate 61 is installed on the sealing flange sleeve 60, the thermocouple 67 is inserted and the thermocouple sealing mechanism 68 is used for sealing.

[0062] In a feasible embodiment, the feed port 3, the liquid outlet 4, the external heating device circulating oil inlet 9, the external heating device circulating oil outlet 10, the internal heating device circulating oil inlet 11, the internal heating device circulating oil outlet 12, the liquid inlet 35, the sampling port 36, the circulating oil inlet 47 and the circulating oil outlet 48 are all equipped with valves to facilitate the control of the switch, flow direction and flow rate of the circulating oil or glue.

[0063] In a feasible embodiment, the lead wire sealing mechanism 64, the sealing member 66 and the thermocouple sealing mechanism 68, etc., use sealing members made of materials including but not limited to perfluoroelastomer, tetrafluoroethylene rubber or polytetrafluoroethylene half rings.

[0064] In a feasible implementation, to ensure constant temperature, the entire device should adopt insulation measures, such as wrapping the entire test device with insulation cotton.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An ultra-high temperature submersible motor stator insulation molding device, characterized in that: include: An ultra-high temperature insulation powder melting device (1) and a stator winding insulation curing device (2); the ultra-high temperature insulation powder melting device (1) is provided with a feed port (3) at the top and a liquid outlet (4) at the bottom; the ultra-high temperature insulation powder enters the ultra-high temperature insulation powder melting device (1) from the feed port (3), and the melted glue flows out from the liquid outlet (4) and enters the stator winding insulation curing device (2); The ultra-high temperature insulating powder melting device (1) comprises an external heating device (5), an internal heating device (6) and a stirring device (7); the internal heating device (6) is arranged inside the external heating device (5), and a receiving cavity (8) for the ultra-high temperature insulating powder is formed between the two, and the stirring device (7) is arranged in the receiving cavity (8); The stator winding insulation curing device (2) includes a built-in positioning system (31), a heat preservation system (32), a sealing system (33) and a temperature control system (34); the built-in positioning system (31) is arranged in the stator cavity of the ultra-high temperature submersible motor, and the heat preservation system (32) is arranged on the outer periphery of the stator shell; the sealing system (33) is arranged at both ends of the stator cavity, and the sealing systems (33) at both ends are respectively provided with a liquid inlet (35) and a sampling port (36) for the circulation of melted ultra-high temperature insulation powder, and the sealing flange sleeve (60) of the sealing system (33) is connected to the flange connection mechanism of the heat preservation system (32) through a bolt joint (62); the temperature control system (34) is connected to both ends of the stator cavity; The sealing system (33) includes a sealing sleeve (57), a protective sleeve (58), a support sleeve (59), a sealing flange sleeve (60), a sealing plate (61) and a bolt joint (62); The sealing sleeve (57) is tightly connected to the top sleeve (40) of the built-in positioning system (31), and the sealing sleeve (57) and the stop surface of the stator inner wall are sealed via a sealing ring; The protective sleeve (58) and the supporting sleeve (59) are provided on the outside of the sealing sleeve (57); a sealing member (66) is provided on the protective sleeve (58); and the protective sleeve (58) is connected to the sealing flange sleeve (60); and the sealing flange sleeve (60) is connected to the second lower flange (50) and the second upper flange (51) of the thermal insulation system (32) via the bolt joint (62); The sealing plate (61) is mounted on the sealing flange sleeve (60), a thermocouple (67) is passed through the sealing plate (61), and a thermocouple sealing mechanism (68) is provided between the thermocouple (67) and the sealing plate (61); The temperature control system (34) includes a thermocouple (67), a circulating oil heating circulation system (69) and a control cabinet (70); the circulating oil heating circulation system (69) is connected to the ultra-high temperature insulation powder melting device (1), and the thermocouple (67) is arranged in the sealing system (33) of the stator winding insulation curing device (2) to transmit the collected temperature information to the control cabinet (70). The control cabinet (70) controls the circulating oil heating circulation system (69) and the ultra-high temperature insulation powder melting device (1) according to the received temperature information.

2. The ultra-high temperature submersible motor stator insulation molding device according to claim 1, characterized in that: The external heating device (5) comprises a first lower flange (17), a first upper flange (18), an external heating device inner barrel (15) and an external heating device outer barrel (16); the external heating device inner barrel (15) and the external heating device outer barrel (16) are welded in sequence from the inside to the outside between the first lower flange (17) and the first upper flange (18), and an external heating device spiral oil passage (13) is provided between the external heating device inner barrel (15) and the external heating device outer barrel (16); an external heating device circulating oil inlet (9) and an external heating device circulating oil outlet (10) in communication with the external heating device spiral oil passage (13) are provided at the bottom and top of the external heating device outer barrel (16), respectively; the liquid outlet (4) passes through the external heating device outer barrel (16) and the external heating device inner barrel (15), and is sealedly connected to the external heating device inner barrel (15) and the external heating device outer barrel (16).

3. The ultra-high temperature submersible motor stator insulation molding device according to claim 1, characterized in that: The internal heating device (6) comprises an internal heating device inner barrel (19), an internal heating device outer barrel (20), an inner barrel base (21) and an outer barrel base (22); the internal heating device inner barrel (19) is welded to the inner barrel base (21), the internal heating device outer barrel (20) is welded to the outer barrel base (22), the inner barrel base (21) and the outer barrel base (22) are welded together through a stopper, and the bottom of the inner barrel base (21) is welded to the first end of the external heating device (5). On a lower flange (17); an internal heating device spiral oil passage (14) is provided between the internal heating device inner barrel (19) and the internal heating device outer barrel (20); an internal heating device circulating oil inlet (11) passes through the first lower flange (17), the inner barrel base (21), the outer barrel base (22) and the top of the internal heating device inner barrel (19) in sequence, and is communicated with the internal heating device spiral oil passage (14); and an internal heating device circulating oil outlet (12) passes through the inner barrel base (21).

4. The ultra-high temperature submersible motor stator insulation molding device according to claim 1, characterized in that: The stirring device (7) comprises a circular stirring barrel (23), a stirring column (24), a stirring shaft (25), a positioning flange (26), a positioning sleeve (27), a bearing (28), an outer retaining ring (29) and an inner retaining ring (30); a plurality of the stirring columns (24) are welded to the outer wall of the circular stirring barrel (23); the top of the circular stirring barrel (23) is rigidly connected to the stirring shaft (25); a pair of the bearings (28) are installed on the stirring shaft (25); the bearings are limited by a positioning sleeve (27); a positioning flange (26) is installed on the outside of the bearing (28); the outer retaining ring (29) and the inner retaining ring (30) are arranged between the positioning flange (26) and the bearing (28) located at the top; and the feed port (3) is arranged on the positioning flange (26).

5. The ultra-high temperature submersible motor stator insulation molding device according to claim 1, characterized in that: The built-in positioning system (31) includes a connecting rod (37), two baffles (38), a core shaft (39) and two top sleeves (40); the connecting rod (37) is inserted into the core shaft (39), a first bolt (41) is welded to each end of the connecting rod (37), a baffle (38) is provided at each end of the core shaft (39), and the top sleeves (40) are also provided at each end of the core shaft (39) on which the baffles (38) are installed.

6. The ultra-high temperature submersible motor stator insulation molding device according to claim 1, characterized in that: The heat preservation system (32) includes a heat preservation tube (43), a stuffing cover (44) and a pressure cover (45), wherein the heat preservation tube (43), the stuffing cover (44) and the pressure cover (45) together with the outer wall of the stator form a heat preservation circulation chamber (46), and the heat preservation circulation chamber (46) is filled with circulating oil; A circulating oil inlet (47) and a circulating oil outlet (48) of the heat preservation tube are respectively provided at the upper and lower ends of the heat preservation tube (43); The heat-insulating cylinder (43) comprises a cylinder (49), and a second lower flange (50) and a second upper flange (51) provided at both ends of the cylinder (49); the motor stator is provided inside the heat-insulating cylinder (43); The packing cover (44) is filled with a sealing material (52), the sealing material (52) is pre-tightened by the gland (45), and the gland (45) and the packing cover (44) are connected by a third bolt (55) and a third nut (56), and the heat-insulating cylinder (43) and the packing cover (44) are connected by a second bolt (53) and a second nut (54).

7. The ultra-high temperature submersible motor stator insulation molding device according to claim 1, characterized in that: The sealing sleeve (57) is provided with a lead-out port (63) for the stator winding lead-out wire and a temperature measuring hole (65), and a lead-out wire sealing mechanism (64) is provided between the sealing sleeve (57) and the lead-out port (63).

8. The ultra-high temperature submersible motor stator insulation molding device according to claim 1, characterized in that: The sealing sleeve (57) and the protective sleeve (58) are both made of polytetrafluoroethylene material.

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