High-conductivity oil-free submersible motor

Abstract

The application discloses a high-conduction type oil-free submersible motor and belongs to the oil-free submersible motor field. The oil-free submersible motor comprises a series right part and a series left part located at two ends of the oil-free submersible motor and used for series connection of the oil-free submersible motor. The series right part comprises a cable connecting seat, a motor shaft head one arranged in the cable connecting seat, a spline sleeve connected to the motor shaft head one, another motor shaft head two of another group of the oil-free submersible motor connected to the other end of the spline sleeve, a high-conduction assembly arranged between the series right part and the spline sleeve, and an oil path seal for the series right part when the high-conduction assembly is not matched with the motor shaft head two of another group of the oil-free submersible motor. The high-conduction assembly is matched with the motor shaft head two of another group of the oil-free submersible motor, and is used for forming a conduction oil path between the series right part and the series left part of the two groups of the oil-free submersible motor. The application provides the oil-free submersible motor which stores a large amount of oil in the connecting seat cavity and realizes the oil-free scheme under the high-conduction condition of the oil path, and solves the problem of high-quality operation after series connection.

Description

Technical Field

[0001] This invention belongs to the field of oil-free submersible motors, and in particular a high-conductivity oil-free submersible motor. Background Technology

[0002] With the development of industrialization, the demand for energy in various countries is increasing. Offshore oil extraction relies on submersible motors for power. To increase production, it is often necessary to connect more submersible motors in series to increase horsepower. The installation of multiple motors in series needs to be carried out on the offshore platform.

[0003] Connecting a standard submersible motor to a lower motor requires first removing the transport cap, connecting the spline sleeve in the lower motor to the spline shaft head, and then aligning the flange of the lower motor's connecting seat with the flange on the cable connector to complete the series connection. Because submersible motors use internal circulating oil for cooling and lubrication, in standard submersible motors, due to vertical or inclined installation, the motor interior is full of motor oil before the transport cap is opened, leading to oil leakage. Therefore, on-site oil replenishment is necessary after series installation. Given the limited operating space on the platform, oil replenishment is extremely difficult. The technical method to solve this on-site oiling problem is called "oil-free" installation.

[0004] Currently, the oil-free submersible motor adopts a transport cap structure that will not leak oil after opening, and adds a special connecting spline sleeve. After the upper and lower motor sections are connected in series, the originally fully sealed motor structure is transformed by the change in the position of the special connecting spline sleeve, which creates a channel for the motor oil in the sealed cavity of the upper motor to flow into the lower motor, thus ensuring the continuity of the overall oil circuit of the submersible motor.

[0005] In detail, the currently common design language for oil-free devices in the industry is to minimize the internal cavity of the original motor connector, reducing the original high-flow, high-conductivity oil circuit to a single annular oil slit formed only by the outer wall of the spline sleeve and the inner cavity of the cable connector. The opening and closing of the oil circuit is achieved by the movement of the spline sleeve. While this simple mechanism achieves the core idea of ​​oil-free operation, it also brings problems that submersible motors themselves cannot overcome: the low oil flow rate leads to increased lubrication difficulty and reduced cooling performance.

[0006] The oil circulation of a submersible motor is achieved by the motor rotor driving the moving block of the thrust bearing to rotate at high speed. This forces the motor oil in the air gap through the radial shaft hole at the upper end of the shaft and into the hollow cavity of the shaft. The oil then flows back into the air gap from the lower outlet. This forms a closed loop of oil circulation: air gap – upper radial shaft hole – lower outlet of shaft hole – air gap. This continuous circulation lubricates the various moving parts inside the motor and transfers the heat inside the motor to the casing through the upper and lower cable connectors and the stator core, and then dissipates it into the well fluid of the oil well, thus achieving the dual purpose of lubrication and cooling.

[0007] In terms of existing technology, the oil-free submersible motor has a very low oil level in the lower cable connector due to the reduced inner cavity of the cable connector. As a result, the reduced oil level increases the viscosity of the motor oil in the circulating oil circuit during the above-mentioned oil circuit circulation process, which leads to a decrease in the lubrication and cooling effect during motor operation.

[0008] To address the aforementioned issues, an internal oil passage can be added to the shaft hole to compensate for the impact of the oil-free structure on oil circulation. However, taking the 456 series submersible motor, which is the most widely used in the industry, as an example, the outer diameter of the shaft hole is 30mm, making the machining of an automatic oil passage connection device extremely difficult. When the upper and lower motor sections cannot run synchronously, the thin-walled shaft hole cannot withstand the damping torque formed between it and the spline sleeve, which can lead to shaft breakage and unit shutdown. This potential hazard can result in significant losses.

[0009] Therefore, there is an urgent need for an oil-free submersible motor that can achieve an oil-free solution under the conditions of large oil volume in the cavity and high oil circuit conductivity, so as to solve the problems of oil leakage and failure to operate at high quality after series connection of submersible motors. Summary of the Invention

[0010] Purpose of the invention: To provide a high-conductivity, oil-free submersible motor to solve the above-mentioned problems existing in the prior art.

[0011] Technical Solution: A high-conductivity, oil-free submersible motor includes a series right section and a series left section located at both ends of the submersible motor for connecting the two motors in series. The series right section includes a cable connector and a motor shaft head 1 disposed within the cable connector. A spline sleeve is connected to the motor shaft head 1, and the other end of the spline sleeve is connected to a motor shaft head 2 of another set of submersible motors. A high-conductivity component is provided between the series right section and the spline sleeve. When the high-conductivity component is not engaged with the motor shaft head 2 of the other set of submersible motors, it is used to seal the oil passage of the series right section. When the high-conductivity component is engaged with the motor shaft head 2 of the other set of submersible motors, it is used to form a conductive oil passage between the series right section and the series left section of the two sets of submersible motors.

[0012] The high-conductivity component is disposed in the conductive cavity at the end of the cable connector. The high-conductivity component includes a flow guide seat, a guide rail cylinder, a sliding member, a sliding spring, and a cable holder. The sliding member is slidably fitted on the guide rail cylinder. Cable holders and flow guide seats are respectively provided at both ends of the guide rail cylinder. A sliding spring is provided between the cable holder and the sliding member. The high-conductivity component also includes a screw. The screw passes through the flow guide seat, the guide rail cylinder, and the cable holder in sequence and is connected to the threaded hole of the cable connector. The sliding member is fitted on a spline sleeve. The flow guide seat communicates with the oil hole of the cable connector. An oil leakage port is provided on the flow guide seat. The sliding member is used to block or open the oil leakage port.

[0013] Furthermore, the flow guide seat includes a flow guide ring and flow guide tubes, with several flow guide tubes distributed in a circular pattern on the flow guide ring. The oil drain port is located on the flow guide tube on the side close to the flow guide ring. The flow guide tube is disposed in the oil hole of the connecting seat. The flow guide ring has a countersunk hole, through which the screw passes.

[0014] Furthermore, a gap sealing groove is provided on the side of the guide ring near the slider, and a sealing gasket is provided in the gap sealing groove for sealing the gap between the slider and the guide seat when the high conductivity component is in a non-conductive state.

[0015] Furthermore, the sliding component includes an oil-blocking slider, which has a guide hole, through which the guide rail cylinder passes, and an oil-blocking groove, which cooperates with the oil leakage port.

[0016] Furthermore, the cable holder includes a holder ring and a sealing cylinder, with several sealing cylinders evenly distributed in a circular shape on the holder ring, and the holder ring having a fixing hole and an oil passage clearance groove.

[0017] Furthermore, the oil baffle slider is provided with a sliding clearance groove, the sealing cylinder is disposed in the sliding clearance groove, the oil baffle slider is provided with a double groove sealing groove, and a sealing ring is provided in the double groove sealing groove for dynamic sealing between the oil baffle slider and the cable connector and the sealing cylinder.

[0018] Furthermore, the sliding component also includes a ball bearing, the oil-blocking slider has a spring cavity, the ball bearing is disposed in the spring cavity, the conducting chamber has a positioning groove, and the ball bearing cooperates with the positioning groove to position the oil-blocking slider.

[0019] Furthermore, the inner wall of the oil baffle slider is provided with a shaft hole groove, and a wear-reducing pad is provided in the shaft hole groove for dynamic sealing between the oil baffle slider and the spline sleeve.

[0020] Furthermore, the spline sleeve includes a large diameter end and a small diameter end, which are integrally formed. A stop is provided at the connection between the large diameter end and the small diameter end to cooperate with the shaft hole groove to fix the anti-friction pad. Both the large diameter end and the small diameter end are provided with radial shaft holes.

[0021] Furthermore, the cable connector is provided with an assembly through hole, and an assembly part is provided in the assembly through hole. The assembly part passes through the sealing cylinder, the sliding clearance groove on the oil baffle slider and the fixed clearance groove on the guide ring in sequence, and docks with the mating part in the left part of the series connection for docking between the right part of the series connection and the left part of the series connection.

[0022] Beneficial effects: In the initial state of the high-conductivity component, the sealing ring in the double-groove sealing groove forms a stable seal between the slider assembly and the cable holder and cable connector. The sealing ring in the gap sealing groove on the guide seat forms a stable seal between the slider assembly and the guide rail mounting post and between the slider assembly and the guide seat. Therefore, the cable connector cavity can accommodate a large amount of motor oil without leakage, which effectively solves the problem of insufficient circulating oil caused by using a small flow rate to solve the problem of insufficient oil volume, which leads to increased viscosity of motor oil and affects the internal lubrication and cooling of the motor.

[0023] In addition, after the two sets of submersible motors are connected in series, the ball bearings set in the slider assembly will be locked into the positioning groove of the cable connector. After the slider assembly is completed, it will no longer move axially with any external force. This ensures that the high-conductivity, oil-free submersible motor will not damage the original submersible motor's motion mechanism due to the addition of the structure. This ensures the effective strength of the transmission structure of the two sets of submersible motors, making it stable in use and preventing damage due to the two sets of motors not being able to operate synchronously.

[0024] Furthermore, in the initial position, the oil leak is covered by the oil baffle groove on the oil baffle slider. When the oil baffle slider moves, the oil leak will detach from the previous oil baffle groove, thus forming a conductive oil path and achieving high conductivity when the submersible motors are connected in series.

[0025] In summary, this invention provides an oil-free submersible motor that can achieve an oil-free solution under conditions of large oil volume in the cavity and high oil circuit conductivity, solving the problems of oil leakage during the series connection of submersible motors and high-quality operation after series connection. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention when connected in series.

[0027] Figure 2 In this invention Figure 1 A schematic diagram of the internal structure.

[0028] Figure 3 This is a schematic diagram of the right-hand structure in this invention.

[0029] Figure 4In this invention Figure 3 The right view.

[0030] Figure 5 This invention is in Figure 4 Sectional view at point AA.

[0031] Figure 6 This invention is in Figure 5 Enlarged view of point B in the middle.

[0032] Figure 7 This is a schematic diagram of the internal structure of the cable connector in this invention.

[0033] Figure 8 This is an assembly diagram of the spline sleeve and the high-conductivity component in this invention.

[0034] Figure 9 In this invention Figure 8 Exploded view.

[0035] Figure 10 This is a schematic diagram of the high-conductivity component in the present invention in its conduction state.

[0036] Figure 11 This is a schematic diagram of the non-conducting state of the high-conductivity component in this invention.

[0037] Figure 12 This is a schematic diagram of the sliding component in this invention.

[0038] Figure 13 This is a schematic diagram of the flow guide seat in this invention.

[0039] Figure 14 This is a schematic diagram of the cable holder structure of the present invention.

[0040] Figure 15 This is a schematic diagram of the spline sleeve in this invention.

[0041] The attached diagram is labeled as follows: 1. Right side of series connection; 2. Cable connector; 21. Conductive chamber; 22. Threaded hole; 23. Positioning groove; 24. Assembly through hole; 25. Connector oil hole; 3. Motor shaft end one; 4. Assembly part; 5. Spline sleeve; 51. Large diameter end; 52. Radial shaft hole; 53. Stop; 54. Small diameter end; 6. High conductivity assembly; 61. Flow guide seat; 611. Flow guide ring; 612. Fixed clearance groove; 613. Countersunk hole; 614. Gap sealing groove; 615. Flow guide pipe; 616. Oil leak port; 62. 63. Screw; 64. Guide rail cylinder; 65. Sliding component; 66. Oil baffle slider; 67. Ball bearing; 68. Shaft hole groove; 69. Sliding clearance groove; 60. Guide hole; 61. Double groove sealing groove; 62. Spring cavity; 63. Oil baffle groove; 64. Anti-friction pad; 65. Sliding spring; 66. Cable holder; 67. Holder ring; 68. Sealing cylinder; 69. Oil passage clearance groove hole; 60. Fixing hole; 10. Series left part; 11. Cable mating seat; 22. Mating component; 33. Motor shaft head; 44. Conducting oil passage. Detailed Implementation

[0042] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0043] like Figures 1-5As shown, a high-conductivity, oil-free submersible motor includes a series right part 1 and a series left part 7 located at both ends of the submersible motor for connecting the two motors in series. The series right part 1 includes a cable connector 2 and a motor shaft head 3 disposed within the cable connector 2. A spline sleeve 5 is connected to the motor shaft head 3, and the other end of the spline sleeve 5 is connected to a motor shaft head 10 of another set of submersible motors. A high-conductivity component 6 is provided between the series right part 1 and the spline sleeve 5. When the high-conductivity component 6 is not engaged with the motor shaft head 10 of the other set of submersible motors, it is used to seal the oil passage of the series right part 1 on its own submersible motor. When the high-conductivity component 6 is engaged with the motor shaft head 10 of the other set of submersible motors, it is used to form a conductive oil passage 11 between the series right part 1 and the series left part 7 of the two sets of submersible motors. The working state (conducting and non-conducting) of the high-conductivity component 6 is determined by the motor shaft head 10 of another set of submersible motors. That is to say, when the submersible motors do not need to be connected in series, the high-conductivity component 6 is not affected by external forces and can initially ensure the self-sealing of the right side 1 of the series connection of the submersible motor. When the submersible motors need to be connected in series, it is only necessary to insert the motor shaft head 10 in the left side 7 of the series connection of one set of submersible motors into the spline sleeve 5 and push it axially a certain distance to make the spline sleeve 5 move axially. After the high-conductivity component 6 is squeezed, the internal structure changes, forming a passage structure for the smooth flow of power supply oil on the two sets of submersible motors. This avoids the problem of motor oil leakage when multiple sets of submersible motors are connected in series, and there is no need to add oil to the motor on the platform.

[0044] like Figures 7-11 As shown, the high conductivity component 6 is disposed in the conductivity chamber 21 at the end of the cable connector 2. The high conductivity component 6 includes a flow guide seat 61, a guide rail cylinder 63, a slider 64, a sliding spring 66, and a cable holder 67. The slider 64 is slidably fitted on the guide rail cylinder 63. The cable holder 67 and the flow guide seat 61 are respectively provided at both ends of the guide rail cylinder 63. A sliding spring 66 is provided between the cable holder 67 and the slider 64. The high conductivity component 6 also includes a screw 62. The screw 62 passes through the flow guide seat 61, the guide rail cylinder 63, and the cable holder 67 in sequence and is connected to the threaded hole 22 of the cable connector 2. The slider 64 is fitted on the spline sleeve 5. The flow guide seat 61 communicates with the oil hole 25 of the cable connector 2. An oil drain port 616 is provided on the flow guide seat 61. The slider 64 is used to block or open the oil drain port 616. Screw 62 installs the high-conductivity component 6 onto the cable connector 2. Under the action of the elastic force of the sliding spring 66, the sliding member 64 abuts against the guide seat 61 when the high-conductivity component 6 is not subjected to external force. At this time, the oil drain port 616 is blocked by the sliding member 64, and the motor oil in the oil hole 25 of the connector cannot flow out from the oil drain port 616.

[0045] like Figures 7-9 and Figure 13As shown in the figure, the flow guide seat 61 includes a flow guide ring 611 and a flow guide tube 615. Several flow guide tubes 615 are distributed in a circular pattern on the flow guide ring 611. An oil drain port 616 is opened on the flow guide tube 615 near the flow guide ring 611. The flow guide tube 615 is set in the oil hole 25 of the connecting seat. A countersunk hole 613 is opened on the flow guide ring 611. The screw 62 passes through the countersunk hole 613. The end of the screw 62 has no protrusion on the flow guide ring 611, so that the structure of the high conductivity component 6 is flat. A gap sealing groove 614 is opened on the side of the flow guide ring 611 near the sliding member 64. A sealing gasket is provided in the gap sealing groove 614 for sealing the gap between the sliding member 64 and the flow guide seat 61 when the high conductivity component 6 is not in the conducting state, ensuring that the high conductivity component 6 itself is well sealed when it is not in the conducting state.

[0046] like Figures 7-9 and Figure 12 As shown in the figure, the sliding member 64 includes an oil-blocking slider 641, on which a guide hole 645 is provided. A guide rail cylinder 63 passes through the guide hole 645, allowing the oil-blocking slider 641 to slide on the guide rail cylinder 63. An oil-blocking groove 648 is provided on the oil-blocking slider 641, which cooperates with the oil drain port 616. That is, the relative position of the oil-blocking slider 641 and the oil drain port 616 determines the working state of the high-conductivity component 6.

[0047] like Figures 12-14 As shown, the cable retainer 67 includes a retainer ring 671 and a sealing cylinder 672. Several sealing cylinders 672 are evenly distributed in a circle on the retainer ring 671. The retainer ring 671 has a fixing hole 674 and an oil passage clearance groove hole 673. The oil baffle slider 641 has a sliding clearance groove 644, and the sealing cylinder 672 is disposed in the sliding clearance groove 644. The oil baffle slider 641 has a double groove sealing groove 646, and a sealing ring is provided in the double groove sealing groove 646 for dynamic sealing between the oil baffle slider 641 and the cable connector 2 and the sealing cylinder 672.

[0048] like Figures 5-7 and Figure 12 As shown, the sliding member 64 also includes a ball 642. The oil-blocking slider 641 has a spring cavity 647, and the ball 642 is disposed in the spring cavity 647. The conductive chamber 21 has a positioning groove 23. The ball 642 cooperates with the positioning groove 23 to position the oil-blocking slider 641, thereby locking the working state of the high-conductivity component 6. The position of the positioning groove 23 is designed according to the axial movement distance of the motor shaft head 2 10, thereby realizing the stroke limit of the motor shaft head 2 10.

[0049] like Figure 6 , Figure 9 , Figure 12 , Figure 14As shown in Figure 15, the inner wall of the oil baffle slider 641 is provided with a shaft hole groove 643, and a wear-reducing pad 65 is provided in the shaft hole groove 643 for dynamic sealing between the oil baffle slider 641 and the spline sleeve 5. Preferably, the wear-reducing pad 65 is made of wear-resistant and high-temperature resistant PEEK material to meet the dynamic sealing requirements. The spline sleeve 5 includes a large diameter end 51 and a small diameter end 54, which are integrally formed. A stop 53 is provided at the connection between the large diameter end 51 and the small diameter end 54 to fix the anti-friction pad 65 in the shaft hole groove 643. The oil baffle slider 641 is fitted on the small diameter end 54 and the small diameter end 54 is connected to the shoulder of the oil baffle slider 641. When the spline sleeve 5 is compressed, the oil baffle slider 641 will move with the spline sleeve 5, thereby completing the switching of the working state of the high conductivity component 6. The large diameter end 51 and the small diameter end 54 are filled with expansion bolts to seal and separate the spline sleeve 5 from the submersible motors connected on both sides. Both the large diameter end 51 and the small diameter end 54 are provided with radial shaft holes 52. The motor oil flowing in from the radial shaft holes 52 is guided into the motor shaft head 2 10 or the motor shaft head 1 3 to cool these positions.

[0050] like Figure 1 , Figure 2 , Figure 12 , Figure 13 and Figure 14 As shown, the cable connector 2 has an assembly through hole 24, and an assembly part 4 is provided in the assembly through hole 24. The assembly part 4 passes through the sealing cylinder 672, the sliding clearance groove 644 opened on the oil baffle slider 641 and the fixed clearance groove 612 on the guide ring 611 in sequence, and docks with the mating part 9 in the left part 7 of the series connection, for docking of the right part 1 of the series connection and the left part 7 of the series connection. The sliding part 64, the guide seat 61 and the cable holder 67 have a compact structure to make room for the assembly part 4 and reduce the size of the submersible motor.

[0051] This invention operates in two modes: series and non-series.

[0052] Non-series operation means that the rightmost part 1 of a set of submersible motors is not connected in series with the next set of submersible motors, that is... Figure 3 In the state shown, the high-conductivity component 6 is in a non-conducting state in this mode. Because the large-diameter end 51 of the spline sleeve 5 is no longer connected to the motor shaft head 10, the spline sleeve 5 is no longer under force. Under the action of the sliding spring 66, the sliding member 64 abuts against the guide seat 61. Because the gap sealing groove 614 is filled with a sealing ring, the sealing here is guaranteed. After the motor oil flows from the oil hole 25 of the connecting seat to the guide tube 615 of the guide seat 61, the oil leakage port 616 is blocked by the oil blocking slider 641, and the motor oil cannot leak out. When the submersible motor is working, the motor shaft head 3 rotates with the spline sleeve 5. The spline sleeve 5 and the oil blocking slider 641 generate dynamic friction at the anti-friction pad 65. In order to extend the service life of the anti-friction pad 65, the spline sleeve 5 can be disassembled in the non-series operation mode.

[0053] The series operation mode refers to connecting the right-hand side 1 of one set of submersible motors to the right-hand side 1 of another set of submersible motors, that is... Figure 1 In the state shown, the high-conductivity component 6 is in the conducting state in this mode. Specifically, when the motor shaft head 2 10 of the right part 1 of another set of submersible motors is inserted into the large diameter end 51 of the spline sleeve 5 and pushed a certain distance axially, the motor shaft head 2 10 squeezes the spline sleeve 5 closer to the motor shaft head 1 3. During this process, the small diameter end 54 of the spline sleeve 5 squeezes the oil-blocking slider 641. The oil-blocking slider 641 moves along the guide cylinder 63 closer to the cable holder 67, and the sliding spring 66 contracts. Because the double groove sealing groove 646 is equipped with a sealing ring, the oil-blocking slider 641 maintains a good seal with the cable holder 67 and the cable connector 2 during the movement until the spring cavity 647 matches the position of the positioning groove 23, and the ball 642... The slide 64 is positioned by inserting into the spring cavity 647, which also indicates that the movement stroke of the motor shaft head 10 is complete. At this time, the oil groove 648 has moved away from the oil drain port 616, and the motor oil enters the left part 7 of the next submersible motor series along the oil passage 11 (connecting seat oil hole 25-guide pipe 615-oil drain port 616-conducting chamber 21-gap between spline sleeve 5 and guide ring 611). The large oil flow of the oil passage 11 is beneficial to the circulation of motor oil in the series unit. In the above series engineering, the assembly 4 and mating parts 9 have also been connected. Finally, the series operation can be completed by connecting the cable connector 2 and the cable mating seat 8 with fasteners. The whole operation process is simple and convenient.

[0054] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. A high-conductivity, oil-free submersible motor, comprising a series right part (1) and a series left part (7) located at both ends of the submersible motor for connecting the submersible motor in series, wherein the series right part (1) includes a cable connector (2) and a motor shaft head (3) disposed within the cable connector (2), characterized in that: A spline sleeve (5) is connected to the motor shaft head one (3). The other end of the spline sleeve (5) is connected to the motor shaft head two (10) of another set of submersible motors. A high conductivity component (6) is provided between the series right part (1) and the spline sleeve (5). When the high conductivity component (6) is not engaged with the motor shaft head two (10) of another set of submersible motors, it is used to seal the oil passage of the series right part (1). When the high conductivity component (6) is engaged with the motor shaft head two (10) of another set of submersible motors, it is used to form a conductive oil passage (11) between the series right part (1) and the series left part (7) of the two sets of submersible motors. The high-conductivity component (6) is disposed in the conductive chamber (21) at the end of the cable connector (2). The high-conductivity component (6) includes a flow guide (61), a guide cylinder (63), a sliding member (64), a sliding spring (66), and a cable holder (67). The sliding member (64) is slidably fitted on the guide cylinder (63). The cable holder (67) and the flow guide (61) are respectively provided at both ends of the guide cylinder (63). The sliding spring (66) is provided between the cable holder (67) and the sliding member (64). The high conductivity component (6) also includes a screw (62), which passes through the guide seat (61), the guide tube (63) and the cable holder (67) in sequence, and is connected to the threaded hole (22) of the cable connector (2). The sliding member (64) is fitted on the spline sleeve (5). The guide seat (61) is connected to the oil hole (25) of the cable connector (2). The guide seat (61) is provided with an oil leakage port (616). The sliding member (64) is used to block or open the oil leakage port (616).

2. The high-conductivity, oil-free submersible motor according to claim 1, characterized in that: The flow guide seat (61) includes a flow guide ring (611) and a flow guide tube (615). Several flow guide tubes (615) are distributed in a circular pattern on the flow guide ring (611). The oil drain port (616) is opened on the flow guide tube (615) on the side close to the flow guide ring (611). The flow guide tube (615) is set in the oil hole (25) of the connecting seat. The flow guide ring (611) is provided with a countersunk hole (613). The screw (62) passes through the countersunk hole (613).

3. The high-conductivity, oil-free submersible motor according to claim 2, characterized in that: The guide ring (611) has a gap sealing groove (614) on the side near the slider (64), and a sealing gasket is provided in the gap sealing groove (614) for sealing the gap between the slider (64) and the guide seat (61) when the high conductivity component (6) is in a non-conductive state.

4. A high-conductivity, oil-free submersible motor according to claim 3, characterized in that: The sliding member (64) includes an oil-blocking slider (641), on which a guide hole (645) is provided, and the guide rail cylinder (63) passes through the guide hole (645). An oil-blocking groove (648) is provided on the oil-blocking slider (641), and the oil-blocking groove (648) cooperates with the oil drain (616).

5. A high-conductivity, oil-free submersible motor according to claim 4, characterized in that: The cable holder (67) includes a holder ring (671) and a sealing cylinder (672). Several sealing cylinders (672) are evenly distributed in a circle on the holder ring (671). The holder ring (671) is provided with a fixing hole (674) and an oil passage clearance groove (673).

6. A high-conductivity, oil-free submersible motor according to claim 5, characterized in that: The oil-blocking slider (641) is provided with a sliding clearance groove (644), and the sealing cylinder (672) is disposed in the sliding clearance groove (644). The oil-blocking slider (641) is provided with a double groove sealing groove (646), and a sealing ring is provided in the double groove sealing groove (646) for dynamic sealing between the oil-blocking slider (641) and the cable connector (2) and the sealing cylinder (672).

7. A high-conductivity, oil-free submersible motor according to claim 6, characterized in that: The sliding member (64) also includes a ball (642). The oil-blocking slider (641) has a spring cavity (647), and the ball (642) is disposed in the spring cavity (647). The conducting chamber (21) has a positioning groove (23). The ball (642) cooperates with the positioning groove (23) to position the oil-blocking slider (641).

8. A high-conductivity, oil-free submersible motor according to claim 7, characterized in that: The inner wall of the oil baffle slider (641) is provided with a shaft hole groove (643), and a wear-reducing pad (65) is provided in the shaft hole groove (643) for dynamic sealing between the oil baffle slider (641) and the spline sleeve (5).

9. A high-conductivity, oil-free submersible motor according to claim 8, characterized in that: The spline sleeve (5) includes a large diameter end (51) and a small diameter end (54), which are integrally formed. A stop (53) is provided at the connection between the large diameter end (51) and the small diameter end (54) to cooperate with the shaft hole groove (643) to fix the anti-friction pad (65). Both the large diameter end (51) and the small diameter end (54) are provided with radial shaft holes (52).

10. A high-conductivity, oil-free submersible motor according to any one of claims 1-9, characterized in that: The cable connector (2) is provided with an assembly through hole (24), and an assembly part (4) is provided in the assembly through hole (24). The assembly part (4) passes through the sealing cylinder (672), the sliding clearance groove (644) opened on the oil baffle slider (641), and the fixed clearance groove (612) on the guide ring (611) in sequence, and docks with the mating part (9) in the left part of the series connection (7) for docking of the right part of the series connection (1) and the left part of the series connection (7).

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