An electromagnetic speed regulator, permanent magnet speed regulator and operation system for stepless speed regulation

Abstract

The utility model provides a kind of electromagnetic speed regulator, permanent magnet speed regulator and operation system for stepless speed regulation, the electromagnetic speed regulator for stepless speed regulation adopts disc type or cylinder type structure, it includes oppositely arranged electromagnetic component and first magnetic conducting component, the electromagnetic component is connected with prime mover by input shaft, electromagnet is arranged in the electromagnetic component, the first magnetic conducting component is connected with operation unit by output shaft. The present embodiment has the advantages of fast response speed, low failure rate, maintenance-free, no contact wear and other advantages when speed regulation is carried out in fracturing, sand mixing and cementing equipment, and has the functions of fast start, stepless speed regulation, vibration isolation and other functions.

Description

Technical Field

[0001] This utility model relates to the technical field of well site operation systems, specifically to an electromagnetic speed regulator, a permanent magnet speed regulator, and an operation system for stepless speed regulation. Background Technology

[0002] Existing fracturing systems used in well sites, such as engine + gearbox + fracturing pump, inverter + motor + fracturing pump, integrated inverter + fracturing pump, turbine + reducer + fracturing pump, etc., often have the following problems: For example, when using a reciprocating piston engine + gearbox + fracturing pump, the flow rate of the fracturing pump is adjusted by switching between several fixed gears in the gearbox, but stepless speed regulation is not possible. Furthermore, during fracturing operations, gearbox shifting causes the power system to experience certain load impacts, affecting the lifespan of the gearbox shaft system. For gas engines, excessive load impacts may cause engine stalling. For example, when using an inverter + motor + fracturing pump (integrated inverter + fracturing pump), problems such as high failure rate, high maintenance cost, and susceptibility to harmonic interference arise. For example, when using a single-shaft gas turbine engine + gearbox + fracturing pump, the single-shaft turbine engine cannot achieve speed regulation, resulting in an inability to adjust the fracturing pump flow rate. In addition, the above methods use mechanical connections, and the vibration of the fracturing pump is transmitted to the power transmission system, affecting its lifespan. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide an electromagnetic speed regulator, a permanent magnet speed regulator and an operating system for stepless speed regulation, so as to solve the above-mentioned problems existing in the prior art.

[0004] To solve the above-mentioned technical problems, this utility model provides an electromagnetic speed regulator for stepless speed regulation, which adopts a disc or cylindrical structure and includes an electromagnetic component and a first magnetic conductive component arranged opposite to each other. The electromagnetic component is connected to the prime mover through an input shaft, and an electromagnet is installed inside the electromagnetic component. The first magnetic conductive component is connected to the working unit through an output shaft.

[0005] In some embodiments, the electromagnetic speed controller is a single-disc structure, which includes an electromagnet and a first guide disk arranged opposite to each other. A first electromagnet is disposed inside the electromagnet, the electromagnet is connected to a first input shaft, and the first guide disk is connected to a first output shaft.

[0006] In some embodiments, the first electromagnet is disposed through the magnetic disk, and there are multiple first electromagnets arranged circumferentially along the magnetic disk, with adjacent first electromagnets having opposite polarities at the ends facing the first magnetic disk.

[0007] In some embodiments, the first electromagnets are arranged in a flat manner on the surface of the electronic disk opposite to the first conductive disk. There are multiple first electromagnets arranged radially, and the polarities of the ends of adjacent first electromagnets facing the center of the electronic disk are opposite.

[0008] In some embodiments, the electromagnetic speed regulator is a single-cylinder structure, which includes an electromagnetic cylinder and a first magnetic cylinder arranged opposite to each other. A second electromagnet is disposed inside the electromagnetic cylinder. The first magnetic cylinder is wrapped by the electromagnetic cylinder. The electromagnetic cylinder is connected to a second input shaft, and the first magnetic cylinder is connected to a second output shaft.

[0009] In some embodiments, the electromagnetic cylinder has an annular first cylinder wall, the first magnetically conductive cylinder has an annular second cylinder wall, the second cylinder wall is disposed inside the first cylinder wall, the second electromagnet is located inside the first cylinder wall and extends along the thickness direction of the electromagnetic cylinder, and the opening direction of the first magnetically conductive cylinder is opposite to or the same as the opening direction of the electromagnetic cylinder.

[0010] In some embodiments, the electromagnetic speed regulator has a dual-cylinder structure, wherein the electromagnetic cylinder includes two annular first cylinder walls, and the second cylinder wall is inserted between the two first cylinder walls of the electromagnetic cylinder.

[0011] This utility model provides a permanent magnet speed regulator for stepless speed regulation, which adopts a disc or cylindrical structure and includes a permanent magnet component and a second magnetic guiding component arranged opposite to each other. The permanent magnet component is provided with a permanent magnet. The permanent magnet component is connected to the prime mover through an input shaft. The second magnetic guiding component is connected to the working unit through an output shaft. A speed regulating mechanism is provided on the input shaft and / or the output shaft.

[0012] In some embodiments, the permanent magnet speed controller is a single-disc structure, which includes a permanent magnet disk and a second guide disk arranged opposite to each other. A first permanent magnet is disposed in the permanent magnet disk. The permanent magnet disk is connected to a third input shaft. The second guide disk is connected to a third output shaft. A first speed regulating mechanism is disposed on the third input shaft and / or the third output shaft.

[0013] In some embodiments, a shielding plate is provided between the permanent disk and the second conductive disk.

[0014] In some embodiments, the permanent magnet speed controller has a dual-disc structure, including two permanent magnet disks and two second guide disks. The two permanent magnet disks are arranged opposite to each other, and the two second guide disks are respectively arranged outside each permanent magnet disk and corresponding to the permanent magnet disks. The distance between the two permanent magnet disks is adjusted by the first speed regulating mechanism.

[0015] In some embodiments, the permanent magnet speed regulator is a single-cylinder structure, which includes a permanent magnet cylinder and a second magnetic guide cylinder arranged opposite to each other. The second magnetic guide cylinder is wrapped by the permanent magnet cylinder. A second permanent magnet is disposed inside the permanent magnet cylinder. The permanent magnet cylinder is connected to a fourth input shaft. The second magnetic guide cylinder is connected to a fourth output shaft. A second speed regulating mechanism is disposed on the fourth input shaft and / or the fourth output shaft.

[0016] In some embodiments, a shielding cylinder is provided between the walls of the permanent magnet cylinder and the second magnetic cylinder.

[0017] This utility model provides a continuously variable speed control operating system, including a prime mover and an operating unit. An electromagnetic speed regulator or a permanent magnet speed regulator as described above is provided between the prime mover and the operating unit. The speed output by the prime mover is continuously variable through the electromagnetic speed regulator or the permanent magnet speed regulator and input to the operating unit.

[0018] The embodiments disclosed herein have advantages such as fast response speed, low failure rate, maintenance-free operation, and no contact wear when adjusting the speed of equipment such as fracturing, sand mixing, and cementing. They also have functions such as rapid start-up, stepless speed regulation, and vibration isolation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of the continuously variable speed operating system provided in this embodiment of the utility model;

[0021] Figure 2 A second schematic diagram of the structure of the continuously variable speed control operating system provided in this embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the structure of the disc-type electromagnetic speed controller provided in the embodiment of this utility model;

[0023] Figure 4 A schematic diagram of the electromagnet arrangement in a disc-type electromagnetic speed controller provided in this embodiment of the utility model;

[0024] Figure 5 One of the structural schematic diagrams of the single-cylinder electromagnetic speed controller provided in the embodiment of this utility model;

[0025] Figure 6A second schematic diagram of the structure of the single-cylinder electromagnetic speed controller provided in an embodiment of this utility model;

[0026] Figure 7 A schematic diagram of the structure of the dual-cylinder electromagnetic speed regulator provided in this embodiment of the utility model is shown in Figure 31.

[0027] Figure 8 A schematic diagram of the electromagnet arrangement in a double-cylinder electromagnetic speed controller provided in this embodiment of the utility model;

[0028] Figure 9 One of the structural schematic diagrams of the single-disc permanent magnet speed controller provided in the embodiment of this utility model;

[0029] Figure 10 A second schematic diagram of the structure of the single-disc permanent magnet speed controller provided in this embodiment of the utility model;

[0030] Figure 11 The third schematic diagram of the single-disc permanent magnet speed controller provided in the embodiment of this utility model;

[0031] Figure 12 One of the structural schematic diagrams of the dual-disc permanent magnet speed controller provided in this embodiment of the utility model;

[0032] Figure 13 A second schematic diagram of the structure of the dual-disc permanent magnet speed controller provided in this embodiment of the utility model;

[0033] Figure 14 One of the structural schematic diagrams of the single-tube permanent magnet speed controller provided in the embodiment of this utility model;

[0034] Figure 15 A second schematic diagram of the structure of the single-tube permanent magnet speed controller provided in an embodiment of this utility model;

[0035] Figure 16 One of the structural schematic diagrams of the dual-cylinder permanent magnet speed controller provided in the embodiment of this utility model;

[0036] Figure 17 A second schematic diagram of the structure of the dual-cylinder permanent magnet speed controller provided in this embodiment of the utility model;

[0037] Figure 18 One of the structural schematic diagrams of the single-tube permanent magnet speed controller provided in the embodiment of this utility model;

[0038] Figure 19 A second schematic diagram of the structure of the single-tube permanent magnet speed controller provided in an embodiment of this utility model;

[0039] Figure 20 One of the schematic diagrams of the loading form of the operating system provided in the embodiment of this utility model;

[0040] Figure 21 A second schematic diagram illustrating the loading configuration of the operating system provided in this embodiment of the utility model;

[0041] Figure 22 A third schematic diagram illustrating the loading configuration of the operating system provided in this embodiment of the utility model;

[0042] Figure 23 Fourth schematic diagram of the loading form of the operating system provided in the embodiment of this utility model;

[0043] Figure 24 One of the application scenarios of the operating system provided in this embodiment of the utility model;

[0044] Figure 25 A second schematic diagram illustrating the application scenario of the operating system provided in this embodiment of the utility model;

[0045] Figure 26 The third schematic diagram of the application scenario of the operating system provided in this embodiment of the utility model;

[0046] Figure 27 The fourth illustration shows the application scenario of the operating system provided in this embodiment of the utility model.

[0047] Figure label:

[0048] 1-Prime mover; 2-Fracturing pump; 3-Magnetic speed governor; 3a-First magnetic speed governor; 3b-Second magnetic speed governor; 4-First coupling; 5-Second coupling; 6-Controller; 7-Skirt; 8-Bottom skid; 9-Protective frame; 10a-Chassis vehicle; 10b-Semi-trailer; 11-Turbine; 12-Reduction gear; 13-Engine; 14-Transmission device; 15-Transmission device; 20-Auxiliary power unit; 21-Motor; 22-Gear set; 31-Disc electromagnetic speed governor; 311-Electromagnetic disk; 3111-First electromagnet; 312-Conducting disk; 313-First input shaft; 314-First output shaft; 315-First speed sensor; 32-Cylinder electromagnetic speed governor; 321-Electromagnetic cylinder; 3211-Second electromagnet; 321 2-First cylinder wall; 322-First magnetic guide cylinder; 3221-Second cylinder wall; 323-Second input shaft; 324-Second output shaft; 325-Second speed sensor; 33-Disc-type permanent magnet speed controller; 331-Permanent magnet disk; 3311-First permanent magnet; 332-Second magnetic guide cylinder; 333-Third input shaft; 334-Third output shaft; 335-Third speed sensor; 336-First speed regulating mechanism; 337-Shielding plate; 34-Cylinder-type permanent magnet speed controller; 341-Permanent magnet cylinder; 3411-Second permanent magnet; 3412-First cylinder wall; 342-Second magnetic guide cylinder; 3421-Second cylinder wall; 343-Fourth input shaft; 344-Fourth output shaft; 345-Fourth speed sensor; 346-Second speed regulating mechanism; 347-Shielding cylinder. Detailed Implementation

[0049] Various embodiments and features of this utility model are described herein with reference to the accompanying drawings.

[0050] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this invention will be apparent to those skilled in the art.

[0051] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0052] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0053] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the present invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0054] The above and other aspects, features and advantages of the present invention will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0055] Specific embodiments of the present invention will now be described with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of the present invention, which may be implemented in various ways. Well-known and / or repeated functions and structures have not been described in detail to avoid unnecessary or redundant details that could obscure the present invention. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of substantially any suitable detailed structures.

[0056] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to the present invention.

[0057] This utility model provides a continuously variable speed control operating system, including a prime mover and an operating unit, with a magnetic speed governor disposed between the prime mover and the operating unit. The operating system can be, for example, a fracturing operating system, a sand mixing operating system, or a cementing operating system, and the operating unit corresponds to the operating system, such as a fracturing pump. This embodiment uses a fracturing operating system as an example. Figure 1 As shown, it includes a prime mover 1 and a fracturing pump 2. A magnetic speed regulator 3 is provided between the prime mover 1 and the fracturing pump 2. The speed output of the prime mover 1 is steplessly regulated by the magnetic speed regulator 3 and input to the fracturing pump 3, so that the fracturing pump 2 can be driven based on different speeds.

[0058] The prime mover 1 is located on the power output side to output a first rotational speed, and the magnetic speed regulator 3 is used to adjust the first rotational speed to a second rotational speed. The fracturing pump 2 is located on the power input side to receive the second rotational speed. In this embodiment, the magnetic speed regulator 3, which is located between the prime mover 1 and the fracturing pump 2, has advantages such as fast response speed, low failure rate, maintenance-free operation, and no contact wear. For example, the magnetic speed regulator 3 can realize functions such as rapid start-up of the fracturing pump 2, stepless speed regulation during operation, and vibration isolation. In addition, in this embodiment, the magnetic speed regulator 3, besides realizing stepless speed regulation, also has a clutch function.

[0059] Furthermore, such as Figure 2 As shown, to achieve direct power transmission from the prime mover 1 to the fracturing pump 2, the prime mover 1 is connected to the magnetic speed controller 3 via a first coupling 4, and the magnetic speed controller 3 is connected to the fracturing pump 3 via a second coupling 5. These connections can be mechanical, hydraulic, magnetic, etc. The first coupling 4 and the second coupling 5 enable a straight-line power transmission from the prime mover 1 to the fracturing pump 2, avoiding power waste during transmission.

[0060] In this embodiment, the magnetic speed regulator 3 can be an electromagnetic speed regulator or a permanent magnet speed regulator. The difference between an electromagnetic speed regulator and a permanent magnet speed regulator is mainly based on whether an electromagnet or a permanent magnet is used in the magnetic speed regulator 3.

[0061] Specifically, the electromagnetic speed regulator includes an electromagnetic component and a first magnetically conductive component arranged opposite to each other. An electromagnet is disposed in the electromagnetic component, which is connected to the input shaft. The first magnetically conductive component is connected to the output shaft. The power from the prime mover 1 is transmitted to the input shaft of the electromagnetic speed regulator and output from the output shaft towards the fracturing pump 2. The permanent magnet speed regulator includes a permanent magnet component and a second magnetically conductive component arranged opposite to each other. A permanent magnet is disposed in the permanent magnet component, which is connected to the input shaft. The second magnetically conductive component is connected to the output shaft. The power from the prime mover 1 is transmitted to the input shaft of the permanent magnet speed regulator and output from the output shaft towards the fracturing pump 2. The aforementioned electromagnetic component or permanent magnet component serves as an electromagnetic rotor or a permanent magnet rotor. Windings are disposed on the electromagnetic rotor or permanent magnet rotor, and the first magnetically conductive component or the second magnetically conductive component serves as a conductor rotor.

[0062] In addition, to achieve speed regulation, the permanent magnet speed regulator also includes a speed regulating mechanism. The speed regulating mechanism includes at least a pull rod, a hydraulic cylinder, a gear rack, a crank slider, and a cam mechanism. The main function of the speed regulating mechanism is to drive the permanent magnet component closer to or further away from the second magnetic conductive component. That is, by changing the separation gap D between the permanent magnet component and the second magnetic conductive component (or shielding part of the magnetic field), the strength of the magnetic field between the permanent magnet component and the second magnetic conductive component is adjusted, thereby achieving the speed regulation function.

[0063] The magnetic speed regulator 3, as described above, receives power from the output of the prime mover 1 via its input shaft, driving the permanent magnet component to rotate. The second magnetically conductive component rotates along with the permanent magnet component due to its magnetic force. The output shaft of the second magnetically conductive component is connected to the input shaft of the fracturing pump 2, thus driving the crankshaft of the fracturing pump 2 to complete the reciprocating motion of the plunger. Here, the permanent magnet component and the second magnetically conductive component are magnetically coupled, resulting in slippage. The speed ratio between them is typically ≥1. The magnetic field strength between the permanent magnet component and the second magnetically conductive component changes proportionally to the separation gap D. When the input speed of the prime mover 1 is constant, changing the separation gap D alters the magnetic field strength between the permanent magnet component and the second magnetically conductive component, causing slippage. For example, a larger separation gap results in greater slippage and more significant deceleration.

[0064] Furthermore, the permanent magnet speed controller described here can also realize energy recovery. For example, when there is a speed difference between the permanent magnet rotor and the conductor rotor, an induced electromotive force will be generated in the winding. When the winding is connected, an induced current loop is formed. By controlling the magnitude of the induced current in the winding, the magnitude of the transmitted torque is controlled, so as to achieve speed regulation and soft start functions. At the same time, the electrical energy in the closed loop can be recovered and reused to charge the batteries of other devices, for example.

[0065] Furthermore, such as Figure 2 As shown, the prime mover 1 is also connected to the controller 6, which can control the output speed of the prime mover 1. Furthermore, speed sensors are installed on the input shaft and the output shaft, which can monitor the speed of the input shaft and the output shaft in real time and feed it back to the controller 6 to achieve PID closed-loop control.

[0066] In this embodiment, the controller 6 can accept input from multiple sources, such as the speed, temperature, pressure, and flow rate of the prime mover 1, the magnetic speed regulator 3, and the fracturing pump 2, and based on the above data and using artificial intelligence models, it can detect equipment failures, lifespan, etc., and provide early warning information.

[0067] For example, the controller 6 can use a PID control algorithm to control, for example, the speed regulating mechanism in real time based on the load fluctuation value of the fracturing pump 2. That is, it can dynamically adjust the separation gap D between the permanent magnet component and the second magnetic conductive component or the shielding area of ​​the shield, thereby adjusting the speed ratio between the input shaft and the output shaft, thereby reducing the impact of the fracturing pump 2 on the prime mover 1. In addition, when the temperature of components such as permanent magnets and bearings in the magnetic speed regulator 3 exceeds a preset value, the controller 6 can also issue a temperature abnormality alarm and automatically disengage the permanent magnet speed regulator.

[0068] In this embodiment, the electromagnetic speed regulator may include a disc-type electromagnetic speed regulator 31 and a cylindrical electromagnetic speed regulator 32, depending on the structural type of the electromagnetic components.

[0069] like Figure 3 and Figure 4 As shown, the disc-type electromagnetic speed controller 31 sets the electromagnetic component and the first magnetic conductive component into a disc structure, which includes an electromagnet 311 and a first magnetic conductive disk 312 arranged opposite to each other. The electromagnet 311 is provided with a first electromagnet 3111. The electromagnet 311 is connected to the first input shaft 313, and the first magnetic conductive disk 312 is connected to the first output shaft 314. Here, the disc-type electromagnetic speed controller 31 mainly relies on the magnetic force of the first electromagnet 3111 embedded in the electromagnet 311 to drive the first magnetic conductive disk 312. After the first electromagnet 3111 is energized, the electromagnet 311 forms a magnetic field, thereby attracting the first magnetic conductive disk 312 and driving the first magnetic conductive disk 312 to rotate.

[0070] Specifically, when the first electromagnet 3111 is not energized, the magnetic disk 311 does not generate magnetic force, and when the magnetic disk 311 rotates, the first conductive disk 312 does not rotate accordingly. After the first electromagnet 3111 is energized, the magnetic disk 311 rotates, causing the first conductive disk 312 to rotate as well. Here, the rotational speed of the first conductive disk 312 is positively correlated with the magnitude of the current flowing through the first electromagnet 3111. Specifically, the larger the current flowing through the first electromagnet 3111, the stronger the magnetic force of the first electromagnet 3111, and the faster the rotational speed of the first conductive disk 312. When the rotational speed of the first conductive disk 312 is the fastest, the speed ratio between the first conductive disk 312 and the magnetic disk 311 is close to 1; in other cases, it is generally less than 1.

[0071] In addition, first speed sensors 315 are respectively provided on the first input shaft 313 and the first output shaft 314 to monitor the speed of the first input shaft 313 and the first output shaft 314 in real time, so as to facilitate the adjustment of the magnitude of the current supplied to the first electromagnet 3111 by, for example, a controller based on the speed.

[0072] Furthermore, such as Figure 4 As shown, the first electromagnet 3111 inside the electromagnet 311 is arranged circumferentially on the electromagnet 311. For example, depending on the actual situation, one or more turns of the first electromagnet 3111 can be arranged to improve the magnetic field coupling strength.

[0073] Specifically, in this embodiment, there are multiple first electromagnets 3111. These multiple first electromagnets 3111 can be inserted into and pass through the electromagnet 311. Here, the insertion direction of the first electromagnets 3111 is consistent with the thickness direction of the electromagnet 311. The multiple electromagnets 311 are arranged circumferentially along the electromagnet 311. The polarities of adjacent first electromagnets 3111 facing the first guide disk 312 are opposite, ensuring the smoothness and continuity of the rotational speed output.

[0074] In another embodiment, a plurality of the first electromagnets 3111 may be arranged in a flat manner on the surface of the magnetic disk 311 opposite to the first conductive disk 312. For example, a plurality of the first electromagnets 3111 may be arranged radially on the surface of the magnetic disk 311, with the polarities of the ends of adjacent first electromagnets 3111 facing the center of the magnetic disk 311 being opposite.

[0075] like Figure 5 and Figure 6 As shown, the structure of the cylindrical electromagnetic speed regulator 32 is similar to that of the disc electromagnetic speed regulator 31. In the cylindrical electromagnetic speed regulator 32, the electromagnetic component and the first magnetic conductive component are set as a cylindrical structure. The cylindrical electromagnetic speed regulator 32 is, for example, a single-cylinder structure, which includes an electromagnetic cylinder 321 and a first magnetic conductive cylinder 322 arranged opposite to each other. A second electromagnet 3211 is provided inside the electromagnetic cylinder 321, and the first magnetic conductive cylinder 322 is wrapped by the electromagnetic cylinder 321.

[0076] The electromagnetic cylinder 321 has an annular first cylinder wall 3212, and the first magnetically conductive cylinder 322 has an annular second cylinder wall 3221. The second cylinder wall 3212 is disposed within the first cylinder wall 3212, and the second electromagnet 3211 is located within the first cylinder wall 3212 and extends along the thickness direction of the electromagnetic cylinder 321. Furthermore, the electromagnetic cylinder 321 is connected to a second input shaft 323, and the first magnetically conductive cylinder 322 is connected to a second output shaft 324.

[0077] By changing the electromagnetic component and the first magnetically conductive component from a disc-shaped structure to a cylindrical structure, the contact area between the electromagnetic component and the first magnetically conductive component is increased, resulting in a stronger magnetic field strength. This allows for the transmission of greater torque, meeting the driving requirements of the high-power fracturing pump 2.

[0078] like Figure 5 As shown, in this embodiment, the opening direction of the first magnetic cylinder 322 can be opposite to the opening direction of the electromagnetic cylinder 321, such as... Figure 6 As shown, the opening direction of the first magnetic cylinder 322 can be the same as the opening direction of the electromagnetic cylinder 321.

[0079] In addition, second speed sensors 325 are respectively provided on the second input shaft 323 and the second output shaft 324 to monitor the speed of the second input shaft 323 and the second output shaft 324 in real time, so as to facilitate the adjustment of the magnitude of the current supplied to the second electromagnet 3211 based on the speed by, for example, a controller.

[0080] In addition, such as Figure 7 As shown, in this embodiment, the electromagnetic cylinder 321 and the first magnetically conductive cylinder 322 can be provided with multiple cylinder structures to form, for example, a double-cylinder structure. For example, the electromagnetic cylinder 321 includes two annular first cylinder walls 3212 to form a double-cylinder structure, so that the second cylinder wall 3221 of the first magnetically conductive cylinder 322 can be inserted between two adjacent first cylinder walls 3212 of the electromagnetic cylinder 321, thereby forming a double-cylinder speed regulator to further enhance the magnetic field strength.

[0081] Furthermore, such as Figure 8 As shown, in this embodiment, there are multiple second electromagnets 3211. These multiple second electromagnets 3211 can be inserted into the first cylinder wall 3212. Here, the insertion direction of the second electromagnets 3211 is consistent with the thickness direction of the electromagnetic cylinder 321. The multiple second electromagnets 3211 are arranged circumferentially along the electromagnetic cylinder 321. The polarities of adjacent second electromagnets 3211 facing the first magnetic cylinder 322 are opposite, ensuring the stability and continuity of the rotational speed output.

[0082] Furthermore, for the disc-type electromagnetic speed regulator 31 and / or the cylindrical electromagnetic speed regulator 32 described above, electromagnets can also be embedded in the first magnetic disk 312 and / or the first magnetic cylinder 322, thereby further enhancing the magnetic field strength formed between the electromagnetic component and the first magnetic component.

[0083] like Figures 9 to 20As shown, the permanent magnet speed regulator is implemented by replacing the electromagnet in the electromagnetic component with a permanent magnet to form a permanent magnet component based on the electromagnetic speed regulator described above. The permanent magnet speed regulator includes a disc-type permanent magnet speed regulator 33 and a cylindrical permanent magnet speed regulator 34.

[0084] Similarly, such as Figure 9 As shown, the disc-type permanent magnet speed controller 33, for example, adopts a single-disc structure, which includes a permanent magnet disk 331 and a second guide disk 332 arranged opposite to each other. A first permanent magnet 3311 is disposed within the permanent magnet disk 331. The permanent magnet disk 331 is connected to a third input shaft 333, and the second guide disk 332 is connected to a third output shaft 334. A first speed regulating mechanism 336 is disposed on the third input shaft 333 and / or the third output shaft 334. In addition, a third speed sensor 335 is disposed on the third input shaft 333 and the third output shaft 334 respectively for real-time monitoring of the rotational speeds of the third input shaft 333 and the third output shaft 334, so as to facilitate control of the first speed regulating mechanism 336 based on the rotational speed, for example, by a controller.

[0085] For the disc-type permanent magnet speed regulator 33, based on the disc-type electromagnetic speed regulator 31 in the above embodiment, the first electromagnet 3111 in the electromagnetic disk 311 is replaced with the first permanent magnet 3311 and the first speed regulating mechanism 336 is added to achieve stepless speed regulation function.

[0086] like Figure 10 As shown, considering that the strength of the magnetic field generated by the first permanent magnet 3311 cannot be adjusted by means of current, the first speed regulating mechanism 336 is used to adjust the distance D, i.e., the air gap, between the permanent magnet 331 and the second conductive magnet 332, thereby adjusting the coupling magnetic force between the permanent magnet 331 and the second conductive magnet 332. The first speed regulating mechanism 336 can be set on either side of the third input shaft 333 or the third output shaft 334.

[0087] In addition, such as Figure 11 As shown, a shielding plate 337 is provided between the permanent disk 331 and the second conductive disk 332. The shielding plate 337 is used to isolate a portion of the magnetism to adjust the coupling magnetic force between the permanent disk 331 and the second conductive disk 332.

[0088] like Figure 12 and Figure 13As shown, the disc-type permanent magnet speed controller 33 adopts a dual-disc structure. The disc-type permanent magnet speed controller 33 includes two permanent magnet disks 331, two second guide disks 332, and a first speed regulating mechanism 336. The two permanent magnet disks 331 are arranged opposite each other on the inner side, and the two second guide disks 332 are respectively arranged on the outer side of each permanent magnet disk 331 and are arranged corresponding to the permanent magnet disks 331. The distance between the two permanent magnet disks 331 can be adjusted by the first speed regulating mechanism 336.

[0089] Further, the first speed regulating mechanism 336 is connected to the third input shaft 333, and includes a shaft segment 3361 and a sleeve segment 3362. The shaft segment 3361 is connected to the third output shaft 333. One permanent disk 331 is slidably disposed on the sleeve segment 3362 along the axial direction. The two permanent disks 331 are connected by a rack and pinion assembly. One permanent disk 331 is provided with a first rack 3363, and the other permanent disk 331 is provided with a second rack 3364. The first rack 3363 and the second rack 3364 are meshed with a gear 3365. The third output shaft 334 includes a frame 3341. The two second guide disks 332 are respectively disposed on two opposite inner surfaces of the frame 3341, such that the two second guide disks 332 are respectively disposed on the outer sides of the two permanent disks 331. The two second guide disks 332 rotate together with the third output shaft 334.

[0090] When the permanent disk 331 closest to the third input shaft 333 moves axially away from the third input shaft 333, it drives another permanent disk 331 to move towards the third input shaft 333 via a rack and pinion assembly, thereby adjusting the distance between the two permanent disks 331, and similarly adjusting the distance between each permanent disk 331 and its corresponding second guide disk 332. In this way, the movement of the permanent disks 331 adjusts the coupling force, thereby adjusting the air gap between the permanent disk 331 and the second guide disk 332.

[0091] Similarly, such as Figure 14As shown, the structure of the cylindrical permanent magnet speed controller 34 is similar to that of the disc permanent magnet speed controller 33. The cylindrical permanent magnet speed controller 32, for example, adopts a single-cylinder structure, comprising a permanent magnet cylinder 341 and a second magnetic guide cylinder 342 arranged opposite each other. The second magnetic guide cylinder 342 can be enclosed by the permanent magnet cylinder 341. A second permanent magnet 3411 is disposed inside the permanent magnet cylinder 341. The permanent magnet cylinder 341 is connected to a fourth input shaft 343, and the second magnetic guide cylinder 342 is connected to a fourth output shaft 344. A second speed regulating mechanism 346 is disposed on the fourth input shaft 343 and / or the fourth output shaft 344. Furthermore, a fourth speed sensor 345 is respectively disposed on the fourth input shaft 343 and the fourth output shaft 344 for real-time monitoring of the speeds of the fourth input shaft 343 and the fourth output shaft 344, facilitating control of the second speed regulating mechanism 346 based on the speed by a controller.

[0092] Compared to the disc-type permanent magnet speed controller 33, the cylindrical permanent magnet speed controller 34 only replaces the permanent magnet disk 331 and the second magnetic disk 332 with the permanent magnet cylinder 341 and the second magnetic cylinder 342, thereby increasing the coupling strength between the two magnetic fields and thus increasing the transmitted torque.

[0093] In the case of a single-cylinder structure, the permanent magnet cylinder 341 has an annular third cylinder wall 3412, the second magnetic cylinder 342 has an annular fourth cylinder wall 3421, the fourth cylinder wall 3421 is disposed inside the third cylinder wall 3412, and the second permanent magnet 3411 is located inside the third cylinder wall 3412 and extends along the thickness direction of the permanent magnet cylinder 341.

[0094] In addition, such as Figure 14 As shown, in this embodiment, the opening direction of the second magnetic cylinder 342 can be opposite to the opening direction of the permanent magnet cylinder 341, such as... Figure 15 As shown, the opening direction of the second magnetic cylinder 342 can be the same as the opening direction of the permanent magnet cylinder 341.

[0095] like Figure 16 and Figure 17 As shown, in this embodiment, the permanent magnet cylinder 341 and the first magnetically conductive cylinder 342 can be provided with multiple cylinder structures to form, for example, a double-cylinder structure. For example, the permanent magnet cylinder 341 includes two annular third cylinder walls 3412 to form a double-cylinder structure, so that the fourth cylinder wall 3421 of the second magnetically conductive cylinder 342 can be inserted between two adjacent third cylinder walls 3412 of the permanent magnet cylinder 341, thereby forming a double-cylinder speed regulator to further enhance the magnetic field strength.

[0096] In addition, such as Figure 18 and Figure 19As shown, a shielding cylinder 347 is provided between the cylinder walls of the permanent magnet cylinder 341 and the second magnetic conductive cylinder 342. The shielding cylinder 347 is used to isolate a portion of the magnetism to adjust the coupling magnetic force strength between the permanent magnet cylinder 341 and the second magnetic conductive cylinder 342.

[0097] In addition, to further enhance the magnetic field strength, an electromagnet can also be embedded in the second magnetic disk 332 or the second magnetic cylinder 342.

[0098] The continuously variable speed fracturing device described in this embodiment can be loaded in various ways, such as skid-mounted, vehicle-mounted, or trailer-mounted. For example... Figure 20 As shown, the prime mover 1, the magnetic speed regulator 3, and the fracturing pump 2 are all mounted on the skid 7, which is a plate structure, or as shown in the diagram. Figure 21 As shown, the prime mover 1, the magnetic speed regulator 3, and the fracturing pump 2 are all mounted on the bottom skid 8. A protective frame 9 is mounted on the bottom skid 8, and the prime mover 1, the magnetic speed regulator 3, and the fracturing pump 2 are all mounted inside the protective frame 9.

[0099] like Figure 22 As shown, the continuously variable speed fracturing device can also be mounted on the rear of the chassis 10a to form a vehicle-mounted configuration, where the prime mover 1 is positioned near the front of the vehicle and the fracturing pump 2 is positioned near the rear. Figure 23 As shown, the continuously variable speed fracturing device can also be mounted on the trailer 10b to form a vehicle-mounted configuration. Here, the prime mover 1 is located near the front of the trailer 10b, and the fracturing pump 2 is located near the rear of the trailer 10b.

[0100] The continuously variable speed fracturing device described in this embodiment of the invention is applicable to different situations. It uses the prime mover 1 to directly drive the fracturing pump 2, and employs the magnetic speed regulator 3 for stepless speed regulation, thereby achieving different flow rate outputs from the fracturing pump 2. For example, Figure 3Taking the disc-type electromagnetic speed regulator 31 as an example, when the prime mover 1 starts, the electromagnetic disk 311 is not energized and therefore has no magnetic force. The first guide disk 312 does not rotate, but the electromagnetic disk 311 rotates with the prime mover 1. After the prime mover 1 stabilizes, the electromagnetic disk 311 is energized. As the current increases, the magnetic force increases, and the first guide disk 312 drives the fracturing pump 2 to gradually rotate until the fracturing pump 2 reaches the required speed, at which point the speed remains stable, thus maintaining a stable flow rate. When it is necessary to adjust the flow rate of the fracturing pump 2, different output speeds can be achieved directly by adjusting the current of the disc-type electromagnetic speed regulator 31, for example, through a controller, thus achieving different flow rates from the fracturing pump 2. Compared with the gearbox solution used in the prior art, this makes the speed change process smoother and reduces the load impact of flow rate changes on the prime mover 1.

[0101] The second embodiment of this utility model provides a fracturing system. As mentioned above, the fracturing system includes a prime mover 1 and a fracturing pump 2. A magnetic speed regulator 3 is provided between the prime mover 1 and the fracturing pump 2. The speed output of the prime mover 1 is steplessly regulated by the magnetic speed regulator 3 and input to the fracturing pump 2, thereby enabling the fracturing pump 2 to be driven based on different speeds.

[0102] like Figures 24 to 27 As shown, the fracturing system in this embodiment is suitable for different fracturing operation scenarios. The prime mover 1 can have different structures and forms. In one embodiment, such as... Figure 24 As shown, the fracturing system includes a turbine 11 and a fracturing pump 2. The turbine 11 is a single-shaft turbine. A magnetic speed governor 3 is provided between the turbine 11 and the fracturing pump 2. The magnetic speed governor 3 continuously regulates the speed output of the turbine 11 and inputs it to the fracturing pump 2, thereby enabling the fracturing pump 2 to be driven based on different speeds. The flow rate of the fracturing pump 2 is adjusted by the magnetic speed governor 3.

[0103] A speed reduction device 12 is installed between the turbine 11 and the magnetic speed governor 3. This is mainly because the output speed of the turbine 11 is too high to directly drive the fracturing pump 2. Compared with the direct drive connection, the turbine 11 is reduced in speed by the speed reduction device 12, which then drives the fracturing pump 2 and the speed is adjusted by the magnetic speed governor 3. The speed reduction device 12 mainly reduces the excessively high output speed of the turbine 11 to a certain speed range to meet the input speed requirements of the magnetic speed governor 3. The change in the output flow of the fracturing pump 2 is mainly achieved by the stepless speed regulation function of the magnetic speed governor 3.

[0104] In one implementation, such as Figure 25 As shown, the fracturing system includes an engine 13 and a fracturing pump 2. The engine 13 is a reciprocating engine. A speed change device 14 is provided between the engine 13 and the fracturing pump 2. This is mainly because the engine 13 has a high output speed. After the speed is reduced by the speed change device 14, the fracturing pump 2 is driven to work. The speed change device 14 mainly reduces the ultra-high output speed of the engine 13 to a certain speed range, that is, meets the working speed of the fracturing pump. The output flow rate of the fracturing pump is mainly achieved by stepless speed regulation by a magnetic speed controller.

[0105] The fracturing system also includes an auxiliary power unit 20, which is connected to the output shaft of the transmission device 14 via a transmission device 15. The auxiliary power unit 20 assists in gear shifting, reducing the load impact caused by gear shifting in the transmission device 14. Specifically, the auxiliary power unit 20 includes a motor 21 and a magnetic speed regulator 3. The input shaft of the magnetic speed regulator 3 is connected to the motor 21, and the output shaft of the magnetic speed regulator 3 is connected to the output shaft of the transmission device 14 via a gear set 22. Couplings are provided between the motor 21 and the magnetic speed regulator 3, and between the magnetic speed regulator 3 and the gear set 22. The magnetic speed regulator 3, in conjunction with the transmission device 14, allows the fracturing pump 2 to be driven at different speeds, thereby adjusting the flow rate of the fracturing pump 2. Furthermore, in this embodiment, the magnetic speed regulator 3 can also alleviate power fluctuations caused by formation pressure changes during the operation of the fracturing pump 2. In this embodiment, the controller 6 controls the motor 21, the magnetic speed regulator 3, the engine 13, and the fracturing pump 2 to work together. The motor 21 here is an integrated starter unit, which can act as an engine starter motor or a generator.

[0106] In this embodiment, the flow rate regulation of the fracturing pump 2 is mainly achieved through the gear shifting regulation of the transmission device 14. The operating system can operate in a first working mode and a second working mode. In the first working mode, the magnetic speed regulator 3 is mainly used for gear shifting assistance. Specifically, when the engine 13 starts, the transmission device 14 is in neutral. After the engine 13 stabilizes, gear shifting is performed through the transmission device 14. During gear shifting, the engine 13 and the motor 21 jointly drive the fracturing pump 2. After gear shifting is completed, the motor 21 gradually disengages from its driving state, and the engine 13 independently drives the fracturing pump. In the second working mode, the magnetic speed regulator 3 is mainly used for power regulation. Specifically, when the input speed and output flow rate of the fracturing pump 2 are constant, when the mixed fluid discharged by the fracturing pump 2 encounters resistance in the formation, the pressure of the discharged fluid from the fracturing pump 2 increases, thus requiring the fracturing pump 2 to have greater torque, i.e., greater input power. When the pressure rises sharply, the engine 13 cannot increase its power in time. At this time, the auxiliary power unit 20 intervenes, controlling the speed of the motor 21 to synchronize with the input speed of the fracturing pump 2. Then, through the engagement of the magnetic speed governor 3, the motor 21 and the engine 13 jointly drive the fracturing pump 2. As the power of the engine 13 gradually increases, the motor 21 gradually exits the driving state. When the pressure of the fracturing fluid decreases, that is, when the input power of the fracturing pump 2 decreases, the magnetic speed governor 3 closes and drives the motor 21 to generate electricity. At this time, the motor 21 acts as a load for energy recovery. The energy recovery is completed when the power of the engine 13 drops to the power range required by the fracturing pump 2.

[0107] Another implementation method is, for example Figure 26 As shown, the operating system can also employ an auxiliary power unit including a magnetic speed governor to achieve serial power assistance. For example, the engine 13 is connected in series with the auxiliary power unit 20. The auxiliary power unit 20 includes a motor 21 and a first magnetic speed governor 3a. A second magnetic speed governor 3b is provided between the engine 13 and the fracturing pump 2. Thus, the auxiliary power unit 20, the engine 13, the second magnetic speed governor 3b, and the fracturing pump 2 are connected sequentially. Furthermore, couplings can be provided between the engine 13 and the second magnetic speed governor 3b, and between the second magnetic speed governor 3b and the fracturing pump 2.

[0108] like Figure 27As shown, the operating system can also employ an auxiliary power unit including a magnetic speed governor to achieve parallel assistance. For example, the engine 13 is connected in parallel to the auxiliary power unit 20, which includes a motor 21 and a first magnetic speed governor 3a. A second magnetic speed governor 3b is provided between the engine 13 and the fracturing pump 2. The auxiliary power unit 20 is connected to the output shaft of the engine 13 via a transmission device 15. Furthermore, couplings can be provided between the engine 13 and the second magnetic speed governor 3b, and between the second magnetic speed governor 3b and the fracturing pump 2.

[0109] When using the operating system described in this embodiment, the flow rate of the fracturing pump 2 can be adjusted by the second magnetic speed regulator 3b. Based on the above scheme, this embodiment uses a series (or parallel) auxiliary power unit to achieve functions such as independent drive, hybrid drive, independent power generation, and energy recovery. The flow rate change of the fracturing pump 2 is mainly achieved by changing the output speed of the second magnetic speed regulator 3b. The motor 21 is an integrated starter unit, which can act as an engine starter motor or a generator.

[0110] Specifically, the operating system in this embodiment can operate in a first operating mode, a second operating mode, and a third operating mode. The first operating mode is an independent drive mode, in which only the engine 13 drives the fracturing pump 2. In this mode, the first magnetic speed regulator 3a is disconnected, and the motor 21 is not used to drive the fracturing pump 2. The second operating mode is a hybrid drive mode, in which the engine 13 and the motor 21 jointly drive the fracturing pump 2. Specifically, when the engine 13 starts or when the power of the fracturing pump 2 fluctuates, the engine 13 and the motor 21 jointly drive the fracturing pump 2. After the fracturing pump 2 has started, the motor 21 can gradually withdraw from the driving state; or, after the power of the engine 13 meets the power requirements of the fracturing pump 2, the motor 21 can also withdraw from the driving device. The closing, opening, closing, and speed regulation of the motor 21, the engine 13, and the first magnetic speed regulator 3a are all uniformly controlled by the controller 6. Furthermore, when the output power of the engine 13 exceeds the power required by the fracturing pump 2, the motor 21 acts as a generator to recover excess energy until the power of the engine 13 meets the requirements of the fracturing pump 2. At this point, the motor 21 exits the driving state, and the fracturing pump 2 is driven independently by the engine 13. When the output power of the engine 13 is less than the power required by the fracturing pump 2, the controller 6 controls the motor 21 to reach synchronous speed and then closes the first magnetic speed regulator 3a, allowing the motor 21 and the engine 13 to jointly drive the fracturing pump 2. The third operating mode is an independent power generation mode. In this mode, the first magnetic speed regulator 3a operates while the second magnetic speed regulator 3b does not operate (equivalent to disconnection). The engine 13 drives the motor 21 alone to generate electricity, which can then power the energy storage unit or be used for emergency lighting. After fracturing operations are completed, energy can also be recovered using the engine 13's rotational speed when the engine 13 is shut down.

[0111] The embodiments disclosed herein have advantages such as fast response speed, low failure rate, maintenance-free operation, and no contact wear when adjusting the speed of equipment such as fracturing, sand mixing, and cementing. They also have functions such as rapid start-up, stepless speed regulation, and vibration isolation.

[0112] Furthermore, the features of the embodiments shown in the accompanying drawings or the various embodiments mentioned in this specification should not be construed as independent embodiments. Rather, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the accompanying drawings.

[0113] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An electromagnetic speed controller for stepless speed regulation, characterized in that, It adopts a disc or cylindrical structure and includes an electromagnetic component and a first magnetically conductive component arranged opposite to each other. The electromagnetic component is connected to the prime mover through an input shaft and an electromagnet is installed inside the electromagnetic component. The first magnetically conductive component is connected to the working unit through an output shaft.

2. The electromagnetic speed regulator for stepless speed regulation according to claim 1, characterized in that, The electromagnetic speed controller is a single-disc structure, which includes an electromagnet and a first guide disk arranged opposite each other. A first electromagnet is installed inside the electromagnet. The electromagnet is connected to a first input shaft, and the first guide disk is connected to a first output shaft.

3. The electromagnetic speed regulator for stepless speed regulation according to claim 2, characterized in that, The first electromagnet is disposed through the magnetic disk, and there are multiple first electromagnets arranged circumferentially along the magnetic disk. The polarities of adjacent first electromagnets facing the first magnetic disk are opposite.

4. The electromagnetic speed regulator for stepless speed regulation according to claim 2, characterized in that, The first electromagnets are laid flat on the surface of the electronic disk opposite to the first conductive disk. There are multiple first electromagnets, which are arranged radially. The polarities of the ends of adjacent first electromagnets facing the center of the electronic disk are opposite.

5. The electromagnetic speed regulator for stepless speed regulation according to claim 1, characterized in that, The electromagnetic speed regulator is a single-cylinder structure, which includes an electromagnetic cylinder and a first magnetic cylinder arranged opposite each other. A second electromagnet is installed inside the electromagnetic cylinder. The first magnetic cylinder is wrapped by the electromagnetic cylinder. The electromagnetic cylinder is connected to a second input shaft, and the first magnetic cylinder is connected to a second output shaft.

6. The electromagnetic speed regulator for stepless speed regulation according to claim 5, characterized in that, The electromagnetic cylinder has an annular first cylinder wall, and the first magnetically conductive cylinder has an annular second cylinder wall. The second cylinder wall is disposed inside the first cylinder wall. The second electromagnet is located inside the first cylinder wall and extends along the thickness direction of the electromagnetic cylinder. The opening direction of the first magnetically conductive cylinder is opposite to or the same as the opening direction of the electromagnetic cylinder.

7. The electromagnetic speed regulator for stepless speed regulation according to claim 6, characterized in that, The electromagnetic speed regulator has a double-cylinder structure. The electromagnetic cylinder includes two annular first cylinder walls, and the second cylinder wall is inserted between the two first cylinder walls of the electromagnetic cylinder.

8. A permanent magnet speed controller for stepless speed regulation, characterized in that, It adopts a disc or cylindrical structure, and includes a permanent magnet component and a second magnetic guiding component arranged opposite to each other. The permanent magnet component is provided with a permanent magnet. The permanent magnet component is connected to the prime mover through an input shaft. The second magnetic guiding component is connected to the working unit through an output shaft. A speed regulating mechanism is provided on the input shaft and / or the output shaft.

9. The permanent magnet speed controller for stepless speed regulation according to claim 8, characterized in that, The permanent magnet speed controller is a single-disc structure, which includes a permanent magnet disk and a second guide disk arranged opposite to each other. A first permanent magnet is disposed inside the permanent magnet disk. The permanent magnet disk is connected to a third input shaft. The second guide disk is connected to a third output shaft. A first speed regulating mechanism is disposed on the third input shaft and / or the third output shaft.

10. The permanent magnet speed controller for stepless speed regulation according to claim 9, characterized in that, A shielding plate is provided between the permanent disk and the second conductive disk.

11. The permanent magnet speed controller for stepless speed regulation according to claim 9, characterized in that, The permanent magnet speed controller has a dual-disc structure, including two permanent magnet disks and two second guide disks. The two permanent magnet disks are arranged opposite each other, and the two second guide disks are respectively arranged outside each permanent magnet disk and corresponding to the permanent magnet disks. The distance between the two permanent magnet disks is adjusted by the first speed control mechanism.

12. The permanent magnet speed controller for stepless speed regulation according to claim 8, characterized in that, The permanent magnet speed regulator is a single-cylinder structure, which includes a permanent magnet cylinder and a second magnetic guide cylinder arranged opposite to each other. The second magnetic guide cylinder is wrapped by the permanent magnet cylinder. A second permanent magnet is disposed inside the permanent magnet cylinder. The permanent magnet cylinder is connected to a fourth input shaft. The second magnetic guide cylinder is connected to a fourth output shaft. A second speed regulating mechanism is disposed on the fourth input shaft and / or the fourth output shaft.

13. The permanent magnet speed controller for stepless speed regulation according to claim 12, characterized in that, A shielding cylinder is provided between the walls of the permanent magnet cylinder and the second magnetic cylinder.

14. A continuously variable speed operating system, characterized in that, The device includes a prime mover and a working unit. An electromagnetic speed regulator according to any one of claims 1-7 or a permanent magnet speed regulator according to any one of claims 8-13 is provided between the prime mover and the working unit. The speed output by the prime mover is steplessly regulated by the electromagnetic speed regulator or the permanent magnet speed regulator and input to the working unit.

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