Permanent magnet eddy current speed regulation system

Abstract

The invention discloses a permanent magnet eddy current speed regulation system, which relates to the technical field of permanent magnet eddy current speed regulation and comprises a permanent magnet eddy current speed regulator. Positioning grooves which extend from one end to the other end and are equal in depth are formed in the upper surface of the main bottom plate, and the positioning grooves are I-shaped and comprise a first groove, a second groove and a third groove which are connected in sequence. The first support is fixed in the first groove and is in contact positioning with one corner of the first groove, the air gap adjusting assembly is fixed in the second groove and is in contact positioning with one side wall of the second groove, and the third support is fixed in the third groove and is in contact positioning with one corner of the third groove. The input shaft is rotationally installed on the first support, and the conductor rotor is fixedly connected with the input shaft. The spline housing is arranged on the output shaft in a sliding and sleeving mode and rotationally installed on the second support. The output shaft is rotationally installed on the third support. The air gap adjusting assembly is fixedly connected with the second support and used for driving the second support to slide. Compared with the prior art, the permanent magnet eddy current speed regulation system can improve the mounting and dismounting convenience, the mounting precision and the structural stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of permanent magnet eddy current speed regulation, in particular to a permanent magnet eddy current speed regulation system. BACKGROUND

[0002] The permanent magnet eddy current speed regulator is a device for realizing non-contact torque transmission and speed regulation based on the electromagnetic induction principle between a permanent magnet and a conductor. The core working principle is that the permanent magnet rotates to generate an alternating magnetic field, the conductor cuts the magnetic induction lines in the magnetic field to generate eddy current, and the eddy current magnetic field interacts with the permanent magnet magnetic field to drive the load to rotate, and the speed is adjusted by adjusting the magnetic field coupling strength.

[0003] The device mainly consists of a permanent magnet assembly and a conductor assembly, and there is an air gap between the two, without mechanical contact, so it has the characteristics of soft connection and low maintenance.

[0004] The permanent magnet eddy current speed regulation system comprises a permanent magnet eddy current speed regulator and a shell, and the shell encapsulates the permanent magnet eddy current speed regulator. The existing permanent magnet eddy current speed regulation system mainly has the following problems:

[0005] The parts of the permanent magnet eddy current speed regulator are independently installed on the shell, and the installation precision is not easy to control, and the installation and disassembly are complex. The input shaft and the output shaft of the permanent magnet eddy current speed regulator are rotatably installed on the side wall of the shell in a cantilevered manner, the bending moment is large, and the side wall of the shell is easy to deform and crack. SUMMARY

[0006] The purpose of the present application is to provide a permanent magnet eddy current speed regulation system to solve the problems existing in the related art and improve the convenience of installation and disassembly, installation precision and structural stability.

[0007] To achieve the above purpose, the present application provides the following solutions:

[0008] The present application discloses a permanent magnet eddy current speed regulation system, comprising:

[0009] The shell comprises a base and a protective cover.

[0010] The permanent magnet eddy current speed controller is a cylindrical speed controller, comprising a base plate, bracket one, bracket two, bracket three, input shaft, conductor rotor, spline sleeve, output shaft, permanent magnet rotor, and air gap adjustment assembly. The base plate is fixedly connected to the base and the protective cover. The upper surface of the base plate has a positioning groove of equal depth extending from one end to the other. The positioning groove is I-shaped and includes groove one, groove two, and groove three connected in sequence. Bracket one is fixed in groove one and is positioned in contact with one corner of groove one. The air gap adjustment assembly is fixed to the base plate. The first bracket is positioned within the second groove and contacts one side wall of the second groove; the second bracket is fixed within the third groove and contacts one corner of the third groove; the input shaft is rotatably mounted on the first bracket, and the conductor rotor is fixedly connected to the input shaft; the spline sleeve is slidably fitted onto the output shaft and rotatably mounted on the second bracket; the output shaft is rotatably mounted on the third bracket and collinear with the input shaft; the air gap adjustment assembly is fixedly connected to the second bracket and is used to drive the second bracket to slide in a direction parallel to the input shaft.

[0011] Preferably, the spline sleeve is a ball spline sleeve; the permanent magnet eddy current speed controller also includes a telescopic sleeve, which is located between the second bracket and the third bracket and is sleeved on the outside of the output shaft; the two ends of the telescopic sleeve are respectively connected to the second bracket and the third bracket.

[0012] Preferably, the first bracket includes a bearing and a bearing housing; the outer ring of the first bearing mates with the bearing housing, and the inner ring of the first bearing mates with the input shaft; the second bracket includes a bearing and a bearing housing; the outer ring of the second bearing mates with the bearing housing, and the inner ring of the second bearing mates with the spline sleeve; the third bracket includes a bearing and a bearing housing; the outer ring of the third bearing mates with the bearing housing, and the inner ring of the third bearing mates with the output shaft.

[0013] Preferably, the air gap adjustment assembly is a lead screw module, including a lead screw and a slider that is threadedly engaged with the lead screw; the slider is fixedly connected to the bearing housing.

[0014] Preferably, the permanent magnet eddy current speed control system further includes a position sensor, a speed sensor, and a temperature sensor; the position sensor is stationary relative to the bearing housing three and is used to monitor the position of the bearing housing two; the speed sensor is used to monitor the rotational speed of the output shaft; and there are multiple temperature sensors, which are respectively fixedly connected to the bearing housing one and the bearing housing three and are used to monitor the temperature of the outer rings of the bearing housing one and the bearing housing three.

[0015] Preferably, the bearing housing one, the bearing housing two, and the bearing housing three each include reinforcing ribs, and a bearing mounting cylinder, a vertical plate, and a base plate that are fixedly connected from top to bottom; the vertical plate is perpendicular to the input shaft and has two legs, with an airflow channel between the two legs; there are multiple reinforcing ribs located on both sides of the airflow channel; the reinforcing ribs are fixedly connected to the bearing mounting cylinder, the vertical plate, and the base plate respectively, and are perpendicular to the vertical plate and the base plate.

[0016] Preferably, each of the two legs of the upright plate of the bearing housing one and the bearing housing three is connected to a base plate, so as to form a space between the two base plates to avoid the air gap adjustment assembly.

[0017] Preferably, the first bearing includes a deep groove ball bearing and a cylindrical roller bearing, with a clearance between the deep groove ball bearing and the cylindrical roller bearing, and the deep groove ball bearing is located on the side of the cylindrical roller bearing away from the second support; the second bearing includes two deep groove ball bearings, which abut against each other; the third bearing includes a deep groove ball bearing; the first bearing housing has two upright plates with a clearance; the second bearing housing and the third bearing housing have one upright plate.

[0018] Preferably, the conductor rotor is fixed with a plurality of blades for causing airflow to flow axially along the input shaft, and a volute is provided on the protective cover in the region outside the conductor rotor.

[0019] Preferably, the inner wall of the protective cover is lined with sound-insulating cotton.

[0020] Compared with related technologies, the present invention achieves the following technical effects:

[0021] The upper surface of the base plate has a positioning groove of equal depth extending from one end to the other along the length direction. This groove, running through the entire length direction, facilitates completion in a single machining operation (e.g., milling) and allows components to slide and adjust their position within the groove, maintaining a constant height during sliding. The positioning groove is I-shaped, and by utilizing the structural feature that the widths of grooves one and three are greater than the width of groove two, both grooves one and three have two right angles for positioning. By quickly positioning bracket one against a positioning surface in the length direction and a positioning surface in the width direction, positioning the air gap adjustment component against a positioning surface in the width direction, and positioning bracket three against a positioning surface in the length direction and a positioning surface in the width direction, rapid and accurate positioning of brackets one and three in the length and width directions can be achieved. This simplifies the installation process while ensuring installation accuracy. Since the air gap adjustment component is not in contact with the positioning surface in the length direction, its position in the length direction can be flexibly adjusted according to actual conditions.

[0022] Since the input shaft and the conductor rotor are supported by support one, the output shaft, the spline sleeve and the permanent magnet rotor are supported by support two and support three, support two is supported by the air gap adjusting assembly, that is, the embodiment does not adopt the cantilever installation mode on the side wall of the shell, but is supported by a plurality of support components fixed on the total base plate, thereby avoiding the problems of large bending moment and easy deformation and cracking of the side wall of the shell in the existing cantilever installation mode, ensuring the structural stability and facilitating assembly and disassembly. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and all other drawings obtained by those skilled in the art without creative labor based on these drawings also belong to the protection scope of the present application.

[0024] Fig. 1 A schematic diagram of the permanent magnet eddy current speed regulation system in some examples of the present application;

[0025] Fig. 2 A schematic diagram of the permanent magnet eddy current speed regulator in some examples of the present application;

[0026] Fig. 3 A sectional view of the permanent magnet eddy current speed regulator in some examples of the present application.

[0027] In the figure: 1 - base; 2 - adjustment block; 3 - lifting ring screw; 4 - protective cover; 5 - volute; 6 - total base plate; 7 - input shaft; 8 - output shaft; 9 - driving motor; 10 - support one; 11 - hand wheel; 12 - conductor rotor; 13 - support two; 14 - telescopic sleeve; 15 - support three; 16 - lead screw module; 17 - transmission belt; 18 - temperature sensor one; 19 - right end cover one; 20 - left end cover one; 21 - nut one; 22 - deep groove ball bearing one; 23 - sleeve one; 24 - cylindrical roller bearing one; 25 - connecting sleeve; 26 - permanent magnet rotor; 27 - ball spline sleeve; 28 - output shaft end limit plate; 29 - speed sensor; 30 - temperature sensor three; 31 - position sensor; 32 - input shaft end limit plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor also belong to the protection scope of the present application.

[0029] The purpose of this invention is to provide a permanent magnet eddy current speed regulation system to solve the problems existing in the above-mentioned related technologies and improve the ease of assembly and disassembly, installation accuracy and structural stability.

[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. In this embodiment, the length direction refers to the direction parallel to the input shaft (i.e., parallel to the output shaft), and the width direction refers to the direction perpendicular to the input shaft and parallel to the main base plate.

[0031] Reference Figs. 1-3 This embodiment provides a permanent magnet eddy current speed regulation system, including a housing and a permanent magnet eddy current speed regulator.

[0032] The outer casing includes a base 1 and a protective cover 4. The protective cover 4 has a cover-like structure with the opening facing downwards. The permanent magnet eddy current speed controller is a cylindrical speed controller, including a main base plate 6, a first bracket 10, a second bracket 13, a third bracket 15, an input shaft 7, a conductor rotor 12, a spline sleeve, an output shaft 8, a permanent magnet rotor 26, and an air gap adjustment assembly. The main base plate 6 is fixedly connected to the base 1 and the protective cover 4, for example, by bolts. The protective cover 4 and the base 1 are located on the upper and lower sides of the main base plate 6, respectively. The main base plate 6 has a mounting hole 1, through which connecting bolts fix the main base plate 6 to the base 1. The base 1 has a mounting hole 2, through which anchor bolts are fixed to the ground of the installation site. The upper surface of the main base plate 6 has a positioning groove of equal depth extending from one end to the other, which facilitates one-time machining (e.g., milling), allows the component to slide and adjust its position in the positioning groove, and ensures that the bottom of the positioning groove is at the same height at different positions, facilitating positioning in the height direction. The positioning groove is I-shaped, comprising three grooves connected in sequence: groove one, groove two, and groove three. Figs. 1-3From the provided perspective, groove one is located at the left end, and groove three is located at the right end. The "I"-shaped structure gives groove one and groove three two positioning surfaces in the width direction and two positioning surfaces in the length direction, while groove two has two positioning surfaces in the width direction. Bracket one 10 is fixed inside groove one and positioned in contact with one corner of groove one, that is, in contact with one positioning surface in the length direction (the positioning surface in the length direction refers to the normal direction of the length direction, used to position the adjacent abutting parts in the length direction) and one positioning surface in the width direction (the positioning surface in the width direction refers to the normal direction of the width direction, used to position the adjacent abutting parts in the width direction). The air gap adjustment component is fixed inside groove two and positioned in contact with one side wall of groove two, that is, in contact with one positioning surface in the width direction. Bracket three 15 is fixed inside groove three and positioned in contact with one corner of groove three, that is, in contact with one positioning surface in the length direction and one positioning surface in the width direction. Bracket one 10, bracket two 13, and bracket three 15 can be fixed to the main base plate 6 with bolts. The positioning surfaces in the width direction of bracket 10, the air gap adjustment assembly, and bracket 315 are located on the same side of the positioning groove. The input shaft 7 is rotatably mounted on bracket 10, and the conductor rotor 12 is fixedly connected to the input shaft 7. A spline sleeve is slidably fitted onto the output shaft 8 and rotatably mounted on bracket 213. The output shaft 8 is rotatably mounted on bracket 315 and is collinear with the input shaft 7. The air gap adjustment assembly is fixedly connected to bracket 213 and is used to drive bracket 213 to slide in a direction parallel to the input shaft 7. The input shaft 7 and the conductor rotor 12 are supported by bracket 10, while the output shaft 8, the spline sleeve, and the permanent magnet rotor 26 are jointly supported by bracket 213 and bracket 315. Bracket 213 is supported by the air gap adjustment assembly. The protective cover 4 has through holes for the input shaft 7 and the output shaft 8 to pass through. The outer shell separates the inner and outer structures, thus preventing rainwater and dust from entering, avoiding damage to the internal structure due to mechanical collisions, eliminating safety hazards caused by the exposure of high-speed rotating parts, preventing internal oil and other spills, and reducing noise.

[0033] The working principle of the permanent magnet eddy current speed control system in this embodiment is as follows:

[0034] The main structure for transmitting torque in the permanent magnet eddy current speed controller is the conductor rotor 12 and the permanent magnet rotor 26. The conductor rotor 12 has an annular conductor, and the permanent magnet rotor 26 has an even number of permanent magnets with approximately fan-shaped cross sections evenly distributed in the circumferential direction. The polarities of adjacent permanent magnets on the same side (radial inner side or radial outer side) are opposite.

[0035] Since the permanent magnet eddy current speed controller is a cylindrical speed controller, the annular conductor is located outside the permanent magnet rotor 26, and the radial distance between each permanent magnet and the annular conductor is approximately the same, the axial interaction force between the conductor rotor 12 and the permanent magnet rotor 26 can be ignored.

[0036] When the conductor rotor 12 starts to rotate, the permanent magnet rotor 26 is initially stationary. The two rotors rotate relative to each other around a common axis. The annular conductor moves by cutting the magnetic field lines of the permanent magnet. An eddy current field is induced inside the annular conductor. The magnetic field of the eddy current field and the magnetic field of the permanent magnet pull and push each other, generating a circumferential driving torque. This torque drives the permanent magnet rotor 26 to rotate.

[0037] As the speed of the permanent magnet rotor 26 increases, the speed difference between the two rotors decreases. The smaller the speed difference, the greater the operating torque; conversely, the greater the speed difference, the smaller the operating torque. Eventually, the speed difference stabilizes at a certain value, and the driving torque between the two rotors correspondingly stabilizes at a certain value. At this point, the two rotors rotate synchronously according to this speed difference.

[0038] Input shaft 7 is generally driven by a motor. During normal operation (excluding the start-up and shutdown processes), the motor's speed generally remains constant, therefore the speed of conductor rotor 12 also remains constant. When the load speed increases, the speed of permanent magnet rotor 26 increases, and the speed difference between conductor rotor 12 and permanent magnet rotor 26 decreases accordingly, so the working torque should increase (motor working power ≈ working torque * motor speed, therefore the motor working power also increases). At this time, the air gap adjustment device should push the permanent magnet rotor 26 into the inner cavity of conductor rotor 12, increasing the meshing area between the permanent magnet and the annular conductor. When the load speed decreases, the speed difference increases accordingly, and the air gap adjustment device should push the permanent magnet rotor 26 out of the inner cavity of conductor rotor 12, decreasing the meshing area between the permanent magnet and the annular conductor, i.e., decreasing the working torque, and thus the motor working power also decreases.

[0039] The upper surface of the base plate 6 is provided with a positioning groove of equal depth extending from one end to the other along the length direction. This groove, which runs through the entire length direction, facilitates completion in a single machining operation (e.g., milling) and allows the component to slide and adjust its position within the positioning groove, maintaining a constant height during sliding. The positioning groove is I-shaped, and by utilizing the structural feature that the widths of grooves one and three are greater than the width of groove two, both grooves one and three have two positioning right angles. By quickly positioning bracket one 10 against a positioning surface in the length direction and a positioning surface in the width direction, positioning the air gap adjustment component against a positioning surface in the width direction, and positioning bracket three 15 against a positioning surface in the length direction and a positioning surface in the width direction, rapid and accurate positioning of bracket one 10 and bracket three 15 in the length and width directions can be achieved, simplifying the installation process and ensuring installation accuracy. Since the air gap adjustment component is not positioned against the positioning surface in the length direction, its position in the length direction can be flexibly adjusted according to actual conditions.

[0040] Since the input shaft 7 and the conductor rotor 12 are supported by the support one 10, the output shaft 8, the spline sleeve and the permanent magnet rotor 26 are supported by the support two 13 and the support three 15, and the support two 13 is supported by the air gap adjusting assembly, that is, the embodiment does not adopt the cantilevered installation mode on the side wall of the shell, but is supported by a plurality of support components fixed on the total bottom plate 6, thereby avoiding the problems of large bending moment and easy deformation and cracking of the side wall of the shell in the existing cantilevered installation mode, ensuring the structural stability and facilitating the assembly and disassembly.

[0041] In some examples, the spline sleeve is a ball spline sleeve 27. The permanent magnet eddy current speed regulator further comprises a telescopic sleeve 14 located between the support two 13 and the support three 15 and sleeved outside the output shaft 8. The two ends of the telescopic sleeve 14 are connected with the support two 13 and the support three 15 respectively.

[0042] The friction between the ball spline sleeve 27 and the output shaft 8 is not the sliding friction between the ordinary spline shaft and the ordinary spline sleeve, but the rolling friction, and the ball is arranged between the two, which rolls in the ball spline groove (i.e. the raceway) on the output shaft 8, so as to avoid the jerk phenomenon caused by sliding friction, especially the sliding friction caused by rust.

[0043] The connection of the two ends of the telescopic sleeve 14 can mean abutting, at this time the telescopic sleeve 14 has axial elasticity, and only needs to keep a distance between the telescopic sleeve 14 and the output shaft 8 through radial limiting. The connection of the two ends of the telescopic sleeve 14 can also mean fixed connection, for example, the two ends of the telescopic sleeve 14 are fixedly connected with the bearing seat two and the bearing seat three through screws, so as to ensure that the telescopic sleeve 14 and the bearing seat two and the telescopic sleeve 14 and the bearing seat three are not separated.

[0044] For example, the telescopic sleeve 14 can be an organ cover, a corrugated pipe or other structure capable of axial telescoping.

[0045] When the air gap adjusting assembly drives the bearing seat two to slide in the direction parallel to the input shaft 7 (i.e. parallel to the output shaft 8), with the change of the distance between the bearing seat two and the bearing seat three, the telescopic sleeve 14 is correspondingly telescoped in the axial direction, so that the two ends of the telescopic sleeve 14 are always connected with the bearing seat two and the bearing seat three, the part of the output shaft 8 between the bearing seat two and the bearing seat three is covered inside, and the sealing effect is achieved, so as to avoid the external moisture and impurities falling on the output shaft 8, ensure the smoothness of the output shaft 8, avoid rust, and further improve the smoothness of the sliding process of the ball spline sleeve 27.

[0046] In some examples, the support 1 includes a bearing 1 and a bearing seat 1. The outer ring of the bearing 1 is matched with the bearing seat 1, and the inner ring of the bearing 1 is matched with the input shaft 7. The support 2 13 includes a bearing 2 and a bearing seat 2. The outer ring of the bearing 2 is matched with the bearing seat 2, and the inner ring of the bearing 2 is matched with the spline sleeve. The support 3 15 includes a bearing 3 and a bearing seat 3. The outer ring of the bearing 3 is matched with the bearing seat 3, and the inner ring of the bearing 3 is matched with the output shaft 8.

[0047] In some examples, the air gap adjusting assembly is a lead screw module 16, which includes a lead screw and a sliding block matched with the lead screw in threads. The sliding block is fixedly connected with the bearing seat 2.

[0048] By controlling the number of rotations of the lead screw, the moving distance of the sliding block, the bearing seat 2 and the permanent magnet rotor 26 can be controlled, and the air gap can be accurately adjusted. The lead screw can be a ball screw or a sliding screw. When the lead screw rotates, the sliding block slides along the guide rail of the lead screw module 16, so that the sliding block only translates and does not rotate, and thus the posture of the bearing seat 2 remains stable during movement.

[0049] The driving motor 9 of the lead screw module 16 is fixed in the groove 3, and the bottom of the groove away from the end of the groove 2 is preferably provided with a motor groove for sinking installation of the driving motor 9 of the lead screw module 16 to avoid the structure above.

[0050] However, the actual implementation is not limited thereto. For example, the air gap adjusting assembly can also be a linear hydraulic drive assembly or other structures.

[0051] In some examples, the lead screw is drivingly connected with the hand wheel 11 by means of belt transmission, so as to drive the lead screw to rotate in a manual manner.

[0052] For example, a belt pulley 1 is fixed on the lead screw, a belt pulley 2 is fixed on the hand wheel 11, and the belt pulley 1 and the belt pulley 2 are drivingly connected through a transmission belt 17. The hand wheel 11 is rotatably installed on a hand wheel 11 support, and the hand wheel 11 support is fixed on the total base plate 6.

[0053] In some examples, the permanent magnet eddy current speed regulation system further includes a position sensor 31, a speed sensor 29 and a temperature sensor. The position sensor 31 is stationary relative to the bearing seat 3 and is used to monitor the position of the bearing seat 2. The speed sensor 29 is used to monitor the rotational speed of the output shaft 8. The temperature sensor includes a temperature sensor 1 18 and a temperature sensor 3 30. The temperature sensor 1 18 is fixedly connected with the bearing seat 1 and is used to monitor the temperature of the outer ring of the bearing 1. The temperature sensor 3 30 is fixedly connected with the bearing seat 3 and is used to monitor the temperature of the outer ring of the bearing 3.

[0054] The position sensor 31 can be fixed on the bearing seat 3 or on the total base plate 6.

[0055] The speed sensor 29 can be a Hall sensor, and the magnetic ring of the Hall sensor can be fixed on the section of the output shaft 8 not covered by the telescopic sleeve 14. Alternatively, the speed sensor 29 can be an optical sensor, and the reflective sheet of the optical sensor can be fixed on the section of the output shaft 8 not covered by the telescopic sleeve 14.

[0056] When the temperature shown by the temperature sensor is higher than the warning temperature, the operation of the permanent magnet eddy current speed regulator is stopped, and whether the bearing one, the bearing three and other bearings need to be added with lubricant is checked.

[0057] The temperature sensor can directly display the temperature, or the temperature sensor can be electrically connected with the control unit, and the warning temperature is preset in the control unit. When the control unit determines that the actual temperature is greater than the warning temperature, the buzzer, warning light and the like electrically connected with the control unit are controlled to send a warning signal.

[0058] In some examples, the bearing seat one, the bearing seat two and the bearing seat three each include a reinforcing rib, and a bearing mounting cylinder, a vertical plate and a bottom plate fixedly connected in sequence from top to bottom. The vertical plate is perpendicular to the input shaft 7, and has two legs, and the airflow channel is between the two legs. The number of reinforcing ribs is multiple and located on both sides of the airflow channel. The reinforcing ribs are fixedly connected with the bearing mounting cylinder, the vertical plate and the bottom plate respectively, and are perpendicular to the vertical plate and the bottom plate.

[0059] The airflow channel is directly below the input shaft 7 or the output shaft 8, and a through hole (a dust screen can be arranged at the position of the through hole) is arranged at the position of the protective cover 4 corresponding to the airflow channel, so that the airflow flows into and out of the shell along the direction parallel to the input shaft 7 (i.e. along the length direction of the total bottom plate 6) on the upper surface of the total bottom plate 6, and air cooling is realized.

[0060] The ball screw module 16 passes through the lower part of the gas channel of the bearing seat two and the bearing seat three, and the upper part of the corresponding gas channel can be used for airflow flow.

[0061] In some examples, a plurality of blades for making the airflow flow along the axial direction of the input shaft 7 are fixed on the conductor rotor 12, and the volute 5 is arranged at the area of the protective cover 4 outside the conductor rotor 12.

[0062] The airflow flowing along the connection direction of the plurality of airflow channels is generated by the power of the rotation of the conductor rotor 12, and is not dependent on external natural wind, and good heat dissipation effect can still be maintained in the indoor windless environment.

[0063] The volute 5 has a spiral air inlet channel structure, and an air inlet (a dust screen can be arranged at the position of the air inlet) is additionally provided. The air inlet is generally arranged on the side wall of the protective cover 4, and in combination with the spiral structure, rainwater can be avoided from entering.

[0064] In some examples, two legs of the upright plate of the bearing seat one and the bearing seat three are each connected with a bottom plate to form a space between the two bottom plates for avoiding air gap adjustment assembly.

[0065] In some examples, the bearing one includes a deep groove ball bearing one 22 and a cylindrical roller bearing one 24, the deep groove ball bearing one 22 and the cylindrical roller bearing one 24 have a gap, the deep groove ball bearing one 22 is located on a side of the cylindrical roller bearing one 24 away from the support two 13. The bearing two includes two deep groove ball bearings two, the two deep groove ball bearings two abut. The bearing three includes a deep groove ball bearing three. The upright plate of the bearing seat one is two and has a gap. The upright plate of the bearing seat two and the upright plate of the bearing seat three is one.

[0066] The setting position of the upright plate can be calculated according to the actual weight distribution to obtain greater rigidity.

[0067] For example, the two upright plates of the support one 10 are coplanar with the center surface of the deep groove ball bearing one 22 and the center surface of the cylindrical roller bearing one 24 respectively, and one upright plate of the support two 13 is coplanar with the reaction force points of the two parallel deep groove ball bearings two. The center surface of the upright plate of the support three 15 is coplanar with the center surface of the cylindrical roller bearing three.

[0068] The setting of the cylindrical roller bearing one 24 and the two upright plates can make the support one 10 bear greater bending moment and improve its structural stability.

[0069] Since the permanent magnet eddy current governor is a cylindrical governor rather than a disc governor, its axial force can be ignored, so the bearing one, the bearing two and the bearing three do not need to use angular contact ball bearings and tapered roller bearings.

[0070] Since the output shaft 8 is supported by the support two 13 and the support three 15, its main weight is distributed on the end where the permanent magnet rotor 26 is located, so the bearing two uses two deep groove ball bearings two to improve the carrying capacity, and the bearing three only needs to use one deep groove ball bearing.

[0071] In some examples, the support one 10 further includes a left end cover one 20, a right end cover one 19, a nut one 21, a sleeve one 23, the support two 13 further includes a left end cover two, a right end cover two, a nut two, and the support three 15 further includes a left end cover three, a right end cover three and a nut three.

[0072] For example, the provided perspective is as follows: Fig. 3 The provided perspective is as follows:

[0073] The left end of the outer ring of the deep groove ball bearing one 22 abuts against the left end cover one 20, and the right end of the outer ring of the deep groove ball bearing one 22 abuts against the stepped structure of the bearing seat one. The left end of the inner ring of the deep groove ball bearing one 22 abuts against the nut one 21, and the right end of the inner ring of the deep groove ball bearing one 22 abuts against the sleeve one 23. The left end of the outer ring of the cylindrical roller bearing one 24 abuts against the stepped structure of the bearing seat one, and the right end of the outer ring of the cylindrical roller bearing one 24 abuts against the right end cover one 19. The left end of the inner ring of the cylindrical roller bearing one 24 abuts against the sleeve one 23, and the right end of the inner ring of the cylindrical roller bearing one 24 abuts against the right end cover one 19. The sleeve one 23 is sleeved on the input shaft 7, and the nut one 21 is threadedly connected to the input shaft 7. The nut one 21 is not a common nut, but a round nut specially used for fastening bearings.

[0074] The left end of the outer ring of the left deep groove ball bearing two abuts against the left end cover two with a small gap therebetween to avoid the two parallel deep groove ball bearings two from being stuck, and the left end of the inner ring of the left deep groove ball bearing two abuts against the stepped structure of the ball spline sleeve 27. The right end of the outer ring of the right deep groove ball bearing two abuts against the stepped structure of the bearing seat two, and the right end of the inner ring of the right deep groove ball bearing two abuts against the nut two. The nut two is threadedly connected to the ball spline sleeve 27.

[0075] The left end of the outer ring of the deep groove ball bearing three abuts against the left end cover three with a small gap therebetween to avoid the deep groove ball bearing three from being stuck, and the right end of the outer ring of the deep groove ball bearing three abuts against the stepped structure of the bearing seat three. The left end of the inner ring of the deep groove ball bearing three abuts against the stepped structure of the output shaft 8, and the right end of the inner ring of the deep groove ball bearing three abuts against the nut three. The nut three is threadedly connected to the output shaft 8.

[0076] For example, the left end cover one 20, the right end cover one 19, the left end cover two, the right end cover two, the left end cover three and the right end cover three are provided with holes for adding lubricant, so that the lubricant can be directly added without disassembly.

[0077] In some examples, the inner wall of the protective cover 4 is attached with soundproof cotton to absorb noise and further improve the noise reduction effect.

[0078] In some examples, the lifting eye screw 3 is fixed on the total base plate 6, and a hole with a diameter larger than the nominal diameter of the lifting eye screw 3 is reserved on the base 1 to avoid interference between the lifting eye screw 3 and the base 1. When in use, the hook of the lifting device is hung on the lifting eye of the lifting eye screw 3, and then the permanent magnet eddy current speed regulation system can be hoisted to the designated position, and then the base 1 can be fixed at the designated position by using anchor bolts.

[0079] In some examples, the two ends in the length direction and the two ends in the width direction of the base 1 are fixed with adjusting blocks 2, and the adjusting blocks 2 are internally threaded. By screwing the adjusting rod with the adjusting blocks 2, rotating the adjusting rod can push the total base plate 6 to slide on the base 1, and adjust the relative position of the total base plate 6 and the base 1.

[0080] In some examples, a connecting sleeve 25 is sleeved on the input shaft 7, the input shaft 7 is keyed with the connecting sleeve 25 and fastened with a locking screw, and the connecting sleeve 25 is screwed with the conductor rotor 12. Fig. 3 Provided as an example of the viewing angle, the left end of the connecting sleeve 25 abuts against the shaft shoulder of the input shaft 7, and the right end of the connecting sleeve 25 approximately abuts against the input shaft end limiting plate 32 (but with a certain gap), and the axial positioning is realized by the locking screw. The input shaft end limiting plate 32 is bolted on the end of the input shaft 7 close to the permanent magnet rotor 26.

[0081] In some examples, the output shaft 8 is bolted with an output shaft end limiting plate 28 close to the conductor rotor 12. The output shaft end limiting plate 28 is used to limit the sliding range of the ball spline sleeve 27, so as to avoid the ball spline sleeve 27 from slipping off the output shaft 8.

[0082] The height adjustment and the levelness adjustment of the permanent magnet eddy current speed regulator can be adjusted by the way of padding shims between the base 1 and the total base plate 6, or by the way of padding shims between the total base plate 6 and the support one 10, the support three 15 and the lead screw module 16 above the total base plate 6.

[0083] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used to help understand the method of the present application and its core idea; meanwhile, for the general skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed. In conclusion, the content of the present specification should not be understood as the limitation of the present application.

Claims

1. A permanent magnet flux modulation speed control system, characterized by, include: The outer casing includes the base and protective cover; The permanent magnet eddy current speed controller is a cylindrical speed controller, comprising a base plate, bracket one, bracket two, bracket three, input shaft, conductor rotor, spline sleeve, output shaft, permanent magnet rotor, and air gap adjustment assembly. The base plate is fixedly connected to the base and the protective cover. The upper surface of the base plate has a positioning groove of equal depth extending from one end to the other. The positioning groove is "I"-shaped and includes groove one, groove two, and groove three connected in sequence. Bracket one is fixed in groove one and positioned in contact with one corner of groove one. The air gap adjustment assembly is fixed in groove two and positioned in contact with one side wall of groove two. Bracket three is fixed in groove three and positioned in contact with one corner of groove three. The input shaft is rotatably mounted on bracket one, and the conductor rotor is fixedly connected to the input shaft. The spline sleeve is slidably sleeved on the output shaft and rotatably mounted on bracket two. The output shaft is rotatably mounted on the bracket three and is collinear with the input shaft; the air gap adjustment assembly is fixedly connected to the bracket two and is used to drive the bracket two to slide in a direction parallel to the input shaft.

2. The permanent magnet flux modulation system of claim 1, wherein: The spline sleeve is a ball spline sleeve; the permanent magnet eddy current speed controller also includes a telescopic sleeve, which is located between the second bracket and the third bracket and is sleeved on the outside of the output shaft; the two ends of the telescopic sleeve are respectively connected to the second bracket and the third bracket.

3. The permanent magnet flux modulation system of claim 1, wherein: The first bracket includes a bearing and a bearing housing; the outer ring of the bearing 1 mates with the bearing housing, and the inner ring of the bearing 1 mates with the input shaft; the second bracket includes a bearing 2 and a bearing housing 2; the outer ring of the bearing 2 mates with the bearing housing 2, and the inner ring of the bearing 2 mates with the spline sleeve; the third bracket includes a bearing 3 and a bearing housing 3; the outer ring of the bearing 3 mates with the bearing housing 3, and the inner ring of the bearing 3 mates with the output shaft.

4. The permanent magnet flux modulation system of claim 3, wherein: The air gap adjustment component is a lead screw module, including a lead screw and a slider that is threadedly engaged with the lead screw; the slider is fixedly connected to the bearing housing.

5. The permanent magnet flux modulation system of claim 3, wherein: It also includes a position sensor, a speed sensor, and a temperature sensor; the position sensor is stationary relative to the bearing housing three and is used to monitor the position of the bearing housing two; the speed sensor is used to monitor the rotational speed of the output shaft; there are multiple temperature sensors, which are respectively fixedly connected to the bearing housing one and the bearing housing three and are used to monitor the temperature of the outer rings of the bearing one and the bearing three.

6. The permanent magnet flux modulation system of claim 3, wherein: The bearing housing 1, bearing housing 2, and bearing housing 3 each include reinforcing ribs, and a bearing mounting cylinder, a vertical plate, and a base plate that are fixedly connected from top to bottom. The vertical plate is perpendicular to the input shaft and has two legs, with an airflow channel between the two legs. There are multiple reinforcing ribs located on both sides of the airflow channel. The reinforcing ribs are fixedly connected to the bearing mounting cylinder, the vertical plate, and the base plate, respectively, and are perpendicular to the vertical plate and the base plate.

7. The permanent magnet flux modulation system of claim 6, wherein: Two of the legs of the vertical plate of the bearing seat one and the bearing seat three are respectively connected with a bottom plate to form a space between the two bottom plates for avoiding the air gap adjusting assembly.

8. The permanent magnet eddy current speed control system of claim 6, wherein: The bearing one comprises a deep groove ball bearing one and a cylindrical roller bearing one, the deep groove ball bearing one and the cylindrical roller bearing one have a gap, the deep groove ball bearing one is located on the side of the cylindrical roller bearing one away from the support two; the bearing two comprises two deep groove ball bearings two, the two deep groove ball bearings two abut; the bearing three comprises a deep groove ball bearing three; the vertical plate of the bearing seat one is two and has a gap; the vertical plate of the bearing seat two and the vertical plate of the bearing seat three are one.

9. The permanent magnet flux modulation system of claim 1, wherein: A plurality of blades for making the airflow flow along the axial direction of the input shaft are fixed on the conductor rotor, and a volute is arranged on the area outside the conductor rotor of the protective cover.

10. The permanent magnet flux modulation system of claim 1, wherein: Soundproof cotton is attached to the inner wall of the protective cover.

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