Assembly equipment and control method

Abstract

The present invention provides an assembly device and a control method, which relate to the technical field of bearing assembly. The present invention provides an assembly device for assembling the bearing rotor of a magnetic bearing onto a core shaft, and the assembly device includes: a pressure mechanism, a heating mechanism, and a fixed platform. The bearing rotor is placed on the heating mechanism, and the heating mechanism is used to heat the bearing rotor and expand it due to heat. The fixed platform includes a first fixed component and a cooling component, and the core shaft is placed on the first fixed component, and the cooling component is used to reduce the temperature of the core shaft to room temperature or a temperature below room temperature, so that it will not be affected by the heating mechanism and expand; then the bearing rotor is pressed onto the core shaft by the pressure mechanism, which can avoid manual operation errors, can greatly improve the assembly accuracy and assembly consistency between the bearing rotor and the core shaft, and ensure the reliability of the magnetic bearing. At the same time, it can also simplify the assembly process, make the assembly time controllable, and improve the assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing assembly, and in particular to an assembly device and a control method. Background Art

[0002] Magnetic bearings use magnetic force to suspend the rotor in the air, so that there is no mechanical contact between the rotor and the stator. It is a non-contact support component. Compared with traditional ball bearings, there is no mechanical wear, so the electromagnetic spindle can run at a very high speed. It has the advantages of ultra-low consumption, low noise, maintenance-free, and long service life. It is mostly used in space technology, semiconductor equipment, and robots. Because it is mostly used in high-end equipment, its stability and consistency are required to be high.

[0003] At present, magnetic bearings generally include bearing rotors, bearing stators, and mandrels. Among them, the bearing rotor is sleeved on the mandrel to form an electromagnetic spindle, and the bearing stator is sleeved outside the electromagnetic spindle. When power is turned on, the electromagnetic spindle can be suspended. In order to overcome the centrifugal force caused by high-speed rotation, an interference fit is adopted between the bearing rotor and the mandrel. During the assembly process, in order to achieve an interference fit, the bearing rotor needs to be placed in a heating box and heated to a higher temperature, and the bearing rotor is manually installed on the mandrel through some parts.

[0004] In the above assembly method, in order to avoid heat loss of the bearing rotor during transportation, the bearing rotor needs to be installed on the mandrel as soon as possible after being taken out of the heating box. Therefore, the assembly personnel are required to have high proficiency. Therefore, the performance consistency of the assembled electromagnetic spindle is poor, resulting in uneven quality of magnetic suspension bearing products. In addition, due to the heat loss, the reserved margin for heating temperature will also be large, which will cause a lot of energy loss. Summary of the invention

[0005] (I) The problem to be solved by the present invention is that the existing magnetic bearings are mostly assembled manually, resulting in uneven product quality and high energy consumption during the assembly process.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, an embodiment of the present invention provides an assembly device for assembling a bearing rotor of a magnetic bearing onto a core shaft, wherein the assembly device comprises: a pressure mechanism, a heating mechanism and a fixed platform;

[0008] The bearing rotor is placed on the heating mechanism, and the heating mechanism is used to heat the bearing rotor;

[0009] The fixed platform comprises a first fixed component and a cooling component, the mandrel is placed on the first fixed component and the mandrel points to the heating mechanism, and the cooling component is used to cool the mandrel;

[0010] The pressure mechanism is connected to the heating mechanism and is used for pressing the bearing rotor onto the core shaft.

[0011] According to one embodiment of the present invention, further, the fixed platform includes a base;

[0012] The first fixing component is disposed on the base;

[0013] The cooling component includes a coolant channel disposed in the base, and the coolant channel surrounds the circumference of the first fixing component.

[0014] According to an embodiment of the present invention, further, the mandrel comprises a first end and a second end which are arranged opposite to each other, and along the direction from the first end to the second end, the second end is provided with a fixing portion and a positioning portion in sequence;

[0015] The first fixing assembly includes a positioning caliper and a fixing caliper;

[0016] The positioning portion is connected to the positioning caliper, and the positioning caliper is used to make the core shaft coaxial with the bearing rotor;

[0017] The fixing portion is connected to the fixing caliper.

[0018] According to one embodiment of the present invention, further, the fixed caliper includes a plurality of first jaws arranged at intervals;

[0019] An elastic sheet is disposed on the end surface of the first clamping claw, and a gap is provided between the elastic sheet and the end surface of the first clamping claw.

[0020] According to an embodiment of the present invention, further, it includes a controller and a first temperature sensor; the first temperature sensor is connected to the controller;

[0021] The first temperature sensor is disposed in any one of the gaps, and the temperature sensor is used to detect the temperature of the mandrel;

[0022] The controller is also connected to the cooling assembly. The first temperature sensor feeds back the temperature information of the mandrel to the controller. The controller controls the temperature of the cooling assembly according to the temperature information of the mandrel.

[0023] According to an embodiment of the present invention, further, the heating mechanism includes a second fixing component, a protective sleeve and a heating element; the assembly device also includes a second temperature sensor and a controller, and the second temperature sensor and the heating element are connected to the controller;

[0024] The second fixing assembly and the heating element are both disposed in the protective sleeve, and the protective sleeve is connected to the pressure mechanism;

[0025] The bearing rotor is connected to the second fixing assembly, and the heating element is arranged on the peripheral side of the second fixing assembly;

[0026] The second temperature sensor is used to detect the temperature of the bearing rotor and feed back the temperature information of the bearing rotor to the controller. The controller controls the output power of the heating element according to the temperature information of the bearing rotor fed back by the temperature sensor.

[0027] According to one embodiment of the present invention, further, a test piece is included, and the test piece is detachably connected between the core shaft and the bearing rotor, and the test piece is used to test the coaxiality between the core shaft and the bearing rotor.

[0028] According to an embodiment of the present invention, further, the test piece has two oppositely disposed ends;

[0029] The test piece is provided with a test column matched with the bearing rotor at one end, and a test hole matched with the core shaft at the other end, and the test column is coaxially arranged with the test hole;

[0030] The test column is detachably connected to the bearing rotor;

[0031] The testing hole is detachably connected to the core shaft.

[0032] According to an embodiment of the present invention, further, the test column and the bearing rotor are clearance matched, and / or the test hole and the core shaft are clearance matched.

[0033] Another aspect of the present invention is to provide a control method for controlling the assembly equipment described in the above embodiment.

[0034] The control method comprises the following steps:

[0035] Install the mandrel onto the fixed platform;

[0036] The test piece is mounted on the second fixing assembly, and the pressure mechanism is controlled by the controller to push the test piece for trial installation;

[0037] After the test assembly is successful, the bearing rotor is installed on the second fixing assembly;

[0038] The controller controls the heating element to heat the bearing rotor to a set temperature and maintain the temperature, and the controller controls the cooling assembly to cool the mandrel to a set temperature and maintain the temperature;

[0039] The controller controls the pressure mechanism to assemble the bearing rotor onto the core shaft and continuously applies pressure;

[0040] The controller turns off the heating and cooling components;

[0041] When the temperature of the core shaft and the bearing rotor drops to room temperature, the controller controls the pressure mechanism to retract and the assembly is completed.

[0042] Beneficial effects of the present invention:

[0043] The present invention provides an assembly device for assembling a bearing rotor of a magnetic bearing onto a core shaft, and the assembly device includes: a pressure mechanism, a heating mechanism, and a fixed platform. The bearing rotor is placed on the heating mechanism, and the heating mechanism is used to heat the bearing rotor. The fixed platform includes a first fixed component and a cooling component, the core shaft is placed on the first fixed component, and the core shaft points to the heating mechanism, and the cooling component is used to cool the core shaft. The pressure mechanism is connected to the heating mechanism, and is used to press the bearing rotor onto the core shaft.

[0044] In this embodiment, the heating mechanism heats the bearing rotor to cause it to expand; the cooling component lowers the temperature of the core shaft to room temperature or a temperature below room temperature so that it will not be affected by the heating mechanism and expand; and the bearing rotor is pressed onto the core shaft by a pressure mechanism, which can avoid manual operating errors, greatly improve the assembly accuracy and assembly consistency between the bearing rotor and the core shaft, ensure the reliability of the magnetic bearing, and at the same time, simplify the assembly process, make the assembly time controllable, and improve assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A schematic diagram of the overall structure of an assembly device provided by an embodiment of the present invention;

[0047] Figure 2 A partial structural schematic diagram of an assembly device provided in an embodiment of the present invention;

[0048] Figure 3 A schematic diagram of the heating mechanism structure of an assembly device provided in an embodiment of the present invention;

[0049] Figure 4 A schematic diagram of the structure of a fixed platform of an assembly device provided in an embodiment of the present invention;

[0050] Figure 5 for Figure 4 A local enlarged view of point A;

[0051] Figure 6 A cross-sectional view of a base of an assembly device provided by an embodiment of the present invention;

[0052] Figure 7 A cross-sectional view from another perspective of the base of the assembly device provided by the embodiment of the present invention;

[0053] Figure 8 A schematic diagram of the structure of a mandrel provided in an embodiment of the present invention;

[0054] Fig. 9 A schematic diagram of the structure of the test piece provided by the embodiment of the present invention when it is working;

[0055] Fig.10 A cross-sectional view of a test piece provided by an embodiment of the present invention;

[0056] Fig.11 A flow chart of a control method provided by an embodiment of the present invention.

[0057] Icons: 110 - bearing rotor; 120 - spindle; 121 - fixing portion; 122 - positioning portion; 123 - first end; 124 - second end;

[0058] 200-pressure mechanism;

[0059] 300-fixed platform; 310-base; 320-refrigerant channel; 330-positioning caliper; 340-fixed caliper; 341-first claw; 342-gap; 350-elastic sheet;

[0060] 400-heating mechanism; 410-second fixing assembly; 420-protective sleeve; 430-heating element;

[0061] 510-slide bar; 520-mounting platform; 530-pressure platform; 531-self-lubricating bearing;

[0062] 610 - controller; 620 - first temperature sensor; 630 - second temperature sensor;

[0063] 700 - test piece; 710 - test column; 720 - test hole. DETAILED DESCRIPTION

[0064] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0066] It should be noted that in the description of the present invention, the terms "connection" and "installation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or connected through an intermediate medium; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] According to an embodiment of the present invention, an assembly device is provided, such as Figures 1 to 10 As shown, a bearing rotor 110 for a magnetic bearing is assembled onto a core shaft 120 .

[0068] The assembly equipment includes: a pressure mechanism 200 , a heating mechanism 400 and a fixing platform 300 .

[0069] Among them, the pressure mechanism 200 is used to press the bearing rotor 110 into the core shaft 120; the heating mechanism 400 is used to fix the bearing rotor 110 and heat the bearing rotor 110 to a set temperature to facilitate the installation of the bearing rotor 110; the fixed platform 300 is used to fix the core shaft 120 and cool the temperature of the core shaft 120 to a set temperature to facilitate the installation of the bearing rotor 110.

[0070] Specifically, the bearing rotor 110 is placed on the heating mechanism 400, and the heating mechanism 400 is used to heat the bearing rotor 110. The pressure mechanism 200 is connected to the heating mechanism 400, and the pressure mechanism 200 can drive the heating mechanism 400 to move by telescoping, so as to press the bearing rotor 110 onto the core shaft 120.

[0071] The fixing platform 300 includes a first fixing assembly for fixing the mandrel 120. When in use, the mandrel 120 is fixed on the first fixing assembly and directed toward the heating mechanism 400 so that the mandrel 120 is coaxial with the bearing rotor 110. The cooling assembly is used to reduce the temperature of the mandrel 120 to a set temperature.

[0072] The core shaft 120 is coaxial with the bearing rotor 110 , that is, the axis of the core shaft 120 and the axis of the hole of the bearing rotor 110 are on the same straight line.

[0073] Optionally, the temperature of the core shaft 120 can be reduced by heat conduction between the core shaft 120 and the cooling assembly, or by heat radiation.

[0074] In this embodiment, optionally, the bearing rotor 110 includes structures such as laminations and sensors, etc. These are well-known technical means in the art and will not be described in detail here.

[0075] In this embodiment, the heating mechanism 400 heats the bearing rotor 110 to expand it; the cooling assembly lowers the temperature of the mandrel 120 to room temperature or a temperature lower than room temperature, so that it will not expand due to the influence of the heating mechanism 400; and, by pressing the bearing rotor 110 onto the mandrel 120 through the pressure mechanism 200, manual operation errors can be avoided, and the assembly accuracy and assembly consistency between the bearing rotor 110 and the mandrel 120 can be greatly improved, the reliability of the magnetic bearing can be ensured, and the assembly process can be simplified, so that the assembly time can be controlled and the assembly efficiency can be improved. At the same time, the heated bearing rotor 110 is directly pressed onto the mandrel 120, which avoids heat loss during transportation and reduces energy consumption.

[0076] Specifically, in this embodiment, if Figures 4 to 7 As shown, the fixed platform 300 includes a base 310 .

[0077] The first fixing component is disposed on the base 310 .

[0078] The cooling assembly includes a coolant channel 320 disposed in the base 310 . The coolant channel 320 surrounds the circumference of the first fixing assembly to reduce the temperature of the first fixing assembly, thereby reducing the temperature of the core shaft 120 .

[0079] In this embodiment, the first fixing component may be disposed inside the base 310 , and the cooling medium channel 320 surrounds the first fixing component to reduce the temperature of the first fixing component.

[0080] The first fixing component may also be arranged on the surface of the base 310 , and the refrigerant channel 320 surrounds the circumference of the projection of the first fixing component on the base 310 , which can also serve the purpose of reducing the temperature of the first fixing component.

[0081] Of course, no matter which of the above methods is used, the refrigerant channel 320 is used to reduce the temperature of the base 310, and then the temperature of the first fixing component is reduced by heat conduction or heat radiation, so as to reduce the temperature of the core shaft 120.

[0082] In this embodiment, the refrigerant channel 320 is a serpentine pipeline disposed in the base 310 .

[0083] Optionally, the refrigerant channel 320 may also be in a spiral structure.

[0084] It can be understood that, in this embodiment, the cooling component can also be a semiconductor cooling plate or the like disposed in the base 310, which can also achieve the purpose of reducing the temperature of the core shaft 120 in this embodiment.

[0085] In this embodiment, Figure 8 As shown, for ease of description, the core shaft 120 includes a first end 123 and a second end 124 that are oppositely disposed.

[0086] The first end 123 points to the heating mechanism 400 , and the second end 124 is connected to the first fixing component.

[0087] The second end 124 is provided with a positioning portion 122 and a fixing portion 121. The first fixing assembly includes a positioning clamp 330 and a fixing clamp 340. The fixing portion 121 and the positioning portion 122 are sequentially arranged along the direction from the first end 123 to the second end 124. Accordingly, the positioning clamp 330 and the fixing clamp 340 are arranged on the base 310 according to the positions of the positioning portion 122 and the fixing portion 121.

[0088] The positioning portion 122 is connected to the positioning caliper 330 , and the positioning caliper 330 is used to position the core shaft 120 so that the axis of the core shaft 120 is coaxial with the axis of the bearing rotor 110 , ensuring that the bearing rotor 110 can be smoothly pressed into the core shaft 120 during assembly.

[0089] The fixing portion 121 is connected to the fixing caliper 340 , and the fixing portion 121 is used to fix the mandrel 120 to ensure that the mandrel 120 remains stationary during the assembly process, which facilitates the operation of the positioning caliper 330 .

[0090] In actual use, the positioning caliper 330 is a three-jaw caliper, which can automatically align the spindle 120 with the bearing rotor 110 every time without much adjustment, and has high efficiency.

[0091] In an optional embodiment of the present invention, the fixed caliper 340 includes a plurality of first claws 341 arranged at intervals. An elastic sheet 350 is arranged on the end surface of the first claw 341. Figure 5 As shown, a gap 342 is formed between the elastic sheet 350 and the end surface of the first claw 341 .

[0092] The elastic sheet 350 has a certain elasticity and can extend in a direction close to or away from the gap 342. By providing the elastic sheet 350, a pre-tightening force can be provided for the mandrel 120 to tighten the mandrel 120; meanwhile, the positioning function of the positioning caliper 330 will not be affected.

[0093] Optionally, in this embodiment, the end surface of the first claw 341 is an arc-shaped surface, and both ends of the elastic sheet 350 are respectively connected to two sides of the arc-shaped surface to form a gap 342 between the elastic sheet 350 and the end surface.

[0094] It is understandable that the end face of the first claw 341 can also be a face with a certain angle, such as a triangular face, etc. When the two ends of the elastic sheet 350 are connected to the end face of the first claw 341, they can form a gap 342 between the elastic sheet 350 and the end face.

[0095] In an optional embodiment of the present invention, Figure 1 and Figure 5 As shown, the controller 610 and the first temperature sensor 620 are also included. The first temperature sensor 620 is connected to the controller 610 and transmits the detected temperature information to the controller 610.

[0096] In this embodiment, in order to simplify the structure and save costs, the assembly equipment is only provided with the first temperature sensor 620 at one of the gaps 342. The first temperature sensor 620 is used to detect the temperature information of the mandrel 120 in real time and feed the detected temperature information back to the controller 610.

[0097] The controller 610 is also connected to the cooling assembly, and the controller 610 controls the operating temperature of the cooling assembly according to the temperature information fed back by the first temperature sensor 620 .

[0098] Specifically, when the temperature of the core shaft 120 is higher than the set temperature, the controller 610 controls the cooling assembly to increase the flow of the refrigerant in the refrigerant channel 320 , or to reduce the temperature of the refrigerant, so as to reduce the temperature of the core shaft 120 .

[0099] When the temperature of the core shaft 120 is the same as the set temperature, the controller 610 controls the cooling assembly to maintain it.

[0100] When the temperature of the core shaft 120 is lower than the set temperature, the controller 610 controls the cooling assembly to reduce the flow of the refrigerant in the refrigerant channel 320 or reduce the temperature of the refrigerant to save resources.

[0101] In this embodiment, if Figure 3 As shown, the heating mechanism 400 includes a second fixing assembly 410 , a protective sleeve 420 and a heating element 430 .

[0102] The protective sleeve 420 is a cylindrical structure with one end open, and the second fixing component 410 and the heating element 430 are arranged in the protective sleeve 420. The protective sleeve 420 can play a certain role in heat preservation and reduce losses; at the same time, it can also ensure that other components are not affected by high temperature.

[0103] The second fixing assembly 410 is used to fix the bearing rotor 110 , and the heating element 430 is disposed on the circumference of the second fixing assembly 410 to heat the rotor bearing.

[0104] The protective sleeve 420 is connected to the pressure mechanism 200 , and the pressure mechanism 200 can drive the protective sleeve 420 to move and then drive the rotor bearing to move.

[0105] Optionally, in this embodiment, a connecting disk is further included, and the protective cover 420 is disposed on the connecting disk, and the connecting disk is connected to the pressure mechanism 200 .

[0106] Optionally, in this embodiment, the pressure mechanism 200 may be a gas cylinder, an oil cylinder, or the like.

[0107] In an optional implementation of this embodiment, the assembly device further includes a second temperature sensor 630. The second temperature sensor 630 is also connected to the controller 610 and feeds back the detected temperature information to the controller 610.

[0108] The second temperature sensor 630 is used to detect the temperature of the bearing rotor 110 . The heating element 430 is connected to the controller 610 . The controller 610 controls the output power of the heating element 430 according to the temperature information of the bearing rotor 110 fed back by the second temperature sensor 630 .

[0109] In actual use, the second fixing assembly 410 is also a caliper, and the second temperature sensor 630 is disposed on the second claw of the second fixing assembly 410. When the bearing rotor 110 is fixed on the second fixing assembly 410, the second temperature sensor 630 is connected to the bearing rotor 110 and detects the temperature of the bearing rotor 110 in real time.

[0110] In an optional embodiment of the present invention, Fig. 9 and Fig.10As shown, the assembly equipment further includes a test piece 700 for testing the coaxiality between the bearing rotor 110 and the spindle 120. The test piece 700 is detachably connected between the spindle 120 and the bearing rotor 110.

[0111] In this embodiment, before assembling the bearing rotor 110 onto the core shaft 120, the coaxiality between the bearing rotor 110 and the core shaft 120 is first tested using the test piece 700, and the test piece 700 is installed on the core shaft 120, or it is installed on the bearing rotor 110, to avoid a large error between the bearing rotor 110 and the core shaft 120 when assembling the bearing rotor 110, thereby causing the bearing rotor 110 to fail to assemble.

[0112] Optional, such as Fig. 9 and Fig.10 As shown, the bearing rotor 110 is a rod-shaped structure having two opposite ends. A test column 710 is provided at one end of the test piece 700, and a test hole 720 is provided at the other end. The test column 710 is detachably connected to the bearing rotor 110, and the test hole 720 is detachably connected to the core shaft 120.

[0113] When in use, insert the test column 710 into the bearing rotor 110, and then control the pressure mechanism 200 to press down through the controller 610 for trial installation, and observe whether the test hole 720 will be scratched with the mandrel 120. If the mandrel 120 and the test hole 720 are intact, remove the test piece 700 and assemble the bearing rotor 110 onto the mandrel 120. If it is observed that the test hole 720 cannot be installed on the mandrel 120, or there is a scratch between the mandrel 120 and the test hole 720, it is necessary to readjust the position of the bearing rotor 110, and after the adjustment is completed, use the test piece 700 for trial installation until the mandrel 120 and the bearing rotor 110 are intact.

[0114] In this embodiment, by providing the test piece 700 , it is possible to avoid the bearing rotor 110 being offset during installation due to the misalignment between the bearing rotor 110 and the core shaft 120 during assembly of the bearing rotor 110 .

[0115] At the same time, in order to avoid friction between the core shaft 120 and the test piece 700, a gap 342 is used between the core shaft 120 and the test hole 720, but the gap 342 between the core shaft 120 and the test piece 700 needs to be controlled within a smaller range to avoid failure of the bearing rotor 110 installation due to large errors.

[0116] Furthermore, to prevent the test column 710 from being unable to be separated from the bearing rotor 110 , a gap 342 is also provided between the test column 710 and the bearing rotor 110 .

[0117] It is understandable that, in this embodiment, the test piece 700 can also be a part with the same shape as the bearing rotor 110, and the test piece 700 is also provided with a test hole 720. When in use, the test piece 700 is installed on the second fixing assembly 410. The mandrel 120 is installed on the fixing platform 300 and the position of the mandrel 120 is adjusted, and then the pressure mechanism 200 is controlled by the controller 610 to press down for trial assembly. When the trial assembly is successful, the test piece 700 can be removed to start the assembly of the bearing rotor 110. When the trial assembly fails, the position of the mandrel 120 is readjusted for trial assembly until the trial assembly is completed.

[0118] Optionally, in this embodiment, the test piece 700 may also be a telescopic structure. Optionally, the test column 710 and the test hole 720 are located at opposite ends of the test piece 700, and a telescopic sleeve structure is provided between the test hole 720 and the test column 710, or a sleeve structure with a screw and an internal thread provided therein. By using a telescopic method, it is avoided that the pressure mechanism 200 is required to drive the test piece 700 to move downward during the test, which can save resources, save test time, and improve production efficiency.

[0119] In this embodiment, if Figure 1 and Figure 2 As shown, the assembly equipment further includes a pressure platform 530, a mounting platform 520 and a slide bar 510 arranged opposite to each other. One end of the slide bar 510 is connected to the fixed platform 300, and the other end is connected to the mounting platform 520. The pressure platform 530 is arranged on the slide bar 510 and is located between the fixed platform 300 and the mounting platform 520. The pressure mechanism 200 is installed on the mounting platform 520, and the telescopic end of the pressure mechanism 200 passes through the mounting platform 520 and is connected to the pressure platform 530, and drives the pressure platform 530 to slide along the extension direction of the slide bar 510. The heating mechanism 400 is arranged on the side of the pressure platform 530 close to the fixed platform 300.

[0120] In this embodiment, two slide bars 510 are provided to ensure the stability of the pressure platform 530 during movement. The heating mechanism 400 is provided on the pressure platform 530 to prevent the heating mechanism 400 from sliding when moving with the pressure mechanism 200, thereby improving the stability of the bearing rotor 110 during assembly.

[0121] In this embodiment, optionally, two through holes corresponding to the slide bar 510 are provided on the pressure platform 530, the slide bar 510 is connected to the through holes, and a self-lubricating bearing 531 cooperating with the slide bar 510 is provided in the through holes to ensure that the pressure platform 530 can slide smoothly on the slide bar 510.

[0122] In this embodiment, optionally, the controller 610 is also connected to the pressure mechanism 200 and controls the extension and retraction of the pressure mechanism 200 .

[0123] Specifically, when the first temperature sensor 620 detects that the temperature of the core shaft 120 reaches the set temperature, and the second temperature sensor 630 detects that the temperature of the bearing rotor 110 reaches the set temperature, the pressure mechanism 200 pushes the pressure platform 530 to drive the heating mechanism 400 to move in the direction of the fixed platform 300. After the bearing rotor 110 is assembled to the fixed position, the pressure mechanism 200 continues to apply pressure until the second temperature sensor 630 detects that the temperature of the bearing rotor 110 reaches the room temperature, and the controller 610 controls the pressure mechanism 200 to drive the pressure platform 530 and other structures to retract, thereby completing the assembly of the bearing rotor 110.

[0124] Another embodiment of the present invention further provides a control method for controlling the assembly equipment described in the above embodiment.

[0125] like Fig.11 As shown, the control method comprises the following steps:

[0126] Mounting the mandrel 120 on the fixed platform 300;

[0127] The test piece 700 is mounted on the second fixing assembly 410 , and the pressure mechanism 200 is controlled by the controller 610 to push the test piece 700 for trial installation;

[0128] After the test assembly is successful, the bearing rotor 110 is installed on the second fixing assembly 410;

[0129] The controller 610 controls the heating element 430 to heat the bearing rotor 110 to a set temperature and maintain the temperature, and the controller 610 controls the cooling assembly to cool the mandrel 120 to a set temperature and maintain the temperature;

[0130] The controller 610 controls the pressure mechanism 200 to assemble the bearing rotor 110 onto the core shaft 120 and continuously applies a tightening force;

[0131] The controller 610 turns off the heating element 430 and the cooling assembly;

[0132] When the temperature of the core shaft 120 and the temperature of the bearing rotor 110 drop to room temperature, the controller 610 controls the pressure mechanism 200 to retract, and the assembly is completed.

[0133] When in use, first, the operator installs the mandrel 120 on the fixed platform 300. The fixing caliper 340 on the base 310 is connected to the fixing part 121; the positioning caliper 330 on the base 310 is connected to the positioning part 122, and the positioning caliper 330 adjusts the position of the mandrel 120 to ensure that the mandrel 120 can be aligned with the bearing rotor 110. After the mandrel 120 is installed, the test piece 700 is installed on the second fixing assembly 410 on the pressure platform 530, and the second fixing assembly 410 fixes the test piece 700. After that, the operator controls the controller 610 to drive the pressure mechanism 200 to move, and the telescopic end of the pressure mechanism 200 begins to drive the pressure platform 530 to move along the extension direction of the slide bar 510 toward the direction of the fixed platform 300, thereby driving the second fixing assembly 410 on the pressure platform 530 and the test piece 700 installed on the second fixing assembly 410 to move downward, and the test assembly begins. If the trial assembly fails, readjust the positioning caliper 330 and adjust the position of the mandrel 120 until the trial assembly is successful. After the trial assembly is successful, remove the test piece 700 installed on the second fixed assembly 410 and replace it with the bearing rotor 110 that needs to be assembled. After the bearing rotor 110 is assembled to the second fixed assembly 410, the operator sets the assembly temperature of the bearing rotor 110 and the assembly temperature of the mandrel 120 through the controller 610 according to the actual situation. After the setting is completed, the controller 610 controls the cooling assembly and the heating element 430 to start working. When the first temperature sensor 620 feedbacks that the temperature of the mandrel 120 reaches the set temperature, and the second temperature sensor 630 feedbacks that the bearing rotor 110 reaches the set temperature, the controller 610 controls the cooling assembly and the heating element 430 to maintain the temperature, and at the same time controls the pressure mechanism 200 to work, assembles the bearing rotor 110 to the predetermined position on the mandrel 120, and continuously applies pressure. During this period, the first temperature sensor 620 and the second temperature sensor 630 detect the temperature of the core shaft 120 and the temperature of the bearing rotor 110 in real time. When the temperature of the core shaft 120 and the temperature of the bearing rotor 110 cool to room temperature, the controller 610 controls the pressure mechanism 200 to retract and completes the assembly of the bearing rotor 110.

[0134] In this embodiment, room temperature, also called normal temperature, is generally defined as 25 degrees Celsius.

[0135] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembly device for assembling a bearing rotor (110) of a magnetic bearing onto a core shaft (120), characterized in that: The assembly equipment comprises: a pressure mechanism (200), a heating mechanism (400), a fixed platform (300), a controller (610), a first temperature sensor (620), and a second temperature sensor (630); The heating mechanism (400) comprises a second fixing component (410), a protective sleeve (420) and a heating element (430); the second fixing component (410) and the heating element (430) are both arranged in the protective sleeve (420), and the protective sleeve (420) is connected to the pressure mechanism (200); the bearing rotor (110) is connected to the second fixing component (410), and the heating element (430) is arranged on the circumference of the second fixing component (410) and is used to heat the bearing rotor; the second temperature sensor (630) is used to detect the temperature of the bearing rotor (110) and feed back the temperature information of the bearing rotor (110) to the controller (610), and the controller (610) controls the output power of the heating element (430) according to the temperature information of the bearing rotor (110) fed back by the temperature sensor; The mandrel (120) comprises a first end (123) and a second end (124) which are arranged opposite to each other, and the second end (124) is provided with a fixing portion (121) and a positioning portion (122) in sequence along a direction from the first end (123) to the second end (124); the fixing platform (300) comprises a base, a first fixing component and a cooling component, the first fixing component being arranged on the base (310), the mandrel (120) being placed on the first fixing component, and the mandrel (120) pointing toward the heating mechanism (400); the first fixing component comprising a positioning caliper (330) and a fixing caliper (340); the positioning portion (122) is connected to the positioning caliper (330), and the positioning caliper (330) is used to make the mandrel (120) coaxial with the bearing rotor (110); the fixing portion (121) is connected to the fixing caliper (340); the fixing caliper (340) The invention comprises a plurality of first clamping claws (341) arranged at intervals; an elastic sheet (350) is arranged on the end surface of the first clamping claw (341), and a gap (342) is provided between the elastic sheet (350) and the end surface of the first clamping claw (341); the cooling component comprises a refrigerant channel (320) arranged in the base (310), the refrigerant channel (320) surrounds the circumference of the first fixing component and is used to cool the core shaft (120); the first temperature sensor (620) is arranged in any one of the gaps (342), and the temperature sensor is used to detect the temperature of the core shaft (120); the controller (610) is also connected to the cooling component, and the first temperature sensor (620) feeds back the temperature information of the core shaft (120) to the controller (610), and the controller (610) controls the temperature of the cooling component according to the temperature information of the core shaft (120); When the first temperature sensor (620) detects that the temperature of the core shaft (120) reaches a set temperature, and the second temperature sensor (630) detects that the temperature of the bearing rotor (110) reaches a set temperature, the pressure mechanism (200) drives the heating mechanism (400) to move in the direction of the fixed platform (300) to press the bearing rotor (110) onto the core shaft (120).

2. The assembly equipment according to claim 1, characterized in that Also included is a test piece (700), the test piece (700) being detachably connected between the core shaft (120) and the bearing rotor (110), the test piece (700) being used to test the coaxiality between the core shaft (120) and the bearing rotor (110).

3. The assembly equipment according to claim 2, characterized in that: The test piece (700) has two oppositely disposed ends; A test column (710) matched with the bearing rotor (110) is provided at one end of the test piece (700), and a test hole (720) matched with the core shaft (120) is provided at the other end, and the test column (710) and the test hole (720) are coaxially arranged; The test column (710) is detachably connected to the bearing rotor (110); The testing hole (720) is detachably connected to the core shaft (120).

4. The assembly equipment according to claim 3, characterized in that The test column (710) cooperates with the gap (342) of the bearing rotor (110), and / or the test hole (720) cooperates with the gap (342) of the core shaft (120).

5. A control method, characterized in that: Used to control the assembly equipment according to any one of claims 1 to 4; The control method comprises the following steps: Install the mandrel onto the fixed platform; The test piece is mounted on the second fixing assembly, and the pressure mechanism is controlled by the controller to push the test piece for trial installation; After the test assembly is successful, the bearing rotor is installed on the second fixing assembly; The controller controls the heating element to heat the bearing rotor to a set temperature and maintain the temperature, and the controller controls the cooling assembly to cool the mandrel to a set temperature and maintain the temperature; The controller controls the pressure mechanism to assemble the bearing rotor onto the core shaft and continuously applies pressure; The controller turns off the heating and cooling components; When the temperature of the core shaft and the bearing rotor drops to room temperature, the controller controls the pressure mechanism to retract and the assembly is completed.

Images