Method for assembling and separating stator and rotor of moment motor for inertial measurement unit

Abstract

The application provides an assembling and separating method for a stator and a rotor of an inertial measurement unit torque motor; the assembling and separating tool for the stator and the rotor of the inertial measurement unit torque motor is designed, the stator of the inertial measurement unit torque motor is fixedly connected to a stator connecting piece of the tool, the rotor of the inertial measurement unit torque motor is fixedly connected to a rotor fixing plate of the tool, the stator connecting piece connected to a threaded rod is manually rotated, the magnetic attraction force is overcome, the stator of the inertial measurement unit torque motor is lifted or lowered to complete the assembling or separating of the stator and the rotor of the inertial measurement unit torque motor, the damage in the assembling and separating process is reduced, the winding insulation layer damage of the stator, the permanent magnet collapse or demagnetization, and the precise bearing and shaft neck scratch caused by the instantaneous high-speed collision are avoided, the product quality reliability is improved, and the repeatable assembling and separating operation is realized.

Description

Technical Field

[0001] This invention relates to a method for assembling and separating a motor stator and rotor, specifically to a method for assembling and separating a torque motor stator and rotor for inertial navigation systems. Background Technology

[0002] As a core inertial sensor in modern aviation, aerospace, maritime, and land precision navigation, the accuracy and reliability of laser gyroscope inertial navigation devices directly determine the performance of the entire navigation system. The torque motor is a key actuator in laser gyroscope inertial navigation devices, enabling angle control or rate tracking; its performance directly affects the measurement accuracy and stability of the gyroscope inertial navigation system.

[0003] Traditional torque motors consist of two main parts: a rotor made of permanent magnets and a stator with multi-phase windings. In order to obtain high power density and fast response characteristics, the permanent magnets of traditional torque motors generally use high-performance rare-earth permanent magnet materials such as neodymium iron boron. This results in an extremely strong permanent magnet magnetic field between the stator and the rotor. Therefore, during the production and maintenance of laser gyroscope inertial navigation devices, the stator and rotor are very prone to rapidly adhering to each other due to magnetic force during assembly and disassembly, resulting in violent axial collisions. These collisions not only cause damage to the insulation layer of the stator windings, but also cause the permanent magnets of the rotor to break down or demagnetize, seriously affecting the performance, reliability and service life of the torque motor.

[0004] Currently, most methods for assembling and separating the stator and rotor of torque motors rely on the operator's experience and feel, lacking effective buffering and protection mechanisms for the entire process from approach, alignment, bonding to separation. In particular, there is a lack of means to smoothly overcome magnetic adhesion during separation, resulting in a high risk of damage. Therefore, the separation method is difficult to operate, with low assembly efficiency and precision, poor product consistency, and difficulty in ensuring repeatability. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problems of existing technologies lacking an effective buffering and protection mechanism throughout the entire process, as well as means to smoothly overcome magnetic adhesion during separation, which leads to high operational difficulty, low assembly efficiency and precision, high risk of damage, poor product consistency, and difficulty in ensuring repeatability. The invention provides a method for assembling and separating the stator and rotor of an inertial torque motor.

[0006] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0007] A method for assembling the stator and rotor of an inertial navigation system (INS) torque motor, wherein a mounting base is provided on the outer circumference of one end of the stator, and the mounting base has a plurality of mounting holes evenly spaced for connecting to the INS frame; a connecting ring is provided on the inner circumference of one end of the rotor, and the connecting ring has a plurality of mounting holes evenly spaced for connecting to the shaft of the INS frame; the method is characterized by including the following steps:

[0008] S0. Prepare an assembly and separation fixture for the stator and rotor of an inertial torque motor; the assembly fixture includes a fixture body, a threaded rod, a stator connector and a rotor fixing plate;

[0009] The tooling body includes a top plate and a bottom plate that are positioned opposite each other and arranged in parallel, as well as two side plates that are respectively connected between the left and right ends of the top plate and the bottom plate; the top plate and the two side plates are detachably connected.

[0010] The threaded rod is threaded to the center of the top plate, and one end of the threaded rod extends between the top plate and the bottom plate and is threaded to the stator connector. A drive knob is provided at the other end of the top of the top plate.

[0011] The stator connector is a cylindrical structure with an open bottom. Multiple first rectangular holes are evenly provided on the side wall of the stator connector, and multiple second rectangular holes are evenly provided on the top wall. The first rectangular holes and the second rectangular holes are connected one-to-one to form auxiliary mounting holes. On the lower wall of each first rectangular hole, a connecting hole is provided along the axial direction of the stator connector for corresponding to the mounting hole and of a suitable size.

[0012] The rotor fixing plate is set on the base plate, and a positioning structure for coaxial positioning with the rotor of the inertial torque motor is set at the center of the rotor fixing plate; a plurality of fixing holes of suitable size and corresponding to the positions of the assembly holes are evenly opened on the rotor fixing plate located on the outer periphery of the positioning structure.

[0013] S1. Clean the outer surface, inner hole, and mating end face of the rotor and stator of the inertial torque motor to ensure that there are no contaminants.

[0014] S2. Use the drive knob to control the threaded rod to rise and manually adjust the position of the stator connector so that the stator connector is located at the bottom end of the threaded rod and abuts against the lower surface of the top plate.

[0015] S3. Place the inertial torque motor rotor on the rotor fixing plate, and use the positioning structure to position it coaxially so that the two are coaxial. Then, fix the inertial torque motor rotor to the rotor fixing plate by passing the fixing bolt through the assembly hole and the fixing hole.

[0016] S4. By passing the connecting bolts through the connecting holes and the mounting holes, the stator of the inertial group torque motor is fixedly connected to the stator connector. The threaded rod is lowered by using the drive knob, and the position of the stator connector is manually controlled to remain unchanged so that it is in contact with the lower surface of the top plate.

[0017] S5. Manually rotate the stator connector to drive the stator of the inertial torque motor connected to the stator connector to gradually descend and slide onto the outer circumference of the inertial torque motor rotor until the two reach the axial engagement position. At this time, air gap magnetic field coupling is realized between the stator of the inertial torque motor and the rotor of the inertial torque motor.

[0018] S6. Remove all fixing bolts and connecting bolts to complete the assembly between the stator and rotor of the inertial torque motor.

[0019] Further, in step S0, the positioning structure is a positioning through hole opened in the center of the rotor fixing plate. The positioning through hole is adapted to the size of the inner hole of the connecting ring of the inertial torque motor rotor, and the positioning through hole is coaxially arranged with the stator connecting member.

[0020] Alternatively, the positioning structure is a positioning boss located at the center of the rotor fixing plate. The positioning boss is adapted to the size of the inner hole of the connecting ring of the inertial torque motor rotor, and the positioning boss is coaxial with the stator connector.

[0021] Furthermore, in step S0, a slot is provided on the top of the drive knob, and the drive knob is rotated by a corresponding screwdriver;

[0022] The rotor fixing plate is an integral circular plate set on the base plate, and the positioning structure is set at the center of the circular plate.

[0023] The tops of the two side plates extend inward to form a pair of connecting ears, and the two ends of the top plate are connected to the pair of connecting ears by mounting bolts to achieve a detachable connection between the two side plates and the top plate.

[0024] Furthermore, step S4 specifically includes:

[0025] S4.1. Using connecting bolts passed through the connecting holes on the stator connector and the mounting holes of the inertia torque motor stator, the inertia torque motor stator is pre-tightened onto the stator connector using a torque wrench.

[0026] S4.2. Using a torque wrench, tighten all the connecting bolts in a diagonal alternation and incremental manner to the specified torque, so that the stator of the inertial navigation torque motor is fixedly connected to the stator connector.

[0027] S4.3 Use the drive knob to control the threaded rod to descend to the lowest position, and manually control the stator connector to keep it in contact with the lower surface of the top plate, so that the stator connector is at the highest point of the lifting stroke.

[0028] Furthermore, step S5 specifically includes:

[0029] S5.1 Manually rotate the stator connector to gradually lower the stator of the inertia torque motor connected to the stator connector;

[0030] S5.2 When the distance between the stator and rotor of the inertial torque motor is shortened to the critical magnetic adsorption distance, continue to manually rotate the stator connector so that the stator overcomes the magnetic adsorption force and continues to descend and slide onto the outer circumference of the rotor until the two reach the axial engagement position. At this time, air gap magnetic field coupling is realized between the stator and rotor of the inertial torque motor.

[0031] Further, step S5.1 specifically involves manually rotating the stator connector at a speed of 1 / 4 revolution per second, thereby causing the stator of the inertia torque motor connected to the stator connector to gradually descend.

[0032] Step S5.2 specifically involves the following steps: When the distance between the stator and rotor of the inertial torque motor is shortened to the critical magnetic adsorption distance, the stator connector is manually rotated at a speed of less than 1 / 4 revolution per second. This causes the stator to overcome the magnetic adsorption force and continue to descend, sliding onto the outer circumference of the rotor until the two reach an axially engaged position. At this point, air gap magnetic field coupling is achieved between the stator and rotor of the inertial torque motor.

[0033] Meanwhile, this invention also provides a method for separating the stator and rotor of an inertial navigation system (INS) torque motor. The INS torque motor stator is coaxially and gap-fitted around the outer circumference of the INS torque motor rotor, and the two are coupled through an air gap magnetic field. A mounting base is provided on the outer circumference of one end of the INS torque motor stator, and the mounting base has multiple mounting holes evenly spaced for connecting the INS frame. A connecting ring is provided on the inner circumference of the end of the INS torque motor rotor away from the mounting base, and the connecting ring has multiple assembly holes evenly spaced for connecting the INS frame shaft. The method is characterized by the following steps:

[0034] S0. Prepare an assembly and separation fixture for the stator and rotor of an inertial torque motor; the assembly fixture includes a fixture body, a threaded rod, a stator connector and a rotor fixing plate;

[0035] The tooling body includes a top plate and a bottom plate that are positioned opposite each other and arranged in parallel, as well as two side plates that are respectively connected between the left and right ends of the top plate and the bottom plate; the top plate and the two side plates are detachably connected.

[0036] The threaded rod is threaded to the center of the top plate, and one end of the threaded rod extends between the top plate and the bottom plate and is threaded to the stator connector. A drive knob is provided at the other end of the top of the top plate.

[0037] The stator connector is a cylindrical structure with an open bottom. Multiple first rectangular holes are evenly provided on the side wall of the stator connector, and multiple second rectangular holes are evenly provided on the top wall. The first rectangular holes and the second rectangular holes are connected one-to-one to form auxiliary mounting holes. On the lower wall of each first rectangular hole, a connecting hole is provided along the axial direction of the stator connector for corresponding to the mounting hole and of a suitable size.

[0038] The rotor fixing plate is set on the base plate. The center of the rotor fixing plate is provided with a positioning structure for coaxial positioning with the rotor of the inertial torque motor. On the rotor fixing plate located on the outer periphery of the positioning structure, a plurality of fixing holes are evenly opened, which correspond to the positions of the assembly holes and are adapted in size.

[0039] S1. Use the drive knob to control the threaded rod to rise and manually adjust the position of the stator connector so that the distance between the threaded rod and the stator connector and the rotor fixing plate is greater than the axial thickness of the stator and rotor of the inertial torque motor.

[0040] S2. Place the stator and rotor of the inertial torque motor, which are coaxially spaced together, on the rotor fixing plate. At the same time, use the positioning structure to perform coaxial positioning so that the rotor of the inertial torque motor and the rotor fixing plate are coaxial. Fix the rotor of the inertial torque motor to the rotor fixing plate by passing the fixing bolts through the assembly holes and fixing holes.

[0041] S3. Use the drive knob to control the threaded rod to descend and manually adjust the position of the stator connector so that the stator connector contacts the mounting base of the inertial torque motor stator. Then, use connecting bolts to pass through the connecting hole and the mounting hole to fix the inertial torque motor stator onto the stator connector.

[0042] S4. Manually rotate the stator connector to overcome the magnetic attraction between the stator of the inertial torque motor and the rotor of the inertial torque motor, and drive the stator of the inertial torque motor connected to the stator connector to gradually rise until the stator of the inertial torque motor and the rotor of the inertial torque motor are completely separated.

[0043] S5. Remove all fixing bolts and connecting bolts to complete the separation between the stator and rotor of the inertial torque motor.

[0044] Further, in step S0, the positioning structure is a positioning through hole opened in the center of the rotor fixing plate. The positioning through hole is adapted to the size of the inner hole of the connecting ring of the inertial torque motor rotor, and the positioning through hole is coaxially arranged with the stator connecting member.

[0045] Alternatively, the positioning structure is a positioning boss located at the center of the rotor fixing plate. The positioning boss is adapted to the size of the inner hole of the connecting ring of the inertial torque motor rotor, and the positioning boss is coaxial with the stator connector.

[0046] Furthermore, in step S0, a slot is provided on the top of the drive knob, and the drive knob is rotated by a corresponding screwdriver;

[0047] The rotor fixing plate is an integral circular plate set on the base plate, and the positioning structure is set at the center of the circular plate.

[0048] The tops of the two side plates extend inward to form a pair of connecting ears, and the two ends of the top plate are connected to the pair of connecting ears by mounting bolts to achieve a detachable connection between the two side plates and the top plate.

[0049] Furthermore, step S4 specifically includes:

[0050] S4.1 Manually rotate the stator connector so that the stator of the inertial torque motor overcomes the magnetic attraction force between itself and the rotor of the inertial torque motor, and drives the stator of the inertial torque motor connected to the stator connector to gradually rise.

[0051] S4.2 When the distance between the stator and the rotor of the inertial torque motor exceeds the critical magnetic adsorption distance, continue to manually rotate the stator connector so that the stator of the inertial torque motor continues to rise until the stator and the rotor of the inertial torque motor are completely separated.

[0052] Compared with the prior art, the present invention has the following beneficial technical effects:

[0053] (1) The present invention provides a method for assembling the stator and rotor of a torque motor. It is designed with a tooling for assembling and separating the stator and rotor of an inertial torque motor, including a top plate and a bottom plate that are opposite to each other and parallel. A threaded rod is provided on the top plate, and a stator connector is threaded on the threaded rod to connect and fix the stator of the inertial torque motor. The rotor fixing plate is set on the bottom plate parallel to the top plate to install the rotor of the inertial torque motor. By manually rotating the stator connector, the stator of the inertial torque motor is driven to descend, thereby completing the assembly of the stator and rotor of the inertial torque motor. The method is simple to operate, can smoothly overcome magnetic adsorption force, can reduce damage during the assembly process, significantly improve product quality and reliability, and achieve high precision, high efficiency and repeatable separation operation. It ensures that the stator and rotor of the inertial torque motor are assembled in a state of axial overlap. The concentricity of the assembly can be stably controlled above 0.02mm after testing.

[0054] (2) The present invention provides a method for separating the stator and rotor of a torque motor. It is designed with a tooling for assembling and separating the stator and rotor of an inertial torque motor, including a top plate and a bottom plate that are opposite to each other and parallel. A threaded rod is provided on the top plate, and a stator connector is threaded on the threaded rod to connect and fix the stator of the inertial torque motor. The rotor fixing plate is set on the bottom plate parallel to the top plate to install the rotor of the inertial torque motor. The stator is driven to rise by manually rotating the stator connector to complete the separation of the stator and rotor of the inertial torque motor. The method is simple to operate, can smoothly overcome the magnetic adsorption force, can reduce the damage during the separation process, and effectively prevent the hidden or obvious secondary damage to the stator and rotor caused by rough separation during maintenance and debugging.

[0055] (3) The assembly and separation method of the stator and rotor of the torque motor of the present invention can effectively reduce the operator's reliance on personal experience and skills, and can effectively avoid damage to the winding insulation layer of the stator, the breakage or demagnetization of the permanent magnet, and the scratches on its precision bearings and journals caused by instantaneous high-speed collisions. The product defect rate caused by the assembly and separation process is reduced to almost zero, and the assembly and separation efficiency is increased by more than 50% compared with the traditional manual method. The product performance consistency and plasticity are greatly guaranteed. Attached Figure Description

[0056] Figure 1 A schematic diagram of the stator structure of a torque motor for an inertial navigation system;

[0057] Figure 2 A schematic diagram of the rotor of a torque motor for an inertial navigation system;

[0058] Figure 3 This is a schematic diagram of the assembly and disassembly tooling for the stator and rotor of an inertial torque motor according to Embodiments 1 and 2 of the present invention.

[0059] The annotations in the attached figures are explained as follows:

[0060] 01-Stator of torque motor for inertial navigation system, 011-Mounting hole, 02-Rotor of torque motor for inertial navigation system, 021-Assembly hole, 1-Threaded rod, 2-Stator connector, 21-Connecting hole, 3-Rotor fixing plate, 31-Fixing hole, 4-Tooling body, 41-Top plate, 42-Bottom plate, 43-Side plate. Detailed Implementation

[0061] To make the objectives, advantages, and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0062] like Figure 1 and Figure 2 As shown, a conventional inertial navigation system (INS) torque motor stator 01 has a mounting base on its outer circumference at one end, with multiple mounting holes 011 evenly spaced on the mounting base for connecting to the INS frame. An INS torque motor rotor 02 has a connecting ring on its inner circumference at one end, with multiple assembly holes 021 evenly spaced on the connecting ring for connecting to the INS frame shaft. During assembly, the two are coupled via an air gap magnetic field, with the INS torque motor stator 01 coaxially fitted onto the outer circumference of the INS torque motor rotor 02. To prevent the INS torque motor stator 01 and rotor 02 from easily adhering to each other due to magnetic force during assembly and disassembly, resulting in severe axial collisions that could damage the insulation layer of the INS torque motor stator 01 windings, and cause chipping or demagnetization of the permanent magnets in the INS torque motor rotor 02, scratching precision bearings and journals, and severely affecting the performance, reliability, and service life of the torque motor, this embodiment provides a method for assembling and disassembling the INS torque motor stator and rotor.

[0063] Example 1

[0064] This embodiment 1 provides a method for assembling the stator and rotor of an inertial navigation torque motor, including the following steps:

[0065] S0. Prepare an assembly and disassembly fixture for the stator and rotor of an inertial navigation torque motor, such as... Figure 3 As shown; the assembly fixture includes a fixture body 4, a threaded rod 1, a stator connector 2, and a rotor fixing plate 3;

[0066] The fixture body 4 includes a top plate 41 and a bottom plate 42 arranged opposite to each other and parallel to each other, and two side plates 43 respectively connected between the left and right ends of the top plate and the bottom plate; the top of the two side plates 43 extends inward to form a pair of connecting ears, and the two ends of the top plate 41 are detachably connected to the pair of connecting ears by mounting bolts; a threaded rod 1 is threaded to the center of the top plate 41, and one end of the threaded rod 1 extends between the top plate 41 and the bottom plate 42 and is threaded to the stator connector 2; a drive knob is provided at the other end of the top of the top plate 41, and a slotted groove is provided on the top of the drive knob, which is rotated by a corresponding screwdriver; the stator connector 2 is a cylindrical structure with an open bottom end, and multiple first-order screws are evenly opened on the side wall of the stator connector 2. A first rectangular hole has multiple second rectangular holes evenly distributed on its top wall, and the first rectangular hole and the second rectangular hole are connected one-to-one to form an auxiliary mounting hole; on the lower wall of each first rectangular hole, a connecting hole 21 is provided along the axial direction of the stator connector 2, which corresponds to the position and size of the mounting hole 011 on the stator 01 of the inertial torque motor; the rotor fixing plate 3 is a circular plate integrally set on the base plate 42, and a positioning through hole is provided in the center of the rotor fixing plate 3. The positioning through hole is adapted to the size of the inner hole of the connecting ring of the rotor 02 of the inertial torque motor and is located on the outer periphery of the positioning through hole. Multiple fixing holes 31 are evenly distributed, which correspond to the position and size of the mounting hole 021 on the rotor 02 of the inertial torque motor; and the positioning through hole is coaxial with the stator connector.

[0067] S1. Use anhydrous ethanol and a high-purity lint-free cloth to clean the outer surface, inner hole and mating end face of the rotor 02 and stator 01 of the inertial torque motor to ensure that there are no oil stains, metal particles and other contaminants.

[0068] S2. Use a screwdriver to rotate the drive knob to control the threaded rod 1 to rise, and manually adjust the position of the stator connector 2 so that the stator connector 2 is located at the bottom end of the threaded rod 1 and abuts against the lower surface of the top plate 41.

[0069] S3. Place the inertial torque motor rotor 02 on the rotor fixing plate 3, and use the positioning through holes for coaxial positioning to ensure that the two are coaxial. Then, pass the fixing bolts through the fixing holes 31 and 021 on the rotor fixing plate 3 and the mounting holes 021 of the inertial torque motor rotor 02. Tighten the fixing bolts of the inertial torque motor rotor 02 according to the specified torque and sequence using a torque wrench to fix the inertial torque motor rotor 02 to the rotor fixing plate 3, ensuring that the inertial torque motor rotor 02 is not loose in the axial and radial directions.

[0070] S4. By passing the connecting bolt through the connecting hole 21 and the mounting hole 011, the stator 01 of the inertial torque motor is fixedly connected to the stator connector 2. The drive knob is rotated with a screwdriver to control the threaded rod 1 to descend. The position of the stator connector 2 is manually kept unchanged so that it remains in contact with the lower surface of the top plate 41.

[0071] S4.1. By passing the connecting bolt through the connecting hole 21 on the stator connector 2 and the mounting hole 011 of the inertial torque motor stator 01, the inertial torque motor stator 01 is pre-tightened to the stator connector 2 using a torque wrench, so that the inertial torque motor stator 01 will not fall off by itself.

[0072] S4.2. Using a torque wrench, tighten all the connecting bolts in a diagonal alternation and incremental manner to the specified torque, so that the stator 01 of the inertial group torque motor is fixedly connected to the stator connector 2.

[0073] S4.3 Use a screwdriver to rotate the drive knob to control the threaded rod 1 to descend to the lowest position, and manually control the stator connector 2 to keep it in contact with the lower surface of the top plate 41, so that the stator connector 2 is at the highest point of the lifting stroke.

[0074] S5. Manually rotate the stator connector 2 to drive the stator 01 of the inertial torque motor connected to the stator connector 2 to gradually descend and slide onto the outer circumference of the rotor 02 of the inertial torque motor until the two reach the axial engagement position. At this time, the air gap magnetic field coupling is realized between the stator (01) of the inertial torque motor and the rotor (02) of the inertial torque motor.

[0075] S5.1 Manually rotate the stator connector 2 at a speed of 1 / 4 revolution per second to drive the stator 01 of the inertia torque motor connected to the stator connector 2 to gradually descend;

[0076] S5.2 When the distance between the stator 01 and the rotor 02 of the inertial torque motor is shortened to the critical magnetic adsorption distance, the magnetic adsorption force is enhanced, which manifests as the rotation of the threaded rod becoming heavier. Therefore, at this time, the stator connector 2 is manually rotated at a speed of less than 1 / 4 revolution per second, so that the stator 01 of the inertial torque motor overcomes the magnetic adsorption force and continues to descend and slides onto the outer circumference of the rotor 02 of the inertial torque motor. When the resistance during rotation suddenly decreases significantly, it indicates that the stator and rotor have reached the axial fit position and achieved complete fit.

[0077] S6. Remove all fixing bolts and connecting bolts to complete the assembly between the stator 01 and the rotor 02 of the inertial torque motor.

[0078] Example 2

[0079] This embodiment 2 provides a method for separating the stator and rotor of an inertial navigation torque motor, including the following steps:

[0080] S0. Prepare an assembly and disassembly fixture for the stator and rotor of an inertial navigation torque motor, such as... Figure 3 As shown; the separation fixture includes a fixture body 4, a threaded rod 1, a stator connector 2, and a rotor fixing plate 3;

[0081] The fixture body 4 includes a top plate 41 and a bottom plate 42 arranged opposite to each other and parallel to each other, and two side plates 43 respectively connected between the left and right ends of the top plate and the bottom plate; the tops of the two side plates 43 extend inward to form a pair of connecting ears, and the two ends of the top plate 41 are detachably connected to the pair of connecting ears by mounting bolts; a threaded rod 1 is threadedly connected to the center of the top plate 41, and one end of the threaded rod 1 extends between the top plate 41 and the bottom plate 42 and is threadedly connected to the stator connector 2; a drive knob is provided at the other end of the top of the top plate 41, and a slot is provided on the top of the drive knob, which is rotated by a corresponding screwdriver; the stator connector 2 is a cylindrical structure with an open bottom end, and multiple slots are evenly distributed on the side wall of the stator connector 2. A first rectangular hole is formed, and multiple second rectangular holes are evenly provided on the top wall. The first rectangular holes and the second rectangular holes are connected one-to-one to form auxiliary mounting holes. On the lower wall of each first rectangular hole, a connecting hole 21 is provided along the axial direction of the stator connector 2. The connecting hole 21 is provided to correspond to the position and size of the mounting hole 011 on the stator 01 of the inertial torque motor. The rotor fixing plate 3 is a circular plate integrally set on the base plate 42. A positioning through hole is provided in the center of the rotor fixing plate 3. The positioning through hole is adapted to the size of the inner hole of the connecting ring of the rotor 02 of the inertial torque motor and is located on the outer periphery of the positioning through hole. Multiple fixing holes 31 are evenly provided to correspond to the position and size of the mounting hole 021 on the rotor 02 of the inertial torque motor. The positioning through hole is coaxial with the stator connector.

[0082] S1. Use the drive knob to control the threaded rod 1 to rise and manually adjust the position of the stator connector 2 so that the distance between the threaded rod 1 and the stator connector 2 and the rotor fixing plate 3 is greater than the axial thickness of the stator 01 and the rotor 02 of the inertial torque motor.

[0083] S2. Place the stator 01 and rotor 02 of the inertial torque motor, which are coaxially fitted together, on the rotor fixing plate 3. At the same time, use the positioning through holes for coaxial positioning to keep the rotor 02 of the inertial torque motor and the rotor fixing plate 3 coaxial. Through the mounting hole 021 and the fixing hole 31, use a torque wrench to tighten the fixing bolts of the rotor according to the specified torque and sequence to fix the rotor 02 of the inertial torque motor on the rotor fixing plate 3.

[0084] S3. Use a screwdriver to rotate the drive knob to control the threaded rod 1 to descend, and manually adjust the position of the stator connector 2 so that the stator connector 2 contacts the mounting base of the inertial torque motor stator 01. Then, pass the connecting bolts through the connecting hole 21 and the mounting hole 011, and use a torque wrench to pre-tighten the inertial torque motor stator 01 onto the stator connector 2. Finally, use a torque wrench to tighten all the connecting bolts in a diagonal alternation, increasing the torque in two or three steps to the specified torque, so that the inertial torque motor stator 01 is fixedly connected to the stator connector 2.

[0085] S4. Manually rotate the stator connector 2 so that the stator 01 of the inertial torque motor overcomes the magnetic attraction force between itself and the rotor 02 of the inertial torque motor, and drives the stator 01 of the inertial torque motor connected to the stator connector 2 to gradually rise until the stator 01 of the inertial torque motor and the rotor 02 of the inertial torque motor are completely separated.

[0086] S4.1 Manually rotate the stator connector 2 so that the stator 01 of the inertial torque motor overcomes the magnetic attraction force between itself and the rotor 02 of the inertial torque motor, and drives the stator 01 of the inertial torque motor connected to the stator connector 2 to gradually rise.

[0087] S4.2 When the distance between the stator 01 and the rotor 02 of the inertial torque motor exceeds the critical magnetic adsorption distance, continue to manually rotate the stator connector 2 so that the stator 01 of the inertial torque motor continues to rise until the stator 01 and the rotor 02 of the inertial torque motor are completely separated.

[0088] S5. Remove all fixing bolts and connecting bolts to complete the separation between the stator 01 and the rotor 02 of the inertial torque motor.

[0089] Based on the above-mentioned assembly and separation method of the stator and rotor of the inertial torque motor, after multiple assembly tests, the concentricity of the assembly can be stably controlled above 0.02mm.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. A method for assembling the stator and rotor of an inertial navigation system (INS) torque motor, wherein a mounting base is provided on the outer circumference of one end of the INS torque motor stator (01), and a plurality of mounting holes (011) for connecting the INS frame are evenly provided on the mounting base; a connecting ring is provided on the inner circumference of one end of the INS torque motor rotor (02), and a plurality of mounting holes (021) for connecting the INS frame shaft are evenly provided on the connecting ring; characterized in that, Includes the following steps: S0. Prepare an assembly and separation fixture for the stator and rotor of an inertial torque motor; the assembly fixture includes a fixture body (4), a threaded rod (1), a stator connector (2), and a rotor fixing plate (3). The tooling body (4) includes a top plate (41) and a bottom plate (42) arranged opposite to each other and parallel to each other, and two side plates (43) respectively connected between the left and right ends of the top plate and the bottom plate; the top plate (41) and the two side plates (43) are detachably connected; The threaded rod (1) is threaded to the center of the top plate (41), and one end of the threaded rod (1) extends between the top plate (41) and the bottom plate (42) and is threaded to the stator connector (2). A drive knob is provided at the other end of the top of the top plate (41). The stator connector (2) is a cylindrical structure with an open bottom. Multiple first rectangular holes are evenly provided on the side wall of the stator connector (2), and multiple second rectangular holes are evenly provided on the top wall. The first rectangular holes and the second rectangular holes are connected one-to-one to form auxiliary mounting holes. On the lower wall of each first rectangular hole, a connecting hole (21) is provided along the axial direction of the stator connector (2) for corresponding to the mounting hole (011) and matching its size. The rotor fixing plate (3) is set on the base plate (42). The center of the rotor fixing plate (3) is provided with a positioning structure for coaxial positioning with the rotor (02) of the inertial torque motor. On the rotor fixing plate (3) located on the outer periphery of the positioning structure, a plurality of fixing holes (31) are evenly opened, which correspond to the position and size of the assembly hole (021). S1. Clean the outer surface, inner hole and mating end face of the rotor (02) and stator (01) of the inertial torque motor to ensure that there are no contaminants. S2. Use the drive knob to control the threaded rod (1) to rise and manually adjust the position of the stator connector (2) so that the stator connector (2) is located at the bottom end of the threaded rod (1) and abuts against the lower surface of the top plate (41). S3. Place the inertial torque motor rotor (02) on the rotor fixing plate (3) and use the positioning structure to position it coaxially so that the two are coaxial. Then, fix the inertial torque motor rotor (02) on the rotor fixing plate (3) by passing the fixing bolt through the assembly hole (021) and the fixing hole (31). S4. By passing the connecting bolt through the connecting hole (21) and the mounting hole (011), the stator (01) of the inertial torque motor is fixedly connected to the stator connector (2), and the threaded rod (1) is lowered by using the drive knob. The position of the stator connector (2) is manually controlled to remain unchanged so that it is in contact with the lower surface of the top plate (41). S5. Manually rotate the stator connector (2) to drive the stator (01) of the inertial torque motor connected on the stator connector (2) to gradually descend and slide onto the outer circumference of the rotor (02) of the inertial torque motor until the two reach the axial engagement position. At this time, the air gap magnetic field coupling is realized between the stator (01) of the inertial torque motor and the rotor (02) of the inertial torque motor. S6. Remove all fixing bolts and connecting bolts to complete the assembly between the stator (01) and the rotor (02) of the inertial torque motor.

2. The assembly method of the stator and rotor of an inertial navigation torque motor according to claim 1, characterized in that: In step S0, the positioning structure is a positioning through hole opened in the center of the rotor fixing plate (3). The positioning through hole is adapted to the size of the inner hole of the connecting ring of the inertial torque motor rotor (02), and the positioning through hole is coaxial with the stator connecting piece (2). Alternatively, the positioning structure is a positioning boss set at the center of the rotor fixing plate (3), the positioning boss is adapted to the size of the inner hole of the connecting ring of the inertial torque motor rotor (02), and the positioning boss is coaxial with the stator connector (2).

3. The assembly method of the stator and rotor of an inertial navigation torque motor according to claim 1, characterized in that: In step S0, a slot is provided on the top of the drive knob, and the drive knob is rotated by a corresponding screwdriver; The rotor fixing plate (3) is a circular plate integrally set on the base plate (42), and the positioning structure is set at the center of the circular plate; The tops of the two side plates (43) extend inward to form a pair of connecting ears, and the two ends of the top plate (41) are connected to the pair of connecting ears by mounting bolts to achieve a detachable connection between the two side plates (43) and the top plate (41).

4. The assembly method of the stator and rotor of an inertial navigation torque motor according to claim 1, characterized in that, Step S4 is as follows: S4.

1. Using connecting bolts passing through the connecting holes (21) on the stator connector (2) and the mounting holes (011) of the inertial torque motor stator (01), the inertial torque motor stator (01) is pre-tightened onto the stator connector (2) using a torque wrench; S4.

2. Use a torque wrench to finally tighten all the connecting bolts in a diagonal alternation and incrementally increasing manner to the specified torque, so that the inertial group torque motor stator (01) is fixedly connected to the stator connector (2); S4.3 Use the drive knob to control the threaded rod (1) to descend to the lowest position, and manually control the stator connector (2) to keep in contact with the lower surface of the top plate (41), so that the stator connector (2) is located at the highest point of the lifting stroke.

5. The assembly method of the stator and rotor of an inertial navigation torque motor according to claim 1, characterized in that, Step S5 is as follows: S5.1 Manually rotate the stator connector (2) to drive the inertia torque motor stator (01) connected to the stator connector (2) to gradually descend; S5.2 When the distance between the stator (01) and the rotor (02) of the inertial torque motor is shortened to the critical magnetic adsorption distance, continue to manually rotate the stator connector (2) so that the stator (01) of the inertial torque motor overcomes the magnetic adsorption force and continues to descend and slides onto the outer circumference of the rotor (02) of the inertial torque motor until the two reach the axial matching position. At this time, the air gap magnetic field coupling is realized between the stator (01) and the rotor (02) of the inertial torque motor.

6. The assembly method of the stator and rotor of an inertial navigation torque motor according to claim 5, characterized in that: Step S5.1 specifically involves manually rotating the stator connector (2) at a speed of 1 / 4 revolution per second, thereby causing the inertia torque motor stator (01) connected to the stator connector (2) to gradually descend. Specifically, step S5.2 involves the following steps: when the distance between the stator (01) and the rotor (02) of the inertial torque motor is shortened to the critical magnetic adsorption distance, the stator connector (2) is manually rotated at a speed of less than 1 / 4 revolution per second, so that the stator (01) of the inertial torque motor overcomes the magnetic adsorption force and continues to descend and slides onto the outer circumference of the rotor (02) of the inertial torque motor until the two reach the axial engagement position. At this time, air gap magnetic field coupling is achieved between the stator (01) and the rotor (02) of the inertial torque motor.

7. A method for separating the stator and rotor of an inertial navigation system (INS) torque motor, wherein the INS torque motor stator (01) is coaxially and gap-fitted onto the outer circumference of the INS torque motor rotor (02), and the two are coupled through an air gap magnetic field; a mounting base is provided on the outer circumference of one end of the INS torque motor stator (01), and a plurality of mounting holes (011) for connecting the INS frame are evenly provided on the mounting base; a connecting ring is provided on the inner circumference of the end of the INS torque motor rotor (02) away from the mounting base, and a plurality of assembly holes (021) for connecting the INS frame shaft are evenly provided on the connecting ring; characterized in that, Includes the following steps: S0. Prepare an assembly and separation fixture for the stator and rotor of an inertial torque motor; the assembly fixture includes a fixture body (4), a threaded rod (1), a stator connector (2), and a rotor fixing plate (3). The tooling body (4) includes a top plate (41) and a bottom plate (42) arranged opposite to each other and parallel to each other, and two side plates (43) respectively connected between the left and right ends of the top plate and the bottom plate; the top plate (41) and the two side plates (43) are detachably connected; The threaded rod (1) is threaded to the center of the top plate (41), and one end of the threaded rod (1) extends between the top plate (41) and the bottom plate (42) and is threaded to the stator connector (2). A drive knob is provided at the other end of the top of the top plate (41). The stator connector (2) is a cylindrical structure with an open bottom. Multiple first rectangular holes are evenly provided on the side wall of the stator connector (2), and multiple second rectangular holes are evenly provided on the top wall. The first rectangular holes and the second rectangular holes are connected one-to-one to form auxiliary mounting holes. On the lower wall of each first rectangular hole, a connecting hole (21) is provided along the axial direction of the stator connector (2) for corresponding to the mounting hole (011) and matching its size. The rotor fixing plate (3) is set on the base plate (42). The center of the rotor fixing plate (3) is provided with a positioning structure for coaxial positioning with the rotor (02) of the inertial torque motor. On the rotor fixing plate (3) located on the outer periphery of the positioning structure, a plurality of fixing holes (31) are evenly opened, which correspond to the position and size of the assembly hole (021). S1. Use the drive knob to control the threaded rod (1) to rise and manually adjust the position of the stator connector (2) so that the distance between the threaded rod (1) and the stator connector (2) and the rotor fixing plate (3) is greater than the axial thickness of the stator (01) and the rotor (02) of the inertial torque motor. S2. The stator (01) and rotor (02) of the inertial torque motor, which are coaxially spaced together, are placed on the rotor fixing plate (3). At the same time, the positioning structure is used for coaxial positioning so that the rotor (02) of the inertial torque motor and the rotor fixing plate (3) remain coaxial. The rotor (02) of the inertial torque motor is fixedly connected to the rotor fixing plate (3) by passing the fixing bolt through the assembly hole (021) and the fixing hole (31). S3. Use the drive knob to control the threaded rod (1) to descend and manually adjust the position of the stator connector (2) so that the stator connector (2) contacts the mounting base of the inertial torque motor stator (01). Then, use the connecting bolts to pass through the connecting hole (21) and the mounting hole (011) to fix the inertial torque motor stator (01) on the stator connector (2). S4. Manually rotate the stator connector (2) so that the stator (01) of the inertial torque motor overcomes the magnetic attraction force between itself and the rotor (02) of the inertial torque motor, and drives the stator (01) of the inertial torque motor connected on the stator connector (2) to gradually rise until the stator (01) of the inertial torque motor and the rotor (02) of the inertial torque motor are completely separated. S5. Remove all fixing bolts and connecting bolts to complete the separation between the stator (01) and the rotor (02) of the inertial torque motor.

8. The method for separating the stator and rotor of an inertial navigation torque motor according to claim 7, characterized in that: In step S0, the positioning structure is a positioning through hole opened in the center of the rotor fixing plate (3). The positioning through hole is adapted to the size of the inner hole of the connecting ring of the inertial torque motor rotor (02), and the positioning through hole is coaxial with the stator connecting piece (2). Alternatively, the positioning structure is a positioning boss set at the center of the rotor fixing plate (3), the positioning boss is adapted to the size of the inner hole of the connecting ring of the inertial torque motor rotor (02), and the positioning boss is coaxial with the stator connector (2).

9. A method for separating the stator and rotor of an inertial navigation torque motor according to claim 7, characterized in that: In step S0, a slot is provided on the top of the drive knob, and the drive knob is rotated by a corresponding screwdriver; The rotor fixing plate (3) is a circular plate integrally set on the base plate (42), and the positioning structure is set at the center of the circular plate; The tops of the two side plates (43) extend inward to form a pair of connecting ears, and the two ends of the top plate (41) are connected to the pair of connecting ears by mounting bolts to achieve a detachable connection between the two side plates (43) and the top plate (41).

10. A method for separating the stator and rotor of an inertial navigation torque motor according to claim 7, characterized in that, Step S4 is as follows: S4.1 Manually rotate the stator connector (2) so that the stator (01) of the inertial torque motor overcomes the magnetic attraction force between itself and the rotor (02) of the inertial torque motor, and drives the stator (01) of the inertial torque motor connected to the stator connector (2) to gradually rise. S4.2 When the distance between the stator (01) and the rotor (02) of the inertial torque motor exceeds the critical magnetic adsorption distance, continue to manually rotate the stator connector (2) so that the stator (01) of the inertial torque motor continues to rise until the stator (01) and the rotor (02) of the inertial torque motor are completely separated.

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