CN210958055U - Permanent magnet synchronous precision grinding electric spindle - Google Patents
Permanent magnet synchronous precision grinding electric spindle Download PDFInfo
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- CN210958055U CN210958055U CN201922442669.7U CN201922442669U CN210958055U CN 210958055 U CN210958055 U CN 210958055U CN 201922442669 U CN201922442669 U CN 201922442669U CN 210958055 U CN210958055 U CN 210958055U
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Abstract
The utility model discloses a synchronous accurate grinding electricity main shaft of permanent magnetism, be provided with stator module in the main part casing, the stator module suit is in the rotor shaft of rotor subassembly, it holds the chamber to be provided with the main shaft coolant liquid between main part casing and the stator module, the one end of main part casing has set gradually preceding bearing assembly and casing front end housing, the other end has set gradually back bearing assembly and casing rear end housing, the bearing installation opposite direction of preceding bearing assembly and back bearing assembly, be provided with vibration sensor on the preceding bearing assembly, be provided with phase place rotational speed sensor subassembly on the casing rear end housing, preceding bearing assembly, be provided with the temperature sensor subassembly on stator module and the back bearing assembly respectively, but back bearing assembly realizes the supply of bearing lubrication medium through axially sliding. The utility model discloses higher conversion efficiency, response speed and machining precision have.
Description
Technical Field
The utility model belongs to the technical field of the processing is equipped, concretely relates to synchronous accurate grinding electricity main shaft of permanent magnetism.
Background
The modern equipment manufacturing industry develops towards the direction of high speed, high efficiency and high precision, particularly under the precise processing scene, the dependence degree of the processing quality of products on the precise processing equipment is higher and higher, and the precision degree of a high-precision electric spindle serving as a core component of numerical control processing equipment becomes important reflection of the manufacturing precision level of the precise numerical control processing equipment. The precise grinding machining is an essential important machining process in the fields of aerospace, high-grade automobile parts, precise medical equipment and the like, and the precise grinding electric spindle is a key part which plays a role in determining the grinding machining precision. However, the existing grinding spindles have the following defects:
1. the traditional grinding main shaft adopts a mechanical main shaft form, the power of a motor is transmitted to the main shaft by using a transmission mechanism to realize grinding, and the introduction of the transmission mechanism in a precise grinding system can cause the reduction of the efficiency of the whole machine, the extension of the response time of the system and the reduction of the processing precision of the whole machine;
2. the spindle rotor and the motor rotor of the existing grinding electric spindle are mostly in a discrete structure, and are assembled into a whole through a matching structure, so that the system integration level is poor, the size is relatively large, and a large amount of matching errors are introduced in the manufacturing process, so that the precision of high-precision grinding equipment is not favorably exerted;
3. the existing grinding electric spindle has high cogging torque and noise, the spindle has poor stability, and the machining precision of the electric spindle is greatly reduced;
4. the existing grinding electric spindle generally cannot realize a performance self-detection function, is not beneficial to real-time detection and diagnosis of the spindle state, and is not in line with the development direction of modern intelligent equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed at, provide a synchronous accurate grinding electricity main shaft of permanent magnetism, solve the problem that current grinding main shaft precision is low, poor stability, noise is high, the integrated level is low.
The utility model adopts the following technical scheme:
the utility model provides a synchronous accurate grinding electricity main shaft of permanent magnetism, including the main part casing, be provided with stator module in the main part casing, stator module suit is in the rotor shaft of rotor subassembly, be provided with main shaft coolant liquid between main part casing and the stator module and hold the chamber, the one end of main part casing has set gradually front bearing subassembly and casing front end housing, the other end has set gradually back bearing subassembly and casing rear end housing, be provided with vibration sensor on the front bearing subassembly, be provided with phase place rotational speed sensor subassembly on the casing rear end housing, front bearing subassembly, be provided with the temperature sensor subassembly on stator module and the back.
Specifically, a first groove is formed in the main body casing, the stator assembly is arranged in the main shaft cooling liquid sealing sleeve, the first groove and the main shaft cooling liquid sealing sleeve form a main shaft cooling liquid accommodating cavity in interference fit, and the main shaft cooling liquid accommodating cavity is connected with a main shaft cooling liquid water inlet channel and a main shaft cooling liquid water outlet channel.
Furthermore, a second groove and a third groove are respectively arranged on two sides of the first groove, and two ends of the main shaft cooling liquid sealing sleeve are matched with sealing rings arranged in the second groove and the third groove; the main shaft cooling liquid water inlet channel, the main shaft cooling liquid water outlet channel and the motor lead channel are distributed and arranged along the radial direction of the main body shell at corresponding included angles.
Specifically, the front bearing assembly comprises a front bearing shell, the front bearing shell is fixed at the front end of the main body shell, and a gap is formed between the end surface of the front bearing shell and the stator assembly; the front bearing assembly is sequentially provided with a first front bearing and a second front bearing, the vibration sensor is attached to an outer ring of the first front bearing, and a first temperature sensor is arranged at the position, close to the center of the front end face of the main shaft, of the first front bearing.
Furthermore, a second front bearing is close to the rear end face of the main shaft and is fixedly installed and positioned with a bearing of the front bearing shell, and a front liquid guiding ring is installed between the first front bearing and the second front bearing.
Specifically, the rear bearing assembly comprises a first rear bearing and a second rear bearing, the first rear bearing is close to the front end face of the main shaft, the bearing outer ring of the first rear bearing is fixedly installed with the sliding bearing seat, the second rear bearing is close to the rear end face of the main shaft and is fixedly installed and positioned with the bearing of the sliding bearing seat, a rear liquid guide ring is installed between the first rear bearing and the second rear bearing, and a sliding seat sleeve is arranged between the main machine shell and the sliding bearing seat.
Furthermore, a plurality of third mounting holes for mounting the pretightening force springs are formed in the sliding bearing seat, and the pretightening force springs are embedded in the third mounting holes and are matched with the pretightening force positioning grooves of the main body casing to output bearing pretightening force.
Furthermore, a fourth mounting hole is formed in the sliding bearing seat, and a second temperature sensor is arranged in the fourth mounting hole.
Specifically, the middle section of the rotor rotating shaft is provided with a plurality of magnetic steel mounting grooves which are uniformly distributed n along the radial direction of the rotor rotating shaftgEach magnetic steel mounting groove is internally provided with npA rotor magnetic steel sheet, wherein ng、npNot less than 2, adopting encapsulation and magnetic steel protective sleeve to make rotor magneticThe steel sheet is fastened on the outer side of the rotor rotating shaft, the rotor rotating shaft is provided with a front balance ring and a rear balance ring on two sides of the rotor magnetic steel sheet, the front balance ring is matched and positioned with the inner ring of the second front bearing, and the rear balance ring is matched and positioned with the inner ring of the first rear bearing.
Specifically, a third temperature sensor is arranged inside the stator assembly.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the utility model relates to a synchronous accurate grinding electricity main shaft of permanent magnetism adopts permanent magnet synchronous machine as the core power parts of electricity main shaft, makes from this the utility model discloses a do not have transmission device between electricity main shaft power parts and the main shaft, have higher conversion efficiency, response speed and machining precision for traditional mechanical type grinding main shaft.
Furthermore, a main shaft cooling liquid containing cavity is formed in the middle of the main body casing, two ends of a main shaft cooling liquid sealing sleeve are matched with sealing rings in a second groove and a third groove on the main body casing and used for preventing main shaft cooling liquid from leaking, the main shaft cooling liquid containing cavity of the main body casing is connected with a main shaft cooling liquid inlet channel and a main shaft cooling liquid outlet channel, and cooling of the electric main shaft is achieved through circulation of the main shaft cooling liquid.
Further, the utility model discloses grinding electric main shaft's back bearing subassembly has the sliding bearing seat structure, and this structure has effectively promoted the loading of electric main shaft preceding, back bearing pretightning force to at the high-speed high accuracy operation in-process of electric main shaft, can effectively release because the factor such as generate heat leads to the stress that electric main shaft axial length changes and produce, prevent that electric main shaft preceding, back bearing from leading to locking or damaging owing to born too big load under this condition.
Further, the utility model discloses the main shaft rotor and the electric motor rotor of grinding electricity main shaft are compact integrated structure, and electricity main shaft motor's rotor magnetic steel sheet direct mount is in the magnet steel mounting groove of rotor shaft, and the rotor shaft is the iron core of electric motor rotor and the power pivot of electricity main shaft again, has higher integrated level than traditional grinding electricity main shaft, and has effectively avoided the error that produces because the assembly between main shaft rotor and the electric motor rotor, very big improvement grinding electricity main shaft's machining precision.
Further, the utility model discloses the stator of grinding electricity main shaft adopts the fractional slot winding form that has the slope structure, compares in conventional PMSM, has lower tooth's socket torque and less torque fluctuation, makes electricity main shaft motor have lower running noise from this, has improved the stability of main shaft operation, has very big promotion effect to the improvement of grinding electricity main shaft machining precision.
Further, the utility model discloses grinding electric main shaft utilizes vibration sensor and temperature sensor's prefabricated installation to realize the online monitor function of electric main shaft bearing vibration and key parts temperature, can utilize vibration test result real-time feedback main shaft rotor dynamic balance state, bearing and other rotating parts fault signature, and can provide necessary vibration data for the online dynamic balance adjusting device of electric main shaft, the temperature sensor of prefabricated installation then can reflect key parts's the temperature variation condition, establish and revise main shaft simulation temperature field simulation result based on the temperature test result, cooperation dynamic compensation device realizes the online compensation of machining precision of grinding electric main shaft dynamic temperature test result.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural view of the electric spindle of the present invention;
fig. 2 is a cross-sectional view of the rotor assembly of the present invention.
Wherein: 5. a stator assembly; 6. a phase tachometer sensor assembly; 7. a vibration sensor; 9. a main body casing; 10. a front bearing shell; 11. a front end cover of the shell; 13. a main shaft cooling liquid cavity; 26. a motor power supply line; 33. a first temperature sensor; 34. a first front bearing; 35. a second front bearing; 38. a first rear bearing; 39. a second rear bearing; 42. a pre-tightening force spring; 43. a sliding seat cover; 52. a second temperature sensor; 60. a rotor shaft; 62. a rotor magnetic steel sheet; 63. encapsulating; 64. a magnetic steel protective sleeve; 65. a front gimbal; 66. a rear balancing ring; 69. a front lock nut; 70. and then the nut is locked.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the utility model relates to a synchronous accurate grinding electricity main shaft of permanent magnetism, including casing subassembly, preceding bearing assembly, back bearing assembly, rotor subassembly, stator module 5, phase place rotational speed sensor subassembly 6, vibration sensor 7, temperature sensor subassembly.
The core of the casing assembly is a main body casing 9, a stator assembly 5 is arranged in the main body casing 9, the stator assembly 5 is sleeved on a rotor rotating shaft 60 of the rotor assembly, the stator assembly 5 is positioned in the middle of the main body casing 9, a main shaft cooling liquid accommodating cavity 13 is arranged between the main body casing 9 and the stator assembly 5, one end of the main body casing 9 is sequentially provided with a front bearing assembly and a casing front end cover 11, the other end is sequentially provided with a rear bearing assembly and a casing rear end cover, a vibration sensor 7 is arranged on the front bearing assembly, a phase rotating speed sensor assembly 6 is arranged on the casing rear end cover, the front bearing assembly, the stator assembly 5 and the rear bearing assembly are respectively provided with a temperature sensor assembly, and the rear.
The main body casing 9 is provided with a first groove, the stator assembly 5 is arranged in a main shaft cooling liquid seal sleeve, the first groove and the main shaft cooling liquid seal sleeve form a main shaft cooling liquid containing cavity 13 by interference fit, the matching surface needs to ensure that cooling liquid can bear the liquid supply pressure and the phenomenon of cooling liquid overflow is avoided, in order to further prevent the main shaft cooling liquid from leaking and overflowing, two ends of the main shaft cooling liquid seal sleeve are matched with a seal ring in a second groove and a third groove on the main body casing 9 and tightly press the seal ring by using the main shaft cooling liquid seal sleeve, the second groove and the third groove are respectively positioned at two sides of the first groove, the main shaft cooling liquid containing cavity 13 of the main body casing 9 is connected with a main shaft cooling liquid inlet channel and a main shaft cooling liquid outlet channel, the main shaft cooling liquid inlet channel is connected with a first pipe joint and a cooling liquid inlet pipe, and similarly, the main shaft cooling liquid outlet channel is connected with a second, therefore, the cooling of the electric spindle is realized by utilizing the circulation of the spindle cooling liquid, and the spindle cooling liquid water inlet channel, the spindle cooling liquid water outlet channel and the motor lead channel of the main body casing 9 are distributed and arranged along the radial direction of the main body casing 9 at corresponding included angles.
The main body housing 9 also has a motor wire passage for placing motor power supply wires 26 of the stator assembly 5.
The front bearing assembly comprises a front bearing shell 10, the front bearing shell 10 provides a mounting base and mounting positioning for the front bearing assembly, and is fixedly mounted at the front end of the main body casing 9 through a countersunk nut, a gap is required to be ensured between the end surface of the front bearing shell 10 and the stator assembly, and a front bearing lubricating medium channel is arranged in the front bearing lubricating medium channel.
The front bearing housing 10 has a front bearing lubrication medium passage and is connected to a third pipe joint and a front lubrication medium conduit for supplying a lubrication medium to the front bearing assembly, and the lubrication medium passage and the structural members can meet the requirements of various lubrication methods such as oil-gas lubrication, oil mist lubrication, and the like.
The first mounting hole that has in the front bearing shell 10 outside is used for installing vibration sensor 7 to utilize hollow sealed sleeve to draw out the sensor cable, vibration sensor 7 laminating front bearing assembly installation for the vibration condition of test front bearing assembly, the exit position of first mounting hole has sealed sleeve, be used for preventing that external pollutant from getting into the test that first mounting hole influences vibration sensor 7, the diameter of first mounting hole should be greater than the biggest external diameter of vibration sensor 7, in order to avoid the vibration of front bearing shell 10 to influence the test result accuracy.
The second mounting hole at the outer side of the front bearing shell 10 is used for mounting the first temperature sensor 33, so that the temperature change condition of the front bearing assembly during the operation of the main shaft can be accurately tested.
The front bearing assembly is provided with a first front bearing 34, a second front bearing 35 and a front liquid guiding ring, the first front bearing 34 is close to the front end face of the main shaft, the center position of the first front bearing 34 is aligned with the center of the second mounting hole 30, the second front bearing 35 is close to the rear end face of the main shaft and is fixedly installed in a mounting and positioning mode with the bearing of the front bearing shell 10, the front liquid guiding ring 36 is installed between the first front bearing 34 and the second front bearing 35, and a plurality of liquid guiding holes 37 are formed in the two ends of the front liquid guiding ring 36 to guide a lubricating medium to enter the first front bearing 34 and the second front bearing 35, so that the first front bearing 34 and the second front bearing 35 are lubricated and cooled.
The vibration sensor 7 is attached to the outer ring of the first front bearing 34 and used for testing the vibration condition of the front bearing assembly under the dynamic running condition of the electric spindle, the vibration sensor 7 can adopt a vibration acceleration sensor or a vibration speed sensor, the test result can be used for adjusting the initial dynamic balance state of the electric spindle, and necessary test data can be provided for the online dynamic balance device in the online running process of the electric spindle.
The front end cover 11 of the casing is located at the foremost end of the electric spindle and fixed by screws and used for protecting and fixing the bearing outer ring of the front bearing assembly, the mounting hole position on the front end cover 11 of the casing is a countersunk hole so as to ensure that the mounting screws cannot exceed the front end face, the front bearing positioning groove of the front end cover 11 of the casing is used for compressing the outer ring of the first front bearing 34, and the diameter of the inner hole of the front end cover 11 of the casing is larger than the maximum outer diameter of the front locking nut 69 on the rotor rotating shaft 60 so as to avoid interference with the rotor rotating shaft 60 in operation.
The rear bearing assembly is provided with a bearing supporting structure capable of axially sliding, can realize the supply of a bearing lubricating medium, has the function of bearing pretightening force loading, can adapt to the variable load in the running process of the electric spindle,
the rear bearing assembly comprises a first rear bearing, a second rear bearing, a rear liquid guide ring, a sliding bearing seat, a pre-tightening force spring 42 and a sliding seat sleeve 43, the first rear bearing 38 is close to the front end face of the main shaft, a bearing outer ring of the first rear bearing is fixedly installed with the sliding bearing seat, the second rear bearing 39 is close to the rear end face of the main shaft and is fixedly installed and positioned with a bearing of the sliding bearing seat, the rear liquid guide ring is installed between the first rear bearing 38 and the second rear bearing 39, and a plurality of liquid guide holes are formed in the two ends of the rear liquid guide ring along the radial direction to guide a lubricating medium to enter the first rear bearing 38 and the second rear bearing 39, so that the first rear bearing 38 and the second rear bearing 39 are lubricated and cooled.
The sliding bearing block has a rear bearing lubrication medium passage connected with the fourth pipe joint and the rear lubrication medium conduit for supplying a lubrication medium to the rear bearing assembly position.
The sliding bearing seat is provided with a plurality of third mounting holes for mounting pretightening force springs, and the pretightening force springs are embedded in the third mounting holes and output bearing pretightening force through matching with the pretightening force positioning grooves of the main body casing 9.
Sliding bearing seat still has the fourth mounting hole, has second temperature sensor 52 in the fourth mounting hole for the temperature change condition of test back bearing assembly 3 will make rotor shaft 60 produce less thermal expansion because the rising of temperature in the electricity main shaft operation process, though it is small nevertheless be enough to influence the bearing pretension condition, brings very big threat to the safety and stability operation of electricity main shaft, and this moment because the utility model discloses the existence of sliding seat cover makes sliding bearing seat and each part that is connected rather than can slide along axial direction, solves a great deal of problems that the bearing pretension change brought with this to improve the security and the machining precision of electricity main shaft.
The sliding sleeve is located between the main body housing 9 and the sliding bearing seat, so that the sliding bearing seat and the components connected thereto can slide in the axial direction.
N are uniformly distributed in the third mounting hole along the radial direction of the sliding bearing seathThe pre-tightening spring with the elastic coefficient of k also has nhAnd is tightly pressed with a pretightening force positioning groove, and when the compression amount is l, the pretightening force born by the sliding bearing seat is Fp＝nhkl。
The rear fluid ring serves to position the distance between the first rear bearing 38 and the second rear bearing 39, and the first rear bearing 38 and the second rear bearing 39 are installed in the direction opposite to the installation direction of the first front bearing 34 and the second front bearing 35.
The rear end cover of the shell is located at the rearmost end of the electric spindle and provided with a first yielding hole, a second yielding hole, a third yielding hole, a fourth yielding hole and a fifth yielding hole, the first yielding hole is used for guiding and installing a first pipe joint, the second yielding hole is used for guiding and installing a second pipe joint, the third yielding hole is used for guiding and installing a fourth pipe joint, the fourth yielding hole is used for a motor power supply line to penetrate, the fifth yielding hole is used for guiding a second temperature sensor 52 wire to penetrate, and the rear end cover of the shell is further provided with a phase rotating speed sensor assembly 6 installation position.
The inner diameter of the yielding hole is larger than the maximum outer diameter of the yielding part, the phase rotating speed sensor reading head and the phase rotating speed sensor circuit board of the phase rotating speed sensor assembly 6 are installed on the rear end cover of the shell, and the phase rotating speed sensor reading head and the coded disc at the rearmost end of the rotor rotating shaft 60 are kept at a proper distance in the mounting and rotating process, so that the phase rotating speed sensor assembly 6 can accurately acquire the running state information of the electric spindle.
Referring to fig. 2, the rotor assembly adopts an integrated compact structure, integrates the motor rotor and the electric spindle rotor into a whole, and omits a mounting structure between the motor rotor and the electric spindle rotorEach part of the assembly is borne by a rotor rotating shaft 60, a plurality of magnetic steel mounting grooves are arranged in the middle section of the rotor rotating shaft 60, and n is uniformly distributed in the magnetic steel mounting grooves along the radial direction of the rotor rotating shaft 60gEach magnetic steel mounting groove is internally provided with npA rotor magnetic steel sheet 62, wherein ng、npAnd the rotor magnetic steel sheet 62 is fastened on the outer side of the rotor rotating shaft 60 by adopting an encapsulating cover 63 and a magnetic steel protective sleeve 64, the magnetic steel protective sleeve 64 can be tightly wound carbon cloth, a carbon fiber pipe or a thin-wall titanium alloy pipe and other non-strong magnetic materials, a front balance ring 65 and a rear balance ring 66 are installed on the two sides of the rotor magnetic steel sheet 62 of the rotor rotating shaft 60, the front balance ring 65 is matched and positioned with the inner ring of the second front bearing 35, and the rear balance ring 66 is matched and positioned with the inner ring of the first rear bearing 38.
The rotor shaft 60 has a front bearing inner race locating sleeve and a rear bearing inner race locating sleeve, and the front bearing inner race locating sleeve is located between the first front bearing 34 inner race and the second front bearing inner race 35 for locating the two bearing positions. The rear bearing inner ring locating sleeve is positioned between the first rear bearing 38 inner ring and the second rear bearing 39 inner ring and used for locating the two bearing positions.
The inner ring of the first front bearing 34 is installed and positioned by a front locking nut 69, the inner ring of the second rear bearing 39 is installed and positioned by a rear locking nut 70, the front locking nut 69 is provided with a plurality of front installation counterweight holes along the circumferential direction and is fixed on the rotor rotating shaft by an internal thread opposite to the rotating direction of the main shaft, and the rear locking nut 70 is provided with a plurality of rear installation counterweight holes along the circumferential direction and is fixed on the rotor rotating shaft by an internal thread opposite to the rotating direction of the main shaft.
The positioning of the inner ring of the second front bearing 35 and the inner ring of the first rear bearing 38 on the rotor rotating shaft 60 is realized by a front balance ring 65 and a rear balance ring 66, the front balance ring 65 and the rear balance ring 66 can be used for adjusting the dynamic balance mass of the rotor assembly in the machining and manufacturing process, the weight removing mode is usually adopted, the positioning of the inner ring of the first front bearing 34 and the inner ring of the second rear bearing 39 is realized by a front lock nut 69 and a rear lock nut 70, meanwhile, the front lock nut 69 and the rear lock nut 70 can also be used for correcting the dynamic balance state after the electric spindle is assembled and adjusting the dynamic balance state in the balance, and the weight hole and the rear balance hole can be arranged in frontThe dynamic balance adjustment function is realized by adding mass balancing weights in the mounting weight holes, and n is uniformly distributed in the front mounting weight hole and the rear mounting weight hole along the radial direction of the rotor rotating shaft 60bA, wherein nbIt is generally necessary to satisfy nbAnd the code wheel of the phase rotating speed sensor assembly 6 is required to be arranged at the central position of the rotor rotating shaft 60, so that the dynamic balance state of the electric spindle under the operation working condition is not influenced.
The foremost end of the rotor rotating shaft 60 is provided with a grinding tool mounting interface, and the rear end of the rotor rotating shaft 60 is provided with a phase rotating speed sensor assembly 6 mounting position.
Good insulating property should exist between the silicon steel sheets, the jig with the inclination angle is used for stacking and is pressed by hydraulic pressure, and the stator core formed by stacking the silicon steel sheets has nsA plurality of inclined winding slots, the winding slots being characterized by a number n of polespThe number of phases is nmThe number q of slots of each phase of each pole is equal to ns/(npnm) Is a fraction, if the denominator of the simplest fraction of q is d, then nsThe least common multiple of d is nlTherefore, the inclination angle of the winding slot of the winding is thetag＝2π/nlTherefore, the harmonic waves of the electromotive force and the magnetomotive force are weakened, the running stability of the motor is improved, and a winding wire in the winding wire winding groove is embedded into a third temperature sensor for testing the temperature change condition of the stator assembly 5.
And a motor air gap is formed between the maximum outer diameter of the rotor assembly and the minimum inner diameter of the stator assembly 5.
The phase position and rotation speed sensor assembly 6 comprises a code disc, a phase position and rotation speed sensor reading head and a phase position and rotation speed sensor circuit board, the code disc is installed and fixed at the rearmost end of a rotor rotating shaft 60 of the rotor assembly, and the phase position and rotation speed sensor reading head and the phase position and rotation speed sensor circuit board are installed at a specific installation position of a rear end cover of the machine shell.
The temperature sensor assembly comprises a first temperature sensor 33, a second temperature sensor 52, a third temperature sensor and a temperature test signal processing module, wherein the temperature test signal processing module is used for power supply, signal acquisition, analog-to-digital conversion and data transmission communication of the temperature sensors.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a synchronous accurate grinding electricity main shaft of permanent magnetism, a serial communication port, including main part casing (9), be provided with stator module (5) in main part casing (9), stator module (5) suit is on rotor rotating shaft (60) of rotor subassembly, be provided with main shaft coolant liquid between main part casing (9) and stator module (5) and hold chamber (13), the one end of main part casing (9) has set gradually front bearing subassembly and casing front end housing (11), the other end has set gradually back bearing subassembly and casing rear end cap, be provided with vibration sensor (7) on the front bearing subassembly, be provided with phase place rotational speed sensor subassembly (6) on the casing rear end cap, front bearing subassembly, be provided with the temperature sensor subassembly on stator module (5) and the back bearing subassembly.
2. The permanent magnet synchronous precision grinding electric spindle according to claim 1, characterized in that a first groove is arranged on the main body casing (9), the stator assembly (5) is arranged in the spindle coolant gland, the first groove and the spindle coolant gland form a spindle coolant cavity (13) by interference fit, and the spindle coolant cavity (13) is connected with the spindle coolant water inlet channel and the spindle coolant water outlet channel.
3. The permanent magnet synchronous precision grinding electric spindle according to claim 2, wherein a second groove and a third groove are respectively arranged on two sides of the first groove, and two ends of a spindle coolant seal cartridge are matched with seal rings arranged in the second groove and the third groove; the main shaft cooling liquid water inlet channel, the main shaft cooling liquid water outlet channel and the motor lead channel are distributed and arranged along the radial direction of the main body casing (9) with corresponding included angles.
4. The permanent magnet synchronous precision grinding electric spindle according to claim 1, characterized in that the front bearing assembly comprises a front bearing shell (10), the front bearing shell (10) is fixed at the front end of the main body casing (9), and a gap is arranged between the end surface of the front bearing shell (10) and the stator assembly; the front bearing assembly is sequentially provided with a first front bearing (34) and a second front bearing (35), the vibration sensor (7) is attached to the outer ring of the first front bearing (34), and a first temperature sensor (33) is arranged at the center of the first front bearing (34) close to the front end face of the main shaft.
5. The permanent magnet synchronous precision grinding electric main shaft is characterized in that a second front bearing (35) is close to the rear end face of the main shaft and is fixedly installed and matched with a bearing of the front bearing shell (10), and a front liquid guiding ring is installed between the first front bearing (34) and the second front bearing (35).
6. The permanent magnet synchronous precision grinding electric main shaft according to claim 1, characterized in that the rear bearing assembly comprises a first rear bearing (38) and a second rear bearing (39), the first rear bearing (38) is close to the front end face of the main shaft, the outer ring of the first rear bearing is fixedly installed with the sliding bearing seat, the second rear bearing (39) is close to the rear end face of the main shaft and is fixedly installed and positioned with the bearing of the sliding bearing seat, a rear liquid guide ring is installed between the first rear bearing (38) and the second rear bearing (39), and a sliding seat sleeve is arranged between the main machine shell and the sliding bearing seat.
7. The permanent magnet synchronous precision grinding electric spindle according to claim 6, characterized in that the sliding bearing seat is provided with a plurality of third mounting holes for mounting pre-tightening force springs, and the pre-tightening force springs are embedded in the third mounting holes and output the pre-tightening force of the bearing through the cooperation with the pre-tightening force positioning grooves of the main body casing (9).
8. The permanent magnet synchronous precision grinding electric spindle according to claim 6, wherein a fourth mounting hole is provided on the sliding bearing seat, and a second temperature sensor is provided in the fourth mounting hole.
9. The permanent magnet synchronous precision grinding electric spindle according to claim 1, characterized in that a plurality of magnetic steel mounting grooves are arranged in the middle section of the rotor rotating shaft (60), and n is uniformly distributed in the magnetic steel mounting grooves along the radial direction of the rotor rotating shaft (60)gEach magnetic steel mounting groove is internally provided with npA rotor magnetic steel sheet (62) in which ng、npNot less than 2, adopt embedment (63) and magnet steel protective sheath (64) with rotor magnetic steel sheet (62) fastening in rotor pivot (60) outside, rotor pivot (60) install preceding stabilizer ring (65) and back stabilizer ring (66) in rotor magnetic steel sheet (62) both sides, preceding stabilizer ring (65) and the inner circle cooperation location of second front bearing (35), back stabilizer ring (66) and the inner circle cooperation location of first back bearing (38).
10. The permanent magnet synchronous precision grinding electric spindle according to claim 1, characterized in that a third temperature sensor is arranged inside the stator assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922442669.7U CN210958055U (en) | 2019-12-30 | 2019-12-30 | Permanent magnet synchronous precision grinding electric spindle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922442669.7U CN210958055U (en) | 2019-12-30 | 2019-12-30 | Permanent magnet synchronous precision grinding electric spindle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018937A (en) * | 2020-08-07 | 2020-12-01 | 珠海格力电器股份有限公司 | Adjusting mechanism for axial pretightening force of motor and motor |
| CN112222933A (en) * | 2020-10-22 | 2021-01-15 | 哈尔滨理工大学 | Variable-voltage pre-tightening device of high-speed electric spindle |
| CN112775447A (en) * | 2021-01-05 | 2021-05-11 | 沈阳建筑大学 | Self-balancing electric spindle with automatic pre-tightening function |
-
2019
- 2019-12-30 CN CN201922442669.7U patent/CN210958055U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018937A (en) * | 2020-08-07 | 2020-12-01 | 珠海格力电器股份有限公司 | Adjusting mechanism for axial pretightening force of motor and motor |
| CN112222933A (en) * | 2020-10-22 | 2021-01-15 | 哈尔滨理工大学 | Variable-voltage pre-tightening device of high-speed electric spindle |
| CN112775447A (en) * | 2021-01-05 | 2021-05-11 | 沈阳建筑大学 | Self-balancing electric spindle with automatic pre-tightening function |
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Effective date of registration: 20230821 Address after: Room 502, 5th Floor, Instrument Building, No. 81 Jinye 1st Road, High tech Zone, Xi'an City, Shaanxi Province, 710076 Patentee after: Shaanxi Jiusi Hechuang Motor Technology Co.,Ltd. Address before: 710077 No. 401, Unit 1, Building 5, Shiqiao Xinyuan, Yuhuazhai, Yanta District, Xi'an, Shaanxi Patentee before: Shaanxi Furuntan Machinery Equipment Co.,Ltd. |