CN114006509B - On-site assembly method of direct-connection suspension type permanent magnet low-speed synchronous mining lifting equipment - Google Patents
On-site assembly method of direct-connection suspension type permanent magnet low-speed synchronous mining lifting equipment Download PDFInfo
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- CN114006509B CN114006509B CN202111348304.3A CN202111348304A CN114006509B CN 114006509 B CN114006509 B CN 114006509B CN 202111348304 A CN202111348304 A CN 202111348304A CN 114006509 B CN114006509 B CN 114006509B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/16—Centering rotors within the stator; Balancing rotors
- H02K15/165—Balancing the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
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Abstract
A field assembly method of a direct-connected suspension type permanent magnet low-speed synchronous mining lifting device, wherein the direct-connected suspension type permanent magnet low-speed synchronous mining lifting device comprises the following steps: a hoister and a low-speed permanent magnet synchronous motor; a lifter taper shaft extends from one side end surface of the lifter; a motor rotor is arranged in the low-speed permanent magnet synchronous motor, and a taper hole shaft is arranged in the motor rotor; the elevator taper shaft is matched with the taper hole shaft of the motor rotor, so that the elevator taper shaft is fixedly connected with the motor rotor; before the motor shell is assembled with the motor rotor, a magnetism isolating sleeve is fixedly arranged on the outer circumference of the motor rotor, the magnetic attraction between the motor rotor and the stator is greatly reduced through the magnetism isolating sleeve, and the attraction accident of the rotor and the stator in the motor shell transferring process is avoided, so that the technical bottleneck that the existing high-power direct-connected suspended permanent magnet low-speed synchronous mining lifting equipment cannot be assembled on site is overcome, and the popularization and application of the high-power direct-connected suspended permanent magnet low-speed synchronous mining lifting equipment are realized.
Description
Technical Field
The invention relates to the technical field of mine hoists, in particular to a field assembly method of a direct-connected suspension type permanent magnet low-speed synchronous mine hoisting device.
Background
The direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment is adopted, and a permanent magnet low-speed synchronous motor is adopted to drive a lifting machine, and meanwhile, a traditional coupling is omitted, so that the direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment has the advantages of being small in overall mass, small in moment of inertia, large in torque, efficient and energy-saving; because of the adoption of a suspension type structure, the assembly of a motor and a lifter is complex, and for the low-power direct-connection suspension type permanent magnet low-speed synchronous mining lifting equipment, the equipment can be preassembled at a factory end and then transported to a use site for installation; however, for the high-power direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment, the transportation is carried out after the factory end is preassembled, so that the problem that the transportation volume and the weight of the mining lifting machine are out of limits can be caused, and the mining lifting machine can not be implemented, therefore, the mining lifting machine can only be installed on the machine use site; however, when the permanent magnet low-speed synchronous motor is installed on the using site, a huge technical obstacle is encountered: because the permanent magnet of fixed setting on the permanent magnetism low-speed synchronous motor rotor is Gao Jiang ferroboron, the clearance between motor rotor and the stator is below 7 millimeters in addition, therefore motor rotor and stator are when assembling, the magnetic attraction between the two is unusual huge, in addition use the field installation lack necessary auxiliary fixtures to carry out spacing to motor rotor and stator, can take place the serious assembly accident that motor rotor and stator were in the same place in the assembly process, lead to the motor to scrap, bring huge economic loss for direct-connected suspension type permanent magnetism low-speed synchronous mining lifting device manufacturing enterprise, become the technical barrier that high-power direct-connected suspension type permanent magnetism low-speed synchronous mining lifting device popularization and application can't surmount simultaneously.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention discloses a field assembly method of a direct-connected suspension type permanent magnet low-speed synchronous mining lifting device, wherein the direct-connected suspension type permanent magnet low-speed synchronous mining lifting device comprises: a hoister and a low-speed permanent magnet synchronous motor; a lifter taper shaft extends from one side end surface of the lifter; a motor rotor is arranged in the low-speed permanent magnet synchronous motor, and a taper hole shaft is arranged in the motor rotor; the elevator taper shaft is matched with the taper hole shaft of the motor rotor, so that the elevator taper shaft is fixedly connected with the motor rotor; the low-speed permanent magnet synchronous motor further comprises a motor shell, a motor left end cover and a motor right end cover, wherein the motor left end cover and the motor right end cover are fixedly arranged at two ends of the motor shell, a motor rotor is coaxially arranged in a stator cavity of the motor shell, and the motor rotor is rotationally connected with the motor left end cover and the motor right end cover; in the field assembly process of the direct-connected suspended permanent magnet low-speed synchronous mining lifting device, a magnetism isolating sleeve is fixedly arranged on the outer circumference of the motor rotor before the motor housing and the motor rotor are assembled, and the magnetic attraction between the motor rotor and the stator is greatly reduced through the magnetism isolating sleeve, so that when the mining lifting machine is assembled on site, even if necessary auxiliary tools for limiting the assembly of the motor rotor and the stator are absent, the motor rotor and the stator can be prevented from being attracted together, and the technical obstacle that the conventional high-power direct-connected suspended permanent magnet low-speed synchronous mining lifting device cannot be assembled on site is overcome.
In order to achieve the aim of the invention, the invention adopts the following technical scheme: a method for on-site assembly of a direct-connected suspended permanent magnet low-speed synchronous mining lifting device, wherein the direct-connected suspended permanent magnet low-speed synchronous mining lifting device comprises the following steps: a hoister and a low-speed permanent magnet synchronous motor; a lifter taper shaft extends from one side end surface of the lifter; a motor rotor is arranged in the low-speed permanent magnet synchronous motor, and a taper hole shaft is arranged in the motor rotor; the elevator taper shaft is matched with the taper hole shaft of the motor rotor, so that the elevator taper shaft is fixedly connected with the motor rotor; the low-speed permanent magnet synchronous motor further comprises a motor shell, a motor left end cover and a motor right end cover, wherein the motor left end cover and the motor right end cover are fixedly arranged at two ends of the motor shell, a motor rotor is coaxially arranged in a stator cavity of the motor shell, and the motor rotor is rotationally connected with the motor left end cover and the motor right end cover; in the field assembly process of the direct-connected suspension type permanent magnet low-speed synchronous mining lifting device, a magnetism isolating sleeve is fixedly arranged on the outer circumference of a motor rotor before a motor shell and the motor rotor are assembled; the magnetic attraction between the motor rotor and the stator is greatly reduced through the magnetism isolating sleeve, so that when the mining hoist is assembled on site, even if the necessary auxiliary tool for limiting the assembly of the motor rotor and the stator is lacked, the motor rotor and the stator can be prevented from being attracted together, the technical obstacle that the existing high-power direct-connected suspended permanent magnet low-speed synchronous mining hoisting equipment cannot be assembled on site is overcome, and the popularization and application of the high-power direct-connected suspended permanent magnet low-speed synchronous mining hoisting equipment are realized.
Further, the on-site assembly of the direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment comprises the following steps:
s1, mounting a lifter: the hoister is installed and fixed on the processed foundation to bear the impact force in the subsequent motor rotor assembly process; the elevator taper shaft is in a horizontal state; the purpose of maintaining the elevator taper shaft horizontal state is two: 1. the whole machine assembly quality of the direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment is ensured, so that the direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment can maintain a stable and good working state for a long time; 2. in the subsequent field assembly process of the permanent magnet low-speed synchronous motor, the motor shell can be ensured to smoothly pass through the motor rotor; in the assembly process of the motor shell, the overhead crane is used for horizontally moving, if the conical shaft of the elevator cannot be kept horizontal and is in an inclined state, then a motor rotor arranged on the conical shaft of the elevator is also in an inclined state, the motor shell needs to horizontally move when moving through the inclined motor rotor, and meanwhile, the height direction of the motor shell needs to be adjusted, so that the assembly difficulty of the motor shell is greatly increased, a magnetic isolation sleeve arranged on the outer circumference of the motor rotor is damaged by slight carelessness in the assembly process, the magnetic isolation sleeve loses the magnetic isolation effect once being damaged, and the motor rotor and a stator can be seriously assembled due to the attraction of magnetic attraction, so that the motor is scrapped;
s2, mounting a left end cover of the motor: assembling a left end cover of the motor on a tapered shaft of a lifting machine through a bearing, assembling a bearing end cover and finishing adjustment of a bearing gap; in the step, the bearing gap in the left end cover of the motor is completely eliminated, and a certain pre-compression is applied between the bearing inner sleeve and the bearing outer sleeve, so that the connection rigidity of the left end cover of the motor and a taper shaft of a lifter is improved; when the subsequent motor shell is assembled, after the motor shell is connected with the left end cover of the motor, the motor shell and the conical shaft of the elevator also have higher connection rigidity, so that the motor shell and the motor rotor are prevented from being changed in larger coaxiality on the right side after the magnetism isolating sleeve is extracted, and the assembly of the right end cover and the bearing of the motor is prevented from being influenced;
s3, mounting a motor rotor: the motor rotor is assembled on the elevator taper shaft through the cooperation of the elevator taper shaft and the taper hole shaft of the motor rotor; the elevator taper shaft is matched with the taper hole shaft of the motor rotor through a long taper hole, and because the elevator taper shaft and the taper hole shaft have machining errors and huge torque is required to be transmitted through the matching of the elevator taper shaft and the taper hole shaft, the motor rotor is required to be impacted by a hydraulic impact hammer in the assembly process of the motor rotor, and the elevator taper shaft and the taper hole shaft of the motor rotor are ensured to be in an interference fit state; the impact force received by the motor rotor in the assembly process is finally transmitted to the elevator through the taper hole shaft and the elevator taper shaft; after the motor rotor is assembled, locking the lockbolt to prevent the permanent magnet low-speed synchronous motor from loosening when the elevator taper shaft is matched with the taper hole shaft in the working process; the magnetic isolation sleeve is fixedly arranged on the outer circumference of the motor rotor, so that preparation is made for the subsequent motor shell assembly, and the motor rotor and the stator are prevented from generating attraction accidents in the motor shell assembly process;
s4, mounting a motor shell: the motor shell penetrates through the motor rotor, so that the left end cover of the motor is abutted against the left end face of the motor shell, then the left end cover of the motor is fixedly connected with the motor shell through bolts, and the motor shell is actually fixedly connected with the elevator taper shaft; adjusting levelness of the motor casing, installing and fixing the motor casing on the processed basis, and then extracting the magnetism isolating sleeve on the outer circumference of the motor rotor; after the magnetic isolation sleeve is pulled out, the motor shell is fixedly connected with the elevator taper shaft, and the motor rotor is in a fixed connection state with the stator in the motor shell, so that the motor rotor and the stator in the motor shell can overcome the abnormal huge magnetic attraction and still keep a separation state;
s5, mounting a right end cover of the motor: firstly, fixedly connecting a right end cover of a motor to the right end surface of a motor shell, then assembling a bearing between a taper hole shaft and the right end cover of the motor, and finally assembling a bearing end cover and finishing adjustment of a bearing gap; the reason for adopting the assembly sequence is as follows: after the motor shell is assembled, although the motor rotor and the stator in the motor shell are still kept in a separated state, the motor rotor and the motor shell are not in an ideal coaxial state, but have certain coaxiality errors, if the assembly sequence that the taper hole shaft and the motor right end cover are connected through the bearing and then the motor right end cover is fixedly assembled on the right end face of the motor shell is adopted, the assembly of the motor right end cover and the motor shell is very difficult due to the coaxiality errors between the motor rotor and the motor shell; after the assembly sequence is adopted, the coaxiality error of the motor rotor and the motor shell is forcedly corrected by utilizing the process of adjusting the bearing clearance, so that the assembly process is easy, and the final assembly quality is ensured;
s6, final adjustment of bearing clearance in a left end cover of the motor: in the step S2 of installing the left end cover of the motor, the bearing in the left end cover of the motor is in a state that the gap is completely eliminated and a certain pre-pressure is applied after the installation, if the bearing rotates in the state, the problems of large rotation resistance, serious heat generation and rapid abrasion exist, so that the assembly gap of the bearing needs to be readjusted; when the assembly gap of the bearing is readjusted, firstly, the connecting bolt of the bearing end cover on the left end cover of the motor is disassembled, a bearing gap adjusting pad with matched size is arranged between the bearing end cover and the left end cover of the motor, and the connecting bolt of the bearing end cover is readmitted; after the direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment is completely assembled, the assembly gaps of the two tapered roller bearings in the left end cover of the motor can be automatically redistributed through test operation, and finally the designed operation gaps are achieved.
Further, in the process of installing the elevator, adjusting the horizontal state of the elevator taper shaft by arranging a sizing block between the elevator and the foundation; after the adjustment of the horizontal state of the taper shaft of the elevator is completed, the elevator is fixedly connected with a foundation through foundation bolts and nuts.
Further, two tapered roller bearings are adopted as a connecting bearing between the left end cover of the motor and the tapered shaft of the elevator; the assembly process of the left end cover of the motor is as follows:
s21, installing two tapered roller bearings in a bearing installation hole of a left end cover of the motor in a manner that large end faces of inner sleeves are contacted; installing a bearing end cover, screwing a connecting bolt between the bearing end cover and a left end cover of the motor, and keeping a loose state by the connecting bolt, wherein at the moment, the two tapered roller bearings are not preloaded, and the inner sleeves of the bearings are in a floating state, so that the inner sleeves of the two tapered roller bearings are convenient to assemble with a tapered shaft of a lifter;
s22, assembling a motor left end cover with the bearing assembled on a tapered shaft of a hoist, lifting the motor left end cover by using a crown block during assembly to enable an inner sleeve hole of an outer bearing to be sleeved on the tapered shaft of the hoist, propping one end of a sleeve against the end face of an inner sleeve of the inner bearing, impacting the other end of the sleeve by using a hydraulic impact hammer until the end face of the inner sleeve of the outer bearing is abutted against a shaft shoulder of the tapered shaft of the hoist, fixing the bearing inner sleeve on the tapered shaft of the hoist by using a bearing lock nut, and finally locking a connecting bolt between the bearing end cover and the left end cover of the motor; the supplementary explanation is: the step height of the pressing bearing sleeve on the bearing end cover on the motor left end cover is prepared according to the actually measured depth of the bearing mounting hole of the motor left end cover and the actually measured distances of the sleeve large ends of the two tapered roller bearings arranged back to back and is provided with a positive tolerance, so that after a connecting bolt between the bearing end cover and the motor left end cover is locked, a bearing gap in the motor left end cover is completely eliminated and a certain pre-pressing is applied, the connection between the motor left end cover and a taper shaft of a lifter has higher rigidity, and the aim is to ensure that after the subsequent motor shell is assembled, higher coaxiality between the motor shell and a motor rotor is ensured by utilizing higher connection rigidity between the motor left end cover and the taper shaft of the lifter; but the pre-compaction of the bearing makes the bearing have great rotation resistance when rotating, and in order to solve the problem, the bearing clearance in the left end cover of the motor needs to be readjusted after the assembly of the direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment is completed.
Further, when the motor rotor is installed, the motor rotor is horizontally hoisted by using a crown block and a nylon hoisting belt for assembly; the assembly process is as follows:
s31, horizontally moving a motor rotor by using a crown block, so that a conical shaft of the elevator is inserted into a conical hole of the conical hole shaft, and the conical shaft of the elevator and the conical hole shaft are in a preliminary matching pre-tightening state;
s32, arranging a sizing block at the outer end part of the taper hole shaft, and using a hydraulic impact hammer to impact the sizing block at the outer end part of the taper hole shaft until the taper hole shaft is assembled in place on the taper shaft of the elevator; in the assembly process, the impact force of the hydraulic impact hammer is finally transmitted to the elevator through the taper hole shaft and the elevator taper shaft, and is finally transmitted to the elevator foundation through the elevator;
s33, after the motor rotor is assembled, locking a check bolt between a conical shaft and a conical hole shaft of the elevator, and preventing the conical shaft and the conical hole shaft of the elevator from loosening when being matched in the working process of the permanent magnet low-speed synchronous motor; the motor rotor is coaxial with the elevator taper shaft after being assembled and basically in a horizontal state;
s34, finally, arranging a magnetism isolating sleeve on the outer circumference of the motor rotor, fixing the magnetism isolating sleeve by using a high-temperature adhesive tape, preparing for assembling the motor shell, and preventing the motor rotor and the stator from generating attraction accidents in the assembling process of the motor shell; the magnetic isolation sleeve is fixed by the high-temperature adhesive tape, so that the adhesive tape is prevented from leaving residual adhesive on the surface of the motor rotor, and dust is adsorbed on the surface of the motor rotor to generate dirt.
Furthermore, when the motor casing is installed, a guide steel plate is arranged on the installation basis of the motor casing, and the guide steel plate is used for ensuring that the motor casing does not shake horizontally in the assembly process; the motor shell is lifted by using the crown block and the nylon lifting belt, the lifting height of the motor shell is not more than 0.25mm, namely the motor shell is in a state of just separating from the ground, and the parallelism between the axis of the stator in the inner cavity and the ground is not more than 0.5mm in the lifting process of the motor shell due to the interaction between the assembly datum plane of the motor shell and the ground; in addition, when the motor casing is installed, a steel plate with the thickness of 0.5mm can be paved on the ground, and when the crown block lifts the motor casing, the motor casing is not completely separated from the steel plate, and the crown block drags the motor casing to slide on the steel plate, so that the parallelism between the axis of the stator in the inner cavity of the motor casing and the ground is not more than 0.5mm; the crown block drives the motor shell to slowly penetrate through the motor rotor along the guide steel plate, so that the left end cover of the motor is abutted against the left end face of the motor shell, and the left end cover of the motor is fixedly connected with the motor shell through bolts; after the motor shell is fixedly connected with the left end cover of the motor, the motor shell is fixedly connected with the taper shaft of the elevator, and the motor shell and the taper shaft of the elevator have higher connection rigidity; after the motor shell is assembled, the motor shell and the motor rotor are in a cantilever state, so that the conical shaft of the elevator is bent, the motor shell is inclined along the axial direction, and the aim of adjusting the levelness of the motor shell is to eliminate the bending of the conical shaft of the elevator; when the levelness of the motor casing is adjusted, placing an upper level on a horizontal reference plane on the motor casing, and adjusting the levelness of the motor casing by arranging a sizing block between the motor casing and a foundation; after the levelness adjustment of the motor casing is completed, the motor casing is fixedly connected with the foundation through bolts.
Furthermore, two tapered roller bearings are adopted as a connecting bearing between the right end cover of the motor and the shaft neck at the outer end of the taper hole shaft; the assembly process of the right end cover of the motor is as follows:
s51, fixedly mounting a motor right end cover on the right end face of a motor shell, wherein when the motor right end cover is mounted, a positioning boss on the motor right end cover is matched with a spigot on the right end face of the motor shell, so that coaxiality of a bearing mounting hole axis on the motor right end cover and a motor shell axis is ensured;
s52, mounting the outer sleeve of the inner tapered roller bearing in a bearing hole of a right end cover of the motor;
s53, mounting inner sleeves of the two tapered roller bearings at the shaft neck of the outer end of the taper hole shaft in a manner that large end surfaces are contacted;
s54, installing the outer sleeve of the outer tapered roller bearing in a bearing hole of a right end cover of the motor; because of the structural characteristics of the tapered roller bearing, the assembly of the tapered roller bearing is not affected even though the axes of the inner sleeve and the outer sleeve of the tapered roller bearing are not coincident at the moment; the coaxiality of the inner sleeve axis and the outer sleeve axis of the tapered roller bearing (namely, the coaxiality of a motor rotor and a motor stator) is finally ensured by gradually eliminating the fit clearance of the tapered roller bearing when the connecting bolt between the bearing end cover and the motor right end cover is subsequently locked;
s55, installing a bearing end cover and locking a connecting bolt between the bearing end cover and a right end cover of the motor; the supplementary explanation is: the step height of the pressing bearing sleeve on the bearing end cover on the right end cover of the motor is prepared according to the actually measured depth of the bearing mounting hole of the left end cover of the motor and the actually measured distances of the large ends of the sleeves of the two tapered roller bearings which are arranged back to back and is provided with a negative tolerance; when the connecting bolt between the bearing end cover and the motor left end cover is locked, the fit clearance of the two tapered roller bearings is gradually reduced until the design clearance is finally reached; the size of the design clearance is determined by the negative tolerance of the bearing end cap step height.
Further, the bearing clearance of the left end cover of the motor of the direct-connected suspension type permanent magnet low-speed synchronous mining lifting device needs to be finally adjusted, because: in the installation of the motor left end cover in the step S2, the bearing in the motor left end cover is in a state that the gap is completely eliminated and a certain pre-compression is applied after the installation, if the bearing rotates in the state, the problems of large rotation resistance, serious heat generation and rapid abrasion exist, so that the assembly gap of the bearing needs to be readjusted, and the adjustment process is as follows:
s61, detaching a connecting bolt of a bearing end cover on a left end cover of the motor, knocking the left end cover of the motor by a copper rod, and eliminating partial pre-compression originally applied on the bearing through vibration so as to reduce the heating and abrasion of two tapered roller bearings in the left end cover of the motor in the test operation of the direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment, thereby prolonging the service life of the bearing;
s62, arranging a bearing gap adjusting pad between the bearing end cover and the left end cover of the motor, and locking a connecting bolt of the bearing end cover again; the size of the bearing gap adjusting pad is designed in advance, and after the connecting bolt of the bearing end cover is locked again, the bearing gap of the left end cover of the motor can reach a design value; after the direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment is completely assembled, the assembly gaps of the two tapered roller bearings in the left end cover of the motor can be automatically redistributed along with the axial movement of the bearing inner sleeve on the tapered shaft of the elevator through test operation, so that the designed operation gaps are achieved.
Due to the adoption of the technical scheme, the invention has the following beneficial effects: the invention discloses a field assembly method of a direct-connected suspension type permanent magnet low-speed synchronous mining lifting device, wherein the direct-connected suspension type permanent magnet low-speed synchronous mining lifting device comprises the following components: a hoister and a low-speed permanent magnet synchronous motor; a lifter taper shaft extends from one side end surface of the lifter; a motor rotor is arranged in the low-speed permanent magnet synchronous motor, and a taper hole shaft is arranged in the motor rotor; the elevator taper shaft is matched with the taper hole shaft of the motor rotor, so that the elevator taper shaft is fixedly connected with the motor rotor; the low-speed permanent magnet synchronous motor further comprises a motor shell, a motor left end cover and a motor right end cover, wherein the motor left end cover and the motor right end cover are fixedly arranged at two ends of the motor shell, a motor rotor is coaxially arranged in a stator cavity of the motor shell, and the motor rotor is rotationally connected with the motor left end cover and the motor right end cover; in the field assembly process of the direct-connected suspension type permanent magnet low-speed synchronous mining lifting device, the magnetic isolation sleeve is fixedly arranged on the outer circumference of the motor rotor before the motor shell and the motor rotor are assembled, and the magnetic attraction between the motor rotor and the stator is greatly reduced through the magnetic isolation sleeve, so that when the mining lifting machine is assembled on site, even if necessary auxiliary tools for limiting the assembly of the motor rotor and the stator are absent, the motor rotor and the stator can be prevented from being attracted together, the technical obstacle that the existing high-power direct-connected suspension type permanent magnet low-speed synchronous mining lifting device cannot be assembled on site is overcome, and the popularization and the application of the high-power direct-connected suspension type permanent magnet low-speed synchronous mining lifting device are realized.
Drawings
FIG. 1 is a schematic view of the appearance of a field installation completion state of a direct-connected suspension type permanent magnet low-speed synchronous mining lifting device;
FIG. 2 is a schematic view of the appearance of a hoist;
FIG. 3 is a schematic diagram of the assembly structure of a low-speed permanent magnet synchronous motor;
FIG. 4 is a schematic diagram of a cross-sectional structure of a motor housing;
FIG. 5 is a schematic diagram of a cross-sectional structure of a motor rotor;
FIG. 6 is a schematic diagram of a cross-sectional structure of a left end cover of the motor;
FIG. 7 is a schematic diagram of a cross-sectional structure of a right end cover of the motor;
FIG. 8 is a schematic diagram of a field installation completion status of the elevator;
FIG. 9 is a schematic view of the motor left end cap in-situ installation completion;
FIG. 10 is a schematic view of a field installation completion of the motor rotor;
FIG. 11 is a schematic view showing a state after a magnetism isolating sleeve is fixedly arranged on the outer circumference of a motor rotor;
FIG. 12 is a schematic view of a motor housing in-situ installation completion;
FIG. 13 is a schematic drawing of an extracted magnetic shield;
fig. 14 is a schematic view of a field installation completion state of the low-speed permanent magnet synchronous motor.
In the figure: 1. a hoist; 1.1, a conical shaft of a lifter; 2. a low-speed permanent magnet synchronous motor; 2.1, a motor casing; 2.2, a motor rotor; 2.3, a motor left end cover; 2.4, a right end cover of the motor; 3. a magnetism isolating sleeve.
Detailed Description
The invention will be explained in more detail by the following examples, the purpose of which is to protect all technical improvements within the scope of the invention.
A method for on-site assembly of a direct-connected suspended permanent magnet low-speed synchronous mining lifting device, wherein the direct-connected suspended permanent magnet low-speed synchronous mining lifting device comprises the following steps: a lifter 1 and a low-speed permanent magnet synchronous motor 2; a lifter taper shaft 1.1 extends from one side end surface of the lifter 1; a motor rotor 2.2 is arranged in the low-speed permanent magnet synchronous motor 2, and a taper hole shaft is arranged in the motor rotor 2.2; the elevator taper shaft 1.1 is matched with a taper hole shaft of the motor rotor 2.2, so that the elevator taper shaft 1.1 is fixedly connected with the motor rotor 2.2; the low-speed permanent magnet synchronous motor 2 also comprises a motor shell 2.1, a motor left end cover 2.3 and a motor right end cover 2.4, wherein the motor left end cover 2.3 and the motor right end cover 2.4 are fixedly arranged at two ends of the motor shell 2.1, a motor rotor 2.2 is coaxially arranged in a stator cavity of the motor shell 2.1, and the motor rotor 2.2 is rotationally connected with the motor left end cover 2.3 and the motor right end cover 2.4;
the field assembly method of the direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment comprises the following steps of:
s1, mounting a lifter 1: in the process of installing the elevator 1, adjusting the horizontal state of the elevator taper shaft 1.1 by arranging a sizing block between the elevator and a foundation; after the horizontal state of the elevator taper shaft 1.1 is adjusted, fixedly connecting the elevator 1 with a foundation through foundation bolts and nuts;
s2, mounting a motor left end cover 2.3: the connecting bearing between the motor left end cover 2.3 and the elevator taper shaft 1.1 adopts two tapered roller bearings; the bearing end cover which is matched with the motor left end cover 2.3 is pressed against the step height of the bearing sleeve, and is matched according to the measured depth of the bearing mounting hole of the motor left end cover 2.3 and the measured distances of the large ends of the sleeves of the two tapered roller bearings which are arranged back to back; the assembly process of the motor left end cover 2.3 is as follows:
s21, installing two tapered roller bearings in bearing installation holes of a left end cover (2.3) of the motor in a manner that large end faces of the inner sleeves are contacted; installing a bearing end cover, screwing a connecting bolt between the bearing end cover and a left end cover (2.3) of the motor, and keeping the connecting bolt in a loose state;
s22, assembling a motor left end cover (2.3) which is assembled by a bearing on a lifter taper shaft (1.1), fixing a bearing inner sleeve on the lifter taper shaft (1.1) through a bearing lock nut, and locking a connecting bolt between the bearing end cover and the motor left end cover (2.3);
s3, mounting a motor rotor 2.2: when the motor rotor 2.2 is installed, the motor rotor 2.2 is horizontally hoisted by using a crown block and a nylon hoisting belt; the assembly process is as follows:
s31, moving the motor rotor 2.2 to enable the elevator taper shaft 1.1 to be inserted into a taper hole of the taper hole shaft;
s32, arranging a sizing block at the outer end part of the taper hole shaft, and using a hydraulic impact hammer to impact the sizing block at the outer end part of the taper hole shaft until the taper hole shaft is assembled in place on the elevator taper shaft 1.1;
s33, locking a check bolt 4;
s34, arranging a magnetism isolating sleeve 3 on the outer circumference of the motor rotor 2.2, and fixing the magnetism isolating sleeve 3 by using a high-temperature adhesive tape;
s4, mounting a motor shell 2.1: when the motor casing 2.1 is installed, a guide steel plate is arranged on the installation basis of the motor casing 2.1; lifting the motor casing 2.1 by using a crown block and a nylon lifting belt, wherein the lifting height of the motor casing 2.1 is not more than 0.25mm; then, using a crown block to drive the motor shell 2.1 to slowly pass through the motor rotor 2.2 along a guide steel plate, enabling the motor left end cover 2.3 to abut against the left end face of the motor shell 2.1, and fixedly connecting the motor left end cover 2.3 with the motor shell 2.1 through bolts;
when the levelness of the motor casing (2.1) is adjusted, placing an upper level on a horizontal reference plane on the motor casing (2.1), and adjusting the levelness of the motor casing (2.1) by arranging a sizing block between the motor casing (2.1) and a foundation; after the levelness of the motor casing (2.1) is adjusted, the motor casing (2.1) is fixedly connected with a foundation through bolts; finally, extracting the magnetism isolating sleeve 3 on the outer circumference of the motor rotor 2.2;
s5, mounting a right end cover 2.4 of the motor: the connecting bearing between the right end cover 2.4 of the motor and the shaft neck of the outer end of the taper hole shaft adopts two tapered roller bearings; the bearing end cover which is matched with the motor right end cover 2.4 is pressed against the step height of the bearing sleeve, and is matched according to the measured depth of the bearing mounting hole of the motor right end cover 2.4 and the measured distances of the large ends of the sleeves of the two tapered roller bearings which are arranged back to back; the assembly process of the right end cover 2.4 of the motor is as follows:
s51, fixedly mounting a right end cover 2.4 of the motor on the right end face of the motor casing 2.1;
s52, mounting the outer sleeve of the inner tapered roller bearing in a bearing hole of the right end cover 2.4 of the motor;
s53, mounting inner sleeves of the two tapered roller bearings at the shaft neck of the outer end of the taper hole shaft in a manner that large end surfaces are contacted;
s54, mounting the outer sleeve of the outer tapered roller bearing in a bearing hole of the right end cover 2.4 of the motor;
s55, installing a bearing end cover and locking a connecting bolt between the bearing end cover and the right end cover 2.4 of the motor.
S6, final adjustment of bearing clearance at the left end cover (2.3) of the motor: the adjusting process is as follows:
s61, loosening and detaching a connecting bolt of a bearing end cover on the motor left end cover (2.3), and knocking the motor left end cover (2.3) by using a copper rod;
s62, setting a bearing clearance adjusting pad between the bearing end cover and the motor left end cover (2.3), and locking a connecting bolt of the bearing end cover again.
The invention is not described in detail in the prior art.
Claims (9)
1. A method for on-site assembly of a direct-connected suspended permanent magnet low-speed synchronous mining lifting device, wherein the direct-connected suspended permanent magnet low-speed synchronous mining lifting device comprises the following steps: a lifter (1) and a low-speed permanent magnet synchronous motor (2); a lifter taper shaft (1.1) extends from one side end surface of the lifter (1); a motor rotor (2.2) is arranged in the low-speed permanent magnet synchronous motor (2), and a taper hole shaft is arranged in the motor rotor (2.2); the elevator taper shaft (1.1) is matched with a taper hole shaft of the motor rotor (2.2), so that the elevator taper shaft (1.1) is fixedly connected with the motor rotor (2.2); the low-speed permanent magnet synchronous motor (2) further comprises a motor shell (2.1), a motor left end cover (2.3) and a motor right end cover (2.4), wherein the motor left end cover (2.3) and the motor right end cover (2.4) are fixedly arranged at two ends of the motor shell (2.1), a motor rotor (2.2) is coaxially arranged in a stator cavity of the motor shell (2.1), and the motor rotor (2.2) is rotationally connected with the motor left end cover (2.3) and the motor right end cover (2.4); the method is characterized in that: before the motor shell (2.1) and the motor rotor (2.2) are assembled, a magnetism isolating sleeve (3) is fixedly arranged on the outer circumference of the motor rotor (2.2);
the field assembly of the direct-connected suspension type permanent magnet low-speed synchronous mining lifting equipment comprises the following steps of:
s1, mounting a lifter (1): installing and fixing the hoister (1) on a processed basis; the elevator taper shaft (1.1) is in a horizontal state;
s2, mounting a motor left end cover (2.3): the motor left end cover (2.3) is assembled on a lifter taper shaft (1.1) through a bearing, and a bearing end cover is assembled and the adjustment of a bearing gap is completed;
s3, mounting a motor rotor (2.2): the motor rotor (2.2) is assembled on the elevator taper shaft (1.1) through the matching of the elevator taper shaft (1.1) and the taper hole shaft of the motor rotor (2.2), and the locking bolt (4) is locked; a magnetism isolating sleeve (3) is fixedly arranged on the outer circumference of the motor rotor (2.2);
s4, mounting a motor shell (2.1): penetrating the motor shell (2.1) through the motor rotor (2.2), enabling the left end cover (2.3) of the motor to be in contact with the left end face of the motor shell (2.1), and fixedly connecting the left end cover (2.3) of the motor with the motor shell (2.1) through bolts; adjusting the levelness of the motor shell (2.1), and installing and fixing the motor shell (2.1) on a processed basis; then the magnetism isolating sleeve (3) on the outer circumference of the motor rotor (2.2) is pulled out;
s5, mounting a right end cover (2.4) of the motor: firstly, fixedly connecting a right end cover (2.4) of a motor to the right end surface of a motor shell (2.1), then assembling a bearing between a taper hole shaft and the right end cover (2.4) of the motor, and finally assembling a bearing end cover and finishing adjustment of a bearing gap;
s6, final adjustment of bearing clearance of a left end cover (2.3) of the motor: and loosening the connecting bolt of the bearing end cover on the motor left end cover (2.3), and setting a bearing clearance adjusting pad between the bearing end cover and the motor left end cover (2.3) to lock the connecting bolt of the bearing end cover again.
2. The method for on-site assembly of the direct-connected suspended permanent magnet low-speed synchronous mining lifting equipment, which is characterized in that: in the process of installing the elevator (1), adjusting the horizontal state of the elevator taper shaft (1.1) by arranging a sizing block between the elevator and a foundation; after the horizontal state of the elevator taper shaft (1.1) is adjusted, the elevator (1) is fixedly connected with a foundation through foundation bolts and nuts.
3. The method for on-site assembly of the direct-connected suspended permanent magnet low-speed synchronous mining lifting equipment, which is characterized in that: the connecting bearing between the left end cover (2.3) of the motor and the elevator taper shaft (1.1) adopts two tapered roller bearings; the assembly process of the left end cover (2.3) of the motor is as follows:
s21, installing two tapered roller bearings in bearing installation holes of a left end cover (2.3) of the motor in a manner that large end faces of the inner sleeves are contacted; installing a bearing end cover, screwing a connecting bolt between the bearing end cover and a left end cover (2.3) of the motor, and keeping the connecting bolt in a loose state;
s22, assembling a motor left end cover (2.3) which is assembled with a bearing on a lifter taper shaft (1.1), and fixing a bearing inner sleeve on the lifter taper shaft (1.1) through a bearing lock nut; and locking a connecting bolt between the bearing end cover and the left end cover (2.3) of the motor.
4. The method for on-site assembly of the direct-connected suspended permanent magnet low-speed synchronous mining lifting equipment according to claim 3, which is characterized in that: the bearing end cover which is matched with the motor left end cover (2.3) is pressed against the step height of the bearing sleeve, and the bearing end cover is matched according to the actually measured depth of the bearing mounting hole of the motor left end cover (2.3) and the actually measured distances of the sleeve large ends of the two tapered roller bearings which are arranged back to back.
5. The method for on-site assembly of the direct-connected suspended permanent magnet low-speed synchronous mining lifting equipment, which is characterized in that: when the motor rotor (2.2) is installed, the motor rotor (2.2) is horizontally hoisted by using a crown block and a nylon hoisting belt; the assembly process is as follows:
s31, moving a motor rotor (2.2) to enable a conical shaft (1.1) of the elevator to be inserted into a conical hole of the conical hole shaft;
s32, arranging a sizing block at the outer end part of the taper hole shaft, and using a hydraulic impact hammer to impact the sizing block at the outer end part of the taper hole shaft until the taper hole shaft is assembled in place on a taper shaft (1.1) of the elevator;
s33, locking a check bolt (4);
s34, arranging a magnetism isolating sleeve (3) on the outer circumference of the motor rotor (2.2), and fixing the magnetism isolating sleeve (3) by using a high-temperature adhesive tape.
6. The method for on-site assembly of the direct-connected suspended permanent magnet low-speed synchronous mining lifting equipment, which is characterized in that: when the motor casing (2.1) is installed, a guide steel plate is fixedly arranged on the installation basis of the motor casing (2.1); lifting the motor shell (2.1) by using a crown block and a nylon lifting belt, wherein the lifting height of the motor shell (2.1) is not more than 0.25mm; then, the crown block is used for driving the motor shell (2.1) to slowly penetrate the motor shell (2.1) through the motor rotor (2.2) along the guide steel plate, so that the left end cover (2.3) of the motor is abutted against the left end face of the motor shell (2.1), and the left end cover (2.3) of the motor is fixedly connected with the motor shell (2.1) through bolts;
when the levelness of the motor casing (2.1) is adjusted, placing an upper level on a horizontal reference plane on the motor casing (2.1), and adjusting the levelness of the motor casing (2.1) by arranging a sizing block between the motor casing (2.1) and a foundation; after the levelness adjustment of the motor casing (2.1) is completed, the motor casing (2.1) is fixedly connected with the foundation through bolts.
7. The method for on-site assembly of the direct-connected suspended permanent magnet low-speed synchronous mining lifting equipment, which is characterized in that: the connecting bearing between the right end cover (2.4) of the motor and the shaft neck at the outer end of the taper hole shaft adopts two tapered roller bearings; the assembly process of the right end cover (2.4) of the motor is as follows:
s51, fixedly mounting a right end cover (2.4) of the motor on the right end face of the motor shell (2.1);
s52, mounting the outer sleeve of the inner tapered roller bearing in a bearing hole of a right end cover (2.4) of the motor;
s53, mounting inner sleeves of the two tapered roller bearings at the shaft neck of the outer end of the taper hole shaft in a manner that large end surfaces are contacted;
s54, mounting the outer sleeve of the outer tapered roller bearing in a bearing hole of a right end cover (2.4) of the motor;
s55, installing a bearing end cover and locking a connecting bolt between the bearing end cover and a right end cover (2.4) of the motor.
8. The method for on-site assembly of the direct-connected suspended permanent magnet low-speed synchronous mining lifting equipment, according to claim 7, is characterized in that: the bearing end cover which is matched with the motor right end cover (2.4) is pressed against the step height of the bearing sleeve, and is matched according to the actually measured depth of the bearing mounting hole of the motor right end cover (2.4) and the actually measured distances of the sleeve large ends of the two tapered roller bearings which are arranged back to back.
9. The method for on-site assembly of the direct-connected suspended permanent magnet low-speed synchronous mining lifting equipment, which is characterized in that: the bearing clearance in the left end cover (2.3) of the motor of the direct-connected suspension type permanent magnet low-speed synchronous mining lifting device is required to be finally adjusted, and the adjustment process is as follows:
s61, detaching a connecting bolt of a bearing end cover on the motor left end cover (2.3), and knocking the motor left end cover (2.3) by using a copper rod;
s62, setting a bearing clearance adjusting pad between the bearing end cover and the motor left end cover (2.3), and locking a connecting bolt of the bearing end cover again.
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| CN202111348304.3A CN114006509B (en) | 2021-11-15 | 2021-11-15 | On-site assembly method of direct-connection suspension type permanent magnet low-speed synchronous mining lifting equipment |
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| CN202111348304.3A CN114006509B (en) | 2021-11-15 | 2021-11-15 | On-site assembly method of direct-connection suspension type permanent magnet low-speed synchronous mining lifting equipment |
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| CN101662195A (en) * | 2009-09-18 | 2010-03-03 | 大连伯顿冠力电机有限公司 | Permanent magnet synchronous motor for hoisting mechanism of direct-drive crane |
| CN101707414A (en) * | 2009-11-27 | 2010-05-12 | 大连伯顿冠力电机有限公司 | Direct-drive type permanent magnet synchronous motor dedicated to mine hoister |
| WO2019161624A1 (en) * | 2018-02-26 | 2019-08-29 | 东南大学 | Asymmetric dual three-phase arc permanent magnet synchronous motor |
| CN110943560A (en) * | 2019-12-24 | 2020-03-31 | 太原理工大学 | Permanent magnet outer rotor elevator |
| CN212875500U (en) * | 2020-08-20 | 2021-04-02 | 重庆赛力盟电机有限责任公司 | Direct-drive permanent magnet motor rotor splicing type magnetic isolation structure |
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2021
- 2021-11-15 CN CN202111348304.3A patent/CN114006509B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101662195A (en) * | 2009-09-18 | 2010-03-03 | 大连伯顿冠力电机有限公司 | Permanent magnet synchronous motor for hoisting mechanism of direct-drive crane |
| CN101707414A (en) * | 2009-11-27 | 2010-05-12 | 大连伯顿冠力电机有限公司 | Direct-drive type permanent magnet synchronous motor dedicated to mine hoister |
| WO2019161624A1 (en) * | 2018-02-26 | 2019-08-29 | 东南大学 | Asymmetric dual three-phase arc permanent magnet synchronous motor |
| CN110943560A (en) * | 2019-12-24 | 2020-03-31 | 太原理工大学 | Permanent magnet outer rotor elevator |
| CN212875500U (en) * | 2020-08-20 | 2021-04-02 | 重庆赛力盟电机有限责任公司 | Direct-drive permanent magnet motor rotor splicing type magnetic isolation structure |
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