CN114552852B - Large-scale internal-external mixed double-air-cooling and water-cooling permanent magnet synchronous motor - Google Patents
Large-scale internal-external mixed double-air-cooling and water-cooling permanent magnet synchronous motor Download PDFInfo
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- CN114552852B CN114552852B CN202210210568.0A CN202210210568A CN114552852B CN 114552852 B CN114552852 B CN 114552852B CN 202210210568 A CN202210210568 A CN 202210210568A CN 114552852 B CN114552852 B CN 114552852B
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- 238000001816 cooling Methods 0.000 title claims abstract description 35
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000498 cooling water Substances 0.000 claims abstract description 29
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000003466 welding Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000003111 delayed effect Effects 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 9
- 230000006872 improvement Effects 0.000 description 9
- 230000006698 induction Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The invention discloses a large-scale internal and external mixed double air-cooling and water-cooling permanent magnet synchronous motor, which comprises a machine base, a stator, a rotor and a main shaft, wherein a cooling water channel is arranged in the machine base, the main shaft is a hollow shaft, the rear end of the main shaft is provided with a connecting flange, the inner connecting flange of the main shaft is connected with a shaft sleeve through a ball cage universal coupling, and the shaft sleeve is used for being connected with a rotating shaft of a slurry pump; permanent magnet steel is inlaid on the rotor core, fans are arranged at the front end and the rear end of the rotor support, a plurality of air inlet holes are formed in the upper portion of the front end cover, an air guide cover is arranged at the corresponding position of the air inlet holes, a centrifugal fan is arranged above the air guide cover, and a plurality of air outlet holes are formed in the rear end cover. The engine base adopts a steel welding cylinder structure, so that the overall rigidity is good, and the vibration is low; the cooling water channel, the centrifugal fan and the two fans are arranged to form water cooling and internal and external mixed double air cooling circulation, so that the temperature rise of the motor is effectively controlled; the shaft sleeve and the rotor synchronously rotate, so that a vibration source of the motor is reduced, the running stability of the motor is improved, and the purposes of low speed, large torque, energy conservation and high efficiency are achieved.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a large-scale internal and external mixed double-air-cooling water-cooling permanent magnet synchronous motor for petroleum and natural gas drilling production.
Background
The traditional slurry pump generally adopts an induction asynchronous motor as a driving motor, an excitation magnetic field of the induction asynchronous motor is provided by a stator winding, a short-distance distributed winding is required to ensure the sine degree of the excitation magnetic field, and the induction asynchronous motor is difficult to be made into multi-pole low-speed. Therefore, the low speed is realized by a method of frequently matching mechanical speed reduction. The mechanical transmission device can lead to the problems of long transmission chain, low efficiency, complex structure and great operation and maintenance workload. In order to meet the driving requirement of the maximum load, an asynchronous motor with larger rated power is often selected, so that the load rate of most motors is 50% -80%, the phenomenon of 'large maraca' exists, the power factor and the efficiency are lower, and electric energy is wasted. For this reason, a scheme of replacing an induction asynchronous motor and a belt pulley mechanism with a permanent magnet low-speed high-torque motor needs to be developed as soon as possible. On the basis of meeting the motor performance, the motor volume is reduced, the cost is reduced, and the effects of perfectly solving the two core problems of low-speed large torque, energy conservation and high efficiency are achieved.
Disclosure of Invention
In order to solve the problems that the load rate of the existing slurry pump driving motor is 50% -80%, the phenomenon of 'large maraca' exists, the power factor and the efficiency are low, and electric energy is wasted, the invention provides a large internal and external mixed double air cooling and water cooling permanent magnet synchronous motor, the motor is small in size and low in cost, the effect of perfectly solving two core problems of low speed, large torque, energy saving and high efficiency is achieved, the motor is suitable for a compact high-energy density motor, and the purpose of high efficiency and low consumption is achieved.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the large-scale internal and external mixed double-air-cooling and water-cooling permanent magnet synchronous motor comprises a machine base, a stator sleeved in the machine base, a rotor sleeved in the stator and a main shaft fixedly connected with the rotor, and is characterized in that a cooling water channel is arranged in the outer side wall of the machine base, two water inlet and outlet pipes are arranged on the outer side wall of the cooling water channel and are respectively connected with a water outlet and a water inlet of an external water cooling system to form a water cooling loop, the inside of the motor can be cooled by water, the main shaft is a hollow shaft, a ball cage universal coupling is sleeved in the center of the inside of the main shaft, a connecting flange is arranged at the rear end of the ball cage universal coupling, the rear end of the ball cage universal coupling is fixedly connected with the front end of the connecting flange, and a shaft sleeve is fixedly connected with the front end of the ball cage universal coupling and is used for being connected with a rotating shaft of a slurry pump;
the rotor comprises a rotor core and a rotor bracket, wherein a plurality of permanent magnet steels are embedded on the rotor core, the rotor core is fixedly connected with the rotor bracket, the rotor bracket is fixedly connected with the middle of the main shaft through a first flat key, and a front fan and a rear fan are respectively arranged on the front end face and the rear end face of the rotor bracket;
the front end and the rear end of the machine base are respectively provided with a front end cover and a rear end cover, the inner hole of the front end cover is connected with the outer circular surface of the main shaft through a front bearing assembly, the inner hole of the rear end cover is connected with the outer circular surface of the main shaft through a rear bearing assembly, the upper part of the front end cover is provided with a plurality of air inlets uniformly distributed in circumference, the corresponding position of the air inlets on the upper part of the front side surface of the front end cover is provided with an air guide cover, a centrifugal fan is arranged above the air guide cover, the front end surface of the front end cover is provided with a step-shaped flange, and the step-shaped flange is sleeved on the outer side of the shaft sleeve and is used for being connected with a slurry pump bearing seat; the rear end cover is provided with a plurality of air outlet holes uniformly distributed on the circumference;
the centrifugal fan sucks external cold air and throws the air into the motor through the air guide cover and the air inlet hole, so that the air pressure in the machine base is increased, the rotor rotates simultaneously, the front fan and the rear fan are driven to synchronously rotate, the air in the machine base is stirred, the entered cold air and hot air are mixed in a flowing mode, the internal temperature is uniform, the cooling water channel in the machine base is matched with the hot air in the machine base to carry out rapid heat exchange, the cooling speed is further increased, the air pressure is increased, and the air in the machine base is forced to be discharged from the air outlet hole in the rear end cover, so that internal and external mixing double air cooling circulation is formed.
As a further improvement of the technology, the stand adopts a steel welding cylindrical structure and comprises an inner cylinder, an outer cylinder, an end sealing ring and water inlet and outlet ports, wherein the inner cylinder is sleeved in the outer cylinder, the end sealing ring is provided with two pieces which are respectively welded, sealed and fixedly connected with the left end and the right end of the inner cylinder and the outer cylinder, the cooling water channel is arranged between the inner cylinder and the outer cylinder, the water inlet and outlet ports are provided with two pieces, and the two water inlet and outlet ports are arranged on the side wall of the front side of the outer cylinder in a side-by-side separated mode and are communicated with the cooling water channel.
As a further improvement of the technology, the outer side wall of the inner cylinder is provided with N first water channel ribs which are uniformly distributed circumferentially and parallel to the axis and N second water channel ribs which are uniformly distributed circumferentially and parallel to the axis, N is a natural number greater than 1, one end of each first water channel rib is fixedly connected with the inner end surface of the front side end seal ring, a gap of 50-80 mm is reserved between the other end of each first water channel rib and the inner end surface of the rear side end seal ring, one end of each second water channel rib is fixedly connected with the inner end surface of the rear side end seal ring, a gap of 50-80 mm is reserved between the other end of each second water channel rib and the inner end surface of the front side end seal ring, and the first water channel ribs and the second water channel ribs are staggered, so that an S-shaped roundabout cooling water channel is formed;
two third water channel ribs parallel to the axis are uniformly distributed between every two adjacent first water channel ribs and second water channel ribs on the outer side wall of the inner cylinder, a gap of 50-80 mm is reserved between two ends of each third water channel rib and the inner end face of the corresponding side end sealing ring, a plurality of water channel interlayers are formed in the cooling water channel by the third water channel ribs, the water flow speed is delayed, heat exchange between cold water and hot air in the engine base is facilitated, and heat dissipation efficiency is improved.
As a further improvement of the technology, the outer shape of the wind scooper is in a fan shape, the upper end of the wind scooper is provided with a ventilation opening which is communicated with the centrifugal fan, the right side of the wind scooper is provided with an opening, the right side end face of the wind scooper is fixedly connected with the front end cover, and the air inlet hole is arranged in the opening on the right side of the wind scooper.
As a further improvement of the technology, the air inlet holes are provided with two groups, one group is provided with a plurality of first air inlet holes which are uniformly distributed in the circumference, the other group is provided with a plurality of second air inlet holes which are uniformly distributed in the circumference, and the second air inlet holes are arranged on the inner side of the first air inlet holes and staggered with the first air inlet holes.
As a further improvement of the technology, two groups of air outlets are arranged, one group is provided with a plurality of first air outlets which are uniformly distributed in the circumference, the other group is provided with a plurality of second air outlets which are uniformly distributed in the circumference, and the second air outlets are arranged on the inner side of the first air outlets and staggered with the first air outlets.
As a further improvement of the technology, the front bearing assembly comprises a front bearing seat, a front bearing, a front inner bearing sleeve, a first labyrinth oil seal and a first oil slinger, wherein the front bearing seat is sleeved between the outer circular surface of the main shaft and the inner hole wall of the front end cover, the outer circular surface of the main shaft is provided with a flange which is fixedly connected with the front end cover, the front bearing is arranged in the front bearing seat, the front end of the outer circular surface of the main shaft is sleeved with the first labyrinth oil seal at the matching position of the front bearing seat, the front inner bearing sleeve is arranged at the rear end of the front bearing, and the first oil slinger is arranged at the matching position of the rear end of the front bearing and the front inner bearing sleeve;
the rear bearing assembly comprises a rear bearing seat, a rear bearing, a rear inner bearing sleeve, a second labyrinth oil seal and a second oil slinger, wherein the rear bearing seat is sleeved between the outer circular surface of the main shaft and the inner hole wall of the rear end cover, the outer circular surface of the main shaft is provided with a flange and fixedly connected with the rear end cover, the rear bearing is arranged in the rear bearing seat, the rear end of the outer circular surface of the main shaft is sleeved with the second labyrinth oil seal at the matching position of the rear bearing seat, the rear inner bearing sleeve is arranged at the front end of the rear bearing, and the second oil slinger is arranged at the matching position of the front end of the rear bearing and the rear inner bearing sleeve.
As a further improvement of the technology, the upper side and the lower side of the front end face of the flange plate of the connecting flange are symmetrically provided with first key grooves, the positions, corresponding to the first key grooves, on the rear end face of the main shaft are respectively provided with second key grooves, second flat keys are arranged in the first key grooves and the corresponding second key grooves, a plurality of bolt mounting holes which are uniformly distributed in circumference are arranged on the flange plate of the connecting flange, the bolt mounting holes are staggered with the first key grooves, the positions, corresponding to the bolt mounting holes, on the rear end face of the main shaft are respectively provided with an internal threaded hole which is matched with the bolt mounting holes, and the flange plate of the connecting flange is connected with the main shaft through the second flat keys and is fixedly connected with a plurality of bolts.
As a further improvement of the technology, the rear end of the connecting flange is fixedly connected with a coaxial small shaft, a rotary transformer is arranged on the outer circular surface of the small shaft, and the rotary transformer is used for measuring the speed to realize closed-loop control; the rotary transformer is provided with a first rain cover, the first rain cover is provided with an aviation plug connector, and a protective cover is arranged outside the aviation plug connector.
As a further improvement of the technology, a second rain cover is arranged on the outer side of the rear end cover.
Compared with the prior art, the invention has the beneficial effects that: 1) The machine base adopts a steel welding cylinder structure, so that the whole rigidity is good, and the vibration is low; 2) A water cooling loop is formed by arranging a cooling water channel, and cooling water exchanges heat with hot air in the engine base through the inner side wall of the engine base, so that heat in the engine base is taken away; through setting the centrifugal fan, the front end cover air inlet hole, the front fan, the rear fan and the rear end cover air outlet hole, the front end cover is enabled to be air-in, the rear end cover is enabled to be air-out, internal and external mixed double air cooling circulation is formed, and the air path is enabled to be in effective contact with a heating component of the motor, so that the temperature rise of the motor is effectively controlled; 3) Through setting up hollow shaft, flange, ball cage universal joint and axle sleeve, the rotor rotates and can drive axle sleeve synchronous rotation, the axle sleeve is connected with the slush pump main shaft, thereby can directly drive the slush pump main shaft and rotate, mechanical structures such as current asynchronous motor's belt or chain drive have been saved, simple structure, the security is high, the vibration source of motor has been reduced, the motor moving stationarity has been promoted, the effect of two big core problems of low-speed big moment of torsion and energy-conservation high efficiency has been reached perfect solution, be applicable to compact high energy density motor, reach the purpose of high-efficient low consumption.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the internal structure of a motor according to an embodiment of the present invention;
FIG. 3 is a schematic view of a frame structure according to an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of the inner cylinder, end seal ring and cooling water channel of the engine base according to the embodiment of the invention;
FIG. 5 is a schematic view of the front end cover air inlet and air guide housing;
FIG. 6 is a schematic view of the structure of the air outlet hole of the rear end cover;
FIG. 7 is a right side view of the attachment flange;
fig. 8 is a cross-sectional view A-A of fig. 7.
Fig. 9 is a right side view of the spindle.
In the figure: 1. centrifugal fan, 2, front end cover, 201, first air inlet hole, 202, second air inlet hole, 3, base, 301, outer cylinder, 302, inner cylinder, 3021, first water channel rib, 3022, second water channel rib, 3023, third water channel rib, 303, end seal ring, 304, water inlet and outlet pipe, 305, cooling water channel, 4, stator, 5, rotor, 6, front fan, 7, rotor support, 8, rear fan, 9, rear end cover, 901, first air outlet hole, 902, second air outlet hole, 10, front bearing block, 11, front inner bearing sleeve, 12, front bearing, 13, first oil slinger, 14, first labyrinth seal, 15, rear bearing block, 16, rear inner bearing housing, 17, rear bearing, 18, second oil slinger, 19, second labyrinth seal, 20, main shaft, 2001, first keyway, 2002, internally threaded hole, 21, first flat key, 22, bolt, 23, flange, 2301, second keyway, 2302, bolt mounting hole, 24, ball cage universal coupling, 25, second flat key, 26, shaft sleeve, 27, stepped flange, 28, small shaft, 29, rotary transformer, 30, air plug connector, 31, air guide cover, 32, second rain cover, 33, first rain cover, 34, protective cover, 35, mud pump bearing seat, 36, mud pump spindle.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and 2, the embodiment of the invention comprises a machine base 3, a stator 4 sleeved in the machine base 3, a rotor 5 sleeved in the stator 4 and a main shaft 20 fixedly connected with the rotor 5, wherein a cooling water channel 305 is arranged in the outer side wall of the machine base 3, two water inlet and outlet pipes 304 are respectively connected with a water outlet and a water inlet of an external water cooling system to form a water cooling loop, the inside of a motor can be cooled by water, the main shaft 20 is a hollow shaft, a ball cage universal coupler 24 is sleeved in the center of the inside of the main shaft 20, a connecting flange 23 is arranged at the rear end of the ball cage universal coupler 24, the rear end of the ball cage universal coupler is fixedly connected with the front end of the connecting flange 23, a shaft sleeve 26 is fixedly connected with the front end of the ball cage universal coupler, and the shaft sleeve 26 is used for being connected with a slurry pump rotating shaft 36;
the rotor 5 comprises a rotor core and a rotor bracket 7, a plurality of permanent magnet steels are embedded on the rotor core, the rotor core is fixedly connected with the rotor bracket 7, the rotor bracket 7 is fixedly connected with the middle of the main shaft 20 through a first flat key 21, and a front fan 6 and a rear fan 8 are respectively arranged on the front end face and the rear end face of the rotor bracket 7;
the front end and the rear end of the machine base 3 are respectively provided with a front end cover 2 and a rear end cover 9, the inner hole of the front end cover 2 is connected with the outer circular surface of the main shaft 20 through a front bearing assembly, the inner hole of the rear end cover 9 is connected with the outer circular surface of the main shaft 20 through a rear bearing assembly, the upper part of the front end cover 2 is provided with a plurality of circumferentially uniformly distributed air inlet holes, the corresponding position of the air inlet hole at the upper part of the front side surface of the front end cover 2 is provided with an air guide cover 31, a centrifugal fan 1 is arranged above the air guide cover 31, the front end surface of the front end cover 2 is provided with a step-shaped flange 27, and the step-shaped flange 27 is sleeved on the outer side of the shaft sleeve 26 and is used for being connected with a slurry pump bearing seat 35; the rear end cover 9 is provided with a plurality of air outlet holes uniformly distributed on the circumference;
according to the centrifugal fan 1 disclosed by the invention, external cold air is sucked into the motor through the air guide cover 31 and the air inlet hole, so that the air pressure in the motor base 3 is increased, the rotor 5 rotates to drive the front fan 6 and the rear fan 8 to synchronously rotate, the air in the motor base 3 is mixed, the entered cold air and hot air are subjected to flow mixing, so that the temperature of the internal air is uniform, meanwhile, the cooling water in the cooling water channel 305 is matched with the cooling water channel 305 in the motor base 3 to perform rapid heat exchange with the hot air in the motor base 3 through the inner side wall of the motor base 3, the cold water in the cooling water channel 305 is changed into hot water to be discharged from the water inlet and outlet pipe 304, the heat is taken away, the internal cooling speed is accelerated, the air pressure in the motor base 3 is increased, the air in the motor base 3 is forced to be discharged from the air outlet hole on the rear end cover 9, and thus internal and external mixed double circulation is formed, the air path is effectively contacted with the heating part of the motor, and the temperature rise of the motor is effectively controlled.
As shown in fig. 3 and 4, the stand 3 adopts a steel welding cylindrical structure, and comprises an inner cylinder 302, an outer cylinder 301, an end sealing ring 303 and a water inlet and outlet 304, wherein the inner cylinder 302 is sleeved in the outer cylinder 301, the end sealing ring 303 is provided with two pieces, the two pieces are respectively welded, sealed and fixedly connected to the left end and the right end of the inner cylinder 302 and the outer cylinder 301, a cooling water channel 305 is arranged between the inner cylinder 302 and the outer cylinder 301, the water inlet and outlet 304 is provided with two pieces, the two pieces of water inlet and outlet 304 are arranged on the side wall of the front side of the outer cylinder 301 in a spaced manner, and the two pieces of water inlet and outlet 304 are communicated with the cooling water channel 305.
As shown in fig. 4, 20 first water channel ribs 3021 which are uniformly distributed circumferentially and parallel to the axis and 20 second water channel ribs 3022 which are uniformly distributed circumferentially and parallel to the axis are arranged on the outer side wall of the inner cylinder 302, one end of the first water channel rib 3021 is fixedly connected with the inner end surface of the front side end sealing ring 303, a gap of 50-80 mm is reserved between the other end of the first water channel rib 3021 and the inner end surface of the rear side end sealing ring 303, one end of the second water channel rib 3022 is fixedly connected with the inner end surface of the rear side end sealing ring 303, a gap of 50-80 mm is reserved between the other end of the second water channel rib 3022 and the inner end surface of the front side end sealing ring 303, and the first water channel rib 3021 and the second water channel rib 3022 are staggered, so that an S-shaped roundabout cooling water channel 305 is formed;
two third water channel ribs 3023 parallel to the axis are uniformly distributed between every two adjacent first water channel ribs 3021 and second water channel ribs 3022 on the outer side wall of the inner barrel 302, a gap of 50-80 mm is reserved between two ends of each third water channel rib 3023 and the inner end surface of the corresponding side end sealing ring 303, and a plurality of water channel interlayers are formed in the cooling water channel 305 by the third water channel ribs 3023, so that the water flow speed is delayed, the heat exchange between cold water and hot air in the engine base is facilitated, and the heat dissipation efficiency is improved.
As shown in fig. 1 and 5, the outer shape of the air guide cover 31 is in a fan shape, the upper end of the air guide cover 31 is provided with a ventilation opening which is communicated with the inside of the centrifugal fan 1, the right side opening of the air guide cover 31 is fixedly connected with the front end cover 2, and the air inlet hole is arranged in the right side opening of the air guide cover 31.
As shown in fig. 5, two groups of air inlet holes are provided, one group is provided with 17 first air inlet holes 201 which are uniformly distributed in circumference, the other group is provided with 18 second air inlet holes 202 which are uniformly distributed in circumference, and the second air inlet holes 202 are arranged on the inner side of the first air inlet holes 201 and are staggered with the first air inlet holes 201.
As shown in fig. 6, two groups of air outlets are provided, one group is provided with 46 first air outlets 901 uniformly distributed circumferentially, the other group is provided with 46 second air outlets 902 uniformly distributed circumferentially, the second air outlets 902 are arranged on the inner side of the first air outlets 901 and are staggered with the first air outlets 901, and in order to ensure the strength of the rear end cover, the first air outlets 901 and the second air outlets 902 synchronously drill one hole every 7-9 holes.
As shown in fig. 2, the front bearing assembly comprises a front bearing seat 10, a front bearing 12, a front inner bearing sleeve 11, a first labyrinth seal 14 and a first oil slinger 13, wherein the front bearing seat 10 is sleeved between the outer circular surface of a main shaft 20 and the inner hole wall of a front end cover 2, a flange is arranged on the outer circular surface and fixedly connected with the front end cover 2, the front bearing 12 is arranged in the front bearing seat 10, the front end of the outer circular surface of the main shaft 20 is sleeved with the first labyrinth seal 14 at the matching position of the front bearing seat 10, the front inner bearing sleeve 11 is arranged at the rear end of the front bearing 12, and the first oil slinger 13 is arranged at the matching position of the rear end of the front bearing 12 and the front inner bearing sleeve 11;
the rear bearing assembly comprises a rear bearing seat 15, a rear bearing 17, a rear inner bearing sleeve 16, a second labyrinth seal 19 and a second oil slinger 18, wherein the rear bearing seat 15 is sleeved between the outer circular surface of a main shaft 20 and the inner hole wall of the rear end cover 9, the outer circular surface of the main shaft is provided with a flange and fixedly connected with the rear end cover 9, the rear bearing 17 is arranged in the rear bearing seat 15, the rear end of the outer circular surface of the main shaft 20 is sleeved with the second labyrinth seal 19 at the matched position of the rear bearing seat 15, the rear inner bearing sleeve 16 is arranged at the front end of the rear bearing 17, and the second oil slinger 18 is arranged at the matched position of the front end of the rear bearing 17 and the rear inner bearing sleeve 16.
As shown in fig. 7, 8 and 9, the upper and lower sides of the front end surface of the flange plate of the connecting flange 23 are symmetrically provided with first key grooves 2301, the rear end surface of the main shaft 20 is provided with second key grooves 2001 at positions corresponding to the first key grooves 2301, the first key grooves 2301 and the corresponding second key grooves 2001 are internally provided with second flat keys 25, the flange plate of the connecting flange 23 is provided with 12 bolt mounting holes 2302 uniformly distributed in circumference, the bolt mounting holes 2302 are staggered with the first key grooves 2301, the rear end surface of the main shaft 20 is provided with matched internal thread holes 2002 at positions corresponding to the bolt mounting holes 2302, and the flange plate of the connecting flange 23 is connected with the main shaft 20 through the second flat keys 25 and fixedly connected with 12 bolts.
As shown in fig. 2, the rear end of the connecting flange 23 is fixedly connected with a coaxial small shaft 28, and a rotary transformer 29 is mounted on the outer circular surface of the small shaft 28, and the rotary transformer 29 is used for measuring the speed to realize closed-loop control.
As shown in fig. 1 and 2, a first rain cover 33 is arranged outside the rotary transformer 29, an air plug connector 30 is arranged on the first rain cover 33, and a protective cover 34 is arranged outside the air plug connector 30; the outer side of the rear end cover 9 is provided with a second rain cover 32.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (5)
1. The large-scale internal and external mixed double-air-cooling and water-cooling permanent magnet synchronous motor comprises a machine base, a stator sleeved in the machine base, a rotor sleeved in the stator and a main shaft fixedly connected with the rotor, and is characterized in that a cooling water channel is arranged in the outer side wall of the machine base, two water inlet and outlet pipes are arranged on the outer side wall of the cooling water channel and are respectively connected with a water outlet and a water inlet of an external water cooling system to form a water cooling loop, the inside of the motor can be cooled by water, the main shaft is a hollow shaft, a ball cage universal coupling is sleeved in the center of the inside of the main shaft, a connecting flange is arranged at the rear end of the ball cage universal coupling, the rear end of the ball cage universal coupling is fixedly connected with the front end of the connecting flange, and a shaft sleeve is fixedly connected with the front end of the ball cage universal coupling and is used for being connected with a rotating shaft of a slurry pump;
the rotor comprises a rotor core and a rotor bracket, wherein a plurality of permanent magnet steels are embedded on the rotor core, the rotor core is fixedly connected with the rotor bracket, the rotor bracket is fixedly connected with the middle of the main shaft through a first flat key, and a front fan and a rear fan are respectively arranged on the front end face and the rear end face of the rotor bracket;
the front end and the rear end of the machine base are respectively provided with a front end cover and a rear end cover, an inner hole of the front end cover is connected with the outer circular surface of the main shaft through a front bearing assembly, the inner hole of the rear end cover is connected with the outer circular surface of the main shaft through a rear bearing assembly, a plurality of circumferentially uniformly distributed air inlet holes are formed in the upper part of the front end cover, an air guide cover is arranged at the corresponding position of the air inlet holes in the upper part of the front side surface of the front end cover, a centrifugal fan is arranged above the air guide cover, a step-shaped flange is arranged on the front end surface of the front end cover, and the step-shaped flange is sleeved on the outer side of the shaft sleeve and is used for being connected with a slurry pump bearing seat; the rear end cover is provided with a plurality of air outlet holes uniformly distributed on the circumference;
the centrifugal fan sucks external cold air and throws the air into the motor through the air guide cover and the air inlet hole, so that the air pressure in the engine base is increased, the rotor rotates simultaneously to drive the front fan and the rear fan to synchronously rotate, the air in the engine base is mixed, the entered cold air and hot air flow and are mixed, the internal temperature is uniform, and the cooling water channel in the engine base and the hot air in the engine base are matched for rapid heat exchange, so that the cooling speed is further increased, the air pressure is increased, and the air in the engine base is forced to be discharged from the air outlet hole on the rear end cover, so that internal and external mixed double air cooling circulation is formed;
the machine seat adopts a steel welding cylindrical structure and comprises an inner cylinder, an outer cylinder, an end sealing ring and water inlet and outlet ports, wherein the inner cylinder is sleeved in the outer cylinder, the end sealing ring is provided with two parts, the two parts are respectively welded, sealed and fixedly connected to the left end and the right end of the inner cylinder and the outer cylinder, the cooling water channel is arranged between the inner cylinder and the outer cylinder, the two parts are arranged at the water inlet and outlet ports, the two parts are arranged on the side wall of the front side of the outer cylinder in a side-by-side and spaced manner, and the two parts are communicated with the cooling water channel;
the inner cylinder is characterized in that the outer side wall of the inner cylinder is provided with N first water channel ribs which are uniformly distributed circumferentially and parallel to the axis and N second water channel ribs which are uniformly distributed circumferentially and parallel to the axis, N is a natural number larger than 1, one end of each first water channel rib is fixedly connected with the inner end face of the front side end seal ring, a gap of 50-80 mm is reserved between the other end of each first water channel rib and the inner end face of the rear side end seal ring, one end of each second water channel rib is fixedly connected with the inner end face of the rear side end seal ring, a gap of 50-80 mm is reserved between the other end of each second water channel rib and the inner end face of the front side end seal ring, and the first water channel ribs and the second water channel ribs are staggered, so that an S-shaped roundabout cooling water channel is formed;
two third water channel ribs parallel to the axis are uniformly distributed between every two adjacent first water channel ribs and every two adjacent second water channel ribs on the outer side wall of the inner cylinder, a gap of 50-80 mm is reserved between two ends of each third water channel rib and the inner end face of the corresponding side end sealing ring, a plurality of water channel interlayers are formed in the cooling water channel by the third water channel ribs, the water flow speed is delayed, the heat exchange between cold water and hot air in the engine base is facilitated, and the heat dissipation efficiency is improved;
the outer shape of the wind scooper is fan-shaped, the upper end of the wind scooper is provided with a ventilation opening which is communicated with the inside of the centrifugal fan, the right side of the wind scooper is provided with an opening, the right side end face of the wind scooper is fixedly connected with the front end cover, and the air inlet hole is arranged in the opening on the right side of the wind scooper;
the air inlet holes are provided with two groups, one group is provided with a plurality of first air inlet holes uniformly distributed in the circumference, the other group is provided with a plurality of second air inlet holes uniformly distributed in the circumference, and the second air inlet holes are arranged on the inner side of the first air inlet holes and staggered with the first air inlet holes;
the air outlet holes are arranged in two groups, one group is provided with a plurality of first air outlet holes which are uniformly distributed in the circumference, the other group is provided with a plurality of second air outlet holes which are uniformly distributed in the circumference, and the second air outlet holes are arranged on the inner side of the first air outlet holes and are staggered with the first air outlet holes.
2. The large-scale internal and external mixing double air-cooling and water-cooling permanent magnet synchronous motor according to claim 1, wherein the motor is characterized in that: the front bearing assembly comprises a front bearing seat, a front bearing, a front inner bearing sleeve, a first labyrinth oil seal and a first oil slinger, wherein the front bearing seat is sleeved between the outer circular surface of the main shaft and the inner hole wall of the front end cover, the outer circular surface of the main shaft is provided with a flange which is fixedly connected with the front end cover, the front bearing is arranged in the front bearing seat, the front end of the outer circular surface of the main shaft is sleeved with the first labyrinth oil seal at the matching position of the front bearing seat, the front inner bearing sleeve is arranged at the rear end of the front bearing, and the first oil slinger is arranged at the matching position of the rear end of the front bearing and the front inner bearing sleeve;
the rear bearing assembly comprises a rear bearing seat, a rear bearing, a rear inner bearing sleeve, a second labyrinth oil seal and a second oil slinger, wherein the rear bearing seat is sleeved between the outer circular surface of the main shaft and the inner hole wall of the rear end cover, the outer circular surface of the main shaft is provided with a flange and fixedly connected with the rear end cover, the rear bearing is arranged in the rear bearing seat, the rear end of the outer circular surface of the main shaft is sleeved with the second labyrinth oil seal at the matching position of the rear bearing seat, the rear inner bearing sleeve is arranged at the front end of the rear bearing, and the second oil slinger is arranged at the matching position of the front end of the rear bearing and the rear inner bearing sleeve.
3. The large-scale internal and external mixing double air-cooling and water-cooling permanent magnet synchronous motor according to claim 1, wherein the motor is characterized in that: the flange plate of the connecting flange is provided with a plurality of bolt mounting holes which are uniformly distributed on the circumference, the bolt mounting holes are staggered with the first key grooves, the positions on the rear end surface of the main shaft, corresponding to the bolt mounting holes, are provided with matched internal threaded holes, the flange plate of the connecting flange is connected with the main shaft through the second flat key, and a plurality of bolts are fixedly connected.
4. The large-scale internal and external mixing double air-cooling and water-cooling permanent magnet synchronous motor according to claim 1, wherein the motor is characterized in that: the rear end of the connecting flange is fixedly connected with a coaxial small shaft, a rotary transformer is arranged on the outer circular surface of the small shaft, and the rotary transformer is used for measuring the speed to realize closed-loop control; the rotary transformer is provided with a first rain cover, the first rain cover is provided with an aviation plug connector, and a protective cover is arranged outside the aviation plug connector.
5. A large internal and external hybrid double air-cooled, water-cooled permanent magnet synchronous motor according to any one of claims 1 to 4, characterized in that: and a second rain cover is arranged on the outer side of the rear end cover.
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|---|---|---|---|
| CN202210210568.0A CN114552852B (en) | 2022-03-03 | 2022-03-03 | Large-scale internal-external mixed double-air-cooling and water-cooling permanent magnet synchronous motor |
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| CN202210210568.0A CN114552852B (en) | 2022-03-03 | 2022-03-03 | Large-scale internal-external mixed double-air-cooling and water-cooling permanent magnet synchronous motor |
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| CN114552852B true CN114552852B (en) | 2024-03-01 |
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| CN201731066U (en) * | 2010-04-28 | 2011-02-02 | 陈浩 | Dynamic reducer shaft end seal structure |
| JP2011166908A (en) * | 2010-02-08 | 2011-08-25 | Toshiba Corp | Totally enclosed motor |
| CN104917338A (en) * | 2014-12-26 | 2015-09-16 | 山西汾西重工有限责任公司 | Marine vertical-type frequency-conversion three-phase asynchronous motor |
| CN208596992U (en) * | 2018-10-12 | 2019-03-12 | 威海市恒达电机厂 | A kind of torque motor |
| CN211321069U (en) * | 2019-12-30 | 2020-08-21 | 无锡市宏泰电机股份有限公司 | Frequency-conversion speed-regulation three-phase asynchronous motor |
| CN211908573U (en) * | 2020-04-15 | 2020-11-10 | 大连冠力电机科技有限公司 | Motor with centrifugal concentrated air-cooling heat radiation structure |
| CN212183236U (en) * | 2020-05-13 | 2020-12-18 | 苏州朗高电机有限公司 | Novel permanent magnet variable pitch motor structure |
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2022
- 2022-03-03 CN CN202210210568.0A patent/CN114552852B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011166908A (en) * | 2010-02-08 | 2011-08-25 | Toshiba Corp | Totally enclosed motor |
| CN201731066U (en) * | 2010-04-28 | 2011-02-02 | 陈浩 | Dynamic reducer shaft end seal structure |
| CN104917338A (en) * | 2014-12-26 | 2015-09-16 | 山西汾西重工有限责任公司 | Marine vertical-type frequency-conversion three-phase asynchronous motor |
| CN208596992U (en) * | 2018-10-12 | 2019-03-12 | 威海市恒达电机厂 | A kind of torque motor |
| CN211321069U (en) * | 2019-12-30 | 2020-08-21 | 无锡市宏泰电机股份有限公司 | Frequency-conversion speed-regulation three-phase asynchronous motor |
| CN211908573U (en) * | 2020-04-15 | 2020-11-10 | 大连冠力电机科技有限公司 | Motor with centrifugal concentrated air-cooling heat radiation structure |
| CN212183236U (en) * | 2020-05-13 | 2020-12-18 | 苏州朗高电机有限公司 | Novel permanent magnet variable pitch motor structure |
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| CN114552852A (en) | 2022-05-27 |
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