CN115833487A - Stator heating and dehumidifying device of explosion-proof motor - Google Patents
Stator heating and dehumidifying device of explosion-proof motor Download PDFInfo
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- CN115833487A CN115833487A CN202211553727.3A CN202211553727A CN115833487A CN 115833487 A CN115833487 A CN 115833487A CN 202211553727 A CN202211553727 A CN 202211553727A CN 115833487 A CN115833487 A CN 115833487A
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Abstract
The invention relates to the field of explosion-proof motors, in particular to a stator heating and dehumidifying device of an explosion-proof motor, which comprises a stator of the motor; a copper coil is wound on the stator; both ends of the stator are provided with heating and dehumidifying units; the heating and dehumidifying unit comprises a heating plate and a heating resistance wire; the heating plate is fixed on the end face of the stator through a bolt, and a heating resistance wire is coiled inside the heating plate; the heating resistance wire is laid in the interlayer in the heating plate and electrically connected with an external power supply, before the explosion-proof motor is started, the heating resistance wire is connected with the external power supply to heat and dry the copper winding group at the end part of the stator, and when the explosion-proof motor is started, the power supply connected with the heating resistance wire is disconnected, so that the explosion-proof motor stably works under the condition of no external power supply interference; the heating plate can be connected to the normally closed point of the alternating current contactor of the explosion-proof motor, and when the explosion-proof motor is electrified, the heating plate is powered off, so that the stable operation of the explosion-proof motor can be ensured.
Description
Technical Field
The invention relates to the field of explosion-proof motors, in particular to a stator heating and dehumidifying device of an explosion-proof motor.
Background
The explosion-proof motor is a motor which can be used in flammable and explosive places, has an explosion-proof effect, can be used in a severe environment, does not generate electric sparks during operation, and is mainly used in coal mines, petroleum and natural gas, petrochemical industry and chemical industry;
explosion-proof machine is arranged in the colliery operation environment, colliery humid environment, perhaps high humid operating mode such as open air to the motor that does not work for a long time or the motor of intermittent type nature opening and outage, and the motor winding is because of the moist condensation, when its insulating nature is relatively poor in artifical the record, and when serious, the motor wets and damages the winding insulation, and when the restart, the motor explodes, brings bigger loss.
Therefore, the stator heating and dehumidifying device of the explosion-proof motor is provided for solving the problems.
Disclosure of Invention
To remedy the deficiencies of the prior art, at least one of the technical problems set forth in the background is addressed.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a stator heating and dehumidifying device of an explosion-proof motor, which comprises a stator of the motor; a copper coil is wound on the stator; both ends of the stator are provided with heating and dehumidifying units; the heating and dehumidifying unit comprises a heating plate and a heating resistance wire; the heating plate is fixed on the end face of the stator through a bolt, and a heating resistance wire is coiled inside the heating plate; in the embodiment of the invention, the heating plate is arranged on the stator to heat and dehumidify the stator, so that the drying degree in the explosion-proof motor is ensured, and the insulativity of the winding group in the explosion-proof motor is ensured; the heating resistance wire is laid in the interlayer in the heating plate and electrically connected with an external power supply, before the explosion-proof motor is started, the heating resistance wire is connected with the external power supply to heat and dry the copper winding group at the end part of the stator, and when the explosion-proof motor is started, the power supply connected with the heating resistance wire is disconnected, so that the explosion-proof motor stably works under the condition of no external power supply interference; the heating plate can be connected to the normally closed point of the alternating current contactor of the explosion-proof motor, and when the explosion-proof motor is electrified, the heating plate is powered off, so that the stable operation of the explosion-proof motor can be ensured.
Preferably, the inner ring of the heating plate is provided with arc-shaped plates, the arc-shaped plates are opposite to the gaps of the copper coils on the stator one by one, and the arc-shaped plates are embedded in the gaps and attached to the surfaces of the gaps; the heating plate of the heating resistance wire piece is heated, meanwhile, heat on the heating plate is transferred to the arc-shaped plate, the arc-shaped plate extends and is embedded into a gap of copper coil winding wires, and the copper coils at more parts are heated and dried, so that the insulativity of the stator of the explosion-proof motor is improved; the arc is for better transfer heat, and the material of arc is the same with the manufacturing material of stator, and the arc has electrically conductive function, need to have insulating material at the surface spraying of arc for this reason, avoids copper coil electric property intercommunication arc, leads to the inside short circuit of explosion-proof machine.
Preferably, a through hole is formed in the solid part of the end part of the stator, a heating rod is arranged in the through hole, and electric contact points at two ends of the heating rod are electrically connected to heating resistance wires in the heating plate; the heating rod is internally provided with a heating resistance wire, the surface of the heating rod is coated with an insulating material, the heating rod extends into the through hole to heat the whole stator, so that the explosion-proof motor stably and gradually rises, a temperature sensor can be arranged at the end part of the stator to measure the temperature rise of the stator, the temperature of the stator is started within the range of 5-10 ℃, and a good environment is provided for the starting environment of the explosion-proof motor.
Preferably, a plurality of air outlet holes are formed in the radial direction of the through hole, and the air outlet holes are communicated with gaps wound by the copper coils; a cylinder is arranged in the through hole, an air passage and a jack are axially arranged on the cylinder, and the heating rod is inserted into the jack; a hollow ring body is arranged between the end part of the stator and the heating plate, the outer ring of the ring body is communicated with a plurality of hoses, the end surface of the ring body is communicated with a plurality of air pipes, and the air pipes are inserted into the port positions of the air passages; after being heated, the water in the explosion-proof motor seeps out of the explosion-proof motor in a steam mode and seeps out of the heat dissipation position of the explosion-proof motor, and in the seeping process, when the water meets the local lower temperature position on the explosion-proof motor, the steam is condensed into water drops again, which is not beneficial to dehumidifying the interior of the explosion-proof motor, and a hollow ring body and a gas pipe are arranged for this purpose; the cylinder surface is seted up the exhaust hole, exhaust hole intercommunication air flue, the hose communicates external air feed pump, pour into dry hot gas flow, the air current pours into the air flue along the trachea in, later along the exhaust hole pour into the through-hole into, discharge from the venthole at last, and strike winding gap on the stator, heat the moisture of the deep layer of stator and dry, improve the drying degree of stator, and the hot gas flow auxiliary heating stick is to the heating of stator, the hot gas flow can permeate to the stator intermediate position, also can heat the rotor, improve explosion-proof machine's insulating nature.
Preferably, a first groove is formed between adjacent gaps on each metal sheet of the stator, a second groove is formed between two adjacent through holes on each metal sheet, and a third groove is formed between each second groove and each first groove; a groove is all seted up on every sheetmetal two sides of stator, no. two grooves and No. three grooves, two adjacent sheetmetal combinations back together, no. two grooves enclose into cylindrical cavity, airflow pours into the air flue along the trachea in, later along the exhaust hole pour into the through-hole into, gas flows along the cavity, gas flows from stator wire winding clearance lateral wall, to copper coil heat drying and dehumidification, improve the inside degree of dryness of dense copper coil.
Preferably, the outer ring of the stator is uniformly provided with a plurality of semicircular grooves, the semicircular grooves are formed along the axial direction of the stator, each semicircular groove is internally provided with a heating rod, and the end part of each heating rod is fixedly connected with the surface of the heating plate; the inside heating resistor silk that is provided with of heating rod, heating rod surface are paintd insulating material, and the heating rod generates heat and heats the stator outer lane, promptly, in to the inside heating of stator, also heats the stator outer lane for stator bulk heating guarantees that every position temperature all obtains rising on the stator.
Preferably, the surface of the heating rod is sleeved with a sleeve, the sleeve is embedded in the semicircular groove, and the surface of the sleeve exposed out of the semicircular groove is attached to the inner side wall of the motor shell; the stator is embedded in the shell of the explosion-proof motor, and the surface of the stator is provided with the semicircular groove, so that the effective contact surface between the outer ring of the stator and the shell is reduced, the stability of the stator in the shell is reduced, the sleeve is arranged for the purpose, the sleeve is fixedly connected with the heating rod into a whole, the surface of the sleeve is tightly attached to the inner side wall of the shell to make up the semicircular groove arranged on the stator, and the stator can be stabilized in the shell,
preferably, the edge of the surface of each metal sheet of the stator is provided with a fourth groove, the fourth groove is opposite to the semicircular groove, a connecting pin is extruded in the fourth groove, and the end part of the connecting pin is fixedly connected with a sleeve; after two adjacent stator sheetmetals superpose each other, cylindrical cavity is enclosed into in two No. four grooves, and the connecting pin is extruded in the cavity that No. four grooves enclose, makes further fixed to the sleeve pipe, improves the stability between sleeve pipe and the stator, improves stability between stator and the casing then.
Preferably, the surface of the heating plate is also provided with a heating resistance wire, and the heating resistance wire on the surface of the heating plate is arranged in a bending way; set up heating resistor silk on the surface of hot plate, carry out radiant heating stoving to the copper coil that exposes at the stator both ends, and the heating resistor silk of crooked setting, the space on make full use of hot plate surface arranges more heating resistor silks, improves the heating stoving dehumidification effect to copper coil.
Preferably, an insulating layer is sleeved on the electric heating resistance wire on the surface of the heating plate; through set up the insulating layer at electric heating resistor silk, prevent that the inside metal piece of explosion-proof machine from contacting with electric heating resistor silk to with copper coil electric contact, lead to the inside short circuit of explosion-proof machine.
The invention has the advantages that:
1. according to the invention, through the structural design of the heating plate, the heating resistance wire is laid in the interlayer in the heating plate and is electrically connected with an external power supply, before the explosion-proof motor is started, the heating resistance wire is connected with the external power supply to heat and dry the copper winding group at the end part of the stator, and when the explosion-proof motor is started, the power supply connected with the heating resistance wire is disconnected, so that the explosion-proof motor stably works under the condition of no external power supply interference; the heating plate can be connected to the normally closed point of the alternating current contactor of the explosion-proof motor, and when the explosion-proof motor is electrified, the heating plate is powered off, so that the stable operation of the explosion-proof motor can be ensured.
2. The invention arranges the hollow ring body and the air pipe; the cylinder surface is seted up the exhaust hole, exhaust hole intercommunication air flue, the hose communicates external air feed pump, pour into dry hot gas flow, the air current pours into the air flue along the trachea in, later along the exhaust hole pour into the through-hole into, discharge from the venthole at last, and strike winding gap on the stator, heat the moisture of the deep layer of stator and dry, improve the drying degree of stator, and the hot gas flow auxiliary heating stick is to the heating of stator, the hot gas flow can permeate to the stator intermediate position, also can heat the rotor, improve explosion-proof machine's insulating nature.
Drawings
FIG. 1 is a perspective view of a stator of a heating and dehumidifying unit according to an embodiment;
FIG. 2 is a perspective view of a heating and dehumidifying unit according to an embodiment;
FIG. 3 is a perspective view of a ring body according to one embodiment;
FIG. 4 is a perspective view of a cylinder according to one embodiment;
FIG. 5 is a perspective view of a stator according to one embodiment;
FIG. 6 is a partial enlarged view of the portion A in FIG. 5;
FIG. 7 is a top view of a metal sheet according to one embodiment;
FIG. 8 is a perspective view of the stator engaging a heater rod according to one embodiment;
FIG. 9 is a perspective view of a heating rod according to one embodiment;
FIG. 10 is a perspective view of a heating panel according to a second embodiment;
in the figure: stator 1, hot plate 2, arc 3, through-hole 4, heating rod 5, venthole 6, cylinder 7, exhaust hole 71, air flue 8, jack 9, ring 10, hose 11, no. one groove 12, no. two grooves 13, no. three grooves 14, half slot 15, heating rod 16, sleeve pipe 17, no. four grooves 18, connecting pin 19.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The first embodiment is as follows:
referring to fig. 1 and 2, the stator heating and dehumidifying device of the explosion-proof motor comprises a stator 1 of the motor; a copper coil is wound on the stator 1; both ends of the stator 1 are provided with heating and dehumidifying units; the heating and dehumidifying unit comprises a heating plate 2 and a heating resistance wire; the heating plate 2 is fixed on the end face of the stator 1 through a bolt, and a heating resistance wire is coiled inside the heating plate 2; in the embodiment of the invention, the heating plate 2 is arranged on the stator 1 to heat and dehumidify the stator, so that the drying degree of the interior of the explosion-proof motor is ensured, and the insulativity of a winding group in the interior of the explosion-proof motor is ensured; a heating resistance wire is laid in an interlayer in the heating plate 2 and electrically connected with an external power supply, before the explosion-proof motor is started, the heating resistance wire is connected with the external power supply to heat and dry the copper winding group at the end part of the stator 1, and when the explosion-proof motor is started, the power supply connected with the heating resistance wire is disconnected, so that the explosion-proof motor stably works under the condition of no external power supply interference; the heating plate 2 can also be connected to the normally closed point of the alternating current contactor of the explosion-proof motor, and when the explosion-proof motor is electrified, the heating plate 2 is powered off, so that the stable operation of the explosion-proof motor can be ensured.
Referring to fig. 1 and 2, the inner ring of the heating plate 2 is provided with arc-shaped plates 3, the arc-shaped plates 3 are opposite to the gaps of the copper coils on the stator 1 one by one, and the arc-shaped plates 3 are embedded in the gaps and attached to the surfaces of the gaps; the heating plate 2 of the heating resistance wire part is heated, meanwhile, heat on the heating plate 2 is transferred to the arc-shaped plate 3, the arc-shaped plate 3 extends and is embedded in a gap of copper coil winding, the copper coils at more positions are heated and dried, and the insulativity of the stator 1 of the explosion-proof motor is improved; for better transfer heat, the material of arc 3 is the same with the manufacturing material of stator 1, and arc 3 has electrically conductive function, for this reason need have insulating material at 3 surface spraying of arc, avoids copper coil electrical property intercommunication arc 3, leads to the inside short circuit of explosion-proof machine.
Referring to fig. 1, 2, 4 and 6, a through hole 4 is formed in an end solid part of the stator 1, a heating rod 5 is arranged in the through hole 4, and electric contacts at two ends of the rod of the heating plate 2 are electrically connected to a heating resistance wire in the heating plate 2; the heating rod 5 is internally provided with a heating resistance wire, the surface of the heating rod 5 is coated with an insulating material, the heating rod 5 extends into the through hole 4 to heat the whole stator 1, so that the explosion-proof motor stably and gradually rises, a temperature sensor can be arranged at the end part of the stator 1 to measure the temperature rise of the stator 1, the temperature of the stator 1 is started within the range of 5-10 ℃, and a good environment is provided for the starting environment of the explosion-proof motor.
Referring to fig. 4, 6 and 7, a plurality of air outlet holes 6 are radially formed in the through hole 4, and the air outlet holes 6 are communicated with gaps around which the copper coils are wound; a cylinder 7 is arranged in the through hole 4, an air passage 8 and a jack 9 are axially arranged on the cylinder 7, and the heating rod 5 is inserted into the jack 9; a hollow ring body 10 is arranged between the end part of the stator 1 and the heating plate 2, the outer ring of the ring body 10 is communicated with a plurality of hoses 11, the end surface of the ring body 10 is communicated with a plurality of air pipes, and the air pipes are inserted into the port positions of the air passages 8; after being heated, the moisture in the explosion-proof motor seeps out of the explosion-proof motor in a steam mode and seeps out of the heat dissipation position of the explosion-proof motor, and in the seeping process, when the moisture meets the local lower temperature position on the explosion-proof motor, the steam is condensed into water drops again, which is not beneficial to dehumidifying the interior of the explosion-proof motor, and a hollow ring body 10 and a hollow gas pipe are arranged; the surface of the cylinder 7 is provided with an exhaust hole 71, the exhaust hole 71 is communicated with the air flue 8, the hose 11 is communicated with an external air supply pump, dry hot air flow is injected, the air flow is injected into the air flue 8 along an air pipe, then is injected into the through hole 4 along the exhaust hole 71, and is finally discharged from the air outlet 6, and impacts on a winding gap on the stator 1, moisture in the deep layer of the stator 1 is heated and dried, the drying degree of the stator 1 is improved, the hot air flow assists the heating rod 5 to heat the stator 1, the hot air flow can permeate to the middle position of the stator 1, the rotor can also be heated, and the insulativity of the explosion-proof motor is improved.
Referring to fig. 6 and 7, a first groove 12 is formed between adjacent gaps on each metal sheet of the stator 1, a second groove 13 is formed between two adjacent through holes 4 on each metal sheet, and a third groove 14 is formed between the second groove 13 and the first groove 12; stator 1's every sheetmetal two sides all sets up a groove 12, no. two grooves 13 and No. three grooves 14, two adjacent sheetmetal combinations back together, no. two grooves 12 enclose into cylindrical cavity, no. two grooves 13 enclose into cylindrical cavity, no. two grooves 14 enclose into cylindrical cavity, the air current pours into the air flue 8 into along the trachea in, later pour into through-hole 4 into along exhaust hole 71 into, gas flows along the cavity, gaseous from 1 wire winding clearance lateral wall outflow of stator, heat to copper coil and dry and the dehumidification, improve the inside degree of dryness of dense copper coil.
Referring to fig. 7, 8 and 9, a plurality of semicircular grooves 15 are uniformly formed in the outer ring of the stator 1, the semicircular grooves 15 are formed along the axial direction of the stator 1, a heating rod 16 is arranged in each semicircular groove 15, and the end of each heating rod 16 is fixedly connected to the surface of the heating plate 2; the inside heating resistor silk that is provided with of heating rod 16, 16 surfaces of heating rod are scribbled insulating material, and heating rod 16 generates heat and heats 1 outer lane of stator, promptly, in 1 internal heating of stator, also heats 1 outer lane of stator for 1 bulk heating of stator guarantees that every position temperature all obtains rising on the stator 1.
Referring to fig. 9, a sleeve 17 is sleeved on the surface of the heating rod 16, the sleeve 17 is embedded in the semicircular groove 15, and the surface of the sleeve 17 exposed out of the semicircular groove 15 is attached to the inner side wall of the motor housing; the stator 1 is embedded in the shell of the explosion-proof motor, because the surface of the stator 1 is provided with the semicircular groove 15, the effective contact surface between the outer ring of the stator 1 and the shell is reduced, and the stability of the stator 1 in the shell is reduced, therefore, the sleeve 17 is arranged, the sleeve 17 is fixedly connected with the heating rod 16 into a whole, the surface of the sleeve 17 is closely attached to the inner side wall of the shell to compensate the semicircular groove 15 arranged on the stator 1, so that the stator 1 can be stabilized in the shell,
referring to fig. 7 and 9, a fourth groove 18 is formed in the edge of the surface of each metal sheet of the stator 1, the fourth groove 18 is opposite to the semicircular groove 15, a connecting pin 19 is extruded in the fourth groove 18, and the end of the connecting pin 19 is fixedly connected with a sleeve 17; after two adjacent stator 1 sheetmetals superpose each other, no. two grooves 18 enclose into cylindrical cavity, and connecting pin 19 is extruded in the cavity that No. four grooves 18 enclose, makes further fixed to sleeve pipe 17, improves the stability between sleeve pipe 17 and the stator 1, improves stability between stator 1 and the casing then.
Example two:
referring to fig. 10, a first comparative example is another embodiment of the present invention, wherein the surface of the heating plate 2 is also provided with a heating resistance wire, and the heating resistance wire on the surface of the heating plate 2 is bent; set up heating resistor silk on the surface of hot plate 2, carry out radiant heating stoving to the copper coil that exposes at stator 1 both ends, and the heating resistor silk of crooked setting, the space on 2 surfaces of make full use of hot plate arranges more heating resistor silks, improves the heating stoving dehumidification effect to the copper coil.
An insulating layer is sleeved on the electric heating resistance wire on the surface of the heating plate 2; through set up the insulating layer at electric heating resistor silk, prevent that the inside metal piece of explosion-proof machine from contacting with electric heating resistor silk to with copper coil electric contact, lead to the inside short circuit of explosion-proof machine.
The working principle is as follows: a heating resistance wire is laid in an interlayer in the heating plate 2 and electrically connected with an external power supply, before the explosion-proof motor is started, the heating resistance wire is connected with the external power supply to heat and dry the copper winding group at the end part of the stator 1, and when the explosion-proof motor is started, the power supply connected with the heating resistance wire is disconnected, so that the explosion-proof motor stably works under the condition of no external power supply interference; the heating plate 2 can also be connected to the normally closed point of the alternating current contactor of the explosion-proof motor, and when the explosion-proof motor is electrified, the heating plate 2 is powered off, so that the stable operation of the explosion-proof motor can be ensured;
the heating plate 2 of the heating resistance wire part is heated, meanwhile, heat on the heating plate 2 is transferred to the arc-shaped plate 3, the arc-shaped plate 3 extends and is embedded in a gap of copper coil winding, the copper coils at more positions are heated and dried, and the insulativity of the stator 1 of the explosion-proof motor is improved; in order to better transfer heat, the arc-shaped plate 3 is made of the same material as the stator 1, and the arc-shaped plate 3 has a conductive function, so that an insulating material needs to be sprayed on the surface of the arc-shaped plate 3, and the situation that a copper coil is electrically communicated with the arc-shaped plate 3 to cause internal short circuit of the explosion-proof motor is avoided;
a heating resistance wire is arranged inside the heating rod 5, an insulating material is coated on the surface of the heating rod 5, the heating rod 5 extends into the through hole 4 to heat the whole stator 1, so that the explosion-proof motor is stably and gradually raised, a temperature sensor can be arranged at the end part of the stator 1 to measure the temperature rise of the stator 1, the temperature of the stator 1 is started within the range of 5-10 ℃, and a good environment is provided for the starting environment of the explosion-proof motor;
after being heated, the moisture in the explosion-proof motor seeps out of the explosion-proof motor in a steam mode and seeps out of the heat dissipation position of the explosion-proof motor, and in the seeping process, when the moisture meets the local lower temperature position on the explosion-proof motor, the steam is condensed into water drops again, which is not beneficial to dehumidifying the interior of the explosion-proof motor, and a hollow ring body 10 and a hollow gas pipe are arranged; the surface of the cylinder 7 is provided with an exhaust hole 71, the exhaust hole 71 is communicated with an air passage 8, the hose 11 is communicated with an external air supply pump, dry hot air flow is injected, the air flow is injected into the air passage 8 along an air pipe, then is injected into the through hole 4 along the exhaust hole 71, is finally discharged from the air outlet 6, impacts a winding gap on the stator 1, heats and dries moisture in the deep layer of the stator 1, improves the drying degree of the stator 1, and the hot air flow assists the heating rod 5 to heat the stator 1, can permeate the hot air flow to the middle position of the stator 1, can heat the rotor, and improves the insulativity of the explosion-proof motor;
the two sides of each metal sheet of the stator 1 are respectively provided with a first groove 12, a second groove 13 and a third groove 14, after two adjacent metal sheets are combined together, the two first grooves 12 are enclosed into a cylindrical cavity, the two second grooves 13 are enclosed into a cylindrical cavity, the two third grooves 14 are enclosed into a cylindrical cavity, airflow is injected into the air passage 8 along an air pipe and then is injected into the through hole 4 along the exhaust hole 71, the air flows along the cavity, the air flows out from the side wall of a winding gap of the stator 1, the copper coil is heated, dried and dehumidified, and the dryness of the interior of the dense copper coil is improved;
a heating resistance wire is arranged inside the heating rod 16, an insulating material is coated on the surface of the heating rod 16, the heating rod 16 generates heat to heat the outer ring of the stator 1, namely, the inner part of the stator 1 is heated, and the outer ring of the stator 1 is also heated, so that the whole stator 1 is heated, and the temperature of each part on the stator 1 is ensured to be raised;
the stator 1 is embedded in the shell of the explosion-proof motor, and the surface of the stator 1 is provided with the semicircular groove 15, so that the effective contact surface between the outer ring of the stator 1 and the shell is reduced, the stability of the stator 1 in the shell is reduced, a sleeve 17 is arranged for the purpose, the sleeve 17 is fixedly connected with a heating rod 16 into a whole, the surface of the sleeve 17 is closely attached to the inner side wall of the shell to make up the semicircular groove 15 arranged on the stator 1, and the stator 1 can be stabilized in the shell;
after two adjacent stator 1 sheetmetals superpose each other, no. two No. four grooves 18 enclose into cylindrical cavity, and connecting pin 19 is extruded in the cavity that No. four grooves 18 enclose, further fixes sleeve 17, improves the stability between sleeve 17 and the stator 1, improves stability between stator 1 and the casing then.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A stator heating and dehumidifying device of an explosion-proof motor comprises a stator (1) of the motor; a copper coil is wound on the stator (1); the method is characterized in that: both ends of the stator (1) are provided with heating and dehumidifying units; the heating and dehumidifying unit comprises a heating plate (2) and a heating resistance wire; the heating plate (2) is fixed on the end face of the stator (1) through bolts, and heating resistance wires are coiled inside the heating plate (2).
2. The stator heating and dehumidifying device of the explosion-proof motor as claimed in claim 1, wherein: the inner ring of the heating plate (2) is provided with arc-shaped plates (3), the arc-shaped plates (3) are opposite to the gaps of the copper coils on the stator (1) one by one, and the arc-shaped plates (3) are embedded in the gaps and attached to the surfaces of the gaps.
3. The stator heating and dehumidifying device of the explosion-proof motor as claimed in claim 2, wherein: the stator is characterized in that a through hole (4) is formed in the solid part of the end part of the stator (1), a heating rod (5) is arranged in the through hole (4), and electric contact points at two ends of the rod of the heating plate (2) are electrically connected to heating resistance wires in the heating plate (2).
4. The stator heating and dehumidifying device of the explosion-proof motor as claimed in claim 3, wherein: a plurality of air outlet holes (6) are formed in the radial direction of the through hole (4), and the air outlet holes (6) are communicated with gaps wound by the copper coils; a cylinder (7) is arranged in the through hole (4), an air passage (8) and a jack (9) are axially formed in the cylinder (7), and the heating rod (5) is inserted in the jack (9); a hollow ring body (10) is arranged between the end part of the stator (1) and the heating plate (2), the outer ring of the ring body (10) is communicated with a plurality of hoses (11), the end face of the ring body (10) is communicated with a plurality of air pipes, and the air pipes are inserted into port positions of the air passages (8).
5. The stator heating and dehumidifying device of the explosion-proof motor as claimed in claim 4, wherein: a first groove (12) is formed between adjacent gaps on each metal sheet of the stator (1), a second groove (13) is formed between two adjacent through holes (4) on each metal sheet, and a third groove (14) is formed between the second groove (13) and the first groove (12).
6. The stator heating and dehumidifying device of the explosion-proof motor as claimed in claim 5, wherein: a plurality of semicircular grooves (15) are uniformly formed in the outer ring of the stator (1), the semicircular grooves (15) are formed in the axial direction of the stator (1), a heating rod (16) is arranged in each semicircular groove (15), and the end portion of each heating rod (16) is fixedly connected with the surface of the heating plate (2).
7. The stator heating and dehumidifying device of the explosion-proof motor as claimed in claim 6, wherein: the surface cover of heating rod (16) is equipped with sleeve pipe (17), and sleeve pipe (17) embedding is in half slot (15), and sleeve pipe (17) expose and laminate mutually with the motor casing inside wall on the surface outside half slot (15).
8. The stator heating and dehumidifying device of the explosion-proof motor as claimed in claim 6, wherein: four grooves (18) are formed in the edge of the surface of each metal sheet of the stator (1), the four grooves (18) are opposite to the semicircular grooves (15), connecting pins (19) are arranged in the four grooves (18) in an extruding mode, and the end portions of the connecting pins (19) are fixedly connected with sleeves (17).
9. The stator heating and dehumidifying device of the explosion-proof motor as claimed in claim 6, wherein: the surface of the heating plate (2) is also provided with heating resistance wires, and the heating resistance wires on the surface of the heating plate (2) are arranged in a bending mode.
10. The stator heating and dehumidifying device of the explosion-proof motor as claimed in claim 9, wherein: an insulating layer is sleeved on the electric heating resistance wire on the surface of the heating plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211553727.3A CN115833487B (en) | 2022-12-06 | 2022-12-06 | Stator heating and dehumidifying device of explosion-proof motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211553727.3A CN115833487B (en) | 2022-12-06 | 2022-12-06 | Stator heating and dehumidifying device of explosion-proof motor |
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| CN115833487A true CN115833487A (en) | 2023-03-21 |
| CN115833487B CN115833487B (en) | 2023-10-17 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| JP2016220281A (en) * | 2015-05-14 | 2016-12-22 | 多摩川精機株式会社 | Resolver stator structure equipped with heater |
| CN205945402U (en) * | 2016-08-19 | 2017-02-08 | 浙江朝舜机电有限公司 | Three -speed motor for subway tunnel |
| US20180287470A1 (en) * | 2017-03-31 | 2018-10-04 | Siemens Industry, Inc. | Rotating electrical machine with removable heating elements |
| CN215930361U (en) * | 2021-10-08 | 2022-03-01 | 威海公共交通集团有限公司 | Heating and dehumidifying device for automobile motor |
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2022
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB525831A (en) * | 1939-03-01 | 1940-09-05 | English Electric Co Ltd | Improvements in the manufacture of embedded electric heating elements |
| EP0130292A1 (en) * | 1983-05-04 | 1985-01-09 | BROWN, BOVERI & CIE Aktiengesellschaft | Standstill heating for electrical machine |
| JPH0898468A (en) * | 1994-09-27 | 1996-04-12 | Fuji Electric Co Ltd | Stud for fastening stator core of electric rotating machine |
| US20080023177A1 (en) * | 2006-06-19 | 2008-01-31 | Timothy Hassett | Electric motor with heat pipes |
| CN202455185U (en) * | 2012-03-01 | 2012-09-26 | 上虞华盛电机有限公司 | Three-speed motor for subway tunnel |
| CN202940705U (en) * | 2012-11-30 | 2013-05-15 | 南阳防爆集团股份有限公司 | Motor heater mechanism |
| JP2016220281A (en) * | 2015-05-14 | 2016-12-22 | 多摩川精機株式会社 | Resolver stator structure equipped with heater |
| CN205945402U (en) * | 2016-08-19 | 2017-02-08 | 浙江朝舜机电有限公司 | Three -speed motor for subway tunnel |
| US20180287470A1 (en) * | 2017-03-31 | 2018-10-04 | Siemens Industry, Inc. | Rotating electrical machine with removable heating elements |
| CN215930361U (en) * | 2021-10-08 | 2022-03-01 | 威海公共交通集团有限公司 | Heating and dehumidifying device for automobile motor |
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| Publication number | Publication date |
|---|---|
| CN115833487B (en) | 2023-10-17 |
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