CN110144703B

CN110144703B - Low noise drum type washing machine

Info

Publication number: CN110144703B
Application number: CN201910565902.2A
Authority: CN
Inventors: 朱幕松
Original assignee: Individual
Current assignee: Shandong Zhongrui Information Technology Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2021-02-12
Anticipated expiration: 2039-06-27
Also published as: CN110144703A

Abstract

A low-noise drum-type washing machine, set up 4 rubber wheels to coincide on the position equalling the barrel-shaped circle circumference, support the front end of the round drum, make the center of the front end of the round drum stable, the drum shaft supports the rear end of the round drum, make the center of the rear end of the round drum stable, when the round drum rotates at a high speed, the clothes in the round drum is acted on 4 rubber wheels and drum shafts of the rear end on the front end of the round drum because of the eccentric force that is distributed and produced unevenly, the support intensity of rubber wheel and drum shaft is high, the unbalanced vibration that the eccentric force produces is small, the noise is reduced along with reducing; the drum rotor of the permanent magnet motor and the bucket stator are in a mutually closed isolation state, a certain magnetic field gap is kept between the drum rotor and the bucket stator through steel balls at the rear end of the drum shaft, the rear end of the sealed copper sleeve bearing is sealed and does not leak water, the front end of the sealed copper sleeve bearing does not need to be sealed by a water sealing part, and when the round drum rotates, the drum shaft and the sealed copper sleeve bearing are in a water lubrication state.

Description

Low noise drum type washing machine

Technical Field

The present invention relates to a full-automatic drum-type washing machine, in particular, it is a low-noise drum-type washing machine.

Background

In recent years, fully automatic drum type washing machines have entered the market of our country with the advantages of water saving and high washing efficiency, and among various drum type washing machines, direct drive type drum type washing machines have become the mainstream, for example, an invention patent named "drum type washing machine" with patent number "2008800118557", but all drum type washing machines have a common disadvantage: 1. the drum has the problem of large vibration and noise when rotating at high speed, because the diameter of the drum washing machine is large, the clothes in the drum are unevenly distributed under the action of gravity, unbalanced centrifugal force is easily generated when the clothes in the drum rotate in a high-speed drying way, the large eccentric force acts on a drum shaft supporting the drum, the front end of the drum is eccentric due to insufficient rigidity of the drum shaft and the rear end of the drum, larger unbalance is caused, and finally, the drum generates large vibration and noise. 2. The drum shaft of the existing drum-type washing machine needs to be sealed by a water sealing part, and once the water sealing part is abraded, a round water bucket leaks water to corrode a motor.

Disclosure of Invention

The invention provides a low-noise drum-type washing machine without a water seal member, wherein a pulley supports the front end of a drum, aiming at the weak link of the existing drum-type washing machine.

The technical scheme of the low-noise drum-type washing machine is characterized in that the low-noise drum-type washing machine comprises a washing machine shell, a round water bucket, a round roller, a sealed copper bush bearing, a supporting pulley and a permanent magnet motor, wherein the sealed copper bush bearing comprises a bearing body and a bearing body, and the bearing body comprises a bearing body and a bearing body, and the bearing: the low-noise drum type washing machine is provided with a washing machine shell, a round water barrel is arranged in the washing machine shell, the middle part of the upper end in the washing machine shell is provided with an upper left shock absorber and an upper right shock absorber, the middle part of the lower end in the washing machine shell is provided with a lower left shock absorber and a lower right shock absorber, the middle part of the round water barrel is provided with 4 equally-divided connecting lugs, the 4 equally-divided connecting lugs are respectively connected with connecting shafts of the 4 shock absorbers, the outer ends of the 4 shock absorbers are connected with the upper corner and the lower corner in the washing machine shell, the round water barrel is hung in the middle of the washing machine shell, a round drum is arranged in the round water barrel, washing object inlets are arranged in the centers of the front ends of the round drum, the round water barrel and the washing machine shell, a large round door is arranged at the inlet of the washing machine shell, a small round door is arranged at, the front end of the rubber sealing ring is a large circle, the large circle is connected with a large circular door, the rear end of the rubber sealing ring is a small circle, the small circle is connected with a small circular door, a barrel-shaped ring is arranged at the inlet of the circular roller, the rear end of the circular roller is provided with a roller bottom, the barrel-shaped ring and the circular roller are made of stainless steel products, the barrel-shaped ring and the circular roller are integrally manufactured and molded, and the outer circle of the barrel-shaped ring and the inner circle of the small circular ring keep a certain uniform interval; the permanent magnet motor comprises a roller rotor and a bucket stator, the roller rotor is installed at the rear end of a round roller, the bucket stator is installed at the rear end of the round bucket, a bucket bottom is arranged at the rear end of the round bucket, a connecting sleeve is arranged in the center of the bucket bottom, a sealing copper sleeve bearing is installed in the connecting sleeve in a tight fit mode, a rear end cover is arranged in the sealing copper sleeve bearing, a steel ball is arranged at the front end of the rear end cover, a roller shaft is arranged in the sealing copper sleeve bearing, a magnetic conductive disc is connected to the front end of the roller shaft, the roller shaft and the magnetic conductive disc are concentric, the rear end of the roller shaft abuts against the steel ball, the front end of the magnetic conductive disc is installed at the bottom of the round roller, the magnetic conductive disc and the bucket bottom are concentric, the magnetic conductive disc and the bucket bottom are fixedly connected through 4 rivets, a permanent magnet ring is arranged at the right end of the magnetic conductive disc, the, the permanent magnet rings are alternately arranged to form permanent magnet rings, the permanent magnet rings are adsorbed on the outer circumference of the right end face of the magnetic conductive disc and are fixedly bonded by AB glue, and the permanent magnet rings and the magnetic conductive disc form a roller rotor; the round bucket is formed by assembling a front semi-round bucket and a rear semi-round bucket, the front semi-round bucket and the rear semi-round bucket are plastic products, the rear semi-round bucket is provided with a connecting ring, the connecting ring is concentric with a connecting sleeve, the rear semi-round bucket, the connecting sleeve and the connecting ring are integrally injection-molded by high-strength plastics, a stator groove is arranged at the rear end of the bottom of the rear semi-round bucket, the stator groove is concentric with the connecting sleeve, and the thickness of the bottom of the stator groove is smaller than that of the bottom of the bucket; the bucket stator is provided with a connecting ring, the front end of the connecting ring is welded with a reel iron core, the reel iron core is formed by silicon steel strips in a lap-winding mode, the front end of the reel iron core is provided with a plurality of coil grooves, a notch is formed in the middle of the front end of each coil groove, the front end of the reel iron core is installed in a stator groove and is matched with the stator groove, the connecting ring is installed at the rear end of the connecting ring and is fastened by 4 stator screws, the size of the annular surface of a permanent magnet ring is the same as that of the annular surface of the annular iron core, the rear surface of the permanent magnet ring is aligned with the front surface of the reel iron core, a magnetic field air gap is formed between the permanent magnet ring and the reel iron core, the thickness of the bottom of the stator groove is located in the magnetic field air gap, in order to improve the; the winding method comprises the following steps that a plurality of single coils are wound in coil grooves of a reel-shaped iron core, the single coils respectively form a three-phase armature coil, each phase of armature coil is formed by connecting a plurality of single coils in series, the winding directions of the adjacent single coils are opposite, the single coils are wound by using a plurality of strands of enameled wires, the electrical angle between the three-phase armature coils is 120 degrees, the three-phase armature coils are connected into Y-shaped circuit output, three Hall sensors are respectively arranged in three grooves of the reel-shaped iron core, the spacing positions of the three Hall sensors are different by 60 degrees in electrical angle, a three-phase output line and the output lines of the three Hall sensors are combined into a strand of output cable, a bucket stator is formed by an annular iron core, the three-phase armature coils and the three Hall sensors, a wire outlet is formed in the upper end; the low-noise drum type washing machine is provided with a supporting pulley for stabilizing a drum, a left shaft hole and a right shaft hole are respectively arranged above a small round door, connecting shafts are respectively arranged in the left shaft hole and the right shaft hole, a left shaft hole and a right shaft hole are respectively arranged below the small round door, lower connecting shafts are respectively arranged in the left shaft hole and the right shaft hole, the specifications of the upper connecting shaft and the lower connecting shaft are the same, a positioning table is arranged in the middle of each connecting shaft, outer snap springs are arranged at the front end of each positioning table, fastening nuts are arranged at the rear end of each positioning table, bearings are arranged on the connecting shafts, rubber wheels are arranged on the outer circles of the bearings, 4 rubber wheels are matched with the circumferences of barrel-shaped rings at the front end of the drum, the front end of the drum is supported by the 4 rubber wheels at positions which are equally divided into the circumferences of the barrel-shaped rings, the center of the; the washing machine is characterized in that a computer box is arranged at the front upper end in the shell of the washing machine, an operation panel and a knob are arranged at the front upper end outside the shell of the washing machine, a permanent magnet motor controller and a power supply box are arranged at the rear upper end in the shell of the washing machine, an output line of the motor is connected with the output end and the input end of the controller, a power supply end of the controller is connected with the power supply box, the operation panel and the knob are connected with the computer box, an output line of the computer box is connected with the input end of the.

The low-noise drum type washing machine has the beneficial effects that: the low-noise drum-type washing machine adopts a low-speed brushless permanent magnet motor with an axial magnetic circuit to directly drive a round drum, a drum rotor of the permanent magnet motor and a bucket stator are in a mutually sealed isolation state, because a rear end cover is arranged on an inner circle of a sealing copper sleeve bearing, a drum shaft does not need to be sealed by a water sealing part, the round bucket cannot leak water to corrode the bucket stator, when the round drum rotates, the drum shaft and the sealing copper sleeve bearing are in a water lubrication state, and a steel ball at the rear end of the drum shaft acts on overcoming the axial thrust generated by the magnetic force between the drum rotor and the bucket stator, so that a certain magnetic field gap is kept between the drum rotor and the bucket stator; the drum shaft of the existing drum-type washing machine needs to be sealed by a water sealing part, once the water sealing part is worn, a round water bucket leaks water to corrode a motor; the rear end of a round drum of the existing drum-type washing machine is supported by a drum shaft, the front end of the round drum is not supported, when the round drum rotates, the center of the front end of the round drum is in an unstable state, and clothes in the drum are dried to generate unbalanced eccentric force when rotating at high speed, so that the front end of the round drum is eccentric, larger unbalance is caused, and finally the round drum generates great vibration and noise; the low-noise drum type washing machine has the advantages that 4 rubber wheels of the low-noise drum type washing machine are matched with the positions equally distributed on the circumference of the barrel-shaped ring, the front end of the round drum is supported, the center of the front end of the round drum is stable, the drum shaft supports the rear end of the round drum, the center of the rear end of the round drum is stable, when the round drum rotates at a high speed, eccentric force generated by uneven distribution of clothes in the round drum acts on the 4 rubber wheels at the front end of the drum and the drum shaft at the rear end of the drum, the supporting strength of the rubber wheels and the drum shaft is high, the center positions of the front end and the rear end of the round drum cannot be changed due to eccentric force, vibration generated by the eccentric force cannot be increased, and vibration generated by the eccentric force is basically consumed on 4 shock absorbers, so that unbalanced vibration generated by the low-noise drum type washing machine is small, and noise is; the permanent magnet motor controls the rotating speed of the permanent magnet motor by adjusting the direct current voltage of the motor, the rotating speed of the round drum is very low during washing, the permanent magnet motor is powered by low voltage, the permanent magnet motor is gradually transited from low voltage to high voltage during dehydration and spin-drying of clothes, and the rotating speed of the round drum is gradually transited from low rotating speed to high rotating speed.

Drawings

FIG. 1 is a schematic view of the entire structure of a low noise drum type washing machine in a right side view.

Fig. 2 is a schematic diagram of a right-side sectional structure inside the round bucket.

Fig. 3 is a front view of the permanent magnet motor.

The following is further described with reference to the accompanying drawings.

Detailed Description

In fig. 1, 2 and 3, the low noise drum type washing machine is provided with a washing machine shell 1, a round water barrel 2 is arranged in the washing machine shell, an upper left shock absorber and an upper right shock absorber 3 are arranged in the middle of the upper end in the washing machine shell, a lower left shock absorber and a lower right shock absorber 4 are arranged in the middle of the lower end in the washing machine shell, 4 equally divided connecting lugs 5 are arranged in the middle of the round water barrel, the 4 equally divided connecting lugs are respectively connected with connecting shafts 6 of the 4 shock absorbers, the outer ends of the 4 shock absorbers are connected with upper corners and lower corners in the washing machine shell, the round water barrel is hung in the middle of the washing machine shell, a round drum 7 is arranged in the round water barrel, washing object inlets are respectively arranged in the centers of the front ends of the round drum, the round water barrel and the washing machine shell, a large round door is arranged at the inlet of the washing machine shell, a small, the cross-sectional patterns of the rubber sealing ring are an upper S shape and a lower S shape, the front end of the rubber sealing ring is a large circle which is connected with a large round door 9, the rear end of the rubber sealing ring is a small circle which is connected with a small round door, the inlet of a round roller is provided with a barrel-shaped ring 10, the rear end of the round roller is provided with a roller bottom 11, the barrel-shaped ring and the round roller are made of stainless steel products and are integrally manufactured and molded, and the outer circle of the barrel-shaped ring and the inner circle of the small circle keep a certain uniform interval; the permanent magnet motor comprises a roller rotor and a bucket stator, the roller rotor is installed at the rear end of a round roller, the bucket stator is installed at the rear end of the round bucket, a bucket bottom 12 is arranged at the rear end of the round bucket, a connecting sleeve 13 is arranged at the center of the bucket bottom, a sealing copper sleeve bearing 14 is installed in the connecting sleeve in a tight fit mode, a rear end cover 15 is arranged in the sealing copper sleeve bearing, a steel ball 16 is arranged at the front end of the rear end cover, a roller shaft 17 is arranged in the sealing copper sleeve bearing, a magnetic conductive disc 18 is connected to the front end of the roller shaft, the roller shaft and the magnetic conductive disc are concentric, the rear end of the roller shaft abuts against the steel ball, the front end of the magnetic conductive disc is installed at the bottom of the round roller, the magnetic conductive disc and the bucket bottom are concentric, the magnetic conductive disc and the bucket bottom are fastened and connected through 4 rivets 19, a permanent magnet ring 20 is arranged at the right, the polarities of the adjacent permanent magnets are opposite to each other, the permanent magnets are alternately arranged to form permanent magnet rings, the permanent magnet rings are adsorbed on the outer circumference of the right end face of the magnetic conductive disc and are fixedly bonded by AB glue, and the permanent magnet rings and the magnetic conductive disc form a roller rotor; the round bucket is formed by assembling a front semi-round bucket and a rear semi-round bucket, the front semi-round bucket and the rear semi-round bucket are plastic products, the rear semi-round bucket is provided with a connecting ring 21, the connecting ring is concentric with a connecting sleeve, the rear semi-round bucket, the connecting sleeve and the connecting ring are integrally injection-molded by high-strength plastics, a stator groove is arranged at the rear end of the bottom of the rear semi-round bucket, the stator groove is concentric with the connecting sleeve, and the thickness of the bottom of the stator groove is smaller than that of the bottom of the bucket; the water bucket stator is provided with a connecting ring 22, the front end of the connecting ring is welded with a drum-shaped iron core 23, the drum-shaped iron core is formed by silicon steel strips in a lap-winding mode, the front end of the drum-shaped iron core is provided with a plurality of coil grooves, a notch 24 is formed in the middle of the front end of each coil groove, the front end of the drum-shaped iron core is installed in a stator groove and is matched with the stator groove, the connecting ring is installed at the rear end of the connecting ring and is fastened by 4 stator screws 25, the size of the annular surface of a permanent magnet ring is the same as that of the annular surface of the drum-shaped iron core, the rear surface of the permanent magnet ring is aligned with the front surface of the drum-shaped iron core, a magnetic field air gap is formed between the permanent magnet ring and the drum-shaped iron core, the thickness of the tank bottom of the stator groove; the winding method comprises the following steps that a plurality of single coils are wound in coil grooves of a reel-shaped iron core, the single coils respectively form a three-phase armature coil 26, each phase of armature coil is formed by connecting a plurality of single coils in series, the winding directions of the adjacent single coils are opposite, the single coils are wound by using a plurality of strands of enameled wires, the electrical angle between the three-phase armature coils is 120 degrees, the three-phase armature coils are connected into Y-shaped circuit output, three Hall sensors 27 are respectively arranged in three grooves of the reel-shaped iron core, the spacing positions of the three Hall sensors are respectively different by 60 degrees in electrical angle, a three-phase output line and the output lines of the three Hall sensors are combined into a strand of output cable 28, a bucket stator is formed by a connecting ring, an annular iron core, the three-phase armature coils and the three Hall sensors, a wire outlet is formed in; the low-noise drum-type washing machine is provided with a supporting pulley for stabilizing a round drum, a left shaft hole and a right shaft hole are respectively arranged above a small round door, a connecting shaft 29 is respectively arranged in the left shaft hole and the right shaft hole, a left shaft hole and a right shaft hole are respectively arranged below the small round door, a lower connecting shaft 30 is respectively arranged in the left shaft hole and the right shaft hole, the specifications of the upper connecting shaft and the lower connecting shaft are the same, the middle part of the connecting shaft is provided with a positioning table 31, the front end of the positioning table is provided with an outer snap spring 32, the rear end of the positioning table is provided with a fastening nut 33, the connecting shafts are all provided with bearings 34, rubber wheels 35 are installed on the outer circles of the bearings, 4 rubber wheels are matched with the circumferences of the barrel-shaped rings at the front ends of the round rollers, the front ends of the round rollers are supported by the 4 rubber wheels at positions which are equally divided into the circumferences of the barrel-shaped rings, so that the centers of the front ends of the round rollers are stable, and the rear ends of the round rollers are supported by the roller shafts so that the centers of the rear ends of the round rollers are stable; the washing machine is characterized in that a computer box 36 is arranged at the front upper end in the shell of the washing machine, an operation panel 37 and a knob 38 are arranged at the front upper end outside the shell of the washing machine, a controller 39 and a power supply box 40 of a permanent magnet motor are arranged at the rear upper end in the shell of the washing machine, an output line of the motor is connected with the output end and the input end of the controller, a power supply end of the controller is connected with the power supply box, the operation panel and the knob are connected with the computer box, an output line of the computer box is connected with the input end of.

The low-noise drum-type washing machine adopts a low-speed brushless permanent magnet motor with an axial magnetic circuit to directly drive a round drum, a drum rotor of the permanent magnet motor and a bucket stator are in a mutually sealed isolation state, because a rear end cover is arranged on an inner circle of a sealing copper sleeve bearing, a drum shaft does not need to be sealed by a water sealing part, the round bucket cannot leak water to corrode the bucket stator, when the round drum rotates, the drum shaft and the sealing copper sleeve bearing are in a water lubrication state, and a steel ball at the rear end of the drum shaft acts on overcoming the axial thrust generated by the magnetic force between the drum rotor and the bucket stator, so that a certain magnetic field gap is kept between the drum rotor and the bucket stator; the drum shaft of the existing drum-type washing machine needs to be sealed by a water sealing part, once the water sealing part is worn, a round water bucket leaks water to corrode a motor; the rear end of a round drum of the existing drum-type washing machine is supported by a drum shaft, the front end of the round drum is not supported, when the round drum rotates, the center of the front end of the round drum is in an unstable state, and clothes in the drum are dried to generate unbalanced eccentric force when rotating at high speed, so that the front end of the round drum is eccentric, larger unbalance is caused, and finally the round drum generates great vibration and noise; the low-noise drum type washing machine has the advantages that 4 rubber wheels of the low-noise drum type washing machine are matched with the positions equally distributed on the circumference of the barrel-shaped ring, the front end of the round drum is supported, the center of the front end of the round drum is stable, the drum shaft supports the rear end of the round drum, the center of the rear end of the round drum is stable, when the round drum rotates at a high speed, eccentric force generated by uneven distribution of clothes in the round drum acts on the 4 rubber wheels at the front end of the drum and the drum shaft at the rear end of the drum, the supporting strength of the rubber wheels and the drum shaft is high, the center positions of the front end and the rear end of the round drum cannot be changed due to eccentric force, vibration generated by the eccentric force cannot be increased, and vibration generated by the eccentric force is basically consumed on 4 shock absorbers, so that unbalanced vibration generated by the low-noise drum type washing machine is small, and noise is; the permanent magnet motor controls the rotating speed of the permanent magnet motor by adjusting the direct current voltage of the motor, the rotating speed of the round drum is very low during washing, the permanent magnet motor is powered by low voltage, the permanent magnet motor is gradually transited from low voltage to high voltage during dehydration and spin-drying of clothes, and the rotating speed of the round drum is gradually transited from low rotating speed to high rotating speed.

Claims

1. The utility model provides a low noise drum type washing machine comprises washing machine casing, circle cask, circle cylinder, sealed copper sheathing bearing, support pulley and permanent-magnet machine, its characterized in that: the low-noise drum type washing machine is provided with a washing machine shell (1), a round water barrel (2) is arranged in the washing machine shell, an upper left shock absorber and an upper right shock absorber (3) are arranged in the middle of the upper end in the washing machine shell, a lower left shock absorber and a lower right shock absorber (4) are arranged in the middle of the lower end in the washing machine shell, connecting lugs (5) which are divided into 4 parts are arranged in the middle of the round water barrel, the connecting lugs which are divided into 4 parts are respectively connected with connecting shafts (6) of the 4 shock absorbers, the outer ends of the 4 shock absorbers are connected with upper and lower corners in the washing machine shell, the round water barrel is hung in the middle of the washing machine shell, a round drum (7) is arranged in the round water barrel, washing object inlets are respectively arranged in the centers of the front ends of the round drum, the round water barrel and the washing machine shell, a large round door is, the cross-sectional patterns of the rubber sealing ring are an upper S shape and a lower S shape, the front end of the rubber sealing ring is a large circle which is connected with a large round door (9), the rear end of the rubber sealing ring is a small circle which is connected with a small round door, a barrel-shaped ring (10) is arranged at the inlet of a round roller, the rear end of the round roller is provided with a roller bottom (11), the barrel-shaped ring and the round roller are made of stainless steel products and are integrally manufactured and molded, and the outer circle of the barrel-shaped ring and the inner circle of the small circle keep a certain uniform interval; the permanent magnet motor comprises a roller rotor and a bucket stator, the roller rotor is installed at the rear end of a round roller, the bucket stator is installed at the rear end of the round bucket, a bucket bottom (12) is arranged at the rear end of the round bucket, a connecting sleeve (13) is arranged at the center of the bucket bottom, a sealed copper sleeve bearing (14) is installed in the connecting sleeve in a tight fit mode, a rear end cover (15) is arranged in the sealed copper sleeve bearing, steel balls (16) are arranged at the front end of the rear end cover, a roller shaft (17) is arranged in the sealed copper sleeve bearing, a magnetic conductive disc (18) is connected to the front end of the roller shaft, the roller shaft and the magnetic conductive disc are concentric, the rear end of the roller shaft abuts against the steel balls, the front end of the magnetic conductive disc is installed at the bottom of the round roller, the magnetic conductive disc and the bucket bottom are concentric, the magnetic conductive disc and the bucket bottom are fixedly connected through 4 rivets (, the polarities of the fan-shaped permanent magnets are axial, the polarities of the adjacent permanent magnets are opposite to each other, the adjacent permanent magnets are alternately arranged to form permanent magnet rings, the permanent magnet rings are adsorbed on the outer circumference of the right end face of the magnetic conductive disc and are fixedly bonded by AB glue, and the permanent magnet rings and the magnetic conductive disc form a roller rotor; the round bucket is formed by assembling a front semi-round bucket and a rear semi-round bucket, the front semi-round bucket and the rear semi-round bucket are plastic products, the rear semi-round bucket is provided with a connecting ring (21), the connecting ring is concentric with a connecting sleeve, the rear semi-round bucket, the connecting sleeve and the connecting ring are integrally injection-molded by high-strength plastics, a stator groove is arranged at the rear end of the bottom of the rear semi-round bucket, the stator groove is concentric with the connecting sleeve, and the thickness of the bottom of the stator groove is smaller than that of the bottom of the bucket; the water bucket stator is provided with a connecting ring (22), the front end of the connecting ring is welded with a drum-shaped iron core (23), the drum-shaped iron core is formed by silicon steel strips in a lap-winding mode, a plurality of coil grooves are machined in the front end of the drum-shaped iron core, a notch (24) is formed in the middle of the front end of each coil groove, the front end of the drum-shaped iron core is installed in a stator groove and is matched with the stator groove, the connecting ring is installed at the rear end of the connecting ring and is fastened by 4 stator screws (25), the size of the annular surface of a permanent magnet ring is the same as that of the annular surface of the drum-shaped iron core, the rear surface of the permanent magnet ring is aligned with the front surface of the drum-shaped iron core, a magnetic field air gap is formed between the permanent magnet ring and the drum-shaped iron core, the thickness of the tank bottom of the stator groove is; a plurality of single coils are wound in a coil groove of the reel-shaped iron core, the single coils respectively form a three-phase armature coil (26), each phase of armature coil is formed by connecting a plurality of single coils in series, the winding directions of the adjacent single coils are opposite, the single coils are wound by a plurality of strands of enameled wires, the electrical angle between the three-phase armature coils is 120 degrees, the three-phase armature coils are connected into a Y-shaped circuit output, three Hall sensors (27) are respectively arranged in three notches of the drum-shaped iron core, the interval positions of the three Hall sensors are different by 60 degrees in electric angle, a three-phase output line and the output lines of the three Hall sensors are combined into a strand of output cable (28), a bucket stator is composed of a connecting ring, the drum-shaped iron core, a three-phase armature coil and the three Hall sensors, a wire outlet hole is formed in the upper end of the connecting ring, and the output cable penetrates out of the wire outlet hole; the low-noise drum type washing machine is provided with 4 supporting pulleys for stabilizing a circular drum, a left shaft hole and a right shaft hole are respectively arranged above a small circular door, a connecting shaft (29) is respectively arranged in the left shaft hole and the right shaft hole, a left shaft hole and a right shaft hole are respectively arranged below the small circular door, a lower connecting shaft (30) is respectively arranged in the left shaft hole and the right shaft hole, the specifications of the upper connecting shaft and the lower connecting shaft are the same, a positioning table (31) is arranged in the middle of each connecting shaft, an outer snap spring (32) is arranged at the front end of each positioning table, a fastening nut (33) is arranged at the rear end of each positioning table, a bearing (34) is arranged on each connecting shaft, rubber wheels (35) are arranged on the outer circle of each bearing, 4 rubber wheels are matched with the circumference of the cylindrical ring at the front end of the circular drum, the front end of the circular drum is supported by the 4 rubber wheels at positions which are equally distributed on, stabilizing the center of the rear end of the round roller; the front upper end in the shell of the washing machine is provided with a computer box (36), the front upper end outside the shell of the washing machine is provided with an operation panel (37) and a knob (38), the rear upper end in the shell of the washing machine is provided with a controller (39) and a power supply box (40) of a permanent magnet motor, an output line of the motor is connected with the output end and the input end of the controller, a power supply end of the controller is connected with the power supply box, the operation panel and the knob are connected with the computer box, an output line of the computer box is connected with the input end of the controller, and the rear end; the low-noise drum-type washing machine adopts a low-speed brushless permanent magnet motor with an axial magnetic circuit to directly drive a round drum, a drum rotor of the permanent magnet motor and a bucket stator are in a mutually sealed isolation state, the rear end of a sealing copper sleeve bearing is sealed, the bucket stator cannot be corroded by water leakage, the front end of the sealing copper sleeve bearing does not need to be sealed by a water seal piece, when the round drum rotates, a water lubrication state is formed between a drum shaft and the sealing copper sleeve bearing, and a steel ball at the rear end of the drum shaft has the function of overcoming the axial thrust generated by the magnetic force between the drum rotor and the bucket stator, so that a certain magnetic field gap is kept between the drum rotor and the bucket stator; the low-noise drum-type washing machine has the advantages that 4 rubber wheels of the low-noise drum-type washing machine are matched with the positions equally distributed on the circumference of the barrel-shaped ring, the front end of the round drum is supported, the center of the front end of the round drum is stable, the drum shaft supports the rear end of the round drum, the center of the rear end of the round drum is stable, when the round drum rotates at a high speed, eccentric force generated by uneven distribution of clothes in the round drum acts on the 4 rubber wheels at the front end of the round drum and the drum shaft at the rear end of the round drum, and because the supporting strength of the rubber wheels and the drum shaft is high, the center positions of the front end and the rear end of the round drum cannot be changed due to the eccentric force, vibration generated by the eccentric force cannot be increased, and vibration generated by the eccentric force is basically consumed on 4 shock absorbers, so that the low-noise drum-type washing machine generates small unbalanced; the permanent magnet motor controls the rotating speed of the permanent magnet motor by adjusting the direct current voltage of the motor, the rotating speed of the round drum is very low during washing, the permanent magnet motor is powered by low voltage, the permanent magnet motor is gradually transited from low voltage to high voltage during dehydration and spin-drying of clothes, and the rotating speed of the round drum is gradually transited from low rotating speed to high rotating speed.