CN-111884407-B - Permanent magnet synchronous direct-drive motor special for frequency conversion driving biochemistry and stator sealing treatment method

CN111884407BCN 111884407 BCN111884407 BCN 111884407BCN-111884407-B

Abstract

The invention discloses a frequency conversion driving biochemical special permanent magnet synchronous direct-drive motor and a stator sealing treatment method, which comprises a motor body arranged on the top of a reaction kettle, wherein the motor body comprises a motor shell, a rotor and a bearing assembly, two ends of the rotor are coaxially and rotatably arranged on the motor shell through the bearing assembly, the bearing assembly comprises a thrust cylindrical roller bearing and a cylindrical roller bearing which are sequentially arranged along the axial direction, the motor shell is of a closed shell structure with a double-layer structure, a water cooling cavity is formed between an inner wall body and an outer wall body of the motor shell, and a water inlet and a water outlet are formed in the motor shell and are communicated with the water cooling cavity. The motor body is subjected to water cooling through the water cooling cavity, so that working heat can be rapidly discharged, and the working stability and safety of the motor body are improved.

Inventors

CHU PENG
YAO YINGXIA
ZHU ZHENYI
CHEN YULIAN
ZHU SHENGLAN

Assignees

无锡欧瑞京电机有限公司

Dates

Publication Date: 20260505
Application Date: 20200713

Claims (5)

1. The special permanent magnet synchronous direct-drive motor for variable frequency drive biochemistry is characterized by comprising a motor body arranged on the top of a reaction kettle, wherein the motor body comprises a motor shell (15), a rotor (8) and a bearing assembly (5), two ends of the rotor (8) are coaxially and rotatably arranged on the motor shell (15) through the bearing assembly (5), the bearing assembly (5) comprises a thrust cylindrical roller bearing and a cylindrical roller bearing which are sequentially arranged along the axial direction, the motor shell (15) is of a closed shell structure with a double-layer structure, a water cooling cavity (12) is formed between the inner wall body and the outer wall body of the motor shell (15), and the motor shell (15) is communicated with the water cooling cavity (12) to form a water inlet (13) and a water outlet (14); The motor body further comprises a stator (7), wherein epoxy resin glue is coated outside the stator (7), the whole stator (7) is subjected to epoxy resin glue sealing treatment, and the epoxy resin glue can enhance the insulating capability of the stator (7); The motor comprises a motor body, a rotor (8) and a water cooling assembly, wherein the rotor (8) comprises a rotating shaft (16), a blind hole-shaped mounting cavity (21) is concavely arranged at the top end of the rotating shaft (16) along the axial direction, and a water cooling inner core assembly is arranged in the mounting cavity (21); The water-cooling inner core assembly comprises a water-cooling pipe (22) and a supporting inner core (23) which is arranged in the water-cooling pipe (22) in a fit penetrating mode, the supporting inner core (23) is of a rod body structure with a star-shaped cross section, the star-shaped supporting inner core (23) can internally support the water-cooling pipe (22), so that the strength of the water-cooling pipe (22) is increased, a water outlet flow channel (27) is formed between the supporting inner core (23) and the water-cooling pipe (22), the supporting inner core (23) is arranged at the interval of the bottom wall of the installation cavity (21), the supporting inner core (23) is axially communicated with a water inlet flow channel (24), and the water outlet flow channel (27) and the water inlet flow channel (24) are communicated.
2. The frequency conversion driving biochemical special permanent magnet synchronous direct-drive motor according to claim 1, wherein a vibration detection element or a temperature detection element (4) is arranged on the bearing assembly (5) facing one side of the reaction kettle.
3. The variable frequency driving biochemical special permanent magnet synchronous direct-drive motor is characterized in that the motor shell (15) comprises an inner shell (17), an outer shell (18) and a partition plate (19), a closed water cooling cavity (12) is formed between the inner shell and the outer shell, the partition plate (19) is arranged between the water cooling cavities (12) in parallel with the axial direction, the water inlet (13) and the water outlet (14) are respectively arranged on two sides of the partition plate (19), a plurality of guide plates (20) are arranged in the water cooling cavities (12) in parallel with the axial circumferential array, and the guide plates (20) are arranged in an S-shaped staggered mode and form a cooling flow channel.
4. The variable frequency driving biochemical special permanent magnet synchronous direct-drive motor according to claim 1, wherein a sealing seat (25) is sleeved outside one side of the water cooling pipe (22) close to the water inlet end, the sealing seat (25) is of a ring-shaped structure with a U-shaped section, the opening side of the sealing seat and the water cooling pipe (22) are rotatably and hermetically arranged, a plurality of water cooling outlets (26) are formed in an inner cavity communicated with the sealing seat (25) on the wall body of the water cooling pipe (22), and the water cooling outlets (26) are communicated with a water outlet runner (27).
5. A special permanent magnet synchronous direct-drive motor for variable frequency drive biochemistry is characterized in that the whole stator is subjected to epoxy resin glue sealing treatment, wherein a water inlet and a water outlet of a machine seat in the stator are plugged by a plug, the water pressure of the machine seat is kept at 1MPa, the pressure is kept for 5 minutes, no water leakage of a water channel of the machine seat is ensured, a wire outlet of the machine seat is plugged, a cylindrical tool is manufactured in an inner hole of the stator, the outer circle of the tool is 0.3-0.4 mm smaller than the single side of the inner hole of the stator, the axial direction is 15-20 mm higher than the end part of a coil, a plastic film is filled between the tool and the inner hole of the stator, the two end parts of the stator are respectively poured into the prepared epoxy resin, the epoxy resin is cured after being waited, after demoulding, the inner circle and the end part of the stator are machined, and the redundant cured epoxy resin is removed.

Description

Permanent magnet synchronous direct-drive motor special for frequency conversion driving biochemistry and stator sealing treatment method Technical Field The invention belongs to the field of motors, and particularly relates to a special permanent magnet synchronous direct-drive motor for variable frequency drive biochemistry. Background With the continuous development of the national biochemical industry, the demand of the biochemical special motor is larger and larger, as shown in the attached figure 1, the biochemical special motor is a biochemical three-phase asynchronous motor and a mounting schematic diagram of the biochemical special motor and a reaction kettle in the prior art, because the rotating speed of a driving motor body is higher, enough torque cannot be generated to drive a stirring shaft, the rotating shafts of the driving motor and the reaction kettle are required to be decelerated through belt pulleys, more transmission devices bring more energy loss, and the high-speed three-phase asynchronous motor has large noise, low power factor and large reactive power loss, and the motor body generates more heat during working, so that the motor body is very easy to damage if the motor body cannot dissipate heat in time. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides the special permanent magnet synchronous direct-drive motor for variable frequency drive biochemistry, which can reduce energy consumption, greatly improve power factors, reduce noise and conduct efficient heat dissipation on a motor body. The technical scheme is that in order to achieve the purposes, the technical scheme of the invention is as follows: the utility model provides a biochemical special permanent magnet synchronous direct drive motor of variable frequency drive, includes the motor body that sets up on the reation kettle top, the motor body contains motor housing, rotor and bearing assembly, the coaxial rotation setting of bearing assembly is passed through on the motor housing in both ends of rotor, the bearing assembly includes thrust cylindrical roller bearing and cylindrical roller bearing that set gradually along the axial, the motor housing is bilayer structure's closed shell structure, constitute the water-cooling chamber between the interior of motor housing, the outer wall body, the intercommunication on the motor housing the water-cooling chamber has seted up water inlet and delivery port. Further, the motor body further comprises a stator, and epoxy resin glue is coated outside the stator. Further, a vibration detecting element or a temperature detecting element is arranged on the bearing assembly facing one side of the reaction kettle. Further, the motor shell comprises an inner shell, an outer shell and a partition plate, wherein a closed water cooling cavity is formed between the inner shell and the outer shell, the partition plate is arranged between the water cooling cavities in parallel with the axial direction, the water inlet and the water outlet are respectively formed in two sides of the partition plate, a plurality of guide plates are arranged in the water cooling cavity in parallel with the axial circumferential array, and the guide plates are arranged in an S-shaped staggered mode and form a cooling flow channel. Further, still include rotor water-cooling subassembly, the rotor contains the pivot, the top of pivot is equipped with blind hole form's installation cavity along the axial indent, be provided with water-cooling inner core assembly in the installation cavity. Further, the water-cooling inner core assembly comprises a water-cooling pipe and a supporting inner core arranged in the water-cooling pipe in a penetrating mode, the supporting inner core is of a rod body structure with a star-shaped section, a water outlet flow channel is formed between the supporting inner core and the water-cooling pipe, the distance between the supporting inner cores is set in the bottom wall of the installation cavity, and the supporting inner core is axially penetrated and provided with a water inlet flow channel. Further, one side outer ring sleeve that the water-cooled tube is close to the water inlet end is provided with a sealing seat, the sealing seat is of an annular structure with a U-shaped section, the opening side of the sealing seat and the water-cooled tube are in rotary sealing arrangement, the wall body of the water-cooled tube is communicated with the inner cavity of the sealing seat is provided with a plurality of water-cooled outlets, and the water-cooled outlets are communicated with the water outlet flow channel. The stator is integrally sealed by epoxy resin, wherein the sealing treatment mode is that a water inlet and a water outlet of a machine seat in the stator are plugged by a plug, the water pressure of the machine seat is kept at 1MPa, the pressure is maintained for 5 minutes, no water leakage of a water channel of the machine seat