CN214412513U

CN214412513U - Long-life electrically operated valve reduction gear

Info

Publication number: CN214412513U
Application number: CN202120557295.8U
Authority: CN
Inventors: 王强; 高树坤
Original assignee: Shandong Qixin Intelligent Control Technology Co ltd
Current assignee: Shandong Qixin Intelligent Control Technology Co ltd
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-10-15
Anticipated expiration: 2031-03-18

Abstract

The utility model relates to an electric valve speed reducer technical field, concretely relates to long-life electric valve speed reducer, including motor and reduction gear drive mechanism (2), the motor is DC brushless motor (1), DC brushless motor (1) includes stator, rotor and PCB board (3), the upper surface of PCB board (3) is connected with rotor position sensor one (31) and rotor position sensor two (32); the stator is arranged above the PCB (3), fixing holes are formed in positions of the stator corresponding to the PCB (3), and the stator and the PCB (3) are fixed on the upper surface of the speed reducer support (21) through the fixing holes by using fixing screws (4); compared with the prior art, the utility model has the advantages that: the electric valve speed reducer adopts a direct-current brushless motor, so that abrasion between the carbon brush and the commutator is avoided, the failure rate of the electric valve speed reducer is greatly reduced, the reliability is enhanced, and the service life is longer.

Description

Long-life electrically operated valve reduction gear

Technical Field

The utility model relates to an electric valve reduction gear technical field, concretely relates to long-life electric valve reduction gear.

Background

The traditional motor valve reducer is composed of a direct current motor, reduction gears of various stages and other frame parts. The direct current motor provides power, the traditional direct current motor is a brush direct current motor, the manufacturing cost is high, the structure is complex, the use and the maintenance are inconvenient, the complex structure limits the further reduction of the volume and the weight of the direct current motor, especially, the sliding contact of the brush and a commutator causes mechanical abrasion and spark, the direct current motor has more faults, low reliability and short service life. The commutation sparks cause both large galvanic corrosion of the commutator and a source of radio interference, which can have a detrimental effect on surrounding electrical equipment. The larger the motor volume and the higher the rotation speed, the more serious the problem.

Disclosure of Invention

In order to realize solving traditional motor valve reduction gear trouble many, the reliability is low, the short-lived technical problem of waiting, propose the utility model discloses the scheme:

a long-life electric valve speed reducer comprises a motor and a speed reducer transmission mechanism, wherein the speed reducer transmission mechanism comprises a speed reducer support, the motor is a direct-current brushless motor, the direct-current brushless motor comprises a stator, a rotor and a horizontal PCB, and the upper surface of the PCB is connected with a first rotor position sensor and a second rotor position sensor; the stator is arranged above the PCB, fixing holes are formed in the positions, corresponding to the PCB, of the stator, and the stator and the PCB are fixed on the upper surface of the speed reducer support through the fixing holes by using fixing screws; the rotor comprises an outer rotor shaft and a motor gear, and the outer rotor shaft vertically and downwards sequentially penetrates through the PCB and the upper surface of the speed reducer support; the motor gear is arranged at the lower end of the outer rotor shaft and is meshed with a gear of the speed reducer transmission mechanism; the first rotor position sensor and the second rotor position sensor are positioned on an arc of a circle, and the center of the circle is positioned on the axis of the outer rotor shaft; the radius of the circle where the first rotor position sensor and the second rotor position sensor are located is perpendicular to each other.

Preferably, the stator comprises a stator cushion, a winding stator and an oil bearing, wherein the stator cushion is cuboid and square in cross section; the number of the winding stators is four, each winding stator is composed of a stator core and a winding, and the four stator cores are respectively and vertically and fixedly connected with four side surfaces of the stator cushion; the oil-containing bearing is arranged in the center of the cross section of the stator cushion; and bolt fixing holes are respectively formed in four corners of the cross section of the stator cushion.

Preferably, the rotor further comprises an outer rotor metal shell and a permanent magnet ring, the outer rotor shaft is vertically installed in the oil-retaining bearing, and two ends of the outer rotor shaft in the length direction extend out of the oil-retaining bearing; the upper end of the outer rotor shaft is fixedly connected with the center of an inverted cylindrical outer rotor metal shell, and the permanent magnet ring is fixedly connected with the inner wall of the outer rotor metal shell.

Preferably, the stator corresponds position department with the PCB board and all sets up the fixed orifices, through the fixed orifices utilizes the set screw to fix stator, PCB board at reduction gear support upper surface, specifically is: the fixing holes are formed in the positions, corresponding to the bolt fixing holes, of the four corners of the cross section of the stator cushion, of the PCB, and the fixing screws sequentially penetrate through the bolt fixing holes of the stator cushion and the fixing holes of the PCB from top to bottom to fix the stator and the PCB on the upper surface of the speed reducer support.

Preferably, the four stator cores are divided into two groups, namely a stator arm I and a stator arm II; the first stator arm and the second stator arm are respectively composed of two stator cores on a straight line.

Preferably, the permanent magnet ring is divided into an N pole part and an S pole part.

The utility model discloses an electric valve reduction gear compares in prior art, and beneficial effect is:

(1) the utility model discloses a long-life electric valve reduction gear adopts direct current brushless motor, avoids the wearing and tearing of carbon brush and commutator for electric valve reduction gear's fault rate reduces by a wide margin, reliability enhancement, life is longer.

(2) The utility model discloses a long-life electric valve reduction gear has avoided the electric corrosion problem that the switching-over spark caused the commutator in traditional electric valve reduction gear working process.

(3) The utility model discloses a long-life electric valve reduction gear has avoided the problem that the switching-over spark becomes the radio interference source in traditional electric valve reduction gear working process.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

FIG. 1 is a first longitudinal cross-sectional view of a long life electrically operated valve reducer;

FIG. 2 is a second longitudinal cross-sectional view of the long life electrically operated valve reducer;

fig. 3 is a transverse sectional view of the dc brushless motor;

fig. 4 is a top view of a stator of the dc brushless motor;

fig. 5 is a perspective view of a stator of the dc brushless motor;

FIG. 6 is a schematic view of a rotor of a brushless DC motor;

FIG. 7 is a schematic diagram of a first rotor position sensor and a second rotor position sensor on a PCB.

In the figure: 1-a direct current brushless motor, 11-a stator core, 12-a stator cushion, 13-an outer rotor shaft, 14-a motor gear, 15-an outer rotor metal shell, 16-a permanent magnet ring, 17-a winding, 18-an oil-retaining bearing, 111-a stator arm I and 112-a stator arm II;

2-a reducer transmission mechanism, 21-a reduction structure support;

3-PCB board, 31-rotor position sensor I, 32-rotor position sensor II.

The specific implementation mode is as follows:

in order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations of the specific embodiments of the present disclosure.

Example 1

As shown in fig. 1-2, the long-life electrically operated valve speed reducer of the present embodiment includes a motor and a speed reducer transmission mechanism 2, where the speed reducer transmission mechanism 2 includes a speed reducer support 21, the motor is a dc brushless motor 1, the dc brushless motor 1 includes a stator, a rotor and a horizontal PCB 3, and a first rotor position sensor 31 and a second rotor position sensor 32 are connected to an upper surface of the PCB 3.

As shown in fig. 1-2, the stator is installed above the PCB 3, and the stator and the PCB 3 are provided with fixing holes at corresponding positions, and the stator and the PCB 3 are fixed on the upper surface of the reducer bracket 21 by fixing screws 4 through the fixing holes.

As shown in fig. 1-2, the rotor includes an outer rotor shaft 13 and a motor gear 14, the outer rotor shaft 13 vertically passes downward through the upper surface of the reducer bracket 21; the motor gear 14 is installed at the lower end of the outer rotor shaft 13 and is engaged with the gear of the reducer transmission mechanism 2.

As shown in fig. 7, the first rotor position sensor 31 and the second rotor position sensor 32 are located on an arc of a circle having a center on the axis of the outer rotor shaft 13; the radius of the circle where the first rotor position sensor 31 and the second rotor position sensor 32 are located is perpendicular to each other.

As shown in fig. 3 to 5, the stator includes a stator pad 12, a winding stator, and an oil bearing 18, the stator pad 12 having a rectangular parallelepiped shape and a square cross section; the number of the winding stators is four, each winding stator is composed of a stator core 11 and a winding 17, and the four stator cores 11 are respectively and vertically and fixedly connected with four side surfaces of the stator cushion 12; an oil bearing 18 is arranged at the center of the cross section of the stator cushion 12; bolt fixing holes are respectively formed in four corners of the cross section of the stator cushion 12.

As shown in fig. 1, 2 and 6, the rotor further comprises an outer rotor metal shell 15 and a permanent magnet ring 16, the outer rotor shaft 13 is vertically installed in an oil-containing bearing 18, and both ends of the outer rotor shaft 13 in the length direction extend out of the oil-containing bearing 18; the upper end of the outer rotor shaft 13 is fixedly connected with the center of an inverted cylindrical outer rotor metal shell 15, and the permanent magnet ring 16 is fixedly connected with the inner wall of the outer rotor metal shell 15.

The stator corresponds position department with PCB board 3 and all sets up the fixed orifices, utilizes fixed screw 4 to fix stator, PCB board 3 at reduction gear support 21 upper surface through the fixed orifices, specifically does: the positions of the PCB 3 corresponding to the bolt fixing holes at the four corners of the cross section of the stator cushion 12 are provided with fixing holes, and the fixing screws 4 sequentially penetrate through the bolt fixing holes of the stator cushion 12 and the fixing holes of the PCB 3 from top to bottom to fix the stator and the PCB 3 on the upper surface of the speed reducer support 21.

As shown in fig. 3-5, the four stator cores 11 are divided into two groups, i.e., a first stator arm 111 and a second stator arm 112; the first stator arm 111 and the second stator arm 112 are respectively composed of two stator cores 11 which are in a straight line.

Long-life electrically operated valve reduction gear principle: the PCB 3 is used for controlling the stator and the rotor of the brushless DC motor 1, the PCB 3 is provided with a motor control circuit (comprising a single chip microcomputer, a motor driving chip and the like are not shown in the figure), a first rotor position sensor 31 and a second rotor position sensor 32 on the PCB 3 can sense the moving direction of the rotor, the polarities of a first stator arm 111 and a second stator arm 112 are changed by changing the current flowing through a winding 17, and the rotor continuously rotates by utilizing the principle that like poles repel each other and opposite poles attract each other.

As shown in fig. 3, the permanent magnet ring in the outer rotor is divided into two parts, i.e., an N pole and an S pole.

The voltage direction determines the rotation direction of the brushless DC motor, and the voltage magnitude determines the rotation speed of the brushless DC motor. There are two windings 17 on each of stator arm 111 and stator arm 112. Taking the stator arm 111 as an example, when a forward voltage is applied to two windings on the stator arm 111, two ends of the stator arm 111 are represented as N and S poles respectively; when reverse voltage is applied to the two windings on the stator arm 111, the two ends of the stator arm 111 respectively present S and N poles (polarity reversal); the same applies to stator arm 112.

The motor rotates anticlockwise:

when the first rotor position sensor 31 detects that the N pole of the permanent magnet ring 16 of the rotor is in place, the stator arm 112 is powered on by positive voltage, the stator arm 111 is not powered on, the rotor rotates anticlockwise (the N pole of the permanent magnet ring 16 and the N pole of the stator arm 112 are repelled), after the rotor rotates anticlockwise, the rotor position sensor 32 detects that the S pole of the permanent magnet ring 16 of the rotor is in place, the stator arm 112 is powered off, the stator arm 111 is powered on by positive voltage, and the rotor continues to rotate anticlockwise. So that the rotor rotates counterclockwise without stop.

The motor rotates clockwise:

when the first rotor position sensor 31 detects that the N pole of the rotor permanent magnet ring 16 is in place, the stator arm 112 is energized with reverse voltage, and the stator arm 111 is not energized. The rotor rotates clockwise (the N pole of the permanent magnet ring 16 is attracted to the S pole of the stator arm 112), after the rotor rotates clockwise, the rotor position sensor 32 detects that the N pole of the rotor is in place, the stator arm 112 is powered off, the stator arm 111 is powered on by positive voltage, and the rotor continues to rotate clockwise. So that the rotor is continuously rotated clockwise.

The rotor of the brushless DC motor 1 rotates anticlockwise and clockwise to drive the speed reducer transmission mechanism 2 to open and close the gate.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiments into equivalent variations to apply to other fields, but all the modifications and equivalent variations that do not depart from the technical contents of the present invention are still within the scope of the present invention.

Claims

1. A long-life electric valve speed reducer comprises a motor and a speed reducer transmission mechanism (2), wherein the speed reducer transmission mechanism (2) comprises a speed reducer support (21), and is characterized in that the motor is a direct-current brushless motor (1), the direct-current brushless motor (1) comprises a stator, a rotor and a horizontal PCB (3), and a first rotor position sensor (31) and a second rotor position sensor (32) are connected to the upper surface of the PCB (3);

the stator is arranged above the PCB (3), fixing holes are formed in positions of the stator corresponding to the PCB (3), and the stator and the PCB (3) are fixed on the upper surface of the speed reducer support (21) through the fixing holes by using fixing screws (4);

the rotor comprises an outer rotor shaft (13) and a motor gear (14), and the outer rotor shaft (13) vertically and downwards sequentially penetrates through the PCB (3) and the upper surface of the speed reducer bracket (21); the motor gear (14) is arranged at the lower end of the outer rotor shaft (13) and is meshed with a gear of the speed reducer transmission mechanism (2);

the first rotor position sensor (31) and the second rotor position sensor (32) are positioned on an arc of a circle, and the center of the circle is on the axis of the outer rotor shaft (13); the radius of the circle where the first rotor position sensor (31) and the second rotor position sensor (32) are located is perpendicular to each other.

2. The long life electrically operated valve reducer according to claim 1 wherein said stator comprises a stator pad (12), a winding stator and an oil bearing (18), said stator pad (12) being rectangular and square in cross-section; the number of the winding stators is four, each winding stator is composed of a stator core (11) and a winding (17), and the four stator cores (11) are respectively and vertically and fixedly connected with four side surfaces of the stator cushion (12); the oil bearing (18) is arranged in the center of the cross section of the stator cushion (12); and bolt fixing holes are respectively formed in four corners of the cross section of the stator cushion (12).

3. The long-life electrically operated valve reducer according to claim 2, wherein said rotor further comprises an outer rotor metal shell (15) and a permanent magnet ring (16), said outer rotor shaft (13) is vertically installed in an oil-retaining bearing (18), and both ends of said outer rotor shaft (13) in the length direction protrude out of the oil-retaining bearing (18); the upper end of the outer rotor shaft (13) is fixedly connected with the center of an inverted cylindrical outer rotor metal shell (15), and the permanent magnet ring (16) is fixedly connected with the inner wall of the outer rotor metal shell (15).

4. The long-life electrically operated valve retarder according to any of claims 2 or 3, wherein the fixing holes are formed at positions corresponding to the bolt fixing holes at the four corners of the cross section of the stator cushion (12) of the PCB plate (3), and the fixing screws (4) sequentially penetrate through the bolt fixing holes of the stator cushion (12) and the fixing holes of the PCB plate (3) from top to bottom to fix the stator and the PCB plate (3) on the upper surface of the retarder bracket (21).

5. The long life electrically operated valve reducer according to claim 2, characterized in that said four stator cores (11) are divided into two groups, one stator arm one (111) and two stator arms two (112); the first stator arm (111) and the second stator arm (112) are respectively composed of two stator cores (11) which are positioned on a straight line.

6. A long life electrically operated valve reducer according to claim 3 wherein said permanent magnet ring (16) is divided into two sections of N and S poles.