阅读说明：本技术 人工复位大扭矩盘式电机驱动直行程式切断执行装置 (Manual reset large-torque disc type motor driving straight stroke type cut-off executing device ) 是由 田中山 赖少川 杨昌群 王永飞 赵升吨 牛道东 张晨 高伟 杜一凡 于 2020-03-03 设计创作，主要内容包括：本发明公开了一种人工复位大扭矩盘式电机驱动直行程式切断执行装置,包括壳体,所述壳体内设有动力机构、动力切换机构、传动系统；所述动力机构带动传动系统实现行程输出；所述动力机构包括电力驱动系统和手动操作系统；所述动力切换机构用于实现电力驱动系统和手动操作系统之间的切换。本发明用于在停电或者在调试、电机故障等非停电场合时,向上拨动拨叉可以将手轮通过行星减速器与螺母相连,从而实现手动控制。当在非停电场合使用手动操作功能时,向上拨动拨叉,角度传感器发出电信号,控制系统对电机和抱闸机构进行断电,从而提高电动执行机构的使用安全性。(The invention discloses a manual reset large-torque disc type motor driving straight stroke type cutting-off executing device which comprises a shell, wherein a power mechanism, a power switching mechanism and a transmission system are arranged in the shell; the power mechanism drives the transmission system to realize stroke output; the power mechanism comprises an electric drive system and a manual operation system; the power switching mechanism is used for realizing switching between an electric drive system and a manual operation system. The invention is used for shifting the shifting fork upwards to connect the hand wheel with the nut through the planetary reducer in the case of power failure or in the non-power-failure occasions such as debugging, motor failure and the like, thereby realizing manual control. When the manual operation function is used in the non-power-off occasion, the shifting fork is shifted upwards, the angle sensor sends an electric signal, and the control system cuts off the power of the motor and the band-type brake mechanism, so that the use safety of the electric actuating mechanism is improved.)

1. The utility model provides a big moment of torsion disk motor drive straight stroke formula of manual reset cuts off final controlling element which characterized in that:

comprises a shell (3),

a power mechanism, a power switching mechanism and a transmission system are arranged in the shell (3);

the power mechanism drives the transmission system to realize stroke output;

the power mechanism comprises an electric drive system and a manual operation system;

the power switching mechanism is used for realizing switching between an electric drive system and a manual operation system.

2. The manual reset large-torque disc type motor-driven straight-stroke type cutting-off executing device according to claim 1, characterized in that:

the electric drive system comprises a disc type motor, wherein the disc type motor comprises a first disc type motor rotor (15), a second disc type motor rotor (16) and a disc type motor stator (18), and the disc type motor stator (18) is installed on the shell (3) through bolts and forms an air gap with the first disc type motor rotor (15) and the second disc type motor rotor (16).

3. The manual reset large-torque disc type motor-driven straight-stroke type cutting-off executing device according to claim 2, characterized in that:

the manual operation system comprises a hand wheel (1) and a speed reducer, wherein the hand wheel (1) is arranged on the shell (3) through a first bearing (2);

the speed reducer comprises a planetary gear set, the planetary gear set comprises a sun gear (4), the sun gear (4) is fixedly connected with a hand wheel (1), the sun gear (4) is meshed with a planetary gear (5) and a gear ring (6), the planetary gear (5) is installed on a planetary carrier (7), the gear ring (6) is fixedly connected with a shell (3), and the planetary carrier (7) is installed on the shell (3) through a second bearing (8).

4. The manual reset large-torque disc type motor-driven straight-stroke type cutting-off executing device according to claim 3, characterized in that:

the transmission system comprises an internal thread shaft (9) and a lead screw (17), the internal thread shaft (9) is in thread transmission fit with the lead screw (17), the internal thread shaft (9) is rotatably mounted on the shell (3) through a third bearing (13) and a fourth bearing (14), and a first rotor (15) of the disc motor is fixedly connected with a second rotor (16) of the disc motor and the internal thread shaft (9).

5. The manual reset large-torque disc type motor-driven straight-stroke type cut-off execution device as claimed in claim 4, wherein:

the power switching mechanism comprises a joint sleeve (10) and a shifting fork (11), and an external spline which can be matched with an internal spline in the joint sleeve (10) is processed at one end of the planet carrier (7) and one end of the internal thread shaft (9);

the joint sleeve (10) can move up and down along the axial direction under the action of a shifting fork (11) so as to control the joint and the separation of the planet carrier (7) and the internal thread shaft (9), and the shifting fork (11) is arranged on the shell (3) and is provided with an angle sensor (12).

6. The manual reset large-torque disc type motor-driven straight-stroke type cut-off execution device as claimed in claim 5, wherein:

the electromagnetic band-type brake is characterized by further comprising an electromagnetic band-type brake mechanism (19), wherein the electromagnetic band-type brake mechanism (19) comprises a friction plate (191) and an electromagnet (192), the friction plate (191) is connected with the internal thread shaft (9) through a thrust bearing (20) and a key, and the electromagnet (192) is fixedly connected with the shell (3).

7. The manual reset large-torque disc type motor-driven straight-stroke type cut-off execution device as claimed in claim 6, wherein:

the lead screw (17) is matched with the shell (3) through a square guide rail.

Technical Field

The invention relates to the technical field of electric actuating mechanisms, in particular to a manual reset large-torque disc type motor-driven straight-stroke type cutting-off actuating device.

Background

In recent years, with the increasing safety requirements in process automation control processes, the safety requirements for large-diameter valves in petroleum and petrochemical systems in particular have become very urgent. The actuator is used as an end actuating mechanism of a control system, and the working reliability of the actuator directly influences the performance level and safety of the whole system.

The large-torque quick turn-off device used in the current market is mainly a pneumatic actuator, an electro-hydraulic actuator and the like. Compared with a pneumatic actuator and an electro-hydraulic actuator, the electric actuator has the advantages of less maintenance workload, low price, easier cable laying than air path and oil path laying, no air leakage or oil leakage, wide application environment temperature range and the like.

Although electric actuators have many advantages, there are still some problems to be solved by the current electric actuators:

(1) the common motor used by the electric actuator has smaller torque, and a speed reduction transmission mechanism is needed to reduce the speed and increase the torque, so that the electric actuator has a complex structure, larger volume and reduced working efficiency;

(2) the manual operation switching mechanism of the electric actuator is complex, the failure rate of the switching mechanism is high, the torque required by the manual operation mechanism is large, and the operation is laborious;

(3) in some non-power-off occasions, such as debugging, motor faults and the like, a manual operation mechanism is also needed to control the valve, and certain safety risk exists if the motor cannot be automatically powered off when manual switching is performed.

Disclosure of Invention

The invention provides a manual reset large-torque disc type motor-driven straight-stroke type cut-off executing device, which adopts a permanent magnet axial magnetic flux motor with low speed, large torque and high energy density as a driving motor of an electric executing mechanism, directly drives a lead screw nut to act, integrates the lead screw nut into the motor, greatly simplifies the transmission structure of an electric actuator, and improves the working efficiency, the response speed and the control precision of the electric actuator.

The technical scheme for solving the problems is as follows: a manual reset large-torque disc type motor driving straight stroke type cutting-off executing device is characterized in that:

the power mechanism, the power switching mechanism and the transmission system are arranged in the shell; the power mechanism drives the transmission system to realize stroke output; the power mechanism comprises an electric drive system and a manual operation system; the power switching mechanism is used for realizing switching between an electric drive system and a manual operation system.

Further, the electric drive system comprises a disc motor, wherein the disc motor comprises a disc motor first rotor, a disc motor second rotor and a disc motor stator, and the disc motor stator is mounted on the shell through bolts and forms an air gap with the disc motor first rotor and the disc motor second rotor.

Furthermore, the manual operation system comprises a hand wheel and a speed reducer, wherein the hand wheel is arranged on the shell through a first bearing;

the speed reducer comprises a planetary gear set, the planetary gear set comprises a sun gear, the sun gear is fixedly connected with a hand wheel, the sun gear is meshed with a planetary gear and a gear ring, the planetary gear is mounted on a planetary carrier, the gear ring is fixedly connected with the shell, and the planetary carrier is mounted on the shell through a second bearing.

Furthermore, the transmission system comprises an internal thread shaft and a lead screw, the internal thread shaft is in thread transmission fit with the lead screw, the internal thread shaft is rotatably arranged on the shell through a third bearing and a fourth bearing, and the first rotor of the disc type motor and the second rotor of the disc type motor are fixedly connected with the internal thread shaft.

Furthermore, the power switching mechanism comprises a joint sleeve and a shifting fork, and an external spline is processed at one end of the planet carrier and one end of the internal thread shaft and can be matched with an internal spline in the joint sleeve;

the joint sleeve can move up and down along the shaft under the action of a shifting fork, so that the joint and the separation of the planet carrier and the internal thread shaft are controlled, and the shifting fork is arranged on the shell and provided with an angle sensor.

The electromagnetic band-type brake mechanism comprises a friction plate and an electromagnet, the friction plate is connected with the internal thread shaft through a thrust bearing and a key, and the electromagnet is fixedly connected with the shell.

Further, the lead screw is matched with the shell through a square guide rail so as to prevent the lead screw from rotating relative to the shell.

The invention has the advantages that:

(1) the permanent magnet axial flux motor with low speed, large torque and high energy density is used as the driving motor of the electric actuator, the lead screw nut is directly driven to act, and the lead screw nut is integrated into the motor, so that the transmission structure of the electric actuator is greatly simplified, and the working efficiency, the response speed and the control precision of the electric actuator are improved;

(2) the invention designs a clutch mechanism of a shifting fork and a joint sleeve to realize automatic and manual gear control, and when the shifting fork is shifted downwards, the ball screw mechanism is only connected with the motor, and is electrically controlled at the moment. When the shifting fork is pulled upwards, the hand wheel and the planetary reduction mechanism can be connected with the screw rod mechanism, so that manual control is realized. The clutch mechanism is simple and reliable, and the planetary gear speed reducing mechanism greatly reduces the torque required by operating the hand wheel, so that the operation is labor-saving and convenient;

(3) the shifting fork mechanism is provided with the angle sensor, when the shifting fork is shifted upwards to connect the hand wheel, the planetary reduction mechanism and the lead screw mechanism to realize manual control, the control system can automatically cut off the power of the motor and the band-type brake mechanism according to signals obtained by the angle sensor, and therefore the use safety of the electric actuating mechanism is improved.

Drawings

Fig. 1 is a schematic cross-sectional structure of the present invention.

Figure 2 is a schematic isometric cut-away view of the present invention.

The reference numbers in the figures illustrate: 1. a hand wheel; 2. a first bearing; 3. a housing; 4. a sun gear; 5. a planet wheel; 6. a ring gear; 7. a planet carrier; 8. a second bearing; 9. an internally threaded shaft; 10. a joint sleeve; 11. a shifting fork; 12. an angle sensor; 13. a third bearing; 14. a fourth bearing; 15. a disc motor first rotor; 16. a disc motor second rotor; 17. a lead screw; 18. a disc motor stator; 19. an electromagnetic band-type brake mechanism; 191. a friction plate; 192. an electromagnet; 20. and a thrust bearing.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Referring to fig. 1 and 2, the manual reset large-torque disc type motor driving straight stroke type cutting-off execution device comprises a hand wheel 1, wherein the hand wheel 1 is installed on a shell 3 through a first bearing 2 and is connected with a sun wheel 4 through a flat key, the sun wheel 4 is meshed with a planet wheel 5 and a gear ring 6, the planet wheel 5 is installed on a planet carrier 7, the gear ring 6 is fixedly connected with the shell 3, and the planet carrier 7 is installed on the shell 3 through a second bearing 8. An external spline is processed at one end of the planet carrier 7 and one end of the internal thread shaft 9 and can be matched with an internal spline in the joint sleeve 10, the joint sleeve 10 can move up and down along the axial direction under the action of the shifting fork 11, so that the engagement and the separation of the planet carrier 7 and the internal thread shaft 9 are controlled, and the shifting fork 11 is installed on the shell 3 and is provided with an angle sensor 12.

The inner threaded shaft 9 is rotatably mounted on the shell 3 through a third bearing 13 and a fourth bearing 14, the first rotor 15 of the disc motor and the second rotor 16 of the disc motor are fixedly connected with the inner threaded shaft 9, a threaded hole is formed in the inner portion of the inner threaded shaft 9 and forms threaded transmission fit with the lead screw 17, and the stator 18 of the disc motor is mounted on the shell 3 through bolts and forms an air gap with the first rotor 15 of the disc motor and the second rotor 16 of the disc motor. The lower end of the internal thread shaft 9 is provided with an electromagnetic band-type brake mechanism 19.

The electromagnetic band-type brake mechanism 19 comprises a friction plate 191 and an electromagnet 192, the friction plate 191 is connected with the internal thread shaft 9 through a thrust bearing 20 and a key, and the electromagnet 192 is fixedly connected with the shell 3.

The lead screw 17 is engaged with the housing 3 through a square guide rail to prevent rotation relative to the housing 3.

The working principle of the invention is as follows:

(1) the invention adopts a disc type alternating current servo motor with a middle stator structure to drive a ball screw to realize the specific principle of straight stroke electric execution as follows:

by electrifying the winding of the disc type motor stator 18, the winding of the disc type motor stator 18 is electrified to enable the disc type motor first rotor 15 and the disc type motor second rotor 16 to synchronously rotate, so that the internal thread shaft 9 is driven to synchronously rotate. The internal thread shaft 9 and the lead screw 17 are in thread transmission fit and are not self-locked, the lead screw 17 is matched with the shell 3 through a square guide rail, and the internal thread shaft 9 rotates to drive the lead screw 17 to move up and down so as to finish up and down actions. When the internal thread shaft 9 and the lead screw 17 move, the electromagnetic band-type brake mechanism 19 is powered off, and the friction plate 191 is separated from the electromagnet 192; when the disc type motor reaches a preset stroke to stop movement, the electromagnetic band-type brake mechanism 19 is electrified, the friction plate 191 is engaged with the electromagnet 192, the internal thread shaft 9 stops rotating together with the friction plate 191, and the screw 17 is braked.

(2) The specific principle of the electric and manual gear switching of the invention is as follows:

when the shifting fork 11 is in a lower position, the joint sleeve 10 is only connected with the internal thread shaft 9 through a spline, the internal thread shaft 9 rotates to drive the screw rod 17 to move up and down, and the gear is controlled by the motor at the moment; when the shift fork 11 is pulled up, the joint sleeve 10 is simultaneously connected with the internally threaded shaft 9 and the planet carrier 7 through the spline, thereby switching to the manual control mode. At the moment, the hand wheel 1 is rotated, the hand wheel 1 drives the sun gear 4 of the planetary gear set to rotate, after the speed is reduced by the planetary gear reducer, the rotation is output by the planet carrier 7, the internal thread shaft 9 is driven to rotate through the joint sleeve, the up-and-down action of the straight-stroke electric actuator is completed, and therefore labor-saving manual control is achieved.

(3) The specific principle of the invention for automatically powering off the motor when switching between manual operation is as follows:

when the shifting fork 11 is shifted upwards to realize manual control, the shifting fork 11 can rotate by an angle, and the angle sensor 12 arranged on the shifting fork 11 can send an electric signal. According to the signal that angle sensor sent, control system cuts off the power supply to motor and band-type brake mechanism to improve electric actuator's safety in utilization.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent flow transformations made by using the contents of the specification and the drawings, or applied directly or indirectly to other related systems, are included in the scope of the present invention.