CN110578825A - Flow adjusting method and adjusting valve based on ultrasonic motor server - Google Patents
Flow adjusting method and adjusting valve based on ultrasonic motor server Download PDFInfo
- Publication number
- CN110578825A CN110578825A CN201910942958.5A CN201910942958A CN110578825A CN 110578825 A CN110578825 A CN 110578825A CN 201910942958 A CN201910942958 A CN 201910942958A CN 110578825 A CN110578825 A CN 110578825A
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- Prior art keywords
- ultrasonic motor
- rotor
- valve
- stator
- flow
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses a microminiature flow regulating method and a regulating valve for regulating liquid medium flow based on an ultrasonic motor server. The ultrasonic motor utilizes the inverse piezoelectric characteristic of a piezoelectric material to excite the mechanical vibration of a motor stator, converts electric energy into mechanical energy to be output through the friction force between the stator and the rotor, drives the directional motion of the rotor, drives the flow adjusting rod of the flow valve (adjusts the flow area of a fluid medium) through the directional motion of the rotor, and completes the flow adjustment required by a task, and the adjusting valve consists of an ultrasonic motor, a servo control system (a driving power supply, a matching circuit, an ultrasonic driver (the output frequency is 20-100 KHz high-frequency voltage)) and a flow adjusting valve, and provides a valve body structure meeting high-precision flow adjustment in a certain range for the fluid medium control system.
Description
Technical Field
the invention relates to the technical field of flow regulating valves, in particular to a flow regulating method based on an ultrasonic motor server and a corresponding regulating valve structure.
background
The prior flow regulating valve mostly adopts a manual or stepping servo motor system to regulate and control the flow, the manual mode is simple, but the manual or stepping servo motor system is not easy to regulate the high-precision micro-flow of a flowing medium, can not realize automatic control, and is not suitable for dangerous working systems and places.
Disclosure of Invention
In order to achieve the above purpose, the present invention aims to provide a flow rate adjusting method and an adjusting valve based on an ultrasonic motor server, which can achieve the requirements of miniaturization and light weight of a system, have the advantages of small volume, simple structure, low speed, large torque, fast response speed, no influence of an electromagnetic field, high energy conversion efficiency, large holding torque, etc., have a wide flow rate adjusting range, can achieve the adjustment and control of high-precision microgram-level flow rate, and can be widely applied to space vehicles with extremely strict requirements on electromagnetic environment, volume and quality.
The technical scheme adopted by the invention is as follows:
An adjusting method of a flow regulating valve realizes the adjustment of the opening degree of a valve opening by driving a valve rod to move along the axial direction of the valve rod through an ultrasonic motor.
The ultrasonic motor rotor is provided with a threaded hole, and the axis of the threaded hole is coaxial with the rotation axis of the rotor.
furthermore, a friction plate is arranged on the outer side of the rotor of the ultrasonic motor, is in a circular ring shape and is coaxial with the rotation axis of the rotor.
The utility model provides an ultrasonic motor stator, ultrasonic motor stator is the ring form, is provided with the polylith electricity strain gauge along the circumference interval of stator, and electricity strain gauge is located the radial plane of stator. The radial plane is the plane defined by the axis of the circular stator and the diameter line of the circular ring at the end surface.
Furthermore, the ultrasonic motor stator also comprises a stator framework which is in a circular ring shape, a plurality of notches are formed in one end face of the stator framework, the notches are located in the radial direction of the end face of the stator framework, and the electrostriction foil is arranged in the notches.
A flow regulating valve comprises a flow regulating valve body,
An ultrasonic motor stator that generates mechanical vibration through an electro-strain gauge;
The ultrasonic motor rotor is driven by the mechanical vibration of the ultrasonic motor stator to rotate directionally;
The valve rod is used for controlling the opening degree of the valve opening, the valve rod is connected with the ultrasonic motor rotor through threads, and the moving direction of the valve rod is located in the axial direction of the ultrasonic rotor.
furthermore, the one end of valve rod is a cone, and the other end of valve rod passes through the connecting pin and can dismantle with the screw rod and be connected, screw rod and ultrasonic motor rotor threaded connection.
Further, the screw thread of the screw rod is a trapezoidal thread.
Furthermore, the flow regulating valve also comprises a valve body,
the ultrasonic motor comprises a shell, wherein a thrust bearing is arranged in the shell, and an ultrasonic motor rotor and an ultrasonic motor stator are sequentially arranged between the thrust bearing and the shell;
and the spring is sleeved on the outer surface of the valve rod and is used for providing axial pressing force of the threaded connection between the valve rod and the rotor of the ultrasonic motor.
Further, the flow regulating valve also comprises a driving power supply, a driving circuit and an ultrasonic driver, and the frequency of the output voltage of the ultrasonic driver is 20-100 KHz.
the working principle of the flow regulating valve is as follows:
The first step is as follows:
The valve rod of the flow regulating valve is kept in a normally open state or a normally closed state under the action of spring force and self-locking force of the trapezoidal thread pair, after the system receives a regulating instruction, the servo system controls the output frequency, phase sequence and time length of high-frequency voltage of the ultrasonic driver according to the flow regulating instruction, the combination of the electric induced strain gages on the stator in the ultrasonic motor is excited to generate mechanical vibration (traveling wave and standing wave), and the rotor of the ultrasonic motor is driven to complete directional rotary motion required by a task through friction force between the stator and the rotor.
the second step is that:
along with the directional rotary motion of the rotor of the ultrasonic motor, the flow regulating valve rod connected with the rotor is driven to complete axial linear reciprocating motion, so that the opening degree of the valve opening is regulated, and the flow is regulated.
The third step:
After the rated flow adjustment is completed, the servo system stops the output of the excitation voltage of the driver to the ultrasonic motor, the ultrasonic motor stator and the ultrasonic motor rotor do not generate relative motion due to a friction pair between the ultrasonic motor stator and the ultrasonic motor rotor, the ultrasonic motor rotor is kept in position after the directional rotation motion is completed, meanwhile, the valve rod does not generate relative motion by utilizing the self-locking function of a trapezoidal thread pair between the screw rod and the ultrasonic motor rotor, the change of the flow area of a fluid medium is ensured, and the flow size after the adjustment is kept.
at present, the flow regulating valve in the industry is realized by adopting a stepping servo motor. The defects of large volume, low adjusting precision, heavy structure mass, high maintenance cost and the like exist; the flow regulating valve based on the ultrasonic motor servo has the advantages of compact structure, and great advantages in the aspects of volume miniaturization, weight and light weight, flow regulating range and high-precision micro-flow regulation (microgram magnitude).
drawings
FIG. 1 is a schematic structural diagram of a flow control valve based on an ultrasonic motor servo (liquid inlet is parallel to liquid outlet);
FIG. 2 is a schematic diagram of a flow control valve based on an ultrasonic motor servo (liquid inlet is perpendicular to liquid outlet);
FIG. 3 is a schematic diagram of the operation of a servo flow control valve based on an ultrasonic motor;
FIG. 4 is a schematic view of an ultrasonic motor configuration;
FIG. 5 is a schematic view of an ultrasonic motor stator structure;
FIG. 5-1 is a schematic sectional view taken along line A-A in FIG. 5;
FIG. 6 is a schematic view of an ultrasonic motor rotor configuration;
FIG. 6-1 is a cross-sectional view of FIG. 6;
FIG. 7 is a schematic view of a flow control valve (liquid inlet and liquid outlet parallel);
Fig. 8 is a schematic view of the flow control valve (liquid inlet is perpendicular to liquid outlet).
Detailed Description
the present invention will be further described with reference to the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments, and various modifications, substitutions and alterations made based on the common technical knowledge and conventional means in the art without departing from the technical idea of the present invention are included in the scope of the present invention.
as shown in fig. 1 to 3, a flow control valve structure based on an ultrasonic motor server adopts a form that an ultrasonic motor drives a valve rod 2 to regulate flow, and comprises a servo system (a driving power supply, a matching circuit, an ultrasonic driver (a high-frequency voltage with an output frequency of 20 to 100 KHz)) and an ultrasonic motor stator 7, an ultrasonic motor rotor 6, a flow control valve body 1 and the valve rod 2; the ultrasonic motor driving structure is arranged outside the valve body 1 of the flow regulating valve, and the screw 5 is connected with the valve rod 2 through the connecting pin 4, so that the independence between the valve body of the structural flow valve and the driving motor and the compactness of the whole structure are realized; the valve rod 2 is driven by the ultrasonic motor, and due to the fact that the frequency and the duration of exciting voltage of an ultrasonic driver (the output frequency is high-frequency voltage of 20-100 KHz), micro-feed motion (smaller than 0.1 micrometer) can be achieved, and therefore the valve rod 2 is driven to achieve high-precision micro-flow regulation (microgram magnitude) of medium flow. The servo system stops the output of the driver to the excitation voltage of the ultrasonic motor, the ultrasonic motor stator 7 and the ultrasonic motor rotor 6 do not move relatively due to the friction pair between the two, the ultrasonic motor rotor 6 keeps the position after finishing the directional movement, and meanwhile, the valve rod 2 does not move relatively by utilizing the self-locking function of the trapezoidal thread pair between the screw rod 5 and the ultrasonic motor rotor 6, the change of the medium flow area is ensured, and the regulated medium flow is kept.
In this embodiment, the flow rate adjusting valve mainly includes a servo system (a driving power supply, a matching circuit, an ultrasonic driver (a high-frequency voltage with an output frequency of 20 to 100 KHz)), an ultrasonic motor stator 7, an ultrasonic motor rotor 6, a flow rate adjusting valve body 1, a valve rod 2, and the like (see fig. 1 and 2). The ultrasonic motor (including stator and rotor) is installed outside the valve body of the regulating valve, the rotor 6 of the ultrasonic motor is coaxially connected with the screw 5 and the valve rod 2, when the system starts to work, the electric strain gauge 71 on the stator generates mechanical vibration to drive the directional motion of the rotor 6 of the ultrasonic motor, the circular directional motion of the rotor 6 of the ultrasonic motor is converted into the linear reciprocating motion of the screw 5 through the trapezoidal thread pair to drive the valve rod 2 connected with the screw 5, the control of the medium flow area is realized, the control of the medium flow in a wide range is realized, and the working principle diagram of the system is shown in fig. 3.
As for the ultrasonic motor structure, as shown in fig. 4:
the ultrasonic motor provides adjusting driving torque of the flow adjusting valve and mainly comprises a shell 13, an ultrasonic motor stator 7, an ultrasonic motor rotor 6, a thrust bearing 8, a screw rod 5, a power supply swing line 16, a flange sealing cover plate 17 and the like. The structure of the device is schematically shown in figure 4. The ultrasonic motor receives a driving high-frequency electric signal transmitted by the ultrasonic driver, an electric strain gauge combination on the ultrasonic motor stator 7 converts electric energy into mechanical vibration of the strain gauge 71 according to the electric signal, a friction pair is arranged between the electric strain gauge 71 combination and the ultrasonic motor rotor 6, and when the electric strain gauge 71 of the ultrasonic motor stator 7 vibrates mechanically, the ultrasonic motor rotor 6 is driven to complete directional movement required by a task through friction force between the ultrasonic motor stator 7 and the ultrasonic motor rotor 6.
As for the structure of the ultrasonic motor stator 7, as shown in fig. 5 and 5-1:
the ultrasonic motor stator 7 is used for fixing the electrostriction film 71, and the electrostriction film 74 forms an electrostriction film array according to a certain arrangement and combination rule. The ultrasonic motor stator 7 mainly comprises a stator framework 74, an electrostriction sheet 71, an electrostriction sheet array connection power line 73, sealing and fixing potting adhesive 72 and the like, and the structural schematic diagram of the ultrasonic motor stator is shown in fig. 5.
As for the structure of the ultrasonic motor rotor 6, as shown in fig. 6 and 6-1:
The ultrasonic motor rotor 6 is mainly composed of a rotor body 61 and a friction plate 62, the friction plate 62 is fixed on an annular bulge on the outer circumferential surface of the rotor body 61, and the structural schematic diagram of the ultrasonic motor rotor 6 is shown in fig. 6 and 6-1. The rotary mechanism has the characteristics of high rotation precision and long service life.
As for the structure of the flow rate adjustment valve, as shown in fig. 7 and 8:
The flow regulating valve is used for regulating the medium flow and simultaneously provides a connecting interface for a pipeline system. The structure is schematically shown in fig. 7 and 8.
The flow regulating valve of the invention comprises two forms, one is a structure that a liquid inlet is parallel to a liquid outlet as shown in figure 1, and the other is a structure that a liquid inlet is vertical to a liquid outlet as shown in figure 2.
In fig. 1, the flow control valve includes a flow control valve body 1, a valve rod 2, a spring 3, a connecting pin 4, a screw 5 (trapezoidal thread), an ultrasonic motor rotor 6, an ultrasonic motor stator 7, a thrust bearing 8, a seal ring 9, a housing 13, a connecting flange 14, a seal seat 15, and a servo system.
In fig. 2, the flow control valve includes a flow control valve body 1, a valve rod 2, a spring 3, a connecting pin 4, a screw 5 (trapezoidal thread), an ultrasonic motor rotor 6, an ultrasonic motor stator 7, a thrust bearing 8, a seal ring 9, a flexible seal gasket 10, a guide press block 11, a connecting screw nut 12, and a servo system.
the main parameters of the two regulating valves are as follows: 0 g/s-30 g/s of flow regulating valve and driving power supplythe matching circuit is self-made, and the ultrasonic driver outputs adjustable high-frequency voltage with the frequency of 20-100 KHz. The main metal material of the regulating valve is light high-strength aluminum alloy, the quality of the flow regulating valve of the ultrasonic motor is controlled to be below 0.15kg, and the total size isThe flow range of 0 g/s-30 g/s is provided for system adjustment, the adjustment precision is +/-0.001 g, and the response time is not more than 30 ms. The effectiveness and feasibility of the invention was verified by various tests on the entire generator.
Claims (10)
1. A method of adjusting a flow regulator valve, comprising: the valve rod is driven by the ultrasonic motor to move along the axial direction of the valve rod, so that the opening degree of the valve opening is adjusted.
2. An ultrasonic motor rotor characterized by: the rotor of the ultrasonic motor is provided with a threaded hole, and the axis of the threaded hole is coaxial with the rotation axis of the rotor.
3. An ultrasonic motor rotor as set forth in claim 2 wherein: and a friction plate is arranged on the outer side of the rotor of the ultrasonic motor, is in a circular ring shape and is coaxial with the rotation axis of the rotor.
4. An ultrasonic motor stator characterized by: the ultrasonic motor stator is annular, a plurality of electrostriction foils are arranged at intervals along the circumferential direction of the stator, and the electrostriction foils are positioned in the radial plane of the stator.
5. an ultrasonic motor stator according to claim 4, wherein: the ultrasonic motor stator further comprises a stator framework, the stator framework is in a circular ring shape, a plurality of notches are formed in one end face of the stator framework, the notches are located in the radial direction of the end face of the stator framework, and an electro-strain sheet is arranged in each notch.
6. A flow control valve characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
an ultrasonic motor stator that generates mechanical vibration through an electro-strain gauge;
The ultrasonic motor rotor is driven by the mechanical vibration of the ultrasonic motor stator to rotate directionally;
the valve rod is used for controlling the opening degree of the valve opening, the valve rod is connected with the ultrasonic motor rotor through threads, and the moving direction of the valve rod is located in the axial direction of the ultrasonic rotor.
7. a flow regulating valve as claimed in claim 6, wherein: one end of the valve rod is a cone, the other end of the valve rod is detachably connected with the screw rod through a connecting pin, and the screw rod is in threaded connection with the rotor of the ultrasonic motor.
8. a flow regulating valve as claimed in claim 7, wherein: the screw thread of the screw rod is a trapezoidal thread.
9. A flow regulating valve as claimed in claim 6, wherein: also comprises the following steps of (1) preparing,
The ultrasonic motor comprises a shell, wherein a thrust bearing is arranged in the shell, and an ultrasonic motor rotor and an ultrasonic motor stator are sequentially arranged between the thrust bearing and the shell;
And the spring is sleeved on the outer surface of the valve rod and is used for providing axial pressing force of the threaded connection between the valve rod and the rotor of the ultrasonic motor.
10. A flow regulating valve as claimed in claim 6, wherein: the ultrasonic motor driving device further comprises a driving power supply, a driving circuit and an ultrasonic driver, wherein the frequency of the output voltage of the ultrasonic driver is 20-100 KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942958.5A CN110578825A (en) | 2019-09-30 | 2019-09-30 | Flow adjusting method and adjusting valve based on ultrasonic motor server |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942958.5A CN110578825A (en) | 2019-09-30 | 2019-09-30 | Flow adjusting method and adjusting valve based on ultrasonic motor server |
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| CN110578825A true CN110578825A (en) | 2019-12-17 |
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| CN201910942958.5A Pending CN110578825A (en) | 2019-09-30 | 2019-09-30 | Flow adjusting method and adjusting valve based on ultrasonic motor server |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350875A (en) * | 2020-03-19 | 2020-06-30 | 大连理工大学 | Micro-flow proportional control valve |
| CN112324945A (en) * | 2020-11-26 | 2021-02-05 | 金陵科技学院 | High-pressure flow electro-hydraulic servo valve based on ultrasonic motor control and control method |
| CN113309889A (en) * | 2021-06-04 | 2021-08-27 | 金陵科技学院 | Overflow valve for accurately controlling liquid pressure based on ultrasonic motor and control method |
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| US5411241A (en) * | 1989-01-11 | 1995-05-02 | Oras Oy | Control valve for a faucet and use of ultrasonic motor |
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| JPH08338561A (en) * | 1995-06-09 | 1996-12-24 | Tokyo Gas Co Ltd | Actuator using ultrasonic motor |
| CN1239538A (en) * | 1996-10-03 | 1999-12-22 | 丰田自动车株式会社 | Braking system including motor-driven disc brake equipped with self-servo mechanism |
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| CN201966829U (en) * | 2011-04-06 | 2011-09-07 | 郑州大学 | Rotating anti-explosion ultrasonic motor |
| CN103672106A (en) * | 2013-12-31 | 2014-03-26 | 苏州市职业大学 | Electric actuating mechanism |
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| JPH01203638A (en) * | 1988-02-09 | 1989-08-16 | Kiyousan Denki Kk | Idling speed control device for engine |
| US5411241A (en) * | 1989-01-11 | 1995-05-02 | Oras Oy | Control valve for a faucet and use of ultrasonic motor |
| CN2116992U (en) * | 1992-04-03 | 1992-09-23 | 沈阳冶金机械专科学校 | Ultrasonic wave motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111350875A (en) * | 2020-03-19 | 2020-06-30 | 大连理工大学 | Micro-flow proportional control valve |
| CN112324945A (en) * | 2020-11-26 | 2021-02-05 | 金陵科技学院 | High-pressure flow electro-hydraulic servo valve based on ultrasonic motor control and control method |
| CN113309889A (en) * | 2021-06-04 | 2021-08-27 | 金陵科技学院 | Overflow valve for accurately controlling liquid pressure based on ultrasonic motor and control method |
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Application publication date: 20191217 |