KR101115359B1 - Control Actuator Null Position Meadurement Device and Method - Google Patents
Control Actuator Null Position Meadurement Device and Method Download PDFInfo
- Publication number
- KR101115359B1 KR101115359B1 KR1020100005396A KR20100005396A KR101115359B1 KR 101115359 B1 KR101115359 B1 KR 101115359B1 KR 1020100005396 A KR1020100005396 A KR 1020100005396A KR 20100005396 A KR20100005396 A KR 20100005396A KR 101115359 B1 KR101115359 B1 KR 101115359B1
- Authority
- KR
- South Korea
- Prior art keywords
- control actuator
- neutral point
- displacement
- sensor
- spool
- Prior art date
Links
Images
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Servomotors (AREA)
Abstract
The present invention is to measure the displacement of the spool (spool) of the power plant control actuator in real time to check the neutral position (null position) of the control actuator spool in real time, and to determine whether the neutral point maintenance of the control actuator neutral point measuring device and the measurement using the same It is about a method,
Mechanical servo cover (Cover) of a control actuator equipped with a displacement measuring sensor (LVDT), a connector rod (CR) for mechanically connecting the displacement measuring sensor and a tooth rod of the control actuator, and the displacement measuring The present invention relates to a control actuator neutral point measuring device having a signal processing unit electrically connected to a sensor and receiving a sensor signal, and a method for measuring a neutral point of a power plant control actuator using the same.
According to the present invention, the displacement measuring sensor (LVDT) is installed on a tooth rod connected to the spool of the control actuator to perform displacement measurement during operation and to maintain the neutral point of the spool in a cylinder stop state and a smooth operation state. Can be measured.
Description
The present invention relates to a neutral point measuring apparatus used for a power plant control actuator and a measuring method using the same.
In the present invention, the control actuator is a component for adjusting the blade angle of the power plant blower, as shown in FIG. 1, a double-acting
On the other hand, the causes of excessive return flow are as follows. The mechanical servo's spool movement of the control actuator is applied when the input current is applied to the actuator, and the electrical signal is converted to rotational movement. When the stroke is completed, the feedback rod coupled with the cylinder is interlocked with the gear assembly combined with the spur gear and the rack to return the spool to the mechanical neutral point. Gear assemblies consisting of racks and spur gears will cause oil port shut-off if the gear ratio is not adjusted correctly, resulting in increased return flow. In addition, an increase in backlash of a gear contact point at a certain position where mechanical friction and a rod are continuously generated when a control actuator is operated means generation of play, which is impossible to maintain a neutral point of a bushing spool assembly (BSA). When the flow rate is increased due to the return flow rate, and the clearance due to the damage of the gear fixing pin occurs, the internal spool, ie, the internal spool, This is indicated by an increase in the return flow rate.
In this regard, there is a problem in the related art that there is no device and method for checking the neutral position of the control actuator spool in real time and confirming whether the neutral point is maintained.
Therefore, the present invention has been invented to solve the above-mentioned conventional problems, by measuring the displacement of the spool of the control actuator in real time to check the null position of the control actuator spool in real time, and maintain the neutral point It is an object of the present invention to provide a control actuator neutral point measuring apparatus and method for confirming the presence or absence thereof.
In order to achieve the above object, the control actuator neutral point measuring apparatus according to the present invention, the mechanical servo cover (Cover) of the control actuator equipped with a displacement measuring sensor (LVDT), the displacement measuring sensor and the control actuator And a connector rod (CR) for mechanically connecting a tooth rod, and a signal processing unit electrically connected to the displacement measuring sensor to receive a sensor signal.
In addition, the control actuator neutral point measuring method according to the present invention, by using the control actuator neutral point measuring device, it is operated by installing a displacement measuring sensor (LVDT) on a tooth rod connected to the spool of the control actuator Medium displacement measurement and measuring the presence or absence of the neutral point of the spool in the cylinder stop state and characterized in that the smooth operating state.
The apparatus and method for measuring a control actuator neutral point according to the present invention can provide a device and a method for checking a null position of a control actuator spool in real time and checking whether a neutral point is maintained.
1 is a cutting configuration of a conventional power plant control actuator
2 is a plan view and a side cross-sectional view of the mechanical servo cover in FIG.
3 is a perspective view of an essential part of a control actuator neutral point measuring device according to an embodiment of the present invention;
4 is a plan view and a side cross-sectional view of the main part of FIG.
5 is a reference diagram showing a state in which the control actuator neutral point measuring device according to an embodiment of the present invention is mounted
6 is a flowchart illustrating a method for measuring a neutral point of a control actuator according to an embodiment of the present invention.
Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the control actuator neutral point measuring apparatus and method according to the present invention.
Figure 3 is a perspective view of the main part of the control actuator neutral point measuring apparatus according to an embodiment of the present invention. As shown in Figure 3, the control actuator neutral point measuring apparatus according to an embodiment of the present invention, the mechanical servo cover (Cover) of the control actuator equipped with a displacement measuring sensor (LVDT), the displacement measuring sensor and And a connector rod (CR) for mechanically connecting a tooth rod of a control actuator, and a signal processor (not shown) electrically connected to the displacement measuring sensor to receive a sensor signal. . In addition, it is characterized in that it further comprises a predetermined sensor mounting portion (M) for mounting the displacement measuring sensor to the mechanical servo cover.
For reference, FIG. 4 is a plan view and a side cross-sectional view of the main part in FIG. 3. As shown in FIG. 4, the predetermined sensor mounting part M according to an embodiment of the present invention may mount the displacement measuring sensor to the mechanical servo cover between the displacement measuring sensor and the mechanical servo cover. As a possible component, it is desirable to simultaneously serve as a guide of the connector rod CR connected to the tooth rod of the control actuator.
5 is a reference diagram showing a state in which the control actuator neutral point measuring apparatus according to an embodiment of the present invention is mounted. As shown in Figure 5, the control actuator neutral point measuring apparatus according to an embodiment of the present invention, it is possible to mount the displacement measuring sensor (LVDT) to the mechanical servo cover (Cover) of the control actuator, the displacement A connector rod (CR) for mechanically connecting the measurement sensor (LVDT) and the tooth rod of the control actuator is provided so that the movement displacement of the spool of the mechanical servo linked to the tooth rod can be known. And a signal processing unit electrically connected to the displacement measuring sensor LVDT to process signals of the displacement measuring sensor, to check in real time the null position of the control actuator spool, and to maintain the neutral point. Make sure to check.
6 is a flowchart illustrating a method for measuring a neutral point of a control actuator according to an exemplary embodiment of the present invention. As shown in Figure 6, Figure 4 is a control actuator neutral point measuring method according to an embodiment of the present invention, as a control actuator neutral point measuring method using the control actuator neutral point measuring device according to the present invention described so far ,
Hydraulic pressure supply step (S100) of the control actuator to the pressure port (Pressure Port), the displacement generating step of the spool and the tooth rod during the mechanical servo operation of the control actuator (S200), the displacement generating step of the connector rod connected to the tooth rod ( S300), the displacement of the connector rod is sensed by the displacement measuring sensor (S400), the signal processing unit receives a signal sensed by the displacement measuring sensor signal processing (S500), the real-time displacement state through the signal processing And determining the neutral point of the spool (S600), thereby installing a displacement measuring sensor (LVDT) on a tooth rod connected to the spool of the control actuator to perform displacement measurement during operation. It is characterized by measuring the existence of the neutral point of the spool and the smooth operation state in the cylinder stop state.
The configuration and operation as described above are not limited to the claims of the present invention as an embodiment, and various changes and modifications are possible within the scope of not changing the technical spirit of the present invention. It is obvious to those who are engaged.
10: double acting cylinder 20: mechanical servo
A: A Port B: B Port
C: Mechanical Servo Cover M: Sensor Mount
S: Spool LVDT: Displacement sensor
CR: Connector Rod
Claims (3)
Mechanical servo cover (Cover) of a control actuator equipped with a displacement measuring sensor (LVDT), a connector rod (CR) for mechanically connecting the displacement measuring sensor and a tooth rod of the control actuator, and the displacement measuring A control actuator neutral point measuring device, comprising a signal processor electrically connected to a sensor and receiving a sensor signal
The control actuator neutral point measuring device, characterized in that it further comprises a predetermined sensor mounting portion (M) for mounting the displacement measuring sensor to the mechanical servo cover.
Hydraulic pressure supply step (S100) to the pressure port of the control actuator (S100), the displacement generating step of the spool and the tooth rod during the mechanical servo operation of the control actuator (S200), the displacement generating step of the connector rod connected to the tooth rod ( S300), the displacement of the connector rod is sensed by the displacement measuring sensor (S400), the signal processing unit receives a signal sensed by the displacement measuring sensor signal processing (S500), the displacement state through the signal processing and Control actuator neutral point measuring method comprising the step of determining the neutral point of the spool (S600)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100005396A KR101115359B1 (en) | 2010-01-21 | 2010-01-21 | Control Actuator Null Position Meadurement Device and Method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100005396A KR101115359B1 (en) | 2010-01-21 | 2010-01-21 | Control Actuator Null Position Meadurement Device and Method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20110085545A KR20110085545A (en) | 2011-07-27 |
| KR101115359B1 true KR101115359B1 (en) | 2012-03-07 |
Family
ID=44922329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020100005396A KR101115359B1 (en) | 2010-01-21 | 2010-01-21 | Control Actuator Null Position Meadurement Device and Method |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101115359B1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004295747A (en) | 2003-03-28 | 2004-10-21 | Sumitomo Heavy Ind Ltd | Origin determining method of hydraulic actuator, and control program for the same |
| KR100600338B1 (en) | 2005-03-21 | 2006-07-18 | 주식회사 포스코 | Apparatus and method for maintaining a optimum alignment under a steam turbine generator drriving |
-
2010
- 2010-01-21 KR KR1020100005396A patent/KR101115359B1/en active IP Right Grant
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004295747A (en) | 2003-03-28 | 2004-10-21 | Sumitomo Heavy Ind Ltd | Origin determining method of hydraulic actuator, and control program for the same |
| KR100600338B1 (en) | 2005-03-21 | 2006-07-18 | 주식회사 포스코 | Apparatus and method for maintaining a optimum alignment under a steam turbine generator drriving |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20110085545A (en) | 2011-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6615114B1 (en) | Calibration system and method for work machines using electro hydraulic controls | |
| US8215227B2 (en) | Detecting of faults in a valve system and a fault tolerant control | |
| JP2012508857A (en) | Solenoid valve with sensor for determining the stroke, speed and / or acceleration of the moving core of the valve as an indication of failure mode and health | |
| CN112041560B (en) | Calibration system for variable displacement hydraulic pump | |
| US8521334B2 (en) | Method for diagnosing the state of wear of a valve arrangement for controlling the flow of a process medium | |
| EP3591270B1 (en) | System and method for detecting position of a valve driven by a solenoid linear actuator | |
| CN104838152A (en) | Online sensor calibration for electrohydraulic valves | |
| CA2341804A1 (en) | Auto-calibration of a solenoid operated valve | |
| CN101471596A (en) | Electrical actuator | |
| EP2450145A2 (en) | Linkage clamp | |
| US7320349B2 (en) | Tree harvester | |
| US20140259720A1 (en) | Controllable caliper | |
| BR112019011715A2 (en) | variable embedded precision managed pressure control system | |
| DE102010001928A1 (en) | Measuring system and interferometer | |
| KR101115359B1 (en) | Control Actuator Null Position Meadurement Device and Method | |
| IT202000011857A1 (en) | EQUIPMENT FOR ZEROING, CALIBRATION AND MEASUREMENT OF MEASURING INSTRUMENTS | |
| KR20180035357A (en) | Apparatus for confirming state of opening of valve using hall sensor | |
| CN102840972A (en) | Hydraulic loading device for mechanical part test table | |
| KR101255416B1 (en) | Method and device for indicating the position of hydraulically actuated armatures | |
| RU2527915C2 (en) | Device and method of positioning of machinery with variable geometry for turbomachinery using hydraulic cylinder with relative measurement | |
| JP6081232B2 (en) | Hydraulic device, hydraulic system, control method of hydraulic device, and control method of hydraulic system | |
| US20090145291A1 (en) | Method for detecting the drive type of an actuator (ii) | |
| KR101380915B1 (en) | Engine valve clearance measuring method and its apparatus | |
| CN201443542U (en) | Lever feedback type electro-hydraulic servomechanism | |
| JP6120234B2 (en) | Position display method and apparatus for hydraulic drive armature |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20150206 Year of fee payment: 4 |
|
| FPAY | Annual fee payment |
Payment date: 20160211 Year of fee payment: 5 |
|
| FPAY | Annual fee payment |
Payment date: 20170206 Year of fee payment: 6 |
|
| FPAY | Annual fee payment |
Payment date: 20180206 Year of fee payment: 7 |
|
| FPAY | Annual fee payment |
Payment date: 20190201 Year of fee payment: 8 |