CN110821920B - Method for converting linear displacement of TRT hydraulic bypass valve into angular displacement - Google Patents
Method for converting linear displacement of TRT hydraulic bypass valve into angular displacement Download PDFInfo
- Publication number
- CN110821920B CN110821920B CN201910736012.3A CN201910736012A CN110821920B CN 110821920 B CN110821920 B CN 110821920B CN 201910736012 A CN201910736012 A CN 201910736012A CN 110821920 B CN110821920 B CN 110821920B
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- valve
- hydraulic cylinder
- distance
- linear displacement
- shaft
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004364 calculation method Methods 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/021—Valves for interconnecting the fluid chambers of an actuator
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Control Of Presses (AREA)
- Control Of Position Or Direction (AREA)
Abstract
A method of converting linear displacement of a TRT hydraulic bypass valve into angular displacement, setting: distance L between crank connection point of hydraulic cylinder fixed shaft and valve full closing position 1 The distance H between the valve shaft lever and the hydraulic cylinder fixing shaft, the crank length R and the angle alpha formed by the distance H between the valve shaft lever and the hydraulic cylinder fixing shaft and the crank length R when the hydraulic cylinder fixing shaft is at the full-closing position of the valve utilize the formula: l (L) 2 =L 1 +L，L 2 2 =R 2 +H 2 -2Rhcos (alpha+beta) calculation. The displacement signal of the position sensor is converted into an angular displacement signal, so that the indication value is consistent with the actual angle of the valve.
Description
Technical Field
The invention relates to the technical field of metallurgical equipment, in particular to a method for converting linear displacement of a TRT hydraulic bypass valve into angular displacement.
Background
At present, valve position detection of the TRT hydraulic bypass valve is realized by installing a linear displacement sensor on a hydraulic cylinder of an actuating mechanism, and the valve position is displayed after being converted into percentage by PLC calculation, and the calculation method is as follows:
the valve position is not accurately calculated by the method, and the opening percentage of the valve cannot be truly displayed.
Disclosure of Invention
The invention aims to provide a method for converting linear displacement of a TRT hydraulic bypass valve into angular displacement by converting a displacement signal of a position sensor into an angular displacement signal so that an indication value is consistent with an actual angle of the valve.
The solution of the invention is as follows:
a method of converting linear displacement of a TRT hydraulic bypass valve into angular displacement, comprising the steps of:
(1) A constant setting step: according to the working points of the fixed shaft of the hydraulic cylinder of the TRT hydraulic bypass valve and the rotation of the valve, setting: distance L between crank connection point of hydraulic cylinder fixed shaft and valve full closing position 1 The distance H between the valve shaft lever and the hydraulic cylinder fixing shaft, the crank length R and the angle alpha formed by the distance H between the valve shaft lever and the hydraulic cylinder fixing shaft and the crank length R when the hydraulic cylinder fixing shaft is at the full closing position of the valve;
(2) Conversion step of linear displacement and angular displacement: distance L between fixed shaft of hydraulic cylinder and crank connection point of valve when valve is operated at a certain position 2 The following formula is adopted for calculation:
L 2 =L 1 +L
in the above formula, L is the indication value of the linear displacement sensor when the valve operates at the position;
according to the triangle cosine law:
L 2 2 =R 2 +H 2 -2RHcos(α+β)
the method comprises the following steps of calculating to obtain:
i.e. converting the linear displacement indication L into an angular displacement β.
The invention has the advantage that the displacement signal of the position sensor is converted into an angular displacement signal, so that the valve position indication value is consistent with the actual angle of the valve.
Drawings
Fig. 1 is a schematic diagram of a TRT hydraulic bypass valve according to the present invention for controlling the valve.
FIG. 2 is a schematic diagram of a valve position switching method of the TRT hydraulic bypass valve of the present invention.
FIG. 3 is a schematic diagram of the present invention for linear displacement valve position conversion for a TRT hydraulic bypass valve.
Fig. 4 is a schematic diagram of the TRT hydraulic bypass valve structure.
The detail of the components of the drawings is as follows: the linear displacement sensor 1, the hydraulic cylinder 2, the hydraulic cylinder fixing shaft 3, the valve shaft lever 5, the valve full-open position 6, the running track 7, the valve full-closed position 8, the valve 9 and the hydraulic driving device 10.
Detailed Description
In the embodiment, when the valve is operated at a certain position, the indication value L of the matched linear displacement sensor is converted into an angular displacement indication value, so that the indication value of the linear displacement sensor can be used for actually feeding back the position of the valve.
The detailed structure of the invention is shown in figure 1, and comprises a linear displacement sensor 1, a hydraulic cylinder 2, a hydraulic cylinder fixing shaft 3, a valve shaft lever 5, a servo controller and a PLC controller, wherein when the valve rotates to a valve full-closing position 8, the valve is in a closed state, and when the valve rotates to a valve full-opening position 6, the valve is in a full-opening state, and the valve operates to form a running track 7.
As shown in FIG. 2, the dimensions of the valve position are indicated by the reference numeral, where L 1 、H、R、αFor a set constant, L1 is the distance between the crank connection point of the hydraulic cylinder fixing shaft and the valve in the fully closed position, H is the distance between the valve shaft lever and the hydraulic cylinder fixing shaft, R is the crank length, L2 is the distance between the hydraulic cylinder fixing shaft and the valve crank connection point when the valve operates in a certain position, and alpha is the angle formed by the distance H between the valve shaft lever and the hydraulic cylinder fixing shaft and the crank length R when the hydraulic cylinder fixing shaft and the valve in the fully closed position. Assuming that the linear displacement sensor shows a value of L, there are:
L 2 =L 1 +L
according to the triangle cosine law:
L 2 2 =R 2 +H 2 -2RHcos(α+β)
the method comprises the following steps of calculating to obtain:
the linear displacement sensor is converted into an angle signal.
As shown in fig. 3, the control method for converting linear displacement of the TRT hydraulic bypass valve into angular displacement according to the present invention comprises the steps of:
(1) The 4-20mA feedback signal of the linear displacement sensor is changed into the PLC from being connected into the servo controller.
(2) The linear displacement is converted into the angular displacement by editing a calculation formula in the PLC, and then an angular displacement signal is accessed into the servo controller.
The calculation method for converting the linear displacement into the angular displacement comprises the following steps:
L 2 =L 1 +L
according to the triangle cosine law:
L 2 2 =R 2 +H 2 -2RHcos(α+β)
the method comprises the following steps of calculating to obtain:
wherein L is 1 H, R, α are constants, L1 is the distance of the crank connection point when the hydraulic cylinder fixed shaft is in the fully closed position with the valve, H is the distance between the valve shaft and the hydraulic cylinder fixed shaft, R is the crank length, L2 is the distance of the hydraulic cylinder fixed shaft and the valve crank connection point when the valve is operated in a certain position, and L is the indication value of the linear displacement sensor in a certain position.
Claims (1)
1. A method of converting linear displacement of a TRT hydraulic bypass valve to angular displacement, comprising: the method comprises the following steps:
a constant setting step: according to the working points of the fixed shaft of the hydraulic cylinder of the TRT hydraulic bypass valve and the rotation of the valve, setting: distance L between crank connection point of hydraulic cylinder fixed shaft and valve full closing position 1 The distance H between the valve shaft lever and the hydraulic cylinder fixing shaft, the crank length R and the angle alpha formed by the distance H between the valve shaft lever and the hydraulic cylinder fixing shaft and the crank length R when the hydraulic cylinder fixing shaft is at the full closing position of the valve;
conversion step of linear displacement and angular displacement: distance L between fixed shaft of hydraulic cylinder and crank connection point of valve when valve is operated at a certain position 2 The following formula is adopted for calculation:
L 2 =L 1 +L
in the above formula, L is the indication value of the linear displacement sensor when the valve operates at the position;
according to the triangle cosine law:
L 2 2 =R 2 +H 2 -2RHcos(α+β)
the method comprises the following steps of calculating to obtain:
i.e. converting the linear displacement indication L into an angular displacement β.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736012.3A CN110821920B (en) | 2019-08-09 | 2019-08-09 | Method for converting linear displacement of TRT hydraulic bypass valve into angular displacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736012.3A CN110821920B (en) | 2019-08-09 | 2019-08-09 | Method for converting linear displacement of TRT hydraulic bypass valve into angular displacement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110821920A CN110821920A (en) | 2020-02-21 |
| CN110821920B true CN110821920B (en) | 2023-11-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910736012.3A Active CN110821920B (en) | 2019-08-09 | 2019-08-09 | Method for converting linear displacement of TRT hydraulic bypass valve into angular displacement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110821920B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08326950A (en) * | 1995-05-26 | 1996-12-10 | Mitsubishi Heavy Ind Ltd | Valve open/close condition detecting device |
| CN101726725A (en) * | 2008-10-29 | 2010-06-09 | 中国科学院自动化研究所 | Wireless sensor network node positioning method based on global optimization strategy |
| CN102581702A (en) * | 2012-01-09 | 2012-07-18 | 天津大学 | Method for positioning hole center |
| CN102699304A (en) * | 2012-06-20 | 2012-10-03 | 新兴铸管股份有限公司 | Electrical control casting equipment and control method thereof |
| CN103727303A (en) * | 2012-10-14 | 2014-04-16 | 蔡明� | Hall type intelligent valve positioner |
| CN207741730U (en) * | 2018-01-03 | 2018-08-17 | 中车青岛四方机车车辆股份有限公司 | The measuring device of pivot angle between a kind of hitch and car body |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050178213A1 (en) * | 2004-02-13 | 2005-08-18 | Jason Skowronski | Device for determining finger rotation using a displacement sensor |
| IL227323A (en) * | 2013-07-04 | 2016-06-30 | Israel Radomsky | System for wirelessly monitoring and predicting failures of linear valves |
-
2019
- 2019-08-09 CN CN201910736012.3A patent/CN110821920B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08326950A (en) * | 1995-05-26 | 1996-12-10 | Mitsubishi Heavy Ind Ltd | Valve open/close condition detecting device |
| CN101726725A (en) * | 2008-10-29 | 2010-06-09 | 中国科学院自动化研究所 | Wireless sensor network node positioning method based on global optimization strategy |
| CN102581702A (en) * | 2012-01-09 | 2012-07-18 | 天津大学 | Method for positioning hole center |
| CN102699304A (en) * | 2012-06-20 | 2012-10-03 | 新兴铸管股份有限公司 | Electrical control casting equipment and control method thereof |
| CN103727303A (en) * | 2012-10-14 | 2014-04-16 | 蔡明� | Hall type intelligent valve positioner |
| CN207741730U (en) * | 2018-01-03 | 2018-08-17 | 中车青岛四方机车车辆股份有限公司 | The measuring device of pivot angle between a kind of hitch and car body |
Non-Patent Citations (1)
| Title |
|---|
| 滚筒式采煤机记忆截割的数学原理;刘春生;黑龙江科技学院学报;第20卷(2010年第02期);第85-90页 * |
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| CN110821920A (en) | 2020-02-21 |
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