CN103423238B - The oil cylinder displacement sensing apparatus of turbine hydraulic system - Google Patents
The oil cylinder displacement sensing apparatus of turbine hydraulic system Download PDFInfo
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- CN103423238B CN103423238B CN201310355546.4A CN201310355546A CN103423238B CN 103423238 B CN103423238 B CN 103423238B CN 201310355546 A CN201310355546 A CN 201310355546A CN 103423238 B CN103423238 B CN 103423238B
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- oil cylinder
- core bar
- displacement
- piston rod
- rack tube
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Abstract
An oil cylinder displacement sensing apparatus for turbine hydraulic system, relates to technical field of hydraulic equipment, and what solve is the technical problem improving oil cylinder safety in operation.This device comprises rack tube, core bar bearing, and a master reference, at least one secondary sensor; Described rack tube is fixed on oil cylinder front cover, and inner ring and the cylinder piston rod of described core bar bearing are coaxially affixed; The barrel of described rack tube is provided with radial through and is parallel to the lineal shape displacement guiding groove of cylinder piston rod telescopic direction; The movable core bar activity of described master reference is inserted in rack tube, and coaxially affixed with cylinder piston rod; The movable core bar of each secondary sensor is all positioned at rack tube outside, and the movable core bar telescopic shaft line of each secondary sensor is parallel with cylinder piston rod telescopic direction, and the outer ring of movable core bar respectively through connecting rod and core bar bearing of each secondary sensor is affixed.Device provided by the invention, is applicable to the oil cylinder displacement detecting of turbine hydraulic system.
Description
Technical field
The present invention relates to hydraulic equipment technology, particularly relate to a kind of technology of oil cylinder displacement sensing apparatus of turbine hydraulic system.
Background technique
In present turbine hydraulic system, the effect of valve oil cylinder is the aperture controlling steam valve, in order to control the steam flow size entering steam turbine, thus control the size of the generated energy of steam turbine, Bit andits control precision and the safety of valve oil cylinder are vital, therefore on the valve oil cylinder of turbine hydraulic system, oil cylinder displacement sensing apparatus are all housed.
The oil cylinder displacement sensing apparatus of existing turbine hydraulic system mainly contains two kinds:
1) the first oil cylinder displacement sensing apparatus fixes a rack tube on cylinder cover, the shell of displacement transducer is fixed on rack tube, core bar and the cylinder piston rod of displacement transducer are affixed, and during cylinder movement, the core bar 31 of displacement transducer does straight line motion with the flexible of cylinder piston rod;
2) the second oil cylinder displacement sensing apparatus as shown in Figure 3, cylinder cover 30 is fixed a rack tube 39, in the axle center of cylinder piston rod 38, axial mesopore is set, the reaction magnetic ring 32 of displacement transducer is fixed on the end face of cylinder piston rod 38, the core bar 31 of displacement transducer is fixed on rack tube 39, and through the mesopore inserting cylinder piston rod 38 axle center movable after reaction magnetic ring 32, during cylinder movement, the reaction magnetic ring 32 of displacement transducer does straight line motion with the flexible of cylinder piston rod, the core bar 31 of displacement transducer cuts reaction magnetic ring 32 excitation, the displacement signal producing oil cylinder exports to control system, by control system accordingly signal carry out the displacement of Precise Control of Oil cylinder.
Due in oil cylinder running, the piston rod of oil cylinder produces the rotation of circumferencial direction sometimes, the core bar of the displacement transducer therefore in the first oil cylinder displacement sensing apparatus is coaxial with cylinder piston rod, the core bar of the displacement transducer in the second oil cylinder displacement sensing apparatus is in the mesopore in movable insertion cylinder piston rod axle center, such core bar that the rotation of cylinder piston rod can be avoided to turn round bad displacement transducer, but this result also in and single displacement transducer can only be adopted to detect oil cylinder displacement on single oil cylinder, once displacement transducer breaks down, the security of operation of oil cylinder will be had influence on, and then affect the Security of turbine hydraulic system.
Summary of the invention
For the defect existed in above-mentioned prior art, technical problem to be solved by this invention is to provide a kind of oil cylinder displacement sensing apparatus that can improve the turbine hydraulic system of oil cylinder safety in operation.
In order to solve the problems of the technologies described above, the oil cylinder displacement sensing apparatus of a kind of turbine hydraulic system provided by the present invention, relates to the oil cylinder with piston rod, and this device comprises rack tube, displacement transducer; Described rack tube is fixed on oil cylinder front cover, and institute's displacement sensors is linear type displacement sensor; It is characterized in that: this device also comprises core bar bearing; The inner ring of described core bar bearing and the piston rod of oil cylinder coaxially affixed;
Institute's displacement sensors has multiple, and one of them displacement transducer is master reference, and another several displacement transducer is secondary sensor;
The barrel of described rack tube is provided with radial through lineal shape displacement guiding groove, and the quantity of described displacement guiding groove is consistent with the quantity of secondary sensor, and each displacement guiding groove is all parallel to the piston rod telescopic direction of oil cylinder;
The shell of each displacement transducer is all fixed on a mounting plate, and the relative position of described mounting plate and rack tube is fixed;
The movable core bar activity of described master reference is inserted in rack tube, and coaxially affixed with the piston rod of oil cylinder;
The movable core bar of each secondary sensor is all positioned at rack tube outside, and the movable core bar telescopic shaft line of each secondary sensor is parallel with the piston rod telescopic direction of oil cylinder, and the movable core bar of each secondary sensor is respectively fixed with a connecting rod;
The shaft of each connecting rod is affixed with the outer ring of core bar bearing after being each passed through each displacement guiding groove on rack tube barrel.
Further, described secondary sensor has one or two.
Further, the cylinder axle line of described rack tube is coaxial with the piston rod of oil cylinder.
Further, the outer ring of described core bar bearing is fixed with a plate, the outer ring of core bar bearing by this connecting plate and each connecting rod affixed.
The oil cylinder displacement sensing apparatus of turbine hydraulic system provided by the invention, adopt multisensor Redundancy Design, single oil cylinder adopt multiple displacement transducer to detect oil cylinder displacement, and the impact of piston rod Turning matched displacement sensor core bar is avoided by core bar bearing, the working life of displacement transducer can be ensured, improve the safety in operation of oil cylinder.
Accompanying drawing explanation
Fig. 1 is the structural representation of the oil cylinder displacement sensing apparatus of the turbine hydraulic system of first embodiment of the invention;
Fig. 2 is the structural representation of the oil cylinder displacement sensing apparatus of the turbine hydraulic system of second embodiment of the invention;
Fig. 3 is the structural representation of the oil cylinder displacement sensing apparatus of existing turbine hydraulic system.
Embodiment
Illustrate below in conjunction with accompanying drawing and be described in further detail embodiments of the invention, but the present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar change thereof, all should list protection scope of the present invention in.
As shown in Figure 1, the oil cylinder displacement sensing apparatus of a kind of turbine hydraulic system that first embodiment of the invention provides, relate to the oil cylinder 10 with piston rod, this device comprises rack tube 19, displacement transducer;
One end of described rack tube 19 is fixed on the front cover of oil cylinder 10, and the other end is fixed with a cover plate, and the cylinder axle line of rack tube 19 is coaxial with the piston rod of oil cylinder 10, and institute's displacement sensors is linear type displacement sensor;
It is characterized in that: this device also comprises core bar bearing;
The inner ring of described core bar bearing and the piston rod of oil cylinder 10 coaxially affixed, the outer ring of core bar bearing is fixed with a plate 17;
Institute's displacement sensors has two, and one of them displacement transducer is master reference 11, and another displacement transducer is secondary sensor 12;
The barrel of described rack tube 19 is provided with radial through lineal shape displacement guiding groove 18, and described displacement guiding groove 18 is parallel to the piston rod telescopic direction of oil cylinder 10;
The shell of each displacement transducer is all fixed on a mounting plate 16, and described mounting plate 16 is fixed with the relative position of rack tube 19;
Movable core bar 111 activity of described master reference 11 is inserted in rack tube 19, and coaxially affixed with the piston rod of oil cylinder 10;
The movable core bar 121 of described secondary sensor 12 is positioned at rack tube 19 outside, and the movable core bar telescopic shaft line of secondary sensor 12 is parallel with the piston rod telescopic direction of oil cylinder 10, and the movable core bar 121 of secondary sensor 12 is fixed with a connecting rod;
The shaft of described connecting rod through after the displacement guiding groove 18 on rack tube barrel and connecting plate 17 affixed.
As shown in Figure 2, the oil cylinder displacement sensing apparatus of a kind of turbine hydraulic system that second embodiment of the invention provides, relate to the oil cylinder 20 with piston rod, this device comprises rack tube 29, displacement transducer;
One end of described rack tube 29 is fixed on the front cover of oil cylinder 20, and the other end is fixed with a cover plate, and the cylinder axle line of rack tube 29 is coaxial with the piston rod of oil cylinder 20, and institute's displacement sensors is linear type displacement sensor;
It is characterized in that: this device also comprises core bar bearing;
The inner ring of described core bar bearing and the piston rod of oil cylinder 20 coaxially affixed, the outer ring of core bar bearing is fixed with a plate 27;
Institute's displacement sensors has three, and one of them displacement transducer is master reference 21, and another two displacement transducers are secondary sensor 22;
The barrel of described rack tube 29 is provided with radial through lineal shape displacement guiding groove 28, the quantity of described displacement guiding groove 28 is consistent with the quantity of secondary sensor 22, each displacement guiding groove 28 and each secondary sensor 22 one_to_one corresponding, and each displacement guiding groove 28 is all parallel to the piston rod telescopic direction of oil cylinder 20;
The shell of each displacement transducer is all fixed on a mounting plate 26, and described mounting plate 26 is fixed with the relative position of rack tube 29;
The movable core bar activity of described master reference 21 is inserted in rack tube 29, and coaxially affixed with the piston rod of oil cylinder 20;
The movable core bar of each secondary sensor 22 is all positioned at rack tube 29 outside, and the movable core bar telescopic shaft line of each secondary sensor 22 is parallel with the piston rod telescopic direction of oil cylinder 20, and the movable core bar of each secondary sensor 22 is respectively fixed with a connecting rod;
After the shaft of each connecting rod is each passed through each displacement guiding groove 28 on rack tube barrel and connecting plate 27 affixed.
Secondary number of sensors in first embodiment of the invention is one, secondary number of sensors in second embodiment of the invention is two, the quantity of the secondary sensor in other embodiment of the present invention can be also two or more, and the quantity of the displacement guiding groove corresponded also can be two or more.
The working principle of various embodiments of the present invention is as follows:
After oil cylinder brings into operation, the movable core bar of master reference does straight line motion with the flexible of piston rod of oil cylinder, core bar bearing, connecting plate also do straight line motion with the flexible of piston rod of oil cylinder simultaneously, connecting rod fixing on each secondary sensor activity core bar also thereupon along corresponding displacement guiding groove moving linearly, and then drives the movable core bar of each secondary sensor to do straight line motion with the flexible of piston rod of oil cylinder;
When the piston rod of oil cylinder produces the rotation of circumferencial direction, the movable core bar of master reference can rotate with piston rod, but still can do straight line motion with the flexible of piston rod, normal surveying work can not be affected, under the effect of core bar bearing, the connecting plate be fixed on core bar bearing outer ring can not rotate with piston rod, and the movable core bar of each secondary sensor also therefore can not by the impact of piston rod rotation, still can do straight line motion with the flexible of piston rod, normal surveying work can not be affected.
Claims (4)
1. an oil cylinder displacement sensing apparatus for turbine hydraulic system, relates to the oil cylinder with piston rod, and this device comprises rack tube, displacement transducer; Described rack tube is fixed on oil cylinder front cover, and institute's displacement sensors is linear type displacement sensor; It is characterized in that: this device also comprises core bar bearing; The inner ring of described core bar bearing and the piston rod of oil cylinder coaxially affixed;
Institute's displacement sensors has multiple, and one of them displacement transducer is master reference, and another several displacement transducer is secondary sensor;
The barrel of described rack tube is provided with radial through lineal shape displacement guiding groove, and the quantity of described displacement guiding groove is consistent with the quantity of secondary sensor, and each displacement guiding groove is all parallel to the piston rod telescopic direction of oil cylinder;
The shell of each displacement transducer is all fixed on a mounting plate, and the relative position of described mounting plate and rack tube is fixed;
The movable core bar activity of described master reference is inserted in rack tube, and coaxially affixed with the piston rod of oil cylinder;
The movable core bar of each secondary sensor is all positioned at rack tube outside, and the movable core bar telescopic shaft line of each secondary sensor is parallel with the piston rod telescopic direction of oil cylinder, and the movable core bar of each secondary sensor is respectively fixed with a connecting rod;
The shaft of each connecting rod is affixed with the outer ring of core bar bearing after being each passed through each displacement guiding groove on rack tube barrel.
2. the oil cylinder displacement sensing apparatus of turbine hydraulic system according to claim 1, is characterized in that: described secondary sensor has one or two.
3. the oil cylinder displacement sensing apparatus of turbine hydraulic system according to claim 1, is characterized in that: the cylinder axle line of described rack tube is coaxial with the piston rod of oil cylinder.
4. the oil cylinder displacement sensing apparatus of turbine hydraulic system according to claim 1, is characterized in that: the outer ring of described core bar bearing is fixed with a plate, the outer ring of core bar bearing by this connecting plate and each connecting rod affixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310355546.4A CN103423238B (en) | 2013-08-15 | 2013-08-15 | The oil cylinder displacement sensing apparatus of turbine hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310355546.4A CN103423238B (en) | 2013-08-15 | 2013-08-15 | The oil cylinder displacement sensing apparatus of turbine hydraulic system |
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| Publication Number | Publication Date |
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| CN103423238A CN103423238A (en) | 2013-12-04 |
| CN103423238B true CN103423238B (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310355546.4A Expired - Fee Related CN103423238B (en) | 2013-08-15 | 2013-08-15 | The oil cylinder displacement sensing apparatus of turbine hydraulic system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113740039B (en) * | 2020-05-14 | 2024-05-10 | 北京机械设备研究所 | Linear displacement testing device and method for piston rod type multi-degree-of-freedom actuating mechanism |
| CN117288078B (en) * | 2023-11-27 | 2024-02-13 | 天津德科智控股份有限公司 | Method for reducing lateral movement interference of displacement sensor and displacement sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201078369Y (en) * | 2007-06-28 | 2008-06-25 | 上海梅山钢铁股份有限公司 | Position detection apparatus for external type hydraulic cylinder |
| CN202579457U (en) * | 2012-03-09 | 2012-12-05 | 湖南睿创宇航科技有限公司 | Dynamic test cylinder with external sensors |
| CN202869427U (en) * | 2012-10-18 | 2013-04-10 | 鞍山维盛自动化科技有限公司 | Position detection system with auxiliary cylinder |
| CN203420968U (en) * | 2013-08-15 | 2014-02-05 | 上海汇益控制***股份有限公司 | Oil cylinder displacement sensing device of turbine hydraulic system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2872970B2 (en) * | 1996-06-05 | 1999-03-24 | 住友建機株式会社 | Crane cylinder stroke detector |
| JP3767647B2 (en) * | 1997-04-18 | 2006-04-19 | Ｎｏｋ株式会社 | Slide cylinder |
| JP2001263309A (en) * | 2000-03-21 | 2001-09-26 | Ckd Corp | Fluid pressure cylinder with positioner |
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2013
- 2013-08-15 CN CN201310355546.4A patent/CN103423238B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201078369Y (en) * | 2007-06-28 | 2008-06-25 | 上海梅山钢铁股份有限公司 | Position detection apparatus for external type hydraulic cylinder |
| CN202579457U (en) * | 2012-03-09 | 2012-12-05 | 湖南睿创宇航科技有限公司 | Dynamic test cylinder with external sensors |
| CN202869427U (en) * | 2012-10-18 | 2013-04-10 | 鞍山维盛自动化科技有限公司 | Position detection system with auxiliary cylinder |
| CN203420968U (en) * | 2013-08-15 | 2014-02-05 | 上海汇益控制***股份有限公司 | Oil cylinder displacement sensing device of turbine hydraulic system |
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| CN103423238A (en) | 2013-12-04 |
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