CN102588387A - External dynamic test cylinder of sensor - Google Patents
External dynamic test cylinder of sensor Download PDFInfo
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- CN102588387A CN102588387A CN2012100606243A CN201210060624A CN102588387A CN 102588387 A CN102588387 A CN 102588387A CN 2012100606243 A CN2012100606243 A CN 2012100606243A CN 201210060624 A CN201210060624 A CN 201210060624A CN 102588387 A CN102588387 A CN 102588387A
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Abstract
The invention discloses an external dynamic test cylinder of a sensor, comprising a speed sensor (3), a piston (8) and a displacement sensor, the external dynamic test cylinder is characterized in that an integral structure is mainly composed of three parts: a dynamic cylinder, the speed sensor (3) and the displacement sensor (11). The external dynamic test cylinder of the sensor, provided by the invention, is easily manufactured, convenient for installing, debugging and maintaining, medium in test precision, and good in practicality, meets the frequency characteristic test requirement of an electro-hydraulic servo valve commonly used in the industry, and is particularly suitable for a test device and an experimental table for training and teaching.
Description
Technical field
The present invention relates to sensor experiment device field, relate in particular to a kind of sensor built-out type dynamic test cylinder.
Background technique
Frequency characteristic test is the important content of electrohydraulic servo valve dynamic performance test, and the dynamic test cylinder is the indispensable device of electrohydraulic control frequency characteristic test.Conventional dynamic test cylinder is built-in with velocity transducer and the flux signal of displacement transducer acquisition quilt examination valve and the position signal of hydraulic piston that specialized designs is made, shown in accompanying drawing 3.Because manufacture difficulty is big, professional very strong, the maintenance difficulty costs an arm and a leg, and is that professional production enterprise is exclusive always.Along with the increasingly extensive application of hydraulic servo technology, general to the increasing demand of hydraulic efficiency servo-valve frequency characteristic test,
Particularly needs in this respect such as the technical training department of institution of higher learning, vocational technical universities and colleges, secondary technical school and relevant enterprise are very urgent.Develop novel, be easy to make, dynamic test cylinder that electrohydraulic control frequency characteristic test device easy to maintenance is used, to satisfy market demand, most important for hydraulic test device and teaching experimental base that research and development are new.
Summary of the invention
The purpose of this invention is to provide a kind of being easy to makes; Installation and Debugging are easy to maintenance, and testing precision is medium, and practicability is good; Satisfy industry electrohydraulic control frequency characteristic test requirement commonly used, and be specially adapted to train and impart knowledge to students with the sensor built-out type dynamic test cylinder of testing apparatus and Laboratory Furniture.
For realizing above purpose, the technological scheme that the present invention adopts: a kind of sensor built-out type dynamic test cylinder, it comprises velocity transducer (3), piston (8), displacement transducer (11); It is characterized in that: this device overall structure mainly is made up of three parts: dynamic cylinder, velocity transducer (3) and displacement transducer (11);
Described dynamic cylinder is made up of piston (8), cylinder body (9) and cylinder body (9) end covers at two sides (6);
Described velocity transducer (3) can be assemblied on the velocity transducer lower end cap (1) freely; Velocity transducer upper end cap (2) is connected through screw with velocity transducer lower end cap (1); The moving bar of velocity transducer (3) is connected through the connecting screw rod of installing on the guide rod that connects folder (4) and piston (8) (5), and velocity transducer (3) is fixed on a side of dynamic cylinder;
Described displacement transducer (11) is assemblied on the displacement transducer lower end cap (10) freely; Displacement transducer upper end cap (12) is connected through screw with displacement transducer lower end cap (10); The iron core of displacement transducer (11) is connected with the guide rod of piston (8) through screw thread, and displacement transducer (11) is fixed on the opposite side of dynamic cylinder.
In the present invention program, there is elongated guide rod described piston (8) both sides, and piston (8) is that integral body processes with guide rod; And the outer surface of described piston (8) is processed with the wide balancing slit of the dark 1.0mm of 0.5mm.
In the present invention program, clearance seal is adopted in the sealing between described piston (8) and the cylinder body (9); This special envelope of low coefficient of friction is adopted in the elongated guide rod of piston (8) both sides and the sealing between cylinder body (9) end covers at two sides (6).
In the present invention program, described this special envelope is for being equipped with sealing material between end cap (6) and the end cap cover plate (7).
Beneficial effect of the present invention: of the present invention have and structure characteristic unique, different and the built-in dynamic test cylinder of traditional sensors, gives prominence in following several respects advantage:
1. be easy to make: velocity transducer and displacement transducer that the present invention adopts are approved products general, that market can be bought, need not especial manufacture.
2. Installation and Debugging are easy to maintenance: in Installation and Debugging when maintenance,, the loam cake of sensor is easy to dismounting, and two sensors also are easy to dismounting, installs and keep in repair very convenient, and sensor is installed zero point naked eyes and visiblely is easy to adjustment, shortens the time greatly.
3. practicability is good: piston and cylinder body adopt clearance seal, and piston guide rod and end cap adopt this special envelope sealing of low friction, satisfy the testing apparatus of medium testing precision requirement.
Sensor built-out type dynamic test cylinder of the present invention has the manufacturing of being easy to; Installation and Debugging are easy to maintenance, and testing precision is medium, and practicability is good; Satisfy industry electrohydraulic control frequency characteristic test requirement commonly used, be specially adapted to training and teaching with testing apparatus and Laboratory Furniture.
Description of drawings
Fig. 1 is a plan view of the present invention;
Fig. 2 is a plan view of the present invention;
The built-in dynamic test cylinder of Fig. 3 sketch.
Velocity transducer lower end cap in the drawings, 1; 2, velocity transducer upper end cap; 3, velocity transducer; 4, connect folder; 5, connecting screw rod; 6, end cap; 7, end cap cover plate; 8, piston; 9, cylinder body; 10, displacement transducer lower end cap; 11, displacement transducer; 12, displacement transducer upper end cap.
Embodiment
In conjunction with accompanying drawing the present invention is specifically described, shown in Fig. 1-2, this device overall structure mainly is made up of three parts: dynamic cylinder, velocity transducer 3 and displacement transducer 11;
Described dynamic cylinder is made up of piston 8, cylinder body 9 and cylinder body 9 end covers at two sides 6; Described velocity transducer 3 can be assemblied on the velocity transducer lower end cap 1 freely; Velocity transducer upper end cap 2 and velocity transducer lower end cap 1 are connected through screw; The moving bar of velocity transducer 3 is connected through the connecting screw rod of installing on the guide rod that connects folder 4 and piston 85, and velocity transducer 3 is fixed on a side of dynamic cylinder; Described displacement transducer 11 is assemblied on the displacement transducer lower end cap 10 freely; Displacement transducer upper end cap 12 and displacement transducer lower end cap 10 are connected through screw; The iron core of displacement transducer 11 is connected with the guide rod of piston 8 through screw thread, and displacement transducer 11 is fixed on the opposite side of dynamic cylinder.
In the present invention program, there is elongated guide rod described piston 8 both sides, and piston 8 is that integral body processes with guide rod; And the outer surface of described piston 8 is processed with the wide balancing slit of the dark 1.0mm of 0.5mm;
In the present invention program, clearance seal is adopted in the sealing between described piston 8 and the cylinder body 9; This special envelope of low coefficient of friction is adopted in sealing between the elongated guide rod of piston 8 both sides and cylinder body 9 end covers at two sides 6.
In the present invention program, described this special envelope is for being equipped with sealing material between end cap 6 and the end cap cover plate 7.
Shown in Fig. 1-2, the working principle in real work is: tested servovalve places the upper-end surface of cylinder body 9, is fastened on cylinder body 9 upper-end surfaces through screw.High pressure oil alternation under the effect of servovalve control signal gets into piston 8 both sides oil pockets, makes piston 8 in cylinder body 9, do the to-and-fro motion of certain frequency.Piston 8 to-and-fro motion are through connecting screw rod 5, connection folder 4, and the coil that drives velocity transducer 3 is done corresponding moving, thereby measure the instantaneous velocity of piston.The movement velocity of velocity transducer 3 output voltage signals and piston 8 is linear, and the output flow of the movement velocity of piston 8 and servovalve is proportional, so velocity transducer 3 output voltages reflect the Flow characteristics of servovalve indirectly.The instantaneous position of piston 8 in cylinder body 9 measured by being configured in cylinder body 9 right lateral position displacement sensors 11.Desirable servovalve frequency characteristic measurement state is the centre that piston 8 is positioned at cylinder body 9.The position of monitoring piston 8 is crucial for measuring accuracy in real time.
More than a kind of sensor built-out type dynamic test cylinder provided by the present invention has been carried out detailed introduction; Used concrete example among this paper principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and application area, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (4)
1. sensor built-out type dynamic test cylinder, it comprises velocity transducer (3), piston (8), displacement transducer (11); It is characterized in that: this device overall structure mainly is made up of three parts: dynamic cylinder, velocity transducer (3) and displacement transducer (11);
Described dynamic cylinder is made up of piston (8), cylinder body (9) and cylinder body (9) end covers at two sides (6);
Described velocity transducer (3) can be assemblied on the velocity transducer lower end cap (1) freely; Velocity transducer upper end cap (2) is connected through screw with velocity transducer lower end cap (1); The moving bar of velocity transducer (3) is connected through the connecting screw rod of installing on the guide rod that connects folder (4) and piston (8) (5), and velocity transducer (3) is fixed on a side of dynamic cylinder;
Described displacement transducer (11) is assemblied on the displacement transducer lower end cap (10) freely; Displacement transducer upper end cap (12) is connected through screw with displacement transducer lower end cap (10); The iron core of displacement transducer (11) is connected with the guide rod of piston (8) through screw thread, and displacement transducer (11) is fixed on the opposite side of dynamic cylinder.
2. a kind of sensor built-out type dynamic test cylinder according to claim 1 is characterized in that there is elongated guide rod described piston (8) both sides, and piston (8) is that integral body processes with guide rod; And the outer surface of described piston (8) is processed with the wide balancing slit of the dark 1.0mm of 0.5mm.
3. a kind of sensor built-out type dynamic test cylinder according to claim 1 and 2 is characterized in that clearance seal is adopted in the sealing between described piston (8) and the cylinder body (9); This special envelope of low coefficient of friction is adopted in the elongated guide rod of piston (8) both sides and the sealing between cylinder body (9) end covers at two sides (6).
4. a kind of sensor built-out type dynamic test cylinder according to claim 3 is characterized in that described this special envelope is for being equipped with sealing material between end cap (6) and the end cap cover plate (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210060624.3A CN102588387B (en) | 2012-03-09 | 2012-03-09 | External dynamic test cylinder of sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210060624.3A CN102588387B (en) | 2012-03-09 | 2012-03-09 | External dynamic test cylinder of sensor |
Publications (2)
| Publication Number | Publication Date |
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| CN102588387A true CN102588387A (en) | 2012-07-18 |
| CN102588387B CN102588387B (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210060624.3A Expired - Fee Related CN102588387B (en) | 2012-03-09 | 2012-03-09 | External dynamic test cylinder of sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090169A (en) * | 2014-11-18 | 2015-11-25 | 芜湖蓝宙电子科技有限公司 | Dynamic testing cylinder with sensors arranged externally |
| CN112709727A (en) * | 2020-12-10 | 2021-04-27 | 上海航天控制技术研究所 | Test system, debugging system and test method of direct-acting hydraulic valve |
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-
2012
- 2012-03-09 CN CN201210060624.3A patent/CN102588387B/en not_active Expired - Fee Related
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105090169A (en) * | 2014-11-18 | 2015-11-25 | 芜湖蓝宙电子科技有限公司 | Dynamic testing cylinder with sensors arranged externally |
| CN112709727A (en) * | 2020-12-10 | 2021-04-27 | 上海航天控制技术研究所 | Test system, debugging system and test method of direct-acting hydraulic valve |
| CN112709727B (en) * | 2020-12-10 | 2022-12-13 | 上海航天控制技术研究所 | Debugging system of direct-acting hydraulic valve |
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| CN102588387B (en) | 2015-07-01 |
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