KR20170044338A - Calibrating device for thrust measuring device - Google Patents

Calibrating device for thrust measuring device Download PDF

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Publication number
KR20170044338A
KR20170044338A KR1020150143902A KR20150143902A KR20170044338A KR 20170044338 A KR20170044338 A KR 20170044338A KR 1020150143902 A KR1020150143902 A KR 1020150143902A KR 20150143902 A KR20150143902 A KR 20150143902A KR 20170044338 A KR20170044338 A KR 20170044338A
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KR
South Korea
Prior art keywords
thrust
calibration
cell
engine
measuring
Prior art date
Application number
KR1020150143902A
Other languages
Korean (ko)
Inventor
김병현
곽도협
김희주
김보경
박건국
최희주
김은종
정상섭
김동식
Original Assignee
퍼스텍주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 퍼스텍주식회사 filed Critical 퍼스텍주식회사
Priority to KR1020150143902A priority Critical patent/KR20170044338A/en
Publication of KR20170044338A publication Critical patent/KR20170044338A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
    • G01L25/006—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency for measuring work or mechanical power or mechanical efficiency
    • 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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/12—Connections or attachments, e.g. turnbuckles, adapted for straining of cables, ropes, or wire
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/13—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the tractive or propulsive power of vehicles
    • G01L5/133—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the tractive or propulsive power of vehicles for measuring thrust of propulsive devices, e.g. of propellers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/14—Testing gas-turbine engines or jet-propulsion engines

Abstract

The present invention relates to a calibration device for a thrust measuring apparatus. The calibration device has an engine mounted on one side to provide a thrust to a thrust measuring apparatus having a measuring cell for measuring thrust, and compares and calibrates a measurement value of a measurement cell by the provided thrust with a measurement value for calibration. The calibration device comprises: a fixing jig connected to the thrust measuring apparatus; a thrust wire connected to the fixing jig; a calibration cell connected to the thrust wire; and a thrust generating means connected to the calibration cell to provide thrust to the thrust measuring apparatus through the thrust wire.

Description

[0001] CALIBRATING DEVICE FOR THRUST MEASURING DEVICE [0002]

The present invention relates to a thrust measuring apparatus for measuring the thrust of an engine mounted on an aircraft or the like. More particularly, the present invention relates to a thrust measuring apparatus for comparing the measured value of a thrust measuring apparatus with a measured value of a calibration cell, And more particularly, to a calibration apparatus for a thrust measuring apparatus.

Generally, the engine used in an aircraft can be divided into a reciprocating engine and a gas turbine engine, and a gas turbine engine is often used as a jet engine.

Unlike a reciprocating engine, such a jet engine (hereinafter referred to as an "airplane engine") is an engine having relatively low vibration and high efficiency because air is continuously sucked-compressing-burning- It is mainly used in high-altitude high-speed aircraft.

Reciprocating engines are widely used for ultra light aircraft and small helicopter engines because they are more efficient than gas turbine engines and are easier to maintain and manage when flying at low speeds and at low altitudes.

Since the performance of such an aircraft engine is a very important factor in aircraft flight, various performance tests and maintenance are carried out before the aircraft engine is mounted on a real aircraft.

On the other hand, there is an item to measure the thrust of the aircraft engine during the performance measurement of the aircraft engine, which is very important for securing stability of the aircraft.

Accordingly, a conventional Korean Patent No. 10-1473981 (hereinafter referred to as "Prior Art 1") includes a rocket engine mounted on a table and connected to a fuel line and having a combustor and a nozzle; A load cell connected to the table through a rod and receiving a force that the table is pushed by a reaction force generated in a combustion test of the rocket engine through the rod to measure thrust; A correcting means for correcting the load cell by adding a load to the load cell; And a control unit for storing the thrust measured by the load cell and controlling the operation of the correcting unit, wherein the correcting unit includes: a weight connected to the table via a calibration wire; An eccentric cam for selectively supporting the bottom of the weight by lifting or lowering the load by the weight to selectively attach the load cell to the load cell; A thrust measuring device of a rocket engine is disclosed.

The thrust measuring device of the rocket engine measures the horizontal one-component thrust component transmitted by the reaction force when the combustion gas is injected through the nozzle during the performance evaluation in the rocket engine combustion test, and real time thrust correction and thrust So that measurement and correction of accurate thrust can be performed.

Korean Patent No. 10-1059777 (hereinafter referred to as "Prior Art 2") includes a propellant storage tank; A rocket engine connected from said propellant storage tank; A propellant supply pipe which moves integrally with the rocket engine and connects the propellant storage tank and the jet portion of the rocket engine; A propellant supply valve formed in the propellant supply pipe; A front load cell for receiving a force through a forward propellant supply pipe located at the front of the propellant supply pipe and measuring a thrust force; A rear load cell contacting the rocket engine to apply thrust to the rocket engine; An engine support for supporting the rocket engine; A rail coupled to a lower end of the engine support; And a connecting device connecting the engine supporter and the rail and having a bearing mounted therein, wherein the propellant supply pipe includes a vertical direction supply pipe and a horizontal direction supply pipe, and the vertical direction supply pipe has flexibility A thrust measuring and correcting device for a rocket engine is disclosed.

The thrust measuring and correcting device of the rocket engine measures the thrust for the performance evaluation of the rocket engine and then the load cell is further mounted on the rear end of the rocket engine to simulate the thrust. It is possible to simply calibrate the elements.

However, in the conventional prior art documents 1 and 2, the thrust of the engine is measured and corrected according to the measured thrust value of the engine. Even though the measuring device for measuring the thrust of the engine is a very important device, There is no apparatus or method that can be calibrated.

Therefore, when an error occurs in the measuring apparatus, the thrust of the engine can not be accurately measured, and there is no way to correct the error of the measuring apparatus. Therefore, it is inconvenient and inconvenient to replace the measuring apparatus, .

The above-described thrust measuring apparatus and the technique therefor are described in detail in the following prior art documents, and a detailed description thereof will be omitted.

Korean Patent No. 10-1473981 Korean Patent No. 10-1059777

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a calibrating device capable of correcting errors of a measuring device for measuring thrust of an engine, The present invention provides a calibration apparatus for a thrust measuring apparatus, which can measure a thrust measuring apparatus easily, and can reduce the maintenance cost of the measuring apparatus.

According to another aspect of the present invention, there is provided a calibration device for a thrust measuring apparatus, including: a thrust measuring device having a measurement cell for measuring an thrust of an engine, Wherein the calibrating device comprises: a fixing jig connected to the thrust measuring device; A thrust wire connected to the fixed jig; A calibration cell connected to the thrust wire; And thrust generating means coupled to the calibration cell for providing thrust to the thrust measuring device via the thrust wire.

The thrust generating means includes a turnbuckle connected to the calibration cell and a fixed plate connected to the turnbuckle while being fixedly coupled to the fixed structure so that thrust force for pulling the thrust wire can be generated by rotating the turnbuckle have.

Preferably, the fixing jig is fixed to a mounting portion formed at an upper end of the thrust measuring device to which the engine is mounted.

In addition, it is preferable that the turnbuckle is provided with a hook member connected to the calibrating cell and the fixed plate at both ends of the body, respectively, and the both hook members are respectively coupled to the body of the turnbuckle by right-

According to the calibration device for a thrust measuring apparatus of the present invention, a thrust measuring device for measuring the thrust of the engine is connected to a calibrator, and a thrust for pulling the calibrator and the measuring device is simultaneously provided to the calibrator and the measuring device. The calibration of the thrust measuring device can be easily performed and the replacement of the thrust measuring device by the calibration can be eliminated. Therefore, the maintenance cost of the thrust measuring device can be reduced, There is an advantage of being able to measure accurately.

1 is a view showing an installation state of a thrust measuring apparatus according to the present invention.
2 is a block diagram of a calibration apparatus for a thrust measuring apparatus according to the present invention.
3 is an enlarged configuration diagram of part A of Fig.
4 is an enlarged configuration view of a portion B in Fig.
5 is a use state diagram of a calibration apparatus for a thrust measuring apparatus according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The terms used in the present invention are defined in consideration of the functions of the present invention and may vary depending on the intention or custom of the user or the operator. Therefore, the definitions of these terms are meant to be in accordance with the technical aspects of the present invention As well as the other.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention and are incorporated in and constitute a part of this specification. Embodiments that include components replaceable as equivalents in the components may be included within the scope of the present invention.

In addition, optional terms in the following embodiments are used to distinguish one element from another element, and the element is not limited by the terms. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

1 to 5 are views showing a calibration apparatus for a thrust measuring apparatus according to the present invention.

1 and 3, a thrust measuring apparatus 10 according to the present invention is provided with a mounting portion 10a on an upper end thereof for mounting an engine 1 for measuring a thrust of the engine 1 , The thrust of the engine 1 acts as a torque (rotational force) in the mounting portion 10a, and its torque is measured by a measuring cell provided in the thrust measuring apparatus 10, though not shown in the figure.

1, the thrust measuring apparatus 10 is vertically installed at one end of the base frame 20, and the mounting portion 10a of the thrust measuring apparatus 10 is provided with an aircraft engine 1 Respectively.

Since the aircraft engine 1 provided in the thrust measuring apparatus 10 is provided at a predetermined height or more in the base frame 20, a plurality of support frames 30 vertically installed at the other end of the base frame 20, And a hollow exhaust pipe (40) is provided on the support frame (30). At this time, the support frame 30 may be variously provided with different heights.

An exhaust duct 50 for exhausting exhaust gas is provided at the rear end of the exhaust pipe 40. A cover for preventing reverse flow of the exhaust gas flowing into the exhaust duct 50 is provided on the front face of the exhaust duct 50. [ (60) is detachably coupled.

Particularly, since the through hole through which the exhaust pipe 40 passes is eccentrically disposed in the cover 60, the position of the through hole can be different according to the position where the cover 60 is coupled to the front face portion of the exhaust duct 50 have.

Therefore, the position of the exhaust pipe 40 can be freely varied within the inside diameter of the exhaust duct 50 by the cover 60 as described above.

As described above, the engine 1 provided in the thrust measuring apparatus 10 is connected to a separate fuel supply line 2 to supply the fuel required for combustion to the engine 1.

Meanwhile, when the engine 1 is ignited, combustion takes place in the combustion chamber of the engine 1, and the exhaust gas generated in the combustion process is discharged to the outside do.

The discharged exhaust gas flows into the exhaust duct 50 through the exhaust pipe 40 and is exhausted. The reverse flow of the exhaust gas is blocked by the cover 60 on the front face of the exhaust duct 50.

On the other hand, the thrust of the engine 1 due to the combustion as described above acts as a torque in the mounting portion 10a of the thrust measuring apparatus 10, and this torque is measured in the measuring cell provided in the thrust measuring apparatus 10 .

Then, as described above, the thrust measuring apparatus 10 for measuring the thrust of the engine 1 is maintained through the calibrating device 100.

2 to 4, the calibration apparatus 100 includes a fixing jig 110 connected to a mounting portion 10a of an upper end portion of the thrust measuring apparatus 10 and a fixing jig 110 connected to the fixing jig 110 A thrust force wire 120 connected to the calibration cell 130 and connected to the thrust wire 120 and a thrust force sensor 130 connected to the calibration cell 130 to transmit thrust force to the thrust measuring device 10 through the thrust wire 120 And a thrust generating means for providing thrust force.

The fixing jig 110 is provided in the mounting portion 10a on which the engine 1 is mounted to provide the same environment as when the thrust of the engine 1 is measured.

The thrust wire 120 has hooks 121 fixed at both ends thereof connected to the fixing jig 110 and the calibrating cell 130 and connected to both ends of the thrust wire 120 by the two hooks 121. [ The fixing jig 110 and the calibration cell 130 are constrained.

The calibration cell 130 is configured to perform the same operation as the measurement cell provided in the thrust measuring apparatus 10, and the calibration cell 130 measures a force acting on both ends thereof. Connection rings 131 for firm connection between the hook 121 of the thrust wire 120 and the hook members 142 and 143 of the turnbuckle 140 to be described later are respectively provided at both ends of the calibration cell 130 . The connection ring 131 may be freely rotatable in the calibration cell 130.

The thrust generation means includes a turnbuckle 140 connected to the connection loop 131 of the calibration cell 130 and a fixed plate 150 connected to the turnbuckle 140 and coupled to a fixed structure such as a wall .

The turnbuckle 140 is provided with a calibration cell 130 and hook members 142 and 143 connected to the fixed plate 150 at the screw holes of the body 141 having screw holes formed at both ends thereof, And the two hook members 142 and 143 are coupled to the body 141 of the turnbuckle 140 with a right screw and a left screw, respectively.

The turnbuckle 140 rotates the body 141 in one direction so that the two hook members 142 and 143 are fastened to the body 141 and are moved into the body 141 so that the force that pulls the thrust wire 120 (Thrust) acts on the calibration cell 130 and the thrust measuring apparatus 10 in the same manner, so that the measured values measured in the measuring cell of the thrust measuring apparatus 10 and the measured values measured in the calibration cell 130 The measured values are compared to re-enter the function values so that the deviation of the measurement cells conforms to the calibration measurement value of the calibration cell 130. [

When the body 141 of the turnbuckle 140 is rotated in the opposite direction as described above, both the hook members 142 and 143 are pulled outward while being unwound from the body 141.

The fixing plate 150 is coupled to a fixing structure such as a wall and the fixing plate 150 on the opposite side of the fixing structure has a connection ring 151 .

The operation of the calibrating device for a thrust measuring apparatus according to the present invention will now be described.

5, the fixing jig 110 is mounted on the mounting portion 10a where the engine 1 is mounted during the thrust measurement of the engine 1 through the thrust measuring device 10 and the fixing jig 110 A hook 121 at one end of the thruster wire 120 is connected to a hook 121 at one end of the thruster wire 120 and a hook 121 at the other end of the thruster wire 120 is connected to a connecting loop 131 at one end of the calibrating cell 130, A hook member 142 at one end of the turnbuckle 140 is connected to the connection ring 131 at the other end of the calibration cell 130 and a hook member 143 at the other end of the turnbuckle 140 is connected to the connection ring 131 of the fixed plate 150 And is connected to the connection ring 151 to be installed.

In this state, the turnbuckle 140 is rotated to apply a thrust (force). That is, when the body 141 of the turnbuckle 140 is rotated in one direction, both hook members 142 and 143, which are coupled to both ends of the body 141 by left and right screws, respectively, The two hook members 142 and 143 are moved to the body 141 while being fastened to the body 141 by the rotation of the body 141. [

The movement of the two hook members 142 and 143 acts as thrust in the calibration cell 130 so that the measured value is displayed and the measured thrust is transmitted through the calibration cell 130 to the thrust wire 120 So that the torque is applied to the mounting portion 10a of the thrust measuring device 10. [

The torque acting on the thrust measuring device 10 through the mounting portion 10a is measured through the measuring cell of the thrust measuring device 10 so that the measured value of the measuring cell and the calibration measurement value of the calibration cell 130 And corrects the deviation of the measurement cell by re-inputting the function value so as to match the calibration measurement value of the calibration cell 130.

For example, if the thrust force of the thruster wire 120 is generated by rotating the turnbuckle 140 in one direction to generate thrust force of 10, (Load) is transferred to the calibration cell 130 as it is and the thrust of "10" is measured in the calibration cell 130 as it is and the thrust measurement device 120 is also measured through the thrust wire 120 connected to the calibration cell 130 When an error is detected in which the thrust measured in the measuring cell of the thrust measuring apparatus 120 is measured by a force of "9" or "11", the deviation of "10" Is re-entered by correcting the value of the function to match the measured value of the calibration cell (130).

Thereafter, the calibration operation as described above is performed again in accordance with the function value re-inputted to the measurement cell of the thrust measuring apparatus 10, and the deviation between the measurement value of the measurement cell and the calibration measurement value of the calibration cell 130 is compared.

Of course, such a calibration operation can be continuously performed until the measurement value of the measurement cell and the calibration measurement value of the calibration cell 130 are corrected within a required range.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

10: Thrust measuring device 10a: Mounting part
100: calibration device 110: fixing jig
120: thrust wire 121: hook
130: calibration cell 131: connection ring
140: Turnbuckle 141: Body
142, 143: hook member 150:
151: Connection ring

Claims (4)

There is provided a calibration apparatus for providing thrust to a thrust measuring apparatus having a measuring cell having a measuring cell mounted with an engine on one side thereof for comparing the measured value of the measuring cell with a measured value for calibration,
The calibration device includes: a fixing jig connected to the thrust measuring device;
A thrust wire connected to the fixed jig;
A calibration cell connected to the thrust wire; And
And thrust generating means connected to the calibration cell for providing thrust to the thrust measuring apparatus via the thrust wire.
The method according to claim 1,
The thrust generating means includes a turnbuckle connected to the calibration cell, and a fixed plate connected to the turnbuckle while being fixedly coupled to the fixed structure. The thrust force measuring device generates a thrust force for pulling the thrust wire by rotating the turnbuckle A calibration device.
The method according to claim 1,
Wherein the fixing jig is fixed to a mounting portion formed at an upper end of a thrust measuring device to which an engine is mounted.
The method according to any one of claims 1 to 3,
The turnbuckle is screwed to both ends of the body, respectively, with a hook member connected to the calibration cell and the fixed plate,
And the two hook members are respectively coupled to the body of the turnbuckle by a right-hand thread and a left-hand thread.
KR1020150143902A 2015-10-15 2015-10-15 Calibrating device for thrust measuring device KR20170044338A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101867395B1 (en) * 2017-08-01 2018-07-23 한국항공우주연구원 Solar panel unfold simulator frictional-tension force measuring instrument and a method of measurement using the device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101867395B1 (en) * 2017-08-01 2018-07-23 한국항공우주연구원 Solar panel unfold simulator frictional-tension force measuring instrument and a method of measurement using the device

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