KR101494291B1 - Thrust ＆ side-force measuring-device of thruster with rotary-type-valve and measuring-method thereof - Google Patents

Abstract

The present invention relates to a measuring device for thrust and side force of a thruster with a rotary valve and a measuring method thereof. The measuring device comprises: a supporting unit which is fixated to the bottom surface thereof; a valve assembly which is positioned at the top of the supporting unit; and a measuring unit which is to measure thrust and side force when the thrust is generated from the valve assembly. Therefore, the measuring device can measure thrust and side force using multiple axes, and can largely increase the range of measurable thrust by applying load cells to each of the axes.

Description

TECHNICAL FIELD [0001] The present invention relates to a thrust and a force measuring device, and more particularly, to a thrust and a force measuring device and a measuring method thereof for a thruster having a rotary valve,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a thrust measuring apparatus and a measuring method thereof, and more particularly, to a thrust measuring apparatus and a measuring method thereof, The present invention relates to a thrust and a force measuring device of a thruster having a typical valve and a measuring method thereof.

The thruster is a device that generates the reaction force generated by discharging the fluid filled in the inside, that is, the thrust. The thrusters are mounted on missiles, water bodies, space aircraft, etc., and are used to change the position of the installation.

In order to realize a precise position change, it is necessary to accurately predict the thrust generated in the thruster, so it is important to measure the thrust generated in the production of the thruster.

Conventionally, the measuring device capable of measuring the thrust was a one-axis type. In order to measure the thrust and thrust direction (tension / compression) generated when the thrust was generated, a weight was attached to the measuring device or a pneumatic device The preload was applied to the measuring device.

This conventional thrust device is capable of measuring only one axis, so that it is not possible to measure the lateral force involved in generating thrust. The technique of applying the preload to the measuring device using the weight can amplify the thrust vibration, A pressure regulator, a pneumatic cylinder or the like has to be provided in order to implement the pneumatic device, so that the construction of the pneumatic device is complicated and the cost is increased.

Korean Registered Patent No. 10-0445680 (Aug. 25, 2004) Korean Registered Patent No. 10-0758703 (2007.09.07.) Korean Registered Patent No. 10-1059777 (Aug. 22, 2011) Korean Registered Patent No. 10-1054734 (2011.08.01.)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems, and it is an object of the present invention to provide a measurement device capable of measuring multiple axes, and it is possible to measure force measurement simultaneously with thrust measurement and eliminate vibration accompanying thrust generation. And a thrust and a lateral force measuring device and a measuring method thereof for a thruster having a rotatable valve which can be manufactured at low cost.

According to an aspect of the present invention, there is provided a thruster and a lateral force measuring device of a thruster having a rotary valve. The thruster includes: at least two rotatable support bars hinged to the lower ends thereof on both sides of a stationary frame fixed to the floor; A supporting part composed of two conveying frames which are hinged to the upper ends of the respective rotatable support bars and which are equidistant from the fixing frame and which are mounted on the conveying frame and are erected so as to face each other so as to form a shaft rotatable along the width direction of the conveying frame; A shaft coupling portion mounted on a shaft provided in the bearing block is attached to one surface in the width direction and a gas supply portion is formed on one surface in the longitudinal direction so that a nozzle portion for discharging the gas filled in the gas supply portion is symmetric with the shaft coupling portion A valve assembly on the box provided with a valve shutter for opening and closing the nozzle section, A measuring unit including a load cell for measurement of lateral force provided on the transfer frame so as to be located at the lower end of the valve assembly and a thrust load cell fixed to the stationary frame to receive a force from the shaft coupling unit, And a thrust and a lateral force measurement device of the thruster having the rotary valve.

According to one aspect of the present invention, the inside of the valve assembly is formed in a cylindrical shape, the nozzle portion may be formed in the longitudinal center of the valve assembly, the valve shutter may be provided inside the valve assembly, And a driver connection part connected to a driver for actuating the valve shutter may be provided on one side of the valve assembly and an indicator spool .

According to another aspect of the present invention, a nozzle portion may be formed with a diffusion portion for inducing diffusion of the filler gas discharged from the valve assembly. The preload support portion includes two weight portions erected on the transfer frame, The preload bar may be positioned such that the preload bar is located at the top of the diffusion part, and the preload bar may be provided with a bolt through the preload bar and engageable with the diffusion part.

In order to achieve the above object, according to the thrust measuring method of a thruster having a rotary valve of the present invention, a bolt provided on a preload support is coupled to an upper end of a diffusion portion formed in a nozzle portion, A step for generating a thrust force for actuating a valve shutter provided in the valve assembly and discharging the gas to the outside through a diffusion part; a step for generating a force, which is caused by the generated thrust to move the valve assembly symmetrically with the nozzle part, There is provided a thrust measuring method of a thruster having a rotatable valve including a thrust measuring step of measuring a thrust by using a thrust load cell positioned adjacent to the thrust load cell.

In order to accomplish the above object, according to the present invention, there is provided a method of measuring a lateral force of a thruster having a throttle valve having a rotary valve, comprising the steps of: coupling a bolt provided in an preload support to an upper end of a diffusion portion formed in a nozzle portion, A measurement preparation step, a side force generating step of discharging the gas to the outside through a diffusion part by operating a valve shutter provided in the valve assembly, and a force for rotating the valve assembly by the generated side force, A lateral force measuring step of measuring the lateral force of the thruster by using a load cell.

According to the thrust and the lateral force measuring device and the measuring method of the thruster having the rotary valve according to the present invention, the thrust and the lateral force can be measured by using the multi-axis, and since the load cell is applied to each axis, There is an effect that the proposal disappears in the range of measurable thrust.

In addition, when one multiaxial load cell is applied, there is a disadvantage that it is difficult to accurately measure a small thrust force when there is a large difference in the range of thrust force to be measured, respectively. Precision can be improved.

In addition, by applying two common load cells, it is possible to reduce the cost of the thrust measuring apparatus.

Further, since the diffusing portion is fixed to the preload support using the bolt, the preload is applied, so that the vibration is reduced when the thrust is generated.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an outline view of a thrust and a lateral force measuring device of a thruster having a rotary valve according to an embodiment of the present invention;
Fig. 2 is a perspective view of the thrust and the lateral force measuring device of the thruster having the rotary valve of Fig. 1,
FIG. 3 is a perspective view of a throttle of a thruster with a rotary valve of FIG. 1 and a valve assembly included in the lateral force measurement apparatus,
FIG. 4 is a sectional view of the thrust of the thruster having the rotary valve of FIG. 1 and the valve assembly of the lateral force measuring device,
5 is a flow chart of a thrust measurement method of a thruster with a rotary valve according to an embodiment of the present invention;
6 is a flow chart of a lateral force measurement method of a thruster with a rotary valve according to an embodiment of the present invention;
7 is a perspective view of a thrust and a lateral force measuring device of a thruster having an actually manufactured rotary type valve according to the present invention,
FIG. 8 is a diagram showing the thrust of the thruster with the actually manufactured rotary valve of FIG. 7 and the operating state of the lateral force measuring device,
Fig. 9 is another operational state view of the thrust and lateral force measuring device of the thruster with the actually manufactured rotary valve of Fig. 7; Fig.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The exemplary embodiments of the present invention may be embodied in many different forms without departing from the scope of the present invention. It is not limited to the embodiment.

2 is a perspective view of a thrust and a lateral force measuring device of a thruster having a rotary valve of FIG. 1, and FIG. 3 is a perspective view of the thrust and the lateral force measuring device of the thruster of FIG. FIG. 4 is a cross-sectional view of a throttle valve of the thruster having the rotary valve of FIG. 1 and a valve assembly of the lateral force gauge of the thrust device and the lateral force gauge of the thruster having the rotary valve of FIG. 1 .

As shown in FIG. 1, the thrust and lateral force measuring device of the thruster having the rotary type valve of the present invention charges high pressure air from an external high-pressure air supply device I, And the thrust is generated by discharging the charged high-pressure air at a time, and the generated thrust F1 and the lateral force F2 are transmitted to the thrust load cell 420 and a lateral load cell 410. [

At this time, an external DAQ (data acquisition device) is provided and atmospheric pressure and atmospheric temperature are recorded using a pressure sensor PS and a temperature sensor TS at the time of measurement, and the thrust load cell 420 and the lateral force The load cell 410 stores the measured force.

2 to 4, the thrust and lateral force measuring device of the thruster having the rotary type valve of the present invention includes a supporting part 100 fixed to the ground, a valve assembly 200 positioned at the upper end of the supporting part 100, And a measuring unit 400 for measuring the thrust F 1 and the lateral force F 2 when the thrust is generated from the valve assembly 200.

Two or more rotatable support bars 120 each having a lower end fixed to both sides of a fixed frame 110 fixed to the floor and an upper end of each rotatable support bar 120 fixed to the fixed frame 110, A supporting part 100 composed of two conveying frames 130 which are equally wide and two bearing blocks 140 which are attached on the conveying frame 130 and are erected so as to face each other so as to form a shaft rotatable along the width direction of the conveying frame 130 It is equipped with a test stand.

A valve assembly 200, a preload support 300 and a measuring part 400 are positioned on the upper part of the support part 100. The valve assembly 200 is mounted on a shaft provided in the bearing block 140, And a nozzle unit 230 for discharging the gas filled in the gas supply unit 220 through the gas supply unit 220 is provided on the one side of the axis in the width direction, And a valve shutter 240 formed symmetrically with the coupling part 210 and opening and closing the nozzle part 230. [

The preload support 300 is provided in the transfer frame 130 so as to apply a preload to the valve assembly 200.

The measurement unit 400 includes a lateral load cell 410 provided on the transfer frame 130 so as to be positioned at the lower end of the valve assembly 200 and a fixed load cell 410 fixed to the fixed frame 110 to receive a force from the axial coupling unit 210. [ And a thrust load cell (420).

The lateral load cell 410 for measuring the lateral force F2 applied to the valve assembly 200 supports the nozzle unit 230. [

In the fixed frame 110, a thrust load cell 420 is installed vertically and fixes the measuring device to the floor.

The transfer frame 130 is connected to the fixed frame 110 via the rotatable support bar 120 and has a forward / backward degree of freedom by the rotatable support bar 120, Can be measured.

The valve assembly 200 is an assembly of a rotary valve shutter 240 and a nozzle unit 230 for adjusting the thrust F1 and corresponds to a test set. Bearing block 140 is a component that supports the shaft of valve assembly 200 and is rotatably mounted about its axis to provide a degree of freedom in the direction of force F1.

Referring to FIG. 4, the filling gas discharged to the outside through the nozzle unit 230 is discharged to the outside along the diffusion unit 231. At this time, the valve assembly 200 is brought into contact with the outside air to generate a frictional force, and a force perpendicular to the filling gas discharged due to frictional force is applied to the valve assembly 200.

The valve assembly 200 is coupled to the shaft provided in the bearing block 140 by the shaft coupling portion 210 so that the valve assembly 200 rotates about an axis built in the shaft coupling portion 210.

When the width of the valve assembly 200 is L, the moment generated in the shaft built in the shaft coupling portion 210 is referred to as a roll moment M2. (F2 * L = M2)

The valve assembly 200 is pushed by the thrust F1 and the thrust load cell 420 standing on the fixed frame 110 is brought into contact with the shaft assembly 210 by the pushing and pulling of the valve assembly 200 And the thrust F1 is measured by being synchronized.

The roll moment M2 is generated by the lateral force F2 generated simultaneously with the generation of the thrust F1 so that the lateral load cell 410 positioned at the lower end of the valve assembly 200 is rotated by the roll moment M2 200, respectively. And the lateral force F2 is calculated based on this.

The inside of the valve assembly 200 is formed in a cylindrical shape, and the nozzle portion 230 is formed in the longitudinal center of the valve assembly 200.

The valve shutter 240 is provided inside the valve assembly 200 and is configured to be rotatable along the inner curvature of the valve assembly 200.

A driver connection part 250 connected to the driver A for actuating the valve shutter 240 is provided on one side of the valve assembly 200. A position of the valve shutter 240 can be determined outside the driver connection part 250 The indicator needle 251 is provided.

The nozzle unit 230 is formed with a diffusion part 231 for guiding the diffusion of the filling gas discharged from the valve assembly 200.

The preload support 300 includes two weights 310 standing on the transfer frame 130 and a preload bar 320 on both sides of which the weights 310 are fixed.

The preload support 300 is positioned so that the preload bar 320 is positioned at the upper end of the diffusion portion 231 and the bolt 330 which can pass through the preload bar 320 and can be coupled to the diffusion portion 231, Bar 320 as shown in FIG.

The thrust and lateral force measuring device of the thruster having the rotary valve of the present invention configured as described above is characterized in that the thrust and lateral force measuring device of the thruster having the above-described configuration is constituted by one axis in the direction of the roll moment M2 generated by the lateral force F2, It is possible to measure the thrust F1 and the lateral force F2 through the respective thrust load cell 420 and the lateral load cell 410. [

5, the method of measuring thrust of a thruster having a rotary valve according to an embodiment of the present invention is characterized in that the bolts 330 provided in the preload support 300 are inserted into a diffusion part (not shown) formed in the nozzle part 230 (S11) of applying a preload to the valve assembly 200 by coupling the valve assembly 200 to the upper end of the valve assembly 200 and the valve shutter 240 provided in the valve assembly 200 after filling the valve assembly 200 with gas. A force generating step S12 for actuating the valve unit 200 to discharge the gas along the diffusion unit 231 to the outside and a force for pushing the valve assembly 200 by the generated thrust F1 is symmetric with the nozzle unit 230 And a thrust measuring step (S13) of measuring a thrust force by using a thrust load cell (420) positioned adjacent to the valve assembly (200).

Since the upper end of the diffusion portion 231 is fastened to the preload support 300 with the bolts 330 to support the valve assembly 200, the vibration is not amplified when the thrust F1 is generated.

6, in the lateral force measurement method of a thruster having a rotary valve according to an embodiment of the present invention, a bolt 330 provided in the preload support 300 is inserted into a diffusion part (not shown) formed in the nozzle part 230 231 of the valve assembly 200 to apply a preload to the valve assembly 200 after the valve assembly 200 is filled with the gas and the valve shutter 240 provided in the valve assembly 200, A lateral force generating step S22 for discharging the gas along the diffusion part 231 to the outside by driving the valve assembly 200 at the lower end of the diffusion part 231 by the action of the generated lateral force F2, And a lateral force measurement step S23 for measuring the lateral force using the lateral force load cell 410.

The upper end of the diffusion portion 231 is fastened to the preload support 300 by the bolts 330 and the preload is applied to the valve assembly 200 so that when the thrust F1 is generated, The magnitude and direction of the lateral force F2 can be measured.

7 to 9 show a thrust and a lateral force measuring device of the thruster having the rotary type valve of the present invention, which is constructed as described above, and actually measures the thrust F1 and the lateral force F2, And the vertical force is measured at the same time. Therefore, the thrust F1 and the lateral force F2 are measured at the same time, thereby realizing a biaxial, multi-axial thrust measuring device.

As described above, since the valve assembly 200 is maintained in a state in which the preload is applied by the preload support 300, the vibration is not amplified when the thrust F1 is generated, and the direction of the lateral force F2 It is possible to measure the lateral force F2 without measuring the direction, and the direction can also be measured.

100: Support part 110: Fixing frame
120: rotatable support bar 130: transport frame
140: Bearing block 200: Valve assembly
210: shaft coupling part 220: gas supply part
230: nozzle unit 231:
240: valve shutter 250: actuator connecting portion
251: indicating needle 300: preloading support
310: weight portion 320: preload bar
330: bolt 400: measuring part
410: load cell for measurement of force 420: thrust load cell
S11: Thrust measurement preparation step S12: Thrust generation step
S13: Thrust measurement step
S21: Measuring preparation for lateral force measurement S22:
S23: Measurement of lateral force

Claims (7)

A transfer frame having two or more rotatable support bars with respective lower ends fixed to both sides of a fixed frame fixed to the floor, a transfer frame fixed to an upper end of each rotatable support bar and having the same width as the fixed frame, And two bearing blocks erected to face each other to form a rotatable shaft along the width direction of the transfer frame;
A shaft coupling portion mounted on a shaft provided in the bearing block is attached to one surface in a width direction, a gas supply portion is formed on one surface in the longitudinal direction, and a nozzle portion for discharging the gas filled in the gas supply portion through the gas supply portion, A valve assembly on the box formed symmetrically and provided with a valve shutter for opening and closing the nozzle section;
A preload support provided on the transfer frame for applying a preload to the valve assembly;
And a measurement unit including a load cell for measuring the lateral force provided on the transfer frame so as to be positioned at the lower end of the valve assembly and a thrust load cell fixed to the fixed frame to receive a force from the shaft coupling unit, Thrust and lateral force measuring device of a thruster. The method according to claim 1,
Wherein the inside of the valve assembly is formed in a cylindrical shape, and the nozzle portion is formed in the longitudinal center of the valve assembly. 3. The method of claim 2,
Wherein the valve shutter is provided within the valve assembly,
Wherein the valve shutter is rotatable along the inner curvature of the valve assembly. 3. The method of claim 2,
And an indication needle is provided on the outside of the driver connection part to identify the position of the valve shutter. 3. The method of claim 2,
Wherein the preload support base comprises two weight portions standing on the transport frame and an preload bar on both sides of which are fixed the top of the weight portion. 6. The method of claim 5,
The preload bar is positioned such that the preload bar is positioned at the top of the diffuser,
And a bolt penetrating through the preload bar and engageable with the diffusion unit is provided on the preload bar. A measurement preparation step of attaching a bolt provided in the preload support to an upper end of a diffusion part formed in the nozzle part to apply a preload to the valve assembly;
A thrust generating step of charging the gas in the valve assembly and then operating a valve shutter provided in the valve assembly to discharge the gas along the diffusion unit to the outside;
And a force for pushing the valve assembly by a generated thrust is measured using a thrust load cell positioned symmetrical to the nozzle unit and positioned adjacent to the valve assembly,
And a measuring step of measuring a force by which the valve assembly is rotated by the generated lateral force using a load cell for measuring lateral force located at a lower end of the diffusion part.

Images