KR102191413B1 - Servo valve controlled type valve driving apparatus - Google Patents

Abstract

The present invention relates to a servo valve control-type valve driving apparatus capable of minimizing an error when controlling the angle of a valve shaft of a rotary openable valve by changing a gear coupling structure of an existing driving part to a link coupling structure, and conveniently controlling the angle of a rotary openable valve from a closed state to a completely open state. A cylinder rod of a hydraulic cylinder moves linearly while moving back and forth in accordance with the control of a servo valve, and a driving part receives the linear movement of the cylinder rod and converts the same into a rotation movement to rotate a valve shaft of a rotary openable valve. The driving part includes: a driving box installed between the hydraulic cylinder and the rotary openable valve in the form of a box with an open upper part, having one side penetrated by an end of the cylinder rod of the hydraulic cylinder to be inserted and withdrawn inward, and having a lower side penetrated by the valve shaft of the rotary openable valve penetrated to protrude upward; a driving link having one end pin-jointed to an end of the cylinder rod; a rotary link having one end pin-jointed to the other end of the driving link, and having the other end fixed and coupled to be rotated together with the valve shaft; and a driving cover closing the open upper part of the driving box.

Description

Servo valve control type valve driving device {SERVO VALVE CONTROLLED TYPE VALVE DRIVING APPARATUS}

The present invention relates to a valve driving device for adjusting the opening angle of a rotary open/close type valve, and more particularly, convert the linear motion of a cylinder rod controlled by a servo valve into a rotary motion to precisely adjust the open angle of the rotary open/close type valve. It relates to a servo valve control type valve drive device that can be adjusted.

In general, the auxiliary power system of an aircraft is usually used when the aircraft is on the ground and during take-off and landing, i.e. when the main engine is turned off or when it is required to generate a large amount of thrust to the main engine, and when the aircraft has entered the cruise phase. The auxiliary power system is turned off in order to reduce fuel consumption.

As shown in FIG. 1, the auxiliary power device supplies hydraulic pressure supplied through a fuel control unit (FCU) to each of the IGV actuator 1 and the surge valve assembly 2, thereby supplying the inlet guide blades (IGV, Inlet). Guide Vane) and rotary open/close type valve, respectively

In other words, the IGV actuator 1 controls the opening of the inlet guide blade (IGV) to adjust the output of the auxiliary power unit to adjust the inlet air inflow amount, and the surge valve assembly 2 has too much pressure of the auxiliary power unit. If it is high, it plays a role of reducing the pressure to an appropriate pressure by adjusting the opening degree of the rotary switch valve.

This surge valve assembly 2 converts the linear motion of the cylinder rod 21 of the hydraulic cylinder 20 controlled by the servo valve 10 into rotational motion through the drive unit 30 as shown in FIG. It is a servo valve control valve driving device capable of precisely adjusting the opening angle of the rotary opening and closing valve 40.

A detailed configuration of the servo valve control valve driving apparatus according to the prior art as described above will be described with reference to FIGS. 2 to 6. In the servo valve 10, when an input current is applied to the coil 11 to form a magnetic polarity in the armature 12, as shown in FIGS. 2 to 4, the armature located between the upper and lower magnets 13 ( 12) moves toward the upper or lower magnet 13 according to the magnitude and polarity of the input current. Accordingly, the flapper 14 integrally connected to the armature 12 tilts to the left or right to change the combination of the left and right nozzles 15, and the change in the back pressure of the left and right nozzles 15 is connected to each nozzle 15, respectively. Move the spool (16) left and right. As the spool 16 moves left and right in this way, a flow path is formed from the pressure port to the forward port 17 or the reverse port 18 to supply the control flow to the hydraulic cylinder 20. The position is determined as the cylinder rod 21 installed inside the hydraulic cylinder 20 moves back and forth by force.

As shown in Figs. 5 and 6, the cylinder rod 21 of the hydraulic cylinder 20 moves back and forth under the control of the servo valve 10 to perform a linear motion, and this linear motion of the cylinder rod 21 The driving unit 30 is transmitted and converted into a rotational motion to rotate the valve shaft 41 of the rotational opening/closing type valve 40, so that the opening angle of the rotational opening/closing valve 40 can be precisely adjusted.

At this time, the drive unit 30 is coupled to the cylinder rod 21, the rack gear 31 moving forward and backward together, the pinion gear 32 and the pinion gear 32 engaged with the rack gear 31 to rotate And a driving gear 33 engaged with and rotating, and the driving gear 33 is coupled coaxially with the valve shaft 41 of the rotary open/closed valve 40 to rotate together. Therefore, under the control of the servo valve 10, the cylinder rod 21 of the hydraulic cylinder 20 moves back and forth, and the rack gear 31 coupled to the cylinder rod 21 moves back and forth together, and the rack gear ( 31) The rotational force of the pinion gear 32 engaged with the drive gear 33 is transmitted to the drive gear 33, and the valve shaft 41 rotates with the drive gear 33 rotating, so that the opening of the rotary open/close valve 40 The angle is adjusted.

In the case of the servo-valve-controlled valve driving device according to the prior art described above, the driving unit 30 converting the linear motion of the cylinder rod 21 into a rotational motion toward the valve shaft 41 includes a rack gear 31 and a pinion gear. 32) and the drive gear 33 are gear-coupled in order, so there is a problem that an error occurs during position control due to backlash between the gears.

In addition, the angle from the closed state to the completely open state of the rotational opening and closing valve 40 according to the size or type of the rotational opening and closing valve 40 in a state in which the normal forward and backward distance of the cylinder rod 21, that is, a stroke is determined. The pinion gear 32 and the drive gear 33 have to be adjusted through a gear ratio, and there is a problem in that each gear needs to be replaced or the drive unit 30 itself needs to be replaced in order to match the gear ratio.

The object of the present invention, conceived to solve the above problems, is to minimize errors in the angle control of the valve shaft of the rotary open/close type valve by changing to a link coupling structure by breaking away from the gear coupling structure of the conventional driving unit, and closing the rotary open/close type valve The objective is to provide a servo valve-controlled valve driving device that can conveniently adjust the angle from the state to complete opening without replacing the driving part.

In order to achieve the above object, the servo valve-controlled valve driving device according to the present invention performs linear motion while the cylinder rod of the hydraulic cylinder moves back and forth according to the control of the servo valve, and the drive unit transmits the linear motion of the cylinder rod. In the servo-valve-controlled valve driving device that receives and converts into a rotational motion to rotate the valve shaft of the rotational opening/closing type valve, the driving unit is installed between the hydraulic cylinder and the rotational opening/closing valve in a box shape with an open top, and the The cylinder rod end of the hydraulic cylinder penetrates and is installed so as to be drawn in and out, and a drive box is installed so that the valve shaft of the rotary open/close valve penetrates and protrudes upward, and one end is pin-jointed to the end of the cylinder rod. It characterized in that it comprises a drive link, one end pin-jointed to the other end of the drive link, the other end is fixedly coupled to rotate with the valve shaft, and a drive cover for closing the open upper portion of the drive box. do.

In addition, the driving link is characterized in that it comprises a pair of upper and lower driving links arranged in parallel so as to face each other vertically while interposing each of the cylinder rod and the rotation link pin-jointed at both ends.

In addition, the driving link is coupled by vertically penetrating the upper driving link and the lower driving link between the pin joints at both ends, and when the rotating link rotates according to the withdrawal of the cylinder rod, the upper driving link and the lower driving link It characterized in that it further comprises a stopper bolt for limiting the rotation angle of the rotation link by contacting the side of the rotation link adjacent to the space between the links.

In addition, in the driving link, a long angle adjustment hole is formed vertically through each of the upper driving link and the lower driving link in the longitudinal direction between the pin joints at both ends, and the stopper bolt is configured to adjust the angle of the driving link. It is coupled to be movable along the longitudinal direction of the hole to adjust the rotation angle of the rotation link, the drive link, further comprising a stopper nut coupled to the stopper bolt to fix the position of the stopper bolt in the angle adjustment hole It features.

In addition, the stopper bolt is a flange bolt integrally provided with a bolt washer with serrations formed between the bolt body and the bolt head, and the stopper nut is a nut with serrations formed on the surface facing the bolt washer of the stopper bolt It is characterized in that the washer is integrally provided with a flange nut.

In addition, the driving link is inserted into the bolt body of the stopper bolt so as to be positioned between the upper driving link and the lower driving link, further comprising a gap maintaining member for maintaining a gap between the upper driving link and the lower driving link It is characterized by that.

The servo-valve-controlled valve driving apparatus according to the present invention can minimize errors in angle control of the valve shaft of the rotary open/close type valve by changing to a link coupling structure through a drive link and a rotary link by breaking away from the gear coupling structure of the conventional drive unit.

In addition, when the drive link is structured as a pair of upper drive link and lower drive link, and the rotational opening/closing valve is fully opened through a stopper bolt, the effect of controlling the rotation angle of the rotational link that rotates the valve shaft more precisely is possible. have.

In addition, the angle from the closed state to the full opening of the rotating open/closed valve through a stopper bolt that forms a long angle adjustment hole through the drive link and moves along the length direction of the angle adjustment hole and a stopper nut that fixes the position of the stopper bolt. There is an effect that can be adjusted conveniently without replacement of the driving unit, and by forming serrations on the bolt washers and nut washers integrally formed on the stopper bolt and the stopper nut, it is possible to achieve a more robust stopper bolt position fixation.

1 is a hydraulic flow chart schematically showing a general auxiliary power device,
2 is a perspective view showing a servo valve control type valve driving device according to the prior art corresponding to the surge valve assembly in the embodiment of FIG. 1,
Figure 3 is a plan view of the embodiment of Figure 2,
4 is a cross-sectional view taken along line A-A' of the embodiment of FIG. 3,
5 and 6 are plan views showing the operation process by separately expanding only the driving unit in the embodiment of FIG. 3,
7 is a perspective view showing an embodiment of a servo valve control valve driving device according to the present invention,
8 is an exploded perspective view showing an enlarged cylinder rod, a valve shaft, and a driving unit in the embodiment of FIG. 7;
9 is a plan view of the embodiment of FIG. 7,
10 and 11 are plan views showing the operation process by separately expanding only the drive in the embodiment of FIG. 9,
12 is an enlarged perspective view showing a main part of the embodiment of FIG. 7 by grafting another embodiment of a driving link together with a cylinder rod, a rotation link, and a valve shaft,
13 is a perspective view of a main part showing a state in which the rotation link and the valve shaft rotate according to the withdrawal of the cylinder rod in the embodiment of FIG. 12;
14 and 15 are plan views showing the embodiment of FIGS. 12 and 13 based on a drive box,
16 is an exploded perspective view showing an enlarged main part of the embodiment of FIG. 7 by grafting another embodiment of a driving link together with a cylinder rod, a rotation link, and a valve shaft,
FIG. 17 is a perspective view showing the main parts of the rotation link and the valve shaft rotated according to the withdrawal of the cylinder rod in the embodiment of FIG. 16.

Hereinafter, a preferred embodiment of the servo valve control valve driving apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

In the servo valve-controlled valve driving apparatus according to the present invention, the cylinder rod 210 of the hydraulic cylinder 200 is moved back and forth according to the control of the servo valve 100 as shown in FIGS. 7 and 9 with reference to FIGS. 1 to 4. While moving, the linear motion of the cylinder rod 201 is received by the driving unit 300 and converted into a rotary motion to rotate the valve shaft 410 of the rotary open/close type valve 400.

The servo valve 100 is a control valve that controls pressure or flow rate by a mechanical or electrical input signal, and its configuration and operation principle are widely known in the art, and since it has been sufficiently described in the technology behind the invention, a detailed description thereof will be omitted. . According to the control of the servo valve 100, the cylinder rod 210 of the hydraulic cylinder 200 is moved back and forth, and the forward and backward linear motion of the cylinder rod 210 is converted into a rotational motion through the driving unit 300, and the final rotational opening and closing type By rotating the valve shaft 410 of the valve 400, it is intended to adjust the opening angle of the rotary opening/closing valve 400.

In particular, the servo valve-controlled valve driving device according to the present invention has a structural change different from the conventional one of the servo valve 100, the hydraulic cylinder 200, the driving unit 300, and the rotary opening/closing valve 400. In order to minimize errors in the angle control of the valve shaft 410 of the rotary open/close type valve 400, and to conveniently adjust the angle from the closed state to the full open of the rotary open/close type valve 400 without replacing the driving unit 300 I want to.

That is, the driving unit 300 includes a driving box 310, a driving link 320, a rotating link 330, and a driving cover 340, as shown in FIGS. 7 to 11. The drive box 310 is installed between the hydraulic cylinder 200 and the rotary open/close valve 400 in a box shape with an open top, and the end of the cylinder rod 210 of the hydraulic cylinder 200 penetrates through one side. The valve shaft 410 of the rotary open/close type valve 400 passes through and is installed so as to protrude upward on the lower surface thereof.

The driving link 320 has one end pin-jointed to the end of the cylinder rod 210, the rotation link 330 has one end pin-jointed to the other end of the driving link 320, and the other end is the valve shaft 410 It is fixedly coupled to rotate with. Here, the cylinder rod 210, the drive link 320, the rotation link 330, and the valve shaft 410 are used as one mechanism (mechanism), and among the four-fold mechanisms, they correspond to the slider-crank mechanism. That is, the cylinder rod 210 is a slider, the driving link 320 is a lever, the rotation link 330 is a crank, and the valve shaft 410 is an output rotation shaft.

In particular, there is a relationship position in which the stroke of the cylinder rod 210, which is a slider, does not pass through the valve shaft 410, which is the rotation center of the rotation link 330, which is a crank, and this is called an eccentric slider-crank mechanism, and according to the present invention The link coupling structure constituting the driving unit 300 of the servo valve-controlled valve driving device according to the above adopts an eccentric slider-crank mechanism. Therefore, when the cylinder rod 210 moves linearly back and forth, the linear motion of the cylinder rod 210 rotates the rotary link 330 through the drive link 320, and the rotary motion of the rotary link 330 It will rotate (410).

The driving cover 340 closes the open upper part of the driving box 310 so that other foreign substances, etc. are not introduced into the driving box 310. As shown in the drawing, the driving box 310 and the driving cover 340 have a cube shape with rounded vertices, but may have various shapes without being restricted thereto. As shown in the drawing, the drive cover 340 has a through hole (not shown) through which the upper end of the valve shaft 410 penetrates, and the through hole changes the rotation angle of the valve shaft 410 to the outside. It is to check visually.

As the cylinder rod 210 and the valve shaft 410 together with the driving link 320 and the rotation link 330 of the driving unit 300 as described above have a link coupling structure, in particular, an eccentric slider-crank mechanism, a rotational opening and closing valve It is possible to minimize the error when controlling the angle of the valve shaft 410 of (400).

On the other hand, by adopting the driving unit 300 as a link coupling structure, there is an advantage in that precise position and angle control is easy, but the link coupling structure may also have minimal design and assembly errors, and in particular, the rotational opening and closing valve 400 is closed. If the total opening angle is set to 89.13° when fully open in the state, a precise angle limiting function may be required when fully open.

Accordingly, the rotation angle of the valve shaft 410 is determined when the cylinder rod 210 is pulled in and pulled in, but the rotation angle of the valve shaft 410 may vary each time due to a slight error during pulling in. . To prevent this, by improving the structure of the driving link 320 as shown in FIGS. 12 to 15, and limiting the rotation angle of the rotation link 330 when the cylinder rod 210 is withdrawn through the stopper bolt 323 It will be possible to precisely specify the rotation angle of the final valve shaft 410.

That is, the driving link 320 is a pair of upper driving links 321 arranged in parallel so as to face each other in the vertical direction with the cylinder rod 210 and the rotation link 330 pin-joined at both ends, respectively, and It includes a lower driving link 322. In other words, there is a lower driving link 322 in the lowermost layer, an upper driving link 321 in the uppermost layer, and the cylinder rod 210 and rotation in the intermediate layer between the upper driving link 321 and the lower driving link 322 Links 330 are each located. This structure is to prevent interference with the cylinder rod 210 or the rotation link 330 while the driving link 320 is swinging.

At this time, the driving link 320 is coupled vertically through the upper driving link 321 and the lower driving link 322 between the pin joints at both ends as shown in Figs. 12 and 13, and the cylinder rod ( When the rotation link 330 rotates as shown in FIGS. 13 and 15 according to the withdrawal of 210), the rotation link 330 approaches the space between the upper driving link 321 and the lower driving link 322 It may further include a stopper bolt 323 for limiting the rotation angle of the rotation link 330 by contacting the side of the.

Therefore, when the cylinder rod 210 is withdrawn, the valve shaft 410 rotates according to the oscillation of the driving link 320 and the rotation of the rotation link 330, when the rotation angle of the valve shaft 410 is completely opened. If the maximum angle of is previously set, it is possible to limit the rotation angle of the rotation link 330 through the stopper bolt 323 regardless of the maximum withdrawal distance of the cylinder rod 210, and accordingly, the final valve shaft ( The rotation angle at the time of full opening of 410) can also be adjusted to a preset maximum angle.

In addition, when the type of the rotational opening/closing valve 400 or the rotation angle when the valve shaft 410 is fully opened is changed, a problem arises in that all configurations of the driving unit 300 must be changed. The above-described stopper ball 323 By expanding the function of ), the rotation angle limit of the rotation link 330 may be adjusted according to the rotation angle when the valve shaft 410 is fully opened.

That is, the driving link 320 has a long angle adjustment hole 324 between the pin joints at both ends along the length direction, as shown in FIGS. 16 and 17, the upper driving link 321 and the lower driving link 322 ) Is formed vertically through each, and the stopper bolt 323 is coupled to be movable along the length direction of the angle adjustment hole 324 of the driving link 320 to adjust the rotation angle of the rotation link 330 do. At this time, the driving link 320 may further include a stopper nut 325 coupled to the stopper bolt 323 to fix the position of the stopper bolt 323 in the angle adjustment hole 324.

Therefore, the stopper bolt 323 is not located only at a specific point on the driving link 320 as shown in Figs. 12 to 15, but in the longitudinal direction of the driving link 320 as shown in Figs. Along the long-shaped angle adjustment hole 324 is formed, the stopper bolt 323 can be moved in position along the length direction of the angle adjustment hole 324, so that the rotation angle of the rotation link 330 can be arbitrarily adjusted. Finally, the maximum opening angle of the valve shaft 410 is also adjustable.

At this time, the stopper nut 325 is required to fix the position of the stopper bolt 323, and when the stopper bolt 323 and the stopper nut 325 are coupled, the screw connection becomes loose and the initial fixed position may be distorted. It is necessary to have a prevention function or a configuration that can control position movement. To this end, as shown in FIGS. 16 and 17, the stopper bolt 323 is a flange bolt integrally provided with a bolt washer 323c having a serration (S) formed between the bolt body 323a and the bolt head 323b. And, the stopper nut 325 may be a flange nut integrally provided with a nut washer 325a having a serration (S) formed on a surface of the stopper bolt 323 facing the bolt washer 323c.

In the drawing, the serration (S) is seen only in the nut washer 325a of the stopper nut 325, but the serration (S) is also formed under the bolt washer 323c of the stopper bolt 323. These serrations (S) contact the surfaces of each of the upper driving link 321 and the lower driving link 322 to maximize friction and achieve a more sturdy bolt coupling, thereby preventing loosening and limiting movement after fixing the position. Plays a role.

However, if the two sides are coupled so as to be too strong for a solid coupling between the stopper bolt 323 and the stopper nut 325, the distance between the upper driving link 321 and the lower driving link 322 becomes fine, The rotational friction between the pin-jointed cylinder rod 210 and the rotation link 330 at both ends may increase. Therefore, in order to prevent this, a gap maintaining member 326 may be provided to enable a firm coupling between the stopper bolt 323 and the stopper nut 325 while maintaining the gap between the upper driving link 321 and the lower driving link 322. I can.

That is, the driving link 320 is inserted into the bolt body 323a of the stopper bolt 323 so as to be positioned between the upper driving link 321 and the lower driving link 322 as shown in Figs. It may further include a gap maintaining member 326 for maintaining a gap between the upper driving link 321 and the lower driving link 322. Therefore, even if both sides are strongly coupled to each other for a solid coupling between the stopper bolt 323 and the stopper nut 325, the upper and lower drive links 321 and the lower drive link 322 ) It is possible to prevent the problem of increasing rotational friction between the pin-jointed cylinder rod 210 and the rotation link 330 at both ends can be maintained at all times.

As described above, the servo valve-controlled valve driving device according to the present invention is changed to a link coupling structure through the drive link 320 and the rotary link 330 by breaking away from the gear coupling structure of the conventional drive unit 300, When controlling the angle of the valve shaft 410 of 400, it is possible to minimize an error.

In addition, when the drive link 320 is structured as a pair of upper drive links 321 and lower drive links 322 and then completely open the rotary open/close type valve 400 through the stopper bolt 323, the valve shaft 410 ) There is an effect that can more precisely control the rotation angle of the rotation link 330 to rotate.

In addition, a long-shaped angle adjustment hole 324 is formed through the driving link 320, and a stopper bolt 323 moving along the length direction of the angle adjustment hole 324 and the stopper bolt 323 are fixed in position. There is an effect of being able to conveniently adjust the angle from the closed state of the rotary opening/closing valve 400 to fully open through the stopper nut 325 without replacement of the driving unit 300, and the stopper bolt 323 and the stopper nut 325 By forming a serration (S) on the bolt washers 323c and nut washers 325a formed integrally with each other, a more robust stopper bolt 323 may be fixed in position.

Embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those of ordinary skill in the technical field of the present invention can improve and change the technical idea of the present invention in various forms. Therefore, such improvements and changes will fall within the scope of the present invention as long as it is apparent to those of ordinary skill in the art.

100: servo valve
200: hydraulic cylinder 210: cylinder rod
300: drive 310: drive box
320: drive link
321: upper driving link 322: lower driving link
323: stopper bolt 323a: bolt body
323b: bolt head 323c: bolt washer
324: angle adjustment hole
325: stopper nut 325a: nut washer
326: gap maintaining member
330: rotation link 340: drive cover
400: rotary opening and closing valve 410: valve shaft
S: Serration

Claims (6)

A servo valve-controlled valve driving device that performs a linear motion while the cylinder rod of a hydraulic cylinder moves back and forth under the control of a servo valve, and converts the linear motion of the cylinder rod into a rotary motion by receiving the linear motion of the cylinder rod to rotate the valve shaft of the rotary open/close type valve. In,
The driving unit,
It is installed between the hydraulic cylinder and the rotary open/close type valve in the shape of a box with an open top, and is installed so that the end of the cylinder rod of the hydraulic cylinder is penetrated to the inside, and the valve shaft of the rotary open/close type valve is on the lower surface. A drive box installed to penetrate and protrude upward, a drive link having one end pin-jointed to the end of the cylinder rod, and one end being pin-jointed to the other end of the drive link, and the other end is fixedly coupled to rotate with the valve shaft. It includes a rotating link and a drive cover for closing the open upper portion of the drive box,
The driving link,
It includes a pair of upper driving link and lower driving link arranged in parallel so as to face each other vertically, with the cylinder rod and the rotation link pin-joined at both ends, respectively,
The driving link,
The upper drive link and the lower drive link are vertically coupled between the pin joints at both ends, and when the rotary link rotates according to the withdrawal of the cylinder rod, the upper drive link and the lower drive link are approached to the space between the upper and lower drive links. Further comprising a stopper bolt contacting the side of the rotation link to limit the rotation angle of the rotation link,
The driving link,
A long-shaped angle adjustment hole is formed vertically through each of the upper driving link and the lower driving link along the longitudinal direction between the pin joints at both ends,
The stopper bolt,
It is coupled to be movable along the length direction of the angle adjustment hole of the driving link to adjust the rotation angle of the rotation link,
The driving link,
Further comprising a stopper nut coupled to the stopper bolt to fix the position of the stopper bolt in the angle adjustment hole,
The driving link,
Servo valve control type, characterized in that it is inserted into the bolt body of the stopper bolt so as to be positioned between the upper driving link and the lower driving link, and further comprising a gap maintaining member for maintaining a gap between the upper driving link and the lower driving link. Valve drive device.
delete delete delete The method of claim 1,
The stopper bolt,
It is a flange bolt integrally equipped with a bolt washer with serrations formed between the bolt body and bolt head,
The stopper nut,
Servo valve control type valve driving device, characterized in that the flange nut is integrally provided with a nut washer with serrations formed on the surface facing the bolt washer of the stopper bolt. delete

Images