KR20110113027A - Rotary actuator for torsional strength testing machine - Google Patents

Rotary actuator for torsional strength testing machine Download PDF

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Publication number
KR20110113027A
KR20110113027A KR1020100032340A KR20100032340A KR20110113027A KR 20110113027 A KR20110113027 A KR 20110113027A KR 1020100032340 A KR1020100032340 A KR 1020100032340A KR 20100032340 A KR20100032340 A KR 20100032340A KR 20110113027 A KR20110113027 A KR 20110113027A
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KR
South Korea
Prior art keywords
sealing
rotary actuator
output shaft
vane
rotor housing
Prior art date
Application number
KR1020100032340A
Other languages
Korean (ko)
Inventor
손광선
Original Assignee
(주)제이.케이.에스
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Application filed by (주)제이.케이.에스 filed Critical (주)제이.케이.에스
Priority to KR1020100032340A priority Critical patent/KR20110113027A/en
Publication of KR20110113027A publication Critical patent/KR20110113027A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058—Rotary output members
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The present invention relates to a rotary actuator for a torsional fatigue tester, and more particularly, to a rotary actuator for a torsional fatigue tester using an operating fluid introduced into the actuator to improve the internal tightness of the actuator.
To this end, in the present invention, in the rotary actuator having an output shaft having a pair of vanes on the inside of the rotor housing having a pair of vanes on the inside, the rotor housing has a pair of vanes of the output shaft or the rotor housing. Sealing means for hermetically sealing the sealing surface of the inside of the rotor housing or the outside of the output shaft by using a working fluid introduced into the inside.
As a result, the sealing means uses internal pilot pressure while obtaining the high volumetric efficiency and mechanical efficiency obtained by maintaining the airtightness of the inflow space as the sealing means, and thus the configuration is simple and the manufacturing cost is low.

Description

Rotary Actuator for torsional Strength testing machine

The present invention relates to a rotary actuator, and more particularly, to a rotary actuator for a torsion fatigue tester, which makes it possible to precisely control the rotation of the output shaft by using a working fluid introduced into the actuator.

In general, torsion fatigue tester is applied to torsional materials such as the shear modulus of elasticity, shear yield point, torsional shear strength, relationship between shear stress and shear strain by applying torsional moments to shafts, real objects, and models with various shapes. It is a tester to find out the nature of the test.

Actuators used in such torsional fatigue testing machines must be precisely controlled to allow the test to be performed under the correct conditions while having a large torque to apply the torsional moment to the various specimens within a given time.

 As an actuator for achieving such a performance, the "torsion fatigue tester actuator" (Registration No. 865909), which the applicant has first applied for a patent application, as shown in Figure 10a and 10b, the operating chamber 111 therein Rotor housing (1) comprising an output shaft (2) including the rotor 21 is provided in the operating chamber 111, both rotor vanes 211 is provided on the circumference, and the fluid to be moved to the operating chamber In the rotary actuator for torsion fatigue tester composed of the operating means for rotating the output shaft, the sealing vane (4) which is provided to be movable outward in the insertion groove (5) formed in the middle of both rotor vanes (211), An actuator for a torsion fatigue tester is described which consists of auxiliary actuating means 6 for moving each sealing vane 4 outward through a fluid supply.

At this time, the auxiliary operating means (hereinafter referred to as "fluid supply device") is to be recessed while having a fluid inlet space portion inside the protruding guide stand 611 and each sealing vane 4 protruding in each insertion groove (5). A guide portion 61 formed of a recessed guide groove 612 inserted into the protruding guide stand 611 and the front and rear covers 12 of the operation chamber 111 so as to communicate with the outside to supply fluid. The fluid hole 62, the side hydrostatic bearing chamber 63 formed to recess the circumference of both sides of the rotation shaft 21, the two side hydrostatic bearing chamber 63 and the fluid inlet space 613 is provided in communication with And a fluid supply passage 64.

As a result, the circumference of the rotary shaft and the inner surface of the circumference of the operating chamber are brought into close contact with each other during the operation of the actuator, thereby increasing the volumetric efficiency and the mechanical efficiency during the rotation of the rotor, and of course, the efficiency can be maximized. It has the effect of ensuring sufficient stability of the device by preventing direct wear of the outer periphery and the inner peripheral surface of the operating chamber in advance.

However, since a separate external pilot type fluid supply device must be provided to operate the sealing vane, the structure of the rotary actuator is complicated, and a separate control device for supplying fluid to the fluid supply device according to the rotation of the output shaft is provided. There is a necessary disadvantage.

In addition, the fluid supply device has a complicated flow path by using an external pilot method, and the lower shape of each sealing vane also has a complicated shape, which makes machining difficult and increases manufacturing costs.

In addition, in order to prevent the inner wall of the rotor housing from frictional wear as the inner wall of the rotor housing adheres to the inner wall of the rotor housing due to excessive pressurization during operation of the sealing vane, the ratio of the hydraulic force acting area between the upper and lower portions of the sealing vane should be considered. As shown, the lower shape of the single sealing vane and the internal shape of the insertion groove had to be complicated.

As a result, there is a problem in that an effort and a cost are required to process a complicated flow path and a sealing vane by an external pilot method.

The present invention has been made to solve the above-described problem, the embodiment of the present invention in the airtight working fluid flowing into the rotor housing and the output shaft, to use the hydraulic pressure of the working fluid to operate the output shaft without a separate fluid supply There is a purpose.

In addition, by simplifying the configuration, the processing of each part is easy, and the manufacturing cost is low, the purpose is to increase the economics.

More specifically, since the inflow and outflow directions of the working fluid are different from each other in accordance with the rotational direction of the output shaft, there is an object of providing a sealing vane for selectively hermetically sealing a portion requiring airtightness in accordance with the rotational direction of the output shaft.

On the other hand, the sealing vanes operated by the inflow of the working fluid has an object to be operated at an appropriate pressing force for minimizing the wear caused by the friction.

In addition, it has the purpose of making it possible to manufacture by varying the position of forming the sealing means in accordance with the capacity of the actuator.

In order to solve the above problems, the present invention is a rotary actuator having an output shaft having a pair of vanes formed on the outside in the rotor housing having a pair of vanes formed on the inside, the output shaft or the rotor housing The pair of vanes presents a rotary actuator for a torsion fatigue tester, characterized in that a sealing means for hermetically sealing the sealing surface inside the rotor housing or the outside of the output shaft using a working fluid for operating the output shaft is provided.

In addition, the sealing means includes a sealing operation portion provided in each of the vanes forming a pair, the sealing operation portion is a pair of insertion grooves opened toward the sealing surface, respectively inserted into the insertion groove, the operation Torsional fatigue characterized in that it is provided with a sealing vane alternately lifted by the fluid in accordance with the rotational direction of the output shaft and a fluid supply flow path for distributing the working fluid to the insertion groove so that the sealing vane is lifted alternately Present a rotary actuator for the tester.

In addition, the lower portion of the insertion groove provides a rotary actuator for a torsion fatigue tester, characterized in that it is formed in an arc surface so that the working fluid passing through the fluid supply passage quickly enters.

In addition, the operating area of the upper portion of the sealing vane proposes a rotary actuator for a torsion fatigue tester, characterized in that it is formed smaller than the operating area of the lower.

The upper portion of the sealing vane is made of an inclined surface having a flat portion forming a rounded arc portion or an angled corner portion in contact with the sealing surface, the lower portion presents a rotary actuator for a torsion fatigue tester, characterized in that the flat surface. do.

In addition, the upper portion of the sealing vane inserted into the insertion groove of the output shaft provides a rotary actuator for a torsion fatigue tester, characterized in that consisting of an inclined surface having a convex circularly convex rounded portion to be interviewed with the sealing surface inside the rotor housing. .

In addition, the upper portion of the sealing vane inserted into the insertion groove of the rotor housing proposes a rotary actuator for a torsion fatigue tester, characterized in that consisting of an inclined surface having a concave circular arc concave rounded so as to interview the sealing surface on the outside of the output shaft. .

The present invention has been made to solve the above-described problem, the embodiment of the present invention in the airtight space by operating the sealing vane, the operation of the sealing vane in the conventional pilot method using the working fluid to operate the output shaft As the fluid supply device having a complicated flow path and a separate control device for controlling the fluid supply device become unnecessary, the structure is simplified.

In addition, as a simple structure, the processing of each part is easy, and accordingly the manufacturing cost is also reduced.

Specifically, the vane is provided with a pair of sealing vanes that are alternately operated according to the rotational direction of the output shaft, so that the inflow space is selectively hermetically sealed according to the forward and reverse rotation of the output shaft.

On the other hand, since the working area of the upper part of the sealing vane is formed to be slightly smaller than the lower working area, the sealing vane is pressurized by the inflow of the working fluid so that the sealing vane is obtained by sealing the inflow space of the sealing vane of the prior art. While operating to close the inflow space with efficiency, it has an excessive pressing force to reduce the loss and wear caused by friction between the sealing vane and the sealing surface.

In addition, since the insertion groove and the sealing vane may be selectively provided in the rotor vane or the rotor housing vane or may be provided in both the rotor vane or the rotor housing vane, the formation of the insertion groove and the sealing vane according to the capacity of the rotary actuator for a torsion fatigue tester. Has the effect that can be produced by changing the position.

1 is an exploded perspective view of a rotary actuator for a torsion fatigue tester according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing main parts of a rotary actuator for a torsional fatigue tester shown in FIG. 1. FIG.
FIG. 3 is a partial perspective view schematically showing an insertion groove and a sealing vane employed in the rotary actuator for a torsion fatigue test machine shown in FIG. 1.
4 is a partial perspective view schematically showing an insertion groove and a sealing vane employed in the rotary actuator for a torsional fatigue tester shown in FIG.
5A is a cross-sectional view of the sealing vane employed in the rotary actuator for torsion fatigue tester shown in FIG. 1.
FIG. 5B is a cross-sectional view of another sealing vane employed in the rotary actuator for torsion fatigue tester shown in FIG. 1. FIG.
5C is a cross-sectional view of another sealing vane employed in the rotary actuator for torsion fatigue tester shown in FIG.
6 is a cross-sectional view showing main parts of a rotary actuator for a torsion fatigue tester according to a second embodiment of the present invention.
FIG. 7 is a partial perspective view schematically illustrating an insertion groove and a sealing vane employed in the rotary actuator for a torsion fatigue tester illustrated in FIG. 6.
FIG. 8 is a cross-sectional view of another sealing vane employed in the rotary actuator for a torsion fatigue test machine shown in FIG. 6. FIG.
9 is a cross-sectional view showing the main parts of a rotary actuator for a torsion fatigue test machine according to a third embodiment of the present invention.
10A is a perspective view showing a conventional rotary actuator for torsion fatigue test.
Fig. 10B is a partial perspective view showing the main portion of a conventional rotary actuator for torsion fatigue test.

Hereinafter, through the preferred embodiment of the accompanying drawings, the function, configuration and operation of the rotary actuator for a torsion fatigue tester of the present invention will be described in detail.

However, hereinafter, reference numerals for components having the same function are used uniformly.

In addition, the description of the configuration and operation other than the part described in this specification is in accordance with the contents described in the patent application No. 865909, "actuator for torsion fatigue tester" filed earlier by the applicant.

1 is an exploded perspective view of a rotary actuator for a torsion fatigue tester according to a first embodiment of the present invention. only. Reference numeral h denotes a drain port.

The rotary actuator for a torsion fatigue tester according to the embodiment of the present invention includes an output shaft 120 having a pair of vanes B formed on the outside of the rotor housing 110 having a pair of vanes B formed on the inside thereof. In the rotary actuator, a pair of vanes (B) of the output shaft 120 or the rotor housing 110 using a working fluid introduced into the rotor housing 110 inside the rotor housing 110 or the output shaft 120 The sealing means 1 which seals the sealing surface S of the outer side of this is provided.

At this time, the rotor housing 110 has a body 111 is formed with a working chamber (111a) including a pair of vanes (B) formed to protrude inward, and the cover (front and rear of the body 111) ( 112 is integrally formed of a plurality of bolts and nuts, and the operating chamber 111a of the rotor housing includes an output shaft 120 provided with both vanes B opposed to an outer circumference and penetrating the cover. In addition, one side of the rotor housing is provided with an operating means 130 (see Fig. 2) for forward and reverse rotation of the output shaft by the supply of the working fluid.

The operation means 130 is a fluid hole 131 (see Fig. 2) provided on both sides of one of the vanes provided in the rotor housing 110 and the amount penetrating in a diagonal direction to each other inside the output shaft 120 Inclined flow path 132 (see FIG. 2).

At this time, the pair of vanes provided on the outer side of the output shaft is interviewed or in contact with the sealing surface inside the rotor housing, the pair of vanes provided on the inner side of the rotor housing is interviewed or in contact with the sealing surface outside the output shaft. The operation chamber is divided into an inflow space 111b through which the working fluid is introduced.

That is, the rotating shaft is rotated in the forward and reverse directions through a process in which the working fluid is alternately supplied and discharged through both the fluid holes provided in the upper portion of the rotor housing operating chamber and both inclined flow paths inside the rotating shaft.

Figure 2 is a cross-sectional view showing the main portion of the rotary actuator for a torsion fatigue test machine shown in Figure 1, Figures 3 and 4 schematically shows the insertion groove and the sealing vane employed in the rotary actuator for a torsion fatigue tester shown in FIG. A partial perspective view and a partial perspective view.

The torsional fatigue tester rotary actuator 100 according to the first embodiment of the present invention is a pair of vanes (B) provided on the outer side of the output shaft 120 to seal the working fluid introduced into the sealing means (1) Is provided.

More specifically, each vane (B) provided on the outside of the output shaft 120 includes a sealing operation portion 10, the sealing operation portion 10 is opened toward the sealing surface (S) of the rotor housing 110. A pair of insertion grooves 11 and a sealing vane 12 and an insertion groove 11 which are alternately elevated according to the rotational direction of the output shaft to the insertion grooves and the inflow space in which the working fluid is filled A fluid supply passage 13 through which the working fluid is circulated is communicated with the 111b.

More specifically, each insertion groove 11 is formed in pairs spaced apart from the outer surface of each vane (B) provided on the outside of the output shaft 120, each insertion groove 11 is introduced into the operating chamber inside A sealing vane 12 is provided to be lifted and lowered toward the sealing surface S of the rotor housing 110 by using the working fluid.

As a result, the working fluid introduced into either of the inflow spaces of the working fluids formed as the left and right spaces of the rotor housing does not flow out to the other inflow space, thereby increasing the volumetric efficiency and mechanical efficiency, and rotating the output shaft. This can be precisely controlled. In addition, even if the end of the sealing vane and the inner wall of the rotor housing due to long use, the sealing vane is protruded to the outside by the worn depth to maintain a constant airtight effect.

At this time, the fluid supply passage 13 is formed in communication with the insertion groove 11 and the inflow space 111b into which the working fluid is introduced, so that the introduced working fluid can flow into the lower portion of the sealing vane.

On the other hand, the insertion groove 11 may have a fluid space portion (11a) which is a space in communication with the fluid supply passage so that the working fluid flowing from the side can stay. That is, the sealing vane 12 is provided with the fluid space portion 11a in the insertion groove 11 to be elevated, and the inflow space 111b into which the fluid space portion 11a and the working fluid flows into one side of the fluid space portion. The fluid supply passage 13 is formed to communicate with.

Thus, the working fluid supplied to the fluid space is introduced into the fluid space through the fluid supply passage, and when the internal pressure of the fluid space increases, the sealing vane rises outwardly of the insertion groove, that is, outward of each vane of the output shaft, so that the rotor housing The working fluid is hermetically sealed by pressurizing the sealing surface. In this case, as shown in FIG. 3, the fluid supply passage may be formed of a plurality of through holes or may have a long hole cross section.

On the other hand, the lower portion of the insertion groove 11 is preferably formed with an arc surface (11b) so that the working fluid passing through the fluid supply passage 13 is introduced quickly. By forming the circular arc surface, the working fluid introduced into the fluid supply passage flows through the circular arc surface, and can be quickly introduced into the fluid space described later. Therefore, as soon as the working fluid is introduced, the sealing vane can be immediately raised, thereby enabling accurate operation control.

In addition, the fluid supply passage 13 communicating with the insertion groove or the fluid space portion is formed in the opposite direction so as to communicate with the different inflow space 111b in each insertion groove 11 so that the sealing vanes are alternate with each other according to the rotation direction. Will work.

That is, each of the inflow space (111b) and the sealing operation unit 10 is divided by a pair of vanes provided in the rotor housing 111 and a pair of vanes provided in the output shaft 120, so that each The sealing vane communicates with the sealing surface of the rotor housing by raising the sealing vane in communication with the inflow space where the working fluid is supplied to increase the internal pressure, and the sealing vane communicating with the other inflow space where the working fluid flows out to lower the internal pressure. Will not work.

As a result, the sealing vanes connected to the inflow space to which the working fluid is supplied are selectively operated among the sealing vanes provided in pairs according to the forward rotation direction or the reverse rotation direction of the output shaft.

5A is a cross-sectional view of a sealing vane employed in the rotary actuator for a torsion fatigue test machine shown in FIG. 1, and FIG. 5B is a cross-sectional view of a sealing vane according to another embodiment.

The working area S1 of the upper part of the sealing vane 12 employed in the first embodiment and the first and second embodiments described later is formed smaller than the lower working area S2, and the working fluid flows in. The furnace sealing vanes are configured to pressurize the sealing surface with an appropriate pressing force.

This allows the sealing vane to adjust the pressing force of the lower end face which is pressurized through the working fluid filled in the fluid space and the pressing force of the inclined surface of the upper end which is pressurized between the sealing surface of the vane and the rotor housing. In order to prevent the sealing vane from being elevated and airtight while being excessively pressurized to increase the friction between the sealing vane and the sealing surface, thereby reducing wear and operating efficiency.

That is, the pressing force acting on the lower part of the sealing vane is formed to be smaller than the lower acting area of the lower part so that the pressing force acting on the sealing vane is equal to or larger than the pressing force acting on the upper part.

On the other hand, in order to reduce the contact area with the sealing surface (S) while the working area (S1) of the upper part of the sealing vanes as smaller than the working area (S2) as described above, the lower part of each sealing vane 12 is a flat surface It consists of (12c), the upper portion has an inclined surface 12a toward the inlet space to which the working fluid is supplied. That is, the inclined surfaces of the sealing vanes inserted into the pair of insertion grooves are provided in a direction of directly looking at the inflow space communicated with the insertion grooves, and the sealing vanes are symmetrical to each other.

In addition, the upper portion of the inclined surface 12a, that is, the sealing surface and the closing portion is formed of a rounded arc portion 12c or a flat portion 12d forming an angled edge, thereby reducing the contact area with the sealing surface, It is formed so that the working area is smaller than the surface.

As a result, the pressing force for the working fluid filled in the fluid space through the fluid supply passage to press the lower flat surface is greater than the pressing force for the working fluid flowing between the rotor housing inner sealing surface and the vane gap to press the upper inclined surface of the sealing vane. As a result of the inflow of the working fluid, the sealing vane is lifted from the insertion groove so that the upper end of the sealing vane can press the sealing surface of the rotor housing.

Due to the inclined surface and the arc portion, the shape of the sealing vane may press the sealing surface according to the inflow of the working fluid even though the shape of the sealing vane is not formed according to the complicated shape of the prior art, thereby simplifying the overall configuration.

On the other hand, Figure 5c is a cross-sectional view of another sealing vane employed in the rotary actuator for the torsion fatigue tester shown in FIG.

An upper portion of the sealing vane 12 inserted into the insertion groove 11 of the output shaft 120 is an inclined surface having a convex arc portion 12e that is convexly rounded to interview the sealing surface S inside the rotor housing 110. Can be done.

That is, the sealing surface S inside the rotor housing 110 has a concave shape when viewed from the center of the output shaft 120, so that the convex arcs convexly rounded to the sealing vane 12 in contact with the concave sealing surface. It will be equipped to interview. At this time, the radius of curvature of the convex arc portion is determined according to the inner diameter of the sealing surface inside the rotor housing.

In this case, the sealing vane rises and the sealing surface of the rotor housing is interviewed, so that the airtightness of the working fluid is more reliably obtained. In addition, since the contact area between the sealing vane and the sealing surface becomes wider, wear is also reduced.

On the other hand, Figure 6 is a cross-sectional view showing the main portion of the rotary actuator for a torsion fatigue tester according to a second embodiment of the present invention, Figure 7 is an insertion groove and a sealing vane employed in the rotary actuator for a torsion fatigue tester shown in FIG. It is a schematic partial perspective view.

The torsion fatigue tester rotary actuator 100 ′ according to the second preferred embodiment of the present invention is provided in a pair of vanes B in which the sealing means 1 is provided inside the rotor housing 110.

More specifically, each vane (B) provided on the inside of the rotor housing 110 includes a sealing operation portion 10, the sealing operation portion 10 toward the sealing surface (S) of the output shaft 120. A pair of opening grooves 11 and a sealing vane 12 and a fluid space portion 11a which have a fluid space portion 11a in the insertion groove 11 and which are alternately elevated according to the rotational direction of the output shaft. The inflow space 111b provided inside the rotor housing to fill the working fluid communicates with the fluid supply passage 13 through which the working fluid flows.

In addition, the fluid supply passage 13 is formed as a different inlet space (111b) in each insertion groove 11, the sealing vane is operated by alternately raising and lowering in accordance with the rotation direction of the output shaft.

Except for the detailed functions, configurations, and actions of the sealing operation unit and the sealing vane to be described below are the same as described above, duplicated description is omitted.

At this time, the sealing vane 12 is inserted into the insertion groove 11 of the rotor housing 110, as described above, the sealing surface and the closing portion is formed of a rounded arc portion or a flat portion forming an angled corner is used. Can be.

Meanwhile, as shown in FIG. 8, the upper portion of the sealing vane 12 is an inclined surface 12a having a concave circular arc portion 12f that is concave round so as to contact the convex sealing surface S outside the output shaft 120. Can be done.

In this case, the raised sealing vane and the sealing surface of the output shaft are interviewed with each other to ensure the airtightness of the fluid more securely, and the contact area becomes wider, thereby reducing wear.

On the other hand, Figure 9 is a cross-sectional view showing the main portion of the rotary actuator for a torsion fatigue tester according to a third embodiment of the present invention.

The rotary actuator 100 ″ for the torsion fatigue tester according to the third preferred embodiment of the present invention includes a pair of vanes B and the rotor housing 110 in which the sealing means 1 is provided on the outer side of the output shaft 120. It is provided in all the pair of vanes B provided in the inside of the.

More specifically, the sealing means 1 includes a sealing operation part 10 formed on each vane B of the output shaft 120 and the rotor housing 110, and the sealing operation part 10 includes the above-mentioned agent. In accordance with the first and second embodiments, an insertion groove 11, a sealing vane 12, and a fluid supply passage 13 are provided.

Thus, when the working fluid is moved to the fluid supply passage communicating with each inflow space to which the working fluid for forward rotation of the output shaft is supplied and the fluid space is filled, the working fluid among the sealing vanes provided in the pair of vanes formed on the output shaft The sealing vane of the filling inflow space is in contact with the sealing surface of the rotor housing, and the sealing vane provided in the pair of vanes formed in the rotor housing is in contact with the sealing surface of the output shaft, thereby sealing the inflow space in which the working fluid is filled. .

On the other hand, when the working fluid flows into the inflow space different from the above-mentioned inflow space to reverse the output shaft, the sealing vane is in contact with each sealing surface than when the forward rotation, the air inflow space into which the working fluid flows is airtight .

As a result, the working fluid flowing in the forward or reverse rotation of the output shaft is sealed by the sealing vanes alternately operated at each vane, so that the outflow of the working fluid is significantly reduced, so that the torque efficiency and the precision of the control of the output shaft are first. This is greatly improved compared to the second embodiment.

Hereinafter, since the functions, configuration and operation of the sealing operation part and the sealing vane are the same as described above, duplicated descriptions are omitted.

As described above, in the present invention, the third embodiment has better performance than the first and second embodiments in terms of hermetic performance, but the first and second embodiments do not have sealing means for some vanes, which is more inexpensive. Therefore, the user can select and execute any one of the first to third embodiments according to the capacity of the torsion test rotary actuator.

100,100 ′, 100 ″: Actuator 110: Rotor housing
111: body 112: cover
111a: operating room 111b: inlet space
120: output shaft 130: operating means
131: fluid hole 132: inclined flow path
1: sealing means 10: sealing operation part
11: insertion groove 11a: fluid space
11b: arc surface
12: sealing vane 12a: inclined surface
12b: bottom surface 12c: arc portion
12d: flat part 12e: convex arc part
12f: concave arc 13: fluid supply passage
B: vane S: sealing surface

Claims (7)

In a rotary actuator provided with an output shaft 120 having a pair of vanes B formed on the outside of the rotor housing 110 having a pair of vanes B formed therein,
A pair of vanes (B) of the output shaft 120 or the rotor housing 110 may be formed inside the rotor housing 110 or outside the output shaft 120 by using a working fluid for operating the output shaft 120. Rotary actuator for a torsion fatigue tester, characterized in that a sealing means (1) for hermetically sealing the sealing surface (S). In claim 1,
The sealing means 1 includes a sealing operation portion 10 provided in each of the vanes (B) forming a pair,
The sealing operation portion 10
A pair of insertion grooves 11 opened toward the sealing surface S,
Sealing vanes 12 inserted into the insertion grooves 11 and alternately lifted by the working fluid according to the rotational direction of the output shaft 120;
Rotary actuator for a torsion fatigue tester, characterized in that the fluid supply passage 13 is formed to distribute the working fluid to the insertion groove (11) so that the sealing vane (12) is alternately elevated. In claim 2
The lower portion of the insertion groove 11 is a rotary actuator for a torsion fatigue tester, characterized in that formed in the circular arc surface (11b) so that the working fluid passing through the fluid supply passage (13) quickly enters. In claim 2,
The working area (S1) of the upper portion of the sealing vane 12 is smaller than the lower working area (S2) of the rotary actuator for torsion fatigue tester. In claim 4,
An upper portion of the sealing vane 12 is formed of an inclined surface 12a having a rounded arc portion 12c having a rounded arc portion 12c or a planar portion 12d forming an angled corner, the lower portion of which is in contact with the sealing surface S. A rotary actuator for a torsion fatigue tester, comprising a face (12b). In claim 4,
The upper portion of the sealing vane 12 is inserted into the insertion groove 11 of the output shaft 120,
Rotary actuator for a torsion fatigue tester, characterized in that it comprises an inclined surface (12a) having a convex circular arc portion (12e) convexly rounded to interview the sealing surface (S) inside the rotor housing (110). In claim 4,
The upper portion of the sealing vane 12 is inserted into the insertion groove 11 of the rotor housing 110,
Rotary actuator for a torsion fatigue tester, characterized in that the inclined surface having a concave arc portion (12f) rounded concave so as to contact the sealing surface (S) outside the output shaft (120).
KR1020100032340A 2010-04-08 2010-04-08 Rotary actuator for torsional strength testing machine KR20110113027A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101585073B1 (en) * 2015-06-15 2016-01-25 엘아이지넥스원 주식회사 hydraulic actuator
KR20160020884A (en) * 2014-08-14 2016-02-24 (주)케이엔알시스템 Hydraulic rotary actuator
CN115402530A (en) * 2022-09-02 2022-11-29 中国空空导弹研究院 Steering engine torque testing platform

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160020884A (en) * 2014-08-14 2016-02-24 (주)케이엔알시스템 Hydraulic rotary actuator
US9782894B2 (en) 2014-08-14 2017-10-10 Knr Systems Inc. Hydraulic rotary actuator
KR101585073B1 (en) * 2015-06-15 2016-01-25 엘아이지넥스원 주식회사 hydraulic actuator
CN115402530A (en) * 2022-09-02 2022-11-29 中国空空导弹研究院 Steering engine torque testing platform

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