JP5388185B2 - Vibration isolator test equipment - Google Patents

Description

  The present invention relates to a portable test apparatus used for an operation test of a mechanical vibration isolator interposed between a pipe and a structure in a power plant or a chemical plant.

  The first and second support members that are relatively stretchably coupled are connected to the support body and the supported body, respectively, and the first support member and the second support member extend and contract at low acceleration in the axial direction. There is an anti-vibration device that allows high-acceleration and expansion / contraction displacement. Conventionally, Patent Document 1 discloses a test apparatus for inspecting an appropriate vibration isolating operation of this type of vibration isolator to confirm performance. This test apparatus is mounted between the first support member and the second support member, and reciprocates one of the support members to drive the vibration isolator to extend and contract. The test apparatus includes a case that is detachably fixed to the side of the large diameter portion of the first support member of the vibration isolator via an attachment member. The mounting member is a block fixed to the outer surface of the case, a pair of opposing pressing plates that sandwich the large diameter portion of the support member from both ends in the axial direction, and the block and both pressing plates to penetrate both pressing plates. And a nut screwed onto the bolt. In the case, a rotary shaft is rotatably supported in parallel with the axis of the first and second support members, a shaft of a motor with an encoder is coupled to the end thereof, and a nut body is screwed on the rotary shaft. Then, a sliding rod that is movable in the axial direction is fixed to the nut body, and the second support member of the vibration isolator is connected to the sliding rod through a load cell. A puller coupled to the load cell is coupled to the second support member of the side vibration isolator via a connection fitting extending in the lateral direction.

JP-A-6-94582

The conventional test apparatus is connected in parallel to the vibration isolator to be tested, and since the axis of the vibration isolator and the driving direction of the test apparatus do not match, a bending moment is generated in the vibration isolator, It is difficult to obtain accurate values for tensile and compressive loads.
Therefore, an object of the present invention is to provide a test apparatus that improves the accuracy of the test by making the operation directions of the expansion and contraction motion of the vibration isolator and the expansion and contraction drive of the test apparatus coincide with each other.

In the present invention, in order to solve the above-described problem, the test apparatus 1 used in the vibration isolator S includes a motor with an encoder 12 that rotates a screwed rotary shaft 13 rotatably installed in a case 10. 11 is coupled to the threaded portion of the rotating shaft 13, one end is coupled to the nut body 14, and the other end is coupled to the outside of the case 10 via the load cell 16. A main body 7 detachably connected to the second support member S2 of S, and a vibration isolator mounting portion 2b to which the vibration isolator S is detachably fixed at one end, and the other end The main body mounting portion 2a for fixing the main body 7 by aligning the axis of the rotary shaft 13 with the direction of expansion and contraction of the vibration isolator S, and the frame 2 for arranging the vibration isolator S and the main body in series are provided. The load cell 16 was placed on the same axis as the expansion and contraction motion of the vibration isolator S.
In order to adjust the connection position of the vibration isolator S attached to the vibration isolator mounting portion 2b with the second support member S2, a plurality of adjustment holes 3a through which the bolts 8a for fixing the main body 7 to the main body mounting portion 2a are inserted. Are arranged side by side in the expansion / contraction direction of the vibration isolator S.
The vibration isolator mounting portion 2 b has one end of four threaded support rods 20 extending in the expansion and contraction direction of the vibration isolator S so as to surround the first support member S 1 of the vibration isolator S on the frame 2. The first holding piece 19 is fixed to the frame base 2 and one end of the large-diameter portion of the first support member S1 of the vibration isolator S is received, and the second holding piece 21 through which the support bar 20 passes is provided. The other end of the large-diameter portion of the first support member S1 of the vibration isolator S is fixed by a locking nut 23 that is screwed into the screw portion of the support rod 20.
A long hole that is provided with a frame piece 18 on the frame base 2 and moves the support bars 20 in the lateral direction in order to change the mutual spacing of the support bars 20 according to the diameter of the first support member S1 of the vibration isolator S. 18a was provided.
A jig 24 with an opening that allows the second support member S2 of the vibration isolator S to pass through is detachably fixed to the frame piece 18, and one end of the large-diameter portion of the vibration isolator S is fitted into the jig 24 with an opening. In combination, an arcuate recess 24b for positioning the vibration isolator S on a predetermined axis is provided.
Arc-shaped concave portions 19a and 19b for positioning the vibration isolator S on a predetermined axis by fitting one end of the large diameter portion of the first support member S1 of the vibration isolator S to the first clamping piece 19 are provided. .
The arc-shaped recesses 24b, 19a, 19b have a plurality of openings 25a having different diameters that fit around the large diameter portion according to the diameter of the large diameter portion of the first support member S1 of the vibration isolator S. The ring-shaped jig 25 is selectively fitted to position the vibration isolator S on a predetermined axis.
The ring-shaped jig 26 is provided with an arc-shaped bar 26b that receives one end surface of the large-diameter portion of the vibration isolator S.

  In the present invention, since the vibration isolator is connected in series to the vibration isolator to be tested, the expansion motion of the vibration isolator, the expansion and contraction drive of the test apparatus, and the load cell coincide with each other on the coaxial line. Does not occur, and the tensile and compressive load can be accurately measured.

1 is a plan view of a test apparatus according to the present invention. It is a front view of a main body. It is the III-III sectional view taken on the line of FIG. It is a longitudinal cross-sectional view of a main body. It is a perspective view of a vibration isolator attachment part. It is a cross-sectional view of a ring-shaped jig.

An embodiment of the present invention will be described with reference to the drawings.
1 and 2, the vibration isolator S to be tested attached to the test apparatus 1 includes a first support member S1 and a second support member S2 that can be expanded and contracted by linear relative displacement. One of the support members is connected to a support such as a structure, and the other is connected to a support such as a pipe. The first support member S1 has a known buffering mechanism (not shown) that allows low acceleration relative linear motion in the axial direction of the second support member but suppresses high acceleration linear motion. Built in.

  The test apparatus 1 includes a frame 2 having a main body attachment portion 2a to which a main body unit 5 is attached at one end portion and a vibration isolator attachment portion 2b to which a vibration isolator S is attached at the other end portion. The underframe 2 is configured by connecting one end of a side plate 3 made of a pair of parallel long channel members with a connecting plate 4 and a frame piece 18 described later.

  The main body unit 5 attached to the main body attaching portion 2 a includes a unit frame 6 attached between one end portions of the side plates 3 and 3, and a main body 7 fixed to the unit frame 6. As shown in FIG. 3, the unit frame 6 includes a vertical cross-section bracket 8 fixed to the base frame 2, and a fixed frame 9 that is pivotally attached to the inside of the bracket 8 and fixes the main body 7. . The bracket 8 is fixed to a plurality of adjustment holes 3a provided in the longitudinal direction on the upper surfaces of the side plates 3 and 3 of the main body mounting portion 2a so that the mounting position can be changed by bolts 8a and nuts 8b. The fixed frame 9 is formed by connecting side plates 9a and 9a made of a pair of opposed long steel plates, a front plate 9b for connecting between one end portions of the side plates 9a and 9a, and between the other end portions and the intermediate portions of the side plates 9a and 9a. And fitting blocks 9 c and 9 d for fixing the case 10. The fitting blocks 9c and 9d have openings into which the case 10 of the main body 7 is fitted.

  As shown in FIG. 4, a motor 11 with an encoder 12 is fixed in one end of a cylindrical case 10 of the main body 7. A rotating shaft 13 having one end connected to the shaft 11 a of the motor 11 is rotatably supported in the other end portion of the case 10. A nut body 14 is screwed onto the rotary shaft 13. One end of two upper and lower sliding rods 15 that pass through the lid 10 a on the other end side of the case 10 so as to be slidable in the axial direction is fixed to the nut body 14. The nut body 14 is movable in the axial direction in the case 4 together with the sliding rod 15 by the rotation of the rotating shaft 13. The other end of the sliding rod 15 protrudes outside the case 10 and is coupled to the load cell 16. A pull handle 17 connected to the second support member S2 of the vibration isolator S is connected to the load cell 16. When the main unit 5 is fixed to the frame 2, the rotary shaft 13, the load cell 16, and the puller 17 are arranged on the same axis.

  The encoder 12 and the load cell 16 are electrically connected to a control device (not shown). The extension distance and speed between the first support member S1 and the second support member S2 are further extended by the encoder 12 attached to the motor 11, and the stroke end of the extension is further extended by the limit switch 7a attached to the main body. The magnitude of the accompanying load can be detected by the load cell 16, respectively.

  The vibration isolator mounting portion 2 b to which the vibration isolator S is attached terminates the pair of upper and lower frame pieces 18 and 18 fixed between the end portions of the side plates 3 and 3 and the side plates 3 and 3 of the base frame 2. A pair of left and right first clamping pieces 19, four support rods 20 with screws extending in parallel through the frame piece 18 in the longitudinal direction of the frame 2, and the other end portion of the support rod 20 penetrates. A pair of left and right second clamping pieces 21, a locking nut 23 screwed into a threaded portion of the support bar 20, and a binding band 22 wound around the four support bars 20.

  As shown in FIG. 5, the frame piece 18 includes a long hole 18 a that can move the support rod 20 in the lateral direction. The distance between the second sandwiching pieces 21 and 21 expands and contracts when the support bar 20 moves in the long hole 18a, so that the vibration isolator S having various diameters can be arranged inside. The support bar 20 is prevented from being detached from the first clamping piece 19 by a screw head, and the second clamping piece 21 is prevented from coming off by a locking nut 23 to be screwed. A pair of 2nd clamping pieces 21 and 21 are arrange | positioned in the longitudinal direction same position on the support rod 20 so that the end of 1st support member S1 of the vibration isolator S may be received.

  When the diameter of the large-diameter portion of the vibration isolator S is small, the frame piece 18 is fixed to the second holding pieces 21 and 21 by fixing the jig 24 with an opening between the bolts 18b. Can receive the other end of the large diameter portion of the vibration isolator S. The jig 24 with an opening has an opening 24a that penetrates the second support member S2 of the vibration isolator S, and is fitted with one end of the large-diameter portion of the first support member S1 of the vibration isolator S to prevent the vibration. It has an arcuate recess 24b for placing the vibrator S on the axis of the test apparatus body 7.

  The first clamping piece 19 receives the large diameter portion of the vibration isolator S having a larger diameter that cannot be fitted to the frame piece 18. An arcuate recess 19a in which one end of the large-diameter portion of the first support member S1 of the vibration isolator S is fitted to the first clamping piece 19 and the vibration isolator S is disposed on the axis of the test apparatus main body 7. 19b.

  As shown in FIG. 6 (a), when the vibration isolator S having a diameter that does not match these is fixed to the arcuate recesses 24b, 19a, 19b of the jig 24 with opening and the first holding piece 19, the diameter It is possible to fit a ring-shaped jig 25 that arranges the vibration isolator S on the axis of the test apparatus main body 7 while adjusting the above. A plurality of ring-shaped jigs 25 each having circular openings 25a having different diameters according to the large diameter portion are prepared so as to fit around the large diameter portion of the vibration isolator S. Accordingly, when the ring-shaped jig 25 having the same diameter is fitted into the arc-shaped recesses 24b, 19a, 19b and the large-diameter portion of the vibration isolator S is fitted, the vibration isolator S is attached to the shaft of the test apparatus main body 7. Can be placed on the line.

  When the large-diameter portion of the vibration isolator S is fitted to the arc-shaped concave portions 24b, 19a, 19b via the ring-shaped jig 25, the end face of the large-diameter portion is received by the jig 24 with the opening or the first holding piece 19. However, when the contact surface of the jig 24 with the opening or the first holding piece 19 is narrow, as shown in FIG. 6B, it is fitted to the end of the large diameter portion of the vibration isolator S. A ring-shaped jig 26 is used. The ring-shaped jig 26 has a ring portion 26b having an opening 26a that fits around the end of the large-diameter portion of the vibration isolator S, and an end surface of the large-diameter portion of the vibration isolator S that protrudes in the radial direction. And an arcuate flange 26c that receives a load in contact therewith.

  This test apparatus 1 is used by fixing the first support member S1 of the vibration isolator S to the vibration isolator mounting portion 2b, and connecting the handle 17 to the second support member S2 of the vibration isolator S. The vibration isolator mounting portion 2 b moves the support rod 20 within the elongated hole 18 a of the frame piece 18, arranges the large diameter portion of the vibration isolator S within the four support rods 20, and surrounds the support rod 20. The binding band 22 is wound and bound, and the large-diameter portion of the vibration isolator S is fitted into the recess 19 a of the first sandwiching piece 19, and the locking nut 23 is tightened to connect the second sandwiching piece 21 and the first sandwiching piece 19. The large-diameter portion of the vibration isolator S is sandwiched and fixed. The vibration isolator S is disposed on the axis of the test apparatus main body 7 if one end of the large diameter portion is fitted into the recess 19 a of the first holding piece 19. When the diameter of the vibration isolator S is smaller, the other concave portion 19b of the first clamping piece 19 is used, or one that matches from a plurality of types of ring-shaped jigs 25 and 26 is selected and the concave portion 19a is selected. , 19b, using a jig 24 with an opening fixed to the frame piece 18, or selecting one that matches from a plurality of types of ring-shaped jigs 25, 26 and fitting it into the recess 24b, The large diameter part of the vibration isolator S is received.

  The main unit 5 has the mounting position of the bracket 8 so that the puller 17 is connected to the second support member S2 pulled out to an approximately middle position of the stroke of the vibration isolator S fixed to the vibration isolator mounting portion 4. It adjusts with the adjustment hole 3a and it fixes with the volt | bolt 8a and the nut 8b.

  In this state, when the motor 11 is rotated forward and backward to rotate the rotating shaft 13, the nut body 14 screwed to the rotating shaft 13 moves relative to the axial direction, and the sliding rod 15 is expanded and contracted with respect to the case 10. . The expansion / contraction speed between the first support member S1 and the second support member S2 is increased by the encoder 12 attached to the motor 11, the expansion / contraction stroke end is further controlled by the limit switch 7a, and the load accompanying the expansion / contraction movement is increased. This is detected by the load cell 16 and recorded and output to an output device (not shown). Since the axes of the main body 7 and the vibration isolator S coincide with each other, and the load cell 16 is positioned on the axis, the load applied to the vibration isolator S can be accurately measured without applying a moment.

  The present invention is a test apparatus in which a load cell is arranged on the axis of expansion and contraction motion of a vibration isolator to increase the measurement accuracy of an operation test.

DESCRIPTION OF SYMBOLS 1 Test apparatus 2a Main body attaching part 2b Vibration isolator attaching part 2 Base frame 3 Side plate 3a Adjustment hole 5 Main body unit 7 Main body 8 Bracket 8a Bolt 8b Nut 10 Case 11 Motor 13 Rotating shaft 14 Nut body 15 Sliding rod 16 Load cell 18 Frame Piece 18a long hole 18b bolt 19 first clamping piece 19a arc-shaped recess 19b arc-shaped recess 20 support rod 21 second clamping piece 23 retaining nut 24 jig 24a with opening 24b arc-shaped recess 25 ring-shaped jig 25a opening 26 ring -Shaped jig 26a Opening 26c Arc-shaped rod S Vibration isolator S1 First support member S2 Second support member

Claims (7)

Test for confirming the operation of a vibration isolator that is connected between a support and a supported body, and controls the expansion and contraction movement in the axial direction according to the relative displacement between the two to allow or suppress the displacement. A device,
A threaded rotating shaft installed rotatably in the case, a motor with an encoder for rotating the rotating shaft, a nut body screwed into the threaded portion of the rotating shaft, and one end coupled to the nut body. A body having an end that is detachably connected to the second support member of the vibration isolator via a load cell outside the case;
A body attachment that has a vibration isolator mounting portion to which the vibration isolator is detachably fixed at one end portion, and that fixes the main body at the other end portion by aligning the axis of the rotating shaft with the expansion and contraction direction of the vibration isolator. It has a part, comprising a base frame placed in series stretch kinematic same axis of vibration isolators via pre SL load cell and a vibration isolators and the body,
The main body attachment portion has a plurality of adjustment holes through which bolts for fixing the main body are inserted in order to adjust the connection position with the second support member of the vibration isolator attached to the vibration isolator attachment portion. A test apparatus for a vibration isolator, which is provided side by side in the expansion and contraction direction of the vibration isolator. The vibration isolator mounting portion has one end fixed to the frame and four threaded support rods extending in the expansion and contraction direction of the vibration isolator so as to surround the first support member of the vibration isolator. ,
A first clamping piece fixed to the underframe and receiving one end of the large diameter portion of the first support member of the vibration isolator;
And a second clamping piece that passes through the support rod and is fixed by a locking nut that is screwed into the threaded portion and receives the other end of the large-diameter portion of the first support member of the vibration isolator. The vibration isolator test device according to claim 1. The frame base includes a frame piece having a long hole that can move the support bars in the lateral direction in order to change the mutual spacing of the support bars in accordance with the diameter of the first support member of the vibration isolator. The vibration isolator testing device according to claim 2. The frame is fitted with one end of the large-diameter portion of the first support member of the vibration isolator, has an arcuate recess for positioning the vibration isolator on a predetermined axis, and passes through the second support member. The vibration isolator testing device according to claim 3, further comprising a jig with an opening which is detachably fixed to the piece. The first holding piece has an arcuate recess that fits to one end of the large-diameter portion of the first support member of the vibration isolator and positions the vibration isolator on a predetermined axis. The vibration isolator test device according to any one of claims 2 to 4. Alternatively fitted into the arcuate recess, and according to the diameter of the large diameter portion of the first support member of the vibration isolator, having openings of different diameters that fit around the large diameter portion; 6. The vibration isolator testing apparatus according to claim 5, further comprising a plurality of ring-shaped jigs for positioning the vibration isolator on a predetermined axis. The vibration isolator testing device according to claim 6, wherein the ring-shaped jig has an arc-shaped flange that receives one end surface of the large-diameter portion of the first support member of the vibration isolator.

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