JP2009243957A - Mounting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce an inspection cost while suppressing large size of a balance inspection device 15 after sufficiently securing inspection precision of high speed balance of a turbocharger 1. <P>SOLUTION: A first holding groove 35 for holding a flange part 19f of an inspection frame 19 and a flange part 3f of a housing 3 from one side is formed at the inside of the intermediate part of a first clamp arm 31. A first slit 37 outside of the intermediate part of the first clamp arm 31 is formed so that it communicates with the first holding groove 35. A second holding groove 47 for holding the flange part 19f of the inspection frame 19 and the flange part 3f of the housing 3 from the other side is formed at the inside of the intermediate part of a second clamp arm 39. A second slit 49 is formed at the outside of the intermediate part of the second clamp arm 39 so that it communicates with a second holding groove 47. A tightening member 51 is provided, which tightens the edge part of the first clamp arm 31 and the edge part of the second clamp arm 39. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a mounting jig used when a housing of a rotary machine is attached to an inspection frame of a balance inspection device that inspects a high-speed balance of a rotary machine such as a turbocharger.

  In the production site of a turbocharger (an example of a rotating machine), usually, before shipping the turbocharger, a high-speed balance of the turbocharger is inspected by rotating the rotor of the turbocharger at a high speed using a balance inspection device. It has been broken. The configuration of the balance inspection apparatus will be briefly described as follows.

  The balance inspection apparatus includes a hollow inspection frame, and this inspection frame has an accommodating chamber for accommodating a turbine impeller (a part of the rotor) of the turbocharger. An air supply port for supplying air from an air supply source to the storage chamber side is formed on the lower surface of the inspection frame, and an air discharge port for discharging air from the storage chamber side is formed on the side surface of the inspection frame. Is formed. On the outer peripheral surface of the inspection frame, clamp claws that press the flange portion of the bearing housing of the turbocharger toward the flange portion side of the inspection frame are provided at intervals in the circumferential direction. A fluid pressure cylinder for moving the plurality of clamp claws in the clamping / unclamping direction is provided.

  Accordingly, the flange portion of the bearing housing is abutted against the flange portion of the inspection frame. Then, the plurality of clamp claws are moved in the clamping direction by the operation of the fluid pressure cylinder, and the flange portion of the bearing housing is pressed toward the flange portion side of the inspection frame by the plurality of clamp claws. Thereby, the bearing housing can be attached to the inspection frame in a state where the turbine impeller is accommodated in the accommodation chamber.

  After the bearing housing is attached to the inspection frame, the rotor including the turbine impeller is rotated at a high speed by supplying air from the air supply source to the accommodation chamber side (in other words, the turbine impeller side). Then, acceleration vibration of the turbocharger is measured by an acceleration pickup (an example of a vibration pickup) set at an appropriate position such as a bearing housing. Thereby, the high-speed balance of the turbocharger can be inspected.

In addition, there exists a thing shown to patent document 1 as a prior art relevant to this invention.
JP 2002-39904 A

  By the way, as described above, in order to attach the bearing housing to the inspection frame, the balance inspection device needs to be equipped with a fluid pressure cylinder and a piping structure for operating the fluid pressure cylinder. There is a problem that the cost (inspection cost) required for the high-speed balance inspection of the turbocharger increases.

  Accordingly, an object of the present invention is to provide a mounting jig having a novel configuration that can solve the above-described problems while sufficiently ensuring the inspection accuracy of the high-speed balance of the rotating machine.

  A feature of the present invention is that at least an intermediate portion of the mounting jig used when mounting the housing of the rotating machine on the inspection frame of the balance inspection apparatus for inspecting the high-speed balance of the rotating machine has an arc shape. The first holding groove is formed to hold the flange portion of the inspection frame and the flange portion of the housing in a state of being in contact with the inside of the intermediate portion from one side, and the first slit is formed outside the intermediate portion. 1 clamp arm and a base end portion are connected to a base end portion of the first clamp arm so as to be swingable, at least an intermediate portion has an arc shape, and a flange portion of the inspection frame is provided inside the intermediate portion. A second clamp groove in which a second holding groove is formed to hold from the other side with the flange portion of the housing being in contact, and a second slit is formed outside the intermediate portion. When, the gist that anda fastening member for fastening the distal end of the tip portion of the first clamping arm and the second clamp arm.

  According to a feature of the invention, the flange portion of the housing is abutted against the flange portion of the inspection frame. The flange portion of the inspection frame and the flange portion of the housing in a state of being in contact with each other by the first holding groove of the first clamp arm and the second holding groove of the second clamp arm are arranged on both sides (one side and the other side). Hold from). Further, the distal end portion of the first clamp arm and the distal end portion of the second clamp arm are fastened by the fastening member. Accordingly, the housing can be attached to the inspection frame without using a fluid pressure cylinder.

  After the housing is attached to the inspection frame, the rotor of the rotating machine is rotated at a high speed. Then, the vibration of the rotating machine is measured by a vibration pickup set at an appropriate position such as the housing. Thereby, the high-speed balance of the rotating machine can be inspected. Here, since the first slit is formed outside the intermediate portion of the first clamp arm and the second slit is formed outside the intermediate portion of the second clamp arm, the rotor of the rotating machine During rotation, the flange portion of the inspection frame and the flange portion of the housing in a state in which the first holding groove of the first clamp arm and the second holding groove of the second clamp arm are in contact with each other may be fitted. And variations in measurement values of the vibration pickup can be suppressed.

  According to the present invention, it is possible to attach the housing to the inspection frame without using a fluid pressure cylinder, and to suppress variations in measured values of the vibration pickup during rotation of the rotor of the rotating machine. Therefore, it is possible to reduce the cost (inspection cost) required for the inspection of the high-speed balance of the rotating machine while sufficiently increasing the inspection accuracy of the high-speed balance of the rotating machine and suppressing an increase in the size of the balance inspection apparatus. be able to.

  An embodiment of the present invention will be described with reference to FIGS. 1 (a) and 1 (b) and FIG.

  Here, FIG. 1 (a) is a view showing a mounting jig according to an embodiment of the present invention, FIG. 1 (b) is a view showing an arrow IB in FIG. 1 (a), and FIG. It is sectional drawing which shows the state which attached the bearing housing of the turbocharger to the test | inspection flame | frame of a test | inspection apparatus. In FIG. 2, “F” indicates the forward direction and “R” indicates the backward direction.

  First, before explaining a mounting jig according to an embodiment of the present invention, a turbocharger and a balance inspection apparatus according to an embodiment of the present invention will be described.

  As shown in FIG. 2, the turbocharger 1 according to the embodiment of the present invention supercharges the air supplied to the engine using the energy of the exhaust gas from the engine (not shown). The turbocharger 1 includes a bearing housing 3, a turbine housing (not shown) provided on the front side of the bearing housing 3, and a compressor housing (not shown) provided on the rear side of the bearing housing 3. Yes. Note that when performing a high-speed balance test of the turbocharger 1, the turbine housing and the compressor housing are removed from the bearing housing 3.

  A plurality of bearings 5 are provided in the bearing housing 3, and a turbine shaft 7 extending in the front-rear direction is rotatably provided on the plurality of bearings 5. A turbine impeller 9 is integrally provided at the front end portion of the turbine shaft 7, and the turbine impeller 9 is covered with a turbine housing in an operating state. Further, a compressor impeller 11 is integrally provided at the rear end portion of the turbine shaft 7 via a mounting nut 13, and the compressor impeller 11 is covered with a compressor housing in an operating state.

  A gas supply passage (not shown) for supplying exhaust gas to the turbine impeller 9 side is formed at an appropriate position of the turbine housing, and the exhaust gas is discharged from the turbine impeller 9 side on the front side of the turbine housing. A discharge channel (not shown) is formed. An air supply passage (not shown) for supplying air to the compressor impeller 11 side is formed at an appropriate position of the compressor housing, and compressed air is supplied to the compressor impeller 11 side at an appropriate position of the compressor housing. An air discharge passage (not shown) for discharging from is formed. The gas supply channel and the air discharge channel can be connected to the engine cylinder, respectively.

  The balance inspection device 15 according to the embodiment of the present invention is a device that inspects the high-speed balance of the turbocharger 1, and includes a support frame 17 and a hollow inspection frame 19 provided on the upper portion of the support frame 17. I have. In addition, the inspection frame 19 has an accommodating chamber 21 for accommodating the turbine impeller 9 (a part of the rotor of the turbocharger 1) inside. Further, an air supply port 25 for supplying air from the air supply source 23 to the accommodation chamber 21 side is formed on the lower surface of the inspection frame, and air is discharged from the accommodation chamber 21 side to the front side of the inspection frame 19. An air discharge port 27 is formed.

  Then, the attachment jig which concerns on embodiment of this invention is demonstrated.

  As shown in FIGS. 1A and 1B and FIG. 2, the mounting jig 29 according to the embodiment of the present invention is used when the bearing housing 3 of the turbocharger 1 is attached to the inspection frame 19 of the balance inspection device 15. The specific configuration of the mounting jig 29 according to the embodiment of the present invention is as follows.

  That is, the mounting jig 29 according to the embodiment of the present invention includes a first clamp arm 31, and an intermediate portion of the first clamp arm 31 has an arc shape, A first insertion hole 33 is formed through the tip portion. A first holding groove 35 for holding the flange portion 19f of the inspected frame 19 and the flange portion 3f of the bearing housing 3 from one side is formed inside the intermediate portion of the first clamp arm 31. The first holding groove 35 extends in the arc direction. Further, a first slit 37 is formed outside the intermediate portion of the first clamp arm 31 so as to communicate with the first holding groove 35. The first slit 37 extends along the first holding groove 35. It extends in the arc direction.

  The base end portion of the second clamp arm 39 is connected to the base end portion of the first clamp arm 31 via a connecting pin 41 and a long hole 43, and the intermediate portion of the second clamp arm 39 has an arc shape. The second insertion hole 45 is formed through the distal end portion of the second clamp arm 39. A second holding groove 47 for holding the flange portion 19f of the inspected frame 19 and the flange portion 3f of the bearing housing 3 from the other side is formed inside the intermediate portion of the second clamp arm 39. The second holding groove 47 extends in the arc direction. Further, a second slit 49 is formed outside the intermediate portion of the second clamp arm 39 so as to communicate with the second holding groove 47. The second slit 49 extends along the second holding groove 47. It extends in the arc direction.

  The mounting jig 29 includes, in addition to the first clamp arm 31 and the second clamp arm 39, a fastening member 51 that fastens the distal end portion of the first clamp arm 31 and the distal end portion of the second clamp arm 39 as a constituent element. The fastening member 51 includes a fastening bolt 53 that can be inserted into the first insertion hole 33 of the first clamp arm 31 and the second insertion hole 45 of the second clamp arm 39, and a fastening that can be screwed into the fastening bolt 53. It consists of a nut 55.

  Then, the effect | action and effect of embodiment of this invention are demonstrated.

  The flange portion 3 f of the bearing housing 3 is abutted against the flange portion 19 f of the inspection frame 19. Then, the flange portion 19f of the inspection frame 19 and the flange portion 3f of the bearing housing 3 in a state of being in contact with each other by the first holding groove 35 of the first clamp arm 31 and the second holding groove 47 of the second clamp arm 39 are arranged on both sides (one side). And the other side). Further, the fastening bolt 53 is inserted into the first insertion hole 33 of the first clamp arm 31 and the second insertion hole 45 of the second clamp arm 39, and the fastening nut 55 is tightened, whereby the distal end portion of the first clamp arm 31 is secured. And the tip of the second clamp arm 39 is fastened. As a result, the bearing housing 3 can be attached to the inspection frame 19 without using a fluid pressure cylinder.

  After the bearing housing 3 is attached to the inspection frame 19, the air from the air supply source 23 is supplied to the accommodation chamber 21 side (in other words, the turbine impeller 9 side), whereby the turbine impeller 9, the turbine shaft 7, and the turbine The impeller 9 is rotated at high speed. Then, acceleration vibration of the turbocharger 1 is measured by the acceleration pickup 57 set at an appropriate position of the bearing housing 3. Thereby, the high-speed balance of the turbocharger 1 can be inspected. Here, the first slit 37 is formed outside the intermediate portion of the first clamp arm 31 so as to communicate with the first holding groove 35, and the second slit 49 is formed outside the intermediate portion of the second clamp arm 39. Since it is formed so as to communicate with the holding groove 47, the first holding groove 35 of the first clamp arm 31 and the second holding groove 47 of the second clamp arm 39 are abutted during rotation of the rotor such as the turbine impeller 9. It is possible to fit into the flange portion 19f of the inspection frame 19 and the flange portion 3f of the bearing housing 3 in a state of being in check, and variations in measured values of the acceleration pickup 57 can be suppressed (see examples described later).

  As described above, according to the embodiment of the present invention, the bearing housing 3 can be attached to the inspection frame 19 without using a fluid pressure cylinder, and the acceleration pickup 57 can be measured while the rotor such as the turbine impeller 9 is rotating. Since the dispersion of the values can be suppressed, the cost required for the high-speed balance inspection of the turbocharger 1 while suppressing the enlargement of the balance inspection device 15 while sufficiently ensuring the high-speed balance inspection accuracy of the turbocharger 1 ( (Inspection cost) can be reduced.

  The present invention is not limited to the description of the above-described embodiment. For example, the mounting jig 29 according to the embodiment of the present invention is used when a housing of a rotating machine other than the turbocharger 1 is mounted. The present invention can be implemented in various modes. Further, the scope of rights encompassed by the present invention is not limited to these embodiments.

  Examples will be described with reference to FIGS. 3A, 3B, 4 and 5. FIG.

  Here, FIG. 3 (a) is a view showing a mounting jig according to a comparative example, FIG. 3 (b) is a view showing an arrow IIIb in FIG. 3 (a), and FIG. The figure which shows the result of the impact test of the bearing housing attached using the attachment jig which concerns on a form, FIG. 5 is the figure which shows the result of the impact test of the bearing housing attached using the attachment jig which concerns on a comparative example It is.

  The bearing housing 3 attached to the inspection frame 19 is hit with a hammer (not shown) using the attachment jig 29 according to the embodiment of the present invention, and the acceleration transfer function of the bearing housing 3 is measured by the acceleration pickup 57. Thus, the impact test (the impact test of the example) of the bearing housing 3 is performed, and the results are summarized as shown in FIG. Similarly, the bearing housing 3 attached to the inspection frame 19 is hit with a hammer using the attachment jig 59 according to the comparative example (see FIGS. 3A and 3B), and the acceleration pickup 57 By measuring the transfer function of acceleration, the impact test of the bearing housing 3 (the impact test of the comparative example) is performed, and the results are summarized as shown in FIG. As shown in FIGS. 3A and 3B, the attachment jig 59 according to the comparative example is the attachment jig according to the embodiment of the present invention, except that the first slit and the second slit are omitted. 29 has substantially the same configuration.

  That is, according to the result of the hit test described above, the bearing housing 3 is mounted using the mounting jig 59 according to the comparative example by mounting the bearing housing 3 using the mounting jig 29 according to the embodiment of the present invention. Compared to the case, it was confirmed that the variation in the measurement value of the acceleration pickup 57 was reduced in the main measurement range (1700 to 3800 Hz).

Fig.1 (a) is a figure which shows the attachment jig which concerns on embodiment of this invention, FIG.1 (b) is a figure which shows the arrow part IB in Fig.1 (a). It is sectional drawing which shows the state which attached the bearing housing of the turbocharger to the test | inspection flame | frame of a balance test | inspection apparatus. Fig.3 (a) is a figure which shows the attachment jig which concerns on a comparative example, FIG.3 (b) is a figure which shows the arrow view part IIIb in Fig.3 (a). It is a figure which shows the result of the impact test of the bearing housing attached using the fixture which concerns on embodiment of this invention. It is a figure which shows the result of the impact test of the bearing housing attached using the attachment jig concerning a comparative example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Turbocharger 3 Bearing housing 3f Flange part 9 Turbine impeller 11 Compressor impeller 13 Mounting nut 15 Balance inspection device 19 Inspection frame 19f Flange part 21 Accommodating chamber 29 Mounting jig 31 First clamp arm 33 First insertion hole 35 First holding groove 37 first slit 39 second clamp arm 41 connecting pin 43 long hole 45 second insertion hole 47 second holding groove 49 second slit 51 fastening member 53 fastening bolt 55 fastening nut 57 acceleration pickup

Claims (3)

In the mounting jig used when attaching the housing of the rotating machine to the inspection frame of the balance inspection device for inspecting the high-speed balance of the rotating machine,
A first holding groove that holds the flange portion of the inspection frame and the flange portion of the housing in a state of being in contact with the inside of the intermediate portion from one side is formed, and at least the intermediate portion has an arc shape. A first clamp arm having a first slit formed on the outside;
A base end portion is slidably connected to a base end portion of the first clamp arm, and at least an intermediate portion has an arc shape, and a flange portion of the inspection frame and a flange portion of the housing are located inside the intermediate portion. A second holding arm formed with a second holding groove for holding from the other side in a state of contacting, and a second slit formed on the outer side of the intermediate part,
A fastening member that fastens the distal end of the first clamp arm and the distal end of the second clamp arm;
A mounting jig characterized by comprising:   The mounting jig according to claim 1, wherein the first slit is formed to communicate with the first holding groove, and the second slit is formed to communicate with the second holding groove. . A first insertion hole is formed through the distal end of the first clamp arm, and a second insertion hole is formed through the distal end of the second clamp arm;
The fastening member includes a fastening bolt that can be inserted into the first insertion hole of the first clamp arm and the second insertion hole of the second clamp arm, and a fastening nut that can be screwed into the fastening bolt. The mounting jig according to claim 1 or 2, wherein

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