JP5092691B2 - Calibration equipment for power test equipment - Google Patents

Description

  The present invention relates to a calibration device for a power test apparatus in which a shaft torque meter is arranged on the torque input side of an electric dynamometer and performs torque measurement.

  FIG. 6 is a partially longitudinal front view of the calibration device of the conventional power test apparatus disclosed in Patent Document 1, wherein 1 is a bed, 2 is levitated on a bed 1 via a levitation bearing 3, and can swing freely. The oscillating portion 5 of the supported electric dynamometer 4 is a rotating shaft of the electric dynamometer 4 rotatably supported by the oscillating portion 2 via a bearing 6, and the rotating shaft 5 includes couplings 7 to 9. One end of a shaft torque meter 11 rotatably supported by the bearing 10 is connected to the other end of the shaft torque meter 11, and the other end of the shaft torque meter 11 is connected to a rotating shaft on the machine under test side via a coupling 12 during a test. However, a calibration arm 13 is attached to the coupling 12 during calibration, and a calibration weight 14 is suspended from the calibration arm 13.

  Further, a torque arm 15 is provided in the swinging portion 2 so as to protrude in the horizontal direction, and a load cell (load cell) 16 provided on the bed 1 is connected to the torque arm 15. Reference numeral 17 denotes a lock portion fixed to the swing portion 2 of the electric dynamometer 4 and inserted and fixed to the coupling 7. The rotary shaft 5 and the swing portion 2 are integrated via the lock portion 17. Is done.

In the above configuration, when measuring the torque, that is, when testing the device under test, the lock portion 17, the calibration arm 13 and the calibration weight 14 are removed, and the rotary shaft of the device under test such as an engine is connected to the coupling 12, and the device under test is removed. The electric dynamometer 4 is rotated through the shaft torque meter 11 by driving the test machine, the torque of the electric dynamometer 4 is detected by the load meter 16, and the shaft torque is detected by the shaft torque meter 11. At the time of calibration, the lock portion 17 is attached, and the rotating shaft 5 and the swinging portion 2 are integrated. Further, the rotating shaft of the machine under test is removed from the coupling 12, the calibration arm 13 is attached to the coupling 12, and the calibration weight 14 is suspended from the calibration arm 13. Thereby, a predetermined torque is applied to the electric dynamometer 4 via the shaft torque meter 11, and the measurement value of the load meter 16 at this time is compared with the predetermined torque to perform calibration of the electric dynamometer 4. . Further, the shaft torque meter 11 is applied with a shaft torque on the shaft end opposite to the electric dynamometer 4 side, and couplings 7 to 9 and a lock portion are connected to the shaft end of the shaft torque meter 11 on the electric dynamometer 4 side. 17, fixed by a load meter 16 via the swing unit 2 and the torque arm 15, the shaft torque is measured by the shaft torque meter 11, and the shaft torque meter 11 is compared by comparing the applied shaft torque with the measured shaft torque. Calibration is performed. Thus, when two types of the torque meter 11 and the load meter 16 are equipped as the torque meter, the calibration arm 13 is attached to the electric dynamometer 4 on the side where the shaft torque meter 11 is attached. By placing the calibration weight 14, calibration of both the shaft torque meter 11 and the load meter 16 can be performed simultaneously.
JP 2006-220572 A

  However, in the prior art disclosed in Patent Document 1, the calibration arm 13 and the calibration weight 14 may not be attached to the shaft torque meter 11 side due to, for example, a work space problem. In such a case, the calibration arm 13 and the calibration weight 14 are attached to the side opposite to the axial torque meter 11 side. In this case, the torsion torque by the calibration arm 13 is transmitted to the load meter 16, but the axial torque meter 11. Therefore, the calibration of the shaft torque meter 11 cannot be performed, and the calibration of the shaft torque meter 11 must be performed with the shaft torque meter 11 removed, and the calibration of the shaft torque meter 11 and the load meter 16 is performed. The workability was poor, and the calibration accuracy was also poor.

  The present invention has been made to solve the above-described problems. An electric dynamometer is provided with a calibration arm and a calibration weight attached to a shaft end opposite to the shaft torque meter side of the electric dynamometer. The load meter and shaft torque meter can be calibrated, and even if the work space cannot be secured on the shaft torque meter side of the electric dynamometer, the load meter and shaft torque meter of the electric dynamometer can be removed without removing the shaft torque meter. It is an object of the present invention to obtain a calibration device for a power test apparatus that can perform calibration work and can improve calibration workability and calibration accuracy.

  A calibration device for a power test apparatus according to a first aspect of the present invention includes an axial torque meter interposed between a rotating shaft of an electric dynamometer and a rotating shaft on the machine under test side, and an oscillating portion of the electric dynamometer. In a calibration device for a power test apparatus that measures the torque of a machine under test by providing a load meter between the torque arm projecting from the fixed portion, the electric dynamometer at the time of calibration of the load meter of the electric dynamometer and the shaft torque meter A lock unit that integrates the rotating shaft and swinging unit of the motor, and a calibration attached to the shaft end side opposite to the shaft torque meter side of the electric dynamometer during calibration of the load meter and shaft torque meter of the electric dynamometer An arm, a calibration weight suspended from the calibration arm during calibration of the load meter of the electric dynamometer and the shaft torque meter, a load meter separation unit for separating the load meter from the torque arm during calibration of the shaft torque meter, and a shaft torque meter Axis during calibration An electric dynamometer side of Rukumeta mounted on the shaft end side of the opposite side, in which a rotary locking unit for locking the rotation of the shaft torque meter.

  In the calibration device for a power test apparatus according to a second aspect, the lock portion is provided integrally with a horseshoe-shaped main body portion that is attached to a coupling between a rotating shaft of a dynamometer and a shaft torque meter, And an attachment portion attached to the outer end portion in the axial direction of the moving portion.

  In the calibration device for a power test apparatus according to claim 3, the lock portion is attached to a key groove provided in a coupling between the rotating shaft of the electric dynamometer and the shaft torque meter, and a swinging portion of the electric dynamometer. The key support portion is provided so as to be able to appear and retract, and includes a key that fits into the key groove.

  As described above, according to the present invention, calibration of the electric dynamometer and the shaft torque meter can be performed in a state where the calibration arm and the calibration weight are provided at the shaft end opposite to the shaft torque meter side of the electric dynamometer. Even if the work space cannot be secured on the shaft torque meter side of the electric dynamometer, the load meter of the electric dynamometer and the calibration work of the shaft torque meter can be performed without removing the shaft torque meter. In addition, since both calibration operations can be performed using the same calibration arm and calibration weight, the calibration workability is improved and the calibration accuracy is improved.

Best Embodiment 1
The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 shows a partially longitudinal front view of a calibration device of a power test apparatus according to Embodiment 1 of the present invention. Reference numeral 18 denotes a shaft torque meter with a bearing, which is one end of a shaft of the shaft torque meter 18, that is, an electric dynamometer. A coupling 12 is attached to the shaft end opposite to the 4 side, and the rotating shaft of a machine under test such as an engine is connected to the coupling 12 during the test, but the bed 1 side is calibrated when the shaft torque meter 18 is calibrated. The rotation lock unit 19 attached to the shaft is attached, and the rotation of the shaft torque meter 18 is locked. One end of the rotating shaft 5 of the electric dynamometer 4 is connected to the other end of the shaft torque meter 18 via couplings 7 to 9. The oscillating part 2 of the electric dynamometer 4 is levitated by a levitation bearing 3 and supported so as to freely oscillate. The oscillating part 2 supports a rotary shaft 5 via a bearing 6 so as to be rotatable. Further, a torque arm 15 is provided so as to protrude from the swinging portion 2, and a load meter (load cell) 16 is provided between the torque arm 15 and the bed 1 which is a fixed portion. A separation part 20 is provided.

  The load cell separating portion 20 is configured as shown in FIGS. 2A and 2B, and the connecting portion 16a of the load meter 16 is detachably connected to the torque arm 15 via a bolt 21 and a pin 22, so that the load meter 16 is housed in the cover 23, and the connecting portion 16 a is inserted outside through the insertion hole 23 a at the upper end of the cover 23. The lower end portion of the load meter 16 is connected to the fixed portion 24 so as to be tiltable. When the load meter 16 is calibrated, the torque arm 15 and the load meter 16 are connected as shown in FIG. 2A, and when the shaft torque meter 18 is calibrated, the bolt 21 is removed as shown in FIG. 2B. The connecting portion 16a is removed from the torque arm 15, the load cell 16 is gently tilted to the opposite side of the torque arm 15, the connecting portion 16a is gently brought into contact with the insertion hole 23a of the cover 23, and the load meter 16 is removed from the torque arm 15. Separate.

  Further, when the load meter 16 and the shaft torque meter 18 of the electric dynamometer 4 are calibrated, a lock portion 17 is attached between the coupling 7 and the swinging portion 2, and the rotating shaft 5 and the swinging portion 2 of the electric dynamometer 4 are mounted. And unite. Similarly, when the load meter 16 of the electric dynamometer 4 and the shaft torque meter 18 are calibrated, a calibration arm 26 is attached to the end of the shaft opposite to the shaft torque meter 18 of the electric dynamometer 4 via a coupling 25. The calibration weight 27 is suspended from the calibration arm 26.

  FIG. 3 is a perspective view of the lock portion 17, and a horseshoe-shaped main body portion 17 a attached to the coupling 7 for connecting the rotating shaft 5 of the electric dynamometer 4 and the shaft torque meter 18, and the main body portion 17 a integrally. The main body portion 17a is provided with a bolt insertion hole 17c for attachment to the coupling 22, and the attachment portion 17b is provided with a rocking portion. A bolt insertion hole 17d for attachment to the moving part 2 is provided.

  Next, the operation of the above configuration will be described. When measuring the power and shaft torque, that is, when testing the machine under test, the rotation lock unit 19, the lock unit 17, the calibration arm 26 and the calibration weight 27 are removed, and the rotary shaft of the machine under test such as an engine is connected to the coupling 12. Then, the electric dynamometer 4 is rotated through the shaft torque meter 18 by driving the device under test, the torque of the electric dynamometer 4 is measured by the value of the load meter 16, and the shaft torque is measured by the shaft torque meter 18. To do. On the other hand, when the electric dynamometer 4 is calibrated, that is, when the load meter 16 is calibrated, the lock portion 17 is attached to integrate the rotating shaft 5 and the swinging portion 2 of the electric dynamometer 4 and the rotating shaft of the machine under test. Is removed from the coupling 12, a calibration arm 26 is attached to the coupling 25, and a calibration weight 27 is suspended from the calibration arm 26. As a result, a predetermined torque is applied to the electric dynamometer 4, and the load meter 16 of the electric dynamometer 4 is calibrated by comparing the measured value of the load meter 16 at this time with the predetermined torque. Further, when the shaft torque meter 18 is calibrated, the load arm disconnecting portion 20 disconnects the torque arm 15 and the load meter 16, and the shaft end side opposite to the electric dynamometer 4 side of the shaft torque meter 18, that is, coupling. A rotation lock portion 19 attached to the bed 1 side is attached to 12 and the rotation of the shaft torque meter 18 is locked. Thus, a predetermined shaft torque is applied to the other end of the shaft torque meter 18 with one end fixed, and the shaft torque meter 18 is calibrated by comparing this shaft torque with the measured shaft torque.

  In the first embodiment described above, the load meter 16 and the shaft torque of the electric dynamometer 4 with the calibration arm 26 and the calibration weight 27 provided at the shaft end opposite to the shaft torque meter 18 side of the electric dynamometer 4. Calibration of the meter 18 can be performed. For this reason, even if the working space cannot be secured on the shaft torque meter 18 side of the electric dynamometer 4, the load meter 16 and the shaft torque meter 18 of the electric dynamometer 4 are calibrated without removing the shaft torque meter 18. Can do. Further, since both calibration operations can be performed using the same calibration arm 26 and calibration weight 27, the calibration workability can be improved and the calibration accuracy can be improved.

Embodiment 2
FIG. 4 shows a partially omitted front view of the calibration device of the power test apparatus according to the second embodiment, and an intermediate shaft 29 is connected to the coupling 8 via a flange-type shaft torque meter 28 and a coupling 9. 29 is rotatably supported by a bearing 30 placed on the bed 1 side. A rotation lock portion 19 is attached to the shaft end portion of the intermediate shaft 29 opposite to the electric dynamometer 4 side via the coupling 12 when the shaft torque meter 28 is calibrated. Other configurations are the same as those of the first embodiment.

  In the second embodiment, the shaft torque meter 28 has a flange shape, and an intermediate shaft 29 supported by a bearing 30 is used. The operational effects are the same as in the first embodiment.

Embodiment 3
FIG. 5 shows a front view of the lock portion according to the third embodiment, and the lock portion 31 that integrates the rotary shaft 5 and the body portion 2 of the electric dynamometer 4 includes the rotary shaft 5 and the shaft torque meter 18 side. From a key groove 7a provided in the coupling 7 for coupling, and a key 33 provided in a key support part 32 provided at the outer end in the axial direction of the oscillating part 2 so as to be retractable and fitted to the key groove 7a. Composed. A bolt hole 7 b is connected to the coupling 8.

  In the above-described configuration, the key 33 is fitted into the key groove 7a of the coupling 7, whereby the rotating shaft 5 and the swinging portion 2 of the electric dynamometer 4 are integrated. Other configurations and effects are the same as those of the first embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially longitudinal front view of a calibration device of a power test apparatus according to Embodiment 1 of the present invention. It is a vertical front view at the time of load meter calibration of the load meter separation part and shaft torque meter calibration according to Embodiment 1 of the present invention. FIG. 3 is a perspective view of a lock unit according to the first embodiment. It is a partially omitted front view of the calibration device of the power test device according to the second embodiment. It is a front view of the lock part by Embodiment 3. It is a partial longitudinal cross-sectional front view of the calibration apparatus of the conventional power test apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bed 2 ... Swing part 3 ... Floating bearing 4 ... Electric dynamometer 5 ... Rotary shaft 6,30 ... Bearing 7-9, 12, 25 ... Coupling 7a ... Keyway 15 ... Torque arm 16 ... Load meter 17, DESCRIPTION OF SYMBOLS 31 ... Lock part 17a ... Main body part 17b ... Mounting part 18 ... Shaft torque meter 19 ... Rotation lock part 20 ... Load meter separation part 26 ... Calibration arm 27 ... Calibration weight 28 ... Flange type shaft torque meter 29 ... Intermediate shaft 32 ... Key Support part 33 ... key

Claims (3)

  A shaft torque meter is inserted between the rotating shaft of the electric dynamometer and the rotating shaft on the EUT, and a load meter is provided between the torque arm protruding from the swinging portion of the electric dynamometer and the fixed portion. In the calibration device of the power test apparatus that measures the torque of the machine under test, a lock unit that integrates the rotating shaft and the swinging unit of the electric dynamometer when calibrating the load meter of the electric dynamometer and the shaft torque meter; When calibrating the load meter and shaft torque meter of the electric dynamometer, a calibration arm attached to the shaft end side opposite to the shaft torque meter side of the electric dynamometer, and when calibrating the load meter and shaft torque meter of the electric dynamometer A calibration weight suspended from the calibration arm, a load meter separation part for separating the load meter from the torque arm when the shaft torque meter is calibrated, and a shaft end opposite to the electric dynamometer side of the shaft torque meter during calibration Take on the side Vignetting, calibration device for a power test apparatus characterized by comprising a rotation lock portion for locking the rotation of the shaft torque meter.   The lock part is a horseshoe-shaped main body part that is attached to the coupling of the rotating shaft of the electric dynamometer and the shaft torque meter, and an attachment part that is provided integrally with the main body part and is attached to the axially outer end of the swing part. The calibration device for a power test apparatus according to claim 1, comprising:   The lock portion is provided in a key groove provided in the coupling between the rotating shaft of the electric dynamometer and the shaft torque meter, and a key support portion attached to the swinging portion of the electric dynamometer. The calibration device for a power test apparatus according to claim 1, further comprising a key to be fitted.

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