This standard specifies the vibration measurement method for ship engine room auxiliary machinery such as diesel generators, steam turbine generators, air compressors, refrigerators, pumps, ventilators and oil separators. This standard applies to the vibration measurement of engine room auxiliary machinery under normal working conditions. This standard is not applicable to finding vibration sources, diagnosing faults, studying local vibration or other research purposes. GB 11706-1989 Measurement method for vibration intensity of ship engine room auxiliary machinery GB11706-1989 standard download decompression password: www.bzxz.net

UC 621. 431. 73 -: 534. 6
National Standard of the People's Republic of China
CB 11706- 89
Measurement method of vibration for marine engine room auxiliary machinery
1989-1-14 Issued
National Technical Supervision
199005-01 Implementation
National Standard of the People's Republic of China
Measurement method of vibration for marine engine room auxiliary machinery
GB 11706 -89
This standard adopts the international standard group: 1S039459 Speed ​​10--2001/Large Energy Conversion Machine--Vibration Severity Test and Evaluation 3,
Subject content and scope of application
This standard specifies the vibration registration method for marine engine room equipment such as steam generators, turbine generators, air compressors, refrigeration, recording, ventilators and oil engines
This standard is applicable to engine room auxiliary equipment in actual working state. This standard is applicable to the following sources: diagnosis of faults, local vibration or other research and development. 2 Reference standards
2298 Impact vibration, shock adjustment technology
3 Measurement quantity
31 This standard stipulates that the root mean square of the vibration speed is the test item to characterize the wing vibration test. It is expressed by formula (1): (1)
wherein, the original root mean square of vibration intensity is r;
the function of vibration intensity changing at any time, mm/s; T
the measurement period.
When the vibration record is the end value of each simple spectrum component of the vibration velocity obtained by spectrum analysis, the vibration velocity mean square value K can be calculated by formula 2:
3.2 This standard adopts the basic vibration scale of the whole machine as the evaluation return value of the function report, which is defined as shown in formula (3): ()-(equal)+(love)
wherein, 1, the maximum vibration intensity, mm/s
.,,---are the root mean square values ​​of vibration intensity in the x, y, and z directions. mm/s,,---are the number of measuring points in,, and one direction respectively. Approved by the National Technical Supervision Bureau on October 14, 1989. (2)
1990-05-01
4 Measuring instruments
4.1 Measuring instrument system
GB117D6
Vibration measuring system - consists of sensors, preamplifiers, indicators and recorders. The following are as follows:
4.2 Measurement frequency range and system error
4.2. The vibration measurement frequency range is 10Hz to 100Hz.
4.2.2 If the vibration frequency of the unit is below 10Hz, the frequency range of the measuring system should be selected between 2Hz and 100Hz.
4.2.3 The system error of the measuring system should be less than ±1% and the upper and lower limits of the deceleration rate should not be less than 12 frequency or 4 degrees/decade.
4.3 Measurement shall only be based on the calibration of the system
4.3.1 The measuring instrument shall be calibrated by the design department of the region and have a certificate of qualification. 4.3.2 When calibrating the measuring system, the sensor shall be excited by vibration. The deviation of the direction of the sensitive axis of the detector shall not be greater than ±5 to avoid total wave distortion of the reported speed, or less than 5%. The uncertainty of the exciting speed within the entire measuring frequency range shall be less than 3%.
4.4 Installation of the sensor and cable connection
4.4.1 The sensor should be an accelerometer or a speedometer. 1.4.2 The sensor can be mounted on the object to be measured by means of adhesive, magnet or bolts, etc. Its resonant frequency is not allowed to appear in the working range of the measuring system.
4.4.3 The amount of energy should not affect the measuring part's motion characteristics, and the mass should be as small as possible. 4.4.4 The sensor's installation part must be free of traces, dirt and other impurities that affect the test. The installation surface should be flat. 4.4.5 The sensor should be fixed in a fixed way, and the relay and the object to be measured cannot move in a straight line. 4.4.6 The sensor and the connecting relay should work in a suitable working environment (humidity, temperature, magnetic field, anti-sinking, housing, etc.). 4.5 Preamplifier
4.5.1 The preamplifier should be a charge amplifier or a voltage amplifier. 4.5.2 The amplifier must match the output of the sensor, and the gain and error between each gear must be less than 0.3. 4.6 Indicator
4.6.1 The indicator can be a meter-type instrument. Graphic display can be a desensitized type indicator. 4.6.2 The indicator should be able to indicate the extreme value of the mean vibration velocity at the mountain point, and the correction error should be less than 2.5% of the full scale value. 4.6.3 The indicated value of the push-type dummy shall be between 20% and 8% of the full scale value. 5. Layout of measuring points and measurement direction 5.1 Layout of measuring points GB1170689 5.1.1 The measuring points shall be selected on the machine surface, top, bearing and machine base which represent the overall quality of the machine. They shall not be installed on the machine with poor brushing performance or excessive vibration of the quality part. 5.1.2 Four to eight measuring points shall be selected for each machine. 5.2 Measurement pair: The vibration measurement shall be carried out in three directions which are perpendicular to each other. The direction perpendicular to the mounting surface of the dummy is called “direction” and is marked with a. The direction along the machine axis is called “direction” and is marked with a. The vertical xy level can be called the "core", and the marking is 5.3. The measuring point is marked with a controllable number such as the beautiful text shrimp cut, as shown in Appendix B. For example, 1x, 1y. 1z represents the measurement in the xyz direction of the first measuring point, see Appendix, 6.1 When the equipment reaches the normal operating state (for example: the bottle has a certain voltage, current, pressure, power and load, etc.), it can be measured in reverse. 6.2 Navigation measurement should be level 3 sea condition, ship platinum sentence 6.3 When sailing at high speed, the influence of environmental vibration should be considered. ? Measurement Procedure
? 1. After each turn and measurement, the measurement system should be calibrated and collected in reverse 7.2. Measurement point: install the transducer and arrange the connection cable 7.3. When the equipment is in a vibrating environment, the basic vibration data should be measured and recorded 7.4. The new vibration data should be measured and recorded.
Measurement report
The content of the measurement report should include:
The measurement equipment and equipment details Table, its format is shown in Table A (supplement) AI: Measurement system schematic diagram
Auxiliary machine dynamic filter point layout diagram, its ticket type diagram is shown in Appendix 1: Report measuring point speed root mean square value, its table format is shown in Table A2, sensor performance detailed table, its format is shown in A3: Continuation and analysis,
Part water painting
Spiral rice leaf
Factory decoration
Measurement setting egg life
Starting position
Determined rotation
Amount of dynamic rate||tt ||Installation type
m*/mln
Asia location
Measurement ratio
GB7173689
Appendix A
Test report summary
(Supplementary parts)
Detailed list of measurement equipment and measuring instruments
Only name
Source
Measurement instrument
Modification instrument
Analysis equipment
Record request instrument
n Table A2 Dynamic test results, total level mm/s (RMS value) Working condition Environmental data Sensor type Sensor room number Dust generation Electrical sensitivity Voltage sensitivity Highest operating sensitivity Maximum positive dynamic Maximum impact strength Base strain frequency GE 117 06-89
Continued Table A2www.bzxz.net
Table A3 Sensor Performance Specification
Appendix B
Recommended Diagram of Typical Auxiliary Machine Perturbation Measurement Point Arrangement
(Test Material)
Recommended Diagram of Typical Auxiliary Machine Perturbation Measurement Point Arrangement See National 81~H5 Circulation Measurement
CB11706
Air Compressor
Figure B2 Fan
GB1170689
Figure M Horizontal Image
Additional Notes:
Gp: 1706
Figure 5 Oil Separator
This standard is the general public of China.The Institute proposed that the standard should be submitted to the National Wax Machinery Standardization Technical Committee. This standard was drafted by the 74th Research Institute of the 7th Research Institute of China State Shipbuilding Corporation, and the main contributors to this standard were Qian Wang.
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