Some standard content:
Shipbuilding Industry Standard of the People's Republic of China
CB 3410-91
Telemetry Torque Meter for Ships
Published on November 8, 1991
China State Shipbuilding Corporation
Implementation on July 1, 1992
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Telemetry Torque Meter for Ships
Subject Content and Scope of Application
CB3410-91
Classification Number: U48
This standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging and storage of telemetry torque meter for ship (hereinafter referred to as torque meter).
This standard applies to strain gauges for measuring torque, speed and power of ship transmission shaft systems. 2 Reference standards
Packaging, storage and transportation graphic signs
Ship electronic equipment environmental test
Ship electronic equipment environmental test
Ship electronic equipment environmental test
Ship electronic equipment environmental test
Ship electronic equipment environmental test
Ship electronic equipment environmental test
Ship electronic equipment environmental test
Ship electronic equipment environmental test
Ship electronic equipment environmental test
ZBY003
High temperature test
Low temperature test
Constant humidity test Heat test
Vibration test
Impact test
Mold test
Salt spray test
Shell waterproof test
Fan surface ship
Ship engine specification
Technical conditions for packaging and transportation of instruments and meters
3 Product classification
3.1 According to the structural form:
KW type-
One fixed clamp ring type:
Fixed clamp ring type with microcomputer;
Universal clamp ring type;
Universal clamp ring type with microcomputer.
3.2 According to the power supply mode:
Battery power supply type:
Slip ring power supply type;
Induction power supply type.
3.3 Basic parameters
3.3.1 Torque meter measurement range
Torque measurement range
Greater than 1kN·m;
Speed measurement range
Less than 1500r/min.
3.3.2 The inner diameter of the universal clamp ring torque meter is in accordance with Table 1. China State Shipbuilding Corporation approved on November 8, 1991 and implemented on July 1, 1992
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Snap ring code
Snap ring inner diameter
50~100
CB3410-91
>100~150>150~250>250~350>350~450>450~550>550~650>650~7503.3.3 The inner diameter of the snap ring of the fixed snap ring torque meter is determined according to the shaft diameter of the measured shaft. 3.4 Model compilation regulations
3.4.1 Model composition
Power supply mode, according to 3.2
Snap ring size: General snap ring type is represented by snap ring code, according to Table 1 Fixed snap ring type is represented by 1/10 of the measured shaft diameter, according to 3.1
Torque meter
3.4.2 ExampleWww.bzxZ.net
Battery-powered general snap ring type ship telemetry torque meter with microcomputer, snap ring No. 15. Torque meter NKW15D
Induction power supply-powered fixed snap ring type ship telemetry torque meter, shaft diameter 240mm. Torque meter NT24G
4 Technical requirements
4.1 Environmental conditions
The torque meter should be able to work normally under the following environmental conditionsa.
Temperature: 0~55℃
Humidity: When the temperature is not greater than 40℃, the relative humidity is 92%~98%; when the temperature is greater than 40℃, the relative humidity is 67%73%. Tilt and sway
Pitch: ±10°
Roll: ±45 (cycle 3~14s)
Tilt: ±15°
Trimming: ±5°
Vibration and impact of ships during navigation and war d.
Salt spray, mildew
4.2 Performance requirements
4.2.1 Measurement accuracy is in accordance with Table 2.
Project name
Total error of torque measurement, AH
Speed error, Ar
4.2.2 Battery-powered torque meter, the battery should work normally and continuously within 4 hours. 4.3 Structure and shell requirements
Measurement accuracy
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4.3.1 The protection level of the torque meter shell is drip-proof. 4.3.2 The torque meter should have vibration reduction facilities.
4.3.3 The surface of the paint layer should be smooth and flat, with uniform color, and no defects such as blistering, wrinkling, peeling and obvious scratches should be allowed. 4.3.4 The metal coating and chemical treatment surface should be uniform in color, without exposed bottom, peeling, spots or scratches. 4.4 Insulation strength
The withstand voltage between the power supply line of the torque meter and the shell should be able to withstand a sinusoidal alternating current with a frequency of 50Hz and a voltage of 1500V. 4.5 Usage requirements
4.5.1 There should be no strong electric field and corrosive gas that affect the performance. 4.5.2 The smooth length of the measured shaft shall not be less than 200mm. 4.5.3 The power supply voltage changes from +6% to -10% of the rated voltage, and the frequency changes from ±5% of the rated rate. 5 Test methods
5.1 Environmental condition test
5.1.1 Temperature test
High temperature test shall be carried out in accordance with GJB4.2.
Low temperature test shall be carried out in accordance with GJB4.3.
5.1.2 The humidity test shall be carried out in accordance with the constant damp heat test of GJB4.5. 5.1.3 The vibration test shall be carried out in accordance with the main area conditions of the vibration test of GJB4.7. 5.1.4 The impact test shall be carried out in accordance with the impact test level I of GJB4.9. 5.1.5 The swing test shall be carried out in accordance with the provisions of GJB14.1A Section 3.2.3. 5.1.6 The salt spray test shall be carried out in accordance with the salt spray test of GJB4.11. 5.1.7 The mold test shall be carried out in accordance with the mold test of GJB4.10. 5.2 The shell protection test shall be carried out in accordance with the requirements of waterproof level 1 of GJB4.13. 5.3 Performance calibration
5.3.1 Environmental requirements
a. Ambient temperature 20±5℃;
b. Ambient humidity less than 80%.
5.3.2 The static torque calibration method is as follows:
a. Install the torque sensor to be tested on the static calibration platform, set the torque meter coefficient switch to the calibration coefficient value, adjust the standard loading force arm of the static calibration platform, tighten the balance block, adjust the zero switch of the measuring instrument, and make the torque meter digital display zero. b. Before the formal calibration, the sensor to be tested is preloaded three times, each time from zero to the rated value, and then from the rated value to zero. c. Divide the rated value range of the instrument to be tested into ten points, load point by point until the rated value, and then reduce the load from the rated value to zero point by point. Do not unload when loading, and do not load when unloading. Repeat the forward and return strokes three times and record the readings at each point. 5.3.3 The calibration method for torque error caused by speed change is as follows: a. Install the torque sensor to be tested and the torque meter on the speed calibration platform. b. Divide the working speed range of the sensor to be tested into ten points, adjust the torque meter zero switch to make the torque meter digital display zero, then increase the speed point by point to the rated value, and then reduce the speed point by point from the rated value to zero, repeat twice and record the torque and speed readings of each point of the torque meter. 5.3.4 Speed calibration method is as follows:
Install the torque sensor and the display on the calibration table. a.
b. Divide the torque sensor into ten points according to its working speed range. c
Measure the speed with a standard tachometer and compare its display value with the speed value displayed by the torque meter. Repeat twice and record the readings of the standard tachometer and torque meter.
5.3.5 Torque error calculation
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Static calibration error Aj is calculated according to formula (1):
Static calibration error, %:
Where Aj
AMjmax
CB3410—91
AMjmr·100
Absolute value of maximum error of static calibration (average of three measurements); rated torque value.
The torque error △Z caused by speed change is calculated according to formula (2):AZ
Where: 4Z
AMzmax
Torque error, %;
AMzmm.100
Absolute value of maximum error of torque caused by speed change (average of two measurements). The total measurement error AH (i.e., the total reference error) of the torque meter is calculated according to formula (3): c.
AH=[AjI+iAZ
Where: 4H
-Total measurement error,%.
5.3.6 The speed error Ar is calculated according to formula (4)
Where: Ar-
Speed error,%;
Speed display value of the torque meter;
-Standard digital tachometer display value.
5.4 Insulation strength test
Perform according to 4.4, and the withstand voltage strength test lasts for 1 minute. There should be no breakdown and flickering. 5.5 Power supply voltage test
Change the voltage and frequency according to the requirements of 4.5.3, and the instrument should work normally. 6 Inspection rules
Inspection is divided into factory inspection and type inspection
6.1 Factory inspection
6.1.1 Each torque meter shall be inspected in accordance with the provisions of Table 3. (1)
(2)
(3)
(4)
6.1.2 Products shall be inspected and qualified by the quality inspection department of the manufacturer before they can be shipped out of the factory, and the product qualification certificate shall be attached. If there are special requirements, the supply and demand parties shall stipulate them in the contract.
6.2 Type inspection
Type inspection shall be conducted in any of the following cases: a. Preliminary evaluation of new products or old products for transfer to factory production; b.
After formal production, if there are major changes in structure, materials, and processes that may affect product performance; 4 years of normal production or cumulative production of 50 units;
When the product is resumed after a long-term suspension of production for three years; when there is a significant difference between the factory inspection results and the last type inspection results; when the national quality supervision agency requires type inspection. Standard information collector wwW.17bzW.cn Easy to start standard network provides free download of 100,000 standard books and materials. Can type, 5 minutes fast self-service website www.17jzw.com Easy to start website building network provides free website building platform, commercial website 1 year only 60 yuan CB3410-91
6.3 Factory inspection and type inspection items and requirements are specified in Table 3. Table 3
Inspection category
Factory inspection
Type inspection
Marking, packaging, storage
Environmental condition test
Performance calibration test
Insulation strength
Shell protection test
Each torque meter shall be fixed with a copper product label in an appropriate and eye-catching position. The product label shall indicate: product name;
b. Product model;
Manufacturer name;
Factory number and date of manufacture.
7.2 Packaging
7.2.1 The packaging of torque meter products shall comply with the provisions of ZBY003, and the protection type shall be I. 7.2.2 The product packaging indication shall comply with the provisions of GB191. 7.2.3 The technical documents accompanying the torque meter package include: a. Product certificate;
b. Packing list;
c. Instruction manual;
d. Spare parts list.
7.3 Storage
Power supply voltage
7.3.1 The torque meter and accessories should be stored in a dry, ventilated warehouse without corrosive gas and not exposed to direct sunlight under the original packaging conditions of the manufacturer.
7.3.2 Within 18 months from the date of shipment from the manufacturer, if the user fully complies with the storage, installation and use rules stipulated in this standard and the manufacturing instructions, the manufacturer shall repair or replace the instrument free of charge if it is found that the instrument does not meet the requirements of this standard. Additional notes:
This standard is proposed and managed by the National Technical Committee for Standardization of Marine Machinery. This standard is drafted by the 704th Institute of the 7th Institute of China State Shipbuilding Corporation. The main drafters of this standard are Shang Weilu and Qian Shunzhang. 5
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www.3x888.comInstruction manual;
d. Spare parts list.
7.3 Storage
Power supply voltage
7.3.1 The torque meter and accessories should be stored in a dry, ventilated warehouse without corrosive gas and not exposed to direct sunlight under the original packaging conditions of the manufacturer.
7.3.2 Within 18 months from the date of shipment from the manufacturer, if the user fully complies with the storage, installation and use rules stipulated in this standard and the manufacturing instructions, the manufacturer shall repair or replace the instrument free of charge if it is found that the instrument does not meet the requirements of this standard. Additional notes:
This standard was proposed and coordinated by the National Technical Committee for Standardization of Marine Machinery. This standard was drafted by the 704th Institute of the 7th Institute of China State Shipbuilding Corporation. The main drafters of this standard are Shang Weilu and Qian Shunzhang. 5
Standards data collector www.17bzW.cn Yiqi Standard Network provides free download of 100,000 standard books and materials. You can type and quickly build a website in 5 minutes. www.17jzw.com Yiqi website building network provides free website building platform, commercial website 1 year only 60 yuan/ww.17bzw.cn
/ww.17jzw.net
www.3x888.comInstruction manual;
d. Spare parts list.
7.3 Storage
Power supply voltage
7.3.1 The torque meter and accessories should be stored in a dry, ventilated warehouse without corrosive gas and not exposed to direct sunlight under the original packaging conditions of the manufacturer.
7.3.2 Within 18 months from the date of shipment from the manufacturer, if the user fully complies with the storage, installation and use rules stipulated in this standard and the manufacturing instructions, the manufacturer shall repair or replace the instrument free of charge if it is found that the instrument does not meet the requirements of this standard. Additional notes:
This standard was proposed and coordinated by the National Technical Committee for Standardization of Marine Machinery. This standard was drafted by the 704th Institute of the 7th Institute of China State Shipbuilding Corporation. The main drafters of this standard are Shang Weilu and Qian Shunzhang. 5
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www.3x888.com
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