Torque professional sample
Torque is a special moment that causes an object to rotate, which is equal to the product of force and lever arm, and the international unit is N:m. The change in torque is an important information about the operating status of mechanical power equipment.
The National Defense Science and Technology Industry Large Torque Level 1 Metrology Station (hereinafter referred to as the Torque Station) is the earliest professional institution in my country to engage in torque technology research. For a long time, it has been providing measurement, testing and product services for weapons and equipment. It has a history of more than 40 years. Now, the Torque Station has been engaged in equipment development, production, testing for the national defense science and technology industry, troops and national economic construction, and has carried out all-round and full-life torque value transmission services for the user units to ensure the accuracy of the torque value of the Chinese People's Liberation Army, the national defense science and technology industry system, and the national economic construction.
Business Segments
Torque measurement
Calibration capability
| Serial number | Product/category | Item/parameter | Calibration standard (regulation/specification) |
| 1 | Torque standard machine | Torque | Torque standard machine (JJG769-2009) |
| 2 | Torque wrench calibrator | Torque sample | Torque wrench calibrator (JJG797-2013) |
| 3 | Torque speed measuring device/torque meter | Torque | Torque speed measuring device (JJG924-2010) |
| Speed | Static torque measuring instrument (JJG995-2005) | ||
| 4 | Torque wrench | Torque | Torque wrench (JJG707-2014) |
| 5 | Standard torque meter | Torque | Standard torque meter (JJG557-2011) |
| Serial number | Product/category | Item/parameter | Calibration standard (regulation/specification) |
| 1 | Torque wrench | torque | manual torque board general technical conditions (GB/T15729-2008) |
| 2 | Various test benches for ship main engine and power system | Speed | Ship shaft power test method (GJB2584-1997) |
| Torque | |||
| Power | |||
| 3 | Torque meter | Torque | Ship telemetry torque meter (CB3410-1991) |
| Speed | |||
| Insulation strength | |||
| 4 | Torque speed sensor | Static calibration error | Torque speed sensor (JBIT6876-1993) |
| Sleeve error | |||
| Angular error | |||
| Maximum torque | |||
| Insulation resistance |
Non-standard tests
Electric, pneumatic, hydraulic bolt torque tightening test; various ship torque, power test and vibration test; various types of phase torque test machines; exploration equipment, oil drilling, wind power, wave pressure motor, and various pump transmission torque, power test; stress, strain field test.
Training and technical consulting services
Basic metrology knowledge training, torque metrology related standards and specifications training, uncertainty assessment training, standardization work training for torque standard devices, operation and maintenance training for torque products, organization of torque metrology technology exchange activities or meetings, torque metrology technology consulting services, etc.
Specialized metrology capabilities
1. Large torque/ultra-large torque (the only authorized unit for national torque measurement and verification of the range above 5kNm)
200kNm torque standard device
Measuring range: 2kNm~200kNm
Uncertainty: Urel= 1x10-4(k=2)
50kNm torque standard device
Measurement range: 50Nm~50kNm
Uncertainty: Urel =5x10-4(k=3)
2. Small torque, micro torque (can provide measurement services for static and dynamic torque of key electromagnetic components of inertial navigation systems of weapons and equipment such as aviation, aerospace, and ships, such as torquers, angle sensors, magnetic bearings, stalled motors, gyro motors, etc.)
0.5mNm~10Nm air-floating torque standard device
Measurement range: 0.5mNm~10Nm
Uncertainty: Urel=0.05%~0.01%(k=2)
Micro torque calibration device
Measurement range: (0.5~10) mNm
Resolution: 10-7Nm
Measurement uncertainty: U=0.1% FS(k=2)
3. Dynamic torque (can provide standard sine torque and negative step torque, calibrate the amplitude accuracy and time constant of the torque sensor, and realize the dynamic torque measurement accuracy evaluation, mainly used in the power setting of the ship's combined power system and the matching of the ship's class engine award!
50Nm dynamic torque test device
Uncertainty: U=5%(k=2)
Sinusoidal dynamic torque test device
Measurement range: -5Nm~5Nm
Frequency: 1Hz~50HZ
Measurement uncertainty: U=5%(k=2)
Conventional measurement capabilities
Torque standard device
Measurement range: 0.282Nm~30kNm
Uncertainty: Urel=3x10-4~1x10-3(k=2)
Measuring range: 2Nm-200Nm/20Nm~5kNm
Uncertainty: Urel =5x10-5(k=2)
Standard torque meter/high accuracy torque sensor and measuring instrument Measuring range: 10mNm~50kNm/0.02Nm-50kNm Uncertainty: U=0.1%(k=2)/U=0.03%(k=2)
Torque standard machine
| High-precision torque standard machine |
 |
| Specifications: 1Nm/10Nm/100Nm/200Nm/500Nm/1kNm/2kNm/5kNm/10kNm/20kNm |
| Grade: better than 0.005% (k=2) |
| Remarks: Other specifications can be customized according to customers |
| Conventional torque standard device |
 |
| Specifications: 10Nm/100Nm/200Nm/1kNm/2kNm/5kNm/10kNm/20kNm |
| Grades: 0.03, 10.05, 10.1, 10.3 |
| Remarks: Other specifications can be customized according to customers |
| Reference torque standard device |
 |
| Specifications: 10Nm/100Nm/200Nm/1kNm/2kNm/5kNm/10kNm/20kNm |
| Grades: 0.03, 0.05, 0.1,0.3 |
| Remarks: Other specifications can be customized according to customers |
| Multifunctional torque calibration device |
 |
| Specifications: 20kNm/50kNm/80kNm |
| Grade: 0.3 |
| Purpose: used to calibrate hydraulic wrenches, pneumatic wrenches and multipliers, etc. |
| Remarks: Other specifications can be customized according to customers |
| Torque wrench tester |
 |
| Specifications: 200Nm/1kNm/3kNm/5kNm |
| Grade: 0.3 |
| Data collection method: automatic/manual |
| Remarks: Other specifications can be customized according to customers |
| Telemeter power meter | |
 |
 |
| Military telemeter power meter | Civilian shaft power meter |
| Maximum allowable error: ±0.5%FS | |
| Speed: (300-500)r/min | |
| Remarks: Other specifications can be customized according to customers | |
Solution
Shaft power test case 1:
Valve mechanism speed, torque and power test
Customer: China North Engine Research Institute (70th Institute)
The valve mechanism consumes energy as a load in actual work. During the product design stage, only the power consumption was simulated and calculated without actual verification. The design results were verified and optimized by monitoring the actual power in the bench test.
Shaft power test case 2:
Thruster start speed, torque and power test
Customer: Rolls-Royce
The thruster is driven by a motor, and the start mode is star-turn two-angle. During use, the intermediate gearbox gears often knock, the gear spacing increases, and then abnormal noises occur. By monitoring the speed, torque and power of the motor output shaft during the start process, it is found that the shaft system has a large impact torque when the start mode is changed. This impact torque is very likely to cause the above phenomenon, thus finding the root cause of the equipment failure.
Structural stress test case 1:
Super-large fin stabilizer actuator prototype loading test strain test
Customer: Stabilizer Division
The fin stabilizer actuator is the key to the comfortable operation of the ship. Safety and reliability are important considerations. In the actuator bench test, resistance strain gauges are pasted on key sensitive parts.
Monitor the stress changes after loading, thereby verifying the design strength and ensuring the reliable operation of the equipment.
Structural stress test case 2
Stress test of hub static loading test
Customer: Controllable pitch propeller device division
The controllable pitch propeller device is the output part of the ship power, and the hub is an important part. How to optimize the design has always been a major issue of concern to designers. In the hub bench test, resistance strain gauges are attached to key sensitive parts to monitor the stress changes after loading, so as to verify the design strength.
Shaft torsional vibration test case
Diesel generator set shaft torsional vibration test
Customer: Generator unit division
During operation, the shaft rotation of the diesel engine is uneven, which causes shaft torsional vibration. When the vibration amplitude exceeds a certain value, it will affect the shaft safety and transmission efficiency. Before the oil-dyed generator set leaves the factory, by monitoring the oil torsional vibration, it can be determined whether the torsional vibration of the unit is within the design range.
Case 1 of Non-standard customized device
The 2-ton balance is the national standard of the Chinese Institute of Metrology and is used for the traceability of weights. The device adopts a knife-edge support and weight loading structure. The whole device has a delicate appearance, a high degree of automation, high measurement accuracy, and is internationally leading.
Case 2 of non-standard customized device
The weight handling device is used for automatic calibration of weights. It adopts the form of automatic weight handling instead of the traditional manual handling method, which greatly reduces the workload of staff, has a high degree of automation, and improves the efficiency of weight calibration.
Partners
