Torque Professional Sample

Torque is a special moment that makes an object rotate. It is equal to the product of the force and the force arm. The international unit is N m. The magnitude of the change in torque is important information about the operating conditions of mechanical power equipment.

The National Defense Science and Technology Industrial High Torque Level 1 Metrology Station (hereinafter referred to as the Torque Station) is the earliest professional institution engaged in the research of torque technology in my country. At present, the torque station has been developed, produced and tested for the equipment of national defense science and technology industry, army and national economic construction, and has carried out all-round and full-life torque value transmission services for the user units, ensuring that the Chinese People's Liberation Army, the national defense science and technology industry system, the national Accuracy of economical construction torque magnitudes.

Business segments

Torque metering

Calibration capability

Detection capability

Non-standard test

Electric, pneumatic and hydraulic bolt torque tightening test; various types of ship torque, power test and torsional vibration test; various types of torque testing machines; exploration equipment, oil drilling, wind power, hydraulic motors, and various types of pump drive torque and power testing ; Stress and strain field test.

Training and technical consulting services

Measurement basic knowledge training, torque measurement related standards and specifications training, uncertainty evaluation training, torque standard device construction work training, torque product operation and maintenance training, organization of torque measurement technical exchange activities or meetings, torque measurement technical consultation service etc.

Featured Measurement Capability

1. Large torque/super torque (the only authorized unit for the national torque transmission test in the range above 5kNm)

200kNm torque standard device

● Measuring range: 2kNm~200kNm

● Uncertainty: Urel= 1×10-4 (k=2)

50kNm torque standard device

● Measuring range: 50Nm~50kNm

● Uncertainty: Urel =5×10-4(k=3)

2. Small torque/micro torque (can provide measurement services for static and dynamic torque of key electromagnetic components of inertial navigation systems such as aviation, aerospace, ships, etc., torquers, angle sensors, maglev bearings, locked rotor motors, gyro motors, etc.)

0.5mNm~10Nm Air-floating torque standard device

● Measuring range: 0.5mNm~10Nm

● Uncertainty: Urel=0.05% ~ 0.01% (k = 2)

Micro torque calibration device

● Measuring range: (0.5~10)mNm

● Resolution: 10-7Nm

● Measurement uncertainty: U = 0.1% FS(k = 2)

3. Dynamic torque (standard sinusoidal torque and negative step torque can be provided, the amplitude accuracy and time constant of the torque sensor can be calibrated, and the dynamic torque measurement accuracy can be evaluated. It is mainly used in the power tuning of the ship's combined power system and the ship-class engine. paddle matching)

50Nm dynamic torque test device

● Uncertainty: U=5% (k=2)

Sinusoidal Dynamic Torque Test Device

● Measuring range: -5Nm～5Nm

● Frequency: 1Hz～50Hz

● Measurement uncertainty: U=5% (k=2)

Routine metering capability

Torque Standard Device

● Measuring range: 0.282Nm~30kNm

● Uncertainty: Urel = 3×10-4 ~ 1×10-3 (k=2)

● Measuring range: 2Nm~200Nm/20Nm~5kNm

● Uncertainty: Urel =5×10-5(k=2)

Standard Torque Meters/High Accuracy Torque Transducers and Measuring Instruments

● 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

Specification：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

Specification：10Nm/100Nm/200Nm/1kNm/2kNm/5kNm/10kNm/20kNm

Level: Level 0.03/Level 0.05/Level 0.1/Level 0.3

Remarks: Other specifications can be customized according to customers

Reference torque standard device

Specification：10Nm/100Nm/200Nm/1kNm/2kNm/5kNm/10kNm/20kNm

Level: Level 0.03/Level 0.05/Level 0.1/Level 0.3

Remarks: Other specifications can be customized according to customers

Multifunctional Torque Calibration Device

Specification：20kNm/50kNm/80kNm

Level: Level 0.3

Uses: used to calibrate hydraulic wrenches, pneumatic wrenches and multipliers, etc.

Remarks: Other specifications can be customized according to customers

Torque Wrench Tester

Specification：200Nm/1kNm/3kNm/5kNm

Level: Level 0.3

Data collection method: automatic/manual

Remarks: Other specifications can be customized according to customers

遥测功率仪
Military telemetry power meter	Civil 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 train speed, torque and power testing

Client: China Ordnance North Engine Research Institute (70)

The valve train consumes energy as a load in actual work. In the product design stage, the power consumption is only simulated and calculated, but no actual verification is carried out. Through the technical means of monitoring the actual power in the bench test, the design results are verified and optimized.

Shaft power test case 2:

Thrust start-up speed, torque and power tests

Client: Rolls-Royce

The side thruster is driven by a motor, and the starting method is a star-turn-delta. During the use process, the problem of the gear knocking of the intermediate gearbox and the increase of the gear gap and the abnormal noise often occur. By monitoring the speed, torque and power of the motor output shaft during the starting process, it was found that there was a large impact torque on the shaft system when the starting mode was switched, which is very likely to cause the above phenomenon, thus finding the root cause of the equipment failure.

Structural stress test case 1:

Strain test of super large fin stabilizer actuator prototype loading test

Client: Anti-roll Device Division

The actuator of the fin stabilizer is the key to the comfortable operation of the ship, and safety and reliability are important considerations. In the bench test of the actuator, the stress change after loading is monitored by pasting resistance strain gauges on the key sensitive parts. Verify the design strength to ensure the reliable operation of the equipment.

Structural stress test case 2:

Propeller hub static loading test stress test

Client: Controlled Pitch Propeller Unit

The controllable pitch propeller device is the output part of the ship's power, and the propeller hub is an important component. How to optimize the design has always been a major concern of designers. In the propeller hub bench test, the design strength is verified by pasting resistance strain gauges on key sensitive parts to monitor the stress change after loading.

Shaft torsional vibration test case:

Torsional vibration test of diesel generator set shafting

Client: Generating Unit Installation Division

During the operation of the diesel engine, there is a certain degree of non-uniformity in the rotation of the shafting, which causes torsional vibration of the shafting. If the vibration amplitude exceeds a certain value, the safety and transmission efficiency of the shafting will be affected. Before the diesel generator set leaves the factory, by monitoring the torsional vibration of the shaft system, it can be judged whether the torsional vibration of the generator set is within the design range.

Non-standard customized device case 1:

The 2-ton balance is the national benchmark of the China Institute of Metrology and is used for the traceability of weights. The device adopts the form of a knife-edge support and a weight-loaded structure. The whole device has exquisite appearance, high degree of automation, high measurement accuracy, and is internationally leading.

Non-standard customized device case 2:

The weight handling device is used for automatic calibration of weights. The automatic weight handling method replaces the traditional manual handling method, which greatly reduces the workload of the staff, has a high degree of automation, and improves the weight calibration efficiency.

User units