To detect the vibration of the base of the NGW61-3.15 planetary gear reducer, you can select instruments according to the idea of basic measurement → precise analysis → auxiliary verification . Priority is given to testing equipment that is suitable for the on-site working conditions of the reducer and is highly portable. The details of various tools are as follows:
1. Basic measurement category: vibration core detection equipment (direct collection of vibration parameters)
Portable handheld vibration meter (vibration pen) is the most common testing instrument on site. It can directly obtain the effective value of vibration speed (mm/s), vibration acceleration and displacement data of the reducer base. The measurement results can be compared with the GB/T 29531 specification to determine whether it exceeds the standard. The equipment is easy to operate and suitable for quick on-site inspections and preliminary vibration assessments.
The online vibration sensor supporting data collector is suitable for long-term continuous monitoring of equipment. The piezoelectric acceleration sensor is fixed on the bearing seat and foot of the machine base to continuously collect vibration signals; the supporting collector can store historical data, track vibration trends, and provide timely warnings if abnormal vibration fluctuations occur.
2. Precision analysis category: vibration fault diagnosis equipment
Spectrum analyzer is used for in-depth investigation of the root causes of vibration. By analyzing the vibration spectrum signal, we can extract information such as gear meshing frequency and bearing characteristic fault frequency, distinguish the vibration inducements, and determine whether the fault originates from the machine base body, internal transmission parts, or assembly defects. It is suitable for handling difficult problems such as excessive vibration.
3. Auxiliary verification: supporting detection tools to investigate related influencing factors
The laser alignment instrument detects the coaxiality of the input and output shafts of the reducer and the installation deviation of the coupling. Shaft alignment error is a common cause of machine base vibration. This device can be used to verify whether the vibration is caused by assembly misalignment.
The dial indicator/level detects the flatness of the machine base installation plane and the roundness of the bearing seat hole, and determines whether there is deformation of the machine base. The deformation of the machine base will cause uneven force, thereby stimulating vibration. This tool is used to verify the geometric state of the machine base body.
Use a torque wrench to retest the tightening torque of the anchor bolts to prevent vibration caused by loose bolts and to confirm whether the vibration problem is related to the fixed installation status of the equipment.
The infrared thermometer detects the temperature rise on the surface of the machine base and the bearing seat area. Abnormal vibration is often accompanied by local heating. Temperature data can be used to help determine whether the vibration is caused by parts friction, stuck operation and other faults.
Scenario Selection suggestions
Daily inspections: Priority is given to the use of portable handheld vibrometers, which are portable and efficient and meet the requirements for routine vibration index detection.
In-depth troubleshooting: Use a spectrum analyzer + laser alignment instrument in combination to accurately locate the root cause of vibration, such as poor gear meshing, misalignment of the shaft system, etc.
Long-term online monitoring: Deploy online vibration sensors + data collectors to monitor vibration trends in real time and identify potential equipment hazards in advance.
