The installation method of vibration sensors directly affects measurement accuracy, with the core lying in ensuring tight fixation between the sensor and the measured equipment, as well as aligning the installation direction with the direction of the vibration to be measured. Below is a detailed installation guide:

For typical motors connected to other loads via couplings, where the load serves as the vibration source and coupling concentricity issues may arise, the front bearing area of the motor experiences the highest vibration levels. A common approach is to install vibration sensors in both vertical and horizontal directions on the front end cover.

There are three common installation methods for vibration sensors: threaded fixation, magnetic mounts, and adhesive bonding.

To avoid damaging the equipment itself, magnetic mounts are often employed. This involves attaching a magnetic base to the bottom of the vibration sensor, which is then directly adsorbed onto the measured equipment (typically made of cast iron).

To ensure a more secure and firm attachment between the vibration sensor and the equipment, preventing any potential displacement due to prolonged vibration monitoring (or if the equipment installation surface is too narrow), a layer of AB glue can be applied to the surface of the magnetic mount for long-term fixation.

For securing vibration sensors on non-magnetic metal surfaces, an alternative method involves fabricating an installation bracket on the bearing bush and firmly fixing the sensor to it, ensuring close contact with the bearing bush end cover to resolve the issue.

The aforementioned common installation methods are provided for reference only and are not absolute. A comprehensive consideration must be given to factors such as vibration magnitude, measured vibration frequency, installation speed, disassembly speed, and duration of use.

Principles for Selecting Installation Locations

The measurement points should preferably be selected at areas with high structural rigidity of the equipment, such as bearing seats and end covers, to minimize vibration transmission losses. The specific location must be determined based on the type of equipment:

• Motors: For horizontal motors, installation is prioritized in the horizontal direction at the drive end; for vertical motors, installation is prioritized at the non-drive end away from the mounting plane.
• Gear Reducers: For straight-tooth gear reducers, vertical vibration measurement is prioritized; for helical or bevel gear reducers, axial vibration measurement is prioritized.
• Pumps/Fans: For overhung centrifugal machines, vibration measurement in the horizontal direction at the drive end is prioritized.

Installation Direction and Techniques

• Directional Consistency: The vibration measurement direction of the sensor must align with the direction to be measured; otherwise, amplitude errors will occur. For example, when measuring horizontal vibration, the sensor's axial direction should be placed horizontally.
• Operational Techniques:
  1. When using magnetic mounts, tilt the magnetic base towards the surface before adsorption to avoid impact.
  2. When using adhesive bonding, press the sensor vertically to thin the adhesive layer.
  3. After installation, secure the wires to prevent loosening or stress on the connectors.