I. Problem Overview
In industrial applications, air motors serve as power output devices and are widely used in production environments requiring stable power. However, in actual operation, startup failures are frequently encountered, affecting work efficiency and equipment lifespan. This document will provide an in-depth analysis of two common issues: "Activation of Internal Safety Interlock Mechanism" and "Abnormal Fuel Valve Startup Mechanism", along with specific diagnostic and response measures to ensure smooth equipment operation.

II. Problem Analysis and Solutions

1. Startup Failure Due to Activation of Internal Safety Interlock Mechanism
(1) Causes of the Issue
The internal safety interlock mechanism is a protective device designed to prevent equipment startup under unsafe conditions. When this mechanism is activated, the motor will fail to start normally. Common causes include:

1.The operator has not correctly adjusted the startup switch, causing the system to misinterpret the status as "not ready."
2.The internal safety device detects an anomaly, such as insufficient pressure or an incompletely opened valve.
3.The system encountered an anomaly in the previous operation and failed to automatically reset to an operational state.

(2) Solutions
1.Confirm the Position of the Startup Switch
a.Check the control panel to ensure the startup switch is turned to the "RUN" position.
b.Some equipment may have additional safety switches; confirm that all switches are in the startup position.

2.Check the Status of the Interlock Mechanism
a.Verify whether the system display indicates activation of the interlock mechanism.
b.If the interlock mechanism is activated, identify possible triggers, such as malfunctioning pressure sensors or safety valves.

3.Manually Reset the Interlock Mechanism
a.If the system does not automatically deactivate the interlock, try a manual reset.
b.Follow the equipment manual to perform a safe reset procedure, such as pressing the reset button or performing a power cycle.

4.Regular Maintenance and Inspection
Periodically check the condition of the safety mechanism to ensure that the interlock system does not malfunction due to dust accumulation or component wear.

2. Abnormal Fuel Valve Startup Mechanism Leading to Flywheel Rotation Without Ignition
(1) Causes of the Issue
The fuel valve startup mechanism controls fuel flow during startup, ensuring smooth ignition and operation of the motor. When this mechanism malfunctions, the flywheel may rotate without ignition. Possible causes include:

1.Insufficient fuel supply or low pressure preventing the fuel valve from opening properly.
2.Internal blockage or damage to the fuel valve, hindering effective fuel control.
3.Malfunction of the fuel valve control system (e.g., solenoid valve failure) preventing command transmission.

(2) Solutions
1.Check Fuel Pressure
a.Use a pressure gauge to measure fuel pressure, ensuring it remains above 3-5 kg/cm².
b.If pressure is insufficient, inspect the fuel supply pipeline for blockages and increase fuel pressure accordingly.

2.Inspect the Fuel Valve Mechanism
a.Check for carbon buildup, dirt, or foreign objects obstructing the fuel valve.
b.If the fuel valve is stuck, clean it with a specialized cleaner or replace damaged components.

3.Repair the Fuel Valve Startup Mechanism
a.Check whether the solenoid valve operates normally and if there is an input electrical signal.
b.If the solenoid valve is faulty, replace it promptly to ensure the fuel valve can open properly.
c.Test manual control of the fuel valve—if fuel supply resumes upon manual opening, the issue may lie in the electronic control system.

4.Regular Maintenance and Inspection
a.Periodically clean the fuel valve and its control mechanism to prevent carbon buildup and impurities from affecting operation.
b.Install a fuel filter in the pipeline to reduce impurities' impact on the fuel valve.

III. Conclusion and Recommendations
Air motor startup failures are typically related to safety interlock mechanisms and abnormal fuel valve startup mechanisms. To ensure stable equipment operation, it is recommended that companies implement the following measures:

1.Regular Inspection: Check the interlock mechanism and fuel supply system regularly to detect potential issues early.
2.Standardized Operation: Train operators to use equipment correctly, ensuring proper settings for switches and safety mechanisms.
3.Maintenance and Upkeep: Establish an equipment maintenance plan, clean and replace vulnerable components, and reduce failure rates.

By implementing these measures, companies can effectively reduce the risk of air motor startup failures and enhance operational efficiency and stability.