Variable Displacement Compressor Test Machine with Universal Chuck
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Solution Overview
Problem
Conventional variable displacement compressor test machines are limited in their ability to test various kinds of compressors with different pulley diameters and groove configurations, as they are typically designed for specific compressor types.
Innovation Solution
A functional test machine for variable displacement compressors that includes a stand, a chuck device with three claws to hold the compressor, a control panel with pressure gauges, and a control valve device to control air flow, allowing for the testing of compressors with different dimensions and configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a test machine is designed for a specific compressor type, then the testing precision for that compressor is improved, but the adaptability to test different compressors deteriorates
Solution Approach 1:
The test machine incorporates a universal chuck device with adjustable claws that can accommodate compressors with different pulley diameters and groove configurations. The control panel includes multiple pressure gauges (crankcase pressure, discharge pressure, suction pressure) that can measure various pressure conditions across different compressor types, enabling a single machine to test multiple compressor variants effectively
2Ease of operation
If a chuck device with fixed claws is used, then the ease of operation is improved, but the adaptability to hold different compressor sizes deteriorates
Solution Approach 1:
The chuck device features adjustable claws that can be positioned at different radial distances from the center to accommodate pulleys of various diameters. This dynamic adjustment capability allows the same chuck device to securely hold compressors with different pulley sizes while maintaining ease of operation through a standardized adjustment mechanism
3Measurement precision
If a control valve device is added to control air flow, then the measurement precision of pressure conditions is improved, but the device complexity increases
Solution Approach 1:
The control valve device acts as an intermediary component between the air source and the pressure gauges. It includes a tubular member with a passage that can be selectively opened or closed by a valve member, allowing precise control of air flow to each pressure gauge. This intermediary mechanism enables accurate measurement of different pressure conditions without requiring complex electronic control systems
Data Source
AI summary
A functional test machine for a variable displacement compressor includes a chuck device supported on a stand for grasping a variable displacement compressor, a crankcase pressure (Pc) gauge, a discharge pressure (Pd) gauge, and a suction pressure (Ps) gauge supported on a control panel of a table and connected to the compressor, and a control valve device includes a passage formed in a tubular member and coupled to the discharge pressure (Pd) gauge, and a valve member disposed in the tubular member for controlling an air flowing through the passage of the tubular member. The chuck device includes three claws for holding the compressor.