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The non-driven side motor assembly of the Atlas Copco oil-injected screw compressor is the part of the motor that is separated from the connection end of the compressor main body. Although it does not directly participate in power transmission, its structure and performance are of vital importance to the overall operational stability, heat dissipation effect, and safety of the equipment of the motor.

Atlas Copco 2907012200，Load the solenoid valve, which is usually a two-position three-way normally closed valve. When powered on, it allows compressed air to enter the cylinder pipe of the intake valve from the oil-gas tank, opening the intake port; when powered off, it cuts off the air path and discharges the air in the cylinder, closing the intake port. Release the solenoid valve, which is mostly a two-position two-way normally open valve. When the air compressor is unloaded or shut down, it is powered off, releasing the gas in the oil-gas tank to the intake filter to ensure that the system pressure drops to the safe range. Pressure relief and start-up protection: In small air compressors, the solenoid valve connects the cylinder outlet to the outside when the machine is shut down to release residual pressure and prevent overload due to the motor starting under load; when starting, it closes the pressure relief channel to allow compressed air to be normally filled into the air tank.

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Its core features typically include: An air-driven design, suitable for working conditions that require high power output and have a demand for portability, especially in environments without power supply or where explosion prevention is necessary. 15 may represent parameters related to specifications, such as the diameter of the grinding wheel (e.g. 150mm), which should be referred to in the product manual. It usually has an ergonomic handle to reduce fatigue during long operations. It may be equipped with adjustable speed function or safety locking device to enhance operational safety and flexibility.

Working Principle Torque Transmission: The torque output by the motor is transmitted through the outer teeth of the coupling, and then via the inner teeth of the intermediate sleeve to the compressor shaft, achieving power transmission. Flexible Compensation: Axial Offset: The axial clearance between the inner and outer teeth allows for a small amount of axial displacement of the two shafts (typically ±0.5 to ±3mm). Radial Offset: The top of the outer teeth is made into a spherical shape (with the center of the sphere on the axis), allowing for a certain angular deviation between the two shafts (typically ≤1°). Angular Offset: Through the sliding and rolling of the tooth surfaces, the angular errors between the two shafts are compensated. Buffering and Vibration Reduction: The lubricating oil fills between the teeth and can absorb some vibration and impact loads, reducing equipment noise.

The original Atlas Copco air filter maintenance kit has been rigorously tested in terms of filtration efficiency, dust holding capacity, and structural strength, and is perfectly matched with the equipment design. It can maximize the filtration effect. Non-original filter elements may have issues such as insufficient filtration accuracy, excessive intake resistance, or poor sealing. Long-term use may lead to accelerated wear of the main unit, increased energy consumption, and ultimately increase the maintenance cost of the equipment.