05,07,2026 40 views
High-speed centrifuges can reach rotational speeds exceeding 10,000 rpm. In addition to possessing the performance capabilities and structural features of refrigerated centrifuges, the fixed-angle rotors utilized in high-speed centrifuges are typically fabricated from titanium alloy or aluminum alloy. The centrifuge tubes used are rigid polyethylene vessels equipped with caps. These types of centrifuges are primarily employed for the collection of microorganisms, cellular debris, intact cells, large organelles, sulfate precipitates, and immunoprecipitates. So, what are the constituent components of a high-speed centrifuge?
1. **Housing:**
The housing assembly consists of various components, including the front and rear panels, left and right side panels, the top panel, the base plate, and four casters. The exterior surface of the machine is finished with a spray coating of dark gray enamel paint. The rear, left, and right panels are detachable; the top panel features a cover plate for the centrifuge chamber, while a control box and display panel are situated at the rear of this cover plate.
The control panel is equipped with various control switches, buttons, and instrumentation for display and adjustment. The Start button controls the power supply and initiates the operation of selected functions; the Time Control knob works in conjunction with the built-in timer to preset and regulate the centrifuge's run duration; pressing the Brake button initiates a rapid deceleration to a stop; and the Refrigeration button controls the activation and deactivation of the cooling unit. In addition to these functional buttons, the panel also features a rotational speed display meter and a temperature adjustment indicator.
2. **Centrifuge Chamber:**
The centrifuge chamber (or rotor chamber) is a cylindrical cavity housing a rotor capable of accommodating six centrifuge tubes. The inner wall of the centrifuge chamber is constructed from stainless steel plating. Cooling coils are fitted tightly against the inner wall to facilitate the reduction of the chamber's internal temperature. An insulation layer is situated between the inner and outer walls of the chamber; this layer is packed with thermal insulation materials, such as rigid foam plastic or sponge.
3. **High-Speed Transmission Unit:**
The high-speed transmission unit is a speed-changing mechanism coupled directly to the motor's main shaft. Its installation involves placing the transmission unit's mounting frame onto the base plate of the centrifuge chamber, followed by securely fastening it to the base plate using mounting bolts. The horizontal rotor is then removed from the motor's main shaft, and the drive disc is installed in its place. Ensure that a specific amount of lubricating oil is poured into the bushing of the motor spindle (drive shaft) to prevent the occurrence of a sharp whistling sound caused by dry friction during high-speed operation.
The speed-regulating shaft of the high-speed speed regulator must be inserted vertically into its bushing and secured in place using the anti-dislodgement hook. Connect the large disc on the motor spindle to the speed-regulating shaft using a drive belt, then use a tensioning wrench to tighten the belt. Finally, mount the fixed-angle rotor onto the speed-regulating shaft; the installation of the entire high-speed regulator is now complete. Before use, carefully inspect all moving parts for any abnormalities or looseness; if any are found, they must be adjusted and corrected immediately. Centrifugation operations may only commence once it has been verified that there are no abnormalities.
4. Rotors:
The centrifuge is equipped with three different types of rotors. The first is a small aluminum fixed-angle rotor designed for use with the high-speed speed regulator. The second is a horizontal rotor mounted directly onto the motor spindle; this rotor accommodates six large glass test tubes. The third type is a fixed-angle rotor mounted directly onto the motor spindle.
5. Refrigeration System:
The centrifuge's refrigeration system utilizes vapor-compression cooling. This vapor-compression system consists of components such as a compressor, a condenser, an expansion valve, and an evaporator. Its function is to lower the temperature within the centrifuge chamber.
