Analysis of Design Considerations for Benchtop Centrifuges
Release time:
2016-01-14
Overview:
Desktop centrifuge
Generally in Desktop centrifuge In the design, both active and passive vibration reduction are applied simultaneously. For high-speed benchtop centrifuges, vibration reduction can generally be considered at three key locations: the spindle bearing housing should be designed with a flexible vibration-damping structure; the spindle should be connected to the motor via a flexible coupling; and the entire drive system should be flexibly connected to the machine frame. Rubber vibration dampers typically suffice to meet the vibration-reduction requirements of high-speed benchtop centrifuges. Given a fixed damper structure, the higher the rubber hardness, the higher the system’s critical rotational speed will be. If the damper hardness is too low, its strength may fail to meet the required standards, making it prone to damage. This equipment can continuously perform processes such as feeding, separation, washing, and discharging even at full operating speeds. It features continuous operation, smooth running, simple operation, large production capacity, excellent washing performance, and low moisture content in the filter cake. It is suitable for separating suspensions containing solid particles larger than 0.1 mm in size and with concentrations exceeding 40%. This equipment is particularly well-suited for industries such as chemical engineering, fertilizer production, alkali manufacturing, and salt production, especially for solid-liquid separation applications involving ammonium bicarbonate, ammonium chloride, mirabilite, and acid washing of cotton seeds.
The desktop centrifuge features an optimized pre-cooling program: Through extensive testing, the optimal rotor rotation speed has been determined for specific models and particular rotors, ensuring both the highest efficiency of cold-air convection and minimizing heat generation from rotor-air friction, thereby achieving maximum cooling efficiency. Measured data show that in the first stage of pre-cooling, the centrifuge chamber takes about 6 minutes to cool down from room temperature (25℃) to 4℃, significantly saving time. However, at this point, the actual rotor temperature remains above 4℃.
The temperature of the centrifuge chamber in a desktop centrifuge can typically be lowered below zero degrees Celsius. The rotational speed generally does not exceed 4,000 rpm, and the maximum capacity ranges from 2 to 4 liters. This type of centrifuge is most commonly used in laboratories for large-scale primary separation and extraction of biomacromolecules, precipitates, and other substances. Its rotors are predominantly made of aluminum alloy and come in two types: swinging-bucket and angle-type. Centrifuge tubes are available in various models, including hard glass, rigid polyethylene plastic, and stainless steel. Desktop centrifuge Equipped with a drive motor, timer, regulator (speed indicator), and refrigeration system (with an adjustable temperature range of -20 to +40℃), the device allows for the replacement of rotors with different capacities and speeds according to the requirements of the centrifuged material.
A desktop centrifuge is a sample-analysis and separation instrument that integrates multiple technologies—including mechanical, electronic, refrigeration, vacuum, and materials engineering—into one device. It is widely used in fields such as biomedicine, petrochemicals, agriculture, and food hygiene. The centrifuge leverages the differences in sedimentation rates of various substances under the influence of centrifugal force to achieve sample analysis and separation. Since its introduction, the desktop centrifuge has undergone significant evolution—from low-speed to high-speed and then to ultra-high-speed models. This progress has primarily been driven by advancements in both centrifuge equipment and centrifugation technology, which complement each other closely. At the end of the 1970s, the application of frequency-conversion speed-control technology in ultra-high-speed desktop centrifuges greatly simplified their structural design and significantly extended their service life. After the 1980s, microcomputer technology became increasingly prevalent in desktop centrifuges, further enhancing their functionality and broadening their range of applications.
The centrifuge features an independently configured control and display module for centrifugal parameters, eliminating the previous method of using up, down, left, and right keys to move the cursor back and forth for setting and modifying parameters. Now, you can simply touch the centrifuge parameter module directly (including the TEMP, SPEED, and TIME keys on the front of the display, as well as the Precooling, Flashing, and ACCEL/DECEL keys) for even more convenient parameter setting. The functional modules can be switched quickly. The knob on the desktop centrifuge serves as both an adjustment knob and a function key. Pressing it toggles between two sets of parameters; when the indicator light corresponding to a particular function module illuminates, it means that function has been activated. Rotating the knob clockwise adjusts the parameter values. The acceleration and deceleration curves can be set intuitively: Since a fixed-angle rotor is installed, in most cases you can simply set the fastest possible acceleration and the fastest possible deceleration. Desktop centrifuge Save experimental time.
The desktop centrifuge features an optimized pre-cooling program: Through extensive testing, the optimal rotor rotation speed has been determined for specific models and particular rotors, ensuring both the highest efficiency of cold-air convection and minimizing heat generation from rotor-air friction, thereby achieving maximum cooling efficiency. Measured data show that in the first stage of pre-cooling, the centrifuge chamber takes about 6 minutes to cool down from room temperature (25℃) to 4℃, significantly saving time. However, at this point, the actual rotor temperature remains above 4℃.
The temperature of the centrifuge chamber in a desktop centrifuge can typically be lowered below zero degrees Celsius. The rotational speed generally does not exceed 4,000 rpm, and the maximum capacity ranges from 2 to 4 liters. This type of centrifuge is most commonly used in laboratories for large-scale primary separation and extraction of biomacromolecules, precipitates, and other substances. Its rotors are predominantly made of aluminum alloy and come in two types: swinging-bucket and angle-type. Centrifuge tubes are available in various models, including hard glass, rigid polyethylene plastic, and stainless steel. Desktop centrifuge Equipped with a drive motor, timer, regulator (speed indicator), and refrigeration system (with an adjustable temperature range of -20 to +40℃), the device allows for the replacement of rotors with different capacities and speeds according to the requirements of the centrifuged material.
A desktop centrifuge is a sample-analysis and separation instrument that integrates multiple technologies—including mechanical, electronic, refrigeration, vacuum, and materials engineering—into one device. It is widely used in fields such as biomedicine, petrochemicals, agriculture, and food hygiene. The centrifuge leverages the differences in sedimentation rates of various substances under the influence of centrifugal force to achieve sample analysis and separation. Since its introduction, the desktop centrifuge has undergone significant evolution—from low-speed to high-speed and then to ultra-high-speed models. This progress has primarily been driven by advancements in both centrifuge equipment and centrifugation technology, which complement each other closely. At the end of the 1970s, the application of frequency-conversion speed-control technology in ultra-high-speed desktop centrifuges greatly simplified their structural design and significantly extended their service life. After the 1980s, microcomputer technology became increasingly prevalent in desktop centrifuges, further enhancing their functionality and broadening their range of applications.
The centrifuge features an independently configured control and display module for centrifugal parameters, eliminating the previous method of using up, down, left, and right keys to move the cursor back and forth for setting and modifying parameters. Now, you can simply touch the centrifuge parameter module directly (including the TEMP, SPEED, and TIME keys on the front of the display, as well as the Precooling, Flashing, and ACCEL/DECEL keys) for even more convenient parameter setting. The functional modules can be switched quickly. The knob on the desktop centrifuge serves as both an adjustment knob and a function key. Pressing it toggles between two sets of parameters; when the indicator light corresponding to a particular function module illuminates, it means that function has been activated. Rotating the knob clockwise adjusts the parameter values. The acceleration and deceleration curves can be set intuitively: Since a fixed-angle rotor is installed, in most cases you can simply set the fastest possible acceleration and the fastest possible deceleration. Desktop centrifuge Save experimental time.
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