tubular centrifuge manufacturer

Installation and Operation Instructions

This machine has good anti-interference ability. Accurate installation and strict operation according to these instructions are necessary for stable operation and normal functioning.

3.1 Machine Installation

Unless the machine is fully assembled, do not use belts to connect the motor and drum.

3.1.1 The installation site must be kept away from heavy machinery or impact machinery such as punching, shearing, forging, etc. to avoid vibration and interference.

3.1.2 The machine is fixed on a concrete foundation, which is constructed according to the foundation drawing provided by the manufacturer. The installation position should ensure that there is a passage of at least 1.5 meters in front and on both sides of the machine, with a certain space at the top for easy maintenance and lifting.

3.1.3 When handling and lifting, the drum must be removed first, taking care to prevent damage to machine parts. There is a hanging hole above the machine, and the focus should not be on the machine head, pulley, motor, handle, etc.

3.1.4 For easy installation, the internal components must be properly protected to prevent damage during transportation and lifting.

During the installation of the body, it is necessary to calibrate the levelness at the plane of the machine head, and the unevenness in the two vertical directions should not exceed 0.06mm/m to avoid unilateral wear of the bearings.

3.1.6 The motor should be installed vertically, and the main pulley should be horizontally aligned. The unevenness of the main pulley should not exceed 0.10mm/m.

3.1.7 Rotation of the separator: When viewed from top to bottom, the rotation of the motor pulley is clockwise (indicated by an arrow). When viewed from top to bottom, the compression pulley crank can only rotate counterclockwise, with a rotation angle not exceeding 360 °.

3.1.8 The machine power indicators and power wiring must comply with the nameplate regulations.

3.2 Component Assembly

3.2.1 Drum assembly

The drum is the core component of a centrifuge and must be protected and maintained like a precision instrument.

3.2.1.1 The drum is the core component of the centrifuge, and during disassembly and assembly, it is necessary to carefully inspect the inner and outer walls, mating surfaces, sealing surfaces, and threads of the drum; Check for any damage, foreign objects inside the drum, and cleanliness of the inner and outer surfaces.

3.2.1.2 After separating the drum from the spindle, the upper thread must be threaded with a protective sleeve. The protective sleeve must not be removed unless the spindle is matched and tightened with a connecting nut.

3.2.1.3 Place the drum horizontally on a dedicated bracket, allowing the pins on the bracket to enter the corresponding slots at the bottom of the drum. If there are triangular plates inside the drum, they must be cleaned and pushed parallel into the drum according to the specified markings until the top is fully pushed.

3.2.1.4 If using a triangular plate, it is necessary to check whether the steel wire of the triangular plate is loose, whether the triangular plate is deformed, and whether there are burrs. If using a square plate, it is necessary to check whether the square plate is loose or deformed

3.2.1.5 Check the lower end cover, inspect the sealing ring, bottom mating surface, and screw threads, and ensure that they are clean, intact, and flat. The lining ring of the lower end cap should not be loose or excessively worn. Special tools must be used for replacement, and the fixture should not be too tight during disassembly to avoid damaging the threads.

3.2.1.6 Use a plum blossom wrench and a wooden hammer to tighten the lower end cover onto the drum until the specified markings align. The allowable deviation between the drum markings and the markings on the end cover is ± 10mm (arc length). If it exceeds, the cause must be checked. If there is a problem with the sealing ring, a new sealing ring must be replaced.

3.2.2 Assembly of Lower Bearing

Sliding bearings must be able to move flexibly in all radial directions, and the cleanliness and lubrication of grease must be ensured.

3.2.2.1 Check whether the contact surface between the bearing sleeve and the bearing seat is flat, and whether the sliding bearing is excessively worn. If the wear exceeds 0.8-1mm, the sliding bearing must be replaced.

3.2.2.2 Ensure that the oil pathway is unobstructed, and special No.2 lithium based grease must be used for the oil. The oil cup and grease must be clean and have a normal color.

3.2.2.3 When installing the sliding bearing, align its groove with the positioning pin of the bearing sleeve, push it in by hand, tighten the pin with M8 thread on the bearing sleeve without loosening, and then tighten the sliding bearing cover.

3.2.2.4 Apply lubricating grease to the worn surfaces of the lower part of the installed bearing sleeve and the bearing seat, align the pin with the radial groove of the bearing seat, and then place the compression spring on the upper part.

3.2.2.5 Fix the bearing seat on the vise, screw the outer cover clockwise into the bearing seat, and tighten it with a moon wrench.

3.2.2.6 Check whether the radial movement of the sliding bearing is flexible and the force is evenly applied. After confirming that it is normal, place the sliding bearing in the middle position for visual inspection.

3.2.2.7 Rotate the oil cup cover to allow the lubricating grease to enter the hole of the sliding bearing and flow out.

3.2.2.8 Apply a small amount of lubricating grease on the working surface of the sliding bearing and keep it clean.

3.2.3 Head assembly

Disassembly and assembly of the machine head bearing can only be carried out after familiarizing oneself with the structural performance. When adding lubricating grease to the bearing, do not exceed 75% of the total clearance volume inside the bearing.

3.2.3.1 The main shaft, bearing shaft, shaft sleeve, head cover, bearing sleeve, head housing, etc. must be carefully cleaned before assembly. The cleaning of bearings must be carried out according to the cleaning requirements of precision bearings, and then an appropriate amount of lubricating grease must be added.

3.2.3.2 First, install one bearing on the bearing shaft to the bottom, then install the shaft sleeve and washer in sequence, and finally install the other bearing. Then, fit the bearing into the machine head housing and install the bearing washer and the above components inside. Finally, install the bearing cover and pulley.

3.2.3.3 Clamp the pulley onto the vise, use a T-shaped wrench to tighten the small pulley, then align the cross shaft sleeve with the bearing groove, install it into the coupling sleeve, and fix it.

3.2.3.4 Connect the nut on the spindle sleeve, then pass through the bearing shaft from the lower part of the machine head housing and come out from the upper part of the coupling sleeve. The vibration isolation rubber and gasket are installed from the upper end of the shaft. When installing the horizontal pin, identify the direction and isolate it with soft metal (copper or aluminum) before striking it with a hammer. (Note: The damping rubber should be evenly plugged, and the transverse pin should be in the middle.)

After installation, apply lubricating grease to the lower part of the machine head housing to prevent rusting.

3.2.4 Assembly of belt roller

The assembly of the belt roller components can only be carried out after familiarizing oneself with the structure.

3.2.4.1 Before assembly, bearings, glands, belt rollers, etc. must be carefully cleaned; Apply a small amount of lubricating grease inside the belt roller.

3.2.4.2 Install the belt roller shaft into the belt roller, and sequentially install the lower bearing, lining ring, upper bearing, and shaft retaining ring. Apply a small amount of lubricating grease to the bearing before installation, and then tighten the gland.

3.2.4.3 After the belt roller is installed in the correct position in the hole on the machine body, the protruding part of the lower part of the torsion spring is inserted into the φ 2.5 hole in the installation hole of the belt roller on the machine body, and the torsion spring can only withstand counterclockwise torque. After the belt roller component is in place, the crankshaft can only rotate counterclockwise, and the rotation angle must not exceed 360 °. When restoring, it can only be gently returned by hand and cannot be suddenly released to listen to its rebound.

3.2.4.4 The operation of the belt roller must be flexible and free. It is recommended to unscrew the belt roller cover and add an appropriate amount of lubricating grease every 35 to 40 hours after operation.

3.2.5 Motor assembly

The motor should be equipped with a starter and a phase failure protector.

3.2.5.1 Motor assembly shall be carried out in accordance with the requirements for motor disassembly and assembly. The starter should be a jog switch with a phase loss protector.

3.2.5.2 The pulley must be kept intact and correctly positioned and fixed to ensure balance. To ensure vertical assembly of the motor, it is required that the main pulley plane be leveled with a levelness of less than 0.10mm/m.

3.2.5.3 Connect the wires according to the requirements on the motor nameplate, and after connecting the wires, start the motor by turning it clockwise.

3.2.5.4 In order to prevent excessive starting current, it is recommended to install a star delta converter with a starting time of less than 2 minutes. Generally, the starting current is 6-7 times the rated current of the motor, with a maximum of 40A or more.

After installing the main pulley on the motor, the no-load operation should be smooth and gentle.

3.2.5.6 Unless the machine is fully installed, it is not allowed to use pulleys to connect the main pulley of the motor to the machine head.

3.3 Final assembly

3.3.1 The cooling system and circuit system directly related to the machine must be in place before entering the final assembly.

3.3.2 Insert the nose assembly into the upper hole of the fuselage and fix it with screws; Install the belt roller component and secure it.

3.3.3 Rotate the protective screw sleeve upwards from the lower part of the machine head to the bottom.

3.3.4 The lower bearing assembly is installed from the lower part of the machine body. During installation, the groove of the bearing seat is aligned with the pin at the lower part of the machine body. At this time, the two locking handles are placed in the upper position. After the bearing is installed, the locking handles are rotated outward 180 ° to a downward vertical position. As long as the lower bearing assembly is installed on the machine body, the downward position of the two handles must not be changed in any way. After installing the lower bearing, insert the oil cup from the side and inject lubricating grease into the bearing seat.

3.3.5 Install the lower shaft of the rotary drum into the lower bearing group of the machine body, and support the lower end cover of the rotary drum on the outer cover of the lower bearing. When installing the rotary drum, handle it gently to prevent collision.

3.3.6 Install the fluid tray, cover, and sealing ring.

3.3.7 Remove the protective screw sleeve from the head of the drum, press down the spindle, ensure that the spindle stopper matches the groove of the drum head correctly, connect the drum head to the connecting nut, and then tighten it with two specialized wrenches. Ensure that the spindle stopper is fully aligned with the groove at the head of the drum.

Attention: Before connecting the main shaft, ensure that the transverse pin of the main shaft head is embedded in the cross pin groove of the cross shaft sleeve.

3.3.8 Rotate the drum by hand to observe the condition of the connecting nut. The connection should be stable and there should be no significant shaking or abnormal rubbing sound of the drum.

3.3.9 Install the input tube and feeding device from the bottom, and tighten the feeding nut.

3.3.10 Use your hand to turn the belt roller counterclockwise, install the belt, fasten the belt roller, rotate it by hand, confirm everything is normal, install the opening pressure sleeve, unscrew the protective screw sleeve and press it tightly.

3.3.11 Check if there are any unrelated objects or tools around the drum, and only after confirming everything is correct can the test run be carried out.

3.3.12 No load test run, first jog and then start. The machine should have no abnormal vibration or noise, and the belt should not have obvious movement. If using a new belt, observe for 5 minutes. If the belt reaches the top or bottom of the large pulley, reverse the belt and place the top edge underneath.

3.3.13 After everything is normal, install the belt cover and tighten the cover nut.

3.3.14 If using a cooling system, check the cooling jacket and joints for any leakage.

3.4 Startup

3.4.1 Before starting up, check the fluid tray and ensure that the protective screw sleeve is correctly positioned and tightened.

3.4.2 If using a cooling system, open the cooling jacket.

3.4.3 After confirming that everything is correct, the centrifuge can be started. First, jog it once or twice, with an interval of 2-3 seconds between each jog, and then start it again.

3.4.4 For machines that are operating normally, there should be no significant vibration or discontinuous knocking sound during other operations, except for the moment when the critical speed is exceeded.

3.4.5 After stable operation for 2-3 minutes, the separated medium can be introduced.

The pressure requirement for the separated liquid entering the machine is 1.5m ± 0.2m liquid column. (Approximately 0.015Mpa, user guarantee)

3.4.7 Before each operation, check the lower bearing assembly and add a small amount of grease to the oil cup to ensure good lubrication of the sliding bearings.

3.5 Shutdown

3.5.1 Before stopping the machine, the feeding must be cut off first, and the machine can only be stopped when there is no liquid discharged from the discharge pipe.

3.5.2 When the speed drops to a lower speed, the liquid inside the rotor flows out through the outlet at the bottom of the lower bearing, and residual liquid is collected in a pre prepared container.

3.5.3 The machine can only be parked by free inertia and cannot be stopped by any forced method.

3.5.4 If the machine has not completely stopped running, no parts connected to the machine can be disassembled or assembled.

3.5.5 After confirming that the machine is completely stopped, loosen the protective screw sleeve to the upper specified position and remove the opening pressure sleeve.

3.5.6 Use a special wrench to loosen the nut that matches the main shaft and the drum. The direction of force should be to generate a pure force couple to prevent deformation of the main shaft. Avoid using a hammer to strike or applying force directly to the machine body.

3.5.7 Push the spindle upwards to the fixed position and screw the protective sleeve onto the head of the drum. Remove the liquid tray and cover.

3.5.8 Remove the drum and place it on a dedicated bracket for discharging.

3.5.9 The feed pipe, discharge pipe, and liquid collection tray must be cleaned in a timely manner, and the drum must be disassembled according to the prescribed process and cleaned and disinfected in a timely manner.

3.6 Requirements for disassembly and assembly

3.6.1 The joint surface between the drum head and the main shaft must have a good fit, and attention should be paid to protecting the threads of the drum head. Each assembly must be carefully inspected, and the joint surface must be intact and clean.

3.6.2 Each removed rotating component should be carefully inspected, and any that do not meet the requirements should be repaired or replaced, otherwise assembly is not allowed.

3.6.3 Use a special tool clamp to disassemble and assemble the end cap. When installing, tighten the end cap tightly, and the error of the arrow mark should not exceed ± 10mm. Use a flexible hammer to strike the wrench.

3.6.4 After disassembling the drum, it must be cleaned thoroughly as any remaining residue on the drum wall can affect balance and normal use.

3.6.5 After running for a period of time, check whether there is any dirt in the bearing. If there is, remove and clean it in a timely manner, and then install it according to the regulations.

3.6.6 In any case, it is necessary to ensure that rotating parts are not subjected to collisions or strong vibrations, to prevent scratches, deformations, and to avoid affecting the mechanical accuracy and service life of the rotating parts. Ensure the safe operation of the machine.

During a certain period of time, when important components such as the drum, machine head, and lower bearings are stopped from use, they must be properly stored to prevent deformation, corrosion, etc. The spindle must be lifted and not placed flat.

When disassembling the belt, the pressure pulley crank only needs to be rotated clockwise to return, and it should be positioned counterclockwise during installation.

3.6.9 The disassembly head pin must be tapped with a soft hammer at the marked end, and installed in the opposite direction.

Add an appropriate amount of lubricating oil to the bearing of the machine head every week. The refueling amount is 70% of the gap.