The 6MY98-17 brush-type sawtooth gin is suitable for processing cotton with a fiber length of 23 to 33mm, a moisture content of no more than 10%, and preliminary cleaning. This equipment can effectively remove special, heavy and stiff cotton, cotton leaves, infertile particles, dust and other small impurities in the cotton. It can improve the appearance and color of the cotton, improve the quality of the cotton, and ensure the lint. Improve the processing quality and improve the efficiency of the cotton gin.
(1) Structure of the gin machine
The 6MY98-17 sawtooth gin machine is composed of blower and flower feeding, ginning part, transmission system and other parts, as shown in Figure 8-6.
Among them, the blowroom and flower feeding part is a cleaning type blowroom and flower feeding machine, which consists of three parts: cotton feeding, cleaning, and noil recovery. The ginning part consists of three parts: the front box, the middle box, and the back box.
1. Blowing and feeding part
The function of the blowing and feeding part is to further loosen the cotton and remove impurities in the cotton; second, to adjust the feeding amount of cotton according to the needs of ginning. Continuously and evenly feed the cotton to the ginning section.
The cleaning and flower feeding part is divided into three parts: cotton feeding, cleaning and recycling.
(1) Structure of cotton feeding part: The main components of this part are a pair of pattern feeding rollers and speed regulating device, opening roller and impurity discharge net. The two flower feeding rollers have the same specifications. When one roller rotates, it is driven by a pair of gears with the same number of teeth, and the other roller rotates at the same speed.
The cotton enters the gin from the entrance on the upper part of the flower feeding roller. The flower feeding and opening roller is a spike roller. There is a debris removal net on the outer periphery of the opening roller. The debris removal net is made of steel plate punching and adopts a long shape. The holes are staggered.
(2) Structure of the purification part: The main components of this part include a sawtooth roller, a stiffening grid, a wire brush, and a small brush roller.
The diameter of the sawtooth roller is 350mm and the rotation speed is 437r/min; the stiffening grid is composed of a precision dialing tube with a diameter of 20mm, side plates and reinforcing ribs; the function of the small brush roller is to move the sawtooth roller and the recovery sawtooth roller together The sub-cotton brush falls down and supplies the ginning part.
(3) The structure of the recycling part: This part consists of a recycling sawtooth roller, a wire brush, an impurity removal grid, a small brush roller, an impurity removal spiral, etc. The structure of the recycling sawtooth roller is the same as that of the sawtooth roller, and its function is to recover single particles of cotton discharged from the rigid grid. The impurity removal spiral is left-handed and rotates at 110r/min. Its function is to timely export the stiff cotton, bell shells and dust discharged from the blow cleaning and flower feeding part to the outside of the machine.
2. The embossed part
The embossed part consists of three parts: the front box, the middle box and the back box.
(1) Structure of the front box: The left and right side walls of the front box are welded by steel plates. The main components include cotton pick-up rollers, shell rib rows, and deflectors.
The licker-in roller is made by hooping a log roller on a shaft with a diameter of 30mm, wrapping it with a thin steel plate, and then installing several rows of spikes on the surface in an inclined shape. The diameter of the licker-in roller is 120mm, and the rotation speed is 314r/min. A steel plate punching net is installed under the cotton-picking roller. Its function is to recover the small flower heads that fall from between the cotton-picking roller and the saw blade drum to reduce clothing losses. A brake wheel is installed on the right end of the cotton-picking roller. When the working box is opened, the brake belt rubs against the brake wheel, causing the cotton-picking roller to stop rotating.
The rib row of the resistance shell is composed of 97 resistance shell ribs and 2 side resistance shell ribs fixed on the angle steel. The position of the rib row of the resistance shell can be adjusted by loosening the fixing bolts on both sides and adjusting the jack screw to make the rib row of the resistance shell swing back and forth.
The guide plate is an inclined steel plate located in the front box. Its function is to guide the cotton entering the front box to the cotton picking roller.
(2) Structure of the middle box (work box): The main components of the middle box include embossed rib rows, chest plate, movable cover plate, holding plate, saw blade roller, cotton comb and work box adjustment mechanism, work box The box opening and closing mechanism is shown in Figure 8-7. The embossed rib row is composed of 97 embossed ribs and 2 side ribs mounted on one beam. The embossed ribs are cast from cast iron and have a galvanized surface.
The saw blade drum consists of 98 saw blades and 96 aluminum spacers, which are alternately sleeved on a shaft with a diameter of 74.6mm, and both ends are fixed with clamping washers and nuts. Both ends of the saw blade drum are fixed on the frame with square outer spherical bearings with eccentric sleeves.
The chest plate, movable cover plate and hugging plate are all curved and made of 1.5mm thick stainless steel plate. The curvature radius of the chest plate is the smallest, the movable cover plate is the second, and the hugging plate is the largest. The two side walls of the middle box are lined with stainless steel plates to reduce the movement resistance of the cotton rolls.
The cotton comb is of plate type, its shaft is installed on the wall panel, and the right end extends out of the wall panel and is connected to the adjustment handle to adjust the inclination angle of the cotton comb. The cotton comb can move forward and backward to cooperate with the work of other machine parts.
(3) Structure of the rear box: The rear box is mainly composed of brush roller, upper row of debris knives, lower row of debris mechanism, rear windshield and other components.
The axis line of the brush roller is lower than the axis line of the saw blade roller and is installed behind the saw blade roller. The brush roller consists of 5 aluminum discs fixed on a shaft with a diameter of 75mm. The discs are tightly wrapped into a cylinder with galvanized steel plates, and 24 brush strips are fixed on the surface of the roller with pressure plate screws. Become. Each end of the brush drum is equipped with 4 fan blades distributed in a “cross” shape. Its function is to prevent the fibers under the brush from flying to both ends and wrapping around the brush shaft. The diameter of the brush roller is 408mm, and the rotation speed is 1660r/mm.
The upper row of miscellaneous knives is made of planed steel plate with a blade angle of 35°. It is installed at the front end of the brush cover near the saw blade drum.
To increase its surface finish, the surface is galvanized. The distance between the upper debris removal knife and the saw blade drum affects the upper debris removal effect. During the production process, the distance is adjusted depending on the cotton fiber content in the upper debris removal, and the distance is required to be between 1 and 2mm.. The upper waste is transported by air flow.
The lower trash removal mechanism includes lower trash discharge plates, movable plates, etc. Generally, the distance between the lower row of miscellaneous plates and the brush roller is 40mm. When it is necessary to increase the amount of debris discharged, the position of the adjustment bolt on the lower left side of the frame can be adjusted to make the lower row of debris plates swing toward the brush roller; or the movable plate can be lowered to reduce the distance the movable plate extends into the debris removal area. In order to reduce the amount of air supply in the trash discharge area to facilitate the fall of impurities and avoid the back-sucking of impurities, the machine is equipped with two air supply inlets, one at the connection between the lower trash plate rotating shaft and the lint support plate, and the other at the brush cover. Posterior upper part. During the production process, the opening degree of the air supply port can be determined based on the discharge of impurities from the bottom.
The rear windshield is made of flat steel and is connected to the cover by butterfly nuts. When adjusting the rear windshield, you need to remove the blocking plates on both sides of the brush roller frame and loosen the butterfly nuts.
3. Transmission system
The transmission system is shown in Figure 8-8. It is driven by a planetary cycloid pinwheel reducer to drive the front and rear flower feeding rollers; a 6-pole motor drives the rack roller of the cleaning department; an electric pusher The rod motor realizes the unpacking and closing work; the 4-pole motor drives the saw blade roller and brush roller.
The speed regulating device of the flower feeding roller is composed of XWD-0.75-4-1/70 star-shaped cycloidal pinwheel reducer, frequency converter, knob and a pair of transmission sprockets. The star-shaped cycloidal pinwheel reducer is installed on the upper right side of the machine, the frequency converter is placed in the electrical control cabinet, and the speed control knob is installed on the button box of the machine. The output shaft of the reducer is equipped with a sprocket, which drives the flower feeding roller to rotate through the chain. Adjust the speed knob to adjust the speed of the motor, thereby controlling the speed of the flower feeding roller.
(2) Electrical control system of the gin machine
The electrical control system of the 6MY98-17 sawtooth gin machine uses a three-phase 380V, 50Hz power supply and must have zero protection.
Control circuit uses alternating current. The system consists of two parts: button box and control cabinet. The button box is equipped with control buttons and necessary indicating devices, and the rest of the electrical control components are installed in the electrical control cabinet. The button box is installed on the safety cover on the right side of the machine. The control cabinet is installed by the user in a clean, dry, vibration-free place that is no more than 16m away from the machine according to the on-site conditions.
1. Control circuit
The electrical principle of the sawtooth gin is shown in Figure 8-9.
The control system is divided into two states: adjustment and working. The adjustment state is used for adjusting each motor and mechanical structure, and the working state is used for normal ginning work.
2. Features
In addition to In addition to the necessary short-circuit protection (automatic switch, fuse) and overload/phase failure protection (thermal relay), it also has the following features:
(1) It is equipped with a state conversion switch. When it reaches the trial production state, each motor can be started freely independently. When it reaches the working state, it must be started in a certain order.
(2) The opening and closing of the work box has time-delay protection.
(3) Stepless speed regulation of flower feeding roller. The flower feeding roller is driven by an AC motor and adopts variable frequency speed regulation to achieve stepless speed adjustment for flower feeding, replacing the previous flower plate speed control device. It is continuously adjustable during flower feeding and has an LCD display, making it easy to adjust the amount of flower feeding. It can make the cotton gin work in the best condition.
(4) The flower feeding roller has three states: manual, stop and automatic. In the manual state, the flower feeding roller will run at a given speed at a constant speed; in the automatic state, the flower feeding roller will automatically adjust the speed according to the density of the cotton roll in the working box based on manual adjustment.
(5) The working box of the gin is not in place and the feeding roller cannot work.
(6) The main motor current is displayed by the instrument. When it stops working, other motors will also stop working.
(7) The flower feeding motor has forward and reverse rotation states, which is convenient for handling traffic jams (jogging should be used when reversing).
3. Installation and debugging of electrical control equipment
The electrical components in the button box and control cabinet have been connected before leaving the factory. Just follow the relevant information provided with the machine and connect the button box/control cabinet to all electrical components. The wires of equipment and electrical components can be connected as required. After connecting the wires, use a megohmmeter or multimeter to check all motors/electrical components and lines. In order to prevent open circuits and short circuits, the setting values of KT (time relay) and FR (thermal relay) should also be set according to Table 8-3. Make adjustments.
After the above work is completed, you can follow the steps below to perform power-on debugging.
(1) Turn the toggle switch SA2 in the control cabinet to the trial production status position.
(2) Close the air switch on the right side of the control cabinet. At this time, the power indicator light on the control cabinet lights up and the voltage indicator indicates the power supply voltage value.
(3) Turn on the key switch and the indicator light on the button box will light up, indicating that the control circuit is connected.
(4) Press the start button of the main motor/blowroom motor of the gin machine to start the motor.
(5) Press the box closing button, the motor of the working box will rotate forward, and the working box will be closed to the working position.
(6) Turn the three-position button SA3 to the manual or automatic position, manually rotate the potentiometer RP, and the flower feeding roller will run at the set speed.
(7) Press the unboxing button, the working box motor reverses, the working box leaves the working position, and the flower feeding roller stops rotating.
(8) Turn SA2 to the working position, and turn the three-position button to the stop position.
At this point, the adjustment of the electrical control system is completed. It should be noted that the two travel switches on the unboxing mechanism should be adjusted so that the gin machine can open and close the box accurately. If there is an abnormality, press the emergency stop button immediately to prevent an accident.
4. Use and maintenance
You must hold the machine key to operate this machine. If the system has been debugged, you should move the SA2 in the cabinet to the working position and start it in the following sequence:
Main motor → Blowing motor → Box closing → Flower feeding motor
The parking sequence is the opposite.
In the event of an emergency at work, the emergency stop button should be pressed immediately to prevent an accident.
Electrical equipment should be kept dry and clean, avoiding vibration and collision. The control cabinet should be cleaned regularly, and lines, electrical components, and motors should be regularly inspected and maintained.
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At this point, the adjustment of the electrical control system is completed. It should be noted that the two travel switches on the unboxing mechanism should be adjusted so that the gin machine can open and close the box accurately. If there is an abnormality, press the emergency stop button immediately to prevent an accident.
4. Use and maintenance
You must hold the machine key to operate this machine. If the system has been debugged, you should move the SA2 in the cabinet to the working position and start it in the following sequence:
Main motor → Blowing motor → Box closing → Flower feeding motor
The parking sequence is the opposite.
In the event of an emergency at work, the emergency stop button should be pressed immediately to prevent an accident.
Electrical equipment should be kept dry and clean, avoiding vibration and collision. The control cabinet should be cleaned regularly, and lines, electrical components, and motors should be regularly inspected and maintained.
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