Yantai Bonway Manufacturer

Windlass brake lock brake

1. The structure of the windlass brake lock brake:
It is mainly composed of two parts: brake electromagnet and brake shoe brake.
The brake electromagnet is composed of iron core, armature and coil. Brake shoe brake includes brake wheel, brake shoe and spring, etc. The brake wheel and the motor are installed on the same rotating shaft.
2. The working principle of the windlass brake lock brake: the motor is powered on, and the electromagnetic brake coil is also energized. The armature pulls in and overcomes the tension of the spring to separate the brake shoe from the brake wheel and the motor runs normally. When the switch or contactor is disconnected, the motor loses power and the electromagnetic brake coil is also loses power. The armature is separated from the iron core under the action of the spring tension, and the brake shoe of the brake tightly embraces the brake wheel, and the motor is braked and stopped. turn.
3. Features of windlass brake lock brake:
Mechanical braking mainly adopts electromagnetic brake and electromagnetic clutch braking, both of which use electromagnetic coils to generate magnetic field after energization, so that the static iron core generates enough suction to attract the armature or moving iron core (the moving iron core of the electromagnetic clutch is Pull in, separate the dynamic and static friction plates), overcome the tension of the spring and meet the requirements of the work site. The electromagnetic brake is to brake the brake wheel by the friction plate of the brake shoe. The electromagnetic clutch uses the friction force between the dynamic and static friction plates to make the motor brake immediately after the power is cut off.
Advantages: electromagnetic brake, strong braking force, widely used in lifting equipment. It is safe and reliable and will not cause accidents due to sudden power failure.

Precautions when using the hoist:
1. The wire ropes on the reel should be arranged neatly. If overlapping or oblique winding is found, stop the machine and rearrange it. It is strictly forbidden to pull and step on the wire rope with hands or feet during rotation. The wire rope is not allowed to be fully released, and at least three turns should be retained.
2. The wire rope is not allowed to be knotted or twisted. If the wire is broken more than 10% within a pitch, it should be replaced.
3. During operation, no one is allowed to cross the wire rope, and the operator is not allowed to leave the hoist after the object (object) is lifted. Objects or cages should be lowered to the ground during rest.
4. During operation, the driver and signalman must maintain good visibility with the hoisted object. The driver and signalman should cooperate closely and obey the unified signal command.
5. In case of a power outage during operation, the power supply should be cut off and the lift should be lowered to the ground.

A winch is a small and light lifting device that uses a reel to wind a steel wire rope or chain to lift or haul heavy objects, also known as a winch. The winch can lift heavy objects vertically, horizontally or tilt. There are three types of winches: manual winches, electric winches and hydraulic winches. Mainly electric winches. It can be used alone or as a component in machinery such as lifting, road building and mine hoisting. It is widely used because of its simple operation, large rope winding volume and convenient displacement. Mainly used in construction, water conservancy projects, forestry, mines, docks, etc. for material lifting or flat towing.

First. The winch is also called a winch, used to lift and drag heavy objects. It can be used alone or used in other mechanisms with a pulley. There are various structures and styles of hoisting machines. Various hoisting machines are widely used in construction work, machinery production and other industries. They are mainly used for lifting or lowering goods in the vertical direction (or along an inclined plane). They are simple to operate, low in price, and compatible. The operator has the advantage of not having high demands.
Two, electromagnetic brake
Electromagnetic brake is a mechanical brake, which uses external mechanical force to quickly stop the motor. Because this external mechanical force is produced by the electromagnetic brake tightly holding the brake wheel coaxial with the motor, it is called electromagnetic brake. Electromagnetic brake is divided into two types: power-off electromagnetic brake and energized electromagnetic brake.
1. Electromagnetic holding brake
The electromagnetic brake is composed of electromagnet and brake shoe. Brake shoe brake includes lever, brake shoe, brake wheel spring, etc. The brake wheel and the motor are mounted on the same shaft, and are divided into power-on type and power-off type. The energized electromagnetic brake structure, when the coil of the electromagnet is energized at the same time, attracts the armature to close it with the static iron core, overcomes the elastic force of the spring, and moves the brake lever upward, so that the brake shoe holds the brake wheel for braking; the coil loses power When the brake shoe is separated from the brake wheel, the brake is used. If it is a de-energized electromagnetic brake structure, when the coil is de-energized, the armature is released, and under the action of the spring, the brake shoe and the brake wheel tightly hold and brake. The electromagnetic brake is relatively safe and reliable, can realize accurate parking, and is widely used in overweight equipment. Symbol for electromagnetic brake.
The advantages of electromagnetic brake braking are large braking torque, rapid braking, safe and reliable, and accurate parking. The disadvantage is that the faster the brake, the greater the impact and vibration, which is not good for mechanical equipment. Because this braking method is relatively simple and convenient to operate, it is widely used in the production site. The electromagnetic brake device is large in size. For mechanical equipment such as machine tools with a relatively compact space, it is difficult to install, so it is used less.

2. Working principle of power off windlass brake lock brake
The brake is always in the "holding" state. The working principle of the circuit is: close the power switch QS. Press the start button SB1, the contactor KM1 is energized, the solenoid winding is connected to the power source, the solenoid core moves upward, the brake is lifted, and the brake wheel is released. The motor is connected to the power source and starts to run. Press the stop button SB2, the contactor KMI is de-energized and released, the motor and solenoid windings are both de-energized, the brake is pressed tightly on the brake wheel under the action of the spring, and the motor is quickly stopped by friction.
3. Working principle of windlass brake lock brake
The brake is always in the "released" state. The working principle of the circuit is: close the power switch QS. Press the start button SBI, the KMI coil of the contactor is energized and the motor starts to run. Press the stop button SB2, the contactor KM1 is reset after power failure, and the motor is disconnected from the power supply. The KM2 coil of the contactor is energized, the solenoid coil is energized, and the iron core moves downward to make the brake tightly hug the brake wheel. When the inertial speed of the motor drops to zero, release SB2 to de-energize the solenoid winding, and the brake returns to the "released" state.

3. Windlass brake lock brake
1. Structure of electromagnetic clutch
The electromagnetic clutch is also called electromagnetic coupling. It uses the principle of electromagnetic induction and the friction between the inner and outer friction plates to make the two rotating parts in the mechanical transmission system work together with the driven part when the active part does not stop moving. An electromagnetic mechanical connector that combines or separates parts. It is an automatic electrical appliance. The electromagnetic clutch can be used to control the starting, reverse rotation, speed regulation and braking of the machine. It has the advantages of simple structure, fast action, small control energy, convenient for remote control; small size, large torque, rapid and stable braking, etc. Therefore, electromagnetic clutches are widely used in various processing machine tools and mechanical transmission systems. According to different structures, it is divided into friction plate type electromagnetic clutch, jaw type electromagnetic device, magnetic powder type electromagnetic device and eddy current type electromagnetic clutch.
2. Principle of electromagnetic clutch
The structure diagram of the friction plate windlass brake lock brake is mainly composed of excitation coil, iron core, armature, friction plate and connection. Electromagnetic clutches generally use DC 24V as power supply. The spline shaft end of the driving shaft 1 is equipped with an active friction plate, which can move freely along the axial direction. Because of the spline connection, it will rotate with the driving shaft. The driven friction plate and the driving friction plate are alternately stacked, and the convex part of the outer edge is stuck in the sleeve fixed with the driven gear, so the driven friction plate can follow the driven gear, and it does not need to rotate when the driving shaft rotates . When the coil is energized, the friction plate is attracted to the iron core, the armature is also attracted, and each friction plate is tightly pressed. Relying on the friction between the main and driven friction plates, the driven gear rotates with the driving shaft. When the coil is de-energized, the coil spring installed between the inner and outer friction plates restores the armature and the friction plates, and the clutch loses the function of transmitting torque. One end of the coil receives direct current through a brush and slip ring, and the other end can be grounded.
The advantages of the electromagnetic clutch are small size, large transmission torque, convenient operation, flexible operation, relatively stable and rapid braking mode, and easy to install in mechanical equipment such as machine tools.

Maintenance:
In the design process of the hoist, it is necessary to avoid the phenomenon of wire rope disorder and rope biting. A hoist with a cam rope arrangement is proposed. The drum is the key design component. The traditional design method is mostly based on experience. thickness.
The motor is an important part of the hoist, and it is also the most expensive part of the hoist. If it is damaged, the repair or replacement cost will be very high. So here to remind customers to take good care of the hoist or winch motor. The maintenance methods are as follows:
1. The operating environment should always be kept dry, the surface of the motor should be kept clean, and the air inlet should not be obstructed by dust, fibers, etc.
2. When the thermal protection of the motor continues to operate, it should be ascertained whether the fault comes from the motor or the overload or the setting value of the protection device is too low. After the fault is eliminated, it can be put into operation.
3. The motor should be well lubricated during operation. The general motor runs for about 5000 hours, that is, the grease should be added or replaced. When the bearing is overheated or the lubrication is deteriorated during operation, the hydraulic pressure should be replaced in time. When replacing the grease, remove the old lubricating oil, and clean the oil grooves of the bearing and bearing cap with gasoline, and then fill 1/2 of the cavity between the inner and outer rings of the bearing with ZL-3 lithium-based grease (for 2 poles) And 2/3 (for 4, 6, and 8 poles).

4. When the life of the bearing is over, the vibration and noise of the motor will increase significantly. When the radial clearance of the bearing reaches the following value, the bearing should be replaced.
5. When disassembling the motor, the rotor can be taken out from the shaft extension end or the non-extended end. If it is not necessary to remove the fan, it is more convenient to take out the rotor from the non-shaft extension end. When pulling out the rotor from the stator, prevent damage to the stator winding or insulation.
6. When replacing the winding, you must write down the form, size, number of turns, wire gauge, etc. of the original winding. When you lose these data, you should ask the manufacturer to change the original design winding at will, which often results in one or several performances of the motor. Deteriorating, even unusable.

Braking principle of electromagnetic winch:
When the electromagnetic coil is not energized, there is no attraction between the electromagnet cores, and the brake pads of the winch are locked with the main shaft of the reducer under the action of the brake spring pressure of the winch, the brake rack is locked, and the winch is locked. At rest
When energized, the solenoid coil of the hoist is current, the electromagnet core quickly magnetizes and pulls in, drives the brake arm of the hoist to make the brake spring of the hoist be forced, the brake shoe of the hoist opens, and the shaft of the reducer of the hoist is released The hoist starts to work.