Jaw crusher principle structure and daily maintenance points

The jaw crushers developed and produced today are of various types, good performance, and increasingly large structures, and are well received internationally. Since the imitation of the jaw crusher, Xingaonai has optimized the design method and improved the design data after a long period of exploration and research. The jaw crusher developed by Xingaonai in combination with the specific industrial and mining conditions of the domestic sand and gravel industry has the characteristics of large crushing ratio, high output, uniform product particle size, simple structure, reliable operation, convenient maintenance, and economical operating costs. It is widely used in the crushing of various ores and bulk materials in mining and smelting, building materials, highways, railways, water conservancy, and chemical industries. The maximum compressive strength of the crushed material is 320Mpa.

Structure:

Jaw crusher is referred to as jaw crusher. The composition of jaw crusher is relatively simple, mainly consisting of frame, eccentric shaft, large pulley, flywheel, movable jaw, side guard plate, toggle plate, toggle plate back seat, gap adjustment screw, reset spring, fixed jaw plate and movable jaw plate, among which the toggle plate also plays an insurance role.

principle:

The crushing method is of the cam extrusion type. The motor drives the belt and pulley to move the movable jaw up and down through the eccentric shaft. When the movable jaw rises, the angle between the toggle plate and the movable jaw becomes larger, thereby pushing the movable jaw plate closer to the fixed jaw plate. At the same time, the material is squeezed, rubbed, and crushed in multiple ways; when the movable jaw descends, the angle between the toggle plate and the movable jaw becomes smaller, and the movable jaw plate leaves the fixed jaw plate under the action of the pull rod and spring. At this time, the crushed material is discharged from the lower opening of the crushing chamber. As the motor rotates continuously, the movable jaw of the crusher performs periodic crushing and discharging to achieve batch production.

advantage:

1. High production efficiency: The equipment has a deep crushing chamber and no dead zone, which can improve the crushed stone feeding capacity and output, save energy and improve production efficiency.

2. Good wear resistance: The parts of the jaw crusher are made of high-quality manufacturing materials, which greatly improves the pressure resistance and wear resistance of the parts.

3. Adjustable discharge, more flexible: The gasket-type discharge port adjustment device is not only reliable and easy to use, but also can adjust the particle size of the crushed material.

4. Easy maintenance: The jaw crusher is easy to operate during use, and the maintenance work is convenient and quick, reducing downtime and maintenance time.

shortcoming:

1. Single crushing process: It cannot complete multi-dimensional crushing. Over-crushing reduces the useful components, forming waste in the crushing operation, which will cause waste of resources and cause economic losses to customers.

2. High energy consumption: When crushing ore with a compressive strength exceeding 245MPa, the jaw crusher will generate high energy consumption, and the energy-saving and consumption-reducing performance advantages are barely visible.

The maintenance of jaw crusher is an important part of its work, which must be closely coordinated with its operation and repair, and professionals must be arranged to supervise and maintain it.

Maintenance method:

1. Shut down the jaw crusher regularly and inspect the machine. Replace the parts with severe wear in time, and pay attention to the weight, model and size of the replaced parts. Be sure to replace them according to the original part parameters.

2. The jaw crusher conveyor belt should be inspected regularly, and the tightness of the conveyor belt should be adjusted regularly to ensure that the conveyor belt is evenly stressed. If the conveyor belt is found to be severely worn, please replace it in time.

3. For the lubrication of mechanical parts, use Mobil automotive grease extra or 3 lithium grease, and add an appropriate amount of grease every 400 working hours; after 2000 working hours, open the main shaft assembly to clean the bearings; generally replace new bearings after 7200 working hours.

Repair method:

1. The main contents of minor repairs include inspecting and repairing the jaw crusher adjustment device, the clearance of the high-speed discharge port, and adjusting or replacing the worn liner. Inspect the transmission part, lubrication system, and change the lubricating oil. The cycle of minor repairs is about 1-3 months.

2. In addition to all the work of minor repairs, medium repairs also include replacing thrust plates, liner plates, inspecting and repairing bearings, etc. The cycle of medium repairs is generally about 1-2 years.

3. In addition to all the work of medium repairs, overhauls also include replacing the turning eccentric shaft and movable jaw spindle, casting the Babbitt alloy on the upper part of the connecting rod head, and replacing or repairing various worn parts. The cycle of overhaul of jaw crushers is generally about 5 years.

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