Product Description

Underground Wheel Loader
Beijun customized underground wheel loader is designed for civil engineering construction, underground and tunnel construction works, such as Copper mine, Coal mine, Galena mine, Nickel mine, Iron mine, Aluminum mine, concentrating plants, chemical plants, CZPT plants etc. 
Feature of underground wheel loader:

1. The ultra-low chassis and the side cabin offer comfortable, safe, reliable driving experiences in ultra-low mines and underground mines.

2. The large steering angle makes it suitable for flexible operation in narrow mine tunnels.
3. Power shift gear-box, good reliability and easy to maintain
4. Large capacity battery,Duration of work for 4 hours.
5. Higher efficiency: loading and withdraw coal up to 120 Cubic meter in 1 hour.
6. The seat design draw on the experience of underground working, greatly improved the front and rear visual range.
7. Integrated torque converter transmission. 
8. Specifically tailored for the underground mine operation counter-shaft power-shift gearbox.
9. Air over hydraulic break system, caliper break system, Wet brake axle available according to requirement.
10. Over load protection system: Disc brake shield, All LED light, Alarm lamp.
11. New design layout of the Hood: Increase counterweight in the front.
12.Optional: Wheel protection chains, Smooth anti puncture narrow tire, Side dump bucket, Breaking hammer, Narrow bucket without teeth.

Beijun wheel loader is rooted in the customers’ needs and based on the international R&D platform to thoroughly improve the product reliability, economy, comfort, efficiency, maintenance convenience, and adaptability and is a preferential achinery product for the production organization in the fields of ports, mines, engineering constructions, and logistics.
It is equipped with national engine, high-quality split type double change, four-wheel drive, full hydraulic steering, strong power, higher efficiency and stronger environmental adaptability.

1,Optimizing the shape of the bucket makes it easy to pick up material, achieving higher fill factors and less spillage.
2,A/C with big cooling capacity, adding air from back and bottom of machine for all-round effect.
3,Optimized preheating system and hyperboloid efficient fan, adaptable from -30 ºC ~ 45 ºC ambient temperature.
4,Optional multiple attachments, including: multiple buckets, pallet fork, handing arm, grapple and snow blade greatly expands the applications of the wheel loader.
5,The hydraulic system has a dual-pump confluence with steering always in priority, reducing energy loss.
6, 309° panoramic visibility gives the operator a very comfortable work environment in the cab.
7,Fully-sealing and micro-pressuring system ensures the cab is clean and quiet.
8, Single layer radiator and big range fin spacing for high efficiency and easy maintenance.

SPECIFICATIONS OF BEIJUN BJ926U UNDERGROUND WHEEL LOADER
Performance	Rated load	2000kg
	Overall weight	5600kg
	Rated bucket capacity	1m3
	Maximum tractive force	97KN
	Maximum breakout force	≥98KN
	Maximum grade ability	35ºC
	Maximum dump height	1700mm
	Maximum dump reach	900m
	Overall dimension (L*W*H)	5400×1800×2500mm
	Minimum turning radius	3750mm
Engine	Model	Yunnei 4102GBZ
	Type	In-line,arrangement,water cooling, four-stroke
	No. of cylinder-bore/stroke	4-102×115mm
	Rated power	76kw–2400r/min
	Maximum torque	280N.m
	Min fuel-consume ratio	≤225g/kw.h
Transmission system	Torque converter	YJ265
	Gearbox mode	Power shift normally engaged straight gear
	Gear shift	2 forward shift  2reverse shift
	Maximum speed	35km/h
Drive axles	model	underground  heavy drive axle
	Decelerating mode	planetary reduction,grade 1
	Wheel base (mm)	2150mm
	Wheel tread	1400mm
	Minimum ground clearance	300mm
	System working pressure	16MPa
hydraulic system	bucket lifting time	≤3.5
	bucket falling time	≤3
	Total time for a single working cycle	≤8
	Function of leveling automatically	Yes
Brake system	Service brake	air over hydraulic disc brake on 4 wheels
	Parking brake	manual parking brake
Tyre	Type specification	20.5/70-16
	Front tyre pressure	0.4Mpa
	Rear tyre pressure	0.35Mpa

 

Three basic types of pulleys, their applications and ideal mechanical advantages

There are 3 basic types of pulleys: movable, fixed and compound. Each has its advantages and disadvantages, and you should be able to judge which type is best for your needs by looking at the table below. Once you have mastered the different types of pulleys, you can choose the right pulley for your next project. Now that you have mastered the 3 basic types, it is time to understand their applications and ideal mechanical advantages.

describe

The stress characteristics of a pulley depend on its size and construction. These stresses are derived by comparing the stress characteristics of different pulley designs. Stress criteria include static and fatigue strength analyses and specify maximum stress ranges. Stresses are calculated in a 3D stress field, including radial, tangential and axial stresses. The stress characteristics of pulleys are critical to the design and manufacture of industrial machines.
The principal stresses on the pulley shell are distributed in the tangential and hoop directions, close to the centerline of the pulley. If the pulley has a wide face, the axial stress occurring near the shell/disk junction can be large. The stress distribution was determined using British Standard BS5400 Part 10: Stresses at the shell and end disc connections for infinite fatigue life.
Another type of composite is a pulley with a belt section. Such structures are well known in the art. The corresponding help chapters for these elements contain detailed descriptions of the internal structure of these components. Chamfers between pulleys can also be defined using multiple tapers, with a smaller taper extending from midpoint 44 to large diameter 42. Additionally, the pulley can have multiple taper angles, and as the pulley moves away, the taper angle is from the center.

type

A pulley system uses a rope to move the object and 1 side of the rope to lift the load. The load is attached to 1 end of the pulley, while the other end can move freely in space. The force applied to the free end of the rope pulls the load up or down. Because of this, the mechanical advantage of the movable pulley is 2 to one. The greater the force applied to the free end of the rope, the greater the amount of movement achieved.
There are 3 common types of pulleys. The cast-iron variety has a rim at the front and a hub at the back. The arms of the pulley can be straight or curved. When the arms contract and yield instead of breaking, they are in tension. The top of the pulley centers the belt in motion and is available in widths ranging from 9mm to 300mm.
The rope, hub and axle are mounted on the pulley. They are common and versatile mechanical devices that make it easier to move or lift objects. Some pulleys change the direction of the force. Others change the magnitude. All types of pulleys can be used for a variety of different applications. Here are some examples. If you’re not sure which type to choose, you can find more resources online.

application

The applications for pulleys are almost limitless. This simple machine turns complex tasks into simple ones. They consist of a rope or chain wrapped around a wheel or axle. Using ropes, 1 can lift heavy objects without the enormous physical exertion of traditional lifting equipment. Some pulleys are equipped with rollers, which greatly magnifies the lifting force.
When used properly, the pulley system can change the direction of the applied force. It provides a mechanical advantage and allows the operator to remain separate from heavy objects. They are also inexpensive, easy to assemble, and require little lubrication after installation. Also, once installed, the pulley system requires little maintenance. They can even be used effortlessly. Despite having many moving parts, pulley systems do not require lubrication, making them a cost-effective alternative to mechanical lifts.
Pulleys are used in many applications including adjustable clotheslines in different machines, kitchen drawers and motor pulleys. Commercial users of pulley systems include cranes. These machines use a pulley system to lift and place heavy objects. They are also used by high-rise building washing companies. They can easily move a building without compromising its structural integrity. As a result, many industries rely on technology to make elevators easier.

Ideal mechanical advantage

The ideal mechanical advantage of a pulley system is the result of rope tension. The load is pulled to the center of the pulley, but the force is evenly distributed over the cable. Two pulleys will provide the mechanical advantage of 2 pulleys. The total energy used will remain the same. If multiple pulleys are used, friction between pulleys and pulleys reduces the return of energy.
Lever-based machines are simple devices that can work. These include levers, wheels and axles, screws, wedges and ramps. Their ability to work depends on their efficiency and mechanical superiority. The ideal mechanical advantage assumes perfect efficiency, while the actual mechanical advantage takes friction into account. The distance traveled by the load and the force applied are also factors in determining the ideal mechanical advantage of the pulley.
A simple pulley system has an MA of two. The weight attached to 1 end of the rope is called FA. Force FE and load FL are connected to the other end of the rope. The distance that the lifter pulls the rope must be twice or half the force required to lift the weight. The same goes for side-by-side pulley systems.

Materials used in manufacturing

While aluminum and plastic are the most common materials for making pulleys, there are other materials to choose from for your timing pulleys. Despite their different physical properties, they all offer similar benefits. Aluminum is dense and corrosion-resistant, and plastic is lightweight and durable. Stainless steel is resistant to stains and rust, but is expensive to maintain. For this reason, aluminum is a popular choice for heavy duty pulleys.
Metal can also be used to make pulleys. Aluminum pulleys are lightweight and strong, while other materials are not as durable. CZPT produces aluminium pulleys, but can also produce other materials or special finishes. The list below is just representative of some common materials and finishes. Many different materials are used, so you should discuss the best options for your application with your engineer.
Metals such as steel and aluminum are commonly used to make pulleys. These materials are relatively light and have a low coefficient of friction. Steel pulleys are also more durable than aluminum pulleys. For heavier applications, steel and aluminum are preferred, but consider weight limitations when selecting materials. For example, metal pulleys can be used in electric motors to transmit belt motion.

cost

Replacing a tensioner in a car’s engine can cost anywhere from $90 to $300, depending on the make and model of the car. Cost can also be affected by the complexity of the pulley system and how many pulleys are required. Replacement costs may also increase depending on the severity of the damage. The cost of replacing pulleys also varies from car to car, as different manufacturers use different engines and drivetrains.
Induction motors have been an industrial workhorse for 130 years, but their cost is growing. As energy costs rise and the cost of ownership increases, these motors will only get more expensive. New technologies are now available to increase efficiency, reduce costs and improve safety standards.
The average job cost to replace an idler varies from $125 to $321, including labor. Parts and labor to replace a car pulley can range from $30 to $178. Labor and parts can cost an additional $10 to $40, depending on the make and model of the car. But the labor is worth the money because these pulleys are a critical part of a car’s engine.