Product Description

XCMG High efficiency 6ton wheel loader LW600KN 

Item		Specification	Unit
Rated operating load		6000	kg
Bucket capacity		3.0~4.5	m³
Machine weight		20000±300	kg
Dump clearance at maximum lift		3170~3750	mm
Reach at maximum lift		1200~1360	mm
Wheel base		3350	mm
Tread		2265	mm
Max.breakout force		205	kN
Hydraulic cycle time-raise		5.9	s
Total hydraulic cycle time		10.9	s
Min. turning radius over tyres		6005	mm
Articulation angle		38	°
Gradeability		28	°
Tyre size		23.5-25
Overall machine dimension L×W×H		8505×3220×3515
Rated Power		178	Kw
Travel speed	I-gear(F/R)	6/6	km/h
	II-gear(F/R)	11/11
	III-gear(F/R)	22/22
	IV-gear(F/R)	34/34	km/h

Model Characteristics

XCMG LW600KN 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 machinery product for the production organization in the fields of ports, mines, engineering constructions, and logistics.

The super-strong heavy-duty structural parts, enhanced drive system, and globally supplied critical parts can carry the torsion and impact loads under diversified working conditions.

The high-efficiency electronic control countershaft transmission matches perfectly with the engine. The optimally designed working device equipped features automatic leveling, pilot control, and high operation efficiency.

With wide scope design, this machine is applicable for diversified working environments, including high altitude, heavy dust, high temperature, and low temperature. The diversified attachments can be equipped to meet the needs of diversified working conditions.

The centralized pressure measurement, “one-stop” maintenance, easily cleanable single-row radiator with large fin spacing, and extended replace ment interval of hydraulic oil realize short shutdown time and low maintenance cost.

The globalized full-enclosed and slightly pressurized cab with heating and air conditioning system features a broad vision and enlarges the interior space by 20%. The multi-direction adjustable control box and steering column and the scientific ergonomic design bring about a first-class driving/riding experience.

Engine

The three-stage air filter is designed especially for severe working environment of construction machinery industry.

The multi-stage fuel filter ensures good fuel adaptability and guarantees cleanliness of engine system.

Heavy-duty electronic control countershaft transmission

The material and heat treatment for pump shaft connecting spline are improved and the forced lubrication is applied to prolong the life by 20%.

Enhanced drive axle

With optimized materials and processes, the main reducer and wheel reducer passed the industry’s leading reliabilitylife test of >900,000 cycles.

The axle housing is design optimized and the cross section of the housing is enlarged to increase the carrying capacity and bending resistance by 10%.

The optional maintenance-free wet brake axle improves the braking reliability.

Structural parts

The super-strong heavy-duty design eliminates partial weaknesses and meets the needs under diversified severe operating conditions with fatigue destruction test of millions of cycles.

The robot welding process ensures stable weld quality and high fusion depth.

Hydraulic system

The double-pump confluence/distribution technology is applied so that the steering pump preferentially supplies oil to the steering system. When no steering operation is made, the oil flow of the steering pump completely flows into the working hydraulic system to reduce the displacement of working pump, improve the reliability of hydraulic units, and at the same time reduce the generated heat of hydraulic system

and realize energy-conservation.

The automatic unloading function is provided to reduce the energy loss of high pressure overflow of the hydraulic system, increase the traction force by 15% under combination operation, and remarkably improve the working efficiency.

Working device

The high-efficiency linkage system features fast motions, high breakout force, and powerful lifting capacity.

With optimal shape design, the bucket features low insertion resistance and high fullness rate.

The CZPT plates are additionally installed for the standard bucket and the rock bucket to prevent the splashing of material.

Comfortable operations

The full-hydraulic pilot controlled working device and steering system features handy control and reduces the working strength of the driver.

The steering gear, seat, and control box are freely adjustable depending on the operator’s needs. 

 The strong human-machine interactivity for the pedals and controls mitigates the fatigue during long-time operations.

The combination (flexible mode first and rigid mode second) of hydraulic flexible mode and mechanical rigid mode is adopted for the steering limits, in order to relieve the impact and ensure driving/riding comfort.

Comfortable driving environment

Well insulated against noise, dust, and heat, the full-enclosed integral framework cab creates a healthy driving environment.

The panoramic glasses and super-large spherical rearview mirrors ensure a broad vision and easy and safe operations.

The utilizable space of the cab is enlarged by 20% and the seats are backward inclinable in large angle to bring about more comfort. 

The slightly pressurized A/C system with filtration function provides the operator with a comfortable working environment.

 The graceful and elegant instruments bring about a car-style visual enjoyment.

Reversing camera: The optional reversing camera system realizes higher reversing safety.

Operation economy

The working device is design optimized to reduce the unnecessary consumption and improve the power utilization rate.

The high energy-conservation and high-efficiency hydraulic system is applied to realize higher fuel utilization efficiency and more powerful working capacity.

The replacement interval is extend ed from 250h to 500h for the engine oil and is extended to 2,000h for the hydraulic oil to shorten the shut down time and reduce the mainte nance cost. In addition, the replace ment volume of hydraulic oil is reduced by 20% compared with the like models.

Environment adaptability

Normal operation under environment temperature of -35ºC~+45ºC. 

No power drop under altitude of up to 3,000m

A high-flow ventilator is installed for various systems to meet the operation needs under heavily dusty environment.

Convenient maintenances

The engine hood adopts upturning large door design in large opening angle to ease the daily maintenances.

The “one-stop” maintenance can be fulfilled for the engine oil filter, diesel filter, transmission and torque converter filters, and air filter. 

The centralized pressure measurement and the centralized lubricating for the hinges ease the services and maintenances.

The externally arranged booster cylinder, air reservoir, and A/C achieve reasonable structural arrangement and easy maintenances.

 

Applications of Spline Couplings

A spline coupling is a highly effective means of connecting 2 or more components. These types of couplings are very efficient, as they combine linear motion with rotation, and their efficiency makes them a desirable choice in numerous applications. Read on to learn more about the main characteristics and applications of spline couplings. You will also be able to determine the predicted operation and wear. You can easily design your own couplings by following the steps outlined below.

Optimal design

The spline coupling plays an important role in transmitting torque. It consists of a hub and a shaft with splines that are in surface contact without relative motion. Because they are connected, their angular velocity is the same. The splines can be designed with any profile that minimizes friction. Because they are in contact with each other, the load is not evenly distributed, concentrating on a small area, which can deform the hub surface.
Optimal spline coupling design takes into account several factors, including weight, material characteristics, and performance requirements. In the aeronautics industry, weight is an important design factor. S.A.E. and ANSI tables do not account for weight when calculating the performance requirements of spline couplings. Another critical factor is space. Spline couplings may need to fit in tight spaces, or they may be subject to other configuration constraints.
Optimal design of spline couplers may be characterized by an odd number of teeth. However, this is not always the case. If the external spline’s outer diameter exceeds a certain threshold, the optimal spline coupling model may not be an optimal choice for this application. To optimize a spline coupling for a specific application, the user may need to consider the sizing method that is most appropriate for their application.
Once a design is generated, the next step is to test the resulting spline coupling. The system must check for any design constraints and validate that it can be produced using modern manufacturing techniques. The resulting spline coupling model is then exported to an optimisation tool for further analysis. The method enables a designer to easily manipulate the design of a spline coupling and reduce its weight.
The spline coupling model 20 includes the major structural features of a spline coupling. A product model software program 10 stores default values for each of the spline coupling’s specifications. The resulting spline model is then calculated in accordance with the algorithm used in the present invention. The software allows the designer to enter the spline coupling’s radii, thickness, and orientation.

Characteristics

An important aspect of aero-engine splines is the load distribution among the teeth. The researchers have performed experimental tests and have analyzed the effect of lubrication conditions on the coupling behavior. Then, they devised a theoretical model using a Ruiz parameter to simulate the actual working conditions of spline couplings. This model explains the wear damage caused by the spline couplings by considering the influence of friction, misalignment, and other conditions that are relevant to the splines’ performance.
In order to design a spline coupling, the user first inputs the design criteria for sizing load carrying sections, including the external spline 40 of the spline coupling model 30. Then, the user specifies torque margin performance requirement specifications, such as the yield limit, plastic buckling, and creep buckling. The software program then automatically calculates the size and configuration of the load carrying sections and the shaft. These specifications are then entered into the model software program 10 as specification values.
Various spline coupling configuration specifications are input on the GUI screen 80. The software program 10 then generates a spline coupling model by storing default values for the various specifications. The user then can manipulate the spline coupling model by modifying its various specifications. The final result will be a computer-aided design that enables designers to optimize spline couplings based on their performance and design specifications.
The spline coupling model software program continually evaluates the validity of spline coupling models for a particular application. For example, if a user enters a data value signal corresponding to a parameter signal, the software compares the value of the signal entered to the corresponding value in the knowledge base. If the values are outside the specifications, a warning message is displayed. Once this comparison is completed, the spline coupling model software program outputs a report with the results.
Various spline coupling design factors include weight, material properties, and performance requirements. Weight is 1 of the most important design factors, particularly in the aeronautics field. ANSI and S.A.E. tables do not consider these factors when calculating the load characteristics of spline couplings. Other design requirements may also restrict the configuration of a spline coupling.

Applications

Spline couplings are a type of mechanical joint that connects 2 rotating shafts. Its 2 parts engage teeth that transfer load. Although splines are commonly over-dimensioned, they are still prone to fatigue and static behavior. These properties also make them prone to wear and tear. Therefore, proper design and selection are vital to minimize wear and tear on splines. There are many applications of spline couplings.
A key design is based on the size of the shaft being joined. This allows for the proper spacing of the keys. A novel method of hobbing allows for the formation of tapered bases without interference, and the root of the keys is concentric with the axis. These features enable for high production rates. Various applications of spline couplings can be found in various industries. To learn more, read on.
FE based methodology can predict the wear rate of spline couplings by including the evolution of the coefficient of friction. This method can predict fretting wear from simple round-on-flat geometry, and has been calibrated with experimental data. The predicted wear rate is reasonable compared to the experimental data. Friction evolution in spline couplings depends on the spline geometry. It is also crucial to consider the lubrication condition of the splines.
Using a spline coupling reduces backlash and ensures proper alignment of mated components. The shaft’s splined tooth form transfers rotation from the splined shaft to the internal splined member, which may be a gear or other rotary device. A spline coupling’s root strength and torque requirements determine the type of spline coupling that should be used.
The spline root is usually flat and has a crown on 1 side. The crowned spline has a symmetrical crown at the centerline of the face-width of the spline. As the spline length decreases toward the ends, the teeth are becoming thinner. The tooth diameter is measured in pitch. This means that the male spline has a flat root and a crowned spline.

Predictability

Spindle couplings are used in rotating machinery to connect 2 shafts. They are composed of 2 parts with teeth that engage each other and transfer load. Spline couplings are commonly over-dimensioned and are prone to static and fatigue behavior. Wear phenomena are also a common problem with splines. To address these issues, it is essential to understand the behavior and predictability of these couplings.
Dynamic behavior of spline-rotor couplings is often unclear, particularly if the system is not integrated with the rotor. For example, when a misalignment is not present, the main response frequency is 1 X-rotating speed. As the misalignment increases, the system starts to vibrate in complex ways. Furthermore, as the shaft orbits depart from the origin, the magnitudes of all the frequencies increase. Thus, research results are useful in determining proper design and troubleshooting of rotor systems.
The model of misaligned spline couplings can be obtained by analyzing the stress-compression relationships between 2 spline pairs. The meshing force model of splines is a function of the system mass, transmitting torque, and dynamic vibration displacement. This model holds when the dynamic vibration displacement is small. Besides, the CZPT stepping integration method is stable and has high efficiency.
The slip distributions are a function of the state of lubrication, coefficient of friction, and loading cycles. The predicted wear depths are well within the range of measured values. These predictions are based on the slip distributions. The methodology predicts increased wear under lightly lubricated conditions, but not under added lubrication. The lubrication condition and coefficient of friction are the key factors determining the wear behavior of splines.