Product Description

1.Product Details

 

1.Advantages Of Screw Conveyor:

 

1.Using high quality steel pipe, the overall rigidity is good.
2.Double pitch blade to reduce the degree of compression in material transportation .
3.It adopts high-quality reducer and heavy-duty design. It has the characteristics of large turning distance and low noise.
4.Universal ball connection is optional to facilitate installation, adjustment and steeling.
5.Equipped with medium suspension bearings and tail bearings of good quality, and easy to install.
6.Adequate spare parts, complete specifications.
7.Commonly used diameter 165,219,273,323,407 large stock,size and angle can be customized according to customer requirements.
8.Standard components, easy to transport.
9.One-time forming of spiral blade,double pitch design ,never plugging.

 

1.Simple structure, good sealing, easy operation and low power invest cost. 
2.It has the features of small screw diameter, high rotation speed and large capacity, specially suitable for inclined transport. The angle is up to 60 degree. 
3.Widely used in chemical, metallurgy, paper making, and construction industries, etc. 
4.Axle head and conveying spiral adopt spline connection, with features of convenient mounting&disassembling, large load capacity and stability. 
5.All sections of screw conveyor are connected with flange. Also screw blades are integral connection. 
6.Inlet and outlet chutes have many kinds of connections, such as flange, sack, universal joint, etc.

2.Our Company’s Product:

Reducer: an independent part composed of gear drive, worm drive and gear – worm drive enclosed in a rigid shell. It plays the role of matching speed and transferring torque between prime mover and working machine or actuator. It is a kind of relatively precise machinery. The purpose of using it is to reduce the speed and increase the torque. 

Shaft-end Seal: With multi-shaft-end seal in shaft end and avoids cement&mud approaching to shaft end to extend service life of the concrete mixer.
Discharging Device: Hydralic discharging system,with strong drive force and reliable discharging.Discharging door can be opened at any angle,with manual discharging function.The discharging door adopts detachable structure which is convenient for maint.
 

Shaft end seal:Separate seal and bearing, more stable operation, better maintenance, easy replacement, and maintenance;
Discharge mechanism:unloading door is made by tooling and then processed by lathe to eliminate the phenomenon of Carmen; Hydraulic discharge, stable operation.

 

 

2.Company Profile

MAHangZhou CZPT METALLURGICAL MACHINE CO.,LTD. is located in the famous steel city HangZhou City, rich iron and steel resources for the development of my company provides a unique advantage, the company is the production and research of various wear-resistant, heat-resistant, shock-resistant alloy castings professional manufacturers; business is characterized by fine, special, unique. Products to the market economy needs throughout the country, each year more than 5,000 tons of various casting products in metallurgical machinery, construction, cement, transportation and other industries widely used. This product its unique properties of various materials to resist wear and tear on the product, as many national key projects of qualified suppliers.

3.Packaging & Delivery

Quick delivery and high efficiency.
Use reinforced packaging for important electronic accessories and wearing parts.
We will carefully calculate the type of space and cabinet needed to minimize the cost to buyers and help them save money.
Port: HangZhou, ZheJiang , ZheJiang , HangZhou, HangZhou

4.Service

Technical files service provided.
Spare parts replacement and repair service provided.
Our Products can be customized according to clients’ different requirement.
Technical support online service provided.

5.After-sale Service

May enjoy the life-long service and technical consultation after you buy our products.
Certain quantity stochastic tool will be provided while delivering goods.
Within 48 hours service will be available according to different regions after received the telephone.
The time of warranty is for a whole year
Promptly provides the fittings according to users’ demands, handles for the user consigns for shipment.
Provides the technology advisory service as necessary.
Please contact me when you have any problems with the plant.

6.Contact

 

 

 

Stiffness and Torsional Vibration of Spline-Couplings

In this paper, we describe some basic characteristics of spline-coupling and examine its torsional vibration behavior. We also explore the effect of spline misalignment on rotor-spline coupling. These results will assist in the design of improved spline-coupling systems for various applications. The results are presented in Table 1.

Stiffness of spline-coupling

The stiffness of a spline-coupling is a function of the meshing force between the splines in a rotor-spline coupling system and the static vibration displacement. The meshing force depends on the coupling parameters such as the transmitting torque and the spline thickness. It increases nonlinearly with the spline thickness.
A simplified spline-coupling model can be used to evaluate the load distribution of splines under vibration and transient loads. The axle spline sleeve is displaced a z-direction and a resistance moment T is applied to the outer face of the sleeve. This simple model can satisfy a wide range of engineering requirements but may suffer from complex loading conditions. Its asymmetric clearance may affect its engagement behavior and stress distribution patterns.
The results of the simulations show that the maximum vibration acceleration in both Figures 10 and 22 was 3.03 g/s. This results indicate that a misalignment in the circumferential direction increases the instantaneous impact. Asymmetry in the coupling geometry is also found in the meshing. The right-side spline’s teeth mesh tightly while those on the left side are misaligned.
Considering the spline-coupling geometry, a semi-analytical model is used to compute stiffness. This model is a simplified form of a classical spline-coupling model, with submatrices defining the shape and stiffness of the joint. As the design clearance is a known value, the stiffness of a spline-coupling system can be analyzed using the same formula.
The results of the simulations also show that the spline-coupling system can be modeled using MASTA, a high-level commercial CAE tool for transmission analysis. In this case, the spline segments were modeled as a series of spline segments with variable stiffness, which was calculated based on the initial gap between spline teeth. Then, the spline segments were modelled as a series of splines of increasing stiffness, accounting for different manufacturing variations. The resulting analysis of the spline-coupling geometry is compared to those of the finite-element approach.
Despite the high stiffness of a spline-coupling system, the contact status of the contact surfaces often changes. In addition, spline coupling affects the lateral vibration and deformation of the rotor. However, stiffness nonlinearity is not well studied in splined rotors because of the lack of a fully analytical model.

Characteristics of spline-coupling

The study of spline-coupling involves a number of design factors. These include weight, materials, and performance requirements. Weight is particularly important in the aeronautics field. Weight is often an issue for design engineers because materials have varying dimensional stability, weight, and durability. Additionally, space constraints and other configuration restrictions may require the use of spline-couplings in certain applications.
The main parameters to consider for any spline-coupling design are the maximum principal stress, the maldistribution factor, and the maximum tooth-bearing stress. The magnitude of each of these parameters must be smaller than or equal to the external spline diameter, in order to provide stability. The outer diameter of the spline must be at least 4 inches larger than the inner diameter of the spline.
Once the physical design is validated, the spline coupling knowledge base is created. This model is pre-programmed and stores the design parameter signals, including performance and manufacturing constraints. It then compares the parameter values to the design rule signals, and constructs a geometric representation of the spline coupling. A visual model is created from the input signals, and can be manipulated by changing different parameters and specifications.
The stiffness of a spline joint is another important parameter for determining the spline-coupling stiffness. The stiffness distribution of the spline joint affects the rotor’s lateral vibration and deformation. A finite element method is a useful technique for obtaining lateral stiffness of spline joints. This method involves many mesh refinements and requires a high computational cost.
The diameter of the spline-coupling must be large enough to transmit the torque. A spline with a larger diameter may have greater torque-transmitting capacity because it has a smaller circumference. However, the larger diameter of a spline is thinner than the shaft, and the latter may be more suitable if the torque is spread over a greater number of teeth.
Spline-couplings are classified according to their tooth profile along the axial and radial directions. The radial and axial tooth profiles affect the component’s behavior and wear damage. Splines with a crowned tooth profile are prone to angular misalignment. Typically, these spline-couplings are oversized to ensure durability and safety.

Stiffness of spline-coupling in torsional vibration analysis

This article presents a general framework for the study of torsional vibration caused by the stiffness of spline-couplings in aero-engines. It is based on a previous study on spline-couplings. It is characterized by the following 3 factors: bending stiffness, total flexibility, and tangential stiffness. The first criterion is the equivalent diameter of external and internal splines. Both the spline-coupling stiffness and the displacement of splines are evaluated by using the derivative of the total flexibility.
The stiffness of a spline joint can vary based on the distribution of load along the spline. Variables affecting the stiffness of spline joints include the torque level, tooth indexing errors, and misalignment. To explore the effects of these variables, an analytical formula is developed. The method is applicable for various kinds of spline joints, such as splines with multiple components.
Despite the difficulty of calculating spline-coupling stiffness, it is possible to model the contact between the teeth of the shaft and the hub using an analytical approach. This approach helps in determining key magnitudes of coupling operation such as contact peak pressures, reaction moments, and angular momentum. This approach allows for accurate results for spline-couplings and is suitable for both torsional vibration and structural vibration analysis.
The stiffness of spline-coupling is commonly assumed to be rigid in dynamic models. However, various dynamic phenomena associated with spline joints must be captured in high-fidelity drivetrain models. To accomplish this, a general analytical stiffness formulation is proposed based on a semi-analytical spline load distribution model. The resulting stiffness matrix contains radial and tilting stiffness values as well as torsional stiffness. The analysis is further simplified with the blockwise inversion method.
It is essential to consider the torsional vibration of a power transmission system before selecting the coupling. An accurate analysis of torsional vibration is crucial for coupling safety. This article also discusses case studies of spline shaft wear and torsionally-induced failures. The discussion will conclude with the development of a robust and efficient method to simulate these problems in real-life scenarios.

Effect of spline misalignment on rotor-spline coupling

In this study, the effect of spline misalignment in rotor-spline coupling is investigated. The stability boundary and mechanism of rotor instability are analyzed. We find that the meshing force of a misaligned spline coupling increases nonlinearly with spline thickness. The results demonstrate that the misalignment is responsible for the instability of the rotor-spline coupling system.
An intentional spline misalignment is introduced to achieve an interference fit and zero backlash condition. This leads to uneven load distribution among the spline teeth. A further spline misalignment of 50um can result in rotor-spline coupling failure. The maximum tensile root stress shifted to the left under this condition.
Positive spline misalignment increases the gear mesh misalignment. Conversely, negative spline misalignment has no effect. The right-handed spline misalignment is opposite to the helix hand. The high contact area is moved from the center to the left side. In both cases, gear mesh is misaligned due to deflection and tilting of the gear under load.
This variation of the tooth surface is measured as the change in clearance in the transverse plain. The radial and axial clearance values are the same, while the difference between the 2 is less. In addition to the frictional force, the axial clearance of the splines is the same, which increases the gear mesh misalignment. Hence, the same procedure can be used to determine the frictional force of a rotor-spline coupling.
Gear mesh misalignment influences spline-rotor coupling performance. This misalignment changes the distribution of the gear mesh and alters contact and bending stresses. Therefore, it is essential to understand the effects of misalignment in spline couplings. Using a simplified system of helical gear pair, Hong et al. examined the load distribution along the tooth interface of the spline. This misalignment caused the flank contact pattern to change. The misaligned teeth exhibited deflection under load and developed a tilting moment on the gear.
The effect of spline misalignment in rotor-spline couplings is minimized by using a mechanism that reduces backlash. The mechanism comprises cooperably splined male and female members. One member is formed by 2 coaxially aligned splined segments with end surfaces shaped to engage in sliding relationship. The connecting device applies axial loads to these segments, causing them to rotate relative to 1 another.