Product Description

Vacuum Ceramic Disc Filter for Mineral Tailings Sludge Dewatering Sewage Treatment

-High mechanical strength
-Resistance to high temperatures
-Resistance to microbiological influence
-Resistance in aggressive environments
-High regeneration ability

-Maximizing Throughput Capacity
-Reduced Maintenance Costs
-On-Line Availability Maximum Life Span
-Optimizing Process Control
-Minimum Final Cake Moisture & Maximum Filter Productivity
-Maximizing Overall Performance

 
Product Description:
 
Ceramic filter is mainly used for fine coal slurry recovery, equipped with an engine base, under the engine base setting a fine coal slurry liquid trough, in this liquid trough, equipped with liquid level controller, both ends with negative pressure water tank, 1 side of this water tank is equipped with negative pressure connected assembly fix, another side is vacuum pump pipeline connecting with a vacuum pump; on the engine base, there is a coal slurry recovery rotor, this rotor consists of main axle, multilevel ceramic filter disc, stripper plate, multisection effluent connecting pipeline piping support plate, negative pressure connecting assembly plate. The rotor is located in liquid trough; the ceramic filter disc consists of many ceramic cavity micropore plates, those plates located in a same axes connect by the effluent connecting pipeline.

Main Structure:
 
  Ceramic filter is mainly consisting of roller system, mixing system, ore slurry feed and discharge system, vacuum system, filtrate discharging system, scraping system, back washing system, united washing system (ultrasonic cleaning, automatic matching acid cleaning), full-automatic control system, trough body, rack etc.

Trough body uses corrosion resistant stainless steel, can load ore pulp. Stirring system is stirring mixing materials in trough body to avoid the rapid subsidence of materials. Ceramic filter plate is installed on roller, roller can be rotated by the drive of stepless speed change reduction gears.
 
Filter medium of ceramic filter is ceramic filter plate, doesn’t need filter cloth, that reduces cost of production. The 1mm gap between scraper and filter plate prolongs the service life while discharging.
 
Using back washing and united cleaning etc. methods, full-automatic control by PLC, equipped with inverter, liquid level meter etc. device. While starting up, ore pulp valve is monitored by level meter, it controls height of ore pulp level. When to high level, PLC control system rapidly opens filtrate pump outlet valve to drain water quickly. Ceramic can use long-range control or centralized control according to different requirement by customers.

Structure and Effect:
 
Ceramic filter is mainly consisting of roller system, mixing system, ore slurry feed and discharge system, vacuum system, filtrate discharging system, scraping system, back washing system, united washing system (ultrasonic cleaning, automatic matching acid cleaning), full-automatic control system, trough body, rack etc. Every system components and effect as follows:
 
   Roller system: consisting of main spindle, roller body; 1 side of main spindle connects driving motor, reduction gears, another side is cooperated with distribution head; on roller body, welding with annular plate, equipped with ceramic filter plate on it; ceramic filter plate is connecting with distribution head by pipeline. Roller system is the core of ceramic filter, it completes solid-liquid separation cooperated with vacuum system.
 
Mixing system: consisting of driving motor, reduction gears, horizontal axis, connecting rod, crank and rake frame, under the drive of actuating device, transmit power to rake frame by the parts, the rake frame which is immersed in ore pulp reciprocating wiggles, stirring ore pulp prevent it from precipitating.
 
Ore slurry feed and discharge system: mainly consisting of gas control rubber valve, liquid level meter and relevant pipeline. This system is cooperated with automatic control system, feeding part controls feeding rubber valve switch automatically according to presupposed liquid level, thus controls feeding quantity. Ore discharge part controls discharging rubber valve according to requirement of cleaning technology, realized ore discharging or storing.
 
Vacuum system: consisting of vacuum pump, filtrate tank and relevant pipeline. While vacuum pump is operating, it is formed vacuum in filtrate tank, 1 side of relevant pipeline connects with filtrate tank, another side is connecting with ceramic filter plate by distribution head, those make solid matter be adsorbed on filter plate surface and filtrate be absorbed into filtrate tank.
 
Filtrate discharging system: consisting of filtrate pump and relevant pipeline. While filtrate pump operating, filtrate in tank discharge from pipeline.
 
Scraping system: consisting of scraper, scraper frame and fixed bolt. To scrape filter cake on filter plate surface is the effect.
 
Back washing system: consisting of filtrate pump, cleaning pipeline, filter, reducing valve, relief valve and relevant pipeline. There is interval between scraper and filter plate for alleviating its attrition. After striking off filter cake, there is a material lamina remained on filter plate surface, to ensure the filter plate efficiency, a part of filtrate is sent back by filtrate pump, to back wash filter plate through cleaning pipeline and distribution head.
 
United washing system: consisting of sonicleaning (including supersonic generator and ultrasonic oscillatory plate) and acid washing (including acid storing box, acid pump and washing pipeline). After a certain working time of filter plate, filtering efficiency would be reduced because of blocking and other material adhesion, at this time, regenerate filter plate by united washing.
 
Full-automatic control system: consisting of PLC, touch panel, liquid level meter, frequency converter, magnetic valve, air-operated valve and other electrical components. Design working, cleaning and all kinds of technical parameter of ceramic filter according to material properties and customers’ requirements, realize full-automatic control, manual control, monomer or centralized control.
 
Trough body: loading filter material.
 
 
Rack: load bearing other components except filtrate pump and acid storing box.

Technical parameters:

Model	Filter plates (circle)	Plates number (block)	Cell volume (m3)	Installation power (kw)	Operation power (kw)	Dimension  (L×W×H)mm
BTC-1	1	12	0.4	7.6	6.6	2200×1950×1630
BTC-4	2	24	0.79	9	7.32	2450×2250×1830
BTC-6	3	36	0.94	10.5	7.98	2700×2250×1830
BTC-8	4	48	1.28	11.5	8.14	3040×2250×1830
BTC-12	6	72	1.79	13	12.96	3600×2250×1830
BTC-24	8	96	3.96	23	16.28	4450×2850×2250
BTC-30	10	120	4.6	25.15	17.95	5100×2850×2240
BTC-45	12	144	5.9	40	30.4	5700×3200×2500
BTC-60	14	168	8.1	43.81	30.37	6820×3200×2500

Vacuum ceramic filters are to be found in the following industries:

• paper making
• metallurgy
• water treatment
• chemical
• ore beneficiation process in mining (iron, gold, nickel, copper and quartz).

Company information:
 
 ZheJiang Better Enviromental Protection Technology Co.,Ltd,
 it is the largest environmental protection technology enterprise in ZheJiang Province, adopted the US technology,
with experience over 10 years on machinery, during the past decade, we won very good reputation among our customers all over the world, ,Turkey, Janpan, Saudi Arabia, Bangledesh, Iran, Iraq, Vietnam, Singapore, Maldives, Malaysia, Argentina, Comlombia, Ecuador, Mexico, Mongolia, UZ, etc, and got the National Patent for this product.
We are the sewage and waste treatment industry expert.
 
Hand in hand with BETTER, create a green homeland together!
 

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.