Nigeria is rich is solid mineral resources, such as: Kaolin, gypsum, mica, clay, tantalite, iron ore, gemstone, silica sand.
Read More
Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
Read More
By absorbing the advanced technology from the world, we researched and designed PF series impact crusher.…
Read More
Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
Read More
Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
Read More
The vibrating screen is a kind of sieving equipment of international advanced level, developed by our…
Read More
Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
Read More
High-frequency vibrating screens usually operate at an inclined angle, traditionally varying between 0° and 25° and can go up to a maximum of 45°. They should operate with a low stroke and have a frequency ranging from 1500 to 9000 RPM. Frequency in High frequency screen can be fixed or variable.
Details
Experiment on cavitation-vibration correlation of a centrifugal pump under steady state and start-up conditions in energy storage station. ... respectively. The pump has a wide operating range with relatively high efficiency. At the design point, the pump head is 6.94 m, and the pump efficiency is 67.13 %. Download : Download high-res …
Details
Under the same vibration parameters, the transportation capacity of the composite vibrating screen material was stronger, and its same-time processing volume was 1.61 times that of the linear vibrations; the screening efficiency of composite vibrating screens was 93.75%, while that of the linear vibrating screens was 90.7%, an increase …
Details
In this study, a typical rotary vibrating screen is used - a vertical-motor system, with eccentric hammers being installed on top and bottom of the machine, as shown in Fig. 3 (a), where the motor acts as the excitation source combined with the power and vibration source.The direction of the eccentric hammers may change their rotational …
Details
In this paper, a stepwise optimization method is employed to optimize the screen surface shape of the vibrating screen in discrete element modeling to obtain a high screening efficiency and large processing capacity simultaneously. Adopting this optimization method, a new curved screen with five decks having various inclination …
Details
The superposition of a vibration in one axis was chosen to keep the interpretation of the manufactured wheel topography as simple as possible. A targeted vibration in the grinding process was achieved by excitation with an electrodynamic shaker. Relevant mode shapes and eigenfrequencies were determined by an …
Details
The angle of vibration of the working members and the ratio between the amplitudes of horizontal and vertical oscillations can be changed according to the technological requirements by changing ...
Details
Material travel speeds vary from 0 to approximately 100 ft. per minute, depending on the combination of frequency, amplitude, and slope vibration angle. The installation of vibrating feeders in over 300 power plants has proven the reliability and economical construction for these feeder units.
Details
Objective: Find the complex vector Z, the magnitude A, and phase angle 8 of the displacement. Also determine the phase angle ¢2 relative to the key phasor if the reference mark is at 135 degrees. Solution: The magnitude is A= 1z1= Jx 2 + Y 2 =Joi+ c-2)2 A = 2.24 mils = 0.00224 inches (0.0569mm) and the phase angle relative to the x axis as 8= …
Details
The optimal position design of viscoelastic supports is studied for vibration attenuation of a beam under a harmonic excitation. By attaching the supports properly to the structure, the dynamic deflection of the steady-state response can be significantly suppressed. ... Table 3 lists the vibration results in different excitation frequencies ...
Details
2.1 Structure design. Figure 1 shows the schematic diagram of the proposed HVEH, where Fig. 1a shows the energy harvester with a top plate and four springs. In order to show the internal structure clearly, Fig. 1b is without the top plate and springs. This HVEH mainly consists of a PVEH and an EVEH, where the PVEH is produced by PZTs pasted …
Details
The effects of the junction angle on the bandgap are further analyzed. The results demonstrate that a low-frequency and wide bandgap can be achieved by adjusting the lattice constant and junction angle, which gain some insights into the design of multi-coupled angle beam structures from both the vibration control and noise reduction …
Details
The excitation force is circular, and the vibrating screen structure is supported by symmetrical damping springs with equal stiffness. Liu et al. [ 29 ] developed a linear model with three degrees of freedom in 3D that has an excitation force in the vertical direction and different damping spring stiffnesses in each support position.
Details
When we consider the free body diagram of the system, we now have an additional force to add: namely, the external harmonic excitation. Figure (PageIndex{1}): A mass-spring system with an external force, (F), applying a harmonic excitation. The equation of motion of the system above will be: [ m ddot{x} + kx = F, ]
Details
The beam element is widely used in the design of compliant mechanisms and is often used in mechanisms with large rotation angle and large stroke [24, 25]. Especially the Euler buckled beam is widely used in shock isolator, used as a negative stiffness mechanism [ 23, [26], [27], [28] ], and can absorb vibration energy harvesting [ [29], …
Details
In these cases, an approximate solution of the design-point excitation is obtained, which, if necessary, can be used as a 'warm' starting point to find the exact design point using an ...
Details
To demonstrate the effect of the trough angle on the vibration characteristics, Fig. 5 presents the model's solution for a brief time interval using standard trough angles, and assuming a ...
DetailsThe vibrating direction angle (denoted by α) is 45°. The maximum excitation force (denoted by F 0) and the angular speed (denoted by ω) of the exciter is 66340 N and 32.5π rad/s (i.e. 16.25 Hz), respectively. The stiffness coefficient of …
Details
Keywords: Exciters, unbalanced mass, steady state vibration, amplitude, frequency ratio, tests. -----***-----1. INTRODUCTION A vibration exciter is a machine which produces mechanical vibratory motion to test object. The exciters are designed to produce a given range of harmonic or time dependent excitation force and displacement through a ...
Details
1. Introduction. In the current state-of-practice of structural design, human activities are mostly treated as a part of live loads which are static forces exerted on structures [1].Although dynamic loads in the form of Fourier series are given in some design codes [2, 3], the effect of human structure interaction is ignored.The human-structure …
Detailsslope of the conveying surface in the trough or installation angle (°) β. vibration angle between conveying surface and induced vibration direction (°) ... in which amplitudes of vibration, excitation force, ... its significance in design of vibrating equipment. IE (I) J. MC, 75 (1994), pp. 114-119. Google Scholar [2]
Details
1. Introduction. As is well known, the vibration at low excitation frequencies (0.5–5 Hz) are the main risk factors for lumbago or backache, which seriously affect to mental and physical health of drivers and passengers and reduce their working efficiency studied by Paddan [1].In order to upgrade the ride comfort and safe for drivers and …
Details
Aiming at the problem of large vibration and noise of the two-stroke engine, Mohite and colleagues 4–6 used multibody dynamics and finite-element simulation tools to predict the vibration and noise generated by the two-stroke engine for motorcycle, which could effectively predict the vibration and noise in the early design stage and reduce …
Details
A basic fluidelastic excitation mechanism, of a type reported in an earlier paper, causes large whirling vibrations of tubes in model arrays when the flow velocity exceeds a critical value. The critical velocity is U = βf n D δ ρ m o δ n / ρ o D 2 where β, the threshold instability constant is a function of the tube pattern and spacing.
Details
Abstract. The reliability is a key factor for the design and manufacture of large vibrating screen. In the paper, we presented a new large vibrating screen with hyperstatic net-beam structure. Dynamic characteristic of the vibrating screen was researched and dynamic simulation method of large screening machines was explored.
DetailsA new composite vibrating mode is presented in this paper. Modeling and dynamic analysis are studied according to two-degree-. of-freedom systems theory. e effects of vibration parameters ...
Details
The dynamic response of a radio telpe structure under wind load excitation significantly impacts the accuracy of signal reception. To address this issue, this study established a parametric finite element model of a radio telpe to simulate its dynamic response under wind load excitation. An improved Latin hypercube sampling …
DetailsTherefore, it is of great significance to study the unsteady flow characteristics and analyze the flow-induced vibration characteristics of centrifugal pumps for the low vibration noise design of centrifugal pumps. Unsteady pulsating pressure is the main source of fluid excitation (Chen et al., 2018; Li et al., 2021b; Miao et al., 2020).
Details
The excitation in one direction results in the vibration in the three directions. Therefore, directly solving the vibration equations is very complex and due to the applied approximations and simplifications, the accuracy of the analytical solutions is low. Consequently, these solutions are insufficient for this study in which the effects of ...
DetailsIntroduction. A particular engineering design problem is to determine the equivalent static load for equipment subjected to base excitation random vibration. The goal is to determine peak response values. The resulting peak values may be used in a quasi-static analysis, or perhaps in a fatigue calculation.
DetailsOlhoff N and Du J Generalized incremental frequency method for topological design of continuum structures for minimum dynamic compliance subject to forced vibration at a prescribed low or high value of the excitation frequency Struct Multidiscip Optim 2016 54 1113-1141
Details
A wave is a traveling vibration that transfers energy from one place to another. There are many different types of waves: light waves, sound waves, water waves, gravitational waves, seismic waves, and more. The term periodic oscillation refers to the types of motion that waves make. This is a repeating pattern that causes many wave properties.
DetailsIn this paper, vibration of imperfect resonators for vibratory cylinder gyroscopes is investigated. A model of the vibration based on the wave superposition is established. For an imperfect resonator, the principal stiffness axis does not coincide with the driving electrodes, so the primary mode and the secondary mode of the resonator …
Details
• Harmonic vibration of SDOF systems – Undamped SDOF systems – mu¨ +ku = P(t) = P 0 sin(ω pt) (23) where ω p is the loading frequency. The particular solution is u p(t) = P 0 k · 1 1− ω p ω n 2 sin(ω pt) (24) In harmonic vibration, due to the nature of external loading P(t), the complete solution represents the sum of two states ...
DetailsExcitations for Hull Girder Vibration: 1) Excitation – Low Speed Main Diesel Engine: A low speed main diesel engine has always been the primary source of vibrations in the hull girder. The excitation …
Details
expressed by Eq. (9), neglecting the small rotation angle.(13) 1 1 1 2 a Ma L F tt ⋅⋅ = − (9) Here, M is the total proof mass, t and 1t are the wafer thickness and vibrating beam thickness, respectively, and L is the distance between the center of gravity of the proof mass and the hinge center. The inertial force is magnified by a factor ...
Details
5.1.1 Examples of practical vibration problems . Vibration is a continuous cyclic motion of a structure or a component. Generally, engineers try to avoid vibrations, because vibrations have a number of unpleasant effects: • Cyclic motion implies cyclic forces. Cyclic forces are very damaging to materials.
Details
This study investigates the vibration transmission and suppression of a laminated composite panel with variable angle tow (VAT) designs and an attached inerter-based passive nonlinear energy sink. Based on analytical and numerical methodologies, the substructure technique is used to obtain a steady-state dynamic response and the …
Details
A new type of NES, which is termed as track NES, is proposed in this paper. The optimal mass ratio and track shape expression of NES were determined based on a preliminary optimization design process. To verify its vibration control effects on building structures, a series of shake table tests were conducted on a five-story steel frame.
Details
3. The included angle of eccentric block is too small. If the motor adopts vibration motor, the included angle of the eccentric blocks at both ends of the motor shaft will also affect the amplitude. If the included angle decreases, the excitation force will increase, and the amplitude will increase. Otherwise, the amplitude will decrease.
Details
Sofol is a well-known crusher and grinding mill manufacturer that offers equipment and solutions for customers from aggregates, mining and mineral grinding industry.
You can leave your message here, we'll send you an Email immediately.
Online ChatCopyright ©2000- 2024 Shanghai Sofol CompanySitemap
PE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
GET QUOTE