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发表于 2011-3-17 08:07
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来自: 中国江苏常州
磁粉离合器
Magnetic powder clutch by the transmission unit (input shaft) and driven unit (output shaft into the merger. In the space between the two groups of unit, fill a granular magnetic powder (Hugh about 40 microns) deposition. When magnetic coil nonconductive, torque transmission not from wonders in driven shaft, but if the coil electromagnetic electricity, because magnetic force function and attract magnetic powder produce sclerosis phenomenon, even after sliding between in the torque transmission.
Magnetic powder clutch is a kind of the superior performance of automatic control components. It with magnetic powder for medium for control means with exciting current, achieve control of braking or transferred major purpose. Its output in turn major and exciting current good linear relationship with speed or sliding and has nothing to do with fast response and simple structure, etc. Widely used in wire, cable, packaging, printing, paper and paper processing, textiles, rubber, leather, metal foil tape processing and other relevant coiling device tension automatic control systems. Magnetic powder clutch also used in the buffer starting, overload protection, speed, etc.
(1) high torque control
Torque control range is very wide, and high control accuracy, convey torque and exciting current into the right proportion, can achieve high precision control.
(2) excellent durability and long service life
Using heat resistance, abrasion resistance, resistance to oxidation and corrosion resistance super ultra alloy powder and long service life.
(3) stability super set torque characteristics
Magnetic powder magnetism gas characteristics, and poor powder mutual adhesion stability, sliding torque very stable, and the relative rotation several no relationship can abiding constant torque.
(4) continuous sliding operation use
Come loose hot effect excellent thermal deformation and adopt uniform cooling structure, plus the magnetic powder high heat resistance, allow links and braking power and sliding big power, can smooth sliding operation, and won't cause vibrations.
(5) link sleek, no impact
Links to the impact of the tiny, no impact on the smooth start and stop. And resistance torque is tiny, won't cause useless calorific value.
(6) suitable for high frequency operation
Response of quick and special quick cooling structure, suitable for high frequency operation use.
(7) lightweight, maintenance-free, long service life
The lightweight, use concise type of high-temperature coil and special grease bearings, and in the light of attrition easily impose wear-resisting armature and prolong service life special treatment.
Product features
1, magnetic powder clutch and brake is a kind of the superior performance of automatic control components.
2, with high linear, high-precision torque control.
Three, use high temperature resistant coil super alloy powder and long service life, no impact connected sleek, magnetic powder clutch
4, CNC precision manufacturing, high precision, the treatment is careful, excellent linearity, superior performance.
5, magnetic powder high purity, do not add black carbon powder, stable performance and long life.
6, aluminum alloy structure, with excellent thermal performance, good retreat magnetic, fast response.
7, smooth operation, at startup, operation, braking condition, no vibration, no shock, no noise.
8, torque and exciting current in the provision of torque range, as is proportional to the linear regulating elements.
9, output torque is constant, because torque size just depends on the size, and the current excitation has nothing to do with sliding speed.
10, close from frequent, fast response, higher frequencies, every minute can achieve 40 to 60 times, can be widely applied in rapid working status and high frequency occasion. 11, power magnification high, usable small exciting current control large transmission power, easy to realize automatic control.
12, smooth operation, at startup, operation, braking condition, no vibration, no shock, no noise.
13, overload protection, in torque overload situation, automatic sliding running play overload protection function.
14, small volume, light weight. Convenient installation and long service life.
Working principle:
1, coils of TCT static magnetic powder clutch and magnetic powder brake is control, to change the input current output of automation devices turn major.
2, when the coil no electricity, input shaft rotation, magnetic powder in the centrifugal force, under the action of pressure clamping ring attached to the output shaft wall, with input shaft no contact, at this time, for idling state.
3 and when the coil electrify, magnetic powder in the field of magnetic chain being under the function, thus making the output shaft and input shaft become a rigid and rotation and produced when sliding in overload, when for working state. So as to achieve the purpose of transmission torque.
Basic purpose
1, buffer starter, to stop using: when using the sleek characteristics and link set torque characteristics, namely the buffering effect of acceleration stability and not occur peak torque impact.
2, continuous sliding, tension control use
3, torque limit optimizations
4, high-speed response to use
5, power absorption use
6, positioning to stop using
7, with load simulation
8, can be used for torque transfer process of clutch function and torque braking effect.
9, suitable for constant tension control system, such as: printing machine, cutting machine, composite machines, coating machine, paper machine, wire drawing machine and cable winding machine, and sheet metal, strip, the film processing equipment and textile machinery, etc.
10, can replace ordinary clutch for machine, CNC from and rapid, computer, wide device of precision a line printer and mechanical.
11, as overload device, which can be applied to mine ascending machinery, lifting machinery and cement, steel and other mechanical equipment, can make the prime mover no-load startup, gradually loading, improve equipment load capacity.
12, stepless speed regulation, match on sensor and control circuit will realize stepless speed regulation, especially for high speed speed and medium-sized power fine-tuning speed system.
13, overload protection in, when work system accident, torque overload, clutch automatic sliding, thus protecting mechanical equipment and driving force.
Ansoft magnetic field analysis introduction
Mainly through Ansoft fem methods for electromagnetic field analysis, finite element method the biggest advantage is a universality, high precision, it can be analyzed the various questions such as electromagnetic electrical inductance and capacitance, directed flux density, eddy current, the distribution of the electric field,
1. Default Boundary Conditions
2. Vector Potential Boundary
3. Symmetry Boundary
4. Balloon Boundary
5. Master/Slave Boundary
6. Impedance Boundary
7. Resistance Boundary
2.3 solution method and steps of the electromagnetic field
In the electromagnetic field in solving Ansoft fem method is the basic method and the finite element method is a request solutions of regional fan.if the small region, these small area is called an "units" or "finite element", thus using linear or nonlinear method to solve every small area, then the result of the regional combined gets the entire region solution. Overall area is divided into the unit, the unit after calculating gains is very simple, it is only a few algebra operations in units, such as using linear interpolation method get units, and the value of the unknown point regional integration into a small regional peace. Finite element method in CAE fields especially stress analysis has more mature, electromagnetic field analysis process and stress analysis principle and process basic similar. Its principle is the object will handle a finite element first divided into, each unit covers a number of nodes, and then based on the vector magnetic potential or scalar magnetic potential solving certain boundary conditions and initial conditions in each node of the magnetic potential or potential, and then further solving out other relevant quantity, such as directed flux density, magnetic field intensity value, etc. The main analysis on this question Ansoft process is as follows:
(1) the definition of physical environment, including coordinate system unit setting, selection and finite element unit selection and instructions and material characteristics definition, etc.;
(2) geometric modeling of electromagnetic institutions, then to solve it areas use selected unit division, and the partition of the unit gave characteristics and Numbers;
(3) exert boundary conditions and load;
(4) to solve and post-processing. |
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