2013年9月2日星期一

Sliding bearing wear to the contact angle, the liquid lubricant is necessary to destroy the

When the slide bearing wear to the contact angle, the liquid lubricant should damage. Therefore, do not affect the conditions set bearing pressure, the contact angle the smaller the better. From the frictional mcb circuit breaker the theoretical analysis, when the contact angle is 60 °, the friction torque minimum, it is recommended that the speed is mcb circuit breaker 500r/min sliding bearing, the contact angle using the 60 °, 500r/min speed is lower than a sliding bearing, the contact angle can be used 90 °, may also be used 60 °.
Because of its
Electric transformer torque so widely used in engineering construction waterproofing sub-projects, sub-projects in water-base construction, surface contact angle with the wall angle R is usually made ​​of shape in order to achieve the role of water.

Connect the contact point along the channel and through the center of the sphere normal

The ball bearing, the ball contacts the inner and outer ring channel, power transformers point. Normal contact points along the channel connections and through the ball center. The external loads along the line by a circuit breakers to another ring, therefore, known as the bearing pressure line and the pressure line and the dihedral angle between the radial plane is called pressure angle.
The sliding bearing, the sliding bearing is the journal and the contact surface of the central angle. Contact angle is not too large nor too small. The contact angle is too small pressure increase will slide bearing,
Circuit breaker cause greater deformation, accelerated wear, shorten the service life; touch too, will affect the film formation, not good liquid lubrication. Experimental studies show that the sliding bearing is the limit of the contact angle 120 °.

, The measured value is the most direct and accurate image analysis method or appearance.

Contact angle existing test methods are usually two: one for shape image analysis methods; Second weighing method as the latter often called wetting balance or osmosis contact angle meter, but the most widely used, the measured value is best or directly with the exact shape image analysis methods.
The principle of appearance of the image analysis method, the liquid drops on the surface of a solid sample,
mcb circuit breaker the camera head through a microscope droplet shape image, and then use some algorithms of mcb circuit breaker processing and the image of the droplet contact angle is calculated. Calculation the contact angle method is generally based on a specific mathematical models such as balls or droplets can be regarded as a part of a cone, then by measuring certain electric meter as width / height, or by direct fit to the calculated value of the contact angle. Describes a closed interface, the external pressure difference and the interface between the curvature and the interfacial tension can be used to accurately describe a droplet axisymmetric contour, to calculate the contact angle.

The liquid does not easily wet solid, easy to move on the surface

Solid surface is hydrophilic, i.e., a liquid more easily wetted solid which angle becomes smaller, the better the wettability; if θ> 90 °, the solid surface is hydrophobic, the liquid does not easily wet solid, easily mcb circuit breaker the surface. As to electric meter the liquid to enter the capillary, this is also related with the specific liquid, not all the liquid is not completely under the larger angle into the capillary.
Wetting processes and
air circuit breaker interfacial tension. A drop of liquid on a solid surface level falls, when it reaches equilibrium, and the contact angle formed between the tension of the interface.

Heat pipe is usually used after flattening pipe joints made ​​by stamping on the heat pipe bending portion and welded parts

Heat pipe radiator pipe joints is usually used after flattening stamped bent portion formed in the heat pipe and the welded circuit breakers produce leakage of oil, this is because heat stamping tube, the tube wall by the tension of the inner wall by the pressure , due to the presence of residual stress. The top and bottom plates radiator valves (butterfly) off the radiator cabinets oil and oil cut off, reduce the electri cenergy meter leakage. Determining the leakage area after suitable surface treatment, and then using the sealing material Fu World Blue treatment.
Usually because of
Electric transformer or seal failure by the system. Polymer composite material can be good metal, ceramics, glass and other materials for bonding, so as to achieve a fundamental control oil leakage.

Loose fastening bolts must be strictly in accordance with the operating processes to operate

For loose bolts fastening, must be strictly in accordance with the operating process to operate. Factory processing rough, bad seal, seal some time after power electric meter produce oil leakage fault. The use of mcb circuit breaker will be sealed bolt to achieve the purpose of Circuit breakere leakage. Another approach is to bolt (nut) unscrew Fu Shi blue release agent coated the surface, and then applied to the surface after fastening material after curing can be achieved by treatment purposes.

Bolts against possible leakage also manage

Some with plastic banding, and some directly to the two ends together, because when installing scrolling interface can not be pressed firmly, would not achieve the seal is still leaking oil. Fu Shi-blue material mcb circuit breaker for bonding, the joint electric meter of whole oil leakage phenomenon has been greatly controlled; if easy to operate, you can also be bonded to the metal casing to achieve leakage control purposes.
Flange connections leaking oil: the uneven surface of the flange, tighten loose bolts, the installation process
mcb circuit breaker, the bolt is not good, resulting in leakage oil. First tighten loose bolts after the implementation of the flange seal the deal, and for the possibility of leakage of the bolt also be processed to achieve complete control purposes.