Introduce Demand curve of Drum gear coupling

      Drum gear coupling what are the requirements for the drum of curve? Non conjugate tooth surface of drum tooth surface is composed of different end section gradually phase stacked, the dotted line quality formation and axial coordinates curve called drum, drum curve is an important geometric parameters of drum type gear coupling.
    Crowning curve is a circular arc, are also useful for three sections of circular arc, the circle is called circular arc drum drum, the drum of curve, circle center of the gear axis, not in the axis of the drum; a circular center and the tooth surface spherical center of coincidence, there are do not coincide, usually the design is based on the experiences, in general, Ling Si drum gear coupling should meet the following requirements:

Fluid Couplings

    1.In the shaft angle is the maximum does not appear when the edge contact phenomena;
    2.The tooth concentrated load smaller is better, and the tooth surface curvature and the drum is proportional to the degree of PI, therefore bulge radius is as large as possible.
    Crowning curve radius of curvature and the internal gear unilateral reduction Bo Liangcheng proportional, therefore bulge radius should be as large as possible.
     Crowning curve radius of curvature and the internal gear unilateral reduction is proportional to the Bo Liangcheng, that it is related with the meshing clearance of tooth, thinning volume may cause interference, thinning will weaken the strength of tooth, and the backlash of great.
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Technical requirements of Mechanical Seal

     The sealing ring is a movable ring and the static ring (the same below), which is composed of the main componentsof mechanical seal. Sealing ring determines theperformance and the service life of mechanical seal, to a great extent, therefore, puts forward some requirements for it.

      Have sufficient strength and rigidity.

     Under working conditions (such as pressure, temperatureand sliding speed) do not damage, deformation should be as small as possible, working condition fluctuation can still maintain the seal. Especially the seal must be of sufficient strength and corrosion resistance, to ensure that products are satisfied with the service life.

mechanical seal

     Have good ability of resistance to thermal shock

    Therefore, the requirements of the material with high thermal conductivity and low linear expansion coefficient,heat shock bearing without cracking.

     Smaller friction coefficient.

    Sealing ring friction coefficient matching should besmaller.

     Good self lubrication

    A short period of time such as occurs in dry friction, does not damage the sealing surface. Therefore, the sealing ring should have good self lubrication, sealing materials and sealing fluid also has good wettability.

    Simple structure

    Sealing ring structure simple symmetry, give priority towith the integral structure, can also be a combined (such as inserting type sealing ring), try to avoid using seal facespraying type structure.

     The sealing ring must be easy to manufacture

     Installation and repair convenience, low price to.

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Common fault of Drum Gear Coupling and solving method

    The common faults

    1.Drum gear coupling center deviation is too large, the relative displacement of tooth surface;

    2.Poor materials, tooth surface hardness is too low;

    3.Inadequate lubrication or dry grinding;

    4.The oil is not clean;

    5.Drum gear coupling gear design is not reasonable,tooth interference or processing accuracy is not high;

    6.Install the interference caused by excessive top gaptoothed;

   7.Poor quality oil, oil containing acid or sulfide etc.;

Pin  Coupling

   Solution

   1.The first correction center;

   2.Choose the appropriate material, tooth surface hardness after the treatment of HRC in 50-60;

   3.Check the amount of oil, the oil pipe alignment position;

   4.Filter oil, the maximum size of the oil containing impurities is less than 25um;

   5.The good performance of the drum gear;

   6.According to the requirements of the installation of various drum gear coupling, check the internal, external tooth radial clearance;

   7.Replacement of lubricating oil etc.

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Comparison of characteristics of Chain Drive and Gear Drive

The features of chain drive:
1.Only to drive with parallel shaft sprocket.
2.Instantaneous transmission ratio is not constant.
3.Suitable for the long distance transmission, can work well in harsh environments.

Driving Chain

The characteristics of gear:
1.High efficiency. Such as the level of cylindrical gear transmission efficiency can reach 99%, has great economic significance.
2.The compact structure. Gear drive the required space size is generally small.
3.Reliable work, long service life. Gear service life can be as long as twenty years.
4.Stable transmission ratio.
   Compared with a gear drive, chain drive requirements and installation of manufacturing accuracy is low, low cost; in the long distance transmission, the gear transmission structure than the lighter and more convenient; the requirements on the working environment is relatively low.
   Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. We can supply a full-range of power transmissions products, such as chains,Motorcycle Chain, engineering chain,sprockets and plate wheels,Stainless Steel Sprockets, pulleys, gearboxes, motors, couplings, gears and racks. Our product range also covers locking assemblies (clamping elements/locking device), taper bushes, QD bushes, bolt-on hubs, torque limiters, shaft collars, motor bases and motor slides, chain detachers, chain guides, universal joint, rod ends and yokes. Our products are used in many different industry sector, like in automation engineering, drive engineering, conveyor technology, assembly and handling technology, packaging industries, the beverage, food and medical engineering, pharmaceutical production, and laboratory equipment.

Silent chain and Comparison of Roller Chain

   If the motorcycle engine overhead camshaft, usually by the small sprocket on the crankshaft is driven by the chain link machine, also is we often say that the chain.
    A general two:
   1.Roller chain: structure with the motorcycle rear wheel drive chain, only small size, low cost of the chain structure, but when the engine is running howling noise will be relatively large, especially the gas engine speed increases obviously, will hear the whistling.

Silent Chain

   2.The tooth shaped chain: also called the silent chain, its structure is more complex than the roller chain sprocket tooth shape, and with a good, running up the quiet. A disadvantage is the higher cost.
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Describes the characteristics of Ball Screw Support

    Ball Screw Support is the rotary motion into linear motion, or linear motion into rotary motion of the desired product. Ball Screw Support by the screw, nut and ball composition. Its function is to convert rotary motion into linear motion, which is a further extension of the ball screw and development, the importance of this development is that the bearing moves into a sliding operation from the scroll. With little friction, Ball Screw Support are widely used in various industrial equipment and precision instruments.
    Feature
    Sliding screw vice and the driving force compared to 1/3
As the ball screw nut screw between the screw shaft and the ball was doing a lot of rolling motion, they are able to get higher efficiency of movement. Sliding past compared to ball screw drive torque of 1/3 or less, that to achieve the same movement as the result of the power needed to use the scroll ball screw 1/3. Helpful in saving.
   Ensure high-precision
   Ball Screw Support is generally used the world's highest level of consistent production out of machinery and equipment, especially in the grinding, assembly, inspection of the process plant environment, temperature, humidity were strictly controlled, because a sound quality management system so that accuracy can be fully guaranteed.

Ball Screw Support Set

   Micro-feed may
   Ball screw is the use of ball movement, so very small starting torque, does not appear like sliding movement creeping phenomenon, to ensure accurate micro feeding.
  No backlash, high rigidity
Ball screw can be added with preload, since the pre-axial clearance can achieve negative pressure, then get a higher rigidity (the ball within the ball through to add to the pressure, and other mechanical devices used in practice, due to the repulsion ball nut can increase the rigidity of the Ministry of [a] strong).
  High feed may
   Ball, sport, high efficiency, small heat, so you can achieve high-speed feed (movement).
  Precision tolerance: P5. P7
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The basic definition and composition of Mechanical Seal

    With mechanical seal (mechanical seal) is defined by at least one pair of end faces perpendicular to the rotational axis of the fluid pressure and the compensation mechanism in the stretch (or magnetic) and the secondary seal under the action of the combination with the paste to maintain the relative sliding constituted to prevent fluid leakage of the device. Elastic Load institutions and secondary seal is metallic bellows mechanical seal we call metal bellows seal. In light seals, rubber bellows also used as an auxiliary seal, rubber bellows stretch limited, generally need to be supplemented to meet the load spring stretch. "Mechanical seal" that is often referred to as "mechanical seal"

Mechanical Seals for FGD

   Basic definitions
   Rotating mechanical seal is a mechanical seal device. Such as centrifugal pumps, centrifuges, reactors and compressors and other equipment. Through the shaft and outside the device, so that the shaft and a circumferential gap exists between the device, the device of the media leak out through the gap, if the pressure is below atmospheric pressure within the device, the internal leakage of air into the device, so there must be a seal means to prevent leakage.
   Many different types of shaft seal, due to the mechanical seal has less leakage and long life, etc., so the mechanical seal is the world's most important in these devices shaft sealing manner. Mechanical seals known seal, the national standard is defined as: "by at least one axis of rotation perpendicular to the end face of the fluid pressure and the compensation mechanism in the stretch (or magnetic) the role of the secondary seal is maintained with the combined paste constituted by the relative sliding of the device to prevent fluid leakage. "
Composition
  Main components
  Ring and stationary ring.
  Secondary seal
  Ring (with O-ring, X-shaped, U-shaped, wedge-shaped, rectangular flexible graphite, PTFE coated rubber O-rings, etc.).
  Elastic compensation mechanism
  Springs, thrust ring.
  Spring seat and key, or a variety of screws.
  Into a single face, double-sided, balanced, unbalanced, arbitrary rotation, fixed rotation. .