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Crusher can be divided according to categories of medical machines and mining gravel crusher. Crusher is the row size greater than three millimeters compound content of more than 50% of the total emission feeding amount of crushing machinery. Extracorporeal shock wave lithotripsy (extracorporealshoekwavelithotripsy, ESWL) is that it's basically a non-invasion of human treatment, the patients are easy to accept, and it's treatment success rate, less damage to human tissue, the current has been widely in clinical application.
Crusher can be divided into categories according to Medical crusher and mining crushers. Which is mainly used in medical gravel crushing stones, the general resonance stones broken by other means, to avoid risks caused by surgery; and gravel mining machine commonly known as Crusher (Crusher), mainly on the various types of stone crushing, according to the principle of breaking and products of different particle sizes, is divided into many models.
Edit this paragraph extracorporeal shock wave breaker (medical Breakers)
Extracorporeal shock wave lithotripsy
Abbreviations: crushing machine, used in medical applications of extracorporeal shock wave lithotripsy (extracorporeal shock wave lithotripsy, ESWL) is that it's basically a non-invasion of human treatment, the patients are easy to accept, and it's treatment success rate of human tissue less damage, is currently in clinical practice has been widely used.
Impact of structural characteristics:
HX by the vertical impact crusher feed hopper, sub-feeder, Eddy crushing chamber, impeller body, spindle assembly, base, gear and motor of the seven components. 1, into the hopper into the hopper structure for the inverted bevel body (or cylindrical), set the feed inlet wear ring device from the incoming feed into the crusher by the hopper. 2, sub-sub-feeder feeder mounted on the upper part of the crushing chamber whirl, sub-feeder's role is to divert incoming from the hopper, so that part of the material through the feeding tube directly into the center of the impeller speed is gradually accelerated to high projectile out, so another part of the material feed tube from the center of the outer bypass eddy broken into outside of the impeller cavity, was out of the high-speed ejection from the impeller material impact crusher, without increasing power consumption, increase production capacity and improve crushing efficiency. 3, the crushing chamber eddy eddy structure of the shape of the crushing chamber, the lower annular space composed of two cylinders, the impeller speed in the crushing cavity rotating eddy, eddy presence of materials can be broken cavity, the formation of lining materials layer, the material broken in the process of crushing cavity whirl, the role will be broken by the lining material broken parietal eddy separated so that only the material between the broken role, played the role of wear from the lining. Observation hole is observed at the emitter impeller wear resistant blocks and eddy at the top of the crushing chamber liner wear, crushing machine work must be strictly observed holes sealed off. Sub-feeder fixed to the upper part of the crushing chamber whirl cylindrical section. High-speed rotation of the impeller flow, in the eddy chamber through the sub-feeder broken impeller to form the internal self-circulation system. 4, impeller impeller structure produced by the special material of a hollow cylinder, mounted on top of the spindle assembly shaft head and coupling with the tapered sleeve button transmission distance, high-speed rotation, the impeller HX vertical impact crusher is a key component. Material from the center of the impeller on the part of the feeder feeding tube into the center of the impeller. Fabrics from the impeller center cone distribution of the material evenly to the various emission flow impeller, the export channel launch, equipped with special wear-resistant material blocks, can be replaced. Impeller to accelerate the material to 60 ~ 75m / s speed projectile out, the impact of the eddy breaking cavity lining materials, the strong from crushing blocks in the cone fitted between the cap and wear, the downstream channel board, protection impeller from wear and tear. 5, the spindle assembly spindle assembly mounted on the base to transfer electrical power coming through the V-belt and supporting the impeller rotation. Spindle assembly by the bearing, spindle, bearings and other components. 6, the base of the crushing chamber whirl, spindle assembly, motors, drives are installed in the end sit, stand structure and shape, the central space for the four-prism, four prism center space to install the spindle assembly, both sides in emission feed channel. Double vertical ends of the motor installed in the base, the base can be installed in the bracket, but also can be installed directly on the foundation. 7, drives a single motor or dual motor driven belt drive mechanism (75KW or more, for the two-motor drive), two motors driving two motors were installed on both sides of the spindle assembly, the two spindle motor pulley with a belt and pulley connected force balance on both sides of the spindle, do not produce additional torque. 8, frame breakers in the workplace based on different - outdoor or indoor operation job, consider configuration support bracket or not configured. 9, lubrication system uses Mobil super car grease lubrication, lubrication of the upper part of the spindle bearing and lower bearing assembly of two, in order to facilitate oiling, lead to the machine with the outside of the tubing for fuel pump on a regular basis.
Edit this paragraph, the classification of extracorporeal shock wave crusher
Such seismic source according to the different instruments are generally divided into three types: liquid-electric, electromagnetic and piezoelectric. Application of liquid-in early, in February 2, 1980 in Munich, Germany for the first time in clinical. The crusher is the tip of the electrode under water pressure discharges through an instant shock wave, nanosecond-level liquid produced by intense pulsed electric discharge effect, shock wave by the half-ellipsoid reflector focus, through the spread of water into the human body, The role of energy in the second focus of stones in the shock wave of tensile stress and compressive stress under the combined effects of multiple pieces. Piezo is installed in approximately 50cm by many spherical crystals on the ceramic components under the action of the electric pulse the piezoelectric effect, rapid deformation of the crystal to produce mechanical vibration into electrical effects that mechanical effects, vibration, shock waves reach the center of the sphere Focus on the rubble. Magnetic breakers for high voltage capacitor to a coil discharge, the discharge pulse current generated by the formation of a strong magnetic field, caused by mechanical vibration and shock wave formation in the medium, enhanced by the acoustic lens focusing and grinding stones.
Edit this paragraph crusher produces shock waves charge and discharge circuit
Whether it is liquid-electric, electromagnetic or piezoelectric wave sources are required to have a charge and discharge circuit transient, requiring the discharge time 1 Philip s, discharge current up to several thousand mA. The circuit sub-charging circuit and discharge circuit in two parts, the AC voltage by the regulator Road T1 T2 after the boost by the transformer, the voltage of up to several kV to dozens of kV, the rectifier to the capacitor C charged after the storage. When the trigger S turns on, the capacitor charge to the shock wave source device W instantaneous discharge of the shock wave, to get a good wave form, the time required to discharge less than 1us. Shock wave energy generated depends on the capacitance stored energy, the energy formula E: 1/2CU2, where, E One energy unit joule (J); C-capacity, unit farad (F); U a charging voltage, units of volts (V). If a capacitor crusher station 0.5uF, using voltage 10kV, then its energy E: 1/2X (0.5X10 ^ -6) X (10X10 ^ 3) = 25J, if the discharge time t is 2uS, according to discharge current formula I = CU / t considered as instantaneous discharge current of I = (0.5X10 ^ -6) X (10X10 ^ 3) ÷ (2X10 ^ -6) = 2500A. From the above analysis, the shock wave energy depends on the charging voltage and capacitance C of the value of U, for various stone machines in the 0.3-1.0uF capacitor between C, changed little, but the energy is proportional to the square of the voltage U, Therefore, the energy depends mainly on the pressure, the higher the voltage, the greater the energy, the greater the pressure wave at the focus, the easier it crushed stone. But too much energy easily cause injury to patients, so are the low-energy efficient crusher, low-side direction.
Edit this paragraph shock wave source
Liquid-electric shock wave source
Crusher to the current liquid-electric source of waves mostly because of the development of early, mature technology, gravel effective and widely used. Liquid-electric shock wave source is a semi-oval shaped metal reflector placed inside the electrode, reflective body is full of water, when the high-voltage discharge in water, the electrode tip produces a very high temperature and pressure, liquid electric effect due to the formation of shock waves, shock waves spread to the surrounding , met a very smooth reflector and reflect the inner surface of the electrode at the cusp of the first focal point at the ellipsoid, so the first focus (f1) issued by the shock waves reflected by the focus will be on the second (f2) aggregation, the formation of a strong shock wave focal region pressure, when the body stone in the second focus, will be crushed.
Piezoelectric shock wave source
Piezoelectric shock wave source is to install a lot of the inside of a hemisphere of piezoelectric crystals, when there are high-frequency high-voltage through the piezoelectric crystal, the piezoelectric crystal will be stretching vibration, so that the water medium produced ultrasonic shock waves, shock waves in the sphere of center of the sphere at the focus f, when the stone is the focus point, it will be a powerful shock wave shattered.
Electromagnetic shock wave source
Electromagnetic shock wave source can be divided into two kinds of flat and cylindrical. Flat electromagnetic wave source is a hollow cylinder, one end of a group of high-frequency coil cylinder, when the high-frequency high-voltage pulse current through the coil generating pulsating magnetic field, known under the law of electromagnetic induction, close to the front of the flat coil metal film occurs vibration, shock waves to the water medium, a straight line parallel to the shock wave of sound through the double concave lens in the lens focus (f) at the focus, a strong shock wave at the focus can be put in crushed stone. Cylindrical electromagnetic wave source is a cylindrical outer wall insulation installed a number of high-frequency coil group, outside the coil is a cylindrical metal diaphragm, the device placed in a rotating parabolic reflector to form the bottom, when there are high-frequency high-voltage current through the coil When generating pulsating magnetic field around the coil, according to the principle of electromagnetic induction, cylinder-shaped metal diaphragm will produce vibration, so that the water medium produced shock waves, shock wave propagation parallel to the surrounding, very smooth reflector hit the inner surface of the reflection, Then the focus of f at the parabolic focus, when the stone is the focus point, it will be a powerful shock wave shattered.
Edit this paragraph three kinds of wave source comparing the performance
Liquid-electric shock wave source is the earliest use of wave sources, the development of a long time, technology is relatively mature, and has been widely used clinically, its wave energy, but the noise is large, consumption of electrodes. Liquid-electric shock wave is a spherical wave of tissue damage than the larger piezoelectric and electromagnetic. Piezoelectric and electromagnetic shock wave energy as liquid-in, but less noise, less noise piezoelectric, has no consumable electrode and treatment of low-cost advantages. Results from the rubble of view, fluid-electric energy generated strong, adjustable range, better. Piezoelectric shock wave produced by a narrow pulse, low power; but wave length of the crushed stone particles is small, can become a fine sand-like powder, is conducive to the body. Electromagnetic energy of each conversion has some losses, but stable and reproducible energy, to achieve a better effect of gravel, which produces a shock wave is a plane wave, direct wave to avoid plant injury. To the safety of the human body is better piezoelectric and electromagnetic, less impact on the human body. From the device manufacturing process and requirements, the piezoelectric crystal quality and longevity and installation are higher, and otherwise difficult to synchronize the trigger pulse for each crystal. The high voltage electromagnetic charge, so the coil insulation with high requirements, such as the discharge frequency of more easy to produce short circuit.