Rotary Crusher
Rotary Crusher initially found in the 1960s in the Federal Republic of Germany, as foreign demand large mine large machinery, which has just come out of rotary breakers not to develop. The early 1980s, due to the rapid development of small and medium-sized mines, some researchers in China began to carry out further rotary breakers Development.
It is well known that the broken equipment is good or bad depends on the crushing chamber design, crushing chamber to the productive capacity of equipment, power, steel consumption and fragmentation of product quality, and other important performance indicators. Rotary Haishi machine mainly by the Rotary Roll, suspension, the insurance unit, adjusted agencies, tensioning device, the rotation system and rack components, fixed by its crushing chamber concave broken boards and broken rotary roll composition. Materials broken through the rotary roll eccentricity to complete the operation, the crushing chamber angle rodents with static and dynamic changes in function. The rodents aircraft crushing chamber angle is decreased gradually from top to bottom, which can effectively prevent nesting mouth plug, nesting smooth, and can achieve high frequency broken, and the fragmentation process is gradual and, therefore, broken power and high energy concentrated, wear small.

PH-type rotary machine gravel crusher role broken rotary occurred in the vicinity of roller eccentric position, the eccentric shaft to break cavity eccentric side, the crushing chamber in order materials from top to bottom was broken. Relying mainly on the broken materials extrusion, Split, bending, grinding, and other role. When the eccentric turn away from crushing chamber, the pass has been broken by the nesting materials from the mouth. Nesting process, first, from the gravity of natural nesting, and the second is on "mandatory nesting" [15].

Broken roll can be compared with eccentric shaft rotary freedom, according to the size and role of torque direction, a positive turn of roller (with the same eccentric axis rotation), and not to reverse three kinds of state, also have speed-speed of this can be effective in breaking roller surface wear uniform. Rotary Crusher rodents with variable angle, high-density broken, followed by gradual fragmentation, high-frequency markers broken and mandatory features.
Dual-chamber rotary breakers

In order to better play the role of rotary breakers, PH Crusher auxiliary crushing chamber into the crushing chamber and symmetrical form, which is dual-chamber rotary breakers. Southern-central Industrial University Professor Zhang Zhi Rail rotary breakers claiming to be a variable angle rodents rotary jaw crusher that is the compound pendulum jaw crusher deformation to replace compound pendulum Jaw Crusher [16].

Dual-chamber rotary formally Beijing Beijing Seahawk mine engineering equipment companies XU Zheng - First, the eccentric rotary roll crusher further development, can be used to replace the existing minor or super-minor jaw crusher or small and medium-sized specifications Cone Crusher [17, 18].

Dual-chamber rotary grinder has the following advantages:

(1) rotating roller crusher was put to positive and negative, so that the broken material more effectively,

(2) symmetry of the cavity created so that the process of crushing the air itinerary shortened, production increased by approximately 30% to 40%, PSH Series dual-chamber rotary break broken machines used because of broken roll wear-resistant welding of high strength can be broken compressive strength of 600 MPa and above the material, alumina content 87.5% of the refractories, can be easily broken.

Beijing Beijing Seahawk mine engineering equipment company five ying PSH Series dual-chamber rotary crusher (Figure 14, Figure 15), with the same specifications as compared jaw crusher, the machine capacity than jaw crusher nearly doubled energy consumption reduced 40%, steel consumption decreased more than 50 percent, broken uniform product size distribution, particle size strict, a cube-shaped tablets shape it in mine construction stone crushing and processing areas show a good prospect. Meanwhile, PSH rotary breakers work vibration small, smooth, no-load noise and compared to the jaw crusher to reduce 30 percent.