The screw pump is mainly composed of a bushing (pump cylinder) fixed in the pump body and an active screw rod inserted in the pump cylinder and two driven screws engaged with the screw rod pump. Three intermeshing screws, in the pump cylinder by each lead to form a sealed chamber, resulting in suction and discharge between the seal. Screw pump work, due to the two driven screw symmetrical with the active screw, so the role of the active screw on the radial force completely balanced, the active screw does not bear the bending load. The radial force exerted by the follower screw is supported by the pump cylinder bushing along its entire length. Therefore, it is not necessary to provide a separate bearing on the outer end and substantially not to bear the bending load. In operation, a layer of oil film formed between the outer surface of the screw and the inner wall of the pump cylinder can prevent the direct contact between the metal and greatly reduce the wear of the screw tooth surface. Screw pump work, both ends of the role of the liquid suction pressure, so the screw to produce axial thrust. For small pumps with differential pressure less than 10 kgf / cm2, thrust bearings can be used. In addition, high pressure oil is introduced into the bottom of each screw sleeve through the center bore of the active screw to create a balanced thrust at the lower end of the screw that is counter to axial thrust. Screw Pump Like other positive displacement pumps, when the pump outlet is completely closed, the pressure inside the pump rises to the point of damaging the pump or overloading the motor. Therefore, the suction pump outlet, you must set the safety valve. Screw pump structure Screw pump shaft seal, usually mechanical seal, and can work under pressure in different forms. Screw pump is the use of screw rotation to suction and discharge liquid. The middle of the screw for the active screw, driven by the prime mover rotation, the screw on both sides of the driven screw, with the active screw for reverse rotation. The main, driven screw thread are double-headed thread. Due to the mutual engagement of the screws and the tight fit of the screw with the inner wall of the liner, one or more sealed spaces are separated between the suction and discharge of the pump. As the screw is rotated and engaged, these sealed spaces are constantly formed at the suction side of the pump, sealing the liquid in the suction chamber therein and continuously displacing in the axial direction of the screw from the suction chamber to the discharge end to be closed in the respective spaces Continued discharge of liquid, like a nut in the screw rotation is constantly moving forward, as the case, which is the basic working principle of the screw pump. The working principle of the screw pump is that when the screw pump is working, the liquid is sucked into the sealed space enclosed by the screw thread and the pump shell. When the driving screw rotates, the screw pump sealing volume increases the pressure of the screw pump under the extrusion of the screw thread, And move in the axial direction. Since the screw is rotating at a constant speed, the flow of liquid out is also uniform. Screw pump features: screw pump loss, good economic performance. High pressure and uniform, uniform flow, high speed, with the original direct motivation. Screw pump can transport lubricating oil, conveying fuel, conveying a variety of oils and polymers for conveying viscous liquid.
Diesel tools are mainly used to repair diesel injector and pump.
There are Common Rail Tools, HEUI Tools, HEUI tools, EUI EUP tools and Other Diesel Tools.
Various tools including disassembly and assembly, measuring, adaptors for different injectors, grinding machine, cleaning machine etc.
These tools meet different maintenance applications, are easy to use, and greatly improve maintenance efficiency.
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