Three screw pump

Brief introduction

Three screw pump is an important kind of non abrasive oil-based fluid transmission equipment with certain lubricity. Because of its stable flow, small pressure fluctuation, high cost performance, and no shear transmission of medium with low viscosity, it is widely used in various industrial processes, also known as the positive displacement three screw pump, three blade rotor pump and three-axis transmission pump.

Xinglong three-screw pump is a positive displacement pump, which transmits liquid through a cavity with a certain geometry formed by sealing between the meshing pairs (main and subordinate rods and bushes). The main components of the pump include three rotating screws and a three hole bush wrapped around its outer circle contour. The driving screw is driven by the driving machine to rotate. The two driven screws are driven by the liquid film between the main rod and the driving screw to rotate passively. The driving screw and the driven screw are both working in the closely matched Bush hole. Therefore, between the pump inlet and the outlet, the screw and the bush are separated by a certain number of bolts and bushes What is the shape of the conveying cavity. These closed cavities form a step-by-step boost pumping process from the pump inlet to the outlet as the screw rotates.

SMT series three screw pump is suitable for industrial low and medium pressure (up to 80 bar). It is a reliable and noiseless solution, which is suitable for applications requiring long service life and very stable fluid flow. SMT pump is a kind of three screw pump with integral body and liner design, which has high cost performance.

It is designed with a flange connection structure which can be installed flexibly, and the fluid can flow into the pump axially / radially. In addition, the radial direction of the inlet or outlet can be adjusted in the direction of 90 degrees. The pump body and the bush are integrated, which reduces the machining difficulty and improves the assembly accuracy.

SMT series three screw pump has internal bearing structure, and the bearing is lubricated by the pump fluid during the working process. According to the temperature of the pumped fluid, there are several shaft seal schemes: single end face mechanical seal scheme and framework oil seal scheme.

The length of the fitting section of the screw and the Bush is close to 2 to 3 times of the screw lead, so the theoretical limit pressure difference can reach 40 bar - 80 bar.

SMT series three screw pump has many specifications: smt20, smt25, smt32, smt40, smt45, smt55, smt60, smt70, smt80, smt90. The Arabic numerals above represent the maximum diameter of the main rod spiral section.

Three screw pumps of the same model can change the different requirements of conveying flow by changing the screw angle, such as 36, 38, 40, 42, 44, 46, 50, 52, 54 degrees.

Advantages

More economical - very low life cycle cost

Reliability - high hardness nitriding steel for screw

Non pulsating delivery - the medium is stable and non pulsating during pumping

Easy to maintain - when replacing major parts (including screws and bushings), the pipeline does not need to be removed

Flexibility - low inlet pressure and wide allowable speed range

Low noise - working principle virtually eliminates pressure fluctuations

Self absorption - normally no forced feeding device or equipment is required

For you to solve transport requirements include

Full series standardization, maximum flow up to 1200L / min

Output pressure up to 40 bar

The viscosity range of the material is usually 1 to 150 CST

Pumping temperature up to 80 ℃

The direction of import and export can be adjusted according to the actual transportation requirements of customers

Strict quality standards and test procedures ensure that you get the best performance three screw pump. We continue to provide after-sales technical support (4008055600) to ensure the best performance under various service conditions.