Horizontal water colled double-sucking double screw pump

Abstract

The present invention is one horizontal water cooled double-sucking double screw pump superior to available horizontal double-sucking double screw pump, which has overlarge size and hard pipeline layout. Structurally, the horizontal water cooled double-sucking double screw pump has screw cover with ratio between the excircle diameter and pitch diameter of 1.3, pump body with side inlet and side outlet, and gear box and front bearing seat with water cooling water jacket each. The screw pump has high sucking performance, small size, stable running, high work temperature up to 270 deg.c and other advantages, and is favorable to conveying high viscosity medium.

Description

technical field [0001] The invention relates to a horizontal double-suction twin-screw pump. Background technique [0002] At present, there are generally two types of inlet and outlet forms of horizontal double-suction twin-screw pumps, one is side inlet and upper outlet, and the two screws are arranged horizontally (horizontal structure), the other is side inlet and side outlet, and the two screws It is a vertical arrangement (vertical structure), and the two forms have their own characteristics. The first type, the inlet and outlet are side entry and top exit, the safety valve has a large volume, and its external space is large, which is not conducive to pipeline arrangement, but because the two screws are arranged horizontally, the center of gravity of the pump is low, so its operation is stable and the vibration is small , Low noise. In addition, the two screw rods are arranged horizontally, the rolling bearings on the two shafts have better lubrication conditions, an...

AI Technical Summary

Problems solved by technology

The second type, the inlet and outlet are side-in and side-out, and the side-in and side-out form is widely used. Its space is small and the pipeline layout is simple, but in this form, the two screws are generally arranged vertically (vertical structure), its disadvantage is that the center of gravity of the pump is high, and the operation stability is relatively poor, especially for large-scale pumps, so large-scale pumps with this structure should not be used. In addition, the bearing lubrication conditions of the upper screw are poor, and it depends entirely on the splash of the gear , the lubrication in some areas of the bearing is insufficient, and the bearing is easy to wear

[0003] Horizontal double-suction twin-screw pumps generally have three basic structures, namely: short-axis structure (N), middle-axis structure (M), and long-axis structure (L). When the temperature of the conveying medium is high, the long-axis structure is generally used. The long-axis structure has poor rigidity, is easy to deform, and its heat dissipation effect is not very good

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