Common problems and solutions in the use of the ho

Common problems and treatment methods in the use of G-type single screw pump

G-type single screw pump is a rotor type positive displacement pump, which relies on the mutual meshing of screw and bushing to produce volume changes in the suction chamber and discharge chamber to transport liquid. G-type single screw pump is a closed screw pump with internal engagement. The main working parts are composed of a bushing (stator) with double helical cavity and a single head helical screw (rotor) engaged with it in the stator cavity. When using G-type single screw pump, we often encounter the following problems:

1 The pump body vibrates violently or produces noise

causes: the water pump is not installed firmly or the water pump is installed too high; The motor ball can also be damaged by 1-color wire bearing; The water pump spindle is bent or not concentric or parallel with the motor spindle

treatment method: install the water pump stably or reduce the installation height of the water pump; Replace the motor ball bearing; Correct the bent water pump spindle or adjust the relative position of the water pump and motor

2. Transmission shaft or motor bearing overheating

causes: lack of lubricating oil or bearing rupture, etc

treatment method: add lubricating oil or replace the bearing

3. The water pump does not discharge water

1. The sample is a section of V-belt with full section

cause: the pump body and suction pipe are not filled with water; The dynamic water level is lower than the water pump filter pipe; Broken suction pipe, etc

the sealing surface between the screw and the shell is a spatial curved surface. There are unsealed areas such as AB or de on this surface, and many triangular notches ABC and def are formed with the groove of the screw. These triangular notches form a channel for liquid, connecting the driving screw groove a with the grooves B and C on the driven screw. The grooves B and C are wound to the back along their own spiral, and are respectively connected with the grooves D and E on the back. Because there is also a triangular notch a 'similar to the front on the sealing surface where slots D and e connect with slot f (which belongs to the other spiral), that is, the mean time between failure is similar to that of foreign products, so it can be used as a material that many metal and non-metal materials are not competent for, so D, F and e will also be connected. In this way, the groove abcdea also forms a "∞" shaped sealing space (if a single head thread is used, the groove will disc the screw along the axial direction and connect the suction and discharge ports, which cannot form a seal). It is not difficult to imagine that many independent "∞" shaped sealing spaces will be formed on such a screw, and the axial length occupied by each sealing space is exactly equal to the lead t of the accumulated rod. Therefore, in order to separate the oil suction and discharge ports of the screw, the length of the screw thread section should be at least greater than one lead