Novel self-lubricating and supporting type variable-volume two-screw pump

Abstract

The invention provides a novel self-lubricating and supporting type variable-volume two-screw pump and belongs to the technical field of screw pumps. A media input end is arranged on a left pump shell. A media output end is arranged on a right pump shell. A self-lubricating bearing device is arranged inside the junction of the left pump shell and the right pump shell. A variable-pitch driving screw and a variable-pitch driven screw are arranged in a pump body in a penetrating mode. A rear supporting cover is arranged at the end of the left pump shell in a connected mode. A driving gear and a driven gear engaged with the driving gear are arranged in the rear supporting cover. A rear end cover is arranged on the end face of the rear supporting cover. A front supporting cover is arranged at the end of the right pump shell in a connected mode. A front end cover is arranged on the end face of the front supporting cover. The head of the driving screw stretches out of the front end cover to serve as the power input end of the two-screw pump. The volume is changed by changing the fixed pitches of the screws so that deformation of the middle portions of the screws when the two-screw pump operates can be reduced, vibration and noise generated during gas-liquid medium delivery are reduced, and the transmission stability of the two-screw pump is improved; and the bearing capacity of the gears is improved, and accordingly, the working efficiency of the two-screw pump is improved.

Description

technical field [0001] The invention belongs to the technical field of screw pumps, and relates to a novel twin-screw pump with self-lubricating support and variable volume, in particular to a novel twin-screw pump with bearing support, arc gear pump transmission and variable volume. Background technique [0002] The twin-screw pump is a volumetric quantitative pump. The screws in the pump mesh with each other, and the screw and the hole wall and pump body that accommodate the screw form a sealed cavity that is connected to each other. The ends of the two screw rods are connected by synchronous gear transmission, and the synchronous gear is set in the gear box with independent lubrication and separated from the pump chamber. The synchronous gear ensures the relatively continuous stationary rotation of the screw, so that the sealing chamber can move forward continuously and smoothly in the axial direction without agitation, so as to achieve the purpose of pumping. The outsta...

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Problems solved by technology

Although the manufacturing and assembly process of the spur gear transmission is relatively simple, it is prone to shock, vibration and noise when the gears are meshing and withdrawing, and its bearing capacity is also poor; the helical gear transmission has a large coincidence coefficient, stable transmission, high gear strength, and is suitable Suitable for heavy load transmission and low noise, but helical gears will generate axial force, and the assembly process is more complicated than that of spur gears

[0006] 3. During the working process of the twin-screw pump, the screw will be affected by the pressure of the fluid, and the screw will be deformed, especially in the middle of the screw.

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