Split type gear pump floating shaft sleeve combination piece and machining method thereof

Abstract

The invention discloses a split type gear pump floating shaft sleeve combination piece and a machining method thereof. The split type gear pump floating shaft sleeve combination piece is good in machining process, and the product quality is easily guaranteed. The split type gear pump floating shaft sleeve combination piece comprises cylindrical shaft sleeves with circular flanges, a plane parallel to a shaft hole is manufactured on each flange, and floating shaft sleeves are manufactured; a sliding bearing made of composite materials is installed in the shaft hole of each floating shaft sleeve, a steel sleeve is arranged outside each sliding bearing, and copper alloyed powder layers are sintered on the inner walls of the steel sleeves; and Teflon layers are attached to the copper alloyed powder layers, and the planes of the two floating shaft sleeves are oppositely combined to form a floating shaft sleeve combination piece shaped like an Arabic numeral eight. According to the whole floating shaft sleeve combination piece shaped like the Arabic numeral eight, the two split floating shaft sleeves are combined, and therefore the machining accuracy and the production efficiency of the floating shaft sleeve are greatly improved.

Description

technical field [0001] The invention relates to parts of a gear pump, in particular to a split-type floating shaft sleeve assembly applied to a high-pressure gear pump and a processing method thereof. Background technique [0002] The gear pump is a commonly used part in the hydraulic system. It is a rotary pump that relies on the change and movement of the working volume formed between the pump body and the meshing gear to transport or pressurize the liquid. It consists of two meshing gears and an 8-shaped floating sleeve that is close to the two ends of the gears. figure 1 Shown consists of two enclosed spaces. The shafts on the two gears are inserted in the 8-shaped floating shaft sleeve holes. When the gear rotates, the volume of the space on the gear disengagement side becomes smaller and larger, forming a vacuum, which sucks the liquid, and the space volume on the gear meshing side changes from large to small, and squeezes the liquid into the pipeline to form a high-...

AI Technical Summary

Problems solved by technology

At present, the commonly used floating bushings are all processed in one piece, that is, the 8-shaped floating bushing is processed as a whole, and the 8-shaped upper and lower gear shaft holes and the two ends of the shaft hole are processed. When processing two gear shaft holes, secondary clamping is required. This figure-8 shape part is an irregular shape, and general-purpose fixtures cannot be used, and the figure-8 shape of the provided clamping parts is a non-machined surface. Secondary clamping It is difficult to guarantee the accuracy of the dimensional tolerance and position tolerance of the clamped parts. As a key part of the gear pump, its accuracy is very high, usually at level 5-6. Therefore, the reject rate of the traditional processing method is high, and the quality of the product has always been difficult to control.

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