Gear metering pump

Abstract

The invention discloses a gear metering pump. A pump body is provided with a gear cavity, a first lubricating groove and a second lubricating groove. A first driving bearing, a second driving bearing, a first driven bearing and a second driven bearing are fixed on the two side walls of the gear cavity, the non-driving end of a driving shaft is fixed in the first driving bearing and the second driving bearing, and both the first driving bearing and the non-driving end of the driving shaft are positioned at the opening part of the first lubricating groove. One end of a driven shaft is fixed on the first driven bearing, and both the first driven bearing and one end of the driven shaft are positioned at the opening part of the second lubricating groove. Both a driven gear and a driving gear are positioned in the gear cavity, and the driven gear is meshed with the driving gear. Through the mode, part of a fluid medium entering clearances between the driving shaft and the driving bearings and clearances between the driven shaft and the driven bearings can be collected through the lubricating grooves, so that the phenomenon that the fluid medium returns the gear cavity, affects the purity of other fluids and affects the properties of the fluids is avoided.

Description

technical field [0001] The invention relates to the technical field of metering equipment, in particular to a gear metering pump. Background technique [0002] As precision metering equipment, gear metering pumps are widely used in petrochemical, plastic industry, pharmaceutical products and food and beverage industries. Task. [0003] At present, most gear metering pumps are composed of a pair of gears that mesh with each other, one of which is a driving gear, and the other is a driven gear, which is driven by the driving gear to rotate, and there is a small gap between the gear and the pump casing. Clearance. Because the machining accuracy of the gear metering pump is very high, whether it is the tooth surface accuracy of the gear, or the gear and the housing, the matching accuracy of the gear and the tooth top is required to be very high, so the rotational displacement of the gear metering pump is certain, in other words , the volume of the discharged fluid medium is c...

AI Technical Summary

Problems solved by technology

However, under the action of gear power, due to the high temperature and extrusion force caused by friction, this part of the fluid medium will undergo partial fusion and form extremely small non-transparent particles, resulting in a decrease in the transparency of this part of the medium.

In the normal working mode, this part of the fluid medium will re-enter the fluid channel of the original fluid medium, affecting the purity of the original fluid medium

In the production process of optical products, the purity of optical raw materials is very high. In this mode of operation, the lubricant will re-enter the production raw materials, and then be transported to the combination mold by the metering pump, and the product will be directly made, which will affect the optical properties of the product. characteristics, so that the quality is reduced, and in serious cases, waste products will be produced, causing heavy losses

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