Inverted-V-shaped arc gear metering pump

Abstract

The invention discloses an inverted V-shaped arc gear metering pump, and belongs to the technical field of gear metering pumps. The inverted V-shaped arc gear metering pump comprises a gear case, two splined shafts, a plurality of transmission bevel gears and a plurality of inverted V-shaped arc gear sets; the driving spiral gears are arranged on the end portions of the two splined shafts, and the two splined shafts are arranged in the gear case side by side and enable the two driving spiral gears on the end portions of the two splined shafts to be engaged with each other; the multiple inverted V-shaped arc gear sets are arranged on the two splined shafts and located between the transmission bevel gears at two ends of the splined shafts; and a baffle is arranged between every two adjacent inverted-V-shaped arc gear sets to enable an independent cavity body to be formed between each inverted-V-shaped arc gear set and the gear case. The metering pump has less gear teeth, and high flow quantity, is stable to rotate, cannot result in the phenomena of flow fluctuation and material being trapped, can achieve quantitative material extrusion, and is very low in weight deviation.

Description

technical field [0001] The invention relates to the technical field of gear pumps, in particular to a herringbone arc gear quantitative pump. Background technique [0002] Gear pumps are simple in structure, easy to manufacture, and low in cost, so they are widely used. The current involute gear pump is prone to the following problems: such as figure 1 As shown, when the contact ratio is greater than 1, there will be two-point contact, and the involute gear will change in the partial closed space of the two meshing gears, as shown in Figures a, b, c, and d. The meshing closed space will change, so When its engagement shrinks, a higher pressure is generated on the discharge side, and the negative pressure around the suction side will increase, resulting in vibration, noise, air bubbles, shaft power increase, pressure flow pulsation, etc.; and due to the involute gear The characteristics of the meshing, there is a gap in the meshing, so the meshing of the involute gears will...

AI Technical Summary

Problems solved by technology

The current involute gear pump is prone to the following problems: such as figure 1 As shown, when the contact ratio is greater than 1, there will be two-point contact, and the involute gear will change in the partial closed space of the two meshing gears, as shown in Figures a, b, c, and d. The meshing closed space will change, so When its engagement shrinks, a higher pressure is generated on the discharge side, and the negative pressure around the suction side will increase, resulting in vibration, noise, air bubbles, shaft power increase, pressure flow pulsation, etc.; and due to the involute gear The characteristics of the meshing, there is a gap in the meshing, so the meshing of the involute gears will cause trapped materials, figure 1 The small dots between the middle gear gaps will produce trapped materials

Due to the pressure pulsation and flow pulsation at low speed, it is impossible to carry out precise conveying control on the material, and the energy consumption is large, the noise is large, the input shaft power increases, and the service life is short

Due to the large number of teeth, under the limitation of specific structure, the gap space is small, and it is impossible to accurately and quantitatively transport the large particle materials in the fluid.

Images