Hydraulic linkage type plunger pushing mechanism and plunger diaphragm pump using same

Abstract

The invention discloses a hydraulic linkage type plunger pushing mechanism and a plunger diaphragm pump using the same, the mechanism is provided with a crankshaft which is installed in a low-pressure liquid cavity of a plunger diaphragm pump body through a bearing assembly, the crankshaft is provided with an eccentric part, and the eccentric part of the crankshaft is sleeved with a bearing. According to the plunger diaphragm pump, the hydraulic linkage type plunger pushing mechanism is arranged, so that the problem that mechanical abrasion of a swash plate pushing head driving type hydraulic unit in a traditional plunger diaphragm pump is large is solved through the crankshaft, bearing and eccentric design, the bearing is arranged at the eccentric position of the crankshaft, and the outer ring of the bearing and the pushing head are tightly attached and do not generate relative movement; relative movement is achieved through the rolling bearings, the crankshaft pushes the corresponding plungers through the rolling bearings to complete compression action, outer rings of the bearings are not directly abraded with the plungers, factors of oil temperature rise caused by large mechanical action range of a traditional swash plate pushing head and large mechanical abrasion caused by sliding friction are avoided, the oil temperature in a low-pressure liquid cavity is greatly reduced, and the service life of the crankshaft is prolonged. And the oil temperature of the low-pressure liquid chamber is not obviously increased in the actual operation process.

Description

technical field [0001] The invention relates to the technical field of pumps, in particular to a hydraulic linkage type plunger pushing mechanism and a plunger diaphragm pump using the same. Background technique [0002] At present, the plunger pumps on the market are mainly the crankshaft connecting rod structure and the swash plate push-pull structure. Because there is a certain gap between the connecting rod and the crankshaft, the operation is unstable and the efficiency is low; and the crankshaft connecting rod structure often occupies more space, making the product bulky and heavy. Due to the structural design defects of the traditional crankshaft and connecting rods, it is easy to increase the mechanical wear and damage the crankshaft connecting rod structure, and at the same time, it is easy to increase the oil temperature inside the hydraulic drive mechanism, which will further lead to the hydraulic oil of the hydraulic drive mechanism. Emulsification And the loss ...

AI Technical Summary

Problems solved by technology

Because there is a certain gap between the connecting rod and the crankshaft, the operation is not stable and the efficiency is low; and the crankshaft connecting rod structure often takes up more space, making the product bulky and heavy

Due to the structural design flaws of the traditional crankshaft and connecting rod, it is easy to cause increased mechanical wear and damage the structure of the crankshaft and connecting rod. At the same time, it is easy to increase the internal oil temperature of the hydraulic drive mechanism, which will further lead to emulsification of the hydraulic oil of the hydraulic drive mechanism. and loss of lubricating properties

The push-pull structure of the swash plate has a large range of motion, and the sliding friction between the swash plate and the plunger is large, which is prone to wear and tear of parts, excessive power loss, and problems such as oil temperature rise.

[0003] More importantly, in the case of overpressure of the oil pressure, it is easy to bring the risk of damage to the plunger diaphragm pump, such as plunger spring breakage, diaphragm damage, etc.

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