Diaphragm pump power end crankshaft
Diaphragm pump is the key equipment for long-distance pipeline transportation of high corrosion, high concentration, high pressure, high temperature and solid/liquid two-phase medium in the world. It is an important supporting equipment for metallurgy, building materials and other industries. The overall structure is driven by transmission system and power. End, hydraulic end, hydraulic auxiliary system, electrical control system and other components. The power end is an important part of the diaphragm pump, which is mainly composed of a power end box, an eccentric crankshaft, a connecting rod, a bearing, a crosshead, a guide plate and a rod, and forms a small crankshaft.
The power end structure is shown in Figure 1. The working principle is as follows: the motor of the transmission system drives the pinion, the large gear, the crank assembly, the connecting rod and the crosshead through the transmission system, so that the rotary motion is converted into a linear motion, and the piston is driven to reciprocate; the function of the crankshaft is to drive the power The rotary motion provided by the transmission system is converted into a linear reciprocating motion, and the torque transmitted by the motor is converted into the piston force supplied to the hydraulic end. Therefore, the crankshaft is one of the most important components of the power end, bearing the maximum load and full power, with a strong direction of changing bending moments and torque, while experiencing long-time high-speed wear, crankshaft components The quality of the part is directly affected by the quality of the crankshaft assembly, which directly affects the service life of the equipment. Therefore, designing the tooling fixture that meets the assembly quality is the premise guarantee for the crankshaft assembly.
2. Design improvement of the crankshaft pumping tool
In the production of a company, the production of any product must first develop a complete set of process plans, and each process in the process plan must be completed to ensure the processing needs and quality of the product. Tooling design is the prerequisite for product realization. Tooling fixture is the mechanical processing equipment. It is the general term for the tools, measuring tools, fixtures, molds and auxiliary tools used in the production of the products. It is an important part of the production technology preparation. Whether the structural design of the tooling fixture is scientific and reasonable, economically feasible, and directly affects The quality of the product, the processing cost, the production efficiency and the normal production of the enterprise, so the tooling design is very important. Figure 2 shows the new structure of the three-crank crankshaft assembly tooling design.
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