A compact, versatile high-pressure pump

Abstract

The invention relates to a small-sized and multipurpose high-pressure pump. The small-sized and multipurpose high-pressure pump is composed of a power end and a hydraulic end, wherein the power end comprises a crank case, a back cover, a crankshaft, a crankshaft end cover, a plurality of connecting rods and an integrated intermediate rod; the hydraulic end comprises a pump head, a plurality of intake valves and a plurality of drain valves. The small-sized and multipurpose high-pressure pump has the following advantages: because the original crosshead and plunger rod are replaced by the integrated intermediate rod, the coaxiality is good, assembly is convenient, and meanwhile, the size of the product can be reduced; the crank case and the back cover are provided with fins, the crankshaft end cover is provided with heat-dissipating holes, meanwhile, the part of the crank case, which corresponds to the heat-dissipating holes, is provided with slots, moreover, the middle of the bottom of the crank case is sunken upwardly, consequently, the coercive measures can ensure that the heat in the crank case can be dissipated out as soon as possible, so that the lubricating property of the lubricating oil in the crank case cannot be affected, as a result, the parts in the crank case can be prevented from being abraded, and thereby the service life of the entire product can be prolonged. The arrangement of the fins also can play a reinforcing role at the same time.

Description

technical field [0001] The invention belongs to the technical field of hydraulic machinery, in particular to a small-volume, multi-purpose high-pressure pump. Background technique [0002] The high-pressure pump, also known as the plunger pump, is an important device of the hydraulic system. It is mainly composed of a power end and a hydraulic end. The power end is used to transfer the energy of the prime mover to the hydraulic end, and the hydraulic end is used to convert mechanical energy. It is liquid pressure energy, and its working principle is to rely on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working chamber to realize the suction and compression of the medium. It has high rated pressure, compact structure, high efficiency and convenient flow adjustment. Advantages, it is widely used in high pressure, large flow and occasions where flow needs to be adjusted, such as hydraulic presses, engineering machinery, oil fiel...

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Problems solved by technology

[0003] 1. The box on the power end is made of HT250 cast iron or QT600 ductile iron, and the rear cover is made of cast aluminum for heat dissipation. Since there is no heat dissipation on the surface of the box, the temperature inside the box may be as high as 60 degrees or more during use, resulting in The lubricating properties of the lubricating oil are reduced, resulting in increased wear of the components, thus shortening the service life of the product

[0004] 2. Since the volume of the high-pressure pump for this vehicle cannot be too large, there is basically no space for adding a forced cooling system

[0005] 3. Since the liquid discharge valve and the liquid inlet valve are respectively installed in the upper and lower parts of the upper cavity of the pump head, and the liquid discharge valve and the liquid inlet valve are both split plate valve structures, a support spring needs to be set between the two valves during use. If there is a problem with the inlet valve and needs to be replaced, the drain valve and the support spring must be dismantled first, and then the drain valve and the support spring must be installed after maintenance. Due to the large number of parts, the integrity is not good, and disassembly It is very troublesome to install and the work efficiency is low. In addition, due to the unreasonable structural design of the discharge valve and the liquid inlet valve, the resistance of the upper valve sleeve is large and the structure is complicated.

[0006] 4. The crosshead on the power end and the plunger rod on the liquid end are two separately produced parts, and the two are connected to each other by threaded connection. Since it is difficult to ensure the coaxiality during processing, the assembly is inconvenient

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