Vertical non-oil-contamination energy-saving vacuum pump

Abstract

The invention discloses a vertical non-oil-contamination energy-saving vacuum pump which comprises a pump body (27) and a cylinder (7), wherein the pump body (27) is internally and respectively provided with a cross head (28) and a connecting rod (30); the top of the cross head (28) is provided with an oil collecting storage tank (281) which is communicated with a gap between the cross head (28) and a piston rod (14) by a small lubrication flow channel hole (282); the outer side wall of the cross head (28) is also provided with at least two horizontal oil grooves (284); the oil collecting storage tank (281) is communicated with the horizontal oil grooves (284) by big lubrication flow channel holes (283); the center of the bottom of the cross head (28) is provided with a central drop hole (285); and the top of a connecting rod (30) is provided with a lubricating hole (301) of an upper end hole of the connecting rod, and the lubricating hole is positioned under the central drop hole (285). The vertical non-oil-contamination energy-saving vacuum pump has the characteristics of being reliable in lubrication, stable in running and convenient and fast in filtering.

Description

technical field [0001] The invention relates to a general mechanical product—a vertical vacuum pump driven by a crank connecting rod cross head, in particular to a vertical oil-free energy-saving vacuum pump. Background technique [0002] Among the known vacuum pumps, especially the vacuum pumps with large displacement, the piston type vacuum pump driven by the crank connecting rod is widely used. It is generally used in high gas pollution fields such as chemical industry and medicine. Due to the low pressure and large displacement, the piston of the moving part is particularly large and heavy. The advantage of the vertical structure is replaced, but the vacuum pump of the vertical structure still has the following problems for a long time: [0003] 1) The force between the crosshead and the slideway of the pump body is the largest, and the wear is also the most severe. It must be equipped with a complex lubrication system for effective lubrication, which is prone to additi...

AI Technical Summary

Problems solved by technology

[0003] 1) The force between the crosshead and the slideway of the pump body is the largest, and the wear is also the most severe. It must be equipped with a complex lubrication system for effective lubrication, which is prone to additional failures

If it only relies on its own splash lubrication, it will be difficult to satisfy the strong friction of the crosshead slideway, which will cause the crosshead slideway to burn out and get stuck in a very short time

Moreover, if only relying on its own splash lubrication, it is impossible to guarantee the effective lubrication of the high-position relative friction surfaces such as the crosshead pin and the upper end hole of the connecting rod

[0004] 2) The seal between the piston rod and the cylinder neck, the single-stage integrated seal is unreliable, and it is inevitable that high-pollution exhaust gas will leak into the lubricating oil in the pump body from top to bottom through the piston rod, which will cause serious damage in a short time. Serious consequences of machine destruction caused by lubricating oil deterioration and failure

[0005] The two-stage seal of the split structure, although the sealing effect is good, takes up a lot of space, not only the manufacturing cost is high, but also the appearance is ugly, and the overall installation is not stable enough due to the large parts such as the cylinder, which affects the service life of the vacuum pump.

[0006] 3) In addition, the intake pipeline is not filtered or the filter is unreasonable, and the corrosive gas with impurities makes the selection of working parts such as pistons and valves in a dilemma: metals are afraid of corrosion, and non-metals are easy to be worn by impurities

In addition, the condensed residual liquid in the vacuum process will also cause great hidden dangers of the condensed liquid to the piston and cylinder in the vacuum process; the residues in various high-pollution gases will directly cause the difficulty of opening and closing the air valve, and the piston is easy to be blocked , not only directly lead to an increase in exhaust pressure, a large increase in power consumption, frequent failures, but also bring maintenance troubles and affect the continuity of the production process and many other problems

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