A connection adjustment structure between a piston rod and a crosshead body

Abstract

The invention provides a connection adjustment structure between a piston rod and a crosshead body, which has the advantages of convenient installation, good manufacturability, safety and beauty, etc. After the radial clearance adjustment of the piston rod is completed, all other adjustment parts can be removed without safety Hidden dangers, the parts have good manufacturability, and can also ensure multiple adjustments. It includes a crosshead body, a hydraulic nut, a piston rod, a gasket, and a flange. The hydraulic nut is arranged in the inner hole of the front end of the crosshead body, and the positioning surface of the flange is fastened to the crosshead by bolts. On the axially outer end surface of the crosshead body, the piston rod is positioned on the hydraulic nut after passing through the central hole of the flange, and the axially outer end surface of the crosshead body and the positioning surface of the flange The gasket is characterized in that: an adjustable gasket is inserted between the inner end surface of the gasket and the axial outer end surface of the crosshead body, and the adjustable gasket is a flange-shaped adjustable gasket , the adjustable gasket is fitted on the inner protruding shaft of the flange.

Description

technical field [0001] The invention relates to the technical field of connection structure of a piston rod, in particular to a connection adjustment structure of a piston rod and a crosshead body. Background technique [0002] Process reciprocating piston compressors are widely used in various industries. The crosshead is an important part connecting the connecting rod for rocking motion and the piston rod for reciprocating motion, and it has a guiding function. There are many ways to connect the crosshead body with the piston rod. In general, for models with a piston force below 32T, the crosshead body screw hole is used to fasten the thread and flange on the piston rod. See Figure 1 ~ Figure 3 As shown, the piston rod 6' is clamped by the hydraulic nut 2' to the flange 4', and is fastened to the axial outer end surface of the crosshead body 1' with six bolts 5' by means of hydraulic tightening. Changing the thickness of the washer 3' can adjust the axial clearance of ...

AI Technical Summary

Problems solved by technology

Although this structure has fewer components, the adjusting gasket 7' includes an adjusting part, a fastening part, and a threaded hole part, which makes the processing technology of the adjusting gasket poor, and it is difficult to meet the design requirements. At the same time, the adjusting gasket 7' and the four support bolts 8' must remain in the connection structure between the piston rod 6' and the crosshead body 1' after the adjustment is completed. At this time, the support bolts must be locked, which makes the adjustment of the gasket 7' There is no movable margin in the radial adjustment part, which increases safety hazards and affects the aesthetics of assembly

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