Improve the structure of the coaxiality of the magnetic guide through the piston and the slideway of the crosshead
A crosshead slide, coaxiality technology, applied in the direction of crossheads, shafts and bearings, liquid variable capacity machines, etc., can solve the problems of high-pressure piston eccentricity and other problems, and achieve the effect of eliminating thermal expansion
Active Publication Date: 2018-03-27
XI AN JIAOTONG UNIV
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Problems solved by technology
The guidance of differential pistons with different diameters can also cause eccentricity of the high-pressure pistons
Method used
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Embodiment Construction
[0027] Now the reciprocating compressor used in the market and industrial field is provided with a step at the bottom of the cylinder, the support plate of the cylinder head is connected with the step, and the bottom of the support plate is connected with the pedestal on the foundation. According to the structural design habits and functional requirements of the compressor, the exhaust valve and the exhaust chamber of the cylinder of the modern compressor are arranged on the lower half of the cylinder body, while the suction chamber is arranged on the upper half of the cylinder. As a result, the temperature of the lower half of the cylinder exceeds 100°C under the high temperature of the exhaust gas, and the high temperature of the cylinder is directly transmitted to the support plate of the cylinder, which causes increased thermal expansion of the cylinder block and the support, and lifts the cylinder head. High, it has just caused the center line of the cylinder and its pisto...
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The invention discloses a structure for improving the coaxiality of a magnetic guiding penetrating piston and a cross head slipway. The structure comprises an air cylinder body and an air cylinder support for supporting the air cylinder body. The air cylinder body is of the structure that the upper portion is used for air inlet and the lower portion is used for air exhaust. A water cooling channel is formed in the position, connected with an air cylinder head of the air cylinder body, of the air cylinder support. The piston is arranged in the air cylinder body. A plastic supporting ring is arranged on the lower portion of the piston. The structure further comprises a cross head, the slipway and a suspension guide rail. The slipway comprises a circular-arc-shaped slipway body in the middle and flat-plate-shaped sliding plates located on the two sides of the circular-arc-shaped slipway body. The upper portion of the cross head is in sliding fit with the circular-arc-shaped slipway body of the slipway. The suspension guide rail is fixedly connected with the cross head through a bolt and is in sliding fit with the sliding plates at the two shoulders of the slipway. According to the structure for improving the coaxiality of the magnetic guiding penetrating piston and the cross head slipway, the water cooling channel is formed in the position, connected with the air cylinder head of the air cylinder body, of the air cylinder support, the plastic supporting ring is arranged on the lower portion of the piston, and the sliding fit structure of the cross head and the slipway is changed, so that the coaxiality of a magnetic guiding penetrating piston rod, the piston and the cross head slipway is effectively improved.
Description
technical field [0001] The invention relates to the technical field of high-pressure reciprocating compressors, in particular to a structure for improving the coaxiality between a magnetic guide penetrating piston and a crosshead slideway. Background technique [0002] With the massive development of oil and natural gas, the application of high-pressure reciprocating compressors in the petrochemical field has become more and more common, and petrochemical engineering has higher and higher requirements for the reliability of reciprocating compressors. Piston rings and packing are the two main wearing parts in reciprocating compressors. However, the centerline of the piston rod and the centerline of the crosshead slideway are not aligned concentrically during installation and operation, causing the piston rod to oscillate radially during reciprocating motion, and the packing ring sealing the piston rod wears rapidly and fails [1]. In addition, in the labyrinth compressor with...
Claims
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IPC IPC(8): F04B39/12F04B39/00F04B39/06F16C5/00
CPCF04B39/0005F04B39/0022F04B39/06F04B39/122F04B39/125F16C5/00
Inventor 赵忖张文珊余小玲冯全科
Owner XI AN JIAOTONG UNIV