PUMP BODY ASSEMBLY, FLUID MACHINERY, AND HEAT EXCHANGE DEVICE
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United States of America Patent
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Issued Date -
May 27, 2021
app pub date -
Dec 13, 2018
filing date -
Jul 18, 2018
priority date (Note) -
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Abstract
A pump body assembly, fluid machinery, and a heat exchange device. The pump body assembly includes: at least two structure members; a cylinder (20) disposed between the two structure members; and a piston assembly disposed in the cylinder (20). The piston assembly includes a piston sleeve (40) and a piston (50) slidably disposed in the piston sleeve (40); an upper end surface of the piston sleeve (40) fits and is limited by a lower end surface of one structure member disposed above the piston sleeve (40), so as to prevent the piston sleeve (40) from displacing along a radial direction relative to the one structure member, thereby effectively solving a problem in prior art that working efficiency of the pump body assembly is affected because the piston sleeve (40) of the pump body assembly is prone to eccentrically rotate.
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