Novel liquid nitrogen cold assembly device

A new type of liquid nitrogen technology, applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve problems affecting the quality of cold installation, corrosion of shaft parts or frosting, etc., to ensure cooling effect, avoid surface corrosion, strengthen The effect of heat dissipation

Inactive Publication Date: 2011-03-16
WUXI JULI HEAVY IND OFF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that because the shaft needs to be placed in liquid nitrogen, liquid nitrogen will corrode or frost the shaft, which will affect the quality of cold installation

Method used

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  • Novel liquid nitrogen cold assembly device
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Embodiment Construction

[0008] See figure 1 , The structure of the present invention includes a liquid nitrogen tank 8, a thermal insulation cooling box 5, an evaporator is installed in the thermal insulation cooling box 5, and the liquid nitrogen tank 8 is connected to the evaporator through a pipeline. The evaporator includes stainless steel tubes 4 and cooling fins 9; the stainless steel tubes 4 are arranged and installed vertically in a spiral shape along the heat insulation cooling box 5; the liquid nitrogen tank 8 is connected to the lower port of the stainless steel tube 4 through the pipeline and the throttle valve 6; the stainless steel tube 4 The upper port is connected with an exhaust pipe 7, and the exhaust pipe 7 passes through the side wall of the thermal insulation box 5; the heat sink 9 is installed outside the stainless steel pipe 4; the fan 2 is installed on the top of the thermal insulation cooling box 5; the thermal insulation cooling box A desiccant 10 is also placed in the 5; th...

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Abstract

The invention provides a novel liquid nitrogen cold assembly device, relating to the technical field of installation equipment for interference fit parts. In the invention, on the premise of ensuring the accurate installation of shafts, superficial corrosion effect of liquid nitrogen on the shafts is effectively reduced so as to avoid frosting, thereby ensuring the cold assembly quality of the interference fit parts. The liquid nitrogen cold assembly device provided by the invention comprises a nitrogen tank and a heat insulation cooling tank, and is characterized in that an evaporator is arranged in the heat insulation cooling tank; and the nitrogen tank is connected with the evaporator through a pipeline.

Description

technical field [0001] The invention relates to the technical field of interference fit component installation equipment, in particular to a novel liquid nitrogen cold installation device. Background technique [0002] Generally, the installation of interference fit parts adopts the shrink fit technology, which heats the containing part to make the hole expand to form a clearance fit, and puts the contained part (shaft part) into the containing part hole to achieve the purpose of shrink fitting. At present, the installation of high-required interference fit parts adopts cold assembly technology, which places the shaft in liquid nitrogen, the liquid nitrogen is vaporized, and the size of the shaft is reduced by cooling to form a clearance fit, and the shaft can be installed into the container. in the hole. The disadvantage is that the shaft needs to be placed in liquid nitrogen, and the liquid nitrogen will corrode or frost the shaft, thus affecting the quality of cold insta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P11/02
Inventor 邹恩群王凤良
Owner WUXI JULI HEAVY IND OFF
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