Nozzle for air-float main shaft

• Main Authors: ZHANG HONGYAN, LIN HU, LEI WENZE, BAI JIUCHENG, JIE WENWU, ZHANG HENG
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2011
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; ATOMISING APPARATUS; BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MEASURING; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; MECHANICAL ENGINEERING; NOZZLES; PERFORMING OPERATIONS; PHYSICS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; SPRAYING APPARATUS; SPRAYING OR ATOMISING IN GENERAL; TARIFF METERING APPARATUS; TESTING; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

Provided is a nozzle for an air-float main shaft. The nozzle is a hollow revolving body. A bore at one end of the nozzle is communicated with an air passage, and a pore at the other end of the nozzle is an air jet bore. A recessed surface is processed in the middle of the end plane of the nozzle with the air jet bore. The recessed surface is 0.02mm in depth, and 3mm to 6mm in diameter. And the recessed surface forms the air chamber of the air-float main shaft. The nozzle is embedded in the inner sleeve of the shaft sleeve of the air-float main shaft, and is communicated with the air passage disposed in the shaft sleeve. After entering the nozzle via an air inlet, gas is sprayed out from the air jet bore under the effect of pressure and diffuses in the air chamber formed by the recessed surface so as to enlarge a contact area between the gas and a matching upper end plate, lower end plate and the main shaft, thereby increasing the generated air-float force and expanding the weight range of a to-be-measured obj