Ball crusher with double-rotor hydrostatic bearing structure

Abstract

The invention discloses a ball crusher with a double-rotor hydrostatic bearing structure, which comprises a frame and a lower grinding disc. The lower grinding disc comprises an inner disc, an inner disc spindle, an outer disc, an outer disc spindle and an outer disc spindle bearing block fixed on the frame. The inner disc spindle is fixedly connected with the inner disc. The outer disc spindle is fixedly connected with the outer disc. The inner disc is sleeved in the outer disc. The inner disc spindle is sleeved in the outer disc spindle. The outer disc spindle is sleeved in the outer disc spindle bearing block. An inner disc liquid hydrostatic bearing is arranged between the inner disc spindle and the outer disc spindle. An outer disc liquid hydrostatic bearing is arranged between the outer disc spindle and the outer disc spindle bearing block. The ball crusher with the double-rotor hydrostatic bearing structure has the advantages of high rotary precision and simple and compact structure, is very suitable for precise and ultraprecise grinding machining and is convenient to disassemble and assemble.

Description

technical field [0001] The invention relates to a ball grinding machine, in particular to a ball grinding machine with a double-rotor hydrostatic bearing structure. Background technique [0002] High-precision balls are important components in roundness meters, gyroscopes, bearings and precision measurement. They are in huge demand and are widely used in precision machinery, aerospace, military defense, petrochemical and other fields. They are very important in precision equipment and precision machining. status. The double-rotation grinding disc high-precision ball grinder adopts the original double-rotation ball-forming motion at home and abroad to realize uniform grinding and polishing of the surface of high-precision ball blanks. It has high processing accuracy, processing efficiency and processing consistency, and has a simple structure. The precision requirements of processing and assembly are low. The spindle of the precision ball grinder is the core functional comp...

AI Technical Summary

Problems solved by technology

Rolling bearings have the advantages of high speed, simple structure, mass production, and can be replaced as a whole during maintenance, but there are two inherent deficiencies: one is that because rolling bearings work continuously in contact for a long time, friction, wear and fatigue are inevitable Wear and tear, short service life, after the bearing is worn out, the main shaft must be disassembled for maintenance or replacement of the bearing, and the maintenance and assembly process of the main shaft is complicated, requiring high levels of maintenance personnel, and it takes a lot of time and cost to repair or replace the bearing. It has a negative impact on the production efficiency of the machine tool; secondly, because the rolling bearing relies on the rigid contact of a limited number of rolling elements to provide bearing capacity, the stress in the place where the inner and outer raceways of the bearing are in contact with the ball is very high, while the stress in the place where the ball is not in contact is relatively high. Small, there must be uneven deformation in the circumferential direction, so the high-precision ball double-rotating grinding disc precision ball grinding machine spindle using rolling bearings as a support is not suitable for ultra-thin grinding machines that require higher processing accuracy, processing efficiency, and processing consistency. Precision Machining

However, due to the unique double-rotating grinding disc structure of the grinding machine, there are the following problems when using hydrostatic bearings as supports: 1. The layout of the hydrostatic bearing is difficult; 2. It is difficult to form an oil supply and return circuit; 3. It needs to go through the rotary gap Oil is supplied to the inner ring, so that the oil pressure cannot be effectively transmitted to the inner bearing; 4. The main shaft of the ball mill is arranged vertically, and the lubricating oil is easier to leak from the lower end, and the oil leakage problem is difficult to solve

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