Spherical compressor

Abstract

The invention discloses a spherical compressor which comprises a cylinder body (7), a cylinder cover (6), a piston (1), a piston shaft (5), a rotary table (2), a main shaft (4), a housing (12), a compression disc (13) and a center pin (3), wherein the rigidity of each part of the piston (1), the rotary table (2), the piston shaft (5) and the cylinder cover (6) is not more than that of the main shaft (4), and the rigidity of at least one part of the piston (1), the rotary table (2), the piston shaft (5) and the cylinder cover (6) is less than that of the main shaft (4). According to the spherical compressor, the clamping stagnation problem of a rotor in a movement process, caused by dead points, friction factors, processing errors and the like of a mechanism movement of the spherical compressor is fundamentally solved; the invention is suitable for spherical compressors which are different in sizes and uses different mediums.

Description

technical field [0001] The invention relates to a spherical compressor, belonging to the technical field of compressors. Background technique [0002] Spherical compressor technology is a brand-new technological invention, and its technical core is a variable volume mechanism of space. The patent number applied for in 2003 is ZL03114505.1, and the patent name is "A Variable Capacity Type for Compressors" The technical solution disclosed in the Chinese patent of "Institution" is the basic structure of the technology. The advantages of this spherical compressor are: no inlet / exhaust valve, less moving parts, less vibration, high mechanical efficiency, reliable sealing, etc. In the past ten years, this technology has made great progress, and a number of research results have been produced successively. The application range of spherical compressors has become more and more extensive. Not only can it be used as a single-stage compression compressor, but it can also achieve mult...

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Problems solved by technology

[0003] However, the disadvantage of the spherical compressor is that the rotation of the piston is powered by the eccentric main shaft. When the main shaft rotates until the axis of the turntable coincides with the axis of the piston, the resultant force of the main shaft on the turntable is perpendicular to the axis of the piston and the turntable. The main shaft acts on the axis of the turntable. At this position, the force of the turntable cannot produce the torque components that drive the piston and the turntable to rotate around their respective axes, and cannot make the piston and turntable rotate. This is the dead point of the movement of the mechanism.

The force analysis is as follows: the main shaft rotates under the drive of the motor, and the main shaft acts on a driving force of the turntable. This driving force has a force to make the piston and the turntable rotate around their respective axes. When the axis of the turntable and the axis of the piston are close to the coincident position , the torque generated by the component force that makes the piston and the turntable rotate becomes smaller and smaller until it is zero, so before and after the axis of the piston and the axis of the turntable are close to coincident, the piston and the turntable cannot obtain enough torque to rotate around their respective axes. Rotation stagnation occurs, resulting in a motion dead point of the mechanism; when the motion dead point is the initial state or stops rotating in this state, it will not start next time

[0004] In addition, due to mechanical manufacturing and processing errors, it is difficult to accurately control the gap between the mating surfaces of spherical compressors. If the gap is too large, the friction force will decrease, but the gas sealing structure will be damaged and the leakage will increase; if the gap is too small, the friction between the spherical surfaces will When the force increases, when the magnitude of the frictional force is close to or greater than the component force of the main shaft acting on the turntable or piston to make the turntable or piston rotate, the turntable and piston lose the torque of rotation, the rotor is stuck, and the movement of the mechanism cannot continue

[0005] At the same time, due to manufacturing errors, machining errors in the parts of the rotor and assembly gaps between the parts of the rotor, there is a hysteresis phenomenon between the main shaft, the turntable and the piston, that is, the rotation of the turntable and the piston lags behind the rotation of the main shaft. The theoretically calculated dead point position will change

[0006] Combining the above points, the rotor system is prone to sticking during operation, especially when using different compression media, the friction situation is more complicated, even if the dead point of the mechanism is taken into consideration, the anti-dead point design measures, It is also difficult to completely eliminate the sticking phenomenon caused by processing errors

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