A rotary compressor oil suction structure and design method thereof
A design method and compressor technology, applied in mechanical equipment, rotary piston type/swing piston type pump components, machines/engines, etc., can solve the problems of low oil level, influence of lubrication reliability, etc. Effect
Active Publication Date: 2019-03-05
XIAN QINGAN REFRIGERATION EQUIP CO LTD
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Problems solved by technology
When running at high speed, due to the strong oil absorption capacity of the oil absorption structure, the oil level in the oil pool will be too low, which will affect the reliability of lubrication
Method used
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[0021] see figure 1 and figure 2 As shown, the present invention provides a rotor compressor oil suction structure, including a crankshaft 1, an oil pool 2, and an oil suction pipe 3; Lengthened with the crankshaft short shaft 1-1 to meet the depth requirements of the oil pool 2; the length of the oil suction pipe 3, the matching length of the crankshaft short shaft 1-1 and the height of the oil pool 2 cooperate with each other to adapt to the large oil filling volume and high-speed operation of the compressor Lubrication requirements for oil level height.
[0022] First, determine the depth h of the required oil pool 2 according to the amount of oil injected 1 , to ensure that the height of the static oil level is not higher than the height h of the exhaust port of the muffler cover on the pump body 6 ;
[0023] Second, according to h 1 Depth and initial crankshaft minor axis 1-1 length h 3 , determine the length h of the short axis of the crankshaft exposed by the oil...
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The invention discloses an oil suction structure of a rotary compressor and a design method thereof. The oil suction structure comprises a shell, a crankshaft and an oil suction pipe, wherein the crankshaft and the oil suction pipe are mounted in the shell. An oil pool is formed on the bottom of the shell. The crankshaft comprises a short shaft matched with a lower bearing. The oil suction pipe is fixed to the short shaft of the crankshaft in an interference fit mode. An oil suction pipe port of the oil suction pipe is located at the end close to the bottom of the oil pool. According to the oil suction structure of the rotary compressor and the design method thereof, the oil suction pipe is fixed to the crankshaft in the interference fit mode, and the oil suction pipe and the short shaft of the crankshaft are lengthened so as to adapt to the depth of the oil pool; and through reasonable cooperation of the length of the oil suction pipe, the length of the short shaft of the crankshaft and the depth of the oil pool, the technical problem that according to an existing design method for the structure of a rotary compressor, the requirement for a large lubricating oil injection amount and the requirement of lubrication for the oil level during high-speed operation are solved, and the purpose of reliably using the rotary compressor on a direct-current variable-frequency air conditioner is achieved.
Description
technical field [0001] The invention relates to the technical field of refrigeration compressors, in particular to an oil suction structure of a rotary compressor. Background technique [0002] In the field of household air-conditioning applications, with the expansion of the application of DC frequency conversion technology, the requirements for the use of rotary compressors are also increasing. Compared with conventional fixed frequency air conditioners, the volume of the heat exchanger of the DC inverter air conditioner is larger, and the refrigerant charge is also larger. Since the ratio of oil to refrigerant in the air conditioner is generally not less than 0.40, when the refrigerant charge in the air conditioner is large, a corresponding amount of oil is required to ensure the normal use of the compressor. Generally speaking, the requirements for oil filling inside the compressor are as follows: after filling, the highest static oil level cannot be higher than the pos...
Claims
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IPC IPC(8): F04C29/02
CPCF04C29/02
Inventor 伦成钢杜红波
Owner XIAN QINGAN REFRIGERATION EQUIP CO LTD