Screw compressor with oil return unit
A screw type and compressor technology, applied in the direction of rotary piston machinery, rotary piston pumps, pump components, etc., can solve problems such as fixed, inflexible oil return, and pressure levels that cannot be simply matched
Active Publication Date: 2022-03-18
HANON SYST
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Problems solved by technology
[0008] The above-mentioned two-stage throttling of refrigerant oil has the disadvantage that the element forming the helical groove is fixed and adapted to the specific application and is not designed to be adapted to changing conditions
[0009] The disadvantages of the prior art are generally that the oil return is inflexible and the pressure level cannot be easily adapted to other structural design solutions
Method used
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Embodiment Construction
[0044] exist figure 1 A detailed sectional view of a part of a screw compressor 1 with an oil return unit 2 is shown in . The screw compressor 1 has a stationary screw 11 and an orbiting screw 12 which moves within the stationary screw. Spaces which vary during operation and which, depending on the orientation of the spirals 11 , 12 relative to each other, are produced between the spirals have a low pressure or a high pressure. The refrigerant gas-oil mixture enters the high-pressure chamber 8 at high pressure, wherein the oil settles in the high-pressure chamber 8 after the compression process and is fed from there via the oil return unit 2 to the suction pressure chamber 9 .
[0045] Refrigerant gas is drawn in from the suction pressure chamber 9 with the oil, is compressed again between the screws 11 , 12 and is conveyed into the high pressure chamber 8 , the circuit being closed.
[0046] The oil return unit 2 is used to convey the separated oil after the compression pro...
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The invention relates to a screw compressor (1) with an oil return unit (2) having a stationary screw (11) and an orbiting screw (12) which feed gas from a suction pressure chamber (9) Compressed into the high pressure chamber (8), where the back pressure chamber (10) is connected with the orbiting screw and presses the orbiting screw to the stationary screw, and the oil return unit has a back pressure screw nozzle (3) and suction Pressure spiral nozzle (4), the back pressure spiral nozzle (3) has a high-pressure channel (5) connected at the end side for oil supply, and the suction pressure spiral nozzle (4) has a A suction pressure passage (6) for leading oil into the suction pressure chamber, and a back pressure passage (7) for leading oil into the back pressure chamber is provided between the back pressure spiral nozzle and the suction pressure spiral nozzle ), characterized in that the back pressure helical nozzle consists of a cylindrical chamber (21) in the stationary helix and the helical nozzle insert (20), while the suction pressure helical nozzle consists of a The cylindrical chamber (22) and the spiral nozzle insert constitute, and the cylindrical chamber in the stationary spiral has a widening area (15), in which the spiral nozzle insert does not contact the cylindrical chamber (21) CONTACT.
Description
technical field [0001] The invention relates to a screw compressor which is designed in particular for use in a motor vehicle air conditioning system. Background technique [0002] This type of screw compressor is equipped with an oil return unit which enables refrigerant oil with a certain proportion of dissolved refrigerant to be returned from the high pressure side of the compressor to the suction pressure side in order to distribute the lubricant as much as possible The short path feeds the lubricated and thus the active parts in the compressor again. [0003] In screw compressors, also known as scroll compressors, an orbiting screw surrounds a stationary screw, also called a fixed screw. The movement of the orbiting screw is associated with the formation of a compression space into which refrigerant gas is first sucked in, then compressed during the rotation of the screw and finally output to the high-pressure chamber. For the movement of the orbiting screw, lubricati...
Claims
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IPC IPC(8): F04C18/02F04C29/02
CPCF04C18/0223F04C29/02F04C29/026F04C18/0215F04C29/028F04C27/005F05B2260/98F04C2210/26F04C18/0246
Inventor 迪尔克·古特贝勒特卡迪尔·杜尔孙迈克尔·弗里德尔
Owner HANON SYST