Screw rotor device
a rotor expansion and screw technology, applied in the direction of intermeshing engagement type engines, rotary or oscillating piston engines, rotary piston engines, etc., can solve the problems of premature damage or wear of the device components, and achieve the effect of inhibiting the rotor from ceasing
Inactive Publication Date: 2019-10-24
ROTOR DESIGN SOLUTIONS
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The invention provides a gap between the rotors at the high pressure end of the device. This helps prevent the rotors from touching each other in the region that is exposed to the highest stresses. As a result, the rotors are less likely to stop working or become permanently attached to each other.
Problems solved by technology
It has been observed that, in the case of screw compressors, this meshing contact between the rotors can result in vibrations, which may damage or wear components of the device prematurely.
Method used
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Embodiment Construction
[0044]Referring now to the Figures, there is shown a screw rotor device 1 according to an embodiment of the invention. In this embodiment, the screw rotor device 1 includes a housing or casing 2, a first rotor 3 and second rotor 4 both rotatably mounted within the housing 2, a coupling shank 5 connected to the first rotor 3 and extending from one of its ends, a high pressure port 6 located at a first end of the housing 2 and a low pressure port 7 located at a second end of the housing 2. The screw rotor device 1 according to this embodiment may be configured to operate as either an expander, in which case the coupling shank 5 may be coupled to a generator (not shown), or as a compressor, in which case the coupling shank 5 may be coupled to a drive motor (not shown). The high pressure port 6 functions as an inlet 6 when the screw rotor device 1 is configured to operate as an expander or an outlet when configured to operate as a compressor. Similarly, the low pressure port 7 functions...
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A screw rotor device includes a first rotor having a plurality of helical lobes about its periphery, a second rotor having a plurality of helical flutes about its periphery and a housing with a high pressure port and a low pressure port. The first and second rotors are rotatably mounted within the housing such that the lobes intermesh with the flutes for conveying, in use, a fluid between the high pressure port and the low pressure port. At least one of the rotors has a helical profile that changes along its length such that a gap is described between intermeshing lobes and flutes adjacent the high pressure port which is larger than a gap described between intermeshing lobes and flutes adjacent the low pressure port. The screw rotor device may be used for conveying a fluid.
Description
TECHNICAL FIELD[0001]This invention relates generally to screw rotor devices for conveying a fluid. More specifically, although not exclusively, this invention relates to screw rotor expanders, e.g. for capturing or recovering energy from a pressurised fluid, such as steam or vehicle exhaust gases, and to compressors.BACKGROUND[0002]Conventional screw rotor machine designs include two or more rotors enclosed within a housing or casing that surrounds the outer surface of the threads of the rotor to provide radial containment of a fluid to be conveyed. The rotors generally include a male rotor with a series of helical lobes about its periphery and a female rotor with a series of cooperating helical flutes. Typically, the female rotor is driven by the rotation of the male rotor.[0003]The flutes of the female rotor are shaped to cooperate with the lobes of the male rotor as the rotors rotate relative to one another to convey a fluid along the device. The outer surfaces of each intermesh...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F01C1/08F01C21/08
CPCF01C21/08F01C1/082
Inventor DAVEY, DANIEL WILLIAM
Owner ROTOR DESIGN SOLUTIONS