JP5382559B1 - Rotary fluid machine - Google Patents

Abstract

An object of the present invention is to provide a rotary fluid machine having a simple structure, a small number of parts, and capable of low-cost production.
SOLUTION: A fluid transfer rotor 362 is rotatably housed in a rotor working chamber 360, and first and second movable closures 368, 368A are housing 352 so as to intersect a first outlet 358 and a second outlet 358A. The curved seal portion 376a of the first and second movable closures is slid on the fluid transfer rotor while the communication between the first inlet 356 and the outlet 358 and the communication between the second inlet 356A and the outlet 358A are blocked. The fluid concave portions 366A, 366B, and 366C are brought into fluid-tight sliding contact with each other, and fluid is forcibly discharged from the first outlet and the second outlet through the opening 376b formed on the rear side of the curved seal portion. The structure simplifies the structure of the rotary fluid machine.
[Selection] Figure 2

Description

The present invention relates to a fluid machine, and more particularly to a rotary fluid machine.

  In recent years, vane-type rotary fluid machines have attracted attention as rotary fluid machines. Patent Document 1 proposes a vane-type rotary fluid machine in which slot-like spaces are provided radially at a number of divided positions of a rotor and a number of vanes are supported in these slot-like spaces so as to be capable of reciprocating.

US Pat. No. 6,884,051 (Japanese Patent Laid-Open No. 2001-336492)

  By the way, in the rotary fluid machine disclosed in Patent Document 1, static pressure is applied between the rotor and the vane in order to prevent galling at the sliding portion between the slot-like space and the vane, thereby causing seizure and wear. A bearing is configured, and the vane is supported in a floating state by the hydrostatic bearing. The rotary fluid machine having this structure has a large number of parts and a large number of sliding parts, so that the overall structure is complicated, and it takes a lot of time to assemble a large number of parts. A large number of sliding portions are liable to cause friction loss and increase energy consumption. Therefore, gaps are formed between the slot-like space and the vanes to allow smooth reciprocating motion of the vanes. For this reason, since the leak of the pressurized fluid occurs through these gaps, it is difficult to improve the conversion efficiency from pressure energy to mechanical energy. In addition, since the rotary fluid machine having this structure cannot obtain an ultra-high discharge pressure due to structural features, it has been difficult to use as a fluid machine for generating an ultra-high pressure such as a compressor or a pump. Moreover, in the rotary fluid machine having this structure, due to its structural characteristics, the discharge amount of the pressurized fluid cannot be increased to increase the capacity.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a rotary fluid machine having a small number of parts, a simple structure, and capable of low-cost production.

  According to the present invention, the rotary fluid machine includes a first inlet and an outlet that are adjacent to each other in the circumferential direction and a pair, and a second inlet that is adjacent to each other in the circumferential direction and make a pair. And a housing having a rotor working chamber having an outlet, and a fluid transfer rotor supported by a drive shaft extending in the axial direction at the center of the rotor working chamber and rotatably accommodated in the rotor working chamber. , At least one lobe that rotates and moves along the inner circumferential surface of the rotor working chamber, and a front edge formed in a radially inner region of the lobe at a circumferential front edge and a circumferential rear edge of the lobe, respectively. The fluid transfer rotor having a sliding recess and a trailing edge sliding recess, and the housing so as to cross the first outlet and the second outlet, respectively. Extending to the front edge sliding recess and the rear edge sliding recess of the fluid transfer rotor while blocking the communication between the first inlet and the outlet and the communication between the second inlet and the outlet, respectively. A first seal having a curved seal portion that is in air-tight or water-tight sliding contact, and an opening that is formed on the rear side of the curved seal portion and communicates with the first outlet and the second outlet, respectively. A second movable closure is provided, and the rotor working chamber, the fluid transfer rotor, and the first and second movable closures all have a surface-treated lubricant film layer.

Preferably, the fluid transfer rotor includes side wall surfaces disposed on both sides in the axial direction of the leading edge sliding recess and the trailing edge sliding recess, and the first and second movable closures are respectively connected to the fluid from the housing. First and second oscillating members extending in a tangential direction of the transfer rotor, and first and second springs pressing the tip ends of the first and second oscillating members against the outer periphery of the fluid transfer rotor, respectively. Means.

  In the present invention, the rotary fluid machine is configured with an extremely small number of parts such as a housing, a fluid transfer rotor, and first and second movable closures. Since the rotor working chamber, the fluid transfer rotor, and the first and second movable closures are hermetically adhered to each other through the surface-treated lubricating film layer, the leakage of pressurized fluid between related members is suppressed. An ultra-high pressure fluid or an ultra-high vacuum can be generated. Since this rotary fluid machine has a very simple structure and a small number of parts, it is possible to arrange multiple stages of rotary fluid machines in tandem in the axial direction. The discharge amount can be dramatically increased while discharging a liquid such as water, oil, etc. at an ultra high pressure of 300 MPa or more at 1,000 atmospheres or more. Therefore, the rotary fluid machine of the present invention includes various compressors such as air compressors, process gas compressors, LNG boil-off gas compressors, fuel filling compressors for natural gas automobiles, compressors for molding PET bottles, water and sewerage water supply pumps, Emergency drain pump, fire pump, chemical plant process pump, boiler feed pump, food / drink water feed pump, etc., ultra-high vacuum pump, high pressure supercharger, high pressure fluid expander It has a wide range of applications as an ultra-high-pressure and large-capacity fluid machine such as a hydraulic motor pump for construction machinery (with motor / pump function) and an ultra-high pressure pump for ship propulsion.

1 shows a partially cutaway schematic overview of a rotary fluid machine according to an embodiment of the present invention. II-II sectional drawing of the rotary fluid machine of FIG. 1 is shown.

  Hereinafter, a rotary fluid machine according to an embodiment of the present invention will be described in detail based on the drawings. As shown in FIGS. 1 and 2, the rotary fluid machine 350 of the present invention is illustrated as being coaxially coupled directly to the electric motor 200, but the present invention is not limited to this drive system, and may be based on other prime movers. You may comprise so that it may drive via a power transmission means.

  As shown in FIG. 2, the rotary fluid machine 350 includes a cylindrical housing 352 concentrically supported with respect to the electric motor 200, and end plates 354 and 355. The housing 352 includes a pair of inlets 356 and 356A for taking in fluid, a pair of outlets 358 and 358A for discharging pressurized fluid, a rotor working chamber 360 in which the inlets 356 and 356A and the outlets 358 and 358A are opened, and the electric motor 200. A disk-shaped fluid transfer rotor 362 that is drivingly connected to the driving shaft 132 that is drivingly connected by press-fitting or other connecting means and that is rotatably accommodated in the rotor working chamber 360. The disk-shaped fluid transfer rotor 362 includes a lubricating oil passage 362a extending radially outward from the main lubricating oil supply passage 132L, a lubricating oil supply port 362b, and a small amount of lubricating oil from the lubricating oil supply port 362b to the outer peripheral end of the lobe 364. A porous plug 362c capable of supplying The main lubricating oil supply passage 132L is supplied with lubricating oil from an external lubricating oil supply system (not shown). In another aspect, a lubricating oil supply system similar to that disclosed in Japanese Patent No. 5103570 by the same inventor's patent application is provided in the rotary fluid machine 350, and the lubricating oil pump of this system is connected to the main lubricating oil. The supply passage 132L may communicate with the supply passage 132L. However, if it is not desired to contaminate the fluid with the lubricant depending on the application of the rotary fluid machine 350, the above-described lubrication structure may be omitted.

The disk-shaped fluid transfer rotor 362 sucks fluid from the inlets 356 and 356A while rotating and moving along the inner peripheral surface of the rotor working chamber 360, and discharges it from the outlet 358 while pressurizing the sucked fluid. Lobes 364A, 364B, and 364C formed at intervals, and sliding recesses 366A, 366B, and 366C formed in the radially inner region of the lobes 364A, 364B, and 364C and the axially inner region of the side wall surface 362s are provided. The sliding recess 366A of the lobe 364A functions as a trailing edge sliding recess, and the sliding recess 366B of the lobe 364A functions as a leading edge sliding recess. In FIG. 2, the upper inlet 356 and outlet 358 form a first pair, and these inlet 356 and outlet 358 are referred to as a first pair of inlet and outlet. Similarly, the lower inlet 356A and outlet 358A form a second pair, and these inlet 356A and outlet 358A are referred to as a second pair of inlet and outlet.

  First and second movable closures 368 and 368A that extend so as to intersect the first outlet 358 and the second outlet 358A are operable inside the housing 352 at a position adjacent to the outer periphery of the disk-shaped fluid transfer rotor 362. Is housed in. The first and second movable closures 368 and 368A include swing members 376 and 376A that rotate on the housing 352 via pivot shafts 374 and 374A, respectively. At the tip of the swinging members 376, 376A are lobes 364A, 364B, 364C, curved seal portions 376a, 376a that are in sliding contact with the sliding recesses 366A, 366B, 366C, and openings 376b, 376b formed at the rear thereof. Is provided. Press springs 380 and 380A press the rocking members 376 and 376A toward the fluid transfer rotor 362 in the spring accommodating portions 378 and 378A formed in the housing 352. The curved seal portions 376a are disposed adjacent to the first and second outlets 358 and 358A, respectively, and are arranged on the outer periphery of the disk-shaped fluid transfer rotor 362 while blocking communication between the first inlet 356 and the outlet 358, respectively. Make fluid-tight sliding contact. Here, “fluid-tight” means “air-tight” when handling gas or air, “water-tight” when handling water, and “oil-tight” when handling oil. This means that air, water, liquid, and other fluids are maintained in a sealed state and are not easily leaked between components that cooperate with each other.

  In the rotor working chamber 360, a fluid suction chamber 370A is formed between the first movable closure 368 and the trailing edge sliding recess 366A. Similarly, in the rotor working chamber 360, a fluid discharge chamber 370B is formed between the leading edge sliding recess 366B and the second movable closure 368A. A sliding recess 366C between the two lobes 364B, 364C functions as a fluid transfer chamber 370C.

  Each of the rotor working chamber 360, the disk-shaped fluid transfer rotor 362, and the first and second movable closures 368 and 368A has a lubricating coating layer surface-treated with diamond-like carbon or tungsten disulfide. Diamond-like carbon is formed by a composite multilayer coating by plasma sputtering and plasma CVD processing, and is known to achieve seizure limit loads of up to 2000 kgf under no lubrication and 2500 kgf or more under lubrication. The lubrication layer made of tungsten disulfide was used as part of NASA's space technology development, and is formed by a coating technique using “DAICRONITE” (registered trademark of US Diclonite).

  Under the action of the rotary fluid machine 350, when the lobe 364A of the fluid transfer rotor 362 passes through the curved seal portion 376a of the first movable closure 368 and moves to the position shown in FIG. 2, negative pressure is generated in the fluid suction chamber 370A. Then, the fluid is sucked from the first inlet 356 into the fluid suction chamber 370A. At this time, the fluid existing in the fluid discharge chamber 370A is forcibly moved in the circumferential direction by the lobe 364A of the fluid transfer rotor 362 and discharged from the second outlet 358A to the outside under pressure. On the other hand, when the lobe 364C of the fluid transfer rotor 362 passes through the curved seal portion 376a of the second movable closure 368A, negative pressure is generated and fluid is sucked from the second inlet 356A into the fluid transfer chamber 370C. The fluid in the fluid transfer chamber 370C is forcibly transferred by the lobe 364B when the fluid transfer rotor 362 rotates clockwise. By moving the lobe 364B further clockwise in FIG. 2, when the fluid transfer chamber 370C communicates with the first outlet 358 via the first movable closure 368, the fluid is discharged to the outside under pressure. In this way, the fluid sucked from the inlet is forcibly discharged from the outlet to the outside under pressure by the clockwise rotation of the fluid transfer rotor 362.

The rotary fluid machine according to the embodiment of the present invention has been described above with reference to the drawings. However, these show only one embodiment, and the present invention has various modifications and improvements based on the knowledge of those skilled in the art. It can be implemented in the added mode. For example, although the side wall surface of the disk-shaped fluid transfer rotor is shown as an integral structure with the rotor body, the rotor body and the side wall surface are composed of separate parts, and the rotor body is sandwiched between two disks. These components may be integrated with a knock pin or other fixing means. Moreover, you may comprise so that the backflow of the discharged fluid may be prevented by arrange | positioning the discharge valve apparatus which consists of a non-return valve to a 1st, 2nd outlet.

132 Drive shaft; 200 Electric motor; 352 Housing; 362 Disc fluid transfer rotor; 356, 356A First and second inlets; 358, 358A First and second outlets; 362A, 364B, 364C Robes; Second movable closure

Claims (2)

A housing having a rotor working chamber having a first inlet and an outlet that are adjacent to each other in the circumferential direction and a pair, and a second inlet and an outlet that are adjacent to each other in the circumferential direction and are paired When,
A fluid transfer rotor supported by a drive shaft extending in the axial direction at the center of the rotor working chamber and rotatably accommodated in the rotor working chamber, wherein the fluid transfer rotor rotates along the inner peripheral surface of the rotor working chamber Fluid transfer having at least one lobe and a leading edge sliding recess and a trailing edge sliding recess respectively formed in a radially inner region of the lobe at a circumferential front edge and a circumferential rear edge of the lobe. A rotor,
Extending from the housing to intersect the first outlet and the second outlet, respectively, the communication between the first inlet and the outlet and the communication between the second inlet and the outlet are blocked. However, a curved seal portion that fluidly slidably contacts the leading edge sliding recess and the trailing edge sliding recess of the fluid transfer rotor, and the first outlet formed on the rear side of the curved seal portion. And first and second movable closures each having an opening communicating with each of the second outlets,
The rotary fluid machine, wherein the rotor working chamber, the fluid transfer rotor, and the first and second movable closures all have a surface-treated lubricant film layer. The fluid transfer rotor includes side wall surfaces disposed on both axial sides of the leading edge sliding recess and the trailing edge sliding recess, and the first and second movable closures are respectively connected to the fluid transfer rotor from the housing. First and second swinging members extending in a tangential direction, and first and second spring means for pressing the tip portions of the first and second swinging members against the outer periphery of the fluid transfer rotor, respectively. The rotary fluid machine according to claim 1, further comprising a rotary fluid machine.

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