CN113374531B - Integral oil injection vortex expander - Google Patents
Integral oil injection vortex expander Download PDFInfo
- Publication number
- CN113374531B CN113374531B CN202110852817.1A CN202110852817A CN113374531B CN 113374531 B CN113374531 B CN 113374531B CN 202110852817 A CN202110852817 A CN 202110852817A CN 113374531 B CN113374531 B CN 113374531B
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- Prior art keywords
- oil
- oil pump
- sliding sheet
- cavity
- expander
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C1/00—Rotary-piston machines or engines
- F01C1/02—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F01C1/0207—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F01C1/0215—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01C13/04—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby for driving pumps or compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/04—Lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/20—Rotary pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention belongs to the technical field of vortex expanders. Aiming at the problems that the structure of a scroll expander adopting an external oil pump for supplying oil is complex, the volume is large, and an oil supply pump needs to be matched with the working condition of the expander, the invention provides an integrated oil injection scroll expander, wherein an oil pump rotor is arranged at the center of a movable scroll, an oil pump cavity is arranged at the center of a static scroll, the oil pump rotor and the oil pump cavity are both circular, the oil pump rotor and the oil pump cavity are in an eccentric state, and the eccentric distance is equal to the eccentric distance between the movable scroll and the static scroll; a sliding sheet groove is formed in the oil pump cavity, a sliding sheet is arranged in the sliding sheet groove, an elastic element is arranged at the bottom of the sliding sheet, and the elastic element provides a force for the sliding sheet to be always contacted with the oil pump rotor; and an oil inlet hole and an oil discharge hole are respectively arranged on two sides of the sliding vane, and the oil discharge hole is connected with the expansion cavity through an oil injection channel. The invention realizes automatic oil supply of the expansion machine and synchronous injection into the expansion cavity, simplifies the system structure, and improves the efficiency and the system compactness of the expansion machine.
Description
Technical Field
The invention belongs to the technical field of vortex expanders, and particularly relates to an integrated oil injection vortex expander.
Background
The low-temperature waste heat recovery is the key of energy conservation and emission reduction, and the recovery of the low-temperature waste heat by adopting an Organic Rankine Cycle (ORC) system is an important mode. The vortex expander has the characteristics of high efficiency, reliability, stability and the like, and has great advantages when being applied to a small ORC system.
Conventional scroll expanders typically use either a tiny oil (or no oil) or an external oil pump feed. Wherein, the micro-oil (or oil-free) vortex expander has low efficiency due to large leakage of the meshing clearance. The external oil supply mode needs to introduce the lubricating oil separated by the oil separator into a special lubricating oil pump to increase the pressure, and then the lubricating oil is sprayed into the interior of the expansion machine through the air suction hole or the high-pressure expansion cavity of the expansion machine so as to improve the efficiency of the expansion machine. This mode has not only increased oil pump and oil feed line, causes the system complicacy, area is big, and needs solitary external power drive oil pump, and pressure, the flow etc. of oil feed pump also difficult the matching with the expander operating mode.
Disclosure of Invention
Aiming at the problems that the scroll expander adopting an external oil pump for supplying oil has complex structure and large volume and the oil supply pump is difficult to be matched with the working condition of the expander, the invention provides the integrated oil injection scroll expander.
The invention is realized by the following technical scheme:
the integrated oil injection vortex expander comprises a shell and an expansion mechanism, wherein the expansion mechanism comprises a fixed vortex disk and an orbiting vortex disk, a vortex molded line of the orbiting vortex disk and a vortex molded line of the fixed vortex disk are mutually meshed to form an expansion cavity, a gas suction hole is formed in the fixed vortex disk, an oil pump rotor is arranged in the center of the orbiting vortex disk, an oil pump cavity is arranged in the center of the fixed vortex disk, the oil pump rotor and the oil pump cavity are both circular, the oil pump rotor and the oil pump cavity are in an eccentric state, and the eccentric distance is equal to the eccentric distance between the orbiting vortex disk and the fixed vortex disk; the oil pump rotor is characterized in that a sliding sheet groove is formed in the oil pump cavity, a sliding sheet is arranged in the sliding sheet groove, the depth of the sliding sheet groove is larger than the height of the sliding sheet, the sliding sheet can slide up and down in the groove, an elastic element is arranged at the bottom of the sliding sheet, and the elastic element provides a force for the sliding sheet to be always contacted with the oil pump rotor; and an oil inlet hole and an oil discharge hole are respectively arranged on two sides of the sliding vane, and the oil discharge hole is connected with the expansion cavity through an oil injection channel.
Further, the elastic element is a spring and is in a pre-compression state.
Further, the oil injection passage is arranged in the air suction cavity, so that oil is injected from the position where the expansion is started.
The invention also provides an organic Rankine cycle system which comprises the integrated oil injection vortex expander.
The invention designs the integrated vane oil pump at the center of the expander by utilizing the motion law of the movable vortex disk and the static vortex disk, so that the oil pump synchronously rotates in the operation process of the expander, and the low-pressure lubricating oil is automatically pressurized and sprayed into the expansion cavity, thereby effectively improving the efficiency of the expander. Compared with the conventional device, the invention omits additional external oil pumps, oil passages and other auxiliary systems, fully utilizes the central area space of the scroll plate, utilizes the energy recovered by the expansion machine to drive the pump to rotate, and can realize the automatic matching of the oil injection quantity and the operation characteristic of the expansion machine by utilizing the synchronous motion rule of the oil pump and the scroll plate.
The integrated vortex expansion machine is used for an ORC system, the structure of the ORC system can be greatly simplified, the power recovered by the vortex expansion machine can be directly utilized for driving, the system efficiency is improved, and the rotating speed synchronous with the expansion machine is favorable for automatically matching the oil supply quantity.
Drawings
FIG. 1 is a schematic structural view of a scroll expander according to an embodiment;
FIG. 2 is an exploded view of the fixed and orbiting scrolls of the scroll expander of the embodiment;
FIG. 3 is another exploded angular view of the fixed and orbiting scrolls of the scroll expander of the embodiment;
FIG. 4 is a schematic view showing the overall structure of the scroll expander according to the embodiment;
FIG. 5 is a schematic view of another angle overall configuration of the scroll expander of the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments and the accompanying drawings.
Examples
An integrated oil injection vortex expander comprises a shell and an expansion mechanism, wherein the shell is provided with a closed space, the expansion mechanism is arranged in the shell, and the expansion mechanism comprises a fixed vortex disc 1 and a movable vortex disc 2 as shown in figures 2-5 (the structure of the shell is the prior art, the shell is not innovatively improved in the embodiment, so that the structural part of the shell is omitted in the figures).
The scroll plate of the movable scroll 2 and the scroll plate of the fixed scroll 1 are engaged with each other to form a closed expansion chamber. As shown in fig. 5, the fixed scroll 1 is provided with a suction port 3, and the suction port 3 communicates with a suction chamber of the scroll expander.
As shown in fig. 1-3, an oil pump rotor 10 is disposed at the center of the orbiting scroll 2, an oil pump cavity 9 is disposed at the center of the fixed scroll 1, the oil pump rotor 10 and the oil pump cavity 9 are both circular, and both are in an eccentric state, and the eccentricity is equal to the eccentricity of the orbiting scroll 2 and the fixed scroll 1.
Set up the gleitbretter groove on the oil pump cavity 9, set up gleitbretter 6 in the gleitbretter groove, the gleitbretter groove degree of depth is greater than the gleitbretter height, and gleitbretter 6 can slide from top to bottom in the inslot, and the bottom of gleitbretter 6 sets up spring 5, and the spring is the precompression state, and under the effect of spring force, gleitbretter 6 and oil pump rotor 10 contact.
And an oil inlet hole 4 and an oil discharge hole 7 are respectively arranged on two sides of the sliding vane 6, and the oil discharge hole 7 is connected with the expansion cavity through an oil filling channel 8. The oil injection channel 8 is formed on the wall of the oil pump cavity 9, and can be one or more, so that lubricating oil is continuously injected into the expansion cavity. Preferably, the oil injection passage 8 is provided in the suction chamber to inject oil from the position where the expansion is most started.
When the scroll expander works, high-pressure gas enters an expansion cavity through the gas suction hole 3 and pushes the movable scroll 2 to do plane rotation motion around the fixed scroll 1, at the moment, the oil pump rotor 10 synchronously does plane rotation motion in the oil pump cavity 9, the oil pump rotor 10 is always meshed with the oil pump cavity 9 by the same eccentricity, and the motion rule is the same as that of the movable scroll and the fixed scroll. Meanwhile, the sliding vane 6 is contacted with the oil pump rotor 10 under the action of the spring force, two independent closed working chambers are formed on two sides of the sliding vane 6, and the volumes of the two working chambers are changed along with the rotation angle of a power output shaft of a vortex expander connected with the movable vortex disc. After high-pressure oil enters the right working cavity through the oil inlet hole 4, the high-pressure oil is discharged from the oil discharge hole 7 in the left working cavity along with the reduction of the volume of the working cavity, and then lubricating oil is injected into the expansion cavity through the oil injection channel 8.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (4)
1. The integrated oil injection vortex expander comprises a shell and an expansion mechanism, wherein the expansion mechanism comprises a fixed vortex disk and a movable vortex disk, a vortex molded line of the movable vortex disk and a vortex molded line of the fixed vortex disk are meshed in a staggered manner to form a closed expansion cavity, and a gas suction hole is formed in the fixed vortex disk; the oil pump rotor is characterized in that a sliding sheet groove is formed in the oil pump cavity, a sliding sheet is arranged in the sliding sheet groove, the depth of the sliding sheet groove is larger than the height of the sliding sheet, the sliding sheet can slide up and down in the groove, an elastic element is arranged at the bottom of the sliding sheet, and the elastic element provides a force for the sliding sheet to be always contacted with the oil pump rotor; and an oil inlet hole and an oil discharge hole are respectively arranged on two sides of the sliding vane, and the oil discharge hole is connected with the expansion cavity through an oil injection channel.
2. The integrated oil-injected scroll expander of claim 1, wherein the resilient element is a spring in a pre-compressed state.
3. The integrated oil-injected scroll expander according to claim 1, wherein the oil injection passage is provided in the suction chamber so that oil is injected from a position where expansion is most started.
4. The integrated, oil-injected scroll expander of claim 1, wherein the integrated, oil-injected scroll expander is used in an organic rankine cycle system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110852817.1A CN113374531B (en) | 2021-07-27 | 2021-07-27 | Integral oil injection vortex expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110852817.1A CN113374531B (en) | 2021-07-27 | 2021-07-27 | Integral oil injection vortex expander |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113374531A CN113374531A (en) | 2021-09-10 |
| CN113374531B true CN113374531B (en) | 2022-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110852817.1A Active CN113374531B (en) | 2021-07-27 | 2021-07-27 | Integral oil injection vortex expander |
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| CN (1) | CN113374531B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009024546A (en) * | 2007-07-18 | 2009-02-05 | Mitsubishi Electric Corp | Scroll expander |
| US8475149B2 (en) * | 2008-04-07 | 2013-07-02 | Mitsubishi Electric Corporation | Scroll fluid machine having multiple discharge ports |
| JP6102292B2 (en) * | 2013-01-31 | 2017-03-29 | アイシン精機株式会社 | Trochoid pump |
| CN105089705B (en) * | 2015-09-11 | 2018-03-06 | 山东科灵节能装备股份有限公司 | Fixed scroll and scroll expander and generating set |
| CN105089704A (en) * | 2015-09-11 | 2015-11-25 | 山东科灵节能装备股份有限公司 | Self-lubricating vortex expansion power generation set |
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2021
- 2021-07-27 CN CN202110852817.1A patent/CN113374531B/en active Active
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| Publication number | Publication date |
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| CN113374531A (en) | 2021-09-10 |
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