CN209761716U - Water-spraying oil-free screw compressor - Google Patents
Water-spraying oil-free screw compressor Download PDFInfo
- Publication number
- CN209761716U CN209761716U CN201920330656.8U CN201920330656U CN209761716U CN 209761716 U CN209761716 U CN 209761716U CN 201920330656 U CN201920330656 U CN 201920330656U CN 209761716 U CN209761716 U CN 209761716U
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- compression
- water
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- bearing
- oil
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- 238000005507 spraying Methods 0.000 title claims description 9
- 238000007906 compression Methods 0.000 claims abstract description 70
- 230000006835 compression Effects 0.000 claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims abstract description 10
- 239000010687 lubricating oil Substances 0.000 claims description 15
- 230000001360 synchronised effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model relates to a water spray oil-free screw compressor belongs to compressor technical field. The utility model comprises an engaging rotor pair, a shell, an end cover and a driving mechanism for driving the engaging rotor pair to rotate, wherein a front bearing cavity, a compression cavity and a rear bearing cavity are sequentially arranged in the shell from front to back; it is characterized in that: the sealing structure also comprises a front sealing body and a rear sealing body; the casing is provided with and is used for injecting into or spout into the water inlet structure of water toward the compression intracavity, and preceding seal is fixed and is used for keeping apart preceding bearing chamber and compression chamber between preceding bearing chamber and the compression chamber, and the back seal is fixed and is used for keeping apart back bearing chamber and compression chamber between back bearing chamber and the compression chamber. The utility model has the advantages of reasonable design, the overall arrangement science, convenient to use.
Description
Technical Field
The utility model relates to a water spray oil-free screw compressor belongs to compressor technical field.
Background
The oil-free compressor has the advantages that the discharged gas does not contain lubricating oil, so that the oil-free compressor is more and more widely applied to industry, and the future development prospect is wide along with the continuous progress of the technology.
The oil-free compressor applied to the market at present has two forms, one is a dry oil-free compression form, no lubricating medium is added in the compression process, dry gas compression is kept, parts such as a compressor bearing and the like are lubricated by lubricating oil, and the lubricating oil is prevented from entering a compression cavity through a sealing system; the other type is a wet oil-free compression mode based on water lubrication, a compression cavity, a bearing and the like all adopt water as a lubricating medium, and oil-free compressed gas conveying can also be realized.
The prior oil-free compressor has the following problems:
(1) The dry oil-free compression mode has the defects of high exhaust temperature, low single-stage compression internal pressure ratio, poor compression energy efficiency and the like. Because the gas is compressed in a pure dry mode, the temperature of the output gas can be increased along with the increase of the compression ratio of the gas in the compression process, therefore, under the condition of the prior art, in order to avoid the overhigh exhaust temperature, the output pressure of the gas can be only controlled, the internal pressure ratio of the single-stage compressor can only be kept at about 3.5, and if the internal pressure ratio is more than 3.5, the multi-stage compression is realized; further, since the compressor gap is sealed without a lubricating medium due to pure dry oil-free compression, internal leakage between compressor parts is increased, resulting in poorer energy efficiency of the dry oil-free compressor than that of the oil compressor.
(2) The wet water lubrication compressor has the defects of over-low exhaust temperature, more microorganism propagation, difficult control of the service life of the sliding bearing and the like. At present water lubricated compressor, mostly adopt the sliding bearing structure based on water spray lubrication, slide bearing life-span control is more difficult with antifriction bearing comparison, because there is a large amount of water to spout into in addition, compressor output temperature is less than 100 degrees centigrade, in gas compression and hydrologic cycle process, has a large amount of microorganism to breed, influences exhaust quality.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a water spray oil-free screw compressor. The water-spraying oil-free screw compressor is reasonable in structural design, scientific in layout and convenient to use, and can solve the problems existing in the existing oil-free compressor.
the utility model provides a technical scheme that above-mentioned problem adopted is: the water-spraying oil-free screw compressor comprises a meshing rotor pair, a shell, an end cover and a driving mechanism for driving the meshing rotor pair to rotate, wherein a front bearing cavity, a compression cavity and a rear bearing cavity are sequentially arranged in the shell from front to back; the structure is characterized in that: the lubricating oil in the front bearing cavity is prevented from being sucked into the front sealing body in the compression cavity, and the lubricating oil in the rear bearing cavity is prevented from being sucked into the rear sealing body in the compression cavity; the casing is provided with and is used for toward the water inlet structure of compression intracavity injection or spout into water, preceding seal is fixed between preceding bearing chamber and compression chamber and is used for keeping apart preceding bearing chamber and compression chamber, the back seal is fixed between back bearing chamber and compression chamber and is used for keeping apart back bearing chamber and compression chamber.
Further, the number of the rotors in the meshing rotor pair is 2 or 3, and a gap exists between the adjacent rotors.
Further, actuating mechanism is synchronous gear, synchronous machine or servo motor, and the drive position is located admit air side or exhaust side.
Further, the water spray oil-free screw compressor is a single-stage compressor or a multi-stage compressor.
Compared with the prior art, the utility model, have following advantage and effect: compared with a dry oil-free compressor, the utility model can obtain higher single-stage compression internal pressure ratio and realize higher exhaust pressure by combining multi-stage compression; water is sprayed in the compression cavity, so that the internal clearance of the compression cavity can be sealed, and higher energy efficiency than dry oil-free compression can be obtained; the water spraying amount is controlled, higher exhaust temperature can be obtained, microorganisms can be effectively killed, and the cleanliness of the supplied air is improved.
The meshing rotor pair sucks gas through rotary motion, and discharges pressure gas through internal compression; the meshed rotor pair keeps synchronous rotation movement, and rotors in the meshed rotor pair are in clearance non-contact with each other; the bearings in the front bearing cavity and the bearings in the rear bearing cavity are lubricated by lubricating oil, and the bearing cavities and the compression cavities are sealed by sealing bodies; water is sprayed into the compression cavity, gaps among the rotors and between the rotors and the shell are sealed, and meanwhile compressed gas is cooled to take away heat generated in the process of pressure rise.
The water sprayed into the compression cavity of the middle water-spraying oil-free screw compressor can be purified water or special formula water with certain viscosity for mixed additives. Adopt the utility model provides a water spray oil-free screw compressor, single-stage compression's internal pressure ratio can be greater than 3.5, keeps exhaust temperature no longer than 200 ℃ simultaneously.
The utility model provides a water spray oil-free screw compressor can adopt double screw or three screw rod compression structure, the screw rod leans on synchronous gear or motor drive, keep certain clearance contactless between the screw rod, adopt the lubricated antifriction bearing of oil in the bearing cavity of screw rod front end and rear end, adopt sealing system to keep apart between bearing cavity and the compression chamber, ensure that bearing lubricating oil does not get into compression chamber and pollute compressed gas, spout clean water toward the compression intracavity during operation, cool off compressed gas, seal screw rotor and casing clearance, control water spray volume and internal pressure ratio design, ensure exhaust temperature between 100 ℃ -200 ℃. The internal pressure ratio of the compressor can be improved to more than 3.5 due to the water spraying and cooling in the compression cavity; the sprayed water can seal gaps among parts of the compression cavity, so that the internal leakage of the compressor is reduced, and the compression energy efficiency can be effectively improved; in addition, because the exhaust temperature can be controlled to be more than 100 ℃ but not too high, microorganisms can be effectively killed while the exhaust temperature is prevented from being too high.
Drawings
In order to more clearly illustrate the embodiments and/or prior art solutions of the present invention, the drawings used in the description of the embodiments and/or prior art will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive work.
Fig. 1 is the structure schematic diagram of the water spray oil-free screw compressor in the embodiment of the present invention.
In the figure: 1-meshing rotor pair, 2-shell, 3-end cover, 4-driving mechanism, 5-front bearing cavity, 6-rear bearing cavity, 7-front sealing body, 8-rear sealing body and 9-compression cavity.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1, the water-injection oil-free screw compressor of the present embodiment includes a meshing rotor pair 1, a casing 2, an end cover 3, a drive mechanism 4 for driving the meshing rotor pair 1 to rotate, a front seal body 7 for preventing lubricating oil in a front bearing chamber 5 from being sucked into a compression chamber 9, and a rear seal body 8 for preventing lubricating oil in a rear bearing chamber 6 from being sucked into the compression chamber 9.
The inside of casing 2 in this embodiment has set gradually front bearing chamber 5, compression chamber 9 and rear bearing chamber 6 from the past backward, and the front end of meshing rotor pair 1 passes through the bearing and rotates to be connected in front bearing chamber 5, and the rear end of this meshing rotor pair 1 passes through the bearing and rotates to be connected in rear bearing chamber 6, and actuating mechanism 4 is connected with meshing rotor pair 1, and end cover 3 is fixed with casing 2. The shell 2 is provided with a water inlet structure for injecting or spraying water into the compression cavity 9, the front sealing body 7 is fixed between the front bearing cavity 5 and the compression cavity 9 and used for isolating the front bearing cavity 5 from the compression cavity 9, and the rear sealing body 8 is fixed between the rear bearing cavity 6 and the compression cavity 9 and used for isolating the rear bearing cavity 6 from the compression cavity 9.
The number of rotors in the meshing rotor pair 1 in the embodiment can be 2 or 3, and a gap exists between adjacent rotors; the driving mechanism 4 can be a synchronous gear, a synchronous motor or a servo motor, and the driving position can be positioned on the air inlet side or the air exhaust side; the water-injection oil-free screw compressor may be a single-stage compressor or a multi-stage compressor.
The meshing rotor pair 1 in this embodiment runs in the compression chamber 9 and the rotors are driven by a drive mechanism 4, wherein the drive mechanism 4 can be a synchronous gear or a separately driven drive motor. The meshing rotor pair 1 sucks and compresses gas during the rotation to form pressurized gas. The meshed rotor pair 1 is driven by a driving mechanism 4 to rotate, and certain gaps are kept between the rotors and are not contacted with each other at any time.
The meshing rotor pair 1 in this embodiment has bearing supports at the front end and the rear end, respectively, to receive radial force and axial force generated during operation. The front bearing cavity 5 and the rear bearing cavity 6 are spaces for mounting bearings, wherein lubricating oil is brought into the front bearing cavity 5 and the rear bearing cavity 6 in a mode of oil injection or oil throwing and the like for lubricating the bearings.
Between the compression chamber 9 and the front bearing chamber 5 in this embodiment, a front seal body 7 is installed to prevent the lubricating oil in the front bearing chamber 5 from being sucked into the compression chamber 9 and to engage the rotor pair 1. In the present embodiment, a rear seal body 8 is provided between the compression chamber 9 and the rear bearing chamber 6 to prevent the lubricating oil in the rear bearing chamber 6 from being sucked into the compression chamber 9 and to the meshing rotor pair 1.
During operation, water can be injected into the compression cavity 9 through a certain structure and a certain system, the compression cavity is used for sealing between the meshing rotor pairs 1 and the shell 2, and the compression cavity is used for cooling compressed gas, so that the compressed gas is cooled, and heat generated in the pressure rising process is taken away.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (4)
1. A water-spraying oil-free screw compressor comprises a meshing rotor pair (1), a shell (2), an end cover (3) and a driving mechanism (4) used for driving the meshing rotor pair (1) to rotate, wherein a front bearing cavity (5), a compression cavity (9) and a rear bearing cavity (6) are sequentially arranged in the shell (2) from front to back, the front end of the meshing rotor pair (1) is rotatably connected in the front bearing cavity (5) through a bearing, the rear end of the meshing rotor pair (1) is rotatably connected in the rear bearing cavity (6) through a bearing, the driving mechanism (4) is connected with the meshing rotor pair (1), and the end cover (3) is fixed with the shell (2); the method is characterized in that: the lubricating oil pump also comprises a front sealing body (7) for preventing lubricating oil in the front bearing cavity (5) from being sucked into the compression cavity (9), and a rear sealing body (8) for preventing lubricating oil in the rear bearing cavity (6) from being sucked into the compression cavity (9); casing (2) are provided with and are used for injecting into or spout into the water inlet structure of water in compression chamber (9), preceding seal (7) are fixed between preceding bearing housing (5) and compression chamber (9) and are used for keeping apart preceding bearing housing (5) and compression chamber (9), back seal (8) are fixed between back bearing housing (6) and compression chamber (9) and are used for keeping apart back bearing housing (6) and compression chamber (9).
2. A water-jet oil-free screw compressor as claimed in claim 1, wherein: the number of the rotors in the meshed rotor pair (1) is 2 or 3, and a gap exists between every two adjacent rotors.
3. A water-jet oil-free screw compressor as claimed in claim 1, wherein: the driving mechanism (4) is a synchronous gear, a synchronous motor or a servo motor, and the driving position is positioned on the air inlet side or the air exhaust side.
4. A water-jet oil-free screw compressor as claimed in claim 1, wherein: the water spray oil-free screw compressor is a single-stage compressor or a multi-stage compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920330656.8U CN209761716U (en) | 2019-03-15 | 2019-03-15 | Water-spraying oil-free screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920330656.8U CN209761716U (en) | 2019-03-15 | 2019-03-15 | Water-spraying oil-free screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209761716U true CN209761716U (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920330656.8U Active CN209761716U (en) | 2019-03-15 | 2019-03-15 | Water-spraying oil-free screw compressor |
Country Status (1)
| Country | Link |
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| CN (1) | CN209761716U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115559902A (en) * | 2021-12-29 | 2023-01-03 | 宁波鲍斯能源装备股份有限公司 | Screw rod structure capable of being sprayed with water and compressor |
| WO2024230320A1 (en) * | 2023-05-10 | 2024-11-14 | 上海汉钟精机股份有限公司 | Steam screw compressor with non-contact sealing structure |
-
2019
- 2019-03-15 CN CN201920330656.8U patent/CN209761716U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115559902A (en) * | 2021-12-29 | 2023-01-03 | 宁波鲍斯能源装备股份有限公司 | Screw rod structure capable of being sprayed with water and compressor |
| WO2024230320A1 (en) * | 2023-05-10 | 2024-11-14 | 上海汉钟精机股份有限公司 | Steam screw compressor with non-contact sealing structure |
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