CN105626530A - Water-lubrication oil-free medium pressure two-stage-compression single-screw-rod air compressor - Google Patents
Water-lubrication oil-free medium pressure two-stage-compression single-screw-rod air compressor Download PDFInfo
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- CN105626530A CN105626530A CN201610152773.0A CN201610152773A CN105626530A CN 105626530 A CN105626530 A CN 105626530A CN 201610152773 A CN201610152773 A CN 201610152773A CN 105626530 A CN105626530 A CN 105626530A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/10—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member
- F04C18/107—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth equivalents, e.g. rollers, than the inner member with helical teeth
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/026—Lubricant separation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressor (AREA)
Abstract
The invention relates to a water-lubrication oil-free medium pressure two-stage-compression single-screw-rod air compressor. The air compressor comprises an electric motor, a first-stage single-screw-rod compression main machine, a second-stage single-screw-rod compression main machine, an air filter, a first-stage water and gas separator, a second-stage water and gas separator, a first-stage gas cooler, a second-stage gas cooler and an electrical control box; the first-stage single-screw-rod compression main machine and the second-stage single-screw-rod compression main machine are in transmission connection with the electric motor, and the air filter is connected with a gas inlet of the first-stage single-screw-rod compression main body; and the first-stage gas cooler is connected with the first-stage water and gas separator, the second-stage gas cooler is connected with the second-stage water and gas separator, and the electrical control box is electrically connected with the electric motor. Compared with the prior art, the water-lubrication oil-free medium pressure two-stage-compression single-screw-rod air compressor has the beneficial effects that the whole structure is simple and compact, complex pipelines and valves do not need to be additionally arranged, water lubrication is adopted, resistance losses are small, running reliability is good, volume efficiency is high, oil is avoided, zero emissions are achieved, no environmental pollution exists, running is carried out at the normal temperature, and the air compressor is environment-friendly, energy-saving and low in maintaining cost and has the very good application prospect.
Description
Technical field
The invention belongs to field of mechanical technique, it relates to a kind of air compressor, especially relate to a kind of water lubricating without oil is pressed two stages of compression single-screw air compressor.
Background technology
Now, for meeting need pressing (3-5MPa) gas source in bottle blowing, medical industry etc. and war industry, all employing reciprocating compressor or screw rod are connected with piston compressor unit. Wherein, reciprocating compressor mainly contains symmetrical balance-type intermediate pressure compressor, and level Four is compressed, and its exhaust pressure reaches (3-5MPa) and V-type intermediate pressure compressor, and level Four is compressed, and its exhaust pressure reaches (3-5MPa). But, above-mentioned two kinds of type inter-stages are provided with snubber, water cooler, separator (oil, gas, water are separated), are namely equipped with three kinds of containers after I-II grade, II-III grade, III-IV grade and IV grade, and pipeline is complicated, type is huge, and maintenance difficulty is big.
For reciprocating compressor Problems existing, adopting screw rod to connect with piston compressor unit, spiral-lobe compressor one stage of compression, its exhaust pressure reaches (0.7-1.2MPa); Piston compressor carries out one-level or two grades of compressions again, and its exhaust pressure reaches (3-5MPa). From said structure: for reaching operating pressure (3-5MPa), said structure all have employed more than two grades compression schemes, and for meeting air source quality requirement, the anticorrosion materials of material selection such as cylinder, air valve, piston rod and pipeline, piston ring, filler all adopt polytetrafluoroethylmaterial material. But still there is following problem in said structure: 1) said structure cylinder is water-free lubrication, but crankcase is interior and pinblock slideway all has oil lubrication, therefore piston rod has oil, machine is when moving reciprocatingly, oil can swash from piston rod and be advanced into cylinder, for control air source quality (oil) index must arrange multiple (one or more groups) oil strainer at exhaust outlet of compressor; 2) structure is heavy, and pipeline is crisscross numerous and diverse, and in system, all kinds of valve is many, Controlling System cumbersome (reference mark is many); 3) complete machine consumable accessory is many, operation factor is low, and noise is big, vibration earthquake intensity height, and under identical free air delivery, power consumption is many, and maintenance of equipment is difficult, and the cycle is long, and floor space is big.
At present, along with the development in Compressor Technology field, spiral-lobe compressor is as the regeneration product of reciprocating piston compressor, and replacing reciprocating compressor with screw rod is power compressor development trend. Spiral-lobe compressor has double-screw compressor and single screw compressor two kinds. Wherein, originally single screw compressor is mainly used as injected compressor, and after technology is really ripe, its range of application just expands day by day. Though single screw compressor is than the double-screw compressor late many decades of appearance, but ascendant trend is powerful because of excellent performance. Due to the stress balance of singe screw, the comparable twin screw of the top pressure of one stage of compression is big; Singe screw is more energy-conservation than twin screw, and bearing size is not restricted as double-screw type and the life-span is longer. When reality uses, compressor high speed operation process is known from experience by compressed gas and produces a large amount of heat energy, must oil spout or spray other liquid (water, liquid refrigerant etc.) and cool. And present stage single screw compressor major part or adopt oil lubrication technology. Such as, application number be 201310312217.1 Chinese patent disclose a kind of two stages of compression single-screw air compressor and method of work thereof, this two stages of compression single-screw air compressor, comprise electric motor, air filter, one-level gas-oil separation bucket, two grades of gas-oil separation buckets and the one stage of compression main frame being serially connected without shaft seal and two grades of compression main frames, also it is provided with one two grades main frame repairing pipes between described one-level gas-oil separation bucket and the inlet mouth of two grades of compression main frames, described two grades of main frame repairing pipes are provided with Fill valve. The technical scheme of above-mentioned patent disclosure is mainly by being arranged on repairing pipe and the Fill valve of one-level gas-oil separation bucket and two grades of compression main frames, compressor oil too much in one stage of compression main frame can be fed back to two grades of compression main frames, ensure the normal operation of this air compressor. But, above-mentioned patent disclosure be oil lubrication single screw compressor, air feed oleaginousness 5ppm, do not reach the application requirement in the fields such as medical treatment, medicine, food, and control gas source oil content, it is necessary to adopting complete oilless air compressor, water lubricating list screw bar compression function meets requirement. Generally speaking, medicine equipment and pharmaceutical industries require that pressurized air air feed oleaginousness must not more than 0.03ppm, AA level ultra-high efficiency oil removal filter must be set in addition, reaching minimum residual oil content content is 0.001ppm, to guarantee that medical apparatus is not contaminated, avoid the impact on patient body health simultaneously; And oil lubrication air compressor machine can not ensure in air demand not oil-containing, its oleaginousness reaches 5ppm, it may also be useful to up to 10ppm, can understand like this and seriously affect the healthy of patient, even cause malpractice after 3 to April.
Summary of the invention
The object of the present invention is exactly the defect in order to overcome the existence of above-mentioned prior art and provides a kind of structure simple, adopting water lubricating, drag losses is little, cooling efficiency height, effectively reducing unit consumed power, water lubricating safe and reliable to operation is without pressing two stages of compression single-screw air compressor in oil.
The object of the present invention can be achieved through the following technical solutions:
A kind of water lubricating without oil is pressed two stages of compression single-screw air compressor, two grades of gas water coolers that the one-level gas water cooler that air filter that the one-level singe screw compression main frame that comprise electric motor, is connected respectively with motor drive driving motion and two grades of singe screw compression main frames are connected with the inlet mouth of one-level singe screw compression main frame, one-level moisture separator, second level moisture separator are connected with one-level moisture separator is connected with second level moisture separator and the electric control box being connected with electric electromechanics;
Wherein, the venting port that described one-level moisture separator compresses main frame with one-level singe screw is connected, the mouth spray that the water outlet of described one-level moisture separator compresses main frame by one-level water filter and one-level singe screw is connected, and the air outlet of described one-level moisture separator is connected with the inlet mouth of one-level gas water cooler;
The inlet mouth of two grades of described singe screw compression main frames is connected with the air outlet of one-level gas water cooler, described second level moisture separator is connected with the venting port of two grades of singe screw compression main frames, the mouth spray that the water outlet of described second level moisture separator compresses main frames by two-stage water filtering device and two grades of singe screw is connected, the air outlet of described second level moisture separator be connected with for by air cooling and export two grades of gas water coolers.
Described air compressor also comprises the water softener compressing the mouth spray of main frame and being connected with one-level singe screw.
The mouth spray of described one-level singe screw compression main frame and the mouth spray of two grades of singe screw compression main frames are respectively equipped with atomizing spray device.
The front axle that the screw shaft of described one-level singe screw compression main frame connects cylinder and electric motor by one-level is in transmission connection, and the screw shaft of two grades of described singe screw compression main frames is connected with the backshaft drive of electric motor by two grades of shaft couplings.
Being provided with butterfly valve between the inlet mouth of described one-level singe screw compression main frame and air filter, this butterfly valve is connected by the water outlet of one-level water filter with one-level moisture separator.
Described one-level moisture separator is also provided with one-level minimum pressure valve and first class pressure sensor, described second level moisture separator is also provided with two grades of minimum pressure valves and secondary pressure sensor.
Described one-level minimum pressure valve is mainly used in setting up pressure in two-stage singe screw compression main frame, impels the circulation of two grades of singe screw compression main frame lubrication water, two grades of minimum pressure valves mainly play one-way exhaust, prevent the lubrication aqueous reflux isolated in second level moisture separator in second level moisture separator and two grades of singe screw compression main frames.
The venting port of described one-level singe screw compression main frame is connected with one-level moisture separator by one-level check valve, and the venting port of two grades of described singe screw compression main frames is connected with second level moisture separator by two-stage unidirectional valve.
Described one-level moisture separator and second level moisture separator are respectively equipped with one-level safety valve, two level security valves. When the air pressure in moisture separator exceedes set(ting)value, corresponding safety valve is opened automatically, puts part air, thus reduces the air pressure in moisture separator, ensures the security that moisture separator uses.
Under in working order, described one-level singe screw compression main frame is by air filter input air, air is compressed after main frame compresses through one-level singe screw and is mixed with the lubrication water spurted into by one-level singe screw compression main frame mouth spray, form air-water mixture, this air-water mixture compresses the venting port of main frame through one-level singe screw, one-level check valve enters and carries out an aqueous vapor separation in one-level moisture separator, lubrication water after flash liberation is back in one-level singe screw compression main frame through one-level water filter, pressurized air after flash liberation is after one-level gas water cooler cools, enter in two grades of singe screw compression main frames again, and mix with the lubrication water in two grades of singe screw compression main frames, again form air-water mixture, this air-water mixture is through the venting port of two grades of singe screw compression main frames, two-stage unidirectional valve enters and carries out two aqueous vapor separation in second level moisture separator, lubrication water after secondary separation is back in two grades of singe screw compression main frames through two-stage water filtering device, pressurized air after secondary separation outwardly exports after two grades of gas water coolers cool.
Two stages of compression single-screw air compressor of the present invention is also provided with lubrication water control system for automatic compensation, the float switch comprising water softener, the first water-supply pipe being connected with one-level moisture separator, second level moisture separator by water softener and the 2nd water-supply pipe and being arranged in one-level moisture separator and second level moisture separator.
Being provided with electromagnetism water compensating valve respectively on the first described water-supply pipe and the 2nd water-supply pipe, this electromagnetism water compensating valve is electrically connected with electric control box by circuit.
Described one-level moisture separator and the bottom of second level moisture separator are provided with electromagnetism water escape valve respectively, and this electromagnetism water escape valve is electrically connected with electric control box by circuit.
The working process of described lubrication water control system for automatic compensation is (for one-level moisture separator): the water level of the lubrication water in one-level moisture separator is controlled by float switch, when the water level lubricating water exceedes the top water-level value of one-level moisture separator, water level signal is passed to electric control box by float switch, electric control box is opened according to the water level signal control electromagnetism water escape valve received, in time lubrication water unnecessary in one-level moisture separator is discharged, until the water level of lubrication water is lower than set maximum; And when the water level lubricating water is lower than the minimum water level value of one-level moisture separator, water level signal is passed to electric control box by float switch, electric control box is closed according to the water level signal control electromagnetism water escape valve received, simultaneously, automatically electromagnetism water compensating valve is opened, in one-level moisture separator, lubrication water is fed so that the water lev el control of the lubrication water in one-level moisture separator, within set(ting)value, ensures the normal operation of one-level moisture separator by water softener.
In the present invention, the Meshing Pair that described one-level singe screw compression main frame and two grades of singe screw compression main frames are all made up of the planar gaterotors of a cylindrical screw rod and two balanced configurations is contained in main frame shell. The space that the flank of tooth three of the spiral shell groove of screw rod, the inwall of main frame shell, star-wheel surrounds constitutes the working volume of air compressor. The front axle of electric motor, rear axle directly drive the bolt rotary of one-level singe screw compression main frame, two grades of singe screw compression main frames respectively, and then realize one stage of compression, two grades of whole compression process.
One-level singe screw of the present invention compression main frame, two grades of singe screw compression main frames and electric motor are complete machine structure, the dismountable outer case of outer setting, the interior sponge with environmental protection sound insulation, not only noise reduction but also convenient cleaning; Meanwhile, adopt full containing ceramic slide bearing structure, and make bearing be in compressor low-tension side, ensure the safety and reliability run.
Pressure of the present invention improves employing two grades of compressions (i.e. one-level singe screw compression main frame and two grades of singe screw compression main frames), adopt screw rod and star gear body that size is different, realize rational pressure distribution, reduce the pressure ratio of every grade, low pressure ratio can reduce internal leakage, it is to increase volumetric efficiency, makes shaft strength little, and evenly improve bearing life, and then extend one-level singe screw compression main frame and the work-ing life of two grades of singe screw compression main frames.
Two stages of compression single-screw air compressor one-level normal pressure air-breathing of the present invention, is compressed to (0.7-1.2) MPa; Enter two grades of compressions thereupon, it is compressed to (3-5) MPa, every grade of inlet mouth place all strengthens spray cooling fluid and reduces inlet air temperature, it is beneficial to power reduction, every grade of venting port peripheral hardware moisture separator, the isothermal compression being tending towards economizing most merit because of two stages of compression, two stages of compression economizes merit 6-10% than single-stage compression theoretically.
Lubricant of the present invention is water, it is necessary to reach water quality requirement. Tap water also can reach water quality requirement through softening agent process, otherwise can use mineral water and distilled water. Lubricant is water, because gas, water easily process, can meet the requirement of air source quality.
The present invention is when carrying out the structure design of one-level singe screw compression main frame and two grades of singe screw compression main frames, adopt a kind of theory shaped wire, namely in three-dimensional coordinate system, set up the model of screw rod and star-wheel, with the three-dimensional model of screw rod in engagement process is projected in the three-dimensional model of star-wheel, find out all borders point of contact of the star-wheel flank of tooth, form the star-wheel flank of tooth with these point of contact. Adopt the star-wheel flank of tooth formed in this way and it is called theoretical profile (i.e. curved surface envelope profile), because this profile does not exist not point of contact in theory. The star-wheel flank of tooth a little all have an opportunity participate in screw rod engagement. After adopting theoretical profile, there is not rib limit in star-wheel tooth side, its water film supporting capacity will improve greatly.
After adopting curved surface envelope profile, Control curve parameter can be passed through, realize long and narrow, the flattening in envelope region, thus increase lubrication area, guarantee between star-wheel tooth and teeth groove face, to form round and smooth water film, and ensure that radial leakage passage maintains very low level, it is achieved two guarantees of single screw compressor efficiency, reliability.
Compared with prior art, the present invention has following feature:
1) adopt two grades of compressions, adopt screw rod and star gear body that size is different, it is achieved reasonably pressure distribution, reducing the pressure ratio of every grade, low pressure ratio can reduce internal leakage, it is to increase volumetric efficiency, make shaft strength little, and evenly improve bearing life, and then extend main frame work-ing life;
2) lubrication adopts water lubricating, decreases environmental pollution, reaches environmental requirement, is applicable to medical, food and pneumatic Instrument use;
3) adopting two grades of compressions, final pressure reaches 3-5MPa (medium pressure grade), and two stages of compression economizes merit 6-10% than single-stage compression, is applicable to the industry such as bottle blowing, ship ship;
4) air circulation is unimpeded, and cold and hot room is separated, complete machine good heat dissipation effect, extends complete machine work-ing life;
5) owing to adopting atomizing spray device, lubricating uniform, cooling efficiency height, unit consumed power is reduced;
6) minimum pressure valve is set at moisture separator top, can effectively prevent pressure leakage, set up pressure in unit, it is possible to effectively prevent the refluence of pressurized air, and ensure the normal operation of the water lubricating recycle system, extend work-ing life;
7) one-piece construction is simple, compact, it is not necessary to additionally arrange crisscross numerous and diverse pipeline and valve, adopts water lubricating, and drag losses is little, serviceability is good, volumetric efficiency height, without oil zero release, and non-environmental-pollution, running at normal temperature, environmental protection and energy saving, maintenance cost is low, has good application prospect.
Accompanying drawing explanation
Fig. 1 is perspective view of the present invention;
Fig. 2 is electric motor of the present invention and the assembly connection structural representation of one-level singe screw compression main frame and two grades of singe screw compression main frames;
Description of symbols in figure:
1 electric motor, 2 one-level singe screw compression main frames, 3 two grades of singe screw compression main frames, 4 air filters, 5 one-level moisture separators, 6 second level moisture separators, 7 one-level gas water coolers, 8 two grades of gas water coolers, 9 electric control boxes, 10 water softeners, 11 one-levels connect cylinder, 12 2 grades of shaft couplings, 13 butterfly valves, 14 one-level check valves, 15 two-stage unidirectional valves, 16 2 level security valves, 17 one-level minimum pressure valves, 18 first class pressure sensors, 19 2 grades of minimum pressure valves, 20 secondary pressure sensors, 21 one-level water filters, 22 two-stage water filtering devices.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment:
As shown in Figure 1-2, a kind of water lubricating without oil is pressed two stages of compression single-screw air compressor, two grades of gas water coolers 8 that the one-level gas water cooler 7 that the one-level singe screw compression main frame 2 that comprise electric motor 1, is in transmission connection respectively with electric motor 1 and two grades of singe screw compression main frames 3 compress air filter that the inlet mouth of main frame 2 is connected with one-level singe screw, one-level moisture separator 5, second level moisture separator 6 are connected with one-level moisture separator 5 is connected with second level moisture separator 6 and the electric control box 9 being electrically connected with electric motor 1; Wherein, the venting port that one-level moisture separator 5 compresses main frame 2 with one-level singe screw is connected, the mouth spray that the water outlet of one-level moisture separator 5 compresses main frame 2 by one-level water filter 21 and one-level singe screw is connected, and the air outlet of one-level moisture separator 5 is connected with the inlet mouth of one-level gas water cooler 7; The inlet mouth of two grades of singe screw compression main frames 3 is connected with the air outlet of one-level gas water cooler 7, second level moisture separator 6 is connected with the venting port of two grades of singe screw compression main frames 3, the mouth spray that the water outlet of second level moisture separator 6 compresses main frames 3 by two-stage water filtering device 22 and two grades of singe screw is connected, the air outlet of second level moisture separator 6 be connected with for by air cooling and export two grades of gas water coolers 8.
Air compressor also comprises the water softener 10 compressing the mouth spray of main frame 2 and being connected with one-level singe screw.
The mouth spray of one-level singe screw compression main frame 2 and the mouth spray of two grades of singe screw compression main frames 3 are respectively equipped with atomizing spray device.
The front axle that the screw shaft of one-level singe screw compression main frame 2 connects cylinder 11 and electric motor 1 by one-level is in transmission connection, and the screw shaft of two grades of singe screw compression main frames 3 is connected with the backshaft drive of electric motor 1 by two grades of shaft couplings 12.
Being provided with butterfly valve 13 between the inlet mouth of one-level singe screw compression main frame 2 and air filter, this butterfly valve 13 is connected by the water outlet of one-level water filter 21 with one-level moisture separator 5.
The venting port of one-level singe screw compression main frame 2 is connected with one-level moisture separator 5 by one-level check valve 14, and the venting port of two grades of singe screw compression main frames 3 is connected with second level moisture separator 6 by two-stage unidirectional valve 15.
One-level moisture separator 5 is also provided with one-level minimum pressure valve 17 and first class pressure sensor 18, second level moisture separator 6 is also provided with two grades of minimum pressure valves 19 and secondary pressure sensor 20. Wherein, one-level minimum pressure valve 17 is mainly used in setting up pressure in two-stage singe screw compression main frame, impels the circulation of two grades of singe screw compression main frame lubrication water, two grades of minimum pressure valves 19 mainly play one-way exhaust, prevent the lubrication aqueous reflux isolated in second level moisture separator 6 in second level moisture separator 6 and two grades of singe screw compression main frames 3.
One-level moisture separator 5 and second level moisture separator 6 are respectively equipped with one-level safety valve, two level security valves 16. When the air pressure in moisture separator exceedes set(ting)value, corresponding safety valve is opened automatically, puts part air, thus reduces the air pressure in moisture separator, ensures the security that moisture separator uses.
Under in working order, one-level singe screw compression main frame 2 is by air filter 4 input air, air is compressed after main frame 2 compresses through one-level singe screw and is mixed with the lubrication water spurted into by one-level singe screw compression main frame 2 mouth spray, form air-water mixture, this air-water mixture compresses the venting port of main frame 2 through one-level singe screw, one-level check valve 14 enters and carries out an aqueous vapor separation in one-level moisture separator 5, lubrication water after flash liberation is back in one-level singe screw compression main frame 2 through one-level water filter 21, pressurized air after flash liberation is after one-level gas water cooler 7 cools, enter in two grades of singe screw compression main frames 3 again, and mix with the lubrication water in two grades of singe screw compression main frames 3, again form air-water mixture, this air-water mixture is through the venting port of two grades of singe screw compression main frames 3, two-stage unidirectional valve 15 enters and carries out two aqueous vapor separation in second level moisture separator 6, lubrication water after secondary separation is back in two grades of singe screw compression main frames 3 through two-stage water filtering device 22, pressurized air after secondary separation outwardly exports after two grades of gas water coolers 8 cool.
The present embodiment two stages of compression single-screw air compressor is also provided with lubrication water control system for automatic compensation, the float switch comprising water softener 10, the first water-supply pipe being connected with one-level moisture separator 5, second level moisture separator 6 by water softener 10 and the 2nd water-supply pipe and being arranged in one-level moisture separator 5 and second level moisture separator 6. Being provided with electromagnetism water compensating valve respectively on first water-supply pipe and the 2nd water-supply pipe, this electromagnetism water compensating valve is electrically connected with electric control box by circuit.
The bottom of one-level moisture separator 5 and second level moisture separator 6 is provided with electromagnetism water escape valve respectively, and this electromagnetism water escape valve is electrically connected with electric control box 9 by circuit.
The working process of lubrication water control system for automatic compensation is (for one-level moisture separator 5): the water level of the lubrication water in one-level moisture separator 5 is controlled by float switch, when the water level lubricating water exceedes the top water-level value of one-level moisture separator 5, water level signal is passed to electric control box 9 by float switch, electric control box 9 is opened according to the water level signal control electromagnetism water escape valve received, in time lubrication water unnecessary in one-level moisture separator 5 is discharged, until the water level of lubrication water is lower than set maximum; And when the water level lubricating water is lower than the minimum water level value of one-level moisture separator 5, water level signal is passed to electric control box 9 by float switch, electric control box 9 is closed according to the water level signal control electromagnetism water escape valve received, simultaneously, automatically electromagnetism water compensating valve is opened, in one-level moisture separator 9, lubrication water is fed so that the water lev el control of the lubrication water in one-level moisture separator 9, within set(ting)value, ensures the normal operation of one-level moisture separator 9 by water softener 10.
In the present invention, the Meshing Pair that one-level singe screw compression main frame and two grades of singe screw compression main frame are all made up of the planar gaterotors of a cylindrical screw rod and two balanced configurations is contained in main frame shell. The space that the flank of tooth three of the spiral shell groove of screw rod, the inwall of main frame shell, star-wheel surrounds constitutes the working volume of air compressor. The front axle of electric motor, rear axle directly drive the bolt rotary of one-level singe screw compression main frame, two grades of singe screw compression main frames respectively, and then realize one stage of compression, two grades of whole compression process.
In the present embodiment, one-level singe screw compression main frame 2, two grades of singe screw compression main frames 3 and electric motor 1 are complete machine structure, the dismountable outer case of outer setting, the interior sponge with environmental protection sound insulation, not only noise reduction but also convenient cleaning; Meanwhile, adopt full containing ceramic slide bearing structure, and make bearing be in compressor low-tension side, ensure the safety and reliability run. The present embodiment two stages of compression single-screw air compressor one-level normal pressure air-breathing, is compressed to (0.7-1.2) MPa; Enter two grades of compressions thereupon, it is compressed to (3-5) MPa, every grade of inlet mouth place all strengthens spray cooling fluid and reduces inlet air temperature, it is beneficial to power reduction, every grade of venting port peripheral hardware moisture separator, the isothermal compression being tending towards economizing most merit because of two stages of compression, two stages of compression economizes merit 6-10% than single-stage compression theoretically.
The above-mentioned description to embodiment can understand and use invention for ease of those skilled in the art. These embodiments obviously easily can be made various amendment by person skilled in the art, and General Principle described herein are applied in other embodiments and need not pass through creative work. Therefore, the invention is not restricted to above-described embodiment, those skilled in the art, according to the announcement of the present invention, do not depart from improvement that category of the present invention makes and amendment all should within protection scope of the present invention.
Claims (9)
1. a water lubricating is without pressing two stages of compression single-screw air compressor in oil, it is characterized in that, comprise electric motor (1), one-level singe screw compression main frame (2) being in transmission connection with electric motor (1) respectively and two grades of singe screw compression main frame (3), the air filter that the inlet mouth of main frame (2) is connected is compressed with one-level singe screw, one-level moisture separator (5), second level moisture separator (6), one-level gas water cooler (7) being connected with one-level moisture separator (5), the two grades of gas water coolers (8) being connected with second level moisture separator (6) and the electric control box (9) being electrically connected with electric motor (1),
Wherein, the venting port that described one-level moisture separator (5) compresses main frame (2) with one-level singe screw is connected, the mouth spray that the water outlet of described one-level moisture separator (5) compresses main frame (2) by one-level water filter (21) and one-level singe screw is connected, and the air outlet of described one-level moisture separator (5) is connected with the inlet mouth of one-level gas water cooler (7);
The inlet mouth of two grades of described singe screw compression main frame (3) is connected with the air outlet of one-level gas water cooler (7), described second level moisture separator (6) is connected with the venting port of two grades of singe screw compression main frame (3), the mouth spray that the water outlet of described second level moisture separator (6) compresses main frame (3) by two-stage water filtering device (22) and two grades of singe screw is connected, the air outlet of described second level moisture separator (6) be connected with for by air cooling and export two grades of gas water coolers (8).
2. a kind of water lubricating according to claim 1 is without pressing two stages of compression single-screw air compressor in oil, it is characterized in that, described air compressor also comprises the water softener (10) compressing the mouth spray of main frame (2) and being connected with one-level singe screw.
3. a kind of water lubricating according to claim 2 is without pressing two stages of compression single-screw air compressor in oil, it is characterized in that, the mouth spray of described one-level singe screw compression main frame (2) and the mouth spray of two grades of singe screw compression main frame (3) are respectively equipped with atomizing spray device.
4. a kind of water lubricating according to claim 2 is without pressing two stages of compression single-screw air compressor in oil, it is characterized in that, the front axle that the screw shaft of described one-level singe screw compression main frame (2) connects cylinder (11) and electric motor (1) by one-level is in transmission connection, and the screw shaft of two grades of described singe screw compression main frame (3) is connected with the backshaft drive of electric motor (1) by two grades of shaft couplings (12).
5. a kind of water lubricating according to claim 2 is without pressing two stages of compression single-screw air compressor in oil, it is characterized in that, being provided with butterfly valve (13) between the inlet mouth of described one-level singe screw compression main frame (2) and air filter, this butterfly valve (13) is connected by the water outlet of one-level water filter (21) with one-level moisture separator (5).
6. a kind of water lubricating according to claim 2 is without pressing two stages of compression single-screw air compressor in oil, it is characterized in that, the venting port of described one-level singe screw compression main frame (2) is connected with one-level moisture separator (5) by one-level check valve (14), and the venting port of two grades of described singe screw compression main frame (3) is connected with second level moisture separator (6) by two-stage unidirectional valve (15).
7. a kind of water lubricating according to claim 2 is without pressing two stages of compression single-screw air compressor in oil, it is characterized in that, described one-level moisture separator (5) is also provided with one-level minimum pressure valve (17) and first class pressure sensor (18), described second level moisture separator (6) is also provided with two grades of minimum pressure valves (19) and secondary pressure sensor (20).
8. a kind of water lubricating according to claim 7 is without pressing two stages of compression single-screw air compressor in oil, it is characterized in that, described one-level moisture separator (5) and second level moisture separator (6) are respectively equipped with one-level safety valve, two level security valves (16).
9. a kind of water lubricating according to the arbitrary item of claim 1 to 7 is without pressing two stages of compression single-screw air compressor in oil, it is characterized in that, under in working order, described one-level singe screw compression main frame (2) is by air filter (4) input air, air is compressed after main frame (2) compresses through one-level singe screw and mixes with the lubrication water spurted into by one-level singe screw compression main frame (2) mouth spray, form air-water mixture, this air-water mixture compresses the venting port of main frame (2) through one-level singe screw, one-level check valve (14) enters and carries out an aqueous vapor separation in one-level moisture separator (5), lubrication water after flash liberation is back in one-level singe screw compression main frame (2) through one-level water filter (21), pressurized air after flash liberation is after one-level gas water cooler (7) cools, enter in two grades of singe screw compression main frame (3) again, and mix with the lubrication water in two grades of singe screw compression main frame (3), again form air-water mixture, this air-water mixture is through the venting port of two grades of singe screw compression main frame (3), two-stage unidirectional valve (15) enters and carries out two aqueous vapor separation in second level moisture separator (6), lubrication water after secondary separation is back in two grades of singe screw compression main frame (3) through two-stage water filtering device (22), pressurized air after secondary separation outwardly exports after two grades of gas water coolers (8) cool.
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| CN107701442A (en) * | 2017-10-29 | 2018-02-16 | 上海齐耀膨胀机有限公司 | Screw type water steam compression system |
| CN107740768A (en) * | 2017-11-08 | 2018-02-27 | 好米动力设备有限公司 | A kind of T types structure single screw compressor |
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| CN112879271A (en) * | 2021-01-22 | 2021-06-01 | 深圳市英威腾电气股份有限公司 | Control method of water lubrication process and air compressor |
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| CN112012930A (en) * | 2020-09-11 | 2020-12-01 | 湖州拓锐机械有限公司 | Water lubrication single-screw air compressor |
| CN112879271A (en) * | 2021-01-22 | 2021-06-01 | 深圳市英威腾电气股份有限公司 | Control method of water lubrication process and air compressor |
| CN112943612A (en) * | 2021-03-26 | 2021-06-11 | 无锡索贝克精密机械有限公司 | High-pressure energy-saving multistage screw air compressor |
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