CN117780592A - Oil-free lubrication reciprocating piston type gas compressor and automatic control system thereof - Google Patents
Oil-free lubrication reciprocating piston type gas compressor and automatic control system thereof Download PDFInfo
- Publication number
- CN117780592A CN117780592A CN202311854103.XA CN202311854103A CN117780592A CN 117780592 A CN117780592 A CN 117780592A CN 202311854103 A CN202311854103 A CN 202311854103A CN 117780592 A CN117780592 A CN 117780592A
- Authority
- CN
- China
- Prior art keywords
- piston
- oil
- gas
- connecting rod
- machine body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005461 lubrication Methods 0.000 title claims abstract description 23
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 230000003139 buffering effect Effects 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 57
- 239000003921 oil Substances 0.000 claims description 31
- 239000010687 lubricating oil Substances 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 239000010724 circulating oil Substances 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 241001584775 Tunga penetrans Species 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 210000003739 neck Anatomy 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 7
- 238000007906 compression Methods 0.000 abstract description 7
- 229940050176 methyl chloride Drugs 0.000 abstract description 2
- 238000004513 sizing Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910000897 Babbitt (metal) Inorganic materials 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 241000357293 Leptobrama muelleri Species 0.000 description 1
- 229910001245 Sb alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000002140 antimony alloy Substances 0.000 description 1
- GVFOJDIFWSDNOY-UHFFFAOYSA-N antimony tin Chemical compound [Sn].[Sb] GVFOJDIFWSDNOY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Compressor (AREA)
Abstract
The invention discloses an oil-free lubrication reciprocating piston type gas compressor and an automatic control system thereof, wherein the oil-free lubrication reciprocating piston type gas compressor comprises two primary cylinders and two secondary cylinders, the primary cylinders and the secondary cylinders are connected with a driving end of a three-phase asynchronous motor through a rigid coupling, the primary cylinders and the secondary cylinders comprise a machine body, a crankshaft, a connecting rod and a piston, the crankshaft, the connecting rod and the piston are sequentially arranged in the machine body, and the rotary motion of the crankshaft is converted into the linear reciprocating motion of the piston through the connecting rod. Before gas gets into the second grade cylinder, through inhaling the buffer and buffering gas, after the second grade cylinder compresses gas, cool off through the second grade cooler once more to use the second grade separator to separate gas at last, use the secondary blow off pipe to carry out blowdown, the cooperation between the first grade cylinder of many numbers and the second grade cylinder is used, has accelerated holistic work efficiency, promotes the compression to methyl chloride gas, and has reduced time cost.
Description
Technical Field
The invention relates to an oil-free lubrication reciprocating piston type gas compressor and an automatic control system thereof.
Background
The gas compressor is a power device for converting mechanical energy into gas pressure energy, is commonly used for pneumatic tools to provide gas power, and is also commonly used for pressure-feeding oxygen, hydrogen, ammonia, natural gas, coke oven gas, inert gas and other mediums in petrochemical industry, drilling and mining industries, metallurgy and other industries.
However, the existing gas compressors are used for compressing methyl chloride by adopting a single body, so that the compression efficiency is low, and better compression effect cannot be provided.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an oil-free lubrication reciprocating piston type gas compressor and an automatic control system thereof, wherein the oil-free lubrication reciprocating piston type gas compressor is driven by a three-phase asynchronous motor through a rigid coupling, compressed chloromethane enters a first-stage exhaust buffer after being buffered by an inlet buffer, is cooled by a first-stage cooler, is separated by a first-stage separator, is discharged by a first-stage blow-down pipe, is buffered by an air suction buffer before entering a second-stage cylinder, is cooled again by a second-stage cooler after being compressed by the second-stage cylinder, is separated by a second-stage separator, is discharged by a second-stage blow-down pipe, is matched with a plurality of first-stage cylinders and second-stage cylinders, so that the overall working efficiency is accelerated, the compression of chloromethane gas is improved, and the time cost is reduced.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an oilless lubrication reciprocating piston type gas compressor, includes two one-level cylinders and two secondary cylinders, one-level cylinder and secondary cylinder pass through rigid coupling and are connected with three-phase asynchronous motor drive end, one-level cylinder and secondary cylinder include fuselage, bent axle, connecting rod and piston set gradually in the fuselage, through the straight line reciprocating motion of connecting rod with the rotary motion conversion piston of bent axle.
As a preferable technical scheme of the invention, the machine body is of a rectangular box type integral structure, a supporting beam is arranged at an opening at the upper part of the machine body, four flange faces are arranged at two sides of the machine body for installing the middle body, and adjusting screws are arranged at anchor screw holes at two sides of the machine body for adjusting the level during installation.
As a preferable technical scheme of the invention, the middle body is of a floor box type structure, rectangular windows for overhauling the inside are arranged on two sides of the middle body, and inclined bottom surfaces which are convenient for lubricating oil to flow back to the machine body are arranged on two sides of an inner slideway of the middle body.
As a preferable technical scheme of the invention, the crankshaft is double-crank type, the offset angles between the double crank type and the crank type are 90 degrees, and the two crank necks of the two opposite rows of the crankshaft are equally divided by 180 degrees.
As a preferable technical scheme of the invention, the connecting rod comprises a connecting rod body and a connecting rod cover, wherein the connecting rod cover of the connecting rod body is made of carbon steel, one end of the connecting rod is connected with a crankshaft, and the other end of the connecting rod is connected with a piston.
As a preferable technical scheme of the invention, the piston comprises a piston rod, a piston body, a piston ring, a supporting ring and a locking nut, wherein the piston rod is inserted into the piston body, the piston ring is sleeved on the surface of the piston body, the supporting ring is arranged in the piston body, and the locking nut is arranged on the outer side of the piston body and used for fixing the piston rod in the piston body.
As a preferable technical scheme of the invention, the piston body is cast by aluminum alloy, and the piston ring and the supporting ring are made by filled polytetrafluoroethylene.
As a preferable technical scheme of the invention, the upper end of the machine body is provided with a circulating oil inlet, the lower end of the machine body is provided with a circulating oil return port, and lubricating oil flowing back to the machine body flows back to the lubricating oil station through the oil return port.
As a preferable technical scheme of the invention, a top cover is arranged at the top of the machine body, and a turning mechanism is arranged at the front end of the machine body.
A control system for an oil-free lubrication reciprocating piston gas compressor, comprising:
s1, starting a three-phase asynchronous motor, operating for 5-10 minutes under an empty load, opening a nitrogen inlet valve for replacement after confirming that the operation is normal, opening the inlet valve after the replacement is finished, replacing nitrogen in a unit by a medium in the system, gradually closing an emptying valve to gradually increase the pressure,
s2, when the final-stage pressure after replacement reaches the rated working pressure, the two first-stage cylinders and the two second-stage cylinders are driven by a three-phase asynchronous motor through a rigid coupling, and compressed chloromethane enters a first-stage exhaust buffer after being buffered by an inlet buffer;
s3, cooling the gas through a primary cooler, separating the gas by using a primary separator, discharging the gas by using a primary discharge pipe, and buffering the gas through an air suction buffer before the gas enters a secondary cylinder;
s4, after the gas is compressed by the secondary cylinder, cooling the gas by the secondary cooler again, and finally separating the gas by using a secondary separator and discharging the gas by using a secondary blow-off pipe;
s5, after the vehicle is stopped, opening a vent valve, closing a valve for a system to go on an exhaust pipeline, slowly opening a loop valve, and gradually lowering to enable the compressor to idle;
s5-2, closing a first-stage inlet valve to enable the compressor to run under empty load, and then cutting off a power supply of the three-phase asynchronous motor;
s5-3, after the primary cylinder and the secondary cylinder completely stop running, cutting off the power supply of an oil pump motor of the thin oil station, and closing a cooling water total inlet valve;
s5-4, closing a water inlet valve on the cooling water pipeline.
Compared with the prior art, the invention has the following beneficial effects:
1. the compressed chloromethane is buffered by the inlet buffer and then enters the first-stage exhaust buffer through the rigid coupling, then is cooled by the first-stage cooler, and is separated by the first-stage separator, pollution discharge is carried out by the first-stage pollution discharge pipe, before the gas enters the second-stage cylinder, the gas is buffered by the air suction buffer, after the gas is compressed by the second-stage cylinder, the gas is cooled by the second-stage cooler again, and finally is separated by the second-stage separator, pollution discharge is carried out by the second-stage pollution discharge pipe, and the cooperation between the first-stage cylinder and the second-stage cylinder with a plurality of numbers is used, so that the whole working efficiency is accelerated, the compression of the chloromethane gas is improved, and the time cost is reduced.
Drawings
FIG. 1 is a schematic view of a first view angle structure of the present invention;
FIG. 2 is a schematic diagram of a second view angle structure of the present invention;
FIG. 3 is a schematic view of a first view structure of a first stage cylinder according to the present invention;
FIG. 4 is a schematic view of a second view angle structure of the primary cylinder according to the present invention;
FIG. 5 is a schematic view of the structure of the crankshaft of the present invention;
FIG. 6 is a schematic view of the piston rod of the present invention;
FIG. 7 is a schematic view of the lock nut of the present invention;
FIG. 8 is a schematic diagram of a control system of the present invention;
FIG. 9 is a first partial schematic view of the control system of the present invention;
FIG. 10 is a second partial schematic view of the control system of the present invention;
FIG. 11 is a third partial schematic view of the control system of the present invention.
Wherein: 1. a first-stage cylinder; 2. a second-stage cylinder; 3. a rigid coupling; 4. a three-phase asynchronous motor; 5. a body; 6. a crankshaft; 7. a connecting rod; 8. a piston; 9. a midbody; 10. a rectangular window; 11. a circulating oil inlet; 12. a top cover; 13. a piston rod; 14. a piston body; 15. piston rings; 16. a support ring; 17. and (5) locking the nut.
Detailed Description
In order that the manner in which the above recited features, objects and advantages of the present invention are obtained will become readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Based on the examples in the embodiments, other examples that a person skilled in the art would obtain without making any inventive effort fall within the scope of the invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents, etc. used in the following examples are commercially available unless otherwise specified.
Examples:
as shown in fig. 1-11, the embodiment provides an oil-free lubrication reciprocating piston 8 type gas compressor, which comprises two primary cylinders 1 and two secondary cylinders 2, wherein the primary cylinders 1 and the secondary cylinders 2 are connected with the driving end of a three-phase asynchronous motor 4 through a rigid coupling 3, the primary cylinders 1 and the secondary cylinders 2 comprise a machine body 5, a crankshaft 6, a connecting rod 7 and a piston 8, the crankshaft 6, the connecting rod 7 and the piston 8 are sequentially arranged in the machine body 5, and the rotary motion of the crankshaft 6 is converted into the linear reciprocating motion of the piston 8 through the connecting rod 7;
compressed chloromethane enters into a first-stage exhaust buffer after being buffered by an inlet buffer, is cooled by a first-stage cooler, is separated by a first-stage separator, is discharged by a first-stage discharge pipe, is buffered by an air suction buffer before entering into a second-stage cylinder 2, is cooled again by the second-stage cooler after being compressed by the second-stage cylinder 2, is separated by a second-stage separator, is discharged by a second-stage discharge pipe, is matched with the first-stage cylinder 1 and the second-stage cylinder 2 in a plurality of numbers, accelerates the overall working efficiency, improves the compression of chloromethane gas, and reduces the time cost.
The machine body 5 is of a rectangular box type integral structure, a supporting beam is arranged at an opening at the upper part of the machine body 5, four flange faces are arranged at two sides of the machine body 5 and used for installing the middle body 9, and adjusting screws are arranged at anchor screw holes at two sides of the machine body 5 and used for adjusting the level during installation;
the frame is of a rectangular box type integral structure and is made of gray cast iron, a supporting beam is arranged at the upper opening, and the frame is fixed by a stud bolt, so that the frame 5 has enough rigidity. Four flange surfaces are arranged on two sides for installing the middle body 9. Five main bearings are arranged in the machine body 5, and the bearing bush is a steel back tin-antimony alloy thin-wall bush. The radial clearance between the bearing and the journal is ensured by processing, and the installation is realized by selecting and adjusting the bearing without scraping and repairing. The bearing bush cannot be repaired after being worn, and only the corresponding matched bearing can be replaced. The top of the machine body 5 is provided with a top cover 12, and the top cover 12 is provided with a respirator. End covers are arranged at two ends of the machine body 5, a sealing lubricating device is arranged in a bearing hole of the end cover of the motor end, and a jigger mechanism is arranged at the other end of the sealing lubricating device. The upper end of the machine body 5 is provided with a circulating oil inlet 11, the lower part is provided with a circulating oil return port, and lubricating oil flowing back to the machine body 5 flows back to a thin oil station through the oil return port. The two sides of the machine body 5 are provided with adjusting screws at the screw holes for adjusting the level during installation.
The middle body 9 is of a floor box type structure, rectangular windows 10 for overhauling the inside are arranged on two sides of the middle body 9, and inclined bottom surfaces which are convenient for lubricating oil to flow back to the machine body 5 are arranged on two sides of a slideway in the middle body 9;
the floor box structure is made of gray cast iron, and the bottom support is directly fastened with the foundation, so that the stress of the machine body 5 is improved. Rectangular windows 10 are arranged on two sides, the cross head can be disassembled and assembled from the windows during maintenance, the oil wiper can be replaced, and meanwhile, the middle body 9 and the air cylinder connecting bolt are fastened at the windows. Inclined bottom surfaces are arranged on two sides of the inner slideway of the middle body 9, so that lubricating oil can flow back to the machine body 5 conveniently. The lower edge bonding surface of the middle body 9 and the machine body 5 is completely bonded on the supporting table surface of the machine body 5 during assembly, and then a positioning pin is arranged between the bonding surface of the middle body 9 and the machine body 5.
Wherein the crank shaft 6 is double-crank type, the stagger angle between the double crank type and the crank shaft 6 is equal to two crank necks of two rows at 180 degrees. The middle part is free from bearing, so that the forces of the two opposite rows of pistons 8 can be mutually offset, and the abrasion and power consumption of the main bearing are improved. The four main journals serve as main bearing points and are provided with an auxiliary positioning bearing for fixing the crankshaft 6 and controlling the axial movement of the crankshaft 6. One end of the crankshaft 6 is connected with the main motor through a coupler, and the other end is meshed with a gear of the jigger mechanism through a gear. The main journal bores through the crankpin with oil holes for lubricating the crankpin with lubricating oil. An oil throwing ring is arranged at one end close to the motor, forced circulation lubrication is adopted by adopting pressure oil, a thin oil station oil pump sucks lubricating oil from an oil tank, the lubricating oil is conveyed to an oil inlet of the machine body 5 through an oil filter, a cooler and an oil pipe, the lubricating oil entering the oil inlet of the machine body 5 is distributed to each main bearing, then enters a big end bearing of a connecting rod 7 through an oil hole in a crankshaft 6, flows to a small end tile of the connecting rod 7 through an oil hole in the connecting rod 7, and then is conveyed to a cross slideway through a cross pin and a cross body. Lubrication is carried out at these lubrication points and friction heat is taken away, and then flows back to the thin oil station through the intermediate body 9, the oil return port and the pipeline at the bottom of the machine body 5.
The connecting rod 7 comprises a connecting rod 7 body and a connecting rod 7 cover, wherein the connecting rod 7 body and the connecting rod 7 cover are made of carbon steel, one end of the connecting rod 7 is connected with the crankshaft 6, and the other end of the connecting rod 7 is connected with the piston 8. The function of the connecting rod 7 is to convert the rotational motion of the crankshaft 6 into linear reciprocating motion of the crosshead, piston 8. The connecting rod 7 is composed of a connecting rod 7 body and a connecting rod 7 cover and is made of high-quality carbon steel, a Babbitt alloy split bearing is arranged at the big end of the connecting rod 7, the connecting rod 7 body is fixed by a connecting rod 7 bolt and a nut, a bronze shaft sleeve is pressed in the small end of the connecting rod 7, a lubricating oil groove is formed in the connecting rod 7, lubricating oil flows into the oil groove through a cross pin oil hole, and the small end shaft sleeve and the cross pin of the connecting rod 7 are lubricated.
The piston 8 comprises a piston rod 13, a piston body 14, a piston ring 15, a supporting ring 16 and a locking nut 17, wherein the piston rod 13 is inserted into the piston body 14, the piston ring 15 is sleeved on the surface of the piston body 14, the supporting ring 16 is arranged in the piston body 14, and the locking nut 17 is arranged outside the piston body 14 and used for fixing the piston rod 13 in the piston body 14. The piston rod 13 is made of alloy steel 38CrMoAlA, has high surface hardness and enough strength and wear resistance and corrosion resistance after surface nitriding treatment, the piston body 14 is cast by aluminum alloy, and the piston ring 15 and the supporting ring 16 are made of filled polytetrafluoroethylene. The upper end of the machine body 5 is provided with a circulating oil inlet 11, the lower end of the machine body is provided with a circulating oil return port, and lubricating oil flowing back to the machine body 5 flows back to a thin oil station through the oil return port. The top of the machine body 5 is provided with a top cover 12, and the front end of the machine body 5 is provided with a jigger mechanism.
Wherein the unit is provided with a nitrogen replacement loop, a receiving cylinder and a filling nitrogen protection pipeline simultaneously, thereby preventing harmful medium from leaking and ensuring the personal safety of the side of the unit.
In order to protect the safe and normal operation of the primary cylinder 1 and the secondary cylinder 2, the control system is provided with an automatic control interlocking protection besides a safety valve, and when the primary cylinder 1 or the secondary cylinder 2 is in a dangerous working condition, the automatic control interlocking protection can automatically give an alarm or stop. And alarming for abnormal air inlet and exhaust pressure, alarming for too low cooling water pressure and lubricating oil pressure and stopping. And alarming when the temperature of the main bearing exceeds 80 ℃, and stopping the main bearing at a temperature exceeding 85 ℃. And alarming when the temperature of the main motor bearing exceeds 90 ℃, and stopping at a temperature exceeding 95 ℃. And the temperature of the lubricating oil exceeds 55 ℃ and the alarm is given.
When the machine body 5 is installed, a user can firstly assemble the middle body 9 and the machine body 5 and then lift the middle body and the machine body to be in place on a foundation according to the on-site lifting capacity, and can also respectively lift the middle body and the machine body to be assembled after the middle body and the machine body are lifted to the foundation. When the middle body 9 is assembled to the machine body 5, the flange lower edge platform surface of the middle body 9 is tightly attached to the positioning surface of the machine body 5. The connecting bolts of the middle body 9 and the machine body 5 are screwed on the inner side of the machine body 5, the bolts are repeatedly screwed in a crossing manner during screwing, and the bolts are checked one by one to ensure that the pretightening force of each bolt meets the requirement. On the basis of the finished product, the foundation bolts of the machine body 5 and the middle body 9 are placed into reserved foundation bolt holes of the foundation, the foundation bolts of the middle body 9 can be sleeved with galvanized iron sheet coiled tubes, the foundation surface below the base adjusting bolts of the machine body 5 is shoveled in advance, and then sizing blocks (70 multiplied by 20mm steel plates and self-contained by users) are placed. And then the machine body 5 and the middle body 9 are hung on the foundation, and the anchor screws penetrate into screw holes corresponding to the machine body 5 and the middle body 9. The horizontal direction of the machine body 5 and the middle body 9 is adjusted by adjusting screws and a level meter. The longitudinal level takes bearing holes at two ends of the machine body 5 as a reference, and the middle bearing is used as a reference. The transverse level is measured at three points of the front, middle and back of the slideway by taking the slideway surfaces of the four middle bodies 9 as reference surfaces. After the reading is measured by the level meter, the level meter is turned 180 degrees, and the level meter is measured again at the position, and the two readings are in the specified range. The average of the two readings is the measurement. The base supporting surfaces of the machine body 5 and the middle body 9 are about 50mm high from the base surface, cement mortar is filled into the reserved holes of the foundation bolts for 100-150 mm high, then compact dry sand is filled to about 150mm below the secondary grouting layer, cement mortar is filled into the upper portion of the foundation to the base surface, meanwhile, the foundation bolts are guaranteed to be arranged at the centers of the bolt holes of the machine body 5 and the middle body 9, after the mortar is half-dried, a group of sizing blocks (each group of sizing blocks comprises two oblique iron blocks, one piece of flat iron blocks, 48 groups of sizing blocks are filled, and a user is self-provided) are respectively inserted at two sides of the foundation bolts. And after the mortar is completely dried and fixed, adjusting levelness of the machine body 5 and the middle body 9 by using an adjusting sizing block. The anchor screws of the body 5 and the middle body 9 are uniformly and gradually tightened according to a certain sequence. At the same time, the levelness of the main body 5 and the middle body 9 is checked, and if the levelness is changed, the sizing block calibration is adjusted. After all the anchor screws are screwed, the levelness of the machine body 5 and the middle body 9 is in accordance with a specified value, after inspection and acceptance, the welding of the adjusting sizing block point is prevented from loosening, and secondary grouting is performed. In the secondary grouting, the bottom surfaces of the machine body 5 and the middle body 9 are ensured, and each group of sizing blocks are tightly adhered to mortar, so that gaps and clearances are not allowed to exist.
During the installation of the crankshaft 6, the matching condition of the journal of the crankshaft 6 and each bearing is checked by a painting method, and the contact area is not less than 85 percent. The lower half tile of the main bearing is placed in the main bearing hole of the machine body 5, the crankshaft 6 is installed in the machine body 5, the upper half tile of the main bearing and the main bearing cover are placed, the compression nut of the bearing cover is screwed down, the screwing torque is completed in three times, and then the repeated detection is carried out once. The radial clearance between the main journal and the main bearing is 0.13-0.209 mm. The main bearing is a thin-wall tile, and the precision is not adjusted by a scraping method during installation. To check the mounting accuracy, it should be checked that the difference in opening degree of the crank for one rotation of the crankshaft 6 is not more than 0.032mm.
When the connecting rod 7 is installed, the matching condition of the big end bushing of the connecting rod 7 and the crank pin is firstly checked, and the contact area of the Babbitt metal and the crank pin is not less than 60 percent. The gap between the big end bearing bush of the connecting rod 7 and the crank pin is 0.13-0.209 mm. And (3) checking the matching condition of the small-head bushing of the connecting rod 7 and the cross pin, wherein the contact area of the bushing and the cross pin is not less than 70%, and the radial clearance is 0.085-0.173 mm. The axial distance between the two ends of the small-end bushing and the cross head body is 2.5-3.0 mm. When the bolt and the nut of the connecting rod 7 are screwed, enough pretightening force is needed when the connecting rod 7 is screwed, and the elongation of the bolt of the connecting rod 7 is ensured to be 0.30-0.35 mm. After the nut is screwed, the radial clearance between the bearing and the crank pin is checked, the clearance can be measured by pressing out by a metal wire method, and the clearance is within 0.13-0.209 mm.
When the piston 8 is mounted, the piston rings 15 are mounted on the piston body 14 with openings which are 180 ° to each other and which are free to rotate in the grooves of the piston rings 15. And uniformly coating a layer of zero number molybdenum disulfide powder on the surfaces of the cylinder mirror surface and the piston rod 13, and removing the molybdenum disulfide powder on the superfluous parts of the surfaces. The piston 8 is respectively arranged in each stage of air cylinders (the end part of the piston rod 13 is screwed with a packing protection sleeve so that the piston rod 13 smoothly passes through the packing and the oil wiper to avoid damaging friction surfaces of the piston rod 13 when passing through the packing and the oil wiper), the piston rod 13 is parallel to the axis of the slideway of the middle body 9, the inclination direction of the piston rod is consistent with the inclination of the slideway of the middle body 9, and the left and right gaps of the piston 8 are symmetrical and uniform. The dead point clearance of the piston 8 is adjusted by adjusting the thickness of the gasket, and finally the nut 17 and the backstop pin are locked.
A control system for an oil-free lubricated reciprocating piston 8 type gas compressor comprising:
s1, starting a three-phase asynchronous motor 4, operating for 5-10 minutes under an empty load, opening a nitrogen inlet valve for replacement after confirming that the operation is normal, opening the inlet valve after the replacement is finished, replacing nitrogen in a unit by a medium in the system, gradually closing an emptying valve to gradually increase the pressure,
s2, when the final-stage pressure after replacement reaches the rated working pressure, the two first-stage air cylinders 1 and the two second-stage air cylinders 2 are driven by a three-phase asynchronous motor 4 through a rigid coupling 3, and compressed chloromethane enters a first-stage exhaust buffer after being buffered by an inlet buffer;
s3, cooling the gas through a primary cooler, separating the gas by using a primary separator, discharging the gas by using a primary discharge pipe, and buffering the gas through an air suction buffer before the gas enters a secondary cylinder 2;
s4, after the gas is compressed by the secondary cylinder 2, cooling the gas by a secondary cooler again, and finally separating the gas by a secondary separator and discharging the gas by a secondary blow-off pipe;
s5, after the vehicle is stopped, opening a vent valve, closing a valve for a system to go on an exhaust pipeline, slowly opening a loop valve, and gradually lowering to enable the compressor to idle;
s5-2, closing a first-stage inlet valve to enable the compressor to run under empty load, and then cutting off the power supply of the three-phase asynchronous motor 4;
s5-3, after the primary cylinder 1 and the secondary cylinder 2 completely stop running, cutting off the power supply of an oil pump motor of the lean oil station, and closing a cooling water total inlet valve;
s5-4, closing a water inlet valve on the cooling water pipeline.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above" and "over" a second feature includes both the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "under," "under" and "beneath" the second feature includes the first feature being directly under and obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the present invention is not limited by the foregoing description of embodiments, which are given by way of example only, and not as a limitation, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides an oilless lubrication reciprocating piston type gas compressor, includes two one-level cylinder (1) and two second grade cylinders (2), one-level cylinder (1) and second grade cylinder (2) are connected with three-phase asynchronous motor (4) drive end through rigid coupling (3), one-level cylinder (1) and second grade cylinder (2) include fuselage (5), bent axle (6), connecting rod (7) and piston (8) set gradually in fuselage (5), through the straight reciprocating motion of rotary motion conversion piston (8) of connecting rod (7) with bent axle (6).
2. An oil-free lubrication reciprocating piston gas compressor as claimed in claim 1, wherein: the machine body (5) is of a rectangular box-type integral structure, a supporting beam is arranged at an opening at the upper part of the machine body (5), four flange faces are arranged at two sides of the machine body (5) and used for installing the middle body (9), and adjusting screws are arranged at the positions of anchor screw holes at two sides of the machine body (5) and used for adjusting the level during installation.
3. An oil-free lubrication reciprocating piston gas compressor according to claim 2, wherein: the middle body (9) is of a floor box type structure, rectangular windows (10) used for overhauling the inside are arranged on two sides of the middle body (9), and inclined bottom surfaces which are convenient for lubricating oil to flow back to the machine body (5) are arranged on two sides of an inner slideway of the middle body (9).
4. An oil-free lubrication reciprocating piston gas compressor as claimed in claim 1, wherein: the crankshaft (6) is double-crank, the stagger angle between the double crank and the crankshaft is 90 degrees, and the two crank necks of the two opposite rows of the crankshaft (6) are equally divided by 180 degrees.
5. An oil-free lubrication reciprocating piston gas compressor as claimed in claim 1, wherein: the connecting rod (7) comprises a connecting rod (7) body and a connecting rod (7) cover, wherein the connecting rod (7) body and the connecting rod (7) cover are made of carbon steel, one end of the connecting rod (7) is connected with the crankshaft (6), and the other end of the connecting rod is connected with the piston (8).
6. An oil-free lubrication reciprocating piston gas compressor as claimed in claim 1, wherein: the piston (8) comprises a piston rod (13), a piston body (14), a piston ring (15), a supporting ring (16) and a locking nut (17), wherein the piston rod (13) is inserted into the piston body (14), the piston ring (15) is sleeved on the surface of the piston body (14), the supporting ring (16) is arranged in the piston body (14), and the locking nut (17) is arranged on the outer side of the piston body (14) and used for fixing the piston rod (13) in the piston body (14).
7. An oil-free lubrication reciprocating piston gas compressor as claimed in claim 6, wherein: the piston body (14) is cast by aluminum alloy, and the piston ring (15) and the supporting ring (16) are made by filled polytetrafluoroethylene.
8. An oil-free lubrication reciprocating piston gas compressor as claimed in claim 1, wherein: the upper end of the machine body (5) is provided with a circulating oil inlet (11), the lower end of the machine body is provided with a circulating oil return port, and lubricating oil flowing back to the machine body (5) flows back to the lubricating oil station through the oil return port.
9. An oil-free lubrication reciprocating piston gas compressor as claimed in claim 7, wherein: the top of the machine body (5) is provided with a top cover (12), and the front end of the machine body (5) is provided with a jigger mechanism.
10. A control system of oil-free lubrication reciprocating piston type gas compressor is characterized in that: comprising the following steps:
s1, starting a three-phase asynchronous motor (4), operating for 5-10 minutes under an empty load, opening a nitrogen inlet valve for replacement after confirming that the operation is normal, opening the inlet valve after the replacement is finished, replacing nitrogen in a unit by a medium in the system, gradually closing an emptying valve to gradually increase the pressure,
s2, when the final-stage pressure after replacement reaches the rated working pressure, the two primary cylinders (1) and the two secondary cylinders (2) are driven by a three-phase asynchronous motor (4) through a rigid coupling (3), and compressed chloromethane enters a primary exhaust buffer after being buffered by an inlet buffer;
s3, cooling the gas through a primary cooler, separating the gas by using a primary separator, discharging the gas by using a primary discharge pipe, and buffering the gas through an air suction buffer before the gas enters a secondary cylinder (2);
s4, after the gas is compressed by the secondary air cylinder (2), cooling the gas by the secondary cooler again, and finally separating the gas by the secondary separator and discharging the gas by the secondary blow-off pipe;
s5, after the vehicle is stopped, opening a vent valve, closing a valve for a system to go on an exhaust pipeline, slowly opening a loop valve, and gradually lowering to enable the compressor to idle;
s5-2, closing a first-stage inlet valve to enable the compressor to run under empty load, and then cutting off a power supply of the three-phase asynchronous motor (4);
s5-3, after the primary cylinder (1) and the secondary cylinder (2) completely stop running, cutting off the power supply of an oil pump motor of the thin oil station, and closing a cooling water total inlet valve;
s5-4, closing a water inlet valve on the cooling water pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311854103.XA CN117780592A (en) | 2023-12-29 | 2023-12-29 | Oil-free lubrication reciprocating piston type gas compressor and automatic control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311854103.XA CN117780592A (en) | 2023-12-29 | 2023-12-29 | Oil-free lubrication reciprocating piston type gas compressor and automatic control system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117780592A true CN117780592A (en) | 2024-03-29 |
Family
ID=90394324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311854103.XA Pending CN117780592A (en) | 2023-12-29 | 2023-12-29 | Oil-free lubrication reciprocating piston type gas compressor and automatic control system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117780592A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118188411A (en) * | 2024-04-23 | 2024-06-14 | 四川简阳耐达机械设备有限公司 | Movable does not have fixed basic compressor |
-
2023
- 2023-12-29 CN CN202311854103.XA patent/CN117780592A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118188411A (en) * | 2024-04-23 | 2024-06-14 | 四川简阳耐达机械设备有限公司 | Movable does not have fixed basic compressor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN117780592A (en) | Oil-free lubrication reciprocating piston type gas compressor and automatic control system thereof | |
| RU2587019C2 (en) | Oil-free air compressor for rail vehicles | |
| CN100439705C (en) | Compression apparatus | |
| CN204610180U (en) | A kind of reciprocating piston type exhaust gas compressor of opposed type four row three stage compression | |
| CN113464391B (en) | High-power five-cylinder drilling pump system, solid control system and drilling machine | |
| CN208605626U (en) | A kind of polymer-injecting pump adjustable type Jie's rod seal apparatus | |
| CN107923376B (en) | Reciprocating piston compressor, spare part set for reciprocating piston compressor and use of connecting rod in reciprocating piston compressor | |
| RU185756U1 (en) | Piston compressor | |
| WO2020005101A1 (en) | Reciprocating compressor | |
| CN210196010U (en) | New forms of energy do not have oily sliding vane type air compressor machine | |
| CN2861544Y (en) | Three row of five-step non-lubricated oxygen air compressor | |
| CN2209221Y (en) | Multipurpose hydrogen compressor | |
| GB2175653A (en) | An air cooling and reciprocating type of air compressor without lubricant | |
| CN115750288A (en) | Oil-free lubrication piston type air compressor | |
| US20240175435A1 (en) | Power End Housing for Plunger Pump and Plunger Pump Including Power End Housing | |
| CN216447290U (en) | A compressor crankshaft for natural gas pressure boost operation | |
| CN109915340A (en) | Three column of long wheelbase, three cylinder vertical compressor | |
| RU2819971C1 (en) | Compressor with possibility of working cylinders replacement | |
| Watterson | Rotating Equipment: Maintenance and Troubleshooting | |
| Kulasekaran et al. | Studies on the Hard Chrome Plating in Reciprocating Air Compressors | |
| Giampaolo | Compressor Types | |
| WO2024114297A1 (en) | Power end housing for plunger pump and plunger pump comprising power end housing | |
| Balashanmugam et al. | DESIGN AND FABRICATION OF MULTI ENGINE AIR COMPRESSOR | |
| CN117905689A (en) | Power end shell for plunger pump and plunger pump comprising power end shell | |
| CA2591491A1 (en) | Dry-running piston compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |