CN108825503B - Air supplementing device of oil injection screw type vacuum pump - Google Patents
Air supplementing device of oil injection screw type vacuum pump Download PDFInfo
- Publication number
- CN108825503B CN108825503B CN201811008290.9A CN201811008290A CN108825503B CN 108825503 B CN108825503 B CN 108825503B CN 201811008290 A CN201811008290 A CN 201811008290A CN 108825503 B CN108825503 B CN 108825503B
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- oil
- vacuum pump
- injection screw
- screw type
- type vacuum
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- 238000002347 injection Methods 0.000 title claims abstract description 102
- 239000007924 injection Substances 0.000 title claims abstract description 102
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- 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
Abstract
The invention relates to an air supplementing device of an oil injection screw type vacuum pump, which comprises an oil injection screw type vacuum pump main machine and an oil-gas separation device, wherein an air pipe is fixedly arranged on the oil injection screw type vacuum pump main machine, one end of the air pipe is communicated with a machine cavity of the oil injection screw type vacuum pump main machine, and the other end of the air pipe is communicated with an inner cavity of the oil-gas separation device and is positioned above the oil liquid level of the oil-gas separation device. The invention has simple structure and few parts, so the reliability is extremely high and the manufacturing cost is extremely low.
Description
Technical Field
The invention relates to the field of oil injection screw type vacuum pumps, in particular to an air supplementing device of an oil injection screw type vacuum pump.
Background
The vacuum pump is widely applied to the fields of electronics, printing and papermaking, chemical medicine, food processing, packaging, material processing and the like. Currently, commercially available vacuum pumps include dry screw vacuum pumps, water ring pumps, reciprocating pumps, slide valve pumps, rotary vane pumps, roots pumps, diffusion pumps, and the like. The vacuum pumps are limited by the working principles and structures of various vacuum pumps, and the vacuum pumps have more or less defects in the use process, for example, the energy consumption of water ring pumps is very high, the flow rate of dry screw pumps and reciprocating pumps is very small, the vacuum degree of single-stage Roots pumps is not high, and the vacuum pump can only be used in occasions with low requirements on the vacuum degree, and the like.
The oil injection screw vacuum pump injects oil to the main machine cavity of the oil injection screw vacuum pump through the oil-gas separation device, so that the ultimate vacuum degree of the single-stage oil injection screw vacuum pump can reach 0.2Torr (1 Torr=133.3Pa), and the maximum pumping speed can reach 9000m 3 And/h, variable-frequency vacuumizing can be realized, the oil injection screw type vacuum pump is suitable for various working conditions, and compared with a water ring pump, the energy is saved by more than 40%, so that the oil injection screw type vacuum pump is more and more widely applied.
However, when the internal vacuum degree of the oil injection screw vacuum pump reaches about 100Torr, the proportion of the sucked gas amount relative to the oil injection amount of the oil injection screw vacuum pump is small, and the excessive intake vacuum degree can cause the vibration of the rotor in the machine cavity to be aggravated, so that the noise and vibration of the oil injection screw vacuum pump are obviously improved. At present, there are mainly two solutions:
a principle of the device is that a PLC is utilized to receive a vacuum sensor signal, and when the fact that the vacuum degree in the oil injection screw type vacuum pump reaches 100Torr is detected, the PLC sends out a command to start the electromagnetic valve to supplement air for the oil injection screw type vacuum pump. The air supplementing amount of the air supplementing mode cannot be adjusted, and the electromagnetic valve, particularly the large-flux electromagnetic valve, is high in cost, and in addition, the electromagnetic valve is easy to damage and is not beneficial to controlling the cost.
Referring to fig. 1, another way is to install a check valve 4 at the air compensating port of the oil injection screw vacuum pump cavity, when the vacuum degree in the oil injection screw vacuum pump cavity reaches 100Torr, the pressure difference between the external atmospheric pressure and the oil injection screw vacuum pump cavity overcomes the spring force of the check valve, and the atmospheric pressure supplements air to the oil injection screw vacuum pump cavity. Noise is generated at the beginning of the air supplementing mode, and in addition, the reliability of the check valve spring is poor, so that oil in the oil injection screw type vacuum pump cavity is easily leaked.
Both the above solutions are air-supplementing from the atmosphere, so that an air filter 5 needs to be additionally arranged at the air inlet of the electromagnetic valve or the one-way valve, thus increasing the use cost of customers.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a gas supplementing device of an oil injection screw vacuum pump, which has the advantages of simple structure and few parts, thus the reliability is extremely high and the manufacturing cost is extremely low.
The technical scheme of the invention is as follows: the utility model provides a make-up air device of oil injection screw vacuum pump, includes oil injection screw vacuum pump host computer, still includes oil-gas separation device, fixed a breather pipe that is equipped with on the oil injection screw vacuum pump host computer, the one end and the quick-witted chamber intercommunication of oil injection screw vacuum pump host computer of breather pipe, the other end of breather pipe with oil-gas separation device's inner chamber intercommunication is located oil-gas separation device's oily liquid level top.
The breather pipe adopts a hard pipeline.
The vent pipe adopts a soft pipeline.
The vent pipe is formed by connecting at least one section of hard pipeline and at least one section of soft pipeline.
The hard pipeline is copper pipe or iron pipe or steel pipe or aluminum pipe.
The soft pipeline is an oil-resistant cloth-added rubber pipe, an oil-resistant spiral rubber pipe or an oil-conveying steel wire braided rubber pipe.
The oil-gas separation device is an oil-gas separation device with an oil injection screw vacuum pump, or the oil-gas separation device is an independently arranged oil-gas separation device.
One end of the vent pipe is fixed on the oil injection screw type vacuum pump host machine through a pipe joint nut and is communicated with a machine cavity of the oil injection screw type vacuum pump host machine, and the other end of the vent pipe is fixed on the oil-gas separation device through the pipe joint nut and is communicated with an inner cavity of the oil-gas separation device.
One end of the vent pipe is fixed on the oil injection screw type vacuum pump host machine through flange connection and is communicated with a machine cavity of the oil injection screw type vacuum pump host machine, and the other end of the vent pipe is fixed on the oil-gas separation device through flange connection and is communicated with an inner cavity of the oil-gas separation device.
The technical scheme has the following beneficial effects:
1. the air supplementing device of the oil injection screw type vacuum pump comprises an oil injection screw type vacuum pump main machine, wherein the oil injection screw type vacuum pump main machine is used for extracting air in a container to form vacuum, and the air supplementing device also comprises an oil-gas separating device which is a conventional device for separating oil and air. The oil injection screw type vacuum pump is characterized in that a vent pipe is fixedly arranged on the oil injection screw type vacuum pump main machine, one end of the vent pipe is communicated with a machine cavity of the oil injection screw type vacuum pump main machine, the other end of the vent pipe is communicated with an inner cavity of the oil-gas separation device, the vent pipe is positioned above the oil liquid level of the oil-gas separation device, the machine cavity of the oil injection screw type vacuum pump main machine is communicated with the inner cavity of the oil-gas separation device, the oil injection screw type vacuum pump is in low vacuum, the machine cavity of the oil injection screw type vacuum pump is used for jetting air to the inner cavity of the oil-gas separation device through the vent pipe, the over-compression can be effectively avoided, the high internal compression ratio is designed, the energy saving purpose is realized, the raw material gas in the oil injection screw type vacuum pump is fed to the machine cavity of the oil injection screw type vacuum pump main machine after the oil injection screw type vacuum pump is in high vacuum, the vibration and noise increase faults are avoided, and compared with the traditional mode of air filtering, the one-way valve or electromagnetic valve is used for supplementing the air to the machine cavity of the oil injection screw type vacuum pump main machine, and the structure of the oil injection screw type vacuum pump main machine is simplified, and the mode of the inner cavity of the oil-gas separation device is communicated through the vent pipe. In addition, the main engine cavity of the oil injection screw vacuum pump main engine contains a large amount of oil, so that the oil is mixed in the discharged gas after being communicated with the inner cavity of the oil-gas separation device, the normal operation of the oil-gas separation device is not influenced, the oil is contained in the air supplementing device, the normal operation of the oil injection screw vacuum pump main engine is not influenced, the air supplementing device can also avoid the mixing of outside air and raw material gas, and compared with the traditional air supplementing structure, the oil injection screw vacuum pump adopting the air supplementing device can also be suitable for more occasions.
2. The breather pipe adopts soft pipeline, and oil injection screw vacuum pump has the vibration in the course of the work, when adopting soft pipeline and oil gas separation device intercommunication, can effectively avoid the vibration to pass through the breather pipe and transmit to oil gas separation device, prevent to produce resonance, guarantee oil gas separation device normal operating.
3. The breather pipe is formed by connecting at least one section of hard pipeline and at least one section of soft pipeline, the oil injection screw vacuum pump vibrates in the working process, and when the at least one section of soft pipeline and the at least one section of hard pipeline are communicated with the oil-gas separation device, the vibration can be effectively prevented from being transmitted to the oil-gas separation device through the breather pipe, resonance is prevented from being generated, and the normal working of the oil-gas separation device is ensured.
4. The oil-gas separation device is an oil-gas separation device of the oil-injection screw type vacuum pump, and can fully utilize the equipment of the oil-injection screw type vacuum pump, thereby forming virtuous circle. Or, the oil-gas separation device is an independently arranged oil-gas separation device, the independently arranged oil-gas separation device can be miniaturized, and the independently arranged oil-gas separation device is used as special air supplementing equipment to reduce the load of the oil-gas separation device of the oil injection screw vacuum pump.
Further description is provided below with reference to the drawings and detailed description.
Drawings
FIG. 1 is a schematic diagram of a gas make-up structure of a cavity of a fuel injection screw vacuum pump in the background art;
fig. 2 is a schematic structural view of the present invention.
In the attached drawings, 1 is an oil injection screw type vacuum pump host, 2 is an oil-gas separation device, 3 is a breather pipe, 4 is a one-way valve, and 5 is air filtration.
Detailed Description
Example 1
Referring to fig. 2, an embodiment of a gas supplementing device of a fuel injection screw vacuum pump is shown. The air supplementing device of the oil injection screw type vacuum pump comprises an oil injection screw type vacuum pump host machine 1 and further comprises an oil-gas separating device 2, wherein the oil injection screw type vacuum pump host machine and the oil-gas separating device are conventional equipment in the field of vacuum pumps, and in the embodiment, the oil-gas separating device directly selects the oil-gas separating device of the oil injection screw type vacuum pump, so that the oil-gas separating device can form oil circulation with the oil injection screw type vacuum pump host machine and supplement air to the oil injection screw type vacuum pump host machine, and of course, the oil-gas separating device can be independently arranged and is specially used for supplementing air to the oil injection screw type vacuum pump host machine. The oil-injection screw vacuum pump host 1 is fixedly provided with a vent pipe 3, the vent pipe can be a hard pipeline, such as an oil-resistant hard pipeline of a copper pipe, an iron pipe, a steel pipe, an aluminum pipe or the like, can also be a soft pipeline, such as an oil-resistant cloth rubber pipe, an oil-resistant spiral rubber pipe, an oil-delivery steel wire braided rubber pipe or the like, and can also be formed by connecting at least one section of hard pipeline and at least one section of soft pipeline. One end of the vent pipe 3 is communicated with the cavity of the oil injection screw type vacuum pump host 1, the other end of the vent pipe 3 is communicated with the cavity of the oil-gas separation device 2, and is positioned above the oil liquid level of the oil-gas separation device 2, specifically, an external thread pipe is arranged on the oil injection screw type vacuum pump host and is communicated with the cavity of the oil injection screw type vacuum pump host, one end of the vent pipe is fixedly connected and communicated with the external thread pipe through a pipe joint nut, an external thread pipe is arranged on the side wall of the oil-gas separation device and is communicated with the cavity of the oil-gas separation device, and is positioned above the oil liquid level, the other end of the vent pipe is fixedly connected and communicated with the external thread pipe through the pipe joint nut, of course, one end of the vent pipe 3 can also be fixedly arranged on the oil injection screw type vacuum pump host 1 through flange connection and is communicated with the cavity of the oil injection screw type vacuum pump host 1, and the other end of the vent pipe 3 is fixedly connected with the cavity of the oil-gas separation device 2 through flange connection.
The working principle of the invention is that the first embodiment is taken as an example. The breather pipe is communicated with the cavity of the oil injection screw type vacuum pump host and the cavity of the oil-gas separation device, when the oil injection screw type vacuum pump starts vacuumizing, the cavity of the oil injection screw type vacuum pump host is in negative pressure (low vacuum in the starting stage), the cavity of the oil injection screw type vacuum pump spouts gas to the cavity of the oil-gas separation device through the breather pipe, after the cavity of the oil injection screw type vacuum pump host is in high vacuum, raw material gas in the oil-gas separation device is largely introduced into the cavity of the oil injection screw type vacuum pump host, and the faults of vibration and noise increase of the oil injection screw type vacuum pump are avoided.
Compared with the traditional air supplementing device, the air supplementing device of the oil injection screw type vacuum pump provided by the invention omits equipment such as air filtration, electromagnetic valves, one-way valves and the like, has a simple structure and few parts, and therefore, has the advantages of extremely high reliability, extremely low manufacturing cost and wide market application prospect.
Claims (9)
1. The application method of the oil injection screw type vacuum pump air supplementing device comprises the step of an oil injection screw type vacuum pump main machine (1), and is characterized in that: still include oil-gas separation device (2), fixed breather pipe (3) that is equipped with on oil injection screw vacuum pump host computer (1), the one end of breather pipe (3) and the quick-witted chamber intercommunication of oil injection screw vacuum pump host computer (1), the other end of breather pipe (3) with the inner chamber intercommunication of oil-gas separation device (2), be located the fluid face top of oil-gas separation device (2), the application method is: and in the stage of starting the air suction of the oil injection screw type vacuum pump main machine, the oil injection screw type vacuum pump main machine is in low vacuum, the cavity of the oil injection screw type vacuum pump main machine is used for jetting air to the inner cavity of the oil-gas separation device through the vent pipe, and after the oil injection screw type vacuum pump main machine is in high vacuum, raw material gas in the oil-gas separation device is used for feeding air to the cavity of the oil injection screw type vacuum pump main machine.
2. The method for using the oil-injection screw type vacuum pump air supplementing device according to claim 1, wherein the method comprises the following steps: the breather pipe (3) adopts a hard pipeline.
3. The method for using the oil-injection screw type vacuum pump air supplementing device according to claim 1, wherein the method comprises the following steps: the vent pipe (3) adopts a soft pipeline.
4. The method for using the oil-injection screw type vacuum pump air supplementing device according to claim 1, wherein the method comprises the following steps: the vent pipe (3) is formed by connecting at least one section of hard pipeline and at least one section of soft pipeline.
5. The method for using the oil-injection screw type vacuum pump air supplementing device according to claim 2 or 4, wherein the method comprises the following steps: the hard pipeline is copper pipe or iron pipe or steel pipe or aluminum pipe.
6. The method for using the oil-injection screw type vacuum pump air supplementing device according to claim 3 or 4, wherein the method comprises the following steps: the soft pipeline is an oil-resistant cloth-added rubber pipe, an oil-resistant spiral rubber pipe or an oil-conveying steel wire braided rubber pipe.
7. The method for using the oil-injection screw type vacuum pump air supplementing device according to claim 1, wherein the method comprises the following steps: the oil-gas separation device (2) is an oil-gas separation device with an oil injection screw type vacuum pump, or the oil-gas separation device (2) is an independently arranged oil-gas separation device.
8. The method for using the oil-injection screw type vacuum pump air supplementing device according to claim 1, wherein the method comprises the following steps: one end of the vent pipe (3) is fixed on the oil injection screw type vacuum pump host machine (1) through a pipe joint nut and is communicated with a machine cavity of the oil injection screw type vacuum pump host machine (1), and the other end of the vent pipe (3) is fixed on the oil-gas separation device (2) through the pipe joint nut and is communicated with an inner cavity of the oil-gas separation device (2).
9. The method for using the oil-injection screw type vacuum pump air supplementing device according to claim 1, wherein the method comprises the following steps: one end of the vent pipe (3) is fixedly arranged on the oil injection screw type vacuum pump host machine (1) through flange connection and is communicated with a machine cavity of the oil injection screw type vacuum pump host machine (1), and the other end of the vent pipe (3) is fixedly arranged on the oil-gas separation device (2) through flange connection and is communicated with an inner cavity of the oil-gas separation device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811008290.9A CN108825503B (en) | 2018-08-31 | 2018-08-31 | Air supplementing device of oil injection screw type vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811008290.9A CN108825503B (en) | 2018-08-31 | 2018-08-31 | Air supplementing device of oil injection screw type vacuum pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108825503A CN108825503A (en) | 2018-11-16 |
| CN108825503B true CN108825503B (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811008290.9A Active CN108825503B (en) | 2018-08-31 | 2018-08-31 | Air supplementing device of oil injection screw type vacuum pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN108825503B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814900B (en) * | 2020-12-31 | 2023-03-24 | 浙江创为真空设备股份有限公司 | Screw pump exhaust pressure stabilizing structure |
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| CN206987906U (en) * | 2017-07-24 | 2018-02-09 | 智宝旦 | Turbocharger with machine oil leakage-resistant device |
| CN107575385A (en) * | 2017-09-04 | 2018-01-12 | 江苏成科新能源有限公司 | A kind of scroll compressor of automobile air conditioner |
| CN208634038U (en) * | 2018-08-31 | 2019-03-22 | 重庆开山压缩机有限公司 | The making-up air device of exhaust end base of oil injection threaded bolt formula vacuum pump |
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| CN108825503A (en) | 2018-11-16 |
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