CN218882522U - Screw air compressor - Google Patents
Screw air compressor Download PDFInfo
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- CN218882522U CN218882522U CN202220342340.2U CN202220342340U CN218882522U CN 218882522 U CN218882522 U CN 218882522U CN 202220342340 U CN202220342340 U CN 202220342340U CN 218882522 U CN218882522 U CN 218882522U
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Abstract
The utility model relates to an air compressor machine technical field especially relates to a screw air compressor machine. In order to avoid the danger of liquid impact generated during the secondary starting of the screw air compressor, the utility model provides the screw air compressor, which comprises a compression main machine and an oil gas cylinder, wherein an exhaust hole of the compression main machine is communicated with an air inlet of the oil gas cylinder through an exhaust pipe, and an oil injection port of the compression main machine is communicated with an oil discharge port at the bottom of the oil gas cylinder through an oil return pipe; an oil pump close to an oil injection port of the compression main machine is arranged on the oil return pipe, and when the compression main machine is started, the oil pump starts to work; when the compression main machine stops, the oil pump stops working. The screw air compressor of the utility model is provided with the oil pump on the oil return pipe, when the compression host is started, the compression host can be rapidly cooled, and the service life of the screw air compressor is prolonged; when the compression main machine is stopped, the lubricating oil can be effectively reduced from entering the compression main machine, the oil pressure in the oil return pipe is released in a clearance mode, and the danger that the screw air compressor generates liquid impact when the screw air compressor is started for the second time is avoided.
Description
Technical Field
The utility model relates to an air compressor machine technical field especially relates to a screw air compressor machine.
Background
With the continuous development of economy, medium-high pressure air compressors are used in many industries, such as the laser cutting industry, the blow molding industry and other manufacturing industries requiring medium-high pressure air. At present, a screw type air compressor is a common medium-high pressure air compressor, but the screw type air compressor has the following problems:
1. when the engine is stopped, lubricating oil in the pipeline flows back into the compression main engine, so that the danger of liquid impact is easily caused when the compression main engine is started for the second time, the surface of a rotor is abraded, and the instant oil stain is high;
2. the screw is soaked in the lubricating oil for a long time, so that the surface of the screw is easily corroded and damaged, and the service life of the screw air compressor is influenced;
3. the lubricating oil in the compression main machine has high viscosity and resistance, so that the compression main machine has overlarge torque when being started, and the driving motor is easy to burn due to overlarge instantaneous current when being started, and the service life of the screw air compressor is influenced.
SUMMERY OF THE UTILITY MODEL
In order to avoid the danger of liquid impact generated when the screw type air compressor is started for the second time, the utility model provides a screw type air compressor, which comprises a compression main machine and an oil cylinder, wherein the exhaust hole of the compression main machine is communicated with the air inlet of the oil cylinder through an exhaust pipe, and the oil injection hole of the compression main machine is communicated with the oil discharge hole at the bottom of the oil cylinder through an oil return pipe; the oil return pipe is provided with an oil pump, the oil pump is close to an oil injection port of the compression host, and when the compression host is started, the oil pump starts to work; when the compression main engine stops, the oil pump stops working. The utility model discloses screw air compressor machine sets up the oil pump on returning oil pipe to make the oil pump begin to work when the compression host computer starts, make the oil pump stop work when the compression host computer shuts down. Therefore, when the compression host is started, the lubricating oil in the oil return pipe can be directly pressed into the compression host by the oil pump, so that the effects of quickly cooling and lubricating the compression host can be achieved, and the service life of the screw air compressor of the utility model is prolonged; when the compression main machine is stopped, the oil pump stops working along with the compression main machine, so that lubricating oil in the oil return pipe can be effectively reduced to enter the compression main machine, meanwhile, oil pressure in the oil return pipe can be released through a gap in the oil pump, and the danger of liquid impact of the screw air compressor during secondary starting is avoided.
Preferably, the oil pump is a gear pump or a screw pump. Therefore, the gear pump or the screw pump is adopted as the oil pump, and the selection is simple and convenient.
Preferably, a first oil filter and a second oil filter are arranged on the oil return pipe, the first oil filter is located between the oil pump and the compression main machine, and the second oil filter is located between the oil pump and the oil cylinder. Therefore, the second oil filter is arranged at the front end of the oil pump, so that the lubricating oil entering the oil pump can be filtered, and the situation that impurities in the lubricating oil enter the oil pump to damage the oil pump is avoided; set up the second oil filter at the front end of the nozzle of compressor mainframe, can filter the lubricating oil that enters into the compressor mainframe, avoid impurity in the lubricating oil to enter into the compressor mainframe, cause the damage to the compressor mainframe, influence the life of compressor mainframe. Further, the second oil filter is a Y-shaped filter. Therefore, when the Y-shaped filter is used for filtering the lubricating oil entering the oil pump, impurities generated by filtering can be precipitated in the impurity precipitation end of the Y-shaped filter, and the filtered impurities can be conveniently discharged by a user.
Preferably, a first check valve is arranged on the exhaust pipe, and an air inlet of the first check valve is close to an air outlet of the compression main machine. Therefore, the first check valve is arranged at the exhaust port of the compression main machine, so that lubricating oil in the exhaust pipe can be prevented from flowing back into the compression main machine when the compression main machine is stopped, excessive oil accumulation of the lubricating oil in the compression main machine is avoided, and the danger of liquid impact during secondary starting of the screw air compressor can be avoided; the screw can be prevented from being soaked in the lubricating oil for a long time, so that the surface of the screw can be prevented from being damaged due to the corrosion of the lubricating oil for a long time, and the service life of the screw air compressor of the utility model is prolonged; can avoid the moment of torsion that leads to the compression host computer when starting greatly because of the viscosity and the resistance of lubricating oil too big, thereby can avoid the utility model discloses drive motor among the screw air compressor burns out, prolongs because of the too big electric current in the twinkling of an eye when starting the utility model discloses screw air compressor's life.
Preferably, a second one-way valve is arranged on the oil return pipe, and an inlet of the second one-way valve is close to an oil discharge port of the oil cylinder. Like this, set up the second check valve in oil drain port department of oil gas section of thick bamboo, can prevent the utility model discloses when screw air compressor machine shut down, return the lubricating oil among the oil pipe and flow back to in the oil gas section of thick bamboo, lead to the long-pending oil of lubricating oil in the oil gas section of thick bamboo too much, thereby lead to the utility model discloses screw air compressor machine is when the secondary start because of the too high splash of the lubricating oil level in the oil gas section of thick bamboo, strikes the thin separator position of oil on oil gas section of thick bamboo upper portion, and then leads to the utility model discloses screw air compressor machine appears the oil leakage problem.
Preferably, a temperature control valve is arranged on the oil return pipe, an oil inlet of the temperature control valve is communicated with an outlet of the second one-way valve, a low-temperature oil outlet of the temperature control valve is communicated with an inlet of the second oil filter through a first oil return branch pipe, a high-temperature oil outlet of the temperature control valve is communicated with an inlet of the second oil filter through a second oil return branch pipe, and a cooler is arranged on the second oil return branch pipe. Therefore, when the oil temperature of the lubricating oil obtained by separating the oil cylinder and the gas cylinder is lower, the lubricating oil can directly enter the compression main machine through the oil pump; when the oil temperature of the lubricating oil obtained by separation in the oil cylinder is high, the lubricating oil with high temperature can be shunted to the cooler by using the temperature control valve for cooling, and the lubricating oil enters the compression main machine through the oil pump after the cooling is finished. Therefore, the utility model discloses set up temperature-sensing valve and cooler on returning oil pipe, can shunt the cooling to the too high lubricating oil of oil temperature, avoid the too high lubricating oil of oil temperature directly to enter into the compression host computer in, influence the cooling and the lubricated effect of lubricating oil. Further, the cooler is an oil-gas cooler, and an air inlet of the oil-gas cooler is communicated with a compression exhaust port of the oil gas cylinder through a compression exhaust pipe. Like this, adopt oil gas cooler as the cooler, can cool off lubricating oil and oil cylinder exhaust compressed gas simultaneously to can simplify the utility model discloses screw air compressor's structure reduces the utility model discloses screw air compressor's manufacturing and maintenance cost.
Preferably, a pressure maintaining valve is provided on the compression exhaust pipe, and the pressure maintaining valve is adjacent to a compression exhaust port of the oil gas cylinder. Therefore, the utility model discloses screw air compressor machine operation in-process, usable pressure maintains the pressure in the valve keeps the oil cylinder and prevents the compressed gas backward flow of oil cylinder output.
Preferably, an oil return port of the compression main machine is communicated with the oil fine separator in the oil cylinder through a secondary oil return pipe, an oil return one-way valve and an oil return filter are arranged on the secondary oil return pipe, and the oil return one-way valve is located between the oil return filter and the compression main machine. Thus, the utility model discloses screw air compressor machine accessible secondary returns oil pipe makes during lubricating oil in the oil fine separator enters into the compression host computer, and usable return oil filter filters lubricating oil simultaneously, avoids the impurity in the lubricating oil to cause the damage to the compression host computer in entering into the compression host computer.
Drawings
Fig. 1 is the structural schematic diagram of the screw air compressor of the utility model.
Detailed Description
The screw air compressor of the present invention will be described in detail with reference to fig. 1.
As shown in figure 1, the screw air compressor of the utility model comprises a compression main machine 1 and an oil cylinder 2. The compression main unit 1 preferably adopts a two-stage compression main unit which is energy-saving, power-saving and high in volumetric efficiency. An exhaust hole of the compression main machine 1 is communicated with an air inlet of the oil cylinder 2 through an exhaust pipe 3, and an oil spray port of the compression main machine 1 is communicated with an oil discharge port at the bottom of the oil cylinder 2 through an oil return pipe 4; the oil return pipe 4 is provided with an oil pump 5, the oil pump 5 is close to an oil injection port of the compression main machine 1, and when the compression main machine 1 is started, the oil pump 5 starts to work; when the compression main unit 1 is stopped, the oil pump 5 stops operating. The utility model discloses screw air compressor machine sets up oil pump 5 on returning oil pipe 4 to make oil pump 5 begin to work when compression host computer 1 starts, make oil pump 5 stop work when compression host computer 1 stops. Thus, when the compression main machine 1 is started, the lubricating oil in the oil return pipe 4 can be directly pressed into the compression main machine 1 by the oil pump 5, so that the effects of quickly cooling and lubricating the compression main machine 1 can be achieved, and the service life of the screw air compressor of the utility model is prolonged; when the compression main machine 1 is stopped, the oil pump 5 stops working, so that the lubricating oil in the oil return pipe 4 can be effectively reduced to enter the compression main machine 1, meanwhile, the oil pressure in the oil return pipe 4 can be released through a gap in the oil pump 5, and the danger of liquid impact of the screw air compressor during secondary starting is avoided. Preferably, the oil pump 5 is a gear pump or a screw pump. Like this, adopt gear pump or screw pump as oil pump 5, select simple and conveniently. Preferably, a first oil filter 6 and a second oil filter 7 are arranged on the oil return pipe 4, the first oil filter 6 is located between the oil pump 5 and the compression main machine 1, and the second oil filter 7 is located between the oil pump 5 and the oil gas cylinder 2. Thus, the second oil filter 7 is arranged at the front end of the oil pump 5, so that the lubricating oil entering the oil pump 5 can be filtered, and impurities in the lubricating oil are prevented from entering the oil pump 5 to damage the oil pump 5; set up second oil filter 7 at the front end of the nozzle of compressor 1, can filter the lubricating oil that enters into compressor 1, avoid impurity in the lubricating oil to enter into compressor 1, cause the damage to compressor 1, influence compressor 1's life. Preferably, the second oil filter 7 is a Y-filter. Therefore, when the Y-shaped filter is used for filtering the lubricating oil entering the oil pump, impurities generated by filtering can be precipitated in the impurity precipitation end of the Y-shaped filter, and the filtered impurities can be conveniently discharged by a user.
As shown in fig. 1, the exhaust pipe 3 is provided with a first check valve 8, and an intake port of the first check valve 8 is close to an exhaust port of the compression main 1. In this way, the first check valve 8 is arranged at the exhaust port of the compression main machine 1, so that the lubricating oil in the exhaust pipe 3 can be prevented from flowing back to the compression main machine 1 when the compression main machine 1 stops, the excessive oil accumulation of the lubricating oil in the compression main machine 1 is avoided, and the danger of liquid impact of the screw air compressor of the utility model during secondary starting can be further avoided; the screw can be prevented from being soaked in the lubricating oil for a long time, so that the surface of the screw can be prevented from being damaged due to the corrosion of the lubricating oil for a long time, and the service life of the screw air compressor of the utility model is prolonged; can avoid the big moment of torsion that leads to the compression host computer when starting because of the viscosity of lubricating oil and resistance is too big, thereby can avoid the utility model discloses too big burnout of drive motor in the screw air compressor because of the instantaneous current when starting, the extension the utility model discloses screw air compressor's life.
As shown in fig. 1, the oil return pipe 4 is provided with a second check valve 9, and an inlet of the second check valve 9 is close to an oil discharge port of the oil cylinder 2. Like this, set up second check valve 9 in oil drain port department of oil gas section of thick bamboo 2, can prevent the utility model discloses when screw air compressor shuts down, return the lubricating oil reflux in oil pipe 4 to the oil gas section of thick bamboo 2 in, lead to the long-pending oily excessive quantity of lubricating oil in the oil gas section of thick bamboo 2, thereby lead to the utility model discloses screw air compressor is because of the too high splash of lubricating oil level in the oil gas section of thick bamboo 2 when the secondary start, strikes the oily fine separator 21 position on 2 upper portions of oil gas section of thick bamboo, and then leads to the utility model discloses the oil problem of running appears in screw air compressor. Preferably, a temperature control valve 10 is arranged on the oil return pipe 4, an oil inlet of the temperature control valve 10 is communicated with an outlet of the second one-way valve 9, a low-temperature oil outlet of the temperature control valve 10 is communicated with an inlet of the second oil filter 7 through a first oil return branch pipe 41, a high-temperature oil outlet of the temperature control valve 10 is communicated with an inlet of the second oil filter 7 through a second oil return branch pipe 42, and a cooler 11 is arranged on the second oil return branch pipe 42. Therefore, when the temperature of the lubricating oil obtained by separating the oil cylinder 2 is lower, the lubricating oil can directly enter the compression main machine 1 through the oil pump 5; when the temperature of the lubricating oil separated from the oil cylinder 2 is high, the high-temperature lubricating oil can be branched to the cooler 11 by the temperature control valve 10 for cooling, and enters the compression main machine 1 through the oil pump 5 after cooling. Therefore, the utility model discloses set up temperature-sensing valve 10 and cooler 11 on returning oil pipe, can shunt the cooling to the too high lubricating oil of oil temperature, avoid the too high lubricating oil of oil temperature directly to enter into compression host computer 1 in, influence the cooling and the lubricated effect of lubricating oil. Preferably, the cooler 11 is an oil gas cooler, and an air inlet of the oil gas cooler is communicated with a compression exhaust port of the oil gas cylinder 2 through a compression exhaust pipe 12. Like this, adopt oil gas cooler as cooler 11, can cool off lubricating oil and 2 exhaust compressed gas of oil gas section of thick bamboo simultaneously to can simplify the utility model discloses screw air compressor's structure reduces the utility model discloses screw air compressor's manufacturing and maintenance cost. Preferably, the compression discharge pipe 12 is provided with a pressure maintaining valve 13, and the pressure maintaining valve 13 is located near a compression discharge port of the cylinder 2. Thus, in the operation of the screw type air compressor of the present invention, the pressure maintaining valve 13 can be used to maintain the pressure in the oil and gas cylinder 2 and prevent the compressed gas output from the oil and gas cylinder 2 from flowing back.
As shown in fig. 1, the oil return port of the compression main unit 1 is communicated with the oil fine separator 21 in the oil cylinder 2 through a secondary oil return pipe 14, the secondary oil return pipe 14 is provided with an oil return check valve 15 and an oil return filter 16, and the oil return check valve 15 is located between the oil return filter 16 and the compression main unit 1. Thus, the utility model discloses screw air compressor machine accessible secondary returns oil pipe 14 and makes the lubricating oil in the thin separator of oil 21 enter into compression host computer 1, and usable return oil filter 16 filters lubricating oil simultaneously, avoids the impurity in the lubricating oil to enter into compression host computer 1 in to cause the damage to compression host computer 1.
Claims (10)
1. A screw air compressor is characterized by comprising a compression main machine and an oil cylinder, wherein an exhaust hole of the compression main machine is communicated with an air inlet of the oil cylinder through an exhaust pipe, and an oil spray port of the compression main machine is communicated with an oil discharge port at the bottom of the oil cylinder through an oil return pipe; the oil return pipe is provided with an oil pump, the oil pump is close to an oil injection port of the compression host, and when the compression host is started, the oil pump starts to work; when the compression host is stopped, the oil pump stops working.
2. The screw air compressor of claim 1, wherein said oil pump is a gear pump or a screw pump.
3. The screw air compressor of claim 1 or 2, wherein a first oil filter and a second oil filter are disposed on the oil return pipe, the first oil filter is located between the oil pump and the compression main machine, and the second oil filter is located between the oil pump and the oil cylinder.
4. The screw air compressor of claim 3, wherein said second oil filter is a Y-shaped filter.
5. The screw air compressor of claim 3, wherein the exhaust pipe is provided with a first check valve, and an inlet of the first check valve is close to an outlet of the compression main machine.
6. The screw air compressor of claim 3, wherein a second check valve is disposed on the oil return pipe, and an inlet of the second check valve is close to an oil discharge port of the oil cylinder.
7. The screw air compressor of claim 6, wherein a thermostatic valve is disposed on the oil return pipe, an oil inlet of the thermostatic valve is communicated with an outlet of the second check valve, a low-temperature oil outlet of the thermostatic valve is communicated with an inlet of the second oil filter through a first oil return branch pipe, a high-temperature oil outlet of the thermostatic valve is communicated with an inlet of the second oil filter through a second oil return branch pipe, and a cooler is disposed on the second oil return branch pipe.
8. The screw air compressor of claim 7, wherein the cooler is an oil-gas cooler, and an air inlet of the oil-gas cooler is communicated with a compression exhaust port of the oil-gas cylinder through a compression exhaust pipe.
9. The screw air compressor of claim 8, wherein a pressure maintaining valve is provided on said compression exhaust pipe, and said pressure maintaining valve is located near a compression exhaust port of said oil cylinder.
10. The screw air compressor of claim 3, wherein an oil return port of the compression main unit is communicated with an oil fine separator in the oil cylinder through a secondary oil return pipe, an oil return one-way valve and an oil return filter are arranged on the secondary oil return pipe, and the oil return one-way valve is positioned between the oil return filter and the compression main unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220342340.2U CN218882522U (en) | 2022-02-21 | 2022-02-21 | Screw air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220342340.2U CN218882522U (en) | 2022-02-21 | 2022-02-21 | Screw air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218882522U true CN218882522U (en) | 2023-04-18 |
Family
ID=85947429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220342340.2U Active CN218882522U (en) | 2022-02-21 | 2022-02-21 | Screw air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218882522U (en) |
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2022
- 2022-02-21 CN CN202220342340.2U patent/CN218882522U/en active Active
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