A single screw supercharger

Abstract

The present invention relates to the technical field of screw superchargers, specifically a single screw supercharger, including an air filter, an unloading valve, a main engine, and a gas-liquid separator. The air filter and the unloading valve are connected via an air guide pipe, the unloading valve is connected to the air inlet end of the main engine, the air inlet at the upper end of the gas-liquid separator is connected to the unloading shutdown venting channel, the end of the unloading shutdown venting channel is divided into an unloading pressure maintaining regulating circuit and a main engine unloading air supply circuit, the unloading pressure maintaining regulating circuit is connected to the air guide pipe, the main engine unloading air supply circuit is connected to the main engine, the air inlet pipe of the air filter is provided with a pressure regulating valve and an electric valve, the electric valve is located at the rear end of the pressure regulating valve, the electric valve is controlled by an electric signal, the unloading valve is a pneumatic valve, the coolant outlet of the gas-liquid separator is connected to the main engine through a liquid circuit, and the liquid circuit is provided with a liquid cooler, a liquid filter, and a water cut-off solenoid valve. The advantages are that the supercharger is energy-saving, frequent shutdowns are avoided, and system reliability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of screw superchargers, in particular to a single screw supercharger. Background Art

[0002] Existing superchargers are often piston machine structures. The scraper ring and crankshaft of the piston machine are two important structures in its internal structure. Due to the existence of the scraper ring and crankshaft structure, the cylinder is prone to wear and the piston ring is damaged, resulting in gas leakage, increased energy consumption, or insufficient gas supply. Therefore, the piston machine needs to be frequently repaired, the maintenance work is large and the cycle is long. At the same time, the maintenance cost is extremely high, which affects the work use. The crankshaft structure vibrates greatly, the gas temperature is high, and a special foundation is required to buffer the vibration and consolidate the use. In addition, due to the low piston speed, high-pressure gas is prone to pulse vibration. The lubrication of the piston box is achieved by lubricating oil or grease. After long-term use, these lubricants will gradually consume or deteriorate and need to be replaced. In addition, the existing pistons are not treated with anti-corrosion and are not suitable for use in environments with corrosive process gases. The current high-pressure pistons are basically water-cooled structures, mainly using water to cool high-temperature cylinders, and basically no air-cooled type, which is restricted to use below zero degrees in northern winter.

[0003] Bottle blowing, air tightness testing, and tire production are common links in industrial production. In these two processes, gases with air pressure and energy are often released. Since these gases have energy, they can be repeatedly pressurized and used to achieve the goal of effective use of clean energy. In order to achieve the above goals and solve the shortcomings of existing products, it is necessary to fill in blank products or add more superchargers. The existing superchargers lack a pressure regulating valve, which leads to excessive intake pressure, easily causing overload, damage to the compressor or motor, or frequent alarm shutdown, affecting the normal use of the machine, and the shutdown air is directly discharged into the atmosphere, wasting energy and even polluting the air. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a single-screw supercharger that is energy-saving, avoids frequent shutdowns, improves system reliability, can share a venting circuit to adjust the vacuum degree of the main engine when unloading, is suitable for a variety of gases, has less vibration, longer service life, lower consumables and maintenance costs, is more energy-saving, and is suitable for air cooling or water cooling.

[0005] The present invention is realized through the following technical scheme: a single-screw supercharger, comprising an air filter, an unloading valve, a main engine, and a gas-liquid separator, wherein the air filter and the unloading valve are connected via an air guide pipe, the unloading valve is connected to the air inlet end of the main engine, the air inlet at the upper end of the gas-liquid separator is connected to an unloading shutdown venting channel, an unloading shutdown venting solenoid valve is provided on the unloading shutdown venting channel, the end of the unloading shutdown venting channel is divided into two paths, one is an unloading pressure maintaining regulating circuit, and the other is a main engine unloading air supply circuit, the unloading pressure maintaining regulating circuit is connected to the air guide pipe, so an unloading pressure maintaining regulating hole is provided on the unloading pressure maintaining regulating circuit, and the main engine unloading air supply circuit is connected to The host and the air filter are provided with a pressure regulating valve and an electric valve on the air inlet pipe. The electric valve is located at the rear end of the pressure regulating valve and is controlled by an electrical signal to perform a slow opening and closing action and stepless displacement adjustment. The unloading valve is a pneumatic valve that performs a fast opening and closing action. The coolant outlet of the gas-liquid separator is connected to the host through a liquid circuit. The liquid circuit is provided with a liquid cooler, a liquid filter, and a water cut-off solenoid valve in sequence according to the liquid flow direction, and the liquid filter is inverted. A filter element for filtering impurities is provided on the lower inner side of the liquid filter, and an air bag structure for shock absorption and pulse absorption is provided on the upper inner side of the liquid filter. An exhaust valve is provided on the liquid filter.

[0006] Furthermore: a pressure one-way valve is arranged at the rear end of the unloading pressure-maintaining regulating hole, and the flow direction of the pressure one-way valve is from the unloading shutdown venting channel to the air guide pipe.

[0007] Furthermore: a precooling cooler is arranged on the air inlet pipe of the air filter, and the precooling cooler is located between the electric valve and the air inlet of the air filter.

[0008] Furthermore: a bypass air intake pipe is connected between the air guide pipe and the air intake end of the main engine, and a bypass solenoid valve is arranged on the bypass air intake pipe.

[0009] Furthermore: an intake valve switch channel is provided between the unloading valve and the air guide pipe, and a loading and unloading solenoid valve is provided on the intake valve switch channel.

[0010] Furthermore: an intake valve control switch channel is provided between the unloading valve and the unloading shutdown venting channel, and a loading and unloading solenoid valve and a pressure reducing valve are provided on the intake valve control switch channel.

[0011] Furthermore: the unloading valve is connected to an external air source via a control air intake valve switch channel, and a loading and unloading solenoid valve is arranged on the control air intake valve switch channel.

[0012] Furthermore: a discharge channel is branched out from the unloading pressure-maintaining regulating circuit, and the discharge channel is used to discharge the vented gas into the atmosphere. A venting throttle hole and a venting muffler are provided on the discharge channel.

[0013] Furthermore: a host shutdown pressure relief circuit is connected between the air inlet end of the host and the air duct, and a shutdown pressure relief valve and a pressure relief check valve are arranged on the host shutdown pressure relief circuit, and the flow direction of the pressure relief check valve is from the host to the air duct.

[0014] Furthermore: it also includes a manual drain valve, which is arranged on the unloading and shutdown drain channel, and the manual drain valve is located at the front end of the unloading and draining solenoid valve.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention recovers the gas released from bottle blowing, air tightness test and the like, pressurizes it and reuses it, so as to achieve energy saving effect. For example, in the air separation industry, low-pressure air is first used to separate nitrogen or oxygen, and the required gas is pressurized. If nitrogen is needed, only the nitrogen is pressurized, so that only part of the gas is compressed, which saves energy more obviously, instead of directly compressing the whole air to the required pressure and then separating it. The existing product has high intake pressure and the upper pressure limit is uncontrollable. The present invention adds a pressure regulating valve, which is used to control the high pressure to prevent the intake pressure from being too high, so as to avoid frequent protection shutdown. The electric valve and the unloading valve are used together, so that they are opened slowly to avoid gas. The impact of body pulses can effectively improve the reliability of the system. It can be closed quickly when closed to avoid system overpressure, effectively reduce the action of the safety valve, and ensure that the system works under safe pressure. An efficient venting circuit is set according to different gases, which not only does not waste resources when venting high-pressure gas, but also effectively controls the vacuum degree of the machine head, and does not exhaust harmful gases to pollute the atmosphere. Through the bypass intake pipe, under the premise of good sealing of the unloading valve, effective air replenishment is achieved, and the solenoid valve acts once each when it is opened and stopped, which effectively improves the reliability of the solenoid valve. The liquid filter is set upside down, and a filter element is set on the lower side of the liquid filter, and a filter element is set on the upper side of the liquid filter. An airbag structure is set up so that the liquid filter forms a pulse damper, which is effectively combined with the damping structure to effectively reduce the pulse vibration of the liquid circuit system and improve the reliability of the system; when the conventional air booster is used, the present invention branches out a discharge channel at the unloading pressure maintaining regulation circuit, and discharges the vented gas into the atmosphere through the discharge channel. Under the action of the discharge channel, the internal pressure of the main engine after shutdown can be released to a level equivalent to the atmospheric pressure, so that the next time the main engine is started, it can be started with a light load without the effect of internal pressure, reducing the starting current of the motor to avoid overload shutdown failure; in addition, when the process gas booster is used, the main engine is set to shut down The pressure relief valve and the pressure relief check valve are used to return the high-pressure gas in the main engine to the gas source to reduce the internal pressure of the main engine so that the main engine can be started with light load next time. A manual drain valve is set before the unloading control solenoid valve to release the system pressure during maintenance and inspection. The single screw has the characteristics of force balance, less vibration, no vulnerable parts with short life, long service life, less gas attenuation, more energy saving, and a large pressure ratio, which can be from 2 to 10 or higher. It requires fewer compression stages and can be made into oil-containing models or oil-free models. The oil-free model can use water as liquid to achieve environmental protection. It uses stainless steel materials and can be used for corrosive media. In general, the single screw high-pressure booster has obvious comprehensive advantages and is a good choice, which is suitable for the needs of today's era of energy-saving and environmental development. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of Embodiment 2 and Embodiment 3 of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of Embodiment 4 of the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of Embodiment 5 and Embodiment 6 of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of Embodiment 7 of the present invention;

[0021] Figure 5 It is a schematic structural diagram of the liquid filter of the present invention.

[0022] Explanation of the reference numerals: 1-air filter, 2-unloading valve, 3-host, 4-gas-liquid separator, 5-air guide pipe, 6-unloading shutdown vent channel, 7-unloading vent solenoid valve, 8-unloading pressure maintaining regulating circuit, 9-host unloading air supply circuit, 10-unloading pressure maintaining regulating hole, 11-pressure regulating valve, 12-electric valve, 13-liquid circuit, 14-liquid cooler, 15-liquid filter, 16-water cut-off solenoid valve, 17-filter element, 18-air bag Structure, 19-exhaust valve, 20-pressure check valve, 21-precooling cooler, 22-bypass intake pipe, 23-bypass solenoid valve, 24-discharge channel, 25-vent throttle hole, 26-vent muffler, 27-return throttle hole, 28-control intake valve switch channel, 29-loading and unloading solenoid valve, 30-pressure reducing valve, 31-main engine shutdown pressure relief circuit, 32-shutdown pressure relief valve, 33-pressure relief check valve, 34-manual drain valve. DETAILED DESCRIPTION

[0023] The single-screw supercharger is now divided into seven embodiments for detailed description of two major technical solutions using process gas and air-type gas. However, since different embodiments have the same structure, in order to avoid the problem of excessive duplication and redundancy of content, the embodiment is disassembled and the same parts are listed separately for segmented description. In the subsequent structure, the repeated parts are directly quoted, and the segmented structures are connected in series to form one or more relatively independent and complete structural solutions or complete embodiments.

[0024] Embodiment 1, shared, a single screw supercharger, including an air filter 1, an unloading valve 2, a main engine 3, and a gas-liquid separator 4, the air filter 1 and the unloading valve 2 are connected by an air guide pipe 5, the unloading valve 2 is connected to the air inlet end of the main engine 3, the air inlet at the upper end of the gas-liquid separator 4 is connected to the unloading shutdown venting channel 6, and the unloading shutdown venting channel 6 is provided with an unloading venting solenoid valve 7, the end of the unloading shutdown venting channel 6 is divided into two paths, one is an unloading pressure maintaining regulating circuit 8, and the other is a main engine unloading air supply circuit 9, the unloading pressure maintaining regulating circuit 8 is connected to the air guide pipe 5, and the unloading pressure maintaining regulating circuit 8 is provided with an unloading pressure maintaining regulating hole 10, the main engine unloading air supply circuit 9 is connected to the main engine 3, the inlet of the air filter 1 A pressure regulating valve 11 and an electric valve 12 are arranged on the air pipe. The electric valve 12 is located at the rear end of the pressure regulating valve 11, and the electric valve 12 is controlled by an electrical signal to perform slow opening and closing actions and stepless displacement adjustment. The unloading valve 2 is a pneumatic valve that performs fast opening and closing actions. The coolant outlet of the gas-liquid separator 4 is connected to the main engine 3 through a liquid circuit 13. A liquid cooler 14, a liquid filter 15, and a water cut-off solenoid valve 16 are arranged on the liquid circuit 13 in sequence according to the liquid flow direction, and the liquid filter 15 is arranged inverted. A filter element 17 for filtering impurities is arranged on the lower side of the interior of the liquid filter 15, and an air bag structure 18 for shock absorption and pulse absorption is arranged on the upper side of the interior of the liquid filter 15. An exhaust valve 19 is arranged on the liquid filter 15.

[0025] A pressure one-way valve 20 is provided at the rear end of the unloading pressure-maintaining regulating hole 10 , and the flow direction of the pressure one-way valve 20 is from the unloading shutdown venting channel 6 to the air guide pipe 5 .

[0026] A precooling cooler 21 is provided on the air inlet pipe of the air filter 1 , and the precooling cooler 21 is located between the electric valve 12 and the air inlet of the air filter 1 .

[0027] A bypass air intake pipe 22 is connected between the air guide pipe 5 and the air intake end of the main engine 3 , and a bypass solenoid valve 23 is provided on the bypass air intake pipe 22 .

[0028] A pressure regulating valve 11 is set at the air inlet end, and the air pressure after the valve is used as a signal source to adjust the air inlet pressure. When the air inlet source pressure is greater than the set pressure, it will automatically adjust to the set pressure value and then pass. The set pressure value is set according to user needs, generally 0.8MPA or 1MPA; when the air inlet source pressure is less than or equal to the set pressure, it can pass through completely, so as to effectively prevent the air inlet pressure from being too high, causing the host load to be too large, the motor current to be too large, reaching the alarm value, causing frequent shutdowns, and affecting the normal use of the machine. The high air inlet pressure and the unchanged exhaust pressure, although the pressure ratio is reduced, which can reduce energy consumption, but the pressure increase will bring about an increase in gas volume, thereby increasing more energy consumption, so it is easy to cause overload, so choosing an automatic pressure regulating valve 11 can effectively solve this problem.

[0029] An electric valve 12 and an unloading valve 2 are set at the air inlet end. The electric valve 12 is controlled by an electrical signal to perform a slow opening and closing action and stepless displacement adjustment. The unloading valve 2 is a pneumatic valve that performs a fast opening and closing action. When opened, the electric valve 12 and the unloading valve 2 receive signals at the same time. Since the electric valve 12 opens slowly, it can effectively prevent the impact of the sudden high-pressure air intake. The air pressure of the system is gradually increased. At the same time, due to the slow increase in load, the motor current slowly increases, and the impact on the motor is small, which improves the reliability of the machine and reduces the risk of exploded parts. When closed, the electric valve 12 and the unloading valve 2 receive signals at the same time, and the unloading valve 2 will close quickly to prevent the system from overpressure and ensure safety. The electric valve 12 can be closed slowly. Waiting for the next loading, if the electric valve 12 is not closed before loading, it will wait until the electric valve 12 is closed, and then enter the next loading, and repeat the actions in sequence.

[0030] During the period from starting to loading, the unloading and venting solenoid valve 7 is in an open state; during the period from loading to shutting down, the unloading and venting solenoid valve 7 is in a closed state; during shutting down, the unloading and venting solenoid valve 7 is in an open state.

[0031] After the unloading shutdown vent channel 6 passes through the unloading vent solenoid valve 7, the vented gas forms two branches. One branch passes through the unloading pressure maintaining regulating circuit 8 to keep the pressure in the gas-liquid separator 4 low and operate at a certain pressure, ensuring that the liquid can circulate in the system and keep the system under low load operation; the other branch returns to the main engine 3 through the main engine unloading air replenishing circuit 9 during unloading. After unloading, it can replenish compressed gas for the main engine 3 and adjust the vacuum degree in the main engine 3 so that the vacuum degree in the main engine 3 will not be too high, ensuring that the liquid can be discharged from the main engine 3.

[0032] When starting up and before shutting down, the bypass solenoid valve 23 is opened, and when the unloading valve 2 is not opened, the bypass air intake pipe 22 takes in air to the main machine 3 and is discharged into the gas-liquid separator 4, cooperating with the unloading and shutdown venting channel 6 to allow the system to operate at a constant pressure at a certain value. When the unloading valve 2 is opened, air is taken in together. When the machine is shut down, the bypass solenoid valve 23 is closed to prevent the high-pressure gas from the gas source from entering the main machine 3.

[0033] The compressed gas-liquid mixture is separated by the gas-liquid separator 4, and the liquid returns to the main unit 3 after passing through the liquid cooler 14, the liquid filter 15 and the water cut-off solenoid valve 16. The liquid filter 15 is inverted, that is, the inlet and outlet are arranged at the bottom, and a space is reserved above the filter element 17 for storing the gas released from the liquid to form an airbag structure 18 (such as Figure 5 As shown in the figure), it is used to mitigate the impact of water hammer and absorb the pulse power of water, so that the liquid filter 15 forms a pulse damper, reduces the vibration of the pipeline and the vibration of the entire system, and ensures the safety of the system. An exhaust valve 19 is provided at the upper end of the shell of the liquid filter 15, which is used for emptying the machine when starting up for the first time, emptying the machine when replacing the filter element for maintenance, etc.

[0034] The liquid cooler 14 can be an air-cooled cooler or a water-cooled cooler, and the liquid can be water, lubricating oil, etc. Different types of products can be selected according to terminal requirements.

[0035] Embodiment 2 is improved on the basis of embodiment 1, referring to Figure 1 , the discharge channel 24 is branched out from the unloading pressure-maintaining regulating circuit 8, and the discharge channel 24 is used to discharge the vented gas to the atmosphere. The discharge channel 24 is provided with a venting throttle hole 25 and a venting muffler 26. Under the action of the discharge channel 24, the internal pressure of the main engine 3 can be released to the same level as the atmospheric pressure after shutdown, so that the main engine 3 can be started with light load without the action of internal pressure the next time it is started, reducing the starting current of the motor, so as to avoid the occurrence of overload shutdown failure.

[0036] After unloading the pressure-maintaining regulating hole 10, two discharge paths are formed again, one path is returned to the gas source end through the pressure check valve 20, and the other path is returned to the atmosphere. When the venting pressure is lower than the gas source pressure, the venting gas cannot push open the pressure check valve 20, and the venting gas cannot be released back to the gas source. When the pressure of the venting gas is higher than the gas source pressure, the part higher than the gas source pressure can be released back to the air guide pipe 5, and part of the high-pressure gas can be recovered to save energy. The other path is returned to the atmosphere through the discharge channel 24. A venting throttle hole 25 and a venting muffler 26 are set in the discharge channel 24, so that the internal pressure of the gas-liquid separator 4 is reduced to below the pressure of the gas source, thereby reducing the energy consumption during no-load operation and achieving energy-saving effect. This is because the discharge channel 24 achieves different effects and functions in different states. The venting throttle hole 25 is used to adjust the venting volume and venting speed, and the venting muffler 26 is used to reduce noise. This path can be vented all the time.

[0037] A return throttle hole 27 is provided on the main engine unloading air supply circuit 9.

[0038] Through the return throttle hole 27 , the amount of gas returned to the main unit 3 can be adjusted according to the vacuum requirement in the main unit 3 .

[0039] In the process of the deflated gas returning to the main engine 3 through the main engine unloading and air replenishing circuit 9 , the amount of gas returning to the main engine 3 is adjusted according to the vacuum requirement in the main engine 3 through the return throttle hole 27 .

[0040] Embodiment 3 is improved on the basis of embodiment 2, referring to Figure 1 An intake valve switch channel 28 is provided between the unloading valve 2 and the air guide pipe 5 , and a loading and unloading solenoid valve 29 is provided on the intake valve switch channel 28 .

[0041] The air source for controlling the intake valve switch channel 28 is taken from the intake air source, and the pressure is moderate, so it can be used directly. In this way, there is no need to select a high-pressure unloading valve 2, which has low cost and high reliability, or no need to configure a pressure reducing valve.

[0042] Embodiment 4 is improved on the basis of embodiment 2, referring to Figure 2 An intake valve switch channel 28 is provided between the unloading valve 2 and the unloading shutdown venting channel 6, and a loading and unloading solenoid valve 29 and a pressure reducing valve 30 are provided on the intake valve switch channel 28.

[0043] The gas source for controlling the intake valve switch channel 28 is taken from the gas-liquid separator 4, but the exhaust pressure of the supercharger is often high, such as exceeding 1.6MPa. If it reaches 4MPa, it is necessary to add a pressure reducing valve 30 to reduce the air pressure to meet the safety pressure used by the unloading valve 2 to ensure the safety and reliability of the unloading valve 2 to prevent the high-pressure gas from exploding the cylinder.

[0044] Embodiment 2, embodiment 3 and embodiment 4 are applicable to air-like gases.

[0045] Embodiment 5 is improved on the basis of embodiment 1, referring to Figure 3 A host shutdown pressure relief circuit 31 is connected between the air inlet end of the host 3 and the air duct 5. A shutdown pressure relief valve 32 and a pressure relief check valve 33 are provided on the host shutdown pressure relief circuit 31. The flow direction of the pressure relief check valve 33 is from the host 3 to the air duct 5 to appropriately reduce the internal pressure of the host 3. The internal pressure of the host 3 comes from the high-pressure gas from the host 3 to the exhaust check valve flowing back into the host 3. The internal pressure of the host 3 will be higher than the pressure of the gas source when the host 3 is used. When the host 3 is started next time, the starting load can be reduced.

[0046] This embodiment is applicable to process gas. A shutdown pressure relief valve 32 and a pressure relief check valve 33 are arranged between the main engine 3 and the air inlet source, so as to release the high-pressure gas in the main engine 3 back to the air source and reduce the internal pressure of the main engine 3 so that the main engine 3 can be started with a light load next time.

[0047] It also includes a manual drain valve 34 , which is arranged on the unloading and shutdown drain channel 6 , and the manual drain valve 34 is located at the front end of the unloading and draining solenoid valve 7 .

[0048] However, when venting, a manual drain valve 34 is provided before the unloading and venting solenoid valve 7 so that the system pressure can be completely released during maintenance and inspection.

[0049] Embodiment 6 is improved on the basis of embodiment 5, referring to Figure 3 An intake valve switch channel 28 is provided between the unloading valve 2 and the air guide pipe 5 , and a loading and unloading solenoid valve 29 is provided on the intake valve switch channel 28 .

[0050] Embodiment 7 is improved on the basis of embodiment 5, referring to Figure 4 The unloading valve 2 is connected to an external gas source by controlling the intake valve switch channel 28, and a loading and unloading solenoid valve 29 is provided on the intake valve switch channel 28.

[0051] The gas source for controlling the intake valve switch channel 28 is taken from an external gas source, and a gas source suitable for opening the unloading valve 2 is connected. The external gas source is particularly suitable for gas boosters. When the gas is expensive or toxic and cannot be released into the atmosphere, an external gas source must be used, or a small booster must be installed inside to supply gas.

[0052] Embodiment 5, embodiment 6 and embodiment 7 are applicable to process gases.

[0053] In summary, the present invention adds a pressure regulating valve 11. Since the intake pressure is high and the upper pressure limit is uncontrollable, the pressure regulating valve 11 is used to control the intake pressure to prevent it from being too high, so as to avoid frequent shutdowns; the electric valve 12 and the unloading valve 2 are used together, so that they are opened slowly when opened to avoid the impact of gas pulses, effectively improving the reliability of the system, and closed quickly when closed to avoid system overpressure, effectively reducing the action of the safety valve, and ensuring that the system works at a safe pressure; an efficient venting circuit is set according to different gases, which not only saves resources for venting high-pressure gas and reuses it, but also effectively controls the vacuum degree of the machine head, and does not discharge harmful gases into the air, thereby not polluting the atmosphere; by bypassing the intake pipe 22, under the premise of good sealing of the unloading valve 2, effective air replenishment is achieved, and the solenoid valve is actuated once each when opened and stopped, effectively improving the reliability of the solenoid valve; the liquid filter 15 is set upside down, effectively combined with the damping structure to be set as a whole, effectively reducing the fluid system Pulse vibration, or cavitation vibration, or vibration caused by water hammer can improve the reliability of the system, while reducing costs and space. The present invention can be used as a conventional air booster or as a process gas booster. When the process gas booster is used, the main engine is provided with a shutdown pressure relief valve 32 and a pressure relief check valve 33, which are used to return the high-pressure gas in the main engine 3 to the gas source to reduce the internal pressure of the main engine 3 so that the main engine 3 can be started with a light load next time. A manual drain valve 34 is set before the unloading and emptying solenoid valve 7 so that the system pressure can be completely released during maintenance and inspection. The single-screw force balance feature has small vibration. The main engine 3 has no short-life wearing parts, has a long service life, has less gas attenuation, is more energy-saving, has a large pressure ratio, which can be from 2 to 10 or higher, and requires fewer compression stages, that is, it can be an oil-containing model or an oil-free model. The oil-free model can use water as liquid to achieve environmental protection. It uses stainless steel materials and can be used for corrosive media. In general, single-screw high-pressure booster has obvious comprehensive advantages and is a good choice, suitable for the needs of today's energy-saving and environmental development.

[0054] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the patent scope of this case.

Claims

1. A single screw supercharger, comprising an air filter, an unloading valve, a main engine, and an air-liquid separator, wherein the air filter and the unloading valve are connected via an air guide pipe, the unloading valve is connected to the air inlet end of the main engine, the air inlet at the upper end of the air-liquid separator is connected to an unloading shutdown venting channel, an unloading shutdown venting solenoid valve is provided on the unloading shutdown venting channel, the end of the unloading shutdown venting channel is divided into two paths, one is an unloading pressure maintaining regulating circuit, and the other is a main engine unloading air supply circuit, the unloading pressure maintaining regulating circuit is connected to the air guide pipe, the unloading pressure maintaining regulating circuit is provided with an unloading pressure maintaining regulating hole, the main engine unloading air supply circuit is connected to the main engine, and is characterized in that: The air inlet pipe of the air filter is provided with a pressure regulating valve and an electric valve, the electric valve is located at the rear end of the pressure regulating valve, and the electric valve is controlled by an electrical signal to perform a slow opening and closing action and stepless displacement adjustment, the unloading valve is a pneumatic valve, which performs a fast opening and closing action, the coolant outlet of the gas-liquid separator is connected to the main engine through a liquid circuit, the liquid circuit is provided with a liquid cooler, a liquid filter, and a water cut-off solenoid valve in sequence according to the liquid flow direction, and the liquid filter is inverted, the lower side of the liquid filter is provided with a filter element for filtering impurities, the upper side of the liquid filter is provided with an air bag structure for shock absorption and pulse absorption, and the liquid filter is provided with an exhaust valve; A pressure check valve is provided at the rear end of the unloading pressure-maintaining regulating hole, and the flow direction of the pressure check valve is from the unloading shutdown venting channel to the air guide pipe; A discharge channel is branched out from the unloading pressure-maintaining regulating circuit, and the discharge channel is used to discharge the vented gas into the atmosphere. A venting throttle hole and a venting muffler are arranged on the discharge channel.

2. A single screw supercharger according to claim 1, characterized in that: A precooling cooler is arranged on the air inlet pipe of the air filter, and the precooling cooler is located between the electric valve and the air inlet of the air filter.

3. A single screw supercharger according to claim 2, characterized in that: A bypass air intake pipe is connected between the air guide pipe and the air intake end of the main engine, and a bypass solenoid valve is arranged on the bypass air intake pipe.

4. A single screw supercharger according to claim 3, characterized in that: An intake valve switch channel is provided between the unloading valve and the air guide pipe, and a loading and unloading solenoid valve is provided on the intake valve switch channel.

5. A single screw supercharger according to claim 3, characterized in that: An intake valve switch channel is provided between the unloading valve and the unloading shutdown venting channel, and a loading and unloading solenoid valve and a pressure reducing valve are provided on the intake valve switch channel.

6. A single screw supercharger according to claim 3, characterized in that: The unloading valve is connected to an external gas source via a control air intake valve switch channel, and a loading and unloading solenoid valve is arranged on the control air intake valve switch channel.

7. A single screw supercharger according to claim 6, characterized in that: A host shutdown pressure relief circuit is connected between the air inlet end of the host and the air duct. A shutdown pressure relief valve and a pressure relief check valve are provided on the host shutdown pressure relief circuit. The flow direction of the pressure relief check valve is from the host to the air duct.

8. A single screw supercharger according to claim 6, characterized in that: It also includes a manual drain valve, which is arranged on the unloading and shutdown drain passage, and the manual drain valve is located at the front end of the unloading and draining solenoid valve.

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