Compound solar air-cooled screw parallel machine

Abstract

The present application belongs to the technical field of air-cooled screw parallel machine, and specifically discloses a composite solar air-cooled screw parallel machine, which comprises a machine shell, wherein a parallel machine mechanism, an oil inlet mechanism and a temperature adjusting mechanism are arranged on the machine shell; the parallel machine mechanism comprises a machine shell, an air inlet pipe, a connecting seat, an air outlet, a compression cavity, a first end cover, a second end cover, a rotating shaft, a first screw, a second screw and a stabilizing bearing; the machine shell is internally formed with a compression cavity; the two ends of the machine shell are respectively provided with a first end cover and a second end cover; the first screw and the second screw are rotatably arranged in the compression cavity and are in engagement with each other; and the protective mechanism is arranged on the end of the spray pipe to form a tangential jet flow, thereby effectively avoiding the coking and blocking of the end of the spray head; meanwhile, the temperature adjusting box is used to selectively introduce cold water or hot water to cool or heat the lubricating oil, so that the oil temperature is always maintained within the optimal working temperature range, and the operation reliability of the unit is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of air-cooled screw parallel machine, and specifically discloses a composite solar-powered air-cooled screw parallel machine. Background Technology

[0002] Air-cooled screw compressor units, due to their compact structure, high energy efficiency, and flexible adjustment, are widely used in refrigeration and air conditioning, heat pump heating, and industrial cooling. The core component of these units is an oil-injected screw compressor. Its working principle involves a pair of meshing male and female screw rotors compressing refrigerant gas while simultaneously injecting lubricating oil into the compression chamber. The injected lubricating oil serves three main functions: first, it absorbs the large amount of heat generated during compression, effectively reducing the exhaust temperature; second, it forms an oil film seal between the rotor meshing gap and the gap between the rotor and the housing, reducing gas leakage; and third, it lubricates the screw rotor and bearings, reducing mechanical wear. With increasingly stringent energy conservation and emission reduction requirements, combining renewable energy sources such as solar energy with air-cooled screw compressor units has become an important development direction in the industry. Composite solar-powered air-cooled screw compressor units can fully utilize solar heat while reducing conventional energy consumption, demonstrating broad application prospects.

[0003] However, the fuel injectors of existing air-cooled screw compressor units are constantly exposed to the high-temperature environment of the compression chamber. Their tips are highly susceptible to carbon buildup and coking due to high-temperature oil oxidation. As operating time increases, this carbon buildup gradually clogs the injection holes, leading to decreased fuel injection volume, deteriorated atomization, and increased compressor exhaust temperature. In severe cases, it can even cause screw seizure or compressor burnout. Furthermore, the existing fuel injection system has limited oil temperature regulation methods, making it difficult to adapt to seasonal temperature changes. In summer, when ambient temperatures are high, the gas temperature inside the compression chamber also rises. If the injected lubricating oil is too cold, the low-temperature oil entering the high-temperature compression chamber and coming into contact with the high-temperature gas can easily cause carbon buildup on the screw surface and inside the compression chamber. Condensation occurs on the walls. Water dissolved in high-temperature gas or residual moisture condenses into liquid water when the local temperature drops below the dew point. The generation of condensation directly leads to the emulsification and deterioration of lubricating oil, a sharp decline in lubrication performance, and accelerated bearing wear. At the same time, liquid water droplets can also cause cavitation damage to the surface of the screw rotor, seriously affecting the life of the unit. In winter, when the ambient temperature is low, if the oil temperature is not properly controlled and the oil temperature is too high, the viscosity of the lubricating oil will decrease, making it impossible to form an effective oil film seal in the rotor gap. This will lead to increased gas leakage and decreased compression efficiency. At the same time, excessively high oil temperature will also accelerate oil oxidation and shorten the oil change cycle, which will greatly restrict the unit's annual operating efficiency and reliability. Summary of the Invention

[0004] To address the technical problems of existing air-cooled parallel screw compressor units, such as carbon buildup and blockage at the nozzle ends due to prolonged exposure to high-temperature compression chambers, and the limited oil supply temperature adjustment methods that make it difficult to adapt to temperature differences between winter and summer, thus causing oil emulsification, this invention provides a composite solar-powered air-cooled parallel screw compressor.

[0005] To achieve the above objectives, the present invention provides a composite solar-powered air-cooled screw parallel compressor, including a housing, on which a parallel compressor mechanism, an oil inlet mechanism, and a temperature control mechanism are provided; The parallel machine mechanism includes a housing, an air inlet pipe, a connecting seat, an air outlet, a compression chamber, a first end cover, a second end cover, a rotating shaft, a first screw, a second screw, and a stabilizing bearing. The compression chamber is formed inside the housing. The first end cover and the second end cover are respectively provided at both ends of the housing. The first screw and the second screw are rotatably arranged in the compression chamber. The first screw and the second screw mesh with each other. Both ends of the first screw and the second screw are rotatably connected to the first end cover and the second end cover through the stabilizing bearing. The oil inlet mechanism includes a processing cylinder, an oil inlet pipe, a filter mechanism, an oil delivery pipe, a spray pipe, an outer protective pipe, a connecting hole, a nozzle, an oil distribution port, and a threaded oil delivery groove. The processing cylinder is installed below the machine housing and is connected to the oil inlet pipe. A filter mechanism is provided inside the processing cylinder. The processing cylinder is connected to the spray pipe through the oil delivery pipe. The spray pipe extends into the compression chamber. One end of the outer wall of the multiple spray pipes is connected to a protective mechanism. The temperature control mechanism includes a temperature control box, a through hole, a return water pipe, a mounting block, a spray head, a spray hole, a cold water supply pipe, and a hot water supply pipe. The temperature control box is fitted onto the outer wall of the oil delivery pipe and is used to regulate the temperature of the lubricating oil inside the oil delivery pipe. The first screw and the second screw are rotatably connected between the first end cover and the second end cover via a stabilizing bearing. Their threads rotate in opposite directions, and the gas is compressed through meshing rotation. The filtration mechanism inside the treatment cylinder is used to filter and purify the incoming lubricating oil. The protective mechanism is used to form a tangential jet at the nozzle end. The temperature control box selectively introduces cold or hot water to heat or cool the lubricating oil in the oil supply pipe, so that the oil supply temperature can adapt to the needs of different seasons and working conditions.

[0006] Preferably, an air inlet pipe is connected to the top of the housing, a connecting seat is connected to the bottom side of the housing, an air outlet is provided at the bottom of the housing and the connecting seat, and the air inlet pipe is located on the top of the housing and communicates with the compression chamber. Gas enters the compression chamber through the intake pipe, is compressed by the screw, and is discharged from the outlet. The intake pipe is located above the housing and the outlet is located below the connector, so that the airflow runs vertically through the compression chamber. This facilitates the settling and separation of oil droplets under gravity during the compression process, reducing the amount of oil carried in the exhaust.

[0007] Preferably, the filtration mechanism includes a filter cartridge, a cleaning motor, and a cleaning scraper. The filter cartridge is installed on one side of the inner wall of the processing cartridge, and the cleaning motor is installed at one end of the processing cartridge. The output end of the cleaning motor passes through the processing cartridge and the filter cartridge in sequence and extends into the interior of the filter cartridge. The output end of the cleaning motor is connected to the cleaning scraper, and the cleaning scraper slides in cooperation with the inner wall of the filter cartridge.

[0008] Preferably, there are two oil supply pipes arranged symmetrically. One end of each oil supply pipe is connected to the processing cylinder, and the other end of each oil supply pipe extends through into the interior of the connecting seat. The connecting seat has mounting holes corresponding to the two oil supply pipes. The two oil supply pipes are respectively inserted into the two mounting holes. The upper ends of each oil supply pipe are connected to multiple nozzles. The multiple nozzles above one oil supply pipe and the multiple nozzles above the other oil supply pipe are arranged alternately along the axial direction of the housing. The multiple nozzles penetrate the connecting seat and the housing and extend into the compression chamber. The cleaning motor drives the cleaning scraper to rotate. The cleaning scraper rotates closely against the inner wall of the filter cartridge, scraping off the impurities attached to the inner wall and depositing them at the bottom of the processing cartridge. The filter cartridge intercepts and filters solid impurities in the lubricating oil. The cleaning scraper periodically scrapes off the impurities attached to the inner wall of the filter cartridge, preventing impurities from accumulating on the surface of the filter cartridge and increasing the filtration resistance. This ensures the continuous and effective operation of the filtration mechanism and extends the service life of the filter cartridge.

[0009] Preferably, the protective mechanism includes an outer protective tube, which is sleeved on one side of the outer wall of the nozzle. The connecting seat and the housing are provided with connecting holes corresponding to multiple nozzles, and multiple nozzles and the outer protective tube are inserted into the corresponding connecting holes. The outer protective tube is fitted over the end of the nozzle that extends into the compression chamber, providing structural protection for the nozzle end and preventing it from vibrating or shifting under the impact of high-pressure gas. At the same time, an annular gap is formed between the outer protective tube and the nozzle, serving as a channel for the distribution of lubricating oil and providing space for the subsequent formation of a tangential jet. The sealing ring at the connection hole is used to prevent high-pressure gas in the compression chamber from leaking outward along the gap between the nozzle and the outer protective tube.

[0010] Preferably, one end of each of the multiple nozzles is connected to a nozzle, the nozzle is located inside the corresponding outer protective tube, the outer wall of the nozzle is provided with an oil distribution port in the circumferential direction, and the inner wall of the outer protective tube is provided with a threaded oil delivery groove at each of the multiple oil distribution ports. When the high-pressure lubricating oil in the nozzle flows through the oil distributor, a portion of the lubricating oil enters the annular gap between the outer protective pipe and the nozzle and flows into the threaded oil delivery groove. Since the threaded oil delivery groove is spiral-shaped, the lubricating oil flows at high speed in the spiral direction within the groove, forming a rotating tangential jet on the outer wall of the nozzle tip. This rotating jet continuously sweeps the outer wall of the nozzle tip and the edge of the connecting hole outlet, promptly peeling off and flushing away the sludge and carbon deposit precursors that attempt to adhere to the tip edge, thereby preventing the nozzle tip from being blocked by coking and ensuring the stability of the oil injection volume.

[0011] Preferably, the spray direction of one of the nozzles above the oil pipeline is toward the root circle of the tooth corresponding to the first screw, and the spray direction of the other nozzle above the oil pipeline is toward the root circle of the tooth corresponding to the second screw.

[0012] Preferably, the temperature control box is installed on one side of the processing cylinder and sleeved on the outer wall of the two oil supply pipes. One side of the temperature control box is open at the cleaning motor. The temperature control box has a through hole, and the two oil supply pipes pass through the corresponding through hole. A sealing ring is embedded in the inner wall of the through hole, and the sealing ring is connected to the outer wall of the oil supply pipe. A return water pipe is connected to the lower end of the temperature control box. An installation block is provided at the upper end of the inner wall of the temperature control box, and a spray head is provided at the lower end of the installation block. A spray hole is provided below the spray head. Cold water supply pipe and hot water supply pipe are respectively connected to the two sides of the upper end of the temperature control box. The hot water supply pipe is connected to a solar thermal storage device. The temperature control chamber is fitted onto the outer wall of the two oil supply pipes, forming a closed heat exchange chamber through which the oil supply pipes pass. The cold water supply pipe and hot water supply pipe are independently controlled, selectively introducing cold or hot water into the temperature control chamber. When the ambient temperature is high or the oil temperature exceeds a preset value, cold water is introduced for forced cooling; when the ambient temperature is low or preheating is required for cold starts, hot water is introduced for heating. This temperature control mechanism ensures that the lubricating oil temperature is always maintained within the preset optimal operating temperature range. This avoids the problems of condensation and oil emulsification caused by low-temperature oil entering the high-temperature compression chamber in summer due to localized temperature drops below the dew point, and also avoids the problems of reduced viscosity, seal failure, and increased leakage due to high oil temperature in winter, ensuring reliable operation of the unit under different ambient temperatures throughout the year. Simultaneously, the temperature control chamber has an open section on one side, with the cleaning motor located inside the opening, making the overall structure more compact and saving installation space.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention features a filter cartridge and a cleaning scraper inside the processing cylinder. A cleaning motor drives the scraper to rotate close to the inner wall of the filter cartridge, scraping away impurities adhering to the inner wall and depositing them at the bottom of the processing cylinder. This gives the filter cartridge an online self-cleaning capability, maintaining smooth filtration without frequent disassembly and cleaning, and avoiding the problem of insufficient oil supply due to impurity accumulation. By setting two symmetrically arranged oil supply pipes and having multiple nozzles above the two oil supply pipes alternately arranged along the axial direction of the housing, the lubricating oil is evenly distributed along the entire length of the screw, avoiding the problem of insufficient or excessive oil supply caused by oil supply from one side.

[0014] By opening an oil distribution port circumferentially on the outer wall of the nozzle and correspondingly opening a threaded oil delivery groove on the inner wall of the outer protective tube, a portion of the lubricating oil in the nozzle enters the annular gap between the outer protective tube and the nozzle through the oil distribution port. Under the spiral guidance of the threaded oil delivery groove, a rotating tangential jet is formed. This jet continuously sweeps the outer wall of the nozzle tip, peeling off and washing away the adhering substances in time. This effectively avoids the formation of carbon deposits and coking at the nozzle tip due to oil oxidation in the high-temperature compression chamber environment, ensuring the smooth flow of the oil injection hole and the stability of the oil injection volume. It also avoids problems such as increased compressor exhaust temperature, accelerated bearing wear, and even screw jamming caused by nozzle blockage.

[0015] This invention involves installing a temperature control box around the oil pipeline and connecting a cold water supply pipe and a hot water supply pipe to the temperature control box. Cold water or hot water is selectively introduced to cool or heat the lubricating oil according to the ambient temperature. In summer, cold water is introduced for forced cooling to prevent low-temperature oil from entering the high-temperature compression chamber and causing condensation that could lead to emulsification and deterioration of the lubricating oil. In winter, hot water is introduced for preheating to prevent the oil temperature from being too low, resulting in excessive viscosity or too high viscosity, which could lead to seal failure and reduced efficiency. This ensures that the oil temperature is always maintained within the optimal operating temperature range. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is an overall cross-sectional view of the device of the present invention; Figure 3 This is a schematic diagram of the connection hole structure of the present invention; Figure 4 This is a schematic diagram of the installation structure of the first screw and the second screw of the present invention; Figure 5 This is a schematic diagram of the structure of the compression chamber of the present invention; Figure 6 This is a schematic diagram of the installation structure of the two oil delivery mechanisms and the upper nozzle of the present invention; Figure 7 This is a schematic diagram of the internal structure of the processing cylinder of the present invention; Figure 8 This is a schematic diagram of the structure for opening the oil separator port of the present invention; Figure 9 This is a schematic diagram of the internal structure of the outer protective tube of the present invention; Figure 10 This is a schematic diagram of the structure of the threaded oil channel of the present invention; Figure 11 This is a schematic diagram of the installation structure of the temperature control mechanism of the present invention.

[0017] In the diagram: 1. Housing; 2. Inlet pipe; 3. Connecting seat; 4. Outlet; 5. Compression chamber; 6. First end cover; 7. Second end cover; 8. Shaft; 9. First screw; 10. Second screw; 11. Stabilizing bearing; 12. Processing cylinder; 13. Oil inlet pipe; 14. Filter cartridge; 15. Cleaning motor; 16. Cleaning scraper; 17. Oil delivery pipe; 18. Spray pipe; 19. Outer protective pipe; 20. Connecting hole; 21. Nozzle; 22. Oil distribution port; 23. Threaded oil delivery groove; 24. Temperature control box; 25. Through hole; 26. Return water pipe; 27. Mounting block; 28. Spray head; 29. ​​Spray hole; 30. Cold water supply pipe; 31. Hot water supply pipe. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0020] like Figures 1-11 The composite solar-powered air-cooled screw parallel compressor shown includes a housing 1, on which a parallel compressor mechanism, an oil inlet mechanism, and a temperature control mechanism are provided; The parallel mechanism includes a housing 1, an air inlet pipe 2, a connecting seat 3, an air outlet 4, a compression chamber 5, a first end cover 6, a second end cover 7, a rotating shaft 8, a first screw 9, a second screw 10, and a stabilizing bearing 11. The compression chamber 5 is formed inside the housing 1. The first end cover 6 and the second end cover 7 are respectively provided at both ends of the housing 1. The first screw 9 and the second screw 10 are rotatably arranged in the compression chamber 5. The first screw 9 and the second screw 10 mesh with each other. Both ends of the first screw 9 and the second screw 10 are rotatably connected to the first end cover 6 and the second end cover 7 through the stabilizing bearing 11. The oil inlet mechanism includes a processing cylinder 12, an oil inlet pipe 13, a filter mechanism, an oil delivery pipe 17, a nozzle 18, an outer protective pipe 19, a connecting hole 20, a nozzle 21, an oil distribution port 22, and a threaded oil delivery groove 23. The processing cylinder 12 is installed below the housing 1 and is connected to the oil inlet pipe 13. A filter mechanism is provided inside the processing cylinder 12. The processing cylinder 12 is connected to the nozzle 18 through the oil delivery pipe 17. The nozzle 18 extends into the compression chamber 5. One end of the outer wall of the multiple nozzles 18 is connected to a protective mechanism. The temperature control mechanism includes a temperature control box 24, a through hole 25, a return water pipe 26, a mounting block 27, a spray head 28, a spray hole 29, a cold water supply pipe 30, and a hot water supply pipe 31. The temperature control box 24 is fitted on the outer wall of the oil supply pipe 17 and is used to regulate the temperature of the lubricating oil in the oil supply pipe 17. like Figures 1-5 As shown: the compression chamber 5 provides compression space for the first screw 9 and the second screw 10. The first end cap 6 and the second end cap 7 are used to seal the two ends of the compression chamber 5 and provide support for the rotating shaft 8 and the screws. The first screw 9 is a male rotor and the second screw 10 is a female rotor. The two screws have opposite threads and achieve gas compression through meshing rotation. The gas enters the compression chamber 5 from the inlet pipe 2. As the screws rotate, the gas is gradually compressed and discharged from the outlet 4.

[0021] The oil inlet mechanism is used to supply lubricating oil to the first screw 9 and the second screw 10 in the compression chamber 5. The processing cylinder 12 is installed below the housing 1 and is connected to the oil inlet pipe 13. The oil inlet pipe 13 is connected to an external oil inlet device. An oil inlet valve is connected to one side of the outer wall of the oil inlet pipe 13. The filter mechanism is used to filter and purify the incoming lubricating oil to remove impurities and particles. The nozzle 18 is used to spray the lubricating oil onto the surface of the first screw 9 and the second screw 10. The protection mechanism is used to form a spiral tangential jet at the end of the nozzle 18 to prevent coking and blockage at the end of the nozzle 21.

[0022] The temperature control mechanism is used to regulate the temperature of the lubricating oil in the oil supply pipe 17 so that the oil supply temperature can adapt to the needs of different seasons and working conditions. The temperature control box 24 is fitted on the outer wall of the oil supply pipe 17. The interior of the temperature control box 24 forms a closed heat exchange chamber. The oil supply pipe 17 passes through this chamber. The cold water supply pipe 30 and the hot water supply pipe 31 are used to introduce cold water and hot water respectively. The cold water or hot water is sprayed onto the outer wall of the oil supply pipe 17 through the spray head 28 and the spray hole 29 to exchange heat with the lubricating oil in the oil supply pipe 17. The return water pipe 26 is used to discharge the water after heat exchange. When cooling is required, cold water enters the temperature control box 24 through the cold water supply pipe 30 and is sprayed onto the outer wall of the oil supply pipe 17 through the spray holes 29 of the spray head 28. After absorbing the heat of the lubricating oil in the oil supply pipe 17, it is discharged from the return water pipe 26. When heating is required, hot water is introduced through the hot water supply pipe 31. The heat is transferred to the lubricating oil through the pipe wall of the oil supply pipe 17 to achieve heating and achieve precise control of the temperature of the lubricating oil in the oil supply pipe 17.

[0023] like Figures 1-3 As shown: An air inlet pipe 2 is connected to the top of the housing 1, a connecting seat 3 is connected to the bottom side of the housing 1, and an air outlet 4 is opened at the bottom of the housing 1 and the connecting seat 3. The air inlet pipe 2 is located above the housing 1 and communicates with the compression chamber 5. The outlet 4 is used to discharge the compressed gas. The inlet pipe 2 is located above the housing 1 and communicates with the compression chamber 5. The gas enters the compression chamber 5 through the inlet pipe 2, is compressed by the screw, and is discharged from the outlet 4. Gas enters the compression chamber 5 through the upper intake pipe 2, and the pressure increases under the compression action of the screw. It is then discharged from the lower outlet 4, forming a complete gas compression path.

[0024] One end of the rotating shaft 8 passes through the first end cover 6 and extends into the compression chamber 5. The first screw 9 is fixedly connected to one end of the rotating shaft 8, and the second screw 10 is rotatably connected to one side of the inner wall of the first end cover 6. The threads of the first screw 9 and the second screw 10 are opposite and mesh with each other. The rotating shaft 8 is used to transmit the power of the external drive motor to the first screw 9. The first screw 9 is fixedly connected to one end of the rotating shaft 8 and rotates synchronously with the rotating shaft 8. The first screw 9 and the second screw 10 have opposite thread directions and mesh with each other. When the first screw 9 rotates, it drives the second screw 10 to rotate in the opposite direction through meshing. An external motor drives the rotating shaft 8 to rotate, which in turn drives the first screw 9 to rotate. The helical teeth of the first screw 9 push the helical teeth of the second screw 10, causing the second screw 10 to rotate synchronously in opposite directions. A closed compression chamber 5 that continuously advances forward is formed between the two, thereby achieving continuous compression of the gas.

[0025] like Figures 6-7 As shown: The filtration mechanism includes a filter cartridge 14, a cleaning motor 15, and a cleaning scraper 16. The filter cartridge 14 is installed on one side of the inner wall of the processing cartridge 12. The cleaning motor 15 is installed at one end of the processing cartridge 12. The output end of the cleaning motor 15 passes through the processing cartridge 12 and the filter cartridge 14 in sequence and extends into the interior of the filter cartridge 14. The output end of the cleaning motor 15 is connected to the cleaning scraper 16, and the cleaning scraper 16 slides in cooperation with the inner wall of the filter cartridge 14. The filter cartridge 14 is installed on one side of the inner wall of the processing cylinder 12. The filter cartridge 14 is a cylindrical filter element with filter holes on its side wall to intercept solid impurities in the lubricating oil. When the lubricating oil enters the processing cylinder 12 from the oil inlet pipe 13 and passes through the filter holes of the filter cartridge 14, the impurities are intercepted on the inner wall of the filter cartridge 14. The cleaning motor 15 periodically drives the cleaning scraper 16 to rotate. The cleaning scraper 16 rotates close to the inner wall of the filter cartridge 14 to scrape off the impurities attached to the inner wall, so as to avoid the impurities from clogging the filter screen of the filter cartridge 14.

[0026] like Figures 6-7As shown: There are two oil supply pipes 17 arranged symmetrically. One end of each oil supply pipe 17 is connected to the processing cylinder 12, and the other end of each oil supply pipe 17 extends through to the inside of the connecting seat 3. The connecting seat 3 has mounting holes for each of the two oil supply pipes 17. The two oil supply pipes 17 are respectively inserted into the two mounting holes. The upper end of each of the two oil supply pipes 17 is connected to multiple nozzles 18. The multiple nozzles 18 above one oil supply pipe 17 and the multiple nozzles 18 above the other oil supply pipe 17 are arranged alternately along the axial direction of the housing 1. The multiple nozzles 18 all pass through the connecting seat 3 and the housing 1 and extend into the inside of the compression chamber 5. The nozzles 18 on the two oil supply pipes 17 are staggered in the axial direction to form an interlaced distribution. Multiple nozzles 18 pass through the connecting seat 3 and the housing 1 and extend into the compression chamber 5. The filtered lubricating oil flows from the processing cylinder 12 into the oil supply pipes 17 on the left and right sides respectively, and then is sprayed into the compression chamber 5 through multiple nozzles 18 above each side. The nozzles 18 on both sides are arranged alternately in the axial direction so that the lubricating oil can evenly cover the entire length of the first screw 9 and the second screw 10.

[0027] like Figures 8-10 As shown: The protective mechanism includes an outer protective tube 19, which is sleeved on one side of the outer wall of the nozzle 18. The connecting seat 3 and the housing 1 are provided with connecting holes 20 corresponding to the multiple nozzles 18. The multiple nozzles 18 and the outer protective tube 19 are all inserted into the corresponding connecting holes 20. The outer protective tube 19 is a tubular sleeve. The connecting hole 20 is used for the nozzle 18 and the outer protective tube 19 to pass through the housing wall. The nozzle 18 passes through the housing 1 wall and extends into the compression chamber 5. The outer protective tube 19 is sleeved on the outside of the part of the nozzle 18 that extends into the compression chamber 5, forming a structural protection for the end of the nozzle 18. At the same time, the annular gap between the outer protective tube 19 and the nozzle 18 forms a swirling channel. The outer protective tube 19 plays a protective role for the end of the nozzle 18.

[0028] like Figure 8 As shown: One end of each of the multiple nozzles 18 is connected to a nozzle 21. The nozzle 21 is located inside the corresponding outer protective tube 19. The outer wall of the nozzle 18 is provided with an oil distribution port 22 in the circumferential direction. The inner wall of the outer protective tube 19 is provided with a threaded oil delivery groove 23 corresponding to the multiple oil distribution ports 22. The end face of the nozzle 21 is flush with the end face of the outer protective tube 19. The oil distribution port 22 is used to introduce part of the lubricating oil in the nozzle 18 into the annular gap between the outer protective tube 19 and the nozzle 18. The threaded oil delivery groove 23 is a spiral groove that extends spirally along the inner wall of the outer protective tube 19. When the high-pressure lubricating oil in the nozzle 18 flows through the oil distribution port 22, a portion of the lubricating oil enters the annular gap between the outer protective tube 19 and the nozzle 18 through the oil distribution port 22 and flows into the threaded oil delivery groove 23. This portion of the lubricating oil does not pass through the central hole of the nozzle 21 and is instead sprayed into the threaded oil delivery groove 23 to participate in the swirling flow. Since the threaded oil delivery groove 23 is spiral, the lubricating oil flows at high speed in the spiral direction within the groove, forming a rotating tangential jet on the outer wall of the nozzle 21 end. This rotating tangential jet continuously sweeps the outer wall of the nozzle 21 end and the edge of the outlet of the connecting hole 20. Another portion of the lubricating oil in the nozzle 18 is sprayed directly from the central hole of the nozzle 21 and sprayed onto the surfaces of the first screw 9 and the second screw 10 to achieve cooling, sealing, and lubrication.

[0029] The spray direction of the nozzle 21 above one of the oil pipes 17 is toward the root circle of the tooth corresponding to the first screw 9, and the spray direction of the nozzle 21 above the other oil pipe 17 is toward the root circle of the tooth corresponding to the second screw 10. The nozzle 21 above the left oil pipe 17 sprays lubricating oil onto the lower tooth surface of the first screw 9, and the nozzle 21 above the right oil pipe 17 sprays lubricating oil onto the lower tooth surface of the second screw 10. Under the combined action of gravity and injection pressure, the lubricating oil can effectively enter the tooth grooves and meshing gaps of the screws, and be carried into the entire compression chamber 5 during the rotation of the screws, so as to achieve uniform coverage of the two screws.

[0030] like Figure 11 As shown: The temperature control box 24 is installed on one side of the processing cylinder 12 and sleeved on the outer wall of the two oil supply pipes 17. The side of the temperature control box 24 is open at the cleaning motor 15. The temperature control box 24 has a through hole 25. The two oil supply pipes 17 pass through the corresponding through hole 25. A sealing ring is embedded in the inner wall of the through hole 25. The sealing ring is connected to the outer wall of the oil supply pipe 17. The lower end of the temperature control box 24 is connected to the return water pipe 26. The upper end of the inner wall of the temperature control box 24 is provided with the mounting block 27. The lower end of the mounting block 27 is provided with the spray head 28. The spray hole 29 is opened below the spray head 28. The upper two sides of the temperature control box 24 are respectively connected to the cold water supply pipe 30 and the hot water supply pipe 31. The hot water supply pipe 31 is connected to the solar thermal storage device. Among them, the hot water supply pipe 31 is connected to a solar thermal storage system. The warm water produced by the solar thermal collector is sent to the temperature control box to preheat the lubricating oil. When the sunlight is insufficient, the auxiliary heat source can be switched to supplement the heat, realizing solar composite heating and reducing the unit's conventional energy consumption. Both the cold water supply pipe 30 and the hot water supply pipe 31 are equipped with water supply valves on their outer walls, which can be opened or closed as needed. The cold water supply pipe 30 is connected to an external cold water supply device, and the return water pipe 26 is connected to a recovery water tank. When the ambient temperature is high or the oil temperature exceeds a preset value, cold water enters the mounting block 27 through the cold water supply pipe 30 and is evenly sprayed onto the outer wall of the oil delivery pipe 17 through the spray holes 29 of the spray head 28. The cold water absorbs the heat of the lubricating oil in the oil delivery pipe 17, and its temperature rises before it is discharged from the return water pipe 26, thus achieving... Forced cooling of lubricating oil: When the ambient temperature is low or preheating is required for cold start, hot water enters the mounting block 27 through the hot water supply pipe 31 and is sprayed onto the outer wall of the oil supply pipe 17 through the spray holes 29 of the spray head 28. Heat is transferred to the internal lubricating oil through the pipe wall of the oil supply pipe 17 to achieve preheating. By selectively introducing cold or hot water, the lubricating oil temperature is always maintained within the preset optimal operating temperature range, avoiding the problems of condensation caused by low temperature oil in summer and viscosity reduction caused by high temperature oil in winter.

[0031] It should be noted that the circuit connection and logic control methods of the cleaning motor 15, pipeline water supply control valve, unit temperature sensing controller and other electrical control and execution elements involved in the embodiments of the present invention are all conventional and mature technologies in the field and belong to the scope of existing technology. Those skilled in the art can match the corresponding component models and complete conventional circuit wiring and program settings according to the actual working conditions. The specific electrical control logic and wiring scheme will not be described in detail here. At the same time, the hot water supply pipe 31 is connected to the solar thermal storage and heat exchange system. The water pump, temperature control valve and other auxiliary components of the solar thermal collector circulation system also adopt the industry's common design and do not require additional limitations.

[0032] Working principle: Lubricating oil enters the processing cylinder 12 through the oil inlet pipe 13. When passing through the filter cylinder 14, impurities are intercepted on the inner wall of the filter cylinder 14. The cleaning motor 15 drives the cleaning scraper 16 to rotate. The cleaning scraper 16 rotates closely against the inner wall of the filter cylinder 14 to avoid the filter cylinder 14 from being blocked due to the accumulation of impurities, which would affect the oil supply. Clean lubricating oil flows from the processing cylinder 12 into the oil supply pipes 17 on the left and right sides respectively.

[0033] When the lubricating oil flows through the temperature control box 24 in the oil supply pipe 17, the temperature is adjusted according to the ambient temperature and oil temperature feedback. When the ambient temperature is high or the oil temperature exceeds the preset value, cold water enters the mounting block 27 through the cold water supply pipe 30 and is evenly sprayed onto the outer wall of the oil supply pipe 17 through the spray holes 29 of the spray head 28. The cold water absorbs the heat of the lubricating oil in the oil supply pipe 17 and is discharged from the return water pipe 26, thus achieving forced cooling of the lubricating oil. When the ambient temperature is low or preheating is required for cold start, hot water is introduced through the hot water supply pipe 31. The heat is transferred to the internal lubricating oil through the pipe wall of the oil supply pipe 17, thus achieving preheating. By selectively introducing cold water or hot water, the lubricating oil temperature is always maintained within the preset optimal working temperature range, avoiding the precipitation of condensate and oil emulsification caused by the low temperature oil entering the high temperature compression chamber 5 in summer, and also avoiding the viscosity reduction and seal failure caused by the high oil temperature in winter.

[0034] The temperature-adjusted lubricating oil flows upward along the oil supply pipe 17 and enters each nozzle 18 through the connecting seat 3. The high-pressure lubricating oil in the nozzle 18 is divided into two paths when it flows through the oil distribution port 22. One path, which contains most of the lubricating oil, is sprayed directly from the center hole of the nozzle 21 and onto the lower tooth surface of the first screw 9 and the second screw 10. Under the combined action of gravity and spray pressure, it enters the tooth grooves and meshing gaps of the screws and is carried into the entire compression chamber 5 during the rotation of the screws, playing a role in cooling, sealing, and lubrication. The other path, which contains a small portion of the lubricating oil, passes through the oil distribution port 22. 2. The lubricating oil enters the annular gap between the outer protective tube 19 and the nozzle 18 and flows into the threaded oil channel 23 on the inner wall of the outer protective tube 19. Since the threaded oil channel 23 is spiral, the lubricating oil flows at high speed in the spiral direction in the channel, forming a rotating tangential jet on the outer wall of the nozzle 21 end. This rotating tangential jet continuously sweeps the outer wall of the nozzle 21 end and the edge of the outlet of the connecting hole 20, and timely peels off and washes away the sludge and carbon deposit precursors that try to adhere to the edge of the end, thereby preventing them from hardening and coking in the high temperature environment and preventing the nozzle 21 end from being blocked due to coking.

[0035] An external motor drives the rotating shaft 8 to rotate, which in turn drives the first screw 9 to rotate. The first screw 9, through meshing, drives the second screw 10 to rotate synchronously in the opposite direction. Gas enters the compression chamber 5 from the inlet pipe 2. As the first screw 9 and the second screw 10 mesh and rotate, a continuously advancing closed compression chamber 5 is formed between them. The gas is gradually compressed, and the pressure increases. At the same time, the lubricating oil sprayed onto the screw surface absorbs the heat of compression, seals the meshing gap, and lubricates and stabilizes the bearing 11. Finally, the compressed gas and some oil mist are discharged from the outlet 4 and enter the subsequent oil-gas separation device. During the winter preheating phase, solar thermal storage systems can be prioritized for supplying hot water, utilizing renewable energy to reduce auxiliary heating energy consumption and achieve integrated solar energy operation.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A composite solar-powered air-cooled screw parallel compressor, comprising a housing (1), characterized in that, The housing (1) is provided with a parallel machine mechanism, an oil inlet mechanism and a temperature control mechanism; The parallel machine mechanism includes a housing (1), an air inlet pipe (2), a connecting seat (3), an air outlet (4), a compression chamber (5), a first end cover (6), a second end cover (7), a rotating shaft (8), a first screw (9), a second screw (10), and a stabilizing bearing (11). The housing (1) has a compression chamber (5) inside. The two ends of the housing (1) are respectively provided with a first end cover (6) and a second end cover (7). The first screw (9) and the second screw (10) are rotatably arranged in the compression chamber (5). The first screw (9) and the second screw (10) mesh with each other. The two ends of the first screw (9) and the second screw (10) are rotatably connected to the first end cover (6) and the second end cover (7) through the stabilizing bearing (11). The oil inlet mechanism includes a processing cylinder (12), an oil inlet pipe (13), a filter mechanism, an oil delivery pipe (17), a nozzle (18), an outer protective pipe (19), a connecting hole (20), a nozzle (21), an oil distribution port (22), and a threaded oil delivery groove (23). The processing cylinder (12) is installed below the housing (1) and is connected to the oil inlet pipe (13). The processing cylinder (12) is equipped with a filter mechanism inside. The processing cylinder (12) is connected to the nozzle (18) through the oil delivery pipe (17). The nozzle (18) extends into the compression chamber (5). One end of the outer wall of the multiple nozzles (18) is connected to a protective mechanism. The temperature control mechanism includes a temperature control box (24), a through hole (25), a return water pipe (26), a mounting block (27), a spray head (28), a spray hole (29), a cold water supply pipe (30), and a hot water supply pipe (31). The temperature control box (24) is fitted on the outer wall of the oil supply pipe (17) and is used to adjust the temperature of the lubricating oil in the oil supply pipe (17).

2. The composite solar-powered air-cooled screw parallel compressor according to claim 1, characterized in that, An air inlet pipe (2) is connected to the top of the housing (1), a connecting seat (3) is connected to the bottom side of the housing (1), an air outlet (4) is opened at the bottom of the housing (1) and the connecting seat (3), and the air inlet pipe (2) is located above the housing (1) and communicates with the compression chamber (5).

3. A composite solar-powered air-cooled screw compressor in parallel as described in claim 1, characterized in that, One end of the rotating shaft (8) passes through the first end cover (6) and extends into the compression chamber (5). The first screw (9) is fixedly connected to one end of the rotating shaft (8). The second screw (10) is rotatably connected to one side of the inner wall of the first end cover (6). The first screw (9) and the second screw (10) have opposite thread directions and mesh with each other.

4. A composite solar-powered air-cooled screw compressor in parallel as described in claim 1, characterized in that, The filtration mechanism includes a filter cartridge (14), a cleaning motor (15), and a cleaning scraper (16). The filter cartridge (14) is installed on one side of the inner wall of the processing cylinder (12). The cleaning motor (15) is installed at one end of the processing cylinder (12). The output end of the cleaning motor (15) passes through the processing cylinder (12) and the filter cartridge (14) in sequence and extends into the interior of the filter cartridge (14). The output end of the cleaning motor (15) is connected to the cleaning scraper (16). The cleaning scraper (16) slides in cooperation with the inner wall of the filter cartridge (14).

5. A composite solar-powered air-cooled screw compressor in parallel as described in claim 1, characterized in that, There are two oil delivery pipes (17) arranged symmetrically. One end of each oil delivery pipe (17) is connected to the processing cylinder (12), and the other end of each oil delivery pipe (17) extends through to the inside of the connecting seat (3). The connecting seat (3) has mounting holes for each of the two oil delivery pipes (17). The two oil delivery pipes (17) are respectively installed in the two mounting holes. The upper ends of each oil delivery pipe (17) are connected to multiple nozzles (18). The multiple nozzles (18) above one oil delivery pipe (17) and the multiple nozzles (18) above the other oil delivery pipe (17) are arranged alternately along the axial direction of the housing (1). The multiple nozzles (18) pass through the connecting seat (3) and the housing (1) and extend into the inside of the compression chamber (5).

6. A composite solar-powered air-cooled screw compressor in parallel as described in claim 1, characterized in that, The protective mechanism includes an outer protective tube (19), which is sleeved on one side of the outer wall of the nozzle (18). The connecting seat (3) and the housing (1) are provided with connecting holes (20) at the locations of multiple nozzles (18). The multiple nozzles (18) and the outer protective tube (19) are all inserted into the corresponding connecting holes (20).

7. A composite solar-powered air-cooled screw compressor in parallel as described in claim 6, characterized in that, One end of each of the multiple nozzles (18) is connected to a nozzle (21), the nozzle (21) is located inside the corresponding outer protective tube (19), the outer wall of the nozzle (18) is provided with an oil distribution port (22) in the circumferential direction, and the inner wall of the outer protective tube (19) is provided with a threaded oil delivery groove (23) at each of the multiple oil distribution ports (22).

8. A composite solar-powered air-cooled screw compressor in parallel as described in claim 5, characterized in that, The spray direction of one of the nozzles (21) above the oil pipe (17) is toward the root circle of the corresponding first screw (9), and the spray direction of the nozzle (21) above the other oil pipe (17) is toward the root circle of the corresponding second screw (10).

9. A composite solar-powered air-cooled screw compressor in parallel as described in claim 1, characterized in that, The temperature control box (24) is installed on one side of the processing cylinder (12) and sleeved on the outer wall of the two oil supply pipes (17). The temperature control box (24) is open on one side corresponding to the cleaning motor (15). The temperature control box (24) is provided with a through hole (25). The two oil supply pipes (17) pass through the corresponding through hole (25). The inner wall of the through hole (25) is embedded with a sealing ring. The sealing ring is connected to the outer wall of the oil supply pipe (17). The lower end of the temperature control box (24) is connected to a return water pipe (26). The upper end of the inner wall of the temperature control box (24) is provided with an installation block (27). The lower end of the installation block (27) is provided with a spray head (28). The spray head (28) is provided with a spray hole (29) below it. The upper two sides of the temperature control box (24) are respectively connected to a cold water supply pipe (30) and a hot water supply pipe (31). The hot water supply pipe (31) is connected to a solar thermal storage device.

Images