Oil-free screw blower

Abstract

The application relates to the technical field of air blowers, and discloses an oil-free screw blower, which comprises a base, the top of the base is fixedly connected with an adjusting mechanism, the adjusting mechanism comprises a mounting frame and a middle support, the mounting frame is fixedly connected to the middle part of the top end of the base, the top left side of the mounting frame is provided with a driving motor, the top right side of the mounting frame is provided with a machine head, the driving motor is in transmission connection with the machine head through the middle support, the bottom of the machine head is in communication with a connecting pipe, the bottom of the connecting pipe is provided with a connecting ring, and the inner side of the connecting pipe is fixedly connected with a plurality of mounting seats at equal intervals. The gear is driven to rotate by a servo motor, the connecting ring is driven to rotate by the meshing effect of the tooth grooves on the outer side of the connecting ring and the gear, the connecting seat is moved by a connecting rod, and then a plurality of arc-shaped baffles are simultaneously driven to rotate inwards or outwards, so that the air flow in the connecting pipe is changed, and active adjustment of the gas pressure in the blower is realized.

Description

Technical Field

[0001] This invention relates to the field of blower technology, specifically to an oil-free screw blower. Background Technology

[0002] As a type of fluid machinery that converts the mechanical energy of a prime mover into gas pressure energy, a blower is mainly used to provide air at a certain pressure and flow rate to meet the process requirements of aeration, material conveying, or combustion.

[0003] As an advanced positive displacement rotary machine, the oil-free screw blower achieves internal gas compression through its unique twin-screw meshing compression principle. It boasts significant advantages such as high efficiency, low noise, stable operation, and completely oil-free exhaust. Compared to traditional Roots blowers, the oil-free screw blower has a more obvious energy efficiency advantage under high-pressure conditions. Furthermore, since no lubricating oil is required to seal the compression chamber, the cleanliness of the output gas can be guaranteed. Therefore, it has gradually become the mainstream gas source equipment in water treatment and high-precision industries.

[0004] Existing oil-free screw blowers typically operate by a motor driving the main unit head to rotate at high speed via a coupling or belt. Air is compressed and delivered to the user end through an exhaust pipe. However, in actual use, the high operating speed of the screw blower generates significant vibration between the main unit head and the motor. Current installation methods often employ simple bolted rigid connections or rubber pads on the foundation. While these solve the basic fixing problem, their ability to absorb high-frequency vibrations is limited. Over long-term operation, the overall impact force on the equipment remains high, easily leading to loosening of connecting parts or cracking of pipe welds, affecting the operational stability of the equipment. To address these issues, existing technologies add vibration-damping structures to the blower head or the bottom of the motor to reduce equipment vibration. In actual operating conditions, it is often necessary to dynamically adjust the exhaust pressure and flow rate of the blower. Existing technologies usually use frequency converters to adjust the motor speed or install throttle valves on the exhaust pipe to solve this problem. However, the motor efficiency decreases and heat dissipation deteriorates when operating at low frequencies. When using an external butterfly valve for throttling, since the butterfly valve is usually a single-plate structure, the rotation of the valve plate will cause the airflow cross-section in the pipeline to be asymmetrical, resulting in airflow deviation and turbulence. This not only increases airflow noise, but also generates uneven impact pressure on the pipe wall. It is impossible to achieve active, rapid and uniform management of the gas pressure state in the blower. As a result, when dealing with high pressure and variable operating conditions, the equipment has a slow adjustment response speed and insufficient safety, and cannot achieve rapid adaptation of pressure and flow. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an oil-free screw blower that solves the problem that existing oil-free screw blowers cannot achieve uniform and synchronous adjustment of the cross-sectional area of ​​the airflow channel inside the connecting pipe, resulting in an inability to actively manage the exhaust pressure state and difficulty in quickly and safely adapting to high pressure and changing operating conditions.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an oil-free screw blower, comprising a base, an adjustment mechanism fixedly connected to the top of the base for convenient adjustment of the internal pressure of the blower, a filter mechanism provided on the top right side of the base for filtering the air entering the blower, and a cooling mechanism provided on the top left side of the base for cooling the blower.

[0007] The adjustment mechanism includes a mounting frame and a center support. The mounting frame is fixedly connected to the top center of the base. A drive motor is located on the top left side of the mounting frame, and a machine head is located on the top right side of the mounting frame. The drive motor is connected to the machine head via the center support. A connecting pipe is connected to the bottom of the machine head, and a connecting ring is located at the bottom of the connecting pipe. Multiple mounting seats are fixedly connected at equal intervals on the inner side of the connecting pipe. An arc-shaped baffle is rotatably connected to the outer side of the mounting seats. A servo motor is fixedly connected to the top right end of the inner side of the mounting frame. A gear is fixedly connected to the output end of the servo motor. A toothed groove is formed on the outer side of the connecting ring, and the gear meshes with the toothed groove. Multiple connecting rods are rotatably connected at equal intervals on the inner side of the connecting ring. A connecting seat is located on the outer side of the arc-shaped baffle, and the connecting seat is rotatably connected to the connecting rod.

[0008] Preferably, the filtration mechanism includes an air intake silencer box, which is fixedly connected to the top right side of the base. The top of the air intake silencer box is connected to an air filter box, and the left side of the air filter box is connected to an air supply pipe. The bottom of the air supply pipe is connected to the machine head. An air filter element is installed inside the air filter box. An outer shell is fixedly connected to the left side of the air filter box. A movable ring is rotatably connected to the right side of the outer shell. A support plate is fixedly connected to the left side of the movable ring. Curved grooves are formed around the outer perimeter of the support plate. A plug-in post is slidably connected to the inner side of the curved groove. A movable block is fixedly connected to the left end of the plug-in post. A fixing clip is fixedly connected to one side of the movable block. A wedge-shaped surface is formed on the inner side of the fixing clip. The fixing clip engages with the air filter element.

[0009] Preferably, the cooling mechanism includes an oil tank, which is fixedly connected to the top left side of the base. An oil pump is fixedly connected to the top front side of the base. The input end of the oil pump is connected to the oil tank, and the output end of the oil pump is connected to an oil delivery pipe two. An oil delivery pipe one is connected to the right side of the oil tank. A cooler is provided on the upper side of the base. A fan is fixedly connected to the bottom of the cooler. An oil distributor is connected to the right side of the cooler. The outlet end of the cooler is connected to the oil delivery pipe one. The top of the oil delivery pipe two is connected to the oil distributor. The bottom of the oil distributor is connected to an oil delivery pipe three. A heat exchange box is provided on the front side of the machine head. The bottom of the oil delivery pipe three is connected to the heat exchange box. The bottom of the heat exchange box is connected to a return oil pipe, and the front end of the return oil pipe is connected to the oil tank.

[0010] Preferably, the adjustment mechanism further includes a muffler, which is located at the top center of the base. The left end of the muffler is connected to a conveying pipe, the top of the conveying pipe is connected to a connecting ring, and an explosion-proof plate is provided on the rear side of the mounting base.

[0011] Preferably, the adjusting mechanism further includes sealing gaskets, with two sealing gaskets respectively disposed on the upper and lower sides of the connecting ring.

[0012] Preferably, the top of the mounting bracket is fixedly connected to a plurality of shock-absorbing pads, and the bottom of the drive motor and the machine head are respectively fixedly connected to the corresponding shock-absorbing pads.

[0013] Preferably, the filtration mechanism further includes a drive tooth, which is disposed on the rear side of the movable ring. A threaded rod is rotatably connected to the rear side of the air filter box, and a rack is threadedly connected to the outer side of the threaded rod. The rack meshes with the drive tooth, the bottom of the threaded rod penetrates through the air filter box, and the rear side of the rack is slidably connected to the inner side of the air filter box.

[0014] Preferably, the adjusting mechanism further includes a slide groove, and the connecting seat is slidably connected to the slide groove.

[0015] Preferably, the cooling mechanism further includes a pressure sensor, which is located at the bottom of the oil distributor, and a temperature sensor is located on the right side of the oil distributor.

[0016] Preferably, the cooling mechanism further includes a breather cap, which is disposed on the top of the oil tank, and the front side of the oil tank is connected to an oil drain port.

[0017] This invention provides an oil-free screw blower. It has the following beneficial effects:

[0018] 1. This invention uses a servo motor to drive a gear to rotate. The meshing action between the outer tooth groove of the connecting ring and the gear drives the connecting ring to rotate. The connecting rod then pushes the connecting seat to move, thereby causing multiple arc-shaped baffles to rotate inward or outward simultaneously. This changes the airflow inside the connecting pipe and achieves active regulation of the gas pressure inside the blower. It can quickly and safely adapt to high pressure and variable operating conditions.

[0019] 2. This invention uses a rotating threaded rod to drive a rack to move downwards. The rack engages with the outer drive teeth of the movable ring, causing the support plate to rotate. The curved groove on the support plate drives multiple insertion pins and movable blocks to move in all directions, thereby causing the fixing clip to simultaneously detach from the air filter element, thus realizing convenient disassembly and replacement of the air filter element.

[0020] 3. This invention uses an oil pump to deliver coolant from the oil tank to the oil distributor. The oil distributor controls the flow direction based on the coolant temperature. When the coolant is relatively cold, it flows through the oil pipe into the heat exchanger to directly cool the engine head. When the coolant is relatively hot, it first enters the cooler to work with the fan for heat dissipation and cooling, and then flows back to the oil tank through the oil pipe. This achieves intelligent control of the coolant circulation path. Combined with real-time monitoring by pressure and temperature sensors, it ensures efficient operation of the cooling system under different operating conditions and extends the service life of the equipment. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a rear view of the present invention;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0024] Figure 4 This is a partial structural illustration of the present invention;

[0025] Figure 5 This is a partial structural schematic diagram of the adjustment mechanism of the present invention;

[0026] Figure 6 This is a partial structural cross-sectional view of the present invention;

[0027] Figure 7 This is a partial structural exploded view of the adjustment mechanism of the present invention;

[0028] Figure 8 for Figure 7 Enlarged view of point B in the image;

[0029] Figure 9 This is a partial structural diagram of the present invention;

[0030] Figure 10This is a partial structural breakdown diagram of the present invention;

[0031] Figure 11 This is a partial structural diagram of the filtration mechanism of the present invention.

[0032] The components include: 1. Base; 2. Adjustment mechanism; 21. Mounting bracket; 22. Drive motor; 23. Center support; 24. Head unit; 25. Connecting pipe; 26. Connecting ring; 27. Mounting seat; 28. Servo motor; 29. ​​Gear; 210. Gear groove; 211. Connecting rod; 212. Arc-shaped baffle; 213. Connecting seat; 214. Slide groove; 215. Sealing gasket; 216. Conveying pipe; 217. Silencer; 218. Explosion-proof sheet; 219. Shock-absorbing pad; 3. Filtering mechanism; 31. Intake silencer box; 32. Air filter box; 33. Air supply pipe; 34. Air filter element; 35. 36. Outer shell; 37. Movable ring; 38. Support plate; 39. Curved groove; 30. Insertion post; 310. Movable block; 311. Fixing clip; 312. Drive gear; 313. Threaded rod; 314. Rack; 315. Wedge surface; 4. Cooling mechanism; 41. Oil tank; 42. Oil pump; 43. Oil supply pipe one; 44. Cooler; 45. Fan; 46. Oil supply pipe two; 47. Oil distributor; 48. Oil supply pipe three; 49. Heat exchanger; 410. Oil return pipe; 411. Pressure sensor; 412. Temperature sensor; 413. Breathing cap; 414. Oil drain port. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Reference Figure 1 , Figure 4 and Figure 5 This invention provides an oil-free screw blower, including a base 1. An adjustment mechanism 2 is fixedly connected to the top of the base 1. The adjustment mechanism 2 is used to conveniently adjust the internal pressure of the blower. A filter mechanism 3 is provided on the right side of the top of the base 1. The filter mechanism 3 is used to filter the air entering the blower. A cooling mechanism 4 is provided on the left side of the top of the base 1. The cooling mechanism 4 is used to cool the blower.

[0035] The adjustment mechanism 2 includes a mounting frame 21 and a middle support 23. The mounting frame 21 is fixedly connected to the top center of the base 1. A drive motor 22 is provided on the top left side of the mounting frame 21, and a machine head 24 is provided on the top right side of the mounting frame 21. The drive motor 22 is connected to the machine head 24 through the middle support 23. A connecting pipe 25 is connected to the bottom of the machine head 24. A connecting ring 26 is provided at the bottom of the connecting pipe 25. Multiple mounting seats 27 are fixedly connected at equal intervals on the inner side of the connecting pipe 25. An arc-shaped baffle 212 is rotatably connected to the outer side of the mounting seat 27. The arc-shaped baffle 212 can rotate around the mounting seat 27. A servo motor 28 is fixedly connected to the top right end of the inner side of the mounting frame 21. A gear 29 is fixedly connected to the output end of the servo motor 28. The servo motor 28 will drive the gear 29 to rotate. A toothed groove 210 is opened on the outer side of the connecting ring 26. The gear 29 is meshed with the toothed groove 210.

[0036] Reference Figure 6 , Figure 7 and Figure 8 Multiple connecting rods 211 are equidistantly rotatably connected to the inner side of the connecting ring 26. A connecting seat 213 is provided on the outer side of the arc-shaped baffle 212. The connecting seat 213 is rotatably connected to the connecting rods 211. When the connecting ring 26 rotates, the connecting rods 211 can push the connecting seat 213 to move. The adjusting mechanism 2 also includes a silencer 217, which is located at the top center of the base 1. The left end of the silencer 217 is connected to a conveying pipe 216. The top of the conveying pipe 216 is connected to the connecting ring 26. An explosion-proof plate 218 is provided on the rear side of the mounting base 27. The explosion-proof plate 218 can rupture when the internal pressure of the equipment is too high. The adjustment mechanism 2 also includes a sealing gasket 215. Two sealing gaskets 215 are respectively set on the upper and lower sides of the connecting ring 26. Multiple shock-absorbing pads 219 are fixedly connected to the top of the mounting bracket 21. The bottom of the drive motor 22 and the machine head 24 are respectively fixedly connected to the corresponding shock-absorbing pads 219. The adjustment mechanism 2 also includes a slide groove 214. The connecting seat 213 is slidably connected to the slide groove 214. The connecting seat 213 can slide in the slide groove 214, so that the connecting rod 211 will not get stuck.

[0037] Specifically, when using the oil-free screw blower, the drive motor 22 starts and runs, transmitting power to the blower head 24 via the support 23. Inside the blower head 24, the screw rotates at high speed, compressing the intake gas. The compressed high-pressure gas is then transported outwards via the connecting pipe 25. During this process, the shock-absorbing pad 219 on top of the mounting bracket 21 bears and buffers the mechanical vibrations generated by the drive motor 22 and the blower head 24, reducing rigid impact. When it is necessary to adjust the exhaust pressure or flow rate, the servo motor 28 is started. The servo motor 28 drives the gear 29 to rotate. The gear 29 meshes with the toothed grooves 210 on the outer circumference of the connecting ring 26, thereby driving the connecting ring 26 to rotate around the axis of the connecting pipe 25. The rotation of the connecting ring 26 causes multiple connecting rods 211 to shift. The connecting rods 211 pull the connecting seat 213 to slide in the slide groove 214, which in turn drives the arc-shaped baffle 212 installed on the mounting base 27 to rotate. Multiple arc-shaped baffles 212 move towards the center of the connecting pipe 25 or expand outwards, changing the effective cross-sectional area of ​​the airflow channel inside the connecting pipe 25, thereby adjusting the flow rate and pressure of the gas passing through, and achieving matching for variable working conditions and loads. The airflow generated by the blower is introduced into the silencer 217 through the delivery pipe 216 for noise reduction before being discharged. If the pressure inside the machine head 24 or pipeline rises abnormally and exceeds the set value, the explosion-proof plate 218 on the rear side of the mounting base 27 will rupture under pressure to release pressure and prevent damage to the main body of the equipment.

[0038] Reference Figure 9 , Figure 10 and Figure 11The filtration mechanism 3 includes an air intake silencer box 31, which is fixedly connected to the top right side of the base 1. An air filter box 32 is connected to the top of the air intake silencer box 31, and an air supply pipe 33 is connected to the left side of the air filter box 32. The bottom of the air supply pipe 33 is connected to the machine head 24. An air filter element 34 is installed inside the air filter box 32 to filter the air entering the equipment. A housing 35 is fixedly connected to the left side of the air filter box 32, and a movable ring 36 is rotatably connected to the right side of the housing 35. A support plate 37 is fixedly connected to the left side of the movable ring 36. Curved grooves 38 are formed around the outer perimeter of the support plate 37, and insertion posts 39 are slidably connected to the inner side of the curved grooves 38. A movable block 31 is fixedly connected to the left end of the insertion post 39. 0. A fixing clip 311 is fixedly connected to one side of the movable block 310. A wedge-shaped surface 315 is provided on the inner side of the fixing clip 311. The fixing clip 311 engages with the air filter element 34. The fixing clip 311 can fix the air filter element 34. The filter mechanism 3 also includes a drive tooth 312. The drive tooth 312 is located on the rear side of the movable ring 36. A threaded rod 313 is rotatably connected to the rear side of the air filter box 32. A rack 314 is threadedly connected to the outer side of the threaded rod 313. The rack 314 is meshed with the drive tooth 312. The bottom of the threaded rod 313 penetrates the air filter box 32. The rear side of the rack 314 is slidably connected to the inner side of the air filter box 32. The rotation of the threaded rod 313 will drive the rack 314 to move, and then drive the movable ring 36 to rotate through the drive tooth 312.

[0039] Specifically, during the blower's intake process, external air first passes through the intake silencer box 31 for noise reduction, then enters the air filter box 32. After the airflow passes through the air filter element 34 to remove particulate impurities, it is introduced into the compression chamber of the blower head 24 through the air delivery pipe 33. When the air filter element 34 needs to be replaced or maintained, the threaded rod 313 is rotated. The threaded rod 313 drives the rack 314 to move downwards in the vertical direction. The rack 314 meshes with the drive teeth 312 on the outer side of the movable ring 36, thereby driving the movable ring 36 and the fixedly connected support plate 37 to rotate. When the support plate 37 rotates, air flows through the air filter. The curved groove 38 can push the insertion post 39 to move radially, causing the movable block 310 and the fixing clip 311 to expand outwards in all directions, so that the fixing clip 311 separates from the edge of the air filter element 34, releasing the lock on the filter element, and the old filter element can be taken out. When installing the new filter element, the threaded rod 313 is rotated in the opposite direction, the rack 314 upward drive mechanism is reset, the fixing clip 311 is retracted towards the center, and the wedge-shaped surface 315 on the inner side of the fixing clip 311 contacts and squeezes the end face of the air filter element 34, tightly pressing the air filter element 34 onto the left end face inside the air filter box 32, completing the sealing and fixing.

[0040] Reference Figure 1 , Figure 2 and Figure 3The cooling mechanism 4 includes an oil tank 41, which is fixedly connected to the top left side of the base 1. An oil pump 42 is fixedly connected to the front top of the base 1. The input end of the oil pump 42 is connected to the oil tank 41, and the output end of the oil pump 42 is connected to an oil delivery pipe 46. An oil delivery pipe 43 is connected to the right side of the oil tank 41. A cooler 44 is installed on the upper side of the base 1. A fan 45 is fixedly connected to the bottom of the cooler 44. An oil distributor 47 is connected to the right side of the cooler 44. The oil distributor 47 is used to control the flow direction of the coolant. The front side of the outlet end of the cooler 44 is connected to the first oil delivery pipe 43. The top of the second oil delivery pipe 46 is connected to the oil distributor 47. The bottom of the oil distributor 47 is connected to a third oil delivery pipe 48. A heat exchange box 49 is installed on the front side of the engine head 24. The third oil delivery pipe 48... The bottom of 8 is connected to the heat exchange box 49. The bottom of the heat exchange box 49 is connected to the return oil pipe 410. The front end of the return oil pipe 410 is connected to the oil tank 41. The coolant in the heat exchange box 49 can enter the oil tank 41 through the return oil pipe 410. The cooling mechanism 4 also includes a pressure sensor 411. The pressure sensor 411 is located at the bottom of the oil distributor 47. A temperature sensor 412 is located on the right side of the oil distributor 47. The temperature sensor 412 and the pressure sensor 411 can continuously monitor the pressure and temperature of the coolant. The cooling mechanism 4 also includes a breather cap 413. The breather cap 413 is located at the top of the oil tank 41. The front side of the oil tank 41 is connected to the drain port 414. The breather cap 413 and the drain port 414 can add or drain coolant into the oil tank 41.

[0041] Specifically, oil pump 42 draws coolant from oil tank 41 and pumps it to oil distributor 47 via oil delivery pipe 2 46. Oil distributor 47 automatically distributes the flow direction according to the medium temperature. When the coolant temperature is lower than the set value, the fluid directly enters the heat exchange box 49 on the front side of the machine head 24 via oil delivery pipe 3 48 to perform heat exchange and cooling on the machine head 24. The fluid after heat exchange flows back to oil tank 41 via return oil pipe 410. When the coolant temperature is higher, oil distributor 47 guides the fluid to cooler 44, which, together with the forced air cooling of fan 45, reduces the liquid temperature. The cooled coolant returns to oil tank 41 via oil delivery pipe 1 43 for recycling. During operation, pressure sensor 411 and temperature sensor 412 detect the fluid pressure and temperature data in the pipeline in real time. Breather cap 413 is used to balance the air pressure inside and outside oil tank 41 and serves as a filling port. Waste coolant is discharged through drain port 414 on the front side of oil tank 41.

[0042] Working principle:

[0043] When using an oil-free screw blower, the drive motor 22 drives the blower head 24 through the central support 23. The blower head 24 operates through the connecting pipe 25, enabling air blowing. During operation, the vibration damping pad 219 dampens the drive motor 22 and the blower head 24, reducing overall equipment impact and improving operational stability. When adjusting the blower pressure, the servo motor 28 is activated, driving the gear 29 to rotate. Because the toothed groove 210 on the outer side of the connecting ring 26 meshes with the gear 29, the connecting ring 26 rotates accordingly. The rotation of the connecting ring 26, through the connecting pipe 25, causes air to blow. Rod 211 can push connecting seat 213 to move, thereby pushing arc baffle 212 to rotate. At this time, multiple arc baffles 212 will rotate inward or outward simultaneously, thereby changing the air flow inside connecting pipe 25, which can regulate the gas pressure inside the blower and actively manage the pressure state of the exhaust, thereby achieving rapid and safe adaptation to high pressure and changing working conditions. During blowing, the air will enter the silencer 217 through delivery pipe 216 to reduce the noise generated by the blower. When the pressure inside the equipment exceeds the safety threshold due to abnormal conditions, the explosion-proof plate 218 will rupture to release pressure, preventing the equipment from being damaged due to excessive pressure.

[0044] Furthermore, when using the blower, air first enters the intake silencer box 31, which is used to reduce intake noise. The air then passes through the air filter element 34 and is delivered to the machine head 24 via the air supply pipe 33, preventing impurities from damaging the machine head 24. When a large amount of impurities accumulates on the air filter element 34, rotating the threaded rod 313 causes the rack 314 to move downwards. Since the rack 314 meshes with the drive teeth 312 on the outer side of the movable ring 36, its downward movement drives the movable ring 36 to rotate. The movable ring 36 then rotates the support plate 37. The support plate 37 drives multiple plug-in posts 39 to move simultaneously to all sides through the curved groove 38, and then drives multiple fixing clips 311 to disengage from the air filter element 34 through the movable block 310, thereby releasing the limiting effect on the air filter element 34. This makes it easier to remove the air filter element 34 for replacement. When it is necessary to reinstall the new air filter element 34, the threaded rod 313 is rotated in the opposite direction, causing the fixing clips 311 on all sides to move simultaneously to the center. The wedge-shaped surface 315 on the fixing clips 311 can press the air filter element 34 into the inside left side of the air filter box 32, thus fixing the air filter element 34 firmly.

[0045] Finally, during the operation of the oil-free screw blower, the oil pump 42 draws coolant from the oil tank 41 and delivers it to the oil distributor 47 via the second oil pipe 46. When the coolant is relatively cold, the oil distributor 47 controls the coolant to flow into the heat exchange box 49 via the third oil pipe 48, thereby cooling the blower head 24. When the coolant is relatively hot, the oil distributor 47 controls the coolant to enter the cooler 44, and through the coordinated action of the cooler 44 and the fan 45, coolant is further cooled. The coolant is cooled, and the cooled coolant can enter the oil tank 41 for storage through the oil supply pipe 43. The coolant that has passed through the heat exchange box 49 can flow into the oil tank 41 through the return oil pipe 410. During the operation of the oil distributor 47, the pressure and temperature of the coolant can be monitored in real time through the pressure sensor 411 and the temperature sensor 412. Coolant can be added to the oil tank 41 through the breather cap 413 and the coolant in the oil tank 41 can be drained through the drain port 414.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil-free screw blower, comprising a base (1), characterized in that, An adjustment mechanism (2) is fixedly connected to the top of the base (1). The adjustment mechanism (2) is used to facilitate the adjustment of the internal pressure of the blower. A filter mechanism (3) is provided on the right side of the top of the base (1). The filter mechanism (3) is used to filter the air entering the blower. A cooling mechanism (4) is provided on the left side of the top of the base (1). The cooling mechanism (4) is used to cool the blower. The adjustment mechanism (2) includes a mounting frame (21) and a center support (23). The mounting frame (21) is fixedly connected to the top center of the base (1). A drive motor (22) is provided on the top left side of the mounting frame (21), and a machine head (24) is provided on the top right side of the mounting frame (21). The drive motor (22) is connected to the machine head (24) through the center support (23). A connecting pipe (25) is connected to the bottom of the machine head (24). A connecting ring (26) is provided at the bottom of the connecting pipe (25). Multiple mounting seats (26) are fixedly connected at equal intervals on the inner side of the connecting pipe (25). 7) An arc-shaped baffle (212) is rotatably connected to the outer side of the mounting base (27). A servo motor (28) is fixedly connected to the top right end of the inner side of the mounting bracket (21). A gear (29) is fixedly connected to the output end of the servo motor (28). A toothed groove (210) is opened on the outer side of the connecting ring (26). The gear (29) meshes with the toothed groove (210). Multiple connecting rods (211) are rotatably connected at equal intervals on the inner side of the connecting ring (26). A connecting seat (213) is provided on the outer side of the arc-shaped baffle (212). The connecting seat (213) is rotatably connected to the connecting rod (211). The filtration mechanism (3) includes an air intake silencer box (31), which is fixedly connected to the top right side of the base (1). The top of the air intake silencer box (31) is connected to an air filter box (32), and the left side of the air filter box (32) is connected to an air supply pipe (33). The bottom of the air supply pipe (33) is connected to the machine head (24). An air filter element (34) is installed inside the air filter box (32). An outer shell (35) is fixedly connected to the left side of the inside of the air filter box (32), and a movable ring is rotatably connected to the right side of the outer shell (35). 36), a support plate (37) is fixedly connected to the left side of the movable ring (36). Curved grooves (38) are provided around the outer perimeter of the support plate (37). A plug-in post (39) is slidably connected to the inner side of the curved groove (38). A movable block (310) is fixedly connected to the left end of the plug-in post (39). A fixing clip (311) is fixedly connected to one side of the movable block (310). A wedge-shaped surface (315) is provided on the inner side of the fixing clip (311). The fixing clip (311) engages with the air filter element (34).

2. The oil-free screw blower according to claim 1, characterized in that, The cooling mechanism (4) includes an oil tank (41), which is fixedly connected to the top left side of the base (1). An oil pump (42) is fixedly connected to the top front side of the base (1). The input end of the oil pump (42) is connected to the oil tank (41), and the output end of the oil pump (42) is connected to an oil supply pipe (46). An oil supply pipe (43) is connected to the right side of the oil tank (41). A cooler (44) is provided on the upper side of the base (1). A fan (45) is fixedly connected to the bottom of the cooler (44). The right side of the cooler (44) is connected to an oil distributor (47). The outlet end of the cooler (44) is connected to the first oil pipe (43). The top of the second oil pipe (46) is connected to the oil distributor (47). The bottom of the oil distributor (47) is connected to the third oil pipe (48). A heat exchange box (49) is provided on the front side of the machine head (24). The bottom of the third oil pipe (48) is connected to the heat exchange box (49). The bottom of the heat exchange box (49) is connected to the return oil pipe (410). The front end of the return oil pipe (410) is connected to the oil tank (41).

3. The oil-free screw blower according to claim 1, characterized in that, The adjustment mechanism (2) also includes a silencer (217), which is located at the top center of the base (1). The left end of the silencer (217) is connected to a conveying pipe (216), and the top of the conveying pipe (216) is connected to a connecting ring (26). An explosion-proof plate (218) is provided on the rear side of the mounting base (27).

4. An oil-free screw blower according to claim 3, characterized in that, The adjustment mechanism (2) also includes a sealing gasket (215), and the two sealing gaskets (215) are respectively disposed on the upper and lower sides of the connecting ring (26).

5. An oil-free screw blower according to claim 1, characterized in that, The top of the mounting bracket (21) is fixedly connected with multiple shock-absorbing pads (219), and the bottom of the drive motor (22) and the head (24) are respectively fixedly connected to the corresponding shock-absorbing pads (219).

6. An oil-free screw blower according to claim 1, characterized in that, The filtration mechanism (3) also includes a drive tooth (312), which is located on the rear side of the movable ring (36). A threaded rod (313) is rotatably connected to the rear side of the air filter box (32). A rack (314) is threadedly connected to the outer side of the threaded rod (313). The rack (314) meshes with the drive tooth (312). The bottom of the threaded rod (313) penetrates the air filter box (32). The rear side of the rack (314) is slidably connected to the inner side of the air filter box (32).

7. An oil-free screw blower according to claim 1, characterized in that, The adjustment mechanism (2) also includes a slide groove (214), and the connecting seat (213) is slidably connected to the slide groove (214).

8. An oil-free screw blower according to claim 2, characterized in that, The cooling mechanism (4) also includes a pressure sensor (411), which is located at the bottom of the oil distributor (47), and a temperature sensor (412) is located on the right side of the oil distributor (47).

9. An oil-free screw blower according to claim 2, characterized in that, The cooling mechanism (4) also includes a breathing cap (413), which is located on the top of the oil tank (41), and the front side of the oil tank (41) is connected to an oil drain port (414).

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