An oil-free screw air compressor

Abstract

This invention relates to the field of air compressor technology and provides an oil-free screw air compressor, comprising: a base and an oil-free screw air compressor body, the compressor body being mounted on the base by screws; the compressor body housing having a jacketed cooling chamber for injecting coolant to cool the compressor body; and a support frame fixed to the top of the base for mounting a coolant delivery mechanism, the coolant delivery mechanism being fixed to the top of the support frame and used to deliver coolant to the jacketed cooling chamber of the housing. Compared to the traditional method of directly cooling the screw with cold water, the oil-free screw air compressor provided by this solution does not contact the coolant, eliminating the need for subsequent gas-liquid separation and complex gas-liquid separation equipment. This significantly reduces the complexity of air compressor operation, lowers manufacturing costs, reduces the probability of equipment failure, and improves operational reliability.

Description

Technical Field

[0001] This invention belongs to the field of air compressor technology, and particularly relates to an oil-free screw air compressor. Background Technology

[0002] In existing oil-free screw air compressor technology, the absence of oil to cool the compressed air screw significantly increases the cleanliness of the compressed air. Current technology typically uses water cooling to directly cool the screw before gas-liquid separation. This method has some drawbacks. The complex gas-liquid separation process not only increases the manufacturing cost of the equipment but also increases the probability of malfunctions during operation, requiring more maintenance. Summary of the Invention

[0003] To address the technical problems of complex subsequent gas-liquid separation processes and high equipment costs in existing oil-free screw air compressors with direct water cooling, this invention provides an oil-free screw air compressor.

[0004] This invention is implemented as follows: an oil-free screw air compressor includes: a base and an oil-free screw air compressor body, the oil-free screw air compressor body being mounted on the base by screws, the casing of the oil-free screw air compressor body having a jacketed cooling chamber for injecting coolant to cool the oil-free screw air compressor body; a support frame fixed to the top of the base for mounting a liquid delivery mechanism, the liquid delivery mechanism being fixed to the top of the support frame and used to deliver coolant to the jacketed cooling chamber of the casing.

[0005] Preferably, the oil-free screw air compressor body further includes a female screw and a male screw assembled in the inner chamber of the housing. The female screw and the male screw mesh with each other to compress air when rotating. Both ends of the female screw and the male screw are provided with an integrally formed central shaft. Two meshing spur gears are fixedly sleeved on the two central shafts at the same end of the female screw and the male screw.

[0006] Preferably, the front end of the housing is open and equipped with a front cover. The central shafts at both ends of the female screw and the male screw are rotatably connected to the housing and the front cover respectively through sealed bearings. The rear end of the housing and the front end of the front cover are respectively equipped with a rear cover and a front cover. A gear chamber for accommodating two spur gears is formed between the rear cover and the housing.

[0007] Preferably, a cooling tank for storing coolant is fixedly installed on the support frame, and a top cover is installed on the top opening of the cooling tank. A liquid filling hopper is provided on the top cover, and a hopper cover with vent holes is threaded onto the liquid filling hopper.

[0008] Preferably, a motor is fixedly installed on the base, and its output shaft is connected to one end of any central shaft via a coupling to provide power for the operation of the oil-free screw air compressor body.

[0009] Preferably, the jacketed cooling cavity of the housing is equipped with multiple partition plates to increase the strength of the housing and divide the jacketed cooling cavity into multiple sub-chambers. The partition plates are provided with several connecting holes to connect adjacent sub-chambers.

[0010] Preferably, the infusion mechanism includes: a pump casing fixedly installed on the top of the support frame, with an impeller assembled inside the pump casing; a first wheel shaft rotatably installed inside the pump casing via a sealed bearing, the impeller being fixedly sleeved on the first wheel shaft, one end of the first wheel shaft extending outside the pump casing; an inlet pipe connected to the inlet of the pump casing, one end of the inlet pipe extending into the cooling tank; an outlet pipe fixedly installed on the outlet of the pump casing, one end of the outlet pipe being connected to an inlet horizontal pipe; wherein, the bottom and top of the casing are each equipped with multiple branch pipes respectively connected to each of the sub-chambers, the multiple branch pipes at the bottom of the casing being connected and communicating with the inlet horizontal pipe; a return horizontal pipe installed at the top of the multiple branch pipes at the top of the casing, one end of the return horizontal pipe being connected to a spray pipe, and the bottom of the section of the spray pipe extending into the cooling tank having a diversion hole.

[0011] Preferably, the return pipe is equipped with heat dissipation fins to dissipate heat and cool the cooled liquid after it has been heated in the return pipe during the return process.

[0012] Preferably, the top cover is equipped with two fixed heat dissipation components for cooling the coolant that is heated and flows back into the cooling box. The fixed heat dissipation components include a mounting plate fixed on the top cover. The top and bottom of the mounting plate are respectively provided with lower fins and upper fins. The lower fins extend into the coolant in the cooling box to conduct and absorb heat from the heated and flowing coolant, and transfer the heat to the upper fins to transfer the heat to the external environment.

[0013] Preferably, the support frame is further equipped with a wind-cooling mechanism for blowing air onto the upper fins to accelerate heat dissipation. The wind-cooling mechanism includes: a fan housing fixedly installed on the top of the support frame, with an air inlet at one end of the fan housing and a second wheel shaft rotatably installed inside the fan housing via a sealed bearing; a fan wheel fixedly sleeved on the second wheel shaft; an air outlet pipe fixedly installed on the air outlet of the fan housing; and a diffuser plate fixedly installed on the top cover and located between two fixed heat dissipation components. The diffuser plate has an inner cavity and a communication port connected to the air outlet pipe, and multiple air outlet holes are opened on both sides of the diffuser plate for blowing air onto the upper fins on the two mounting plates.

[0014] Preferably, the support frame is further equipped with a transmission assembly for providing driving force to the infusion mechanism and the air-cooling mechanism using motor power. The transmission assembly includes: a fixed block fixedly installed between two support legs of the support frame, on which a horizontally arranged mounting shaft is rotatably mounted via bearings; a transmission rubber roller fixedly sleeved on the mounting shaft and a drive rubber roller fixedly sleeved on the motor output shaft, the transmission rubber roller and the drive rubber roller being in close contact; a connecting shaft fixedly connected to the first wheel shaft and the second wheel shaft respectively via two couplings; and two pulleys fixedly sleeved on the connecting shaft and the mounting shaft, the two pulleys being driven by a belt.

[0015] Preferably, the housing is provided with heat dissipation fins to dissipate the heat generated by the female and male screws when compressing air to the external environment.

[0016] Compared with related technologies, the oil-free screw air compressor provided by the present invention has the following beneficial effects:

[0017] The oil-free screw air compressor body of the present invention has a jacketed cooling chamber on the casing. Coolant is injected into the jacketed cooling chamber through a liquid delivery mechanism to cool the oil-free screw air compressor body. Compared with the traditional method of directly cooling the screw with cold water, this cooling method ensures that the compressed air does not come into contact with the coolant, eliminating the need for subsequent gas-liquid separation and complex gas-liquid separation equipment. This significantly reduces the complexity of air compressor operation, lowers manufacturing costs, reduces the probability of equipment failure, and improves the reliability of equipment operation.

[0018] Meanwhile, the fixed heat dissipation components on the top of the cooling box can cool the coolant that flows back into the cooling box after heating, and the air-cooling mechanism can blow air onto the upper fins to accelerate heat dissipation. These heat dissipation measures work together to improve the overall heat dissipation performance of the oil-free screw air compressor from multiple aspects, which helps to extend the service life of the equipment.

[0019] The transmission components mounted on the support frame can use the power of the motor to provide driving force for the infusion mechanism and the air-cooling mechanism. This design achieves efficient use of power, eliminating the need to set up separate power sources for the infusion mechanism and the air-cooling mechanism, further simplifying the equipment structure and reducing the energy consumption and cost of the equipment. Attached Figure Description

[0020] Figure 1 A side view of an oil-free screw air compressor provided by the present invention;

[0021] Figure 2 A side sectional view of an oil-free screw air compressor provided by the present invention;

[0022] Figure 3 for Figure 2An enlarged structural diagram of part A shown in the figure;

[0023] Figure 4 for Figure 2 An enlarged structural diagram of part B shown in the figure;

[0024] Figure 5 for Figure 2 An enlarged structural diagram of section C shown in the figure;

[0025] Figure 6 for Figure 2 An enlarged structural diagram of part D shown in the figure;

[0026] Figure 7 for Figure 2 An enlarged structural diagram of part E shown in the figure;

[0027] Figure 8 This is a front view structural diagram of the body of the oil-free screw air compressor in this invention;

[0028] Figure 9 This is a top view of the top cover structure in this invention;

[0029] Figure 10 This is a three-dimensional structural diagram of the heat sink in this invention;

[0030] Figure 11 This is a three-dimensional structural diagram of the mounting plate and the upper and lower fins in this invention;

[0031] Figure 12 This is a three-dimensional structural diagram of the base in this invention;

[0032] Figure 13 This is a front view structural diagram of the fixing block, mounting shaft, and support frame in this invention.

[0033] Reference numerals: 1. Base; 2. Housing; 3. Female screw; 4. Male screw; 5. Central shaft; 6. Spur gear; 7. Motor; 8. Partition plate; 9. Jacketed cooling chamber; 10. Support frame; 11. Cooling box; 12. Top cover; 13. Liquid filling hopper; 14. Pump housing; 15. Impeller; 16. First impeller shaft; 17. Inlet pipe; 18. Outlet pipe; 19. Inlet horizontal pipe; 20. Branch pipe; 21. Return horizontal pipe; 22. Spray pipe; 23. Heat dissipation fins; 24. Installation. 25. Plate; 26. Lower fin; 27. Upper fin; 28. Fan housing; 29. ​​Second wheel shaft; 30. Fan wheel; 31. Air outlet duct; 32. Air diffuser; 33. Air outlet hole; 34. Fixing block; 35. Mounting shaft; 36. Drive rubber roller; 37. Connecting shaft; 38. Pulley; 39. Belt; 201. Inner chamber of the housing; 202. Gear chamber; 203. Rear cover; 204. Front cover; 205. Front cover; 206. Heat dissipation fins. Detailed Implementation

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the terms "comprising" and "having," and any variations thereof, in the specification and the foregoing drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification and the foregoing drawings are used to distinguish different objects, not to describe a particular order.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] This invention provides an oil-free screw air compressor, such as... Figure 1-13 As shown, the oil-free screw air compressor includes: a base 1 and an oil-free screw air compressor body. The oil-free screw air compressor body is mounted on the base 1 by screws. The housing 2 of the oil-free screw air compressor body is provided with a jacketed cooling chamber 9 for injecting coolant to cool the oil-free screw air compressor body. A support frame 10 is fixed on the top of the base 1 for installing a liquid delivery mechanism. The liquid delivery mechanism is fixed on the top of the support frame 10 and is used to deliver coolant to the jacketed cooling chamber 9 of the housing 2.

[0037] In this embodiment, the base 1 provides a stable support foundation for the entire oil-free screw air compressor. The compressor body is the core component, and the jacketed cooling chamber 9 of the housing 2 plays a crucial cooling role. Coolant is injected into the compressor body to cool it. The support frame 10 is used to install the coolant delivery mechanism, which accurately delivers the coolant to the jacketed cooling chamber 9, ensuring continuous cooling. This structural design brings several beneficial effects. First, the design of the jacketed cooling chamber 9 makes cooling more uniform, avoiding localized overheating and improving the overall operational stability of the oil-free screw air compressor. Second, compared to traditional oil-free screw air compressors, this integrated cooling structure prevents compressed air from contacting the coolant, eliminating the need for subsequent gas-liquid separation and complex gas-liquid separation equipment. This significantly reduces the complexity of compressor operation, lowers manufacturing costs, reduces the probability of equipment failure, and improves operational reliability.

[0038] In a further preferred embodiment of the present invention, the oil-free screw air compressor body further includes a female screw 3 and a male screw 4 assembled in the inner chamber 201 of the housing 2. The female screw 3 and the male screw 4 mesh with each other to compress air when rotating. Both ends of the female screw 3 and the male screw 4 are provided with an integrally formed central shaft 5. Two meshing spur gears 6 are fixedly sleeved on the two central shafts 5 at the same end of the female screw 3 and the male screw 4.

[0039] In this embodiment, the housing 2 provides a space, namely the inner chamber 201, for accommodating the female screw 3 and the male screw 4. The female screw 3 and the male screw 4 rotate by meshing with each other to achieve the function of compressing air. The integrally formed central shaft 5 at both ends of the female screw 3 and the male screw 4 provides support for their rotation and serves as the basis for power transmission. Two meshing spur gears 6 fixedly fitted on the two central shafts 5 at the same end of the female screw 3 and the male screw 4 play a role in transmission and coordinated work. When power is transmitted to one of the central shafts 5, the meshing of the spur gear 6 drives the other central shaft 5 to rotate, thereby ensuring that the female screw 3 and the male screw 4 rotate synchronously and stably to perform air compression.

[0040] The meshing structure of the female screw 3 and male screw 4 makes the air compression process efficient and stable, ensuring the normal operation of the air compressor. The spur gear 6 ensures the synchronization of the rotation of the female screw 3 and male screw 4, reducing vibration and noise caused by asynchrony, improving the smoothness of equipment operation, and also helping to maintain the stability of the air compression process.

[0041] In a further preferred embodiment of the present invention, the front end of the housing 2 is open and a front end cover 204 is installed thereon. The central shafts 5 at both ends of the female screw 3 and the male screw 4 are rotatably connected to the housing 2 and the front end cover 204 respectively through sealed bearings. The rear end of the housing 2 and the front end of the front end cover 204 are respectively equipped with a rear cover 203 and a front cover 205. A gear chamber 202 for accommodating two spur gears 6 is formed between the rear cover 203 and the housing 2.

[0042] In this embodiment, a front cover 204 is installed at the opening at the front end of the housing 2. The central shafts 5 at both ends of the female screw 3 and the male screw 4 are rotatably connected to the housing 2 and the front cover 204 via sealed bearings. This sealed bearing connection method ensures smooth rotation of the central shaft 5 while preventing air or coolant leakage. The rear cover 203 at the rear end of the housing 2 and the front cover 205 at the front end of the front cover 204 serve a sealing function. The gear chamber 202 formed between the rear cover 203 and the housing 2 is used to accommodate two spur gears 6, providing a stable working space for the spur gears 6.

[0043] The use of sealed bearings ensures the equipment's sealing performance, maintains a stable internal working environment, and helps improve the efficiency and compressed air quality of the oilless screw air compressor. The rear cover 203 and front cover 205 enhance the overall sealing of the equipment, reducing external interference with internal components and lowering the likelihood of malfunctions. The gear chamber 202 allows the spur gear 6 to operate within a suitable space, ensuring the accuracy and stability of the transmission between the female screw 3 and male screw 4, thereby improving the overall reliability and stability of the oilless screw air compressor and reducing vibration and noise during operation. The outer wall of the gear chamber 202 also has an oil injection hole (not shown in the figure) for injecting lubricating oil and is fitted with a sealing cover.

[0044] In a further preferred embodiment of the present invention, a cooling tank 11 for storing coolant is fixedly installed on the support frame 10. A top cover 12 is installed on the top opening of the cooling tank 11. A liquid filling hopper 13 is provided on the top cover 12. A hopper cover with a vent hole is threaded onto the liquid filling hopper 13.

[0045] In this embodiment, the cooling tank 11 ensures a stable storage space for the coolant, guaranteeing continuous cooling of the oil-free screw air compressor. The design of the top cover 12 and the filling hopper 13 makes adding coolant convenient and quick, requiring no complicated operations. The design of the hopper cover and vent holes protects the coolant from external contamination and prevents excessive air pressure above the coolant in the cooling tank 11 due to temperature rise. This improves the ease of maintenance of the entire oil-free screw air compressor, reduces the possibility of equipment failure due to coolant issues, and contributes to the stable operation of the equipment.

[0046] In a further preferred embodiment of the present invention, a motor 7 is fixedly installed on the base 1, and its output shaft is connected to one end of any central shaft 5 through a coupling to provide power for the operation of the oilless screw air compressor body.

[0047] In this embodiment, the motor 7 is mounted on the base 1, providing a stable structure and a reliable power source for the entire device. The connection between the motor 7 and the central shaft 5 is simple and direct, effectively transmitting power to the female screw 3 and the male screw 4, ensuring the normal operation of the oil-free screw air compressor, improving equipment efficiency, reducing potential malfunctions due to unstable power transmission, and ensuring the stability and reliability of equipment operation.

[0048] In a further preferred embodiment of the present invention, a plurality of partition plates 8 are installed in the interlayer cooling cavity 9 of the housing 2 to increase the strength of the housing 2 and to divide the interlayer cooling cavity 9 into a plurality of sub-chambers. The partition plates 2 are provided with a plurality of connecting holes that allow adjacent sub-chambers to communicate.

[0049] In this embodiment, the partition plate 8 increases the strength of the housing 2, making it less prone to damage during equipment operation and improving the overall structural stability of the equipment. The design of multiple chambers and connecting holes makes the flow path of the coolant in the jacketed cooling chamber 9 more complex, which helps the coolant to be distributed more evenly in the chamber, thereby improving the cooling effect, ensuring that the temperature of the oil-free screw air compressor is maintained within a suitable range during operation, reducing the possibility of failure caused by local overheating, and thus improving the reliability and service life of the equipment.

[0050] In a further preferred embodiment of the present invention, the infusion mechanism includes: a pump housing 14 fixedly installed on the top of the support frame 10, wherein an impeller 15 is assembled inside the pump housing 14; a first wheel shaft 16 rotatably installed inside the pump housing 14 via a sealed bearing, wherein the impeller 15 is fixedly sleeved on the first wheel shaft 16, and one end of the first wheel shaft 16 extends outside the pump housing 14; an inlet pipe 17 connected to the inlet of the pump housing 14, one end of the inlet pipe 17 extending into the cooling tank 11; and a device fixedly installed on the pump housing 14. The liquid outlet 18 on the 4 has a liquid outlet pipe 18, one end of which is connected to a liquid inlet horizontal pipe 19; wherein, the bottom and top of the housing 2 are each equipped with a plurality of branch pipes 20 that are respectively connected to each of the sub-chambers, and the plurality of branch pipes 20 at the bottom of the housing 2 are all connected to and communicate with the liquid inlet horizontal pipe 19; the liquid return horizontal pipe 21 is installed at the top of the plurality of branch pipes 20 at the top of the housing 2, one end of which is connected to a spray pipe 22, and the bottom of the section of the spray pipe 22 extending to the cooling box 11 is provided with a diversion hole.

[0051] In this embodiment, the fluid delivery mechanism enables coolant circulation. The impeller 15 inside the pump housing 14 rotates, drawing coolant from the cooling tank 11 through the inlet pipe 17 and delivering it via the outlet pipe 18, inlet horizontal pipe 19, and branch pipe 20 to the compartments of the jacketed cooling chamber 9 in the housing 2. The cooled coolant then returns to the cooling tank 11 via the top branch pipe 20, return horizontal pipe 21, spray pipe 22, and diversion holes. Sealed bearings ensure smooth rotation and good sealing of the first wheel shaft 16. The connection of multiple branch pipes 20 to the compartments ensures widespread and uniform distribution of coolant in the jacketed cooling chamber 9, improving cooling efficiency, ensuring stable operation of the oil-free screw air compressor, reducing the risk of overheating, and simultaneously improving resource utilization through coolant circulation.

[0052] In a further preferred embodiment of the present invention, heat dissipation fins 23 are installed on the return horizontal pipe 21 to dissipate heat and cool down the cooled liquid after it has been heated in the return horizontal pipe 21 during the return process.

[0053] In this embodiment, the heat dissipation fins 23 installed on the return horizontal pipe 21 can effectively reduce the temperature of the returning coolant. During the operation of the oil-free screw air compressor, after the coolant absorbs heat and heats up, when it flows back through the return horizontal pipe 21, the heat dissipation fins 23 accelerate the heat dissipation rate of the coolant by increasing the heat dissipation area, so that the temperature of the coolant is lower when it returns to the cooling tank 11. This can improve the cooling efficiency of the coolant, ensure that the coolant can continuously and effectively cool the oil-free screw air compressor, reduce the possibility of equipment failure due to excessively high coolant temperature, and help maintain the stable operation of the equipment.

[0054] In a further preferred embodiment of the present invention, two fixed heat dissipation components are installed on the top cover 12 for cooling the coolant that is heated and returned to the cooling tank 11. The fixed heat dissipation components include a mounting plate 24 fixed on the top cover 12. The top and bottom of the mounting plate 24 are respectively provided with a lower fin 25 and an upper fin 26. The lower fin 25 extends into the coolant in the cooling tank 11 to conduct and absorb heat from the heated and returned coolant, and transfers the heat to the upper fin 26 to transfer the heat to the external environment.

[0055] In this embodiment, the fixed heat dissipation assembly can effectively reduce the temperature of the recirculated coolant in the cooling tank 11. The lower fins 25 are immersed in the coolant to directly absorb heat, and then transfer the heat to the upper fins 26 to dissipate it to the external environment. In this way, the coolant can cool down more quickly, and can be more efficiently reused to cool the oil-free screw air compressor. This helps maintain the normal operating temperature of the equipment, reduces the risk of equipment failure due to excessively high coolant temperature, and ensures stable operation of the equipment.

[0056] In another embodiment of the present invention, the support frame 10 is further equipped with a wind-cooling mechanism for blowing air onto the upper fins 26 to accelerate heat dissipation. The wind-cooling mechanism includes: a fan housing 27 fixedly installed on the top of the support frame 10, with an air inlet at one end of the fan housing 27, and a second wheel shaft 28 rotatably installed inside the fan housing 27 via a sealed bearing; a fan wheel 29 fixedly sleeved on the second wheel shaft 28; an air outlet pipe 30 fixedly installed on the air outlet of the fan housing 27; and a diffuser plate 31 fixedly installed on the top cover 12 and located between two fixed heat dissipation components. The diffuser plate 31 has an inner cavity and a communication port connected to the air outlet pipe 30, and multiple air outlet holes 32 are opened on both sides of the diffuser plate 31 for blowing air onto the upper fins 26 on the two mounting plates 24.

[0057] In this embodiment, the air-cooling mechanism installed on the support frame 10 blows air onto the upper fins 26 of the fixed heat dissipation component to accelerate heat dissipation, which can significantly improve heat dissipation efficiency. The impeller 29 rotates inside the fan housing 27, and outside air enters the fan housing 27 through the air inlet, then enters the inner chamber through the connecting port of the air outlet 30 and the diffuser plate 31, and is then blown out from the air outlet 32, directly onto the upper fins 26. This accelerates the heat exchange between the upper fins 26 and the external environment. Combined with the heat conduction and absorption of the coolant by the lower fins 25, the coolant can cool down more quickly in the cooling box 11, thereby improving the cooling effect of the entire cooling system, ensuring stable operation of the oil-free screw air compressor at a suitable temperature, and reducing the possibility of failure due to overheating.

[0058] In another embodiment of the present invention, the support frame 10 is further equipped with a transmission assembly for providing driving force to the infusion mechanism and the air-cooling mechanism using the power of the motor 7. The transmission assembly includes: a fixed block 33 fixedly installed between the two support legs of the support frame 10, and a horizontally arranged mounting shaft 34 rotatably mounted on the fixed block 33 via bearings; a transmission rubber roller 35 fixedly sleeved on the mounting shaft 34 and a drive rubber roller 36 fixedly sleeved on the output shaft of the motor 7, wherein the transmission rubber roller 35 and the drive rubber roller 36 are in close contact; a connecting shaft 37 fixedly connected to the first wheel shaft 16 and the second wheel shaft 28 respectively via two couplings; and two pulleys 38 fixedly sleeved on the connecting shaft 37 and the mounting shaft 34, wherein the two pulleys 38 are driven by a belt 39.

[0059] In this embodiment, the transmission assembly on the support frame 10 utilizes the power of the motor 7 to provide driving force for the infusion mechanism and the air-cooling mechanism, achieving efficient power transmission. After the motor 7 starts, the active rubber roller 36 rotates, driving the transmission rubber roller 35 to rotate through close contact with it. This rotation, in turn, drives the pulley 38 on the mounting shaft 34 to rotate, and then drives the pulley 38 on the connecting shaft 37 to rotate via the belt 39, thereby causing the first wheel shaft 16 and the second wheel shaft 28 to rotate. In this way, a single motor 7 can provide power to the oil-free screw air compressor body while simultaneously powering the impeller 15 of the infusion mechanism and the fan wheel 29 of the air-cooling mechanism. This reduces the number of power sources required for the equipment, lowers costs, simplifies the equipment structure, and improves the overall operating efficiency and reliability of the equipment.

[0060] In a further preferred embodiment of the present invention, the housing 2 is provided with heat dissipation fins 206 for dissipating the heat generated by the female screw 3 and the male screw 4 when compressing air to the external environment.

[0061] In this embodiment, the heat dissipation fins 206 on the housing 2 dissipate the heat generated by the female screw 3 and male screw 4 during air compression to the external environment, effectively improving heat dissipation. During the air compression process, the female screw 3 and male screw 4 generate heat. The heat dissipation fins 206 increase the contact area between the housing 2 and the external environment, allowing the heat to dissipate more quickly. This prevents heat from accumulating inside the equipment and causing excessively high temperatures, helping to maintain the normal operating temperature of the equipment. This ensures that the female screw 3 and male screw 4 can continuously and stably compress air, reducing the risk of equipment failure due to overheating and extending the equipment's service life.

[0062] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods.

[0063] This solution also includes an electrical control cabinet, which is installed on the equipment. During use, each piece of electrical equipment can be started and operated separately through the electrical control cabinet. The power connection method of each piece of electrical equipment is an existing mature technology and is well known to those in the field, so it will not be described in detail here.

[0064] In summary, compared with related technologies, the oil-free screw air compressor of the present invention has a jacketed cooling chamber 9 in the casing of the compressor body, and coolant is injected into the jacketed cooling chamber 9 to cool the compressor body. This cooling method is more uniform than the traditional method of directly cooling the screw with cold water. Because the jacketed cooling chamber 9 can surround the key components of the oil-free screw air compressor body, such as the female and male screws, heat can be more comprehensively absorbed and carried away by the coolant, avoiding local overheating and thus improving the working stability of the oil-free screw air compressor.

[0065] Multiple partition plates in the jacketed cooling chamber 9 divide it into multiple sub-chambers. This structural design allows the coolant to form a specific flow path within the chamber, increasing the contact time and area between the coolant and the chamber wall, and further improving the cooling effect.

[0066] Because this invention employs a jacketed cooling chamber 9, it eliminates the need for the complex gas-liquid separation equipment that traditionally uses cold water to directly cool the screw compressor. This not only simplifies the overall structure of the oil-free screw air compressor and reduces the number of parts, but also lowers manufacturing costs. Simultaneously, it reduces the risk of malfunctions caused by the complexity of the gas-liquid separation equipment, thus improving the reliability of the equipment operation.

[0067] The fluid delivery mechanism can transport the coolant in the cooling tank to the various compartments of the jacketed cooling chamber 9, realizing the recycling of the coolant. During the return process, heat dissipation fins are installed on the return horizontal pipe, which can dissipate heat and cool the heated coolant during the return flow, improving the cooling efficiency of the coolant and enabling the coolant to continuously and effectively cool the oil-free screw air compressor body.

[0068] In addition to the cooling effect of the jacketed cooling chamber 9, the casing is also equipped with heat dissipation fins to dissipate the heat generated during air compression by the male and female screws to the external environment. Simultaneously, the fixed heat dissipation components on the top of the cooling box cool the coolant flowing back into the cooling box, and the air-cooling mechanism blows air onto the upper fins to accelerate heat dissipation. These heat dissipation measures work together to improve the overall heat dissipation performance of the oil-free screw air compressor from multiple aspects, helping to extend the service life of the equipment.

[0069] The transmission components mounted on the support frame can use the power of the motor to drive the infusion and air-cooling mechanisms. This design achieves efficient power utilization, eliminating the need for separate power sources for the infusion and air-cooling mechanisms, further simplifying the equipment structure and reducing energy consumption and costs.

[0070] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. An oil-free screw air compressor, characterized in that, include: The base and the oilless screw air compressor body are mounted on the base by screws. The housing of the oilless screw air compressor body is provided with a jacketed cooling chamber for injecting coolant to cool the oilless screw air compressor body. A support frame fixed to the top of the base for mounting the infusion mechanism, the infusion mechanism being fixed to the top of the support frame and used to deliver coolant to the jacketed cooling chamber of the housing; The oil-free screw air compressor body also includes a female screw and a male screw assembled in the inner chamber of the housing. The female screw and the male screw mesh with each other to compress air when rotating. Both ends of the female screw and the male screw are provided with an integrally formed central shaft. Two meshing spur gears are fixedly sleeved on the two central shafts at the same end of the female screw and the male screw. The front end of the housing is open and is fitted with a front cover. The central shafts at both ends of the female screw and the male screw are rotatably connected to the housing and the front cover respectively through sealed bearings. The rear end of the housing and the front end of the front cover are fitted with a rear cover and a front cover respectively. A gear chamber for accommodating two spur gears is formed between the rear cover and the housing. A cooling tank for storing coolant is fixedly installed on the support frame. A top cover is installed on the top opening of the cooling tank. A liquid filling hopper is provided on the top cover. A hopper cover with vent holes is threaded onto the liquid filling hopper. A motor is fixedly installed on the base, and its output shaft is connected to one end of any central shaft through a coupling to provide power for the operation of the oilless screw air compressor body. The jacketed cooling cavity of the housing is equipped with multiple partition plates to increase the strength of the housing and divide the jacketed cooling cavity into multiple sub-chambers. Several connecting holes are opened on the partition plates to connect adjacent sub-chambers. The infusion device includes: A pump casing is fixedly installed on the top of the support frame, and an impeller is assembled inside the pump casing; A first wheel shaft is rotatably mounted inside the pump casing via a sealed bearing, and the impeller is fixedly sleeved on the first wheel shaft, with one end of the first wheel shaft extending outside the pump casing. An inlet pipe is connected to the inlet of the pump housing, with one end of the inlet pipe extending into the cooling tank; A liquid outlet pipe is fixedly installed on the pump housing, and one end of the liquid outlet pipe is connected to a liquid inlet horizontal pipe; The bottom and top of the housing are each equipped with multiple branch pipes that are connected to each of the sub-chambers. The multiple branch pipes at the bottom of the housing are connected to and communicate with the liquid inlet horizontal pipe. The return horizontal pipe is installed at the top of multiple branch pipes on the top of the casing. One end of the return horizontal pipe is connected to the spray pipe. The bottom of the section of the spray pipe extending to the cooling box is provided with a diversion hole.

2. The oil-free screw air compressor as described in claim 1, characterized in that, The return pipe is equipped with heat dissipation fins to dissipate heat and cool the cooled liquid that has been heated in the return pipe during the return process.

3. The oil-free screw air compressor as described in claim 2, characterized in that, The top cover is equipped with two fixed heat dissipation components for cooling the coolant that flows back into the cooling tank after heating. The fixed heat dissipation components include a mounting plate fixed on the top cover. The top and bottom of the mounting plate are respectively provided with lower fins and upper fins. The lower fins extend into the coolant in the cooling tank to conduct and absorb heat from the heated and flowing coolant, and transfer the heat to the upper fins to transfer the heat to the external environment.

4. The oil-free screw air compressor as described in claim 3, characterized in that, The housing is equipped with heat dissipation fins to dissipate the heat generated by the male and female screws when compressing air to the external environment.

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