A maintenance-free vacuum machine
The vacuum pump design, which utilizes a spiral central shaft and water-cooled circulation for cooling, solves the problem of reliance on lubricating oil in traditional vacuum pump sets. This enables maintenance-free operation, low-temperature operation, and extended equipment lifespan at low cost, while also reducing safety risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU SAYAJIE VACUUM TECH CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional vacuum pump sets rely on lubricating oil, which leads to oil carbonization, emulsification, and dust pollution. They require frequent maintenance, and high-temperature operation exacerbates equipment wear, increasing operating costs and safety risks.
It adopts a spiral central shaft, a fully enclosed sealing structure and water-cooled circulation cooling to eliminate the dependence on lubricating oil. The spiral structure forms a negative pressure flow, which, combined with a fully enclosed sealed bearing housing and a water-cooled jacket, achieves oil-free sealing and low-temperature operation.
It achieves the elimination of the need for regular maintenance, reduces operation and maintenance costs, extends equipment life, reduces safety hazards, reduces water waste, and meets the requirements of green manufacturing.
Smart Images
Figure CN224282926U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vacuum pump technology, and more specifically, to a maintenance-free vacuum machine. Background Technology
[0002] The working principle of a traditional vacuum pump set: When the vacuum pump starts, the motor rotates and drives the rotor to rotate through the coupling. At the same time, air enters the cylinder after being filtered through the air intake filter. Blades are placed in the grooves inside the rotor. The blades are thrown out with the direction of rotor rotation and come into contact with the cylinder. They are sealed by lubricating oil, forming a sealed state between the blades. As the rotor rotates, the space between the blades is compressed, creating a positive pressure state. When the blades rotate to the check valve position, the valve opens and the gas is discharged to the oil tank housing. The discharged gas contains oil mist, water vapor, impurities, etc., and enters the oil tank housing. It is filtered by the exhaust filter element inside the oil tank housing. The oil mist is separated and the oil is recycled. The impurities are retained inside the filter element (which needs to be replaced regularly). The exhaust gas is discharged through the exhaust port.
[0003] Because they generally rely on lubricating oil for sealing, problems such as oil carbonization, emulsification, and dust pollution are easily generated during operation, requiring frequent shutdowns for maintenance, increasing operating costs and safety risks.
[0004] Furthermore, the high-temperature operation (above 80°C) of traditional pump sets exacerbates equipment wear and shortens their service life. The market urgently needs a vacuum pump set system that requires no lubrication, operates at low temperatures, and is maintenance-free.
[0005] To address the aforementioned shortcomings, this invention proposes a maintenance-free vacuum unit system. Through negative pressure guidance from the spiral central shaft, water-cooled circulation cooling, and a fully enclosed sealing structure, it completely eliminates dependence on lubricating oil, reduces operating temperature, and isolates external environmental interference, significantly improving equipment reliability and service life. Utility Model Content
[0006] In view of this, the present invention proposes a maintenance-free vacuum machine, comprising: a spiral central shaft 10 and a cylinder 20. The central surface of the spiral central shaft 10 is provided with a spiral structure 11. The cylinder 20 is installed in conjunction with the spiral central shaft 10, and the contact surfaces of the two are fitted together to ensure that no lubricating oil enters the cylinder 20, avoiding problems such as oil carbonization, emulsification, and pollution. There is no need to replace the filter element, add lubricating oil, or stop the machine for maintenance regularly, which greatly reduces the operation and maintenance costs. The cylinder 20 is provided with a first water-cooling jacket 23 on its outer periphery. The first water-cooling jacket 23 is connected to an external cooling device through a cooling pipe to cool the cylinder 20 with circulating water, so that the operating temperature is controlled at 30-40℃, which effectively slows down the aging of components and extends the service life of the equipment. At the same time, it also eliminates the risk of high temperature burns, lubricating oil leakage, and mechanical jamming, reducing the safety hazards for operators. The exhaust gas is discharged directly without oil mist pollution. The water cooling system reduces water waste through closed-loop circulation, which meets the requirements of green manufacturing.
[0007] A maintenance-free vacuum machine, characterized in that it comprises: a spiral central shaft 10 and a cylinder 20, wherein the cylinder 20 is a hollow structure, the spiral central shaft 10 passes through both ends of the cylinder 20, and a spiral structure 11 is provided on the surface of the spiral central shaft 10 inside the cylinder 20. The contact surface between the cylinder 20 and the spiral structure 11 is fitted by a mitered joint to ensure that no lubricating oil enters the interior of the cylinder 20. The spiral central shaft 10 is connected to a motor via a gearbox 50 for speed change, and the cylinder 20 is located away from the gearbox 50. An air inlet 21 is provided at the upper part of the cylinder 20 near the gearbox 50, and an air outlet 22 is provided at the lower part of the cylinder 20 near the gearbox 50. Gas enters the cylinder 20 through the air inlet 21 and is guided to flow to the air outlet 22 by the negative pressure formed behind the spiral structure 11 during high-speed rotation. A first water-cooling jacket 23 is provided on the outer periphery of the cylinder 20. The first water-cooling jacket 23 is connected to an external cooling device through a cooling pipe to cool the cylinder 20 with circulating water, so that the operating temperature is controlled at 30-40℃.
[0008] In some embodiments, both ends of the cylinder body 20 are provided with fully enclosed sealed bearing housings 30. The fully enclosed sealed bearing housings 30 are provided with ceramic bushings 31 and first bearings 33. The ceramic bushings 31 and first bearings 33 are both sleeved and fixed to the inner wall of the fully enclosed sealed bearing housings 30. The two ends of the spiral central shaft 10 pass through the ceramic bushings 31 at their corresponding positions and are sleeved with the corresponding first bearings 33.
[0009] Furthermore, the inner wall of the fully enclosed sealed bearing housing 30 is provided with a lip seal ring 32, and the lip seal ring 32 is sleeved with the ceramic bushing 31. The free end of the lip seal ring 32 contacts the spiral central shaft 10 and bends towards the first bearing 33 outside it, so as to isolate external dust, humidity and corrosive gases.
[0010] Furthermore, a second cooling channel 34 is provided on the outer periphery of the fully enclosed sealed bearing housing 30. The second cooling channel 34 is connected to the first cooling channel, thereby increasing the cooling area of the entire vacuum pump.
[0011] In some embodiments, the first water-cooling jacket 23 and the second cooling channel 34 are both wrapped with a sheet metal housing 40 and have through holes corresponding to the air inlet 21 and the air outlet 22, which improves the protection level of the vacuum pump and further isolates it from external environmental interference.
[0012] Furthermore, the sheet metal housing 40 is coated with a corrosion-resistant coating, achieving a protection level of IP65 or higher.
[0013] In some embodiments, the gearbox 50 is provided with a synchronous gear 51, and the helical central shaft 10 passes through the synchronous gear 51 and is connected to the motor.
[0014] Furthermore, a second bearing 52 is provided between the synchronous gear 51 and the motor. The outer sleeve of the second bearing 52 is sleeved with the inner wall of the gearbox 50 and fixed by mortise and tenon joints to prevent the outer sleeve of the second bearing 52 from loosening during operation. The second bearing 52 ensures the concentricity of the synchronous gear 51 and the motor. The shaft of the motor passing through the gearbox 50 is mechanically sealed.
[0015] Furthermore, the shaft of the motor passing through the gearbox 50 is mechanically sealed.
[0016] The beneficial effects of this utility model are as follows: This utility model proposes a maintenance-free vacuum machine, including a spiral central shaft 10 and a cylinder 20. The central surface of the spiral central shaft 10 is provided with a spiral structure 11. The cylinder 20 is installed in conjunction with the spiral central shaft 10, and the contact surfaces of the two are fitted together to ensure that no lubricating oil enters the cylinder 20, avoiding problems such as oil carbonization, emulsification, and pollution. There is no need to replace the filter element, add lubricating oil, or stop the machine for maintenance regularly, which greatly reduces the operation and maintenance costs. The cylinder 20 is provided with a first water-cooling jacket 23 on its outer periphery. The first water-cooling jacket 23 is connected to an external cooling device through a cooling pipe to cool the cylinder 20 with circulating water, so that the operating temperature is controlled at 30-40℃, which effectively slows down the aging of components and extends the service life of the equipment. At the same time, it also eliminates the risk of high temperature burns, lubricating oil leakage, and mechanical jamming, reducing the safety hazards for operators. The exhaust gas is discharged directly without oil mist pollution. The water cooling system reduces water waste through closed-loop circulation, which meets the requirements of green manufacturing. Attached Figure Description
[0017] Figure 1 This is a cross-sectional view of the maintenance-free vacuum machine of this utility model.
[0018] Explanation of symbols for key components.
[0019] 10. Spiral central shaft, 11. Spiral structure, 20. Inlet port, 21. Outlet port, 22. First water-cooling jacket, 23. Fully enclosed sealed bearing housing, 30. Ceramic bushing, 31. Lip seal ring, 32. First bearing, 33. Second cooling channel, 34. Sheet metal housing, 40. Gearbox, 50. Synchronous gear, 51. Second bearing, 52.
[0020] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation
[0021] Example 1:
[0022] like Figure 1 As shown, a maintenance-free vacuum machine includes: a spiral central shaft 10 and a cylinder 20. The cylinder 20 is a hollow structure. The spiral central shaft 10 passes through both ends of the cylinder 20. A spiral structure 11 is provided on the surface of the spiral central shaft 10 inside the cylinder 20. The contact surface between the cylinder 20 and the spiral structure 11 is fitted together to ensure that no lubricating oil enters the cylinder 20. The spiral central shaft 10 is connected to a motor via a gearbox 50 for speed change. The cylinder 20 is located away from the gearbox 50. An air inlet 21 is provided at the upper part of the cylinder body 20, and an air outlet 22 is provided at the lower part of the cylinder body 20 near the gearbox 50. Gas enters the cylinder body 20 through the air inlet 21 and is guided to flow to the air outlet 22 by the negative pressure formed behind the spiral structure 11 during high-speed rotation. A first water-cooling jacket 23 is provided on the outer periphery of the cylinder body 20. The first water-cooling jacket 23 is connected to an external cooling device through a cooling pipe, which is used to cool the cylinder body 20 with circulating water to control the operating temperature at 30-40℃.
[0023] Both ends of the cylinder body 20 are provided with fully enclosed sealed bearing housings 30. The fully enclosed sealed bearing housings 30 are provided with ceramic bushings 31 and first bearings 33. The ceramic bushings 31 and first bearings 33 are both sleeved and fixed to the inner wall of the fully enclosed sealed bearing housings 30. The two ends of the spiral central shaft 10 pass through the ceramic bushings 31 at their corresponding positions and are sleeved with the corresponding first bearings 33. The inner wall of the fully enclosed sealed bearing housings 30 is provided with lip seals 32, and the lip seals 32 are sleeved with the ceramic bushings 31. The free end of the lip seals 32 contacts the spiral central shaft 10 and bends towards the first bearings 33 outside it to isolate external dust, humidity and corrosive gases. The outer periphery of the fully enclosed sealed bearing housings 30 is provided with second cooling channels 34, which are connected to the first cooling channels to increase the cooling area of the entire vacuum pump.
[0024] The first water-cooling jacket 23 and the second cooling channel 34 are both wrapped with sheet metal housing 40 and have through holes corresponding to the air inlet 21 and the air outlet 22, which improves the protection level of the vacuum pump and further isolates it from external environmental interference. The sheet metal housing 40 is coated with a corrosion-resistant coating, and the protection level reaches IP65 and above.
[0025] The gearbox 50 is equipped with a synchronous gear 51. The spiral central shaft 10 passes through the synchronous gear 51 and is connected to the motor. A second bearing 52 is also provided between the synchronous gear 51 and the motor. The outer sleeve of the second bearing 52 is sleeved with the inner wall of the gearbox 50 and fixed by mortise and tenon joints to prevent the outer sleeve of the second bearing 52 from loosening during operation. The second bearing 52 ensures the concentricity of the synchronous gear 51 and the motor. The shaft of the motor passing through the gearbox 50 is mechanically sealed.
[0026] The beneficial effects of this utility model are as follows: This utility model proposes a maintenance-free vacuum machine, including a spiral central shaft 10 and a cylinder 20. The central surface of the spiral central shaft 10 is provided with a spiral structure 11. The cylinder 20 is installed in conjunction with the spiral central shaft 10, and the contact surfaces of the two are fitted together to ensure that no lubricating oil enters the cylinder 20, avoiding problems such as oil carbonization, emulsification, and pollution. There is no need to replace the filter element, add lubricating oil, or stop the machine for maintenance regularly, which greatly reduces the operation and maintenance costs. The cylinder 20 is provided with a first water-cooling jacket 23 on its outer periphery. The first water-cooling jacket 23 is connected to an external cooling device through a cooling pipe to cool the cylinder 20 with circulating water, so that the operating temperature is controlled at 30-40℃, which effectively slows down the aging of components and extends the service life of the equipment. At the same time, it also eliminates the risk of high temperature burns, lubricating oil leakage, and mechanical jamming, reducing the safety hazards for operators. The exhaust gas is discharged directly without oil mist pollution. The water cooling system reduces water waste through closed-loop circulation, which meets the requirements of green manufacturing.
[0027] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A maintenance-free vacuum machine, characterized in that include: A spiral central shaft (10) and a cylinder (20) are provided. The cylinder (20) is a hollow structure. The spiral central shaft (10) passes through both ends of the cylinder (20). The surface of the spiral central shaft (10) located inside the cylinder (20) is provided with a spiral structure (11). The contact surface between the cylinder (20) and the spiral structure (11) is fitted together. The spiral central shaft (10) is connected to a motor via a gearbox (50). The upper part of the cylinder (20) away from the gearbox (50) has an opening. An air inlet (21) is provided, and an air outlet (22) is provided at the lower part of the cylinder body (20) near the gearbox (50). Gas enters the cylinder body (20) through the air inlet (21) and is guided to flow to the air outlet (22) by the negative pressure formed behind the spiral structure (11) when rotating at high speed. A first water-cooling jacket (23) is provided on the outer periphery of the cylinder body (20). The first water-cooling jacket (23) is connected to an external cooling device through a cooling pipe and is used to cool the cylinder body (20) by circulating water.
2. The maintenance-free vacuum machine of claim 1, wherein: Both ends of the cylinder body (20) are provided with fully enclosed sealed bearing housings (30). The fully enclosed sealed bearing housings (30) are provided with ceramic bushings (31) and first bearings (33). The ceramic bushings (31) and the first bearings (33) are both sleeved and fixed to the inner wall of the fully enclosed sealed bearing housings (30). The two ends of the spiral central shaft (10) pass through the ceramic bushings (31) at their corresponding positions and are sleeved with the corresponding first bearings (33).
3. The maintenance-free vacuum machine of claim 2, wherein: The inner wall of the fully enclosed sealed bearing housing (30) is provided with a lip seal (32) and the lip seal (32) is sleeved with the ceramic bushing (31). The free end of the lip seal (32) contacts the spiral central shaft (10) and bends towards the first bearing (33) outside it to isolate external dust, humidity and corrosive gases.
4. The maintenance-free vacuum machine of claim 2, wherein: The outer periphery of the fully enclosed sealed bearing housing (30) is provided with a second cooling channel (34), which is connected to the first cooling channel to increase the cooling area of the entire vacuum pump.
5. The maintenance-free vacuum machine as described in claim 4, characterized in that: The first water-cooling jacket (23) and the second cooling channel (34) are both wrapped with sheet metal housing (40) and have through holes corresponding to the air inlet (21) and air outlet (22), which improves the protection level of the vacuum pump and further isolates it from external environmental interference.
6. The maintenance-free vacuum machine as described in claim 5, characterized in that: The sheet metal housing (40) is coated with a corrosion-resistant coating, and its protection level reaches IP65 or above.
7. The maintenance-free vacuum machine as described in claim 1, characterized in that: The gearbox (50) is equipped with a synchronous gear (51), and the helical central shaft (10) passes through the synchronous gear (51) and is connected to the motor.
8. The maintenance-free vacuum machine as described in claim 7, characterized in that: A second bearing (52) is provided between the synchronous gear (51) and the motor. The outer bushing of the second bearing (52) is sleeved and fixed to the inner wall of the gearbox (50). The concentricity of the synchronous gear (51) and the motor is ensured by the second bearing (52). The shaft of the motor passes through the gearbox (50) and is mechanically sealed.
9. The maintenance-free vacuum machine as described in claim 7, characterized in that: The shaft of the motor passes through the gearbox (50) where a mechanical seal is provided.