New centrifugal ventilator

Abstract

The present invention provides a novel centrifugal ventilator, which can be used to separate oil mist mixed media, including a shell and a rotor system, wherein a flow channel extending in a vertical direction is provided in the shell, and the shell is provided with an inlet end located on the bottom side of the shell and an outlet end located on the top side of the shell and connected to the flow channel, and the rotor system includes a transmission shaft arranged in the vertical direction, an impeller sleeved on the transmission shaft and a driving motor for driving the transmission shaft, and a plurality of longitudinal guide grooves are provided on the side wall of the flow channel, and a first metal filter composite layer is covered on the outside of the plurality of longitudinal guide grooves, and the oil mist mixed medium enters the flow channel through the inlet end and is thrown toward the side wall of the flow channel by the impeller to separate the oil and gas, and the separated gas is discharged through the outlet end, and the separated oil passes through the first metal filter composite layer into the longitudinal guide groove and is recovered.

Description

Technical Field

[0001] The invention relates to an oil-gas separation device, in particular to a novel centrifugal ventilator. Background Art

[0002] Engineering machinery, machine tools, reducers, engines and other complete systems are inseparable from hydraulic / lubricating oil systems. During operation, hydraulic / lubricating oil systems will generate a large amount of suspended oil mist particles due to splashing, collision, high temperature and gas. Since the hydraulic / lubricating oil system needs to be connected to the atmosphere during operation, the place where it is connected to the atmosphere is generally on the oil tank and its shell with a cavity. The oil mist generated or transported in these cavities will gather in large quantities and enter the atmosphere during ventilation. On the one hand, these oil mist particles are harmful to the environment and human body. On the other hand, as the oil mist is generated and discharged into the atmosphere, the amount of oil is continuously consumed and wasted, resulting in an increase in the use and maintenance costs of the machinery.

[0003] At present, hydraulic / lubricating oil systems are generally equipped with dynamic pressure, filtering or centrifugal oil-gas separation ventilators.

[0004] The principle of the dynamic pressure oil-gas separation ventilator is that the oil mist mixed with air with pressure / speed is forced to make circular motion or turn through its rotating flow channel. When the medium rotates or changes the flow direction, centrifugal force will be generated. The centrifugal force will cause the medium particles to move laterally to the outside of the turn at an increased speed, so that the medium flows close to the outermost wall. Due to the viscosity of the medium, the closer to the outer wall, the lower the speed of the medium, and the speed at the wall is zero. In this process, the larger the particles in the medium, the greater the particle density, the greater the centrifugal force, the greater their ability to adhere to the wall during the flow, and the less likely they are to be carried forward by the entire flow field. Compared with the gas, these particles themselves have a larger mass and density, and will be separated from the gas and precipitated during this movement. They are captured by the wall and separated and remain in the cavity, while the gas is discharged smoothly. This separation ventilator requires the medium to have a higher pressure or flow rate, and has a poor separation effect on small particle oil mist, and the overall separation efficiency is low.

[0005] The principle of the filter-type oil-gas separation ventilator is that porous filter materials are arranged on the ventilation flow channel. When the gas with oil mist particles passes through the filter material, the oil mist particles collide with the filter material and are intercepted and captured by the filter material, while the gas can pass smoothly due to its small molecular particles. The intercepted oil mist particles gather and increase and return to the cavity due to gravity. The disadvantage of this separation ventilator is that it has high efficiency only when it is large in size, and it is easy to clog. It has poor adaptability to media with high viscosity. The separation efficiency and box ventilation effect drop sharply after long-term use. It has good effect on large oil mist particles, and small oil mist particles can also be separated, but at the same time it requires very fine filter materials, which are easy to clog and have poor engineering practicality.

[0006] The principle of the centrifugal oil mist separation ventilator is to sweep the medium channel through the rotating blade structure. A part of the particles in the medium collide with the surface of the blade and change the direction of the particles to move circumferentially, so that they are collected by the outer wall of the flow channel or the circumferential movement to a collection cavity. After being hit by the blade, some particles will be adsorbed on the surface of the blade due to viscosity. Due to the large centrifugal force generated by the rotation, they move and gather on the surface of the blade and are thrown to the circumference to be collected. Another part of the particles and gas are driven by the impeller to do spiral motion together. The principle of separation here is the same as that of the dynamic pressure oil and gas separation ventilator. The separation efficiency and effect of the centrifugal oil and gas separation ventilator are much better than other types of separation ventilators, and the advantages are outstanding. However, the disadvantages are also obvious. It requires external power input, there are moving parts, and the reliability, life and use cost are high. It is also efficient. The separation ventilator with good effect is either large in size or high in speed. For example, the centrifugal ventilator used in aircraft engines is small in size and high in speed, mostly around 10000-25000rpm, and the required driving power is large. Summary of the invention

[0007] In view of this, the present invention proposes a novel centrifugal ventilator with high efficiency, low power consumption and small structural size.

[0008] The present invention provides a novel centrifugal ventilator, which can be used to separate oil mist mixed media, including a shell and a rotor system, wherein a flow channel extending in a vertical direction is provided in the shell, and the shell is provided with an inlet end located on the bottom side of the shell and an outlet end located on the top side of the shell and connected to the flow channel, and the rotor system includes a transmission shaft arranged in the vertical direction, an impeller sleeved on the transmission shaft and a driving motor for driving the transmission shaft, and a plurality of longitudinal guide grooves are provided on the side wall of the flow channel, and a first metal filter composite layer is covered on the outside of the plurality of longitudinal guide grooves, and the oil mist mixed medium enters the flow channel through the inlet end and is thrown toward the side wall of the flow channel by the impeller to separate the oil and gas, and the separated gas is discharged through the outlet end, and the separated oil passes through the first metal filter composite layer into the longitudinal guide groove and is recovered.

[0009] In one embodiment, the impeller includes an annular portion arranged on the outside of the transmission shaft, an inner extension portion extending from the top of the annular portion toward the radial inside, an outer extension portion extending from the bottom of the annular portion toward the radial outside, and a plurality of blades arranged at the bottom of the outer extension portion, wherein the plurality of blades are coaxially spaced along the circumferential direction, the inner extension portion is fixedly connected to the transmission shaft so as to rotate with the transmission shaft, a spacing space is provided between the impeller and the transmission shaft, a plurality of guide holes are provided on the annular portion, and the guide holes are connected with the spacing space and the flow channel.

[0010] In one embodiment, a plurality of transverse guide grooves are provided on the blades, and a second metal filter composite layer is covered on the outside of the plurality of transverse guide grooves. The oil mist mixed medium enters the transverse guide grooves through the second metal filter composite layer and is thrown toward the side wall of the flow channel.

[0011] In one embodiment, a plurality of the longitudinal guide grooves extend in the vertical direction and are arranged at intervals in the circumferential direction; a plurality of the transverse guide grooves extend in the horizontal direction and are arranged at intervals in the vertical direction.

[0012] In one embodiment, a metal filter is sleeved on the transmission shaft, the metal filter is located on the top side of the impeller, and the metal filter is fixed relative to the transmission shaft so as to rotate with the transmission shaft.

[0013] In one embodiment, an adjusting gasket and a washer are further provided on the transmission shaft, the adjusting gasket is located on the top side of the metal filter, the washer is located on the bottom side of the impeller, and bolts are provided at the bottom of the transmission shaft.

[0014] In one embodiment, the shell includes an upper flange seat and a lower flange seat arranged in a vertical direction, the upper flange seat and the lower flange seat are connected and fixed by a quick-release flange, the inlet end is arranged at the bottom end of the lower flange seat, the outlet end is arranged at the top side of the upper flange seat, and the outlet end is provided with an exhaust flange, and the separated gas is discharged from the exhaust flange through the outlet end.

[0015] In one embodiment, the impeller is located near the connection area between the upper flange seat and the lower flange seat, and the longitudinal guide groove and the first metal filter composite layer are correspondingly arranged in the connection area between the upper flange seat and the lower flange seat.

[0016] In one embodiment, an O-ring is provided at the connection between the upper flange seat and the lower flange seat.

[0017] In one embodiment, the driving motor is disposed at the top of the shell, one end of the transmission shaft is drivingly connected to the driving motor, and the other end passes through the top of the shell and extends into the shell.

[0018] In summary, the present invention effectively solves the shortcomings of existing oil-gas separation ventilators, and combines their advantages to develop a new type of centrifugal ventilator. By arranging longitudinal guide grooves and a first metal filter composite layer covering the longitudinal guide grooves on the side walls of the flow channel, arranging a metal filter above the impeller, arranging transverse guide grooves and a second metal filter composite layer covering the transverse guide grooves on the blades, and arranging guide holes on the annular portion of the impeller, the flow of the entire centrifugal separation ventilator is very smooth, and the oil mist is efficiently separated through multi-stage filtration and centrifugal action, and the separated oil is recovered to the oil tank or cavity of the hydraulic / lubricating oil system. The technical solution of the present invention takes advantage of its strengths and avoids its weaknesses, combines the advantages of dynamic pressure type, filtration type, and centrifugal oil-gas separation ventilators, avoids their shortcomings, and has high efficiency, low flow resistance, long life, low power consumption, good effect, and good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional cross-sectional view of the novel centrifugal ventilator of the present invention.

[0020] Figure 2 It is a three-dimensional cross-sectional view of the upper flange seat.

[0021] Figure 3 It is a three-dimensional cross-sectional view of the upper flange seat without the first metal filter composite layer installed.

[0022] Figure 4 It is a three-dimensional cross-sectional view of the lower flange seat.

[0023] Figure 5 It is a three-dimensional cross-sectional view of the rotor system without the drive motor installed. DETAILED DESCRIPTION

[0024] Before describing the embodiments in detail, it should be understood that the present invention is not limited to the detailed structure or component arrangement described below or in the accompanying drawings in this application. The present invention may be an embodiment implemented in other ways. Moreover, it should be understood that the words and terms used herein are only used for descriptive purposes and should not be interpreted restrictively. The words "include", "comprise", "have" and the like used herein are intended to include the items listed thereafter, their equivalents and other additional items. In particular, when describing "a certain element", the present invention does not limit the number of the element to one, but may also include multiple elements.

[0025] like Figure 1-5 As shown, the present invention provides a novel centrifugal ventilator 10, which can be used to efficiently separate a large amount of oil mist mixed medium generated by splashing, collision, high temperature and gas in the operation of the hydraulic / lubricating oil system in the whole system of engineering machinery, machine tools, reducers and engines, and recover the separated oil to the oil tank or cavity of the hydraulic / lubricating oil system.

[0026] The novel centrifugal ventilator 10 is arranged in the vertical direction, and includes a shell 12 and a rotor system. A flow channel 14 extending in the vertical direction is provided in the shell 12, that is, the inner wall of the shell 12 encloses the flow channel 14. The shell 12 is provided with an inlet end 16 located at the bottom side of the shell 12 and an outlet end 18 located at the top side of the shell 12, which are connected to the flow channel 14. More specifically, the shell 12 includes an upper flange seat 20 and a lower flange seat 22 arranged in the vertical direction, and the upper flange seat 20 and the lower flange seat 22 are connected and fixed by a quick-release flange 24. The inlet end 16 is arranged at the bottom end of the lower flange seat 22, and the outlet end 18 is arranged at the top side of the upper flange seat 20, and the outlet end is also provided with an exhaust flange 26, and the separated gas is discharged from the exhaust flange 26 through the outlet end 18. An O-ring 32 can be provided at the connection between the exhaust flange 26 and the outlet end 18 to ensure the sealing of the connection.

[0027] The bottom end of the upper flange seat 20 is provided with a first connection end 28, and the top end of the lower flange seat 22 is provided with a second connection end 30. The first connection end 28 is butted with the second connection end 30 and then fixed by the quick-release flange 24. Preferably, an O-ring 32 is provided between the first connection end 28 and the second connection end 30 to enhance the sealing performance of the housing 12.

[0028] The lower flange seat 22 can be connected to the oil tank or cavity of the hydraulic / lubricating oil system. For example, the bottom side of the outer wall of the lower flange seat 22 is connected to the oil tank or cavity structure of the hydraulic / lubricating oil system through a flange, and an O-ring 32 can also be provided at the connection to ensure the sealing of the connection.

[0029] The rotor system is arranged on the housing 12. Specifically, the rotor system includes a transmission shaft 34 arranged in the vertical direction, a metal filter 36 and an impeller 38 sleeved on the transmission shaft 34, and a drive motor 40 for driving the transmission shaft 34. In the illustrated embodiment, the drive motor 40 is mounted on the top of the upper flange seat 20, one end of the transmission shaft 34 is drivingly connected to the drive motor 40, and the other end passes through the top of the upper flange seat 20 and extends into the flow channel 14.

[0030] In the illustrated embodiment, the impeller 38 is located near the connection area between the upper flange seat 20 and the lower flange seat 22. The side wall of the flow channel 14, that is, the inner wall of the housing 12, is provided with a plurality of longitudinal guide grooves 42 corresponding to the impeller 38. Preferably, the plurality of longitudinal guide grooves 42 extend in the vertical direction and are evenly spaced and arranged in the circumferential direction. The plurality of longitudinal guide grooves 42 are covered with a first metal filter composite layer 44. The oil mist mixed medium enters the flow channel 14 through the inlet end 16 and is thrown toward the side wall of the flow channel 14 by the impeller 38 to separate the oil and gas. The separated gas, such as air, is discharged through the outlet end 18. The separated oil passes through the first metal filter composite layer and enters the longitudinal guide groove 42 to be recovered, for example, to the oil tank or cavity of the hydraulic / lubricating oil system. In the illustrated embodiment, a plurality of longitudinal guide grooves 42 and a first metal filter composite layer 44 are correspondingly arranged in the connection area between the upper flange seat 20 and the lower flange seat 22 . For example, the upper half of the plurality of longitudinal guide grooves 42 are located on the inner wall of the upper flange seat 20 , and the lower half are located on the inner wall of the lower flange seat 22 .

[0031] like Figure 2 As shown, only the upper area of ​​the longitudinal guide groove 42 located on the inner wall of the lower flange seat 22 is covered with the first metal filter composite layer 44. With this arrangement, when the oil accumulates and flows downward through the longitudinal guide groove 42, since the lower area of ​​the longitudinal guide groove 42 is not covered with the first metal filter composite layer 44, the oil can flow downward quickly, thereby improving the recovery efficiency.

[0032] The impeller 38 includes an annular portion 46 arranged around the outside of the transmission shaft 34, an inner extension portion 48 extending from the top of the annular portion 46 toward the radial inside, an outer extension portion 50 extending from the bottom of the annular portion 46 toward the radial outside, and a plurality of blades 52 arranged at the bottom of the outer extension portion 50, wherein the plurality of blades 52 extend in the vertical direction and are coaxially and evenly spaced along the circumferential direction. The inner extension portion 48 is fixedly connected to the transmission shaft 34 to rotate with the transmission shaft 34, and a spacing space 54 is provided between the impeller 38 and the transmission shaft 34. The annular portion 46 is provided with a plurality of guide holes 56 evenly spaced along the circumferential direction, and the guide holes 56 are connected to the spacing space 54 and the flow channel 14.

[0033] In the illustrated embodiment, a plurality of transverse guide grooves 58 are respectively provided on both side surfaces of each blade 52, and the plurality of transverse guide grooves 58 are covered with a second metal filter composite layer 60, and the oil mist mixed medium enters the transverse guide grooves 58 through the second metal filter composite layer 60 and is thrown toward the side wall of the flow channel 14. Preferably, the plurality of transverse guide grooves 58 are provided on the entire side surface of the blade 52, and the plurality of transverse guide grooves 58 extend in the horizontal direction and are evenly spaced and arranged in the vertical direction.

[0034] The metal filter 36 is arranged on the top side of the impeller 38, and the metal filter 36 is fixedly connected to the rotating shaft 34 so as to rotate with the rotation of the transmission shaft 34. The transmission shaft 34 is also sleeved with an adjusting washer 62 and a washer 64. The adjusting washer 62 is located on the top side of the metal filter 36, and the washer 64 is located on the bottom side of the impeller 38. A bolt 66 is also arranged at the bottom of the transmission shaft 34, and the washer 64 is located above the bolt 66, and the bottom of the washer 64 abuts against the bolt 66, and the bottom inner edge of the blade 52 abuts against the top outer edge of the washer 64. Moreover, the washer 64 also has a diversion function, so that after the oil mist mixed medium enters the flow channel 14, the washer 64 can divert the oil mist mixed medium to the transverse guide groove 58 of the blade 52, so as to prevent the oil mist mixed medium from directly entering the interval space 54 from the bottom of the impeller 38. In other words, the adjusting washer 62 is used for top limiting, and the bolt 66 is used for bottom limiting, so that the metal filter 36 and the impeller 38 are pressed between the adjusting washer 62 and the gasket 64 , so that they are fixed together on the transmission shaft 34 .

[0035] The following detailed description is given by taking the oil mist mixed medium as oil mist mixed air as an example.

[0036] During operation, the oil mist mixed air in the cavity or oil tank of the hydraulic / lubricating oil system enters the flow channel 14 through the inlet end 16 of the lower flange seat 22 and acts on the rotor system in the flow channel 14, and the rotor system can rotate at a speed of 5000-6000rpm. First, the blades 52 and the second metal filter composite layer 60 on the impeller 38 will stir the oil mist mixed air to rotate and perform centrifugal motion. Most of the oil mist particles move to the side wall of the flow channel 14 under the action of centrifugal force. The first metal filter composite layer 44 on the side wall of the flow channel 14 will capture the oil mist particles well, reduce or even eliminate the collision and splashing of the oil mist particles, and retain the oil mist in the filter. As the oil accumulates and the centrifugal force continues to act, the oil will pass through the first metal filter composite layer 44 into the longitudinal guide groove 42 and flow downward, returning to the cavity or the oil tank. At the same time, the blades 52 of the impeller 38 and the second metal filter composite layer 60 will also capture and collect particles in the oil mist mixed air, which will be gathered in the transverse guide grooves 58 on the blades 52 and then thrown to the side wall of the flow channel 14 for collection and recovery. The oil mist mixed air enters the spacing space 54 from the bottom side of the impeller 38, and then passes through the guide holes 56 on the annular portion 46 to be turned and accelerated, and then turned upward. These two processes are actually two centrifugal movements. The oil mist particles that escaped in the previous step are separated once, and then the oil mist mixed air now carries extremely small oil mist particles, which are then filtered and captured by the metal filter 36, and the discharged air is very clean. Because the metal filter 36 rotates with the shaft, under the action of centrifugal force, the oil mist particles captured on the metal filter 36 will be continuously thrown to the side wall of the flow channel 14 to be collected and recovered. The metal filter 36 is also self-cleaning, which greatly reduces the flow resistance of the metal filter 36. The impeller 38 and the guide hole 56 also play a role in promoting the oil mist mixed with air, thereby making the flow of the entire new centrifugal ventilator 10 very smooth.

[0037] In summary, the present invention effectively solves the shortcomings of existing oil-gas separation ventilators, and combines their advantages to develop a new type of centrifugal ventilator. By arranging longitudinal guide grooves and a first metal filter composite layer covering the longitudinal guide grooves on the side walls of the flow channel, arranging a metal filter above the impeller, arranging transverse guide grooves and a second metal filter composite layer covering the transverse guide grooves on the blades, and arranging guide holes on the annular portion of the impeller, the flow of the entire centrifugal separation ventilator is very smooth, and the oil mist is efficiently separated through multi-stage filtration and centrifugal action, and the separated oil is recovered to the oil tank or cavity of the hydraulic / lubricating oil system. The technical solution of the present invention takes advantage of its strengths and avoids its weaknesses, combines the advantages of dynamic pressure type, filtration type, and centrifugal oil-gas separation ventilators, avoids their shortcomings, and has high efficiency, low flow resistance, long life, low power consumption, good effect, and good adaptability.

[0038] The concepts described herein may be implemented in other forms without departing from their spirit and characteristics. The specific embodiments disclosed should be considered illustrative rather than restrictive. Therefore, the scope of the present invention is determined by the appended claims rather than by the preceding description. Any changes within the literal meaning and equivalent scope of the claims should fall within the scope of these claims.

Claims

1. A new type of centrifugal ventilator can be used to separate oil mist mixed medium, characterized in that: The invention comprises a shell and a rotor system, wherein a flow channel extending in a vertical direction is provided in the shell, and the shell is provided with an inlet end located at the bottom side of the shell and an outlet end located at the top side of the shell and connected with the flow channel. The rotor system comprises a transmission shaft arranged in a vertical direction, an impeller sleeved on the transmission shaft and a driving motor for driving the transmission shaft. A plurality of longitudinal guide grooves are provided on the side wall of the flow channel, and a first metal filter composite layer is covered on the outside of the plurality of longitudinal guide grooves. The oil mist mixed medium enters the flow channel through the inlet end and is thrown toward the side wall of the flow channel by the impeller to separate the oil and gas. The separated gas is discharged through the outlet end, and the separated oil passes through the first metal filter composite layer and enters the longitudinal guide groove to be recovered. The impeller comprises an annular portion arranged around the outside of the transmission shaft, an inner extension portion extending from the top end of the annular portion toward the radial inside, and an inner extension portion extending from the bottom end of the annular portion toward the radial outside. An extended outer portion and a plurality of blades arranged at the bottom of the outer portion, the plurality of blades are coaxially spaced and distributed circumferentially, the inner portion is fixedly connected to the transmission shaft so as to rotate with the transmission shaft, a spacing space is provided between the impeller and the transmission shaft, a plurality of guide holes are provided on the annular portion, the guide holes are connected with the spacing space and the flow channel; a plurality of transverse guide grooves are provided on the blades, a plurality of the transverse guide grooves are covered with a second metal filter composite layer, the oil mist mixed medium enters the transverse guide groove through the second metal filter composite layer and is thrown to the side wall of the flow channel; a plurality of the longitudinal guide grooves extend in the vertical direction and are spaced and arranged circumferentially; a plurality of the transverse guide grooves extend in the horizontal direction and are spaced and arranged vertically; a metal filter is sleeved on the transmission shaft, the metal filter is located on the top side of the impeller, and the metal filter is fixed relative to the transmission shaft so as to rotate with the transmission shaft.

2. The novel centrifugal ventilator according to claim 1, characterized in that: The transmission shaft is also provided with an adjusting gasket and a washer, wherein the adjusting gasket is located on the top side of the metal filter screen, the washer is located on the bottom side of the impeller, and bolts are provided at the bottom of the transmission shaft.

3. The novel centrifugal ventilator as claimed in claim 1, characterized in that: The shell includes an upper flange seat and a lower flange seat arranged in a vertical direction, the upper flange seat and the lower flange seat are connected and fixed by a quick-release flange, the inlet end is arranged at the bottom end of the lower flange seat, the outlet end is arranged at the top side of the upper flange seat, and the outlet end is provided with an exhaust flange, and the separated gas is discharged from the exhaust flange through the outlet end.

4. The novel centrifugal ventilator as claimed in claim 3 is characterized in that: The impeller is located near the connection area between the upper flange seat and the lower flange seat, and the longitudinal guide groove and the first metal filter composite layer are correspondingly arranged in the connection area between the upper flange seat and the lower flange seat.

5. The novel centrifugal ventilator as claimed in claim 3, characterized in that: An O-ring is provided at the connection between the upper flange seat and the lower flange seat.

6. The novel centrifugal ventilator as claimed in claim 1, characterized in that: The driving motor is arranged on the top of the shell, one end of the transmission shaft is drivingly connected to the driving motor, and the other end of the transmission shaft passes through the top of the shell and extends into the shell.

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