CN112403161A

CN112403161A - Novel centrifugal ventilator

Info

Publication number: CN112403161A
Application number: CN202011250840.5A
Authority: CN
Inventors: 胡秀文
Original assignee: Guizhou Zhihui Energy Technology Co ltd
Current assignee: Guizhou Zhihui Energy Technology Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-02-26

Abstract

The invention provides a novel centrifugal ventilator which can be used for separating oil mist mixed media and comprises a shell and a rotor system, a flow passage extending along the vertical direction is arranged in the shell, the shell is provided with an inlet end which is communicated with the flow passage and is positioned at the bottom side of the shell and an outlet end which is positioned at the top side of the shell, the rotor system comprises a transmission shaft arranged along the vertical direction, an impeller sleeved on the transmission shaft and a driving motor used for driving the transmission shaft, a plurality of longitudinal diversion trenches are arranged on the side wall of the flow channel, a first metal filter screen composite layer covers the longitudinal diversion trenches, the oil mist mixed medium enters the flow channel through the inlet end and is thrown to the side wall of the flow channel by the impeller so as to separate oil from gas, the separated gas is discharged through the outlet end, and the separated oil enters the longitudinal diversion trench through the first metal filter screen composite layer to be recovered.

Description

Novel centrifugal ventilator

Technical Field

The invention relates to an oil-gas separation device, in particular to a novel centrifugal ventilator.

Background

The hydraulic/lubricating oil system can not be separated from the whole systems of engineering machinery, machine tools, speed reducers, engines and the like, and can generate a large amount of suspended oil mist particles due to splashing, collision, high temperature and gas entrainment in the operation process. Because the hydraulic/lubricating oil system needs to be communicated with the atmosphere in operation, the place communicated with the atmosphere is generally arranged on an oil tank and a shell with cavities thereof, oil mist generated or conveyed from the places of the cavities is gathered in a large quantity, and the oil mist enters the atmospheric environment in the ventilation process, on one hand, the oil mist particles are harmful to the environment and human bodies, and on the other hand, the oil mass is continuously consumed and wasted along with the oil mist generation and is discharged to the atmosphere, so that the use and maintenance cost of the machine is increased.

Currently hydraulic/lube systems are typically equipped with dynamic pressure, filtration or centrifugal oil-gas separation ventilators.

The dynamic pressure type oil-gas separation ventilator has the principle that oil mist mixed air with pressure/speed is forced to do circular motion or turn through a rotating flow channel, centrifugal force is generated when a medium rotates or the flowing direction is changed, the centrifugal force can cause the transverse moving speed of medium particles to the outer side of a turn to be increased, so that the medium flows close to the outermost wall, and the speed of the medium at the position close to the wall is lower as the viscosity of the medium is closer to the outer wall, and the speed at the position close to the wall is zero. The larger the particles in the medium in the process, the higher the particle density, the higher the centrifugal force, the higher the ability of adhering to the wall in the flowing process, the less the particles are carried by the whole flow field to continue flowing forwards, compared with gas, the particles have larger mass and density, and are separated from the gas and settled in the moving process, captured by the wall surface and then separated out and retained in the cavity, and the gas is smoothly discharged. The separation ventilator requires a medium with higher pressure or flow velocity, has poor separation effect on small-particle oil mist and has lower integral separation efficiency.

The principle of the filtering type oil-gas separation ventilator is that a porous filtering material is arranged on a ventilation flow channel, when gas with oil mist particles passes through the filtering material, the oil mist particles collide with the filtering material and are intercepted and captured by the filtering material, and the gas can smoothly pass through the filtering material due to small molecular particles. The gathered and increased oil mist particles return to the cavity due to gravity, and the separation ventilator has the defects of large volume, high efficiency, easy blockage, poor adaptability to media with high viscosity, and rapid reduction of separation efficiency and box body ventilation effect after long-time use. The oil mist particle separating device has the advantages that the effect on large-particle oil mist particles is good, small-particle oil mist particles can be separated, fine filter materials are needed at the same time, the filter materials are easy to block, and the engineering practicability is poor.

The principle of the centrifugal oil mist separation ventilator is that a rotating blade type structure is used for transversely sweeping a medium channel, a part of particles in a medium collide with the surface of a blade to change the movement direction of the particles to move in the circumferential direction so as to be collected by the outer wall of a flow channel or move to a collection cavity in the circumferential direction, a part of particles are adsorbed on the surface of the blade due to the viscous action after being hit by the blade, and the particles move on the surface of the blade due to the rotation to generate a large centrifugal force and are collected by being thrown to the circumferential direction. The other part of particles and gas are driven by the impeller to do spiral motion together, and the separation principle is the same as that of the dynamic pressure type oil-gas separation ventilator. The centrifugal oil-gas separation ventilator has the advantages that the separation efficiency and the separation effect are much better than those of other types of separation ventilators. But the shortcoming is also obvious, it needs external power input, has moving parts, and the reliability, life and use cost are higher, and efficient, effectual separation ventilator is either bulky or the rotational speed is high, for example the centrifugal ventilator that uses on the aeroengine is small in size the rotational speed is big, and is mostly about 10000-.

Disclosure of Invention

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

In an embodiment, the impeller includes the ring portion of ring locating the transmission shaft outside, certainly the ring portion top is towards the radial inboard extension portion that extends, certainly the ring portion bottom is towards the radial outside extension portion that extends and set up in a plurality of blades of extension portion bottom, and is a plurality of the coaxial interval distribution in circumference is followed to the blade, the extension portion with transmission shaft fixed connection is in order to follow the transmission shaft rotates, the impeller with interval space has between the transmission shaft, be equipped with a plurality of water conservancy diversion holes on the ring portion, the water conservancy diversion hole with interval space with the runner intercommunication.

In an embodiment, a plurality of transverse guiding grooves are formed in the blade, a second metal screen composite layer covers the plurality of transverse guiding grooves, and the oil mist mixed medium enters the transverse guiding grooves through the second metal screen composite layer and is thrown to the side wall of the flow channel.

In one embodiment, the plurality of longitudinal diversion trenches extend in the vertical direction and are arranged at intervals in the circumferential direction; the plurality of transverse diversion trenches extend along the horizontal direction and are arranged at intervals along the vertical direction.

In one embodiment, the transmission shaft is sleeved with a metal filter screen, the metal filter screen is positioned on the top side of the impeller, and the metal filter screen is fixed relative to the transmission shaft so as to rotate along with the transmission shaft.

In an embodiment, the transmission shaft is further provided with an adjusting backing ring and a gasket, the adjusting backing ring is located on the top side of the metal filter screen, the gasket is located on the bottom side of the impeller, and the bottom of the transmission shaft is provided with a bolt.

In one embodiment, the casing includes an upper flange seat and a lower flange seat which are arranged along a vertical direction, the upper flange seat and the lower flange seat are fixedly connected through 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 edge of the upper flange seat, the outlet end is provided with an exhaust flange, and separated gas is discharged from the exhaust flange through the outlet end.

In an embodiment, the impeller is located near a connection region of the upper flange seat and the lower flange seat, and the longitudinal guiding groove and the first metal screen composite layer are correspondingly disposed in the connection region of the upper flange seat and the lower flange seat.

In one embodiment, an O-ring is disposed at a connection position of the upper flange seat and the lower flange seat.

In one embodiment, the driving motor is disposed at the top of the housing, one end of the transmission shaft is in driving connection with the driving motor, and the other end of the transmission shaft penetrates through the top of the housing and extends into the housing.

In conclusion, the invention effectively solves the defects of the existing oil-gas separation ventilator, combines the advantages of the existing oil-gas separation ventilator and develops a novel centrifugal ventilator. The vertical diversion trench and the first metal filter screen composite layer covering the vertical diversion trench are arranged on the side wall of the flow channel, the metal filter screen is arranged above the impeller, the transverse diversion trench and the second metal filter screen composite layer covering the transverse diversion trench are arranged on the blade, and the diversion hole is formed in the annular part of the impeller, so that the whole centrifugal separation ventilator can smoothly flow, the oil mist can be efficiently separated through multi-stage filtration and centrifugal action, and the separated oil liquid is recovered to an oil tank or a cavity of a hydraulic/lubricating oil system. The technical scheme of the invention makes good use of advantages and avoids disadvantages, combines the advantages of dynamic pressure type, filtering type and centrifugal type oil-gas separation ventilators, avoids the disadvantages of the ventilators, and has the advantages of high efficiency, low flow resistance, long service life, low power consumption, good effect and good adaptability.

Drawings

FIG. 1 is a perspective cross-sectional view of a novel centrifugal ventilator of the present invention.

Fig. 2 is a perspective cross-sectional view of the upper flange seat.

FIG. 3 is a perspective cross-sectional view of the upper flange mount without the first metal screen composite layer installed.

Fig. 4 is a perspective cross-sectional view of the lower flange seat.

Fig. 5 is a perspective sectional view of the rotor system without the drive motor installed.

Detailed Description

Before the embodiments are described in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of embodiments in other forms of implementation. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," "having," and the like, herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. In particular, when "a certain element" is described, the present invention is not limited to the number of the element being one, and may include a plurality of the elements.

As shown in fig. 1 to 5, the present invention provides a novel centrifugal ventilator 10, which can be used for efficiently separating a large amount of oil mist mixed media generated by splashing, collision, high temperature and gas entrainment during the operation of a hydraulic/lubricating oil system in the whole system such as engineering machinery, machine tools, speed reducers and engines, and recovering the separated oil to an oil tank or a cavity of the hydraulic/lubricating oil system.

The novel centrifugal ventilator 10 is arranged in a vertical direction, and comprises a housing 12 and a rotor system, wherein a flow channel 14 extending in the vertical direction is arranged in the housing 12, that is, the flow channel 14 is formed by enclosing the inner wall of the housing 12. The housing 12 is provided with an inlet end 16 at the bottom side of the housing 12 and an outlet end 18 at the top side of the housing 12 in communication with the flow passage 14. More specifically, the housing 12 includes an upper flange seat 20 and a lower flange seat 22 arranged in a 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 disposed at the bottom end of the lower flange seat 22, the outlet end 18 is disposed at the top side of the upper flange seat 20, and the outlet end is further provided with an exhaust flange 26, and the separated gas is exhausted from the exhaust flange 26 through the outlet end 18. An O-ring 32 may be provided at the junction of the exhaust flange 26 and the outlet end 18 to ensure the tightness of the junction.

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

The lower flange seat 22 may be connected to a tank or a cavity of the hydraulic/oil system, for example, the bottom side of the outer sidewall of the lower flange seat 22 is connected to the tank or the cavity of the hydraulic/oil system through a flange, and the connection may also be provided with an O-ring 32 to ensure the sealing performance of the connection.

The rotor system is disposed on the housing 12, and specifically, the rotor system includes a transmission shaft 34 disposed along a vertical direction, a metal screen 36 and an impeller 38 sleeved on the transmission shaft 34, and a driving motor 40 for driving the transmission shaft 34 to rotate. In the illustrated embodiment, the driving motor 40 is mounted on the top of the upper flange seat 20, and the transmission shaft 34 has one end drivingly connected to the driving motor 40 and the other end penetrating the top of the upper flange seat 20 and extending into the flow passage 14.

In the illustrated embodiment, the impeller 38 is located near the connection region of the upper flange seat 20 and the lower flange seat 22, and the side wall of the flow passage 14, i.e. the inner wall of the casing 12, is provided with a plurality of longitudinal guide grooves 42 corresponding to the impeller 38, and preferably, the plurality of longitudinal guide grooves 42 extend in the vertical direction and are uniformly spaced in the circumferential direction. The longitudinal channels 42 are covered with a first metal screen composite layer 44, the oil mist mixed medium enters the flow channel 14 through the inlet end 16 and is thrown by the impeller 38 toward the side wall of the flow channel 14 to separate oil and gas, the separated gas, such as air, is discharged through the outlet end 18, and the separated oil enters the longitudinal channels 42 through the first metal screen composite layer to be recovered, such as to a tank or a cavity of a hydraulic/lubricating oil system. In the illustrated embodiment, the plurality of longitudinal channels 42 and the first metal screen composite layer 44 are disposed at the connecting region of the upper flange seat 20 and the lower flange seat 22, for example, the upper half of the plurality of longitudinal channels 42 is disposed on the inner wall of the upper flange seat 20, and the lower half thereof is disposed on the inner wall of the lower flange seat 22.

As shown in fig. 2, only the upper region of the longitudinal guiding groove 42 on the inner wall of the lower flange seat 22 is covered with the first metal screen composite layer 44, so that when oil is accumulated and flows downwards through the longitudinal guiding groove 42, the oil can flow downwards quickly due to the fact that the lower region of the longitudinal guiding groove 42 is not covered with the first metal screen composite layer 44, and recovery efficiency is improved.

Impeller 38 includes ring portion 46 that the ring-shaped portion 46 that encircles the outside of transmission shaft 34, the portion 48 that extends inwards radially from ring portion 46 top, the portion 50 that extends outwards radially from ring portion 46 bottom towards radially outside and set up a plurality of blades 52 in the portion 50 bottom of extending, and a plurality of blades 52 extend along vertical direction to along the coaxial evenly spaced apart distribution of circumference. The inward extending portion 48 is fixedly connected with the transmission shaft 34 to rotate along with the transmission shaft 34, a spacing space 54 is formed between the impeller 38 and the transmission shaft 34, a plurality of guide holes 56 are uniformly arranged at intervals along the circumferential direction on the annular portion 46, and the guide holes 56 are communicated with the spacing space 54 and the flow channel 14.

In the illustrated embodiment, each of the vanes 52 has a plurality of transverse channels 58 formed on both sides thereof, the plurality of transverse channels 58 are covered with a second metal screen composite layer 60, and the oil mist mixed medium enters the transverse channels 58 through the second metal screen composite layer 60 and is thrown toward the side wall of the flow channel 14. Preferably, a plurality of transverse guide grooves 58 are provided on the entire side of the blade 52, and the plurality of transverse guide grooves 58 extend in the horizontal direction and are uniformly spaced in the vertical direction.

A metal screen 36 is provided on the top side of the impeller 38, and the metal screen 36 is fixedly connected to the rotating shaft 34 to rotate with the rotation of the driving shaft 34. The transmission shaft 34 is further sleeved with an adjusting backing ring 62 and a washer 64, the adjusting backing ring 62 is located on the top side of the metal screen 36, the washer 64 is located on the bottom side of the impeller 38, the bottom of the transmission shaft 34 is further provided with a bolt 66, the washer 64 is located above the bolt 66, the bottom of the washer 64 abuts against the bolt 66, and the inner edge of the bottom of the blade 52 abuts against the outer edge of the top of the washer 64. The gasket 64 also has a flow guiding function, so that after the mist mix medium enters the flow channel 14, the gasket 64 guides the mist mix medium into the transverse guiding grooves 58 of the vanes 52, preventing the mist mix medium from directly entering the space 54 from the bottom of the impeller 38. In other words, adjustment collar 62 is used for the top stop and bolt 66 is used for the bottom stop so that metal screen 36 and impeller 38 are compressed between adjustment collar 62 and washer 64, which together are secured to drive shaft 34.

The following description will be made in detail taking an example in which the oil mist mixed medium is implemented as oil mist mixed air.

In operation, oil mist mixed air in the cavity or tank of the hydraulic/oil system enters the flow passage 14 through the inlet end 16 of the lower flange seat 22 and acts on the rotor system in the flow passage 14, which can rotate at 5000-6000 rpm. Firstly, the blades 52 and the second metal filter screen composite layer 60 on the impeller 38 stir the oil mist mixed air to rotate and do centrifugal motion, most particles of the oil mist move to the side wall of the flow channel 14 under the action of centrifugal force, the first metal filter screen composite layer 44 on the side wall of the flow channel 14 can well capture the oil mist particles, the collision splashing effect of the oil mist particles is reduced or even eliminated, the oil mist is retained in the filter screen, along with the accumulation and convergence of oil liquid and the continuous action of the centrifugal force, the oil liquid can enter the longitudinal diversion trench 42 through the first metal filter screen composite layer 44 to flow downwards and return to the cavity or the oil tank. Meanwhile, the blades 52 of the impeller 38 and the second metal screen composite layer 60 can well catch and collect particles in the oil mist mixed air, collect the particles on the transverse guide grooves 58 on the blades 52, and then throw the particles onto the side wall of the flow channel 14 to be collected and recovered. The mist mixed air enters the space 54 from the underside of the impeller 38 and is then diverted through the flow directing holes 56 in the annular portion 46 to be accelerated and then diverted upwardly, in effect by two centrifugal movements, where the escaping mist particles are separated once, and then the mist mixed air now carries the extremely small mist particles and is captured by the metal screen 36, and the exhausted air is clean. Because the metal screen 36 rotates together with the shaft, under the action of centrifugal force, oil mist particles captured on the metal screen 36 are continuously thrown to the side wall of the flow channel 14 to be collected and recovered, the metal screen 36 is self-cleaned at the same time, the flow resistance of the metal screen 36 is greatly reduced, and the impeller 38 and the flow guide holes 56 also play a role in pushing oil mist mixed air, so that the whole novel centrifugal ventilator 10 can smoothly flow.

The concepts described herein may be embodied in other forms without departing from the spirit or characteristics thereof. The particular embodiments disclosed should be considered illustrative rather than limiting. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. Any changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A novel centrifugal ventilator which can be used for separating oil mist mixed media is characterized by comprising a shell and a rotor system, a flow passage extending along the vertical direction is arranged in the shell, the shell is provided with an inlet end which is communicated with the flow passage and is positioned at the bottom side of the shell and an outlet end which is positioned at the top side of the shell, the rotor system comprises a transmission shaft arranged along the vertical direction, an impeller sleeved on the transmission shaft and a driving motor used for driving the transmission shaft, a plurality of longitudinal diversion trenches are arranged on the side wall of the flow channel, a first metal filter screen composite layer covers the longitudinal diversion trenches, the oil mist mixed medium enters the flow channel through the inlet end and is thrown to the side wall of the flow channel by the impeller so as to separate oil from gas, the separated gas is discharged through the outlet end, and the separated oil enters the longitudinal diversion trench through the first metal filter screen composite layer to be recovered.

2. The novel centrifugal ventilator as claimed in claim 1, wherein the impeller comprises a ring portion annularly disposed on the outer side of the transmission shaft, an inward extending portion extending from the top end of the ring portion toward the radially inner side, an outward extending portion extending from the bottom end of the ring portion toward the radially outer side, and a plurality of blades disposed on the bottom of the outward extending portion, the plurality of blades are coaxially spaced along the circumferential direction, the inward extending portion is fixedly connected to the transmission shaft to rotate with the transmission shaft, a spacing space is provided between the impeller and the transmission shaft, a plurality of flow guiding holes are provided on the ring portion, and the flow guiding holes are communicated with the spacing space and the flow passage.

3. The novel centrifugal ventilator as claimed in claim 2, wherein a plurality of transverse guiding grooves are formed on the blade, a second metal screen composite layer covers a plurality of the transverse guiding grooves, and the oil mist mixed medium enters the transverse guiding grooves through the second metal screen composite layer and is thrown towards the side wall of the flow channel.

4. A novel centrifugal ventilator as claimed in claim 3 wherein a plurality of said longitudinal channels extend in a vertical direction and are circumferentially spaced apart; the plurality of transverse diversion trenches extend along the horizontal direction and are arranged at intervals along the vertical direction.

5. A novel centrifugal ventilator as claimed in claim 2 or 3 in which a metal screen is sleeved on the drive shaft, the metal screen being located on the top side of the impeller and fixed relative to the drive shaft for rotation therewith.

6. The novel centrifugal ventilator of claim 5 wherein the drive shaft further comprises an adjustment grommet and a washer, the adjustment grommet is located on the top side of the metal screen, the washer is located on the bottom side of the impeller, and the bottom of the drive shaft is provided with a bolt.

7. The novel centrifugal ventilator as claimed in claim 5, wherein the housing comprises an upper flange seat and a lower flange seat arranged in a vertical direction, the upper flange seat and the lower flange seat are fixed by a quick-release flange connection, the inlet end is arranged at the bottom end of the lower flange seat, the outlet end is arranged at the top end side of the upper flange seat, and the outlet end is provided with an exhaust flange, and separated gas is exhausted from the exhaust flange through the outlet end.

8. The novel centrifugal ventilator of claim 7 wherein the impeller is positioned adjacent to a connection region of the upper flange seat and the lower flange seat, and the longitudinal channels and the first metal screen composite layer are correspondingly disposed at the connection region of the upper flange seat and the lower flange seat.

9. The novel centrifugal ventilator of claim 7 wherein the junction of the upper flange mount and the lower flange mount is provided with an O-ring seal.

10. The novel centrifugal ventilator of claim 1 wherein the drive motor is disposed at the top of the housing, and the drive shaft is drivingly connected at one end to the drive motor and at the other end extends through the top of the housing and into the housing.