CN208396952U - A kind of jet pump with gas-liquid separation device - Google Patents
A kind of jet pump with gas-liquid separation device Download PDFInfo
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- CN208396952U CN208396952U CN201820989616.XU CN201820989616U CN208396952U CN 208396952 U CN208396952 U CN 208396952U CN 201820989616 U CN201820989616 U CN 201820989616U CN 208396952 U CN208396952 U CN 208396952U
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Abstract
The utility model discloses a kind of jet pumps with gas-liquid separation device.The utility model is equipped with gas-liquid separation device in the gas-liquid separation room of jet pump, the gas-liquid separation device is made of one layer of reticular lamina with certain mesh-density and distribution shape, gas-liquid separation device is close to the outside of injector, and extends to gas-liquid separation chamber's wall surface；The reticular structure of the gas-liquid separation device in a ring runs through entire pump case gas-liquid separation cavity portion, with horizontal plane installation at a certain angle；The top of gas-liquid separation device is between the water outlet and injector reflux inlet of jet pump；The position of the bottom end face injector reflux inlet of gas-liquid separation device, there are a big mesh.The utility model increases a gas-liquid separation device from injector working fluid void fraction is reduced in gas-liquid separation chamber, the anti-cavitation performance improved while improving pump suction capacity.
Description
Technical field
The utility model relates to a kind of jet pump more particularly to a kind of jet pumps that can improve gas-liquid separation efficiency, belong to
Field of fluid machinery.
Background technique
Pump is a kind of abundance, widely used and mechanical to the huge universal fluid of energy requirement, all and industrial stream
The relevant industry of body can almost see the figure of pump.It sends the mechanical energy of prime mover or other energy to liquid, makes
Liquid energy increases, to achieve the purpose that convey liquid and liquid pressurization.Wherein, jet pump is by centrifugal impeller, guide vane, spray
The pump with strong suction capacity of emitter and diversion chamber (gas-liquid separation chamber) composition.Jet pump reliable operation, structure are simple, use
Safe ready, convenient for comprehensive utilization the advantages that, be widely used in agricultural, hydraulic and electric engineering, chemical industry, plumbing and sewage treatment,
The many aspects such as heat supply and refrigeration, especially in high temperature, high pressure, high vacuum and toxic, explosive, the inflammable and radioactive substance of conveying
Occasion, more unique advantage；Jet pump undoubtedly has become an important water pump type after nearly development in 80 years.
As the component of jet pump core, injector primary structure includes nozzle, mixing chamber, trunnion, diffuser.Jet pump
It is similar with multistage centrifugal pump configuration, the pressurization with two-stage.Jet pump includes the pump housing and motor, one end of the pump housing and motor
One end be connected by main shaft, and extend into the pump housing.Centrifugal impeller is equipped in the pump housing, impeller is connected with main shaft and motor drives
Main shaft rotates impeller rotation.Its basic functional principle is after working fluid is obtained kinetic energy under centrifugal impeller high-speed rotation
Into gas-liquid separation chamber, a part of working fluid is sprayed by nozzle at high speeds, while static energy part is converted into kinetic energy.In nozzle
One very strong negative pressure of generation of near exit, the fluid (gas and water or biphase gas and liquid flow) near import will be in this negative pressure
Mixing chamber is inhaled under effect, two strands of liquid carry out mixing and energy exchange in trunnion.The two fluids in trunnion exit
Speed reaches unanimity substantially, and fluid-mixing is finally by diffuser, and with the increase of runner, speed reduction is converted into potential energy, mixes
Conjunction Fluid pressure, which increases, to be finally ejected, and centrifugal impeller is eventually entered, and fluid-mixing passes through centrifugal impeller and does work, and pressure increases
Add, enters the pump housing through guide vane.It pumps intracorporal high-pressure fluid a part to exclude from the outlet of pump, another part then passes through nozzle inlet
Into subsequent cycle.Jet pump acting component mainly has two parts: injector and centrifugal impeller.Injector is acted on by turbulent fluctuation
It improves by the energy of suction fluid, and centrifugal impeller then acts on the energy for improving liquid by centrifugal force.
In fact, although this conventional spray pump self-priming speed compared with suction lift it is different types of under Same Efficieney
Pump, has had a no small advantage, but its suction capacity still has a considerable improvement space.Why is the suction capacity of conventional spray pump
It is stronger mainly to have following two points: first is that, injector can be formed very steady under the driving for having pressure working fluid in jet pump
Fixed and powerful suction capacity；Second is that the axial direction pumped in interior gas-liquid separation room (is parallel to injection under the inhibition of centrifugal guide vane
Device is central axial) flowing velocity is controlled in a very small level, and this has stopped the sufficient time for the floating of bubble, together
When may insure that bubble as few as possible is mixed into injector return port and weakens self-priming.Wherein, the gas of injector working fluid
Meltage has important influence to the suction capacity of pump, in other words, when the void fraction in pump is higher, its suction capacity
It is poorer.The utility model increases gas-liquid point from injector working fluid void fraction is reduced in gas-liquid separation chamber
From device, the anti-cavitation performance improved while improving pump suction capacity.
Summary of the invention
For the still halfway problem of gas-liquid separation in existing jet pump, the purpose of this utility model is that giving conventional spray
Pump is equipped with a kind of gas-liquid separation device in gas-liquid separation room, to be obviously improved the suction capacity and anti-cavitation performance of jet pump.
The utility model technical solution adopted for solving the technical problem are as follows:
Gas-liquid separation device is installed in the gas-liquid separation room of jet pump, the gas-liquid separation device has one by one layer
The reticular lamina for determining mesh-density and distribution shape is constituted, and gas-liquid separation device is close to the outside of injector, and extends to gas-liquid point
From locular wall face；The reticular structure of the gas-liquid separation device in a ring runs through entire pump case gas-liquid separation cavity portion, with level
Face installation at a certain angle；The top of gas-liquid separation device between the water outlet and injector reflux inlet of jet pump,
It is discharged convenient for bubble from water outlet in water outlet far from centrifugal guide vane side；The bottom end face injector of gas-liquid separation device
The position of reflux inlet, there are a big mesh, to effectively reduce between injector reflux inlet and centrifugal guide vane outlet
Flow resistance keeps the pressure and gas-liquid separation effect of injector working fluid to greatest extent.
Furtherly, the gas-liquid separation device is fabricated by hydrophilic material.
Furtherly, the gas-liquid separation device forms an angle with horizontal planeθ,θRange be 90 ° ~ 135 °.
Furtherly, gas-liquid separation device distance injection pump discharge is 0.01D- 1.0D,DFor the outlet of jet pump
Diameter.
Furtherly, single mesh minimal characteristic scale is 0.8 in the reticular structureD 1~3.0D 1,D 1For pump case chamber
The scale of minimum visual bubble in vivo.
Furtherly, the characteristic dimension of the big mesh is 1.0D ~ 2.0D.
By using above technical scheme, have the beneficial effect that
1, the reticular structure in the gas-liquid separation device in the utility model uses hydrophilic material.Mainly by
In water wetted material surface is easy to be moistened by liquid, and when fluid and net one continuous phase of composition, fluid can be normal through dress
It sets, bubble can not pass through, and the reflux of barrier bubble accelerates bubble floating, to the maximum extent speed up gas and liquid separation and axial flowing resistance
The reduction of power reduces the bubble volume concentration of reflux fluid, is obviously improved the kinetic energy and pressure potential of reflux fluid, reinforces to spray
Penetrate the suction capactity of gas in pump inlet pipeline.
2, compared to traditional separator, the reticular structure of device is made of water wetted material in the utility model, benefit
With the characteristic of water wetted material itself, working fluid is enable directly by device, to reduce the flow resistance from reflux, to greatest extent
Guarantee the energy loss of reflux fluid, hence it is evident that reduce the void fraction of reflux fluid.When avoiding mesh by gas bubble blockage, fluid without
Method normal reflow influences the efficiency that flows back.
3, compared with traditional jet pump, since in reflux, bubble can not be subtracted working fluid by gas-liquid separation device
The void fraction of small injector working fluid improves gas-liquid separation efficiency, realizes the self-suction function and anti-cavitation performance of jet pump,
The increase of highest suction, flow also increase with it.
4, the raising of gas-liquid separation efficiency can also reduce noise to a certain extent, improve the service condition of pump.
5, gas-liquid separation device be with horizontal plane installation at a certain angle, avoid bubble in online accumulation and cause work
The case where fluid reflux is obstructed, bubble can effectively float, convenient for the exclusion of bubble.
6, the gas-liquid separation device structure of the utility model is simple, easy for installation, difficulty of processing is small, light weight, will not be right
The working performance of jet pump has an impact, and the jet pump of this installation gas-liquid separation device adapts to different operating conditions, increases
The working range of jet pump.
Detailed description of the invention
Fig. 1 is velocity diagram of the single isolated bubbles in jet pump；
Fig. 2 is the structural schematic diagram of the jet pump of gas-liquid separation device described in the utility model；
Appended drawing reference: 1, water inlet；2, water injection hole；3, water outlet；4, pump housing shell；5, pump housing rear cover；6, jet pipe；7, close
Seal；8, nozzle entry cavity；9, gas-liquid separation chamber；10, guide vane；11, centrifugal impeller；12, diffuser；13, gas-liquid separation fills
It sets, 14, injector reflux inlet, 15, pump case cavity；
Fig. 3 is gas-liquid separation device structure chart.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution in the utility model, below in conjunction with this reality
With the attached drawing in novel, clear, complete description is carried out to the technical solution in utility model, it is clear that described is only this
Utility model a part of the embodiment, instead of all the embodiments.Embodiment based on utility model, ordinary skill people
Member's every other embodiment obtained without making creative work, all should belong to the model of utility model protection
It encloses.
The technical solution adopted in the utility model is: installing gas-liquid separation device in the gas-liquid separation room of jet pump.Gas
Liquid separating apparatus is made of one layer of reticular lamina with certain mesh-density and distribution shape, is close to the outside of injector, and prolong
Extending to gas-liquid separation chamber's wall surface, i.e., this device is ring-shaped reticular structure, run through entire pump case gas-liquid separation cavity portion, with
Horizontal plane installation at a certain angle, and the top of device is between the water outlet and injector reflux inlet of jet pump, i.e.,
In water outlet far from centrifugal guide vane side, it is discharged convenient for bubble from water outlet；The bottom end face injector of gas-liquid separation device returns
The position of inflow entrance, there are a big mesh, to effectively reduce between injector reflux inlet and centrifugal guide vane outlet
Flow resistance keeps the pressure and gas-liquid separation effect of injector working fluid to greatest extent.Gas-liquid separation device can accelerate
Gas-liquid separation in gas-liquid separation room, improves the cavitation resistive property of pump, while enhancing flow uniformity in pump chamber.
The working principle of the utility model is mainly that fluid-mixing is done work after diffuser ejection by centrifugal impeller, is flowed
Body pressure increase enters the pump housing through guide vane, pumps intracorporal high-pressure fluid a part and is discharged from the water outlet of pump, another part work
Fluid first passes through reflux after gas-liquid separation device carries out gas-liquid separation and is again introduced into nozzle entry cavity, loops back and forth like this, week
And it renews.When working fluid return, liquid can enter nozzle normal through device, and most of bubble can be then intercepted in fluid
Get off, as most of high-pressure fluid is discharged from pump housing outlet, completes gas-liquid separation.Wherein, when jet pump is in self-priming exhaust
In the stage, entrance is gas by suction fluid, in jet pipe together with the working fluid of inoculated under the action of nozzle exit strong negative pressure
Outlet mutually converges, enters impeller pressurization after diffuser mixing, then in gas-liquid separation chamber since gas-liquid point occurs for the floating of bubble
From fluid-mixing carries out a gas-liquid separation again when passing through gas-liquid separation device, complete exhaust.Under the influence of reticular structure,
Due to drag effect, the fluid of inoculated is difficult to fill entire pump case cavity, and the big mesh stayed on the downside of device is aiming at this feelings
Condition can effectively reduce the flow resistance between injector reflux inlet and centrifugal guide vane outlet, make working fluid timely
Reflux guarantees gas-liquid separation effect and keeps the pressure of injector working fluid.Wherein, pump case cavity refer to inside pump case except into
Overall space outside mouth space and centrifugal impeller and its guide vane, including gas-liquid separation chamber, gas-liquid separation device void space, gas-liquid
The space of separator and reflux inlet side.
Separator and horizontal plane form an angle installation, are in order to allow bubble more effectively to float, reduction bubble is in net
Upper delay.Cardinal principle enters gas-liquid separation chamber through guide vane, in two phase flow as shown in Figure 1, two phase flow is done work by centrifugal impeller
Bubble can have a speed in the horizontal direction, according to resolution of velocity theorem, this speed can be decomposed into one and device table
The parallel rate of climb in face and a component velocity vertical with this apparatus surface, when two phase flow passes through separator, by
In bubble a shock can not can be generated with device, loses part energy, component velocity can disappear by the mesh in device, bubble
It loses, leaves behind a rate of climb parallel with device, accelerate the floating of bubble.Around this principle, by adjusting inclination angle
Degree increases bobble rise velocity, bubble can more effectively be floated, to improve gas-liquid separation to reduce stroke speed
Efficiency.Reticular structure in device is made of hydrophilic material, and the characteristic of hydrophilic material is that surface is easy to by water-wet
Profit.When fluid passes through gas-liquid separation device, fluid permeable reticular structure forms a continuous phase system, avoids bubble and exists
When online accumulation, cutting continuous phase causes working fluid return to be obstructed.
The gas-liquid separation device is covered with the annular space between jet pump device outside wall surface and gas-liquid separation chamber's wall surface, root
According to needs, the tilt angle of separator and horizontal plane is adjusted, angle is mainly determined by bubble axial velocity, that is, flows to separate mesh
Speed, select the optimal tilt angle of effect, as grid density degree depend on gas-liquid separation room in bubble assemblage
Average dimension, concentration.
The gas-liquid separation device forms an angle with horizontal planeθ,θRange can according to need 90 ° ~ 135 ° adjust
It is whole,θIt is the tilt angle of device and horizontal plane.
The separator is installed between pump discharge and return passage, is 0.01 apart from pump dischargeD- 1.0D,DFor injection
The outlet diameter of pump.
The single mesh minimal characteristic scale of the reticular structure is about 0.8D 1~3.0D 1,D 1It can for minimum in pump case cavity
Depending on the scale of bubble.
The characteristic dimension of the big mesh stayed under the device is 1.0D ~ 2.0D.
The hole of the separator net can be the combination of any one shape or the mesh of various shapes.
The utility model is described further referring to Fig. 2: in the present embodiment for convenience understand, gas-liquid separation device with
Horizontal plane.One end of the pump housing is connected with one end of motor by main shaft, and is extend into the pump housing.It is equipped in pump housing shell 4
Centrifugal impeller 11, centrifugal impeller 11 are connected with main shaft, and motor drives main shaft rotation that centrifugal impeller 11 is driven to rotate, centrifugal impeller 11
The other side and the coaxial loose fit of guide vane 10, guide vane 10 be connected again with diffuser 12.Jet pipe 6 and cavity junction are cased with sealing ring
7.The front end of pump is equipped with water inlet 1, and upper end is equipped with water outlet 3, and the front end of water outlet is equipped with water filling port 2, connect with pump housing shell 4
Be pump housing rear cover 5.Wherein, nozzle entry cavity 8 is connected with injector reflux inlet 14, and working fluid sprays at a high speed from here
Out, diffuser 12 is mixed by suction fluid.In addition, it is equipped with a gas-liquid separation device 13 inside gas-liquid separation chamber 9,
Under the conditions of each, gas-liquid separation in pump case cavity can be accelerated, improve the efficiency of gas-liquid separation, while being enhanced in pump chamber
Flow uniformity.Gas-liquid separation device is fixed on pump housing interior of shell wall surface, is mounted on the outside of diffuser, entire pump case
Cavity 15 separates, the ring mesh structure of the device, runs through entire pump case gas-liquid separation cavity portion.
By taking attached gas-liquid separation device shown in Fig. 3 as an example, illustrates the key effect of gas-liquid separation device and use hydrophily material
Where the advantage for expecting manufacture.When jet pump is in from pumping phases, interior gas-liquid two-phase fluid passes through centrifugal impeller in diffuser 12
11 be injected into gas-liquid separation chamber 9 after pressurization, speed-raising and the water conservancy diversion of guide vane 10, at this point, due to the stream in pump case cavity 15
Under the action of 11 high speed rotation of centrifugal impeller, the fluid of inoculated is generally difficult to fill entire pump case cavity 15 body, in addition centrifugation
The effect of impeller 11 and guide vane 10 to biphase gas and liquid flow, the gas-liquid two-phase fluid for flowing into gas-liquid separation chamber 9 is often that edge is similar to
The movement of helical trajectory flows to pump intake direction.In 13 bottom end vicinity of gas-liquid separation device, bubble needs overcome bigger resistance
The region could be entered with axial mainstream, along with bubble will receive the effect of buoyancy, therefore the air bubble content in the region is very
It is few, therefore it can be not provided with grid in the area, allowing reflux fluid to enter, injector reflux inlet 14 is smaller by resistance, flows
More smooth, working fluid obtains significantly more efficient reflux；In working stage, since the meshing in gas-liquid separation device covers
Entire gas-liquid separation chamber 9 has been covered, can effectively have been kept apart the bubble in biphase gas and liquid flow from liquid, reflux fluid is reduced
Void fraction, stablize and accelerate self-injection pump pump inner cyclic process in gas-liquid mixed and improve gas-liquid separation efficiency.Meanwhile
It is significantly increased by the fluid flow uniformity after gas-liquid separation device 13, flow velocity reduces, pressure enhancing, the kinetic energy conversion of fluid
At pressure potential, the pressure difference between inlet chamber and impeller eye is increased, is conducive to the loss of momentum for reducing reflux fluid, accelerates
Gas-liquid mixed in nozzle entry cavity 8, to accelerate self-priming.
The reticular structure of the gas-liquid separation device is suitable with water wetted material comparison.Compared with other materials, hydrophily
The advantage of material is apparent.Reticular structure made of traditional material, although can by two phase flow bubble and fluid separate
It comes, but there are many bubbles often not directly off separator, to be detained within a grid, be not excluded, lead to device
In grid be blocked so that working fluid can not normal reflow, influence flow back efficiency, and the surface of water wetted material be easy by liquid
Body is wet, and after being wet, fluid can form a continuous phase with grid, using the characteristic of fluid itself, even if the net in device
Lattice are plugged, and fluid directly can also pass through device by grid, not only reduce the flow resistance to flow back from pumping phases, are guaranteed
The energy loss of reflux fluid, and it can also be substantially reduced the void fraction of reflux fluid, improve gas-liquid separation efficiency.
The above is only the preferred embodiment of the utility model, not imposes any restrictions to the utility model, all
According to any simple modification to the above embodiments of the utility model technical spirit, change and equivalent structural changes, still
Belong in the protection scope of technical solutions of the utility model.
Claims (6)
1. a kind of jet pump with gas-liquid separation device, it is characterised in that: be equipped with gas in the gas-liquid separation room of jet pump
Liquid separating apparatus, the gas-liquid separation device are made of one layer of reticular lamina with certain mesh-density and distribution shape, gas-liquid
Separator is close to the outside of injector, and extends to gas-liquid separation chamber's wall surface；The gas-liquid separation device in a ring netted
Structure runs through entire pump case gas-liquid separation cavity portion, with horizontal plane installation at a certain angle；The top of gas-liquid separation device
Between the water outlet and injector reflux inlet of jet pump, i.e., in water outlet far from centrifugal guide vane side, convenient for bubble from
Water outlet discharge；The position of the bottom end face injector reflux inlet of gas-liquid separation device, there are a big mesh, to effective
Reduce the flow resistance between injector reflux inlet and centrifugal guide vane outlet, keeps the pressure of injector working fluid to greatest extent
Power and gas-liquid separation effect.
2. a kind of jet pump with gas-liquid separation device according to claim 1, it is characterised in that: the gas-liquid separation
Device is fabricated by hydrophilic material.
3. a kind of jet pump with gas-liquid separation device according to claim 1, it is characterised in that: the gas-liquid point
It forms an angle from device and horizontal planeθ,θRange be 90 ° ~ 135 °.
4. a kind of jet pump with gas-liquid separation device according to claim 1, it is characterised in that: the gas-liquid point
It is 0.01 that pump discharge is sprayed with a distance from deviceD- 1.0D,DFor the outlet diameter of jet pump.
5. a kind of jet pump with gas-liquid separation device according to claim 1, it is characterised in that: the netted knot
Single mesh minimal characteristic scale is 0.8 in structureD 1~3.0D 1,D 1For the scale of visual bubble minimum in pump case cavity.
6. a kind of jet pump with gas-liquid separation device according to claim 1, it is characterised in that: the big mesh
Characteristic dimension be 1.0D ~ 2.0D,DFor the outlet diameter of jet pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820989616.XU CN208396952U (en) | 2018-06-26 | 2018-06-26 | A kind of jet pump with gas-liquid separation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820989616.XU CN208396952U (en) | 2018-06-26 | 2018-06-26 | A kind of jet pump with gas-liquid separation device |
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| CN208396952U true CN208396952U (en) | 2019-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661919A (en) * | 2018-06-26 | 2018-10-16 | 中国计量大学 | Jet pump with gas-liquid separation device |
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2018
- 2018-06-26 CN CN201820989616.XU patent/CN208396952U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108661919A (en) * | 2018-06-26 | 2018-10-16 | 中国计量大学 | Jet pump with gas-liquid separation device |
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