CN208381323U - A kind of twin-stage phase transformation labyrinth seal structure - Google Patents
A kind of twin-stage phase transformation labyrinth seal structure Download PDFInfo
- Publication number
- CN208381323U CN208381323U CN201820976891.8U CN201820976891U CN208381323U CN 208381323 U CN208381323 U CN 208381323U CN 201820976891 U CN201820976891 U CN 201820976891U CN 208381323 U CN208381323 U CN 208381323U
- Authority
- CN
- China
- Prior art keywords
- annular groove
- pressure
- labyrinth seal
- seal structure
- twin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a kind of twin-stage phase transformation labyrinth seal structures, belong to cryogenic pump field, it solves part sealed medium and passes through labyrinth seal structure, to cause the leakage of sealed medium, its key points of the technical solution are that, including axle sleeve and main shaft, the sleeve lining offers annular groove, the axle sleeve offers the air inlet being connected to annular groove, the air inlet is passed through blanket gas, the utility model is structurally reasonable, increase the pressure in annular groove, reduce annular groove and the indoor pressure difference of pump chamber, purpose is leaked from labyrinth seal structure to reach and reduce sealed medium.
Description
Technical field
The utility model relates to a kind of cryogenic pumps, more specifically, it relates to a kind of twin-stage phase transformation labyrinth seal structure.
Background technique
Labyrinth seal, which refers to, to be made to leak reduced sealing there are many tortuous cell between rotational parts and retaining element, more
It for cryogenic pump, is provided between driving motor and the pump chambers of cryogenic pump, prevents being situated between in low temperature pump chambers by sealing
Matter is leaked to the motor side of axis.
Currently, a kind of labyrinth seal structure, as shown in Figure 1, including main shaft and axle sleeve, the main shaft and axle sleeve are in rotation
It connects, offers annular groove on the sleeve lining, the main shaft is connected to motor, and the other end protrudes into where sealed medium
Chamber, one end that the main shaft is connected to motor is spindle motor end, and the other end of the main shaft is main axis chamber end.It utilizes
Gap between main shaft and axle sleeve forms gap of shutting off, and expansion clearance is formed between annular groove and main shaft, between alternately shutting off
Gap and expansion cavity, sealed medium generate throttle effect when through the gap in tortuous labyrinth and achieve the purpose that Drain Resistance.
But sealed medium still suffers from a part by labyrinth seal structure in above-mentioned technical proposal, thus cause by
The leakage of sealing medium.
Utility model content
In view of the deficienciess of the prior art, increasing the utility model lies in that provide a kind of twin-stage phase transformation labyrinth seal structure
Add the pressure in annular groove, reduce annular groove and the indoor pressure difference of pump chamber, is situated between to reach and reduce by sealing
Matter leaks purpose from labyrinth seal structure.
To achieve the above object, the utility model provides following technical solution: a kind of twin-stage phase transformation labyrinth seal structure,
Including axle sleeve and main shaft, the sleeve lining offers annular groove, and the axle sleeve offers the air inlet being connected to annular groove
Hole, the air inlet are passed through blanket gas.
By using above-mentioned technical proposal, blanket gas is passed through annular groove, increases the pressure in annular groove, reduces
Annular groove and the indoor pressure difference of pump chamber, leak from labyrinth seal structure to reduce sealed medium.
The utility model is further arranged to: the axle sleeve offers the venthole being connected to annular groove.
By using above-mentioned technical proposal, gap location of the part sealed medium between main shaft and axle sleeve leaks into ring
In connected in star, sealed medium can vaporize in annular groove, and blanket gas is mixed with the sealed medium of vaporization, mixed gas
Body is discharged from venthole, reduces the leakage of sealed medium, leaks to reduce sealed medium to motor, prevents from being sealed Jie
Matter corrosion and damage motor.
The utility model is further arranged to: the annular groove at least there are two, the air inlet and venthole difference
It is connected to one of annular groove.
By using above-mentioned technical proposal, the quantity of annular groove is increased, enhances the labyrinth effect of sealing structure, into
One step enhances sealing effect, and air inlet and venthole are connected to two annular grooves respectively, is reduced using labyrinth effect close
The leakage for the gas that envelope gas is mixed with the sealed medium of vaporization.
The utility model is further arranged to: there are three the annular grooves, and there are two the air inlets, described in two into
Stomata is connected to the annular groove close to main shaft both ends respectively.
By using above-mentioned technical proposal, gap location of the part sealed medium between main shaft and axle sleeve, which leaks into, to be leaned on
In the annular groove of nearly pump housing, sealed medium can vaporize in annular groove, and the sealed medium of blanket gas and vaporization is mixed
The gas of conjunction, the gap between main shaft and axle sleeve enter in intermediate annular groove, then from intermediate annular groove from out
Stomata discharge, close to spindle motor end annular groove in blanket gas can the gap between main shaft and axle sleeve enter intermediate ring
In connected in star, to be further reduced gas that blanket gas is mixed with the sealed medium of vaporization to the motor side of main shaft, prevent
Sealed medium corrosion and damage motor.
The utility model is further arranged to: the pressure in the annular groove far from spindle motor end is greater than by paraxial
The pressure of the sealed medium of set.
By using above-mentioned technical proposal, increases the pressure in the indoor annular groove of pump chamber, further increase pump
The resistance of the indoor sealed medium flowing of chamber, is further reduced sealed medium leakage.
The utility model is further arranged to: the venthole is connected to intermediate annular groove, is connected to venthole
The pressure of the annular groove is less than the pressure in the annular groove far from spindle motor end.
By using above-mentioned technical proposal, make the annular groove being connected to venthole and close to the indoor annular groove of pump chamber
Between form pressure difference, the gas for mixing the sealed medium of blanket gas and vaporization is to the annular groove stream being connected to venthole
It is dynamic, to prevent blanket gas from entering in pump chambers by the gap between main shaft and axle sleeve, blanket gas pollution is prevented to be situated between by sealing
Matter.
The utility model is further arranged to: the pressure in the annular groove at spindle motor end is greater than to be connected with venthole
The pressure of the logical annular groove.
By using above-mentioned technical proposal, make annular of the blanket gas in the annular groove at spindle motor end to centre
It is flowed in groove, the gas for preventing blanket gas from mixing with the sealed medium of vaporization is flowed to spindle motor end.
The utility model is further arranged to: the axle sleeve offers the detection hole with the chamber of pump.
It, can be more accurately in pump chambers close to axle sleeve one end by detection hole by using above-mentioned technical proposal
Pressure, so as to more accurately adjust three annular grooves in pressure.
The utility model is further arranged to: the detection hole is communicated with first pressure sensor, and the first pressure passes
Sensor signal is connected with data handling component, and the data handling component is electrically connected with pressure-regulating valve, the pressure-regulating valve
There are three be connected to two air inlets and venthole respectively.
By using above-mentioned technical proposal, the indoor pressure of pump chamber is detected using first pressure detection components, it then will inspection
Then the data transmission of survey controls the pressure in pressure-regulating valve three annular grooves of adjusting to data handling component.
The utility model is further arranged to: three annular grooves are communicated with second pressure sensor, and described
Two pressure sensors detect the pressure in annular groove respectively, and the second pressure sensor is connect with data handling component.
By using above-mentioned technical proposal, the pressure in three annular grooves is detected using second pressure detection components, so
Then the data transmission that will test afterwards controls pressure-regulating valve and adjusts pressure in three annular grooves to data handling component,
Pressure in more accurate three annular grooves of control.
In conclusion the utility model has the following beneficial effects:
First, blanket gas is passed through annular groove, increases the pressure in annular groove, reduce annular groove and pump chambers
Interior pressure difference is leaked from labyrinth seal structure to reduce sealed medium；
Second, the pressure in three arc grooves of control, induction seal gas and the medium sealed are recessed to intermediate annular
Slot flowing, is then discharged again from venthole, reduces the motor side to main shaft of sealed medium, prevents sealed medium corrosion damage
Bad motor protects motor, increases the service life of motor；
Third, using intermediate annular groove and the pressure difference between the indoor annular groove of pump chamber, make blanket gas with
The gas of the sealed medium mixing of vaporization is to the annular groove flowing being connected to venthole, to prevent blanket gas from passing through main shaft
Gap between axle sleeve enters in pump chambers, prevents blanket gas from polluting sealed medium；
Fourth, using first pressure sensor, second pressure sensor, data handling component and pressure-control valve, more
The pressure being accurately controlled in three annular grooves.
Detailed description of the invention
Fig. 1 is the sectional view of embodiment 1；
Fig. 2 is the sectional view of embodiment 2；
Fig. 3 is the line frame graph that embodiment 2 is used to show regulating device.
Appended drawing reference: 1, pump housing shell；11, pump chambers；2, axle sleeve；21, annular groove；211, the first annular groove；212,
Two annular grooves；213, third annular groove；24, air inlet；25, venthole；26, detection hole；3, regulating device；31, air inlet pipe；32, go out
Tracheae；33, first pressure sensor；34, second pressure sensor；35, pressure-regulating valve；36, PLC controller；4, main shaft.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
The same or similar label correspond to the same or similar components in the attached drawing of the utility model embodiment；It is practical at this
In novel description, it is to be understood that if the orientation or positional relationship for having the instructions such as term " on ", "lower", "left", "right" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore retouch in attached drawing
The term for stating positional relationship only for illustration, should not be understood as the limitation to this patent, for the common skill of this field
For art personnel, the concrete meaning of above-mentioned term can be understood as the case may be.
Embodiment 1: a kind of twin-stage phase transformation labyrinth seal structure, as shown in Figure 1, including pump housing shell 1, main shaft 4 and axle sleeve
2.Pump chambers 11 are offered in pump housing shell 1, pump chambers 11 are provided with sealed medium, and sealed medium is low-temperature liquid oxygen.Axis
Set 2 is interference fitted with pump housing shell 1, and main shaft 4 is placed through in axle sleeve 2 and the two is rotatablely connected, 4 left end of main shaft and motor (figure
In be not shown) connection, the other end protrudes into pump chambers 11, and 2 inner wall of axle sleeve opens up that there are three annular groove 21, three annular grooves
21 are followed successively by the first annular groove 211, the second annular groove 212 and third annular groove 213 from right to left, between main shaft 4 and axle sleeve 2
Gap forms gap of shutting off, and expansion clearance is formed between annular groove 21 and main shaft 4, and alternately shut off gap and expansion cavity, quilt
Sealing medium generates throttle effect when through the gap in tortuous labyrinth and achievees the purpose that Drain Resistance.
As shown in Figure 1, axle sleeve 2 opens up two air inlets 24 and a venthole 25, two air inlets 24 are respectively with first
Annular groove 211 is connected to third annular groove 213, and venthole 25 is connected to the second annular groove 212, by air inlet 24 to the first annular groove 211
With blanket gas is passed through in the second annular groove 212, blanket gas is nitrogen.Blanket gas is passed through in the first annular groove 211, increases by the first annular groove
Pressure in 211 makes the pressure in the first annular groove 211 be greater than pump chambers 11 close to the pressure of 4 one end of main shaft, further increases pump
The resistance of sealed medium flowing in chamber 11, is further reduced sealed medium leakage.
As shown in Figure 1, gap location of the part sealed medium between main shaft 4 and axle sleeve 2 leaks into the first annular groove 211
In, sealed medium can be vaporized in the first annular groove 211 in gas, and blanket gas is mixed with the sealed medium of vaporization, then portion
Point mixed gas can the gap between main shaft 4 and axle sleeve 2 enter in the second annular groove 212, pass through venthole 25 from second
It is discharged in annular groove 212, to be further reduced the motor side of gas that blanket gas is mixed with the sealed medium of vaporization to main shaft 4
Leakage, prevents sealed medium corrosion and damage motor.Pressure in second annular groove 212 is less than pump chambers 11 close to 4 one end of main shaft
Pressure, make the pressure difference formed between the second annular groove 212 and the first annular groove 211, make the sealed medium of blanket gas and vaporization
Mixed gas is flowed to the second annular groove 212, to prevent blanket gas from entering pump by the gap between main shaft 4 and axle sleeve 2
In chamber 11, prevent blanket gas from polluting sealed medium.
As shown in Figure 1, the pressure in third annular groove 213 is identical as the pressure in the first annular groove 211, make third annular groove 213
Pressure difference is formed between the second annular groove 212, blanket gas flows to the right second from by the gap between main shaft 4 and axle sleeve 2
In annular groove 212, the gas for further preventing blanket gas to mix with the sealed medium of vaporization is flowed to 4 motor side of main shaft.
As shown in Figure 1,2 right end of axle sleeve offers the detection hole 26 being connected to pump chambers 11, it can be more by detection hole 26
Add accurately in pump chambers 11 close to the pressure of 2 one end of axle sleeve, it is recessed so as to more accurately adjust three annulars of class
Pressure in slot 21.
Specific working mode: being passed through blanket gas into the first annular groove 211, third annular groove 213, makes the first annular groove 211 and
Air pressure is greater than the air pressure in pump chambers 11 in three annular grooves 213, to reduce the leakage of sealed medium.Part sealed medium from
Gap location between main shaft 4 and axle sleeve 2 leaks into the first annular groove 211, and sealed medium can vaporize in the first annular groove 211
In gas, blanket gas is mixed with the sealed medium of vaporization, and then the mixed gas in part can be between main shaft 4 and axle sleeve 2
Gap enter the second annular groove 212 in, and in third annular groove 213 pressure be greater than the second annular groove 212 in pressure to mixing after
Gas can be discharged by venthole 25, to be further reduced gas that blanket gas is mixed with the sealed medium of vaporization to master
The motor side of axis 4 prevents sealed medium corrosion and damage motor.
Embodiment 2: a kind of twin-stage phase transformation labyrinth seal structure, as shown in Figures 2 and 3, difference from Example 1 is
It further include regulating device 3, regulating device 3 includes air inlet pipe 31, escape pipe 32, detection components, data handling component and pressure tune
Save valve 35.Air inlet pipe 31 and escape pipe 32 are connected on pump housing shell 1 by joint screw thread, and there are two air inlet pipe 31 and difference
It is connected to two air inlets 24, air inlet pipe 31 is connected to far from one end of axle sleeve 2 with pneumatic supply, and escape pipe 32 and venthole 25 connect
Logical, escape pipe 32 is communicated with the atmosphere far from one end of axle sleeve 2.Detection components include first pressure detection components and second pressure inspection
Survey component.First pressure detection components include first pressure sensor 33, and first pressure sensor 33 is connected to detection hole 26, and
And first pressure sensor 33 will test the closing of hole 26, detect the pressure in pump chambers 11 using first pressure sensor 33；The
Two pressure detecting assemblies include three second pressure sensors 34, three second pressure sensors 34 respectively with air inlet pipe 31 and out
Tracheae 32 is connected to, thus the pressure in the first annular groove 211 of detection, the second annular groove 212 and third annular groove 213, first pressure sensing
Device 33 and second pressure sensor are connect with data handling component signal.There are three pressure-regulating valves 35 and is respectively arranged in two
In a air inlet pipe 31 and escape pipe 32, the first annular groove 211,212 and of the second annular groove are adjusted respectively using three pressure-regulating valves 35
Third annular groove 213.Three pressure-regulating valves 35 are electrically connected with data handling component respectively.Data handling component includes PLC control
Device 36 will test the signal that component transmits and be handled, and the data that then will test are compared with preset value, if not
Meet preset value, then passes through the air pressure in 35 first annular groove 211 of pressure-regulating valve, the second annular groove 212 and third annular groove 213.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (10)
1. a kind of twin-stage phase transformation labyrinth seal structure, including axle sleeve (2) and main shaft (4), axle sleeve (2) inner wall offers annular
Groove (21), it is characterized in that: the axle sleeve (2) offers the air inlet (24) being connected to annular groove (21), the air inlet
(24) it is passed through blanket gas.
2. a kind of twin-stage phase transformation labyrinth seal structure according to claim 1, it is characterized in that: the axle sleeve (2) offers
The venthole (25) being connected to annular groove (21).
3. a kind of twin-stage phase transformation labyrinth seal structure according to claim 2, it is characterized in that: the annular groove (21) is extremely
There are two few, the air inlet (24) and venthole (25) are connected to one of annular groove (21) respectively.
4. a kind of twin-stage phase transformation labyrinth seal structure according to claim 3, it is characterized in that: the annular groove (21) has
Three, there are two the air inlets (24), two air inlets (24) respectively with close to main shaft (4) both ends annular groove
(21) it is connected to.
5. a kind of twin-stage phase transformation labyrinth seal structure according to claim 4, it is characterized in that: far from main shaft (4) motor side
The annular groove (21) in pressure be greater than close to axle sleeve (2) sealed medium pressure.
6. a kind of twin-stage phase transformation labyrinth seal structure according to claim 5, it is characterized in that: the venthole (25) is in
Between annular groove (21) connection, the pressure of the annular groove (21) be connected to venthole (25) is less than separate main shaft (4)
Pressure in the annular groove (21) of motor side.
7. a kind of twin-stage phase transformation labyrinth seal structure according to claim 6, it is characterized in that: close to main shaft (4) motor side
Annular groove (21) in pressure be greater than the pressure of the annular groove (21) being connected to venthole (25).
8. a kind of twin-stage phase transformation labyrinth seal structure according to claim 7, it is characterized in that: the axle sleeve (2) offers
With the detection hole (26) of the chamber of pump.
9. a kind of twin-stage phase transformation labyrinth seal structure according to claim 8, it is characterized in that: the detection hole (26) is connected to
Have first pressure sensor (33), first pressure sensor (33) signal is connected with data handling component, at the data
Reason component be electrically connected with pressure-regulating valve (35), the pressure-regulating valve (35) there are three respectively with two air inlets (24) and out
Stomata (25) connection.
10. a kind of twin-stage phase transformation labyrinth seal structure according to claim 9, it is characterized in that: three annular grooves
(21) it is communicated with second pressure sensor (34), the second pressure sensor (34) is detected in annular groove (21) respectively
Pressure, the second pressure sensor (34) connect with data handling component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820976891.8U CN208381323U (en) | 2018-06-25 | 2018-06-25 | A kind of twin-stage phase transformation labyrinth seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820976891.8U CN208381323U (en) | 2018-06-25 | 2018-06-25 | A kind of twin-stage phase transformation labyrinth seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208381323U true CN208381323U (en) | 2019-01-15 |
Family
ID=64964336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820976891.8U Active CN208381323U (en) | 2018-06-25 | 2018-06-25 | A kind of twin-stage phase transformation labyrinth seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208381323U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626403A (en) * | 2018-06-25 | 2018-10-09 | 杭州新亚低温科技有限公司 | A kind of twin-stage phase transformation labyrinth seal structure |
-
2018
- 2018-06-25 CN CN201820976891.8U patent/CN208381323U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626403A (en) * | 2018-06-25 | 2018-10-09 | 杭州新亚低温科技有限公司 | A kind of twin-stage phase transformation labyrinth seal structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100487237C (en) | Leakage checking up device for fuel oil vapour eliminating system | |
| US9506787B2 (en) | Differential pressure measuring device having a shut-off body with a constriction in the flow channel | |
| US5560392A (en) | Valve for a measuring device | |
| IE920863A1 (en) | Fugitive emission sealing assembly | |
| US9267614B2 (en) | External seal structure of vacuum valve | |
| JP2006291853A (en) | Leak inspection device and fuel vapor treatment device | |
| CN208381323U (en) | A kind of twin-stage phase transformation labyrinth seal structure | |
| CN105485038B (en) | A kind of double mechanical seal monitoring device of centrifugal fluid pump | |
| CN106224631A (en) | A kind of breather valve on-line measuring device and method | |
| US6182502B1 (en) | Diagnostic module for testing the tightness of a container | |
| CN104458161A (en) | Testing device and method for normally-open solenoid valve for auxiliary braking | |
| CN204479253U (en) | Bearing gas leakage checkout equipment | |
| CN111828699A (en) | Squirrel-cage flow regulating valve with regulating window | |
| CN106989185A (en) | A kind of novel rotating wheel formula manual throttle valve | |
| CN204479247U (en) | The bearing frock of bearing gas leakage checkout equipment | |
| CN108626403A (en) | A kind of twin-stage phase transformation labyrinth seal structure | |
| CN109459190A (en) | A kind of valve detection equipment | |
| CN210322197U (en) | Breather valve pressure seal nature detection device | |
| CN205446882U (en) | Gas accuse shuttle valve | |
| CN204459240U (en) | A kind of instrument root valve | |
| CN204085808U (en) | A kind of air-tightness detection device | |
| JPS62177367A (en) | Magnetic fluid shaft seal device for liquid | |
| JP2019086327A (en) | Method and apparatus for inspecting leakage of valve gear | |
| JP2004117355A (en) | Airtightness inspecting method for container and its device | |
| JP5733265B2 (en) | Gas filling device, gas tank inspection device, and gas tank inspection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |