CN207161714U - A kind of compact ultrahigh speed refractory machinery seals device - Google Patents
A kind of compact ultrahigh speed refractory machinery seals device Download PDFInfo
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- CN207161714U CN207161714U CN201721075856.0U CN201721075856U CN207161714U CN 207161714 U CN207161714 U CN 207161714U CN 201721075856 U CN201721075856 U CN 201721075856U CN 207161714 U CN207161714 U CN 207161714U
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- ring
- stationary
- spring
- stationary ring
- ultrahigh speed
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Abstract
The utility model is specifically related to a kind of compact ultrahigh speed refractory machinery seals device.Including rotating ring, static components, stationary ring housing and O-ring；Belt stress release groove is provided with ring seal end face, O-ring is located in rotating ring groove；Static components include end face block assembly, anti-rotation pin, spring and damping tape；End face block assembly includes stationary ring, stationary seat, capsule stack and the rear ring set gradually；Stationary ring is connected with stationary seat；Capsule stack one end is connected with stationary seat, and the other end is connected with rear ring, and rear ring is fixedly connected with stationary ring housing；Anti-rotation pin one end is fixedly connected with the pin hole of ring housing bottom, and the other end passes through the anti-rotating hole of stationary seat；Spring one end is located in the spring eye of stationary ring housing bottom, and the other end contacts with stationary seat；Damping tape is provided between capsule stack and stationary ring housing.The utility model realizes multiple startup, long-life, low friction, zero leakage work of the mechanical seal under high temperature and high pressure power operating mode.
Description
Technical field
It the utility model is related to technical field of sealing technology, and in particular to a kind of compact ultrahigh speed refractory machinery seals dress
Put.
Background technology
Engine is connected by frame with rocket body load-carrying construction in the prior art, and in-flight engine is not only that rocket carries
Arch thrust, also sway in both directions can be driven to provide pitching driftage controling power for rocket by servo-drive system.Due to providing pushing away for thrust
Entering agent has saturated vapor pressure height, easily Strong oxdiative, the characteristic such as vaporization, cooling and lubricating poor performance, generally in liquid-propellant rocket engine
A set of mechanical seal is set between propellant pump and turbine in turbine pump, it is isolation propellant and high-temperature fuel gas that it, which is acted on,.But
It is that high-temperature fuel gas (650 DEG C~750 DEG C of temperature) is applied directly at sealing, causes the vaporization of seal clearance medium, sealing deformation, from
And make oxidation pump seal leak, cause turbine chamber occur afterburning the problems such as.In addition, existing machinery sealing uses rubber seal
Structure, such a structure high temperature and high pressure power work under mechanical seal easily there is leakage problem, it is impossible to adapt to the high rotating speed of turbine pump,
High pressure, vibrate the working condition requirements such as big, multiple startup and long-time, it is impossible to ensure the reliability of high sealing.
Utility model content
Easily leaked to solve existing mechanical seal, it is impossible to it is big, more to adapt to the high rotating speed of turbine pump, high pressure, vibration
Secondary startup and the working condition requirement such as a long time, it is impossible to which the problem of ensuring the reliability of high sealing, the utility model provide a kind of tight
Gather type ultrahigh speed refractory machinery seals device.
The technical solution of the utility model is：
A kind of compact ultrahigh speed refractory machinery seals device, including rotating ring, static components, stationary ring housing and O-ring；
Belt stress release groove is provided with the seal face of the rotating ring, the inner side that rotating ring contacts with rotor is provided with annular groove, institute
O-ring is stated to be located in annular groove；The static components are arranged on the inside of stationary ring housing；Static components include end face block group
Part, anti-rotation pin, multiple springs and damping tape；End face block assembly includes stationary ring, stationary seat, the film set gradually along rotor axial
Case assembly and rear ring；The stationary ring is connected with stationary seat；Capsule stack be mainly sequentially overlapped by multi-disc diaphragm I and diaphragm II and
Into the inward flange with two neighboring diaphragm II, outward flange are sequentially connected respectively for the inward flange of diaphragm I, outward flange；Capsule stack one
End is connected with stationary seat, and the other end is connected with rear ring, and rear ring is fixedly connected with stationary ring housing；Stationary ring housing bottom is uniformly provided with pin
Nail, anti-rotation pin one end are fixedly connected with pin hole, and the other end passes through the anti-rotating hole of stationary seat；Stationary ring housing bottom is uniformly set
There are multiple spring eyes, spring one end is located in spring eye；The other end contacts with stationary seat；The pin hole and spring eye are to rotor
The distance at center is identical；Damping tape is provided between capsule stack and stationary ring housing, damping tape is located at stationary ring shell inner surface
In annular groove.
Further, in addition to graphite pads, the graphite pads are arranged on the end face that stationary ring housing contacts with pump case.Stone
Ink pad can not only realize heat-insulated, the decrement of also adjustable shafting realization fine setting mechanical seal.
Further, the groove width of the belt stress release groove is the 10%~15% of rotating ring radial width, and groove depth is
The 15%~20% of ring axial width, belt stress release groove can effectively reduce rotating ring and assemble and caused change in the course of work
Shape, realize the function of reliably sealing.
Further, rear ring is fixedly connected by welding with stationary ring housing, is set on the end face of the remote stationary ring of stationary ring housing
It is equipped with welding stress release groove.The welding stress release groove can reduce the stress deformation after welding.
Further, the rotating ring uses molybdenum alloy, and stationary ring is Special high-temperature pyrolytic graphite, and diaphragm I and diaphragm II are thickness
Spend 0.1~0.15mm GH4169.
Further, in the groove that the stationary ring insertion stationary seat is set, it is connected with stationary seat interference.
Further, the damping tape has 8~15 elastic journal stirrups, and frictional force caused by holding is capsule stack and bullet
The 10%~15% of spring force.Damping tape is simple and reliable for structure, has in light weight, and size is small, easy processing, assembles and simple waits spy
Point.
Further, external diameter≤30mm of rotating ring, the quantity of spring is 6-10.
Further, the inward flange with two neighboring diaphragm II, outward flange be successively respectively for the inward flange of diaphragm I, outward flange
It is welded to connect.
Further, the face pressure of mechanically-sealing apparatus is adjusted by spring parameter and capsule stack parameter
, adjustment formula is：
Wherein：
Pc- face pressure；kb1- capsule stack rigidity；kb2- spring rate；Δ 1- capsule stack decrements；Δ 2- spring pressures
Contracting amount；N- number of springs；A- friction pair contacts area；K- face loading coefficients；λ-medium back pressure factor；Δ P- medium differential pressures.
Formula is adjusted by face pressure, in the case where not changing mechanically-sealing apparatus size, different face pressures can be reached
Value, suitable for a variety of operating modes, shortens the process-cycle of mechanical seal product, has saved cost.
The advantages of the utility model is：
1. the utility model uses capsule stack and the box-like rotatory sealing of groups of springs：Rubber seal is substituted using capsule stack
Coil structures, and be combined with spring, static components elastic force is provided jointly by capsule stack and spring, improves sealing device
High temperature resistant and high pressure ability, it is compact-sized, sealing space is saved, the mechanical seal overcome under the work of high temperature and high pressure power is easy
The shortcomings that leaking, realize multiple startup of the mechanical seal under high temperature and high pressure power operating mode, long-life, low friction, zero
Leak work.
2. the utility model capsule stack by increasing damping tape, can effectively reduce capsule stack Oscillation Amplitude, make film
Case assembly fatigue life increases considerably；Damping tape is simple and reliable for structure, has in light weight, and size is small, easy processing, and assembling is simple
The features such as.
3. graphite pads provided by the utility model are between stationary ring housing and pump case, graphite pads can not only realize every
Heat, also adjustable shafting realize the decrement of fine setting mechanical seal.
4. the utility model adjusts formula, in the case where not changing mechanically-sealing apparatus size, energy by face pressure
Enough reach different face pressure values, suitable for a variety of operating modes, shorten the process-cycle of mechanical seal product, save
Cost.
5. the utility model sealing device realizes two way seal, static components elasticity is provided by capsule stack and spring
Power, meets and is more than medium pressure liquid in engine startup gaseous-pressure, and combustion gas can not largely seal in pump chamber, stable work
Make stage liquid pressure medium and be higher than gaseous-pressure, liquid medium can not largely leak to the requirement of the sealing of turbine chamber.
Brief description of the drawings
Fig. 1 is the utility model embodiment structural representation；
Fig. 2 is the utility model embodiment movable ring structure figure；
Fig. 3 is the utility model embodiment end face block assembly installation diagram；
Fig. 4 is the utility model embodiment capsule stack installation diagram；
Fig. 5 is the utility model embodiment damping tape structure chart.
Reference：1- stationary seats, 2- stationary rings, 3- springs, 4- stationary ring housings, 5- diaphragms I, 6- diaphragms II, ring after 7-, 8-
Damping tape, 9- anti-rotation pins, 10- rotating rings, 11-O type circles, 12- graphite pads, 13- clamp nuts, 14- rotors, 15- belt stresses
Release groove, 16- welding stress release grooves.
Embodiment
Content of the present utility model is described in further detail below in conjunction with the drawings and specific embodiments：
Compact ultrahigh speed refractory machinery seals device provided by the utility model is mainly used in liquid rocket and started
Between propellant pump and turbine in machine turbine pump, for isolating propellant and high-temperature fuel gas, belong to liquid-propellant rocket engine whirlpool
Take turns Sealing used for pump.The utility model can also be used for the field such as ship, nuclear industry sealing device, and must assure that sealing,
In dimensional space and narrow and small rotating device.The utility model can adapt to multiple startup, variable working condition, long-life and high parameter
Deng requirement.
As shown in Fig. 1 to 5, mechanically-sealing apparatus provided by the utility model is contacting mechanical seal, main to include moving
Ring 10, static components, stationary ring housing 4, O-ring 11 and graphite pads 12, static components are arranged on the inside of stationary ring housing 4；
Rotating ring 10 uses monolithic construction, external diameter≤30mm, and belt stress release groove is provided with the seal face of rotating ring 10
15, groove width is the 10%~15% of rotating ring radial width, and groove depth is the 15%~20% of rotating ring axial width, and the annular groove can be effective
The caused deformation in assembling and the course of work of rotating ring 10 is reduced, realizes the function of reliably sealing.O-ring 11 is arranged at rotating ring 10
In the annular groove of inner side, held tightly with rotor 14, axial seal is carried out to rotating ring 10 and rotor 14.
Static components include end face block assembly, anti-rotation pin 9, spring 3 and damping tape 8.End face block assembly is included along rotor
Stationary ring 2, stationary seat 1, capsule stack and the rear ring 7 axially set gradually；The side setting of stationary seat 1 is fluted, and stationary ring 2 is embedded in
In the groove of stationary seat 1, and it is connected with the interference of stationary seat 1；Stationary ring 2 is in contact close to medium progress with the sealing surface of rotating ring 10
Envelope；Capsule stack is mainly sequentially overlapped and formed by multi-disc diaphragm I 5 and diaphragm II 6, the inward flange of diaphragm I, outward flange respectively with phase
The inward flange of adjacent two diaphragms II, outward flange are welded to connect successively；Capsule stack one end is connected with stationary seat 1, and the other end is with after
Ring 7 is connected, and rear ring 7 is fixedly connected by welding with stationary ring housing 4, and the weld of stationary ring housing 4 is set on the end face away from stationary ring
Welding stress release groove 16 is equipped with, the welding stress release groove 16 can reduce the stress deformation after welding.
Anti-rotation pin 9 is arranged at the bottom of stationary ring housing 4, stationary ring 2 is carried out circumferential spacing；The bottom of stationary ring housing 4 uniform two
Individual pin hole, the one end of anti-rotation pin 9 are connected with pin hole, and the other end passes through the anti-rotating hole of stationary seat 1；Spring 3 is uniformly arranged
In the bottom spring eye of stationary ring housing 4, the one end of spring 3 is arranged in spring eye, and the other end contacts with stationary seat 1, the quantity of spring 3
For 6-10；The distance at pin hole and spring eye to the center of rotor 14 is identical, and such a setting can prevent end face block assembly stress not
, there is clamping stagnation problem.
Damping tape 8 is provided between capsule stack and stationary ring housing 4, damping tape 8 is arranged at the ring of the inner surface of stationary ring housing 4
In shape groove, damping tape 8 has 8-15 elastic journal stirrups, and damping tape 8 is held tightly to end face block assembly ring, has ring to end face block assembly
To enclasping force, it is that capsule stack and spring 3 produce the 10%~15% of elastic force that damping tape 8, which holds caused frictional force tightly,.
Graphite pads 12 are between stationary ring housing 4 and pump case；Graphite pads 12 can not only be realized heat-insulated, go back adjustable axle
System, realize the purpose of the decrement of fine setting mechanical seal.
The metal parts of mechanically-sealing apparatus, the material of non-metal workpiece are and N2O4One-level is compatible；Wherein, rotating ring 10 is
Molybdenum alloy, stationary ring 2 are Special high-temperature pyrolytic graphite, and diaphragm I 5, the GH4169 that diaphragm II 6 is 0.1~0.15mm of thickness, other are golden
Category material is generally 9Cr18,3Cr13,3J21, and graphite pads 12 use soft graphite, and O-ring 11 uses F207.
Static components use capsule stack and the box-like structure of groups of springs, and spring mainly provides seal face than pressure, bellows group
Part plays auxiliary seal, and decrement is small in the capsule stack course of work, about 0.5~1.0mm；Due to capsule stack and spring
Different functions is undertaken respectively, reduces the requirement to capsule stack performance, is advantageous to improve the reliability of sealing, is realized machine
Tool is sealed in multiple startup, long-life, low friction, zero leakage work under high temperature and high pressure power operating mode；Static components are being assembled
During with working condition, capsule stack and spring stress provide elasticity than pressing, and it is 0.51~0.6 to choose sealing stress load coefficient,
The liquid dinitrogen tetroxide medium filled around static components provides seal operation positive medium than pressure.
The face pressure of mechanically-sealing apparatus is adjusted by spring parameter and capsule stack parameter, works as assembly space
In the case that position is constant, 6~10 groups of diaphragms I 5, diaphragm II 6 are chosen, changes the rigidity k of capsule stackb1, added deduct by increasing
Few number of springs n, changes the adjustment that the total power of spring realizes face pressure, and specific adjustment is as follows：
In formula：Pc- face pressure；kb1- capsule stack rigidity；kb2The rigidity of-spring 3；Δ 1- capsule stack decrements；Δ2-
The decrement of spring 3；The quantity of n- springs 3；A- friction pair contacts area；K- face loading coefficients；λ-medium back pressure factor；Δ P- is situated between
Matter pressure difference.
Formula is adjusted by face pressure, in the case where not changing mechanically-sealing apparatus size, can be reached different
Face pressure value, suitable for a variety of operating modes, the process-cycle of mechanical seal product is shortened, has saved cost.
Compact ultrahigh speed refractory machinery seals device provided by the utility model, meets under following technical conditions：It is close
Seal pressure medium：0.8~1.5MPa；Sealing medium：Propellant medium/combustion gas；Running speed：60000±3000r/min；Temperature
Degree：15~30 DEG C of side medium, 650~750 DEG C of combustion gas side；Friction pair linear velocity >=75m/s；
The utility model sealing device realizes two way seal, and static components elastic force is provided by capsule stack and spring,
Meet and be more than medium pressure liquid in engine startup gaseous-pressure, combustion gas can not largely seal in pump chamber, steady operation
Stage liquid pressure medium is higher than gaseous-pressure, and liquid medium can not largely leak to the requirement of the sealing of turbine chamber.
In installation process, rotating ring 10, static components, O-ring 11, graphite pads 12 are formed into loading rotor 14 in order
On, pretension is carried out to whole mechanical seal by clamp nut 13.
Utility model works principle is：The mechanical seal at work, is full of medium, rotating ring 10, O-ring in annular seal space
11 circumferentially rotate with rotor 14, and graphite pads 12, stationary ring housing 4 are fixed, and capsule stack, spring 3, end face block assembly are along rotor
14 axially coordinate movement.Make rotating ring 10 in the pretightning force collective effect (i.e. face pressure) of pressure medium, spring 3 and capsule stack
It is brought into close contact with the graphite of stationary ring 2, the automatic fretting wear for compensating graphite.Under face pressure effect, stationary ring 2 is set to be protected with rotating ring 10
Good fitting is held, ensures the normal work of mechanical seal.
Sealing device provided by the utility model realizes the sealing to engine turbine pump propellant medium, apparatus structure
It is compact, occupy that axial space is small, good seal performance.The sealing device is turbine pump primary seal, ensures that medium is working and slided
Stage does not occur largely to leak, and the utility model mainly provides using capsule stack and the fabricated structure of spring 3, spring 3
Seal face plays auxiliary seal than pressure, capsule stack, and capsule stack and spring 3 undertake different functions respectively, reduces
Requirement to capsule stack performance, be advantageous to improve the reliability of sealing.
The scope of protection of the utility model is not limited to specific embodiment of the present utility model, for the skill of the art
For art personnel, under enlightenment of the present utility model, directly can exporting association from the utility model disclosure, some are former
Reason and structure identical basic deformation, or the replacement of known technology is commonly used in the prior art, and feature identical is mutually different
Combination, the technical characteristic of same or similar technique effect simply change, and belong to the protection domain of the utility model technology.
Claims (10)
- A kind of 1. compact ultrahigh speed refractory machinery seals device, it is characterised in that：Including rotating ring, static components, stationary ring shell Body and O-ring；Belt stress release groove is provided with the seal face of the rotating ring, it is recessed that the inner side that rotating ring contacts with rotor is provided with annular Groove, the O-ring are located in annular groove；The static components are arranged on the inside of stationary ring housing；Static components include end face block assembly, anti-rotation pin, multiple springs And damping tape；End face block assembly includes stationary ring, stationary seat, capsule stack and the rear ring set gradually along rotor axial；The stationary ring with it is quiet Ring seat connects；Capsule stack is mainly sequentially overlapped and formed by multi-disc diaphragm I and diaphragm II, the inward flange of diaphragm I, outward flange difference Inward flange, outward flange with two neighboring diaphragm II are sequentially connected；Capsule stack one end is connected with stationary seat, the other end and rear ring Connection, rear ring are fixedly connected with stationary ring housing；Stationary ring housing bottom is uniformly provided with pin hole, and anti-rotation pin one end is fixedly connected with pin hole, and the other end passes through stationary seat Anti-rotating hole；Stationary ring housing bottom is uniformly provided with multiple spring eyes, and spring one end is located in spring eye；The other end contacts with stationary seat；Institute The distance for stating pin hole and spring eye to rotor center is identical；Damping tape is provided between capsule stack and stationary ring housing, damping tape is located in the annular groove of stationary ring shell inner surface.
- 2. compact ultrahigh speed refractory machinery seals device according to claim 1, it is characterised in that：Also include graphite Pad, the graphite pads are arranged on the end face that stationary ring housing contacts with pump case.
- 3. compact ultrahigh speed refractory machinery seals device according to claim 1, it is characterised in that：The annular should The groove width of power release groove is the 10%~15% of rotating ring radial width, and groove depth is the 15%~20% of rotating ring axial width.
- 4. the compact ultrahigh speed refractory machinery seals device according to claim 1 or 2 or 3, it is characterised in that：Ring afterwards It is fixedly connected by welding with stationary ring housing, welding stress release groove is provided with the end face of the remote stationary ring of stationary ring housing.
- 5. compact ultrahigh speed refractory machinery seals device according to claim 4, it is characterised in that：The rotating ring is adopted With molybdenum alloy, stationary ring is Special high-temperature pyrolytic graphite, diaphragm I and the GH4169 that diaphragm II is 0.1~0.15mm of thickness.
- 6. compact ultrahigh speed refractory machinery seals device according to claim 5, it is characterised in that：The stationary ring is embedding In the groove for entering stationary seat setting, it is connected with stationary seat interference.
- 7. compact ultrahigh speed refractory machinery seals device according to claim 6, it is characterised in that：The damping tape With 8~15 elastic journal stirrups, frictional force caused by holding is the 10%~15% of capsule stack and spring force.
- 8. compact ultrahigh speed refractory machinery seals device according to claim 7, it is characterised in that：The external diameter of rotating ring ≤ 30mm, the quantity of spring is 6-10.
- 9. compact ultrahigh speed refractory machinery seals device according to claim 8, it is characterised in that：Diaphragm I it is interior The inward flange with two neighboring diaphragm II, outward flange are welded to connect successively respectively for edge, outward flange.
- 10. compact ultrahigh speed refractory machinery seals device according to claim 9, it is characterised in that：Mechanical seal The face pressure of device is adjusted by spring parameter and capsule stack parameter, and adjustment formula is：<mrow> <msub> <mi>P</mi> <mi>c</mi> </msub> <mo>=</mo> <mfrac> <mrow> <msub> <mi>k</mi> <mrow> <mi>b</mi> <mn>1</mn> </mrow> </msub> <mi>&Delta;</mi> <mn>1</mn> <mo>+</mo> <msub> <mi>nk</mi> <mrow> <mi>b</mi> <mn>2</mn> </mrow> </msub> <mi>&Delta;</mi> <mn>2</mn> </mrow> <mi>A</mi> </mfrac> <mo>+</mo> <mrow> <mo>(</mo> <mi>k</mi> <mo>-</mo> <mi>&lambda;</mi> <mo>)</mo> </mrow> <mi>&Delta;</mi> <mi>P</mi> </mrow>Wherein：Pc- face pressure；kb1- capsule stack rigidity；kb2- spring rate；Δ 1- capsule stack decrements；Δ 2- spring-compresseds Amount；N- number of springs；A- friction pair contacts area；K- face loading coefficients；λ-medium back pressure factor；Δ P- medium differential pressures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721075856.0U CN207161714U (en) | 2017-08-25 | 2017-08-25 | A kind of compact ultrahigh speed refractory machinery seals device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721075856.0U CN207161714U (en) | 2017-08-25 | 2017-08-25 | A kind of compact ultrahigh speed refractory machinery seals device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207161714U true CN207161714U (en) | 2018-03-30 |
Family
ID=61719213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721075856.0U Withdrawn - After Issue CN207161714U (en) | 2017-08-25 | 2017-08-25 | A kind of compact ultrahigh speed refractory machinery seals device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207161714U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253260A (en) * | 2018-11-30 | 2019-01-22 | 哈尔滨广瀚动力技术发展有限公司 | A kind of oil sealing arrangement of the gas turbine with flag-shaped slot rotating ring |
| CN113669451A (en) * | 2021-08-31 | 2021-11-19 | 湖北三江航天红林探控有限公司 | Sealing structure and application thereof in high-temperature and high-pressure system |
-
2017
- 2017-08-25 CN CN201721075856.0U patent/CN207161714U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253260A (en) * | 2018-11-30 | 2019-01-22 | 哈尔滨广瀚动力技术发展有限公司 | A kind of oil sealing arrangement of the gas turbine with flag-shaped slot rotating ring |
| CN113669451A (en) * | 2021-08-31 | 2021-11-19 | 湖北三江航天红林探控有限公司 | Sealing structure and application thereof in high-temperature and high-pressure system |
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Granted publication date: 20180330 Effective date of abandoning: 20230530 |