CN207648184U - A kind of double eccentric part spherical shell structures of the thin-walled with stiff shaft - Google Patents
A kind of double eccentric part spherical shell structures of the thin-walled with stiff shaft Download PDFInfo
- Publication number
- CN207648184U CN207648184U CN201721606191.1U CN201721606191U CN207648184U CN 207648184 U CN207648184 U CN 207648184U CN 201721606191 U CN201721606191 U CN 201721606191U CN 207648184 U CN207648184 U CN 207648184U
- Authority
- CN
- China
- Prior art keywords
- spherical shell
- stiff shaft
- thin
- structure according
- arc
- 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
Abstract
A kind of double eccentric part spherical shell structures of the thin-walled with stiff shaft, including thin spherical shell (1), stiff shaft (2)；The thin spherical shell (1) is the spherical part that ball valve closed state realizes sealing function, the upper and lower end face of spherical part is sector, stiff shaft is penetrated between upper and lower two sectors, and be connected between stiff shaft and upper and lower sector, relatively radially and to axial there is eccentricity in the centre of gyration of stiff shaft and the geometric center of spherical part；Spherical shell structure unitary rotation is driven by external drive mechanism.
Description
Technical field
The utility model is related to a kind of double eccentric part bulb separations of the band stiff shaft thin-walled suitable for liquid-propellant rocket engine ball valve
Shell structure.
Background technology
Extensively using switch of the ball valve as Propellant Supply in liquid-propellant rocket engine, ball valve is small with flow resistance, not by
The characteristics of operating pressure and circulation size limitation.
It is first to be passed through control to avoid valve seat and ball wear in ball valve action process, traditional engine ball valve design method
Gas makes ball detach with valve seat to be rotated further by sphere to avoid wearing, the single switch motion of ball valve is decomposed into lift seat-opening
The combinative movement that (closing)-takes a seat, ball valve itself must increase lift seat mechanism, and engine also must mating related lift seat gas control and automatically controlled
System makes engine system and ball valve self structure complicate, increases engine weight, reduces engine reliability.And it is traditional
The whole spherical structure of ball valve has more highlighted the big disadvantage of its weight on big orifice valve.To mitigate ball valve weight, simplification is started
Machine and ball-valve structure, need to design a kind of not only simple in structure light-weight, but also valve seat in ball valve action process can be realized from separation
Sphere structure.
Utility model content
The technology of the utility model solves the problems, such as：It has overcome the deficiencies of the prior art and provide a kind of with the thin of stiff shaft
The double eccentric part spherical shell structures of wall.
The technical solution of the utility model is：A kind of double eccentric part spherical shell structures of the thin-walled with stiff shaft, including
Thin spherical shell, stiff shaft；The thin spherical shell is the spherical part that ball valve closed state realizes sealing function, spherical portion
The upper and lower end face divided is sector, stiff shaft is penetrated between upper and lower two sectors, and solid between stiff shaft and upper and lower sector
Even, relatively radially and to axial there is eccentricity in the centre of gyration of stiff shaft and the geometric center of spherical part；Pass through
External drive mechanism drives spherical shell structure unitary rotation.
Further, it is connected respectively by upper spline and lower spline between stiff shaft and upper and lower sector.
Further, external drive motor structure is keyed by the upper connection on upper spline.
Further, external drive motor structure is keyed by the lower connection on lower spline.
Further, the outer diameter ratio 1/40~1/50 of the wall thickness of the thin spherical shell and thin spherical shell, wherein thin-walled
The outer diameter of spherical shell>250mm.
Further, relatively radially eccentricity E and to axial eccentric distance e within the scope of first 10 ° that spherical shell structure rotates,
Realize that spherical shell is automatically disengaged with valve seat.
Further, for the outer diameter of thin spherical shell in 250~500mm, relatively radially eccentricity E takes 5~8mm, relative axle
1~2mm is taken to eccentric distance e.
Further, the stiff shaft is in the streamlined design in flow of media direction.
Further, cross sectional shape of the stiff shaft in flow of media direction：Both sides are arc A and arc B, arc A and arc B
Between seamlessly transitted by streamline；Wherein the radius of arc A is more than the radius of arc B.
The utility model has the beneficial effect that compared with prior art：
(1) compare existing lift seat globe valve, without lifting seat mechanism, only by between shaft and the centre of sphere it is double it is eccentric realize valve seats with
Ball is automatically separated, and reduces the abrasion of the valve seat and spherical shell of rotation abrasion, simplifies valve mechanism and engine system composition.
(2) part spherical shell thin-wall construction is used, the about 1/4 spherical shell portion that ball valve closed state realizes sealing function is only retained
Point, effectively reduce big orifice ball valve weight.
(3) stiff shaft is used to eliminate the torsional deflection of thin spherical shell in rotation process.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model,
Fig. 2 is the structure axial sectional diagrammatical view illustration of the utility model
Fig. 3 is the principles of the present invention schematic diagram；
In figure：1. thin spherical shell；2. stiff shaft；3. upper spline；Connecting key on 4.；5. lower spline；6. lower connecting key；7.
Valve seat；E. radial disbalance away from；E. it is axially eccentric away from.
Specific implementation mode
Below in conjunction with the accompanying drawings and example elaborates to the utility model.
As shown in Figure 1, a kind of double eccentric thin spherical shell structures with stiff shaft of the utility model, body contours are 1/4
Divide thin spherical shell 1, applied to sphere diameter>The big orifice spherical shell of ball valve thickness of 250mm is 1/40~1/50 with outer diameter ratio, this sets
Meter advantage is that spherical shell is circumferential under conditions of proof strength and radial dimension reduces as far as possible, realizes sphere lightweight, above,
Lower face is that sector is connected with thin spherical shell 1, provides radial support for spherical shell in upper and lower end, rigidity is penetrated between upper and lower end face
Axis 2 is connect by upper spline 3, lower spline 5 with spherical shell 1, to realize the unitary rotation of thin spherical shell, can eliminate one end drive
Spherical shell torsional deflection, upper spline 3 and lower 5 synchronous processing of spline caused by dynamic, to ensure that stiff shaft 2 can be inserted into from one end, rigidity
In flow of media direction, streamlined design reduces flow resistance to axis 2, as shown in Fig. 2, both sides are arc A and arc B, between arc A and arc B
It is seamlessly transitted by streamline；Wherein the radius of arc A is more than the radius of arc B.Upper connecting key 4 or lower connecting key 6 connect driving mechanism
To drive ball to rotate.
As shown in figure 3, the centre of gyration of shaft is in the presence of relatively radially eccentricity E and inclined to axial with spherical shell geometric center
The heart is realized within the scope of first 10 ° that ball rotates by distributing two eccentricity numerical value rationally away from e, realizes that spherical shell 1 is automatic with valve seat 7
It is detached from, reduces the friction with valve seat, 1 edge designs fillet of spherical shell in spherical shell rotation process and smoothly transit, avoid in closing process
Cut valve seat 7.When sphere diameter is in 250~500mm, radial disbalance takes 5~8mm away from E, axially eccentric to take 1~2mm away from e.
The utility model unspecified part belongs to common sense well known to those skilled in the art.
Claims (9)
1. a kind of double eccentric part spherical shell structures of thin-walled with stiff shaft, it is characterised in that：Including thin spherical shell (1), stiff shaft
(2)；The thin spherical shell (1) be ball valve closed state realize sealing function spherical part, spherical part up and down
End face is sector, stiff shaft is penetrated between upper and lower two sectors, and be connected between stiff shaft and upper and lower sector, stiff shaft
The geometric center of the centre of gyration and spherical part relatively radially and to axial there is eccentricity；Pass through external drive motor
Structure drives spherical shell structure unitary rotation.
2. structure according to claim 1, it is characterised in that：Respectively by upper between stiff shaft (2) and upper and lower sector
Spline (3) and lower spline (5) connection.
3. structure according to claim 2, it is characterised in that：Connected by the upper connecting key (4) being mounted on upper spline (3)
Meet external drive mechanism.
4. structure according to claim 2, it is characterised in that：Connected by the lower connecting key (6) being mounted on lower spline (5)
Meet external drive mechanism.
5. structure according to claim 1, it is characterised in that：The wall thickness of the thin spherical shell (1) and thin spherical shell
Outer diameter ratio 1/40~1/50, the wherein outer diameter of thin spherical shell>250mm.
6. structure according to claim 1, it is characterised in that：Relatively radially eccentricity E and to axial eccentric distance e in ball
Within the scope of first 10 ° of shell structure rotation, realize that spherical shell (1) is automatically disengaged with valve seat (7).
7. structure according to claim 6, it is characterised in that：The outer diameter of thin spherical shell is in 250~500mm, opposite diameter
5~8mm is taken to eccentricity E, eccentric distance e takes 1~2mm to axial.
8. structure according to claim 1, it is characterised in that：The stiff shaft (2) is in streamline in flow of media direction
Type designs.
9. structure according to claim 8, it is characterised in that：Section of the stiff shaft (2) in flow of media direction
Shape：Both sides are arc A and arc B, are seamlessly transitted by streamline between arc A and arc B；Wherein the radius of arc A is more than the radius of arc B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721606191.1U CN207648184U (en) | 2017-11-27 | 2017-11-27 | A kind of double eccentric part spherical shell structures of the thin-walled with stiff shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721606191.1U CN207648184U (en) | 2017-11-27 | 2017-11-27 | A kind of double eccentric part spherical shell structures of the thin-walled with stiff shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207648184U true CN207648184U (en) | 2018-07-24 |
Family
ID=62882065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721606191.1U Active CN207648184U (en) | 2017-11-27 | 2017-11-27 | A kind of double eccentric part spherical shell structures of the thin-walled with stiff shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207648184U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940011A (en) * | 2017-11-27 | 2018-04-20 | 北京航天动力研究所 | A kind of double eccentric part spherical shell structures of thin-walled with stiff shaft |
-
2017
- 2017-11-27 CN CN201721606191.1U patent/CN207648184U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940011A (en) * | 2017-11-27 | 2018-04-20 | 北京航天动力研究所 | A kind of double eccentric part spherical shell structures of thin-walled with stiff shaft |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106932169B (en) | A kind of revolution is ventilated the air-breather tested into water | |
| CN100348458C (en) | Fish shape simulating nacelle propeller | |
| CN207648184U (en) | A kind of double eccentric part spherical shell structures of the thin-walled with stiff shaft | |
| CN110118058A (en) | Petal type rotary steering drilling tool | |
| CN104759325B (en) | A kind of ectonexine forces axially flowing and the ball mill device for circulating up and down | |
| CN102556321A (en) | Floating type spherical rotating vane steering engine | |
| CN102501960A (en) | Transmission device of nozzle rudder | |
| CN104295764B (en) | Forced sealing ball valve | |
| CN106809367A (en) | A kind of unmanned ocean robot steering gear | |
| CN107940011A (en) | A kind of double eccentric part spherical shell structures of thin-walled with stiff shaft | |
| CN104024604A (en) | Valve device for a motor vehicle | |
| CN209083854U (en) | A kind of non-maintaining Self-regulation core-tension type clutch release bearing of light weight | |
| CN201916572U (en) | Pneumatic and hydraulic cone valve for high-pressure water descaling | |
| CN104100486B (en) | A kind of axial piston electric-motor pump | |
| CN204293912U (en) | A kind of gas-liquid separator of aircraft liquid cooling system | |
| CN206031739U (en) | Modular novel tiller | |
| CN207729019U (en) | A kind of double pneumatic stopping valves | |
| CN202181949U (en) | Crank-arm-free piston type rotor power machine | |
| CN112124543B (en) | Ship propeller-rudder combined vortex-eliminating energy-saving device and installation method | |
| CN104925146B (en) | A kind of cab of heavy truck overturns integral electric hydraulic pump cylinder | |
| CN104499934B (en) | Non-excavation pipe-laying drilling rig unit head floating installation | |
| CN203600259U (en) | Universal robot joint driven by water pressure | |
| CN101865170A (en) | Follow-up rotary valve-type reversing valve and follow-up reversing mechanism and follow-up reserving method | |
| CN209054091U (en) | Differential balance block valve | |
| CN208997447U (en) | A kind of oil drain valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |