CN104913068A - High-low-temperature box penetrating shaft gas sealing device and application - Google Patents
High-low-temperature box penetrating shaft gas sealing device and application Download PDFInfo
- Publication number
- CN104913068A CN104913068A CN201510282742.2A CN201510282742A CN104913068A CN 104913068 A CN104913068 A CN 104913068A CN 201510282742 A CN201510282742 A CN 201510282742A CN 104913068 A CN104913068 A CN 104913068A
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- Prior art keywords
- gas
- transmission shaft
- low temperature
- temperature chamber
- gas tight
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/40—Sealings between relatively-moving surfaces by means of fluid
Abstract
The invention discloses a high-low-temperature box penetrating shaft gas sealing device and application, and particularly relates to a sealing device suitable for a space environment simulation box penetrating shaft of spaceflight ground simulation equipment. The gas sealing device comprises a transmission shaft, a gas sealing sleeve, a gasket, a gas sealing flange, a high-low-temperature box and gas supply equipment. The gas sealing sleeve, the gasket and the gas sealing flange are installed on the transmission shaft (1) in a sleeving mode. The transmission shaft penetrates through the high-low-temperature box and is connected with the equipment in the box, and the gas supply equipment is connected with an input hole of the gas sealing sleeve through a gas conveying pipe. The gas sealing device has the advantages of being simple in structure, and ensuring the dew point temperature in the high-low-temperature box and the cleanness, friction is avoided, and pollution to the environment box is avoided; meanwhile, the gas sealing device can be used for sealing a rotating shaft and an axial moving shaft, the rotating speed and the axial moving speed of the transmission shaft are not limited, and the gas sealing device can seal the transmission shaft of axial motion, and is suitable for gas sealing of various speed processes from the low speed to the high speed.
Description
Technical field
The present invention relates to a kind of high-low temperature chamber and wear case axle gas-tight sealing and application, particularly one is applicable to space flight ground-based simulation equipment space environment simulation box and wears case shaft seal.
Background technique
During humidity, the microgravity of the environment-high and low temperature environment case of ground simulator owing to will try one's best in simulation space of space equipment, especially space, driving component is without friction, high cleanliness environment etc.If adopt traditional Simmer ring or sealed by liquid wet goods mode, the dew point temperature of high-low temperature chamber inside cannot be ensured on the one hand; On the other hand, once wearing and tearing or leakage can destroy the cleanliness of high and low temperature environment case inside; Again on the one hand, the friction introduced because of transmission shaft makes test result distortion.
Therefore, adopt gas-tight sealing to become the first-selection of space flight ground-based simulation equipment seal arrangement, it can maintain the high-cleanness, high of environmental cabinet inside, low dew point temperature, and can not introduce friction.。But, still do not have in the prior art to be a kind ofly applicable to high-low temperature chamber in the ground simulator of space equipment and to wear the gas-tight sealing of case axle.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of high-low temperature chamber and wear case axle gas-tight sealing, the problem can not only solve sealing gasket and the friction of liquid oil seal, easily revealing, and owing to being non-contact, without frictional loss, the rotating accuracy not reducing transmission shaft, do not produce any pollution simultaneously, the high cleanliness of environment can be ensured.
For solving the problems of the technologies described above, the invention provides a kind of high-low temperature chamber and wear case axle gas-tight sealing, comprise transmission shaft 1, gas tight jacket 2, packing ring 3, air sealing flange 4, high-low temperature chamber 5 and air feed equipment 6, gas tight jacket 2, packing ring 3, air sealing flange 4 is sleeved on transmission shaft 1, transmission shaft 1 is through high-low temperature chamber 5 and equipment connection in case, air feed equipment 6 is connected with the input hole 22 of gas tight jacket 2 by pneumatic tube 61, it is characterized in that, gas tight jacket 2, packing ring 3 and air sealing flange 4 are sleeved on transmission shaft 1 along transmission shaft 1 axially-aligned, packing ring 3 is positioned in the middle of gas tight jacket 2 and air sealing flange 4, air sealing flange 4 is connected on gas tight jacket 2 by the bolt 41 in counter sink, by bolt 41, gas tight jacket 2, packing ring 3 and air sealing flange 4 form an entirety, a gap 25 is had between air sealing flange 4 one end and high-low temperature chamber 5, and the pressure at gap 25 place is greater than the pressure in high-low temperature chamber 5, there is the input hole 22 be disposed radially at the middle part of gas tight jacket 2, input hole 22 one end is connected with the pneumatic tube 61 of air feed equipment 6, the other end is connected with the transmission channel 23 of gas tight jacket 2 inside, transmission channel 23 distributes along the even circumferential of gas tight jacket 2, and be connected with delivery outlet 24, delivery outlet 24 outlet end is the inwall of gas tight jacket 2.
Further, described gas tight jacket 2, in ring, there is a projection disk one end be not connected with packing ring 3 along transmission shaft 1 radial direction, and projection disk is circumferentially evenly distributed with counter sink 21, and bolt is connected with the pedestal of transmission shaft 1 by counter sink 21.
Preferably, described transmission channel 23 is along the axial distribution of transmission shaft 1.
Preferably, described transmission channel 23, one end is shut in gas tight jacket inner, and the other end contacts with packing ring 3, and is sealed by bolt 41.
Preferably, described delivery outlet 24 is axially vertical with transmission shaft 1 surface; Inside is provided with copper sheathing nozzle 26.
Further, described delivery outlet 24, the axis of delivery outlet 24 and the axis of transmission channel 23 perpendicular, and each delivery outlet 24 is uniformly distributed along the radial direction of gas tight jacket 2.
Further, each delivery outlet of described delivery outlet 24 24 has one with the centrosymmetric delivery outlet 24 in the plane transmission shaft center of circle, place in the plane perpendicular to transmission shaft 1 at its place.
Preferably, the width of described packing ring 3 is not more than the width in the corresponding cross section of gas tight jacket 2; Bolt 41 on described air sealing flange 4, is circumferentially uniformly distributed, and quantity is more than 6.
Preferably, when the width of described packing ring 3 is less than the width in gas tight jacket 2 corresponding cross section, packing ring 3 outside diameter is equal with gas tight jacket 2 outer diameter, and the part that the inner side of gas tight jacket 2 does not contact with packing ring 3 is along the circumferential direction evenly distributed with counter sink.
Preferably, any high-low temperature chamber described wears the sealing of wearing case axle of case axle gas-tight sealing for space flight or space flight simulation device.
Preferably, what air feed equipment 6 was supplied is dustless dry gas.
Seal arrangement provided by the present invention, does not limit with the speed moved axially the rotating speed of transmission shaft.
Beneficial effect of the present invention:
Air seal set provided by the present invention, there is provided high pressure dustless dry gas by air feed equipment, the inlet opening being entered gas tight jacket by pneumatic tube is injected in transmission channel, sprays at the copper sheathing nozzle by delivery outlet, forms stable, the uniform air film of thickness between gas tight jacket and transmission shaft.Air pressure due to the dustless gas of drying exported is greater than the air pressure in high-low temperature chamber, thus avoid the spilling of the dustless gas of the drying in high-low temperature chamber, reach good sealing effect, and then meet the seal request wearing case axle in space flight and space flight ground simulator.In addition, air seal set provided by the present invention has that structure is simple, lightweight, not friction and the advantage such as can not to pollute.Meanwhile, the rotating speed of transmission shaft is not limited with the speed moved axially, not only can seal the transmission shaft with axial motion, also be applicable to the gas seal of each rate process from low speed to high speed.
Accompanying drawing explanation
Fig. 1 is the generalized section that in the embodiment of the present invention, high-low temperature chamber wears case axle gas-tight sealing;
(1, transmission shaft; 2, gas tight jacket; 3, packing ring; 4, air sealing flange; 5, high-low temperature chamber; 6, air feed equipment; 21, counter sink; 22, input hole; 23, transmission channel; 24, delivery outlet; 25, gap; 26, copper sheathing nozzle; 41, bolt; 61, pneumatic tube).
Fig. 2 is the partial schematic diagram that in the embodiment of the present invention, high-low temperature chamber wears case axle gas-tight sealing;
(3, packing ring; 4, air sealing flange; 21, counter sink; 22, input hole; 23, transmission channel; 24, delivery outlet; 26, copper sheathing nozzle).
Fig. 3 is the sectional perspective schematic diagram that in the embodiment of the present invention, high-low temperature chamber wears case axle gas-tight sealing.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing 1-3, the present invention will be further described, but the present invention is by the restriction of embodiment.
In describing the invention, it should be noted that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, "front", "rear", "left", "right", " top ", " end ", " interior ", the orientation of the instruction such as " outward " and " endways " or position relationship be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In describing the invention, it should be noted that, unless otherwise expressly provided and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be direct connection, can also be indirectly connected by intermediary, can be the connection of two components interior.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
In addition, in describing the invention, except as otherwise noted, the implication of " multiple ", " many groups ", " many " is two or more.
Being the concrete case that high-low temperature chamber provided by the invention wears case axle gas-tight sealing see Fig. 1, Fig. 1, is the generalized section of whole device.As can be seen from Figure 1, gas-tight sealing provided by the present invention, comprise transmission shaft 1, gas tight jacket 2, packing ring 3, air sealing flange 4, high-low temperature chamber 5 and air feed equipment 6, wherein, gas tight jacket 2 also has counter sink 21, input hole 22, transmission channel 23, delivery outlet 24, has copper sheathing nozzle 26 in delivery outlet 24; The outer circumference of air sealing flange 4 there is counter sink, bolt 41 is had in this counter sink, bolt 41 is fixedly connected with gas tight jacket 2 through packing ring 3, and make gas tight jacket 2, packing ring 3 and air sealing flange 4 connect into as a whole, the axis along transmission shaft 1 is sleeved on the outside of transmission shaft 1.Transmission shaft 1 is through high-low temperature chamber 5 and the equipment connection in case.A gap 25 is formed between high-low temperature chamber 5 and air sealing flange 4.Meanwhile, be also provided with an air feed equipment 6 in the outside of gas tight jacket 2, for stuffing box gland provides the gas of dustless drying.Dustless dry air is injected in gas tight jacket 2 by pneumatic tube 61 by air feed equipment 6.The pressure of the dustless dry gas that air feed equipment 6 provides is higher than the pressure of high-low temperature chamber 5 inside.
Gas tight jacket 2 is circular, has the disk of a radially projection, disk is along the circumferential direction uniformly distributed 6 counter sinks in the one end do not contacted with packing ring 3, and bolt is by being connected to gas tight jacket 2 on the pedestal of transmission shaft place device to counter sink.At the other end of gas tight jacket 2, be connected and fixed by the bolt 41 in counter sink on air sealing flange 4 with packing ring 3 and air sealing flange 4 successively.The width of its middle washer 3 can equal the width of gas tight jacket 2 without the end face annulus of outstanding disk, also can be less than this width.When being less than this width, the outside diameter of packing ring 3 is identical with the diameter of the corresponding outer wall of gas tight jacket 2 dependent cross-section, inwall side is not along the circumferential direction all distributed with counter sink by the part that packing ring 3 covers, and can be connected by bolt or other modes with air sealing flange 4.
The partial schematic diagram that a kind of high-low temperature chamber provided by the present invention wears case axle gas-tight sealing see Fig. 2, Fig. 2, the mainly enlarged view of gas transport associated components in gas tight jacket 2.As can be seen from Figure 2, the axis of input hole 22 and the axial vertical of gas tight jacket 2, the dustless gas fast direct of convenient and dry taps in gas tight jacket 2.The other end of input hole 22 is connected with the transmission channel 23 distributed along gas tight jacket 2 circumferencial direction.The axis of transmission channel 23 parallels with the axis of transmission shaft 1 and gas tight jacket 2.The length of transmission channel 23 is less than the length of gas tight jacket 2, and the one end to the outstanding disk of gas tight jacket 2 is shut, and the other end can be shut, also can with packing ring 3 close contact, prevent Leakage Gas to seal.The side being close to gas tight jacket 2 inwall of transmission channel 23 is provided with delivery outlet 24.The axial direction of delivery outlet 24 is vertical with the axial direction of transmission channel 23, and one end is connected with transmission channel 23, and the outer wall of the other end and transmission shaft 1 is separated by the air film of a 0.1mm.The inside of delivery outlet 24 is provided with the copper sheathing nozzle that an aperture is 0.2mm.Delivery outlet 24 arranges two along transmission channel 23 axial direction.Simultaneously, each delivery outlet 24 is in the cross section that place and transmission shaft 1 are axially vertical centered by the center of circle, transmission shaft 1 cross section, there is a corresponding delivery outlet 24 at Central Symmetry place, to ensure the equilibrium to transmission shaft 1 active force exporting gas, prevents transmission shaft 1 from occurring moving radially.
The sectional perspective schematic diagram that a kind of high-low temperature chamber provided in the embodiment of the present invention wears case axle gas-tight sealing see Fig. 3, Fig. 3.As can be seen from Figure 3, air sealing flange 4 is evenly distributed with 6 counter sinks (air sealing flange 4 is display, but the packing ring 3 corresponding with it shows, and what color was darker is packing ring 3) along the circumferential direction.The width of packing ring 3 is less than the width of gas tight jacket 2 end face, is not along the circumferential direction evenly distributed with 8 counter sinks, for being connected with air sealing flange by the part that packing ring 3 covers in gas tight jacket 2 end face.Meanwhile, the width of packing ring 3 covers transmission channel 23 open end, is sealed up open end.It can also be seen that from Fig. 3, be distributed with 2 delivery outlets 24 along on the axial direction straight line of transmission channel 23.Meanwhile, pneumatic tube 61 is being fixed with input hole 22 joint by screw.
This seal arrangement, after air feed equipment 6 produces dry dustless gas, is sent to input hole 22 injected gas big envelope 2 by pneumatic tube 61.After entering gas tight jacket 2, transmission channel 23 is entered into along input hole 22, after transmission channel 23, being sprayed onto transmission shaft 1 outer surface by the copper sheathing nozzle 26 of delivery outlet 24, to form thickness be the air film of 0.1mm, and dustless dry gas is evenly flowed out by the upper end (direction of Fig. 2 arrow indication) of gas tight jacket 2 and lower end.Owing to being greater than the pressure in high-low temperature chamber 5 at the pressure at gap 25 place, the dustless gas of the drying in high-low temperature chamber 5 cannot being overflowed, thus reach good sealing effect.
The rotating speed that the gas-tight sealing that the present embodiment provides does not limit transmission shaft and the speed moved axially, both can realize the sealing of the transmission shaft of axial motion, also goes for the sealing with middle transmission shaft from low speed to high speed.
Although the present invention with preferred embodiment openly as above; but it is also not used to limit the present invention, any person skilled in the art, without departing from the spirit and scope of the present invention; can do various change and modification, what therefore protection scope of the present invention should define with claims is as the criterion.
Claims (10)
1. a high-low temperature chamber wears case axle gas-tight sealing, it is characterized in that, comprise transmission shaft (1), gas tight jacket (2), packing ring (3), air sealing flange (4), high-low temperature chamber (5) and air feed equipment (6), gas tight jacket (2), packing ring (3), air sealing flange (4) is sleeved on transmission shaft (1), transmission shaft (1) is through high-low temperature chamber (5) and equipment connection in case, air feed equipment (6) is connected with the input hole (22) of gas tight jacket (2) by pneumatic tube (61), gas tight jacket (2), packing ring (3) and air sealing flange (4) are sleeved on transmission shaft (1) along transmission shaft (1) axially-aligned, packing ring (3) is positioned in the middle of gas tight jacket (2) and air sealing flange (4), air sealing flange (4) is connected on gas tight jacket (2) by the bolt (41) in counter sink, by bolt (41), gas tight jacket (2), packing ring (3) and air sealing flange (4) form an entirety, a gap (25) is had between air sealing flange (4) one end and high-low temperature chamber (5), and the pressure at gap (25) place is greater than the pressure in high-low temperature chamber (5), there is the input hole (22) be disposed radially at the middle part of gas tight jacket (2), input hole (22) one end is connected with the pneumatic tube (61) of air feed equipment (6), the other end is connected with the transmission channel (23) of gas tight jacket (2) inside, transmission channel (23) distributes along the even circumferential of gas tight jacket (2), and be connected with delivery outlet (24), delivery outlet (24) outlet end is the inwall of gas tight jacket (2).
2. a kind of high-low temperature chamber described in claim 1 wears case axle gas-tight sealing, it is characterized in that, described gas tight jacket (2), in ring, there is a projection disk one end be not connected with packing ring (3) along transmission shaft (1) radial direction, projection disk is circumferentially evenly distributed with counter sink (21), and bolt is connected with the pedestal of transmission shaft (1) by counter sink (21).
3. a kind of high-low temperature chamber described in claim 1 wears case axle gas-tight sealing, it is characterized in that, described transmission channel (23) is along the axial distribution of transmission shaft (1).
4. a kind of high-low temperature chamber described in claim 3 wears case axle gas-tight sealing, it is characterized in that, described transmission channel (23), one end is shut in gas tight jacket inner, the other end contacts with packing ring (3), and by bolt (41) sealing.
5. a kind of high-low temperature chamber described in claim 1 wears case axle gas-tight sealing, it is characterized in that, described delivery outlet (24), and axially vertical with transmission shaft (1) surface, inside is provided with copper sheathing nozzle (26).
6. a kind of high-low temperature chamber described in claim 5 wears case axle gas-tight sealing, it is characterized in that, described delivery outlet (24), the axis of delivery outlet (24) and the axis of transmission channel (23) perpendicular, and each delivery outlet (24) is uniformly distributed along the radial direction of gas tight jacket (2).
7. a kind of high-low temperature chamber described in claim 5 wears case axle gas-tight sealing, it is characterized in that, described delivery outlet (24), each delivery outlet (24) has one with the centrosymmetric delivery outlet in the plane transmission shaft center of circle, place (24) in the plane perpendicular to transmission shaft (1) at its place.
8. a kind of high-low temperature chamber described in claim 1 wears case axle gas-tight sealing, it is characterized in that, the width of described packing ring (3) is not more than the width in gas tight jacket (2) corresponding cross section; Bolt (41) on described air sealing flange (4), be circumferentially uniformly distributed, and quantity is more than 6.
9. a kind of high-low temperature chamber described in claim 8 wears case axle gas-tight sealing, it is characterized in that, when the width of described packing ring (3) is less than the width in gas tight jacket (2) corresponding cross section, packing ring (3) outside diameter is equal with gas tight jacket (2) outer diameter, and the part that the inner side of gas tight jacket (2) does not contact with packing ring (3) is along the circumferential direction evenly distributed with counter sink.
10. any high-low temperature chamber described in claim 1-9 wears case axle gas-tight sealing, it is characterized in that, for the sealing of wearing case axle of space flight or space flight simulation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282742.2A CN104913068B (en) | 2015-05-28 | 2015-05-28 | High-low-temperature box penetrating shaft gas sealing device and application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282742.2A CN104913068B (en) | 2015-05-28 | 2015-05-28 | High-low-temperature box penetrating shaft gas sealing device and application |
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| CN104913068A true CN104913068A (en) | 2015-09-16 |
| CN104913068B CN104913068B (en) | 2017-04-12 |
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| CN201510282742.2A Active CN104913068B (en) | 2015-05-28 | 2015-05-28 | High-low-temperature box penetrating shaft gas sealing device and application |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952905A (en) * | 2016-06-27 | 2016-09-21 | 九江精密测试技术研究所 | Thermostat rotating table shaft system seal design |
| CN107014745A (en) * | 2017-06-01 | 2017-08-04 | 北京强度环境研究所 | A kind of crossing cabin shaft seal for combined environment test |
| CN109869410A (en) * | 2019-04-13 | 2019-06-11 | 江西理工大学南昌校区 | Three rotary freedom high-low temperature chambers of one kind wear case axis ball-type gas-tight sealing |
| CN109973661A (en) * | 2019-04-13 | 2019-07-05 | 江西理工大学南昌校区 | A kind of four-degree-of-freedom high-low temperature chamber, which is vertically arranged, wears case axis gas-tight sealing |
| CN110005821A (en) * | 2019-04-13 | 2019-07-12 | 江西理工大学南昌校区 | A kind of horizontal four-degree-of-freedom of high-low temperature chamber wears case axis gas-tight sealing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105952905A (en) * | 2016-06-27 | 2016-09-21 | 九江精密测试技术研究所 | Thermostat rotating table shaft system seal design |
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| CN109869410A (en) * | 2019-04-13 | 2019-06-11 | 江西理工大学南昌校区 | Three rotary freedom high-low temperature chambers of one kind wear case axis ball-type gas-tight sealing |
| CN109973661A (en) * | 2019-04-13 | 2019-07-05 | 江西理工大学南昌校区 | A kind of four-degree-of-freedom high-low temperature chamber, which is vertically arranged, wears case axis gas-tight sealing |
| CN110005821A (en) * | 2019-04-13 | 2019-07-12 | 江西理工大学南昌校区 | A kind of horizontal four-degree-of-freedom of high-low temperature chamber wears case axis gas-tight sealing |
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| CN104913068B (en) | 2017-04-12 |
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