CN203098860U - Back-pressure-type floating seal device - Google Patents
Back-pressure-type floating seal device Download PDFInfo
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- CN203098860U CN203098860U CN 201220644944 CN201220644944U CN203098860U CN 203098860 U CN203098860 U CN 203098860U CN 201220644944 CN201220644944 CN 201220644944 CN 201220644944 U CN201220644944 U CN 201220644944U CN 203098860 U CN203098860 U CN 203098860U
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Abstract
The utility model relates to a back-pressure-type floating seal device, belonging to the technical field of dynamic seals. The device comprises an outer cavity, an inner cavity, a piston, a seal base, a special-shaped seal gasket, a combined seal ring and a middle shaft, wherein the combined seal ring consists of an annular framework and a seal ring. By using the structural characteristics of the formed seal device, in combination with the elasticity and the compressibility of the material of a sealing element, the seal device is enabled to obtain axially dynamic floating performance to achieve static and dynamic seal effects. The combined seal ring can bear repetitive impact of high-speed alternating load during working, the sealing element can still achieve a seal effect and the influence on the sealing performance due to errors produced during machining or assembling of parts can be reduced.
Description
Technical field
Model utility relates to a kind of dynamic sealing means of gas explosion sound source under water, belongs to the dynamic sealing technology field.
Background technique
The gas explosion sound source is a kind of transducing head that produces infrasonic sound, audio frequency physical field, is characterized in intermittently discharging bubble in water and produces pulsed sound.In other words be exactly the high-pressure air abrupt release that will store in the internal cavity in waters on every side, produce the seismic pulse ripple.Its working principle is: when the gas explosion sound source is excited, the bubble that moment discharges in water, its air pressure inside is far above external environment condition hydraulic pressure, this pressure reduction produces a vibration bubble in water, and by back and forth rapid expanding and compression, in this reciprocating process, gas ducks in drink the corresponding broadband of generation seismic pulse, and the waters gives off several hertz of broadband noises to several Kilohertzs towards periphery simultaneously.But the gas explosion sound source that produces both at home and abroad at present, particularly the gas explosion sound source of domestic production in use, occur time and again such as faults such as " connecting big gun ", " miso-fire ", " blow-by ", think by analysis, mainly be because assembly error unavoidably appears in Sealing in assembly process, and sealing configuration does not have the function that self adaption is regulated, thereby has the gap when Sealing is cooperated with sealing configuration, thus the fault more than the generation.
The model utility content
In view of this, the utility model provides a kind of back pressure type floating seal, the sealing device can even static seal has the characteristic that in axial direction moves within the specific limits, possess dynamic " floating " sealability with end face static sealing mobilism.
A kind of back pressure type floating seal comprises outer chamber, inner chamber body, piston, sealed base, special-shaped sealing gasket, combined seal ring and axis; Wherein, annular groove is radially arranged on the excircle of sealed base together, groove two-part diameter does not up and down wait, groove with the slightly larger in diameter of bottom in groove with top, the sealed base upper groove circumferentially has oblique through hole with the bottom, has the mounting groove of special-shaped sealing gasket on the end face of groove with top; Combined seal ring is made up of ring skeleton and seal ring, and ring set is on the circumference of ring skeleton, and the position that ring skeleton matches with seal ring is a spill arc surface structure, and spill arc surface base diameter is greater than the internal diameter of seal ring;
Its whole annexation is: the reciprocating type combination seal of assembled shaft on the piston, axis passes axle and is integral with reciprocating type combination seal and piston set, radial direction seal ring is installed in the corresponding seal groove on the inner chamber body excircle, combined seal ring and special-shaped sealing gasket are assembled in the ladder mounting groove on the inner chamber body opening end end face, special-shaped sealing gasket is conflicted between the sealed base upper groove is with top and combined seal ring, axis and piston in combination all-in-one-piece parts are assembled in the inner chamber body inner chamber, inner chamber body is together with axis, piston, combined seal ring, special-shaped sealing gasket and sealed base integral body are packed in the outer chamber, the sealed base upper groove is conflicted with the end face of bottom and the bottom of outer chamber, has the gap between the cylindrical of sealed base and the inwall of outer chamber;
Combined seal ring, special-shaped sealing gasket and sealed base are combined to form the floating seal assembly, and the left side of piston and inner chamber body are surrounded and constituted the air chamber that detonates, and the cylindrical section of axis and the inwall of piston surround and constitute the return air chamber; The cylindrical of piston and inner chamber body inwall form a cavity, and the cylindrical of inner chamber body and the inwall of outer chamber form a cavity, and two cavitys are connected by the hole on the inner chamber body and constitute the gas storage chamber of a sealing; Snap ring is assembled to the binding site of outer chamber and inner chamber body and both is fixed into one; Air input joint and electrically-controlled valve are installed to the left end of inner chamber body and load onto pressing plate, and air input joint is communicated with gas-entered passageway; Electrically-controlled valve, inner chamber body and piston constitute the loop of detonating.
Wherein, the thickness S of ring skeleton connection part get the high elasticity seal ring diameter of section 2/3～3/4 between;
Course of action: provide pressurized gas by air input joint to gas explosion sound source inside by extraneous source of the gas, pressurized gas enter the return air chamber through gas-entered passageway, air pressure moment in the air chamber is elevated to certain value, the lower piston that promotes the small piston drive piston on the piston is moved to the left along axis, the lower piston back side contacted and sealed with different in nature sealing gasket on the sealed base this moment, aperture on the axis is greater than aperture on the piston, like this inflation during the initial stage air pressure in the return air chamber greater than the air pressure in the gas storage chamber, to reach the purpose that piston is resetted rapidly; After air pressure in the gas storage chamber is increased to setting value gradually subsequently, keep balance with the air pressure in the return air chamber, be enclosed in the gas in gas storage chamber and the return air chamber, act on the piston upper piston towards the active force on a left side greater than acting on the active force of lower piston towards the right side, can guarantee that lower piston face and special-shaped sealing gasket be close to, reach seal request; Discharge as gas moment that need will be enclosed in the gas storage chamber, then electrically-controlled valve is opened under the control unit effect, pressurized gas in the gas storage chamber flow in the air chamber that detonates through the loop of detonating, and the upper surface of piston upper piston produced to the right an active force, act on like this piston upper piston towards the gas pressure on the right side with act on lower piston towards the active force sum on the right side greater than act on the piston upper piston towards the gas pressure on a left side with act on the hydraulic pressure sum of lower piston towards a left side, piston moment moves right like this, the gas that is enclosed in the cavity is released to rapidly in the external environment, promptly finishes gas release one time; Because extraneous source of the gas is constantly to providing pressurized gas by air input joint to gas explosion sound source inside, after gas release, the air pressure in the return air chamber is greater than the air pressure in the gas storage chamber, and piston enters gas storage state once more to left movement.
For improving the sealability between special-shaped sealing gasket and piston lower piston, the contact position of special-shaped sealing gasket and piston lower piston face is designed to lip, its effect is to guarantee to have under the certain intensity condition, certain toughness is arranged again, promptly under the condition that guarantees certain impact resistance, can reach the requirement of sealability;
For guaranteeing that " the floating seal assembly " that constitute can not occur card in the course of the work and end phenomenon, the triangular structure that the sealed base groove is circumferentially had some vertical projectioies with the outer surface edge of bottom, triangular structure reduce " floating seal assembly " in the course of the work with the surface friction drag of outer chamber contact segment, simultaneously with the function of certain guiding;
For guaranteeing " floating seal assembly " in the course of the work, damage special-shaped sealing gasket or high elasticity seal ring because of the impact force that is subjected to is excessive, the solution of taking is: will leave slit L between sealed base and inner chamber body bottom surface, its slit L size is no more than 20% of special-shaped sealing gasket and the high elasticity seal ring amount of being compressed sum, otherwise fragile Sealing.
Beneficial effect:
1, combined seal ring of the present utility model adopts the structural type that ring skeleton and high elasticity seal ring are formed, owing to adopted above-mentioned structural type, so the sealing device can be with end face static sealing mobilism, even static seal has the characteristic that in axial direction moves within the specific limits, possesses dynamic " floating " sealability.Therefore, can bear the impact of high speed alternate load in the course of the work and make Sealing reach the sealing usefulness of expection;
The error of bringing when 2, combined seal ring of the present utility model reduces component processing and assembling has certain displacement amount, to eliminate the influence of above-mentioned error to sealability in the course of the work vertically to the influence of sealability;
3, seal arrangement of the present utility model in the course of the work can will enter liquid in the seal chamber discharge the sealing gas storage chamber, the one, with before special-shaped sealing gasket contacts, the gas of gas storage chamber is discharged water at the lower piston of piston; The 2nd, in seal process, the mechanism that has constituted " floating seal assembly " still can be moved to the left certain distance with piston, and the part water that remains among the L of slit is discharged by the inclined hole on the sealed base;
4, the utility model inner chamber body opening be designed to combined seal ring on the ring structure of C place same size; The E place that special-shaped sealing gasket and combined seal ring are matched is designed to identical structure and the size that is complementary, adopt the mode of transition fit, coaxality requirement when so promptly having guaranteed the assembling of inner chamber body and combined seal ring, the moving or deflection of the string in the time of can preventing combined seal ring work again.
Description of drawings
Fig. 1 is an overall structure sectional view of the present utility model;
Fig. 2 is the utility model sealed base structure sectional view;
Fig. 3 is the utility model sealed base plan structure schematic representation;
Fig. 4 is the utility model combination seal coil structures sectional view.
Wherein, the detonate special-shaped sealing gasket of air chamber, 8-gas storage chamber, 9-piston, 10-return air chamber, 11-sealed base, 12-, 13-combined seal ring, 14-axis, 15-detonate loop, 17-electrically-controlled valve, 18-ring skeleton, 19-seal ring of 1-air input joint, 2-pressing plate, 3-snap ring, 4-outer chamber, 5-gas-entered passageway, 6-inner chamber body, 7-.
Embodiment
Below in conjunction with the accompanying drawing embodiment that develops simultaneously, the utility model is described in detail.
As shown in Figure 1, the utility model provides a kind of back pressure type floating seal, comprises outer chamber 4, inner chamber body 6, piston 9, sealed base 11, special-shaped sealing gasket 12, combined seal ring 13 and axis 14; Wherein, annular groove is radially arranged on the excircle of sealed base 11 together, groove two-part diameter does not up and down wait, diameter is that to be slightly larger than diameter be d one end to the end of D, diameter is that the end of D circumferentially has oblique through hole on the sealed base 11, and diameter is the mounting groove that has special-shaped sealing gasket 12 on the end face of an end of d; Combined seal ring 13 is made up of ring skeleton 18 and seal ring 19, seal ring 19 is sleeved on the circumference of ring skeleton 18, for making seal ring 19 can be installed on the ring skeleton 18 reliably, the position that ring skeleton 18 matches with seal ring 19 is designed to the form of spill arc surface structure, spill arc surface base diameter is slightly larger than the internal diameter of high elasticity seal ring 19, can guarantee that like this high elasticity seal ring 19 and ring skeleton 18 closely match, and can guarantee that again seal ring 19 has the decrement that enough seals; The thickness S of ring skeleton 18 connection parts get seal ring 19 diameter of section 2/3～3/4 between;
Its whole annexation is: the reciprocating type combination seal of assembled shaft on the piston 9, axis 14 passes axle and forms one with reciprocating type combination seal and piston 9, the Sealing that is assemblied on the piston 9 is isonomic reciprocating Sealing, so both can guarantee sealability, the fast-response in the time of can guaranteeing piston 9 work again; The radial direction seal ring of standard is contained on inner chamber body 6 excircles in the corresponding seal groove, successively combined seal ring 13 and special-shaped sealing gasket 12 are assembled in the ladder mounting groove on the inner chamber body 6 opening end end faces, special-shaped sealing gasket 12 conflict sealed base 11 on it diameter be between the end and combined seal ring 13 of d, axis 14 is assembled in inner chamber body 6 inner chambers with the parts that piston 9 is combined into one, inner chamber body 6 is together with axis 14, piston 9, combined seal ring 13, special-shaped sealing gasket 12 and sealed base 11 integral body are packed in the outer chamber 4, diameter is to conflict in the end face of D one end and the bottom of outer chamber 4 on the sealed base 11, has the gap between the inwall of the cylindrical of sealed base 11 and outer chamber 4;
Combined seal ring 13, special-shaped sealing gasket 12 and sealed base 11 are combined to form the floating seal assembly, and the left side of piston 9 and inner chamber body 6 are surrounded and constituted the air chamber 7 that detonates, and the cylindrical section of axis 14 and the inwall of piston 9 surround and constitute return air chamber 10; Assembly after above-mentioned assembling finished is packed in the inner chamber of outer chamber 4, the cylindrical of piston 9 and inner chamber body 6 inwalls form a cavity, the inwall of the cylindrical of inner chamber body 6 and outer chamber 4 forms a cavity, two gas storage chambers 8 that cavity is connected and constituted a sealing by the hole on the inner chamber body 6; Snap ring is assembled on the binding site of outer chamber 4 and inner chamber body 6, and fuses with bolton; After air input joint 1 and electrically-controlled valve 17 be in place, load onto pressing plate 2, and use bolton, can constitute gas-entered passageway 5 like this; Simultaneously constitute the loop 15 of detonating by electrically-controlled valve 17, inner chamber body 6 and piston 9;
As shown in Figure 2, the diameter that has some oblique through holes (Fig. 3 annotates the B place) on the sealed base is that the end of D is slightly larger than the other end that diameter is d, as can be seen from Figure 1, special-shaped sealing gasket 12 is to be assemblied on the internal diameter that diameter is d one end, be equipped with combined seal ring 13 at special-shaped sealing gasket 12 and 6 of inner chamber body, constituted the floating seal assembly.She Ji purpose is like this: after the gas release, a certain amount of water may be brought in the gas storage chamber 8 in piston 9 return processes, for the water in the gas storage chamber 8 is discharged, be adopted loose fit between combined seal ring 13, inner chamber 6 and the fixing ring 12; Water during piston action in the gas storage chamber 8 flow among the L of slit by the gap between combined seal ring 13, inner chamber 6 and the fixing ring 12, and the inclined hole from the sealed base is discharged then.
For " the floating seal assembly " that makes formation has certain impact resistance, select for use the high elasticity engineering plastics to make special-shaped sealing gasket 12, simultaneously for improving the sealability between special-shaped sealing gasket 12 and piston 9 lower pistons, the contact position of special-shaped sealing gasket 12 and piston 9 lower piston faces is designed to lip, its effect is to guarantee to have under the certain intensity condition, certain toughness is arranged again, promptly under the condition that guarantees certain impact resistance, can reach the requirement of sealability; For guaranteeing that " the floating seal assembly " that constitute can not occur card in the course of the work and end phenomenon, with sealed base 11 diameters is the triangular structure that the big end outer surface design of D has some vertical projectioies, see that Fig. 3 annotates the A place, She Ji purpose is like this: reduce " floating seal assembly " in the course of the work with the surface friction drag of outer chamber 4 contact segments, simultaneously with the function of certain guiding; The error of bringing during for processing of reduction component and assembling is to the influence of sealability, in the mechanism of the floating seal assembly that constitutes, be provided with combined seal ring 13, its effect is that certain displacement amount is arranged in the course of the work vertically, to eliminate the influence of above-mentioned error to sealability; For guaranteeing that the high elasticity seal ring 19 on the combined seal ring 13 can stably be installed on " floating seal assembly ", adopt skeleton construction, be about to high elasticity seal ring 19 and be assemblied on the ring skeleton 18, as shown in Figure 4.Ring skeleton 18 can be made by metal or high-strength engineering plastic, for making high elasticity seal ring 19 can be installed on the ring skeleton 18 reliably, to be designed to the form of spill arc surface structure with the position that high elasticity seal ring 19 matches, the diameter of section of the high elasticity seal ring 19 that its thickness S is designed to match with it 2/3～3/4 between, as shown in Figure 4, spill arc surface base diameter is slightly larger than the internal diameter of high elasticity seal ring 19, can guarantee that like this high elasticity seal ring 19 and ring skeleton 18 closely match, and can guarantee that again high elasticity seal ring 19 has the decrement that enough seals; For guaranteeing " floating seal assembly " in the course of the work, damage special-shaped sealing gasket 12 or high elasticity seal ring 19 because of the impact force that is subjected to is excessive, the solution of taking is: sealed base 11 and inner chamber body 6 bottom surfaces are seen left a certain amount of slit L, its slit L size must not surpass 20% of special-shaped sealing gasket 12 and high elasticity seal ring 19 amount of being compressed sums, otherwise fragile Sealing; For guaranteeing that the moving or phenomenon that deflects of string can not appear in combined seal ring 13 in the course of the work, with inner chamber body 6 openings be designed to combined seal ring 13 on the ring structure of C place same size; The E place that special-shaped sealing gasket 12 and combined seal ring 13 are matched is designed to identical structure and the size that is complementary, and adopts the mode of transition fit.
In sum, more than be preferred embodiment of the present utility model only, be not to be used to limit protection domain of the present utility model.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (4)
1. the back pressure type floating seal is characterized in that: comprise outer chamber (4), inner chamber body (6), piston (9), sealed base (11), special-shaped sealing gasket (12), combined seal ring (13) and axis (14); Wherein, annular groove is radially arranged on the excircle of sealed base (11) together, groove two-part diameter does not up and down wait, groove with the slightly larger in diameter of bottom in groove with top, sealed base (11) upper groove circumferentially has oblique through hole with the bottom, has the mounting groove of special-shaped sealing gasket (12) on the end face of groove with top; Combined seal ring (13) is made up of ring skeleton (18) and seal ring (19), seal ring (19) is sleeved on the circumference of ring skeleton (18), the position that ring skeleton (18) matches with seal ring (19) is a spill arc surface structure, and spill arc surface base diameter is greater than the internal diameter of seal ring (19);
Its whole annexation is: piston (9) is gone up the reciprocating type combination seal of assembled shaft, axis (14) passes axle and forms one with reciprocating type combination seal and piston (9), radial direction seal ring is installed in the corresponding seal groove on inner chamber body (6) excircle, combined seal ring (13) and special-shaped sealing gasket (12) are assembled in the ladder mounting groove on inner chamber body (6) the opening end end face, special-shaped sealing gasket (12) is conflicted between sealed base (11) upper groove is with top and combined seal ring (13), axis (14) is assembled in inner chamber body (6) inner chamber with the parts that piston (9) is combined into one, inner chamber body (6) is together with axis (14), piston (9), combined seal ring (13), special-shaped sealing gasket (12) and sealed base (11) integral body are packed in the outer chamber (4), sealed base (11) upper groove is conflicted with the end face of bottom and the bottom of outer chamber (4), has the gap between the inwall of the cylindrical of sealed base (11) and outer chamber (4);
Combined seal ring (13), special-shaped sealing gasket (12) and sealed base (11) are combined to form the floating seal assembly, the left side of piston (9) and inner chamber body (6) are surrounded and are constituted the air chamber (7) that detonates, and the inwall of the cylindrical section of axis (14) and piston (9) surrounds and constitutes return air chamber (10); The cylindrical of piston (9) and inner chamber body (6) inwall form a cavity, and the inwall of the cylindrical of inner chamber body (6) and outer chamber (4) forms a cavity, and two cavitys are connected by the hole on the inner chamber body (6) and constitute the gas storage chamber (8) of a sealing; Snap ring (3) is assembled to outer chamber (4) and is fixed into one with the binding site of inner chamber body (6) and with both; Air input joint (1) and electrically-controlled valve (17) are installed to the left end of inner chamber body (6) and load onto pressing plate (2), and air input joint (1) is communicated with gas-entered passageway (5); Electrically-controlled valve (17), inner chamber body (6) and piston (9) constitute the loop (15) of detonating.
2. back pressure type floating seal as claimed in claim 1 is characterized in that the thickness S of described ring skeleton (18) connection part gets 2/3～3/4 of high elasticity seal ring (19) diameter of section.
3. back pressure type floating seal as claimed in claim 1 is characterized in that described sealed base (11) groove circumferentially has the triangular structure of vertical projection with the outer surface edge of bottom.
4. back pressure type floating seal as claimed in claim 1 is characterized in that slit L is no more than 20% of special-shaped sealing gasket (12) and high elasticity seal ring (19) amount of being compressed sum between described sealed base (11) and inner chamber body (6) bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220644944 CN203098860U (en) | 2012-11-29 | 2012-11-29 | Back-pressure-type floating seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220644944 CN203098860U (en) | 2012-11-29 | 2012-11-29 | Back-pressure-type floating seal device |
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| Publication Number | Publication Date |
|---|---|
| CN203098860U true CN203098860U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220644944 Expired - Fee Related CN203098860U (en) | 2012-11-29 | 2012-11-29 | Back-pressure-type floating seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203098860U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979909A (en) * | 2012-11-29 | 2013-03-20 | 中国船舶重工集团公司第七一○研究所 | Back-pressure-type floating seal device |
| WO2015101347A1 (en) * | 2014-01-03 | 2015-07-09 | 刘素华 | Floating sealing method of floating bushing sealing reciprocating impact apparatus and floating sealing reciprocating impact apparatus of sealing floating bushing of mining loader |
| CN109058563A (en) * | 2018-10-08 | 2018-12-21 | 哈尔滨工程大学 | High pressure bubble source under a kind of Pneumatic water |
| CN111043388A (en) * | 2019-12-18 | 2020-04-21 | 中国船舶重工集团有限公司第七一0研究所 | High-pressure electromagnetic valve for underwater high-pressure air gun |
-
2012
- 2012-11-29 CN CN 201220644944 patent/CN203098860U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979909A (en) * | 2012-11-29 | 2013-03-20 | 中国船舶重工集团公司第七一○研究所 | Back-pressure-type floating seal device |
| WO2015101347A1 (en) * | 2014-01-03 | 2015-07-09 | 刘素华 | Floating sealing method of floating bushing sealing reciprocating impact apparatus and floating sealing reciprocating impact apparatus of sealing floating bushing of mining loader |
| EA034076B1 (en) * | 2014-01-03 | 2019-12-25 | Сухуа Лю | Floating sealing method of floating bushing sealing reciprocating impact apparatus and floating sealing reciprocating impact apparatus of sealing floating bushing of mining loader |
| CN109058563A (en) * | 2018-10-08 | 2018-12-21 | 哈尔滨工程大学 | High pressure bubble source under a kind of Pneumatic water |
| CN109058563B (en) * | 2018-10-08 | 2023-12-12 | 哈尔滨工程大学 | Pneumatic type underwater high-pressure bubble source |
| CN111043388A (en) * | 2019-12-18 | 2020-04-21 | 中国船舶重工集团有限公司第七一0研究所 | High-pressure electromagnetic valve for underwater high-pressure air gun |
| CN111043388B (en) * | 2019-12-18 | 2022-03-04 | 中国船舶重工集团有限公司第七一0研究所 | High-pressure electromagnetic valve for underwater high-pressure air gun |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20171129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |