CN101463903B - High-pressure controllable slide valve type mechanical combination sealing system - Google Patents
High-pressure controllable slide valve type mechanical combination sealing system Download PDFInfo
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- CN101463903B CN101463903B CN2009100953919A CN200910095391A CN101463903B CN 101463903 B CN101463903 B CN 101463903B CN 2009100953919 A CN2009100953919 A CN 2009100953919A CN 200910095391 A CN200910095391 A CN 200910095391A CN 101463903 B CN101463903 B CN 101463903B
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Abstract
The invention discloses a high-pressure controllable slide-valve type mechanical combined sealing system. The system comprises a controllable slide valve stationary seal assembly and a rotating mechanical seal assembly; the controllable slide valve stationary seal assemble comprises a slide valve gland (13), a slide valve (11) and a tapered shaft sleeve (12) sheathed on a shaft shoulder, the tapered shaft sleeve (12) is positioned inside the slide valve gland (13), the slide valve (11) which is partially positioned in a flange (16) is hermetically connected with the tapered shaft sleeve (12) in a sliding way, and the flange (16) is provided with a pressure source channel I (161) and a pressure source channel II (162) which are respectively used for controlling the slide valve (11) to slide leftwards or slide rightwards; the rotating mechanical seal assembly comprises a rotating seat (9) which is fixedly connected with a shaft sleeve (10), a rotating ring (17) and a stationary ring (7)which are closely jointed on a seal face and the like. The sealing system can help greatly reduce and avoid leakage of dangerous fluid and serious accidents.
Description
Technical field
The present invention relates to a kind of combined type rotation axis seal, a kind of combined type rotation axis seal that adopts multi-stage sealed structure to form of saying so more specifically belongs to technical field of sealing technology.
Background technique
Combination sealing system is widely used in fluid machinery etc. and transports among the power equipment, with the sealing of satisfying its different operating conditionss and the needs of Maintenance and Repair, using the wider box-like sealing of traditional group at present, to mainly contain filler-mechanical seal, mechanical seal-gas-flow closure, sub-propeller-guiding valve sealing, mechanical seal-centrifugal parking sealer etc. several.
Filler-mechanical seal combined labyrinth and carbon gland is the combination seal that is sealed and matched and is used by packing seal and rotation combination, and wherein packing seal can be used as the standby rotary seal of mechanical seal and the emergent sealing of vehicle stop state, can realize the sealing to high pressure.But its overall axial length is bigger, and surface friction drag is big under the water-tight equipment operating condition, and sealing main shaft or axle sleeve wearing and tearing are bigger, and need supporting special cooling and lubricating system, and required accessory is more; Relatively poor for the online replacing ability of mechanical seal friction pair easy to wear in addition.
Mechanical seal-gas-flow closure combined labyrinth and carbon gland is made up of the air bag of mechanical seal and inflatable, and wherein mechanical seal adopts different mechanical seal patterns can satisfy the sealing with different pressures medium as the motive sealing in the rotating machinery operation process.Gas-flow closure is controlled by the external pressure source, and when charging into the gas of certain pressure in air bag, airbag aeration expands and also to hold the sealing main shaft tightly, thereby stops up leakage and realize rotating machinery parking sealer under static state.This combined sealing structure is simple, and the manipulation of air bag control is convenient, can satisfy the parking sealer under the low pressure condition and the maintain and replace operation of mechanical seal easily damaged parts, and under high pressure the sealing of air bag and reliability are relatively poor.
It is to free a kind of seal form that the guiding valve seal combination forms by sub-propeller dynamic seal and fluid power that sub-propeller-fluid power is freed the spool valve combinations sealing, under static state, guiding valve under the elastic force effect of spring or elastic seal ring be installed on main shaft on sealing surface contact, form end face seal, thereby avoided the leakage of vehicle stop state sealing medium; And when the fluid machinery entry into service, fluid machinery outlet port high-pressure liquid is introduced in the guiding valve oil hydraulic cylinder, guiding valve overcomes the surface friction drag of spring thrust and elastic seal ring and produces mobile under the hydraulic thrust effect, thereby throw off with seal face, prevented the friction damage of seal face, and sub-propeller is installed on the rear end of fluid machines drives impeller, when fluid machinery turns round sub-propeller along with main shaft together rotates, thereby will prevent the leakage of medium in the leak liquid reverse pumping reflux machinery.This kind seal form is simple in structure, and make full use of the control that automatically adjusts of pressure source that fluid machinery itself produces, do not need external accessory, but its salable pressure medium is lower, in fluid machinery driving moment end face seal experience friction phase, this external vehicle stop state can not guarantee good sealability.
Mechanical seal-centrifugal parking sealer is a kind of combination seal that is made of mechanical seal and centrifugal parking sealer, similar with top several seal form, the sealing of the pressure medium under the rotating equipment steady running state has been played in mechanical seal equally, has the sealing load height, the advantage of good seal performance; Centrifugal parking sealer is subjected to the seal face of spring thrust and forms with the centrifugal son that links to each other with a seal face, under vehicle stop state, seal face contacts with each other under the effect of spring thrust and has played seal action, centrifugal son will promote under action of centrifugal force that seal face overcomes spring thrust and break away from the other end when equipment operation, thereby can avoid bigger fretting wear.This seal form structure is also comparatively simple, does not need extraneous artificial intervention, yet the existence of centrifugal son often makes the dynamic stability of rotary main shaft reduce, and therefore should not adopt under high speed, and the sealing load when vehicle stop state is not high yet.
In sum, at present the combination seal product of widespread usage has mostly that parking sealer pressure is low, sealing reliability is poor, the repair and maintenance poor operability of black box, and that all can not satisfy the high pressure reliable sealing of hazardous chemical medium and black box presses disassembling, assembling and replacing at tape.
Seal request in view of hazardous chemical, and consider black box press the convenience of disassembling, assembling and replacing at tape, need to innovate at aspects such as the navigability of the sealing load that improves parking sealer, integrally-built sealability, combination seal and mounting process technology.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of compact structure, sealing load height, good seal performance, the good high-pressure controllable slide valve type mechanical combination sealing system of reliability, uses the sealing system can reduce and avoid the leakage of hazardous fluids and the generation of major accident significantly.
In order to solve the problems of the technologies described above, to the invention provides a kind of high-pressure controllable slide valve type mechanical combination sealing system, but comprise control slide valve static seal assembly and mechanical rotary seal assembly;
But control slide valve static seal assembly comprises guiding valve gland, guiding valve and is set in tapered hub on the shaft shoulder, tapered hub is positioned at the guiding valve gland, the guiding valve that partly is positioned at flange slides hermetically with tapered hub and links to each other, be fixedly linked to flange and guiding valve gland seal, flange is provided with 2 and is respectively applied for a control guiding valve left side sliding and right sliding pressure source passage I and pressure source passage II;
The mechanical rotary seal assembly comprises rotating ring and the stationary ring that the rotating seat that is fixedly linked with second axle sleeve and seal face fit tightly, and rotating ring and rotating seat are fixedly linked hermetically; The spring seat and the sealing gland that are positioned at sealing gland are fixedly linked, mechanical seal with an end of spring link to each other with spring seat, the other end supporting stationary ring; Stationary ring slides hermetically with sealing gland and links to each other.
Improvement as high-pressure controllable slide valve type mechanical combination sealing system of the present invention: combination sealing system also comprises emergent black box;
Emergent black box comprises the security seal valve seat, is fixedly linked the security seal valve seat and second sleeve sealing, and the security seal valve that is positioned at sealing gland slides hermetically with sealing gland and links to each other.
Further improvement as high-pressure controllable slide valve type mechanical combination sealing system of the present invention: emergent black box also comprises the emergent adjusting nut that is arranged on second axle sleeve, baffle ring and security seal valve are fixedly linked, and described emergent adjusting nut and baffle ring contact.
Further improvement as high-pressure controllable slide valve type mechanical combination sealing system of the present invention: sliding with the form of cone match between guiding valve and the tapered hub links to each other, the conical surface of tapered hub is provided with the primary seal circle, and guiding valve realizes that by above-mentioned primary seal circle and tapered hub sealing links to each other.
Further improvement as high-pressure controllable slide valve type mechanical combination sealing system of the present invention: at the flange internal surface groove is set, is provided with boss at guiding valve, boss slides hermetically with groove and links to each other; Guiding valve slides with guiding valve gland seal ground with flange respectively and links to each other; The groove that is positioned at the boss right side is cavity I, and cavity I is connected with pressure source passage I; The groove that is positioned at the boss left side is cavity II, and cavity II is connected with pressure source passage II.
Further improvement as high-pressure controllable slide valve type mechanical combination sealing system of the present invention: tapered hub is provided with the limit dais terrace that is used to control guiding valve right lateral journey.
Further improvement as high-pressure controllable slide valve type mechanical combination sealing system of the present invention: the security seal valve is provided with seal ring on the end face corresponding with the security seal valve seat.
The present invention be for the seal request that improves the hazardous fluids conveying equipment the special a kind of conventional seals combination of elements sealing system that is different from that is provided with.The present invention takes all factors into consideration various factors, set about from improving sealing reliability, adopt multi-stage sealed structure, and seal fitting installed change convenience and include in the purpose of design, adopt modular design, integrated installation, can effectively solve its sealing problem, through evidence, this sealing structure is functional, and reliability is higher.
But control slide valve static seal assembly of the present invention: it is to rely on outside oil liquid pressure to realize the switch of guiding valve is controlled fully, rather than the hydrodynamic pressure that adopts spring or fluid device self to produce is controlled; This measure can realize the static sealing of equipment under extremely high pressure, and can guarantee the mechanical rotary seal of equipment presence and the repair and replacement of standby emergent sealing.
Mechanical rotary seal assembly of the present invention adopts mobile equilibrium type contact-type mechanical seal in many springs of unit loading type state type.Rotating ring and auxiliary seal ring can be under the condition of not removing second axle sleeve and rotating seat disassembling, assembling and replacing conveniently, therefore can effectively improve the maintenance time, shortened time of contact with harmful matter.
Emergent black box of the present invention can take place for preventing great leakage accident when preceding two-stage seal failure, and can regulate rapidly after parking meets an urgent need seals, and makes it forced seal.
In sum, high-pressure controllable slide valve type mechanical combination sealing system of the present invention, have compact structure, sealing load height, good seal performance, the good advantage of reliability, use the sealing system can reduce and avoid the leakage of hazardous fluids and the generation of major accident significantly.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is the sectional structure schematic representation of high-pressure controllable slide valve type mechanical combination sealing system of the present invention.
Among Fig. 1: tightening nut 1, security seal spring seat 2, security seal valve seat 3, emergent sealing spring 4, mechanical seal spring 5, O RunddichtringO 6, stationary ring 7, auxiliary seal ring 8, rotating seat 9, the second axle sleeves 10, guiding valve 11, tapered hub 12, guiding valve gland 13, primary seal circle 14, guiding valve seal ring 15, flange 16, rotating ring 17, spring seat 18, sealing gland 19, seal ring 20, seal ring 21, security seal valve 22, baffle ring 23, emergent adjusting nut 24, cavity I 25, cavity II 26, sealing gasket 27, boss 111, limit dais terrace 121, seal ring 151, seal ring 152, pressure source passage I 161, pressure source passage II 162.
Embodiment
Fig. 1 has provided a kind of high-pressure controllable slide valve type mechanical combination sealing system, and it is made up of following 3 parts that are arranged in order from right to left: but control slide valve static seal assembly, mechanical rotary seal assembly and emergent black box.
But control slide valve static seal assembly comprises the tapered hub 12 that is used to be sleeved on the shaft shoulder, this tapered hub 12 is positioned at guiding valve gland 13, tapered hub 12 is made up of an open circles shell of column and a hollow cone section, the internal surface of the outer surface of this open circles shell of column and guiding valve gland 13 forms certain clearance, and this gap is generally 0.5～1mm; Outer surface in the hollow cone section of tapered hub 12 is provided with dovetail groove, places primary seal circle 14 in this dovetail groove, and primary seal circle 14 can be selected O type rubber ring for use.
The outer surface of the hollow cone section of the internal surface of guiding valve 11 and tapered hub 12 forms cone match, and guiding valve 11 can horizontally slip along this cone match.The limit dais terrace 121 of open circles shell of column on the tapered hub 12 and hollow cone section connecting place is used to limit guiding valve 11 right sliding degree, thereby prevents from can't throw off because of cone match wedge jail makes guiding valve 11 and tapered hub 12.
Rely on primary seal circle 14 to realize sealing between guiding valve 11 and the tapered hub 12.The right-hand member of the left end of guiding valve gland 13 and flange 16 is fixedly linked hermetically.
Dig at the internal surface of flange 16 right-hand members and to establish a groove.The outer surface dependence seal ring 152 of guiding valve 11 left ends slides hermetically with the internal surface of flange 16 and links to each other, and the outer surface dependence seal ring 151 of guiding valve 11 right-hand members slides hermetically with guiding valve gland 13 internal surfaces and links to each other.Neutral position at guiding valve 11 is provided with a boss 111, and this boss 111 is positioned at the groove of above-mentioned flange 16, and the outer surface of boss 111 relies on guiding valve seal ring 15 to realize sliding hermetically linking to each other with the surface of groove.
Being provided with 2 pressure source passages in the flange 16, is respectively pressure source passage I 161 and pressure source passage II 162.The surface of the surface of the surface of the right side of boss 111, guiding valve 11 and guiding valve gland 13 and flange 16 forms cavity I 25, and this cavity I25 is connected with pressure source passage I 161; When injecting hydraulic pressure in the pressure source passage I 161, can promote guiding valve 11 and be moved to the left.Equally, the surface of the left side of boss 111, guiding valve 11 and the surface of flange 16 form cavity II 26, and this cavity II 26 links to each other with pressure source passage II 162; When injecting hydraulic pressure in the pressure source passage II 162, can promote guiding valve 11 and move right.Guiding valve 11 has bigger stroke, can avoid the friction damage of primary seal circle 14 in rotation process.
The mechanical rotary seal assembly comprises rotating ring 17 and the stationary ring 7 that end face coincide mutually, and the rotating seat 9 and second axle sleeve 10 are fixedly linked hermetically; Rotating ring 17 is set in the rotating seat 9, and rotating ring 17 is fixedly linked with rotating seat 9, and rotating ring 17 relies between auxiliary seal rings 8 and the rotating seat 9 and realizes that sealing links to each other.Auxiliary seal ring 8 can be selected the O RunddichtringO for use.
The right-hand member of second axle sleeve 10 is set in the tapered hub 12, and the internal surface of the outer surface of second axle sleeve 10 and tapered hub 12 is a Spielpassung.Rely on sealing gasket 27 to seal between second axle sleeve 10 and the tapered hub 12.
The spring seat 18 that is positioned at sealing gland 19 is fixedly linked with sealing gland 19.The stationary ring 7 that is positioned at sealing gland 19 slides with spring seat 18 and links to each other, and be specially: the internal surface at stationary ring 7 is provided with three grooves, and three pawls that match and can horizontally slip in groove one by one mutually with above-mentioned three grooves are set on spring seat 18; So just can realize that stationary ring 7 links to each other with the slip of spring seat 18, can also play the effect that prevents stationary ring 7 rotations.Stationary ring 7 is realized sliding hermetically linking to each other by O RunddichtringO 6 and sealing gland 19.Mechanical seal with an end and the spring seat 18 of spring 5 be fixedly linked, the other end supporting stationary ring 7; Thereby the end face of guaranteeing rotating ring 17 and stationary ring 7 can fit tightly.Therefore, sealing gland 19, spring seat 18, mechanical seal are assembled together with spring 5 and stationary ring 7, thereby have formed an assembly, and purpose is to be convenient to this assembly is carried out dismounting and replacing.
Emergent black box comprises the security seal valve seat 3 that is positioned at security seal spring seat 2, and the internal surface of the outer surface of security seal valve seat 3 and security seal spring seat 2 forms certain clearance, and this gap is generally 0.5～1mm.Security seal valve seat 3 relies on the tightening nut 1 and second axle sleeve 10 to be fixedly linked, and between the security seal valve seat 3 and second axle sleeve 10 seal ring is set, so is fixedly linked hermetically between the security seal valve seat 3 and second axle sleeve 10.
The security seal valve 22 that is positioned at sealing gland 19 can horizontally slip along sealing gland 19, and security seal valve 22 relies on the sealing between seal ring 20 realizations and the sealing gland 19.Be provided with seal ring 21 on the security seal valve 22 with on security seal valve seat 3 corresponding those end faces.Emergent sealing with an end of spring 4 be fixed on the security seal spring seat 2, the other end supporting security seal valve 22.Under normal situation, be to use the emergent black box of this cover, therefore, in emergent sealing with under the thrust of spring 4, security seal valve 22 and security seal valve seat 3 be separated (end face that is both does not contact); Can avoid the wearing and tearing of seal ring 21 like this.
Security seal spring seat 2, sealing gland 19 and flange 16 rely on bolt to be fixedly linked successively.
During high-pressure controllable slide valve type mechanical combination sealing system real work of the present invention, second axle sleeve 10 is sleeved on the outside of axle, and tapered hub 12 is sleeved on the shaft shoulder.Flange 16 links to each other with the housing of power equipment.Pressure source passage I 161 and pressure source passage II 162 all join by two-position four-way valve and pressure source.Its concrete working procedure is as follows:
But 1 control slide valve static seal:
When power equipment remains static, but the system sealing function is by the control slide valve sealing realization of the first order.By switching the two-position four-way valve in the external hydraulic source, make the cavity II26 that is positioned at the left side communicate with hydraulic station mesohigh hydraulic oil, and the cavity I 25 that is positioned at the right side communicate with fuel tank by pressure source passage I 161 by pressure source passage II 162.Under the impetus of high-pressure and hydraulic oil, whole guiding valve 11 moves right, and the hydraulic oil flow oil sump tank in the cavity I 25 touches until guiding valve 11 right-hand members till the limit dais terrace 121 of tapered hub 12.At this moment, guiding valve 11 forms a micro-gap with the cone match of tapered hub 12, and this gap place is sealed by primary seal circle 14, thereby realizes the static seal of guiding valve 11.
2, mechanical rotary seal
When equipment is in operating condition, regulate the two-position four-way valve in the hydraulic control circuit, make cavity I 25 communicate with hydraulic station mesohigh hydraulic oil, and cavity II 26 communicate with fuel tank by pressure source passage II 162 by pressure source passage I 161.Whole guiding valve 11 is moved to the left under the hydraulic oil thrust, and the primary seal circle 14 in being arranged on tapered hub 12 no longer contacts with guiding valve 11, generally according to the hydraulic pressure area of sealing load and guiding valve 11 than the pressure that can determine to control oil sources.Rotating ring 17, rotating seat 9, second axle sleeve 10 and tapered hub 12 rotate with axle, and this moment, mechanical rotary seal played main seal action; Specific as follows:
The rotating ring 17 that is nested in the rotating seat 9 rotates with second axle sleeve 10 and axle under the moment of rotation effect, and the sealing between rotating ring 17 and the rotating seat 9 is finished by auxiliary seal ring 8.In a circumferential direction, stationary ring 7 under the qualification effect of spring seat 18, remain static (being that stationary ring 7 does not produce rotation); In the axial direction, stationary ring 7 fits tightly with rotating ring 17 under with the impetus of spring 5 in mechanical seal; 19 of stationary ring 7 and sealing glands are realized sealing by O RunddichtringO 6; Make relative fricting movement between rotating ring 17 and the stationary ring 7 and realize motive sealing between end face.
3, emergent sealing
And in case preceding two-stage seal failure takes place for preventing great leakage accident, can after parking, regulate emergent sealing rapidly and making it forced seal.Specific as follows: as can to stop immediately during current two-stage seal failure, and the emergent adjusting nut 24 that turns clockwise, emergent adjusting nut 24 is moved to the left, and drive baffle ring 23 is moved to the left, thereby drive the emergent sealing of security seal valve 22 compression indirectly with spring 44 and be moved to the left, with till security seal valve seat 3 contacts, 21 pairs of above-mentioned contact end faces of seal ring that be arranged on the security seal valve 22 this moment seal, thereby have realized the emergent sealing of equipment until the left end of security seal valve 22.
At last, it is also to be noted that what more than enumerate only is a specific embodiment of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (7)
1. high-pressure controllable slide valve type mechanical combination sealing system is characterized in that: but comprise control slide valve static seal assembly and mechanical rotary seal assembly;
But described control slide valve static seal assembly comprises guiding valve gland (13), guiding valve (11) and is set in tapered hub (12) on the shaft shoulder, tapered hub (12) is positioned at guiding valve gland (13), the guiding valve (11) that partly is positioned at flange (16) slides hermetically with tapered hub (12) and links to each other, described flange (16) and guiding valve gland (13) are fixedly linked hermetically, and flange (16) is provided with 2 and is respectively applied for control guiding valve (a 11) left side sliding and right sliding pressure source passage I (161) and pressure source passage II (162);
Described mechanical rotary seal assembly comprises rotating ring (17) and the stationary ring (7) that the rotating seat (9) that is fixedly linked with second axle sleeve (10) and seal face fit tightly, and rotating ring (17) is fixedly linked hermetically with rotating seat (9); The spring seat (18) that is positioned at sealing gland (19) is fixedly linked with sealing gland (19), mechanical seal with an end of spring (5) link to each other with spring seat (18), the other end is supporting stationary ring (7); Described stationary ring (7) slides hermetically with sealing gland (19) and links to each other.
2. high-pressure controllable slide valve type mechanical combination sealing system according to claim 1 is characterized in that: described combination sealing system also comprises emergent black box;
Described emergent black box comprises security seal valve seat (3), and security seal valve seat (3) is fixedly linked hermetically with second axle sleeve (10), and the security seal valve (22) that is positioned at sealing gland (19) slides hermetically with sealing gland (19) and links to each other.
3. high-pressure controllable slide valve type mechanical combination sealing system according to claim 2, it is characterized in that: described emergent black box also comprises the emergent adjusting nut (24) that is arranged on second axle sleeve (10), baffle ring (23) is fixedly linked with security seal valve (22), and described emergent adjusting nut (24) and baffle ring (23) contact.
4. high-pressure controllable slide valve type mechanical combination sealing system according to claim 3, it is characterized in that: sliding with the form of cone match between guiding valve (11) and the tapered hub (12) links to each other, the conical surface of described tapered hub (12) is provided with primary seal circle (14), and guiding valve (11) realizes that by above-mentioned primary seal circle (14) and tapered hub (12) sealing links to each other.
5. high-pressure controllable slide valve type mechanical combination sealing system according to claim 4 is characterized in that: at flange (16) internal surface a groove is set, is provided with boss (111) at guiding valve (11), described boss (111) slides hermetically with groove and links to each other; Described guiding valve (11) slides hermetically with guiding valve gland (13) with flange (16) respectively and links to each other; The groove that is positioned at boss (111) right side is cavity I (25), and described cavity I (25) is connected with pressure source passage I (161); The groove that is positioned at boss (111) left side is cavity II (26), and described cavity II (26) is connected with pressure source passage II (162).
6. high-pressure controllable slide valve type mechanical combination sealing system according to claim 5 is characterized in that: described tapered hub (12) is provided with the limit dais terrace (121) that is used to control guiding valve (11) right lateral journey.
7. high-pressure controllable slide valve type mechanical combination sealing system according to claim 6 is characterized in that: described security seal valve (22) is provided with seal ring (21) on the end face corresponding with security seal valve seat (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100953919A CN101463903B (en) | 2009-01-12 | 2009-01-12 | High-pressure controllable slide valve type mechanical combination sealing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100953919A CN101463903B (en) | 2009-01-12 | 2009-01-12 | High-pressure controllable slide valve type mechanical combination sealing system |
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| Publication Number | Publication Date |
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| CN101463903A CN101463903A (en) | 2009-06-24 |
| CN101463903B true CN101463903B (en) | 2010-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100953919A Expired - Fee Related CN101463903B (en) | 2009-01-12 | 2009-01-12 | High-pressure controllable slide valve type mechanical combination sealing system |
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Cited By (1)
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| CN102606742A (en) * | 2012-03-08 | 2012-07-25 | 大连华阳光大密封有限公司 | Mechanical seal transmission device applied to high-pressure working conditions |
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| CN102606736B (en) * | 2011-01-21 | 2015-01-21 | 昆山密友机械密封有限公司 | Sealing device for reaction kettles |
| CN102619984A (en) * | 2012-03-29 | 2012-08-01 | 大连华阳光大密封有限公司 | Mechanical sealing device for high pressure working condition |
| CN104395655B (en) * | 2012-08-29 | 2018-02-02 | 伊格尔工业股份有限公司 | Mechanical seal |
| CN103486269B (en) * | 2013-09-19 | 2015-07-08 | 丹东克隆集团有限责任公司 | Security sealing device and application for pumps |
| CN103512685B (en) * | 2013-10-11 | 2015-04-08 | 浙江大学 | Sealing force testing device used for studying damping seal prerotation effect |
| CN103967768B (en) * | 2014-05-09 | 2017-01-25 | 徐承韬 | Device for preventing eccentric wear of guide ring and application method thereof |
| CN106151523B (en) * | 2016-06-30 | 2018-06-26 | 西安航天动力研究所 | A kind of combined mechanical sealing structure of multistage protection |
| CN106949086B (en) * | 2017-02-27 | 2019-06-11 | 浙江大学 | A kind of combined mechanical sealing device |
| CN109488769B (en) * | 2018-12-20 | 2024-01-16 | 丹东克隆集团有限责任公司 | Double-end-face mechanical seal with bidirectional spiral pumping ring sealing liquid circulation mechanism |
| CN109932169B (en) * | 2019-04-08 | 2020-05-29 | 浙江大学 | Mechanical seal test device with adjustable seal ring axis deflection angle |
| CN112709825A (en) * | 2020-12-23 | 2021-04-27 | 栾彦岭 | Composite sealing element for coal slag door of coal mill of power plant |
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2009
- 2009-01-12 CN CN2009100953919A patent/CN101463903B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606742A (en) * | 2012-03-08 | 2012-07-25 | 大连华阳光大密封有限公司 | Mechanical seal transmission device applied to high-pressure working conditions |
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| CN101463903A (en) | 2009-06-24 |
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Granted publication date: 20100908 Termination date: 20140112 |