CN103090010A - Non-contact sealing system - Google Patents
Non-contact sealing system Download PDFInfo
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- CN103090010A CN103090010A CN201310012834XA CN201310012834A CN103090010A CN 103090010 A CN103090010 A CN 103090010A CN 201310012834X A CN201310012834X A CN 201310012834XA CN 201310012834 A CN201310012834 A CN 201310012834A CN 103090010 A CN103090010 A CN 103090010A
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Abstract
The invention discloses a system for actuating non-contact sealing to moving parts. The system comprises a pulley group, a support frame, sealing pipeline units and a liquid supply assembly. The pulley group is used for delivering the moving parts serving as sealing objects along an upstream journey and a downstream journey, the sealing pipeline units are respectively arranged along the upstream journey and the downstream journey of the moving parts and are respectively formed by connecting multiple sections of pipes in series, and adjacent pipe sections are connected with transition pipes with small pipe diameter. The liquid supply assembly is used for delivering sealing liquid to downstream sealing pipeline units and simultaneously is communicated with the upstream sealing pipeline units to keep backflow of the sealing liquid. The invention further discloses other optimized structural patterns. The non-contact sealing system has the advantages of being free of abrasion, small in sealing resistance and reliable in long-term operation, can enable sealing pressure to be adjusted along with fluid pressure fluctuation in adaptive mode, and is especially suitable for effective sealing of the moving parts, such as oil pumping unit steel wire ropes.
Description
Technical field
The invention belongs to technical field of sealing technology, more specifically, relate to and a kind ofly can be used for containing the cavity of high-pressure liquid and be in noncontact seal system between movement parts in cavity, and be particularly useful for petroleum production with the non-contact seal applications of the kind equipment of pumping unit.
Background technique
Have the sealing demand of a type games spare in industry, it need to and be between movement parts in this cavity at the cavity that contains high-pressure liquid carries out effective sealing, flow to outside cavity by the gap between cavity and movement parts to avoid high-pressure liquid.When the sectional shape of movement parts has time-varying characteristics and hermetic resistance can not be excessive the time, problem of difficult sealing is particularly outstanding reliably and with long-term for it.
As example, it utilizes rope hoisting to be arranged in the oil pumping barrel of oil pick-up tube, thereby underground crude oil is released with the pumping unit that uses in the petroleum production process; But contain the higher rock gas of pressure in oil pick-up tube, need to store separately and can not directly be disposed in atmosphere, otherwise easily cause fire, the danger such as poisoning.In addition, the wire rope in oil pick-up tube need to carry out the to-and-fro motion of large stroke, and the cross section of considering especially wire rope is not desirable smooth circular section, its reliably and with long-term sealing problem fail effectively to be solved always.
For above-mentioned sealing problem, what extensively adopt at present is the contact seal mode.Research finds, the existing deficiency of contact seal mode is: the first, and the sealing mode may be because coordinating tension, causes that hermetic resistance is large, the oil pumping system energy consumption is high; Perhaps because coordinating defective tightness, be difficult to the rock gas of pressure higher (as 0.5MPa) is formed effective sealing; Second, the sealing mode exists Sealing easy to wear and then cause the problem of seal failure, during especially large when movement parts to-and-fro motion stroke, sectional shape temporal evolution, the wear problem of tradition contact seal mode lower seal is particularly outstanding, and causes the problem of difficult sealing reliably and with long-term; The 3rd, the factor that this type of sealing system also need be considered when using is, there is larger uncertainty in the pressure size of pipeline mesohigh fluid, and this gives and utilizes fluid to carry out noncontact seal to have caused certain difficulty.For example, for pumping unit, change rapidly if realize the hydrodynamic pressure of sealing function can not follow the pressure of sealed rock gas, might be because fluid-encapsulated pressure cause seal failure not, perhaps overpressure causes the fluid refluence to be saved the situation going in right air cavity.Correspondingly, exist in corresponding field existing sealing means is made adjustment or further improved technical need.
Summary of the invention
Above defective or technical need for prior art, the object of the present invention is to provide a kind of noncontact seal system, it is by adopting the fluid mode carry out the non-contact seal process and make design and improve the closed conduit assembly of key is corresponding, constructed sealing system possesses without wearing and tearing, little, the reliable advantage of long-term motion of hermetic resistance, and after increasing detection and feedback control assembly, also having sealing load can be with the hydrodynamic pressure characteristic that self adaption regulates that fluctuate, thereby is particularly useful for the effective sealing of steel wire rope of oil pumping unit and so on movement parts.
According to one aspect of the present invention, provide a kind of for movement parts being carried out the system of noncontact seal, this system comprises static pulley group, support frame, closed conduit unit and liquid supply assembly, it is characterized in that:
Described static pulley group comprises the first static pulley and the second static pulley that is equipped with respectively sealed case, and the 3rd static pulley, wherein the first static pulley and the 3rd static pulley are fixedly mounted on the upper backup pad of support frame side by side, the second static pulley is fixedly mounted on the lower supporting plate downside of support frame and is between the first and the 3rd static pulley, walks around successively first, second, and third static pulley as the movement parts of sealed object and then continues to carry;
Described closed conduit unit is arranged between the upper and lower dunnage of support frame, and the backflow buffer cavity that is set gradually by the transport path along movement parts from the first static pulley to the second static pulley and the first closed conduit assembly and the second closed conduit assembly of arranging along movement parts from the transport path of the second static pulley to the three static pulley form jointly, wherein said first, second closed conduit assembly all forms in the mode of multistage pipeline series connection, and is connected by the relatively less transition pipeline of caliber between each segment pipe adjacent one another are;
Described liquid supply assembly is used for being in pipeline topmost to the first closed conduit assembly and carries sealing fluid, keeps the backflow of sealing fluid to be communicated with the second closed conduit assembly simultaneously.
As further preferably, each segment pipe in described first, second closed conduit assembly arranges at each interval, and is connected by described transition pipeline at interval location and realizes that thus fluid is communicated with.
As further preferably, each segment pipe in described first, second closed conduit assembly arranges each other closely, and possesses respectively the dividing plate that has through hole at contact position, and described transition pipeline embeds to be arranged on realizes thus in each through hole that fluid is communicated with; Wherein the transition pipeline in the first sealing pipeline assembly is arranged on respectively the upside of corresponding dividing plate, and the transition pipeline in the second sealing pipeline assembly is arranged on respectively the downside of corresponding dividing plate.
As further preferably, each free integral seal pipeline of described first, second closed conduit assembly becomes the multistage pipeline with a plurality of barrier partitions of putting in the inner and have a through hole, and described transition pipeline embeds to be arranged on realizes thus in each through hole that fluid is communicated with; Wherein the transition pipeline in the first sealing pipeline assembly is arranged on respectively the upside of corresponding baffle plate, and the transition pipeline in the second sealing pipeline assembly is arranged on respectively the downside of corresponding baffle plate.
As further preferably, the net sectional area that in described the first closed conduit assembly, in each segment pipe, seal fluid flows through is A
1, the net sectional area that in described the second closed conduit assembly, in each segment pipe, seal fluid flows through is A
2, the net sectional area that in described transition pipeline, seal fluid flows through is A
3, and satisfy following relation: A
1〉=10A
3, A
2〉=10A
3
As further preferably, described liquid supply assembly comprises sealing fluid reflow pipe, sealing fluid storage tank, pump and liquid feeding pipeline, wherein be stored in the interior seal fluid of sealing fluid storage tank under the driving of pump, then be delivered to the first closed conduit assembly through the sealingfluid inlet pipe via the liquid feeding pipeline that is equipped with one-way valve and be in pipeline topmost, keeping refluxing by sealing fluid reflow pipe and the second closed conduit assembly simultaneously is communicated with.
As further preferably, described liquid supply assembly comprises sealing fluid reflow pipe, the first sealing fluid storage tank, pump, liquid feeding pipeline and the second sealing fluid storage tank, wherein be stored in the interior seal fluid of the first sealing fluid storage tank under the driving of pump, be delivered to the second sealing fluid storage tank via open end in the liquid feeding pipeline bottom the second sealing fluid storage tank, keeping refluxing by sealing fluid reflow pipe and the second closed conduit assembly simultaneously is communicated with; Described the second sealing fluid storage tank is provided with the air communicating pipe road at the apical position of its sidewall and is used for being connected with the pressurized gas of described backflow buffer cavity inside, and the position higher than the bottom is provided with the fluid connection pipeline in the lower end of its sidewall, is in pipeline topmost to the first closed conduit assembly thus and carries sealing fluid.
As further preferably, described system also includes the Detection ﹠ Controling unit, this Detection ﹠ Controling unit comprises gas pressure sensor and drive controller, wherein gas pressure sensor is carried out for the gas pressure in the sealed case that the first static pulley is equipped with and is detected, drive controller is according to flow and the pressure of the corresponding adjusting seal fluid of gas pressure change signal that detects, thereby makes the liquid level pressure of seal fluid in the first closed conduit assembly and the gas pressure in sealed case substantially be consistent.
as further preferably, described system also includes the Detection ﹠ Controling unit, this Detection ﹠ Controling unit comprises the entrance flowmeter, rate of discharge meter and drive controller, wherein the inlet flow rate meter is arranged near sealingfluid inlet pipe for detection of the fluid flow that is delivered to the first closed conduit assembly, it is neighbouring for detection of the fluid flow that is back to the sealing fluid storage tank that the rate of discharge meter is arranged on the sealing fluid reflow pipe, drive controller is according to flow and the pressure of the corresponding adjusting seal fluid of testing result difference of two flowmeters, thereby make the liquid level pressure of seal fluid in the first closed conduit assembly and the gas pressure in sealed case substantially be consistent.
As further preferably, described system also includes the Detection ﹠ Controling unit, this Detection ﹠ Controling unit comprises liquid level detection device and drive controller, wherein liquid level detection device is arranged on second and seals in also storage tank inner for the detector liquid level height, drive controller is according to flow and the pressure of the corresponding adjusting seal fluid of liquid level height variable signal that detects, thereby makes the liquid level pressure of seal fluid in the first closed conduit assembly and the gas pressure in sealed case substantially be consistent.
As further preferably, be installed with respectively a plurality of upper saw pulleys in described first, second closed conduit assembly, this upper saw pulley is arranged on movement parts both sides in couples to limit its rocking in the closed conduit assembly.
As further preferably, each segment pipe and transition pipeline in described first, second closed conduit assembly are spliced by half-watt formula sealing structure.
As further preferably, described movement parts is the wire rope of pumping unit.
As further preferably, described seal fluid is water, oil or both mixtures.
According to another aspect of the present invention, provide a kind of for movement parts being carried out the system of noncontact seal, this system comprises closed conduit unit and liquid supply assembly, it is characterized in that:
Described closed conduit unit is along as the transport path of the movement parts of sealed object and arrange, and comprise at least one closed conduit assembly, described closed conduit assembly forms in the mode of multistage pipeline series connection, and is connected by the relatively less transition pipeline of caliber between each segment pipe adjacent one another are;
Described liquid supply assembly comprises liquid feeding pipeline, sealing fluid storage tank and sealing fluid reflow pipe, the seal fluid that is stored in the sealing fluid storage tank is delivered to via liquid feeding pipeline the pipeline that described closed conduit assembly is in the top, and keeping refluxing by sealing fluid reflow pipe and closed conduit assembly simultaneously is communicated with.
In general, according to noncontact seal of the present invention system compared with prior art, mainly possess following technological merit:
1, owing to adopting the fluid mode to carry out sealing, substantially contactless between moving element and fixed structure hermetic resistance is minimum without friction, thus guarantee that the sealing system sport life span is long, reliability high in, can significantly reduce the work energy consumption of moving element;
2, design by the structure to the closed conduit assembly, can correspondingly produce the pressure loss local and on the way, and make the pressurized gas of associated movement parts be reduced to gradually identical with barometric pressure; In addition, can also dwindle the gap between moving element and transition conduit, reduce the flow of seal fluid, further reduce the required power of sealing system motion;
3, by outfit Detection ﹠ Controling unit, the variation of the pressure follow high-pressure gas pressure of seal fluid is regulated voluntarily, therefore sealing system is applicable to the sealing under the gas with various pressure condition, and the fluctuation to high-pressure gas pressure has followability preferably, sealing system applied widely.
Description of drawings
Fig. 1 is used for steel wire rope of oil pumping unit is carried out the system global structure schematic diagram of non-contact sealing according to the present invention's the first preferred implementation;
Fig. 2 is used for steel wire rope of oil pumping unit is carried out the system global structure schematic diagram of non-contact sealing according to the second preferred embodiment of the invention mode;
Fig. 3 a is used for steel wire rope of oil pumping unit is carried out the system global structure schematic diagram of non-contact sealing according to the third preferred embodiment of the invention mode;
Fig. 3 b is the worm's eye view of descending closed conduit in sealing system shown in Fig. 3 a;
Fig. 4 a is used for steel wire rope of oil pumping unit is carried out the system global structure schematic diagram of non-contact sealing according to the four preferred embodiment of the invention mode;
Fig. 4 b is the worm's eye view of the descending closed conduit in sealing system shown in Fig. 4 a;
Fig. 5 is used for steel wire rope of oil pumping unit is carried out the system global structure schematic diagram of non-contact sealing according to the fifth preferred embodiment of the invention mode.
Embodiment
In order to make purpose of the present invention, technological scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As previously mentioned, often there is the sealing demand of a type games spare in industry, it need to and be between movement parts in this cavity at the cavity that contains high-pressure liquid carries out effective sealing, flow to outside cavity by the gap between cavity and movement parts to avoid high-pressure liquid.Yet there are various deficiencies in the sealing means for this type of movement parts in prior art, so in the present invention, expectation builds a kind of new noncontact seal system and sealing means thereof, in order to realize better sealing effect.
For the ease of explaining and explanation, the below will be with the steel wire rope of oil pumping unit that used in the petroleum production process as example, specifically describes sealing principle and the process to this type of movement parts according to noncontact seal of the present invention system.
Fig. 1 is used for steel wire rope of oil pumping unit is carried out the system global structure schematic diagram of non-contact sealing according to the present invention's the first preferred implementation.As shown in fig. 1, the non-contact sealing system according to the present invention's the first preferred implementation mainly comprises the parts such as static pulley group 1, support frame 2, closed conduit unit 3 and liquid supply assembly 4.Static pulley 1 comprises at least three static pulley, i.e. the first static pulley 121, the second static pulley 131 and the 3rd static pulley 141, wherein the first static pulley 121 and the second static pulley 131 dispose respectively in its outside be used to preventing the sealed case 122 that pressurized gas are overflowed, the outside dirt seal housing 142 that for example is equipped with of 132, the three static pulley 141; For longer more effective sealing stroke is provided for the wire rope 11 as sealed object, as a kind of preferred arrangement, the first static pulley 121 and the 3rd static pulley 141 are fixedly mounted on the upper backup pad 21 of support frame 2 side by side, the second static pulley 131 is fixedly mounted on lower supporting plate 22 downsides of support frame 2 and is between the first and the 3rd static pulley, sealed case 122,132 is tightly connected with corresponding dunnage, and this place's static pulley and both sides thereof are sealed for the through hole that wire rope passes through; The wire rope of pumping unit is stretching out outside oil pick-up tube, walks around successively first, second, and third static pulley, then for example is connected with winch and carries in order to continue.
Closed conduit unit 3 is arranged between the upper and lower dunnage 21,22 of support frame 2, and jointly is comprised of backflow buffer cavity 31, the first closed conduit assembly 32 and the second closed conduit assembly 33.Wherein reflux buffer cavity 31 and the first closed conduit assembly 32 sets gradually along wire rope 11 from the transport path of the first static pulley 121 to second static pulley 131, and the second closed conduit assembly 33 arranges along wire rope 11 from the transport path of the second static pulley 131 to the 3rd static pulley 141.Wherein, backflow buffer cavity 31 is for all having up and down the cavity of through hole, its upper end and upper backup pad 21 are tightly connected, lower end and the first closed conduit assembly 32 are tightly connected, the position of backflow buffer cavity 31 should guarantee to make sealed case 122 to be communicated with the first closed conduit assembly 32, makes simultaneously wire rope 11 pass freely through from the hole of correspondence.As one of improvement of key, the first closed conduit assembly 32 and the second closed conduit assembly 33 all form in the mode of multistage pipeline series connection, and be connected by the relatively less transition pipeline of caliber between each segment pipe adjacent one another are, consist of thus the variable cross section fluid passage that a kind of cross-sectional sizes is alternately suddenlyd change.as shown in concrete in Fig. 1, first, the second closed conduit assembly 32, each segment pipe in 33 arranges each other closely, and possesses respectively the dividing plate that has through hole at contact position, bonded to each other and realize on the dividing plate of through-hole alignment, embedding is equipped with the caliber transition pipeline less with respect to the caliber of each segment pipe, wherein the transition pipeline in the first sealing pipeline assembly is arranged on respectively the upside of corresponding dividing plate, transition pipeline in the second sealing pipeline assembly is arranged on respectively the downside of corresponding dividing plate, thus first, the fluid passage of realizing respectively variable cross section in the second closed conduit assembly.In order to guarantee to keep suitable gap between inner each section transition pipeline of closed conduit and wire rope, can also the face of certain machining accuracy be set as datum clamp face on column frame 23, the first and second closed conduit assemblies are fixedly mounted on respectively on column frame 23, improve thus the integral installation precision of closed conduit system.
In addition, can also comprise Detection ﹠ Controling unit 6 according to the noncontact seal system of the present invention's the first preferred implementation, concrete gas pressure sensor 61 and the drive controllers 62 of for example comprising in this Detection ﹠ Controling unit 6, wherein gas pressure sensor 61 is arranged on the inside of sealed case 121, for detection of the pressure of pressurized gas 20; Gas pressure sensor 61 detects the gas pressure signal that obtains and reaches drive controller 62, the running state of the corresponding control pump 43 of gas pressure change signal that drive controller 62 obtains according to detection, thereby regulate flow and the pressure of seal fluid 5, finally make the liquid level pressure of seal fluid 5 in the second closed conduit assembly 32 and the pressure of pressurized gas substantially be consistent.
The below will be described more specifically the working principle according to noncontact seal of the present invention system.
Under normal circumstances, the liquid level pressure of seal fluid keeps equating with the pressure of pressurized gas substantially.The liquid level of oil pick-up tube, sealed case 122, backflow buffer cavity 31 and seal fluid consists of the sealing system of pressurized gas, makes pressurized gas not flow out to the external world by the closed conduit assembly.The varying-arca channel that the closed conduit assembly is alternately suddenlyd change by some groups of cross-sectional sizes forms, the entry end of small bore pipeline is outstanding in addition is deep in the pipeline of large-section, when therefore seal fluid flows through from above-mentioned every group of varying-arca channel with certain flow velocity, there are relatively large local pressure loss and certain losing along stroke pressure; Flow through after the above-mentioned varying-arca channel of certain group number, its pressure can be reduced to atmospheric pressure basic identical, thereby can directly be discharged in the seal fluid storage tank that is communicated with atmosphere.
When the gas pressure change in oil pick-up tube, utilize sensor to detect the gas pressure signal that obtains, the running state of control pump after processing through drive controller, thus flow and the pressure of adjusting seal fluid are consistent the pressure of seal fluid and the pressure of pressurized gas substantially.Particularly, when gas pressure reduced, the liquid level of seal fluid can raise, and owing to there being the relatively large backflow buffer cavity of volume, so the liquid level of seal fluid is unlikely to rise rapidly and is back in first sealed case and oil pick-up tube at the first static pulley place; Simultaneously, the signal that the gas pressure that control system obtains according to detection reduces is adjusted the working state of pump, reduces the flow of seal fluid, thereby reduces the fluid pressure in the closed conduit system, makes the liquid level of seal fluid be reduced to normal level.When gas pressure raise, the liquid level of seal fluid can reduce, and owing to there being the relatively large closed conduit of many group volumes, so the liquid level of seal fluid is unlikely to be reduced to rapidly in second sealed case at the second static pulley place; Simultaneously, the signal that the gas pressure that control system obtains according to detection increases is adjusted the working state of pump, increases the flow of seal fluid, thereby improves the fluid pressure in the closed conduit system, makes the liquid level of seal fluid be increased to normal level.
Fig. 2 is used for steel wire rope of oil pumping unit is carried out the system global structure schematic diagram of non-contact sealing according to the second preferred embodiment of the invention mode.As shown in Figure 2, this noncontact seal system on general structure with Fig. 1 in basic identical, the main distinction is to adopt near inlet flow rate meter 63 and near the rate of discharge meters sealing fluid reflow pipe 41 64 sealingfluid inlet pipe 46 to replace the gas pressure sensor 61 in the first sealed case 121 in the first mode of executions.Why above adjustment is made in Detection ﹠ Controling unit 6, mainly to consider when according to the work of gas pressure change SC sigmal control pump, the liquid level height of seal fluid drift in the time of might long-time running occurring under this kind mode, when particularly liquid level reduces gradually, might there be the hidden danger that causes pressurized gas to let out without seal fluid in descending closed conduit 32 from up closed conduit 33.
Therefore, the flow of the seal fluid by utilizing inlet flow rate meter 63 to detect to flow into the closed conduit system in this preferred implementation, utilize simultaneously rate of discharge meter 64 to detect to flow out the flow of the seal fluid of closed conduit system, difference both can reflect the level change of seal fluid 5 in the closed conduit system.Therefore remain zero as long as control entrance and exit sealing fluid difference in flow, the liquid level that can control sealing fluid remains unchanged substantially, thereby can be with pressurized gas safety, be sealed in the closed conduit system reliably.
Fig. 3 a is used for steel wire rope of oil pumping unit is carried out the system global structure schematic diagram of non-contact sealing according to the third preferred embodiment of the invention mode, Fig. 3 b is the worm's eye view of descending closed conduit in sealing system shown in Fig. 3 a.As shown in Fig. 3 a and 3b, this noncontact seal system is basic identical in general structure and the second preferred implementation, the main distinction is to be installed with respectively a plurality of upper saw pulleys 323 in the first closed conduit assembly 32 and the second closed conduit assembly 33, these upper saw pulleys 323 are arranged on wire rope 11 both sides in couples limiting its rocking in the closed conduit assembly, thereby prevent that wire rope 11 and transition pipeline 322 from bumping and rubbing.Thereby the working life that so not only can avoid the wearing and tearing of transition pipeline 322 in During Process of Long-term Operation to improve sealing system, and the internal diameter of transition conduit can be designed less, thereby improve the pressure loss effect of respectively organizing varying-arca channel, improve the sealing reduced pressure capabilities of unit length closed conduit system.Owing to there is no much active forces between upper saw pulley 323 and wire rope 11 under normal circumstances, the power loss of the rope hoisting that therefore causes because of the frictional force between both can be ignored substantially.
Fig. 4 a is used for steel wire rope of oil pumping unit is carried out the system global structure schematic diagram of non-contact sealing according to the four preferred embodiment of the invention mode, Fig. 4 b is the worm's eye view of the descending closed conduit in sealing system shown in Fig. 4 a.As shown in Fig. 4 a and 4b, this noncontact seal system is basic identical in general structure and the 3rd preferred implementation, and the main distinction is that each segment pipe and the transition pipeline 322 in first, second closed conduit assembly 32,33 is spliced by half-watt formula sealing structure.Wherein, in the descending closed conduit 34 of half-watt formula, the larger closed conduit in cross section is tightly connected by descending fixed side half tile structure 341 and descending sealed sides half tile structure 342 and forms; Less two the identical half-watt formula of structure small bore pipelines of transition tube route in cross section 343 consist of, and half-watt formula small bore pipeline 343 is half that the transition pipeline 322 in the 3rd preferred implementation is cut open along axis.In the up closed conduit 35 of half-watt formula, the larger closed conduit in cross section is tightly connected by up fixed side half tile structure 351 and up sealed sides half tile structure 352 and forms; The less transition pipeline in cross section is also to be made of two the identical half-watt formula of structure small bore pipelines 343.In addition, descending fixed side half tile structure 341 of each section and descending sealed sides half tile structure 342 or up fixed side half tile structure 351 and up sealed sides half tile structure 352 all can comprise many group varying-arca channels, so can reduce the assembling work amount, reduce assembly error.The major advantage of this kind mode of execution is to take descending closed conduit 34 or up closed conduit 35 apart under the condition of not removing steel cord structure, so that maintain and replace correlated parts, particularly small bore closed conduit 343 easy to wear.
Fig. 5 is used for steel wire rope of oil pumping unit is carried out the system global structure schematic diagram of non-contact sealing according to the fifth preferred embodiment of the invention mode.The main distinction of this noncontact seal system and above preferred implementation is three aspects.One, the first sealing pipeline assembly 32 is separated into the multistage pipeline by external overall formula closed conduit 361 and the baffle plate 362 of putting some pack modules in the inner, through hole is set on each baffle plate 362 is used for embedding installation transition pipeline 363, separate to maintain a certain distance by baffle position retainer 364 between adjacent baffle plate 362.Wherein, be tightly connected between baffle plate 362 and external overall formula closed conduit 361, the transition pipeline 363 in the first sealing pipeline assembly is fixedly installed in the upside of corresponding baffle plate 362, and the transition pipeline in the second sealing pipeline assembly is installed on the downside of corresponding baffle plate.Its two, increasing between liquid feeding pipeline 44 and descending sealing pipeline system 36 has the second sealing fluid storage tank 45, the second sealing fluid storage tanks 45 to be tightly connected by air communicating pipe road 46 and fluid connection pipeline 47 upper end with descending closed conduit system 36.The position that is communicated with of air communicating pipe road 46 and descending closed conduit system 36 is positioned at descending closed conduit system 36 near top ends, the close top end that the position also is positioned at the second sealing fluid storage tank 45 that is communicated with of air communicating pipe road 46 and the second sealing fluid storage tank 45 guarantees that thus descending closed conduit system 36 interior pressurized gas 20 near tops can freely enter the second sealing fluid storage tank 45.The connectivity part of fluid connection pipeline 47 and the second sealing fluid storage tank 45 is lower than the connectivity part certain altitude of air communicating pipe road 46 and the second sealing fluid storage tank 45, and should there be certain distance the inner chamber bottom surface of the connectivity part of fluid connection pipeline 47 and the second sealing fluid storage tank 45 distance the second sealing fluid storage tank 45; Fluid connection pipeline 47 can guarantee that the seal fluid 5 in the second sealing fluid storage tank 45 can enter descending closed conduit system 36.The bottom opening of the second sealing fluid storage tank 45 and liquid feeding pipeline 44 are tightly connected, and make the liquid in sealing fluid storage tank 42 carry, to enter the second sealing fluid storage tank 45 via liquid feeding pipeline 44 through pump 43.Its three, the sensor in detection system 6 is the liquid level detection device 65 that is installed in the second sealing fluid storage tank 45, the liquid level height information that its detection obtains feeds back to drive controller 62, thereby the running state of control pump 43.
Specific works principle according to the 5th preferred implementation constructed noncontact seal system is as follows: the pressure of pressurized gas 20 impels the seal fluid in descending closed conduit system 36 to circulate downwards, by the variable cross section closed conduit, fluid pressure is reduced gradually.After the liquid level in descending closed conduit system 36 descends, seal fluid in this liquid level and the second sealing fluid storage tank 45 exists liquid level height poor, because there being fluid connection pipeline 47 to be communicated with said two devices, liquid in the second sealing fluid storage tank 45 flows in descending closed conduit system 36 via fluid connection pipeline 47 under Action of Gravity Field automatically, thereby makes the seal fluid height in descending closed conduit system 36.Liquid level height in the second sealing fluid storage tank 45 is reduced to a certain degree, liquid level detection device 65 comes control pump 43 to start working signal feed back to drive controller 62, perhaps liquid level detection device 65 directly touches the operation that enable switch starts pump 43, thereby beginning replenishes seal fluid in the second sealing fluid storage tank 45.Liquid level height in the second sealing fluid storage tank 45 is elevated to a certain degree, liquid level detection device 65 comes control pump 43 to quit work signal feed back to drive controller 62, perhaps the direct stop switch that touches of liquid level detection device 65 stops the operation of pump 43, thereby stops replenishing seal fluid in the second sealing fluid storage tank 45.
In addition, for above all preferred implementations, can also make following concrete improvement.For example, each segment pipe in described first, first, second closed conduit assembly can arrange at each interval, and directly is connected by the transition pipeline at interval location, realizes that thus fluid is communicated with.And for example, consider that the specification of first, second closed conduit assembly and transition pipeline self also has direct impact to integral sealing effect, the net sectional area that in the first closed conduit assembly, in each segment pipe, seal fluid flows through is A
1, the net sectional area that in the second closed conduit assembly, in each segment pipe, seal fluid flows through is A
2, the net sectional area that in the transition pipeline, seal fluid flows through is A
3, and satisfy following relation: A
1〉=10A
3, A
2〉=10A
3
although above only explaining as an example of five kinds of preferred implementations example according to noncontact seal of the present invention system, yet it is evident that, this noncontact seal system only is confined to above structure, for example, movement parts as sealed object can not configure fixed pulley assembly, but carried along specific motion path according to real needs, correspondingly, system can arrange along its transport path according to noncontact seal of the present invention, and comprise at least one various types of closed conduit assembly as mentioned above, corresponding liquid supply assembly is equipped with simultaneously.
Those skilled in the art will readily understand; the above is only preferred embodiment of the present invention; not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. system that is used for movement parts is carried out noncontact seal, this system comprises static pulley group (1), support frame (2), closed conduit unit (3) and liquid supply assembly (4), it is characterized in that:
described static pulley group (1) comprises and is equipped with respectively sealed case (122, 132) the first static pulley (121) and the second static pulley (131), and the 3rd static pulley (141), wherein the first static pulley (121) and the 3rd static pulley (141) are fixedly mounted on the upper backup pad (21) of support frame (2) side by side, the second static pulley (131) is fixedly mounted on lower supporting plate (22) downside of support frame (2) and is between the first and the 3rd static pulley, movement parts as sealed object walks around first successively, then the second and the 3rd static pulley continues to carry,
described closed conduit unit (3) is arranged on the upper of support frame (2), lower supporting plate (21, 22) between, and by the backflow buffer cavity (31) that sets gradually along the transport path of movement parts from the first static pulley (121) to the second static pulley (131) and the first closed conduit assembly (32), and the transport path along movement parts from the second static pulley (131) to the 3rd static pulley (141) and the second closed conduit assembly (33) of arranging is common forms, wherein said first, the second closed conduit assembly (32, the mode of 33) all connecting with the multistage pipeline forms, and be connected by the relatively less transition pipeline of caliber between each segment pipe adjacent one another are,
Described liquid supply assembly (4) is used for being in pipeline topmost to the first closed conduit assembly (32) and carries sealing fluid, keeps the backflow of sealing fluid to be communicated with the second closed conduit assembly (33) simultaneously.
2. the system as claimed in claim 1, is characterized in that, each segment pipe in described first, second closed conduit assembly (32,33) arranges at each interval, and realize by described transition pipeline is connected that thus fluid is communicated with at interval location.
3. the system as claimed in claim 1, it is characterized in that, described first, second closed conduit assembly (32,33) each segment pipe in arranges each other closely, and possessing respectively the dividing plate that has through hole at contact position, described transition pipeline embeds to be arranged on realizes thus in each through hole that fluid is communicated with; Wherein the transition pipeline in the first sealing pipeline assembly is arranged on respectively the upside of corresponding dividing plate, and the transition pipeline in the second sealing pipeline assembly is arranged on respectively the downside of corresponding dividing plate.
4. the system as claimed in claim 1, it is characterized in that, described first, second closed conduit assembly (32,33) each free integral seal pipeline becomes the multistage pipeline with a plurality of barrier partitions of putting in the inner and have a through hole, and described transition pipeline embeds to be arranged on realizes thus in each through hole that fluid is communicated with; Wherein the transition pipeline in the first sealing pipeline assembly is arranged on respectively the upside of corresponding baffle plate, and the transition pipeline in the second sealing pipeline assembly is arranged on respectively the downside of corresponding baffle plate.
5. as the described system of claim 1-4 any one, it is characterized in that, described liquid supply assembly (4) comprises sealing fluid reflow pipe (41), sealing fluid storage tank (42), pump (43) and liquid feeding pipeline (44), wherein be stored in the interior seal fluid of sealing fluid storage tank (42) under the driving of pump (43), then be delivered to the first closed conduit assembly (32) through sealingfluid inlet pipe (46) via the liquid feeding pipeline that is equipped with one-way valve (45) (44) and be in pipeline topmost, keep refluxing by sealing fluid reflow pipe (41) and the second closed conduit assembly (33) simultaneously and be communicated with.
6. as the described system of claim 1-4 any one, it is characterized in that, described liquid supply assembly (4) comprises sealing fluid reflow pipe (41), the first sealing fluid storage tank (42), pump (43), liquid feeding pipeline (44) and the second sealing fluid storage tank (45), wherein be stored in the interior seal fluid (5) of the first sealing fluid storage tank (42) under the driving of pump (43), be delivered to the second sealing fluid storage tank via open end in the liquid feeding pipeline (44) bottom the second sealing fluid storage tank (45), keep refluxing by sealing fluid reflow pipe (41) and the second closed conduit assembly (33) simultaneously and be communicated with, described the second sealing fluid storage tank (45) is provided with air communicating pipe road (46) at the apical position of its sidewall and is used for being connected with the inner pressurized gas of described backflow buffer cavity (31), and the position higher than the bottom is provided with fluid connection pipeline (47) in the lower end of its sidewall, is in pipeline topmost to the first closed conduit assembly (32) thus and carries sealing fluid.
7. system as claimed in claim 5, it is characterized in that, described system also includes pressure type or flow type Detection ﹠ Controling unit, when as pressure type Detection ﹠ Controling unit, it comprises gas pressure sensor (61) and drive controller (62), wherein gas pressure sensor (61) is carried out for the gas pressure in the sealed case (122) that the first static pulley (131) is equipped with and is detected, drive controller (62) is according to flow and the pressure of the corresponding adjusting seal fluid of gas pressure change signal that detects, thereby make the liquid level pressure of seal fluid in the first closed conduit assembly (32) and the gas pressure in sealed case (122) substantially be consistent, and when as flow type Detection ﹠ Controling unit, it comprises entrance flowmeter (63), rate of discharge meter (64) and drive controller (62), wherein inlet flow rate meter (63) is arranged near sealingfluid inlet pipe (46) for detection of the fluid flow that is delivered to the first closed conduit assembly, it is neighbouring for detection of the fluid flow that is back to sealing fluid storage tank (42) that rate of discharge meter (64) is arranged on sealing fluid reflow pipe (41), drive controller (62) is according to flow and the pressure of the corresponding adjusting seal fluid of testing result difference of two flowmeters, thereby make the liquid level pressure of seal fluid in the first closed conduit assembly (32) and the gas pressure in sealed case (122) substantially be consistent.
8. system as claimed in claim 6, it is characterized in that, described system also includes the Detection ﹠ Controling unit, this Detection ﹠ Controling unit comprises liquid level detection device (65) and drive controller (62), wherein liquid level detection device (65) is arranged on second and seals in also storage tank (45) inner for the detector liquid level height, drive controller (62) is according to flow and the pressure of the corresponding adjusting seal fluid of liquid level height variable signal that detects, thereby make the liquid level pressure of seal fluid in the first closed conduit assembly (32) and the gas pressure in sealed case (122) substantially be consistent.
9. as the described system of claim 1-8 any one, it is characterized in that, each segment pipe and transition pipeline in described first, second closed conduit assembly (32,33) are spliced by half-watt formula sealing structure.
10. system that is used for movement parts is carried out noncontact seal, this system comprises closed conduit unit and liquid supply assembly, it is characterized in that:
Described closed conduit unit is along as the transport path of the movement parts of sealed object and arrange, and comprise at least one closed conduit assembly, described closed conduit assembly forms in the mode of multistage pipeline series connection, and is connected by the relatively less transition pipeline of caliber between each segment pipe adjacent one another are;
Described liquid supply assembly comprises liquid feeding pipeline, sealing fluid storage tank and sealing fluid reflow pipe, the seal fluid that is stored in the sealing fluid storage tank is delivered to via liquid feeding pipeline the pipeline that described closed conduit assembly is in the top, and keeping refluxing by sealing fluid reflow pipe and closed conduit assembly simultaneously is communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310012834.XA CN103090010B (en) | 2013-01-14 | 2013-01-14 | Non-contact sealing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310012834.XA CN103090010B (en) | 2013-01-14 | 2013-01-14 | Non-contact sealing system |
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| Publication Number | Publication Date |
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| CN103090010A true CN103090010A (en) | 2013-05-08 |
| CN103090010B CN103090010B (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310012834.XA Expired - Fee Related CN103090010B (en) | 2013-01-14 | 2013-01-14 | Non-contact sealing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111103037A (en) * | 2020-03-04 | 2020-05-05 | 东营职业学院 | Intelligent multifunctional oil field floater liquid level meter |
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|---|---|---|---|---|
| US4260167A (en) * | 1979-09-04 | 1981-04-07 | Engineering Enterprises, Inc. | Well drilling tool |
| JP2006044812A (en) * | 2004-07-30 | 2006-02-16 | Jfe Steel Kk | Method and device for kick-up |
| CN101748996A (en) * | 2009-12-23 | 2010-06-23 | 张墅 | Energy-saving oil pumping mechanism used for oil field |
| JP4906660B2 (en) * | 2007-10-01 | 2012-03-28 | キヤノン株式会社 | Non-contact sealing device |
-
2013
- 2013-01-14 CN CN201310012834.XA patent/CN103090010B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4260167A (en) * | 1979-09-04 | 1981-04-07 | Engineering Enterprises, Inc. | Well drilling tool |
| JP2006044812A (en) * | 2004-07-30 | 2006-02-16 | Jfe Steel Kk | Method and device for kick-up |
| JP4906660B2 (en) * | 2007-10-01 | 2012-03-28 | キヤノン株式会社 | Non-contact sealing device |
| CN101748996A (en) * | 2009-12-23 | 2010-06-23 | 张墅 | Energy-saving oil pumping mechanism used for oil field |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111103037A (en) * | 2020-03-04 | 2020-05-05 | 东营职业学院 | Intelligent multifunctional oil field floater liquid level meter |
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|---|---|
| CN103090010B (en) | 2014-03-12 |
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