CN202937445U - Axial piston pump with piston with metal sealing ring - Google Patents
Axial piston pump with piston with metal sealing ring Download PDFInfo
- Publication number
- CN202937445U CN202937445U CN 201220328352 CN201220328352U CN202937445U CN 202937445 U CN202937445 U CN 202937445U CN 201220328352 CN201220328352 CN 201220328352 CN 201220328352 U CN201220328352 U CN 201220328352U CN 202937445 U CN202937445 U CN 202937445U
- Authority
- CN
- China
- Prior art keywords
- piston
- cylinder
- circumference
- ring
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Sealing Devices (AREA)
Abstract
The utility model relates to an axial piston pump with a piston with a metal sealing ring. The axial piston pump comprises a cylinder body with one or a plurality of cylinder chambers and one or a plurality of piston assemblies, wherein the quantity of the piston assemblies is matched with that of the cylinder chambers. Each piston assembly is provided with the piston, the piston is arranged on each cylinder chamber in a reciprocating motion mode, each piston is provided with one metal sealing ring, the metal sealing ring is coiled on an interweaving sealing piece (CFS) and used for reducing leakage, and the metal sealing ring enables the piston to be concentrically kept in the correspondingly cylinder chamber.
Description
Technical field
The utility model relates in general to axial piston pump, more particularly, relates to the structure of cylinder and piston.
Background technique
Axial piston pump is being known in the art.Typical axial piston pump comprises the cylinder block that is provided with many cylinder thoraxes above, and is arranged in piston assembly in each cylinder thorax in the mode of sliding.Each piston assembly is connected on a wobbler, and this wobbler will rotatablely move and convert the to-and-fro motion of piston to.In the course of the work, by revolving cylinder body itself, perhaps pass through the rotation wobbler when cylinder block keeps static when the wobbler maintenance is static, each piston is reciprocal in each cylinder thorax of cylinder block.Under any pattern, no matter be the revolving cylinder body, or rotation wobbler, gap between cylinder wall and reciprocating piston is all most important to the axial piston pump performance, is to cause one of most important factor of the fatal power loss of axial piston pump because be called as cylinder wall and the leakage between reciprocating piston of internal leakage.
Typical axial piston pump be designed and manufactured as operating temperature range-30 ℃ and+150 ℃ between.The alloy of cylinder block normally is used for the copper base brass family of support function, and the normally more durable chromium base hard steel of the alloy of piston.Use two kinds of different alloys to cause two parts along with the variation of temperature and inside temperature has different thermal expansion speed.Next cause the gap between cylinder wall and piston expand and shrink.At high temperature blocking cylinder and seriously leaking at low temperatures is subject matter.Therefore best clearance is must be enough to avoid under high temperature condition the card cylinder and little be enough to avoid serious gap of leaking under cryogenic conditions greatly.Traditionally, processing and the finishing accuracy of piston and cylinder thorax in manufacture process depended in the realization of best clearance fully.Yet cylinder and piston are along with the time inevitably has wearing and tearing and crack, thus the off-target parameter.
The competitive standard of being brought by gap size and thermal expansion and shrinkage character also causes the challenge that is difficult to make, and comprises that the range of choice of cylinder block and piston material and adaptable heat treatment process is narrow.
The utility model is devoted to by providing a kind of axial piston pump that has with the piston of metallic packing ring to overcome the problems referred to above.
The model utility content
A purpose of the present utility model is to provide a kind of design proposal of axial piston pump, and this pump has the piston with metallic packing ring, therefore, can eliminate the card cylinder and the serious defective of leaking that are caused by the non-best clearance between cylinder wall and piston.Another purpose of the present utility model is to use to coil Sealing (the coiled felt seal that interweaves, be called for short CFS), this is a kind of coiled coil metal sealing that is applied on piston, and the axial piston pump with the piston of metallic packing ring of having of design like this is provided.
The utility model proposes a kind of axial piston pump, comprising: the cylinder block with one or more cylinder thoraxes; And one or more piston assemblys; Wherein the number of the number of piston assembly and cylinder thorax mates; Wherein each piston assembly has a piston, and this piston is arranged in each cylinder thorax in reciprocating mode; And wherein each piston is equipped with a metallic packing ring, is used for reducing leaking, and this piston is remained in corresponding cylinder thorax with one heart.
According to each mode of execution of the present utility model, piston is equipped with flexible coiling in 0.1% scope of the cylinder thorax Sealing CFS that interweaves.Result is that grinding and the glossing of cylinder thorax and piston face just there is no need in the process of making axial piston pump.The range of choice of the alloy of piston and cylinder block broadens.After all, use is coiled the Sealing CFS that interweaves and has been reduced material and processing cost, has strengthened simultaneously the performance of the minimizing leakage of axial piston pump.
Description of drawings
Each mode of execution of the present utility model is described with reference to the accompanying drawings in more detail, wherein;
Fig. 1 has showed the cross-sectional view of a mode of execution of the rotary-type axial piston pump of cylinder block.
Fig. 2 has showed cross-sectional view and the front elevation of an exemplary cylinder block, and this cylinder block disposes the piston that coils the Sealing CFS that interweaves is housed.
Fig. 3 has showed cross-sectional view and the front elevation of an exemplary cylinder block, and this cylinder block disposes the piston without any seal arrangement.
Fig. 4 has showed the front elevation of an exemplary cylinder block, and this cylinder block disposes the piston without any seal arrangement, and it is eccentric focusing between cylinder thorax and piston.
Fig. 5 shows the part ring that can be stamped to form with sheet metal, and its two ends have protruding and recessed dovetail joint, so that when further engaging, make to engage firmly.
Fig. 6 shows two part rings and is stacked together, in order to the protruding dovetail of first portion's ring is inserted in the recessed dovetail of another part ring, consists of spiral coil in order to further engage.
Fig. 7 shows the blank of tubulose sealing of the present utility model, and it is the volute of metal tape coiling.
Fig. 8 is the partial sectional view of complete dynamic seal (packing) of the present utility model, thereby sealing is to have suitable function in internal diameter by grinding blank and external diameter sealing to form.
Fig. 9 shows the part ring with auxiliary imaginary part, is used for explaining the principle of dynamic rotary sealing of the present utility model.
Figure 10 is the partial sectional view that uses the embodiment of complete dynamic rotary sealing of the present utility model.
The explanation of the component of the mark in Fig. 5-10
The part ring that 1-is stamped to form with sheet metal.
The 2-C type partly encircles the nose of dovetail.
The 3-C type partly encircles the recessed end of dovetail.
4-dovetail joint line, this is the result that the C type partly encircles dovetail joint.
5-is partly encircled the helical elastic tube that consists of along further joint of helical trajectory by several C types.
6-is the circumference of engagement shaft not, and the diameter of this circumference is done than the slightly larger in diameter of axle, thereby makes it always away from axle.
The circumference of 7-engagement shaft, the diameter of this circumference are done more smallerly than the diameter of axle, thereby make its always engagement shaft.
The circumference of 8-contact housing, the diameter of this circumference is done more biggerly than the internal diameter of housing, thereby it is always contacted with housing.
9-does not contact the circumference of housing, and the diameter of this circumference is done more smallerly than the internal diameter of housing, thereby makes it always away from housing.
10-housing seal layer, its external diameter are the circumference of contact housing, and its internal diameter is the circumference of engagement shaft not.
11-displacement absorbed layer, its external diameter are the circumference that does not contact housing, and its internal diameter is the circumference of engagement shaft not.
12-shaft sealing layer, its external diameter is the circumference that does not contact housing, and its internal diameter is the circumference of engagement shaft.
The 13-axle.
The arrow of 14-indication axle sense of rotation.
The arrow of indicating ring expansion direction when 15-launches when Simmer ring.
The imaginary pin of 16-, the bad rotation of this pin block axis sealing.
The 17-housing.
The internal diameter of 18-housing.
19-is inserted in annular groove to keep the snap ring of positioning ring.
20-keeps the positioning ring of bad assembly of sealing.
21-compression ring, this compression ring promote the source of bad assembly of sealing and encircle to keep sealing rings all in bad assembly close contact each other, leak thereby stop between each ring.
22-provides the Compress Spring of compressive force for compression ring.
The external diameter of 23-running shaft.
The black box that 24-is complete.
The 25-annular groove.
Embodiment
In the following description, the design proposal that has with the axial piston pump of the piston of metallic packing ring illustrates as preferred embodiment.For a person skilled in the art, obviously only otherwise deviate from scope of the present utility model and thought, just can make various improvement, comprise increasing and/or replacement.Can ignore specific details, in order to can not make the model utility indigestion; But disclosure is write to such an extent that can make those skilled in the art not need undue experimentation can implement the instruction here.
With reference to Fig. 1.What show is the cross-sectional view of a mode of execution of the rotary-type axial piston pump of cylinder block.This axial piston pump comprises at least one pump case that holds all pump parts 01.Pump case 01 can be arranged on main frame with bolt 02.Valve plate 08 and wobbler 07 are assembled in housing 01, and with bolt 05 with bolt 06 is fastening puts in place.The cylinder block 03 that the inside has a cylinder thorax 09 is arranged in pump case 01, on bearing 04.Cylinder block 03 is pressed to valve plate 08 by thrust spring 14, keeps valve plate 08 firmly to contact with cylinder block 03.Piston seal 11, namely CFS is arranged on piston 10.Piston seal 11 guarantees between cylinder thorax 09 and piston 10 it is zero leakage or near zero leakage, thereby realizes energy-conservation and higher pump performance.
With reference to Fig. 2 and Fig. 3.More clearly shown CFS piston seal 11 in cross-sectional view in Fig. 2.As seeing in the front elevation in Fig. 2, CFS piston seal 11 also with cylinder thorax 09 in piston 10 keep perfect concentric.By keeping equally distributed contact between two friction surfaces, guaranteeing has the longer life-span between two contact segments.By contrast, as shown in 15 in Fig. 3, there is no the piston of the piston seal secundly that swings that might shake from side to side in cylinder thorax 09, thereby can cause serious leakage because of excessive space 16.
With reference to Fig. 1.Piston 10 is outwards exerted pressure from cylinder block 03 by piston spring 12.This exposed ends of guaranteeing piston 10 of exerting pressure has firmly with wobbler 07 by ball-and-socket joint 13 and contacts.When cylinder block 03 rotation, the exposed ends of piston is compressed to follow the surface of wobbler 07.Due to wobbler 07 and spin axis at angle, so piston to-and-fro motion vertically, thus drive pump action.
The mode of execution of CFS is called the sealing of helical spring cast dynamic rotary, and its exemplary application is disclosed in the 10-2006-0031762 korean patent application.Partly encircle the helical spring cast dynamic rotary sealing of formation with the C type, these C types partly encircle by the dovetail joint method and are bonded together.
Category of the present utility model drops in the dynamic prevention technology of leakage, when the pressure rise in the rotary compression system, inevitably can occur between static housing and running shaft leaking.
The dynamic rotary sealing that is used on the screw type compression system is called as " mechanical seal ".Mechanical seal is comprised of six parts at least: rotor, rotor body, stator disc, rotor disk, rotor disk spring and the sealing of rotor body disc.If in these parts, any one is out of order, whole sealing function just lost efficacy.Stator disc and rotor disk are to rotate by contact friction the parts of carrying out actual sealing function under pressure.These two parts must have high-wear resistance and low-frictional force concurrently.They must be with the fastest as far as possible speed heat radiation.Surface area can be regulated, in order to little area of contact is arranged, thereby little frictional heat is arranged, but little area can cause wearing and tearing quickly.High abrasion resisting material has high frictional force, and low friction material has low wear resistance.If they use the high abrasion resisting material manufacturing, in order to the long life-span is arranged, frictional heat will affect the quality of the medium that is in contact with one another, and even causes in some cases fire.
Two surface of contact in mechanical seal are under pressure and frequent friction, therefore they all can have wearing and tearing in all cases, or even the wearing and tearing of submicron order, but when the sub-micron wearing and tearing were not compensated along with wearing and tearing in all cases, the sub-micron wearing clearance always caused whole seal failure.
In other words, one in contact disc, rotating disc must be moved towards supporting tray, stationary disk, with compensate for wear.This means that when solid of rotation rotated, rotating disc must advance towards stationary disk vertically on solid of rotation.Rotating disc must be able to slide on solid of rotation, constantly to move towards stationary disk.Therefore having another place to stop between rotating disc and solid of rotation leaks.
Rotating disc is very little because of axially movable distance that disc wearing and tearing cause on solid of rotation, 1 year also with regard to several millimeters, therefore the sealing between rotating disc and solid of rotation can realize by simple RUBBER O shape ring, this mode is more cheap, also can realize by metal bellows, this mode performance is better.In brief, the practical problem of rotation dynamic seal (packing) of the prior art in the sealing between rotating disc and rotor body, is not only on contact disc.
The RUBBER O shape ring that is inserted between rotating disc and rotor body can be crooked in high temperature media, and can be extruded under high-pressure medium, and can be corroded in Korrosionsmedium, but have no idea to ignore it.
Metal bellows is more expensive, is three times of whole mechanical seal sometimes, and metal bellows makes structure more complicated, and this can hinder thin and compact design, and this is extremely important in precision optical machinery.
Final target is to produce single-piece rotation dynamic seal (packing), sealing is compact, sealability is higher, more cheap, and maintenance cost is lower, and the rotation dynamic seal (packing) system that is commonly referred to as mechanical seal of related domain has so many parts, therefore inevitably have the labyrinth that is mutually related, cost of production is expensive, and maintenance cost is higher, and the life-span is shorter.
Fig. 5 has showed that the C type partly encircles 1, and it is basic source of the present utility model ring.Part is encircled 1 and must be stamped to form by press, perhaps utilizes sheet billet to pass through contour cutting technique manufacturing such as laser cutting or spark-erosion wire cutting, so that part is encircled completely parallel two faces of 1.It is the ring that is cut off of a part of ring that the C type partly encircles 1, in order to allow a plurality of part rings further engage by encircle the protruding dovetail 2 that forms on 1 two ends and recessed dovetail 3 in part.The value of cut angle should correspondingly according to diameter be determined.
Fig. 6 has showed that two parts encircle 1 and encircle that 1 protruding dovetail 2 and next part are encircled 1 recessed dovetail 3 and the method that further engages by first portion.
Fig. 7 showed by part and encircled the complete helical elastic tube 5 that 1 further joint forms, and these dovetail joint lines 4 must be after engaging by welding or brazing be permanently fixed.Starting point on complete helical elastic tube 5 has been showed protruding dovetail 2, and terminal point has been showed recessed dovetail 3.When helical elastic tube 5 consists of by partly encircling 1 further joint, dovetail joint line 4 should be distributed on this tube-surface with misplacing, dislocation and partly to encircle 1 cut angle the same large, so dovetail joint line 4 can fully be distributed on the surface of pipe, avoids unstable binding site overlapping.
Fig. 8 has showed the partial sectional view of black box 24 of the present utility model, and the sealing assembly is that the sealing of complete model utility is bad.Black box 24 produces 4 different diameters by grinding internal diameter and external diameter and completes, and two diameters are on the inboard of helical elastic tube 5, and another two diameters are on the outside of helical elastic tube 5.The less diameter of the internal diameter of black box 24 is called as the circumference 7 of engagement shaft, and this circumference is done littlely by approximately 0.5% than the external diameter of axle 23, is inserted into black box 24 when interior with convenient axle 13, always tightly contacts with axle 13.The larger diameter of the internal diameter of black box 24 is called as the not circumference 6 of engagement shaft, and this circumference is done more biggerly than the external diameter of axle 23, to prevent at any time the not external diameter of circumference 6 engagement shafts 23 of engagement shaft.The larger diameter of the external diameter of black box 24 is called as the circumference 8 that contacts housing, this circumference is done than the internal diameter of housing 18 about 0.5%, be assembled into housing 17 when interior with convenient black box 24, the circumference 8 that keeps in touch housing always tightly contacts with the internal diameter of housing 18.The less diameter of the external diameter of black box 24 is called as the circumference 9 that does not contact housing, and this circumference is done more smallerly than the internal diameter of housing 18, with the internal diameter of the circumference 9 contact housings 18 that prevent from any time not contacting housing.The purpose of making the circumference of these 4 different-diameters is in 3 different functional layers of the interior structure of black box 24.First layer is called as housing seal layer 10, and it is the accumulation of casing ring, and its external diameter is the circumference 8 of contact housing, and internal diameter is the circumference 6 of not engagement shaft.The function of housing seal layer is to block the internal diameter of housing 18 and the leakage between black box 24, and is used for this layer of structure so that the number of the ring of sealability the best should be determined according to different sizes by the artificer.The second layer is called as shaft sealing layer 12, and it is the bad accumulation of shaft sealing, and its external diameter is the circumference 9 that does not contact housing, and internal diameter is the circumference 7 of engagement shaft.The function of shaft sealing layer is to block the external diameter of axle 23 and the leakage between black box 24, and is used for this layer of structure so that the number of the ring of sealability the best should be determined according to different sizes by the artificer.The 3rd layer is called as displacement absorbed layer 11, and it is the accumulation of floating ring, and its external diameter is the circumference 9 that does not contact housing, and internal diameter is the circumference 6 of not engagement shaft.Displacement absorbed layer 11 is configured between housing seal layer 10 and shaft sealing layer 12, with the eccentric vibrating of absorption axes, also by along with use is worn and torn, thereby absorbs the dimensional changes of whole system.
Fig. 9 has showed sealing principle of the present utility model.Because these 3 different functional layers are configured on the single piece of metal band, any power that therefore is applied on black box 24 any point can affect whole black box 24 immediately.When black box 24 firmly is inserted into housing 17 when interior, black box 24 is fixed in housing 17 tightly, because the outermost diameter of black box 24 is circumference 8 of contact housing, this circumference is than the internal diameter of housing 18 large 0.5%.When housing seal layer 10 was tightly fixed on housing 17, whole black box 24 was fixed in housing 17, and shaft sealing layer 12 is also like this.The inside diameter of black box 24 is internal diameters of shaft sealing layer 12, it is also the circumference 7 of engagement shaft, this circumference is done littlely by approximately 0.5% than the external diameter of axle 23, if therefore axle 13 firmly is inserted in shaft sealing layer 12, so whole shaft sealing layer 13 is certain to adhere to tightly on axle 13.If axle 13 begins rotation, shaft sealing layer 12 also begins with axle 13 rotations so, but the housing seal layer 10 that is fixed on tightly in housing 17 can stop 12 rotation of shaft sealing layer.
This situation is identical with the situation of Fig. 9, and Fig. 9 has showed that the rotating force that a part of shaft sealing layer 12 is encircled by axle 13 will begin rotation, show the barrier effect of housing seal layer 10 by imaginary blocking pin.The diameter 23 of circumference 7 retainer shafts of engagement shaft, but the direction rotation that axle 13 begins to arrow 14, blocking pin 16 stops ring 12 rotations simultaneously, and then the frictional force between the diameter 23 of the circumference 7 of engagement shaft and axle is transformed into to the direction of arrow 15 and opens part ring 12.Encircle 12 when being opened by the power of arrow 15 directions when part, the contact between ring 12 and axle 13 disconnects, and in other words, no longer includes contact this moment here.No longer contact means does not have frictional force to produce, and therefore encircles 12 the end of opening, and its home position of rebounding.Ring 12 its home position of rebounding means ring 12 and the contacting of axle 13, and next frictional force is opened ring 12 again.Opening between ring 12 and axle 13 can be one millimeter 1,000,000/, no matter how little the opening value is because opening is opened to, as long as the distance of opening is enough to eliminate contact.Therefore encircling 12 switching can occur 1,000,000 times a second, in other words, opened gap can be also one millimeter 1,000,000/, by this gap, leakage can not be arranged in microsecond.This situation is identical with the static sealing of General Purpose Rubber O shape ring, in fact never disconnects with contacting in the rotary course of axle 13 of axle 13 because encircle 12.This situation is helical spring and is inserted into the unique phenomenon that occurs between rotation pole in spring, and this situation should be called contact non-contact situation.This contact non-contact phenomenon long ago just is used on helical spring over run clutch, but the utility model is used in this phenomenon in dynamic seal (packing) for the first time.
Figure 10 is typical accompanying drawing, and it has showed the sectional view of the complete dynamic rotary sealing of using black box 24.Must there be some parts that black box 24 is remained in cylinder 17, comprise positioning ring 20 and be inserted in the interior snap ring 19 of annular groove 25.Also be provided with compression ring 21, be used for each source ring is pushed together, by the spring force of the Compress Spring 22 in the hole that is inserted into structure on compression ring 21, stop the leakage between each source ring.
Above-mentioned explanation of the present utility model provides for the purpose that illustrates and illustrate.Do not mean exhaustive or the utility model is restricted to disclosed accurate form.Many improvement and change are apparent for those of ordinary skills.
Selecting and describing each mode of execution is in order to explain better principle of the present utility model and its practical application, thereby guarantees that other those of ordinary skill of related domain can understand each mode of execution and the various improvement of the suitable application-specific of expecting of the present utility model.Scope of the present utility model is limited by appending claims and its equivalent form of value.
Claims (3)
1. an axial piston pump, is characterized in that, comprising:
A cylinder block with one or more cylinder thoraxes; And
One or more piston assemblys;
Wherein the number of the number of piston assembly and cylinder thorax mates;
Wherein each piston assembly has a piston, and this piston is arranged in each cylinder thorax in reciprocating mode; And
Wherein each piston is equipped with a metallic packing ring, is used for reducing leaking, and this piston is remained in corresponding cylinder thorax with one heart.
2. axial piston pump according to claim 1, is characterized in that, the metallic packing ring that wherein is contained on each piston is to coil the Sealing CFS that interweaves.
3. axial piston pump according to claim 1, is characterized in that, also comprises a wobbler; This wobbler is connected to each piston assembly, compaction piston and rotates at angle with the surface of following wobbler, with the spin axis of cylinder block and make the to-and-fro motion vertically of each piston.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/405,234 US8627758B2 (en) | 2006-04-07 | 2012-02-25 | Axial piston pump with pistons having metallic sealing rings |
| US13/405,234 | 2012-02-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202937445U true CN202937445U (en) | 2013-05-15 |
Family
ID=48326844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220328352 Expired - Lifetime CN202937445U (en) | 2012-02-25 | 2012-07-06 | Axial piston pump with piston with metal sealing ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202937445U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015176649A1 (en) * | 2014-05-20 | 2015-11-26 | Neo Mechanics Limited | A reciprocating internal combustion engine piston-cylinder-connecting rod assembly |
| CN107110357A (en) * | 2014-07-28 | 2017-08-29 | 昱曦机械高新科技有限公司 | Manufacture the method and device of helical spring type seal |
| CN108474478A (en) * | 2015-12-23 | 2018-08-31 | 特瑞堡密封系统德国有限公司 | Rotary sealing system and rotating seal with helical spring sealing element |
| CN109312862A (en) * | 2016-03-15 | 2019-02-05 | 昱曦机械高新科技有限公司 | A kind of sealing element for barrel-shaped cylinder |
| CN113825916A (en) * | 2019-03-09 | 2021-12-21 | 高满锴 | Shaft-cylinder assembly for high temperature operation |
-
2012
- 2012-07-06 CN CN 201220328352 patent/CN202937445U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015176649A1 (en) * | 2014-05-20 | 2015-11-26 | Neo Mechanics Limited | A reciprocating internal combustion engine piston-cylinder-connecting rod assembly |
| TWI564494B (en) * | 2014-05-20 | 2017-01-01 | 昱曦機械高新科技有限公司 | A reciprocating internal combustion engine piston-cylinder-connecting rod assembly |
| CN107110357A (en) * | 2014-07-28 | 2017-08-29 | 昱曦机械高新科技有限公司 | Manufacture the method and device of helical spring type seal |
| CN107110357B (en) * | 2014-07-28 | 2019-02-22 | 昱曦机械高新科技有限公司 | Manufacture the method and device of helical spring type sealing element |
| CN108474478A (en) * | 2015-12-23 | 2018-08-31 | 特瑞堡密封系统德国有限公司 | Rotary sealing system and rotating seal with helical spring sealing element |
| CN109312862A (en) * | 2016-03-15 | 2019-02-05 | 昱曦机械高新科技有限公司 | A kind of sealing element for barrel-shaped cylinder |
| CN109312862B (en) * | 2016-03-15 | 2020-09-04 | 昱曦机械高新科技有限公司 | Sealing element for barrel-shaped cylinder |
| CN113825916A (en) * | 2019-03-09 | 2021-12-21 | 高满锴 | Shaft-cylinder assembly for high temperature operation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103429936A (en) | Axial piston pump with pistons having metallic sealing rings | |
| CN103917809A (en) | Coiled felt seal(CFS) sealed piston of hydraulic cylinder | |
| CN202937798U (en) | Hydraulic cylinder assembly | |
| CN202937445U (en) | Axial piston pump with piston with metal sealing ring | |
| CN201173295Y (en) | Contact type mechanical end-face leakage-free magnetic sealing member | |
| CN110023656B (en) | Sliding assembly | |
| CN102362109B (en) | Gland seal device | |
| US20100171269A1 (en) | Monitoring of a Sealing Arrangement, Particularly of a Gas Compressor or Gas Expander | |
| US6293555B1 (en) | Secondary seal for non-contacting face seals | |
| US4436317A (en) | Cassette seal having a counterring free from unrelieved internal stress | |
| RU2007139702A (en) | IMPROVED DRIVING UNIT ON A FLUID MEDIUM FOR APPLICATION INSIDE A TURBO MACHINE | |
| CN202937392U (en) | Fuel injection pump | |
| CN106051162A (en) | Shaft lever floating sealing device and application method | |
| CN203702642U (en) | Low-temperature large-shaft-diameter dry gas sealing device for centrifugal compressor | |
| CN101328815B (en) | Free ring contact type gapless sealing technology | |
| CN110735795B (en) | Annular sealing structure for rotor end face of Roots blower | |
| CN107191596A (en) | A kind of non-contact mechanical seal and the seal assembly for preventing lubrication leakage | |
| CN203067841U (en) | Strut-type control valve | |
| JP3305196B2 (en) | Shaft sealing device | |
| CN104421429A (en) | Self-adjusting pressure type rigid ring for mechanical seal | |
| CN210566259U (en) | Anchor-shaped dry gas sealing mechanism | |
| CN115126875B (en) | Shaft end mechanical sealing device suitable for powder conveying equipment | |
| CN219221259U (en) | Radial double-end-face mechanical sealing device | |
| CN209145796U (en) | A kind of mechanically-sealing apparatus for refrigeration compressor | |
| SU1057728A1 (en) | End face seal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |
|
| CX01 | Expiry of patent term |