CN103307020A - Two-way floating type mouth-ring sealing device of centrifugal pump - Google Patents
Two-way floating type mouth-ring sealing device of centrifugal pump Download PDFInfo
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- CN103307020A CN103307020A CN201310247407XA CN201310247407A CN103307020A CN 103307020 A CN103307020 A CN 103307020A CN 201310247407X A CN201310247407X A CN 201310247407XA CN 201310247407 A CN201310247407 A CN 201310247407A CN 103307020 A CN103307020 A CN 103307020A
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Abstract
The invention discloses a two-way floating type mouth-ring sealing device of a centrifugal pump. A floating wearing ring precompresses through a floating compression ring and springs, and then is fixed on a fixed neck ring by a hexagonal nut, a fixed compression ring and inside hexagonal bolts to form the two-way floating type mouth-ring sealing device. The fixed neck ring and the floating wearing ring are in sawtoothed sealing structures, so that leakage losses can be further reduced; a larger gap is formed between the fixed neck ring and an internal wall of an impeller, and a smaller gap is formed between the floating wearing ring and an external wall of the impeller, so that a shape position deviation caused by an assembling error can be compensated by a self-centering function of the floating wearing ring; the leakage losses at a mouth ring can be reduced effectively; the excessive abrasion arising from a smaller gap and a noise generated by friction can be eliminated effectively; the efficiency of the centrifugal pump is improved greatly; the abrasion between the mouth ring and the impeller is avoided; and a two-way sealing ring structure can effectively balance the stress of the internal wall and the external wall of the impeller, so that the stress of the impeller can become more uniform, and more stable operation can be achieved.
Description
Technical field
The invention belongs to centrifugal pump manufacturing technology field, particularly the floating type mouth ring sealing device of a kind of centrifugal pump two pass.
Background technique
The mode that present centrifugal pump impeller and control ring seal adopt all is the fixed control ring seal structure of single track mostly, and the radial clearance that is processed into 0.3～0.5mm between impeller and choma cooperates, this method can play certain sealing effect, but because the single track choma is stationary structure, because the shape position error that processing and assembling bring tends to approach, even can surpass the radial clearance of reserving, and cause the friction of impeller and choma, bring the wearing and tearing of impeller and choma, simultaneously, the stuck phenomenon that also occurs impeller easily.In addition, the single track sealing so leakage loss can be bigger, can influence the efficient of water pump because impeller has only sealing between choma.Among the US Patent No. 4208166A " Adjustable wear ring for a centrifugal pump " a kind of adjustable wear ring sealing configuration has been proposed; seal ring adopts zigzag structure; this structure has the better seal performance; but because the adjusting of wear ring need be carried out spacing adjusting by position-limitting pin; each adjusting all needs shutdown operation; and the common gap of this single track sealing configuration is less, so still there is friction between impeller and the wear ring.Chinese patent 200780002190.9 " the flexible float ring seal device that is used for rotodynamic pump " has proposed a kind of flexible float ring sealing structure of rotodynamic pump, in the pump operation process, in circular channel, float to reduce gap between impeller and the flexible loop to reduce leakage loss by flexible loop, there is friction between impeller in this structure and the flexible loop, in the long-play process because the wearing and tearing of impeller or flexible loop, make the gap to strengthen, and then aggravated leakage loss.
Summary of the invention
Technical problem to be solved by this invention is, produces owing to radial clearance is too small between the existing fixed choma of single track and the impeller that appearance rubs and stuck phenomenon between impeller and the sealing opening ring, simultaneously, the leakage loss of single track sealing is bigger, long-time wearing and tearing along with impeller and choma, the gap can constantly increase, and leakage loss can further increase, and the efficient of pump can further descend.For solving the problems of the technologies described above, the floating type mouth ring sealing device of a kind of two pass is proposed, the floating type mouth ring sealing device of this two pass is simple in structure, easy for installation, the outer ring floating ring has automatically than heart function, friction and the stuck phenomenon of impeller and choma have been solved, being used of inner and outer rings effectively reduces leakage loss, improved the efficient of centrifugal pump.
Technological scheme of the present invention is: the floating type mouth ring sealing device of a kind of centrifugal pump two pass comprises fixedly neck ring, the wear ring that floats, unsteady pressure ring, fixed pressure ring, spring and hexagon socket head cap screw.All part material selects stainless steel 304 as original base material.At first, determine the fixedly physical dimension of neck ring, this size is determined that by the size of pump housing choma groove in order to reduce the leakage loss of impeller inlet inwall, fixedly the neck ring sealing surface adopts zigzag fashion, forms first seal structures with the impeller inwall; Then, according to the fixing size of neck ring, determine the size of unsteady wear ring, the wear ring sealing surface that floats adopts zigzag fashion, the unsteady wear ring that designs is installed on fixedly in the neck ring, forms the sealing of second road with the impeller outer wall, the pressure ring that will float again is positioned on the wear ring that floats, simultaneously, spring is enclosed within respectively on the pressure ring circumference that floats on equally distributed 4 little supporting posts; The fixed pressure ring that will have 4 through holes then is installed on the pressure ring that floats, and by 4 supporting posts on the pressure ring that floats fixed pressure ring is positioned, and spring is in floats between pressure ring and the fixed pressure ring; By hexagon socket head cap screw fixed pressure ring is fixed on fixedly on the neck ring at last, spring is subjected to certain pressure, be in compressive state, produced resiliently deformable, this resilient force makes and floats between pressure ring and the unsteady wear ring on unsteady pressure ring and unsteady wear ring, and unsteady wear ring and fixedly produce certain frictional force between the neck ring, this frictional force can overcome the gravity of the wear ring self that floats, and the wear ring that guarantees to float is not having to be in interim state of rest under the external force effect.Assembled in sequence by above function part has realized a floating type mouth ring sealing device of two pass.Wherein, float wear ring with certain adjustable clearance is fixedly arranged between the neck ring, be used for the domain of walker of the unsteady wear ring of control.Fixedly have 4 circumference mounting hole that evenly distributes on the neck ring outer ring, be used for integral sealing means is fixed in the choma groove of the pump housing.
Fixedly neck ring is the zigzag fashion sealing configuration, adopts the two pass sawtooth, and the gap between the sawtooth is 4mm; Fixedly neck ring becomes 0.5mm with the theoretical monolateral gap design of impeller inwall, and impeller inwall and the fixedly friction of neck ring can effectively be avoided in bigger gap, form first seal structures; Fixedly have 4 uniform M4 tapped holes on the neck ring, be used for the final locking of fixed pressure ring; Fixedly the neck ring outer ring has 4 circumferential equally distributed Φ 6 mounting holes, is used for the final connection of integral sealing means and pump housing choma groove.
Unsteady wear ring is the zigzag fashion sealing configuration, adopts the two pass sawtooth, and the gap between the sawtooth is 4mm, and the wear ring that floats becomes 0.2mm with the theoretical monolateral gap design of impeller outer wall, and less clearance can reduce leakage rate effectively, reduces leakage loss; Simultaneously, float assembling and the machining error of wear ring impeller and whole rotor system under the effect of impeller, carry out self-aligning, efficiently solve because the impeller that little gap causes and the friction between the unsteady wear ring have improved impeller and the working life of the wear ring that floats.Described unsteady wear ring and fixedly the radially adjustable clearance G between the neck ring can be designed to 0.5～1mm according to impeller size, as when adjustable clearance G is decided to be 0.5mm, it is 0.5mm that monolateral maximum can compensate surplus, add the theoretical monolateral gap 0.2mm between impeller and the unsteady wear ring, the monolateral maximum adjustable gap of unsteady wear ring reaches 0.7mm, effectively compensate the shape position error that causes owing to assembling, and eliminated the friction between impeller b and the unsteady wear ring.
Float pressure ring by forming radial location between equally distributed 4 supporting posts of circumference and the fixed pressure ring, and 4 supporting posts adopt 7 grades of tolerance hole: H7 and axle with the cooperating of 4 positioning holes on the fixed pressure ring: h7 carries out Spielpassung, guarantees assembling function; Simultaneously, the pressure ring that floats has carried out axially locating by spring and fixed pressure ring, guarantees the pressure ring axial dimension that floats.Seal arrangement, the elastic force that provides by spring makes the certain frictional force of formation between wear ring and the unsteady pressure ring of floating, and to overcome the gravity of the wear ring self that floats, the wear ring that guarantees to float is not having to be in interim state of rest under the external force effect; When because the radial effect masterpiece that causes of beating during the rotation of impeller when being used for floating wear ring, unsteady wear ring can carry out automatically than the heart under its effect, change initial position, adjust to best running position, effectively avoid the friction of unsteady wear ring and impeller.
The invention has the beneficial effects as follows:
1, the fixed choma structure of original single track is made into the floating type choma structure of two pass, realize the sealing in the outside in the impeller better;
2, two pass zigzag fashion sealing configuration effectively reduces leakage loss, has improved the efficient of centrifugal pump;
3, friction and the stuck phenomenon between impeller and the choma effectively eliminated in the design of floating type wear ring, prolonged the working life of part;
4, the floating type choma device of two pass adopts Bolt Connection, can mount and dismount fast;
What 5, the double sealing ring structure also can active balance impeller inside and outside wall is stressed, makes impeller stressed more even, reaches more stable operation.
Description of drawings
Fig. 1 is the structural profile schematic representation of the floating type mouth ring sealing device of a kind of two pass of the present invention.
Fig. 2 is the installation overall schematic of Fig. 1.
Fig. 3 for the installation details enlarged diagram of Fig. 1, be the details enlarged view in Fig. 2 centre circle.
Fig. 4 is each parts enlarged view of the floating type mouth ring sealing device of two pass.
Fig. 5 is fixing neck ring structural representation.
Fig. 6 is the wear ring structural representation that floats.
Fig. 7 is the pressure ring structure left view that floats.
Fig. 8 is the fixed pressure ring structural representation.
Among the figure: 1. fixing neck ring, the wear ring that 2. floats, the pressure ring that 3. floats, 4. fixed pressure ring, 5. spring, 6. hexagon socket head cap screw, the floating type mouth ring sealing device of a. two pass, b. impeller.
Embodiment
The floating type mouth ring sealing device of a kind of centrifugal pump two pass comprises fixedly neck ring, the wear ring that floats, unsteady pressure ring, fixed pressure ring, spring and hexagon socket head cap screw.All part material selects stainless steel 304 as original base material.At first, determine the fixedly physical dimension of neck ring, this size is determined that by the size of pump housing choma groove in order to reduce the leakage loss of impeller inlet inwall, fixedly the neck ring sealing surface adopts zigzag fashion, forms first seal structures with the impeller inwall; Then, according to the fixing size of neck ring, determine the size of unsteady wear ring, the wear ring sealing surface that floats adopts zigzag fashion, the unsteady wear ring that designs is installed on fixedly in the neck ring, forms the sealing of second road with the impeller outer wall, the pressure ring that will float again is positioned on the wear ring that floats, simultaneously, spring is enclosed within respectively on the pressure ring circumference that floats on equally distributed 4 little supporting posts; The fixed pressure ring that will have 4 through holes then is installed on the pressure ring that floats, and by 4 supporting posts on the pressure ring that floats fixed pressure ring is positioned, and spring is in floats between pressure ring and the fixed pressure ring; By hexagon socket head cap screw fixed pressure ring is fixed on fixedly on the neck ring at last, spring is subjected to certain pressure, be in compressive state, produced resiliently deformable, this resilient force makes and floats between pressure ring and the unsteady wear ring on unsteady pressure ring and unsteady wear ring, and unsteady wear ring and fixedly produce certain frictional force between the neck ring, this frictional force can overcome the gravity of the wear ring self that floats, and the wear ring that guarantees to float is not having to be in interim state of rest under the external force effect.Assembled in sequence by above function part has realized a floating type mouth ring sealing device of two pass.Wherein, float wear ring with certain adjustable clearance is fixedly arranged between the neck ring, be used for the domain of walker of the unsteady wear ring of control.Fixedly have 4 circumference mounting hole that evenly distributes on the neck ring outer ring, be used for integral sealing means is fixed in the choma groove of the pump housing.
Fixedly neck ring is the zigzag fashion sealing configuration, adopts the two pass sawtooth, and the gap between the sawtooth is 4mm; Fixedly neck ring becomes 0.5mm with the theoretical monolateral gap design of impeller inwall, and impeller inwall and the fixedly friction of neck ring can effectively be avoided in bigger gap, form first seal structures; Fixedly have 4 uniform M4 tapped holes on the neck ring, be used for the final locking of fixed pressure ring; Fixedly the neck ring outer ring has 4 circumferential equally distributed Φ 6 mounting holes, is used for the final connection of integral sealing means and pump housing choma groove.
Unsteady wear ring is the zigzag fashion sealing configuration, adopts the two pass sawtooth, and the gap between the sawtooth is 4mm, and the wear ring that floats becomes 0.2mm with the theoretical monolateral gap design of impeller outer wall, and less clearance can reduce leakage rate effectively, reduces leakage loss; Simultaneously, float assembling and the machining error of wear ring impeller and whole rotor system under the effect of impeller, carry out self-aligning, efficiently solve because the impeller that little gap causes and the friction between the unsteady wear ring have improved impeller and the working life of the wear ring that floats.Described unsteady wear ring and fixedly the radially adjustable clearance G between the neck ring can be designed to 0.5～1mm according to impeller size, as when adjustable clearance G is decided to be 0.5mm, it is 0.5mm that monolateral maximum can compensate surplus, add the theoretical monolateral gap 0.2mm between impeller and the unsteady wear ring, the monolateral maximum adjustable gap of unsteady wear ring reaches 0.7mm, effectively compensate the shape position error that causes owing to assembling, and eliminated the friction between impeller b and the unsteady wear ring.
Float pressure ring by forming radial location between equally distributed 4 supporting posts of circumference and the fixed pressure ring, and 4 supporting posts adopt 7 grades of tolerance hole: H7 and axle with the cooperating of 4 positioning holes on the fixed pressure ring: h7 carries out Spielpassung, guarantees assembling function; Simultaneously, the pressure ring that floats has carried out axially locating by spring and fixed pressure ring, guarantees the pressure ring axial dimension that floats.Seal arrangement, the elastic force that provides by spring makes the certain frictional force of formation between wear ring and the unsteady pressure ring of floating, and to overcome the gravity of the wear ring self that floats, the wear ring that guarantees to float is not having to be in interim state of rest under the external force effect; When because the radial effect masterpiece that causes of beating during the rotation of impeller when being used for floating wear ring, unsteady wear ring can carry out automatically than the heart under its effect, change initial position, adjust to best running position, effectively avoid the friction of unsteady wear ring and impeller.
In conjunction with Fig. 1, the floating type mouth ring sealing device of two pass of the present invention comprises fixedly major parts such as neck ring 1, the wear ring 2 that floats, unsteady pressure ring 3 and fixed pressure ring 4, also comprise the spring of adjusting for the axial float position 5, the final integral assembling is fixed by hexagon socket head cap screw 6.Float wear ring 2 and fixedly the radially adjustable clearance G between the neck ring 1 can design according to the size of impeller, recommendation is 0.5～1mm usually.
In conjunction with Fig. 2, Fig. 3, the floating type mouth ring sealing device a of two pass forms the double sealing structure by in bolt installation and the pump case with impeller b.
In conjunction with Fig. 4, the assemble sequence of the floating type mouth ring sealing device of two pass is fixing neck ring 1, the wear ring 2 that floats, unsteady pressure ring 3, spring 5, fixed pressure ring 4 and hexagon socket head cap screw 6.
In conjunction with Fig. 5, Fig. 6, fixedly neck ring 1 inner ring surface is zigzag fashion, compares with smooth surface, and the sealing effect of serrated face is better, mainly due to the effective speed of slowing down fluid of serrated face, and then reduces the leakage rate of unit time inner fluid; Fixedly neck ring 1 has 4 tapped holes, is used for installing hexagon socket head cap screw 6; Simultaneously, fixedly neck ring 1 has 4 through holes, is used for the installation between whole device and the pump case.Wear ring 2 inner ring surfaces that float are zigzag fashion, to guarantee better leakage efficiency.
In conjunction with Fig. 7, Fig. 8, the pressure ring 3 that floats self has 4 supporting posts, uses and retaining spring 5, can carry out comparatively freely automatically than heart adjustment to guarantee unsteady wear ring 2.Fixed pressure ring 4 has the assembling that 8 through holes are respectively applied to fixing float pressure ring and single unit system.
Working procedure is as follows:
When centrifugal pump is worked, the impeller outlet place is the zone of high pressure, the impeller inlet place is low pressure area, form the double sealing structure between the floating type mouth ring sealing device of two pass and the impeller, effectively reduced liquid flowing from the zone of high pressure to the low pressure area, the liquid of zone of high pressure, impeller outlet place is earlier through the chopped-off head seal groove, the chopped-off head seal groove is between unsteady wear ring and impeller outer wall, because the shape position error that less matching gap and impeller assembling bring, can make the wear ring that floats along with the running of impeller is carried out automatically than heart adjustment, keep desirable gap between final impeller and the choma to reach, eliminate friction and stuck phenomenon between impeller and the unsteady wear ring.Then, impeller enters the secondary seal groove by the chopped-off head seal groove, the secondary seal groove is at the impeller inwall and fixedly between the neck ring, because fixedly the radial clearance of neck ring and impeller inside is bigger, its sealing effect can weaken to some extent, yet bigger gap has guaranteed impeller and the fixing smoothness run between the neck ring, eliminates impeller and the fixedly friction between the neck ring.Effective use of chopped-off head and secondary seal greatly reduces the leakage loss in the centrifugal pump, has improved the efficient of centrifugal pump; Simultaneously, friction and the stuck phenomenon between impeller and the choma effectively avoided in floating type wear ring design, in the working life of further having improved impeller and choma, guaranteed the safe operation of centrifugal pump.
More than show and described basic principle of the present invention and major character and advantage of the present invention.The technician of the industry should be appreciated that; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and the claimed scope of the present invention is defined by its equivalent of appending claims.
Claims (10)
1. floating type mouth ring sealing device of centrifugal pump two pass, it is characterized in that, comprise fixedly neck ring (1), the wear ring (2) that floats, unsteady pressure ring (3), fixed pressure ring (4), spring (5) and hexagon socket head cap screw (6), the wear ring (2) that floats is installed on fixedly in the neck ring (1), the pressure ring (3) that floats places on the unsteady wear ring (2), and spring (5) is enclosed within respectively on unsteady pressure ring (3) circumference on equally distributed 4 little supporting posts; The fixed pressure ring (4) that will have 4 through holes then is installed on the unsteady pressure ring (3), by 4 supporting posts on the pressure ring (3) that floats fixed pressure ring (4) is positioned, and spring (5) is positioned between unsteady pressure ring (3) and the fixed pressure ring (4); By hexagon socket head cap screw (6) fixed pressure ring (4) is fixed on fixedly on the neck ring (1) at last, wear ring (2) and fixedly between the neck ring (1) certain adjustable clearance is arranged floats.
2. the floating type mouth ring sealing device of a kind of centrifugal pump two pass according to claim 1 is characterized in that described fixedly neck ring (1) is the zigzag fashion sealing configuration, adopts the two pass sawtooth, and the gap between the sawtooth is 4mm.
3. the floating type mouth ring sealing device of a kind of centrifugal pump two pass according to claim 1 and 2 is characterized in that, described fixedly neck ring (1) becomes 0.5mm with the theoretical monolateral gap design of impeller inwall.
4. the floating type mouth ring sealing device of a kind of centrifugal pump two pass according to claim 1 and 2 is characterized in that, has 4 uniform M4 tapped holes on the described fixedly neck ring (1), is used for the final locking of fixed pressure ring (4).
5. the floating type mouth ring sealing device of a kind of centrifugal pump two pass according to claim 1 and 2, it is characterized in that, described fixedly neck ring (1) outer ring has 4 circumferential equally distributed Φ 6 mounting holes, is used for the final connection of integral sealing means and pump housing choma groove.
6. the floating type mouth ring sealing device of a kind of centrifugal pump two pass according to claim 1 and 2 is characterized in that described unsteady wear ring (2) is the zigzag fashion sealing configuration, adopts the two pass sawtooth, and the gap between the sawtooth is 4mm.
7. the floating type mouth ring sealing device of a kind of centrifugal pump two pass according to claim 1 and 2 is characterized in that, described unsteady wear ring (2) becomes 0.2mm with the theoretical monolateral gap design of impeller outer wall.
8. the floating type mouth ring sealing device of a kind of centrifugal pump two pass according to claim 1 and 2 is characterized in that, described unsteady wear ring (2) and fixedly the radially adjustable clearance G between the neck ring (1) can be designed to 0.5～1mm according to impeller size.
9. the floating type mouth ring sealing device of a kind of centrifugal pump two pass according to claim 1 and 2, it is characterized in that, described unsteady pressure ring (2) is by forming radial location between equally distributed 4 supporting posts of circumference and the fixed pressure ring (4), and 4 supporting posts adopt 7 grades of tolerances to carry out Spielpassung with the cooperating of 4 positioning holes on the fixed pressure ring (4).
10. the floating type mouth ring sealing device of a kind of centrifugal pump two pass according to claim 1 and 2 is characterized in that, described unsteady pressure ring (2) has carried out axially locating by spring (5) and fixed pressure ring (4).
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| CN201310247407.XA CN103307020B (en) | 2013-06-20 | 2013-06-20 | A kind of centrifugal pump two pass floating type opening ring seal arrangement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310247407.XA CN103307020B (en) | 2013-06-20 | 2013-06-20 | A kind of centrifugal pump two pass floating type opening ring seal arrangement |
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| CN103307020A true CN103307020A (en) | 2013-09-18 |
| CN103307020B CN103307020B (en) | 2015-09-02 |
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| CN201310247407.XA Active CN103307020B (en) | 2013-06-20 | 2013-06-20 | A kind of centrifugal pump two pass floating type opening ring seal arrangement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968963A (en) * | 2017-03-28 | 2017-07-21 | 江苏大学 | One kind is to rotation mixed flow pump configuration |
| CN108403137A (en) * | 2018-03-13 | 2018-08-17 | 战跃福 | A kind of CT examination bed of self-oscillate position and radiation protection |
| CN112524041A (en) * | 2020-11-25 | 2021-03-19 | 江苏大学 | Centrifugal pump with pair rotor structure |
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| CN201155484Y (en) * | 2007-12-21 | 2008-11-26 | 锦州市劲弓泵业有限责任公司 | Centrifugal-pump impeller and port ring seal device |
| CN103104542A (en) * | 2013-01-20 | 2013-05-15 | 锦州重型水泵有限公司 | Water pump floating sealing ring device |
| CN203335465U (en) * | 2013-06-20 | 2013-12-11 | 江苏大学 | Double floating wear ring sealing device of centrifugal pump |
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| GB748827A (en) * | 1953-04-24 | 1956-05-09 | Masch Ebau Ag Balcke | Improvements relating to seals between the rotary and stationary parts of rotary machines |
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| CN112524041A (en) * | 2020-11-25 | 2021-03-19 | 江苏大学 | Centrifugal pump with pair rotor structure |
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| CN103307020B (en) | 2015-09-02 |
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