CN115681203B - Mechanical seal of multi-layer slurry pump - Google Patents
Mechanical seal of multi-layer slurry pumpInfo
- Publication number
- CN115681203B CN115681203B CN202211369951.7A CN202211369951A CN115681203B CN 115681203 B CN115681203 B CN 115681203B CN 202211369951 A CN202211369951 A CN 202211369951A CN 115681203 B CN115681203 B CN 115681203B
- Authority
- CN
- China
- Prior art keywords
- ring
- face
- annular
- flange
- sleeve
- 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.)
- Active
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mechanical Sealing (AREA)
Abstract
本发明公开了多层次渣浆泵的机械密封，包括泵盖、转轴、轴套、连接法兰、动环套以及第二静环，泵盖端部设置有端盖法兰，转轴位于泵盖内的端部上套设有叶轮轮毂，轴套固定套设于转轴上，轴套端面与叶轮轮毂端面贴合，连接法兰固定设置于端盖法兰端面上，连接法兰底部内侧固定连接第一弹簧，第一弹簧活动端固定连接推环，推环端部固定连接第一静环，动环套固定套设于轴套上，动环套左侧设置第一动环，第一动环与第一静环端面贴合，动环套顶部设置第二动环；第二静环设置于泵盖内侧壁上，且第二静环与第二动环端面贴合；通过设置多层机械密封结构，进一步提高渣浆泵的机械密封性能。
This invention discloses a multi-layer mechanical seal for a slurry pump, comprising a pump cover, a rotating shaft, a bushing, a connecting flange, a rotating ring sleeve, and a second stationary ring. An end cover flange is provided at the end of the pump cover. An impeller hub is fitted onto the end of the rotating shaft located inside the pump cover. The bushing is fixedly fitted onto the rotating shaft, with its end face fitting against the end face of the impeller hub. The connecting flange is fixedly installed on the end face of the end cover flange. A first spring is fixedly connected to the inner bottom of the connecting flange, and a push ring is fixedly connected to the movable end of the first spring. A first stationary ring is fixedly connected to the end of the push ring. The rotating ring sleeve is fixedly fitted onto the bushing. A first rotating ring is provided on the left side of the rotating ring sleeve, with its end face fitting against the end face of the first stationary ring. A second rotating ring is provided on the top of the rotating ring sleeve. The second stationary ring is located on the inner wall of the pump cover, with its end face fitting against the end face of the second rotating ring. By setting up a multi-layer mechanical seal structure, the mechanical seal performance of the slurry pump is further improved.
Description
Technical Field
The invention relates to the technical field of mechanical sealing, in particular to mechanical sealing of a multi-layer slurry pump.
Background
The mechanical seal mainly comprises a shaft sleeve, a movable ring, a stationary ring, a sealing ring, a spring, a push ring, a spring seat and various screws. Mechanical sealing is widely used in slurry pumps for mining, metallurgy, electric power, environmental protection and other operations due to the advantages of good sealing effect, small leakage amount, low friction loss, long service period and the like. The mechanical seal of the existing slurry pump is sealed through a group of mechanical seal components, in the long-term use process of the slurry pump, under the flushing of larger pressure and fluid medium turbulence in a pump cavity, smaller medium particles can be continuously accumulated to the friction surfaces of the movable ring and the static ring, and the fluid medium particles are accumulated too much at the friction surfaces, so that the movable ring and the static ring are damaged and worn, and medium leakage is caused.
The mechanical sealing structure comprises a pump shaft, a shaft sleeve is sleeved outside the pump shaft, a spring gland, a push ring, a static ring and a moving ring are arranged on the shaft sleeve, a flange is arranged outside the push ring and connected with the spring gland through a supporting pipe, a first lug is arranged on the periphery of the push ring and is clamped with a first groove formed in the inner side wall of the flange, a second lug is arranged at one end of the push ring and is clamped with a second groove formed in one side of the static ring, a main static ring O-shaped ring is arranged between the transition ring and the static ring, a radial sealing ring of the driving ring is arranged between the moving ring and the shaft sleeve, a third groove is formed in the inner side wall of the moving ring and is clamped with the third lug fixedly connected with the shaft sleeve, a pump cover is arranged on one side of the flange, and a sealing ring of a flange end face is arranged between the pump cover and the transition ring.
The mechanical sealing structure has the advantages that the problems are solved, huge heat generated by friction of the moving ring and the static ring during working can not be cooled timely and fully, lubricating oil at the moving ring and the static ring is not easy to supplement, friction surfaces of the moving ring and the static ring are dry-rubbed, damage at the friction surfaces is further accelerated, and the service life of the mechanical sealing is shortened.
Disclosure of Invention
The invention aims to provide a mechanical seal of a multi-layer slurry pump, and by arranging a multi-layer mechanical seal structure, the mechanical seal performance of the slurry pump is further improved, and the full cooling of a moving ring and a static ring and the easy replenishment of lubricating oil at the friction surfaces of the moving ring and the static ring can be ensured, so that the service life of the mechanical seal is greatly prolonged, and the problems in the background art are solved.
The aim of the invention can be achieved by the following technical scheme:
The utility model provides a mechanical seal of multilayer sediment stuff pump, includes pump cover and pivot, pump cover connector department is provided with the end cover flange, the pivot is located the cover of pump's tip on the cover and overlaps and be equipped with impeller hub, still includes:
the shaft sleeve is fixedly sleeved on the rotating shaft, the end face of the shaft sleeve is attached to the end face of the impeller hub, and an annular sealing ring is arranged between the end face of the shaft sleeve and the end face of the impeller hub;
The connecting flange is fixedly arranged on the end face of the end cover flange, the inner side of the bottom of the connecting flange is fixedly connected with a first spring, the movable end of the first spring is fixedly connected with a push ring, the end part of the push ring is fixedly connected with a first stationary ring, and an annular sealing ring is arranged between the first stationary ring and the inner wall of the end cover flange;
the movable sleeve is fixedly sleeved on the shaft sleeve, a first movable ring is arranged on the left side of the movable sleeve, the first movable ring is attached to the end face of the first stationary ring, and a second movable ring is arranged at the top of the movable sleeve;
The second stationary ring is arranged on the inner side wall of the pump cover, and the second stationary ring is attached to the end face of the second movable ring.
As a further scheme of the invention, a through hole is further formed in the end cover flange, and the through hole is communicated with the inner side wall at the bottom of the end cover flange from the outer side wall at the top of the end cover flange.
As a further scheme of the invention, the inner wall of the second stationary ring is provided with an annular groove, the second movable ring is movably arranged in the annular groove, and the top wall of the second movable ring is attached to the top wall of the annular groove.
As a further scheme of the invention, two opposite side walls in the annular groove are respectively provided with an annular limiting groove, and the annular limiting grooves are respectively provided with a sealing piece.
As a further aspect of the present invention, the sealing member includes:
the second springs are uniformly arranged in the annular limiting grooves;
The sealing ring is arranged at the movable end of the second spring, two sides of the second movable ring are respectively provided with an annular sealing groove matched with the sealing ring, and the end part of the sealing ring is attached in the annular sealing groove.
As a further scheme of the invention, a framework oil seal is arranged between the connecting flange and the shaft sleeve, an oil seal gland is arranged on the side face of the framework oil seal, and the oil seal gland is used for fixing the framework oil seal.
As a further scheme of the invention, an annular sealing ring is arranged between the push ring and the inner wall of the end cover flange.
As a further scheme of the invention, an annular sealing ring is arranged between the movable sleeve and the shaft sleeve.
As a further scheme of the invention, the first movable ring and the first stationary ring are made of silicon carbide ceramic materials.
The invention has at least one of the following beneficial effects:
(1) Through setting up the mechanical seal structure of first rotating ring and first quiet ring one deck, the mechanical seal structure of second rotating ring and second quiet ring another deck and the sealing member on the quiet ring of second, multilayer mechanical seal, when a seal assembly receives the destruction, can compensate by another seal assembly to ensure that the sediment stuff pump can not leak at high-pressure operation environment medium, improve the mechanical seal performance of sediment stuff pump by a wide margin.
(2) The end cover flange, the pump cover and the multi-layer mechanical sealing structure form a closed space, when the slurry pump works, high-pressure cooling water can be injected into the closed space through the through hole, the cooling water can not only sufficiently cool the mechanical sealing structure in time, but also wash away small medium particles attached to the friction surface of the mechanical sealing, and the small medium particles are prevented from causing destructive abrasion of the movable ring and the static ring.
(3) Lubricating oil can be quickly and conveniently injected into the closed space through the through holes at regular intervals, dry friction of friction surfaces of the movable ring and the static ring is avoided, damage of the friction surfaces is further accelerated, and the service life of the mechanical seal is shortened.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of another overall structure of the present invention;
FIG. 3 is a schematic view of the collar structure of the present invention;
FIG. 4 is an enlarged schematic view of the structure of FIG. 1B according to the present invention;
fig. 5 is an enlarged schematic view of the structure of fig. 1 a according to the present invention.
In the figure, 1, a pump cover; 2, a rotating shaft, 3, an end cover flange, 4, an impeller hub, 5, a shaft sleeve, 6, an annular sealing ring, 7, a connecting flange, 8, a first spring, 9, a push ring, 10, a first static ring, 11, a movable sleeve, 12, a first movable ring, 13, a second movable ring, 14, a second static ring, 15, a through hole, 16, an annular groove, 17, an annular limiting groove, 18, a sealing element, 19, a second spring, 20, a sealing ring, 21, an annular sealing groove, 22, a framework oil seal, 23, an oil seal gland, 24 and a closed space.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "disposed," and "sleeved" are to be construed broadly, and may be, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1-5, a mechanical seal of a multi-layer slurry pump includes a shaft sleeve 5, a connecting flange 7, a movable sleeve 11, a first movable ring 12, a first stationary ring 10, a second movable ring 13, a second stationary ring 14, a first spring 8, a push ring 9 and an annular seal ring 6; the end cover flange 3 is detachably and fixedly arranged at the connection port of the pump cover 1 of the slurry pump through bolts, preferably, the end cover flange 3 is partially clamped on the side wall of the end cover connection port, the rotating shaft 2 is positioned at the end part in the pump cover 1, an impeller hub 4 is detachably and fixedly sleeved on the end part, a shaft sleeve 5 is fixedly sleeved on the rotating shaft 2 of the slurry pump, the shaft sleeve 5 is not contacted with the inner walls of the pump cover 1 and the end cover flange 3, the end surface of the shaft sleeve 5 is attached to the end surface of the impeller hub 4, the shaft sleeve 5 can synchronously rotate along with the rotating shaft 2, an annular sealing ring 6 is arranged between the end surface of the shaft sleeve 5 and the end surface of the impeller hub 4, the annular sealing ring 6 can be made of flexible materials such as rubber or silica gel, and the tightness between the end surface of the shaft sleeve 5 and the end surface of the impeller hub 4 is improved; the connecting flange 7 is fixedly connected to the end face of the end cover flange 3 through bolts, preferably, the bottom part of the connecting flange 7 is clamped on the inner wall of the end cover flange 3, the bottom of the connecting flange 7 is not contacted with the shaft sleeve 5, the inner side of the bottom of the connecting flange 7 is fixedly connected with the first spring 8, the inner side of the bottom of the connecting flange 7 is provided with an annular mounting groove, one end of the first spring 8 is fixedly arranged in the annular mounting groove, the movable end of the first spring 8 is fixedly connected with a push ring 9, the end part of the push ring 9 is fixedly connected with a first static ring 10, the outer wall of the push ring 9 and the outer wall of the first static ring 10 are both attached to the inner wall of the end cover flange 3, an annular sealing ring 6 is arranged between the first static ring 10 and the inner wall of the end cover flange 3, the sealing performance between the first stationary ring 10 and the inner wall of the end cover flange 3 is enhanced, the movable sleeve 11 is fixedly sleeved on the shaft sleeve 5, the shaft 2, the shaft sleeve 5 and the movable sleeve 11 are integrated, the shaft sleeve 5 and the movable sleeve 11 synchronously rotate along with the shaft sleeve 5, the first movable ring 12 is arranged on the left side of the movable sleeve 11, the first movable ring 12 is attached to the end face of the first stationary ring 10, the second movable ring 13 is arranged on the top of the movable sleeve 11, the second stationary ring 14 is arranged on the inner side wall of the pump cover 1, the second stationary ring 14 is attached to the end face of the second movable ring 13, the first movable ring 12 and the second movable ring 13 rotate along with the movable sleeve 11, the first spring 8 extrudes the push ring 9, and the push ring 9 extrudes the first stationary ring 10, so that the first stationary ring 10 is tightly attached to the end face of the first movable ring 12. The end cover flange 3, the pump cover 1, the first stationary ring 10, the first movable ring 12, the second stationary ring 14, the second movable ring 13 and the movable sleeve 11 together form a closed space 24 between the end cover and the shaft sleeve 5.
In the running process of the slurry pump, the shaft sleeve 5, the movable ring sleeve 11, the first movable ring 12 and the second movable ring 13 rotate along with the circumference of the rotating shaft 2 at a high speed, the first movable ring 12 and the first static ring 10 are kept in contact and slide relatively, the second movable ring 13 and the second static ring 14 are kept in contact and slide relatively, so that fluid medium is prevented from leaking to the outside, and if the end surfaces of the first movable ring 12 and the first static ring 10 are worn, the fluid medium can be automatically compensated by the first spring 8.
Furthermore, a through hole 15 is formed in the end cover flange 3, the through hole 15 is communicated with the inner side wall at the bottom of the end cover flange 3 from the outer side wall at the top of the end cover flange 3 and extends into the closed space 24, when the slurry pump works, high-pressure cooling water can be injected into the closed space 24 through the through hole 15, the cooling water can not only sufficiently cool the mechanical sealing structure in time, but also wash away small medium particles attached to the friction surface of the mechanical sealing to prevent the small medium particles from damaging the moving ring and the static ring, lubricating oil can also be quickly and conveniently injected into the closed space 24 through the through hole 15 at regular intervals, the dry friction of the moving ring and the static ring friction surface of the mechanical sealing structure is avoided, the damage of the friction surface is further accelerated, and the service life of the mechanical sealing is shortened.
Further, a framework oil seal 22 is arranged between the connecting flange 7 and the shaft sleeve 5, an oil seal gland 23 is arranged on the side face of the framework oil seal 22, the oil seal gland 23 is used for fixing the framework oil seal 22, the oil seal gland 23 is used for guaranteeing that the framework oil seal 22 is fixed in place, and the framework oil seal 22 is fixed on the connecting flange 7 through an inner hexagonal bolt and a positioning clamp, and plays a role in preventing cooling water or lubricating oil from leaking outwards in the operation of the slurry pump.
Furthermore, an annular sealing ring 6 is arranged between the push ring 9 and the inner wall of the end cover flange 3, so that the tightness of the push ring 9 and the end cover flange 3 is improved.
Further, set up ring seal 6 between movable sleeve 11 and the axle sleeve 5, specifically can set up the one end that axle sleeve 5 and impeller wheel hub 4 laminate into the step, the step lateral wall laminating of movable sleeve 11 lateral wall and axle sleeve 5, ring seal 6 sets up between the step lateral wall of movable sleeve 11 lateral wall and axle sleeve 5, strengthens the leakproofness between movable sleeve 11 and the axle sleeve 5.
Through setting up ring seal 6 in many places, can effectively improve the leakproofness of sediment stuff pump mechanical seal mechanism, further guarantee sediment stuff pump normal operating.
Further, the first movable ring 12 and the first static ring 10 are made of silicon carbide ceramic materials, so that the tightness of the first movable ring 12 and the first static ring 10 can be improved, slurry is prevented from contacting and corroding metal, the service life of the mechanical sealing structure is prolonged, and good economic benefits are obtained for users.
Example two
Referring to fig. 1-5, in the first embodiment, an annular groove 16 is formed in an inner wall of a second stationary ring 14, a second movable ring 13 is movably disposed in the annular groove 16, a top wall of the second movable ring 13 is attached to the top wall of the annular groove 16, two opposite side walls in the annular groove 16 are respectively provided with an annular limiting groove 17, a sealing member 18 is respectively disposed in the annular limiting grooves 17, the sealing member 18 specifically includes a second spring 19 and a sealing ring 20, a plurality of second springs 19 are uniformly disposed in the annular limiting grooves 17, the sealing ring 20 is disposed at a movable end of the second spring 19, two sides of the second movable ring 13 are respectively provided with an annular sealing groove 21 matched with the sealing ring 20, and under the action of the plurality of second springs 19, ends of the sealing ring 20 are always attached to the annular sealing grooves 21.
In the running process of the slurry pump, the movable sleeve 11 rotates at a high speed along with the circumference of the rotating shaft 2, so that the second movable ring 13 rotates along with the movable sleeve 11, the second movable ring 13 and the second stationary ring 14 keep in fit and relatively slide, the end part of the sealing ring 20 is in fit with the annular sealing groove 21 and relatively move, thereby preventing fluid medium from leaking into the enclosed space 24, and if the end part of the sealing ring 20 is worn on the fit end surface of the annular sealing groove 21, the sealing ring 20 can be pushed by the second spring 19 to automatically compensate, so that the end part of the sealing ring 20 is always in fit with the annular sealing groove 21, and the sealing performance of the mechanical seal of the layer is ensured.
The outstanding improvement points of the invention are that:
In the mechanical seal of the multi-layer slurry pump in the second embodiment, 1, by arranging the movable sleeve 11 with a special structure, the second movable ring 13 at the top of the movable sleeve 11 is attached to the second stationary ring 14 on the inner side wall of the pump cover 1 to form a first-layer mechanical seal structure, and the end parts of the sealing rings 20 at two sides of the second stationary ring 14 are always attached to the annular sealing groove 21, so that the tightness of the first-layer mechanical seal structure is enhanced; the first movable ring 12 and the first static ring 10 are arranged, the first movable ring 12 and the first static ring 10 are kept in contact and can slide relatively to form a second-level mechanical sealing structure, the first movable ring 12 and the first static ring 10 are made of silicon carbide ceramic materials, the sealing performance of the first movable ring 12 and the first static ring 10 can be improved, slurry contact and metal corrosion are avoided, the service life of the mechanical sealing structure is prolonged, good economic benefits are obtained for users, 2, the end cover flange 3, the pump cover 1, the first static ring 10, the first movable ring 12, the second static ring 14, the second movable ring 13 and the movable ring sleeve 11 form a closed space 24 together between the end cover and the shaft sleeve 5, when the slurry pump works, high-pressure cooling water can be injected into the closed space 24 through the through holes 15, the cooling water can fully cool the mechanical sealing structure in time, small medium particles attached to a mechanical sealing friction surface can be washed away, destructive abrasion of the movable ring and the static ring is prevented, the mechanical friction surface is prevented from being damaged by the small medium particles, the mechanical friction surface is also can be conveniently and quickly injected into the closed space 24 through the through holes 15, and the mechanical friction surface is further shortened, and the service life of the mechanical friction surface is further shortened.
The foregoing detailed description of the preferred embodiments of the invention should not be taken as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211369951.7A CN115681203B (en) | 2022-11-03 | 2022-11-03 | Mechanical seal of multi-layer slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211369951.7A CN115681203B (en) | 2022-11-03 | 2022-11-03 | Mechanical seal of multi-layer slurry pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115681203A CN115681203A (en) | 2023-02-03 |
| CN115681203B true CN115681203B (en) | 2026-04-14 |
Family
ID=85048152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211369951.7A Active CN115681203B (en) | 2022-11-03 | 2022-11-03 | Mechanical seal of multi-layer slurry pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115681203B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532498A (en) * | 2009-04-14 | 2009-09-16 | 苏瑞益 | Mechanical seal of multilayer sludge pump |
| CN111623121A (en) * | 2020-07-01 | 2020-09-04 | 鸿浩泵业有限公司 | A parallel double mechanical seal |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0614145Y2 (en) * | 1988-06-06 | 1994-04-13 | イーグル工業株式会社 | Double mechanical seal type shaft sealing device |
| CN201651306U (en) * | 2009-11-18 | 2010-11-24 | 崔国荣 | Improved metal corrugated pipe mechanical sealing device |
| CN102116308B (en) * | 2011-04-13 | 2012-08-29 | 襄樊五二五泵业有限公司 | Adjustable mechanical sealing structure for pump |
| CN202326376U (en) * | 2011-11-13 | 2012-07-11 | 浙江兰天机械密封件有限公司 | Mechanical seal device of medium-high-temperature high-concentration slurry pump |
| CN202955025U (en) * | 2012-11-20 | 2013-05-29 | 重庆淮安特机械设备有限公司 | Desulphurization pump mechanical seal structure |
| CN208587498U (en) * | 2018-07-20 | 2019-03-08 | 宁波伏尔肯科技股份有限公司 | Flue gas desulphurization system mechanical sealing device of silicon carbide |
| CN209294405U (en) * | 2018-12-14 | 2019-08-23 | 丹东市东升石化设备有限公司 | A kind of Pulp pump integrated spring mechanically-sealing apparatus |
| CN111022368B (en) * | 2019-12-26 | 2024-09-06 | 宁波伏尔肯科技股份有限公司 | A silicon carbide mechanical seal device for a slurry pump |
-
2022
- 2022-11-03 CN CN202211369951.7A patent/CN115681203B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532498A (en) * | 2009-04-14 | 2009-09-16 | 苏瑞益 | Mechanical seal of multilayer sludge pump |
| CN111623121A (en) * | 2020-07-01 | 2020-09-04 | 鸿浩泵业有限公司 | A parallel double mechanical seal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115681203A (en) | 2023-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202851436U (en) | Axial flow pump with dry gas seal | |
| CN111828100A (en) | A tandem dry gas sealing device for industrial steam turbines | |
| CN202832940U (en) | Cooling tower water turbine with water seal | |
| CN209671613U (en) | Dynamic compensation type seal circle | |
| CN209761841U (en) | Leakage-free high-temperature high-pressure hot water pump | |
| CN111810253A (en) | A kind of double-end dry gas sealing device for industrial steam turbine | |
| CN115681203B (en) | Mechanical seal of multi-layer slurry pump | |
| CN213511219U (en) | Flushing-free long-shaft submerged pump | |
| CN214789035U (en) | High-temperature high-pressure mechanical sealing device for composite power groove | |
| CN202971297U (en) | Sealing device of centrifugal pump | |
| CN217633864U (en) | Single screw compressor compresses highly toxic dry gas seal structure for process gas | |
| CN100370147C (en) | Shaft seal device for ultra-low specific speed centrifugal fan | |
| CN113931840B (en) | A combined floating packing sealing structure for a gear pump for discharging melt from the bottom of a kettle | |
| CN213176802U (en) | Integrated mechanical seal suitable for strong damping | |
| CN211259945U (en) | Rotary joint | |
| CN108547791A (en) | A kind of self cooling sealing assembly of centrifugation shurry pump | |
| CN114483638A (en) | Magnetic liquid sealing device for centrifugal pump | |
| CN208106816U (en) | A kind of water pump anti-sediment structure | |
| CN207420890U (en) | A kind of sewage disposal durable type water pump | |
| CN221003239U (en) | Power combined sealing structure for pump | |
| CN111322269A (en) | Mechanical seal mouth ring for lubricating grease of centrifugal pump | |
| CN223594503U (en) | Auxiliary impeller power sealing structure of centrifugal pump | |
| CN221664973U (en) | Centrifugal pump seal structure | |
| CN218093571U (en) | Integrated mechanical seal for double-suction pump | |
| CN112145441B (en) | No-flush long shaft submersible pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |