CN114017384A - Mechanical seal anti-abrasion protection device suitable for muddy sand water pump - Google Patents
Mechanical seal anti-abrasion protection device suitable for muddy sand water pump Download PDFInfo
- Publication number
- CN114017384A CN114017384A CN202111159689.9A CN202111159689A CN114017384A CN 114017384 A CN114017384 A CN 114017384A CN 202111159689 A CN202111159689 A CN 202111159689A CN 114017384 A CN114017384 A CN 114017384A
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- China
- Prior art keywords
- mechanical seal
- ring
- protection device
- cooling water
- water pump
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a mechanical seal abrasion-proof protection device suitable for a silt-containing water pump, which comprises a shaft sleeve and a mechanical seal cavity, wherein a cooling water inlet is formed in the mechanical seal cavity, an isolating ring is arranged in the mechanical seal cavity, the isolating ring is sleeved on the shaft sleeve, a gap B is formed between the outer diameter surface of the isolating ring and the inner surface of the mechanical seal cavity, the gap B is communicated with the inside of a pump body and is used as a water outlet of mechanical seal cooling water, and the flow of the cooling water inlet is greater than that of the gap B. The invention changes the pressure and the water outlet mode of the mechanical seal cooling water, not only plays a role of cooling a friction pair of the mechanical seal, but also completely isolates the silt water in the pump body from the mechanical seal, and has simple structure, convenient use and good effect.
Description
Technical Field
The invention relates to the field of mechanical seal, in particular to a mechanical seal abrasion-proof protection device suitable for a muddy sand water pump.
Background
The mechanical seal is a device for solving the problem of sealing the moving and static parts between a rotating mechanical rotor and a machine body. It is a device for preventing liquid leakage, which is composed of at least one pair of end faces perpendicular to the rotation axis, and the device is kept jointed and relatively slid under the action of liquid pressure and the elastic force (or magnetic force) of a compensation mechanism and the cooperation of auxiliary sealing. The sealing ring is commonly used for rotary fluid machines such as pumps, compressors, reaction kettles and the like, and is also used for sealing machines such as ship tail shafts, gear boxes and the like. Therefore, the mechanical seal is a shaft seal device with wide application.
The mechanical seal mainly consists of four parts: the first part is a friction pair and is a sealing end face consisting of a static ring and a dynamic ring; the second part is a compensation mechanism which is composed of elastic elements such as springs and the like as main parts and has the functions of enabling the sealing end faces to be tightly attached and enabling the rotor to push the moving ring to compensate under the conditions of axial movement and friction pair abrasion; the third part is an auxiliary sealing ring which is composed of a rubber O-shaped sealing ring and is divided into a movable ring sealing ring and a static ring sealing ring; the fourth part is a transmission mechanism, which is a device for enabling the movable ring to rotate along with the shaft and simultaneously plays a role in positioning the movable ring in the axial direction.
When the mechanical seal works, the mechanical seal inevitably contacts with a medium, and special media conveyed by some equipment, such as muddy water containing serious muddy sand, can generate great abrasion on components such as a friction pair, a spring, a rubber O-shaped ring and the like of the mechanical seal in the high-speed rotation of a pump body rotor, thereby seriously shortening the service life of the mechanical seal and causing medium leakage.
At present, mechanical seal manufacturers at home and abroad aim at the media such as muddy water containing serious muddy sand, the best sealing mode is double-end-face mechanical seal, and the working mode of the double-end-face mechanical seal is that friction pairs are arranged on two sides of a mechanical seal assembly, so that the muddy water in a pump body is isolated outside the friction pairs which are relatively wear-resistant, and the aim of protecting the mechanical seal assembly is fulfilled.
But the double mechanical seal also has the following problems: because the dynamic ring and the static ring of the friction pair are sealed by the rubber O-shaped sealing ring, silt water in the pump body can quickly wear the dynamic and static O-shaped sealing rings, internal sealing leakage occurs, so that the silt water in the pump body enters between the internal and external friction pairs of the mechanical seal, and a mechanical seal assembly is worn; because the internal seal friction pair directly contacts with the silt water in the pump body, the abrasion of the friction pair is accelerated, and the silt water in the pump body also enters between the internal and external friction pairs of the mechanical seal, so that the mechanical seal assembly is abraded.
The water pump increases equipment maintenance cost because of mechanical seal damages the leakage, can cause and produce following expense because of changing mechanical seal: the cost of parts resulting from replacement of mechanical seals; the cost of damaging other parts such as the shaft sleeve, the shaft, the bearing and the like of the equipment due to the damage of the mechanical seal; maintenance labor cost due to mechanical seal damage; some large-scale water pumps are damaged because of mechanical seal and overhauld the jack-up hoist and mount expense that produces.
Disclosure of Invention
The invention aims to: to the current mechanical seal's that prior art exists structure, contain serious silt hydroenergy of silt and can get into the mechanical seal cavity, produce great wearing and tearing to components such as mechanical seal's friction pair, spring, rubber O type circle, seriously shorten mechanical seal life, cause the problem of medium leakage, provide a mechanical seal abrasionproof protection device suitable for contain silt waterpump.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a mechanical seal abrasionproof decreases protection device suitable for contain silt water pump, seals the cavity including axle sleeve and machine, be equipped with the cooling water inlet on the machine seals the cavity, be equipped with the isolating ring in the machine seals the cavity, the isolating ring cover is located on the axle sleeve, the external diameter surface of isolating ring with clearance B has between the machine seals the cavity internal surface, inside the clearance B intercommunication pump body, just clearance B is used as the delivery port that the machine sealed the cooling water, the flow of cooling water inlet is greater than clearance B's flow.
By adopting the mechanical seal abrasion-proof protection device suitable for the muddy water-containing water pump, the side of the water pump impeller is isolated from the mechanical seal cavity by arranging the isolation ring to be contacted with muddy water on the side of the water pump impeller; the gap B can ensure that the water pump rotor freely rotates, meanwhile, the gap B is used as a cooling water outlet, the water inflow is greater than the water outflow, the internal pressure of the mechanical seal cavity is increased, the pressure of the mechanical seal cavity is effectively maintained to be greater than the lateral pressure of the impeller, silt water in the pump body cannot flow into the mechanical seal cavity by utilizing the pressure difference, and all mechanical seal assemblies always work in a cooling water environment, so that the purposes of prolonging the service life of the mechanical seal to the maximum extent and ensuring the long-period safe and stable operation of the water pump are achieved; this protection device both plays the vice effect of cooling mechanical seal friction through changing mechanical seal cooling water pressure and play water mode, makes the internal silt water of pump and mechanical seal keep apart completely again, simple structure, convenient to use, respond well, is fit for promoting.
Preferably, a gap A is formed between the inner diameter surface of the isolating ring and the outer diameter surface of the shaft sleeve, the size of the gap A is 0.02-0.05mm, and the size of the gap B is 0.2-0.25 mm.
Preferably, the spacer ring is a stainless steel component.
Further preferably, the isolating ring is made of 316L stainless steel with excellent wear resistance.
Preferably, the thickness of the isolating ring is 15-30 mm.
Preferably, a plurality of positioning bolt holes are radially arranged along the isolating ring, all the positioning bolt holes are uniformly distributed along the circumferential direction of the isolating ring, bolts are adapted to the positioning bolt holes, and the isolating ring is fixed on the shaft sleeve through the bolts.
Preferably, the diameter of the cooling water inlet is 10-16 mm.
Preferably, a spring seat, a spring, a mechanical seal rotating ring and a mechanical seal static ring are further arranged in the mechanical seal cavity, the spring seat, the spring, the mechanical seal rotating ring and the mechanical seal static ring are all sleeved on the shaft sleeve, the mechanical seal static ring is fixedly connected with the mechanical seal cavity shell, the spring seat is fixedly connected with the shaft sleeve, two ends of the spring are respectively connected with the spring seat and the mechanical seal rotating ring, and the spring presses and fits the mechanical seal rotating ring tightly to the mechanical seal static ring.
Further preferably, a sealing ring is arranged between the mechanical seal moving ring and the shaft sleeve, and a sealing ring is arranged between the mechanical seal static ring and the mechanical seal cavity shell.
Preferably, the cooling water inlet is provided with a cooling water screen.
Adopt this kind of structure, the cooling water filter screen filters industrial water impurity, ensures to get into cooling water in the machine seals the cavity is clean industrial water, slows down sealing member wearing and tearing in the machine seals the cavity.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the mechanical seal abrasion-proof protection device suitable for the muddy water-containing water pump, the isolating ring is arranged on the side of the water pump impeller to be in contact with muddy water, so that the side of the water pump impeller is isolated from the mechanical seal cavity; the gap B can ensure that the water pump rotor freely rotates, meanwhile, the gap B is used as a cooling water outlet, the water inflow is greater than the water outflow, the internal pressure of the mechanical seal cavity is increased, the pressure of the mechanical seal cavity is effectively maintained to be greater than the lateral pressure of the impeller, silt water in the pump body cannot flow into the mechanical seal cavity by utilizing the pressure difference, and all mechanical seal assemblies always work in a cooling water environment, so that the purposes of prolonging the service life of the mechanical seal to the maximum extent and ensuring the long-period safe and stable operation of the water pump are achieved; the protection device has the advantages that by changing the pressure and the water outlet mode of the mechanical seal cooling water, the effect of cooling a friction pair of the mechanical seal is achieved, silt water in the pump body is completely separated from the mechanical seal, the structure is simple, the use is convenient, the effect is good, and the protection device is suitable for popularization;
2. according to the mechanical seal abrasion-proof protection device suitable for the muddy sand water pump, impurities in industrial water are filtered by the cooling water filter screen, so that the cooling water entering the mechanical seal cavity is clean industrial water, and abrasion of a sealing element in the mechanical seal cavity is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a mechanical seal anti-abrasion protection device suitable for a muddy water pump.
The labels in the figure are: 1-shaft sleeve, 2-isolating ring, 3-mechanical seal chamber, 4-spring, 5-mechanical seal movable ring, 6-mechanical seal static ring, 7-cooling water inlet and 8-cooling water filter screen.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
As shown in fig. 1, the mechanical seal anti-abrasion protection device for a muddy water pump according to the present invention comprises a shaft sleeve 1 and a mechanical seal chamber 3.
And a cooling water inlet 7 is formed in the machine seal cavity 3, the diameter of the cooling water inlet 7 is 10-16mm, and a cooling water filter screen 8 is arranged at the cooling water inlet 7.
Be equipped with isolating ring 2 in the mechanical seal cavity 3, 2 covers of isolating ring are located on the axle sleeve 1, isolating ring 2 is stainless steel component, specifically adopts the processing of the excellent 316L stainless steel of wearability, and its thickness is 15-30mm, follows isolating ring 2 radially sets up a plurality of positioning bolt hole, all positioning bolt hole follows 2 circumference equipartitions of isolating ring, positioning bolt hole adaptation has the bolt, the bolt will isolating ring 2 is fixed on the axle sleeve 1.
A gap A is formed between the inner diameter surface of the isolating ring 2 and the outer diameter surface of the shaft sleeve 1, the size of the gap A is 0.02-0.05mm, a gap B is formed between the outer diameter surface of the isolating ring 2 and the inner surface of the mechanical seal cavity 3, the size of the gap B is 0.2-0.25mm, the gap B is communicated with the interior of the pump body and serves as a water outlet of mechanical seal cooling water, and the flow of the cooling water inlet 7 is larger than that of the gap B.
Still be equipped with spring holder, spring 4, machine seal rotating ring 5 and machine seal quiet ring 6 in the machine seal cavity 3, the spring holder the spring 4 the machine seal rotating ring 5 with machine seal quiet ring 6 is all located on the axle sleeve 1, machine seal quiet ring 6 with machine seal cavity 3 shell fixed connection, spring holder fixed connection axle sleeve 1, the both ends of spring 4 are connected respectively the spring holder with machine seal rotating ring 5, spring 4 will machine seal rotating ring 5 compress tightly laminate in machine seal quiet ring 6, machine seal rotating ring 5 with be equipped with the sealing washer between the axle sleeve 1, machine seal quiet ring 6 with be equipped with the sealing washer between the machine seal cavity 3 shell.
According to the mechanical seal abrasion-proof protection device suitable for the muddy water-containing water pump, the isolating ring 2 is arranged on the side of the water pump impeller to be in contact with muddy water, so that the side of the water pump impeller is isolated from the mechanical seal chamber 3; the gap B can ensure that the water pump rotor freely rotates, meanwhile, the gap B is used as a cooling water outlet, the water inflow is greater than the water outflow, the internal pressure of the mechanical seal cavity 3 is increased, the pressure of the mechanical seal cavity 3 is effectively maintained to be greater than the side pressure of the impeller, silt water in the pump body cannot flow into the mechanical seal cavity 3 by utilizing the pressure difference, and all mechanical seal assemblies always work in the cooling water environment, so that the purposes of prolonging the service life of the mechanical seal to the maximum extent and ensuring the long-period safe and stable operation of the water pump are achieved; impurities in the industrial water are filtered through the cooling water filter screen 8, the cooling water entering the mechanical seal cavity 3 is ensured to be clean industrial water, and abrasion of a sealing element in the mechanical seal cavity 3 is reduced; this protection device both plays the vice effect of cooling mechanical seal friction through changing mechanical seal cooling water pressure and play water mode, makes the internal silt water of pump and mechanical seal keep apart completely again, simple structure, convenient to use, respond well, is fit for promoting.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a mechanical seal abrasionproof decreases protection device suitable for contain silt water pump, seals cavity (3) including axle sleeve (1) and machine, be equipped with cooling water inlet (7) on machine seals cavity (3), its characterized in that, be equipped with isolating ring (2) in machine seals cavity (3), isolating ring (2) cover is located on axle sleeve (1), the external diameter surface of isolating ring (2) with clearance B has between machine seals cavity (3) internal surface, inside clearance B intercommunication pump body, just clearance B is used as the delivery port of machine seal cooling water, the flow of cooling water inlet (7) is greater than clearance B's flow.
2. The mechanical seal wear prevention device for a muddy water pump according to claim 1, wherein a clearance a is provided between an inner diameter surface of the spacer ring (2) and an outer diameter surface of the sleeve (1), the size of the clearance a is 0.02-0.05mm, and the size of the clearance B is 0.2-0.25 mm.
3. The mechanical seal wear protection device for a muddy water pump according to claim 1, wherein said spacer ring (2) is a stainless steel member.
4. The mechanical seal wear protection device for silt-containing water pumps according to claim 1, wherein the thickness of the spacer ring (2) is 15-30 mm.
5. The mechanical seal abrasion-proof protection device suitable for the muddy sand water pump according to claim 1, characterized in that a plurality of positioning bolt holes are radially arranged along the isolating ring (2), all the positioning bolt holes are circumferentially and uniformly distributed along the isolating ring (2), and the positioning bolt holes are adapted with bolts which fix the isolating ring (2) on the shaft sleeve (1).
6. The mechanical seal wear protection device for silt-containing water pumps according to claim 1, wherein the diameter of the cooling water inlet (7) is 10-16 mm.
7. The mechanical seal abrasion-proof protection device suitable for the muddy sand water pump according to claim 1, wherein a spring seat, a spring (4), a mechanical seal rotating ring (5) and a mechanical seal static ring (6) are further arranged in the mechanical seal chamber (3), the spring seat, the spring (4), the mechanical seal rotating ring (5) and the mechanical seal static ring (6) are all sleeved on the shaft sleeve (1), the mechanical seal static ring (6) is fixedly connected with a housing of the mechanical seal chamber (3), the spring seat is fixedly connected with the shaft sleeve (1), two ends of the spring (4) are respectively connected with the spring seat and the mechanical seal rotating ring (5), and the spring (4) compresses and fits the mechanical seal rotating ring (5) to the mechanical seal static ring (6).
8. The mechanical seal abrasion-proof protection device for the silt-containing water pump according to claim 7, wherein a sealing ring is arranged between the mechanical seal moving ring (5) and the shaft sleeve (1), and a sealing ring is arranged between the mechanical seal static ring (6) and the shell of the mechanical seal cavity (3).
9. The mechanical seal wear protection device for a muddy water pump according to any one of claims 1 to 8, characterized in that said cooling water inlet (7) is provided with a cooling water screen (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111159689.9A CN114017384A (en) | 2021-09-30 | 2021-09-30 | Mechanical seal anti-abrasion protection device suitable for muddy sand water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111159689.9A CN114017384A (en) | 2021-09-30 | 2021-09-30 | Mechanical seal anti-abrasion protection device suitable for muddy sand water pump |
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| Publication Number | Publication Date |
|---|---|
| CN114017384A true CN114017384A (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111159689.9A Pending CN114017384A (en) | 2021-09-30 | 2021-09-30 | Mechanical seal anti-abrasion protection device suitable for muddy sand water pump |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB811270A (en) * | 1958-01-28 | 1959-04-02 | Allis Chalmers Mfg Co | Improved fluid sealing device |
| CH560341A5 (en) * | 1973-02-13 | 1975-03-27 | Sulzer Ag | Pump arrangement with slide ring seal - incorporates pressure increase element in front of blocking circuit |
| CH566501A5 (en) * | 1972-07-07 | 1975-09-15 | Burgmann Dichtungswerk Feodor | |
| US5499901A (en) * | 1994-03-17 | 1996-03-19 | Environamics Corporation | Bearing frame clearance seal construction for a pump |
| CN103233920A (en) * | 2013-04-13 | 2013-08-07 | 丹东克隆集团有限责任公司 | Circulating cooling mechanism for mechanical seal device for pump |
| CN203892241U (en) * | 2014-01-06 | 2014-10-22 | 东莞市华汇精密机械有限公司 | Corrugated pipe mechanical sealing device for high-temperature oil pump |
| CN105090519A (en) * | 2015-06-16 | 2015-11-25 | 湖南华银能源技术有限公司 | Open cooling type mechanical sealing device for coal tar pump |
| CN106949086A (en) * | 2017-02-27 | 2017-07-14 | 浙江大学 | A kind of combined mechanical sealing device |
| CN107816452A (en) * | 2016-05-27 | 2018-03-20 | 柴德维 | A kind of magnetic suspension saves air blower mechanical sealing member |
| CN108412804A (en) * | 2018-04-11 | 2018-08-17 | 宜兴市宙斯泵业有限公司 | A kind of centrifugal pump single end face internally mounted mechanical seal |
| CN111188788A (en) * | 2020-03-05 | 2020-05-22 | 鸿浩泵业有限公司 | Mechanical seal with pre-pressing structure |
| DE102019206205B3 (en) * | 2019-04-30 | 2020-07-09 | Eagleburgmann Germany Gmbh & Co. Kg | Mechanical seal arrangement, in particular for hot media, and pump arrangement |
| CN113446228A (en) * | 2021-08-06 | 2021-09-28 | 宜兴市宙斯泵业有限公司 | Corrosion-resistant wear-resistant centrifugal pump |
-
2021
- 2021-09-30 CN CN202111159689.9A patent/CN114017384A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB811270A (en) * | 1958-01-28 | 1959-04-02 | Allis Chalmers Mfg Co | Improved fluid sealing device |
| CH566501A5 (en) * | 1972-07-07 | 1975-09-15 | Burgmann Dichtungswerk Feodor | |
| CH560341A5 (en) * | 1973-02-13 | 1975-03-27 | Sulzer Ag | Pump arrangement with slide ring seal - incorporates pressure increase element in front of blocking circuit |
| US5499901A (en) * | 1994-03-17 | 1996-03-19 | Environamics Corporation | Bearing frame clearance seal construction for a pump |
| CN103233920A (en) * | 2013-04-13 | 2013-08-07 | 丹东克隆集团有限责任公司 | Circulating cooling mechanism for mechanical seal device for pump |
| CN203892241U (en) * | 2014-01-06 | 2014-10-22 | 东莞市华汇精密机械有限公司 | Corrugated pipe mechanical sealing device for high-temperature oil pump |
| CN105090519A (en) * | 2015-06-16 | 2015-11-25 | 湖南华银能源技术有限公司 | Open cooling type mechanical sealing device for coal tar pump |
| CN107816452A (en) * | 2016-05-27 | 2018-03-20 | 柴德维 | A kind of magnetic suspension saves air blower mechanical sealing member |
| CN106949086A (en) * | 2017-02-27 | 2017-07-14 | 浙江大学 | A kind of combined mechanical sealing device |
| CN108412804A (en) * | 2018-04-11 | 2018-08-17 | 宜兴市宙斯泵业有限公司 | A kind of centrifugal pump single end face internally mounted mechanical seal |
| DE102019206205B3 (en) * | 2019-04-30 | 2020-07-09 | Eagleburgmann Germany Gmbh & Co. Kg | Mechanical seal arrangement, in particular for hot media, and pump arrangement |
| CN111188788A (en) * | 2020-03-05 | 2020-05-22 | 鸿浩泵业有限公司 | Mechanical seal with pre-pressing structure |
| CN113446228A (en) * | 2021-08-06 | 2021-09-28 | 宜兴市宙斯泵业有限公司 | Corrosion-resistant wear-resistant centrifugal pump |
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