CN2625617Y - Combined sealing device for high pressure multiple-stage centrifugal pump - Google Patents
Combined sealing device for high pressure multiple-stage centrifugal pump Download PDFInfo
- Publication number
- CN2625617Y CN2625617Y CN 03235052 CN03235052U CN2625617Y CN 2625617 Y CN2625617 Y CN 2625617Y CN 03235052 CN03235052 CN 03235052 CN 03235052 U CN03235052 U CN 03235052U CN 2625617 Y CN2625617 Y CN 2625617Y
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- China
- Prior art keywords
- packing
- centrifugal pump
- stage centrifugal
- pressure
- axle sleeve
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- Expired - Lifetime
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Abstract
The utility model relates to a combined sealing device for a high pressure multiple-stage centrifugal pump, which comprises a packing and a packing press cap. The utility model is characterized in that a non-contact type multi-head spiral seal, a balancing chamber communicated with a low pressure chamber, a seal which is made of pulpy calking material and is filled with novel composite material and a sleeve cup type packing chamber are orderly arranged on a pump shaft from the left to the right. The sealing device aims at the characteristics of a high press solid, liquid and gas three-phase flow medium, through the organic assembly of the non-contact type multi-head spiral seal and a separated sealing envelope, the high reliability, the long service life and almost no leak of a pump shaft seal are realized. Simultaneously, the maintenance without stopping of the device is realized; therefore, the maintenance of superfluous and complicated high pressure multi-stage pump shaft seal is easy, quick and economical.
Description
Technical field
The utility model relates to a kind of seal arrangement, particularly relates to a kind of high-pressure multi-stage centrifugal pump combination sealing arrangement that is suitable for having for solid-liquid two-phases such as defeated clear water, non-clean re-injection water and turbid circulating waters the former wet goods three-phase flow medium of the medium of certain corrosion and moisture, gas and sand grains.
Background technique
At present, the fed sheet of a media pressure high-pressure multi-stage centrifugal pump sealing kind that reaches 5～25MPa is mainly mechanical seal, spiral seal and packing seal etc.For occasions such as steel mill's dephosphorize by high pressure water, high oil field water injection and crude oil exportings, the high-pressure multi-stage centrifugal pump is as needing the long period key equipment of operation continuously, because of pump load frequent variations, medium both had been the solid-liquid two-phase flow body, may contain simultaneously gases such as rock gas, above-mentioned sealing and combination thereof all exist reliability to be difficult to adapt to the long period requirement of operation continuously.
The reliability and the service life that are used to seal the solid-liquid two-phase flow body as: mechanical seal are not good enough, especially when containing gas, medium destroys or the sudden change of equipment operation operating mode takes place to lose efficacy easily when vibration and rotor part string move because of the sealing surface liquid film, and changing mechanical seal need disintegrate whole or part equipment, service cycle is long, the expense height.
The spiral seal long service life, it is lower to adapt to pressure, less than 2MPa, though can handle by the pressure release after multiple coil step-down and the sealing for the high-pressure multi-stage pump, dielectric leakage is difficult to avoid.
Packing seal is leaked inevitable, and service life is short, needs to shut down maintenance.
Summary of the invention
The purpose of this utility model is to provide a kind of reliability height, life-span length, guarantees that high-pressure medium does not almost have the high-pressure multi-stage centrifugal pump combination sealing arrangement that leaks and can realize specific (special) requirements such as equipment on-line maintenance.
The purpose of this utility model can reach by the following technical programs, that is: this high-pressure multi-stage centrifugal pump combination sealing arrangement, comprise packing and packing gland, its key is: be provided with a contactless multi-head spiral sealing on pump shaft from left to right successively, a balance chamber that communicates with low-pressure cavity, a sealed member and a socketed cup type stuffing box that is injected with the mud shape joint sealant of novel synthetic material.
High-pressure medium enters balance chamber after contactless multi-head spiral sealing step-down, and balance chamber communicates with the pump low-pressure cavity, makes pressure medium be slightly larger than pump inlet pressure [＜0.6MPa].
According to the above-mentioned high-pressure multi-stage centrifugal pump combination sealing arrangement that assembles, its each effect as following.
The effect of described contactless multi-head spiral sealed member is: when pump operation, pump shaft drives the axle sleeve rotation, spiral chute produces back suction suction effect [direction is opposite with leaking], and the abundant step-down of high-pressure medium with pump chamber leaks reaches the purpose that makes the high-pressure medium step-down; Simultaneously, when solid particle entered spiral seal face, solid particle entered in the spiral chute with medium and is flushed away, thereby reduced the wearing and tearing of solid particle to sealing surface.
The effect of described balance chamber is the medium that the gathering screw sealing part is leaked out, and this chamber communicates with the low-pressure cavity of pump, thereby further reduces the inlet pressure of joint sealant sealed letter.
Mud shape joint sealant in the sealed letter of the sealed member of the described mud shape joint sealant that is injected with novel synthetic material is by special tool the novel synthetic material high pressure to be injected in the Seal cage, when the pump high speed rotating, composite is with the numerous labyrinth of fibrous formation and be wrapped on the axle sleeve, finally reaches the almost leak free sealing effect of the complete depletion of pressure of medium.The sealing parts contain solid particle to medium or contain the influence of gaseous state insensitive, and sudden change takes place can not lose efficacy when vibration and rotor part string move to the pump operation operating mode.When joint sealant in the pump operation caused dielectric leakage because of leakage loss, that can utilize that special tool realizes joint sealant did not shut down interpolation, stopped or alleviated leakage, prolonged the operation period of equipment.
Because joint sealant belongs to flexible material, its sealed letter two ends are provided with packing and throttling arrangement, and the joint sealant front end promptly can stop the joint sealant pump chamber that bleeds near the restrictor ring of balance chamber's end and packing; When sealed letter entrance point pressure is higher, damage for preventing its terminal packing frictional heating that is squeezed, thereby cause the axle sleeve wearing and tearing to accelerate, the utility model specially is provided with the socketed cup type stuffing box structure, utilize of the extruding of metal cup blocking-up joint sealant to packing, can effectively avoid packing heat waste phenomenon to take place, and prevent leaking outside of joint sealant.
In sum; the utility model is for the high-pressure service pump of high reliability and the continuous service condition of long period; has the medium of certain corrosion and moisture in solid-liquid two-phases such as carrying non-clean re-injection water and turbid circulating water; during the former wet goods three-phase flow medium of gas and sand grains; by the sealing of contactless multi-head spiral and the formed combination sealing arrangement of split type sealed letter and at high pressure and medium characteristics; innovate at combined sealing structure in form; solve existing sealing technique and guaranteed high reliability; long lifetime and almost do not have the deficiency of leakage aspect; that has realized the equipment axis envelope does not shut down maintenance, has reached the purpose of this utility model.
Description of drawings
Fig. 1 is the utility model overall construction drawing.
Embodiment
Hereinafter with reference to accompanying drawing specific embodiment of the utility model is further described:
Referring to Fig. 1, this high-pressure multi-stage centrifugal pump combination sealing arrangement, comprise packing and packing gland, its key is: be provided with a contactless multi-head spiral sealing on pump shaft 11 from left to right successively, 12, one of a balance chamber that communicates with low-pressure cavity 13 is injected with sealed member and socketed cup type stuffing box of the mud shape joint sealant of novel synthetic material.
Described contactless multi-head spiral is sealed with the axle sleeve 1 and a nockbush 2 that keeps certain seal clearance to be connected by spiral with axle sleeve 1 cylindrical that are fastened on the pump shaft 11.
Described in axle sleeve 1 cylindrical and nockbush 2 circle on be provided with multi-head spiral groove, its rotation direction is opposite with the pump rotor sense of rotation.
The described sealed member that is injected with the mud shape joint sealant of novel synthetic material has sealed letter second 4 and the sealed letter first 8 that is connected, and in axle sleeve 3 and sealed letter second, first 4,8 cavitys that surrounded restrictor ring 5, packing 6, mud shape joint sealant 7 and packing a set of cups 9 is housed successively from left to right.
Being connected between described sealed letter second 4 and the sealed letter first 8 removably connects, and has in sealed letter first 8 outer installment and need not shut down the one-way valve 14 that can add joint sealant 7.
Describedly restrictor ring and packing are housed in packing a set of cups 9 inner peripheral surfaces and the formed cavity of axle sleeve 3 cylindricals successively and compress with packing gland 10.
Connection between sealed letter first, the second is made as removably connects, change restrictor ring and packing in the sealed letter second when mainly being convenient to the pump maintenance, do not shut down interpolation what the one-way valve 14 in order to add joint sealant of sealed letter first outer installment can be realized joint sealant.
Claims (6)
1, a kind of high-pressure multi-stage centrifugal pump combination sealing arrangement, comprise packing and packing gland, it is characterized in that: on pump shaft (11), be provided with a contactless multi-head spiral sealing from left to right successively, a balance chamber (12) that communicates with low-pressure cavity (13), a sealed member and a socketed cup type stuffing box that is injected with the mud shape joint sealant of novel synthetic material.
2, high-pressure multi-stage centrifugal pump combination sealing arrangement according to claim 1 is characterized in that contactless multi-head spiral is sealed with an axle sleeve (1) and a nockbush (2) that keeps certain seal clearance to be connected by spiral with axle sleeve (1) cylindrical that is fastened on the pump shaft (11).
3, according to claim 1,2 described high-pressure multi-stage centrifugal pump combination sealing arrangements, it is characterized in that in axle sleeve (1) cylindrical and nockbush (2), being provided with multi-head spiral groove on the circle, its rotation direction is opposite with the pump rotor sense of rotation.
4, high-pressure multi-stage centrifugal pump combination sealing arrangement according to claim 1, it is characterized in that: the sealed member that is injected with the mud shape joint sealant of novel synthetic material has sealed letter second (4) and the sealed letter first (8) that is connected, and in the cavity that axle sleeve (3) and sealed letter second, first (4,8) are surrounded restrictor ring (5), packing (6), mud shape joint sealant (7) and packing a set of cups (9) is housed successively from left to right.
5, according to claim 1,4 described high-pressure multi-stage centrifugal pump combination sealing arrangements; it is characterized in that: being connected between sealed letter second (4) and the sealed letter first (8) removably connects, and has in sealed letter first (8) outer installment and need not shut down the one-way valve (14) that can add joint sealant (7).
6, high-pressure multi-stage centrifugal pump combination sealing arrangement according to claim 1 is characterized in that: the socketed cup type stuffing box is restrictor ring and packing are housed in packing a set of cups (9) inner peripheral surface and the formed cavity of axle sleeve (3) cylindrical successively and compress with packing gland (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03235052 CN2625617Y (en) | 2003-06-20 | 2003-06-20 | Combined sealing device for high pressure multiple-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03235052 CN2625617Y (en) | 2003-06-20 | 2003-06-20 | Combined sealing device for high pressure multiple-stage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2625617Y true CN2625617Y (en) | 2004-07-14 |
Family
ID=34249534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03235052 Expired - Lifetime CN2625617Y (en) | 2003-06-20 | 2003-06-20 | Combined sealing device for high pressure multiple-stage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2625617Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486074A (en) * | 2013-08-26 | 2014-01-01 | 神华集团有限责任公司 | Seal cartridge assembly for driving end of centrifugal pump and centrifugal pump |
| CN103746493A (en) * | 2014-01-07 | 2014-04-23 | 天津大学 | Main shaft sealing device of high-speed turbine-generator applied to ORC (organic Rankine cycle) |
| CN109654060A (en) * | 2019-01-11 | 2019-04-19 | 江苏泰丰泵业有限公司 | A kind of water pump selection packing seal structure |
| CN111648997A (en) * | 2020-06-09 | 2020-09-11 | 长沙佳能通用泵业有限公司 | High-pressure end sealing mechanism of ore pulp multistage centrifugal pump |
-
2003
- 2003-06-20 CN CN 03235052 patent/CN2625617Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486074A (en) * | 2013-08-26 | 2014-01-01 | 神华集团有限责任公司 | Seal cartridge assembly for driving end of centrifugal pump and centrifugal pump |
| CN103746493A (en) * | 2014-01-07 | 2014-04-23 | 天津大学 | Main shaft sealing device of high-speed turbine-generator applied to ORC (organic Rankine cycle) |
| CN103746493B (en) * | 2014-01-07 | 2016-08-17 | 天津大学 | A kind of main shaft sealing device of the high rate turbine-electromotor being applied to ORC |
| CN109654060A (en) * | 2019-01-11 | 2019-04-19 | 江苏泰丰泵业有限公司 | A kind of water pump selection packing seal structure |
| CN111648997A (en) * | 2020-06-09 | 2020-09-11 | 长沙佳能通用泵业有限公司 | High-pressure end sealing mechanism of ore pulp multistage centrifugal pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130620 Granted publication date: 20040714 |