CN2288299Y - Combined sealing shaft sleeve - Google Patents
Combined sealing shaft sleeve Download PDFInfo
- Publication number
- CN2288299Y CN2288299Y CN 96217858 CN96217858U CN2288299Y CN 2288299 Y CN2288299 Y CN 2288299Y CN 96217858 CN96217858 CN 96217858 CN 96217858 U CN96217858 U CN 96217858U CN 2288299 Y CN2288299 Y CN 2288299Y
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- CN
- China
- Prior art keywords
- seal
- shaft sleeve
- utility
- axle sleeve
- model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a combined sealing shaft sleeve which is applied to the sealing shaft sleeve of an s type or a sh type centrifugal pump. The front part of the shaft sleeve (4) forms a screw thread seal structure; the back part of the shaft sleeve (4) forms a packing seal structure; the shaft sleeve (4) arranged between the screw thread seal structure and the packing seal structure is provided with steps. The utility model combines the advantages of existing packing seal, mechanical seal, and screw seal and overcomes the disadvantages of the existing packing seal, mechanical seal, and screw seal. When the utility model is refitted, the structure of the annular seal space of an original pump body (1) does not need to be changed, and an original shaft sleeve (4) needs to be replaced only, and two or three packings are arranged additionally. The utility model whose seal effect and energy consumption can reach the level of the mechanical seal has the advantage of low cost and long service life over 18 months, applied to various fluid mediums.
Description
The utility model belongs to pump seal arrangement field, and what relate generally to is a kind of combined sealed axle sleeve.
At present, s type or sh type centrifugal pump have packing seal, mechanical seal and untouchable sealing to the axle encapsulation technique that medium-tight adopted.Packing seal (as shown in Figure 1) is that with filler 2 with the seal chamber filling between the pump housing 1 and the axle 5 closely 6,4,7 are respectively end cover, axle sleeve and water ring among the figure.Because it is to utilize mechanical resistance to be used for reaching sealing purpose, thereby its technical requirements is low, the nonrecurring cost less investment, and easy for installation.Resistance is big, energy consumption is high but it exists in use; Wearing and tearing to axle or axle sleeve are very big, and axle sleeve is about six months working life; Filler itself wearing and tearing, aging, life-span are short to be about 1-2 month; Because of there are the gap in rotating shaft and shaft room, sealing effect is poor, the drawback of leakage rate＞20ml/mm.Mechanical seal is that a pair of rotating ring and stationary ring are set in Seal cage, forming a pair of end face of being close to perpendicular to axis pays, because the relative high speed rotating of dynamic and static ring, make between the end face and to form as thin as a wafer fluid wedge with rigidity, thereby stoped the leakage of medium, made sealability reliable, leakage rate only is about 3ml/mm, and it has, and frictional force is little, energy consumption is low, the life-span long (life cycle was about more than 6-18 month), does not need the characteristics of Maintenance and Repair.But it also has fatal weakness; The cost height, about thousand yuan of about 1-2, complex structure is made up of more than ten accurate Component; Installation precision height, technical requirements height need experienced technician to install, and catastrophic discontinuityfailure easily take place, and therefore, the less use of sealing device generally only is used for the sealing of inflammable, explosive, poisonous or valuable medium.The untouchable thread seal that is sealed into, its principle is identical with worm, and promptly the medium on screw thread double thread surface in rotation produces end thrust, stop leak of liquid, its advantage be almost do not have wearing and tearing, energy consumption is minimum, but the rotating speed that requires wants high, axial dimension is bigger, processing is very high with installation precision simultaneously, sealing effect is unreliable, is not suitable for the medium that impurity is arranged, and has leakage after the parking, need add auxiliary seal, cost is very high.Therefore, seldom use.
The purpose of this utility model promptly produces thus, proposes that a kind of structural design is simple, Installation and Debugging convenient, cost is low, resistance is little, less energy consumption, little, the long service life of wearing and tearing, and good sealing effect is applicable to the combined sealed axle sleeve that various liquid mediums use.
For achieving the above object, the utility model is achieved through the following technical solutions: it is on existing gland sealed basis, the front portion of axle sleeve is designed to the thread seal structure, and the rear portion still is a packing seal structure, is provided with step on the axle sleeve between thread seal structure and packing seal structure.
The utility model reasonable in design, it has the following advantages;
(1), simple in structure, cost is low, only need be converted to this axle sleeve and get final product with overlapping at the bottom of former axle sleeve and the filler.Only need 2-3 root filler, be 1/3rd of original structure.
(2), reliable, effective, the leakage rate of sealability can reach mechanical seal effect leakage rate＜5ml/mm.
(3), energy consumption is low, the 10-20% that can economize on electricity because reduced filler, greatly reduces wearing and tearing.
(4), the life-span is long because good airproof performance, thus need not to press Gland, therefore wearing and tearing also seldom, more than life-span＞18 month.
(5), extensive to medium adaptability, no matter in the medium whether impurity is arranged, or temperature height etc. does not all influence use.
The utility model has following accompanying drawing:
Accompanying drawing 1 is existing packing seal structure schematic representation.
Accompanying drawing 2 is the utility model structural representation.
In conjunction with the accompanying drawings, it is as follows to provide embodiment of the present utility model:
As shown in Figure 2: it is to be made of the pump housing 1, filler 2, gland 3 and axle sleeve 4, axle 5, and the front portion that the axle sleeve 4 and the pump housing are 1 is the thread seal structure, and the rear portion still is a packing seal structure, and axle sleeve 4 is provided with step between thread seal structure and packing seal structure.Its in use, when medium leaks in the axle sleeve 4 by the pump housing 1, at first through one group of thread seal, on a small quantity from the medium of seepage in the thread seal to back twice packing seal owing to do not have relative movement between filler and the cavity, be a static seal.Sealability is fine, and medium is had only through filler and axle sleeve face leakage, selects at this first road filler that quality is closeer, the friction factor materials with smaller for use, as Expanded graphite, carbon fiber, tetrafluoro etc.Therefore, the end face between axle sleeve and the filler is very smooth, forms a pair of seal face after satiety is closed, and the performance of this end face is identical with mechanical seal, and its end force is from Gland.
Claims (3)
1, a kind of combined sealed axle sleeve, comprise the pump housing (1), axle (5), axle sleeve (4), filler (2) and gland (3), it is characterized in that: its front portion of described axle sleeve (4) is the thread seal structure, the rear portion is a packing seal structure, is provided with step between the thread seal structure of axle sleeve (4) and packing seal structure.
2, combined sealed axle sleeve according to claim 1 is characterized in that: described filler (2) is twice.
3, combined sealed axle sleeve according to claim 1 is characterized in that: described filler (2) adopts Expanded graphite, carbon fiber, PTFE to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96217858 CN2288299Y (en) | 1996-07-17 | 1996-07-17 | Combined sealing shaft sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96217858 CN2288299Y (en) | 1996-07-17 | 1996-07-17 | Combined sealing shaft sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2288299Y true CN2288299Y (en) | 1998-08-19 |
Family
ID=33898859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96217858 Expired - Lifetime CN2288299Y (en) | 1996-07-17 | 1996-07-17 | Combined sealing shaft sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2288299Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100529418C (en) * | 2003-04-29 | 2009-08-19 | 上海鼓风机厂有限公司 | A helium blower fan |
| CN102734207A (en) * | 2012-06-21 | 2012-10-17 | 浙江水泵总厂有限公司 | High-temperature boiler feed pump |
-
1996
- 1996-07-17 CN CN 96217858 patent/CN2288299Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100529418C (en) * | 2003-04-29 | 2009-08-19 | 上海鼓风机厂有限公司 | A helium blower fan |
| CN102734207A (en) * | 2012-06-21 | 2012-10-17 | 浙江水泵总厂有限公司 | High-temperature boiler feed 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 |