CN2628763Y - Spiral centrifugal pump sealing cover - Google Patents
Spiral centrifugal pump sealing cover Download PDFInfo
- Publication number
- CN2628763Y CN2628763Y CN 03217253 CN03217253U CN2628763Y CN 2628763 Y CN2628763 Y CN 2628763Y CN 03217253 CN03217253 CN 03217253 CN 03217253 U CN03217253 U CN 03217253U CN 2628763 Y CN2628763 Y CN 2628763Y
- Authority
- CN
- China
- Prior art keywords
- centrifugal pump
- sealing lip
- helico
- stuffing box
- seal
- 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 - Fee Related
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- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
Abstract
The utility model belongs to a spiral pump seal which includes a rubber sealing body and a metal sealing ring which is inserted into the rubber sealing body. One end of the sealing body is arranged with a sealing lip. One end of the metal sealing ring sticks to the sealing body and the other exposing end is a smooth flat surface. The contacting working face of the metal sealing ring and the hard surface of the utility model is a smooth flat surface, thereby reducing friction, and the sealability and the operating life are improved greatly.
Description
Technical field
The utility model belongs to the sealing of the running shaft of non-varactor pump.
Background technique
Traditional helico-centrifugal pump, the sealing between its running shaft and the housing much all adopt stuffing box gland to seal.Traditional stuffing box gland structure as shown in Figure 1, it is the rubber body 1 of a sleeve shape, during use, inner circumferential surface is fitted on the running shaft 4, the lower end surface is fitted on the housing 8, this stuffing box gland is because simple shape, and is simple with cooperating of running shaft, seeps water easily and leaks; 2. rubber body is not wear-resisting, and the static seal effect is bad.
Summary of the invention
The purpose of this utility model provide a kind of sealability better, do not allow flimsy helico-centrifugal pump stuffing box gland.
For achieving the above object, the utility model comprises rubbery sealed body and embedding metallic packing ring wherein, and an end of seal is provided with sealing lip, and an end of metallic packing ring is bonded on the seal, and the end face of the other end that exposes is a smooth flat.
Sealing lip be shaped as mazy type, it can contact with the face that running shaft forms broad; The concrete shape of sealing lip can be square waveform.
The shape of above-mentioned sealing lip and the shaft shoulder of pump shaft, groove match; The rubbery sealed body intermediate portion have can and axle between form the to go in ring groove of cavity.
The utility model has reduced friction because the working surface that metallic packing ring contacts with housing is a smooth flat, and its sealability and working life improve greatly.
Description of drawings
Fig. 1 is the prior art structural representation;
Fig. 2 is the utility model example structure schematic representation.
Embodiment
The utility model embodiment's overall structure as shown in Figure 2, it comprises rubbery sealed body 1 and embedding metallic packing ring 2 wherein, one end of seal 1 is provided with sealing lip 3, and an end of metallic packing ring 2 is bonded on the seal 1, and the end face of the other end that exposes is a smooth flat.Sealing lip 3 be shaped as square waveform, it can contact with the face that running shaft 4 forms broads.
The shaft shoulder 5, the groove 6 of the shape of above-mentioned sealing lip 3 and pump shaft 4 match; Rubbery sealed body 1 intermediate portion have can and axle between form the to go in ring groove 7 of cavity.The material of seal 1 is a rubber, has certain elasticity.
During actual the use, make the utility model be installed during installation with having to a certain degree axial compression, the bending that the intermediate portion of seal 1 has to a certain degree produces prestressing force, the internal diameter of metallic packing ring 2 forms Spielpassung greater than the external diameter of running shaft 4, sealing lip 3 closely is enclosed within the position that running shaft 4 has the shaft shoulder 5 and groove 6, and itself and running shaft 4 these position shapes fit like a glove and form tight interference fit; When pump was in off working state, because the effect of elastic prestress, the expansion force of rubbery sealed body 1 can make metallic packing ring 2 closely on 8 surface of contact of the present hole of pressing, realizes good static seal; Because in the cavity between seal 1 and the running shaft 4 spring 9 can be set is enclosed within the rotating shaft 4, prevented that rubbery sealed body 1 from producing unsuitable resiliently deformable, thus and fluid radial compression rubbery sealed body 1 bottom contact surface abrasion and leakage that metallic packing ring 2 off-centre are caused.Sealing lip 3 all plays main seal action with surface of contact, the metallic packing ring 2 of running shaft 4 with the working surface in seat hole 8; When pump is in running order, fluid orders about rubbery sealed body 1 and exerts pressure to running shaft 4, after rubbery sealed body 1 is forced to produce local elasto plastic deformation, produces the sealing surface that shape fits like a glove between itself and the running shaft 4, and be micro-interference fit, realize sealing.Metallic packing ring 2 produces the driving fit friction with seat hole 8 behind the pressurized; Because this face of metallic packing ring 2 is a smooth flat, so friction factor is little, energy loss is few, good sealing effect.
Because sealing lip 3 be mazy type, and itself and running shaft 4 formation tight interference fit, strengthened sealability, stopped the possibility of leakage herein.
Because the elasticity of the existence of seal 3 extensions and rubber body 1 itself, make sealing lip 3 contact the restriction that is not subjected to metallic packing ring 2 substantially with the annular of running shaft 4, be that it can swing or move radially with the eccentric swing on axle surface, further strengthened sealing.This shows, the utlity model has good eccentric tracing ability and vibration resistance.
The utility model is simple in structure, has utilized the elastic force of seal itself, the material of metal ring and the medium power of minute surface driving fit and fluid fully, dexterously, has realized good sealing.And enough intensity is arranged, be easy to install, also improved working life.
The utlity model has the characteristics of high strength, high elasticity, high abrasion.Its running parameter can reach: hydraulic pressure 30kg; Temperature-40 ℃.
Claims (5)
1. a helico-centrifugal pump stuffing box gland comprises rubbery sealed body and embedding metallic packing ring wherein, and an end of seal is provided with sealing lip, it is characterized in that an end of metallic packing ring is bonded on the seal, and the end face of the other end that exposes is a smooth flat.
2. helico-centrifugal pump stuffing box gland according to claim 1 is characterized in that the mazy type that is shaped as of sealing lip, and it can contact with the face that running shaft forms broad.
3. helico-centrifugal pump stuffing box gland according to claim 2 is characterized in that the square waveform that is shaped as of described sealing lip.
4. helico-centrifugal pump stuffing box gland according to claim 2 is characterized in that the shape of sealing lip and the shaft shoulder, the groove of pump shaft match.
5. according to claim 1,2 or 3 described helico-centrifugal pump stuffing box glands, it is characterized in that the rubbery sealed body intermediate portion have can and axle between form the groove of the cavity that goes in ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03217253 CN2628763Y (en) | 2003-05-14 | 2003-05-14 | Spiral centrifugal pump sealing cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03217253 CN2628763Y (en) | 2003-05-14 | 2003-05-14 | Spiral centrifugal pump sealing cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2628763Y true CN2628763Y (en) | 2004-07-28 |
Family
ID=34243406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03217253 Expired - Fee Related CN2628763Y (en) | 2003-05-14 | 2003-05-14 | Spiral centrifugal pump sealing cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2628763Y (en) |
-
2003
- 2003-05-14 CN CN 03217253 patent/CN2628763Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |