CN209976874U - Sealing device for high-temperature material centrifugal pump - Google Patents
Sealing device for high-temperature material centrifugal pump Download PDFInfo
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- CN209976874U CN209976874U CN201920617659.XU CN201920617659U CN209976874U CN 209976874 U CN209976874 U CN 209976874U CN 201920617659 U CN201920617659 U CN 201920617659U CN 209976874 U CN209976874 U CN 209976874U
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Abstract
A sealing device for a centrifugal pump for high-temperature materials relates to the technical field of mechanical sealing, and solves the problems that the centrifugal pump for conveying high-temperature and high-solidifying point materials is short in service life and easy to cause liquid leakage; the composite sealing structure comprises a support sleeve, a main outer sleeve, an auxiliary outer sleeve, a compression spring and a compression cover, wherein a threaded sealing ring is arranged between the support sleeve and the main outer sleeve, a high-temperature resistant layer is coated on the threaded sealing ring, a first high-temperature resistant graphite packing ring is filled between the auxiliary outer sleeve and the support sleeve, the compression spring is arranged at the rear end of the support sleeve, a plurality of layers of second high-temperature resistant graphite packing rings are arranged at the rear end of the compression spring, and the second high-temperature resistant graphite packing rings are attached to the compression spring through the compression cover; the structure greatly improves the high-temperature resistance, reliability and durability of the mechanical sealing device in the centrifugal pump for conveying high-temperature materials, prolongs the service life, reduces the maintenance cost and improves the overall comprehensive efficiency of the centrifugal pump.
Description
Technical Field
The utility model relates to a mechanical seal technical field especially relates to a sealing device for high temperature material centrifugal pump.
Background
Although the mechanical seal is only a component of the machine, it can determine the safety, reliability and durability of the machine. Because it is an advanced shaft seal form with leakage control, environmental protection, energy saving and security, the mechanical seal with more reasonable design, production and use becomes an effective way to solve the problems of running, overflowing, dripping and leakage, improve the environment, improve the efficiency of the machine and reduce the production cost.
In recent years, the development of the coal chemical industry field is fast in China, and more chemical products can be processed and produced. The centrifugal pump is a main device of coal chemical production, and in the production process, high-temperature materials are of a large variety, corresponding requirements on coal tar processing equipment are higher and higher, the original mechanical seal life cycle of the centrifugal pump is shorter, the continuous stability of chemical production is greatly influenced, a single-end-face or double-end-face mechanical seal is adopted for a centrifugal pump generally used for conveying high-temperature and high-solidifying-point materials, and in the actual operation process, due to the actual conditions of high material temperature, high solidifying point and material purity, the service life of the mechanical seal is 1-3 months.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art exists not enough, provides a sealing device for high temperature material centrifugal pump, and the mechanical seal life-span of having solved the high freezing point material centrifugal pump of transport high temperature and involving is short, the problem of weeping appears easily.
The utility model discloses a realize through following technical scheme.
The utility model provides a sealing device for high temperature material centrifugal pump, is in including setting up the mechanical sealing device of impeller terminal surface one side of centrifugal pump, mechanical seal and high temperature resistant graphite packing ring form compound seal structure, compound seal structure including supporting cover, main overcoat, vice overcoat, pressure spring and compressing tightly the lid, support cover and main overcoat between be provided with thread seal circle, thread seal circle on the coating have high temperature resistant layer, vice overcoat and support cover between pack and have first high temperature resistant graphite packing ring support cover rear end be provided with pressure spring, the pressure spring rear end is provided with multilayer second high temperature resistant graphite packing ring, second high temperature resistant graphite packing ring through compressing tightly the lid with pressure spring laminate mutually.
In a further preferable structure, the second high-temperature-resistant graphite packing ring is provided with three layers.
In a further preferable structure, the composite sealing structure is arranged on one side of the pump shaft of the centrifugal pump, which is connected with the pump body.
In a further preferred structure, the high temperature resistant layer is a polyetheretherketone resin layer.
The utility model discloses produced beneficial effect does for prior art.
The utility model combines with the flexible high temperature resistant structure at a plurality of places in the conventional mechanical sealing structure, not only the thread sealing ring arranged between the supporting sleeve and the main coat is coated with the high temperature resistant layer, but also the high temperature graphite packing ring is filled between the auxiliary coat and the supporting sleeve, thereby reducing the abrasion of the sealing surface, enhancing the sealing effect and avoiding the corrosion influence of high temperature materials on the sealing structure; this device still sets up multilayer high temperature resistant graphite packing ring at compression spring's rear side, plays the effect of supplementary buffering compensation on the one hand, and on the other hand strengthens sealed effect under high temperature environment to block external debris to reach the wearing and tearing of sealed face in order to reduce sealed face, increase of service life has also improved sealed effect simultaneously, improves mechanical seal device's high temperature resistant performance, security, reliability and durability by a wide margin. The service life of the mechanical seal is greatly prolonged, the maintenance cost of equipment is reduced, and the overall comprehensive efficiency of the centrifugal pump is improved, so that the centrifugal pump has great effect on the practical popularization of the mechanical seal. The utility model is suitable for a carry the centrifugal pump of high temperature high freezing point material.
Drawings
Fig. 1 is a schematic structural view of a centrifugal pump according to the present invention.
Fig. 2 is an exploded view of the composite sealing structure of the present invention.
The pump comprises a pump body 1, an inlet 2, an outlet 3, a pump shaft 4, a motor 5, an impeller 6, a composite sealing structure 7, a support sleeve 71, a main outer sleeve 72, an auxiliary outer sleeve 73, a compression spring 74, a compression cover 75, a threaded sealing ring 76, a first high-temperature-resistant graphite packing ring 77 and a second high-temperature-resistant graphite packing ring 78, wherein the pump body is 1.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
As shown in fig. 1, the centrifugal pump for conveying high-temperature and high-freezing point materials comprises a pump body 1, an inlet 2, an outlet 3, a pump shaft 4 and a motor 5, wherein an impeller 6 is arranged at the front end of the pump shaft 4, a composite sealing structure 7 is arranged on one side of the end surface of the impeller 6 and one side of the pump shaft 4 connected with the pump body 1, the composite sealing structure 7 is formed by combining a plurality of parts with a flexible high-temperature-resistant structure in a conventional mechanical sealing structure, as shown in fig. 2, the composite sealing structure 7 comprises a support sleeve 71, a main outer sleeve 72, an auxiliary outer sleeve 73, a compression spring 74 and a compression cover 75, a threaded sealing ring 76 is arranged between the support sleeve 71 and the main outer sleeve 72, the threaded sealing ring 76 is coated with a high-temperature-resistant polyether ether ketone resin layer, a first high-temperature-resistant packing ring 77 is filled between the auxiliary outer, the rear end of the support sleeve 71 is provided with the compression spring 74, the rear end of the compression spring 74 is provided with two layers of second high-temperature-resistant graphite packing rings 78, and the second high-temperature-resistant graphite packing rings 78 are attached to the compression spring 74 through compression covers 75.
The sealing structure is combined with a flexible high-temperature-resistant structure at a plurality of positions in a conventional mechanical sealing structure, a high-temperature-resistant layer is coated on a threaded sealing ring 76 arranged between a supporting sleeve 71 and a main outer sleeve 72, and a high-temperature graphite packing ring is filled between an auxiliary outer sleeve 73 and the supporting sleeve 71, so that the abrasion of a sealing surface is reduced, the sealing effect is enhanced, and the corrosion influence of high-temperature materials on the sealing structure is avoided; this structure still sets up multilayer high temperature resistant graphite packing ring at pressure spring 74's rear side, plays the effect of supplementary buffering compensation on the one hand, and on the other hand strengthens sealed effect under high temperature environment to block that external debris from reaching sealed face in order to reduce the wearing and tearing of sealed face, increase of service life has also improved sealed effect simultaneously, improves mechanical seal device's high temperature resistant performance, security, reliability and durability by a wide margin. The service life of the mechanical seal is greatly prolonged, the maintenance cost of equipment is reduced, and the overall comprehensive efficiency of the centrifugal pump is improved, so that the centrifugal pump has great effect on the practical popularization of the mechanical seal.
The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.
Claims (4)
1. A sealing device for a high-temperature material centrifugal pump comprises a mechanical sealing device arranged on one side of the end face of an impeller (6) of the centrifugal pump, and is characterized in that the mechanical sealing device and a high-temperature-resistant graphite packing ring form a composite sealing structure (7), the composite sealing structure (7) comprises a supporting sleeve (71), a main outer sleeve (72), an auxiliary outer sleeve (73), a compression spring (74) and a compression cover (75), a thread sealing ring (76) is arranged between the supporting sleeve (71) and the main outer sleeve (72), a high-temperature-resistant layer is coated on the thread sealing ring (76), a first high-temperature-resistant graphite packing ring (77) is filled between the auxiliary outer sleeve (73) and the supporting sleeve (71), the compression spring (74) is arranged at the rear end of the supporting sleeve (71), a plurality of layers of second high-temperature-resistant graphite packing rings (78) are arranged at the rear end of the compression spring (74), and the second high-temperature-resistant graphite packing ring (78) is attached to the compression spring (74) through a compression cover (75).
2. A sealing arrangement for a centrifugal pump for high temperature materials, as claimed in claim 1, wherein said second high temperature resistant graphite packing ring (78) is provided with three layers.
3. The sealing device for the centrifugal pump for high-temperature materials according to claim 1, characterized in that the composite sealing structure (7) is arranged on the side where the pump shaft (4) of the centrifugal pump is connected with the pump body (1).
4. The sealing device for a centrifugal pump for high-temperature materials as claimed in claim 1, wherein the high-temperature resistant layer is a polyetheretherketone resin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920617659.XU CN209976874U (en) | 2019-04-30 | 2019-04-30 | Sealing device for high-temperature material centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920617659.XU CN209976874U (en) | 2019-04-30 | 2019-04-30 | Sealing device for high-temperature material centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209976874U true CN209976874U (en) | 2020-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920617659.XU Active CN209976874U (en) | 2019-04-30 | 2019-04-30 | Sealing device for high-temperature material centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209976874U (en) |
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2019
- 2019-04-30 CN CN201920617659.XU patent/CN209976874U/en active Active
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