CN212454808U - Sealing device for high-viscosity gear pump - Google Patents
Sealing device for high-viscosity gear pump Download PDFInfo
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- CN212454808U CN212454808U CN202021203969.6U CN202021203969U CN212454808U CN 212454808 U CN212454808 U CN 212454808U CN 202021203969 U CN202021203969 U CN 202021203969U CN 212454808 U CN212454808 U CN 212454808U
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- end cover
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- gear pump
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Abstract
The utility model provides a sealing device for a high-viscosity gear pump, which is used for rotary sealing of a rotating shaft and comprises a shaft sleeve, a middle end cover, an outer end cover and an inner end cover; the shaft sleeve is fixed on the rotating shaft; the outer end cover, the middle end cover and the inner end cover are sequentially sleeved outside the shaft sleeve; dynamic sealing devices are arranged among the outer end cover, the middle end cover, the inner end cover and the shaft sleeve; a middle end cover is arranged between the inner end cover and the outer end cover; the middle end cover is provided with a circulating liquid inlet and a circulating liquid outlet which are connected with an external circulating liquid source through a pipe joint; a circulating liquid storage cavity is formed between the inner wall of the middle end cover and the outer wall of the shaft sleeve, and circulating liquid is filled in the circulating liquid storage cavity; and a first sealing ring and a second sealing ring are respectively arranged at the inner end and the outer end of the circulating liquid storage cavity. The utility model is radial double-end-face sealing, and realizes the complete sealing of sealing medium through circulating liquid; and by adopting the sealing ring, multi-sealing is realized, and the sealing reliability is improved.
Description
Technical Field
The utility model relates to a device for being directed at gear pump rotation axis seals, especially is used for carrying high viscosity fluid's gear pump.
Background
In the process of conveying polymers in fine chemistry industry, high-viscosity gear pumps are often used for conveying and extruding media due to large molecular structure and high viscosity, such as polystyrene; the traditional high-viscosity gear pump is sealed by using a filler, and the problems of quick filler abrasion, short service cycle and the like exist in the filler sealing; meanwhile, the packing seal has a certain leakage amount, gas is easy to leak, when the high-viscosity gear pump is vacuumized, air in the atmosphere is easy to enter the pump body, and oxygen in the air can react with materials in the pump to influence the product quality; in addition, the abrasion impurities of the packing seal often enter the kettle under the condition of vacuum pumping, and the product quality is polluted.
In order to improve the sealing performance of the high-viscosity gear pump, prolong the service life and enhance the sealing effect, a brand new sealing device is necessary to be designed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high viscosity gear pump is with sealing device to it is fast to solve traditional high viscosity gear pump filler and seal in the filler wearing and tearing, and life cycle is short, and easily causes the gas leakage scheduling problem.
In order to achieve the purpose, the utility model provides a sealing device for a high-viscosity gear pump, which is used for rotating and sealing a rotating shaft and is characterized by comprising a shaft sleeve, a middle end cover, an outer end cover and an inner end cover;
the shaft sleeve is fixed on the rotating shaft, and a plurality of O-shaped ring sealing pieces for static sealing are arranged between the shaft sleeve and the rotating shaft;
the outer end cover, the middle end cover and the inner end cover are sequentially sleeved outside the shaft sleeve; dynamic sealing devices are arranged among the outer end cover, the middle end cover, the inner end cover and the shaft sleeve;
the inner end cover is positioned at the medium end; the outer end cover is positioned at the driving end;
a middle end cover is arranged between the inner end cover and the outer end cover;
the middle end cover is provided with a circulating liquid inlet and a circulating liquid outlet which are connected with an external circulating liquid source through a pipe joint; a circulating liquid storage cavity is formed between the inner wall of the middle end cover and the outer wall of the shaft sleeve, and circulating liquid is filled in the circulating liquid storage cavity;
a first sealing ring and a second sealing ring are respectively arranged at the inner end and the outer end of the circulating liquid storage cavity;
the first sealing ring is positioned between the outer end cover and the middle end cover;
the second sealing ring is located between the inner end cover and the middle end cover.
As a further improvement, the outer end side of axle sleeve is equipped with a plurality of holding screw, holding screw screws up the outer wall of pivot 1, the axle sleeve with the pivot carries out synchronous revolution.
As a further improvement of the utility model, the pressure of the circulating liquid is greater than the medium pressure in the high-viscosity gear pump.
Furthermore, the pressure of the circulating liquid is 0.1MPa greater than the pressure of a medium in the high-viscosity gear pump.
As a further improvement of the present invention, the first seal ring reaches the outside of the second seal ring is provided with a clamping portion.
As a further improvement of the present invention, the first seal ring reaches the inner side of the second seal ring is provided with a seal body.
Furthermore, the upper end and the lower end of the inner side of the sealing body are respectively provided with a sealing lip, and the sealing lips are pressed on the outer wall of the shaft sleeve.
Still further, the upper and lower both ends of seal are equipped with the semicircle recess respectively, the spring is embedded in the semicircle recess, the spring will the both sides in semicircle recess are strutted, the seal lip presses to the outer wall of axle sleeve.
The utility model discloses a sealing device for high viscosity gear pump, the main part of first sealing washer and second sealing washer adopts compound polymer wear-resisting material to make, the spring is spring steel wind spring; the opposite sealing lips of the first sealing ring and the second sealing ring form sealing on a liquid sealing side and are used for sealing circulating liquid; the outer side sealing lip of the first sealing ring forms an atmosphere end seal for preventing outside air and impurities from entering the inside, particularly in circulating liquid or a medium cavity of a high-viscosity gear pump; the inside seal lip of second sealing washer constitutes the medium side seal for prevent that sealing medium from leaking to and prevent that other impurity from entering into the medium intracavity of high viscosity gear pump, prevent to pollute the product, influence product quality.
The sealing device for the high-viscosity gear pump is radial double-end-face sealing, and can realize complete sealing of sealing media by introducing circulating liquid into the double-end-face sealing; meanwhile, the composite high-molecular wear-resistant sealing ring with the spring and the sealing lip is adopted, so that multi-sealing is realized, the sealing reliability is improved, and the problems that a medium is easy to leak, the service life of sealing is short and the like are solved.
Drawings
Fig. 1 is a main sectional view of a sealing device for a high viscosity gear pump according to the present invention;
fig. 2 is a cross-sectional view of the first sealing ring of the present invention.
Detailed Description
The utility model discloses sealing device for high viscosity gear pump's aim at solves the current easy wearing and tearing of sealing material in adopting the sealed high viscosity gear pump of filler, and in the wearing and tearing granule easily entered into the pump, has certain gas leakage scheduling problem simultaneously.
As shown in fig. 1, for the utility model discloses high viscosity is main cross-sectional view of sealing device for gear pump, the utility model discloses can replace the packing completely and seal, seal rotating shaft 1.
The utility model discloses high viscosity is sealing device for gear pump, including axle sleeve 2, well end cover 3, outer end cover 4, interior end cover 5.
The shaft sleeve 2 is sleeved on the rotating shaft 1, and is fixed by a plurality of set screws 21 at the outer end side, so that the shaft sleeve 2 and the rotating shaft 1 rotate synchronously; and a plurality of O-shaped ring sealing pieces 8 are arranged between the shaft sleeve 2 and the rotating shaft 1 for static sealing. Through setting up axle sleeve 2, can be right pivot 1 effectively protects, and reduces right quality requirements such as 1 surface roughness of pivot, whole cylindricity, hardness. The dynamic rotary seal is participated by the shaft sleeve 2.
The inner end cover 5 is positioned at the medium end and used for sealing the medium pump cavity;
the outer end cover 4 is positioned at the driving end;
a middle end cover 3 is arranged between the inner end cover 5 and the outer end cover 4; the middle end cover 3 is provided with a circulating liquid inlet 31 and a circulating liquid outlet 32 which are connected with an external circulating liquid source through a pipe joint; a circulating liquid storage cavity is formed between the inner wall of the middle end cover 3 and the outer wall of the shaft sleeve 2, and circulating liquid is filled in the circulating liquid storage cavity; the circulating liquid is generally solution capable of dissolving high-viscosity media, and when the internal medium is polystyrene, the circulating liquid can be ethylbenzene; the pressure of the circulating liquid is slightly greater than the pressure of a medium in the high-viscosity gear pump, generally greater than 0.1MPa, and the circulating liquid plays a role in blocking the liquid and also plays a role in lubricating friction pairs.
A first sealing ring 6 and a second sealing ring 7 are respectively arranged at the inner end and the outer end of the circulating liquid storage cavity; the first sealing ring 6 is positioned between the outer end cover 4 and the middle end cover 3; the second sealing ring 7 is located between the inner end cover 5 and the middle end cover 3.
As shown in fig. 2, a cross-sectional view of the first sealing ring 6 is shown; the structure of the second sealing ring 7 is also consistent; a clamping part 61 is arranged on the outer side of the first sealing ring 6, so that the outer end cover 4 and the middle end cover 3 can be clamped and fixed; the inner side of the first sealing ring 6 is provided with a sealing body 62, the upper end and the lower end of the sealing body 62 are respectively provided with a semicircular arc groove 63, the upper end and the lower end of the inner side of the sealing body 62 are respectively provided with a sealing lip 64, and the sealing lips 64 are pressed on the outer wall of the shaft sleeve 2.
A spring 65 is embedded in the semi-circular-arc-shaped groove 63, the spring 65 props up two sides of the semi-circular-arc-shaped groove 63, and particularly the sealing lip 64 is pressed towards the outer wall of the shaft sleeve 2 to carry out compression sealing.
The main bodies of the first sealing ring 6 and the second sealing ring 7 are made of composite high polymer wear-resistant materials, and the spring 65 is a spring made of spring steel;
the opposite sealing lips 64 of the first sealing ring 6 and the second sealing ring 7 form a seal on the liquid sealing side and are used for sealing circulating liquid;
the outer side sealing lip 64 of the first sealing ring 6 forms an atmosphere end seal for preventing outside air and impurities from entering the inside, in particular to the circulating liquid or the medium cavity of the high-viscosity gear pump;
the inner side sealing lip 64 of the second sealing ring 7 forms a medium side seal for preventing sealing medium from leaking out, and preventing other impurities from entering a medium cavity of the high-viscosity gear pump, so that the product is prevented from being polluted, and the product quality is prevented from being influenced.
The sealing device for the high-viscosity gear pump is radial double-end-face sealing, and can realize complete sealing of sealing media by introducing circulating liquid into the double-end-face sealing; meanwhile, the composite high-molecular wear-resistant sealing ring with the spring 65 and the sealing lip 64 is adopted, so that multi-sealing is realized, the sealing reliability is improved, and the problems that a medium is easy to leak, the sealing service life is short and the like are solved.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention, and such equivalents and substitutions are intended to be included within the scope of the invention as defined by the appended claims.
Claims (8)
1. The sealing device for the high-viscosity gear pump is used for rotationally sealing a rotating shaft and is characterized by comprising a shaft sleeve, a middle end cover, an outer end cover and an inner end cover;
the shaft sleeve is fixed on the rotating shaft, and a plurality of O-shaped ring sealing pieces for static sealing are arranged between the shaft sleeve and the rotating shaft;
the outer end cover, the middle end cover and the inner end cover are sequentially sleeved outside the shaft sleeve; dynamic sealing devices are arranged among the outer end cover, the middle end cover, the inner end cover and the shaft sleeve;
the inner end cover is positioned at the medium end; the outer end cover is positioned at the driving end;
a middle end cover is arranged between the inner end cover and the outer end cover;
the middle end cover is provided with a circulating liquid inlet and a circulating liquid outlet which are connected with an external circulating liquid source through a pipe joint; a circulating liquid storage cavity is formed between the inner wall of the middle end cover and the outer wall of the shaft sleeve, and circulating liquid is filled in the circulating liquid storage cavity;
a first sealing ring and a second sealing ring are respectively arranged at the inner end and the outer end of the circulating liquid storage cavity;
the first sealing ring is positioned between the outer end cover and the middle end cover;
the second sealing ring is located between the inner end cover and the middle end cover.
2. The sealing device for a high viscosity gear pump according to claim 1, wherein a plurality of set screws are provided on an outer end side of the sleeve, the set screws are screwed to an outer wall of the rotating shaft 1, and the sleeve and the rotating shaft rotate synchronously.
3. The sealing device for a high-viscosity gear pump according to claim 1, wherein the circulating hydraulic pressure is greater than the pressure of the medium in the high-viscosity gear pump.
4. The sealing device for a high-viscosity gear pump according to claim 3, wherein the circulating fluid pressure is 0.1MPa greater than the medium pressure in the high-viscosity gear pump.
5. The sealing device for a high viscosity gear pump according to claim 1, wherein a clamping portion is provided on an outer portion of the first seal ring and the second seal ring.
6. The sealing device for a high viscosity gear pump according to claim 5, wherein sealing bodies are provided inside the first seal ring and the second seal ring.
7. The sealing device for the high viscosity gear pump according to claim 6, wherein sealing lips are provided at upper and lower ends of an inner side of the sealing body, respectively, and the sealing lips are pressed against an outer wall of the shaft sleeve.
8. The sealing device for the high-viscosity gear pump according to claim 7, wherein the sealing body is provided at upper and lower ends thereof with semicircular grooves, respectively, and springs are embedded in the semicircular grooves, the springs urge both sides of the semicircular grooves apart, and the sealing lips press against the outer wall of the sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021203969.6U CN212454808U (en) | 2020-06-24 | 2020-06-24 | Sealing device for high-viscosity gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021203969.6U CN212454808U (en) | 2020-06-24 | 2020-06-24 | Sealing device for high-viscosity gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212454808U true CN212454808U (en) | 2021-02-02 |
Family
ID=74462449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021203969.6U Active CN212454808U (en) | 2020-06-24 | 2020-06-24 | Sealing device for high-viscosity gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212454808U (en) |
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2020
- 2020-06-24 CN CN202021203969.6U patent/CN212454808U/en active Active
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