CN205047835U - Dry gas seal for back pressure prevention dual -end -face pump - Google Patents
Dry gas seal for back pressure prevention dual -end -face pump Download PDFInfo
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- CN205047835U CN205047835U CN201520017683.1U CN201520017683U CN205047835U CN 205047835 U CN205047835 U CN 205047835U CN 201520017683 U CN201520017683 U CN 201520017683U CN 205047835 U CN205047835 U CN 205047835U
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- ring
- sealing
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- axle sleeve
- throw
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Abstract
The utility model discloses a dry gas seal for back pressure prevention dual -end -face pump, the axle sleeve both ends are overlapped respectively and are equipped with the medium side seal, the atmospheric side is sealed, medium side seal and atmospheric side are sealed symmetrical all including installing the non - compensation ring on the axle sleeve in proper order, the compensation ring, the throw -out collar, a spring, the two sealed facial features laminating of non - compensation ring and compensation ring of homonymy under the quiescent condition, the throw -out collar of medium side and the medial surface of compensation ring are all installed on the compensated ring adaptor, the spring one end of medium side is laminated rather than the homonymy throw -out collar mutually, the other end is installed in the compensated ring adaptor, the compensated ring adaptor links to each other with seal chamber, the throw -out collar of atmospheric side and the medial surface of compensation ring are all installed on the end cover, the spring one end of atmospheric side is laminated rather than the homonymy throw -out collar mutually, the other end is installed in the end cover. The utility model discloses characteristics are: simple structure, operation safe and reliable, long service life has the back pressure of preventing effect, can guarantee the zero leakage of technology medium.
Description
Technical field
The utility model relates to mechanical seal field, is specifically related to a kind of back-pressure preventing both-end face-pumping dry gas seals.
Background technique
Poisonous and harmful, inflammable and explosive gas is often run in petroleum and petrochemical sector; in food processing and medical course of working, also usually require that processing medium does not pollute the external world; and actual job site often there will be pressure medium rises sharply or the operating mode of instability; and common contacting mechanical seal run into above-mentioned operating mode be easy to lost efficacy, cause dielectric leakage.
Model utility content
The purpose of this utility model is to overcome above-mentioned not enough problem, provides a kind of back-pressure preventing both-end face-pumping dry gas seals.
The technological scheme that the utility model is adopted for achieving the above object is: a kind of back-pressure preventing both-end face-pumping dry gas seals, axle sleeve two ends are respectively installed with side medium sealing, atmospheric side seals, described side medium sealing is arranged in seal chamber, described atmospheric side sealing is arranged in end cap, described seal chamber is fixedly connected with end cap, described side medium seals and atmospheric side sealing is symmetrical includes the uncompensated ring be arranged on successively on axle sleeve, compensated loop, throw-out collar, spring, under state of rest, both the uncompensated ring of homonymy and compensated loop sealing surface fits, the uncompensated ring of both sides is installed in axle sleeve and is connected with axle sleeve, and all Sealing is installed between uncompensated ring and axle sleeve, the described throw-out collar of side medium and the inner side surface of compensated loop are installed on compensated ring adaptor, and between three, Sealing is installed, described spring one end and its homonymy throw-out collar of side medium fit, the other end is arranged in compensated ring adaptor, described compensated ring adaptor is connected with seal chamber, and Sealing is installed therebetween, the described throw-out collar of atmospheric side and the inner side surface of compensated loop are installed on end cap, and between three, Sealing is installed, described spring one end and its homonymy throw-out collar of atmospheric side fit, the other end is arranged in end cap.
The Sealing installed between the uncompensated ring of both sides and axle sleeve is O type circle, wherein mounting O-shaped rings one between the end face of uncompensated ring and axle sleeve, mounting O-shaped rings two between the outer side surface of uncompensated ring and axle sleeve; Between the described throw-out collar of side medium, compensated loop, compensated ring adaptor three and the described throw-out collar of atmospheric side, compensated loop, Sealing between end cap three be O type circle three; Sealing between described compensated ring adaptor and seal chamber is O type circle four.
The slippage diameter of described O type circle three is less than the internal diameter of O type circle one place groove, and the diameter of described O type circle four is greater than the diameter of O type circle one.
The described uncompensated ring of both sides is all connected with axle sleeve by driving pin.
The compensated ring adaptor of side medium is connected with seal chamber by stop pin.
Driving ring is installed in described axle sleeve atmospheric side end, and driving ring is connected with end cap by pallet.
Feature of the present utility model is: structure is simple, and safe and reliable to operation, long service life, has back-pressure preventing effect, can ensure processing medium zero leakage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model
Wherein: 1, axle sleeve 2, O type circle 1, driving pin 4, uncompensated ring 5, O type circle 26, compensated loop 7, O type circle 38, throw-out collar 9, spring 10, compensated ring adaptor 11, O type circle 4 12, stop pin 13, seal chamber 14, end cap 15, pallet 16, driving ring.
Embodiment
As shown in Figure 1, the utility model is a kind of back-pressure preventing both-end face-pumping dry gas seals, side medium sealing is set with at axle sleeve 1 two ends, atmospheric side seals, described side medium sealing is arranged in seal chamber 13, described atmospheric side sealing is arranged in end cap 14, described seal chamber 13 is fixedly connected with by socket head screw with end cap 14, described end cap 14 offers cushion gas entrance, described side medium sealing and atmospheric side seal symmetrical, include the uncompensated ring 4 be arranged on successively on axle sleeve 1, compensated loop 6, throw-out collar 8, spring 9, under state of rest, the uncompensated ring 4 of homonymy fits with both compensated loops 6 sealing surface, the uncompensated ring 4 of both sides to be installed in axle sleeve 1 and to be connected with axle sleeve 1 by driving pin 3, and all Sealing is installed between the uncompensated ring 4 of both sides and axle sleeve 1, Sealing preferred O type circle, wherein mounting O-shaped rings 1 between the end face of uncompensated ring 4 and axle sleeve 1, mounting O-shaped rings 25 between the outer side surface of uncompensated ring 4 and axle sleeve 1, the described throw-out collar 8 of side medium and the inner side surface of compensated loop 6 are installed on compensated ring adaptor 10, and between three, Sealing is installed, Sealing preferred O type circle three, described spring 9 one end and its homonymy throw-out collar 8 of side medium fit, the other end is arranged in compensated ring adaptor 10, described compensated ring adaptor 10 is connected with seal chamber 13, and Sealing is installed therebetween, Sealing preferred O type circle 4 11, the described throw-out collar 8 of atmospheric side and the inner side surface of compensated loop 6 are installed on end cap 14, and between three, Sealing is installed, Sealing preferred O type circle three, described spring 9 one end and its homonymy throw-out collar 8 of atmospheric side fit, the other end is arranged in end cap 14, the slippage diameter of described O type circle 37 is less than the internal diameter of O type circle 1 place groove, the diameter of described O type circle 4 11 is greater than the diameter of O type circle 1, described axle sleeve 1 atmospheric side end is fixed with driving ring 16 by jackscrew, described driving ring 16 is connected with end cap 14 by pallet 15, described pallet 15 by socket head screw respectively with driving ring 16, end cap 14 is fixedly connected with.
In normal operating conditions, the cushion gas that the utility model band external air source provides, the pressure of cushion gas is higher than by the pressure medium sealed, side medium sealing is primary seal, atmospheric side sealing is used for sealing cushion gas, now side medium sealing is by malleation, for one end of side medium compensated loop 6, the cushion gas that pressure is high will act on O type circle 37 place of side medium, for one end of the uncompensated ring 4 of side medium, the cushion gas that pressure is high will act on two O type circle 1 places, now O type circle 25 certralizing abilities, but not use as auxiliary seal, simultaneously, O type circle 37 place slippage diameter is less than the groove internal diameter of O type circle 1, thus ensure that the uncompensated ring 4 of side medium can not be pushed out, also make the compensated loop 6 of side medium under the effect of ambient pressure, make sealing reach the working clearance of design, and then ensure the stable of air-film thickness, the opening force formed by air film active force is made to reach balance with the closing force formed by spring force and external fluid pressure, sealing realizes non-contact steady running.
And in actual conditions environment, pressure medium is also non-constant, often there will be pressure medium to rise sharply or cushion gas bleed pressure such as to be die-offed at the situation, now, cushion gas pressure is lower than side medium pressure, side medium sealing is by negative pressure, the uncompensated ring 4 side high-pressure medium of side medium acts on O type circle 1 place of side medium, now O type circle 25 certralizing abilities, but not use as auxiliary seal, the compensated loop 6 side high-pressure medium of side medium then acts on O type circle 4 11 place always, O type circle 4 11 sealed diameter is greater than O type circle 1 sealed diameter, high-pressure medium can promote to move together with other compensating elements of compensated ring adaptor 10 and side medium, the uncompensated ring 4 of side medium still can not be pushed out, the closing force formed by spring force and external fluid pressure is made to reach balance with the opening force formed by air film active force equally, sealing realizes non-contact steady running.
The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to according to the technical solution of the utility model and inventive concept thereof and replace or change, all should be encompassed within protection domain of the present utility model.
Claims (6)
1. a back-pressure preventing both-end face-pumping dry gas seals, it is characterized in that: axle sleeve (1) two ends are respectively installed with side medium sealing, atmospheric side seals, described side medium sealing is arranged in seal chamber (13), described atmospheric side sealing is arranged in end cap (14), described seal chamber (13) is fixedly connected with end cap (14), described side medium sealing and atmospheric side seal symmetrical, include the uncompensated ring (4) be arranged on successively on axle sleeve (1), compensated loop (6), throw-out collar (8), spring (9), under state of rest, the two sealing surface of uncompensated ring (4) and compensated loop (6) of homonymy fits, the uncompensated ring (4) of both sides is installed in axle sleeve (1) and is connected with axle sleeve (1), and all Sealing is installed between uncompensated ring (4) and axle sleeve (1), the described throw-out collar (8) of side medium and the inner side surface of compensated loop (6) are installed on compensated ring adaptor (10), and between three, Sealing is installed, described spring (9) one end and its homonymy throw-out collar (8) of side medium fit, the other end is arranged in compensated ring adaptor (10), described compensated ring adaptor (10) is connected with seal chamber (13), and Sealing is installed therebetween, the described throw-out collar (8) of atmospheric side and the inner side surface of compensated loop (6) are installed on end cap (14), and between three, Sealing is installed, described spring (9) one end and its homonymy throw-out collar (8) of atmospheric side fit, the other end is arranged in end cap (14).
2. back-pressure preventing both-end face-pumping dry gas seals as claimed in claim 1, it is characterized in that: the Sealing installed between the uncompensated ring (4) of both sides and axle sleeve (1) is O type circle, wherein mounting O-shaped rings one (2) between the end face of uncompensated ring (4) and axle sleeve (1), mounting O-shaped rings two (5) between the outer side surface of uncompensated ring (4) and axle sleeve (1); Between the described throw-out collar (8) of side medium, compensated loop (6), compensated ring adaptor (10) three and the described throw-out collar (8) of atmospheric side, compensated loop (6), Sealing between end cap (14) three be O type circle three (7); Sealing between described compensated ring adaptor (10) and seal chamber (13) is O type circle four (11).
3. back-pressure preventing both-end face-pumping dry gas seals as claimed in claim 2, it is characterized in that: the slippage diameter of described O type circle three (7) is less than the internal diameter of O type circle one (2) place groove, the diameter of described O type circle four (11) is greater than the diameter of O type circle one (2).
4. the back-pressure preventing both-end face-pumping dry gas seals as described in claim as arbitrary in claim 1-3, is characterized in that: the described uncompensated ring (4) of both sides is connected with axle sleeve (1) by driving pin (3).
5. the back-pressure preventing both-end face-pumping dry gas seals as described in claim as arbitrary in claim 1-3, is characterized in that: the compensated ring adaptor (10) of side medium is connected with seal chamber (13) by stop pin (12).
6. the back-pressure preventing both-end face-pumping dry gas seals as described in claim as arbitrary in claim 1-3, is characterized in that: driving ring (16) is installed in described axle sleeve (1) atmospheric side end, and driving ring (16) is connected with end cap (14) by pallet (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520017683.1U CN205047835U (en) | 2015-01-12 | 2015-01-12 | Dry gas seal for back pressure prevention dual -end -face pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520017683.1U CN205047835U (en) | 2015-01-12 | 2015-01-12 | Dry gas seal for back pressure prevention dual -end -face pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205047835U true CN205047835U (en) | 2016-02-24 |
Family
ID=55341415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520017683.1U Active CN205047835U (en) | 2015-01-12 | 2015-01-12 | Dry gas seal for back pressure prevention dual -end -face pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205047835U (en) |
-
2015
- 2015-01-12 CN CN201520017683.1U patent/CN205047835U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |