CN202007791U - Multistage centrifugal type blower sealing device - Google Patents
Multistage centrifugal type blower sealing device Download PDFInfo
- Publication number
- CN202007791U CN202007791U CN2011200567729U CN201120056772U CN202007791U CN 202007791 U CN202007791 U CN 202007791U CN 2011200567729 U CN2011200567729 U CN 2011200567729U CN 201120056772 U CN201120056772 U CN 201120056772U CN 202007791 U CN202007791 U CN 202007791U
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- balance
- blower
- balance tube
- pressure
- shaft seal
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Abstract
The utility model provides a multistage centrifugal type blower sealing device comprising a negative-pressure end shaft seal and a high-pressure end shaft seal. The negative-pressure end shaft seal comprises a carbon ring shaft seal, a labyrinth shaft seal, and a balancing pipe I, of which one end is connected in a cavity of a labyrinth shaft seal I, and the other end is connected in a high pressure cavity of a blower. A regulating valve I is connected in the balancing pipe I. The high-pressure end shaft seal comprises a balance disc seal, a labyrinth shaft seal, a carbon ring shaft seal and a balancing pipe II, wherein the balance disc seal is connected to the periphery of a balance disc. One end of the balancing pipe II is connected in a low-pressure cavity of the balance disc, and the other end of the balancing pipe II is connected in a negative pressure cavity of the blower. A regulating valve II also can be connected in the balancing pipe II. Since the multistage centrifugal type blower sealing device employs a multilayer sealing structure, the air pressure outside and inside the blower is balanced, such that extraneous air does not enter into the blower, and air inside the blower does not leak out. In this way, the safety is high. Moreover, the axial force applied on a thrust bearing is reduced, operational stability of the device is improved, and the service lifetime of blower parts is prolonged.
Description
Technical field
The utility model provides a kind of seal arrangement of centrifugal blower, refers in particular to a kind of the employing respectively at negative pressure end and high voltage terminal and comprises the multiple centrifugal fan seal arrangement of balance tube in interior multiple seal approach.
Background technique
Conventional multiple-stage centrifugal fan, what it sealed most usefulness is simple labyrinth seal and carbon ring shaftseal, no pressure equaliser.The labyrinth seal leakage rate is big; produce serious noise; waste energy, carbon ring shaftseal wearing and tearing back leakage rate is also big; life-span is short; and price height; for some blowers that sucks explosive gas, pollution gas, adopt this seal arrangement can not satisfy the security requirement and the environmental protection requirement of equipment stable operation.
Number of patent application is that the specification of CN201010122871.2 discloses a kind of blower fan seal arrangement, adopts labyrinth seal, water-stop, packing seal.Water-stop wherein causes that easily water leaks, and causes electrical leakage and environmental pollution.
Number of patent application is that the specification of CN01234555.5 discloses a kind of gas fan shaft sealing leakage air inflation sealing device, and the fan shaft sealing part is filled inert gas to prevent gas leakage, and its structure is complicated, and inert gas consumption is more, and cost is higher.
The model utility content
Model utility purpose: overcome traditional unbalanced defective of centrifugal blower seal arrangement inner and outer air pressure, provide a kind of inside and outside air pressure balance, the multiple-stage centrifugal fan seal arrangement that end thrust is little.
Technological scheme: the seal arrangement that the utility model adopts, contain the shaft sealing of negative pressure end and high voltage terminal shaft sealing two-part, the shaft sealing of negative pressure end contains carbon ring shaftseal, labyrinth axle envelope, and the high voltage terminal shaft sealing contains carbon ring shaftseal, labyrinth axle envelope.The progression that adopts centrifugal blower of the present utility model is the 2-8 level.The shaft sealing of negative pressure end also contains balance tube I, and balance tube I one end connects in the cavity of negative pressure end labyrinth axle envelope, and the balance tube I the other end connects the blower hyperbaric chamber, reaches the effect of sealing by the pressure balance at two ends; Be connected with modulating valve I among the balance tube I, be convenient to control folding with adjustment pipe I.The high voltage terminal shaft sealing also contains the Balance disc Sealing, and the Balance disc Sealing is connected the Balance disc periphery, and Balance disc is enclosed within on the axle, and Balance disc is between the labyrinth of high voltage terminal axle envelope and draught fan impeller.
Described high voltage terminal shaft sealing also contains balance tube II, balance tube II one end connects the blower negative cavity, the other end connects the low-pressure cavity in the Balance disc outside, introduces the pressure that negative pressure is controlled the Balance disc low-pressure cavity from the blower negative cavity, reaches the effect of sealing by the pressure balance at two ends.
Also can be connected with modulating valve II among the described balance tube II, be convenient to control folding with adjustment pipe II.
Can also be connected with the corrugated pipe segment of being convenient to stretch among the described balance tube I or among the balance tube II, perhaps be connected with the corrugated pipe segment of being convenient to stretch simultaneously, when being convenient to expand with heat and contract with cold, not produce stress among the balance tube I or among the balance tube II.
The caliber of described balance tube I and balance tube II all can be 25mm-50mm.
Beneficial effect:
The multi-layer sealing structure that the utility model adopts makes inside and outside air pressure balance, the air of outside can not enter in the air blast, gas in the blower can not leak into the outside, suck air, the potential safety hazard that sets off an explosion from the negative pressure end when having avoided working medium to be special gas (hydrogen, carbon monoxide, methane etc.); Can also alleviate the end thrust that thrust-bearing bears, improve operation stability of equipment, prolong the blower fan part life.
After blower rotor rotates, produce bigger negative pressure in the blower negative cavity, we meet balance tube I at the blower hyperbaric chamber, pressurized gas are imported in the Seal cage of labyrinth seal of low voltage terminal, positive pressure in the Seal cage is increased, and its size is regulated by modulating valve I.When cavity pressure is transferred to null value, i.e. positive/negative pressure position state of equilibrium, the gas in the blower can not leak in the air, and the air of outside can not suck in the blower.The effect of carbon ring shaftseal is to play the enhanced leaktightness effect when air-flow has fluctuation.
Produce very big pressure in the blower hyperbaric chamber, we meet balance tube II from the blower negative cavity, and negative-pressure gas is introduced the blower low-pressure cavity, and the pressure of low-pressure cavity is reduced, pass through the labyrinth seal of high voltage terminal, the double sealing of carbon ring shaftseal again, guaranteed that pressurized gas axially do not have leakage.At this moment, because the pressure of low-pressure cavity reduces, the pressure reduction of Balance disc both sides strengthens, and has reduced the axial load of thrust-bearing.The size of axial load can reach by the pressure of modulating valve II adjusting low-pressure cavity.
Description of drawings
Accompanying drawing is a cross-sectional view of the present utility model;
Among the figure: 1, carbon ring shaftseal; 2, labyrinth axle envelope; 3, balance tube I; 4, modulating valve I; 5, impeller; 6, hyperbaric chamber; 7, Balance disc; 8, Balance disc sealing; 9, low-pressure cavity; 10, stator; 11, axle; 12, modulating valve II; 13, balance tube II; 14, negative cavity.
Embodiment
Select or make the component of suitable types specification and suitable quantity for use: axle 11, two cover carbon ring shaftseals 1, two cover labyrinth axle envelopes 2, balance tube I 3, modulating valve I 4, Balance disc 7, Balance disc sealing 8, stator 10, modulating valve II 12, balance tube II 13.
Press shown in the accompanying drawing, each component is coupled together, form negative cavity 14, hyperbaric chamber 6, Balance disc low-pressure cavity 9.
Embodiment 1:
It is 2 grades impeller 5 that centrifugal blower has progression; The caliber of described balance tube I 3 is 25mm.The shaft sealing of negative pressure end contains balance tube I 3, and balance tube I 3 one ends connect in the cavity of 2 of negative pressure end labyrinth axle envelopes, and balance tube I 3 the other ends connect blower hyperbaric chamber 6, reach the effect of sealing by the pressure balance at two ends; The high voltage terminal shaft sealing contains Balance disc sealing 8, and Balance disc sealing 8 is connected Balance disc 7 peripheries, and Balance disc 7 is enclosed within on the axle 11, and Balance disc 7 is between the labyrinth of high voltage terminal axle envelope 2 and impeller 5.Be connected with modulating valve I 4 among the described balance tube I 3.
Embodiment 2:
As shown in drawings, to have progression be 4 grades impeller 5 to centrifugal blower; The caliber of described balance tube I 3 and balance tube II 13 is 35mm.The shaft sealing of negative pressure end contains balance tube I 3, and balance tube I 3 one ends connect in the cavity of negative pressure end labyrinth axle envelope 2, and balance tube I 3 the other ends connect blower hyperbaric chamber 6, reach the effect of sealing by the pressure balance at two ends; The high voltage terminal shaft sealing contains Balance disc sealing 8, and Balance disc sealing 8 is connected Balance disc 7 peripheries, and Balance disc 7 is enclosed within on the axle 11, and Balance disc 7 is between the labyrinth of high voltage terminal axle envelope 2 and impeller 5.Be connected with modulating valve I 4 among the described balance tube I 3.
Described high voltage terminal shaft sealing contains balance tube II 13, balance tube II 13 1 ends connect blower negative cavity 14, the other end connects the low-pressure cavity 9 in Balance disc 7 outsides, introduces the pressure that negative pressure is controlled low-pressure cavity 9 from blower negative cavity 14, reaches the effect of sealing by the pressure balance at two ends.Be connected with modulating valve II12 among the described balance tube II 13.
Embodiment 3:
It is 6 grades impeller 5 that centrifugal blower has progression; The caliber of described balance tube I 3 and balance tube II 13 is 50mm.The shaft sealing of negative pressure end contains balance tube I 3, and balance tube I 3 one ends connect in the cavity of negative pressure end labyrinth axle envelope 2, and balance tube I 3 the other ends connect blower hyperbaric chamber 6, reach the effect of sealing by the pressure balance at two ends; The high voltage terminal shaft sealing contains Balance disc sealing 8, and Balance disc sealing 8 is connected Balance disc 7 peripheries, and Balance disc 7 is enclosed within on the axle 11, and Balance disc 7 is between the labyrinth of high voltage terminal axle envelope 2 and impeller 5.
Described high voltage terminal shaft sealing contains balance tube II 13, balance tube II 13 1 ends connect blower negative cavity 14, the other end connects the low-pressure cavity 9 in Balance disc 7 outsides, introduces the pressure that negative pressure is controlled low-pressure cavity 9 from blower negative cavity 14, reaches the effect of sealing by the pressure balance at two ends.Be connected with the corrugated pipe segment of being convenient to stretch among the described balance tube I 3 neutral equilibrium pipe II 13.
Adopt the multiple-stage centrifugal fan of the gland seal device among above-mentioned three embodiments, owing to adopt multi-layer sealing structure, make inside and outside air pressure balance, the air of outside can not enter in the air blast, gas in the blower can not leak into the outside, suck air, the potential safety hazard that sets off an explosion from the negative pressure end when having avoided working medium to be explosion hazard gases; Can also alleviate the end thrust that thrust-bearing bears, improve operation stability of equipment, prolong the blower fan part life.
Claims (6)
1. multiple-stage centrifugal fan seal arrangement, contain the shaft sealing of negative pressure end and high voltage terminal shaft sealing two-part, the shaft sealing of negative pressure end contains carbon ring shaftseal (1), labyrinth axle envelope (2), the high voltage terminal shaft sealing contains carbon ring shaftseal (1), labyrinth axle envelope (2), and it is characterized in that: the progression of centrifugal blower is the 2-8 level; The shaft sealing of negative pressure end also contains balance tube I 3), balance tube I (3) one ends connect in the cavity of negative pressure end labyrinth axle envelope (2), and balance tube I (3) the other end connects blower hyperbaric chamber (6), is connected with modulating valve I (4) among the balance tube I (3); The high voltage terminal shaft sealing also contains Balance disc sealing (8), and Balance disc sealing (8) is connected Balance disc (7) periphery, and Balance disc (7) is enclosed within on the axle (11), and Balance disc (7) is between the labyrinth of high voltage terminal axle envelope (2) and draught fan impeller.
2. multiple-stage centrifugal fan seal arrangement according to claim 1, it is characterized in that: described high voltage terminal shaft sealing also contains balance tube II (13), balance tube II (13) one ends connect blower negative cavity (14), and the other end connects the low-pressure cavity (9) in Balance disc (7) outside.
3. multiple-stage centrifugal fan seal arrangement according to claim 1 and 2 is characterized in that: be connected with modulating valve II (12) among the described balance tube II (13).
4. multiple-stage centrifugal fan seal arrangement according to claim 1 and 2 is characterized in that: be connected with the corrugated pipe segment of being convenient to stretch among the described balance tube I (3) or among the balance tube II (13).
5. multiple-stage centrifugal fan seal arrangement according to claim 1 and 2 is characterized in that: be connected with the corrugated pipe segment of being convenient to stretch simultaneously among described balance tube I (3) the neutral equilibrium pipe II (13).
6. multiple-stage centrifugal fan seal arrangement according to claim 1 and 2 is characterized in that: the caliber of described balance tube I (3) and balance tube II (13) is 25mm-50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200567729U CN202007791U (en) | 2011-03-07 | 2011-03-07 | Multistage centrifugal type blower sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200567729U CN202007791U (en) | 2011-03-07 | 2011-03-07 | Multistage centrifugal type blower sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202007791U true CN202007791U (en) | 2011-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200567729U Expired - Fee Related CN202007791U (en) | 2011-03-07 | 2011-03-07 | Multistage centrifugal type blower sealing device |
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| Country | Link |
|---|---|
| CN (1) | CN202007791U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573652A (en) * | 2012-07-20 | 2014-02-12 | 湖北省风机厂有限公司 | Steel-plate welded multistage high-speed oxygen supercharging blower |
| CN104343473A (en) * | 2014-09-02 | 2015-02-11 | 华中科技大学 | Shaft end seal device for organic working medium radial-inward-flow turbine |
| CN106704558A (en) * | 2016-12-12 | 2017-05-24 | 重庆江增船舶重工有限公司 | Gearbox structure for centrifugal machine |
| CN106762793A (en) * | 2017-01-03 | 2017-05-31 | 山东钢铁股份有限公司 | A kind of device for preventing air blower shaft end sealing leak coal gas |
| CN111120414A (en) * | 2019-12-13 | 2020-05-08 | 西安航天动力研究所 | Axial force balance structure and method for large-flow high-power precompression pump |
| CN114576183A (en) * | 2020-12-02 | 2022-06-03 | 中国石油化工股份有限公司 | Explosion-proof multistage centrifugal fan in explosion zero zone |
| CN114893452A (en) * | 2022-07-14 | 2022-08-12 | 沈阳透平机械股份有限公司 | Low-consumption balance gas centrifugal compressor |
-
2011
- 2011-03-07 CN CN2011200567729U patent/CN202007791U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573652A (en) * | 2012-07-20 | 2014-02-12 | 湖北省风机厂有限公司 | Steel-plate welded multistage high-speed oxygen supercharging blower |
| CN104343473A (en) * | 2014-09-02 | 2015-02-11 | 华中科技大学 | Shaft end seal device for organic working medium radial-inward-flow turbine |
| CN104343473B (en) * | 2014-09-02 | 2015-09-09 | 华中科技大学 | A kind of shaft end seal device for organic working medium radial-inward-flow turbine |
| CN106704558A (en) * | 2016-12-12 | 2017-05-24 | 重庆江增船舶重工有限公司 | Gearbox structure for centrifugal machine |
| CN106762793A (en) * | 2017-01-03 | 2017-05-31 | 山东钢铁股份有限公司 | A kind of device for preventing air blower shaft end sealing leak coal gas |
| CN106762793B (en) * | 2017-01-03 | 2023-02-28 | 山东钢铁股份有限公司 | Device for preventing shaft end of air blower from sealing and leaking coal gas |
| CN111120414A (en) * | 2019-12-13 | 2020-05-08 | 西安航天动力研究所 | Axial force balance structure and method for large-flow high-power precompression pump |
| CN114576183A (en) * | 2020-12-02 | 2022-06-03 | 中国石油化工股份有限公司 | Explosion-proof multistage centrifugal fan in explosion zero zone |
| CN114576183B (en) * | 2020-12-02 | 2024-05-03 | 中国石油化工股份有限公司 | Explosion-proof multistage centrifugal fan in explosion zero region |
| CN114893452A (en) * | 2022-07-14 | 2022-08-12 | 沈阳透平机械股份有限公司 | Low-consumption balance gas centrifugal compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111012 Termination date: 20160307 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |