CN203627332U - Isolation cylinder for preventing centrifugal drum pressure fan air flow from separation by crystallization - Google Patents
Isolation cylinder for preventing centrifugal drum pressure fan air flow from separation by crystallization Download PDFInfo
- Publication number
- CN203627332U CN203627332U CN201320673730.9U CN201320673730U CN203627332U CN 203627332 U CN203627332 U CN 203627332U CN 201320673730 U CN201320673730 U CN 201320673730U CN 203627332 U CN203627332 U CN 203627332U
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- Prior art keywords
- opening
- cylindrical shell
- crystallization
- cylinder body
- cylinder
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- Expired - Lifetime
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- 238000002425 crystallisation Methods 0.000 title claims abstract description 15
- 230000008025 crystallization Effects 0.000 title claims abstract description 14
- 238000002955 isolation Methods 0.000 title abstract 4
- 238000000926 separation method Methods 0.000 title abstract 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model discloses an isolation cylinder for preventing centrifugal drum pressure fan air flow from separation by crystallization. The isolation cylinder comprises an upper half shell body and a lower half shell body which are fixed after opposite buckling and form a cylinder body with openings in the two ends. The diameter of the horizontal section circle of the cylinder body is gradually increased in the axial direction of the cylinder body, so that an opening in one end is larger than an opening in the other end of the cylinder body, a locating stopping opening is formed in the outer edge of the end with the larger opening of the cylinder body, the cylinder body is arranged outside a main shaft of an air inlet side in a machine shell in a sleeved mode, and the end provided with the locating stopping opening is fixed at a shaft end air seal part through the locating stopping opening. The upper half shell body and the lower half shell body can be welded and can be connected through a screw. According to the isolation cylinder, a protecting zone is established on a low-temperature zone and a high-temperature zone, the influence factor which exists in an air inlet side flow channel and causes the problem that air inlet flow temperature is lower than 140 DEG C is avoided, and crystallization can be effectively avoided.
Description
Technical field
The utility model belongs to Compressor Technology field, is specifically related to a kind of for preventing the isolating cylinder of centrifugal blower air-flow crystallization.
Background technique
In the real gas blower or compressor that contain the dense media such as HCN, acetic acid, HOCH, under certain pressure, when temperature is separated out lower than dense media in the situation of critical value, there will be crystalline polamer, and that similar phenomenon shows in refrigerating compressor is very obvious.This phenomenon by analysis reason is as follows: 1) shaft end seal adopts the clean gas that fills N2 or the permission of other process systems to protect; the pressure of blanket gas just can play a protective role higher than working medium pressure; due to the other reasons such as source of the gas or system; can cause blanket gas to be leaked to compressor suction chamber inside; and the intake temperature of refrigerating compressor is generally greater than 145 ℃; this just there will be because the temperature of blanket gas is lower than the solidification point of medium; after mixing with the cold air that is greater than 145 ℃ lower than the blanket gas of solidification point, there will be low temperature area, thereby occur crystalline polamer.2) due to compressor air inlet side from bearing very close to, bearing oil is cooling, bearing portion maximum temperature is 95 ℃, now, on the main shaft from bearing to compressor air inlet runner, just have temperature gradient, also lower than the low-temperature zone of 140 ℃, in the time being greater than the working medium of 145 ℃ and contacting with relatively cold main shaft, also can there is dense media crystallisation problems.
The crystallization meeting that above-mentioned situation causes is directly bonded on the main shaft and impeller of impeller inlet section, thereby bring following problem: 1) make rotor occur non-uniform mass, thereby cause the imbalance of rotor, cause the vibration problem of rotor to occur, affect the mechanical stationarity of compressor operating; 2) because air-flow produces crystallization on refrigerating compressor inlet channel surface, can have a strong impact on the flow area of compressor bank air inlet, cause that compressor through-current capability reduces, compressor aeroperformance is reduced.
Due to the above-mentioned pneumatic and mechanical problem that crystallization causes, for refrigerating compressor, within general 1 month, just must shut down maintenance once, and overhaul frequently the output that can affect on the one hand device, also can bring on the other hand a large amount of maintenance workloads.
Summary of the invention
For the defect existing in above-mentioned prior art or deficiency; the object of the invention is to; provide a kind of for preventing the isolating cylinder of centrifugal blower air-flow crystallization; this isolating cylinder is by setting up a protected zone in low temperature area and high-temperature area; avoid in air inlet side runner existing causing charge air flow temperature lower than the influence factor of 140 ℃, can effectively avoid crystallization.
In order to achieve the above object, the utility model adopts following technological scheme:
A kind of for preventing the isolating cylinder of centrifugal blower air-flow crystallization, comprise upper half-shell and housing lower half, fixing after described upper half-shell and housing lower half make-up, form the cylindrical shell of both ends open, the cross section diameter of a circle of this cylindrical shell is along drum shaft to increasing gradually, make cylindrical shell one end large compared with the other end opening, the outer edge of one end that this cartridge openings is large is provided with positioning spigot; The main shaft outside of described barrel jacket air inlet side in casing, and the one end that is provided with positioning spigot is fixed in axle head hermetic seal by positioning spigot.
The utility model also comprises following other technologies feature:
Between described upper half-shell and housing lower half, can weld, also can be connected by screw.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the scheme of installation of the utility model in compressor.
Fig. 3 is the partial enlarged drawing of cylinder position in Fig. 2.
Gap schematic diagram when Fig. 4 is normal operation between main shaft and the utility model.
Gap schematic diagram when Fig. 5 cold conditions is installed between main shaft and the utility model.
Number in the figure: 1, upper half-shell; 2, housing lower half; 3, positioning spigot; 4, cylindrical shell; 5, main shaft; 6, bearing; 7, axle head hermetic seal; 8, suction chamber; 9, impeller; 10, casing.
Below in conjunction with the drawings and specific embodiments, the utility model is further explained.
Embodiment
As shown in Figure 1, Figure 2, Figure 3 shows, of the present utility model for preventing the isolating cylinder of drum pressure fan air-flow crystallization, comprise upper half-shell 1 and housing lower half 2, fixing after described upper half-shell 1 and housing lower half 2 make-ups, form the cylindrical shell 4 of both ends open, the cross section diameter of a circle of this cylindrical shell 4 axially increases gradually along cylindrical shell 4, makes cylindrical shell 4 one end large compared with the other end opening, and the outer edge of one end that these cylindrical shell 4 openings are large is provided with positioning spigot 3; Described cylindrical shell 4 is enclosed within main shaft 5 outsides of the interior air inlet side of casing 10, and the one end that is provided with positioning spigot 3 is fixed in axle head hermetic seal 7 by positioning spigot 3.
In working process time, between described upper half-shell 1 and housing lower half 2, can weld, also can be connected by screw.Referring to Fig. 4, Fig. 5, cylindrical shell cylindrical is according to the requirement on machining accuracy processing of runner, as air inlet runner face; Between cylindrical shell and main shaft, radial clearance is installed and is considered that heat rises, rotor is flexible and the displacement amount in running axle center in cold conditions, and the cylindrical shell during assurance runs well and the gap of main shaft excircle are evenly reliable; For the less unit of span, want evenly in the end face of cylindrical shell of the present utility model and impeller 9 gaps, wheel hub air inlet side end face.Notice that shaft end seal inflation pressure pressure reduction is constant, avoid overcharging.
The size of cylindrical shell 4 is determined according to actual main shaft specification and charge flow rate, guarantees to be enclosed within main shaft 5 outsides and does not affect normal operation.
Actual product running example:
When charge flow rate is at 1600～1900m
3when/min, the diameter of main shaft 5 is 240～270mm, and now, the length of cylindrical shell 4 is 350～400mm, and cylindrical shell 4 is 1～3mm with the minimum clearance of main shaft 4.The sidewall thickness of cylindrical shell 4 is 20mm-30mm.
Claims (2)
1. one kind for preventing the isolating cylinder of centrifugal blower air-flow crystallization, it is characterized in that, comprise upper half-shell (1) and housing lower half (2), fixing after described upper half-shell (1) and housing lower half (2) make-up, form the cylindrical shell (4) of both ends open, the cross section diameter of a circle of this cylindrical shell (4) axially increases gradually along cylindrical shell (4), makes cylindrical shell (4) one end large compared with the other end opening, and the outer edge of one end that this cylindrical shell (4) opening is large is provided with positioning spigot (3); Described cylindrical shell (4) is enclosed within main shaft (5) outside of the interior air inlet side of casing (10), and the one end that is provided with positioning spigot (3) is fixed in axle head hermetic seal (7) by positioning spigot (3).
2. as claimed in claim 1ly it is characterized in that for preventing the isolating cylinder of centrifugal blower air-flow crystallization, between described upper half-shell (1) and housing lower half (2), can weld, also can be connected by screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320673730.9U CN203627332U (en) | 2013-10-29 | 2013-10-29 | Isolation cylinder for preventing centrifugal drum pressure fan air flow from separation by crystallization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320673730.9U CN203627332U (en) | 2013-10-29 | 2013-10-29 | Isolation cylinder for preventing centrifugal drum pressure fan air flow from separation by crystallization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203627332U true CN203627332U (en) | 2014-06-04 |
Family
ID=50813814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320673730.9U Expired - Lifetime CN203627332U (en) | 2013-10-29 | 2013-10-29 | Isolation cylinder for preventing centrifugal drum pressure fan air flow from separation by crystallization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203627332U (en) |
-
2013
- 2013-10-29 CN CN201320673730.9U patent/CN203627332U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140604 |