CN201687720U - High-pressure multi-stage pump - Google Patents
High-pressure multi-stage pump Download PDFInfo
- Publication number
- CN201687720U CN201687720U CN2010201644037U CN201020164403U CN201687720U CN 201687720 U CN201687720 U CN 201687720U CN 2010201644037 U CN2010201644037 U CN 2010201644037U CN 201020164403 U CN201020164403 U CN 201020164403U CN 201687720 U CN201687720 U CN 201687720U
- Authority
- CN
- China
- Prior art keywords
- end cap
- inner housing
- frame
- pump
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A high-pressure multi-stage pump is mainly used for supplying high-pressure fluid to other equipment. The high-pressure multi-stage pump consists of a cylindrical outer casing, an inner casing, an end cap, a pump spindle and a row of impellers mounted on the pump spindle, wherein the inner casing is embedded in the outer casing, the end cap is mounted at the opening end of the outer casing and has axial sealing functions, the pump spindle is supported by the inner casing and the end cap, and a suction chamber of one of the impellers is close to the end cap of the pump and communicated with a space formed by the outer casing, the inner casing and the end cap. A radial flange is protruded at a position of the inner casing close to the end of the end cap and matches with the outer casing so as to divide an area formed by a water outlet, the outer casing, the inner casing and the end cap, and the pressure at the water outlet is much higher than that of the suction chamber of the impeller closed to the end cap, namely the pressure of the area formed by the outer casing, the inner casing and the end cap. Simultaneously, an annular seal ring is mounted at the flange of the inner casing, and then fluid seeping from the water outlet to the area formed by the outer casing, the inner casing and the end cap is reduced further, thereby preventing impacting the end cap.
Description
Affiliated technical field
The utility model relates to fluid machinery engineering field, particularly a kind of high-pressure multi-stage pump that is widely used in boiler feed water.
Background technique
At present, traditional high-pressure multi-stage pump is the frame by tubular, inner housing, end cap, pump shaft and be contained in one on pump shaft row impeller and form.Inner housing divides upper shell and lower shell body two-part, and frame is a tubular structure, is embedded in the inner housing outside, and end cap is installed near outside the axially open of frame.The end cap bolt, the space that is made of frame, inner housing, end cap communicates with water outlet, and bear pressure because of end cap is required identical with water outlet pressure, must strengthen the end cap thickening for improving reliability, need to use large diameter bolt, and can cause waste of material like this and influence its stability.
Summary of the invention
Many and exist security hidden trouble, the utility model that a kind of high-pressure multi-stage pump is provided in order to overcome conventional high-tension multistage pump material requested, not only can effectively reduce requirement, and greatly improve the stability of high-pressure multi-stage pump operation ending cover thickness.
Realize the technological scheme of above-mentioned purpose: the high-pressure multi-stage pump is by the frame of tubular, inner housing, end cap, pump shaft and be contained in the row of one on pump shaft impeller and form.Inner housing is embedded in the frame, and end cap is installed in the frame opening end, plays the axial seal effect, and pump shaft is by inner housing and endcap support, and wherein the suction chamber of third level impeller is near the end cap of pump, and communicates with the space that is made of frame, inner housing, end cap.The close pump end caps of inner housing has flange radially, flange matches with frame, water outlet and the space of being made up of frame, inner housing and end cap are separated, water outlet place pressure is much larger than near the pressure of end caps third level impeller suction chamber, i.e. the pressure in the zone of being made up of frame, inner housing and end cap.Simultaneously, the place is equipped with O-ring seal at the inner housing flange, further reduces water outlet place fluid and leaks into the zone of being made up of frame, inner housing and end cap, brings impact with the exempt from customs examination end cap.End caps pressure is about 1/2nd of conventional high-tension multistage pump, so the thickness of required end cap can be reduced, has reduced the use amount of material.Simultaneously, improved the reliability and stability of high-pressure multi-stage pump.
The utility model has the advantages that end caps pressure is about 1/2nd of conventional high-tension multistage pump, so the thickness of required end cap can be reduced, has reduced the use amount of material.Simultaneously, improved the reliability and stability of high-pressure multi-stage pump.
The utility model is on probation through the user, and reaction effect is good.
Description of drawings
Fig. 1 is the overall schematic of high-pressure multi-stage pump;
Fig. 2 is the zoomed-in view at 4 places among Fig. 1.
1. bolts of cover among Fig. 1,2. end cap, 3. seal ring, 4. mark, 5. water outlet, 6. stator, 7. inner housing, 8. frame, 9. water intake, 10. mechanical seal, 11. radial bearings, 12. pump shafts, 13. bearing bracket stand, 14. impeller a, 15. impeller b, 16. impellers are at d, 17. impeller c, the suction chamber of the 18. flange 19. impeller c of inner housing place, 20. supports, 21. thrust-bearings, 22. radial bearing, 23. mechanical seals, 24. spaces of forming by end cap, frame, inner housing.
Among Fig. 2,31. frame inwalls, 32. O-ring seals, 33. framies, 34. inner housings, the radial flange on 35. inner casings, the outer wall of 36. flanges
Embodiment
This kind high-pressure multi-stage pump is by the frame (8) of tubular, inner housing (7), and end cap (2), pump shaft (12) and be contained in the row of one on pump shaft impeller (14), (15), and (16), (17) are formed.Inner housing (7) is embedded in the frame (7), end cap (2) is installed in frame (8) opening end, pump shaft (12) is supported by inner housing (7) and end cap (2), the suction chamber of an impeller (17) wherein is near the end cap (2) of pump, and communicates with the space (24) that is made of frame (8), inner housing (7), end cap (2).
One row's impeller (14) is housed, (15), (16) in the inner housing, (17), pump shaft (12) passes the center hole of impeller, and passes inner housing (7) and end cap (2) along axis, holds by a radial bearing (11) and bearing bracket (13) away from the pump shaft (12) of pump cover (2) and supports.Simultaneously, between inner housing (7) and pump shaft (12), mechanical seal (10) is housed.
Close end cap (2) end of pump shaft (12) supports by another radial bearing (22) and support (20), thrust-bearing (21) is housed to slow down impact on support (20).The mechanical seal (23) of dress between end cap (2) and pump shaft (12).
Impeller a (14), b (15) is respectively a sencond stage impeller, it is operated in low pressure area (A), impeller c (17), d (16) is respectively three level Four impellers, and it is operated in zone of high pressure B.Impeller a (14), b (15), impeller c (17), d (16) installs with back-to-back form.Impeller a (14), the water sucking mouth of b (15) is outside vertically, impeller c (17), the water outlet of d (16) is also outside vertically, and fluid enters inner housing (7) after introducing from water intake, through impeller a (14), b (15), impeller c (17), discharge from water outlet (5) with higher pressure d (16) classification pressurization back.
Fig. 2 is the zoomed-in view at label 4 places among Fig. 1.As shown in Figure 2, inner housing (7) is gone up near end cap (2) and is located radially a flange (18), and flange (18) is near end cap (2), and end cap (2) is fixed together by bolt (1) and frame (8).End cap (2) is installed in the direction of frame (8) opening along pump shaft (12).Inwall (31) connecting part of outer wall of flange (36) and frame, O-ring seal (32) is installed in the outer rim of inner housing and the inwall of frame (31) is located, and with flange (35) connecting part, seal ring seals, and seals up the gap between inner walls (31) and the inner housing flange (35).So water outlet no longer communicates with the space of being made up of frame, inner housing, pump cover (24).The space (24) that frame, inner housing, pump cover are formed, communicate with the suction chamber of impeller c (17), the pressure of its suction chamber is identical with the pressure in the space of being made of (24) frame, inner housing, pump cover, the suction chamber inner fluid of impeller c (17) is located to flow into by the stator (6) of sencond stage impeller b, so that space (24) pressure of frame, inner housing, pump cover composition and the stator (6) of sencond stage impeller b are located pressure is identical.
The water outlet pressure P
fAnd between the stator place pressure of sencond stage impeller b following relation can be arranged:
P
f＝2P+P
s
Wherein, P is the pressure size that the single-stage impeller increases fluid, P
sIt is the suction pressure of pump.If suction pressure P
sMuch smaller than total pressure, following formula can be reduced to
2P＝P
d/2
Wherein, P
dBe delivery side of pump pressure.Therefore, the pressure in end caps is approximately 1/2nd of outlet pressure.
In summary, the pressure of end caps is much smaller than the pressure of pump discharge, and the pressure of the end caps of conventional high-tension multistage pump equals the pressure of pump discharge. Therefore, the pretension intensity of the thickness of end cap, bolt and diameter are all little than Traditional Multistage Pump. Equally, the minimizing of the pressure between shell body and end cap has also improved the reliability of packing ring.
Claims (4)
1. high-pressure multi-stage pump, frame (8) by tubular, inner housing (7), end cap (2), pump shaft (12) and be contained in one on the pump shaft (12) row impeller (14) (15) (16) (17) and form, it is characterized in that: inner housing (7) is embedded in the frame (8), end cap (2) is installed in frame (8) opening end, pump shaft (12) is supported by inner housing (7) and end cap (2), wherein locate the suction chamber (19) of impeller near the end cap (2) of pump, with by frame (8), inner housing (7), the space that end cap (2) constitutes communicates, inner housing (7) is located height near pump cover end (2) radially flange (18), in inner housing (7) outer rim and frame (8) inner edge place O-ring seal (32) is installed.
2. high-pressure multi-stage pump according to claim 1, it is characterized in that inner housing (7) locates height and have flange (18) radially to want to cooperate with frame (8) inwall near pump cover end (2), water outlet (5) and the zone be made up of frame (8), inner housing (7) and end cap (2) are separated.
3. high-pressure multi-stage pump according to claim 1 is characterized in that in inner housing (7) outer rim and frame (8) inner edge place O-ring seal (32) being installed.
4. high-pressure multi-stage pump according to claim 1, it is characterized in that the flange (18) of inner housing (7) and the inwall of frame (8) separate water outlet (5) and the zone of being made up of frame (8), inner housing (7) and end cap (2), middle by O-ring seal sealing (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201644037U CN201687720U (en) | 2010-04-19 | 2010-04-19 | High-pressure multi-stage pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201644037U CN201687720U (en) | 2010-04-19 | 2010-04-19 | High-pressure multi-stage pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201687720U true CN201687720U (en) | 2010-12-29 |
Family
ID=43376003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201644037U Expired - Fee Related CN201687720U (en) | 2010-04-19 | 2010-04-19 | High-pressure multi-stage pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201687720U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852826A (en) * | 2012-09-17 | 2013-01-02 | 山东德源泵业有限公司 | Large water flow self-balancing submersible electric pump |
-
2010
- 2010-04-19 CN CN2010201644037U patent/CN201687720U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852826A (en) * | 2012-09-17 | 2013-01-02 | 山东德源泵业有限公司 | Large water flow self-balancing submersible electric pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206503730U (en) | Immersible pump | |
| CN201687720U (en) | High-pressure multi-stage pump | |
| RU2669133C1 (en) | Method for manufacturing a cast body of a radial turbohydraulic power plant, prefabricated cast model of a body (variants), typical series of bodies | |
| CN2775360Y (en) | Support type submerged pump | |
| CN1784545A (en) | Screw type liquid ring pump | |
| CN208040727U (en) | It is a kind of energy-efficient without blocking multi-level submerged pump | |
| CN208294784U (en) | Tangent type low specific speed immersible pump | |
| CN202418008U (en) | Improved vertical pump | |
| CN108291543A (en) | Multi-stage rotary vane pump | |
| CN105604957A (en) | Automatic self-priming pressure pump | |
| CN203500044U (en) | Segmented high-lift multistage submersible sand discharging pump | |
| CN108869282B (en) | A kind of compressor | |
| CN104047848B (en) | Vortex air compressor with built-in suction valve | |
| CN101029646A (en) | Fished chemical industry pump | |
| CN102748282A (en) | Horizontal vortex air compressor for oil injection | |
| CN201144827Y (en) | Vertical type non-sealed self-suction oil pump | |
| CN205841220U (en) | High intensity staged horizontal water pump | |
| CN106762676A (en) | A kind of centrifugal multistage pump multiple centrifugal pump delivery chamber | |
| CN202108739U (en) | Hard alloy idling serial amphibious mining vertical pump | |
| WO2013187801A3 (en) | Downhole pump assembly | |
| CN205744475U (en) | A kind of double-stage self priming pump of band spiral pumping chamber | |
| CN2491636Y (en) | Combined modularized tangent pump | |
| CN205478303U (en) | Water -ring vacuum pump | |
| CN102852808A (en) | Hard-alloy amphibious mining vertical pump capable of idling and being in series connection | |
| CN207261315U (en) | Boosting energy-saving water pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20130419 |