CN87207494U - Static-pressure balancer for a centrifugal pump - Google Patents
Static-pressure balancer for a centrifugal pump Download PDFInfo
- Publication number
- CN87207494U CN87207494U CN 87207494 CN87207494U CN87207494U CN 87207494 U CN87207494 U CN 87207494U CN 87207494 CN87207494 CN 87207494 CN 87207494 U CN87207494 U CN 87207494U CN 87207494 U CN87207494 U CN 87207494U
- Authority
- CN
- China
- Prior art keywords
- ring
- centrifugal pump
- static
- rotating
- stationary
- 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.)
- Ceased
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a static-pressure balancer for a centrifugal pump, which relates to the balancing and sealing component of the pump. The static-pressure balancer for the centrifugal pump adopts an integral rectangular static and dynamic ring structure which are mutually adhered to end surfaces and can establish a liquid film; the pressure difference which is generated through balancing the diameter can bear axial force of the centrifugal pump; according to the principle of the static-pressure bearing, the static-pressure balancer for the centrifugal pump can pass through a small hole on the dynamic ring through making use of a high-pressure cavity; a static-pressure liquid film, a lubricating static and dynamic ring surface is formed among the end surfaces; the pressure difference generated through balancing the diameter can balance the axial force; since the thickness of the liquid film is very thin, and the sealing performance of the centrifugal pump is improved, the static-pressure balancer for the centrifugal pump is especially suitable for a multi-stage centrifugal pump which has specific rotating speed, small flow rate, and high lift.
Description
The utility model relates to the balance and the sealed member of pump.
The axial force that produces during centrifugal pump impeller work, general single-stage pump adopts the method for establishing equalizing orifice on impeller cover, and multistage pump adopts the structure of Balance disc, balancing drum or The combined to carry out balance.These structures all make a part be obtained the fluid of energy by impeller, passing hole channel and clearance leakage flow to the suction chamber of pump, reduced the volumetric efficiency of pump, particularly remarkable for low-specific-speed (being small flow, high-lift) multistage centrifugal pump, the volumetric efficiency of pump only is 70-80%.
The new structure that the purpose of this utility model provides a kind of energy balancing axial thrust and keeps sealing between rotating part and the stationary part, thus can make the pump proper functioning, and increase substantially the volumetric efficiency of pump.
The purpose of this utility model is to realize by the new structure of the working principle design of hydrostatic pressure sealing, promptly form the very thin static pressure liquid film of one deck between the rotating ring on the rotatingshaft and be lubricated being installed on the stationary ring on the water pump static part and being installed in, and come balancing axial thrust through the pressure difference that balance diameter produces by fluid, in addition because the liquid film thickness between the dynamic and static ring is very thin, the gap is very little, so the escape of liquid amount is also very little, played the effect of hydrostatic seal.During pump work, fluid is from the flow through aperture of certain diameter of hyperbaric chamber, flow into passage between the dynamic and static ring by rotating ring, because the effect of hydrodynamic pressure is pushed dynamic and static ring mutually open, form the static pressure liquid film, because its constant pressure, thereby liquid film has good axial stiffness and inclination rigidity, can bear axial float and circular runout, keeps the stability of work.The structure of passage also can be designed to oblique plane type and salient shoulder type swivel becket except groove aperture formula swivel becket.
Accompanying drawing is the structural representation of static balance device.1 is the rotatingshaft of pump among the figure; 2 is axle sleeve; 3 is rotating seat; 4 is rotating ring; 5 is stationary ring; 6 is stationary seat; 7 is lining; 8 is spring; 9 is gland; 10 are the protection shoulder.
Concrete structure of the present utility model is described by drawings and Examples.
The gland left side is a hyperbaric chamber, the aperture of fluid from axle sleeve through rotating seat and rotating ring the duct and enter junction plane between dynamic and static ring, one section aperture (this aperture is located on the rotating seat among the figure) of making is on request arranged with pressure and fluid flow between the control junction plane in the duct, have the passage (being the recessing form among the figure) of structural types such as semi-circular recesses or inclined-plane on the rotating ring junction plane, 1 millimeter of the degree of depth of groove, R is 1 millimeter and is advisable that the end face gradient is within 1 ° ± 0.1 °.High-pressure liquid engaging friction face is pushed dynamic and static ring mutually open during work, forms stable static pressure liquid film, the fluid one side, and some is replenished from aperture on the one hand from the clearance leakage between stationary ring and lining.The fluid that leaks enters the low-pressure cavity on gland right side, and is sent back to the fluid input place of pump.Between rotating seat and axle sleeve, rotating ring and the seal arrangement that all is provided with O-ring seals between stationary seat and stationary ring, gland, to prevent the hyperbaric chamber escape of liquid.O-ring seals and spring play the floating shock-absorbing effect, to prevent the stress that materials hot deformation and stress deformation are produced and to bear short-term pressure.The dynamic and static ring pairing material is selected silicon nitride and Tungsten carbite or silicon carbide and Tungsten carbite for use; the powdered metallurgical material compacting forms; whole rectangular ring can obtain satisfied using effect; in order to guarantee that dynamic and static ring is when running up; reason centrifugal force is excessive and be damaged; all be assemblied in the chamber of ring seat, design has protection shoulder 10 on the ring seat.
For the balance diameter of axle is that 76 millimeters, rotating speed are 7460 rev/mins, medium working pressure difference be 172 kgfs/centimetre
2, fill pump on the multistage centrifugal, hole diameter is the 0.75-1 millimeter, when oil slick thickness is the 6-15 micron, by static balance device test result, pressure medium low-pressure cavity be the 2-3.5 kgf/centimetre
2Leakage rate is stabilized in 10 liters/minute (0.6 meter
3/ time), by the test contrast,, can raise the efficiency 10% than adopting balancing drum+Balance disc structure.
When the static balance device used, working medium should be the fluid that cleans.
Claims (5)
1, centrifugal pump static balance device, it is made up of rotating part that bears axial force and stationary part branch, between rotating part and the stationary part certain interval is arranged, the even part (rotating ring and stationary ring) that it is characterized in that the pairing of rotating part and stationary part respectively is holistic rectangular ring, on rotating ring, have the fluid passage, the aperture that one section control hydrodynamic pressure and flow are wherein arranged, the diameter of aperture is a balance diameter, aperture is connected with the rotating ring working surface, is shaped on groove or convex shoulder on the working surface or makes the plane that has gradient.
2,, it is characterized in that what dynamic and static ring was formed by silicon nitride and Tungsten carbite or silicon carbide and the compacting of tungsten carbide powder powder metallurgy material respectively according to the said centrifugal pump static balance of claim 1 device; Balance diameter is the 0.75-1 millimeter.
3, according to claim 1 and 2 said centrifugal pump static balance devices, it is characterized in that the groove on the rotating ring working surface is the semi-circular groove of R1, the degree of depth is 1 millimeter.
4, according to claim 1 and 2 said centrifugal pump static balance devices, it is characterized in that having the high speed protective gear, promptly rotating ring and stationary ring are installed in respectively in the chamber of rotating seat and stationary seat, and ring seat is provided with protection shoulder 10.
5, according to claim 1 and 2 said centrifugal pump static balance devices, it is characterized in that having damping and floating installation, i.e. rotating seat and axle sleeve are between rotating ring; All be provided with O-ring seals between stationary seat and stationary ring, the gland, also be provided with spring between stationary seat and the gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87207494 CN87207494U (en) | 1987-09-15 | 1987-09-15 | Static-pressure balancer for a centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87207494 CN87207494U (en) | 1987-09-15 | 1987-09-15 | Static-pressure balancer for a centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87207494U true CN87207494U (en) | 1988-03-09 |
Family
ID=4822926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87207494 Ceased CN87207494U (en) | 1987-09-15 | 1987-09-15 | Static-pressure balancer for a centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87207494U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318753C (en) * | 2002-07-31 | 2007-05-30 | 菲利普·吉特勒 | Seal for use between two mobile parts of a hydraulic machine |
| CN102116309A (en) * | 2010-12-30 | 2011-07-06 | 上海阿波罗机械股份有限公司 | Mechanical sealing device for centrifugal pump |
| CN102852815A (en) * | 2011-06-27 | 2013-01-02 | 王喜冬 | Hard alloy amphibious sand pump capable of being idled and connected in series |
| CN102852814A (en) * | 2011-06-27 | 2013-01-02 | 王喜冬 | Hard alloy amphibious sand pump capable of being idled and connected in series |
| CN102852813A (en) * | 2011-06-27 | 2013-01-02 | 王喜冬 | Hard alloy amphibious sand pump capable of being idled and connected in series |
| CN103644302A (en) * | 2013-12-24 | 2014-03-19 | 四川日机密封件股份有限公司 | Mechanical sealing device capable of being adaptively deformed with pressure |
-
1987
- 1987-09-15 CN CN 87207494 patent/CN87207494U/en not_active Ceased
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318753C (en) * | 2002-07-31 | 2007-05-30 | 菲利普·吉特勒 | Seal for use between two mobile parts of a hydraulic machine |
| CN102116309A (en) * | 2010-12-30 | 2011-07-06 | 上海阿波罗机械股份有限公司 | Mechanical sealing device for centrifugal pump |
| CN102116309B (en) * | 2010-12-30 | 2012-07-25 | 上海阿波罗机械股份有限公司 | Mechanical sealing device for centrifugal pump |
| CN102852815A (en) * | 2011-06-27 | 2013-01-02 | 王喜冬 | Hard alloy amphibious sand pump capable of being idled and connected in series |
| CN102852814A (en) * | 2011-06-27 | 2013-01-02 | 王喜冬 | Hard alloy amphibious sand pump capable of being idled and connected in series |
| CN102852813A (en) * | 2011-06-27 | 2013-01-02 | 王喜冬 | Hard alloy amphibious sand pump capable of being idled and connected in series |
| CN102852814B (en) * | 2011-06-27 | 2015-07-15 | 王喜冬 | Hard alloy amphibious sand pump capable of being idled and connected in series |
| CN102852815B (en) * | 2011-06-27 | 2015-07-15 | 王喜冬 | Hard alloy amphibious sand pump capable of being idled and connected in series |
| CN102852813B (en) * | 2011-06-27 | 2016-03-02 | 王喜冬 | Cemented carbide idle running can be connected amphibious husky pump |
| CN103644302A (en) * | 2013-12-24 | 2014-03-19 | 四川日机密封件股份有限公司 | Mechanical sealing device capable of being adaptively deformed with pressure |
| CN103644302B (en) * | 2013-12-24 | 2016-07-06 | 四川日机密封件股份有限公司 | The mechanically-sealing apparatus that can be adaptively deformed with pressure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5980114A (en) | Thrust bearing | |
| Kazama et al. | Application of a mixed lubrication model for hydrostatic thrust bearings of hydraulic equipment | |
| US4671677A (en) | Fluid seal with shaft excursion compensation | |
| US10731656B2 (en) | Self-adjusting drum system | |
| CN105465371A (en) | Bidirectional-rotation self-pumping fluid dynamic pressure type mechanical seal | |
| CN105508620B (en) | It is a kind of acted on using gas differential pressure realize float from concentric seal and its installation method | |
| CN87207494U (en) | Static-pressure balancer for a centrifugal pump | |
| CN101133251B (en) | Rotor sliding-vane machine | |
| CN212003608U (en) | Small-flow high-lift multistage centrifugal pump | |
| CN113107892A (en) | Magnetic force type balance disc for pump | |
| US2604050A (en) | Centrifugal pump impeller seal ring | |
| CN104019024A (en) | Leakproof dynamic pressure type valve plate | |
| CN1006321B (en) | Balance unit for pump axial force | |
| CN210344284U (en) | Mechanical sealing device of high-speed high-pressure hydraulic pump | |
| CN203257885U (en) | Sliding bearing with pressure maintaining ring | |
| CN213540823U (en) | Sealing device of turbine shaft | |
| CN205689605U (en) | A kind of magnetic lubrication sliding bearing | |
| CN2331793Y (en) | Magnetic-fluid liquid-film sealing device | |
| CN209976795U (en) | Non-sealing non-axial force high-efficiency single-stage fast-assembling centrifugal pump | |
| CN207316075U (en) | A kind of float grease seal | |
| JPH0517399B2 (en) | ||
| US3692373A (en) | Slipper bearing lubrication and seal | |
| CN110513324A (en) | Reactor coolant pump Hydrostatic die mould mechanical seal | |
| LU500195B1 (en) | Helical tooth double circular arc tooth profile hydraulic gear pump capable of realizing dynamic and static pressure floating support of shaft end | |
| CN219974578U (en) | Brake wheel for balancing axial force of expander |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |