FIELD: pumps.
SUBSTANCE: invention relates to end seals of rotors of pump units for separation of media or pressure difference. Invention can be used in pumps used at nuclear power stations, in particular, main circulation pumps. Multistage design of face seal comprises series-arranged working stages and end stage each of which includes located on a shaft a rotary element and in contact with it a spring-loaded axially movable stator element, sealed relative to housing by sealing rings wherein cavities of high and low pressure of working stages are connected in series with throttle holes in stator element, that is designed to execute function of axially moving sealed relative to housing of stepped piston. Here is disclosed a formula dependency of outer diameters of stages of piston of stator element. Said ratio provides absence of additional force on stator element during its normal operation, enabling, in case of seal opening, enhancing effect on stator element for closing seal, due to hydrostatic forces acting on piston.
EFFECT: higher reliability and manufacturability of parts and assembling of seal.
1 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| UNIT OF END FACE SEALS | 1995 |
|
RU2084730C1 |
| TURBOJET ENGINE ROTOR SHAFT SUPPORT (VERSIONS), TURBOJET ENGINE ROTOR SHAFT SUPPORT BODY, JET TURBINE ENGINE ROTOR SHAFT SUPPORT ROLLER BEARING HOUSING, TURBOJET ENGINE ROTOR SHAFT SUPPORT SEALING STAGES | 2015 |
|
RU2603386C1 |
| STOP SEAL OF CENTRIFUGAL COMPRESSOR | 2012 |
|
RU2482363C1 |
| TURBOJET ENGINE ROTOR SHAFT SUPPORT (VERSIONS), TURBOJET ENGINE ROTOR SHAFT SUPPORT GARTER SEAL, TURBOJET ENGINE ROTOR SHAFT SUPPORT SEALING GARTER ASSEMBLY, TURBOJET ENGINE ROTOR SHAFT SUPPORT GARTER SEAL RING SECTION | 2015 |
|
RU2603389C1 |
| TURBOJET ENGINE ROTOR SHAFT GARTER SEAL, TURBOJET ENGINE ROTOR SHAFT SEALING GARTER, JET TURBINE ENGINE GARTER SEAL CONTACT BUSHING, TURBOJET ENGINE ROTOR SHAFT SUPPORT | 2015 |
|
RU2603387C1 |
| ROTOR SHAFT BEARING OF LOW-PRESSURE COMPRESSOR OF TURBOJET ENGINE (VERSIONS), SEALING SPOOL OF ROTOR SHAFT BEARING, ROTOR SHAFT BEARING BLOCK, CONTACT HUB OF ROTOR SHAFT BRACELET SEALING, OIL-CONTROL RING OF ROTOR SHAFT | 2016 |
|
RU2614017C1 |
| MASTER CYLINDER OF VEHICLE TWO-CIRCUIT HYDRAULIC BRAKE SYSTEM | 1992 |
|
RU2043226C1 |
| BALL COCK | 0 |
|
SU1639437A3 |
| TURBODRILL-REDUCTION GEAR | 2002 |
|
RU2198994C1 |
| SUPPORT OF SHAFT ROTOR OF LOW-PRESSURE COMPRESSOR OF GAS TURBINE ENGINE (VERSIONS), BODY OF SHAFT SUPPORT AND BODY OF BALL-BEARING ROTOR SHAFT SUPPORT | 2016 |
|
RU2614020C1 |
