EP2642125A1 - Pompe à liquide à vis jumelée - Google Patents

Pompe à liquide à vis jumelée Download PDF

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Publication number
EP2642125A1
EP2642125A1 EP10859796.4A EP10859796A EP2642125A1 EP 2642125 A1 EP2642125 A1 EP 2642125A1 EP 10859796 A EP10859796 A EP 10859796A EP 2642125 A1 EP2642125 A1 EP 2642125A1
Authority
EP
European Patent Office
Prior art keywords
rotor
cavity
motor
double
screw
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.)
Withdrawn
Application number
EP10859796.4A
Other languages
German (de)
English (en)
Other versions
EP2642125A4 (fr
Inventor
Yan Tang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Power Technology Screw Machinery Co Ltd
Original Assignee
Shanghai Power Technology Screw Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Power Technology Screw Machinery Co Ltd filed Critical Shanghai Power Technology Screw Machinery Co Ltd
Publication of EP2642125A1 publication Critical patent/EP2642125A1/fr
Publication of EP2642125A4 publication Critical patent/EP2642125A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/045—Heating; Cooling; Heat insulation of the electric motor in hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008—Prime movers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0096—Heating; Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the present invention relates to the field of Organic Rankin Cycle (ORC) technology, specifically to an ORC power generation system, and more specifically to a double-screw liquid pump of the ORC power generation system.
  • ORC Organic Rankin Cycle
  • Fig 1 is a typical ORC, which includes an expander 1', a generator 2', an evaporator 3', a liquid pump 4' and a condenser 5'.
  • a low-temperature and low-pressure liquid refrigerant is pressurized in the liquid pump 4', and then enters the evaporator 3' to be evaporated through heating until the refrigerant becomes an overheated gas (high temperature and high pressure).
  • the overheated gas enters the expander 1' to work through expansion, so as to drive the generator 2' to generate power.
  • the low-temperature and low-pressure gas enters the condenser 5' and is condensed to liquid, and then flows back into the liquid pump 4', thus completing a cycle.
  • the gear pump has the following defects: in the gear pump, one gear always drives another gear, and half of the consumed work is consumed during a driving process; meanwhile, in the ORC cycle, liquid viscosity is usually low, and the gear wears easily.
  • the centrifugal pump has the following defect: after the centrifugal pump sucks the liquid, a pressure during the suction process is decreased, and the liquid evaporates easily, which causes efficiency of the centrifugal pump to decrease, thereby affecting efficiency of the entire ORC cycle.
  • the open-type liquid pump has the following defect: the refrigerant leaks easily through a shaft seal.
  • the technical problem to be solved by the present invention is to provide a double-screw liquid pump, in which a resistance torque of a female rotor is very small, and the liquid pump does not wear even when the liquid viscosity is very low, contributing to good reliability.
  • the present invention adopts the following technical solution.
  • a double-screw liquid pump comprising a semi-sealed or fully sealed shell, wherein the shell comprises a first cavity and a second cavity isolated from each other; a motor is disposed in the first cavity, and a main body part of a double-screw is disposed in the second cavity; at least one rotor of the double-screw is fixedly connected to a rotor of the motor, and the double-screw rotates through driving of the motor; a liquid refrigerant injection inlet and a refrigerant outlet are disposed on the first cavity, and the motor is cooled through evaporation of the liquid refrigerant; a liquid inlet and a liquid outlet are disposed on the second cavity.
  • the double-screw comprises a male rotor and a female rotor, and a first end of the male rotor is fixedly connected to the rotor of the motor.
  • the male rotor comprises a rotor part and a connection part which are integrally designed; the rotor part is disposed in the second cavity and coordinates with the female rotor; the connection part extends into the motor in the first cavity; the first cavity and the second cavity are isolated from each other through an isolation mechanism, so that a hole is formed between the first cavity and the second cavity; the connection part passes through the hole and enters the first cavity, and an end of the connection part away from the rotor part is fixedly connected to the rotor of the motor.
  • a first male rotor bearing is disposed at a second end of the male rotor away from the motor, and female rotor bearings are separately disposed at two ends of the female rotor.
  • a second male rotor bearing is disposed at the connection part and between the rotor part of the male rotor and the rotor of the motor.
  • connection part and an end of the second male rotor bearing close to the rotor of the motor are sealed through a shaft seal.
  • the motor is an inverter motor or a motor with a fixed rotating speed.
  • the present invention has the following beneficial effects: in the double-screw liquid pump applied to the ORC provided in the present invention, since a resistance torque of the female rotor is very small, the liquid pump does not wear even when the liquid viscosity is very low, contributing to good reliability, and thereby improving power generation efficiency of the ORC.
  • the semi-sealed or fully sealed shell can effectively prevent leakage of the refrigerant.
  • Fig. 2 shows an ORC power generation system using the present invention.
  • the ORC power generation system includes a condenser 5, a liquid pump 4, an evaporator 3, an expander 1, and a generator 2.
  • the main improvement of the present invention is the liquid pump 4.
  • the liquid pump 4 is a double-screw liquid pump 4.
  • the double-screw liquid pump 4 includes a semi-sealed or fully sealed shell.
  • the shell is formed of multiple components, and a seal ring 406 is disposed at each gap between components.
  • the shell includes a first cavity and a second cavity isolated from each other.
  • a motor 401 is disposed in the first cavity, and a main body part of a double-screw is disposed in the second cavity. At least one rotor of the double-screw is fixedly connected to a rotor of the motor.
  • the double-screw rotates through driving of the motor 401.
  • a dynamic source of the motor 401 may be from electric energy generated by the ORC power generation system.
  • a liquid refrigerant injection inlet 409 and a refrigerant outlet 410 are disposed on the first cavity, and the motor 401 is cooled through evaporation of the liquid refrigerant.
  • a liquid inlet 407 and a liquid outlet 408 are disposed on the second cavity.
  • the motor may be an inverter motor or a motor of a fixed rotating speed, and definitely may be an ordinary motor.
  • the double-screw liquid pump includes a male rotor 402, and a female rotor 403.
  • a first end of the male rotor 402 is fixedly connected to the rotor of the motor 401.
  • the male rotor 402 includes a rotor part and a connection part which are integrally designed.
  • the rotor part is disposed in the second cavity and coordinates with the female rotor 403.
  • the connection part extends into the motor 401 in the first cavity.
  • the first cavity and the second cavity are isolated from each other through an isolation mechanism, so that a hole is formed between the first cavity and the second cavity; the connection part passes through the hole and enters the first cavity, and an end of the connection part away from the rotor part is fixedly connected to the rotor of the motor 401.
  • a first male rotor bearing 4041 is disposed at a second end of the male rotor 402 away from the motor 401.
  • Female rotor bearings 405 are separately disposed at two ends of the female rotor 403.
  • a second male rotor bearing 4042 is disposed at the connection part and between the rotor part of the male rotor and the rotor of the motor. The connection part and an end of the second male rotor bearing 4042 close to the rotor of the motor are sealed through a shaft seal 411.
  • the liquid pump since a resistance torque of the female rotor is very small, the liquid pump does not wear even when the liquid viscosity is very low, contributing to good reliability, and thereby improving power generation efficiency of the ORC.
  • the semi-sealed or fully sealed shell can effectively prevent leakage of the refrigerant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP10859796.4A 2010-11-16 2010-11-30 Pompe à liquide à vis jumelée Withdrawn EP2642125A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010548653.5A CN101975160B (zh) 2010-11-16 2010-11-16 双螺杆液体泵
PCT/CN2010/079291 WO2012065320A1 (fr) 2010-11-16 2010-11-30 Pompe à liquide à vis jumelée

Publications (2)

Publication Number Publication Date
EP2642125A1 true EP2642125A1 (fr) 2013-09-25
EP2642125A4 EP2642125A4 (fr) 2016-11-16

Family

ID=43575066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10859796.4A Withdrawn EP2642125A4 (fr) 2010-11-16 2010-11-30 Pompe à liquide à vis jumelée

Country Status (4)

Country Link
US (1) US20130236334A1 (fr)
EP (1) EP2642125A4 (fr)
CN (1) CN101975160B (fr)
WO (1) WO2012065320A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020109553A1 (fr) * 2018-11-30 2020-06-04 Nidec Gpm Gmbh Pompe à vis pour refroidir de batteries

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5751885B2 (ja) * 2011-03-29 2015-07-22 株式会社神戸製鋼所 発電システム及び発電装置
DE102017210770B4 (de) * 2017-06-27 2019-10-17 Continental Automotive Gmbh Schraubenspindelpumpe, Kraftstoffförderaggregat und Kraftstofffördereinheit
DE102017218287B4 (de) * 2017-10-12 2021-12-23 Vitesco Technologies GmbH Kraftstoffpumpe und Kraftstofffördereinheit
DE102019103470A1 (de) * 2019-02-12 2020-08-13 Nidec Gpm Gmbh Elektrische Schraubenspindel-Kühlmittelpumpe
EP3816446A1 (fr) * 2019-10-31 2021-05-05 Illinois Tool Works Inc. Circuit de refroidissement d'un vehicule automobile

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020109553A1 (fr) * 2018-11-30 2020-06-04 Nidec Gpm Gmbh Pompe à vis pour refroidir de batteries

Also Published As

Publication number Publication date
EP2642125A4 (fr) 2016-11-16
CN101975160A (zh) 2011-02-16
CN101975160B (zh) 2014-12-03
US20130236334A1 (en) 2013-09-12
WO2012065320A1 (fr) 2012-05-24

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