US20130008159A1 - Liquid pump of screw expander - Google Patents

Liquid pump of screw expander Download PDF

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Publication number
US20130008159A1
US20130008159A1 US13/634,870 US201013634870A US2013008159A1 US 20130008159 A1 US20130008159 A1 US 20130008159A1 US 201013634870 A US201013634870 A US 201013634870A US 2013008159 A1 US2013008159 A1 US 2013008159A1
Authority
US
United States
Prior art keywords
liquid pump
expander
rotor
cavity
disposed
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.)
Abandoned
Application number
US13/634,870
Other languages
English (en)
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
Assigned to SHANGHAI POWER TECH. SCREW MACHINERY CO., LTD. reassignment SHANGHAI POWER TECH. SCREW MACHINERY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TANG, YAN
Publication of US20130008159A1 publication Critical patent/US20130008159A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/12—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type
    • F01C1/14—Rotary-piston machines or engines 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
    • F01C1/16—Rotary-piston machines or engines 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01C13/04—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby for driving pumps or compressors
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • F04C11/003—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle having complementary function
    • 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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/04—Units comprising pumps and their driving means the pump being fluid driven
    • 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
    • F04C2210/00—Fluid
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/206—Oil

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 liquid pump of a screw expander 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 liquid pump of a screw expander, which is capable of improving reliability of the liquid pump.
  • the present invention adopts the following technical solution.
  • a liquid pump of a screw expander comprising a semi-sealed or fully sealed shell, wherein an expander unit and a liquid pump unit are disposed in the shell; the expander unit comprises a screw rotor, and the liquid pump unit comprises a screw rotor; the rotor of the expander unit is fixedly connected to the rotor of the liquid pump unit, and the rotor of the liquid pump unit rotates under driving of the rotor of the expander unit.
  • the expander unit comprises an expander male rotor and an expander female rotor
  • the liquid pump unit comprises a liquid pump male rotor and a liquid pump female rotor
  • an end of the expander male rotor is fixedly connected to the liquid pump male rotor, and the liquid pump male rotor rotates under driving of the expander male rotor.
  • the shell comprises an expander cavity and a liquid pump cavity isolated from each other; all or a main body part of the expander male rotor, and the expander female rotor are disposed in the expander cavity; all or a main body part of the liquid pump male rotor, and the liquid pump female rotor are disposed in the liquid pump cavity; an expander suction inlet, an expander exhaust outlet, a liquid pump inlet and a liquid pump outlet are disposed on the shell.
  • the expander male rotor comprises a first rotor part and a first connection part which are integrally designed; the first rotor part is disposed in the expander cavity and coordinates with the expander female rotor; the first connection part extends into the liquid pump male rotor in the liquid pump cavity.
  • the liquid pump male rotor comprises a second rotor part and a second connection part which are integrally designed; the second rotor part is disposed in the liquid pump cavity and coordinates with the liquid pump female rotor; the second connection part extends into the expander male rotor in the expander cavity.
  • expander female rotor bearings are separately disposed at two ends of the expander female rotor, and liquid pump female rotor bearings are separately disposed at two ends of the liquid pump female rotor; a first male rotor bearing is disposed at an end of the expander male rotor away from the liquid pump male rotor; a second male rotor bearing is disposed at the first connection part and between the first rotor part of the expander and the second rotor part of the liquid pump.
  • the expander cavity and the liquid pump cavity are isolated from each other through an isolation mechanism, so that a hole is formed between the expander cavity and the liquid pump cavity; the first connection part passes through the hole and enters the liquid pump cavity.
  • the present invention has the following beneficial effects: in the ORC power generation system and the liquid pump of the screw expander thereof provided in the present invention, since a resistance torque of the liquid pump female rotor is very small, the liquid pump does not wear even when the liquid viscosity is very low, contributing to good reliability. Meanwhile, the liquid pump is driven by the screw expander, thereby further improving power generation efficiency of the ORC. In addition, the semi-sealed or fully sealed shell can effectively prevent leakage of the refrigerant.
  • FIG. 1 is a schematic view of composition of an ORC power generation system.
  • FIG. 2 is a schematic view of composition of an ORC power generation system using the present invention.
  • FIG. 3 is a sectional view of a liquid pump of a screw expander in a vertical direction consistent with the present invention.
  • FIG. 4 is a sectional view of a liquid pump of a screw expander in a horizontal direction consistent with the present invention.
  • 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 consists in the liquid pump 4 .
  • the liquid pump 4 is a liquid pump 4 of a screw expander.
  • the liquid pump 4 of a screw expander includes a semi-sealed or fully sealed shell.
  • the shell is formed of multiple components, and a seal ring 409 is disposed at each gap between components.
  • An expander suction inlet 410 , an expander exhaust outlet 411 , a liquid pump inlet 412 and a liquid pump outlet 413 are disposed on the shell.
  • the expander suction inlet 410 and the expander exhaust outlet 411 are respectively connected to an outlet of the evaporator 3 and an inlet of the condenser 5 .
  • the liquid pump inlet 412 and the liquid pump outlet 413 are respectively connected to an outlet of the condenser 5 and an inlet of the evaporator 3 .
  • An expander unit and a liquid pump unit are disposed in the shell.
  • the expander unit includes a screw rotor
  • the liquid pump unit includes a screw rotor.
  • the rotor of the expander unit is fixedly connected to the rotor of the liquid pump unit.
  • the rotor of the liquid pump unit rotates under driving of the rotor of the expander unit.
  • the expander unit includes an expander male rotor 401 and an expander female rotor 402 .
  • the liquid pump unit includes a liquid pump male rotor 403 and a liquid pump female rotor 404 .
  • An end of the expander male rotor 401 is fixedly connected to the liquid pump male rotor 403 , and the liquid pump male rotor 403 rotates under driving of the expander male rotor 401 .
  • the shell includes an expander cavity and a liquid pump cavity isolated from each other. All or a main body part of the expander male rotor 401 , and the expander female rotor 402 are disposed in the expander cavity. All or a main body part of the liquid pump male rotor 403 , and the liquid pump female rotor 404 are disposed in the liquid pump cavity. In this embodiment, the expander male rotor 401 extends into the liquid pump male rotor 403 in the liquid pump cavity.
  • the expander male rotor 401 includes a first rotor part and a first connection part which are integrally designed.
  • the first rotor part is disposed in the expander cavity and coordinates with the expander female rotor 402 .
  • the first connection part extends into the liquid pump male rotor 403 in the liquid pump cavity.
  • Expander female rotor bearings 4061 and 4062 are separately disposed at two ends of the expander female rotor 402 .
  • Liquid pump female rotor bearings 4071 and 4072 are separately disposed at two ends of the liquid pump female rotor 404 .
  • a first male rotor bearing 4051 is disposed at an end of the expander male rotor 401 away from the liquid pump male rotor 403 .
  • a second male rotor bearing 4052 is disposed at the first connection part and between the first rotor part of the expander and the second rotor part of the liquid pump.
  • the expander cavity and the liquid pump cavity are isolated from each other through an isolation mechanism, so that a hole is formed between the expander cavity and the liquid pump cavity.
  • the first connection part passes through the hole and enters the liquid pump cavity.
  • the seal ring 408 is used to seal and separate a rotor cavity (the liquid pump cavity) and a bearing cavity (the expander cavity), thereby ensuring effective lubrication of the bearing.
  • the liquid pump of a screw expander provided in the present invention, since a resistance torque of the liquid pump female rotor is very small, the liquid pump does not wear even when the liquid viscosity is very low, contributing to good reliability. Meanwhile, the liquid pump is driven by the screw expander, thereby further improving the power generation efficiency of the ORC. In addition, the semi-sealed or fully sealed shell can effectively prevent leakage of the refrigerant.
  • Embodiment 1 differs from Embodiment 1 in that, in this embodiment, the liquid pump male rotor extends into the expander male rotor.
  • the liquid pump male rotor includes a second rotor part and a second connection part which are integrally designed.
  • the second rotor part is disposed in the liquid pump cavity and coordinates with the liquid pump female rotor.
  • the second connection part extends into the expander male rotor in the expander cavity.
  • both the expander unit and the liquid pump unit include two screws.
  • the expander unit and the liquid pump unit may include other numbers of screws.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
US13/634,870 2010-11-08 2010-12-02 Liquid pump of screw expander Abandoned US20130008159A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201010535274.2 2010-11-08
CN201010535274A CN101975094B (zh) 2010-11-08 2010-11-08 螺杆膨胀机液体泵
PCT/CN2010/079371 WO2012062007A1 (zh) 2010-11-08 2010-12-02 螺杆膨胀机液体泵

Publications (1)

Publication Number Publication Date
US20130008159A1 true US20130008159A1 (en) 2013-01-10

Family

ID=43575000

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/634,870 Abandoned US20130008159A1 (en) 2010-11-08 2010-12-02 Liquid pump of screw expander

Country Status (4)

Country Link
US (1) US20130008159A1 (zh)
EP (1) EP2639530B1 (zh)
CN (1) CN101975094B (zh)
WO (1) WO2012062007A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140284931A1 (en) * 2013-03-25 2014-09-25 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Power generation apparatus and power generation system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103266924B (zh) * 2013-05-02 2015-04-29 上海维尔泰克螺杆机械有限公司 水蒸汽的高效发电系统及方法
CN107461221A (zh) * 2017-08-16 2017-12-12 无锡锡压压缩机有限公司 一种大功率柴油机余热回收用两级螺杆膨胀机结构
CN107859620B (zh) * 2017-10-31 2020-02-18 北京精密机电控制设备研究所 一种基于双出轴伺服电机的高压低噪音伺服电机泵
CN108252743B (zh) * 2018-01-22 2023-10-27 中国石油大学(华东) 一种用于地热能的全流循环发电装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2185803A (en) * 1937-03-12 1940-01-02 Gen Electric Elastic fluid power plant
GB1552385A (en) * 1975-05-13 1979-09-12 Maekawa Seisakusho Kk Device for compressing or expanding a gas or for pumping a liquid
US8674525B2 (en) * 2007-07-09 2014-03-18 Universiteit Gent Combined heat power system

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GB8605033D0 (en) * 1986-02-28 1986-04-09 Shell Int Research Fluid driven pumping apparatus
JPH06103035B2 (ja) * 1986-08-20 1994-12-14 株式会社日立製作所 スクリユ−式エキスパンダ−コンプレツサ−
CN2355134Y (zh) * 1999-01-11 1999-12-22 天津市科技投入公司 双螺杆泵
JP2002310081A (ja) * 2001-04-12 2002-10-23 Hitachi Ltd 燃料電池用スクリュー式流体機械
GB0210018D0 (en) * 2002-05-01 2002-06-12 Univ City Plural-screw machines
JP2005016742A (ja) * 2003-06-23 2005-01-20 Kobe Steel Ltd ヒートポンプ
JP2009257119A (ja) * 2008-04-14 2009-11-05 Kobe Steel Ltd 蒸気膨張機駆動空気圧縮装置
CN201857998U (zh) * 2010-11-08 2011-06-08 上海维尔泰克螺杆机械有限公司 螺杆膨胀机液体泵
JP6103035B2 (ja) * 2013-03-14 2017-03-29 日本電気株式会社 電力増幅器、故障検出方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2185803A (en) * 1937-03-12 1940-01-02 Gen Electric Elastic fluid power plant
GB1552385A (en) * 1975-05-13 1979-09-12 Maekawa Seisakusho Kk Device for compressing or expanding a gas or for pumping a liquid
US8674525B2 (en) * 2007-07-09 2014-03-18 Universiteit Gent Combined heat power system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140284931A1 (en) * 2013-03-25 2014-09-25 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Power generation apparatus and power generation system
US9618020B2 (en) * 2013-03-25 2017-04-11 Kobe Steel, Ltd. Power generation apparatus and power generation system

Also Published As

Publication number Publication date
EP2639530A4 (en) 2016-06-08
CN101975094B (zh) 2012-10-17
CN101975094A (zh) 2011-02-16
WO2012062007A1 (zh) 2012-05-18
EP2639530A1 (en) 2013-09-18
EP2639530B1 (en) 2018-04-18

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SHANGHAI POWER TECH. SCREW MACHINERY CO., LTD., CH

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TANG, YAN;REEL/FRAME:028959/0849

Effective date: 20120904

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION