US20130236334A1 - Double-screw liquid pump - Google Patents
Double-screw liquid pump Download PDFInfo
- Publication number
- US20130236334A1 US20130236334A1 US13/885,158 US201013885158A US2013236334A1 US 20130236334 A1 US20130236334 A1 US 20130236334A1 US 201013885158 A US201013885158 A US 201013885158A US 2013236334 A1 US2013236334 A1 US 2013236334A1
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- United States
- Prior art keywords
- rotor
- cavity
- double
- motor
- screw
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- 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
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Classifications
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- 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
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- 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
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- 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
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- 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. 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 double-screw liquid pump in a vertical direction consistent with the present invention.
- FIG. 4 is a sectional view of a double-screw liquid pump in a horizontal direction consistent with the present invention.
- FIG. 5 is a sectional view of the male and female motors of a double-screw liquid pump 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 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.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
A double-screw liquid pump is provided, which is applicable to an Organic Rankin Cycle (ORC). The double-screw liquid pump includes a semi-sealed or fully sealed shell, and the shell includes 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 a liquid refrigerant; a liquid inlet and a liquid outlet are disposed on the second cavity. 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. In addition, the semi-sealed or fully sealed shell can effectively prevent leakage of the refrigerant.
Description
- 1. Field of Invention
- 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.
- 2. Description of Related Arts
- Referring to
FIG. 1 ,FIG. 1 is a typical ORC, which includes anexpander 1′, agenerator 2′, anevaporator 3′, aliquid pump 4′ and acondenser 5′. - A low-temperature and low-pressure liquid refrigerant is pressurized in the
liquid pump 4′, and then enters theevaporator 3′ to be evaporated through heating until the refrigerant becomes an overheated gas (high temperature and high pressure). The overheated gas enters theexpander 1′ to work through expansion, so as to drive thegenerator 2′ to generate power. After working, the low-temperature and low-pressure gas enters thecondenser 5′ and is condensed to liquid, and then flows back into theliquid pump 4′, thus completing a cycle. - Most of the existing liquid pumps are open-type gear pumps or centrifugal pumps. 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.
- In order to solve the above technical problem, the present invention adopts the following technical solution.
- A double-screw liquid pump is provided, 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.
- As a preferential solution of the present invention, 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.
- As a preferential solution of the present invention, 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.
- As a preferential solution of the present invention, 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.
- As a preferential solution of the present invention, 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.
- As a preferential solution of the present invention, the connection part and an end of the second male rotor bearing close to the rotor of the motor are sealed through a shaft seal.
- As a preferential solution of the present invention, 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. 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 double-screw liquid pump in a vertical direction consistent with the present invention. -
FIG. 4 is a sectional view of a double-screw liquid pump in a horizontal direction consistent with the present invention. -
FIG. 5 is a sectional view of the male and female motors of a double-screw liquid pump consistent with the present invention. -
- 1′ Expander
- 2′ Generator
- 3′ Evaporator
- 4′ Liquid
pump 5′ Condenser - 1 Expander
- 2 Generator
- 3 Evaporator
- 4 Liquid pump
- 5 Condenser
- 401 Motor
- 402 Male rotor
- 403 Female rotor
- 4041 First male rotor bearing
- 4042 Second male rotor bearing
- 405 Female rotor bearing
- 406 Seal ring
- 407 Liquid inlet
- 408 Liquid outlet
- 409 Refrigerant injection inlet
- 410 Refrigerant outlet
- 411 Shaft seal
- Exemplary embodiments of the present invention are described in detail with reference to the accompanying drawings below.
- Referring to
FIG. 2 ,FIG. 2 shows an ORC power generation system using the present invention. The ORC power generation system includes acondenser 5, aliquid pump 4, anevaporator 3, anexpander 1, and agenerator 2. The main improvement of the present invention is theliquid pump 4. In this embodiment, theliquid pump 4 is a double-screwliquid pump 4. - Referring to
FIG. 3 andFIG. 4 , the double-screwliquid 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. Aliquid 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 afemale rotor 403. A first end of themale rotor 402 is fixedly connected to the rotor of the motor 401. Themale 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 thefemale 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 themale rotor 402 away from the motor 401. Female rotor bearings 405 are separately disposed at two ends of thefemale rotor 403. A secondmale 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 secondmale rotor bearing 4042 close to the rotor of the motor are sealed through a shaft seal 411. - In conclusion, in the fully sealed or semi-sealed double-screw liquid pump applied to the ORC power generation system 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. In addition, the semi-sealed or fully sealed shell can effectively prevent leakage of the refrigerant.
- Herein, the description and application of the present invention are illustrative, and the scope of the present invention is not intended to be limited to the above embodiments. Variations and changes to the embodiments disclosed herein are possible. Replacement made to the embodiments and equivalent parts are well-known to persons skilled in the art. It should be known to persons skilled in the art that, the present invention can be implemented in other forms, structures, arrangements, ratios and through other components, materials, and parts without departing from the script or essential features of the present invention. Other variations and changes may be made to the embodiments disclosed herein without departing from the scope and script of the present invention.
Claims (7)
1. 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 a liquid refrigerant; and
a liquid inlet and a liquid outlet are disposed on the second cavity.
2. The double-screw liquid pump as in claim 1 , wherein
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.
3. The double-screw liquid pump as in claim 2 , wherein
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.
4. The double-screw liquid pump as in claim 3 , wherein
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.
5. The double-screw liquid pump as in claim 4 , wherein
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.
6. The double-screw liquid pump as in claim 5 , wherein
the connection part and an end of the second male rotor bearing close to the rotor of the motor are sealed through a shaft seal.
7. The double-screw liquid pump as in claim 1 , wherein
the motor is an inverter motor or a motor with a fixed rotating speed.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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CN201010548653.5 | 2010-11-16 | ||
CN201010548653.5A CN101975160B (en) | 2010-11-16 | 2010-11-16 | Double-screw liquid pump |
PCT/CN2010/079291 WO2012065320A1 (en) | 2010-11-16 | 2010-11-30 | Twin-screw liquid pump |
Publications (1)
Publication Number | Publication Date |
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US20130236334A1 true US20130236334A1 (en) | 2013-09-12 |
Family
ID=43575066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/885,158 Abandoned US20130236334A1 (en) | 2010-11-16 | 2010-11-30 | Double-screw liquid pump |
Country Status (4)
Country | Link |
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US (1) | US20130236334A1 (en) |
EP (1) | EP2642125A4 (en) |
CN (1) | CN101975160B (en) |
WO (1) | WO2012065320A1 (en) |
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CN110914549A (en) * | 2017-06-27 | 2020-03-24 | 纬湃科技有限责任公司 | Screw spindle pump, fuel pump assembly and fuel pump unit |
WO2020164776A1 (en) * | 2019-02-12 | 2020-08-20 | Nidec Gpm Gmbh | Electrical screw spindle coolant pump |
CN113039346A (en) * | 2018-11-30 | 2021-06-25 | 尼得科盖普美有限责任公司 | Screw pump for cooling battery pack |
CN114585805A (en) * | 2019-10-31 | 2022-06-03 | 伊利诺斯工具制品有限公司 | Motor vehicle cooling circuit |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5751885B2 (en) * | 2011-03-29 | 2015-07-22 | 株式会社神戸製鋼所 | Power generation system and power generation apparatus |
DE102017218287B4 (en) | 2017-10-12 | 2021-12-23 | Vitesco Technologies GmbH | Fuel pump and fuel delivery unit |
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CN110914549A (en) * | 2017-06-27 | 2020-03-24 | 纬湃科技有限责任公司 | Screw spindle pump, fuel pump assembly and fuel pump unit |
US11339781B2 (en) | 2017-06-27 | 2022-05-24 | Vitesco Technologies GmbH | Screw spindle pump, fuel pump assembly, and fuel pump unit |
CN113039346A (en) * | 2018-11-30 | 2021-06-25 | 尼得科盖普美有限责任公司 | Screw pump for cooling battery pack |
WO2020164776A1 (en) * | 2019-02-12 | 2020-08-20 | Nidec Gpm Gmbh | Electrical screw spindle coolant pump |
CN114585805A (en) * | 2019-10-31 | 2022-06-03 | 伊利诺斯工具制品有限公司 | Motor vehicle cooling circuit |
US20220381178A1 (en) * | 2019-10-31 | 2022-12-01 | Illinois Tool Works Inc. | Motor vehicle cooling circuit |
Also Published As
Publication number | Publication date |
---|---|
CN101975160B (en) | 2014-12-03 |
CN101975160A (en) | 2011-02-16 |
WO2012065320A1 (en) | 2012-05-24 |
EP2642125A4 (en) | 2016-11-16 |
EP2642125A1 (en) | 2013-09-25 |
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Legal Events
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AS | Assignment |
Owner name: SHANGHAI POWER TECH. SCREW MACHINERY CO., LTD., CH Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TANG, YAN;REEL/FRAME:030406/0323 Effective date: 20120510 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |