CN115234467A - 28V high-power electric pump with low noise and long endurance - Google Patents

28V high-power electric pump with low noise and long endurance Download PDF

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Publication number
CN115234467A
CN115234467A CN202210883750.2A CN202210883750A CN115234467A CN 115234467 A CN115234467 A CN 115234467A CN 202210883750 A CN202210883750 A CN 202210883750A CN 115234467 A CN115234467 A CN 115234467A
Authority
CN
China
Prior art keywords
motor
pump
plunger pump
oil
plunger
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.)
Pending
Application number
CN202210883750.2A
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Chinese (zh)
Inventor
田井武
刘雨
吴绍香
尹立鹏
吴茂民
程仁
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.)
AVIC Liyuan Hydraulic Co Ltd
Original Assignee
AVIC Liyuan Hydraulic 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 AVIC Liyuan Hydraulic Co Ltd filed Critical AVIC Liyuan Hydraulic Co Ltd
Priority to CN202210883750.2A priority Critical patent/CN115234467A/en
Publication of CN115234467A publication Critical patent/CN115234467A/en
Pending 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F04B23/106—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being an axial piston pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/22—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/14—Combinations of two or more pumps the pumps being of different types at least one pump being of the non-positive-displacement type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • 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
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

The invention discloses a 28V high-power electric pump with low noise and long endurance, which comprises a motor and a plunger pump, wherein a transmission shaft (5) on a motor rotor (4) of the motor is connected with an inner shaft (6) of the plunger pump, a motor oil inlet (20) and a motor oil outlet (21) are respectively arranged at the front end and the rear end of a motor shell (2) of the motor, and the motor oil outlet (21) is connected with a pump oil inlet of the plunger pump through a booster pump; the booster pump comprises a booster pump shell (17) on the outer side and an impeller (16) located in the booster pump shell (17), wherein an impeller shaft (14) is arranged on the impeller (16), the booster pump shell (17) is communicated with a plunger pump shell (8) of the plunger pump, and the impeller shaft (14) penetrates through a communication part of the booster pump shell (17) and the plunger pump shell (8) and is connected with an inner shaft (6). The invention has the advantages of high power density, low noise and low heat balance temperature, and is suitable for being used on novel fighters.

Description

28V high-power electric pump with low noise and long endurance
Technical Field
The invention belongs to the field of 28V electric pumps for aviation, and particularly relates to a low-noise long-endurance 28V high-power electric pump.
Background
The 28V electric pump for aviation mainly comprises a motor and a plunger pump, wherein a motor rotor of the motor is connected with a transmission shaft of the plunger pump, and the pump is generally used in an aircraft emergency energy system.
The traditional warplane is limited by the technical level of the airplane, and the 28V electric pump generally adopts an air cooling mode, namely a fan is arranged at the tail of a motor shaft to cool a motor stator and a shell. With the development of aircraft hydraulic technology, the defects of the air-cooled 28V electric pump are more and more obvious, and the defects are mainly represented in the following three aspects: (1) The power density is low, and since part of the power of the motor is used to drive the cooling fan, the efficiency of the electric pump is reduced, and the space required for the rotation of the fan is large, which results in an increase in the volume and weight of the electric pump, limiting the improvement of the power density of the motor part. (2) The noise is large, and the fluid noise and the mechanical noise generated by the operation of the electric pump are both large and increase along with the increase of the rotating speed, and particularly, the vibration and the noise generated by the rotation of the fan are directly transmitted to the external environment and are one of the largest noise sources of the electric pump, so the noise generated by the fan limits the reduction of the whole noise of the electric pump. (3) The thermal balance temperature is high, higher to flying height, the longer large-scale cargo airplane of operating duration and long-range bomber, because the air is comparatively thin under the low pressure operating mode, the cooling capacity of fan reduces, especially to 28V high-power electric pump, its operating current is up to more than 200A, the heat that leads to its during operation to produce is very high, the work can lead to the electric pump motor to be overheated and the spare part problem of burning out on the one hand during long voyage, on the other hand can lead to the plunger pump to be overheated and the problem of locking appears, the reliability and the life-span of aircraft hydraulic system have seriously been reduced, the flight safety of aircraft is influenced. Therefore, the existing 28V electric pump has the defects of low power density, high noise and high heat balance temperature, and is difficult to meet the technical requirements of a novel fighter plane in terms of power density, noise and heat balance.
Disclosure of Invention
The invention aims to provide a 28V high-power electric pump with low noise and long endurance. The invention has the advantages of high power density, low noise and low heat balance temperature, and is suitable for novel fighters.
The technical scheme of the invention is as follows: A28V high-power electric pump with low noise and long endurance comprises a motor and a plunger pump, wherein a transmission shaft on a motor rotor of the motor is connected with an inner shaft of the plunger pump, a motor oil inlet and a motor oil outlet are respectively arranged at the front end and the rear end of a motor shell of the motor, and the motor oil outlet is connected with a plunger pump oil inlet of the plunger pump through a booster pump.
In the 28V high-power electric pump of aforementioned long time of navigating of low noise, the booster pump includes the booster pump casing in the outside and is located the impeller of booster pump casing, is equipped with the impeller shaft on the impeller, and the booster pump casing is connected with branch oil cover screw, divides the oil cover to be equipped with the through-hole, and the impeller shaft passes through the through-hole of branch oil cover to through being connected interior axle with the cover tooth, interior axle passes through the transmission shaft and connects motor rotor.
In the aforementioned 28V high-power electric pump with low noise and long endurance, the oil return port of the plunger pump is disposed on the plunger pump housing near the front end bearing of the plunger pump.
In the 28V high-power electric pump with low noise and long endurance, the motor rotor is of a hollow structure.
Compared with the prior art, the invention adopts an oil cooling design, when the electric pump works, low-temperature oil firstly enters the motor to cool the motor, then is pressurized by the booster pump and enters the plunger pump, and high-pressure oil is pumped by the plunger pump to supply oil to the hydraulic system. In terms of power density, a fan is omitted, the motor efficiency is reduced, and the motor efficiency is improved, so that the power density of the electric pump is improved, and under the condition of the electric pump with the same weight, the total efficiency of the electric pump is about 72%, while the total efficiency of the existing electric pump can only reach 65%. On the aspect of noise suppression, on one hand, oil is filled in the motor to absorb noise generated by rotation and vibration of the motor, and on the other hand, the booster pump boosts oil at the inlet of the plunger pump to enable the oil at the inlet of the plunger pump to be sufficiently filled, so that vibration and noise generated by air suction at the inlet of the plunger pump are avoided, and under the same working condition of 9000rpm, the noise of the electric pump is about 95dB, while the noise of the existing electric pump reaches 110dB. In thermal balance, when the electric pump is in a high-pressure large-flow working condition, the power of the motor is higher, low-temperature oil entering from an oil inlet of the motor cools parts such as a motor stator, a motor rotor and a motor bearing, so that the temperature of the oil entering the plunger pump is higher, but the plunger pump supplies oil to a hydraulic system, and the oil at an outlet takes away most of heat, so that the thermal balance temperature of the electric pump is lower; when the electric pump is in a high-pressure small-flow state, the plunger pump can only radiate heat through return oil, but the power of the motor is low, the temperature of oil entering the plunger pump is low, the cooling effect of the oil on the plunger pump is good, and therefore the heat balance temperature of the electric pump is low under any working condition, the heat balance temperature of the electric pump is about 76 ℃, and the heat balance temperature of the existing electric pump is about 98 ℃. Therefore, the invention has the advantages of high power density, low noise and low heat balance temperature, and is suitable for being used on novel fighters.
Drawings
FIG. 1 is a schematic diagram of the present invention.
The labels in the figures are: 1-inlet pipe joint; 2-motor housing; 3-a motor stator; 4-a motor rotor; 5-a transmission shaft; 6-inner shaft; 7-oil return pipe joint; 8-plunger pump housing; 9-a front end bearing; 10-a swash plate; 11-shoe-plunger assembly; 12-a plunger pump rotor; 13-set of teeth; 14-an impeller shaft; 15-oil separating cover; 16-an impeller; 17-a booster pump housing; 18-a transition joint; 19-motor bearing, 20-motor oil inlet, 21-motor oil outlet, 22-booster pump oil inlet, 23-plunger pump oil outlet, 24-booster pump oil outlet and 25-plunger pump oil inlet.
Detailed Description
The invention is further described with reference to the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. A low noise, long endurance, 28V, high power electric pump, as shown in FIG. 1, includes a motor and a plunger pump.
Similar to the structure of the motor in the existing electric pump, the motor structure in the embodiment (shown in the right part of fig. 1) also includes a motor housing 2, a motor stator 3 fixed inside the motor housing 2, and a motor rotor 4 located inside the motor stator 3, wherein the motor rotor 4 is provided with a transmission shaft 5, the transmission shaft 5 is provided with two motor bearings 19, and the two motor bearings 19 are respectively located at the front end and the rear end of the motor housing 2.
The plunger pump structure in the embodiment is similar to the structure of a plunger pump on the existing electric pump, and also comprises a plunger pump shell 8, wherein a plunger pump oil inlet 25, a plunger pump oil outlet 23 and a plunger pump oil return port are arranged on the plunger pump shell 8, an inner shaft 6 is arranged in the plunger pump shell 8, the inner shaft 6 is in splined connection with a transmission shaft 5, a front end bearing 9 is arranged between the inner shaft 6 and the plunger pump shell 8, the front end bearing is close to one side of a motor, and a swash plate 10, a slipper-plunger assembly 11, a plunger pump rotor 12 and an oil distribution cover 15 are arranged on the inner shaft 6.
Current electric pump is under operating condition, and motor drive electric pump, during fluid got into the plunger pump through plunger pump oil inlet 25, exported from plunger pump oil outlet 23, when inside oil pressure was too high, the fluid that leaks to 8 inner chambers of casing from the friction pair flowed to outside oil tank through the plunger pump oil return opening, and basic theory of operation is: the transmission shaft 5 of the motor drives the inner shaft 6 of the plunger pump to rotate, and due to the fact that the inclined disc 10 has an inclined angle, on one hand, the rotor 12 and the slipper-plunger assembly 11 rotate around the inner shaft 6, on the other hand, the slipper-plunger assembly 11 does linear reciprocating motion in a plunger hole of the rotor 12, and therefore the oil sucking and discharging process of the plunger pump is achieved, high-pressure oil is discharged through the oil outlet 23 of the plunger pump, and oil is supplied to a hydraulic system.
The main differences are: in the present embodiment, a motor oil inlet 20 and a motor oil outlet 21 are respectively provided at the front and rear ends of a motor housing 2 of the motor, the motor oil outlet 21 is connected to a plunger pump oil inlet 25 of a plunger pump through a booster pump (left side portion of fig. 1), and an inlet pipe joint 1 is provided at the motor oil inlet 20.
The booster pump comprises a booster pump shell 17 and an impeller 16, wherein the booster pump shell 17 is arranged on the outer side of the booster pump shell, the impeller 16 is provided with an impeller shaft 14, the booster pump shell 17 is in screw connection with an oil distribution cover 15, the oil distribution cover 15 is provided with a through hole, the impeller shaft 14 penetrates through the through hole of the oil distribution cover 15 and is connected with an inner shaft 6 through a sleeve tooth 13, two ends of the sleeve tooth 13 are respectively in splined connection with the inner shaft 6 and the impeller shaft 14, and the inner shaft 6 is connected with a motor rotor 4 through a transmission shaft 5. And a booster pump oil inlet 22 and a booster pump oil outlet 24 are arranged on the booster pump shell 17, the booster pump oil inlet 22 is connected with a motor oil outlet 21 through three transition joints 18, and the transition joints 18 are used for oil circuit connection and leakage prevention between corresponding shells. And an oil outlet 24 of the booster pump is connected with an oil inlet 25 of the plunger pump through a pipeline.
The oil return opening of the plunger pump is arranged on a plunger pump shell 8 close to a front end bearing 9 of the plunger pump, and an oil return pipe joint 7 is arranged on the oil return opening.
The rotor 4 is of a hollow structure, that is, oil holes through which oil can pass are formed in the rotor 4, so that the oil can cool the motor bearing 19 and the motor rotor 4.
The working principle of the invention is as follows: in the working state, the motor drives the plunger pump, oil enters the motor through the inlet pipe joint 1, cools the motor bearing 19 and the motor rotor 4, then enters the booster pump through the transition joint 18 and the booster pump oil inlet 22, is pressurized under the action of the rotating impeller 16, enters the plunger pump from the booster pump oil outlet 24 and the plunger pump oil inlet 25, and outputs high-pressure oil to the hydraulic system after being pressurized by the plunger pump. The impeller 16 is driven to rotate by the impeller shaft 14, and the impeller shaft 14 is driven to rotate by the inner shaft 6 through the sleeve teeth 13.

Claims (4)

1. The utility model provides a high-power electric pump of 28V of low noise long endurance, includes motor and plunger pump, and the interior axle (6) of plunger pump are connected to transmission shaft (5) on the motor rotor (4) of motor, its characterized in that: the front end and the rear end of a motor shell (2) of the motor are respectively provided with a motor oil inlet (20) and a motor oil outlet (21), and the motor oil outlet (21) is connected with a plunger pump oil inlet (25) of a plunger pump through a booster pump.
2. The low noise, long endurance, 28V high power electric pump of claim 1, wherein: the booster pump includes booster pump casing (17) in the outside and impeller (16) that are arranged in booster pump casing (17), is equipped with impeller shaft (14) on impeller (16), and booster pump casing (17) and branch oil cover (15) screw connection are equipped with the through-hole on the branch oil cover (15), and impeller shaft (14) pass the through-hole of branch oil cover (15) to through being connected interior axle (6) with set tooth (13), interior axle (6) are through transmission shaft (5) connection electric motor rotor (4).
3. The low noise, long endurance, 28V high power electric pump of claim 1, wherein: the oil return port of the plunger pump is arranged on a plunger pump shell (8) close to a front end bearing (9) of the plunger pump.
4. The low noise, long endurance, 28V high power electric pump of claim 1, wherein: the motor rotor (4) is of a hollow structure.
CN202210883750.2A 2022-07-26 2022-07-26 28V high-power electric pump with low noise and long endurance Pending CN115234467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210883750.2A CN115234467A (en) 2022-07-26 2022-07-26 28V high-power electric pump with low noise and long endurance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210883750.2A CN115234467A (en) 2022-07-26 2022-07-26 28V high-power electric pump with low noise and long endurance

Publications (1)

Publication Number Publication Date
CN115234467A true CN115234467A (en) 2022-10-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210883750.2A Pending CN115234467A (en) 2022-07-26 2022-07-26 28V high-power electric pump with low noise and long endurance

Country Status (1)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB435612A (en) * 1935-02-06 1935-09-24 Thomas Winter Nichols Improved cooling systems for rotary compressors, exhausters and pumps
GB999651A (en) * 1961-09-20 1965-07-28 Gen Electric A hermetically sealed rotary refrigerant compressor
CN202628418U (en) * 2011-12-20 2012-12-26 中国航空工业集团公司金城南京机电液压工程研究中心 Axial plunger pump with centrifugal supercharging turbine
CN104235073A (en) * 2014-10-17 2014-12-24 邢宇 Method for introducing circulating fluid into rotating hollow rotor cavity of centrifugal pump
CN106032794A (en) * 2016-07-29 2016-10-19 浙江大学 Integrated high-rotation-speed swash-plate-rotating motor pump
CN107276257A (en) * 2017-07-31 2017-10-20 广东威灵电机制造有限公司 Rotor and preparation method thereof, motor and electronic water pump
CN216342851U (en) * 2021-11-03 2022-04-19 利欧集团浙江泵业有限公司 Water-cooled amphibious pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB435612A (en) * 1935-02-06 1935-09-24 Thomas Winter Nichols Improved cooling systems for rotary compressors, exhausters and pumps
GB999651A (en) * 1961-09-20 1965-07-28 Gen Electric A hermetically sealed rotary refrigerant compressor
CN202628418U (en) * 2011-12-20 2012-12-26 中国航空工业集团公司金城南京机电液压工程研究中心 Axial plunger pump with centrifugal supercharging turbine
CN104235073A (en) * 2014-10-17 2014-12-24 邢宇 Method for introducing circulating fluid into rotating hollow rotor cavity of centrifugal pump
CN106032794A (en) * 2016-07-29 2016-10-19 浙江大学 Integrated high-rotation-speed swash-plate-rotating motor pump
CN107276257A (en) * 2017-07-31 2017-10-20 广东威灵电机制造有限公司 Rotor and preparation method thereof, motor and electronic water pump
CN216342851U (en) * 2021-11-03 2022-04-19 利欧集团浙江泵业有限公司 Water-cooled amphibious pump

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