CN107255073B - Motor built-in gear pump - Google Patents
Motor built-in gear pump Download PDFInfo
- Publication number
- CN107255073B CN107255073B CN201710488339.4A CN201710488339A CN107255073B CN 107255073 B CN107255073 B CN 107255073B CN 201710488339 A CN201710488339 A CN 201710488339A CN 107255073 B CN107255073 B CN 107255073B
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- Prior art keywords
- motor
- shaft
- gear
- pump
- cavity
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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
- 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
- F04C2/18—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 similar tooth forms
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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
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/008—Enclosed motor pump units
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a gear pump with a built-in motor, wherein in the gear pump consisting of two rotary gears, an outer rotor motor is arranged in an inner cavity of a driving gear, and the gear pump motor and a pump body are integrated into a whole, so that the structure of the gear pump is more compact, reasonable and perfect. The reduction in shape not only meets the requirements of use in certain narrow spaces, but also completely avoids the additional energy losses, machine element losses, pressure pulses and noise generated by the coupling of the power system with the input radial forces.
Description
Technical Field
The invention relates to an oil pump, in particular to a gear pump, and belongs to the field of mechanical tools.
Background
The gear pump is an oil pump which works by the intermeshing rotation of two gears, a pair of rotary gears is arranged in a pump body of the gear pump, one is active, the other is passive, and the whole working cavity in the pump is divided into two independent parts by the intermeshing of the two gears: a is a suction chamber and B is a discharge chamber. When the gear oil pump is in operation, the driving gear drives the driven gear to rotate, when the gears are meshed with each other and are separated from each other, a partial vacuum is formed on the suction side (A), and liquid is sucked. The sucked liquid fills each valley of the gear to the discharge side (B), and the liquid is squeezed out when the gear is engaged, forming high-pressure liquid and discharged out of the pump through the pump discharge port. In the existing gear pump, a motor is arranged on the outer side of a pump body, and then a motor shaft is coaxial with a driving gear shaft, so that power transmission is realized. Such an oil pump is bulky, requires high coaxiality between the motor and the drive gear, and is likely to cause damage to the pump due to shaft vibration.
Disclosure of Invention
The invention is realized by the following modes: a gear pump with built-in motor features that a pair of rotary gears are installed in pump body, one is active and one is passive, both gears are engaged with each other to divide the whole working cavity in pump into two independent parts, A is suction cavity and B is discharge cavity, the gear oil pump has a cavity with magnetic steel adhered to its internal circumference wall, the cavity and magnetic steel constitute external rotor of motor, the internal shaft of cavity is sleeved in internal stator of motor, the coil winding of motor is arranged on internal stator, the motor shaft is fixed to side wall of pump body, and the contact position between both ends of internal cavity of active rotary gear and motor shaft is sealed by oil seal.
The driving rotary gear is barrel-shaped and comprises a hollow gear and a side cover plate, wherein the center of the side plate is processed into a non-penetrating shaft hole, one end of the driving rotary gear is sealed by the side plate, one end of a motor shaft is fixed on one side of the pump body, and the other end of the motor shaft is inserted into the shaft hole of the side plate.
An electric control chamber is arranged on the outer side of the side wall of the pump body, a control circuit board of the motor is arranged in the electric control chamber, and a motor winding wire penetrates through a motor shaft and then is connected with the electric control plate.
Because the outer rotor motor is arranged in the inner cavity of the driving gear, the gear pump motor and the pump body are integrated, the structure of the gear pump is more compact, reasonable and perfect, the reduction of the shape not only meets the use requirements of some specific narrow spaces, but also completely avoids the additional energy loss, the machine part loss, the pressure pulse and the noise generated by the radial force input by the connection of a power system.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic view of the driving rotary gear of the present invention;
FIG. 4 is a schematic side view of a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of the electric control chamber portion of the present invention.
Detailed Description
Example 1: as shown in fig. 1, a pair of rotary gears, one is a driving rotary gear 2 and the other is a driven rotary gear 6, are arranged in a pump body 1 of the oil pump, and are meshed with each other to divide the whole working chamber in the pump into two independent parts, wherein a is a suction chamber 5 and B is a discharge chamber 7, and the driving rotary gear 2 drives the driven rotary gear 6 to rotate when the gear oil pump operates.
As shown in fig. 2 and 3, a side body of the pump body 1 is provided with a non-through shaft hole, the driving rotary gear 2 is tubular, the side surface is sealed by a side plate 10 to form a barrel shape, an outer side center shaft of the side plate 10 is provided with a protruding shaft 11 as a fulcrum, the protruding shaft is matched with the non-through shaft hole on the inner wall of the shell of the pump body 1 to form a rotary fulcrum, the inner side center shaft of the side plate 10 is provided with a non-through shaft hole 12, a magnetic steel 3 is adhered on the peripheral wall of the cavity, a motor shaft 8 is sleeved in the cavity, one end of the motor shaft 8 is fixed on the shaft hole of the pump body, the other end is arranged in the shaft hole 12 in the center of the side. Therefore, the isolation between the motor shaft 8 and the shell of the pump body 1 is ensured, and the possibility of oil leakage at one side of the driving rotary gear 2 is reduced.
The two ends of the driven rotary gear are provided with protruding shafts which are arranged in shaft holes on the side body of the pump body 1, and the outer end of the driven rotary gear is sealed to prevent oil leakage.
A stator coil winding 4 of the motor is arranged on a motor shaft 8, one end of an opening of the driving rotary gear 2 is sealed by an end cover, and the contact part of the end cover and a motor fixed shaft is sealed by an oil seal 9.
As shown in FIG. 4, an electric control chamber 14 is arranged on the outer side of the side wall of the pump body 1, a control circuit 13 board of the motor is arranged in the electric control chamber 14, a guide pipe 15 is arranged on the middle shaft of the motor shaft 8, and a conducting wire on a stator coil winding of the motor penetrates through the guide pipe 15 on the motor shaft and then is connected to the electric control chamber 13.
Example 2: as shown in fig. 5, a pair of rotary gears, one is a driving rotary gear 2 and the other is a driven rotary gear 6, are arranged in a pump body 1 of the oil pump, the two rotary gears are meshed with each other to divide the whole working chamber in the pump into two parts, namely a suction chamber 5 and a discharge chamber 7, and the driving rotary gear 2 drives the driven rotary gear 6 to rotate when the gear oil pump operates.
The side body of the pump body 1 is provided with a shaft hole corresponding to the driving rotary gear 2, and the shaft hole is used for fixedly mounting a motor shaft 8.
The inner cavity of the driving rotary gear 2 is processed into a barrel shape, the bottom wall is provided with a shaft hole, magnetic steel 3 is pasted on the peripheral wall of the inner cavity, and a rotating shaft of the motor penetrates through the shaft hole on the bottom wall of the driving rotary gear 2 and is fixed with the shaft hole on the side wall of the pump body 1.
The contact part of the shaft hole of the driving rotary gear 2 and the motor shaft 8 is sealed by an oil seal 9.
The two ends of the driven rotary gear 6 are provided with protruding shafts which are arranged in shaft holes which are not penetrated through the side body of the pump body 1.
The stator coil winding 4 of the motor is arranged on the motor shaft, and the power supply lead-out wire is led out of the pump body 1 through the motor shaft 8. One end of the opening of the driving rotary gear 2 is sealed by an end cover, and the contact part of the end cover and the motor fixing shaft is sealed by an oil seal 9.
When the pump body 1 works, the outer rotor motor arranged on the motor shaft 8 pushes the driving rotary gear 2 to rotate, and then drives the driven rotary gear 6 to rotate, so that the two rotary gears generate pumping action on liquid during rotation.
Claims (2)
1. A gear pump with built-in motor is characterized in that the inner cavity of the driving rotary gear is set as a cavity, magnetic steel is pasted on the inner circumferential wall of the cavity, the cavity and the magnetic steel form an outer rotor of the motor, an inner shaft of the cavity is sleeved in an inner stator of the motor, a coil winding of the motor is arranged on the inner stator, a motor shaft is fixed on the side wall of the pump body, and two ends of the inner cavity of the driving rotary gear are sealed by oil seals at the contact part with the motor shaft; the driving rotary gear is barrel-shaped and comprises a hollow gear and a side cover plate, wherein the center of the side plate is processed into a non-penetrating shaft hole, one end of the driving rotary gear is sealed by the side plate, one end of a motor shaft is fixed on one side of the pump body, and the other end of the motor shaft is inserted into the shaft hole of the side plate.
2. The motor internal gear pump according to claim 1, wherein an electric control chamber is provided outside the side wall of the pump body, a control circuit board of the motor is disposed in the electric control chamber, a guide tube is provided in the shaft of the motor shaft, and a lead wire of a stator coil winding of the motor is connected to the electric control chamber after passing through the guide tube on the motor shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710488339.4A CN107255073B (en) | 2017-06-23 | 2017-06-23 | Motor built-in gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710488339.4A CN107255073B (en) | 2017-06-23 | 2017-06-23 | Motor built-in gear pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107255073A CN107255073A (en) | 2017-10-17 |
| CN107255073B true CN107255073B (en) | 2020-05-08 |
Family
ID=60024256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710488339.4A Active CN107255073B (en) | 2017-06-23 | 2017-06-23 | Motor built-in gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107255073B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX2018008253A (en) * | 2018-07-03 | 2020-01-06 | Instituto Politécnico Nac | Positive hydraulic displacement pump with magnetic drive. |
| CN110345069A (en) * | 2019-08-19 | 2019-10-18 | 成都灏弘科技有限公司 | A kind of motor and the integrated novel lobe pump of the pump housing |
| CN115183046A (en) * | 2022-09-13 | 2022-10-14 | 浙江大学高端装备研究院 | Compact electro-hydraulic drive actuator |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003269345A (en) * | 2002-03-13 | 2003-09-25 | Aisin Seiki Co Ltd | Motor-driven oil pump |
| CN2564778Y (en) * | 2002-04-29 | 2003-08-06 | 烟台电机有限公司 | Unit construction gear oil pump motor |
| JP4237731B2 (en) * | 2005-05-31 | 2009-03-11 | 株式会社日立製作所 | Motor-integrated internal gear pump, method for manufacturing the same, and electronic device |
| CN1928364A (en) * | 2006-08-15 | 2007-03-14 | 兰州理工大学 | Hydraulic engine gear pump |
| DE102009045030A1 (en) * | 2009-09-25 | 2011-03-31 | Robert Bosch Gmbh | Gear pump for injection system, particularly for motor vehicle, has electric motor for supplying fluid, gear wheel with cogs and working room |
| CN202867199U (en) * | 2012-09-26 | 2013-04-10 | 天津特精华德液压技术开发有限公司 | External-meshing gear pump |
| CN206942993U (en) * | 2017-06-23 | 2018-01-30 | 浙江乾麟缝制设备有限公司 | A kind of electric motor built-in gear pump |
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2017
- 2017-06-23 CN CN201710488339.4A patent/CN107255073B/en active Active
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| Publication number | Publication date |
|---|---|
| CN107255073A (en) | 2017-10-17 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A motor built-in gear pump Effective date of registration: 20220906 Granted publication date: 20200508 Pledgee: Bank of China Limited Lishui Branch Pledgor: ZHEJIANG CHEERING SEWING MACHINE CO.,LTD. Registration number: Y2022980014550 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |