CN211950842U - Axial oil outlet cycloid pump capable of realizing self-fastening - Google Patents

Axial oil outlet cycloid pump capable of realizing self-fastening Download PDF

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Publication number
CN211950842U
CN211950842U CN201921974031.1U CN201921974031U CN211950842U CN 211950842 U CN211950842 U CN 211950842U CN 201921974031 U CN201921974031 U CN 201921974031U CN 211950842 U CN211950842 U CN 211950842U
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China
Prior art keywords
transmission shaft
shell
pump
rear cover
oil
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CN201921974031.1U
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Chinese (zh)
Inventor
李传仓
高军
顾广溪
张亚明
曾伟
杨美琳
王段林
孙慧龙
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Xinxiang Aviation Industry Group Co Ltd
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Xinxiang Aviation Industry Group Co Ltd
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Abstract

The utility model belongs to the technical field of the design of a cycloid pump, and relates to an axial oil outlet cycloid pump capable of realizing self-fastening, which comprises a shell component (1), a rear cover (2), an eccentric shell (3), an outer rotor (4), a transmission shaft (5), a steel ball (6), an inner rotor (7), a cylindrical pin (8) and a front end cover (9); the transmission shaft (5) drives the inner rotor (7) and the outer rotor (4) to move in a meshed mode through the steel ball (6), and the shell assembly (1) and the rear cover (2) are in interference fit, so that the cycloid pump is axially compressed; axial oil discharge is realized by designing the flow passages of the front end cover (9) and the rear cover (2) and combining the hollow structure of the transmission shaft (1). The cycloid pump is high in structure and function integration level, small in size and light in weight, is convenient to integrate in an air turbine starter and a related aircraft lubricating oil system, and provides lubricating oil with certain pressure and flow for the air turbine starter and the related aircraft lubricating oil system.

Description

Axial oil outlet cycloid pump capable of realizing self-fastening
Technical Field
The invention belongs to the field of mechanical structure design, and relates to an axial oil outlet cycloid pump capable of realizing self-fastening.
Background
The traditional cycloid pump adopts a disc spring to axially compress an eccentric shell, an inner rotor, an outer rotor and an oil distribution disc so as to achieve the fixed state of an oil pump under various working conditions, ensure the end surface clearance between the eccentric shell and the inner rotor and the outer rotor and meet the corresponding functional and performance requirements; the oil outlet of a traditional cycloid pump is usually in an axially vertical structure with the pump, the disc spring, the mounting structure and the oil outlet structure of the traditional cycloid pump occupy large space, the pressure of the disc spring is unstable, the stress is relaxed, axial force exists in parts in the pump all the time, and the service life of a product is influenced. The transmission cycloid pump adopts copper alloy as a sliding bearing, and high-precision transmission under the condition of high rotating speed cannot be realized by adopting flat key matching between a transmission shaft and an inner rotor.
Disclosure of Invention
The utility model aims at: the utility model aims at providing a can realize the axial of self fastening and go out oily cycloid pump, structure and function integrated level height, small, light in weight of this kind of cycloid pump are convenient for integrate in air turbine starter and relevant aircraft lubricating oil system, provide the lubricating oil of certain pressure and flow for it.
For solving the technical problem, the technical proposal of the utility model is that: a can realize the cycloid pump of axial oil outlet of self-fastening, the said cycloid pump cancels disk spring and mounting structure, adopt and adopt the interference fit between back cover 2 and the body assembly 1, make the cycloid pump axially compact; axial oil discharge is realized by designing the flow passages of the front end cover 9 and the rear cover 2 and combining the hollow structure of the transmission shaft 1, and parts in the pump cannot deform due to disc-shaped elasticity; the oil outlet realizes axial oil outlet by designing an oil distribution disc groove of the front end cover 3 and combining a hollow structure of the transmission shaft 1; graphite bearings are selected in the shell component 1 to match high rotating speed, and the transmission shaft 5 drives the inner rotor 7 and the outer rotor 4 to move in a high-precision meshed mode through the steel balls 6.
The cycloid pump comprises a shell component 1, a rear cover 2, an eccentric shell 3, an outer rotor 4, a transmission shaft 5, a steel ball 6, an inner rotor 7, a cylindrical pin 8 and a front end cover 9; the transmission shaft 5 drives the inner rotor 7 and the outer rotor 4 to do inner meshing motion in the eccentric shell 3 through the steel ball 6, the transmission shaft 5 is installed at the bearing inner hole of the shell assembly 1, the front end cover 9 is installed at the lowest end of the oil well hole of the shell assembly 1, and the shell assembly 1 and the rear cover 2 are in interference fit, so that the front end cover 9, the eccentric shell 3, the outer rotor 4 and the inner rotor 7 of the cycloid pump are axially compressed; the front end cover 9 and the rear cover 2 are provided with oil suction cavities with the same structure, the center of the end surface of the rear cover 2 is provided with an oil outlet cavity communicated with the center hole of the transmission shaft 5, and lubricating oil enters the cycloid pump from an inlet of the shell assembly 1 and flows out through the center hole of the transmission shaft 5.
An eccentricity e is arranged between the outer rotor 4 and the inner rotor 7. The eccentricity e is 0.4-1. The transmission shaft 5 is provided with a boss, and the transmission shaft 5 is axially positioned through the boss. Graphite bearings are adopted in the housing assembly 1 to match the high rotational speed requirements of the gerotor pump. The shell component 1 is provided with an inlet matched with the front end cover 9 and the oil suction cavity of the rear cover 2.
The technical effects of the utility model are that: the utility model relates to an axial oil outlet cycloid pump capable of realizing self-fastening, which adopts the interference fit between a rear cover and a shell component so as to ensure axial compression, and transfers the fixation of the axial compression to the interference fit between the rear cover and the shell, and parts in the pump can not deform due to dish-shaped elasticity; axial oil discharge is realized by designing the flow passages of the front end cover and the rear cover and combining the hollow structure of the transmission shaft. The cycloid pump is high in structure and function integration level, small in size and light in weight, is convenient to integrate in an air turbine starter and a related aircraft lubricating oil system, and provides lubricating oil with certain pressure and flow for the air turbine starter and the related aircraft lubricating oil system.
Drawings
FIG. 1 is a perspective view;
FIG. 2 is a top view;
FIG. 3 is a sectional view taken along line A-A;
FIG. 4 is a functional schematic;
the device comprises a shell assembly 1, a rear cover 2, an eccentric shell 3, an outer rotor 4, a transmission shaft 5, a steel ball 6, an inner rotor 7, a cylindrical pin 8, and a front end cover 9.
Detailed Description
The invention will be further explained with reference to the following figures and examples:
the utility model relates to a can realize the principle of the axial cycloid pump that produces oil of self fastening: the shell assembly 1 and the rear cover 2 are in interference fit, so that the cycloid pump is axially compressed; axial oil discharge is realized by designing the flow passages of the front end cover 9 and the rear cover 2 and combining the hollow structure of the transmission shaft 1, and parts in the pump cannot deform due to disc-shaped elasticity; the oil outlet realizes axial oil outlet by designing an oil distribution disc groove of the front end cover 3 and combining a hollow structure of the transmission shaft 1; graphite bearings are selected in the shell component 1 to match high rotating speed, and the transmission shaft 5 drives the inner rotor 7 and the outer rotor 4 to move in a high-precision meshed mode through the steel balls 6.
As shown in fig. 4, the utility model discloses a can realize the axial oil outlet cycloid pump structure functional diagram of self-fastening, the theory of operation of this cycloid pump is: the lubricating oil enters the cycloid pump from the inlet of the shell component 1, the eccentricity e is arranged between the outer rotor 4 and the inner rotor 7, and the inner rotor 7 surrounds the center O1When rotating clockwise, the outer rotor 4 is driven to rotate around the center O2And the inclined shell 3 rotates in the same direction, the cavity B gradually increases to form vacuum, and oil is fed into the oil grooves of the front end cover 9 and the rear cover 2 communicated with the cavity B to form an oil absorption process. When the inner rotor 7 and the outer rotor 4 rotate to the position B, the cavity B is the largest. The cavity A is gradually reduced along with the rotation of the rotor and is communicated with an oil outlet of an oil groove of the rear cover 2 to generate an oil discharge process, the outer rotor 4 and the inner rotor 7 are continuously meshed for transmission, and lubricating oil is dischargedContinuously flows out from the central hole of the transmission shaft 5, when the A cavity is rotated to the position C in the figure 4- (a), the closed volume is minimum, and the oil pressing process is finished. Followed by an oil absorption process. Thus, the inner and outer rotors rotate around their respective centers O1 and O2 at different speeds and in the same direction, so that the volume of the cavity enclosed by the inner and outer rotors is changed continuously to form the oil sucking and discharging function.

Claims (6)

1. The utility model provides a can realize axial oil outlet cycloid pump of self-fastening which characterized in that: the cycloid pump comprises a shell assembly (1), a rear cover (2), an eccentric shell (3), an outer rotor (4), a transmission shaft (5), a steel ball (6), an inner rotor (7), a cylindrical pin (8) and a front end cover (9); the transmission shaft (5) drives the inner rotor (7) and the outer rotor (4) to perform high-precision meshing motion in the eccentric shell (3) through the steel ball (6), the transmission shaft (5) is installed at the bearing inner hole of the shell assembly (1), the front end cover (9) is installed at the lowest end of an oil well hole of the shell assembly (1), and the shell assembly (1) and the rear cover (2) are in interference fit, so that the front end cover (9), the eccentric shell (3), the outer rotor (4) and the inner rotor (7) of the cycloid pump are axially compressed; the front end cover (9) and the rear cover (2) are provided with oil suction cavities with the same structure, the center of the end surface of the rear cover (2) is provided with an oil outlet cavity communicated with the center hole of the transmission shaft (5), and lubricating oil enters the cycloid pump from an inlet of the shell assembly (1) and flows out through the center hole of the transmission shaft (5).
2. The axial oil outlet gerotor pump according to claim 1, characterized in that an eccentricity e is provided between the outer rotor (4) and the inner rotor (7).
3. The axial bleeding gerotor pump of claim 1, wherein the eccentricity e ranges from 0.4 to 1.
4. The axial oil discharge gerotor pump of claim 1, characterized in that the drive shaft (5) is provided with a boss, by means of which the drive shaft (5) is axially positioned.
5. The axial oil bleeding gerotor pump of claim 1, characterized in that graphite bearings are employed in the housing assembly (1) to match the high speed requirements of the gerotor pump.
6. The axial bleeding gerotor pump of claim 1, wherein: an inlet matched with the oil suction cavity of the front end cover (9) and the oil suction cavity of the rear cover (2) is arranged on the shell component (1).
CN201921974031.1U 2019-11-14 2019-11-14 Axial oil outlet cycloid pump capable of realizing self-fastening Active CN211950842U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921974031.1U CN211950842U (en) 2019-11-14 2019-11-14 Axial oil outlet cycloid pump capable of realizing self-fastening

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921974031.1U CN211950842U (en) 2019-11-14 2019-11-14 Axial oil outlet cycloid pump capable of realizing self-fastening

Publications (1)

Publication Number Publication Date
CN211950842U true CN211950842U (en) 2020-11-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114776581A (en) * 2022-06-07 2022-07-22 河南航天液压气动技术有限公司 Multi-stage output cycloid pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114776581A (en) * 2022-06-07 2022-07-22 河南航天液压气动技术有限公司 Multi-stage output cycloid pump
CN114776581B (en) * 2022-06-07 2024-05-24 河南航天液压气动技术有限公司 Multistage output cycloidal pump

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