CN219606716U - Cycloidal pump for lubrication system - Google Patents

Cycloidal pump for lubrication system Download PDF

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Publication number
CN219606716U
CN219606716U CN202320296224.6U CN202320296224U CN219606716U CN 219606716 U CN219606716 U CN 219606716U CN 202320296224 U CN202320296224 U CN 202320296224U CN 219606716 U CN219606716 U CN 219606716U
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CN
China
Prior art keywords
pump
pump body
end cover
oil
eccentric ring
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Active
Application number
CN202320296224.6U
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Chinese (zh)
Inventor
凌利江
吴鑫炎
黄炳锋
孙彦华
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Hangzhou Xiaoshan Oriental Hydraulic Co ltd
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Hangzhou Xiaoshan Oriental Hydraulic Co ltd
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Priority to CN202320296224.6U priority Critical patent/CN219606716U/en
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Publication of CN219606716U publication Critical patent/CN219606716U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Abstract

The utility model discloses a cycloidal pump for a lubrication system, which comprises a pump body and an end cover, wherein the end cover is positioned on one side of the pump body, the pump body is provided with an oil inlet channel and an oil outlet channel, and the pump body further comprises: the pump shaft is arranged in the pump body in a penetrating way, and one end of the pump shaft is propped against the end cover; the cycloid rotor pair is sleeved on the pump shaft; the interface is arranged on one side of the pump body, which is far away from the end cover, and is used for connecting an external power gear box; the oil drain port is arranged on the pump body and is communicated with the outside of the interface and the oil outlet channel. The end cover is positioned on one side of the pump body, and only one sealing plane is needed to be provided, so that the requirement of center positioning is avoided, and the product is more reliable; the oil drain port is communicated with the outside of the interface and the oil outlet channel, so that pumped oil can be drained out for part in the cycloidal pump to directly lubricate a shaft or a bearing for driving the cycloidal pump.

Description

Cycloidal pump for lubrication system
Technical Field
The utility model relates to the technical field of cycloidal pumps, in particular to a bidirectional inner meshing cycloidal pump with a driving shaft self-oil supplementing function.
Background
The cycloid pump is widely applied to an electric loader of a lubrication system due to the advantages of compact structure, small volume, few parts, high rotating speed, stable motion, low noise, higher volumetric efficiency and the like, so that how to realize stable operation in a small space and improve the lubrication effect is very important to improve the operation efficiency of the cycloid pump.
For example, in the "bi-directional cycloidal pump based on special eccentric ring" of publication No. CN216714692U, including Kong Kahuang, kong Kahuang, the outer wall of oil blanket is provided with the oil blanket, the outer wall of oil blanket is provided with the pump body, the inner wall of the pump body is provided with first oilless bush, one side that the pump body was kept away from to first oilless bush is provided with the integral key, the inner wall of integral key is provided with the round key, the outer wall of integral key is provided with second oilless bush, the inner wall of the pump body is provided with eccentric ring, the inner wall of eccentric ring is provided with the rotor, the inner wall of rotor is provided with the second cylindric lock, the inner wall of eccentric ring is provided with first cylindric lock, through designing the business turn over hydraulic fluid port in the front of big lid for the pump body is compacter, occupation space is littleer, however, its shortcoming is, be provided with hole jump ring, oilless bush isotructure on the pump body, it is more complicated and difficult to lead to pump body seal and assemble, and can't carry out effective lubrication to the connecting axle in the power supply.
Disclosure of Invention
In order to solve the problems that the existing cycloidal pump is difficult to seal, complex to assemble and incapable of lubricating a power shaft, the utility model provides the cycloidal pump for the lubrication system, which has a simple structure and good sealing property and can directly lubricate a shaft or a bearing driven by the pump.
The utility model is realized by the following technical scheme: the utility model provides a cycloid pump for lubricating system, includes pump body and end cover, the end cover is located pump body one side, the pump body is provided with oil feed passageway and play oil channel, the pump body still includes:
the pump shaft is arranged in the pump body in a penetrating way, and one end of the pump shaft is propped against the end cover;
the cycloid rotor pair is sleeved on the pump shaft;
the interface is arranged on one side of the pump body, which is far away from the end cover, and is used for connecting an external power gear box;
the oil drain port is arranged on the pump body and is communicated with the outside of the interface and the oil outlet channel.
The end cover is positioned on one side of the pump body, only one sealing plane is needed to be provided, and the requirement of central positioning is avoided, so that the product is more reliable, the structure is simple, the manufacturing difficulty is low, and the precision reduction caused by assembly and assembly of parts is reduced; the oil drain port is communicated with the outside of the interface and the oil outlet channel, so that pumped oil can be discharged out of the cycloid pump to directly lubricate a shaft or a bearing for driving the cycloid pump, an additional design oil way is not needed, and the structural complexity of the box body is reduced.
Preferably, the pump shaft is sleeved with a double composite bearing, one of the double composite bearings is positioned on one side of the pump body close to the end cover, and the other double composite bearing is positioned on one side of the pump body far away from the end cover. The two composite bearings can improve the service life of the shaft under the severe lubrication working condition of oil-free or oil-less oil, and reduce the precision reduction caused by assembly and assembly of parts.
Preferably, the oil inlet channel and the oil outlet channel are L-shaped. The oil inlet channel and the oil outlet channel can face the oil inlet and the oil outlet to one side back to the end cover after bypassing the interface, so that the pump body is more compact and occupies smaller space.
Preferably, the cycloid rotor pair comprises an inner rotor sleeved on the pump shaft and an outer rotor meshed with the inner rotor, an eccentric ring is sleeved outside the outer rotor, a bulge facing the eccentric ring is arranged in the pump body, a sliding groove for accommodating the bulge is formed in the circumference of the eccentric ring, and the central angle corresponding to the sliding groove is 180 degrees.
When the power source of the cycloid pump needs to change the rotation direction, the outer rotor can drive the eccentric ring to rotate 180 degrees until the eccentric ring is limited by the protrusions, so that the meshing position of the inner rotor and the outer rotor is still enlarged in volume at the oil inlet channel and reduced in volume at the oil outlet channel, and the directions of oil inlet and oil outlet are not changed.
Preferably, a circle of lubrication grooves are formed in the inner surface, in contact with the outer rotor, of the eccentric ring, and an eccentric lubrication channel which is communicated with the lubrication grooves and the oil inlet channel is formed in the eccentric ring and the pump body.
When the cycloid pump operates, oil can enter the lubrication groove through the eccentric lubrication channel, so that lubrication is carried out between the outer rotor and the eccentric ring; when the direction of the power source of the cycloid pump is changed, before oil enters the oil inlet channel, partial oil in the lubrication groove can be pumped out of the oil inlet channel by negative pressure near the oil inlet channel, so that the friction force between the outer rotor and the eccentric ring is improved, and the eccentric ring is driven by the outer rotor to rotate 180 degrees.
Preferably, the cycloid rotor pair comprises an inner rotor sleeved on the pump shaft and an outer rotor meshed with the inner rotor, an eccentric ring is sleeved outside the outer rotor, a positioning groove is formed in one side, facing the pump body, of the end cover, a positioning column is arranged in the positioning groove, a sliding groove for accommodating the positioning column is formed in the circumference of the eccentric ring, and the central angle corresponding to the sliding groove is 180 degrees.
The locating column can be used as a locating foundation to limit the installation of the end cover and the pump body while limiting the eccentric ring, so that the installation accuracy is improved.
Preferably, a sealing groove is formed in the end cover, and a sealing ring is arranged in the sealing groove to prevent oil from leaking from between the end cover and the pump body.
Preferably, a flat wire head is arranged at one end of the pump shaft connected with the power source, and the flat wire is large in design transmission torque, good in manufacturability and convenient to assemble.
Compared with the prior art, the utility model has the beneficial effects that:
the end cover is positioned on one side of the pump body, only one sealing plane is needed to be provided, and the requirement of central positioning is avoided, so that the product is more reliable, the structure is simple, the manufacturing difficulty is low, and the precision reduction caused by assembly and assembly of parts is reduced; the oil drain port is communicated with the outside of the interface and the oil outlet channel, so that pumped oil can be discharged out of the cycloid pump to directly lubricate a shaft or a bearing for driving the cycloid pump, an additional design oil way is not needed, and the structural complexity of the box body is reduced. .
Drawings
FIG. 1 is an exploded perspective view of a first embodiment of the present utility model;
FIG. 2 is a schematic diagram of the front working principle of the embodiment of the present utility model when rotating clockwise;
FIG. 3 is a schematic diagram of the front working principle of the embodiment of the present utility model when rotated counterclockwise;
FIG. 4 is a schematic cross-sectional view at A-A of FIG. 2;
FIG. 5 is an enlarged schematic view of FIG. 4 at B;
FIG. 6 is a schematic cross-sectional view of a second embodiment of the present utility model at a point corresponding to A-A in FIG. 2;
fig. 7 is an enlarged schematic view at C in fig. 6.
In the figure: pump body 1, pump shaft 11, flat wire head 111, inner rotor 12, outer rotor 13, interface 14, oil drain port 15, double composite bearing 16, eccentric ring 17, sliding groove 171, lubrication groove 172, eccentric lubrication channel 173, bulge 18, end cover 2, positioning groove 21, positioning column 22, seal groove 23, oil inlet channel 3, and oil outlet channel 4.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present utility model easy to understand, the following further describes how the present utility model is implemented with reference to the accompanying drawings and the detailed description.
1-5, a cycloid pump for a lubrication system includes a pump body 1 and an end cover 2, the end cover 2 is located at one side of the pump body 1, the pump body 1 is provided with an oil inlet channel 3 and an oil outlet channel 4, and the pump body 1 further includes:
the pump shaft 11 is arranged in the pump body 1 in a penetrating way, and one end of the pump shaft is propped against the end cover 2;
the cycloid rotor pair is sleeved on the pump shaft 11 and comprises an inner rotor 12 sleeved on the pump shaft 11 and an outer rotor 13 meshed with the inner rotor 12;
the interface 14 is arranged on one side of the pump body 1 far away from the end cover 2 and is used for connecting an external power gear box;
the oil drain port 15 is arranged on the pump body 1 and is communicated with the outside of the interface 14 and the oil outlet channel 4;
the double composite bearings 16 are sleeved on the pump shaft 11, one of the double composite bearings is positioned on one side of the pump body 1 close to the end cover 2, and the other double composite bearing is positioned on one side of the pump body 1 far away from the end cover 2;
the eccentric ring 17 is sleeved outside the outer rotor 13, a sliding groove 171 for accommodating the bulge 18 is formed in the circumference of the eccentric ring 17, the corresponding central angle of the sliding groove 171 is 180 degrees, a circle of lubrication groove 172 is formed in the inner surface of the eccentric ring 17, which is in contact with the outer rotor 13, and an eccentric lubrication channel 173 for communicating the lubrication groove 172 with the oil inlet channel 3 is formed in the eccentric ring 17 and the pump body 1;
the protrusion 18 is provided on the pump body 1 and faces the eccentric ring 17, and the protrusion 18 may be a non-integral structure in which a cylindrical pin is inserted into a groove.
The end cover 2 is provided with a seal groove 23 which is positioned between the end cover and the pump body 1, and a seal ring is arranged in the seal groove 23 to prevent oil from leaking from between the end cover 2 and the pump body 1.
In addition, the oil inlet channel 3 and the oil outlet channel 4 are L-shaped, so that the oil inlet channel 3 and the oil outlet channel 4 can face one side of the end cover 2 back to the oil inlet and the oil outlet after bypassing the interface 14, the pump body 1 is more compact, and the occupied space is smaller. The flat wire head 111 is arranged at one end of the pump shaft 11 connected with the power source, and the flat wire has the advantages of large design transmission torque, good manufacturability and convenient assembly.
As shown in fig. 2, when the gerotor pump rotates clockwise:
the power source drives the pump shaft 11 to rotate through the flat wire head, the pump shaft 11 drives the inner rotor 12 in interference fit to rotate, the inner rotor 12 drives the outer rotor 13, so that the space of the engagement of the inner and outer devices is changed from small to large, partial vacuum is formed, oil is sucked from the oil inlet channel 3 under the action of atmospheric pressure, the space of the engagement is changed to small when the oil is transferred to the oil outlet channel 4, and the oil is extruded into the oil outlet channel 4; in addition, oil can enter the lubrication groove 172 through the eccentric lubrication passage, thereby lubricating between the outer rotor 13 and the eccentric ring 17.
As shown in fig. 3, when the gerotor pump changes from clockwise rotation to counterclockwise rotation:
before the oil enters the oil inlet channel 3, the negative pressure near the oil inlet channel 3 can pump part of the oil in the lubrication groove 172 out of the oil inlet channel 3, so that the friction between the outer rotor 13 and the eccentric ring 17 is improved; then, the outer rotor 13 can drive the eccentric ring 17 to rotate 180 ° until being limited by the protrusions 18, so that the engagement of the inner rotor 12 and the outer rotor 13 is still enlarged in volume at the oil inlet channel 3 and reduced in volume at the oil outlet channel 4, thereby not changing the direction of oil inlet and outlet.
The beneficial effects of this embodiment include:
the end cover 2 is positioned on one side of the pump body 1, only one sealing plane is needed, and the requirement of central positioning is avoided, so that the product is more reliable, the structure is simple, the manufacturing difficulty is low, and the precision reduction caused by assembly and assembly of parts is reduced; the oil drain port 15 is communicated with the outside of the interface 14 and the oil outlet channel 4, so that pumped oil can be drained out for a part of the cycloid pump to directly lubricate a shaft or a bearing for driving the cycloid pump, an additional design oil way is not needed, and the structural complexity of the box body is reduced.
In the second embodiment, as shown in fig. 6 and 7, unlike in the second embodiment, a positioning groove 21 is provided on a side of the end cap 2 facing the pump body 1, a positioning column 22 is provided in the positioning groove 21, a sliding groove 171 for accommodating the positioning column 22 is provided on the eccentric ring 17 circumferentially, and a central angle corresponding to the sliding groove 171 is 180 °. Since the sliding groove 171 faces the end cover 2, the eccentric lubrication passage 173 in the eccentric ring 17 can avoid the weakness of the eccentric ring 17 as shown.
The positioning column 22 can serve as a positioning base to limit the installation of the end cover 2 and the pump body 1 while limiting the eccentric ring 17, so that the accuracy of the installation is improved.

Claims (8)

1. The utility model provides a cycloid pump for lubricating system, its characterized in that includes the pump body and end cover, the end cover is located pump body one side, the pump body is provided with oil inlet channel and play oil channel, the pump body still includes:
the pump shaft is arranged in the pump body in a penetrating way, and one end of the pump shaft is propped against the end cover;
the cycloid rotor pair is sleeved on the pump shaft;
the interface is arranged on one side of the pump body, which is far away from the end cover, and is used for connecting an external power gear box;
the oil drain port is arranged on the pump body and is communicated with the outside of the interface and the oil outlet channel.
2. The gerotor pump for a lubrication system of claim 1, wherein: and the pump shaft is sleeved with a double composite bearing, one of the double composite bearings is positioned on one side of the pump body close to the end cover, and the other double composite bearing is positioned on one side of the pump body far away from the end cover.
3. The gerotor pump for a lubrication system of claim 1, wherein: the oil inlet channel and the oil outlet channel are L-shaped.
4. A gerotor pump for a lubrication system according to claim 1 or 2 or 3, characterized in that: the cycloid rotor pair comprises an inner rotor sleeved on a pump shaft and an outer rotor meshed with the inner rotor, an eccentric ring is sleeved outside the outer rotor, a bulge facing the eccentric ring is arranged in the pump body, a sliding groove for accommodating the bulge is circumferentially formed in the eccentric ring, and the central angle corresponding to the sliding groove is 180 degrees.
5. The gerotor pump for a lubrication system of claim 4, wherein: a circle of lubrication groove is formed in the inner surface of the eccentric ring, which is in contact with the outer rotor, and an eccentric lubrication channel which is communicated with the lubrication groove and the oil inlet channel is formed in the eccentric ring and the pump body.
6. A gerotor pump for a lubrication system according to claim 1 or 2 or 3, characterized in that: the cycloid rotor pair comprises an inner rotor sleeved on a pump shaft and an outer rotor meshed with the inner rotor, an eccentric ring is sleeved outside the outer rotor, a positioning groove is formed in one side, facing the pump body, of the end cover, a positioning column is arranged in the positioning groove, a sliding groove for accommodating the positioning column is formed in the circumference of the eccentric ring, and the central angle corresponding to the sliding groove is 180 degrees.
7. A gerotor pump for a lubrication system according to claim 1 or 2 or 3, characterized in that: and a sealing groove is arranged on the end cover.
8. A gerotor pump for a lubrication system according to claim 1 or 2 or 3, characterized in that: and a flat wire head is arranged at one end of the pump shaft connected with the power source.
CN202320296224.6U 2023-02-17 2023-02-17 Cycloidal pump for lubrication system Active CN219606716U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320296224.6U CN219606716U (en) 2023-02-17 2023-02-17 Cycloidal pump for lubrication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320296224.6U CN219606716U (en) 2023-02-17 2023-02-17 Cycloidal pump for lubrication system

Publications (1)

Publication Number Publication Date
CN219606716U true CN219606716U (en) 2023-08-29

Family

ID=87739834

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320296224.6U Active CN219606716U (en) 2023-02-17 2023-02-17 Cycloidal pump for lubrication system

Country Status (1)

Country Link
CN (1) CN219606716U (en)

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