CN220979844U - Novel cycloidal gear and cycloidal gear pump - Google Patents
Novel cycloidal gear and cycloidal gear pump Download PDFInfo
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- CN220979844U CN220979844U CN202322607604.XU CN202322607604U CN220979844U CN 220979844 U CN220979844 U CN 220979844U CN 202322607604 U CN202322607604 U CN 202322607604U CN 220979844 U CN220979844 U CN 220979844U
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- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 208000002925 dental caries Diseases 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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Abstract
The utility model discloses a novel cycloidal gear and a cycloidal gear pump, which comprise an inner gear and an outer gear, wherein a plurality of oil holes are formed in the inner gear and the outer gear, the oil holes penetrate through the end face of the gear, the pressure on two sides of the inner gear and the outer gear is balanced through the oil holes, and oil passes through the oil holes to establish a complete oil film on the surfaces of the inner gear and the outer gear; according to the novel cycloidal gear and the cycloidal gear pump provided by the utility model, through arranging the oil through holes on the gears of the cycloidal gear pump, the pressure between two friction pairs of the cycloidal gear pump can be balanced rapidly, the rotor is prevented from overturning, the abrasion of the gears and tooth cavities is reduced, and the service life of the cycloidal gear pump is prolonged.
Description
Technical Field
The utility model belongs to the technical field of cycloidal gear pumps, and particularly relates to a novel cycloidal gear and a cycloidal gear pump.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The cycloidal gear pump is a component which is connected with an engine or a motor and can convert the kinetic energy of the engine or the motor into hydraulic energy; the tooth profile of the driving/driven gear inside the gear is a cycloid or a cylindrical gear with equidistant curves. The main components of the cycloidal gear pump comprise an internal gear and an external gear, wherein the internal gear and the external gear are meshed and rotated, and the end face of the gear and the plane of a front cover or the plane of a rear cover form a rotor friction pair.
The internal gear and the external gear used by the existing cycloid gear pump are shown in figures 1-4, the pressures at two sides are inconsistent in the rotation and engagement process of the gears, so that the gears are easy to wear, further early wear and even locking of a rotor friction pair are caused, the failure rate is high, and the service life of the gears is shortened.
Disclosure of utility model
The utility model aims to provide a novel cycloidal gear and a cycloidal gear pump, oil is filled between rotor friction pairs through evenly arranged oil holes arranged on an inner gear and an outer gear, a complete oil film is established, gear friction is reduced, and the service life of the gear pump is prolonged.
In order to achieve the above object, the present utility model is realized by the following technical scheme:
In a first aspect, an embodiment of the present utility model provides a novel cycloid gear, including an inner gear and an outer gear, where the inner gear and the outer gear are each provided with a plurality of oil holes, the oil holes penetrate through an end surface of the gear, balance pressures on two sides of the inner gear and the outer gear through the oil holes, and make oil pass through the oil holes to establish a complete oil film on surfaces of the inner gear and the outer gear.
As a further technical scheme, the oil through holes on the internal gear are arranged at the middle position of each gear tooth of the internal gear, the oil through holes are round, and the circle centers of the oil through holes on the internal gear are on the same circumference.
As a further technical scheme, the diameter of the oil through hole on the internal gear is smaller than one third of the thickness of the gear teeth of the internal gear.
As a further technical scheme, the oil holes on the external gear are uniformly formed in the external gear, and the number of the oil holes on the external gear is the same as that of the gear teeth of the external gear.
As a further technical scheme, the oil through holes on the external gear are arranged at the middle position of each gear tooth of the external gear.
As a further technical scheme, the oil holes are round, and the circle centers of the oil holes on the external gear are on the same circumference.
As a further technical scheme, the diameters of the oil holes on the inner gear and the outer gear are the same.
As a further technical scheme, the oil through holes are round, square or other shapes.
In a second aspect, embodiments of the present utility model provide a novel cycloidal gear pump, including the novel cycloidal gear of the first aspect, wherein the internal gear is disposed in the external gear, and the external gear and the internal gear are eccentrically engaged.
As a further technical scheme, the external gear has one more gear tooth than the internal gear.
The beneficial effects of the embodiment of the utility model are as follows:
According to the novel cycloidal gear and the cycloidal gear pump provided by the utility model, through arranging the oil through holes on the gears of the cycloidal gear pump, the pressure between two friction pairs of the cycloidal gear pump can be balanced rapidly, the rotor is prevented from overturning, the abrasion of the gears and tooth cavities is reduced, and the service life of the cycloidal gear pump is prolonged.
Because the pressure of the inner tooth side and the outer tooth side of the gear is uneven under the working state of the cycloid gear pump, oil is filled between the rotor friction pair rapidly by arranging the oil through holes penetrating through the gear, a complete oil film is built, the pressure of two sides is balanced, the abrasion of the gear is reduced, and the service life of the cycloid gear pump is prolonged.
The utility model has simple structure, easy realization, balanced pressure, reduced abrasion, reduced weight of the gear, and improved efficiency and dynamic performance of gear transmission.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic diagram of a prior art internal gear;
FIG. 2 is an internal cross-sectional view of an internal gear of the prior art;
FIG. 3 is a schematic view of an external gear in the prior art;
FIG. 4 is an internal cross-sectional view of an external gear of the prior art;
fig. 5 is a schematic structural view of an internal gear of the present utility model;
fig. 6 is an internal cross-sectional view of an internal gear of the present utility model;
fig. 7 is a schematic structural view of an external gear of the present utility model;
Fig. 8 is an internal cross-sectional view of the external gear of the present utility model.
The schematic is used only as schematic;
1, an internal gear; 2. an external gear; 3. and an oil through hole.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
Interpretation of related terms:
Cycloidal gear pump: the cycloidal gear pump is a component which is connected with an engine or a motor and can convert the kinetic energy of the engine or the motor into hydraulic energy; the tooth profile of the driving/driven gear inside the gear is a cycloid or a cylindrical gear with equidistant curves.
Rotor friction pair: and a friction pair formed by the end face of the rotor and the front cover plane or the rear cover plane.
Oil film: pure liquid lubrication is called complete oil film; boundary lubrication is called partial oil film; dry friction is known as oil free film.
Oil hole: the oil through holes are formed in the gears, so that oil is uniformly attached to two sides of a gear plane when the gear pump works.
Example 1
As shown in fig. 1-4, in the conventional cycloidal gear pump, the internal gear 1 and the external gear 2 are in friction with the front cover or the rear cover plane due to inconsistent pressures at two sides of the gears, so that the gears are easy to wear, even lock, and the failure rate is high.
In order to solve the problems existing in the prior art, in an exemplary embodiment of the present utility model, as shown in fig. 5 to 8, a novel cycloidal gear is provided, which includes an inner gear 1 and an outer gear 2, wherein a plurality of oil holes 3 are formed in the inner gear and the outer gear, the oil holes 3 penetrate through the end surfaces of the gears, the pressures on both sides of the inner gear 1 and the outer gear 2 are balanced through the oil holes 3, and oil passes through the oil holes 3 to establish a complete oil film on the surfaces of the inner gear 1 and the outer gear 2.
Specifically, as shown in fig. 5 and 6, the oil holes on the internal gear are uniformly formed in the external gear, and the number of the oil holes on the internal gear is the same as that of the teeth of the internal gear, as shown in fig. 5, the number of the teeth of the internal gear is 5, and the liquid level of the number of the oil holes on the corresponding internal gear is 5. Further, the oil through holes 3 on the internal gear 1 are arranged at the middle position of each gear tooth of the internal gear 1, the oil through holes 3 are round, the circle centers of all the oil through holes on the internal gear 1 are on the same circumference, and the diameter of the oil through holes on the internal gear is smaller than one third of the thickness of the gear teeth of the internal gear, so that the strength of the internal gear is not affected by the arrangement of the oil through holes.
Further, as shown in fig. 7 and 8, the oil holes on the external gear are uniformly formed in the external gear 2, the number of the oil holes 3 on the external gear 2 is the same as the number of the teeth of the external gear 2, the number of the teeth of the external gear is 6, and the number of the oil holes on the corresponding external gear is 6. Further, the oil through holes 3 on the external gear 2 are arranged at the middle position of each gear tooth of the external gear 2, the oil through holes 3 are circular, the circle centers of all the oil through holes on the external gear 1 are on the same circumference, and the diameter of the oil through holes on the internal gear is smaller than one third of the thickness of the gear teeth of the internal gear, so that the strength of the external gear is not affected by the arrangement of the oil through holes.
In this embodiment, the circle centers of the oil holes on the internal gear may be uniformly distributed on the pitch circle of the internal gear, and the circle centers of the oil holes on the external gear may be uniformly distributed on the pitch circle of the external gear, so that standardized manufacturing of the gear may be realized.
In this embodiment, the diameters of the oil holes on the inner gear and the outer gear are the same, and the size of the oil hole can be adjusted according to actual situations.
In this embodiment, the oil hole is circular, square or other shapes, and the shape of the oil hole is not specifically limited.
Through set up the oil through hole on cycloid gear pump's gear, can lighten gear weight, make rotor friction pair between be full of fluid fast, establish complete oil film, balance both sides pressure, reduce gear wearing and tearing, increase cycloid gear pump life.
Example 2
In an exemplary embodiment of the present utility model, a novel gerotor gear pump is provided, comprising the novel gerotor gear of example 1, wherein the inner gear is disposed within the outer gear, and wherein the outer gear and the inner gear are eccentrically meshed.
The external gear is provided with one more gear tooth than the internal gear, when the pump works, the teeth of all the internal gears are meshed, and the meshing line of two adjacent teeth, the pump body and the front and rear end covers form a sealed containing cavity; the inner and outer gears are eccentric, the inner rotor rotates to drive the outer rotor to rotate in the same direction, and the end cover is provided with a corresponding window.
The specific working process comprises the following steps:
Pressure generation stage: when the transmission shaft of the pump rotates, the external gear rotates in a fixed shaft manner, and the internal gear performs internal and external meshing movement along with the transmission shaft. During the meshing process, the meshing geometry of the inner and outer gears gradually decreases, so that fluid is forced to be sucked into the teeth, creating a low pressure area. During this process, the liquid in the pump is sucked in therewith.
Pressure pushing stage: when the meshing geometry of the internal gear is minimized, the meshing process changes direction suddenly and the internal and external gears are separated. At this point the pressure on the internal gear has increased to a very high level pushing the liquid towards the outlet of the pump.
By the cyclic movement of the two stages, the internal gear pump realizes continuous liquid delivery.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The novel cycloidal gear is characterized by comprising an inner gear and an outer gear, wherein a plurality of oil holes are formed in the inner gear and the outer gear, the oil holes penetrate through the end face of the gear, the pressure on two sides of the inner gear and the outer gear is balanced through the oil holes, and oil passes through the oil holes to establish a complete oil film on the surfaces of the inner gear and the outer gear.
2. The novel cycloidal gear according to claim 1, wherein the oil passing hole of the inner gear is provided at a middle position of each gear tooth of the inner gear, the oil passing hole is circular, and the centers of the oil passing holes of the inner gear are on the same circumference.
3. The novel cycloidal gear according to claim 2 wherein the diameter of the oil passing hole of the inner gear is less than one third of the thickness of the teeth of the inner gear.
4. The novel cycloidal gear according to claim 1, wherein the oil holes on the external gear are uniformly formed in the external gear, and the number of the oil holes on the external gear is identical to the number of the teeth of the external gear.
5. The novel cycloidal gear according to claim 4, wherein the oil passing hole on the external gear is provided at an intermediate position of each gear tooth of the external gear.
6. The novel cycloidal gear according to claim 1, wherein the oil passing holes are circular, and the centers of the oil passing holes on the external gear are on the same circumference.
7. The novel cycloidal gear according to claim 6, wherein the oil holes on the inner and outer gears have the same diameter.
8. The novel cycloidal gear according to claim 1, wherein the oil passing hole is formed in a circular shape or a square shape.
9. A novel cycloidal gear pump comprising the novel cycloidal gear as claimed in any one of claims 1-8 wherein the internal gear is provided in an external gear, the external gear and internal gear being eccentrically engaged.
10. The novel gerotor gear pump of claim 9, wherein the external gear has one more gear tooth than the internal gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322607604.XU CN220979844U (en) | 2023-09-25 | 2023-09-25 | Novel cycloidal gear and cycloidal gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322607604.XU CN220979844U (en) | 2023-09-25 | 2023-09-25 | Novel cycloidal gear and cycloidal gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220979844U true CN220979844U (en) | 2024-05-17 |
Family
ID=91041883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322607604.XU Active CN220979844U (en) | 2023-09-25 | 2023-09-25 | Novel cycloidal gear and cycloidal gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220979844U (en) |
-
2023
- 2023-09-25 CN CN202322607604.XU patent/CN220979844U/en active Active
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