CN107905997B - A kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics - Google Patents
A kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics Download PDFInfo
- Publication number
- CN107905997B CN107905997B CN201710980298.0A CN201710980298A CN107905997B CN 107905997 B CN107905997 B CN 107905997B CN 201710980298 A CN201710980298 A CN 201710980298A CN 107905997 B CN107905997 B CN 107905997B
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- China
- Prior art keywords
- gear ring
- pump used
- injection molded
- peripheral surface
- ring matrix
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000011159 matrix material Substances 0.000 claims abstract description 37
- 238000002347 injection Methods 0.000 claims abstract description 30
- 239000007924 injection Substances 0.000 claims abstract description 30
- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- 230000008520 organization Effects 0.000 claims abstract description 15
- 238000001746 injection moulding Methods 0.000 claims description 3
- 229910000734 martensite Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 206010017389 Frotteurism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/084—Toothed wheels
-
- 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
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a kind of gear ring structures of anti abrasive Internal Gear Pump Used in Water Hydraulics.Including gear ring matrix, injection molded layers and straight pin, gear ring matrix outer peripheral surface is disposed with injection molded layers, and by cylinder pin connection between gear ring matrix and injection molded layers, the inner peripheral surface of gear ring matrix is machined with involute internal tooth；The injection molded layers outer peripheral surface is machined with a drum organization along axis direction, drum organization is symmetrical structure, it is divided into the three parts that ascent stage, flat segments and descending branch are successively connected along axis direction, ascent stage and descending branch are the sine curve of a quarter, and flat segments are straight line.The present invention can increase the minimum water film thickness in Internal Gear Pump Used in Water Hydraulics between this friction pair of gear ring and shell, reduce the wear phenomenon of gear ring, improve the working performance and service life of Internal Gear Pump Used in Water Hydraulics.
Description
Technical field
The present invention relates to a kind of gear rings of crescent gear pump, more particularly, to a kind of anti abrasive water hydraulic internal messing tooth
The gear ring structure of wheel pump.
Background technique
The advantages that water hydraulic is due to its environment friendly, nontoxicity, incombustibility status in hydraulic drive field is more next
It is more prominent, meet the megatrend of China's " green manufacturing ".Internal Gear Pump Used in Water Hydraulics is as crucial in water hydraulic
Dynamical element, performance have important role for the development of water hydraulic.
In Internal Gear Pump Used in Water Hydraulics, the friction pair formed between gear ring and shell is a crucial friction of the pump
It is secondary.On the one hand, due to the working characteristics of gear pump, gear ring will receive the power for pressing to shell；On the other hand, due to gear ring with
The viscosity of moisture film between shell is very low, therefore the water film thickness very little formed.Often in excessive mill between gear ring and shell
Damage state greatly reduces the working performance and service life of Internal Gear Pump Used in Water Hydraulics, limits water hydraulic internal messing tooth
The development of wheel pump.
Gear ring in Internal Gear Pump Used in Water Hydraulics at present is only molded one layer of engineering plastics in gear ring matrix outer circle, by
It is insufficient in the two binding force, it will appear the phenomenon that sliding even separates in actual operation.In addition, injection molded layers outer circle is not processed
Micro-structure cannot increase the minimum water film thickness between gear ring and shell, therefore, compared with still remaining between injection molded layers and shell
Serious wear phenomenon.
Summary of the invention
For the shortcoming of the gear ring in current Internal Gear Pump Used in Water Hydraulics, the purpose of the present invention is to provide one kind
The gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics can increase the minimum water film thickness between gear ring and shell, improve
Lubricating status between gear ring and shell improves the working performance and service life of Internal Gear Pump Used in Water Hydraulics.
The technical solution adopted by the present invention is that:
The present invention includes gear ring matrix, injection molded layers and straight pin, and gear ring matrix outer peripheral surface is disposed with injection molded layers, gear ring matrix
By cylinder pin connection between injection molded layers, the inner peripheral surface of gear ring matrix is machined with involute internal tooth.
The gear ring matrix uses martensite stainless steel material, the key job portion as Internal Gear Pump Used in Water Hydraulics
Part.
The injection molded layers are formed in gear ring matrix outer peripheral surface by injection molding manner, using Wear-resistant engineering plastic.
The injection molded layers outer peripheral surface is machined with a drum organization along axis direction, and drum organization is symmetrical structure,
It is divided into the three parts that ascent stage, flat segments and descending branch are successively connected along axis direction, ascent stage and descending branch be four/
One sine curve, flat segments are straight line, and following equation is pressed in cydariform track:
In formula, L is gear ring matrix width (mm rank), and a is sine curve amplitude (μm rank), and λ is x shared by the ascent stage
The length in direction and the ratio of gear ring matrix width, the direction x are axis direction, and the direction y is radial direction.
For circumferentially spaced arrangement there are three the strip groove that section is semicircle, bar shaped is recessed on the outer peripheral surface of the gear ring matrix
Straight pin is installed, straight pin and gear ring matrix are axially parallel in slot.Due to the snap action of straight pin, gear ring matrix is effectively improved
With the binding force of injection molded layers, prevent occurring circumferential the phenomenon that sliding or separating between the two.
The drum organization of the injection molded layers outer peripheral surface is processed by micro-structure.
The present invention can be by drum organization, between injection molded layers and the pump case contact level of Internal Gear Pump Used in Water Hydraulics
It is formed to the deformation-compensated of moisture film, so that minimum water film thickness becomes larger, reduces friction, realize the wear phenomenon for reducing gear ring.
The sine curve amplitude a value is (2 ± 0.5) μm；Ratio λ value is 1/3 to 1/2.Pass through reasonable disposition a
With the two design parameters of λ, can effectively increase in Internal Gear Pump Used in Water Hydraulics between this friction pair of gear ring and shell
Minimum water film thickness, reduce the wear phenomenon of gear ring, improve the working performance and service life of Internal Gear Pump Used in Water Hydraulics.
The beneficial effects of the present invention are: by designing the cydariform micro-structure, can with effective compensation due to gear ring and shell this
The flexible deformation of gear ring caused by moisture film pressure between friction pair and shell, to increase the minimum between friction pair
Water film thickness.Moisture film pressure between gear ring and shell can cause the elasticity of " recess " in radial direction of gear ring and shell to become
Shape；According to studies have shown that the flexible deformation will lead to the minimum water film thickness decline between friction pair.Therefore, the present invention passes through
Cydariform micro-structure of the design one in radial direction " protrusion ", compensates flexible deformation, to reach increase water film thickness
Effect.
The present invention can effectively increase in Internal Gear Pump Used in Water Hydraulics between this friction pair of gear ring and shell most
Small water film thickness reduces the wear phenomenon of gear ring, improves the working performance and service life of Internal Gear Pump Used in Water Hydraulics.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the gear ring of crescent gear pump of the present invention.
Fig. 2 is the gear ring main view of crescent gear pump of the present invention.
Fig. 3 is the gear ring partial sectional view of crescent gear pump of the present invention.
Fig. 4 is the gear ring injection molded layers outer circle axial direction cydariform micro-structure schematic diagram of crescent gear pump of the present invention.
In figure: 1. gear ring matrixes, 2. injection molded layers, 3. straight pins.
Specific embodiment
The present invention will be further described below with reference to the drawings.
As depicted in figs. 1 and 2, present invention specific implementation includes gear ring matrix 1, injection molded layers 2 and straight pin 3, gear ring matrix 1
Outer peripheral surface is disposed with injection molded layers 2, is connected between gear ring matrix 1 and injection molded layers 2 by straight pin 3, the inner peripheral surface of gear ring matrix 1 adds
Work has involute internal tooth.
As depicted in figs. 1 and 2, gear ring matrix 1 uses martensite stainless steel material, along week on the outer peripheral surface of gear ring matrix 1
To arranged for interval there are three the strip groove that section is semicircle, straight pin 3, straight pin 3 and gear ring matrix 1 are installed in strip groove
It is axial parallel.Then cydariform knot is formed in 1 outer peripheral surface micro Process of gear ring matrix by injection molding manner in the outer peripheral surface of gear ring matrix 1
The injection molded layers 2 of structure.
As shown in Figure 3 and Figure 4,2 outer peripheral surface of injection molded layers is machined with a drum organization along axis direction, and drum organization is
Symmetrical structure is divided into the three parts that ascent stage, flat segments and descending branch are successively connected, ascent stage and descending branch along axis direction
For the sine curve of a quarter, flat segments are straight line, and following equation is pressed in cydariform track:
In formula, L is 1 width mm rank of gear ring matrix, and a is sine curve amplitude μm rank, and λ is the side x shared by the ascent stage
To length and 1 width of gear ring matrix ratio, the direction x be axis direction, the direction y be radial direction.
The specific implementation course of work of the invention is as follows:
In Internal Gear Pump Used in Water Hydraulics, the friction of gear ring and this friction pair of shell and lubrication property mainly by
Minimum oil film thickness (h between the twomin) and the mixing roughness (σ) of the two determined.A parameter γ is introduced, is indicated
The ratio of the two, is shown below.
Generally, it is considered that the vice division chief that rubs is in boundary friction state, and there are serious wear phenomenons for friction surface as γ < 1；
As 1 < γ < 3, the vice division chief that rubs is in mixed film friction state, and there are certain wear phenomenons for friction surface；As γ > 3, rub vice division chief
In full hydrodynamic lubrication state, friction surface is not present or there are seldom wear phenomenons.
In Internal Gear Pump Used in Water Hydraulics, the mixing roughness of this pair of of friction surface of gear ring and shell is 0.4 μm, when
When 2 outer circle of injection molded layers does not process drum organization, minimum oil film thickness such as the following table 1, the friction surface is in boundary friction or mixing
Frotteurism, there are more serious wear phenomenons.
When 1 injection molded layers of table, 2 outer circle does not process drum organization, when the operating pressure of pump is 15MPa, different rotating speeds lower ring gear with
Minimum oil film thickness between shell
| Pump work revolving speed (rpm) | 1000 | 2000 | 3000 |
| Minimum oil film thickness hmin(μm) | 0.19 | 0.47 | 0.76 |
When the design using 2 Excircle machining drum organization of injection molded layers, and pass through the two design parameters of reasonable disposition a and λ,
The minimum water film thickness in Internal Gear Pump Used in Water Hydraulics between this friction pair of gear ring and shell can effectively be increased, so that
Minimum film thickness is in the range such as the following table 2, so that the friction surface is in the state of mixed film friction and full hydrodynamic lubrication,
Reduce the wear phenomenon of gear ring.
After 2 injection molded layers of table, 2 Excircle machining drum organization, when the operating pressure of pump is 15MPa, different rotating speeds lower ring gear and shell
Minimum oil film thickness between body
| Pump work revolving speed (rpm) | 1000 | 2000 | 3000 |
| Minimum oil film thickness hmin(μm) | 0.87 | 1.25 | 1.62 |
Thus illustrate that the present invention can effectively reduce the wear phenomenon of gear ring, improve the work of Internal Gear Pump Used in Water Hydraulics
There is it to protrude significant technical effect for performance and service life.
Claims (5)
1. a kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics, it is characterised in that: including gear ring matrix (1), note
Modeling layer (2) and straight pin (3), gear ring matrix (1) outer peripheral surface are disposed with injection molded layers (2), gear ring matrix (1) and injection molded layers (2) it
Between connected by straight pin (3), the inner peripheral surface of gear ring matrix (1) is machined with involute internal tooth；
Injection molded layers (2) outer peripheral surface is machined with a drum organization along axis direction, and drum organization is symmetrical structure, edge
Axis direction be divided into the three parts that ascent stage, flat segments and descending branch are successively connected, ascent stage and descending branch are a quarter
Sine curve, flat segments are straight line, and following equation is pressed in cydariform track:
In formula, L is gear ring matrix (1) width (mm rank), and a is sine curve amplitude (μm rank), and λ is x shared by the ascent stage
The length in direction and the ratio of gear ring matrix (1) width, the direction x are axis direction, and the direction y is radial direction.
2. a kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics according to claim 1, it is characterised in that:
The gear ring matrix (1) uses martensite stainless steel material, the key working part as Internal Gear Pump Used in Water Hydraulics.
3. a kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics according to claim 1, it is characterised in that:
The injection molded layers (2) are formed in gear ring matrix (1) outer peripheral surface by injection molding manner.
4. a kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics according to claim 1, it is characterised in that:
Circumferentially spaced arrangement installs straight pin in strip groove there are three strip groove on the outer peripheral surface of the gear ring matrix (1)
(3), straight pin (3) is axial parallel with gear ring matrix (1).
5. a kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics according to claim 1, it is characterised in that:
The drum organization of described injection molded layers (2) outer peripheral surface is processed by micro-structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710980298.0A CN107905997B (en) | 2017-10-19 | 2017-10-19 | A kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710980298.0A CN107905997B (en) | 2017-10-19 | 2017-10-19 | A kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107905997A CN107905997A (en) | 2018-04-13 |
| CN107905997B true CN107905997B (en) | 2019-03-08 |
Family
ID=61840765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710980298.0A Active CN107905997B (en) | 2017-10-19 | 2017-10-19 | A kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics |
Country Status (1)
| Country | Link |
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| CN (1) | CN107905997B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797887A (en) * | 2009-08-10 | 2010-08-11 | 宁波高新协力机电液有限公司 | Multi-functional drive element used for oil-liquid hybrid electric vehicle |
| CN102483057A (en) * | 2009-07-31 | 2012-05-30 | 罗伯特·博世有限公司 | Gear pump |
| CN103089963A (en) * | 2013-01-28 | 2013-05-08 | 西安理工大学 | Inner meshing tooth profile pair |
| CN203146313U (en) * | 2013-02-04 | 2013-08-21 | 嘉兴东唐汽车科技有限公司 | Internally-meshed gear pump |
| CN106763646A (en) * | 2016-12-21 | 2017-05-31 | 怀宁县凉亭建材有限责任公司 | Corrosion-resistant nested type gear and gear pump bottle placer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006041633A1 (en) * | 2006-09-05 | 2008-03-13 | Herold & Co. Gmbh | pump |
-
2017
- 2017-10-19 CN CN201710980298.0A patent/CN107905997B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102483057A (en) * | 2009-07-31 | 2012-05-30 | 罗伯特·博世有限公司 | Gear pump |
| CN101797887A (en) * | 2009-08-10 | 2010-08-11 | 宁波高新协力机电液有限公司 | Multi-functional drive element used for oil-liquid hybrid electric vehicle |
| CN103089963A (en) * | 2013-01-28 | 2013-05-08 | 西安理工大学 | Inner meshing tooth profile pair |
| CN203146313U (en) * | 2013-02-04 | 2013-08-21 | 嘉兴东唐汽车科技有限公司 | Internally-meshed gear pump |
| CN106763646A (en) * | 2016-12-21 | 2017-05-31 | 怀宁县凉亭建材有限责任公司 | Corrosion-resistant nested type gear and gear pump bottle placer |
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| Publication number | Publication date |
|---|---|
| CN107905997A (en) | 2018-04-13 |
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