CN107327688A - A kind of dual-rotor structure lubricating oil pump - Google Patents
A kind of dual-rotor structure lubricating oil pump Download PDFInfo
- Publication number
- CN107327688A CN107327688A CN201710704736.0A CN201710704736A CN107327688A CN 107327688 A CN107327688 A CN 107327688A CN 201710704736 A CN201710704736 A CN 201710704736A CN 107327688 A CN107327688 A CN 107327688A
- Authority
- CN
- China
- Prior art keywords
- rotor
- oil
- pump
- internal rotor
- outer rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/20—Rotary pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N23/00—Special adaptations of check valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
A kind of dual-rotor structure lubricating oil pump that the present invention is provided, is related to machine oil pump technical field, and it includes the pump housing, pump cover, driving shaft and internal rotor and outer rotor in pump housing rotor chamber；Oil inlet and oil-out are offered on the pump housing, internal rotor is arranged on driving shaft, and driving shaft passes through the pump housing and pump cover, outer rotor is sleeved on outside internal rotor, it is characterised in that：Internal rotor includes the first internal rotor and the second internal rotor, outer rotor includes the first outer rotor and the second outer rotor, the thickness of first outer rotor is more than the thickness of the first internal rotor, and the first outer rotor is sleeved on the first internal rotor and the second internal rotor, and the second outer rotor is sleeved on the second internal rotor.The present invention is not only simple to manufacture, and pumps out that oil mass is big, oil pressure is high, is applicable on big-block engine.
Description
Technical field
The present invention relates to machine oil pump technical field, a kind of especially rotor-type oil pump.
Background technology
In lubricating system, the effect of lubricating oil pump is to bring up to machine oil after certain pressure, is forcibly sent to engine
On the moving surface of each part, rotor-type oil pump, as one kind of lubricating oil pump, with compact conformation, appearance and size is small, weight
Gently, oil suction vacuum is larger, and pump oil amount is big, and fuel feeding uniformity is good, the low feature of cost, is generally used for medium and small engine
On, and in order to expand the application of rotor-type oil pump, making it supporting with big-block engine, designer generally requires
The size of lubricating oil pump is adjusted, mainly increases the thickness of rotor part, with the higher oil pressure of realization and discharge capacity.
Powder metallurgy, is to produce metal dust or with metal dust as raw material, by shaping and sintering, manufactures metal material
The technology of material, composite and all kinds product, it has unique chemical composition and machinery, physical property, and
These performances can not be obtained with traditional casting method, it also have energy-conservation, material saving, excellent performance, Product Precision height and
The advantages of stability is good, therefore the various types of lubricating oil pump of making are widely used in, wherein, small rotor-type lubricating oil pump（With
Medium and small engine is supporting）It is no exception, but because the mobility of metal dust compares molten metal（The raw material of founding）It is poor,
Therefore powder metallurgical technique is limited to the shape and size of product, it is impossible to large product is made.
Analyzed based on more than, we understand, the supporting rotor-type oil pump with big-block engine, because rotor part is too thick
And be difficult to adopt powder metallurgical technique to make, it is difficult to reach technological requirement again if made using traditional casting method, because
This, in machine oil pump technical field, researches and develops a kind of manufacturing process simply, and can also realize the rotator type of high oil pressure, huge discharge
Lubricating oil pump, the emphasis paid close attention to always as the field.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of dual-rotor structure lubricating oil pump, and it is not only simple to manufacture, and
Pump out that oil mass is big, oil pressure is high, be applicable on big-block engine.
To achieve these goals, the present invention is adopted the following technical scheme that：Including the pump housing, pump cover, driving shaft and positioned at pump
Internal internal rotor and outer rotor, the internal rotor is fixed on driving shaft, and the outer rotor is sleeved on internal rotor, the pump
Oil inlet and oil-out are offered on body, the internal rotor includes turning in the first internal rotor and the second internal rotor, and described first
The end face of the end face and the second internal rotor of son is brought into close contact, and the outer rotor includes the first outer rotor and the second outer rotor, and institute
The end face for stating the first outer rotor and the second outer rotor is brought into close contact, and the thickness of second internal rotor is more than the thickness of the second outer rotor
Degree, and the thickness sum of first internal rotor, the second internal rotor is equal to the first outer rotor, the thickness sum of the second outer rotor.
Further, oil sucting cavity and oil-discharging cavity are offered on the pump housing and pump cover, the oil inlet connection pump housing
The oil sucting cavity of oil sucting cavity and pump cover, the oil-out includes the first oil-out and the second oil-out, the first oil-out connection
The oil-discharging cavity of the pump housing, second oil-out connects the oil-discharging cavity of pump cover.
Further, connected between the driving shaft and the first internal rotor, the second internal rotor using key.
Further, offered on the pump cover and pressure limiting valve is provided with the valve chamber of connection oil-discharging cavity, the valve chamber, it is described
The pump housing connects the drain path that valve chamber, the other end connect engine driving system, the state opened in pressure limiting valve provided with one end
Under, the fluid of pump cover oil-discharging cavity can enter drain path, let out toward in the transmission system of engine.
Further, the pressure limiting valve includes plunger and spring, and the spring one end is located in plunger, the other end is fixed
In valve chamber bottom, the plunger is by the hydraulic coupling of oil-discharging cavity and the elastic force of spring.
Preferably, the pressure limiting valve also includes regulating bolt, the cover plate installed in valve chamber bottom and is slidably mounted on valve chamber
Interior closure, the spring one end is located in plunger, the other end is fixed on closure, the regulating bolt through cover plate and
Both threaded connections, the end of the regulating bolt is contacted with closure, head end is outside cover plate.
The beneficial effects of the present invention are：Provided with two sets of rotors in a kind of dual-rotor structure lubricating oil pump, its pump housing, two sets turn
Powder metallurgical technique manufacture can be respectively adopted in son, reduce manufacture difficulty；Because the first outer rotor had both been sleeved on the first internal rotor
On, and be also sleeved on the second internal rotor, therefore the synchronism that two sets of rotors are rotated can be effectively improved, and because two sets of rotors can
Synchronous working, thus the present invention pump out oil pressure and flow can reach high values, make to present invention can be suitably applied on big-block engine.
Brief description of the drawings
Fig. 1 is the sectional view of the embodiment of the present invention；
Fig. 2 is the side view in the embodiment of the present invention；
Fig. 3 is the sectional view of pressure limiting valve in the embodiment of the present invention.
Reference is：
1 --- the pump housing 2 --- pump cover 3 --- driving shaft
4 --- internal rotor 41 --- the first internal rotor 42 --- second internal rotors
5 --- outer rotor 51 --- the first outer rotor 52 --- second outer rotors
6 --- oil inlet 7 --- oil-out 71 --- first oil-outs
72 --- the second oil-out 8 --- key 9 --- pressure limiting valves
91 --- plunger 92 --- spring 93 --- regulating bolts
94 --- cover plate 95 --- closure 10 --- pressure release passages
11 --- travelling gear.
Embodiment
For the ease of the understanding of those skilled in the art, the present invention is made further with reference to embodiment and accompanying drawing
It is bright, the content that embodiment is referred to not limitation of the invention.
In the description of the invention, it is to be understood that term " on ", " under ", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " top ", " bottom ", " interior ", " outer " are based on orientation shown in the drawings or position
Relation is put, the description present invention is for only for ease of and simplifies description, rather than indicate or imply that the device or element of meaning are necessary
With specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
In the description of the invention, it is necessary to explanation, unless otherwise prescribed and limit, term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanically connect or electrical connection or the connection of two element internals, can
To be to be joined directly together, it can also be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of the term.
As Figure 1-3, a kind of dual-rotor structure lubricating oil pump, including the pump housing 1, pump cover 2, driving shaft 3 and positioned at the pump housing 1
Internal rotor 4 and outer rotor 5 in rotor chamber, the internal rotor 4 are fixed on driving shaft 3, and the outer rotor 5 is sleeved on internal rotor
Oil inlet 6 and oil-out 7 are offered on 4 outsides, the pump housing 1, the internal rotor 4 includes turning in the first internal rotor 41 and second
Son 42, and the end face of the end face of first internal rotor 41 and the second internal rotor 42 is brought into close contact, the outer rotor 5 includes first
The outer rotor 52 of outer rotor 51 and second, and the end face of first outer rotor 51 and the second outer rotor 52 is brought into close contact, described
The thickness of two internal rotors 42 is more than the thickness of the second outer rotor 52, and first internal rotor 41, the thickness of the second internal rotor 42
Sum is equal to the first outer rotor 51, the thickness sum of the second outer rotor 52, and the first outer rotor 51 is set with the second outer rotor 52
On the second internal rotor 42, and the first outer rotor 51 is also sleeved on the first internal rotor 41.
Provided with two sets of rotors in the birotor lubricating oil pump that above-mentioned embodiment is provided, its pump housing 1, this two sets of rotors can first divide
Manufacture is opened, is remerged on driving shaft 3, equally, whole manufacturing process uses PM technique, and this greatly reduces work
Skill difficulty；The above-mentioned outer rotor 52 of first outer rotor 51 and second is sleeved on the second internal rotor 42, so, works as driving shaft
When 3 drive internal rotors 4 are rotated, the second internal rotor 42 drives the first outer rotor 51 to be rotated with the second outer rotor 52 simultaneously, and first
Outer rotor 52 is again simultaneously by the drive of the first internal rotor 41, and two sets of rotors had not only mutually driven but also mutually restriction is rotated, therefore two
The rotation of set rotor can keep high level of synchronization, and just because of two sets of rotors can work asynchronously, the unit fluid pump of whole lubricating oil pump
Go out discharge capacity and pump out discharge capacity sum for two sets of rotors, it is of the invention to pump out oil pressure and flow can reach high values, multiple types can be met
The lubricating requirement of the engine of type, including big-block engine.
Further, as shown in figure 1, because internal rotor 4, outer rotor 5 compare thick, when driving shaft 3 is rotated, internal rotor 4 with
The fluid that the between cog of outer rotor 5 is saved is more, to make fluid suck and discharge in time, can be opened up on the pump housing 1 and pump cover 2
Oil sucting cavity and oil-discharging cavity, the oil sucting cavity of the oil inlet connection pump housing 1 and the oil sucting cavity of pump cover 2, and the oil-out 7 includes the
One oil-out 71 and the second oil-out 72, the first oil-out 71 are located at the top of the pump housing 1, and the second oil-out 72 is located on pump cover 2, institute
The oil-discharging cavity that the first oil-out 71 connects the pump housing 1 is stated, second oil-out 72 connects the oil-discharging cavity of pump cover 2.
First internal rotor 41 and the second internal rotor 42 are arranged on driving shaft 3, simplest interference fit can be used, and
First internal rotor 41 is interference fitted with driving shaft 3 respectively with the second internal rotor 42, and this assembly method is fairly simple, but internally
The assembly precision of rotor 4 and driving shaft 3 requires higher, and the operation technique of technical staff is accurate, if both assembly precisions
The first internal rotor 41 positions inaccurate with the second internal rotor 42 during not high enough or manual assembly, can cause the first internal rotor 41 and
The double wedge misalignment of two internal rotors 42, the synchronism that two sets of rotors of influence are rotated, influences overall performance.
Therefore, further, as shown in figure 1, offering strip keyway on the driving shaft 3, first internal rotor
41st, it also is provided with strip keyway on the second internal rotor 42, the keyway of the keyway of internal rotor 4 just to driving shaft 3 is equipped with inside keyway
Key 8, during manufacture, the first internal rotor 41, the second internal rotor 42 are integrally formed with key 8, can be prevented effectively from manual assembly
Error, with above-mentioned interference fit Technical comparing, such a method is simpler, and assembling effect is more preferable.
Further, as shown in Figures 2 and 3, it is communicated with setting in the valve chamber of oil-discharging cavity, the valve chamber on the pump cover 2
Limited valve 9, the pump housing 1 connects the drain path 10 that valve chamber, the other end connect engine driving system provided with one end, limit
Pressure valve 9 is in the state of opening, and the unnecessary fluid of the oil-discharging cavity of pump cover 2 first flows out from pressure limiting valve 9, passes through drain path 10, arrives
In the travelling gear 11 rotated up to driving driving shaft 3, and then also reach in the drive disk assemblies such as the drive gear of engine, the oil
The drive disk assemblies such as liquid Castor Oil travelling gear 11, drive gear, reduce their mechanical wear, extend their service life.
Further, as shown in figure 3, specifically, the valve chamber is mutually perpendicular to drain path 10, the pressure limiting valve 9 is wrapped
The plunger 91 and spring 92 for being horizontally installed on valve chamber are included, described one end of spring 92 is located in plunger 91, the other end is fixed on valve chamber
Bottom, the plunger 91 is by the hydraulic coupling of oil-discharging cavity and the elastic force of spring 92.Such a pressure limiting valve 9 it is relatively simple for structure, in advance
The spring ratio of spring 92 is set, when the hydraulic coupling of oil-discharging cavity is more than the elastic force of spring 92, plunger 91 heads on spring 92 1
Motion of turning right is acted, oil-discharging cavity is connected with drain path 10, unnecessary fluid enters drain path 10；When the hydraulic coupling of oil-discharging cavity
Less than spring 92 elastic force when, the resilience of spring 92, toward left movement together with plunger 91, block drain path 10 entrance, prevent
The fluid of oil-discharging cavity flows into drain path 10.
Preferably, the pressure limiting valve 9 also includes regulating bolt 93, the cover plate 94 installed in valve chamber bottom and slides peace
Closure 95 in valve chamber, described one end of spring 92 is located in plunger 91, the other end is fixed on closure 95, described to adjust
Bolt 93 is saved through cover plate 94 and both threaded connections, the end of the regulating bolt 93 is contacted with closure 95, head end is located at
Cover plate 94（Namely pump cover 2）Outside.Explanation especially set out is needed herein, for convenience by plunger 91, spring 92 and closure 95
In valve chamber, valve chamber bottom should be open before pressure limiting valve 9 is installed, and the purpose of design cover plate 94 is：First, may be used
Valve chamber bottom is sealed；2nd, it is convenient that regulating bolt 93 is installed.Because the head end of regulating bolt 93 is located at outside pump cover 2, therefore this implementation
The lubricating oil pump that mode is provided is before dispatching from the factory, and staff will set position of the closure 95 in valve chamber by regulating bolt 93
Put, when regulating bolt 93 turns clockwise, regulating bolt 93 promotes closure 95 to overcome the elastic force of spring 92 with respect to valve chamber
It is moved to the left together, spring 92 is compressed, the elastic force increase of spring 92, when 93 rotate counterclockwise of regulating bolt, regulating bolt
93 relative valve chambers move right, and closure 95 also moves right under the elastic force effect of spring 92, stop revolving in regulating bolt 93
Closure 95 also stops movement while turning, and now, spring 92 is upheld, and the elastic force of spring 92 reduces, it can be seen that, closure 95
Position it is different, initial elastic force namely difference when spring 92 dispatches from the factory, but if pressure limiting valve 9 operationally needs to change spring 92
The situation of elastic force, staff can also be turned regulating bolt 93 by scene and solve problems, consequently, it is possible to eliminate dismounting
The inconvenience that pressure limiting valve is brought.
Above-described embodiment is the present invention preferably implementation, and in addition, the present invention can be realized with other manner,
Any obvious replacement is within protection scope of the present invention on the premise of not departing from the technical program design.
In order to allow those of ordinary skill in the art more easily to understand improvements of the present invention relative to prior art, this
Some accompanying drawings of invention and description have been simplified, and for the sake of clarity, present specification is omitted some other members
Element, those of ordinary skill in the art should be aware that these elements omitted also may make up present disclosure.
Claims (6)
1. a kind of dual-rotor structure lubricating oil pump, including the pump housing（1）, pump cover（2）, driving shaft（3）And positioned at the pump housing（1）Interior interior turn
Son（4）With outer rotor（5）, the internal rotor（4）It is fixed on driving shaft（3）On, the outer rotor（5）It is sleeved on internal rotor（4）
On, the pump housing（1）On offer oil inlet（6）With oil-out（7）, it is characterised in that：The internal rotor（4）In first
Rotor（41）With the second internal rotor（42）, and first internal rotor（41）End face and the second internal rotor（42）End face it is close
Laminating, the outer rotor（5）Including the first outer rotor（51）With the second outer rotor（52）, and first outer rotor（51）With
Two outer rotors（52）End face be brought into close contact, second internal rotor（42）Thickness be more than the second outer rotor（52）Thickness,
And first internal rotor（41）, the second internal rotor（42）Thickness sum be equal to the first outer rotor（51）, the second outer rotor
（52）Thickness sum.
2. dual-rotor structure lubricating oil pump according to claim 1, it is characterised in that：The pump housing（1）And pump cover（2）It is upper equal
Oil sucting cavity and oil-discharging cavity are offered, the oil inlet connects the pump housing（1）Oil sucting cavity and pump cover（2）Oil sucting cavity, it is described fuel-displaced
Mouthful（7）Including the first oil-out（71）With the second oil-out（72）, first oil-out（71）Connect the pump housing（1）Oil extraction
Chamber, second oil-out（72）Connect pump cover（2）Oil-discharging cavity.
3. dual-rotor structure lubricating oil pump according to claim 2, it is characterised in that：The driving shaft（3）With first interior turn
Son（41）, the second internal rotor（42）Between use key（8）Connection.
4. dual-rotor structure lubricating oil pump according to claim 3, it is characterised in that：The pump cover（2）On offer connection
Pressure limiting valve is provided with the valve chamber of oil-discharging cavity, the valve chamber（9）, the pump housing（1）Provided with one end connection valve chamber, other end connection
The drain path of engine driving system（10）, in pressure limiting valve（9）In the state of opening, pump cover（2）The fluid of oil-discharging cavity can enter
Enter drain path（10）, let out toward in the transmission system of engine.
5. dual-rotor structure lubricating oil pump according to claim 4, it is characterised in that：The pressure limiting valve（9）Including plunger
（91）And spring（92）, the spring（92）One end is located at plunger（91）The interior, other end is fixed on valve chamber bottom, the plunger
（91）By the hydraulic coupling and spring of oil-discharging cavity（92）Elastic force.
6. dual-rotor structure lubricating oil pump according to claim 5, it is characterised in that：The pressure limiting valve（9）Also include regulation
Bolt（93）, cover plate installed in valve chamber bottom（94）And it is slidably mounted on the closure in valve chamber（95）, the spring（92）
One end is located at plunger（91）The interior, other end is fixed on closure（95）On, the regulating bolt（93）Through cover plate（94）And two
Person is threadedly coupled, the regulating bolt（93）End and closure（95）Contact, head end are located at cover plate（94）Outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710704736.0A CN107327688B (en) | 2017-08-17 | 2017-08-17 | Oil pump with double-rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710704736.0A CN107327688B (en) | 2017-08-17 | 2017-08-17 | Oil pump with double-rotor structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107327688A true CN107327688A (en) | 2017-11-07 |
| CN107327688B CN107327688B (en) | 2022-12-06 |
Family
ID=60224086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710704736.0A Active CN107327688B (en) | 2017-08-17 | 2017-08-17 | Oil pump with double-rotor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107327688B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630890A (en) * | 2019-10-11 | 2019-12-31 | 朱席 | Automobile engine oil pump shell |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203309490U (en) * | 2013-05-31 | 2013-11-27 | 滁州市庆福机电制造有限公司 | Eccentric rotor type oil pump |
| CN204592821U (en) * | 2015-03-12 | 2015-08-26 | 四川兆润摩托车制造有限公司 | A kind of engine for motorcycle oil pump |
| CN105240675A (en) * | 2015-11-04 | 2016-01-13 | 湖南机油泵股份有限公司 | Light large-flow oil pump |
| CN206299991U (en) * | 2016-12-20 | 2017-07-04 | 南京腾源机械制造有限公司 | A kind of dystopy double-cycloid rotor lubricating oil pump |
| CN106917949A (en) * | 2015-12-28 | 2017-07-04 | 长城汽车股份有限公司 | Lubricating oil pump and engine assembly |
| KR20170090849A (en) * | 2016-01-29 | 2017-08-08 | 계명대학교 산학협력단 | Gerotor pump with separated dual rotor |
| CN207049583U (en) * | 2017-08-17 | 2018-02-27 | 湖南机油泵股份有限公司 | A kind of dual-rotor structure lubricating oil pump |
-
2017
- 2017-08-17 CN CN201710704736.0A patent/CN107327688B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203309490U (en) * | 2013-05-31 | 2013-11-27 | 滁州市庆福机电制造有限公司 | Eccentric rotor type oil pump |
| CN204592821U (en) * | 2015-03-12 | 2015-08-26 | 四川兆润摩托车制造有限公司 | A kind of engine for motorcycle oil pump |
| CN105240675A (en) * | 2015-11-04 | 2016-01-13 | 湖南机油泵股份有限公司 | Light large-flow oil pump |
| CN106917949A (en) * | 2015-12-28 | 2017-07-04 | 长城汽车股份有限公司 | Lubricating oil pump and engine assembly |
| KR20170090849A (en) * | 2016-01-29 | 2017-08-08 | 계명대학교 산학협력단 | Gerotor pump with separated dual rotor |
| CN206299991U (en) * | 2016-12-20 | 2017-07-04 | 南京腾源机械制造有限公司 | A kind of dystopy double-cycloid rotor lubricating oil pump |
| CN207049583U (en) * | 2017-08-17 | 2018-02-27 | 湖南机油泵股份有限公司 | A kind of dual-rotor structure lubricating oil pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630890A (en) * | 2019-10-11 | 2019-12-31 | 朱席 | Automobile engine oil pump shell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107327688B (en) | 2022-12-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207049583U (en) | A kind of dual-rotor structure lubricating oil pump | |
| CN201218171Y (en) | Unidirectional hydraulic axial variable displacement plunger pump | |
| US9091266B2 (en) | Scroll compressor having a back pressure control valve for opening and closing a communication path in a stationary scroll | |
| CN201502492U (en) | Electro-hydraulic proportional load-sensitive control variable-displacement axial piston pump | |
| CN100595435C (en) | Unidirectional hydraulic axial variable displacement plunger pump | |
| CN107327688A (en) | A kind of dual-rotor structure lubricating oil pump | |
| CN107061972A (en) | A kind of variable displacement impeller pump | |
| CN206319994U (en) | A kind of cycloid hydraulic motor | |
| CN103470789A (en) | Vacuum chamber flap valve of continuous type vacuum film plating line | |
| CN201218116Y (en) | Variable valve timing distribution regulating mechanism | |
| CN114483513A (en) | Single-plunger servo variable pump | |
| CN208431159U (en) | Double acting oil pump | |
| CN203413136U (en) | Vacuum chamber flap valve of continuous vacuum coating line | |
| CN202520557U (en) | Rotary compressor | |
| CN102705242A (en) | Compressor for realizing oil return quantity control of dual-channel back pressure cavity and control method | |
| JP7169516B2 (en) | Gear pump manufacturing method | |
| CN219548941U (en) | VVT phaser with sliding vane on rotor | |
| CN85109203A (en) | Move radially gear pump with variable capacity (motor) | |
| CN209838680U (en) | Tooth transmission scroll compressor | |
| CN204783677U (en) | Rotary compressor and bent axle thereof | |
| CN218717464U (en) | Energy-saving gear pump with quick pressure regulating function | |
| CN114135482B (en) | Cycloidal gear pump without axle center | |
| CN204783676U (en) | Rotary compressor and bent axle thereof | |
| CN114810582B (en) | Shielding type internal engaged cycloidal gear pump | |
| CN107503936A (en) | A kind of two hydraulic gear pumps |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |