CN105370567B - Automatic partial pressure type duplex gear pump - Google Patents
Automatic partial pressure type duplex gear pump Download PDFInfo
- Publication number
- CN105370567B CN105370567B CN201510915211.2A CN201510915211A CN105370567B CN 105370567 B CN105370567 B CN 105370567B CN 201510915211 A CN201510915211 A CN 201510915211A CN 105370567 B CN105370567 B CN 105370567B
- Authority
- CN
- China
- Prior art keywords
- gear pump
- hydraulic fluid
- pump
- fluid port
- stage gear
- 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.)
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Links
- 239000012530 fluid Substances 0.000 claims abstract description 48
- 206010008469 Chest discomfort Diseases 0.000 claims abstract description 9
- 238000009530 blood pressure measurement Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 28
- 239000000295 fuel oil Substances 0.000 description 8
- 239000010761 intermediate fuel oil Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- 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
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
-
- 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
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/02—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for several machines or pumps connected in series or in parallel
-
- 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0088—Lubrication
-
- 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
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention discloses a kind of pressure distribution control duplex gear pump, belong to duplex gear pump；Aim to provide it is a kind of can balanced loads at different levels duplex gear pump.It includes the two-stage gear pump of series connection；Also include by positioned at housing（7‑2）In piston（7‑10）And spring（7‑1）Constitute partial pressure adjusting means（7）；Housing（7‑2）On have the first hydraulic fluid port（7‑3）, the second hydraulic fluid port（7‑5）, the 3rd hydraulic fluid port（7‑7）With the 4th hydraulic fluid port（7‑8）, piston（7‑10）On have two annular grooves；First hydraulic fluid port（7‑3）With the second hydraulic fluid port（7‑5）One-stage gear pump is connected to respectively（2）Arrival end, high pressure chest（7‑6）With the 4th hydraulic fluid port（7‑8）Secondary gear wheel pump is connected to respectively（5）The port of export, low pressure chamber（7‑11）With the 3rd hydraulic fluid port（7‑7）One-stage gear pump is connected to respectively（2）With secondary gear wheel pump（5）Between oil circuit on.The present invention operates steadily, service life is long, is a kind of high speed, high pressure, big flow duplex gear pump.
Description
Technical field
The present invention relates to a kind of duplex gear pump, more particularly to a kind of automatic partial pressure type duplex gear pump.
Background technology
It is well known that duplex gear pump is in series by two-stage gear pump；The features such as with high speed, high pressure, big flow.So
And, due to can not be matched completely between two-stage gear pump, the flow difference that exists between two-stage (two-speed) pump and cause the load of two-stage (two-speed) pump
It is unbalanced, therefore easily cause instantaneous pressure pulse to increase and cause that big primary pump of load to damage, so as to cause whole string
The service life reduction of level pump.In addition, in initial start stage, two-stage gear pump is rotated simultaneously；And now not yet built between two-stage gear pump
Vertical oil pressure relation, therefore the gear of second level pump is dry friction, is easily damaged.
The content of the invention
For drawbacks described above present in prior art, the present invention is intended to provide a kind of can be automatic point of balanced loads at different levels
Pressure type duplex gear pump.
To achieve these goals, the present invention uses following technical scheme：It includes the one-stage gear pump connected and two grades
Gear pump；Also include partial pressure adjusting means, the partial pressure adjusting means be divided into by housing, in the housing high pressure chest and
The piston of low pressure chamber, the spring for holding out against the piston in low pressure chamber are constituted；There are the first hydraulic fluid port, the second hydraulic fluid port, on housing
There are the first annular groove and the second annular groove on three hydraulic fluid ports and the 4th hydraulic fluid port, piston；Wherein, the first hydraulic fluid port and the second hydraulic fluid port pass through oil respectively
Road is connected to the arrival end of one-stage gear pump, and high pressure chest and the 4th hydraulic fluid port are connected to secondary gear pump discharge by oil duct respectively
End, low pressure chamber and the 3rd hydraulic fluid port are connected on the oil circuit between one-stage gear pump and secondary gear wheel pump by oil duct respectively.
Piston is in convex character shape structure, and its top area is 1/2nd of floor space；One-stage gear pump arrival end with going out
Between mouthful end and it is connected to check valve；One and one is respectively connected in the port of export of one-stage gear pump and the port of export of secondary gear wheel pump
The safety valve of level gear pump inlet end connection；Pressure measurement is connected on oil circuit between connection one-stage gear pump and secondary gear wheel pump to connect
Mouthful, it is connected to oil filter in front of the arrival end of one-stage gear pump.
Compared with the prior art, the present invention on the basis of traditional structure by adopting the above-described technical solution, add
Partial pressure adjusting means, the aligned property of pressure ratio of two-stage gear pump is kept by regulating flow；Therefore, it is possible to automatically will be in office
The high-voltage load at fuel pump outlet end is evenly distributed on gear pumps at different levels under one rotating speed, flow, so that the load of each gear pump
Respectively, the life-span approaches；Traditional structure instantaneous pressure pulse because of caused by load imbalance is completely eliminated, oil pump operation is flat
Surely, service life is long.Further, since check valve is added between two-stage gear pump, therefore initial start stage can send fuel oil
Enter the arrival end of second level gear pump, thoroughly avoid second level gear pump situation in dry friction in firm start；And work as
Fuel oil enters after secondary gear wheel pump from one-stage gear pump, and the check valve is closed automatically.
Brief description of the drawings
Fig. 1 is the principle schematic diagram of the present invention；
Fig. 2 is the structural representation of safety valve of the present invention；
Fig. 3 is the structural representation of partial pressure adjusting means of the present invention.
In figure：Oil filter 1, one-stage gear pump 2, safety valve 3, unloading port 3-1, oil inlet 3-2, oilhole 3-3, valve 3-4,
Shutter spring 3-5, valve body 3-6, valve seat 3-7, pressure measurement interface 4, secondary gear wheel pump 5, check valve 6, partial pressure adjusting means 7, spring
7-1, housing 7-2, the first hydraulic fluid port 7-3, the first annular groove 7-4, the second hydraulic fluid port 7-5, high pressure chest 7-6, the 3rd hydraulic fluid port 7-7, the 4th oil
Mouth 7-8, the second annular groove 7-9, piston 7-10, low pressure chamber 7-11.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figures 1 to 3：One-stage gear pump 2（That is booster pump）With secondary gear wheel pump 5（That is high-pressure pump）Series connection；Partial pressure is adjusted
The enclosure interior is divided into high pressure chest 7-6 and low pressure chamber 7-11 piston 7- by housing 7-2, in the housing by regulating device 7
10th, the spring 7-1 for holding out against the piston in low pressure chamber 7-11 is constituted；There are the first hydraulic fluid port 7-3, the second hydraulic fluid port on housing 7-2
There are the first annular groove 7-4 and the second annular groove 7-9 on 7-5, the 3rd hydraulic fluid port 7-7 and the 4th hydraulic fluid port 7-8, piston 7-10.First hydraulic fluid port 7-3
It is connected to the arrival end of one-stage gear pump 2, high pressure chest 7-6 and the 4th hydraulic fluid port 7-8 difference by oil duct respectively with the second hydraulic fluid port 7-5
The port of export of secondary gear wheel pump 5 is connected to by oil duct, low pressure chamber 7-11 and the 3rd hydraulic fluid port 7-7 are connected to one-level by oil duct respectively
On oil circuit between gear pump 2 and secondary gear wheel pump 5.
In order to ensure that two-stage gear pump pressure ratio is consistent（Pressure P3 is equal to pressure P2 in twice of pump i.e. after pump）, piston use
7-10 convex character shape structures, its top area is 1/2nd of floor space.
There is dry friction in starting stage in order to avoid secondary gear wheel pump 5 in startup, in connection one-stage gear pump 2 and two grades
Check valve 6 is connected on oil circuit between gear pump 5, the entrance of the check valve is connected by the arrival end of oil duct and one-stage gear pump 2
It is logical.
Gear pump is caused to damage in order to avoid system pressure is excessive, in the port of export and secondary gear of one-stage gear pump 2
The port of export of wheel pump 5 is respectively connected to a safety valve 3 connected with the arrival end of one-stage gear pump 2.The safety valve is by with oil inlet
3-2 and Liang Ge unloading ports 3-1 valve body 3-6, the valve seat 3-7 being fixedly connected with the valve body, the valve 3-4 in valve body 3-6
And shutter spring 3-5 is constituted, there is oilhole 3-3 on valve 3-4.
In order to ensure system clean, oil filter 1 is connected in front of the arrival end of one-stage gear pump 2；In order to just with monitoring
Pressure measurement interface 4 is connected on the pressure of system, the oil circuit between connection one-stage gear pump 2 and secondary gear wheel pump 5.
Operation principle：
During startup, fuel oil is included between one-stage gear pump 2, two-stage (two-speed) pump and not yet sets up oil pressure before pump；The pressure of fuel oil before pump
P1 enters in the second annular groove 7-9 and keeps balancing with piston spring 7-1；Second hydraulic fluid port 7-5, the 3rd hydraulic fluid port 7-7, the 4th hydraulic fluid port 7-
Mutually disconnected between 8.
When one-stage gear pump 2, the synchronous axial system of secondary gear wheel pump 5；Fuel oil enters from the arrival end of one-stage gear pump 2, same with this
When fuel oil enter the arrival end of secondary gear wheel pump 5 by oil duct top opening one-way valve 6, to avoid the dry friction of secondary gear wheel pump 5.Work as pump
When the pressure P3 of fuel oil is more than the pressure P2 twice of pump intermediate fuel oil afterwards, that safety valve 3 of the port of export of secondary gear wheel pump 5 is connected to
Connect the arrival end pressure release of one-stage gear pump 2；Meanwhile, pressure oil P3 through oil duct enter high pressure chest 7-6 and promote piston 7-10 to
Lower motion, then the first annular groove 7-4 the 3rd hydraulic fluid port 7-7, the 4th hydraulic fluid port 7-8 are connected, pressure oil P3 is through the 4th hydraulic fluid port 7-8, the
Three hydraulic fluid port 7-7 are supplemented to the port of export of one-stage gear pump 2 and reach new balance, so as to realize the supercharging between two-stage gear pump
Distribution ratio is adjusted, and improves the stability of system.
When the pressure P3 of fuel oil after pump is less than the pressure P2 twice of pump intermediate fuel oil, the port of export of one-stage gear pump 2 is connected to
That safety valve 3 connect this grade of gear pump arrival end pressure release；At the same time, pressure oil P2 enters low pressure chamber 7-11 through oil duct
And promote piston 7-10 to move upwards, then the 3rd hydraulic fluid port 7-7 and the 4th hydraulic fluid port 7-8 disconnect, and the first annular groove 7-4 is by the 3rd hydraulic fluid port
7-7, the second hydraulic fluid port 7-5 are connected, and pressure oil P2 is supplemented to the entrance of one-stage gear pump 2 through the 3rd hydraulic fluid port 7-7, the second hydraulic fluid port 7-5
Hold and reach new balance.
Claims (7)
1. a kind of automatic partial pressure type duplex gear pump, includes the one-stage gear pump and secondary gear wheel pump of series connection；It is characterized in that：Also
Including partial pressure adjusting means（7）, the partial pressure adjusting means is by housing（7-2）, in the housing be divided into high pressure chest（7-
6）And low pressure chamber（7-11）Piston（7-10）, positioned at low pressure chamber（7-11）The middle spring for holding out against the piston（7-1）Constitute；Shell
Body（7-2）On have the first hydraulic fluid port（7-3）, the second hydraulic fluid port（7-5）, the 3rd hydraulic fluid port（7-7）With the 4th hydraulic fluid port（7-8）, piston（7-
10）On have the first annular groove（7-4）With the second annular groove（7-9）；Wherein, the first hydraulic fluid port（7-3）With the second hydraulic fluid port（7-5）Pass through respectively
Oil duct is connected to one-stage gear pump（2）Arrival end, high pressure chest（7-6）With the 4th hydraulic fluid port（7-8）It is connected to respectively by oil duct
Secondary gear wheel pump（5）The port of export, low pressure chamber（7-11）With the 3rd hydraulic fluid port（7-7）One-stage gear pump is connected to by oil duct respectively
（2）With secondary gear wheel pump（5）Between oil circuit on.
2. automatic partial pressure type duplex gear pump according to claim 1, it is characterised in that：Piston（7-10）In convex character shape knot
Structure, its top area is 1/2nd of floor space.
3. automatic partial pressure type duplex gear pump according to claim 1 or 2, it is characterised in that：In one-stage gear pump（2）'s
Between arrival end and the port of export and it is connected to check valve（6）.
4. automatic partial pressure type duplex gear pump according to claim 1 or 2, it is characterised in that：In one-stage gear pump（2）'s
The port of export and secondary gear wheel pump（5）The port of export be respectively connected to one and one-stage gear pump（2）The safety valve of arrival end connection
（3）.
5. automatic partial pressure type duplex gear pump according to claim 1 or 2, it is characterised in that：In connection one-stage gear pump
（2）With secondary gear wheel pump（5）Between oil circuit on be connected to pressure measurement interface（4）, in one-stage gear pump（2）Arrival end in front of connect
There is oil filter（1）.
6. automatic partial pressure type duplex gear pump according to claim 3, it is characterised in that：In connection one-stage gear pump（2）
With secondary gear wheel pump（5）Between oil circuit on be connected to pressure measurement interface（4）, in one-stage gear pump（2）Arrival end in front of be connected to
Oil filter（1）.
7. automatic partial pressure type duplex gear pump according to claim 4, it is characterised in that：In connection one-stage gear pump（2）
With secondary gear wheel pump（5）Between oil circuit on be connected to pressure measurement interface（4）, in one-stage gear pump（2）Arrival end in front of be connected to
Oil filter（1）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510915211.2A CN105370567B (en) | 2015-12-14 | 2015-12-14 | Automatic partial pressure type duplex gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510915211.2A CN105370567B (en) | 2015-12-14 | 2015-12-14 | Automatic partial pressure type duplex gear pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105370567A CN105370567A (en) | 2016-03-02 |
| CN105370567B true CN105370567B (en) | 2017-08-29 |
Family
ID=55373083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510915211.2A Active CN105370567B (en) | 2015-12-14 | 2015-12-14 | Automatic partial pressure type duplex gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105370567B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109613A (en) * | 2021-11-05 | 2022-03-01 | 中国航发西安动力控制科技有限公司 | Aeroengine two-stage gear pump load balancing unit |
| CN114718860A (en) * | 2022-03-04 | 2022-07-08 | 浙江凯斯特液压有限公司 | Internal gearing double-linkage booster gear pump |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4502845A (en) * | 1983-03-24 | 1985-03-05 | General Motors Corporation | Multistage gear pump and control valve arrangement |
| CA2022841A1 (en) * | 1989-10-31 | 1991-05-01 | William J. Haley | Dual capacity fluid pump |
| WO2006033207A1 (en) * | 2004-09-22 | 2006-03-30 | Tbk Co., Ltd. | No-load operation system of tadem pump |
| DE102006055845A1 (en) * | 2006-11-27 | 2008-05-29 | Robert Bosch Gmbh | Multi-stage pump arrangement, has three pumps whose pressure sides are connected with common load line for adjusting high volume flow, where two of pumps are parallely connected for adjusting high pressurizing medium volume flow |
| JP4796026B2 (en) * | 2007-02-13 | 2011-10-19 | 株式会社山田製作所 | Pressure control device in oil pump |
| US8128377B2 (en) * | 2007-04-03 | 2012-03-06 | GM Global Technology Operations LLC | Split-pressure dual pump hydraulic fluid supply system for a multi-speed transmission and method |
| CN201599190U (en) * | 2009-12-17 | 2010-10-06 | 青岛乐化科技有限公司 | Gear pump pressure regulator |
| CN203348074U (en) * | 2013-06-21 | 2013-12-18 | 上海大众液压技术有限公司 | Double gear pump unit |
| CN205172936U (en) * | 2015-12-14 | 2016-04-20 | 贵州红林机械有限公司 | Automatic partial -voltage type double gear pump |
-
2015
- 2015-12-14 CN CN201510915211.2A patent/CN105370567B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105370567A (en) | 2016-03-02 |
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