CN106762595B - Load sensitive pump pilot system - Google Patents
Load sensitive pump pilot system Download PDFInfo
- Publication number
- CN106762595B CN106762595B CN201710107738.1A CN201710107738A CN106762595B CN 106762595 B CN106762595 B CN 106762595B CN 201710107738 A CN201710107738 A CN 201710107738A CN 106762595 B CN106762595 B CN 106762595B
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- Prior art keywords
- load sensitive
- sensitive pump
- cut
- pump
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Abstract
The invention discloses a kind of load sensitive pump pilot systems, including fuel tank, the fuel tank is connected to subject load sensitive pump by pipeline, the torque speed sensor and motor for driving subject load sensitive pump output oil liquid are connected on the subject load sensitive pump, the first flowmeter for calculating subject load sensitive pump oil pump capacity is communicated on the subject load sensitive pump, by the first cut-off reversal valve, the first cut-off reversal valve makes to be tested the LS hydraulic fluid port that load sensitive pump output oil liquid is back to subject load sensitive pump after opening for connection in the first flowmeter.By the above-mentioned means, load sensitive pump pilot system of the present invention, it can be under conditions of being tested load sensitive pump LS hydraulic fluid port pressure adjustable section, the dredge oil amount of accurate measurement subject load sensitive pump, and realize the LS responsiveness test of subject load sensitive pump.
Description
Technical field
The present invention relates to hydraulic test fields, more particularly to a kind of load sensitive pump pilot system.
Background technique
Existing load sensitive pump pilot system such as Fig. 2 controls subject load by proportional pressure control valve by external pilot pump
Sensitive pump LS hydraulic fluid port pressure is to realize the subject variable control purpose of load sensitive pump LS hydraulic fluid port pressure.Due to drawing in the program
The oil liquid of external pilot pump is entered, which generates internal leakage after entering the LS valve for being tested load sensitive pump, and Leakage Energy flows into
Subject load sensitive pump flows away from drain tap, so the dredge oil amount tested is equal to the portion pumped by itself dredge oil amount+external pilot
Divide draining.Calculate to obtain efficiency of pump inaccuracy.
It is negative to be introduced subject by another load sensitive pump pilot system such as Fig. 3 for subject pump load sensitivity pump discharge P hydraulic oil
Sensitive pump itself LS hydraulic fluid port is carried, although the dredge oil amount of flowmeter detection is subject load sensitive pump itself dredge oil amount, is existed
The nonadjustable disadvantage of LS hydraulic fluid port pressure.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of load sensitive pump pilot systems, can be quick in subject load
Under conditions of sense pump LS hydraulic fluid port pressure adjustable section, the dredge oil amount of accurate measurement subject load sensitive pump, and realize that subject load is quick
The LS responsiveness test of sense pump.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of load-sensitive pump testing is provided
System, including fuel tank, the fuel tank are connected to subject load sensitive pump by pipeline, connect on the subject load sensitive pump useful
It is communicated on the torque speed sensor and motor of driving subject load sensitive pump output oil liquid, the subject load sensitive pump
For calculating the first flowmeter of subject load sensitive pump oil pump capacity, the first cut-off commutation is communicated in the first flowmeter
Valve, the first cut-off reversal valve make to be tested the LS oil that load sensitive pump output oil liquid is back to subject load sensitive pump after opening
Mouthful.
In a preferred embodiment of the present invention, proportional pressure control valve, the ratio are parallel on the first cut-off reversal valve
Example overflow valve carries out electric proportional control load to pump.
In a preferred embodiment of the present invention, first cut-off reversal valve lower end has been sequentially communicated the second cut-off commutation
Valve and operated proportional flow control valve, the other end of the operated proportional flow control valve are connected to fuel tank, and the operated proportional flow control valve is opened
Degree is tested the LS hydraulic fluid port pressure of load sensitive pump to adjust.
In a preferred embodiment of the present invention, the first cut-off reversal valve, the second cut-off reversal valve and subject load
Third cut-off reversal valve is communicated between the LS hydraulic fluid port of sensitive pump, the other end of third cut-off reversal valve is connected to fuel tank, described
First cut-off reversal valve is opened, and the second cut-off reversal valve is closed, and the switch of control third cut-off reversal valve is to subject load-sensitive
The LS hydraulic fluid port of pump carries out responsiveness test.
In a preferred embodiment of the present invention, described proportional pressure control valve one end is connected in parallel on the first shut-off valve, the other end
It is connected in parallel on operated proportional flow control valve.
In a preferred embodiment of the present invention, it is successively linked between subject load sensitive pump and the first flowmeter
Check valve and filter.
In a preferred embodiment of the present invention, gate valve is equipped between the fuel tank and subject load sensitive pump.
In a preferred embodiment of the present invention, the is connected between the S hydraulic fluid port and fuel tank of the subject load sensitive pump
Two flowmeters.
In a preferred embodiment of the present invention, it is connected between the second cut-off reversal valve and fuel tank for cooling logical
The cooler of oil liquid after crossing proportional pressure control valve load.
The beneficial effects of the present invention are: load sensitive pump pilot system of the present invention, it can be in subject load sensitive pump LS oil
Under conditions of mouth pressure adjustable section, the dredge oil amount of accurate measurement subject load sensitive pump, and realize the LS of subject load sensitive pump
Responsiveness test.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, in which:
Fig. 1 is the structural schematic diagram of one preferred embodiment of load sensitive pump pilot system of the present invention；
Fig. 2 is the structural schematic diagram of existing load sensitive pump pilot system；
Fig. 3 is the structural schematic diagram of existing another load sensitive pump pilot system；
The components in the drawings are labeled as follows: 1, gate valve, 2, subject load sensitive pump, 3, sensor, 4, motor, and 5, unidirectional
Valve, 6, filter, 7, first flowmeter, the 8, first cut-off reversal valve, the 9, second cut-off reversal valve, 10, operated proportional flow control valve,
11, proportional pressure control valve, 12, third cut-off reversal valve, 13, cooler, 14, second flowmeter, 15, runner.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Referring to Fig. 1, a kind of load sensitive pump pilot system, including fuel tank 15, pass through pipeline connection subject on fuel tank 15
Load sensitive pump 2 is tested the sensor being connected on load sensitive pump 2 for driving subject load sensitive pump 2 to export oil liquid
3 and motor 4, the revolving speed and torque of the detection subject load sensitive pump 2 of sensor 3 are tested on load sensitive pump 2 and are communicated with based on
The first flowmeter 7 of subject 2 oil pump capacity of load sensitive pump is calculated, the first cut-off of connection oil reversal valve 8 in first flowmeter 7, first
Cut-off reversal valve 8 makes to be tested the LS hydraulic fluid port that the output oil liquid of load sensitive pump 2 is back to subject load sensitive pump 2 after opening.
In addition, being parallel with proportional pressure control valve 11 on the first cut-off reversal valve 8,11 pairs of pumps of proportional pressure control valve carry out electric ratio control
System load.
In addition, the first cut-off 8 lower end of reversal valve has been sequentially communicated the second cut-off reversal valve 9 and operated proportional flow control valve 10,
The other end of operated proportional flow control valve 10 is connected to fuel tank 15, and 10 aperture of operated proportional flow control valve is to adjust subject load sensitive pump
2 LS hydraulic fluid port pressure.
It is connected between reversal valve 9 and the LS hydraulic fluid port for being tested load sensitive pump 1 in addition, the first cut-off reversal valve 8, second ends
There is third to end reversal valve 12, the other end of third cut-off reversal valve 12 is connected to fuel tank 15, and the first cut-off reversal valve 8 is opened,
Second cut-off reversal valve 9 is closed, and the switch of control third cut-off reversal valve 12 rings the LS hydraulic fluid port of subject load sensitive pump
Answering property is tested.
In addition, 11 one end of proportional pressure control valve is connected in parallel on the first shut-off valve 8, the other end is connected in parallel on operated proportional flow control valve 10
On.
In addition, being successively linked with check valve 5 and filter 6 between subject load sensitive pump 1 and first flowmeter 7.
In addition, being equipped with gate valve 1 between fuel tank 15 and subject load sensitive pump 2.
In addition, being connected with second flowmeter 14, second flowmeter between the S hydraulic fluid port and fuel tank 15 of subject load sensitive pump 2
14 for detecting the draining flow of subject load sensitive pump, to calculate the volumetric efficiency of subject load sensitive pump.
In addition, being connected between the second cut-off reversal valve 9 and fuel tank 15 for after the cooling load by proportional pressure control valve 11
Oil liquid cooler 13.
The specific working principle is as follows for load sensitive pump pilot system of the present invention: the driving subject load sensitive pump 2 of variable-frequency motor 4
Oil liquid is exported through check valve 5 after the filtering of filter 6, subject 2 output stream of load sensitive pump is detected by first flowmeter 7
Amount, is loaded by proportional pressure control valve 11, is realized by command signal to pump electric proportional control load.It is tested load sensitive pump 2
The high pressure oil of output can enter the LS hydraulic fluid port of subject load sensitive pump 2 after opening by bypass the first cut-off reversal valve 8, realize LS
Hydraulic fluid port control oil is introduced by subject load sensitive pump itself.The second cut-off reversal valve 9 is opened, operated proportional flow control valve 10 is adjusted
Aperture solves subject 2 draining of load sensitive pump to realize the function of the LS hydraulic fluid port pressure adjustable of subject load sensitive pump 2
Flow inaccuracy and nonadjustable two problems of LS hydraulic fluid port pressure.The first cut-off reversal valve 8 is opened, the second cut-off reversal valve is closed
9, the switch of reversal valve 12 is ended by control third, it can be achieved that the LS responsiveness of subject load sensitive pump 2 is tested.
It is different from the prior art, load sensitive pump pilot system of the present invention, it can be in subject load sensitive pump LS hydraulic fluid port pressure
Under the conditions of power is adjustable, the dredge oil amount of accurate measurement subject load sensitive pump, and realize the LS response of subject load sensitive pump
Property test.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (9)
1. a kind of load sensitive pump pilot system, which is characterized in that including fuel tank, the fuel tank is connected to subject load by pipeline
Sensitive pump, it is described to be tested the torque revolution speed sensing being connected on load sensitive pump for driving subject load sensitive pump output oil liquid
Device and motor, it is described to be tested the first flowmeter being communicated on load sensitive pump for calculating subject load sensitive pump oil pump capacity,
The first cut-off reversal valve is communicated in the first flowmeter, the first cut-off reversal valve makes to be tested load sensitive pump after opening
Output oil liquid is back to the LS hydraulic fluid port of subject load sensitive pump.
2. load sensitive pump pilot system according to claim 1, which is characterized in that on the first cut-off reversal valve simultaneously
It is associated with proportional pressure control valve, the proportional pressure control valve carries out electric proportional control load to subject load sensitive pump.
3. load sensitive pump pilot system according to claim 2, which is characterized in that first cut-off reversal valve lower end
It is sequentially communicated the second cut-off reversal valve and operated proportional flow control valve, the other end of the operated proportional flow control valve is connected to oil
Case, the operated proportional flow control valve aperture are tested the LS hydraulic fluid port pressure of load sensitive pump to adjust.
4. load sensitive pump pilot system according to claim 3, which is characterized in that the first cut-off reversal valve, the
Third cut-off reversal valve is communicated between two cut-off reversal valves and the LS hydraulic fluid port for being tested load sensitive pump, third ends reversal valve
The other end is connected to fuel tank, and the first cut-off reversal valve is opened, and the second cut-off reversal valve is closed, and control third ends reversal valve
Switch to subject load sensitive pump LS hydraulic fluid port carry out responsiveness test.
5. load sensitive pump pilot system according to claim 4, which is characterized in that described proportional pressure control valve one end is in parallel
On the first shut-off valve, the other end is connected in parallel on operated proportional flow control valve.
6. -5 any load sensitive pump pilot system according to claim 1, which is characterized in that the subject load-sensitive
Check valve and filter are successively linked between pump and first flowmeter.
7. load sensitive pump pilot system according to claim 6, which is characterized in that the fuel tank and subject load-sensitive
Gate valve is equipped between pump.
8. load sensitive pump pilot system according to claim 7, which is characterized in that the S of the subject load sensitive pump
Second flowmeter is connected between hydraulic fluid port and fuel tank.
9. load sensitive pump pilot system according to claim 3, which is characterized in that the second cut-off reversal valve and oil
The cooler for the oil liquid after the cooling load by proportional pressure control valve is connected between case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710107738.1A CN106762595B (en) | 2017-02-27 | 2017-02-27 | Load sensitive pump pilot system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710107738.1A CN106762595B (en) | 2017-02-27 | 2017-02-27 | Load sensitive pump pilot system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106762595A CN106762595A (en) | 2017-05-31 |
| CN106762595B true CN106762595B (en) | 2019-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710107738.1A Active CN106762595B (en) | 2017-02-27 | 2017-02-27 | Load sensitive pump pilot system |
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| CN (1) | CN106762595B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760321B (en) * | 2018-05-23 | 2024-01-02 | 杭州良丰动力设备有限公司 | Engine power loading test system |
| CN109185275B (en) * | 2018-10-26 | 2024-01-09 | 华南理工大学 | Load-sensing constant-pressure variable pump test device, use method and detection method thereof |
| CN114321108B (en) * | 2021-12-29 | 2023-06-13 | 湖南三一中型起重机械有限公司 | Electrohydraulic composite control system and method and working machine |
| CN115059606B (en) * | 2022-06-21 | 2023-03-07 | 重庆大学 | Load-sensitive pump control loop simulation test system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738396A (en) * | 2013-12-27 | 2014-04-23 | 三一汽车起重机械有限公司 | Constant flow steering system and engineering machinery |
| CN105221506A (en) * | 2015-09-18 | 2016-01-06 | 徐州工业职业技术学院 | A kind of load-sensitive valve and load-sensitive hydraulic system |
| CN206917836U (en) * | 2017-02-27 | 2018-01-23 | 江苏恒立液压科技有限公司 | Load sensitive pump pilot system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3694355B2 (en) * | 1996-02-09 | 2005-09-14 | 日立建機株式会社 | Hydraulic drive unit with load sensing control |
| JP2012122590A (en) * | 2010-12-10 | 2012-06-28 | Daikin Industries Ltd | Hydraulic unit |
-
2017
- 2017-02-27 CN CN201710107738.1A patent/CN106762595B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738396A (en) * | 2013-12-27 | 2014-04-23 | 三一汽车起重机械有限公司 | Constant flow steering system and engineering machinery |
| CN105221506A (en) * | 2015-09-18 | 2016-01-06 | 徐州工业职业技术学院 | A kind of load-sensitive valve and load-sensitive hydraulic system |
| CN206917836U (en) * | 2017-02-27 | 2018-01-23 | 江苏恒立液压科技有限公司 | Load sensitive pump pilot system |
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| Publication number | Publication date |
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| CN106762595A (en) | 2017-05-31 |
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