CN103696998B - Hydrostatic transmission detection platform load system - Google Patents
Hydrostatic transmission detection platform load system Download PDFInfo
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- CN103696998B CN103696998B CN201310732441.6A CN201310732441A CN103696998B CN 103696998 B CN103696998 B CN 103696998B CN 201310732441 A CN201310732441 A CN 201310732441A CN 103696998 B CN103696998 B CN 103696998B
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Abstract
The invention discloses a kind of hydrostatic transmission detection platform load system, its structure is mainly: the loop A connected by two one-way valves and loop B composes in parallel load pump feed circuit, fuel tank, one-way hydraulic pump, load pump feed circuit is composed in series a closed-loop path, the two ends of load pump are connected with the neutral position of loop A and loop B respectively, in order to protect whole piece loop, a pilot operated compound relief valve in parallel before load pump feed circuit, in order to the working pressure of the oil pressure and load pump that regulate whole piece loop, a series connection electricity-liquid guide proportion relief valve after load pump feed circuit.Advantage of the present invention is: one-way hydraulic pump need not be stopped and just directly can realize the clockwise and anticlockwise of load pump, and solenoid valve is quick on the draw, and consumes few.
Description
Technical field
The present invention relates to a kind of load system, particularly relate to a kind of load system used in hydrostatic transmission detection platform.
Background technique
In People's Republic of China's machinery industry standard, requirement is all done to the basic parameter of hydrostatic transmission, technical requirements, test method, inspection rule, mark and packaging, wherein all needed to measure input speed, input torque, output speed, Driving Torque and unloaded output speed during test.Standard has made regulation to experimental facilities for this reason, and the input end of hydrostatic transmission to be checked is driven by motor, and between motor and the input end of hydrostatic transmission, once mounting has rotational speed meters and torque meter, measures input speed and input torque; Be connected with deceleration loading device at the output terminal of hydrostatic transmission to be checked, rotational speed meters and torque meter are installed between output terminal and deceleration loading device, measure output speed and Driving Torque with this.
On signal detecting platform before, load is also provided by oil hydraulic pump usually, but in load system, valve rod stretches out by internally piloted valve usually, by electronic, pneumatic, that hydraulic actuator controls spool rotation or movement, and long-term action, valve stem seal performance reduces, and internal and outernal leakage becomes a difficult problem to be solved; And complex structure, manufacture cost is higher, slow in one's movements, and energy consumption is larger.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of compact structure, can realizes the hydrostatic transmission detection platform load system of load pump bidirectional rotation.
For solving the problems of the technologies described above, the technological scheme that hydrostatic transmission detection platform load system of the present invention is taked is as follows:
A kind of hydrostatic transmission detection platform load system, its innovative point is: comprise fuel tank, one-way hydraulic pump, load pump, load pump feed circuit;
Described load pump feed circuit structure is: the one-way valve a that installation direction is identical and one-way valve b is composed in series loop A, the one-way valve c that installation direction is identical and one-way valve d is composed in series loop B, described loop A and loop B is in parallel, and the filler opening in two loops is connected, and oil outlet is connected; Described load pump feed circuit is connected on fuel tank and one-way hydraulic pumps between hydraulic fluid port;
Described load pump is bidirectional hydraulic pump, and one end is connected with loop A, and connection part is between one-way valve a and one-way valve b; The other end is connected with loop B, and connection part is between one-way valve c and one-way valve d;
Described one-way hydraulic pump is driven by motor by coupling; In fuel tank, be provided with oil absorption filter, described oil absorption filter is connected with one-way hydraulic pump, and is provided with stop valve between fuel tank and one-way hydraulic pump.
On this basis, between the oil outlet of described load pump feed circuit and fuel tank, electricity-liquid guide proportion relief valve is installed.
On this basis, in described hydrostatic transmission detection platform load system, a pilot operated compound relief valve is installed, the filler opening of described pilot operated compound relief valve is connected to load pump feed circuit and one-way hydraulic and pumps on the oil circuit that hydraulic fluid port is connected, and oil outlet is communicated with fuel tank.
On this basis, a high pressure filter is also installed after the oil outlet of described one-way hydraulic pump, before the rear fuel tank of electricity-liquid guide proportion relief valve oil outlet, return filter is installed, on fuel tank, air filter is installed simultaneously.
On this basis, a heater and a temperature transducer are installed in described fuel tank, before return filter, cooler are installed simultaneously.
On this basis, described hydrostatic transmission detection platform load system was provided with flow monitoring system before the aftercooler of electricity-liquid guide proportion relief valve oil outlet, described flow monitoring system structure is: flowmeter is in parallel with two-position two-way solenoid valve, and two-position two-way solenoid valve is normally open, oil outlet is towards fuel tank.
Beneficial effect of the present invention: advantage of the present invention has: 1, use equipment just can realize the Double-directional rotary of load pump, and one-way hydraulic pump need not be stopped and just can realize; 2, install electricity-liquid guide proportion relief valve in systems in which, can regulate the working pressure of load pump, and be quick on the draw, influence factor is few; 3, in oil circuit, install a pilot operated compound relief valve, can protect this system, make when load pump stops operating, hydraulic oil also can flow back to fuel tank smoothly; Also be provided with a high pressure filter after the oil outlet of 4, one-way hydraulic pump, protection one-way hydraulic pump downstream components is not contaminated, installs back oil strainer, can reduce the contaminated degree of fluid in fuel tank; 5, a heater and a temperature transducer are installed in fuel tank, can ensure that hydraulic oil is in the most applicable temperature work, and before return filter, cooler is installed, hydraulic oil can fully be cooled when getting back to fuel tank; 6, flow monitoring system is installed, can this loading system of Real-Time Monitoring whether normally operates.
Accompanying drawing explanation
As shown be the oil circuit figure of hydrostatic transmission detection platform load system of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
Hydrostatic transmission detection platform load system of the present invention forms primarily of with lower component: fuel tank 1, one-way hydraulic pump 2, load pump 3, load pump feed circuit 4.
As shown in the figure, load pump feed circuit 4 is formed by loop A4-1 and loop B4-2 parallel combination, loop A4-1 is in series by one-way valve a5 and one-way valve b6, the installation direction of two one-way valves is identical, loop B4-2 is in series by one-way valve c7 and one-way valve d8, the installation direction of two one-way valves is identical, and loop A4-1 and loop B4-2 needs the filler opening in two loops to be connected when parallel connection, and oil outlet is connected.
Fuel tank 1, one-way hydraulic pump 2, load pump feed circuit 4 are composed in series a loop successively, and the inlet port of one-way hydraulic pump 2 is connected with fuel tank 1, and oil outlet is connected with the filler opening of load pump feed circuit 4.Load pump feed circuit 4 is also provided with a load pump 3, and one end of this load pump 3 and the oil circuit between one-way valve a5 with one-way valve b6 are connected, and the other end and the oil circuit between one-way valve c7 with one-way valve d8 are connected.In order to adapt to the clockwise and anticlockwise of detection platform, this load pump 3 selects bidirectional hydraulic pump.
One-way hydraulic pump 2 is driven by motor 10 by coupling 9, and in order to adapt to the startup characteristic frequently of this load system, elastic coupling flexible coupling selected by coupling 9 of the present invention.
An oil absorption filter 11 is installed in fuel tank 1, and a stop valve 12 is installed between fuel tank 1 and one-way hydraulic pump 2, protect one-way hydraulic pump 2 not by the erosion of hydraulic oil by these modes.In order to ensure not pollute downstream components from one-way hydraulic pump 2 hydraulic oil out, at the oil outlet place of one-way hydraulic pump 2, a high pressure filter 13 is installed.
In order to the hydraulic oil pollution that the hydraulic oil reduced in fuel tank 1 is refluxed, between load pump feed circuit 4 and fuel tank 1, return filter 14 is also installed, filters out the impurity in oil return with this; Except the hydraulic oil refluxed can pollute the hydraulic oil in fuel tank 1, air also can pollute hydraulic oil, so be also provided with air filter 15 on fuel tank 1, avoids pollutant to enter contaminated liquid force feed in fuel tank 1 with air.
After the oil outlet of one-way hydraulic pump 2, be also installed in parallel a relief valve 16 before load pump feed circuit 4, the filler opening of relief valve 16 is connected on the oil circuit between load pump feed circuit 4 and one-way hydraulic pump 2, and oil outlet is communicated with fuel tank 1.Because flow is large in this hydrostatic transmission detection platform load system, pressure is high, so select pilot operated compound relief valve.Just because of installed this relief valve 16, can draining when oil pressure is higher in oil circuit, play the effect of protection oil circuit.
When doing hydrostatic transmission detection experiment, needing to load different loads, therefore also needing a regulator to be installed in oil circuit to regulate the oil pressure at load pump 3 two ends.In order to address this problem, the measure taked in the present invention is: after load pump feed circuit 4, be provided with an electricity-liquid guide proportion relief valve 17 before return filter 14, this valve filler opening is connected with the outlet line of load pump feed circuit 4, and oil outlet return filter 14 is connected.By changing the size of electrical current, adjustment pressure when regulating unlatching electricity-liquid guide proportion relief valve 17 to open, thus realize the maximum service pressure of load pump 3.
Hydraulic oil operationally has oneself optimum working temperature, in order to reach the optimum working temperature of hydraulic oil, in fuel tank 1, also fill a heater 18 and a temperature transducer 19, regulated at any time by the temperature detecting hydraulic oil at any time, made hydraulic oil keep a steady temperature.Meanwhile, when hydraulic oil flows in oil circuit, due to a variety of causes, temperature can rise, so oil temperature reduced through supercooler 20 before hydraulic oil flows back to fuel tank 1.
In order to understand the discharge capacity of load pump 3, also a flow monitoring system 21 is installed in this oil circuit, this flow monitoring system 21 is formed in parallel by flowmeter 21-1 and two-position two-way solenoid valve 21-2, after being arranged on the oil outlet of electricity-liquid guide proportion relief valve 17, before cooler 20, and the oil outlet of two-position two-way solenoid valve 21-2 is towards fuel tank, it is normally open.
Working principle: stop valve 12 is opened, starting electrical machinery 10, motor 10 drives one-way hydraulic pump 2 by coupling 9, hydraulic oil is extracted out from fuel tank 1, after high pressure filter 13, flowing to load pump feed circuit 4, have two flow directions in load pump feed circuit 4, one is that hydraulic oil flows to load pump 3 through one-way valve a5, flow to electricity-liquid guide proportion relief valve 17 through one-way valve d8 again, flow back to fuel tank; Another is that hydraulic oil flows to load pump 3 through one-way valve c7, then flows to electricity-liquid guide proportion relief valve 17 through one-way valve b6, flows back to fuel tank.If load pump 3 stops operating, one-way hydraulic pump 2 again when being ceaselessly pressed into hydraulic oil in oil circuit, and when hydraulic fluid pressure is even as big as opening relief valve 16, relief valve 16 is opened, and hydraulic oil directly flows back to fuel tank, protects oil circuit.Two-position two-way solenoid valve 21-2 is normally open, when detecting hydraulic fluid flow rate, by the solenoid valves of two-position two-way solenoid valve 21-2, the loop that two-position two-way solenoid valve 21-2 is housed is disconnected, make hydraulic oil through flowmeter 21-1, can hydraulic fluid flow rate be known by the data of reading flow gauge 21-1.
Claims (2)
1. a hydrostatic transmission detection platform load system, comprises fuel tank, one-way hydraulic pump, load pump, load pump feed circuit;
Described load pump feed circuit structure is: the one-way valve a that installation direction is identical and one-way valve b is composed in series loop A, the one-way valve c that installation direction is identical and one-way valve d is composed in series loop B, described loop A and loop B is in parallel, and the filler opening in two loops is connected, and oil outlet is connected; Described load pump feed circuit is connected on fuel tank and one-way hydraulic pumps between hydraulic fluid port;
Described load pump is bidirectional hydraulic pump, and one end is connected with loop A, and connection part is between one-way valve a and one-way valve b; The other end is connected with loop B, and connection part is between one-way valve c and one-way valve d;
Described one-way hydraulic pump is driven by motor by coupling;
It is characterized in that:
Electricity-liquid guide proportion relief valve is installed between the oil outlet of described load pump feed circuit and fuel tank;
In fuel tank, be provided with oil absorption filter, described oil absorption filter is connected with one-way hydraulic pump, and is provided with stop valve between fuel tank and one-way hydraulic pump; A heater and a temperature transducer are installed in described fuel tank;
A high pressure filter is also installed after the oil outlet of described one-way hydraulic pump, on fuel tank, air filter is installed simultaneously; Before the rear fuel tank of electricity-liquid guide proportion relief valve oil outlet, return filter is installed, before return filter, cooler is installed;
Before the aftercooler of electricity-liquid guide proportion relief valve oil outlet, be provided with flow monitoring system, described flow monitoring system structure is: flowmeter is in parallel with two-position two-way solenoid valve, and two-position two-way solenoid valve is normally open, and oil outlet is towards fuel tank.
2. hydrostatic transmission detection platform load system according to claim 1, it is characterized in that: in described hydrostatic transmission detection platform load system, a pilot operated compound relief valve is installed, the filler opening of described pilot operated compound relief valve is connected to load pump feed circuit and one-way hydraulic and pumps on the oil circuit that hydraulic fluid port is connected, and oil outlet is communicated with fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310732441.6A CN103696998B (en) | 2013-12-27 | 2013-12-27 | Hydrostatic transmission detection platform load system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310732441.6A CN103696998B (en) | 2013-12-27 | 2013-12-27 | Hydrostatic transmission detection platform load system |
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| Publication Number | Publication Date |
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| CN103696998A CN103696998A (en) | 2014-04-02 |
| CN103696998B true CN103696998B (en) | 2015-12-02 |
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| CN201310732441.6A Active CN103696998B (en) | 2013-12-27 | 2013-12-27 | Hydrostatic transmission detection platform load system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111536100B (en) * | 2020-04-30 | 2022-09-06 | 肇庆学院 | Temperature control system and temperature control method for high-acceleration test bed of hydraulic element |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3864915A (en) * | 1972-07-28 | 1975-02-11 | Richier Sa | Hydraulic system for displacing a load with automatic hydrostatic balancing |
| CN101881289A (en) * | 2010-07-07 | 2010-11-10 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Hydraulic cylinder reliability test method and device based on power recovery technology |
| CN202900838U (en) * | 2012-10-30 | 2013-04-24 | 杭州海聚动力科技有限公司 | Bi-directional closed type loading return circuit system in test platform of hydraulic motor |
| CN203730422U (en) * | 2013-12-27 | 2014-07-23 | 南通爱慕希机械有限公司 | load system for detecting platform of hydrostatic drive device |
-
2013
- 2013-12-27 CN CN201310732441.6A patent/CN103696998B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3864915A (en) * | 1972-07-28 | 1975-02-11 | Richier Sa | Hydraulic system for displacing a load with automatic hydrostatic balancing |
| CN101881289A (en) * | 2010-07-07 | 2010-11-10 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Hydraulic cylinder reliability test method and device based on power recovery technology |
| CN202900838U (en) * | 2012-10-30 | 2013-04-24 | 杭州海聚动力科技有限公司 | Bi-directional closed type loading return circuit system in test platform of hydraulic motor |
| CN203730422U (en) * | 2013-12-27 | 2014-07-23 | 南通爱慕希机械有限公司 | load system for detecting platform of hydrostatic drive device |
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| CN103696998A (en) | 2014-04-02 |
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Address after: 226010, 1, 19 East Road, Nantong economic and Technological Development Zone, Jiangsu Patentee after: NANTONG AMC MACHINERY CO., LTD. Address before: 226000 No. 19 East New Road, Nantong economic and Technological Development Zone, Jiangsu Patentee before: Nantong Aimuxi Machinery Co., Ltd. |