CN103696998A - Load system of hydrostatic transmission device detecting platform - Google Patents
Load system of hydrostatic transmission device detecting platform Download PDFInfo
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- CN103696998A CN103696998A CN201310732441.6A CN201310732441A CN103696998A CN 103696998 A CN103696998 A CN 103696998A CN 201310732441 A CN201310732441 A CN 201310732441A CN 103696998 A CN103696998 A CN 103696998A
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Abstract
The invention discloses a load system of a hydrostatic transmission device detecting platform. The load system is structurally characterized in that a circuit A and a circuit B are connected in parallel to form a loading pump feed circuit, each of the circuit A and the circuit B is formed by series connection of two one-way valves, an oil tank, a one-way hydraulic pump and the loading pump feed circuit are serially connected to form a closed circuit, and two ends of a loading pump are communicated with middle positions of the circuit A and the circuit B respectively. In order to protect the whole circuit, a pilot-operated relief valve is connected in parallel in front of the loading pump feed circuit; in order to regulate oil pressure of the whole circuit and working pressure of the loading pump, an electro-hydraulic pilot-operated proportional relief valve is serially connected behind the loading pump feed circuit. The load system has the advantages that the loading pump can rotate forwards and backwards directly without stopping the one-way hydraulic pump, and a solenoid valve is sensitive in response and less in consumption.
Description
Technical field
The present invention relates to a kind of load system, relate in particular to a kind of load system using in hydrostatic transmission detection platform.
Background technique
In People's Republic of China's machinery industry standard, the basic parameter of hydrostatic transmission, technical requirements, test method, inspection rule, sign and packing have all been done to requirement, while wherein testing, all needed to measure input speed, input torque, output speed, output torque and unloaded output speed.Standard has been 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; Output terminal at hydrostatic transmission to be checked is connected with deceleration loading device, and rotational speed meters and torque meter are installed between output terminal and deceleration loading device, with this, measures output speed and output torque.
On signal detecting platform before, load is also to be provided by oil hydraulic pump conventionally, but in load system, internally piloted valve stretches out valve rod conventionally, by rotation or movement electronic, pneumatic, that hydraulic actuator is controlled spool, 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 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: one-way valve a and one-way valve b that installation direction is identical are composed in series loop A, one-way valve c and one-way valve d that installation direction is identical are composed in series loop B, described loop A and loop B are 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; Oil absorption filter is installed in fuel tank, and described oil absorption filter is connected with one-way hydraulic pump, and between fuel tank and one-way hydraulic pump, stop valve is installed.
On this basis, electricity-liquid guide proportion relief valve is installed between the oil outlet of described load pump feed circuit and fuel tank.
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, after electricity-liquid guide proportion relief valve oil outlet, before fuel tank, return filter is installed, air filter is installed simultaneously on fuel tank.
On this basis, a heater and a temperature transducer are installed in described fuel tank, cooler was installed simultaneously before return filter.
On this basis, described hydrostatic transmission detection platform load system is provided with flow monitoring system before cooler after 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, and oil outlet is towards fuel tank.
Beneficial effect of the present invention: advantage of the present invention has: 1, use an 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, electricity-liquid guide proportion relief valve is installed in system, can be regulated the working pressure of load pump, and be quick on the draw, influence factor is few; 3, a pilot operated compound relief valve is installed in oil circuit, can be protected this system, make when load pump stops operating, hydraulic oil also can flow back to fuel tank smoothly; 4, a high pressure filter is also installed after the oil outlet of 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 guarantee that hydraulic oil is in the most applicable temperature work, and cooler was installed before return filter, make the hydraulic oil can be fully cooling when getting back to fuel tank; 6, flow monitoring system is installed, can this loading system of Real-Time Monitoring whether is normally turned round.
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 is mainly by forming with lower member: 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 need to be connected the filler opening in two loops 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.A load pump 3 is also installed in load pump feed circuit 4, and one end of this load pump 3 and one-way valve a5 are connected with the oil circuit between one-way valve b6, and the other end and one-way valve c7 are connected with the oil circuit between one-way valve d8.In order to adapt to the clockwise and anticlockwise of detection platform, this load pump 3 is selected bidirectional hydraulic pump.
One-way hydraulic pump 2 is driven by motor 10 by coupling 9, and for the startup that adapts to this load system characteristic frequently, coupling 9 of the present invention is selected elastic coupling flexible couplings.
An oil absorption filter 11 is installed in fuel tank 1, and between fuel tank 1 and one-way hydraulic pump 2, a stop valve 12 is installed, by these modes, protect one-way hydraulic pump 2 not to be subject to the erosion of hydraulic oil.In order to guarantee 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.
Hydraulic oil pollution for the hydraulic oil reducing in fuel tank 1 is refluxed is also provided with return filter 14 between load pump feed circuit 4 and fuel tank 1, with this, filters out the impurity in oil return; Except the hydraulic oil refluxing can pollute the hydraulic oil in fuel tank 1, air also can pollute hydraulic oil, so air filter 15 is also installed 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, before load pump feed circuit 4, be also installed in parallel a relief valve 16, 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.In this hydrostatic transmission detection platform load system, because flow is large, pressure is high, so select pilot operated compound relief valve.Just because of this relief valve 16 has been installed, draining in the time of can oil pressure is higher in oil circuit, plays the effect of protection oil circuit.
When doing hydrostatic transmission detection test, need to load different loads, therefore also the oil pressure that a regulator regulates load pump 3 two ends need to be installed in oil circuit.In order to address this problem, the measure of taking is in the present invention: after load pump feed circuit 4, before return filter 14, electricity-liquid guide proportion relief valve 17 is installed, this valve filler opening is connected with the fuel-displaced pipeline of load pump feed circuit 4, and oil outlet return filter 14 is connected.By changing the size of electrical current, the adjusting pressure while regulating unlatching electricity-liquid guide proportion relief valve 17 to open, thus realize the maximum service pressure of load pump 3.
Hydraulic oil has the optimum working temperature of oneself when work, in order to reach the optimum working temperature of hydraulic oil, in fuel tank 1, also filled a heater 18 and a temperature transducer 19, by detecting at any time the temperature of hydraulic oil, regulated 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 was reduced through supercooler 20 before hydraulic oil flows back to fuel tank 1.
In order to understand the discharge capacity of load pump 3, a flow monitoring system 21 has also been 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, 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, flowing to load pump feed circuit 4 through after high pressure filter 13, in load pump feed circuit 4, there are two flow directions, one is that hydraulic oil flows to load pump 3 through one-way valve a5, through one-way valve d8, flow to electricity-liquid guide proportion relief valve 17 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 is again ceaselessly when being pressed into hydraulic oil in oil circuit, and when hydraulic fluid pressure is when opening relief valve 16, relief valve 16 is opened, and hydraulic oil directly flows back to fuel tank, has protected oil circuit.Two-position two-way solenoid valve 21-2 is normally open, while detecting hydraulic fluid flow rate, by the solenoid valve energising 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, by reading the data of flowmeter 21-1, can know hydraulic fluid flow rate.
Claims (6)
1. a hydrostatic transmission detection platform load system, is characterized in that: comprise fuel tank, one-way hydraulic pump, load pump, load pump feed circuit;
Described load pump feed circuit structure is: one-way valve a and one-way valve b that installation direction is identical are composed in series loop A, one-way valve c and one-way valve d that installation direction is identical are composed in series loop B, described loop A and loop B are 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; Oil absorption filter is installed in fuel tank, and described oil absorption filter is connected with one-way hydraulic pump, and between fuel tank and one-way hydraulic pump, stop valve is installed.
2. hydrostatic transmission detection platform load system according to claim 1, 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.
3. hydrostatic transmission detection platform load system according to claim 2, 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.
4. hydrostatic transmission detection platform load system according to claim 3, it is characterized in that: a high pressure filter is also installed after the oil outlet of described one-way hydraulic pump, after electricity-liquid guide proportion relief valve oil outlet, before fuel tank, return filter is installed, air filter is installed simultaneously on fuel tank.
5. hydrostatic transmission detection platform load system according to claim 4, is characterized in that: a heater and a temperature transducer are installed in described fuel tank, cooler was installed simultaneously before return filter.
6. hydrostatic transmission detection platform load system according to claim 5, it is characterized in that: described hydrostatic transmission detection platform load system is provided with flow monitoring system before cooler after 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, and oil outlet is towards 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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| CN103696998A true CN103696998A (en) | 2014-04-02 |
| CN103696998B CN103696998B (en) | 2015-12-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536100A (en) * | 2020-04-30 | 2020-08-14 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111536100A (en) * | 2020-04-30 | 2020-08-14 | 肇庆学院 | Temperature control system and temperature control method for high-acceleration test bed of hydraulic element |
| 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 |
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| CN103696998B (en) | 2015-12-02 |
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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. |
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