CN201955241U - Hydraulic loading system for test bed of hydraulic lifter of tractor - Google Patents
Hydraulic loading system for test bed of hydraulic lifter of tractor Download PDFInfo
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- CN201955241U CN201955241U CN2010206669859U CN201020666985U CN201955241U CN 201955241 U CN201955241 U CN 201955241U CN 2010206669859 U CN2010206669859 U CN 2010206669859U CN 201020666985 U CN201020666985 U CN 201020666985U CN 201955241 U CN201955241 U CN 201955241U
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Abstract
The utility model discloses a hydraulic loading system for a test bed of a hydraulic lifter of a tractor. The hydraulic loading system comprises a loading oil cylinder, high-pressure large- and small-size pipelines, large and small-size check valves, a high-pressure low-flow hydraulic oil pump, large and small motors, high and low-pressure overflow valves, a hydraulic reversing valve, a low-pressure variable pump and a low-pressure pipeline, wherein the low-pressure variable pump is connected with the large motor; one end of the low-pressure pipeline is connected with an outlet of the low-pressure variable pump and the other end is connected with an inlet of the large-size check valve; an inlet of the low-pressure overflow valve is arranged between the low-pressure variable pump and the large-size check valve and is connected with the low-pressure pipeline; the high-pressure large-size pipeline is connected with an outlet of the check valve; a remote control port of the low-pressure overflow valve is connected with an oil inlet of the hydraulic reversing valve; a control oil port of the hydraulic reversing valve is connected with the high-pressure large-size pipeline; an inlet of the high-pressure overflow valve is connected with the loading oil cylinder through the high-pressure large and small-size pipelines; the small-size check valve is connected with an outlet of the high-pressure low-flow hydraulic oil pump and the high-pressure large-size pipeline through the high-pressure small-size pipeline; and the small motor is connected with the high-pressure low-flow hydraulic oil pump.
Description
Technical field
The utility model belongs to the testing apparatus field, relates to a kind of hydraulic pressure elevator of tractor testing table, relates in particular to a kind of hydraulic pressure elevator of tractor testing table hydraulic loading system.
Background technology
At present, domestic when tractor lifter parts are tested, no matter professional testing laboratory or manufacturing enterprise mostly take the mode that pouring weight (thing) loads or hydraulic jack loads that lifter is loaded.The hydraulic jack loading is little owing to taking up room, loading force is convenient to advantages application such as the adjusting and the different types of machines testing requirements that is content with very little more and more widely.But the employing solenoid electric valve that the hydraulic loading system of present domestic employing has etc., need electric sequencing robotization control, thereby manufacturing cost is higher, the employing electrohydraulic proportion technology that has, these Hydraulic Elements require high to oil cleanliness, thereby use cost is also higher, have when carrying out quiet settling test, power consumption is excessive.
The utility model content
The purpose of this utility model be to provide need not in a kind of course of work electrical equipment control, simple in structure, use cost is low, energy-conservation, hydraulic pressure elevator of tractor testing table hydraulic loading system that reliability is high.
The technical solution of the utility model is: a kind of hydraulic pressure elevator of tractor testing table hydraulic loading system comprises load cylinder, the big latus rectum pipeline of high pressure, the little latus rectum pipeline of high pressure, little latus rectum retaining valve, high-pressure low-flow hydraulic oil pump, small machine, high-pressure overflow valve, hydraulicchange-over valve, low pressure relief valve, big motor, low pressure variable output pump, low pressure line, big latus rectum retaining valve.Low pressure variable pump shaft is connected with big motor shaft, low pressure line one end is connected with low pressure variable delivery side of pump, the other end is connected with big latus rectum retaining valve inlet, the low pressure relief valve import is connected between low pressure variable output pump and big latus rectum retaining valve and with low pressure line, the big latus rectum pipeline of high pressure is connected with the outlet of retaining valve, the remote control mouth of low pressure relief valve is connected with the hydraulicchange-over valve oil-in, the control port of hydraulicchange-over valve is connected with the big latus rectum pipeline of high pressure, the high-pressure overflow valve inlet is connected with load cylinder with the little latus rectum pipeline of high pressure by the big latus rectum pipeline of high pressure, little latus rectum retaining valve is connected with the big latus rectum pipeline of high pressure with the outlet of high-pressure low-flow hydraulic oil pump by the little latus rectum pipeline of high pressure, and the small machine axle is connected with high-pressure low-flow hydraulic oil pump shaft.
The utility model adopts the good effect that produces after the technique scheme to be: 1. the low discharge high-pressure pump of small machine driving is when carrying out 30 minutes quiet settling tests, and the small machine power consumption is low and the hydraulic system heating is little; 2. hydraulic loading system need not automatically control and waits electrical apparatus technology just can satisfy testing requirements, so easy low cost of manufacture; 3. the hydraulic loading system principle is simple, during both realizability can have been tested lifting, decline and quiet settling test is loaded, and loads in the time of also can be to 300,000 fail-tests of lifter, and reliable operation, energy-saving effect are obvious.
Description of drawings
Accompanying drawing is the utility model hydraulic pressure elevator of tractor testing table hydraulic loading system structural representation.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described: a kind of hydraulic pressure elevator of tractor testing table hydraulic loading system comprises load cylinder 1, the big latus rectum pipeline 2 of high pressure, the little latus rectum pipeline 3 of high pressure, little latus rectum retaining valve 4, high-pressure low-flow hydraulic oil pump 5, small machine 6, high-pressure overflow valve 7, hydraulicchange-over valve 8, low pressure relief valve 9, big motor 10, low pressure variable output pump 11, low pressure line 12, big latus rectum retaining valve 13; 11 of low pressure variable output pumps are connected with big 10 in motor, low pressure line 12 1 ends are connected with the outlet of low pressure variable output pump 11, the other end is connected with big latus rectum retaining valve 13 inlets, low pressure relief valve 9 imports are connected between low pressure variable output pump 11 and big latus rectum retaining valve 13 and with low pressure line 12, low pressure relief valve 9 is regulated the pressure that load cylinder 1 descends, and just simulates farm implements weight.The big latus rectum pipeline 2 of high pressure is connected with the outlet of big latus rectum retaining valve 13, the remote control mouth of low pressure relief valve 9 is connected with hydraulicchange-over valve 8 oil-ins, the oil return opening of hydraulicchange-over valve 8 leads to fuel tank, the control port of hydraulicchange-over valve 8 is connected with the big latus rectum pipeline 2 of high pressure, the effect of hydraulicchange-over valve 8 is the unloadings that are controlled at lifting process mesolow surplus valve, energy savings.High-pressure overflow valve 7 inlets are connected with load cylinder 1 with the little latus rectum pipeline 3 of high pressure by the big latus rectum pipeline 2 of high pressure, and high-pressure overflow valve 7 is regulated and loaded cylinder pressure, just controls the lifting force size.Little latus rectum retaining valve 4 exports with high-pressure low-flow hydraulic oil pump 5 by the little latus rectum pipeline 3 of high pressure and is connected with the big latus rectum pipeline 2 of high pressure, and 6 of small machines are connected with 5 of high-pressure low-flow hydraulic oil pumps.
The working method of hydraulic loading system during the lifter test: as shown in drawings, big motor 10 is opened and is driven low pressure variable output pump 11, the hydraulic oil of low pressure variable output pump 11 is pushed big latus rectum retaining valve 13 open through 2 pairs of load cylinder 1 fuel feeding of the big latus rectum pipeline of high pressure by low pressure line 12, this moment, low pressure variable output pump 11 charge oil pressures were set by low pressure relief valve 9, this pressure makes load cylinder 1 produce the downward power (less) of simulation farm implements weight, is loaded on the lifter.When lifter promotes, the fluid of load cylinder 1 epicoele flows out, fluid is got back to fuel tank through the big latus rectum pipeline 2 of high pressure from high-pressure overflow valve 7, this moment, the pressure of load cylinder 1 was controlled by high-pressure overflow valve 7, this high pressure acts on load cylinder 1 epicoele makes load cylinder 1 produce downward power (bigger), is loaded on the lifter.In whole lifting process, the pressure of the little latus rectum pipeline 3 of high pressure of the big latus rectum pipeline 2 of high pressure, little latus rectum retaining valve 4 outlets is higher than the pressure in the little latus rectum pipeline 3 of high pressure of low pressure line 12 and little latus rectum retaining valve 4 imports, so little latus rectum retaining valve 4 and big latus rectum retaining valve 13 are closed, low pressure variable output pump 11 hydraulic oil flow back to fuel tank through low pressure line 12 by low pressure relief valve 9.Pressure height when promoting because of lifter again in the big latus rectum pipeline 2 of high pressure so hydraulicchange-over valve 8 is promoted commutation by highly pressurised liquid, connects the remote control mouth of low pressure relief valve 9, and low pressure relief valve 9 unloads, big motor 10 no-load runnings, energy savings.The hydraulic oil that is provided by low pressure variable output pump 11 when lifter descends is pushed the big latus rectum pipeline 2 of big latus rectum retaining valve 13 process high pressure open to load cylinder 1 fuel feeding through low pressure line 12, the working pressure of low pressure variable output pump 11 is set by low pressure relief valve 9 at this moment, this pressure makes load cylinder 1 produce the downward force (less) of simulation farm implements weight, be loaded on the lifter, decline rate is regulated by low pressure variable output pump 11, when the lifter kind of being tested was single, low pressure variable output pump 11 can be changed into the low pressure fixed displacement pump.Also be because lifter when descending the pressure in the big latus rectum pipeline 2 of high pressure low, so hydraulicchange-over valve 8 can not commutate, thereby the remote control mouth of low pressure relief valve 9 closes, and falling pressure is set by low pressure relief valve 9, instantly step-down power hour can be cancelled hydraulicchange-over valve 8.When 30 minutes quiet settling tests, big motor 10 stops, small machine 6 is opened and is driven high-pressure low-flow hydraulic oil pump 5, high-pressure low-flow hydraulic oil pump 5 provides hydraulic oil to push little latus rectum retaining valve 4 open through the little latus rectum pipeline 3 of high pressure and 2 pairs of load cylinder 1 fuel feeding of the big latus rectum pipeline of high pressure by the little latus rectum pipeline 3 of high pressure, because of the pressure height in the little latus rectum pipeline 3 of high pressure, so big latus rectum retaining valve 13 is closed, this moment, the pressure of load cylinder 1 was set by high-pressure overflow valve 7, this pressure acts on load cylinder 1 epicoele makes load cylinder 1 produce downward power (bigger), is loaded on the lifter.Because quiet settling amount is generally all very little, so the downward stroke of load cylinder 1 is very little, so though high-pressure low-flow hydraulic oil pump 5 pressure height flows are little, so small machine 6 power attenuations are very little, process of the test power consumption is little, has saved the energy.
Claims (1)
1. a hydraulic pressure elevator of tractor testing table hydraulic loading system comprises load cylinder (1), the big latus rectum pipeline of high pressure (2), the little latus rectum pipeline of high pressure (3), little latus rectum retaining valve (4), high-pressure low-flow hydraulic oil pump (5), small machine (6), high-pressure overflow valve (7), hydraulicchange-over valve (8), low pressure relief valve (9), big motor (10), low pressure variable output pump (11), low pressure line (12), big latus rectum retaining valve (13); It is characterized in that: low pressure variable output pump (11) axle is connected with big motor (10) axle, low pressure line (12) one ends are connected with the outlet of low pressure variable output pump (11), the other end is connected with big latus rectum retaining valve (13) inlet, low pressure relief valve (9) import is positioned between low pressure variable output pump (11) and the big latus rectum retaining valve (13) and with low pressure line (12) and is connected, the big latus rectum pipeline of high pressure (2) is connected with the outlet of retaining valve (13), the remote control mouth of low pressure relief valve (9) is connected with hydraulicchange-over valve (8) oil-in, the control port of hydraulicchange-over valve (8) is connected with the big latus rectum pipeline of high pressure (2), high-pressure overflow valve (7) inlet is connected with load cylinder (1) with the little latus rectum pipeline of high pressure (3) by the big latus rectum pipeline of high pressure (2), little latus rectum retaining valve (4) is connected with the big latus rectum pipeline of high pressure (2) with high-pressure low-flow hydraulic oil pump (5) outlet by the little latus rectum pipeline of high pressure (3), and small machine (6) axle is connected with high-pressure low-flow hydraulic oil pump (5) axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206669859U CN201955241U (en) | 2010-12-20 | 2010-12-20 | Hydraulic loading system for test bed of hydraulic lifter of tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206669859U CN201955241U (en) | 2010-12-20 | 2010-12-20 | Hydraulic loading system for test bed of hydraulic lifter of tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201955241U true CN201955241U (en) | 2011-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206669859U Expired - Fee Related CN201955241U (en) | 2010-12-20 | 2010-12-20 | Hydraulic loading system for test bed of hydraulic lifter of tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201955241U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167272A (en) * | 2018-02-12 | 2018-06-15 | 吉林大学 | A kind of tractor hydraulic lifting system final inspection experimental rig |
-
2010
- 2010-12-20 CN CN2010206669859U patent/CN201955241U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167272A (en) * | 2018-02-12 | 2018-06-15 | 吉林大学 | A kind of tractor hydraulic lifting system final inspection experimental rig |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20141220 |
|
| EXPY | Termination of patent right or utility model |