CN205175684U - A hydraulic loading system for gearbox rack pressure test - Google Patents
A hydraulic loading system for gearbox rack pressure test Download PDFInfo
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- CN205175684U CN205175684U CN201520705097.6U CN201520705097U CN205175684U CN 205175684 U CN205175684 U CN 205175684U CN 201520705097 U CN201520705097 U CN 201520705097U CN 205175684 U CN205175684 U CN 205175684U
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Abstract
The utility model relates to a hydraulic loading system for gearbox rack pressure test. Including motor, oil tank, selection return circuit mechanism, first switching -over valve and second switching -over valve, the motor uses as the two -way pump, the bridge type mechanism of selecting return circuit mechanism to comprise four check valves has two bridge imports, and a bridge export and a bridge are answered back, two hydraulic fluid ports of motor are communicateing two bridge imports selecting return circuit mechanism, select the bridge export of return circuit mechanism communicateing the oil inlet of first switching -over valve and the oil inlet of second switching -over valve respectively, and the bridge is answered back and is being communicate the oil tank, first switching -over valve and second switching -over valve all have an oil inlet, two oil -outs and an oil return opening, the during operation is being connected the spindle nose of motor by the output of the gearbox tested, output speed by the examination gearbox is less than 250rmin. The utility model discloses a construction cost closed loading electric relatively and electric eddy current dynamometer loading mode greatly reduced, the operation controls of just being convenient for easily realizes overload protection.
Description
Technical field
The utility model belongs to fork truck technical field, is specifically related to the test unit that wheel box loads.
Background technology
At present, the load mode of wheel box stand strength test adopts electrical-closed load mode mostly, and namely loading motor uses as generator, and the electric energy inversion that loading motor institute absorbed power produces feeds back to dragging motor, with economize energy; Electrical-closed load mode control system is complicated, and drop into high, for low power wheel box, early investment is much larger than the energy-conservation return in later stage.Wheel box stand strength test load mode also has the load modes such as electric eddy current dynamometer load mode and magnetic powder brake.Electric eddy current dynamometer load mode control system is also comparatively complicated, and input cost is also higher.Magnetic powder brake reduces because self reason can cause loading moment of torsion in long duration test process, the less stable of loading.
Utility model content
In order to the problem that the loading system complex structure and construction cost that solve the strenuous test of miniwatt wheel box are high, the utility model provides a kind of hydraulic loading system for the strength test of wheel box stand of modified node method.
Hydraulic loading system for the strength test of wheel box stand comprises motor 6, fuel tank 8, selects loop mechanism, the first reversal valve 12 and the second reversal valve 17;
Described motor 6 for having the motor of rotating function, and uses as two-way pump; The bridge type mechanism that described selection loop mechanism is made up of four retaining valves, has two bridge imports, and a bridge outlet and a bridge are answered back; Oil-in and the oil-out of motor 6 are communicated with two the bridge imports selecting loop mechanism respectively, and select the outlet of the bridge of loop mechanism to be communicated with the oil-in of the first reversal valve 12 and the oil-in of the second reversal valve 17 respectively, bridge is answered back and is communicated with fuel tank 8;
Described first reversal valve 12 and the second reversal valve 17 all have an oil-in, two oil-outs and an oil return opening; Two oil-outs of the first reversal valve 12 lead to surplus valve respectively and are communicated with back oil road, and two outlets of the second reversal valve 17 are led to surplus valve respectively and are communicated with back oil road; The oil return opening of the first reversal valve 12 and the oil return opening parallel communication of the second reversal valve 17 back oil road;
During work, the output terminal of tested wheel box is connected to the transmission output shaft of motor 6, and the output speed of described tested wheel box 7 is lower than 250r/min.
Described four retaining valves are respectively the first retaining valve 2, second retaining valve 3, the 3rd retaining valve 4 and the 4th retaining valve 5; First retaining valve 2 and the 3rd retaining valve 4 series aiding connection, series connection place forms the bridge import selecting loop mechanism; Second retaining valve 3 and the 4th retaining valve 5 series aiding connection, series connection place forms another bridge import selecting loop mechanism; The outlet of the first retaining valve 2 and the outlet parallel connection of the second retaining valve 3 are formed selects the bridge of loop mechanism to answer back, and the entrance of the 3rd retaining valve 4 and the entrance parallel connection of the 4th retaining valve 5 form the bridge outlet selecting loop mechanism.
The bridge of loop mechanism is selected to answer back oil absorption filter 1 of connecting.
Described first reversal valve 12 and the second reversal valve 17 are three-position four-way electromagnetic directional valve;
Connecting the second surplus valve 15 in the oil-out A2 place of the first reversal valve 12, connects the first surplus valve 14 in oil-out B2 place; Remote pressure regulating valve 13 in parallel between the oil return inlet T 2 of the first reversal valve 12 and the external control hydraulic fluid port of the first surplus valve 14;
Connecting the 4th surplus valve 18 in the oil-out A1 place of the second reversal valve 17, connects the 3rd surplus valve 16 in oil-out B1 place; Between the oil inlet P 1 of the second reversal valve 17 and the outlet of the 4th surplus valve 18, electromagnetism in parallel overflows valve 19.
The overflow inflow point of valve 19 of described electromagnetism is provided with pressure transducer 20 and tensimeter 21.
The outlet of the 5th retaining valve the 11, five retaining valve 11 of connecting between the oil return inlet T 2 of the first reversal valve 12 and the oil-out B of remote pressure regulating valve 13 oil return inlet T 2 of the first reversal valve 12.
Advantageous Effects of the present utility model embodies in the following areas:
1, the relative electrical-closed load of hydraulic loading system construction cost of the present utility model and electric eddy current dynamometer load mode reduce greatly, and convenient operation controls, and is easy to realize overload protection.
2, the pressure of hydraulic loading system is once set, and loading moment of torsion in relative magnetic powder brake loading long duration test process can reduce, and it is more stable that hydraulic loaded mode of the present utility model loads moment of torsion.
Accompanying drawing explanation
Fig. 1 is the utility model hydraulic loading system schematic diagram.
Sequence number in Fig. 1: oil absorption filter 1, first retaining valve 2, second retaining valve 3, the 3rd retaining valve 4, the 4th retaining valve 5, motor 6, tested wheel box 7, fuel tank 8, return filter 9, refrigeratory 10, the 5th retaining valve 11, first reversal valve 12, remote pressure regulating valve 13, first surplus valve 14, second surplus valve 15, the 3rd surplus valve 16, second reversal valve 17, the 4th surplus valve 18, electromagnetic relief valve 19, pressure transducer 20, tensimeter 21.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is further described.
See Fig. 1, the hydraulic loading system for the strength test of wheel box stand comprises motor 6, fuel tank 8, selects loop mechanism, the first reversal valve 12 and the second reversal valve 17.
Described motor 6 for having the motor of rotating function, and uses (conventional two-way pump operates under not being suitable for this rotating speed) as two-way pump, and motor 6 model is INM2-350.
The bridge type mechanism selecting loop mechanism to be made up of four retaining valves, has two bridge imports, and a bridge outlet and a bridge are answered back.Four retaining valves are respectively the first retaining valve 2, second retaining valve 3, the 3rd retaining valve 4 and the 4th retaining valve 5; First retaining valve 2 and the 3rd retaining valve 4 series aiding connection, series connection place forms the first bridge import selecting loop mechanism; Second retaining valve 3 and the 4th retaining valve 5 series aiding connection, series connection place forms the second bridge import selecting loop mechanism; The outlet of the first retaining valve 2 and the outlet parallel connection of the second retaining valve 3 are formed selects the bridge of loop mechanism to answer back, and the entrance of the 3rd retaining valve 4 and the entrance parallel connection of the 4th retaining valve 5 form the bridge outlet selecting loop mechanism.
Oil-in and the oil-out of motor 6 are communicated with the first bridge import and the second bridge import of selecting loop mechanism respectively, the outlet of the bridge of loop mechanism is selected to be communicated with the oil-in of the first reversal valve 12 and the oil-in of the second reversal valve 17 respectively, bridge is answered back and is communicated with fuel tank 8, the oil absorption filter 1 and connect in the bridge place of answering back.
Described first reversal valve 12 and the second reversal valve 17 are three-position four-way electromagnetic directional valve, all have an oil-in, two oil-outs and an oil return opening;
Two oil-outs of the first reversal valve 12 lead to surplus valve respectively and are communicated with back oil road, and two outlets of the second reversal valve 17 are led to surplus valve respectively and are communicated with back oil road; The oil return opening of the first reversal valve 12 and the oil return opening parallel communication of the second reversal valve 17 back oil road; Connecting the second surplus valve 15 in the oil-out A2 place of the first reversal valve 12, connects the first surplus valve 14 in oil-out B2 place; Remote pressure regulating valve 13 in parallel between the oil return inlet T 2 of the first reversal valve 12 and the external control hydraulic fluid port of the first surplus valve 14; The outlet of the 5th retaining valve the 11, five retaining valve 11 of connecting between the oil return inlet T 2 of the first reversal valve 12 and the oil-out B of remote pressure regulating valve 13 oil return inlet T 2 of the first reversal valve 12.
Connecting the 4th surplus valve 18 in the oil-out A1 place of the second reversal valve 17, connects the 3rd surplus valve 16 in oil-out B1 place; Between the oil inlet P 1 of the second reversal valve 17 and the outlet of the 4th surplus valve 18, electromagnetism in parallel overflows valve 19; The overflow inflow point of valve 19 of electromagnetism is provided with pressure transducer 20 and tensimeter 21.
During work, the output terminal of tested wheel box is connected to the spindle nose of motor 6, and the output speed of tested wheel box 7 is lower than 250r/min.
Hydraulic loading system of the present utility model can realize manually and from dynamic test two kinds of modes, concrete principle of work is respectively described below:
(1) no-load test
During tested wheel box 7 forward (oppositely) running, the hydraulic fluid port P3 (time reverse hydraulic fluid port P4) of motor 6 is inlet port, hydraulic fluid port P4 (time reverse hydraulic fluid port P3) is oil drain out, second retaining valve 3 when the first retaining valve 2(of hydraulic fluid port P3 (time reverse hydraulic fluid port P4) in bridge type return is reverse) oil suction from fuel tank 8, the 3rd retaining valve 4 when the 4th retaining valve 5(of hydraulic fluid port P4 (time reverse hydraulic fluid port P3) in bridge type return of motor 6 is reverse) through the direct oil return box of electromagnetic relief valve 19 no-load overflow.
(2) the manual load test of wheel box 7
The suction oil of motor 6 is identical with no-load test.The now operation valve bottom access oil circuit of electromagnetic relief valve 19, electromagnetic relief valve 19 makees security of system valve and uses, the first right position of reversal valve 12 is connected simultaneously, and the hydraulic oil that motor 6 is discharged overflows back fuel tank through the first surplus valve 14, is regulated the size of loaded load by the pressure adjusting the first surplus valve 14.The pressure of the first surplus valve 14 can directly be set up, and also can be regulated by remote pressure regulating valve 13.
(3) wheel box 7 is from dynamic test
The suction oil of motor 6 is identical with no-load test, and the operation valve bottom access oil circuit of electromagnetic relief valve 19, electromagnetic relief valve 19 makees security of system valve and uses.The 4th surplus valve 18 in pressure-control circuit, the 3rd surplus valve 16 and the second surplus valve 15 set low pressure, medium and high pressure three kinds of pressure respectively, the operation valve bottom access oil circuit of electromagnetic relief valve 19, use as security of system valve equally, when the second left position of reversal valve 17 is connected (namely P1, A1 are communicated with), the hydraulic oil that motor 6 is discharged overflows back fuel tank through the 4th surplus valve 18, and namely tested wheel box 7 operated under operating mode at low year; When the second right position of reversal valve 17 is connected (namely P1, B1 are communicated with), the hydraulic oil that motor 6 is discharged overflows back fuel tank through the 3rd surplus valve 16, namely tested wheel box 7 in operate under year operating mode; Equally when the first left position of reversal valve 12 is connected (namely P2, A2 are communicated with), the hydraulic oil that motor 6 is discharged overflows back fuel tank through the second surplus valve 15, and namely tested wheel box 7 operates under height carries operating mode.Hydraulic loaded can produce a large amount of heat, is furnished with refrigeratory 10 pairs of hydraulic oil and cools in system.
Claims (6)
1. for the hydraulic loading system of wheel box stand strength test, it is characterized in that: comprise motor (6), fuel tank (8), select loop mechanism, the first reversal valve (12) and the second reversal valve (17);
Described motor (6) for having the motor of rotating function, and uses as two-way pump; The bridge type mechanism that described selection loop mechanism is made up of four retaining valves, has two bridge imports, and a bridge outlet and a bridge are answered back; Oil-in and the oil-out of motor (6) are communicated with two the bridge imports selecting loop mechanism respectively, select the outlet of the bridge of loop mechanism to be communicated with the oil-in of the first reversal valve (12) and the oil-in of the second reversal valve (17) respectively, bridge is answered back and is communicated with fuel tank (8);
Described first reversal valve (12) and the second reversal valve (17) all have an oil-in, two oil-outs and an oil return opening; Two oil-outs of the first reversal valve (12) are communicated with back oil road respectively by surplus valve, and two outlets of the second reversal valve (17) are communicated with back oil road respectively by surplus valve; The oil return opening of the first reversal valve (12) and the oil return opening parallel communication of the second reversal valve (17) back oil road;
During work, the output terminal of tested wheel box is connected to the transmission output shaft of motor (6), and the output speed of described tested wheel box (7) is lower than 250r/min.
2. the hydraulic loading system for the strength test of wheel box stand according to claim 1, is characterized in that: described four retaining valves are respectively the first retaining valve (2), the second retaining valve (3), the 3rd retaining valve (4) and the 4th retaining valve (5); First retaining valve (2) and the 3rd retaining valve (4) series aiding connection, series connection place forms the bridge import selecting loop mechanism; Second retaining valve (3) and the 4th retaining valve (5) series aiding connection, series connection place forms another bridge import selecting loop mechanism; The outlet of the first retaining valve (2) and the outlet parallel connection of the second retaining valve (3) are formed selects the bridge of loop mechanism to answer back, and the entrance of the 3rd retaining valve (4) and the entrance parallel connection of the 4th retaining valve (5) form the bridge outlet selecting loop mechanism.
3. the hydraulic loading system for the strength test of wheel box stand according to claim 1 and 2, is characterized in that: select the bridge of loop mechanism to answer back oil absorption filter (1) of connecting.
4. the hydraulic loading system for the strength test of wheel box stand according to claim 1, is characterized in that: described first reversal valve (12) and the second reversal valve (17) are three-position four-way electromagnetic directional valve;
Connecting the second surplus valve (15) in the oil-out A2 place of the first reversal valve (12), connects the first surplus valve (14) in oil-out B2 place; Remote pressure regulating valve (13) in parallel between the oil return inlet T 2 of the first reversal valve (12) and the external control hydraulic fluid port of the first surplus valve (14);
Connecting the 4th surplus valve (18) in the oil-out A1 place of the second reversal valve (17), connects the 3rd surplus valve (16) in oil-out B1 place; Between the oil inlet P 1 of the second reversal valve (17) and the outlet of the 4th surplus valve (18), electromagnetism in parallel overflows valve (19).
5. the hydraulic loading system for the strength test of wheel box stand according to claim 4, is characterized in that: the overflow inflow point of valve (19) of described electromagnetism is provided with pressure transducer (20) and tensimeter (21).
6. the hydraulic loading system for the strength test of wheel box stand according to claim 4, it is characterized in that: the 5th retaining valve (11) of connecting between the oil return inlet T 2 of the first reversal valve (12) and the oil-out B of remote pressure regulating valve (13), the outlet of the 5th retaining valve (11) the oil return inlet T 2 of the first reversal valve (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520705097.6U CN205175684U (en) | 2015-09-11 | 2015-09-11 | A hydraulic loading system for gearbox rack pressure test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520705097.6U CN205175684U (en) | 2015-09-11 | 2015-09-11 | A hydraulic loading system for gearbox rack pressure test |
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| Publication Number | Publication Date |
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| CN205175684U true CN205175684U (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520705097.6U Active CN205175684U (en) | 2015-09-11 | 2015-09-11 | A hydraulic loading system for gearbox rack pressure test |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136452A (en) * | 2015-09-11 | 2015-12-09 | 安徽合力股份有限公司 | Hydraulic loading system used for gearbox bench strength test |
| CN106438553A (en) * | 2016-09-17 | 2017-02-22 | 北京电力设备总厂有限公司 | Novel hydraulic loading system for coal mill |
| CN108106842A (en) * | 2018-02-08 | 2018-06-01 | 北京航空航天大学 | A kind of speed changer loading and self shifter testing stand |
| CN108972148A (en) * | 2018-06-26 | 2018-12-11 | 北京工业大学 | A kind of constructional device for realizing the controllable simulation actual condition of preload |
-
2015
- 2015-09-11 CN CN201520705097.6U patent/CN205175684U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136452A (en) * | 2015-09-11 | 2015-12-09 | 安徽合力股份有限公司 | Hydraulic loading system used for gearbox bench strength test |
| CN106438553A (en) * | 2016-09-17 | 2017-02-22 | 北京电力设备总厂有限公司 | Novel hydraulic loading system for coal mill |
| CN108106842A (en) * | 2018-02-08 | 2018-06-01 | 北京航空航天大学 | A kind of speed changer loading and self shifter testing stand |
| CN108972148A (en) * | 2018-06-26 | 2018-12-11 | 北京工业大学 | A kind of constructional device for realizing the controllable simulation actual condition of preload |
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