CN206972638U - A kind of four-quadrant hydraulic loading system - Google Patents
A kind of four-quadrant hydraulic loading system Download PDFInfo
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- CN206972638U CN206972638U CN201720763733.XU CN201720763733U CN206972638U CN 206972638 U CN206972638 U CN 206972638U CN 201720763733 U CN201720763733 U CN 201720763733U CN 206972638 U CN206972638 U CN 206972638U
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Abstract
The utility model discloses a kind of four-quadrant hydraulic loading system, and the A mouths and B mouths of variable delivery hydraulic pump/motor are connected respectively to the T mouths and P mouths of hand-operated direction valve；The A mouths and B mouths point of hand-operated direction valve are connected to the B mouths and A mouths of three-position four-way electromagnetic directional valve, and its B mouth is also connected to the P mouths of type pilot ratio electromagnetic type overflow valve；Type pilot ratio electromagnetic type overflow valve A mouths pass sequentially through cooler and filter is connected to the P mouths of three-position four-way electromagnetic directional valve；The T mouths of three-position four-way electromagnetic directional valve are connected to the A mouths of type pilot pressure-reducing valve and the A mouths of the first check valve；Manually stop valve is connected to accumulator for the P mouths of type pilot pressure-reducing valve and the P mouths of the first check valve；The P mouths of three-position four-way electromagnetic directional valve pass sequentially through the second check valve and hydraulic pump is connected to fuel tank.The utility model uses closed type hydraulic system, has the characteristics of high efficiency, high power density, and closed system has the advantages of small volume, floor space is small, and cost is low.
Description
Technical field
Hydraulic drive and control technical field is the utility model is related to, specifically a kind of four-quadrant hydraulic loading system.
Background technology
Hydraulic motor is a kind of executive component of hydraulic system, is the core parts of hydraulic system, and its performance is by direct shadow
The service behaviour of hydraulic system is rung and determines, so it is particularly important that hydraulic motor is made a service test.
There are three kinds to the loading method of hydraulic motor performance test at present:
The first is mechanical load method, has Prony brake loading, turns round the sides such as flat spring loading, inertia disk loading
Method.These methods are general all simple and easy, but because various limitations are not suitable for the situation of relatively high power, so not being suitable for
The hydraulic motor experiment of engineering machinery hydraulic transmission.The mechanical load of hydraulic motor experiment also includes being loaded and being used with hydraulic pump
The methods of hydraulic dynamometer loads, but these loading equipemtns are relatively complicated.
Second is electric loading method.The electricity of hydraulic motor experiment is loaded with electric dynamometer loading (bag DC balance
Motor loading, eddy current dynamometer loading, magnetic loader loading), direct current be electrically excited motor loading and automatic Load simulator
The methods of loading.But in general, these loading equipemtns are more complicated, and experimentation cost is higher.
The third is the loading of hydraulic motor back pressure, and this method is not directly to impose on loading moment on subject motor drive shaft,
But the method that series throttle (or overflow valve) loads on the oil return line of hydraulic motor.When pilot system hydraulic oil source is given
When being tested motor fuel feeding, reduce restriction aperture, the rise of motor back pressure, while also lead to the rise of motor inlet pressure.This
Kind method is not very safe.
Utility model content
The purpose of this utility model is that providing one kind uses closed type hydraulic system regarding to the issue above, and power density is big,
To strong by the parameter adaptation ability of test system, and the four-quadrant hydraulic pressure that can expand loading system test subject system condition scope adds
Loading system.Technical scheme is as follows：
A kind of four-quadrant hydraulic loading system, including variable delivery hydraulic pump/motor, hand-operated direction valve, 3-position 4-way electromagnetism change
To valve, type pilot ratio electromagnetic type overflow valve, type pilot pressure-reducing valve；
For variable delivery hydraulic pump/motor by starting building to make by clutch band by test system, its A mouth is connected to the T of hand-operated direction valve
Mouthful, its B mouth is connected to the P mouths of hand-operated direction valve；
The A mouths of hand-operated direction valve are connected to the B mouths of three-position four-way electromagnetic directional valve, and its B mouth is connected to 3-position 4-way simultaneously
The A mouths of solenoid directional control valve and the P mouths of type pilot ratio electromagnetic type overflow valve；
The remote control orifice of type pilot ratio electromagnetic type overflow valve is connected to the P mouths of the second two-position two-way electromagnetic directional valve；
Its A mouth is connected to the A mouths of the second two-position two-way electromagnetic directional valve, while passes sequentially through cooler and filter is connected to three four
The P mouths of electric change valve；
The T mouths of three-position four-way electromagnetic directional valve be connected to simultaneously the A mouths of type pilot pressure-reducing valve, the A mouths of the first check valve and；
Manually stop valve is connected to accumulator for the P mouths of type pilot pressure-reducing valve and the P mouths of the first check valve；Type pilot
The fluid leakage mouth of pressure-reducing valve is connected to fuel tank；
The P mouths of three-position four-way electromagnetic directional valve are also connected to the P mouths of pilot-type relief valve and the P of the second check valve simultaneously
Mouthful；
The remote control orifice of pilot-type relief valve is connected to the P mouths of the first two-position two-way electromagnetic directional valve, its A mouth and first
The A mouths of two-position two-way electromagnetic directional valve are all connected to fuel tank；
The A mouths of second check valve are connected to fuel tank by hydraulic pump.
Further, speed probe and torquemeter are additionally provided between the clutch and system under test (SUT)；
First check valve（16）A mouths also and pressure sensor（17）It is connected.
The beneficial effects of the utility model are：
1）The utility model uses closed type hydraulic system, has the characteristics of high efficiency, high power density, and closed system
With the advantages of small volume, floor space is small, and cost is low；
2）The working position that the utility model is worked by adjusting three-position four-way electromagnetic directional valve, is realized to by test system
Carry out on the occasion of the loading of load and to accumulator topping up, and to being carried out the loading of over-running load by test system, complete simultaneously
The release of fluid in accumulator, to facilitate maintenance overhaul；
3）The utility model uses type pilot ratio electromagnetic type overflow valve, and energy convenient using electro-hydraulic proportional pressure control
It is enough to meet subject system load requirement, the stability of setting pressure is improved, the pressure dynamic response performance of precursor overflow valve is than straight
Dynamic formula overflow valve is more preferable, and dynamic response is rapid, avoids pressure overshoot, vibration and hydraulic punch caused by Stress control Spline smoothing
Hit；
4）The utility model uses torquemeter, speed probe and pressure sensor can real-time monitoring system output torque,
Rotating speed and pressure；
5）The utility model substitutes pump using pump/motor, the metered flow of system is reduced, to by test system
Parameter adaptation ability is strong.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model four-quadrant hydraulic loading system.
In figure：1- fuel tanks；2- pilot-type relief valves；The two-position two-way electromagnetic directional valves of 3- first；4- coolers；5- is filtered
Device；The two-position two-way electromagnetic directional valves of 6- second；7- type pilot ratio electromagnetic type overflow valves；8- three-position four-way electromagnetic directional valves；9-
Accumulator；10- hand-operated direction valves；11- variable delivery hydraulic pump/motors；12- clutches；13- torquemeters；14- speed probes；15-
Hand stop valve；The check valves of 16- first；17- pressure sensors；18- type pilot pressure-reducing valves；The check valves of 19- second；20- hydraulic pressure
Pump；21- motors；22- is by test system.
Embodiment
The utility model is described in further details with specific embodiment below in conjunction with the accompanying drawings.As shown in figure 1, one kind four
Quadrant hydraulic loading system, including variable delivery hydraulic pump/motor 11, hand-operated direction valve 10, three-position four-way electromagnetic directional valve 8, guide
Type ratio electromagnetic type overflow valve 7, type pilot pressure-reducing valve 18；
For variable delivery hydraulic pump/motor 11 by driving work by clutch 12 by test system 22, its A mouth is connected to manual reverse of direction
The T mouths of valve 10, its B mouth are connected to the P mouths of hand-operated direction valve 10；
The A mouths of hand-operated direction valve 10 are connected to the B mouths of three-position four-way electromagnetic directional valve 8, and its B mouth is connected to three four simultaneously
The A mouths of electric change valve 8 and the P mouths of type pilot ratio electromagnetic type overflow valve 7；
The remote control orifice of type pilot ratio electromagnetic type overflow valve 7 is connected to the P mouths of the second two-position two-way electromagnetic directional valve；
Its A mouth is connected to the A mouths of the second two-position two-way electromagnetic directional valve 6, while passes sequentially through cooler 4 and filter 5 is connected to three
The P mouths of position four-way electromagnetic reversing valve 8；
The T mouths of three-position four-way electromagnetic directional valve 8 are connected to A mouths, the A of the first check valve 16 of type pilot pressure-reducing valve 18 simultaneously
Mouth and pressure sensor 17；
Manually stop valve 15 is connected to accumulator to the P mouths of the P mouths of type pilot pressure-reducing valve 18 and the first check valve 16
9；The fluid leakage mouth of type pilot pressure-reducing valve 18 is connected to fuel tank 1；
The P mouths of three-position four-way electromagnetic directional valve 8 are also connected to the P mouths and the second check valve 19 of pilot-type relief valve 2 simultaneously
P mouths；
The remote control orifice of pilot-type relief valve 2 is connected to the P mouths of the first two-position two-way electromagnetic directional valve 3, its A mouth and
The A mouths of one two-position two-way electromagnetic directional valve 3 are all connected to fuel tank 1；
The A mouths of second check valve 19 are connected to fuel tank 1 by hydraulic pump 20.
Speed probe 14 and torquemeter 13 are additionally provided between the clutch 12 and system under test (SUT) of the present embodiment, can be real-time
Monitoring system output torque, rotating speed.The T mouths of the three-position four-way electromagnetic directional valve 8 of the present embodiment are additionally provided with pressure sensor 17, can
The pressure of real-time monitoring system.
When three-position four-way electromagnetic directional valve 8 works in right position, by the tune for setting type pilot ratio electromagnetic type overflow valve 7
Constant-pressure, constant load torque is set up using variable delivery hydraulic pump/motor 11, now variable delivery hydraulic pump/motor is in hydraulic pressure
Motor operating conditions, can be to being carried out on the occasion of the loading of load and to accumulator topping up by test system；When three-position four-way electromagnetic directional valve 8
When working in middle position, off-load can be carried out to hydraulic variable flow pump/motor 11, the fluid in accumulator 9 can also discharge, convenient
Maintenance overhaul；When three-position four-way electromagnetic directional valve 8 works in left position, accumulator 9 releases fluid and passes through type pilot pressure-reducing valve
18 regulation outlet pressures are constant, constant over-running load moment of torsion set up using variable delivery hydraulic pump/motor 11, now variable delivery hydraulic
Pump/motor is in hydraulic pressure pump condition, can be to by the loading of test system progress over-running load.
The system realizes that the specific work process of three functions is as follows：
（1）On the occasion of the application of load torque：Three-position four-way electromagnetic directional valve 8 is switched on into right position, the first bi-bit bi-pass electricity
The two-position two-way electromagnetic directional valve 6 of magnetic reversal valve 3 and second switch on it is upper, start motor 21, drive hydraulic pump 20 work, from oil
The oil suction of case 1, low pressure fluid pass through the second check valve 19, the P mouths of three-position four-way electromagnetic directional valve 8, B mouths and hand-operated direction valve successively
10 A mouths, P mouths reach the B mouths of variable delivery hydraulic pump/motor 11, now drive variable delivery hydraulic by clutch 12 by test system 22
Pump/motor 11 works, so hydraulic pump/motor 11 is in hydraulic motor operating mode.
By setting the set pressure of type pilot ratio electromagnetic type overflow valve 7, from the A mouth streams of variable delivery hydraulic pump/motor 11
The high-voltage oil liquid gone out the T mouths Jing Guo hand-operated direction valve 10 and B mouths, the A mouths of three-position four-way electromagnetic directional valve 8 and T mouths, pressure successively
Sensor 17, the first check valve 16 and hand stop valve 15, are finally stored in accumulator 9.
The set pressure of type pilot ratio electromagnetic type overflow valve 7 determines the supercharging pressure of accumulator 9, by gathering pressure
The data of sensor 17, when pressure reaches our demand pressures, hand stop valve 15 is closed, when system pressure reaches type pilot
The overflow of type pilot ratio electromagnetic type overflow valve 7 during the setting pressure of ratio electromagnetic type overflow valve 7, maintain pressure constant, pass through change
Amount hydraulic pump/motor 11 sets up load torque and hinders subject system operation, completes the loading of load, and due to system pressure height
In the fluid that the set pressure institute overflow of type pilot ratio electromagnetic type overflow valve 7 goes out successively by filter 5,4, three, cooler
The P mouths of four-way electromagnetic reversing valve 8, the A mouths of B mouths and hand-operated direction valve 10, P mouths return to the B mouths of variable delivery hydraulic pump/motor 11, shape
Into a closed circuit.Pilot-type relief valve 2 has two effects：First, play safety valve, for limiting hydraulic system
Maximum pressure, the overflow of pilot-type relief valve 2 when system pressure reaches the setting pressure of pilot-type relief valve 2；First, maintain to mend
Fuel pump outlet oil liquid pressure it is constant.
（2）The application of over-running load moment of torsion：Three-position four-way electromagnetic directional valve 8 is switched on into left position, opens hand stop valve
15, the high-voltage oil liquid of accumulator 9 by hand stop valve 15, type pilot pressure-reducing valve 18, three-position four-way electromagnetic directional valve 8 T mouths,
The A mouths of B mouths and hand-operated direction valve 10, P mouths reach the B mouths of variable delivery hydraulic pump/motor 11, and driving variable delivery hydraulic pump/motor 11 revolves
Turn, run so as to drive by test system 22, now hydraulic pump/motor 11 is in hydraulic pressure pump condition.
By the set pressure for setting type pilot pressure-reducing valve 18 so that the fluid flowed out from the A mouths of type pilot pressure-reducing valve 18
Pressure is constant, and the fluid revealed flows back to fuel tank 1, the final over-running load moment of torsion perseverance for ensureing variable delivery hydraulic pump/motor 11 and establishing
It is fixed.
Low pressure fluid flows out from the A mouths of variable delivery hydraulic pump/motor 11, successively by the T mouths of hand-operated direction valve 10, B mouths and
The A mouths of three-position four-way electromagnetic directional valve 8, P mouths, the two-position two-way electromagnetic directional valve 3 of pilot-type relief valve 2 and first, are finally flowed back to
Fuel tank 1.
（3）To remaining fluid in the off-load of variable delivery hydraulic pump/motor 11 and release accumulator 9：After the completion of experiment, by three four
Electric change valve 8 switches on middle position, and now the oil inlet of variable delivery hydraulic pump/motor 11 is connected with oil-out, in free state,
Fluid in accumulator 9 manually stop valve 15, pressure-reducing valve 18, the T mouths of three-position four-way electromagnetic directional valve 8, P mouths, type pilot
The two-position two-way electromagnetic directional valve 3 of overflow valve 2 and first, finally flows back to fuel tank 1.
The hand stop valve 15 of the entrance of accumulator 9 is mainly used in the off-load operation of system overhaul.According to different operating mode need
Ask, by setting the set pressure of type pilot ratio electromagnetic type overflow valve 7, can adjust the pressure stability of maintenance system, it is established that
Stable load torque；By setting the set pressure of type pilot pressure-reducing valve 18, the pressure of the outlet of accumulator 9 fluid can be maintained steady
It is fixed, it is established that stable over-running load moment of torsion.Data by gathering pressure sensor 17 may determine that the supercharging pressure of accumulator 9
Whether meet demand, whether just the data by gathering torquemeter 13 and speed probe 14 may determine that the load torque of loading
Really, guarantee test normal operation.
Claims (2)
1. a kind of four-quadrant hydraulic loading system, it is characterised in that including variable delivery hydraulic pump/motor（11）, hand-operated direction valve
（10）, three-position four-way electromagnetic directional valve（8）, type pilot ratio electromagnetic type overflow valve（7）, type pilot pressure-reducing valve（18）；
Variable delivery hydraulic pump/motor（11）By by test system（22）Pass through clutch（12）Work is driven, its A mouth is connected to be changed manually
To valve（10）T mouths, its B mouth is connected to hand-operated direction valve（10）P mouths；
Hand-operated direction valve（10）A mouths be connected to three-position four-way electromagnetic directional valve（8）B mouths, its B mouth is connected to three four simultaneously
Electric change valve（8）A mouths and type pilot ratio electromagnetic type overflow valve（7）P mouths；
Type pilot ratio electromagnetic type overflow valve（7）Remote control orifice be connected to the P mouths of the second two-position two-way electromagnetic directional valve；Its
A mouths are connected to the second two-position two-way electromagnetic directional valve（6）A mouths, while pass sequentially through cooler（4）And filter（5）Connection
To three-position four-way electromagnetic directional valve（8）P mouths；
Three-position four-way electromagnetic directional valve（8）T mouths simultaneously be connected to type pilot pressure-reducing valve（18）A mouths, the first check valve（16）
A mouths；
Type pilot pressure-reducing valve（18）P mouths and the first check valve（16）P mouths manually stop valve（15）It is connected to accumulation of energy
Device（9）；Type pilot pressure-reducing valve（18）Fluid leakage mouth be connected to fuel tank（1）；
Three-position four-way electromagnetic directional valve（8）P mouths also simultaneously be connected to pilot-type relief valve（2）P mouths and the second check valve
（19）P mouths；
Pilot-type relief valve（2）Remote control orifice be connected to the first two-position two-way electromagnetic directional valve（3）P mouths, its A mouth and
One two-position two-way electromagnetic directional valve（3）A mouths be all connected to fuel tank（1）；
Second check valve（19）A mouths pass through hydraulic pump（20）It is connected to fuel tank（1）.
2. four-quadrant hydraulic loading system according to claim 1, it is characterised in that the clutch（12）With tested system
Speed probe is additionally provided between system（14）And torquemeter（13）；First check valve（16）A mouths also and pressure sensing
Device（17）It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720763733.XU CN206972638U (en) | 2017-06-28 | 2017-06-28 | A kind of four-quadrant hydraulic loading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720763733.XU CN206972638U (en) | 2017-06-28 | 2017-06-28 | A kind of four-quadrant hydraulic loading system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206972638U true CN206972638U (en) | 2018-02-06 |
Family
ID=61406561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720763733.XU Withdrawn - After Issue CN206972638U (en) | 2017-06-28 | 2017-06-28 | A kind of four-quadrant hydraulic loading system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206972638U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269614A (en) * | 2017-06-28 | 2017-10-20 | 西南交通大学 | A kind of four-quadrant hydraulic loading system |
| CN109345943A (en) * | 2018-10-31 | 2019-02-15 | 西安航空学院 | A kind of Hydraulic Elements theory Internet-based and experimental synchronous tutoring system |
-
2017
- 2017-06-28 CN CN201720763733.XU patent/CN206972638U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269614A (en) * | 2017-06-28 | 2017-10-20 | 西南交通大学 | A kind of four-quadrant hydraulic loading system |
| CN109345943A (en) * | 2018-10-31 | 2019-02-15 | 西安航空学院 | A kind of Hydraulic Elements theory Internet-based and experimental synchronous tutoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180206 Effective date of abandoning: 20181030 |