CN201843861U - Small-flow high-pressure oil source device with stepless variable - Google Patents
Small-flow high-pressure oil source device with stepless variable Download PDFInfo
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- CN201843861U CN201843861U CN2010205802913U CN201020580291U CN201843861U CN 201843861 U CN201843861 U CN 201843861U CN 2010205802913 U CN2010205802913 U CN 2010205802913U CN 201020580291 U CN201020580291 U CN 201020580291U CN 201843861 U CN201843861 U CN 201843861U
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- motor
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- hydraulic
- hydraulic pump
- source device
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a small-flow high-pressure oil source device with a stepless variable. The output end of a rotating speed setter is connected with the input end of a frequency converter, the output end of the frequency converter is connected with the control input end of a motor, and an output shaft of the motor is connected with an input shaft of a small-displacement quantitative hydraulic pump. The device overcomes the defect of a traditional conventional hydraulic oil source and is suitable for the performance test of a small-flow high-pressure hydraulic element. Moreover, the energy consumption of the oil source device is saved.
Description
Technical field
The utility model relates to a kind of small flow high pressure fuel source device of stepless variable.
Background technique
Hydraulic element are widely used in all kinds of hydraulic control systems, the use of hydraulic element need be done the test of every performance, when carrying out the hydraulic element testing property, the hydraulic oil source that adapts with hydraulic element rated pressure, flow is absolutely necessary, and parameters such as the pressure of hydraulic oil source, flow there is higher requirement, as pressure pulsation, range of flow etc.
Such as a kind of electric-hydraulic proportion pilot operated compound relief valve, its Maximum operating pressure is 24.5MPa, minimum discharge 0.3L/min, peak rate of flow 2L/min.Because its peak rate of flow has only 2L/min, when its performance is detected, test as pressure skew and the test of pressure runout, steady state pressure control characteristic, use conventional hydraulic oil source to be difficult to detect its genuine property state, secondly a large amount of unnecessary fluid of conventional hydraulic oil source overflows back fuel tank by relief valve, causes energy loss and fluid temperature rise.Therefore conventional hydraulic oil source can't adapt to the testing property of these type of hydraulic element, and increases the energy consumption of oil sources.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of small flow high pressure fuel source device of stepless variable, this device has overcome the defective of traditional conventional hydraulic oil source, be applicable to the testing property of small flow, high-pressure and hydraulic element, and saved the energy consumption of oil sources device.
For solving the problems of the technologies described above, the small flow high pressure fuel source device of the utility model stepless variable comprises float amount quantitative hydraulic pump, motor, frequency variator and speed setting device, the output terminal of described speed setting device connects the input end of described frequency variator, the output terminal of described frequency variator connects the control input end of described motor, and the output shaft of described motor connects the input shaft of described float amount quantitative hydraulic pump.
Be convenient monitoring motor speed, intuitively grasp the flow of oil sources device, this device also comprises tachometer, and described tachometer connects the output shaft of described motor.
Because the small flow high pressure fuel source device of the utility model stepless variable has adopted technique scheme, it is the input end of the output terminal connection frequency variator of speed setting device, the output terminal of frequency variator connects the control input end of motor, and the output shaft of motor connects the input shaft of float amount quantitative hydraulic pump.This device has overcome the defective of traditional conventional hydraulic oil source, is applicable to the testing property of small flow, high-pressure and hydraulic element, and has saved the energy consumption of oil sources device.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and embodiments:
Fig. 1 is the theory diagram of the small flow high pressure fuel source device of the utility model stepless variable,
Fig. 2 is the hydraulic control system schematic diagram that this oil sources device is used.
Embodiment
As shown in Figure 1, the small flow high pressure fuel source device of the utility model stepless variable comprises float amount quantitative hydraulic pump 4, motor 3, frequency variator 2 and speed setting device 1, the output terminal of described speed setting device 1 connects the input end of described frequency variator 2, the output terminal of described frequency variator 2 connects the control input end of described motor 3, and the output shaft of described motor 3 connects the input shaft of described float amount quantitative hydraulic pump 4.
Be convenient monitoring motor 3 rotating speeds, intuitively grasp the flow of oil sources device, this device also comprises tachometer 5, and described tachometer 5 connects the output shaft of described motor 3.
When the hydraulic element testing property, test parameter according to hydraulic element, set the rotating speed of motor by the speed setting device, the speed setting device outputs to frequency variator with the rotating speed of input with electrical signal, frequency variator is according to the electrical signal that receives, through after the computing, adjust the motor frequency of supply, the rotating speed of motor is along with respective change is done in the variation of the frequency of supply of frequency variator, the required hydraulic oil of motoring float amount quantitative hydraulic pump rotation output hydraulic element test this moment, because the discharge capacity of float amount quantitative hydraulic pump is a fixed value, therefore, oil hydraulic pump output fluid flow is directly proportional with the drive motor rotating speed, like this, but the flow of oil hydraulic pump output is step-less adjustment just, provides the hydraulic element test required oil sources.Tachometer real-time demonstration motor speed is set, be convenient to intuitively grasp the flow of oil hydraulic pump output.According to the effect of this oil sources device, this oil sources device can be applicable in other hydraulic control systems with little discharge capacity, high oil pressure equally.
As shown in Figure 2; this oil sources device can be applicable to hydraulic element testing property and all kinds of little discharge capacity; the hydraulic control system of high oil pressure; by fuel tank 51; filter 52 provides this device oil hydraulic pump 4 hydraulic oil; oil hydraulic pump 4 drives by motor 3; motor 3 is by frequency variator 2 and 1 control of speed setting device; the hydraulic oil output terminal of oil hydraulic pump 4 can connect unloading valve 53; proportional pressure control valve 54; band alarm filter device 55; all kinds of hydraulic element such as pressure gauge 57 and one-way valve 56 constitute hydraulic control system; motor 3 tachometer values that this hydraulic control system is set according to speed setting device 1 are adjusted the electric electromechanics source frequency; thereby press speed setting value and adjust motor speed; motor 3 drives float amount quantitative hydraulic pump 4 by setting the rotating speed rotation; and then the output flow hydraulic oil suitable with the setting rotating speed; this system makes oil hydraulic pump 4 off-loads by unloading valve 53; guarantee security of system; band alarm filter device 55 has guaranteed the turbidity test of this system's output oil sources; one-way valve 56 is used to protect oil hydraulic pump 4; the system fluid of preventing flows back to oil hydraulic pump 4 output oil ports; pressure gauge 57 is used to show oil hydraulic pump 4 outlet pressures; proportional pressure control valve 54 is used to adjust the outlet pressure of oil hydraulic pump 4; the requirement of system's oil sources is satisfied in one-way valve 56 output, is used for the test of all kinds of hydraulic element and provides little discharge capacity for hydraulic control system; the oil sources of high oil pressure.During this hydraulic control system work, at first unloading valve 53 electromagnet outage, proportional pressure control valve 54 valve port standard-sized sheets, starting under no load float amount quantitative hydraulic pump 4, set rotating speed to frequency variator 2 by 1 input of speed setting device, frequency variator 2 control motor 3 rotating speeds are for setting rotating speed, and motor 3 drives float amount quantitative hydraulic pump 4 by setting the rotating speed rotation, float amount quantitative hydraulic pump 4 passes through filter 52 oil suction from fuel tank 51, and exports in requisition for flow by one-way valve 56; Then, make unloading valve 53 electromagnet charged, and regulate proportional pressure control valve 54 and make system pressure reach test to need pressure, can observation system pressure from pressure gauge 57, the high pressure oil of float amount quantitative hydraulic pump 4 outputs is just by being with alarm filter device 55 and one-way valve 56 to enter test system like this; If test system needs flow to change, promptly need to change the flow of the high pressure oil of float amount quantitative hydraulic pump 4 outputs, only need to adjust the setting rotating speed of speed setting device 1, change motor 3 rotating speeds by frequency variator 2 and get final product.
Claims (2)
1. the small flow high pressure fuel source device of a stepless variable, it is characterized in that: this device comprises float amount quantitative hydraulic pump, motor, frequency variator and speed setting device, the output terminal of described speed setting device connects the input end of described frequency variator, the output terminal of described frequency variator connects the control input end of described motor, and the output shaft of described motor connects the input shaft of described float amount quantitative hydraulic pump.
2. the small flow high pressure fuel source device of stepless variable according to claim 1, it is characterized in that: this device also comprises tachometer, described tachometer connects the output shaft of described motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205802913U CN201843861U (en) | 2010-10-27 | 2010-10-27 | Small-flow high-pressure oil source device with stepless variable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205802913U CN201843861U (en) | 2010-10-27 | 2010-10-27 | Small-flow high-pressure oil source device with stepless variable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201843861U true CN201843861U (en) | 2011-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205802913U Expired - Fee Related CN201843861U (en) | 2010-10-27 | 2010-10-27 | Small-flow high-pressure oil source device with stepless variable |
Country Status (1)
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| CN (1) | CN201843861U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418825A (en) * | 2012-07-03 | 2013-12-04 | 太原科技大学 | Energy-saving control method of hydraulic system of hydraulic rolling shear |
| CN107605843A (en) * | 2017-10-12 | 2018-01-19 | 徐州徐工随车起重机有限公司 | A kind of electro-hydraulic leveling valve group of multifunctional working bucket |
-
2010
- 2010-10-27 CN CN2010205802913U patent/CN201843861U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418825A (en) * | 2012-07-03 | 2013-12-04 | 太原科技大学 | Energy-saving control method of hydraulic system of hydraulic rolling shear |
| CN107605843A (en) * | 2017-10-12 | 2018-01-19 | 徐州徐工随车起重机有限公司 | A kind of electro-hydraulic leveling valve group of multifunctional working bucket |
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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: 20110525 Termination date: 20151027 |
|
| EXPY | Termination of patent right or utility model |