CN214374490U - High-precision hydraulic oil effective volume elastic modulus detection device - Google Patents
High-precision hydraulic oil effective volume elastic modulus detection device Download PDFInfo
- Publication number
- CN214374490U CN214374490U CN202120570879.9U CN202120570879U CN214374490U CN 214374490 U CN214374490 U CN 214374490U CN 202120570879 U CN202120570879 U CN 202120570879U CN 214374490 U CN214374490 U CN 214374490U
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- oil tank
- detection device
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model provides an effective bulk modulus detection device of high accuracy hydraulic oil. The ultrasonic speed measuring device comprises an ultrasonic speed measuring unit, a closed pressurizing unit, a cooling unit and a heating unit; the ultrasonic speed measurement unit comprises a system oil tank, a main pump, a remote control unloading valve, an electromagnetic directional valve, a heat exchanger and a measured piece; an oil outlet of the main pump is connected with the electromagnetic directional valve through the remote control unloading valve; two working oil ports of the electromagnetic directional valve are respectively connected with two oil ports of a tested piece; the heat exchanger is arranged on an oil return pipeline of the electromagnetic directional valve and is connected with the cooling unit; two ends of the measured piece are respectively connected with a transmitting transducer and a receiving transducer; the closed pressurizing unit comprises an auxiliary oil tank and a vacuumizing and degassing assembly, wherein the auxiliary oil tank is communicated with the system oil tank; the heating unit is disposed in the system oil tank. The utility model discloses in being connected with transmitting transducer and receiving transducer at surveyed a both ends, can utilize the accurate measurement of ultrasonic wave to obtain the propagation velocity of fluid, and then calculate through the formula and obtain fluid bulk modulus of elasticity.
Description
Technical Field
The utility model relates to a hydraulic pressure detection device technical field, concretely relates to effective bulk modulus detection device of high accuracy hydraulic oil.
Background
At present, a hydraulic system is widely applied to various mechanical equipment, the effective volume elastic modulus of hydraulic oil used as a working medium represents the rigidity of the system, and the hydraulic system is one of important parameters influencing the dynamic performance of the system. Due to its compressibility, oil is often considered a spring in a hydraulic system. The elastic modulus of the oil is a dynamic quantity, has a plurality of influence factors and complicated change, and is a soft parameter which is difficult to determine. How to accurately obtain the elastic modulus parameters is always a hotspot of basic research in the hydraulic field, and has important significance on the design and analysis of hydraulic systems, particularly systems with high requirements on dynamic response and stability.
The elastic modulus of hydraulic oil is taken as an important physical parameter related research of a hydraulic control system, and is long-paid attention by scholars at home and abroad, a great deal of work is carried out, and important progress is achieved. In the prior art, researchers have tried to measure the bulk modulus of elasticity of oil liquid and change the pressure to obtain the change characteristic of the modulus of elasticity.
In summary, a high-precision device for detecting the effective bulk modulus of hydraulic oil is urgently needed to solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an effective bulk modulus detection device of high accuracy hydraulic oil to solve the propagation velocity measuring problem of pressure wave in fluid.
In order to achieve the purpose, the utility model provides a high-precision hydraulic oil effective volume elastic modulus detection device, which comprises an ultrasonic speed measurement unit, a closed pressurizing unit, a cooling unit and a heating unit;
the ultrasonic speed measurement unit comprises a system oil tank, a main pump, a remote control unloading valve, an electromagnetic directional valve, a heat exchanger and a measured piece; an oil outlet of the main pump is connected with an oil inlet of the electromagnetic directional valve through the remote control unloading valve; two working oil ports of the electromagnetic directional valve are respectively connected with a first oil port and a second oil port of the tested piece; the heat exchanger is arranged on an oil return pipeline of the electromagnetic directional valve; the heat exchanger is connected with the cooling unit; the two ends of the tested piece are respectively connected with a transmitting transducer and a receiving transducer;
the closed pressurizing unit comprises an auxiliary oil tank communicated with the system oil tank, a vacuumizing degassing assembly arranged at the top of the system oil tank and a first stop valve arranged at the bottom of the system oil tank; the heating unit is disposed in the system oil tank.
Further, the heating unit includes a heating oil pump, a first electromagnetic valve, and a first relief valve; an oil outlet of the heating oil pump is communicated with an oil inlet of the first electromagnetic valve; an oil outlet of the first electromagnetic valve returns oil to a system oil tank; the first relief valve is disposed between the heating oil pump and the first solenoid valve.
Further, the cooling unit comprises a cooling water pump, a second stop valve, a second electromagnetic valve, a third electromagnetic valve and a first one-way valve; the water outlet of the cooling water pump is communicated with the water inlet of the second stop valve; the water outlet of the second stop valve is respectively communicated with the water inlets of the second electromagnetic valve and the third electromagnetic valve, the water outlet of the second electromagnetic valve is communicated with the heat exchanger, and the water outlet of the third electromagnetic valve returns water to the cooling water tank; the first one-way valve is arranged between the water outlets of the second electromagnetic valve and the third electromagnetic valve.
Furthermore, a first temperature sensor and a pressure sensor are connected to the measured piece.
Further, a second temperature sensor and a liquid level sensor are arranged in the system oil tank.
Furthermore, the design of the system oil tank pressing force container adopts a fully-closed cylindrical structure; and the middle upper part of the system oil tank is provided with an observation window for monitoring liquid level and bubbles in oil.
Furthermore, a second safety valve is arranged on the system oil tank to prevent the oil tank from being over-pressurized.
Further, the vacuumizing and degassing assembly comprises a vacuum pump, a filter and an electric ball valve which are connected in sequence; the vacuum pump is connected with the external atmosphere, and the electric ball valve is connected with the system oil tank.
Furthermore, two working oil ports of the electromagnetic directional valve are respectively connected with a first oil port and a second oil port of the tested piece through two second one-way valves.
Further, the second end of the tested piece is connected with the remote control unloading valve through the hydraulic control one-way valve.
Use the technical scheme of the utility model, following beneficial effect has:
(1) the utility model discloses in being connected with transmitting transducer and receiving transducer at surveyed a both ends, can utilize the accurate measurement of ultrasonic wave to obtain the propagation velocity of fluid, and then calculate through the formula and obtain fluid bulk modulus of elasticity.
(2) The utility model discloses in, the design has heating element and cooling unit, to the temperature accurate control of hydraulic oil, and temperature 0-90 is adjustable, and the accuracy control is at 1 ℃ plus or minus, and fluid in the measured piece is interacted with fluid in the system oil tank in the testing process, has also realized control to the fluid temperature in the measured piece simultaneously.
(3) The utility model discloses in be equipped with a plurality of pressure sensor and temperature sensor, temperature, pressure in the measured piece can all carry out the precision measurement, and pressure can be realized adjustable at 0-35MPa, and the precision can calculate fluid bulk modulus under different temperatures, pressure at 1.
(4) The utility model discloses in, the system oil tank adopts seal structure, has set up evacuation degassing unit simultaneously to greatly reduced external atmospheric environment to test structure's influence. The propagation speed of the pressure wave in the oil can be tested at different gas contents.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic structural diagram of a high-precision hydraulic oil effective bulk modulus detection device;
FIG. 2 is a schematic structural view of a closed type pressurizing unit;
FIG. 3 is a schematic diagram of an ultrasonic velocimetry unit;
the system comprises a system oil tank 1, a system oil tank 2, a main pump 3, a remote control unloading valve 4, an electromagnetic directional valve 5, a heat exchanger 6, a tested part 7, a transmitting transducer 8, a receiving transducer 9, an auxiliary oil tank 10, a first stop valve 11, a heating oil pump 12, a first electromagnetic valve 13, a first safety valve 14, a cooling water pump 15, a second stop valve 16, a second electromagnetic valve 17, a third electromagnetic valve 18, a first one-way valve 19, a cooling water tank 20, a first temperature sensor 21, a pressure sensor 22, a second temperature sensor 23, a liquid level sensor 24, a second safety valve 25, a vacuum pump 26, a filter 27, an electric ball valve 28, a second one-way valve 29 and a hydraulic control one-way valve.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1 to 3, a high-precision hydraulic oil effective volume elastic modulus detection device includes an ultrasonic speed measurement unit, a closed pressurization unit, a cooling unit and a heating unit; the tested piece of the implementation preferably adopts a hydraulic steel pipe.
The ultrasonic speed measurement unit comprises a system oil tank 1, a main pump 2, a remote control unloading valve 3, an electromagnetic directional valve 4, a heat exchanger 5 and a measured piece 6; an oil outlet of the main pump 2 is connected with an oil inlet of an electromagnetic directional valve 4 through a remote control unloading valve 3; two working oil ports of the electromagnetic directional valve 4 are respectively connected with a first end oil port and a second end oil port of the tested piece 6 through two second one-way valves 28; the heat exchanger 5 is arranged on an oil return pipeline of the electromagnetic directional valve 4; the heat exchanger 5 is connected with the cooling unit; the two ends of the tested piece 6 are respectively connected with a transmitting transducer 7 and a receiving transducer 8; the second end of the tested piece 6 is connected with the remote control unloading valve 3 through a hydraulic control one-way valve 29.
The closed pressurizing unit comprises an auxiliary oil tank 9 communicated with the system oil tank 1, a vacuumizing degassing assembly arranged at the top of the system oil tank and a first stop valve 10 arranged at the bottom of the system oil tank 1; the heating unit is disposed in the system oil tank 1. The design of the system oil tank 1 pressing force container adopts a fully-closed cylindrical structure; and an observation window is arranged at the middle upper part of the system oil tank 1 and used for monitoring liquid level and bubbles in oil. A second safety valve 24 is provided in the system tank 1 to prevent tank overpressure. The vacuumizing and degassing assembly comprises a vacuum pump 25, a filter 26 and an electric ball valve 27 which are connected in sequence; the vacuum pump 25 is connected to the outside atmosphere, and the electric ball valve 27 is connected to the system oil tank 1.
The heating unit comprises a heating oil pump 11, a first electromagnetic valve 12 and a first safety valve 13; an oil outlet of the heating oil pump 11 is communicated with an oil inlet of the first electromagnetic valve 12; an oil outlet of the first electromagnetic valve 12 returns oil to the system oil tank 1; a first relief valve 13 is provided between the heating oil pump 11 and the first electromagnetic valve 12.
The cooling unit comprises a cooling water pump 14, a second stop valve 15, a second electromagnetic valve 16, a third electromagnetic valve 17 and a first one-way valve 18; the water outlet of the cooling water pump 14 is communicated with the water inlet of the second stop valve 15; the water outlet of the second stop valve 15 is respectively communicated with the water inlets of a second electromagnetic valve 16 and a third electromagnetic valve 17, the water outlet of the second electromagnetic valve 16 is communicated with the heat exchanger 5, and the water outlet of the third electromagnetic valve 17 returns water to the cooling water tank 19; a first check valve 18 is provided between the outlets of the second solenoid valve 16 and the third solenoid valve 17.
The first temperature sensor 20 and the pressure sensor 21 are connected to the measured object 6. A second temperature sensor 22 and a liquid level sensor 23 are arranged in the system oil tank 1. The temperature, pressure and liquid level monitoring of the whole device is realized.
The speed measurement principle of the ultrasonic speed measurement unit is shown in fig. 3. When the system is powered on, the transmitting circuit excites the transmitting transducer to transmit ultrasonic waves, the ultrasonic waves are received by the receiving transducer after passing through the hydraulic system, effective signals containing ultrasonic echo information are obtained through the amplifying circuit, the peak detection circuit, the filter circuit and the level detection circuit, and the signals are simultaneously sent to the gate circuit and the counter of the industrial computer. And (3) exciting a new round of circulation by using a gate circuit, recording the circulation times by using an industrial computer counter, and after the timing time of the industrial computer reaches the set time, giving a signal to the gate circuit by the industrial computer to enable the gate circuit to output a low level to stop the transmission of the ultrasonic wave, ending the circulation, and displaying the circulation times. The single ultrasound cycle time is calculated by the industrial computer and the distance between the receiving transducer and the transmitting transducer is known, so that the propagation velocity of the ultrasound can be calculated.
The timing cycle counting method is that ultrasonic echo signals received by the ultrasonic transducer are sent to the single chip microcomputer control circuit after being shaped within a certain time, the single chip microcomputer control circuit generates trigger signals for exciting ultrasonic emission to carry out a new cycle of cycle, and the cycle is finished when a preset time value is reached. And finally, obtaining the propagation time of the ultrasonic waves in the hydraulic system according to the preset time and the cycle times.
In a hydraulic system, if the system working condition and the physical characteristics of a pipeline are fixed, the propagation speed C and the effective bulk elastic modulus beta of pressure waves or ultrasonic waves in oil liquideThe oil density ρ is in the following relationship:
therefore, the propagation speed of the ultrasonic wave in the oil is measured, and the elastic modulus value can be calculated.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A high-precision hydraulic oil effective volume elastic modulus detection device is characterized by comprising an ultrasonic speed measurement unit, a closed pressurization unit, a cooling unit and a heating unit;
the ultrasonic speed measurement unit comprises a system oil tank (1), a main pump (2), a remote control unloading valve (3), an electromagnetic directional valve (4), a heat exchanger (5) and a measured piece (6); an oil outlet of the main pump (2) is connected with an oil inlet of the electromagnetic directional valve (4) through the remote control unloading valve (3); two working oil ports of the electromagnetic directional valve (4) are respectively connected with a first end oil port and a second end oil port of the tested piece (6); the heat exchanger (5) is arranged on an oil return pipeline of the electromagnetic directional valve (4); the heat exchanger (5) is connected with the cooling unit; two ends of the tested piece (6) are respectively connected with a transmitting transducer (7) and a receiving transducer (8);
the closed pressurizing unit comprises an auxiliary oil tank (9) communicated with the system oil tank (1), a vacuumizing and degassing assembly arranged at the top of the system oil tank and a first stop valve (10) arranged at the bottom of the system oil tank (1); the heating unit is arranged in the system oil tank (1).
2. A high accuracy hydraulic oil effective bulk modulus detecting device according to claim 1, characterized in that said heating unit comprises a heating oil pump (11), a first electromagnetic valve (12) and a first relief valve (13); an oil outlet of the heating oil pump (11) is communicated with an oil inlet of the first electromagnetic valve (12); an oil outlet of the first electromagnetic valve (12) returns oil to the system oil tank (1); a first relief valve (13) is provided between the heating oil pump (11) and the first solenoid valve (12).
3. A high-precision hydraulic oil effective volume elastic modulus detection device as claimed in claim 2, wherein the cooling unit comprises a cooling water pump (14), a second stop valve (15), a second electromagnetic valve (16), a third electromagnetic valve (17) and a first one-way valve (18); the water outlet of the cooling water pump (14) is communicated with the water inlet of the second stop valve (15); a water outlet of the second stop valve (15) is respectively communicated with water inlets of a second electromagnetic valve (16) and a third electromagnetic valve (17), a water outlet of the second electromagnetic valve (16) is communicated with the heat exchanger (5), and a water outlet of the third electromagnetic valve (17) returns water to the cooling water tank (19); the first one-way valve (18) is arranged between the water outlets of the second electromagnetic valve (16) and the third electromagnetic valve (17).
4. A high-precision hydraulic oil effective volume elastic modulus detection device as claimed in any one of claims 1 to 3, wherein a first temperature sensor (20) and a pressure sensor (21) are connected to the piece to be detected (6).
5. A high-precision hydraulic oil effective volume elastic modulus detection device as claimed in claim 4, characterized in that a second temperature sensor (22) and a liquid level sensor (23) are arranged in the system oil tank (1).
6. The high-precision hydraulic oil effective volume elastic modulus detection device is characterized in that a system oil tank (1) is designed as a pressing force container and adopts a fully-closed cylindrical structure; and the middle upper part of the system oil tank (1) is provided with an observation window for monitoring liquid level and bubbles in oil.
7. A high accuracy hydraulic oil effective bulk modulus detection device according to claim 6, characterized in that a second relief valve (24) is configured on the system oil tank (1) to prevent the tank from overpressure.
8. A high-precision hydraulic oil effective bulk modulus detection device as claimed in claim 7, wherein the vacuum pumping and degassing assembly comprises a vacuum pump (25), a filter (26) and an electric ball valve (27) which are connected in sequence; the vacuum pump (25) is connected with the external atmosphere, and the electric ball valve (27) is connected with the system oil tank (1).
9. The high-precision hydraulic oil effective volume elastic modulus detection device as claimed in any one of claims 5 to 8, wherein two working oil ports of the electromagnetic directional valve (4) are respectively connected with the first end oil port and the second end oil port of the tested piece (6) through two second one-way valves (28).
10. A high-precision hydraulic oil effective bulk modulus detection device as claimed in claim 9, wherein the second end of the tested piece (6) is connected with the remote control unloading valve (3) through a pilot-controlled check valve (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120570879.9U CN214374490U (en) | 2021-03-22 | 2021-03-22 | High-precision hydraulic oil effective volume elastic modulus detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120570879.9U CN214374490U (en) | 2021-03-22 | 2021-03-22 | High-precision hydraulic oil effective volume elastic modulus detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214374490U true CN214374490U (en) | 2021-10-08 |
Family
ID=77972222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120570879.9U Expired - Fee Related CN214374490U (en) | 2021-03-22 | 2021-03-22 | High-precision hydraulic oil effective volume elastic modulus detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214374490U (en) |
-
2021
- 2021-03-22 CN CN202120570879.9U patent/CN214374490U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203785731U (en) | Device for measuring volume of irregular enclosed container | |
| CN105403265A (en) | Automatic zero drift-correction ultrasound water meter and correction method | |
| CN105738028A (en) | Measurement method for fluid pressure in non-intrusive pipeline | |
| CN100439895C (en) | Oil elastic modulus detector based on volume elastic modulus definition | |
| CN104897514A (en) | Device for measuring danks surface gas adsorption and danks desorption curves | |
| CN101603846A (en) | Target type flowmeter of non-contact type displacement sensor | |
| CN102102511B (en) | Underground ultrasonic Doppler flow measurement device and measurement method | |
| CN214374490U (en) | High-precision hydraulic oil effective volume elastic modulus detection device | |
| CN205984039U (en) | Theoretical mechanics teaching aid | |
| CN208333626U (en) | A kind of New fluid level gauge calibrating installation | |
| CN2901296Y (en) | Oil-liquid elasticity modulus detector based on volume elasticity modules definition | |
| CN1469106A (en) | Non-insertion method of measuring fluid pressure and flow rate inside pipe | |
| CN208206239U (en) | A kind of ultrasonic water level measuring arrangement | |
| CN207848066U (en) | A kind of spring safety valve debugging apparatus | |
| CN202522583U (en) | Resistance strain transducer type device for detecting current speed in pipeline | |
| CN102493973A (en) | Wide-range internal leakage detection device for hydraulic component | |
| CN203083885U (en) | Novel outside-measuring-method hydrostatic test device | |
| CN209841608U (en) | Irrigation water viscosity coefficient detection device based on magnetostrictive displacement sensor | |
| CN201819763U (en) | Electric ultrahigh pressure piston type pressure gauge | |
| CN209605906U (en) | A kind of small blind area liquidometer of minor diameter | |
| CN105043647B (en) | Fluid pressure monitoring system in a kind of closed container | |
| US4739663A (en) | Acoustically monitored manometer | |
| CN201532232U (en) | Buoy liquidometer of barrel elastic element | |
| KR101379934B1 (en) | Apparatus and method for measuring the thickness of the scale in a pipe | |
| CN203534667U (en) | Non-contact liquid level detection apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211008 |