CN112268720A - Oil filtering efficiency test device and method for commercial vehicle air dryer - Google Patents
Oil filtering efficiency test device and method for commercial vehicle air dryer Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 60
- 238000001914 filtration Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 238000004088 simulation Methods 0.000 claims abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 230000008929 regeneration Effects 0.000 claims description 5
- 238000011069 regeneration method Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims 1
- 238000010998 test method Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 95
- 239000010705 motor oil Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
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Abstract
The invention discloses a commercial vehicle air dryer oil filtering efficiency test device and a method thereof, wherein the device comprises an air source, a pressure reducing valve, an air storage tank, a first pressure gauge, a stop valve, a flow regulation display device, a compressed air heater, an oil atomizer, an air dryer, a simulation air consumption device, a temperature detection display device, a temperature-resistant compressed air oil content detection display device, a second pressure gauge and a compressed air oil content detection display device; a first four-way joint is arranged between the oil atomizer and the air dryer; and a second four-way joint is arranged between the air dryer and the simulated gas consumption device. The oil filtering efficiency test device and the oil filtering efficiency test method for the commercial vehicle air dryer can control and adjust the air inlet flow, pressure, temperature and oil content of the air dryer according to test requirements, detect the oil content of compressed air passing through the air inlet and the air outlet of the air dryer in real time, obtain accurate oil filtering efficiency of the air dryer and effectively verify the oil filtering performance of a product.
Description
Technical Field
The invention belongs to the technical field of automobile part tests, and particularly relates to a commercial vehicle air dryer oil filtering efficiency test device and a commercial vehicle air dryer oil filtering efficiency test method.
Background
The oil filtering efficiency test device for the air dryer comprises a standard oil blow-by air compressor, the dryer, an engine oil collecting device and an air storage cylinder, engine oil collected by the engine oil collecting device is tested in a manner of weighing by a balance or measuring the volume by a measuring cup, only the difference of oil filtering effects of the dryer can be compared relatively, the test cost is high, the test efficiency is low, and the error of a test value is large.
In addition, a standard oil blow-by air compressor needs to be specially made, the oil blow-by amount is not suitable to be controlled after the air compressor is worn, and the use cost is high; the engine oil collected by the engine oil collecting device at the outlet of the dryer is weighed by a balance or is measured by a measuring cup, and only the difference of oil filtering effects of different drying tank dryers can be compared, so that the relative value of the oil filtering efficiency is obtained, and the absolute value of the oil filtering efficiency cannot be accurately obtained.
Aiming at the problems, a set of air dryer oil filtering efficiency test device and method which are simple in structure, convenient to use and accurate in test need to be established.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provides a commercial vehicle air dryer oil filtering efficiency test device and a commercial vehicle air dryer oil filtering efficiency test method.
In order to achieve the purpose, the invention adopts the technical scheme that: a commercial vehicle air dryer oil filtering efficiency test device comprises an air source, a pressure reducing valve, an air storage tank, a first pressure gauge, a stop valve, a flow regulation display device, a compressed air heater, an oil atomizer, an air dryer, a simulated air consumption device, a temperature detection display device, a temperature-resistant compressed air oil content detection display device, a second pressure gauge and a compressed air oil content detection display device;
the air source, the pressure reducing valve, the air storage tank, the first pressure gauge, the stop valve, the flow regulation display device, the compressed air heater, the oil atomizer, the air dryer and the simulated air consumption device are sequentially connected;
a first four-way joint is arranged between the oil atomizer and the air dryer, a first interface of the first four-way joint is connected with the oil atomizer, a second interface of the first four-way joint is connected with the air dryer, a third interface of the first four-way joint is connected with a temperature detection display device, and a fourth interface of the first four-way joint is connected with a temperature-resistant compressed air oil-containing detection display device;
the oil-containing simulation system is characterized in that a second four-way joint is arranged between the air dryer and the simulation gas consumption device, a first port of the second four-way joint is connected with the air dryer, a second port of the second four-way joint is connected with the simulation gas consumption device, a third port of the second four-way joint is connected with a second pressure gauge, and a fourth port of the second four-way joint is connected with the compressed air oil-containing detection display device.
In a preferred embodiment, the compressed air heater is a temperature-resistant and pressure-resistant electric heater, and the compressed air heater can keep a constant temperature value after being heated to a set temperature.
Preferably, the simulated gas consumption device comprises a ball valve and a throttle valve, and the ball valve and the throttle valve are connected through a connecting pipe.
Preferably, the fourth interface of the first four-way joint is connected with the temperature-resistant compressed air oil-containing detection display device through a stainless steel pipe.
Preferably, the second port of the second four-way joint is connected with the simulated gas consumption device through a nylon pipe.
In a preferred embodiment, the fourth port of the second four-way joint is connected with the compressed air oil-containing detection display device through a stainless steel pipe.
The invention also provides a method for testing by using the oil filtering efficiency testing device of the air dryer of the commercial vehicle, which comprises the following steps:
1) compressed air is input through an air source, and a pressure reducing valve is adjusted, so that the pressure displayed by a first pressure gauge at the rear end of the air storage tank is higher than the cut-off pressure of the air dryer;
2) opening a stop valve, simultaneously opening a ball valve of a simulated gas consumption device, and enabling the flow to reach a test required flow value of compressed air at an inlet of an air dryer through a flow regulation display device;
3) starting the heating function of the compressed air heater to heat the compressed air until the temperature value of the temperature detection display device at the third interface position of the first four-way joint reaches the test required temperature value of the compressed air at the inlet of the air dryer;
4) adjusting an adjusting valve on the oil atomizer until the oil content display value on the temperature-resistant compressed air oil content detection display device at the fourth interface position of the first four-way joint reaches the oil content value a required by the test of compressed air at the inlet of the air dryer1；
5) The compressed air oil content detection display device at the fourth port position of the second four-way joint at the outlet position of the air dryer synchronously displays the oil content value a of the real-time compressed air2Calculating the oil filtering efficiency of the air dryer;
6) and adjusting a throttle valve in the simulated gas consumption device to control the consumption of compressed air at the outlet of the air dryer, so that the air dryer realizes the periodic cycle of air inlet, unloading, regeneration and exhaust, and the oil filtering efficiency after the durability test of the air dryer can be obtained after the cycle times required by the test are reached.
Preferably, in the step 5), the oil filtering efficiency K of the air dryer is calculated by the following formula
K＝(a1-a2)÷a1×100％
In the formula, a1The oil content value required for the test of compressed air at the inlet of an air dryer is mg/m3；a2Synchronously displaying real-time oil content value a of compressed air for oil content detection and display device of compressed air2In units of mg/m3。
Compared with the prior art, the invention has the beneficial effects that:
firstly, the oil filtering efficiency test device for the air dryer of the commercial vehicle can control and adjust (air inlet flow, pressure, temperature and oil content of the air dryer) according to test requirements, real-time detection is carried out on the oil content of compressed air passing through the air inlet and the air outlet of the air dryer, accurate oil filtering efficiency of the air dryer is obtained, and oil filtering performance of a product is effectively verified.
Secondly, the oil filtering efficiency test device of the air dryer of the commercial vehicle is simple in structure, convenient to use and accurate in test, the oil filtering performance of a product is effectively verified, the test period is shortened, and the test cost is reduced.
Thirdly, the compressed air heater in the oil filtering efficiency test device of the air dryer of the commercial vehicle is a temperature-resistant and pressure-resistant electric heater, the temperature can be set at will, the temperature value is kept constant, the inlet of the oil atomizer is connected with the outlet of the compressed air heater, the oil atomizer atomizes the engine oil and injects the atomized engine oil into the compressed air, and the dropping amount of the engine oil in the oil cup of the oil atomizer can be adjusted through the adjusting valve on the oil atomizer.
Fourthly, the simulated gas consumption device in the oil filtering efficiency test device of the air dryer of the commercial vehicle comprises a ball valve, a throttle valve and a connecting pipeline, and the consumption of compressed air is controlled by adjusting the throttle valve, so that the air dryer can perform the action cycle of air inlet, unloading, regeneration and exhaust.
Drawings
FIG. 1 is a schematic structural diagram of an oil filtering efficiency test device of a commercial vehicle air dryer of the present invention;
in the figure, 1-air source, 2-pressure reducing valve, 3-air storage tank, 4-first pressure gauge, 5-stop valve, 6-flow regulation display device, 7-compressed air heater, 8-oil atomizer, 9-air dryer, 10-simulation air consumption device, 10.1-ball valve, 10.2-throttle valve, 11-temperature detection display device, 12-temperature-resistant compressed air oil content detection display device, 13-second pressure gauge, 14-compressed air oil content detection display device, 15-first four-way joint, 15.1-first interface, 15.2-second interface, 15.3-third interface, 15.4-fourth interface, 16-second four-way joint, 16.1-first port, 16.2-second port, 16.3-third port, 16.4-fourth port.
Detailed Description
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.
The oil filtering efficiency test device for the air dryer of the commercial vehicle shown in fig. 1 comprises an air source 1, a pressure reducing valve 2, an air storage tank 3, a first pressure gauge 4, a stop valve 5, a flow regulation display device 6, a compressed air heater 7, an oil atomizer 8, an air dryer 9, a simulated air consumption device 10, a temperature detection display device 11, a temperature-resistant compressed air oil content detection display device 12, a second pressure gauge 13 and a compressed air oil content detection display device 14; the air source 1, the pressure reducing valve 2, the air storage tank 3, the first pressure gauge 4, the stop valve 5, the flow regulation display device 6, the compressed air heater 7, the oil atomizer 8, the air dryer 9 and the simulated air consumption device 10 are sequentially connected;
a first four-way joint 15 is arranged between the oil sprayer 8 and the air dryer 9, a first interface 15.1 of the first four-way joint 15 is connected with the oil sprayer 8, a second interface 15.2 of the first four-way joint 15 is connected with the air dryer 9, a third interface 15.3 of the first four-way joint 15 is connected with a temperature detection display device 11, and a fourth interface 15.4 of the first four-way joint 15 is connected with a temperature-resistant compressed air oil content detection display device 12;
a second four-way joint 16 is arranged between the air dryer 9 and the simulated gas consumption device 10, a first port 16.1 of the second four-way joint 16 is connected with the air dryer 9, a second port 16.2 of the second four-way joint 16 is connected with the simulated gas consumption device 10, a third port 16.3 of the second four-way joint 16 is connected with a second pressure gauge 13, and a fourth port 16.4 of the second four-way joint 16 is connected with a compressed air oil content detection display device 14.
The compressed air heater 7 is a temperature-resistant and pressure-resistant electric heater, and the compressed air heater 7 can keep a constant temperature value after being heated to a set temperature. The simulated gas consumption device 10 comprises a ball valve 10.1 and a throttle valve 10.2, and the ball valve 10.1 is connected with the throttle valve 10.2 through a connecting pipe. And the fourth interface 15.4 of the first four-way joint 15 is connected with the temperature-resistant compressed air oil-containing detection display device 12 through a stainless steel pipe. The second port 16.2 of the second four-way joint 16 is connected with the simulated gas consumption device 10 through a nylon pipe. And the fourth port 16.4 of the second four-way joint 16 is connected with the compressed air oil-containing detection display device 14 through a stainless steel pipe.
In the embodiment, an inlet of a pressure reducing valve 2 is connected with an air source 1, an outlet of the pressure reducing valve is connected with an inlet of an air storage tank 3, an outlet of the air storage tank 3 is provided with a pressure gauge 4, an outlet of the pressure gauge 4 is provided with a stop valve 5, the air inlet pressure can be adjusted through the pressure reducing valve 2, the stop valve 5 is used for cutting off input of compressed air, an outlet of the stop valve 5 is connected with an inlet of a flow adjusting and displaying device 6, an outlet of the flow adjusting and displaying device 6 is connected to an inlet of; the compressed air heater 7 is a temperature-resistant and pressure-resistant electric heater, the temperature can be set at will, the temperature value is kept constant, the inlet of the oil atomizer 8 is connected with the outlet of the compressed air heater 7, the oil atomizer 8 atomizes the engine oil and injects the atomized engine oil into the compressed air, and the dropping amount of the engine oil in the oil cup of the oil atomizer can be adjusted by the adjusting valve on the oil atomizer; the port 151 of the first four-way joint is arranged at the outlet of the oil atomizer, the third port 15.3 of the first four-way joint 15 is directly connected with the temperature detection display device 11, the temperature detection display device 11 can detect and display the temperature value of the compressed air entering the inlet of the air dryer to ensure the requirement of the inlet air temperature in the test condition, the fourth port 15.4 of the first four-way joint 15 is connected with the temperature-resistant compressed air oil-containing detection display device 12 through a stainless steel pipe, the temperature-resistant compressed air oil-containing detection display device 12 mainly comprises a sampling probe and a digital display system, the oil content mg/m3 of the compressed air can be detected and displayed on line in real time, and the second port 15.2 of the first four-way joint 15 is connected with the inlet; a first port 16.1 of a second four-way joint 16 is arranged at an outlet of the air dryer 9, a third port 16.3 of the second four-way joint 16 is provided with a second pressure gauge 13, a fourth port 16.4 of the second four-way joint 16 is connected with a compressed air oil content detection display device 14 through a stainless steel pipe, and a second port 16.2 of the second four-way joint 16 is connected with the simulated gas consumption device 10 through a nylon pipe; the simulated gas consumption device 10 comprises a ball valve 10.1 and a throttle valve 10.2, the ball valve 10.1 is connected with the throttle valve 10.2 through a connecting pipe, the consumption of compressed air is controlled by adjusting the throttle valve, the air dryer can perform the action cycle of air inlet, unloading, regeneration and exhaust, and other pipelines which are not marked are nylon pipes.
The oil filtering efficiency test device for the air dryer of the commercial vehicle can control and adjust the air inlet flow, pressure, temperature and oil content of the air dryer according to test requirements, and detect the oil content of compressed air passing through the air inlet and the air outlet of the air dryer in real time, so that accurate oil filtering efficiency of the air dryer is obtained, and the oil filtering performance of a product is effectively verified. The testing device is simple in structure, convenient to use and accurate in testing, the oil filtering performance of a product is effectively verified, the testing period is shortened, and the testing cost is reduced.
The invention also provides a method for testing by using the oil filtering efficiency testing device of the air dryer of the commercial vehicle, which comprises the following steps:
1) compressed air is input through an air source 1, a pressure reducing valve 2 is adjusted, and a first pressure gauge 4 at the rear end of an air storage tank 3 displays that the pressure is higher than the cut-off pressure of an air dryer 9;
2) the stop valve 5 is opened, the ball valve 10.1 of the simulated gas consumption device 10 is opened at the same time, and the flow rate reaches the test required flow rate value (set as 510L/min in the embodiment) of the compressed air at the inlet of the air dryer 9 through the flow rate adjusting and displaying device 6;
3) starting the heating function of the compressed air heater 7, heating the compressed air until the temperature value of the temperature detection display device 11 at the position of the third interface 15.3 of the first four-way joint 15 reaches the test required temperature value (set to 65 ℃ in the embodiment) of the compressed air at the inlet of the air dryer 9;
4) adjusting an adjusting valve on the oil atomizer 8 until the oil content display value on the temperature-resistant compressed air oil content detection display device 12 at the position of the fourth interface 15.4 of the first four-way joint 15 reaches the oil content value a required by the test of the compressed air at the inlet of the air dryer 91(in the present example, 40mg/m is set3)；
5) The oil content detection and display device 14 of the compressed air at the fourth port 16.4 of the second four-way joint 16 at the outlet of the air dryer 9 synchronously displays the oil content value a of the real-time compressed air2(found in this example to be 5mg/m3) The oil filtration efficiency of the air dryer 9 is calculated, and the oil filtration efficiency K of the air dryer 9 is calculated by the following formula (a ═ K ═ c)1-a2)÷a1X is 100%; in the embodiment, the oil filtering efficiency K is 87.5%;
6) and adjusting a throttle valve 10.2 in the simulated gas consumption device 10 to control the consumption of compressed air at the outlet of the air dryer 9, so that the air dryer 9 realizes the periodic cycle of air inlet, unloading, regeneration and exhaust, and the oil filtering efficiency after the durability test of the air dryer 9 can be obtained after the test required cycle times are reached.
The above description is only for the specific embodiments of the present invention, and it should be noted that the remaining detailed descriptions are related to the prior art, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a commercial car air dryer oil strain efficiency test device which characterized in that: the device comprises an air source (1), a pressure reducing valve (2), an air storage tank (3), a first pressure gauge (4), a stop valve (5), a flow regulation display device (6), a compressed air heater (7), an oil atomizer (8), an air dryer (9), a simulated air consumption device (10), a temperature detection display device (11), a temperature-resistant compressed air oil content detection display device (12), a second pressure gauge (13) and a compressed air oil content detection display device (14);
the air source (1), the pressure reducing valve (2), the air storage tank (3), the first pressure gauge (4), the stop valve (5), the flow regulation display device (6), the compressed air heater (7), the oil mist device (8), the air dryer (9) and the simulated air consumption device (10) are sequentially connected;
a first four-way joint (15) is arranged between the oil sprayer (8) and the air dryer (9), a first interface (15.1) of the first four-way joint (15) is connected with the oil sprayer (8), a second interface (15.2) of the first four-way joint (15) is connected with the air dryer (9), a third interface (15.3) of the first four-way joint (15) is connected with the temperature detection display device (11), and a fourth interface (15.4) of the first four-way joint (15) is connected with the temperature-resistant compressed air oil-containing detection display device (12);
set up second four-way connection (16) between air dryer (9) and the simulation gas consumption device (10), first port (16.1) and air dryer (9) of second four-way connection (16) are connected, second port (16.2) and the simulation of second four-way connection (16) are connected with gas consumption device (10), third port (16.3) and the second manometer (13) of second four-way connection (16) are connected, fourth port (16.4) and the oily detection display device of compressed air (14) of second four-way connection (16) are connected.
2. The commercial vehicle air dryer oil filtration efficiency test device of claim 1, characterized in that: the compressed air heater (7) is a temperature-resistant and pressure-resistant electric heater, and the compressed air heater (7) can keep a constant temperature value after being heated to a set temperature.
3. The commercial vehicle air dryer oil filtration efficiency test device of claim 2, characterized in that: the simulated gas consumption device (10) comprises a ball valve (10.1) and a throttle valve (10.2), and the ball valve (10.1) is connected with the throttle valve (10.2) through a connecting pipe.
4. The commercial vehicle air dryer oil filtration efficiency test device of claim 3, characterized in that: and a fourth interface (15.4) of the first four-way joint (15) is connected with the temperature-resistant compressed air oil-containing detection display device (12) through a stainless steel pipe.
5. The commercial vehicle air dryer oil filtration efficiency test device of claim 4, characterized in that: and the second port (16.2) of the second four-way joint (16) is connected with the simulated gas consumption device (10) through a nylon pipe.
6. The commercial vehicle air dryer oil filtration efficiency test device of claim 5, characterized in that: and a fourth port (16.4) of the second four-way joint (16) is connected with the compressed air oil-containing detection display device (14) through a stainless steel pipe.
7. A method for testing the oil filtering efficiency of the air dryer of the commercial vehicle according to any one of claims 1-6, is characterized in that: the method comprises the following steps:
1) compressed air is input through an air source (1), a pressure reducing valve (2) is adjusted, and the pressure displayed by a first pressure gauge (4) at the rear end of an air storage tank (3) is higher than the cut-off pressure of an air dryer (9);
2) opening a stop valve (5), simultaneously opening a ball valve (10.1) of a simulated gas consumption device (10), and enabling the flow to reach a test required flow value of compressed air at an inlet of an air dryer (9) through a flow regulation display device (6);
3) starting the heating function of the compressed air heater (7) to heat the compressed air until the temperature value of the temperature detection display device (11) at the position of the third interface (15.3) of the first four-way joint (15) reaches the test required temperature value of the compressed air at the inlet of the air dryer (9);
4) adjusting an adjusting valve on the oil atomizer (8) until the oil content display value on the temperature-resistant compressed air oil content detection display device (12) at the position of a fourth interface (15.4) of the first four-way joint (15) reaches the oil content value a required by the test of the compressed air at the inlet of the air dryer (9)1；
5) The compressed air oil content detection display device (14) at the fourth port (16.4) position of the second four-way joint (16) at the outlet position of the air dryer (9) synchronously displays the real-time oil content value a of the compressed air2Calculating the oil filtering efficiency of the air dryer (9);
6) and adjusting a throttle valve (10.2) in the simulated gas consumption device (10) to control the consumption of compressed air at the outlet of the air dryer (9), so that the air dryer (9) realizes the periodic cycle of air inlet, unloading, regeneration and exhaust, and the oil filtering efficiency after the durability test of the air dryer (9) can be obtained after the test required cycle times are reached.
8. The method of claim 7, wherein: in the step 5), the oil filtering efficiency K of the air dryer (9) is calculated by the following formula
K＝(a1-a2)÷a1×100％
In the formula, a1The oil content value required for the test of compressed air at the inlet of the air dryer (9) is mg/m3；a2The oil content value a of the real-time compressed air is synchronously displayed for a compressed air oil content detection display device (14)2In units of mg/m3。
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113720620A (en) * | 2021-09-26 | 2021-11-30 | 东风商用车有限公司 | Commercial vehicle dryer durability test device and detection method |
| CN113720620B (en) * | 2021-09-26 | 2024-05-03 | 东风商用车有限公司 | Commercial vehicle dryer durability test device and detection method |
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