CN213902483U

CN213902483U - Vortex street type air leakage measuring instrument for engine

Info

Publication number: CN213902483U
Application number: CN202022062746.9U
Authority: CN
Inventors: 梁桂森
Original assignee: Shanghai Tocell Engine Testing Equipment Co ltd
Current assignee: Shanghai Tocell Engine Testing Equipment Co ltd
Priority date: 2020-09-20
Filing date: 2020-09-20
Publication date: 2021-08-06
Anticipated expiration: 2030-09-20

Abstract

The utility model discloses a belongs to the technical field of measuring apparatu, specifically is engine vortex street formula gas leakage measuring apparatu, including gas flowmeter, inlet connection pipe, engine gas leakage intake pipe, removal support, surge tank, steady voltage filter vat, outlet connection pipe and gas leakage discharge pipe, the left and right sides of gas flowmeter is connected with outlet connection pipe and inlet connection pipe respectively, engine gas leakage intake pipe is installed on the right side the outer wall bottom of surge tank, the gas leakage discharge pipe is installed on the left side the outer wall bottom of surge tank, the top of support is connected with surge tank fixed connection, in this application document, through adopting vortex street formula flowmeter to cooperate surge tank and steady voltage filter vat, realize the filtration to gas, simultaneously through the rectification structure of installation, reduced the instantaneous air current that gas produced after entering gas flowmeter's measuring range and caused the problem that the authenticity of measuring data becomes poor, is convenient to use.

Description

Vortex street type air leakage measuring instrument for engine

Technical Field

The utility model relates to a measuring apparatu technical field specifically is engine vortex street formula gas leakage measuring apparatu.

Background

At present, the air intake characteristic of a four-stroke engine depends on the volume expansion work of air and fuel after combustion in a cylinder, a piston and a cylinder sleeve are sealed by a piston ring, but air leakage inevitably occurs due to the sealing characteristic of the piston ring, so the air leakage of the engine is the most main technical index in the design and development process of the engine.

Engine blow-by gauges are primarily used to measure the continuous flow of gas leaking from the gaps in pistons, piston rings, booster bearing gaps, and other passages. This gas enters the crankcase and flows out through the blow-by of the crankcase.

Experiments show that the air leakage of the engine can be checked to judge the processing quality condition of the surface of the cylinder, the quality condition of a piston, a piston ring and a piston ring groove, the deformation of the cylinder and the assembly condition of a gasket, in the engine experiments, the air leakage change can provide information of the running condition of the engine, in the process of developing the engine, when the engine durability experiment is carried out, the air leakage measurement experiment can shorten the whole test time, and can prevent serious problems by finding the change of the engine in the early stage, and the air leakage of the engine is characterized in that: the air leakage is small; the values of different engine blow-by quantities vary widely, possibly from a few litres per minute to hundreds of litres per minute; the blow-by is related to the in-cylinder pressure, and is a discontinuous flow; the pollution is serious in air leakage. The engine leakage is discontinuous leakage, no proper flowmeter is used for measuring the leakage flow of the engine, and the commonly adopted common gas flowmeters such as a float flowmeter, a vortex flowmeter and the like can not completely meet the requirement.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above and/or other problems that exist in the existing engine leakage measuring instruments.

Therefore, the utility model aims at providing an engine vortex street formula gas leakage measuring apparatu can solve the gas leakage measuring apparatu range among the prior art narrower and to the unable measuring of dirty gas and the relatively poor problem of precision.

For solving the technical problem, according to the utility model discloses an aspect, the utility model provides a following technical scheme:

engine vortex street formula gas leakage measuring apparatu, including gas flowmeter, the connecting pipe that admits air, engine gas leakage intake pipe, removal support, surge tank, steady voltage filter vat, the connecting pipe and the gas leakage discharge pipe of giving vent to anger, gas flowmeter's the left and right sides respectively with give vent to anger the connecting pipe and admit air the connecting pipe and be connected, the other end and the surge tank of the connecting pipe of giving vent to anger of admitting air and giving vent to anger are connected, the steady voltage filter vat is installed on the right side in the surge tank, engine gas leakage intake pipe is installed on the right side the outer wall bottom of surge tank, the gas leakage discharge pipe is installed in the left side the outer wall bottom of surge tank, the top and the surge tank fixed connection of support.

As an engine vortex street formula gas leakage measuring apparatu an preferred scheme, wherein: the clamp is all installed with the junction of the connecting pipe of giving vent to anger and the connecting pipe that admits air respectively to gas flowmeter's the left and right sides, the clamp comprises a plurality of fixture blocks and connecting rod, the fixture block rotates between with being connected to be connected and is connected, the dismantlement department of clamp comprises two fixture blocks and threaded rod fixed connection.

As an engine vortex street formula gas leakage measuring apparatu an preferred scheme, wherein: the gas flowmeter is a vortex street type gas flow sensor.

As an engine vortex street formula gas leakage measuring apparatu an preferred scheme, wherein: the pressure stabilizing filter barrel is connected with the pressure stabilizing tank in an embedded mode, a sealing ring is installed between the pressure stabilizing filter barrel and the pressure stabilizing tank, the sealing ring is composed of a concave steel ring and a rubber ring embedded in the steel ring, an iron wire net layer is filled in the rubber ring, and the bottom of the outer wall of the steel ring is in threaded connection with the pressure stabilizing tank.

As an engine vortex street formula gas leakage measuring apparatu an preferred scheme, wherein: install fairing between gas flowmeter and the connecting pipe that admits air, fairing comprises a plurality of sector plates and the fender of installing on the sector plate, fairing installs the mouth of pipe junction at connecting pipe and gas flowmeter of admitting air.

Compared with the prior art: gas leakage measuring apparatu among the prior art can not carry out flow monitoring to the gas leakage under the discontinuous condition of engine, can not satisfy needs, in this application file, through adopting vortex street formula flowmeter cooperation surge tank and steady voltage filter vat, realize the filtration to gas, simultaneously through the rectification structure of installation, reduced the gas and caused the problem emergence that measured data's authenticity becomes poor at the instantaneous air current that produces after the measuring range that enters into gas flowmeter, facilitate the use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail with reference to the accompanying drawings and detailed embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor. Wherein:

FIG. 1 is a schematic structural view of an engine vortex street type air leakage measuring instrument of the present invention;

fig. 2 is a schematic structural view of a rectifying device of the engine vortex street type air leakage measuring instrument of the present invention.

In the figure: 100 gas flow meter, 200 air inlet connecting pipe, 300 engine air leakage inlet pipe, 400 mobile bracket, 500 pressure stabilizing tank, 600 pressure stabilizing filter barrel, 700 air outlet connecting pipe, 800 air leakage outlet pipe, 900 fairing, 910 sector plate and 920 fender.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways than those specifically described herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Next, the present invention will be described in detail with reference to the schematic drawings, and in the detailed description of the embodiments of the present invention, for convenience of explanation, the sectional view showing the device structure will not be enlarged partially according to the general scale, and the schematic drawings are only examples, and should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

The utility model provides an engine vortex street formula gas leakage measuring apparatu, please refer to fig. 1-2, including gas flowmeter 100, inlet connection pipe 200, engine gas leakage intake pipe 300, removal support 400, surge tank 500, steady voltage filter vat 600, the connecting pipe 700 and the gas leakage discharge pipe 800 of giving vent to anger, the left and right sides of gas flowmeter 100 is connected with the connecting pipe 700 of giving vent to anger and inlet connection pipe 200 respectively, the other end and the surge tank 500 of connecting pipe 200 and the connecting pipe 700 of giving vent to anger are connected, the steady voltage filter vat 600 is installed on the right side in surge tank 500, engine gas leakage intake pipe 300 is installed on the right side the outer wall bottom of surge tank 500, gas leakage discharge pipe 800 is installed in the left side the outer wall bottom of surge tank 500, the top and the surge tank 500 fixed connection of support.

Referring to fig. 1 again, the left and right sides of the gas flowmeter 100 are respectively provided with a hoop at the connection point with the gas outlet connection pipe 700 and the gas inlet connection pipe 200, the hoop is composed of a plurality of clamping blocks and a connection rod, the clamping blocks are rotatably connected with the connection point, and the disassembly point of the hoop is composed of two clamping blocks and a threaded rod which are fixedly connected.

Referring again to fig. 1, the gas flowmeter 100 is a vortex shedding gas flow sensor.

Referring to fig. 1 again, the pressure stabilizing filter barrel 600 is connected with the pressure stabilizing tank 500 in a nested manner, a sealing ring is installed between the pressure stabilizing filter barrel 600 and the pressure stabilizing tank 500, the sealing ring is composed of a concave steel ring and a rubber ring embedded in the steel ring, an iron wire mesh layer is filled in the rubber ring, and the bottom of the outer wall of the steel ring is in threaded connection with the pressure stabilizing tank 500.

Referring to fig. 2 again, a rectifying device 900 is installed between the gas flowmeter 100 and the intake connecting pipe 200, the rectifying device 900 is composed of a plurality of sector plates 910 and a fender 920 installed on the sector plates 910, and the rectifying device 900 is installed at a connection position of the intake connecting pipe 200 and the nozzle of the gas flowmeter 100.

In the specific use process, the movable support 400 is used for fixedly connecting the two surge tanks 500, gas enters from the gas leakage inlet pipe 300 of the engine, the gas is filtered through the surge tank 600 in the surge tank 500, the filtering structure in the surge tank 600 is a commonly-used automobile exhaust emission filtering structure, when the filtered gas is output to the gas flowmeter 100 through the gas inlet connecting pipe 200, the rectifying device 900 installed in the gas inlet connecting pipe 200 rectifies the gas, the gas increases the flow area of the gas through the fan-shaped plate 910, the wing plate 920 disperses the flowing gas, the rectified gas flow is detected through the gas flowmeter 100, and the detected gas is discharged from the gas leakage discharge pipe 800 after passing through the surge tank 500.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the non-exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. Engine vortex street formula gas leakage measuring apparatu, its characterized in that: including gas flowmeter (100), connecting pipe (200), engine gas leakage intake pipe (300), movable support (400), surge tank (500), steady voltage filter vat (600), the connecting pipe (700) and the gas leakage discharge pipe (800) of giving vent to anger, the left and right sides of gas flowmeter (100) is connected with connecting pipe (700) and the connecting pipe (200) of admitting air respectively of giving vent to anger, the other end and the surge tank (500) of connecting pipe (200) and the connecting pipe (700) of giving vent to anger of admitting air are connected, install on the right side steady voltage filter vat (600) in surge tank (500), engine gas leakage intake pipe (300) are installed on the right side the outer wall bottom of surge tank (500), gas leakage discharge pipe (800) are installed on the left side the outer wall bottom of surge tank (500), the top and surge tank (500) fixed connection of support.

2. The engine vortex street type air leakage measuring instrument according to claim 1, characterized in that: the left and right sides of gas flowmeter (100) all installs the clamp with the junction of connecting pipe (700) and the connecting pipe (200) of admitting air of giving vent to anger respectively, the clamp comprises a plurality of fixture blocks and connecting rod, the fixture block rotates between being connected with and is connected to be connected, the dismantlement department of clamp comprises two fixture blocks and threaded rod fixed connection.

3. The engine vortex street type air leakage measuring instrument according to claim 1, characterized in that: the gas flowmeter (100) is a vortex street type gas flow sensor.

4. The engine vortex street type air leakage measuring instrument according to claim 1, characterized in that: the utility model discloses a pressure stabilizing filter, including steady voltage filter vat (600), sealing washer is installed to steady voltage filter vat (600) and surge tank (500), nested connection between steady voltage filter vat (600) and surge tank (500), the sealing washer comprises concave steel ring and the rubber circle of embedding installation in the steel ring, the rubber circle intussuseption is filled with the iron wire stratum reticulare, threaded connection between the outer wall bottom of steel ring and surge tank (500).

5. The engine vortex street type air leakage measuring instrument according to claim 1, characterized in that: install fairing (900) between gas flowmeter (100) and air inlet connection pipe (200), fairing (900) comprises a plurality of sector plates (910) and fender (920) of installing on sector plate (910), fairing (900) is installed in the mouth of pipe junction of air inlet connection pipe (200) and gas flowmeter (100).