CN206656859U - A kind of gas and oil separating plant for engine piston air loss experiment - Google Patents

Abstract

The utility model discloses an oil-gas separation device used for an engine piston air leakage test, aiming at overcoming the current problems of low oil-gas separation efficiency, complex structure, and poor versatility. The oil-gas separation device includes an oil-gas separator body and a radiator and cooling water control system; the radiator is obliquely placed in the body of the oil-air separator, the lower water chamber of the radiator protrudes from the arc-shaped through hole on the right side of the cylinder wall of the oil-gas separator body, and the upper end of the flow cavity of the radiator extends from the The left side of the top cover of the oil-gas separator body protrudes, the lower water chamber is welded to the right cylinder wall of the oil-gas separator body, the upper end of the flow chamber is welded to the left side of the top cover of the oil-gas separator body, and the flow chamber The contact part between the body and the inner surface of the oil-gas separator body is welded and connected. The electric two-way valve in the cooling water control system is installed on the pipe connecting the cooling water tower and the cooling water supply pipe. The temperature sensor in the cooling water control system is installed on the connection with the oil-gas separator On the pipeline connected to the oil and gas outlet of the body.

Description

A kind of oil and gas separation device used for engine piston leakage test

technical field

The utility model relates to a test device in the field of engine development, more precisely, the utility model relates to an oil-gas separation device for the test of engine piston air leakage

Background technique

1. When the engine is working, due to the gap between the cylinder liner and the piston and piston ring, a part of the mixed gas containing fuel, oil, water vapor and other vapors will enter the crankcase. If there are defects in the design or processing of pistons, piston rings and cylinder liners, the mixture gas leaking into the crankcase will greatly increase, resulting in reduced engine power, increased fuel consumption, and increased oil consumption. In order to avoid design defects in pistons, piston rings and cylinder liners, and to control the mixture gas entering the crankcase, during the development process of the engine, the piston leakage test must be carried out to establish a test database for evaluating pistons, pistons, etc. The design quality of the ring and the cylinder liner can achieve the purpose of controlling the leakage of the piston.

2. Large-displacement engines have a large amount of air leakage under high-speed and high-load conditions, especially when there are defects in the design of pistons, piston rings and cylinder liners, the amount of air leakage is even greater.

3. At present, there are several traditional oil and gas separation device methods:

1) The built-in partition forms a labyrinth, and the larger oil droplets are separated by the airflow hitting the partition;

2) A centrifugal separation device in which the rotor is forcibly driven by an external force;

3) The oil and gas are accelerated to separate through the spiral side wall. Some of these devices have low separation efficiency, some are complex in structure, and have poor versatility, so they are not suitable for the developed engine. This leads to oil condensation blocking the test pipeline and even polluting the test sensor in the pipeline of the test instrument during the piston air leakage test, thereby affecting the test efficiency and test accuracy.

Contents of the invention

The technical problem to be solved by the utility model is to overcome the problems of low oil-gas separation efficiency, complex structure and poor versatility in the prior art, and provide a universal and high separation efficiency for the engine piston leakage test oil-gas separation device.

In order to solve the above-mentioned technical problems, the utility model is realized by adopting the following technical scheme: the oil-gas separation device for engine piston air leakage test includes an oil-gas separator body, a radiator and a cooling water control system.

The radiator is placed obliquely in the body of the oil-gas separator, the lower water chamber of the radiator protrudes from the arc-shaped through hole on the right cylinder wall of the body of the oil-gas separator, and the upper end of the flow cavity of the radiator is separated from the oil-gas The through hole on the left side of the top cover of the radiator body protrudes, and the lower water chamber of the radiator is connected to the arc-shaped through hole on the right side of the oil-gas separator body by welding, and the upper end of the flow chamber is separated from the oil and gas. The through holes on the left side of the top cover of the device body are connected by welding, the front and rear end faces of the flow cavity are connected by welding, and the part in contact with the inner surface of the oil-gas separator body wall is connected by welding. The temperature sensor in the cooling water control system is installed on the On the oil and gas test pipeline connected to the oil and gas outlet of the oil and gas separator body, the electric two-way valve is installed on the cooling water supply pipe connected to the cooling water inlet.

The body of the oil-gas separator described in the technical proposal is a cylindrical shell-like structural member. On the left side wall of the upper end of the oil-gas separator body, there is a cylindrical oil-gas inlet connected to the inside of the barrel. On the opposite side of the oil-gas inlet An L-shaped mounting plate is installed on the outside of the right cylinder wall, and a cylindrical oil and gas outlet is provided on the right side of the top cover of the oil-gas separator body. The through hole of the flow cavity in the radiator installed on a flat surface, the geometric size of the through hole is equal to the external dimension of the flow cavity at this place, the bottom of the oil-gas separator body is set as a funnel-shaped bottom, and at the bottom of the tube A cylindrical oil outlet is set at the center of the oil-gas separator body, and an arc-shaped through hole for installing the lower water chamber is arranged on the right side wall of the lower end of the oil-gas separator body. The geometric dimensions of the arc-shaped through hole are equal to the outer dimensions of the lower water chamber.

The radiator described in the technical solution is a "Z"-shaped hollow plate structure, and the radiator is composed of an upper water chamber, a flow chamber with a cooling water flow chamber and a lower water chamber; the upper water chamber and the lower water chamber The cross-sections are all rectangular and circular hollow cross-sections with equal wall thickness. The front and rear sides of the flow chamber are symmetrical curved surfaces; Parallel, the connection between the flow cavity and the upper water chamber and the lower water chamber is oblique, the angle between the flow cavity and the upper water chamber and the lower water chamber is 95 degrees to 115 degrees, and the top of the upper water chamber is provided with cylindrical cooling water Inlet, the bottom surface of the right side of the lower water chamber is provided with a cylindrical cooling water outlet, and the front and rear center of the left end of the lower water chamber is provided with a cylindrical through hole, and the cylindrical through hole is not connected with the lower water chamber.

The left and right cavity walls of the flow cavity described in the technical solution are symmetrically provided with 10 to 15 rows and 5 to 10 columns of cylindrical bosses with cavities, and the outer diameter of the bosses is 5mm~ 10mm, the height of the boss is 5mm~10mm, the distance between two adjacent rows of bosses along the length direction of the flow cavity is 15mm~30mm, and the distance between two adjacent rows of bosses along the width direction of the flow cavity is 15mm ~25mm, the cavity of the boss communicates with the cooling water flow cavity of the radiator.

The coolant control system described in the technical solution also includes a proportional-integral temperature controller; the terminal box on the top of the temperature sensor leads two signal transmission lines to connect with the temperature signal transmission line interface on the proportional-integral temperature controller, and the proportional-integral temperature The control signal output line interface on the controller is connected with the signal transmission line on the valve top actuator of the electric two-way valve.

Compared with the prior art, the beneficial effects of the utility model are:

1. The radiator of the oil-gas separation device used for the engine piston air leakage test described in the utility model divides the oil-gas separation chamber into two cavities, which are communicated through the cylinder through hole passing through the radiator lower water chamber, The oil and gas entering the oil and gas separator have a longer moving track, and the oil and gas separation efficiency is improved from the structural arrangement.

2. The radiator of the oil-gas separation device used in the engine piston air leakage test described in the utility model forcibly cools the oil and gas, so that the oil in the oil and gas can be condensed and dripped quickly, and the oil-gas separation efficiency is improved.

3. The surface of the radiator flow chamber of the oil-gas separation device used for the engine piston air leakage test described in the utility model has a boss with an inner cavity, which can not only increase the surface area of oil-gas impact, but also increase the oil-gas and oil-gas interaction. The contact area on the surface of the flow cavity of the radiator improves the heat dissipation capacity of the radiator.

4. The cooling water control system of the oil-gas separation device used for the engine piston air leakage test described in the utility model can actively adjust the flow of cooling water according to the needs, thereby controlling the cooling capacity of the radiator to meet the different leakage requirements of different engines. Oil and gas separation requirements of gas volume.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is an axonometric projection view of the main structure of an oil-gas separation device for an engine piston air leakage test described in the present invention;

Fig. 2 is a full cross-sectional view of the main structure composition of an oil-gas separation device used for the engine piston air leakage test according to the utility model on the front view

Fig. 3 is an axonometric projection view of the structure of the radiator in the oil-gas separation device used for the air leakage test of the engine piston according to the utility model.

Fig. 4 is a schematic diagram of the structural composition of the cooling water control system in the oil-gas separation device used for the air leakage test of the engine piston according to the utility model.

In the figure: 1. Cooling water inlet, 2. Upper water chamber, 3. Flow cavity, 4. Top cover, 5. Oil and gas outlet, 6. L-shaped mounting plate, 7. Mounting hole, 8. Oil and gas separator body, 9. No. 1 separation chamber, 10, lower water chamber, 11. cooling water outlet, 12. through hole, 13. funnel-shaped bottom surface, 14, engine oil outlet, 15. cooling water flow chamber, 16. boss, 17. cavity, 18.2 No. separation chamber, 19. Oil and gas inlet, 20. Cooling water supply pipe, 21. Oil and gas test pipeline, 22. Temperature sensor, 23. Proportional integral temperature controller, 24. Electric two-way valve.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail:

Referring to Fig. 1 and Fig. 2, an oil-gas separation device for engine piston leakage test according to the utility model includes an oil-gas separator body 8, a radiator and a cooling water control system.

Referring to Fig. 2 and Fig. 2, the oil-gas separator body 8 is a cylindrical shell structure, the top cover 4 of the oil-gas separator body 8 is a circular flat plate, and the right side of the top cover 4 is provided with a 4. Through the connected cylindrical oil and gas outlet 5, the left side of the top cover 4 is provided with a through hole for installing the flow cavity 3 in the radiator. The front and back of the through hole are arc surfaces, and the left and right sides are planes. The size is equal to the external dimensions of the flow cavity 3 at this place. A cylindrical oil and gas inlet 19 connected to the cylinder wall is provided on the left cylinder wall at the upper end of the oil-gas separator body 8 . The outer side of the wall is welded with an L-shaped mounting plate 6, and the vertical wall of the L-shaped mounting plate 6 is provided with a mounting hole 7 for installing and fixing the oil-gas separator body 8, and a right cylinder wall at the lower end of the oil-gas separator body 8 is provided. The arc-shaped through hole of the lower water chamber 10 is installed, and the geometric size of the arc-shaped through hole is equal to the outer dimension of the lower water chamber 10 in the radiator. A cylindrical machine oil outlet 14 after oil and gas separation is arranged at the place.

Referring to Figure 2 and Figure 3, the radiator described is a "Z"-shaped hollow plate structure, and the radiator is composed of an upper water chamber 2, a flow chamber 3 provided with a cooling water flow chamber 15, and a lower water chamber 10 , the cross-sections of the upper water chamber 2 and the lower water chamber 10 are rectangular hollow cross-sections with equal wall thickness. 10 are sequentially connected into one body, the upper water chamber 2 and the lower water chamber 10 are parallel to each other, the flow cavity 3 and the upper water chamber 2 and the lower water chamber 10 are connected obliquely, and the connection between the flow cavity 3 and the upper water chamber 2 and the lower water chamber 10 The angle between them is 95° to 115°. A cylindrical cooling water inlet 1 is provided on the top of the upper water chamber 2 , and a cylindrical cooling water outlet 11 is provided on the right bottom surface of the lower water chamber 10 .

The left and right chamber walls of the flow cavity 3 are symmetrically provided with 10 to 15 rows and 5 to 10 columns of cylindrical bosses 16 with cavities 17, and the outer diameter of the bosses 16 is 5 to 10 mm. , the height of the bosses 16 is 5 to 10 mm, the distance between two adjacent rows of bosses 16 along the length direction of the flow chamber 3 is 15 to 30 mm, and the distance between two adjacent rows of bosses 16 along the width direction of the flow chamber 3 The distance is 15 to 25mm, the cavity 17 of the boss 16 communicates with the cooling water flow cavity 15 of the radiator; the front and rear center of the left end of the lower water chamber 10 of the radiator is provided with a cylindrical through hole 12, and the cylindrical through hole 12 The top end surface and the bottom end surface of the hole 12 orifice and the top end surface and the bottom end surface of the lower water chamber 10 are coplanar, and the cylindrical through hole 12 is not connected with the lower water chamber 10 .

The radiator is obliquely placed in the oil-gas separator body 8, the upper water chamber 2 of the radiator is located above the top cover 4 of the oil-gas separator body 8, and the lower water chamber 10 of the radiator is connected from the right cylinder wall of the oil-gas separator body 8 The upper end of the flow cavity 3 of the radiator protrudes from the through hole whose front and rear sides are circular arc surfaces on the left side of the top cover 4 of the oil-gas separator body 8, and the left and right sides are planes. The lower water chamber 10 is connected to the arc-shaped through hole on the right side of the oil-gas separator body 8 by welding, and the upper end of the flow chamber 3 is connected to the through hole on the left side of the top cover 4 of the oil-gas separator body 8 by welding. Connected by welding, the front and rear end surfaces of the flow chamber 3 are in tangential contact with the inner surface of the oil-gas separator body 8, and the part of the flow chamber 3 that is in contact with the inner surface of the oil-gas separator body 8 is connected by welding.

The oil-air separation device used for engine piston air leakage test divides the oil-air separation chamber of the oil-air separator body 8 into No. 1 separation chamber 9 and No. 2 separation chamber 18 by a radiator.

Referring to FIG. 4 , the coolant control system includes a temperature sensor 22 , a proportional-integral temperature controller 23 and an electric two-way valve 24 .

The temperature sensor 22 adopts the air duct type temperature sensor whose model is TSC-8212-103B34. The measuring part of the temperature sensor 22 is a cylindrical rod, and the head is equipped with a threaded joint for installation. The end of the temperature sensor 22 top is Two signal transmission lines are drawn from the box, and the temperature signal is transmitted to the proportional integral temperature controller 23;

The model of the proportional-integral temperature controller 23 is TC-8312-11K, and the proportional-integral temperature controller 23 is a square container box with a target temperature setting knob, a temperature signal transmission line interface and a control signal output line interface on the box;

The model of the electric two-way valve 24 is 24VA-7010-8503. The valve body structure of the electric two-way valve is a two-way valve. There are connecting threads at both ends of the valve body. Two signal transmission lines connected to the control interface of the proportional-integral temperature controller 23 are drawn from the actuator.

The temperature sensor 22 is installed on the oil-gas test pipeline 21 connected between the oil-gas outlet 5 and the piston air leakage test instrument, and the end box at the top of the temperature sensor 22 leads two signal transmission lines to connect to the proportional-integral temperature controller 23 The temperature signal transmission line interface on the proportional integral temperature controller 23 is connected to the signal transmission line on the valve top actuator of the electric two-way valve 24, and the electric two-way valve 24 is installed on the cooling water tower connected to the cooling water inlet. 1 between the cooling water supply pipes 20 .

The oil-gas separation device used for engine piston air leakage test divides the oil-gas separation chamber of the oil-gas separator body 3 into No. 1 separation chamber 5 and No. 2 separation chamber 10 by a radiator.

The working principle of an oil-gas separation device used for engine piston leakage test:

The radiator divides the oil-gas chamber of the oil-gas separator body 8 into No. 1 separation chamber 9 and No. 2 separation chamber 18, and the cylindrical through hole 12 communicates No. 1 separation chamber 5 and No. 2 separation chamber 10, so that oil and gas enter The oil and gas in the separation device have a longer moving track, which improves the oil and gas separation effect from the structural arrangement. The oil and gas entering from the oil and gas inlet 19 enters the No. 2 separation chamber 18, contacts with the flow cavity 3 surface of the radiator, and performs heat exchange, and the temperature of the oil and gas is reduced; The surfaces of the flow chambers 3 collide with each other, aggravating the condensation of the oil, causing the oil to condense and gather, dripping out from the oil outlet 14 at the bottom of the oil-gas separator body 8, and returning to the crankcase; the oil and gas separated by the No. The cylindrical through hole 12 on the lower water chamber 10 of the device enters the No. 1 separation chamber 9, further exchanges heat with the surface of the flow chamber 3 and collides with the surface of the flow chamber 3 and the surface of the No. 1 separation chamber 9. Oil-gas separation is further carried out in the No. 2 separation chamber 9. After the oil is condensed and gathered, it drips from the cylindrical through hole 12 on the lower water chamber 10 into the No. 2 separation chamber 18, and finally drips out from the oil outlet 14 at the bottom of the oil-gas separation device, and enters the The crankcase, and the separated oil and gas go out from the oil and gas outlet 5 and enter the test pipeline. The cooling water enters the upper water chamber 2 from the external cooling water inlet pipe through the cooling water inlet 1, flows into the cooling water flow chamber 15 from the upper water chamber 2, and reduces the temperature on the surface of the flow chamber 3, taking away the No. 2 separation chamber 18 and The heat of the oil and gas in No. 1 separation chamber 9 finally enters the lower water chamber 10 and flows from the cooling water outlet 11 to the external cooling water return pipe.

The boss 16 with a cavity 17 arranged on the surface of the flow chamber 3 increases the surface area of the flow chamber 3 in contact with the oil and gas, which is conducive to the heat exchange between the flow chamber 3 and the oil and gas. The cavity 17 of the boss 16 and the cooling water The flow cavity 15 is communicated so that cooling water can enter the cavity 17 of the boss 16, take away the heat on the surface of the boss 16, reduce the temperature of the oil and gas through forced heat dissipation, and improve the oil and gas separation effect.

The temperature sensor 22 in the cooling water control system transmits the oil-gas temperature signal measured from the oil-gas test pipeline 21 to the proportional-integral temperature controller 23 through the signal transmission line, and the proportional-integral temperature controller 23 transmits the temperature value measured by the temperature sensor 22 Constantly compare with the temperature value set in the proportional-integral temperature controller according to the needs, and according to the comparison result, continuously output control signals to the actuator from the control interface through the signal transmission line of the actuator on the electric two-way valve 24, and the electric two-way valve 24 According to the control signal, the actuator on the motor adjusts the opening of the valve in the electric two-way valve 24, thereby controlling the cooling water flow, realizing the adjustment of the cooling capacity of the radiator, meeting the requirements of the piston air leakage test under different working conditions of different engines, and transferring the oil and gas The temperature is controlled within the temperature range where the oil is completely condensed.

Claims (5)

1. a kind of oil-gas separation device for engine piston leakage test, it is characterized in that, described a kind of oil-gas separation device for engine piston leakage test comprises oil-gas separator body (8), radiator and Cooling water control system; The radiator is obliquely placed in the oil-gas separator body (8), and the lower water chamber (10) of the radiator protrudes from the arc-shaped through hole on the right cylinder wall of the oil-gas separator body (8), and the radiator The upper end of the flow cavity (3) protrudes from the through hole on the left side of the top cover (4) of the oil-gas separator body (8), and the lower water chamber (10) of the radiator and the right side of the oil-gas separator body (8) The arc-shaped through-holes on the side cylinder wall are connected by welding, and the upper end of the flow cavity (3) is connected by welding with the through-hole on the left side of the top cover (4) of the oil-gas separator body (8). The front and rear end surfaces of the cavity (3) are connected with the inner surface of the oil-gas separator body (8) by welding, and the temperature sensor (22) in the cooling water control system is installed on the wall of the oil-gas separator body (8). On the oil and gas test pipeline (21) connected to the oil and gas outlet (5) of the oil and gas, the electric two-way valve (24) is installed on the cooling water supply pipe (20) connected with the cooling water inlet (1). 2. according to claim 1, a kind of oil-gas separation device for engine piston air leakage test is characterized in that, described oil-gas separator body (8) is a cylindrical shell structure, and oil-gas separation A cylindrical oil and gas inlet (19) connected to the inside of the cylinder is provided on the left side wall of the upper end of the device body (8), and an L-shaped mounting plate ( 6), the right side of the top cover of the oil-gas separator body (8) is provided with a cylindrical oil-gas outlet (5), and the left side of the top cover of the oil-gas separator body (8) is provided with arc-shaped front and back surfaces, left and right sides It is the through hole of the flow cavity (3) in the plane installation radiator, the geometric size of the through hole is equal to the external dimension of the flow cavity (3) at this place, and the cylinder bottom of the oil-gas separator body (8) is set as a funnel shaped cylinder bottom, and a cylindrical machine oil outlet (14) is arranged at the center of the cylinder bottom, and an arc-shaped through hole for installing the lower water chamber (10) is arranged on the right cylinder wall at the lower end of the oil-gas separator body (8). The geometric dimension of the arc-shaped through hole is equal to the external dimension of the lower water chamber (10). 3. A kind of oil-gas separation device for engine piston air leakage test according to claim 1, characterized in that, the radiator is a "Z" shaped hollow plate structure, and the radiator is formed by the upper The water chamber (2), the flow chamber (3) provided with the cooling water flow chamber (15), and the lower water chamber (10) are composed; the cross sections of the upper water chamber (2) and the lower water chamber (10) are both rectangular equal walls Thick annular hollow cross-section, the front and rear end faces of the flow chamber (3) are symmetrical curved surfaces; the upper water chamber (2), the flow chamber (3) and the lower water chamber (10) are sequentially connected into one body, and the upper water The chamber (2) and the lower water chamber (10) are parallel to each other, the connection between the flow cavity (3) and the upper water chamber (2) and the lower water chamber (10) is inclined, and the flow cavity (3) and the upper water chamber (2 ) and the lower water chamber (10) are at an angle of 95° to 115°, a cylindrical cooling water inlet (1) is provided on the top of the upper water chamber (2), and a cylindrical cooling water inlet (1) is provided on the right bottom of the lower water chamber (10). The cooling water outlet (11), the front and back center of the lower water chamber (10) left end is provided with a cylindrical through hole (12), and the cylindrical through hole (12) is not communicated with the lower water chamber (10). 4. according to claim 1 or 3 described a kind of oil-gas separation device that is used for the air leakage test of engine piston, it is characterized in that, the left and right cavity wall of described flow cavity are symmetrically respectively provided with 10 15 rows and 5 to 10 columns and a cylindrical boss (16) with a cavity (17), the outer diameter of the boss (16) is 5 mm to 10 mm, and the height of the boss (16) is 5 mm to 10 mm, The distance between two adjacent rows of bosses (16) along the length direction of the flow chamber (3) is 15 mm to 30 mm, and the distance between two adjacent rows of bosses (16) along the width direction of the flow chamber (3) is 15mm-25mm, the cavity (17) of the boss (16) communicates with the cooling water flow chamber (15) of the radiator. 5. according to a kind of oil-gas separation device that is used for engine piston air leakage test according to claim 1, it is characterized in that, described coolant control system also comprises proportional-integral temperature controller (23); The terminal box at the top of the temperature sensor (22) draws two signal transmission lines to connect with the temperature signal transmission line interface on the proportional integral temperature controller (23), and the control signal output line interface on the proportional integral temperature controller (23) Connect with the signal transmission line on the valve top actuator of the electric two-way valve (24).