CN112943829A - Middle cover structure for oil-gas separation of hydrodynamic retarder - Google Patents

Abstract

The invention belongs to automobile parts, and particularly relates to a middle cover structure for oil-gas separation of a hydraulic retarder. The front side of the middle cover is a side connected with the front cover, the rear side of the middle cover is a side connected with the rear cover, a working cavity is arranged in the middle of the side connected with the front cover, an exhaust hole is formed in the step surface of the working cavity, the lower end of the working cavity is a working cavity oil-gas separation chamber, the working cavity oil-gas separation chamber is communicated with the working cavity through the exhaust hole, a silencer mounting hole in the back of the exhaust cavity, which is connected with the front cover, is communicated with a first pressure stabilization chamber and a second pressure stabilization chamber respectively, an oil tank oil-gas separation area is arranged on the side, connected with the rear cover, on the left side of the exhaust cavity, an oil tank is arranged on the inner side of the middle cover, which is connected with the rear cover. Simple structure, the integrated level is high, can realize the oil-gas separation in hydraulic retarber working chamber and the oil tank, has reduced the loss of working fluid.

Description

Middle cover structure for oil-gas separation of hydrodynamic retarder

Technical Field

The invention belongs to automobile parts, and particularly relates to a middle cover structure for oil-gas separation of a hydraulic retarder.

Background

The hydrodynamic retarder is an auxiliary braking device, and converts the kinetic energy of a vehicle into heat energy completely through a working cavity formed by a stator and a rotor, and dissipates the heat energy through a whole vehicle heat dissipation system. When the hydrodynamic retarder works, the temperature of oil in the working cavity is high, atomized oil can be generated, and the oil can be easily lost through air intake and exhaust. When the hydrodynamic retarder is closed, oil in the working cavity can be rapidly returned to the oil tank, air in the oil tank can be rapidly discharged, and the oil can be mixed into the air and discharged along with the air due to collision between the oil and the air. The long-term use can cause the interior working fluid of retarber to lack, leads to hydraulic retarber braking performance to reduce or malfunctioning, still can produce the noise when exhausting when polluting the environment. When the hydraulic retarder works at a constant speed, the stability of the control air pressure is very important, the phenomenon of overshoot can occur only by adjusting the control air pressure through the electromagnetic valve, and the shaking of a vehicle and the poor speed control precision of the constant-speed kinetic energy are easily caused.

Disclosure of Invention

The invention aims to overcome the technical defects and provides the middle cover structure for the oil-gas separation of the hydraulic retarder, which has a simple structure, can realize the oil-gas separation of the exhaust gas in the working cavity and the oil tank and improve the speed control precision of the hydraulic retarder during constant-speed operation.

The technical scheme adopted by the invention for solving the technical problem is as follows: the middle cover structure for oil-gas separation of the hydraulic retarder comprises a middle cover, and is characterized in that the front side surface of the middle cover is a side surface connected with the front cover, the rear side surface of the middle cover is a side surface connected with the rear cover, a working cavity is arranged in the middle of the side surface connected with the front cover, the working cavity consists of a circular step hole and a large arc surface, the step surface of the working cavity is provided with an exhaust hole, the upper end of the working cavity is an oil-gas separation cavity, the upper end of the oil-gas separation cavity is an oil-gas separator mounting hole, the lower end of the oil-gas separation cavity is a working cavity oil-gas separation chamber, the working cavity oil-gas separation chamber is communicated with the working cavity through the exhaust hole, the left side outside the oil-gas separation cavity is provided with two muffler mounting holes, the periphery of a shell of the working cavity is provided with a plurality of reinforcing ribs I, the right side surface connected with the rear cover is provided with an exhaust cavity, the exhaust cavity, the left side of the exhaust cavity is connected with the rear cover and is provided with an oil tank oil-gas separation area, the oil tank oil-gas separation area is composed of a first separation chamber, a second separation chamber and a third separation chamber, the part, which is removed from the oil tank oil-gas separation area and the exhaust cavity, of the inner side of the joint of the middle cover and the rear cover is an oil tank, the first separation chamber and the second separation chamber are communicated with the oil tank, the second separation chamber is communicated with the third separation chamber, the third separation chamber is communicated with a rubber ball valve mounting hole, the first separation chamber and the second separation chamber are communicated with each other through oil grooves, the rubber ball valve mounting hole is communicated with the exhaust cavity, an oil inlet pipeline and an oil outlet pipeline are arranged in the oil tank, the oil inlet pipeline and the oil outlet pipeline are respectively communicated with the working cavity, and a plurality of criss-cross reinforcing.

The invention has the beneficial effects that: the well lid simple structure of hydrodynamic retarder oil-gas separation's well lid structure, the integrated level is high, and the processing of being convenient for easily assembles, can realize the oil-gas separation in hydrodynamic retarder working chamber and the oil tank, greatly reduced the loss of working fluid, guarantee the long-term normal operating fluid quantity of hydrodynamic retarder, noise when reducing the exhaust of hydrodynamic retarder simultaneously has improved the speed control precision of the permanent fast kinetic energy of hydrodynamic retarder.

Drawings

The following description is made in detail by way of example with reference to the accompanying drawings.

FIG. 1 is a front view of a structure of a middle cover structure for oil-gas separation of a hydrodynamic retarder.

Fig. 2 is a rear view of fig. 1.

Fig. 3 is a sectional view a-a in fig. 1.

Fig. 4 is a sectional view B-B in fig. 2.

In the figure, 1-middle cover; 1-1-a working chamber; 1-2-vent hole; 1-3-muffler mounting holes; 1-4-connecting the side face with the front cover; 1-5-oil-gas separation chamber; 1-6-oil-gas separator mounting holes; 1-7-working chamber oil-gas separation chamber; 1-8-oil tank oil gas separation zone; 1-9-a first separation chamber; 1-10-a second separation chamber; 1-11-a third separation chamber; 1-12-a first plenum; 1-13-exhaust chamber; 1-14-a second plenum; 1-15-oil inlet pipeline; 1-16-reinforcing rib I; 1-17-oil outlet pipeline; 1-18-reinforcing rib II; 1-19-oil tank; 1-20-connecting the side surface with the rear cover; 1-21-rubber ball valve mounting hole.

Detailed Description

In the embodiment, referring to fig. 1-4, a front side surface of a middle cover 1 in a middle cover structure for oil-gas separation of a hydrodynamic retarder is a side surface 1-4 connected with the front cover, and a rear side surface of the middle cover 1 is a side surface 1-20 connected with a rear cover. The middle of the side surface 1-4 connected with the front cover is a working cavity 1-1, the working cavity 1-1 consists of a circular step hole and a large circular arc surface, and the step surface in the working cavity is provided with an exhaust hole 1-2. The upper end of the working cavity 1-1 is provided with an oil-gas separation cavity 1-5, the upper end of the oil-gas separation cavity 1-5 is provided with an oil-gas separator mounting hole 1-6, the lower end of the oil-gas separation cavity is provided with a working cavity oil-gas separation chamber 1-7, the working cavity oil-gas separation chamber 1-7 is communicated with the working cavity 1-1 through an exhaust hole 1-2, the left side outside the oil-gas separation cavity 1-5 is provided with two muffler mounting holes 1-3, and the periphery of a shell of the working cavity 1-2 is provided with a plurality of reinforcing ribs 1-16. And the right side of the upper end of the side surface 1-20 connected with the rear cover is provided with an exhaust cavity 1-13, and the exhaust cavity 1-13 consists of a first pressure stabilizing chamber 1-12 and a second pressure stabilizing chamber 1-14. Muffler mounting holes 1-3 on the back of the exhaust cavities 1-13 and the side face 1-4 connected with the front cover are respectively communicated with a first pressure stabilizing chamber 1-12 and a second pressure stabilizing chamber 1-14. An oil tank oil gas separation area 1-8 is arranged on the left side of the exhaust cavity 1-13 and the connecting side surface 1-20 of the rear cover, and the oil tank oil gas separation area 1-8 is composed of a first separation chamber 1-9, a second separation chamber 1-10 and a third separation chamber 1-11. The part of the middle cover 1, which is connected with the rear cover at the inner side of the joint of the side face 1-20 and the rear cover and is used for removing the oil-gas separation area 1-8 of the oil tank and the exhaust cavity 1-13, is the oil tank 1-19, the first separation chamber 1-9 and the second separation chamber 1-10 are communicated with the oil tank 1-19, the second separation chamber 1-10 is communicated with the third separation chamber 1-11, the third separation chamber 1-11 is communicated with the rubber ball valve mounting hole 1-21, the first separation chamber 1-9 is communicated with the second separation chamber 1-10, the second separation chamber 1-10 is communicated with the third separation chamber 1-11 through oil grooves, and the rubber ball valve mounting hole 1-21 is communicated with the exhaust cavity 1-13. An oil inlet pipeline 1-15 and an oil outlet pipeline 1-17 are arranged in the oil tank 1-19, the oil inlet pipeline 1-15 and the oil outlet pipeline 1-17 are respectively communicated with the working cavity 1-2, and a plurality of criss-cross reinforcing ribs II 1-18 are arranged in the oil tank 1-19. An oil-gas separator is arranged in the oil-gas separator mounting hole 1-6, oil filter cotton is arranged on the oil-gas separator, a rubber ball valve is arranged in the rubber ball valve mounting hole 1-21, and a silencer is arranged in the silencer mounting hole 1-3.

The working principle of the middle cover structure for oil-gas separation of the hydrodynamic retarder is as follows: the middle cover 1 of the hydraulic retarder is connected with the front cover through the connecting side face 1-4, the rear cover is connected with the connecting side face 1-20 of the rear cover to form a shell of the hydraulic retarder, when the hydraulic retarder works, control gas enters an oil tank 1-19 of the middle cover 1 through the rear cover, oil in the oil tank 1-19 can be compressed to be empty and is pressed into a working cavity 1-1 through an oil inlet pipeline 1-15 to participate in the work, the temperature of the oil participating in the work is high to generate atomization, the working cavity 1-1 is not communicated with the atmosphere when the hydraulic retarder works, when the hydraulic retarder is closed, in order to improve the response time of closing, at the moment, the working cavity 1-1 is communicated with the atmosphere, and because a certain pressure exists in the working cavity 1-1, the atomized oil can enter an oil-gas separation chamber 1-7 of the working cavity through an exhaust hole 1, after the atomized oil is cooled, the oil can be automatically condensed into oil drops, large oil drops can be gathered in the oil-gas separation chamber 1-7 of the working cavity, small oil drops are still discharged to the atmosphere along with the pressure in the working cavity 1-1 to the oil-gas separator in the mounting hole 1-6 of the oil-gas separator, the small oil drops are blocked by filter cotton on the oil-gas separator and finally return to the oil-gas separation chamber 1-7 of the working cavity, and when the pressure of the working cavity 1-1 is the same as the atmospheric pressure, the oil collected in the oil-gas separation chamber 1-7 of the working cavity returns to the working cavity 1-1 through the exhaust hole 1-2 and returns to the oil tank 1-19 through the oil outlet pipeline 1-17; the oil liquid returning to the oil tanks 1-19 is cooled by a heat exchanger, the oil liquid in the cooled oil liquid temperature wall working cavity 1-1 is much lower, the atomized oil liquid is relatively less, the working oil liquid quickly returns to the oil tanks 1-19 to be exhausted, most of the oil liquid caused by the impact of the oil liquid and the gas is mixed with the exhaust gas at the moment, the exhaust gas can pass through the oil-gas separation area 1-8 of the oil tank and sequentially passes through the first separation chamber 1-9, the second separation chamber 1-10 and the third separation chamber 1-11, the atomized oil liquid is basically cooled and condensed into oil drops after passing through, the oil liquid mixed with the gas is greatly reduced by the damping action of the separation chambers, the oil liquid is condensed into the oil liquid and returns to the oil tanks 1-19 at the moment, and the exhaust gas passes through the rubber ball valves in the rubber ball valve mounting holes 1-21, the oil and the liquid are completely separated through the vibration of the rubber balls and the damping of the gas, the impact force of the discharged gas is reduced again, the discharged gas enters the first pressure stabilizing chamber 1-12 and the second pressure stabilizing chamber 1-14 of the exhaust cavity 1-13 in sequence, and finally the discharged gas is diffused and discharged to the atmosphere through the silencer, so that the exhaust noise is greatly reduced; when the hydraulic retarder works, compressed air in the oil tank 1-19 also passes through the first separation chamber 1-9, the second separation chamber 1-10 and the third separation chamber 1-11 of the oil-gas separation area 1-8 of the oil tank, then enters the first pressure maintaining chamber 1-12 and the second pressure maintaining chamber 1-14 of the exhaust cavity 1-13 through the rubber ball valve, and finally enters the muffler and is exhausted to the atmosphere; by means of the damping effect of the first separating chamber 1-9, the second separating chamber 1-10, the third separating chamber 1-11 and the rubber ball valve of the oil tank oil-gas separating area 1-8 on gas, the gas with reduced impact force enters the first pressure stabilizing chamber 1-12 and the second pressure stabilizing chamber 1-14 of the exhaust cavity 1-13, so that the stability of the required working pressure in the oil tank 1-19 can be ensured, the dynamic balance of the control air pressure can be realized, particularly, when the hydraulic retarder works at constant speed, the control air pressure is increased or reduced in real time according to the change of the road gradient, the overshoot phenomenon caused when the control air pressure is adjusted by only depending on an electromagnetic proportional valve is avoided, and the accuracy and the smoothness of the adjustment control air pressure are ensured. By realizing the oil-gas separation in the working cavity 1-1 and the oil tank 1-19 of the hydrodynamic retarder, the loss of working oil is greatly reduced, and the oil consumption of the hydrodynamic retarder in long-term normal operation is ensured; meanwhile, the noise of the hydraulic retarder during exhausting is reduced, and the speed control precision of the constant speed function of the hydraulic retarder is improved.

Claims (1)

1. A middle cover structure for oil-gas separation of a hydrodynamic retarder comprises a middle cover (1) and is characterized in that the front side surface of the middle cover (1) is a side surface connected with a front cover, the rear side surface of the middle cover (1) is a side surface connected with a rear cover, a working cavity (1-1) is arranged in the middle of the side surface connected with the front cover, the working cavity (1-1) is composed of a circular step hole and a large arc surface, an exhaust hole (1-2) is arranged on the step surface of the working cavity (1-1), the upper end of the working cavity (1-1) is an oil-gas separation cavity (1-5), the upper end of the oil-gas separation cavity (1-5) is an oil installation hole (1-6), the lower end of a gas separator is a working cavity oil-gas separation chamber (1-7), the working cavity oil-gas separation chamber (1-7) is communicated with the working cavity (1-1) through, two muffler mounting holes (1-3) are arranged on the left side outside the oil-gas separation cavity (1-5), a plurality of first reinforcing ribs (1-16) are arranged on the periphery of a shell of the working cavity (1-1), an exhaust cavity (1-13) is arranged on the right side of the upper end of the side surface connected with the rear cover, the exhaust cavity (1-13) is composed of a first pressure stabilizing chamber (1-12) and a second pressure stabilizing chamber (1-14), the muffler mounting holes (1-3) on the side surface connected with the front cover on the back surface of the exhaust cavity (1-13) are respectively communicated with the first pressure stabilizing chamber (1-12) and the second pressure stabilizing chamber (1-14), an oil tank oil-gas separation area (1-8) is arranged on the side surface connected with the rear cover on the left side of the exhaust cavity (1-13), and the oil-gas separation area (1-8) is composed of a, The oil-gas separation area (1-8) and the exhaust cavity (1-13) on the inner side of the joint of the middle cover (1) and the rear cover are removed from the oil-gas separation area (1-8) and the exhaust cavity (1-13) of the oil tank, the oil tank (1-19) is arranged in the middle cover (1), the first separation chamber (1-9) and the second separation chamber (1-10) are communicated with the oil tank (1-19), the second separation chamber (1-10) is communicated with the third separation chamber (1-11), the third separation chamber (1-11) is communicated with a rubber ball valve mounting hole (1-21), the first separation chamber (1-9) is communicated with the second separation chamber (1-10), the second separation chamber (1-10) is communicated with the third separation chamber (1-11) through oil grooves, the rubber ball valve mounting hole (1-21) is communicated with the exhaust cavity (1-13), an oil inlet pipeline (1-15) and an oil outlet pipeline (1-17) are arranged in the oil tank (1-19), the oil inlet pipeline (1-15) and the oil outlet pipeline (1-17) are respectively communicated with the working cavity (1-1), and a plurality of criss-cross reinforcing ribs II (1-18) are arranged in the oil tank (1-19).

Images