Lubricating oil circuit gas-liquid separation device

Abstract

The utility model discloses a lubricating oil circuit gas-liquid separation device which comprises a shell which is arranged in a lubricating oil circuit and provided with a gas-liquid separation cavity, and the shell is of a cylindrical structure and is provided with an oil inlet pipeline and an oil outlet pipeline which are communicated with an oil circuit in the lubricating oil circuit. An oil outlet of the oil inlet pipeline is arranged in the tangential direction of the edge of the shell so that oil flowing into the shell can form rotational flow in the gas-liquid separation cavity, and an adjusting mechanism used for increasing the gas-liquid rotational flow speed is further arranged on the shell. The centrifugal gas-liquid rotational flow structure is arranged in the gas-liquid separation device, so that oil entering the device forms rotational flow, bubbles in the oil are separated according to the centrifugal principle, and it is guaranteed that lubricating energy of a lubricating oil way is not affected by the bubbles; meanwhile, an adjusting mechanism used for increasing the rotational flow speed of the oil liquid is further arranged in the gas-liquid separation device, and the gas-liquid separation efficiency is improved by increasing the rotational flow speed of the oil liquid.

Description

Technical Field

[0001] The utility model relates to the technical field of lubricating oil circuits, in particular to a gas-liquid separation device for a lubricating oil circuit. Background Art

[0002] At present, oil-cooled motors are widely used in passenger car power systems. In traditional oil-cooled motor cooling systems, lubricating oil is usually sucked from the transmission side or the bottom of the motor by an oil pump and then cooled. However, this structure has the following defects: the traditional power system cooling and lubricating oil circuit is not equipped with a special lubricating oil degassing device. When the transmission system rotates, the gears or motor rotors rotate to stir the oil or the lubricating oil splashes during the lubrication and cooling process and comes into contact with the air, which easily brings air bubbles into the lubricating oil. The air in the cooling and lubrication system will affect the cooling and lubrication efficiency of the motor and transmission system and cause it to decline. Moreover, due to the presence of more air in the lubricating oil, the cooling system will become an uncontrollable system, and the air content in the lubricating oil cannot be controlled, resulting in a reduction in the life of the electric drive system or the performance of the motor. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a lubricating oil circuit gas-liquid separation device, which rotates lubricating oil with bubbles in the device by utilizing the principle of centrifugal force. Since the mass of the bubbles is smaller than the mass of the lubricating oil, the bubbles in the lubricating oil are subjected to a smaller centrifugal force during the rotation and will gather toward the center, while the lubricating oil is subjected to a larger centrifugal force and will gather on the outside, thereby achieving gas-liquid separation in the lubricating oil. At the same time, an adjusting device for increasing the oil swirl speed is also provided in the device, so that the higher the rotation speed of the oil, the better the bubble separation effect.

[0004] The utility model provides a lubricating oil circuit gas-liquid separation device, comprising a shell arranged in the lubricating oil circuit and having a gas-liquid separation chamber, the shell being in a cylindrical structure and respectively provided with an oil inlet pipe and an oil outlet pipe connected to an oil channel in the lubricating oil circuit, the oil outlet of the oil inlet pipe being arranged along a tangent direction of an edge of the shell so that the oil flowing into the shell forms a vortex in the gas-liquid separation chamber, and the shell is also provided with a regulating mechanism for increasing the gas-liquid vortex speed.

[0005] Furthermore, the adjusting mechanism includes a rotating blade assembly arranged on the top of the shell, and the rotating blade assembly includes a rotating shaft arranged on the top of the shell and can be driven to rotate along its own axis, a power source device arranged on the outside of the shell and used to drive the rotating shaft to rotate, and blades installed on the end of the rotating shaft, one end of the rotating shaft on which the blade is installed extends into the gas-liquid separation chamber, and the other end of the rotating shaft extends out of the shell and is connected to the power source device.

[0006] Furthermore, a mounting groove is provided on the top surface of the gas-liquid separation chamber at the top of the shell, a bearing shell coaxially arranged with the rotating shaft is provided in the mounting groove, a second clamping ring is provided at the opening of the mounting groove, and the bearing shell is axially limited by the second clamping ring and the bottom surface of the mounting groove.

[0007] Furthermore, a first clamping ring and a protrusion are respectively provided at both ends of the rotating shaft that cooperate with the bearing shell in the vertical direction. The first clamping ring and the protrusion are respectively in contact with the bottom surfaces of the two axial ends of the bearing shell and limit the axial position of the rotating shaft.

[0008] Furthermore, a through hole is provided on the top of the shell above the mounting groove, through which the rotating shaft can extend out of the shell, and an oil seal is provided in the through hole.

[0009] Furthermore, the shell includes an upper shell and a lower shell, the gas-liquid separation chamber is formed by connecting the upper shell and the lower shell, the oil inlet pipeline and the rotating blade assembly are arranged in the upper shell, and the oil outlet pipeline is arranged in the lower shell.

[0010] Furthermore, the regulating mechanism also includes a gas-liquid separation spacer arranged at the bottom of the lower shell body, the gas-liquid separation spacer is integrally formed with the lower shell body and has an inner curved surface and an outer curved surface in the radial direction of the lower shell body, the outer curved surface and the inner surface of the lower shell body are arranged concentrically in the vertical direction, and the inner curved surface is arranged to contract inwardly in the swirl direction of the oil.

[0011] Furthermore, it also includes an exhaust structure arranged at the central axis position of the bottom of the lower shell, the exhaust structure includes a first exhaust channel connected to the gas-liquid separation chamber, a third exhaust channel for discharging the separated gas out of the shell, and a second exhaust channel arranged between the first exhaust channel and the third exhaust channel, and a plug assembly is provided in the second exhaust channel for connecting or disconnecting the first exhaust channel and the third exhaust channel.

[0012] Furthermore, the plug assembly includes a fixed plug mounted on the lower shell, a movable plug slidably disposed in the second exhaust passage, and an elastic member disposed between the fixed plug and the movable plug.

[0013] Furthermore, the oil inlet pipeline and the oil outlet pipeline are provided with sealing rings at the connection ends with the oil passage in the lubricating oil circuit.

[0014] The beneficial effects of the utility model are as follows: the utility model arranges a centrifugal gas-liquid cyclone structure in the gas-liquid separation device so that the oil entering the device forms a cyclone, and uses the centrifugal principle to separate the bubbles in the oil to ensure that the lubricating energy of the lubricating oil circuit is not affected by the bubbles; at the same time, an adjusting mechanism for increasing the cyclone speed of the oil is also arranged in the gas-liquid separation device, and the gas-liquid separation efficiency is accelerated by increasing the cyclone speed of the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the structure of the gas-liquid separation device of the lubricating oil circuit in the utility model;

[0017] Figure 2 It is a top view of the upper shell of the utility model;

[0018] Figure 3 It is a top view of the lower shell of the utility model;

[0019] The figures are marked as follows: 1-upper shell; 2-lower shell; 3-oil inlet pipeline; 4-oil outlet pipeline; 5-rotating shaft; 6-blade; 7-power source device; 8-bearing; 9-protrusion; 10-first clamping ring; 11-second clamping ring; 12-oil seal; 13-gas-liquid separation spacer; 14-first exhaust channel; 15-second exhaust channel; 16-third exhaust channel; 17-movable plug; 18-fixed plug; 19-spring; 20-installation groove; 21-through hole; 22-sealing ring; 23-swirl direction. DETAILED DESCRIPTION

[0020] As shown in the figure, the utility model provides a lubricating oil circuit gas-liquid separation device, including a shell arranged in the lubricating oil circuit and having a gas-liquid separation chamber, the shell is a cylindrical structure and is respectively provided with an oil inlet pipe 3 and an oil outlet pipe 4 connected to the oil channel in the lubricating oil circuit, the oil outlet of the oil inlet pipe 3 is arranged along the tangent direction of the shell edge so that the oil flowing into the shell forms a vortex in the gas-liquid separation chamber, and the shell is also provided with a regulating mechanism for increasing the gas-liquid vortex speed; by arranging the oil outlet of the oil inlet pipe 3 on the shell along the tangent direction of the shell edge, it is ensured that the oil can rotate in the gas-liquid separation chamber to form a vortex after entering the shell, and at the same time, the oil has a certain initial vortex speed after entering the shell, and then the air bubbles in the oil are separated by the centrifugal principle to ensure that the lubricating energy of the lubricating oil circuit is not affected by the air bubbles; at the same time, an regulating mechanism for increasing the oil vortex speed is also provided in the gas-liquid separation device, and the gas-liquid separation efficiency is accelerated by increasing the vortex speed of the oil.

[0021] In this embodiment, the regulating mechanism includes a rotating blade assembly arranged at the top of the shell, and the rotating blade assembly includes a rotating shaft 5 arranged at the top of the shell and driven to rotate along its own axis, a power source device 7 arranged outside the shell and used to drive the rotating shaft 5 to rotate, and a blade 6 installed at the end of the rotating shaft 5, one end of the rotating shaft 5 equipped with the blade 6 extends into the gas-liquid separation chamber, and the other end of the rotating shaft 5 extends out of the shell and is connected to the power source device 7; combined with Figure 1 As shown, when the oil mixed with bubbles enters the gas-liquid separation chamber in the shell, the power source device 7 starts to work, and the power source device 7 drives the rotating shaft 5 to rotate. Since the blades 6 and the rotating shaft 5 have an interference fit, the rotating shaft 5 will drive the blades 6 to rotate, and finally the oil with an initial swirl velocity is driven to rotate by the rotating blade assembly, thereby further increasing the swirl velocity of the oil and improving the efficiency and quality of gas-liquid separation.

[0022] In this embodiment, the top of the shell is located on the top surface of the gas-liquid separation chamber and is provided with a mounting groove 20. A bearing 8 coaxially arranged with the rotating shaft 5 is provided in the mounting groove 20. A second clamping ring 11 is provided at the opening of the mounting groove 20 and the bearing 8 is axially limited by the second clamping ring 11 and the bottom surface of the mounting groove 20. Figure 1 As shown, a clearance fit is used between the rotating shaft 5 and the bearing 8, and the clearance is filled with lubricating oil. When the rotating shaft 5 rotates, the bearing 8 can act as a hydraulic bearing. At the same time, a retaining ring groove is designed at the opening of the mounting groove 20 for assembling the second retaining ring 11, and the axial movement of the bearing 8 is limited under the combined action of the second retaining ring 11 and the bottom surface of the mounting groove 20.

[0023] In this embodiment, the first clamping ring 10 and the protrusion 9 are respectively provided at the two ends of the rotating shaft 5 that cooperate with the bearing 8 in the vertical direction. The first clamping ring 10 and the protrusion 9 are respectively in contact with the bottom surfaces of the two axial ends of the bearing 8 and limit the axial position of the rotating shaft 5; Figure 1 As shown, a retaining ring groove is provided on the rotating shaft 5 for assembling the first retaining ring 10, and a protrusion 9 is designed at the end surface of the other bearing shell that cooperates with the bearing shell 8, and the axial movement of the rotating shaft 5 is limited by the cooperation between the first retaining ring 10 and the protrusion 9.

[0024] In this embodiment, the top of the housing is provided with a through hole 21 above the mounting groove 20 for the rotating shaft 5 to extend out of the housing, and an oil seal 12 is provided in the through hole 21; Figure 1 As shown, by arranging the oil seal 12 in the through hole, the oil seal 12 is assembled on the housing and prevents the lubricating oil from leaking out when the rotating shaft 5 rotates.

[0025] In this embodiment, the shell includes an upper shell 1 and a lower shell 2, the gas-liquid separation chamber is formed by connecting the upper shell 1 and the lower shell 2, the oil inlet pipe 3 and the rotating blade assembly are arranged on the upper shell 1, and the oil outlet pipe 4 is arranged on the lower shell 2; by designing the shell as a split structure of an upper shell 1 and a lower shell 2, the structure on the upper shell 1 and the lower shell 2 is easily formed, and it is also beneficial to the formation and sealing of the gas-liquid separation chamber.

[0026] In this embodiment, the regulating mechanism further includes a gas-liquid separation diaphragm 13 disposed at the bottom of the shell, the gas-liquid separation diaphragm 13 is integrally formed with the lower shell 2 and has an inner curved surface and an outer curved surface in the radial direction of the lower shell 2, the outer curved surface and the inner side surface of the lower shell 2 are arranged concentrically in the vertical direction, and the inner curved surface is contracted inwardly in the swirl direction 23 of the oil; Figure 1 and Figure 3 As shown, after the swirl velocity of the lubricating oil is further increased by the rotation of the rotating blade assembly, in order to further increase the swirl velocity of the lubricating oil to improve the bubble separation efficiency, an oil-gas separation spacer 13 is designed on the lower shell 2. The oil-gas separation spacer 13 is designed as an integral part of the lower shell 2. The oil-gas separation spacer 13 is divided into two sides in the radial direction of the lower shell 2. The outer curved surface is concentric with the lower shell 2, and the inner curved surface is designed to shrink inwardly. Since the inner curved surface is designed as an inwardly shrinking structure, it can have a compression effect on the lubricating oil passing through the lower shell 2. At the same time, the swirl velocity of the lubricating oil flowing along the inner curved surface will be further increased, and the centrifugal force exerted on the lubricating oil will be further increased, so that the centrifugal force exerted on the bubbles in the lubricating oil is smaller than the centrifugal force exerted on the lubricating oil itself, thereby further gathering the bubbles or the oil with bubbles near the exhaust structure.

[0027] In this embodiment, an exhaust structure is also included at the central axis position of the bottom of the lower shell 2, and the exhaust structure includes a first exhaust channel 14 connected to the gas-liquid separation chamber, a third exhaust channel 16 for discharging the separated gas from the shell, and a second exhaust channel 15 arranged between the first exhaust channel 14 and the third exhaust channel 16, and a plug assembly for connecting or disconnecting the first exhaust channel 14 and the third exhaust channel 16 is arranged in the second exhaust channel 15; the plug assembly includes a fixed plug 18 installed on the lower shell 2, a plug 18 slidably arranged on the lower shell 2, and a plug assembly 19 for connecting or disconnecting the first exhaust channel 14 and the third exhaust channel 16. A movable plug 17 in the second exhaust channel 15 and an elastic member 19 arranged between the fixed plug 18 and the movable plug 17; when the lubricating oil liquid is further increased in speed by the oil-gas separation partition 13, it will be discharged from the shell through the exhaust structure designed on the lower shell 2, wherein the first exhaust channel 14 needs to be designed in the middle of the bottom surface of the lower shell 2; in order to improve the efficiency of the entire system, a plug assembly is designed in the exhaust structure, wherein the plug assembly includes a fixed plug 18 designed at the bottom, a movable plug 17, and an elastic member 19, wherein the elastic member 19 is a spring, and the fixed plug 18 is fixedly installed on the lower shell. When the system pressure is low and the swirl speed of the lubricating oil is insufficient, the centrifugal force on the bubbles is small and the separation efficiency is low. The elastic force of the elastic member 19 on the movable plug 17 is greater than the lubricating oil pressure on the upper part of the fixed plug 18. The movable plug 17 blocks the connecting hole between the first exhaust channel 14 and the second exhaust channel 15 and does not move downward, thereby ensuring the oil supply to the system. When the system pressure is high and the swirl speed is high, the spring force of the elastic member 19 on the movable plug 17 is less than the lubricating oil pressure on the upper part of the fixed plug 18. The movable plug 17 moves downward. At this time, the exhaust channel is opened, and the lubricating oil or gas mixed with bubbles flows out of the system from the exhaust structure, thereby achieving the purpose of improving system efficiency.

[0028] In this embodiment, the oil inlet pipe 3 and the oil outlet pipe 4 are provided with sealing rings 22 at the connecting ends with the oil channel in the lubricating oil circuit; by providing grooves at the connecting ends of the oil inlet pipe 3 and the oil outlet pipe 4 to install the sealing ring 22, a sealed connection with the oil channel in the lubrication system is finally achieved.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A gas-liquid separation device for a lubricating oil circuit, characterized in that: The invention comprises a housing provided in a lubricating oil circuit and having a gas-liquid separation chamber, the housing being of a cylindrical structure and provided with an oil inlet pipe and an oil outlet pipe respectively connected to an oil passage in the lubricating oil circuit, the oil outlet of the oil inlet pipe being provided along a tangent direction of an edge of the housing so that the oil flowing into the housing forms a swirl in the gas-liquid separation chamber, and the housing is also provided with a regulating mechanism for increasing the speed of the gas-liquid swirl; The shell includes an upper shell and a lower shell, and the gas-liquid separation chamber is formed by connecting the upper shell and the lower shell; the regulating mechanism includes a gas-liquid separation partition arranged at the bottom of the lower shell, the gas-liquid separation partition is integrally formed with the lower shell and has an inner curved surface and an outer curved surface in the radial direction of the lower shell, the outer curved surface and the inner side surface of the lower shell are arranged concentrically in the vertical direction, and the inner curved surface is contracted inwardly in the swirl direction of the oil.

2. The lubricating oil circuit gas-liquid separation device according to claim 1, characterized in that: The adjusting mechanism includes a rotating blade assembly arranged on the top of the shell, and the rotating blade assembly includes a rotating shaft arranged on the top of the shell and driven to rotate along its own axis, a power source device arranged on the outside of the shell and used to drive the rotating shaft to rotate, and blades installed at the end of the rotating shaft, one end of the rotating shaft on which the blade is installed extends into the gas-liquid separation chamber, and the other end of the rotating shaft extends out of the shell and is connected to the power source device.

3. The lubricating oil circuit gas-liquid separation device according to claim 2, characterized in that: The top of the shell is provided with a mounting groove on the top surface of the gas-liquid separation chamber, a bearing shell coaxially arranged with the rotating shaft is arranged in the mounting groove, a second clamping ring is arranged at the opening of the mounting groove, and the bearing shell is axially limited by the second clamping ring and the bottom surface of the mounting groove.

4. The lubricating oil circuit gas-liquid separation device according to claim 3, characterized in that: The two ends of the rotating shaft that cooperate with the bearing shell in the vertical direction are respectively provided with a first clamping ring and a protruding portion. The first clamping ring and the protruding portion are respectively in contact with the bottom surfaces of the two axial ends of the bearing shell and limit the axial position of the rotating shaft.

5. The lubricating oil circuit gas-liquid separation device according to claim 3, characterized in that: A through hole is arranged on the top of the housing above the mounting groove, through which the rotating shaft can extend out of the housing, and an oil seal is arranged in the through hole.

6. The lubricating oil circuit gas-liquid separation device according to claim 2, characterized in that: The oil inlet pipeline and the rotating blade assembly are arranged on the upper shell, and the oil outlet pipeline is arranged on the lower shell.

7. The lubricating oil circuit gas-liquid separation device according to claim 1, characterized in that: It also includes an exhaust structure arranged at the central axis position of the bottom of the lower shell, the exhaust structure includes a first exhaust channel connected to the gas-liquid separation chamber, a third exhaust channel for discharging the separated gas out of the shell, and a second exhaust channel arranged between the first exhaust channel and the third exhaust channel, and a plug assembly is arranged in the second exhaust channel for connecting or disconnecting the first exhaust channel and the third exhaust channel.

8. The lubricating oil circuit gas-liquid separation device according to claim 7, characterized in that: The plug assembly includes a fixed plug mounted on the lower shell, a movable plug slidably arranged in the second exhaust passage, and an elastic member arranged between the fixed plug and the movable plug.

9. The lubricating oil circuit gas-liquid separation device according to claim 1, characterized in that: The oil inlet pipeline and the oil outlet pipeline are provided with sealing rings at the connection ends with the oil passage in the lubricating oil circuit.

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