Pressure regulating type oil-gas separation structure

Abstract

The utility model provides a pressure regulating type oil-gas separation structure. An initial separation channel cavity and a subdivided channel cavity are divided by a subdivided separation unit; the fine separation unit comprises a separation plate, a filter element containing groove is fixedly connected to a plate body, facing the subdivided channel cavity, of the upper portion of the separation plate, the filter element is pressed and sealed in the filter element containing groove, and a plurality of vent holes communicated with the filter element containing groove are formed in a plate body, facing the primary separation channel cavity, of the upper portion of the separation plate. An air outlet and oil outlet hole is formed in the downward groove wall of the filter element containing groove, a one-way pressure relief assembly is further arranged on the lower portion of the partition plate, the one-way pressure relief assembly is reversely communicated in the one-way direction from the primary separation channel cavity to the subdivided channel cavity, and the one-way pressure relief assembly can be communicated when certain pressure is reached. The oil-gas separation device is simple in structure and reliable in performance, oil-gas separation and backflow of oil drops to the crankcase can be effectively carried out, the channel bottleneck can be eliminated, the special working condition that the gas flow rate is suddenly increased is effectively dealt with, and the abnormal increase of the pressure of the crankcase and the influence on the separation efficiency are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of engines, and in particular relates to a pressure-regulated oil-gas separation structure. Background Art

[0002] When the engine is working, the high-pressure combustible mixture and the burned gas in the combustion chamber will leak into the crankcase through the gap between the piston group and the cylinder to a certain extent, causing blowby. The components of the engine blowby are unburned fuel gas, water vapor and exhaust gas. If the engine blowby is not separated and discharged in time, the following problems will occur:

[0003] For the engine, firstly, it will dilute the engine oil, reduce the performance of the engine oil, and accelerate the oxidation and deterioration of the engine oil; secondly, water vapor condenses in the engine oil, forming sludge and blocking the oil circuit; thirdly, the acidic gas in the exhaust gas mixes into the lubrication system, causing corrosion and accelerated wear of engine parts; in addition, the blowby gas will also make the crankcase pressure too high and destroy the crankcase seal, causing the engine oil to leak and lose. In terms of environmental protection, if the engine blowby gas is directly discharged into the atmosphere without oil and gas separation, it will also cause environmental pollution.

[0004] In the prior art, an ordinary oil-gas separator structure in combination with a PRV valve 300 can solve the oil-gas separation, oil droplet recovery and gas discharge under normal working conditions. However, when the gas flow rate suddenly increases under special working conditions, the ordinary oil-gas separator structure becomes a bottleneck because only the only channel where the filter element is located can pass through. This not only causes an abnormal increase in crankcase pressure, but also affects the separation efficiency of the filter element. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model provides the following technical solutions:

[0006] The pressure regulating oil-gas separation structure is characterized in that the upper and lower shells jointly enclose a main channel, and the main channel is divided into an intake channel cavity, a primary separation channel cavity and a subdivided channel cavity which are connected in sequence, and the primary separation channel cavity and the subdivided channel cavity are divided by a fine separation unit;

[0007] The fine separation unit includes a partition plate, an upper portion of the partition plate facing the subdivided channel cavity is fixedly connected with a filter element accommodating groove, the filter element is pressed and sealed in the filter element accommodating groove, an upper portion of the partition plate facing the primary separation channel cavity is provided with a plurality of air vents connected with the filter element accommodating groove, an air and oil outlet hole is provided on the groove wall of the filter element accommodating groove facing downward, and a one-way pressure relief component is also arranged at the lower portion of the partition plate, the conduction is in a single direction from the primary separation channel cavity to the subdivided channel cavity, and conduction can only be achieved when a certain pressure is reached.

[0008] Furthermore, the one-way pressure relief assembly includes a piston sleeve, a piston, a spring and a guide cylinder. The piston sleeve is integrally formed at the lower part of the partition plate, the guide cylinder is relatively fixed to the piston sleeve, the piston includes a piston disc, and a plurality of guide claws extending in advance are spaced apart on the periphery of the front disc surface of the piston disc. The piston is slidably matched with the piston sleeve through the plurality of guide claws. The half of the barrel opening of the piston sleeve facing the initial separation channel cavity is closed by the barrel opening half-sealing plate, and the limiting of the front of the piston as a whole is achieved by abutting against the front end of the guide claw. A conical sealing surface is also formed on the periphery of the front surface of the piston disc, which can abut and seal the barrel opening of the piston sleeve. A piston guide rod is fixedly connected to the disc surface at the other end of the piston disc, and the piston guide rod extends into the guide cylinder. The spring is sleeved on the piston guide rod, and the two ends of the spring respectively abut against the guide cylinder and the piston disc.

[0009] Furthermore, the guide cylinder is integrally fixed to the lower portion of the support plate, and the lower end of the support plate and the lower end of the partition plate are respectively fixedly connected to the horizontal oil collecting plate.

[0010] Furthermore, a plurality of oil dripping holes are provided on the horizontal oil collecting plate.

[0011] Furthermore, a vertical plate portion extending in a vertical direction is fixedly provided on the horizontal oil collecting plate.

[0012] Furthermore, a slot cover portion for pressing and sealing the filter element in the filter element accommodating slot is integrally formed on the upper portion of the bracket plate.

[0013] Furthermore, the lower shell body is integrally formed with an intake cylinder body extending from bottom to top into the intake channel cavity, the air inlet port is opened at the bottom of the intake cylinder body, the inner cavity formed by the intake cylinder body serves as the intake channel cavity, and a gap is left between the outer walls of the cylinder circumference and the top of the intake cylinder body and the inner wall of the intake channel cavity, and the cylinder bottom is coplanar with the bottom wall of the intake channel cavity; a connecting port for connecting the intake channel cavity with the initial separation channel cavity is opened at the top of the intake cylinder body.

[0014] Furthermore, the connecting port is located directly above the air inlet, and the connecting port and the air inlet occupy half of the area of ​​the bottom and top of the air inlet cylinder respectively, and a semi-enclosed plate is also provided between the connecting port and the air inlet in the cylinder, so that the air inlet channel cavity in the cylinder forms a serpentine extending channel.

[0015] Furthermore, an oil baffle plate extending downward from the top of the cavity is fixed in the cavity of the primary separation channel, and the oil baffle plate is arranged between the air intake cylinder and the fine separation unit.

[0016] Furthermore, a first oil return hole is provided at the bottom of the initial separation channel cavity. The first oil return hole is provided at the bottom of the initial separation channel cavity between the air intake cylinder far away from the fine separation unit and the initial separation channel cavity.

[0017] The utility model has a simple structure and reliable performance. It can effectively separate oil and gas and return oil droplets to the crankcase, and can also eliminate the bottleneck of the passage, effectively cope with the special working condition of sudden increase of gas flow rate, and avoid abnormal increase of crankcase pressure and influence on separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation on the present invention. A person of ordinary skill in the art can obtain other relevant drawings based on these drawings without making any creative effort.

[0019] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0020] Figure 2 It is a top view schematic diagram of the lower shell and the fine separation unit;

[0021] Figure 3 It is an exploded schematic diagram of the lower shell and the fine separation unit.

[0022] Reference numerals in the figures:

[0023] Lower housing 100; upper housing 200; PRV valve 300;

[0024] Air inlet 1; air inlet cylinder 2; air inlet channel cavity 3; semi-enclosed plate 4; connecting port 5; primary separation channel cavity 6; oil baffle plate 7; fine separation unit 8; subdivided channel cavity 9; first oil return hole 10; second oil return hole 11;

[0025] Partition plate 81; filter element receiving groove 811; vent hole 812; piston sleeve 813; cylinder mouth semi-sealing plate 8131;

[0026] Support plate 82; slot cover portion 821; guide cylinder portion 822;

[0027] Horizontal oil collecting plate 83; oil dripping hole 831; vertical plate portion 832;

[0028] Filter element 84;

[0029] Piston plate 85; piston guide rod 851; guide claw 852;

[0030] Spring 86. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0032] In the description of the embodiments of the present invention, it should be noted that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the application product is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present invention or simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] The term "plurality" in the present invention refers to more than two (including two). The terms "first", "second" and the like are only used to distinguish descriptions and should not be understood as indicating or implying relative importance.

[0034] Unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0036] As shown in the figure, the lower shell 100 and the upper shell 200 jointly enclose a main channel, an air inlet 1 is provided at the lower right side of the main channel, and the main channel is divided into an air inlet channel cavity 3, a primary separation channel cavity 6 and a subdivided channel cavity 9 which are connected in sequence, wherein the lower shell 100 is integrally formed with an air inlet cylinder 2 extending from bottom to top into the air inlet channel cavity 3, the air inlet 1 is provided at the bottom of the air inlet cylinder 2, and the inner cavity enclosed by the air inlet cylinder 2 serves as the air inlet channel cavity 3, and a space is left between the outer wall of the cylinder circumference and the cylinder top of the air inlet cylinder 2 and the inner wall of the cavity of the air inlet channel cavity 3 The bottom of the cylinder is coplanar with the bottom wall of the air intake channel cavity 3; the top of the air intake cylinder body 2 is provided with a connecting port 5 for connecting the air intake channel cavity 3 with the primary separation channel cavity 6. Preferably, the connecting port 5 is located directly above the air intake port 1, and the connecting port 5 and the air intake port 1 respectively occupy half of the area of ​​the bottom and top of the air intake cylinder body 2, and a semi-enclosed plate 4 is further provided inside the cylinder between the connecting port 5 and the air intake port 1, so that a serpentine extension channel is formed inside the cylinder, i.e., the air intake channel cavity 3, thereby zigzagging the passage path of the blowby gas entering from the air intake port to avoid direct impact.

[0037] The primary separation channel cavity 6 and the subdivided channel cavity 9 are divided by a fine separation unit 8 .

[0038] An oil baffle plate 7 extending downward from the top of the primary separation channel cavity 6 is fixed in the cavity. The oil baffle plate 7 is arranged between the intake cylinder 2 and the fine separation unit 8. The function of the oil baffle plate 7 is to absorb and separate large oil droplets in the blow-by gas. The large oil droplets drip from the oil baffle plate 7 by gravity. Figure 2As shown, a first oil return hole 10 is opened at the bottom of the initial separation channel cavity 6, and the bottom of the initial separation channel cavity 6 is arranged to be inclined and converged toward the first oil return hole 10, so that the first oil return hole 10 can return the oil droplets recovered by the initial separation to the crankcase.

[0039] It should be noted that the reason why the intake cylinder body 2 adopts a structural design that extends from bottom to top into the primary separation channel cavity 6 and leaves a gap between the outer walls of the cylinder side and the cylinder top of the intake cylinder body 2 and the inner wall of the intake channel cavity 3 is also to consider using its cylinder outer wall to act as an oil baffle, thereby further enhancing the primary separation ability of the primary separation channel cavity 6.

[0040] Preferably, the first oil return hole 10 is opened at the bottom of the primary separation channel cavity 6 between the air intake cylinder 2 and the primary separation channel cavity 6 away from the fine separation unit 8, so as to better collect the oil.

[0041] See also Figure 3 As shown, the fine separation unit 8 includes a partition plate 81, which is fixed between the primary separation channel cavity 6 and the subdivided channel cavity 9, and is responsible for dividing the two channel cavities. A filter element receiving groove 811 is fixedly connected to the plate body of the upper part of the partition plate 81 facing the subdivided channel cavity 9, and the filter element 84 is received in the filter element receiving groove 811, and the filter element is pressed and sealed in the filter element receiving groove 811 by the groove cover part 821. The upper part of the partition plate 81 facing the primary separation channel cavity 6 is provided with a plurality of plate bodies corresponding to the primary separation channel cavity 6. The filter element receiving groove 811 is connected to the air vent 812, and the filter element receiving groove 811 is provided with an air outlet and oil outlet hole (not shown in the figure). The gas in the initial separation channel cavity 6 enters the filter element receiving groove 811 through the air vent 812, and the small particles of oil droplets in the gas are adsorbed and separated by the filter element 84 in the groove. The filtered gas is discharged from the air outlet and oil outlet hole into the subdivided channel cavity 9, and the oil droplets separated by the filter element 84 also drip out from the air outlet and oil outlet hole under the action of gravity.

[0042] A one-way pressure relief component is also provided at the lower part of the partition plate 81. The reverse direction of conduction is from the primary separation channel cavity 6 to the subdivided channel cavity 9 in one direction, and conduction can only be achieved after reaching a certain pressure. That is, under special working conditions where the gas flow rate suddenly increases, this one-way pressure relief component can be opened to allow part of the gas to pass through, thereby alleviating the pressure of the channel where the filter element is located, eliminating bottlenecks, and avoiding abnormal increase in crankcase pressure. Of course, part of the gas passing through the one-way pressure relief component will miss the fine separation of the filter element, but it is also acceptable compared to the seal damage caused by abnormal increase in crankcase pressure.

[0043] The utility model provides a simple one-way pressure relief component structure, as shown in the figure, including a piston sleeve 813, a piston, a spring 86 and a guide cylinder 822, the piston sleeve 813 is integrally formed at the lower part of the partition plate 81, the guide cylinder 822 is relatively fixed to the piston sleeve 813, the piston includes a piston disc 85, the front disc surface of the piston disc 85 is spaced apart at intervals by a plurality of guide claws 852 extending in advance, the piston is slidably matched with the piston sleeve 813 through the plurality of guide claws 852, the half of the cylinder mouth of the piston sleeve 813 facing the initial separation channel cavity 6 is closed by the cylinder mouth half-sealing plate 8131, so that the cylinder mouth can be controlled to reduce The air intake volume can also be limited in front of the entire piston by abutting against the front end of the guide claw 852. A conical sealing surface is also formed on the periphery of the front surface of the piston disk 85, so that the other end of the cylinder mouth of the piston sleeve 813 toward the subdivided rear channel cavity 9 can be sealed by abutting. A piston guide rod 851 is fixedly connected to the disk surface of the other end of the piston disk 85, and the piston guide rod 851 extends into the guide cylinder portion 822. The spring 86 is sleeved on the piston guide rod 851, and the two ends of the spring respectively abut against the guide cylinder portion 822 and the piston disk 85, providing sealing and reset elastic force for the piston. The pressure relief pressure threshold setting of this structure is mainly determined by the elastic force of the selected spring.

[0044] When the air pressure in the separation channel cavity 6 suddenly increases to the pressure relief threshold, the pressure overcomes the spring force to push open the piston disc 85 to release the blockage of the piston sleeve 813, and the gas enters the subdivided channel cavity 9 through the gap between the guide claws 852. After the pressure is released, the spring resets the piston and reseals it.

[0045] Preferably, the guide cylinder 822 is integrally fixed to the lower part of the bracket plate 82, and the lower end of the bracket plate 82 and the lower end of the partition plate 81 are respectively fixed to the horizontal oil collecting plate 83. Since the horizontal oil collecting plate 83 is located directly below the filter element receiving groove 811 and the one-way pressure relief assembly, it can use its own plate body to receive the oil droplets dripping from the filter element, and can also play a role similar to an oil baffle plate for the gas released from the gas and oil outlet holes and the pressure relief assembly below the filter element receiving groove 811, and absorb the oil droplets in the gas.

[0046] Furthermore, a plurality of oil dripping holes 831 are provided on the horizontal oil collecting plate 83 so that the oil droplets adsorbed and separated on the horizontal oil collecting plate 83 can drip from the oil dripping holes 831 to the bottom of the subdivided channel cavity 9 by gravity.

[0047] Preferably, in order to enhance the adsorption effect, a vertical plate portion 832 extending in the vertical direction is fixedly provided on the horizontal oil collecting plate 83 .

[0048] Preferably, to make the structure more compact, for the bracket plate 82 vertically fixed to the horizontal oil collecting plate 83 , the groove cover portion 821 is integrally formed as the upper portion of the bracket plate 82 , and the guide cylinder portion 822 is integrally formed at the lower portion of the bracket plate 82 .

[0049] Combination Figure 2 As shown, a second oil return hole 11 is opened at the bottom of the subdivided channel cavity 9, and the bottom of the subdivided channel cavity 9 is arranged to be inclined and converged toward the second oil return hole 11, so that the second oil return hole 11 can return the oil droplets recovered by the initial separation to the crankcase.

[0050] Preferably, the second oil return hole 11 is opened in the post-segmentation channel cavity 9 at the cavity bottom away from the fine separation unit 8, so as to better collect the oil.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Pressure regulating oil and gas separation structure, characterized in that: The upper and lower shells together enclose a main channel, which is further divided into an air intake channel chamber (3), a primary separation channel chamber (6) and a subdivided channel chamber (9) which are connected in sequence, and the primary separation channel chamber and the subdivided channel chamber are divided by a fine separation unit (8); The fine separation unit comprises a partition plate (81), a filter element receiving groove (811) is fixedly connected to the plate body of the upper portion of the partition plate facing the subdivided channel cavity, the filter element is pressed and sealed in the filter element receiving groove, a plurality of vent holes (812) connected to the filter element receiving groove are provided on the plate body of the upper portion of the partition plate facing the primary separation channel cavity, and air and oil outlet holes are provided on the groove wall of the filter element receiving groove facing downward, and a one-way pressure relief component is also provided at the lower portion of the partition plate, the conduction direction is one-way from the primary separation channel cavity to the subdivided channel cavity, and conduction can only be achieved when a certain pressure is reached.

2. The pressure regulating oil-gas separation structure according to claim 1, characterized in that: The one-way pressure relief assembly includes a piston sleeve (813), a piston, a spring (86) and a guide cylinder (822). The piston sleeve is integrally formed at the lower part of the partition plate. The guide cylinder is relatively fixed to the piston sleeve. The piston includes a piston disc (85). A plurality of guide claws (852) extending in advance are arranged at intervals on the periphery of the front disc surface of the piston disc. The piston is slidably matched with the piston sleeve through the plurality of guide claws. The half of the barrel opening of the piston sleeve facing the initial separation channel cavity is closed by the barrel opening half-sealing plate (8131). The front of the piston is limited by the abutment with the front end of the guide claw. A conical sealing surface is also formed on the periphery of the front surface of the piston disc, which can abut and seal the barrel opening of the piston sleeve. A piston guide rod (851) is fixedly connected to the disc surface at the other end of the piston disc. The piston guide rod extends into the guide cylinder. The spring is sleeved on the piston guide rod, and the two ends of the spring abut against the guide cylinder and the piston disc respectively.

3. The pressure regulating oil-gas separation structure according to claim 2, characterized in that: The guide cylinder is integrally fixed to the lower part of the support plate, and the lower end of the support plate and the lower end of the partition plate are respectively fixedly connected to the horizontal oil collecting plate (83).

4. The pressure regulating oil-gas separation structure according to claim 3, characterized in that: A plurality of oil drip holes are provided on the horizontal oil collecting plate.

5. The pressure regulating oil-gas separation structure according to claim 3, characterized in that: A vertical plate portion (832) extending in the vertical direction is also fixedly provided on the horizontal oil collecting plate.

6. The pressure regulating oil-gas separation structure according to claim 3, characterized in that: The slot cover part used for pressing and sealing the filter element in the filter element accommodating slot is integrally formed on the upper part of the bracket plate.

7. The pressure regulating oil-gas separation structure according to claim 1, characterized in that: The lower shell (100) is integrally formed with an air intake cylinder (2) extending from bottom to top into the air intake channel cavity, the air intake port (1) is provided at the bottom of the air intake cylinder, the inner cavity formed by the air intake cylinder serves as the air intake channel cavity, a gap is left between the outer wall of the cylinder circumference and the cylinder top of the air intake cylinder and the inner wall of the air intake channel cavity, and the cylinder bottom is coplanar with the bottom wall of the air intake channel cavity; a connecting port (5) for connecting the air intake channel cavity with the initial separation channel cavity is provided at the cylinder top of the air intake cylinder.

8. The pressure regulating oil-gas separation structure according to claim 7, characterized in that: The connecting port is located directly above the air inlet, and the connecting port and the air inlet occupy half of the area of ​​the bottom and top of the air inlet cylinder respectively. A semi-enclosed plate (4) is also provided between the connecting port and the air inlet in the cylinder, so that the air inlet channel cavity in the cylinder forms a serpentine extending channel.

9. The pressure regulating oil-gas separation structure according to claim 7, characterized in that: An oil baffle plate (7) extending downward from the top of the cavity is fixed in the cavity of the primary separation channel, and the oil baffle plate is arranged between the air intake cylinder and the fine separation unit.

10. The pressure regulating oil-gas separation structure according to claim 7, characterized in that: A first oil return hole (10) is provided at the bottom of the primary separation channel cavity. The first oil return hole is provided at the bottom of the primary separation channel cavity between the air intake cylinder body far away from the fine separation unit and the primary separation channel cavity.

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