Oil-gas separation structure

Abstract

The utility model provides an oil-gas separation structure which is characterized in that a plurality of fishbone type baffles which are arranged in parallel at intervals are arranged in a shell, the top end of each fishbone type baffle is fixedly connected with the top wall of the shell, and the whole plate body of each fishbone type baffle vertically extends from the top end to an oil return port below; the cross section of each plate body extends from the air inlet of the shell to the air outlet in a wave mode, a bent thorn part is fixedly arranged at each of the wave crest and the wave trough, the protruding direction of each bent thorn part is consistent with the protruding direction of the wave crest or the wave trough, and each bent thorn part is bent and extends towards the air inlet. The device is simple in structure, reliable in performance and very convenient to mount and dismount; through the structural design of the wave-shaped fishbone type baffle and the bent thorn part of the wave-shaped fishbone type baffle, the oil-gas contact and collision action area is increased, the oil-gas contact and collision action time is prolonged, the oil drop adsorption capacity is enhanced, and the oil-gas separation efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engines, and particularly relates to an oil-gas separation structure and a fishbone type coarse separation unit thereof. Background Art

[0002] With the progress of society, the automotive industry has developed better and better, and there are more and more cars. When there are more cars, the emissions of cars are more, and the environmental pollution is becoming more and more serious. Now the international requirements for vehicle emissions are becoming stricter and stricter. In such an environment, it is a severe challenge for engine components related to emissions. Improving the oil-gas separation efficiency can reduce the oil content in the gas and reduce the emissions of harmful substances.

[0003] The existing oil-gas separation solution is a separation structure composed of a baffle plate and an orifice plate. First, a simple baffle plate is set at the inlet position, and then the orifice plate is set to make the gas collide with the baffle plate and the orifice plate, adsorb the oil droplets in the oil-gas on the product surface, and then return the oil to the crankcase through the oil return port to avoid the oil being carried out. The disadvantages are as follows: the oil-gas separation efficiency is low, and the simple orifice plate plus baffle plate structure cannot effectively separate small particle oil droplets. Therefore, the separation efficiency is low; in order to meet the oil-gas separation efficiency, this structure will cause the pressure loss to become larger, affecting the engine performance. Content of the Utility Model

[0004] In view of the problems existing in the prior art, the utility model provides the following technical solutions:

[0005] A fishbone type coarse separation unit, characterized in that it includes a housing, the housing is respectively formed with an air inlet, an air outlet and an oil return port located at the lower side, and a plurality of fishbone type baffle plates arranged in parallel at intervals are arranged in the housing. The top end of each fishbone type baffle plate is fixedly connected to the top wall of the housing, and the whole plate body of each fishbone type baffle plate extends vertically downward from the top end to the oil return port. The cross section of each plate body extends in a wave shape from the air inlet of the housing to the air outlet, and a bent thorn part is fixedly provided at the wave crest and the wave trough respectively. The protruding direction of each bent thorn part is consistent with the protruding direction of the wave crest or the wave trough and extends toward the air inlet in a bent manner.

[0006] Further, the inter-plate channel between two adjacent fishbone type baffle plates also extends in a wave shape from the air inlet of the housing to the air outlet.

[0007] Further, when the inter-plate channel passes through the bent thorn part, the channel width here is blocked by the bent thorn part and reduced.

[0008] Further, the bent thorn part blocks at least half of the channel width of the inter-plate channel.

[0009] Further, an eddy current area is formed between the plate surface of the bent thorn part facing the air inlet and the surface of the plate body where the root of the bent thorn part is located.

[0010] The present utility model further provides an oil-gas separation structure, which is characterized in that the oil-gas separation channel inside the valve cover is divided into a front-side rough separation area and a rear-side fine separation area by a partition board, and the fishbone-type rough separation unit as described above is arranged in the rough separation area.

[0011] Furthermore, it further includes a fine separation unit arranged in the fine separation area. The fine separation unit uses the partition board as an installation base. A filter element accommodating groove is fixedly arranged on one side surface of the partition board facing the fine separation area. An air inlet hole communicating with the filter element accommodating groove is opened on the partition board. A plurality of vertical and spaced-apart grid bars are fixedly arranged on the air inlet hole. The lower part of the grid bar is bent backward and horizontally extends to form a support part. A plurality of spaced-apart support plate parts serve as the lower side wall of the filter element accommodating groove. The inter-plate gap between adjacent two support parts serves as an air outlet hole. The filter element is accommodated in the filter element accommodating groove and is supported and bottomed by each support part. The rear cover plate presses and seals the filter element in the filter element accommodating groove.

[0012] Furthermore, a clamping groove is fixedly arranged on the rear cover plate, and a corresponding clamping bar is arranged on the filter element accommodating groove. The rear cover plate and the filter element accommodating groove are fixed by the embedding and clamping of the clamping bar 531 and the clamping groove.

[0013] Furthermore, a horizontally extending horizontal oil collecting plate is also arranged directly below each support part of the filter element accommodating groove, and the front end of the horizontal oil collecting plate is fixedly connected to the partition board.

[0014] Furthermore, a plurality of oil dripping holes are opened on the horizontal oil collecting plate.

[0015] Furthermore, a vertically extending vertical plate part is also fixedly arranged on the horizontal oil collecting plate.

[0016] The structure of the present utility model is simple and concise, with reliable performance, and is very convenient for installation and disassembly; the structural design of the wavy fishbone baffle and its bent thorn part increases the contact and collision area and time of the oil and gas, enhances the adsorption capacity of the oil droplets, and improves the oil-gas separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic cross-sectional view of the valve cover 1;

[0019] Figure 2 It is a schematic top cross-sectional structure view of the fishbone-type rough separation unit 4, and the housing 41 is hidden in the figure;

[0020] Figure 3 It is an exploded view of the fine separation unit 5.

[0021] Reference numerals in the figure:

[0022] Valve cover 1; Oil-gas separation channel 2; Coarse separation area 21; Fine separation area 22;

[0023] Coarse separation oil return tank 31; Fine separation oil return tank 32;

[0024] Fishbone-type coarse separation unit 4; Housing 41;

[0025] Fishbone baffle 42; Wave crest 421; Wave crest 423; Wave trough 422; Bent thorn part 424;

[0026] Inter-plate channel 43; Eddy current area 431;

[0027] Fine separation unit 5; Partition board 51; Horizontal oil collecting plate 52; Oil dripping hole 521; Filter element accommodating groove 53; Clamping strip 531; Rear cover plate 54; Clamping groove 541; Filter element 55; Grid strip 56; Support part 561; Vertical plate part 57. Specific embodiments

[0028] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0029] In the description of the embodiments of the present invention, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. 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 operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0030] "Multiple" as used in the present invention means two or more (including two). Terms such as "first" and "second" are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0031] Unless otherwise clearly defined and limited, the terms "set", "install", and "connect" 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.

[0032] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0033] As Figure 1As shown, the oil-gas separation channel 2 inside the valve cover 1 is separated by a partition plate 51 into a front-side rough separation area 21 and a rear-side fine separation area 22. The unseparated mixed gas enters the rough separation area 21. After passing through the fishbone-type rough separation unit 4, large oil droplets flow into the rough separation oil return tank 31 under the action of gravity, and then flow into the crankcase through the rough separation oil return hole; the remaining mixed gas enters the fine separation area 22 after passing through the fine separation unit 5 installed on the partition plate 51. The particulate oil droplets after being finely separated by the fine separation unit 5 flow into the fine separation oil return tank 32 under the action of gravity, and then flow into the crankcase through the fine separation oil return hole.

[0034] Combined Figure 1 and Figure 2 As shown, the fishbone-type rough separation unit 4 includes a housing 41. The housing 41 is respectively formed with an air inlet at the front side, an air outlet at the rear side, and an oil return port at the lower side (not shown in the figure). A plurality of parallel and spaced fishbone baffles 42 are arranged inside the housing 41. The top end of each fishbone baffle 42 is fixedly connected to the top wall of the housing 41. The plate body of each fishbone baffle 42 extends vertically downward from the top end to the oil return port. The cross-section of each plate body extends in a wave shape from the air inlet of the housing 41 to the air outlet. And at the wave crests (421, 423) and wave troughs 422, a bent thorn portion 424 is respectively fixed. The protruding direction of each bent thorn portion 424 is consistent with the protruding direction of the wave crest or wave trough and bends and extends toward the air inlet. For example Figure 2 in the bent thorn portion 424 at the wave crests (421, 423), its overall protruding direction is consistent with the protruding direction of the wave crest. That is to say, the bent thorn portion 424 at the wave crest is arranged on one side surface of the plate body consistent with the protruding direction of the wave crest, while the bent thorn portion at the wave trough 422 is arranged on the other side surface of the plate body consistent with the protruding direction of the wave trough; the inter-plate channel 43 between two adjacent fishbone baffles 42 also extends in a wave shape from the air inlet of the housing 41 to the air outlet. And when the inter-plate channel 43 passes through the bent thorn portion 424, the channel width here is blocked and reduced by the bent thorn portion 424. Preferably, the bent thorn portion 424 blocks at least half of the channel width of the inter-plate channel 43. And because the bent thorn portion 424 bends and extends toward the air inlet, an eddy current area 431 is formed between the plate surface of the bent thorn portion 424 facing the air inlet and the surface of the plate body where the root of the bent thorn portion 424 is located, increasing the effective contact and collision time of the oil-gas with the plate body and further enhancing the adsorption capacity for oil droplets.

[0035] The oil and gas entering the herringbone type coarse separation unit 4 from the air inlet of the shell 41 are discharged from the air outlet after passing through the multiple wave-like extending inter-plate channels 43, the partially blocked curved thorn portions 424 in the channels, and the formed vortex areas. The large particle oil droplets adsorbed by the multiple herringbone baffles 42 drip out of the herringbone type coarse separation unit 4 through the oil return port downward along the plate body due to the action of gravity, flow into the coarse separation return oil groove 31, and then flow into the crankcase through the coarse separation return oil hole.

[0036] Compared with a single baffle, the fishbone type rough separation unit 4 structure of the utility model has a stronger adsorption capacity for oil droplets and a better oil-gas rough separation effect.

[0037] Combination Figure 1 and Figure 3 As shown, the fine separation unit 5 of the utility model uses a partition 51 as an installation base, and a filter element accommodating groove 53 is fixedly provided on the plate surface of the side of the partition 51 facing the fine separation area 22, and an air inlet hole connected to the filter element accommodating groove 53 is opened on the partition 51, and a plurality of vertical and spaced-apart grille bars 56 are fixedly provided at the air inlet hole, and the lower part of the grille bars 56 is bent backward and horizontally extends to form a support portion 561, and a plurality of spaced-apart support plate portions 561 are used as the lower side groove wall of the filter element accommodating groove 53, and the inter-plate gap between two adjacent support plate portions 561 is used as an air outlet, and the filter element 55 is accommodated in the filter element accommodating groove 53 and supported by each support portion 561, and the rear cover plate 54 presses the filter element 55 and seals it in the filter element accommodating groove 53.

[0038] The gas in the coarse separation area 21 enters the filter element receiving groove 53 through the gaps between the grid bars 56 in the air holes of the partition 51, and the small particles of oil droplets in the gas are adsorbed and separated by the filter element 55 in the groove. The filtered gas is discharged from the gaps between the plates between the support parts 561 below and enters the fine separation area 22. The oil droplets separated by the filter element 55 also drip out from the gaps between the plates between the support parts 561 under the action of gravity, or drip out downward along the plate body of the support part 561.

[0039] Specifically, a snap-in groove 541 is fixedly provided on the rear cover plate 54, and a corresponding snap-in strip 531 is provided on the filter element receiving groove 53. The snap-in strip 531 is embedded and snap-fitted with the snap-in groove 541, thereby fixing the rear cover plate 54 and the filter element receiving groove 53, and facilitating disassembly.

[0040] Furthermore, a horizontally extending horizontal oil collecting plate 52 is provided directly below each supporting portion 561 of the filter element receiving groove 53, and the front end of the horizontal oil collecting plate 52 is fixedly connected to the partition plate 51. Since the horizontal oil collecting plate 52 is located directly below the air outlet hole (the inter-plate channel between each supporting portion 561) of the filter element receiving groove 53, 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 discharged from the filter element receiving groove 53, and absorb the oil droplets in the gas.

[0041] Furthermore, a plurality of oil dripping holes 521 are formed in the horizontal oil collecting plate 52, so that the oil droplets adsorbed and separated on the horizontal oil collecting plate 52 drip onto the fine separation oil return tank 32 through the oil dripping holes 521 by gravity.

[0042] Preferably, in order to enhance the adsorption effect, a vertical plate portion 57 extending in the vertical direction is also fixed on the horizontal oil collecting plate 52.

[0043] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Oil and gas separation structure, characterized in that: The oil-gas separation passage inside the valve chamber cover is divided into a rough separation zone at the front side and a fine separation zone at the rear side by a partition (51); a herringbone-type rough separation unit is arranged in the rough separation zone, and the herringbone-type rough separation unit comprises a plurality of herringbone-type baffles arranged in parallel and spaced apart in a shell; the top of each herringbone-type baffle is fixedly connected to the top wall of the shell; the plate body of each herringbone-type baffle (42) extends vertically from the top to the oil return port below; the cross section of each plate body extends in a wave-like manner from the air inlet of the shell to the air outlet; and A curved thorn portion (424) is fixedly provided at each of the wave crests (421, 423) and the wave troughs (422), and the protruding direction of each curved thorn portion is consistent with the protruding direction of the wave crest or the wave trough and is bent and extended toward the air inlet. The inter-plate channel between two adjacent fishbone-type baffles also extends in a wave-like manner from the air inlet of the shell to the air outlet. A vortex zone is formed between the plate surface of the curved thorn portion facing the air inlet and the surface of the plate body where the root of the curved thorn portion is located. When the inter-plate channel passes through the curved thorn portion, the channel width at this location is blocked by the curved thorn portion and is reduced by at least half. The fine separation unit is also provided in the fine separation area. The fine separation unit uses a partition plate (51) as an installation base. A filter element receiving groove (53) is fixedly provided on a plate surface of the partition plate facing the fine separation area. An air inlet hole connected to the filter element receiving groove (53) is opened on the partition plate (51). The air inlet hole is fixedly provided with a plurality of vertical and spaced grid bars (56). The lower part of the grid bar (56) is bent backward and horizontally extends to form a support portion (561). The support portion (561) serves as the lower groove wall of the filter element receiving groove, and the inter-plate gap between two adjacent support portions (561) serves as an air outlet. The filter element is received in the filter element receiving groove and supported by each support portion (561). The rear cover plate presses and seals the filter element in the filter element receiving groove. A clamping groove is fixedly provided on the rear cover plate, and a corresponding clamping strip is provided on the filter element receiving groove. The clamping strip (531) is embedded and clamped with the clamping groove, thereby fixing the rear cover plate to the filter element receiving groove.

2. The oil-gas separation structure according to claim 1, characterized in that: A horizontally extending horizontal oil collecting plate (52) is also provided directly below each supporting portion of the filter element receiving groove, and the front end of the horizontal oil collecting plate is fixedly connected to the partition plate; a plurality of oil dripping holes are provided on the horizontal oil collecting plate.

3. The oil-gas separation structure according to claim 2, characterized in that: A vertical plate portion (57) extending in a vertical direction is also fixedly provided on the horizontal oil collecting plate.

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