CN214618970U - Flushing oil tank with liquid buffer mechanism - Google Patents

Abstract

The utility model provides a flushing oil tank with a liquid buffer mechanism, which comprises an oil tank shell with a hollow cavity, a liquid buffer mechanism movably embedded at the top of the oil tank shell, and a first baffle plate and a second baffle plate which are transversely arranged in the oil tank shell, wherein the oil tank shell is equally divided into three equal parts by the first baffle plate and the second baffle plate, and is mutually communicated and used for containing a first containing cavity, a second containing cavity and a third containing cavity of lubricating oil; the liquid buffer mechanism includes: the first oil return pipe is formed on a cover plate at the bottom of the first oil return pipe, the support is vertically and downwards arranged from the cover plate, the two side plates are clamped by the support and are arranged in parallel, the guide plates are clamped by the two side plates, and the guide plates and the side plates form falling holes which are alternately arranged in the vertical direction. The utility model discloses an utensil liquid buffer gear's flushing tank, the impact and the vibration that cause to the lubricating oil of the inside holding of flushing tank when can effectively reduce the lubricating oil of carrying the backward flow.

Description

Flushing oil tank with liquid buffer mechanism

Technical Field

The utility model relates to a sealed oil station field, more specifically relates to an utensil liquid buffer gear's flushing tank.

Background

The flushing oil tank is a device for storing, recycling and reusing lubricating oil in a lubricating oil circulating system and keeping the hydraulic balance of the lubricating oil circulating system. In order to recycle the oil, an oil return pipe is required to be arranged on the flushing oil tank.

At present, an oil return pipe for an oil tank of a lubricating oil circulation system is a simple tubular object. When the device is installed, one end of the tubular object is inserted into the flushing oil tank, and the outer wall of the tubular object is in sealed fit with the flushing oil tank. When the circulating system works, return oil firstly enters the tubular object from the outer end of the tubular object and then enters the flushing oil tank from the inner end of the tubular object. When the oil return pipe is used, return oil entering the flushing oil tank from the inner end of the oil return pipe is directly mixed with lubricating oil in the flushing oil tank, so that the impact on the oil in the flushing oil tank is large, and the lubricating oil is severely fluctuated. The oil in the flushing oil tank enters a pipeline of a lubricating oil circulating system, so that bubbles in the pipeline are increased, and the system vibrates and makes abnormal sound. Meanwhile, the impact shock of the lubricating oil in the return oil tank and the flushing oil tank can generate a large amount of bubbles, and the bubbles enlarge the contact area of the lubricating oil and air, so that the oxidation speed of the lubricating oil is accelerated, and the lubricating oil is easy to oxidize and deteriorate.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to disclose an utensil liquid buffer gear's flushing tank for solve the above-mentioned problem that the flushing tank among the prior art exists, reduce to carry the impact and the vibration that the lubricating oil of backward flow caused to the lubricating oil of the inside holding of flushing tank in the flushing tank.

In order to achieve the above object, the utility model provides a utensil liquid buffer gear's flushing oil tank, include:

the lubricating oil tank comprises an oil tank shell with a hollow cavity, a liquid buffer mechanism movably embedded at the top of the oil tank shell, a first partition plate and a second partition plate, wherein the first partition plate and the second partition plate are transversely arranged in the oil tank shell;

the liquid buffer mechanism includes: the oil return pipe comprises a first oil return pipe, a cover plate formed at the bottom of the first oil return pipe, a support vertically and downwards arranged from the cover plate, two side plates clamped by the support and arranged in parallel, and a plurality of guide plates clamped by the two side plates, wherein the guide plates and the side plates form falling holes alternately arranged in the vertical direction.

As a further improvement of the utility model, by a plurality of guide boards of curb plate centre gripping are the slope setting, and two adjacent guide boards along the vertical direction lean on each other, are close to first time oil pipe's the whereabouts hole that the guide board formed and deviate in first time oil pipe, the guide board forms and is close to along the whereabouts hole of vertical direction alternative arrangement the curb plate, the guide board forms the portion of bending that upwards sets up, the whereabouts hole is the rectangle.

As a further improvement of the present invention, the liquid buffer mechanism further includes: the observation hole is arranged on the cover plate; the cover plate is rectangular, the cover plate is vertically provided with four supports downwards, and the four supports are arranged in a rectangular mode in the overlooking angle.

As a further improvement of the present invention, the flushing oil tank further comprises: and the second oil return pipes vertically extend into the second accommodating cavity, and are positioned inside the oil tank shell and sleeved with a buffer pipe.

As a further improvement of the utility model, first baffle forms the first through-hole that supplies the horizontal lateral flow of lubricating oil, the second baffle forms the second through-hole that supplies the horizontal lateral flow of lubricating oil, the top of first baffle forms first balanced drain, the top of second baffle forms the balanced drain of second, first balanced drain and the balanced drain staggered arrangement of second.

As a further improvement of the present invention, the buffer tube includes: the oil storage device comprises a hollow cylinder wall, wherein a bottom plate is arranged at the bottom of the hollow cylinder wall, a circle of arch-shaped oil outlet holes which are annularly arranged are formed in the side portion of the bottom end of the hollow cylinder wall, a circle of air vent holes are formed in the side portion of the top end of the hollow cylinder wall, at least one group of oil storage plates are arranged in the hollow cylinder wall, an upper guide plate and a lower guide plate are arranged on the oil storage plates in a superposition mode of an upper portion and a lower portion, and an arc-shaped gap for lubricating oil to transversely flow is formed between the upper guide plate and the lower guide plate.

As the utility model discloses a further improvement, the guide plate forms the free end of kickup down, and lubricating oil holds certain lubricating oil all the time at cavity section of thick bamboo wall whereabouts in-process down, the free end of going up the guide plate floods all the time in the lubricating oil that the guide plate held down.

As a further improvement, the first baffle forms the stop part of being connected with the oil tank shell, first through-hole and oil tank shell alternate segregation, the second through-hole contacts with the oil tank shell, first through-hole and second through-hole dislocation arrangement.

As a further improvement, the top of the oil tank shell is provided with an oil mist suction hole communicated with the third accommodating cavity.

As a further improvement of the present invention, the flushing oil tank further comprises: and the lubricating oil output holes are arranged at the bottom of the oil tank shell and communicated with the third accommodating cavity.

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

in the utility model, the falling holes which are alternately arranged along the vertical direction are formed by the plurality of guide plates contained in the liquid buffer mechanism, so that the lubricating oil can play a role of buffering by the guide plates in the process of falling to the flushing oil tank and enter the oil tank shell along the falling holes which are alternately arranged along the vertical direction, thereby reducing the impact and vibration on the lubricating oil contained in the flushing oil tank when the returned lubricating oil is conveyed; simultaneously, because the second returns oil pipe to be located the inside cover of oil tank shell and establishes the buffer tube, further reduced lubricating oil through the second return oil pipe fall back to the oil tank shell in the impact that the lubricating oil of holding led to the fact in the oil tank shell.

Drawings

FIG. 1 is a front view of a flushing oil tank with a liquid buffer mechanism of the present invention;

FIG. 2 is a left side view of a flush tank with a fluid cushioning mechanism as shown in FIG. 1;

FIG. 3 is a perspective view of the flushing tank with a liquid buffer mechanism shown in FIG. 1, with the top plate and the side plates omitted;

FIG. 4 is a perspective view of a liquid damper mechanism;

FIG. 5 is a front view of the liquid damper mechanism;

FIG. 6 is a top view of the first and second partitions mounted in the tank shell;

FIG. 7 is a front view of a buffer tube sleeved inside the tank shell with a second oil return tube;

FIG. 8 is a sectional view taken along A-A in FIG. 7, and FIG. 7 is a schematic view showing the lubricating oil accommodated on the plurality of reservoir plates;

fig. 9 is a sectional view taken along a-a in fig. 7, and a schematic view illustrating the lubricant oil contained in the reservoir plate in fig. 7 is omitted.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

Fig. 1 to 9 show an embodiment of a flush tank with a liquid buffer mechanism according to the present invention. In the present embodiment, a flush oil tank (hereinafter referred to as "flush oil tank") having a liquid damper mechanism is applied to a lubrication station.

As shown in fig. 1 to 3, the flush oil tank with a liquid buffer mechanism includes: the lubricating oil tank comprises an oil tank shell 10 with a hollow cavity, lubricating oil contained in the oil tank shell 10, a liquid buffer mechanism 20 movably embedded at the top of the oil tank shell, and a first partition plate 15 and a second partition plate 16 which are transversely arranged in the oil tank shell 10, wherein the first partition plate 15 forms a first through hole 151 for the horizontal transverse flow of the lubricating oil, and the second partition plate 16 forms a second through hole 161 for the horizontal transverse flow of the lubricating oil. The oil tank shell 10 is enclosed by four side plates, a bottom plate and a top plate. The second oil return pipe 11 is located inside the oil tank shell 10 and is sleeved with a buffer pipe 50. The buffer tube 50 is vertically disposed and extends above the bottom of the tank housing 10 and is suspended above the floor of the tank housing 10. A rectangular through hole (not shown) is formed in the top plate of the tank case 10 to receive the liquid damper 20 therethrough, the liquid damper 20 is vertically inserted into the rectangular through hole, and the cover plate 21 is fixed to the top plate of the tank case 10 by a ring of bolts. In this embodiment, the liquid damper mechanism 20 is modular in design, facilitating removable installation and replacement. The first partition 15 and the second partition 16 are arranged in parallel and are welded and fixed with the tank shell 10, and the structure can also improve the whole structural strength of the tank shell 10 to a certain extent.

Referring to fig. 4 to 5, in the present embodiment, the liquid damper mechanism 20 includes: the first oil return pipe 22, the cover plate 21 formed at the bottom of the first oil return pipe 22, the bracket 29 vertically downward disposed from the cover plate 21, two side plates (i.e., the side plate 26 and the side plate 27) clamped by the bracket 29 and arranged in parallel, and a plurality of guide plates clamped by the two side plates, the guide plates and the side plates forming falling holes alternately arranged in the vertical direction. The guide plates clamped by the side plates are obliquely arranged and are abutted against each other along two adjacent guide plates in the vertical direction. Specifically, the side plates 26 and 27 are disposed parallel and perpendicular to each other, and the guide plates 24 and 25 disposed obliquely are sandwiched between the side plates 26 and 27. The bottom of the guide plate 24 abuts against the top of the guide plate 25, the guide plate 24 and the side plate 26 form a rectangular drop hole 242, and the guide plate 25 and the side plate 27 form a rectangular drop hole 252.

Specifically, in the present embodiment, the cover plate 21 is rectangular, and four brackets 29 are vertically disposed downward from the cover plate 21, and the four brackets 29 are rectangular in a top view. The drop hole formed by the guide plate adjacent to the first oil return pipe 22 is offset from the first oil return pipe 22. The guide plates form dropping holes alternately arranged in a vertical direction near the side plates. The guide plate 24 is provided with a bent portion 241 provided upward, and the guide plate 25 is provided with a bent portion 251 provided upward. The liquid damper mechanism 20 further includes: a viewing aperture 23 provided in the cover plate 21. The observation holes 23 can be used to observe the real-time situation of the flow of the lubricating oil on the guide plate 24. The guide plates 24 and 25 form an included angle of 20-30 degrees with the horizontal plane. The drop hole 242,252 is rectangular. The brackets 29 are made of angle steel, the side plates 26 and 27 are welded and fixed between the two brackets 29, and the brackets 29 are welded and fixed to the cover plate 21.

The bending portion 241 and the bending portion 251 are used for collecting the falling lubricating oil, the lubricating oil is firstly blocked and buffered by the guide plate 24 after falling from the first oil return pipe 22, the lubricating oil flows downwards along the guide plate 24 and falls downwards to the guide plate 25 from the falling hole 242, the lubricating oil returns downwards along the guide plate 25 and flows downwards, and finally falls into the first accommodating cavity 200 from the falling hole 252. Meanwhile, in order to facilitate the integral pulling of the liquid damper mechanism 20, two pull handles 210 may be provided on the cover plate 21.

As shown in connection with fig. 7-9, in the present embodiment, the buffer tube 50 includes: the lubricating oil storage device comprises a hollow cylinder wall 110, wherein a bottom plate 112 is arranged at the bottom of the hollow cylinder wall 110, a circle of annularly-arranged arch-shaped oil outlet holes 113 is formed in the side portion of the bottom end of the hollow cylinder wall 110, a circle of air outlet holes 111 is formed in the side portion of the top end of the hollow cylinder wall 110, at least one group of oil storage plates are arranged in the hollow cylinder wall 110, an upper guide plate 114 and a lower guide plate 115 are arranged on the oil storage plates in a superposed mode from the upper portion to the lower portion, and an arc-shaped gap 116 for lubricating oil to flow transversely is formed between the upper guide plate 114 and the lower guide plate 115. The bottom plate 112 plays a certain role in buffering and blocking the lubricating oil which falls vertically, and the lubricating oil flows out from a circle of annular arch-shaped oil outlet holes 113.

In the present embodiment, a circle of air release holes 111 is formed at the top of the hollow cylinder wall 110, so that the lubricant oil with a relatively high viscosity can smoothly drop downward, and oil mist volatilized from the lubricant oil with a relatively high temperature can be discharged out of the hollow cylinder wall 110 through the circle of air release holes 111, and collected below the top plate of the oil tank housing 10, and finally sucked away through the oil mist suction holes 35 and changed into liquid lubricant oil again by using an oil mist separator (not shown), and then falls into the third accommodating cavity 400 again.

Referring to fig. 9, the lower baffle 115 forms a free end 1151 bent upward, and when the lubricant falls down on the hollow cylinder wall 110, the lower baffle 115 always holds a certain amount of lubricant (see the black area 117 in fig. 8), and the free end 1141 of the upper baffle 114 is always submerged in the lubricant held by the lower baffle 115. The height of the free end 1151 in the vertical direction is higher than the height of the free end 1141 in the vertical direction. The top of the hollow cylinder wall 110 has an opening 1119 for connecting the second oil return pipe 11 through the opening 1119. The opening 1119 communicates with the second oil return pipe 11. Meanwhile, the diameter of the hollow cylinder wall 110 is adapted to the diameter of the second oil return pipe 11. In this embodiment, three sets of oil storage plates are disposed inside the hollow cylinder wall 110, so that the lubricating oil falling into the first accommodating cavity 200 is buffered, and the impact of the lubricating oil falling back into the oil tank shell 10 on the lubricating oil accommodated in the oil tank shell is further reduced.

Referring to FIG. 3, in this embodiment, the top of the first baffle 15 forms a first equalizing vent 152, the top of the second baffle 16 forms a second equalizing vent 162, and the first equalizing vent 152 is offset from the second equalizing vent 162. The first and second equalizing vents 152, 162 are rectangular in shape, and the first and second equalizing vents 152, 162 are flat. The oil tank housing 10 is rectangular, and the first accommodating cavity 200, the second accommodating cavity 300, and the third accommodating cavity 400 together form a hollow cavity, and lubricant is accommodated in the hollow cavity formed by the oil tank housing 10.

Referring to fig. 6, in the present embodiment, the first balance vent 152 and the second balance vent 162 are arranged in a staggered manner, which means that the first balance vent 152 and the second balance vent 162 are respectively located on two sides of the central axis 100 of the tank case 10. Meanwhile, the first through hole 151 and the second through hole 161 are arranged in a staggered manner, that is, the first through hole 151 and the second through hole 161 are respectively located on two sides of the central axis 100 of the fuel tank shell 10.

Referring to fig. 1 and 3 to 6, in the present embodiment, the oil tank shell 10 is equally divided into three equal parts by the first partition 15 and the second partition 16, and the first receiving cavity 200, the second receiving cavity 300, and the third receiving cavity 400 are communicated with each other and used for receiving lubricating oil. This flushing oil tank still includes: and a plurality of second oil return pipes 11 vertically extending into the second accommodating cavity 300. The first partition 15 forms a blocking portion 153 connected to the tank case 10, the first through hole 151 is separated from the tank case 10, and the second through hole 161 is in contact with the tank case 10; and a plurality of second oil return pipes 11 vertically extending into the second accommodating chamber 300. The oil mist suction hole 35 communicating with the third accommodation chamber 400 is provided at the top of the oil tank case 10.

The mist suction hole 35 may be connected to a mist separator (not shown), and the mist separator may convert the mist-like lubricant oil into liquid lubricant oil again, and the liquid lubricant oil falls into the third accommodating cavity 400 again to prevent the mist from damaging the environment. The lubricating oil which flows back into the oil tank shell 10 from the liquid buffer mechanism 20 and the four second return pipes 11 can play an effective buffering role through the first partition plate 15 and the second partition plate 16, and the lubricating oil flows around inside the oil tank shell 10 along the flow paths shown by the arrows a and B in fig. 1 and 3, so that the impact and vibration on the flushing oil tank caused by the flowing of the lubricating oil in the flushing oil tank are effectively avoided, the phenomenon that the lubricating oil is mixed with bubbles in the flowing process of the lubricating oil in the flushing oil tank is avoided, the contact area of the lubricating oil and air is reduced, the oxidation speed of the lubricating oil is delayed, and the service life of the lubricating oil is prolonged.

Meanwhile, the flushing oil tank shown in this embodiment further includes a plurality of lubricant output holes disposed at the bottom of the oil tank shell 10 and communicated with the third accommodating cavity 400. Specifically, referring to fig. 2, in the present embodiment, a lubricant output hole 31 and a lubricant output hole 32 are disposed at the bottom of the oil tank shell 10, the lubricant output holes 31 and 32 are connected to a lubricant circulation device (not shown), so that the lubricant is pumped from the lubricant output holes 31 and 32 to a device (for example, a bearing lubrication station of a hydraulic device) that needs to be lubricated by using lubricant, and the lubricant is filtered by using a filtering device and then pumped into the first accommodating cavity 200 through the first oil return pipe 22 of the liquid buffer mechanism 20 again. Since the lubricating oil contained in the oil tank case 10 is usually maintained at 60 degrees centigrade or higher, oil mist is generated inside the oil tank case 10, and therefore, the first balance vent 152 and the second balance vent 162 are opened on the top plate close to the oil tank case 10, so that the oil mist in the first containing cavity 200, the second containing cavity 300 and the third containing cavity 400 formed by the oil tank case 10 can be communicated with each other and attached to the top plate, and collected into the third containing cavity 400 through the first balance vent 152 and the second balance vent 162, and discharged from the oil mist suction hole 35. Referring to fig. 2 and 3, the tank shell 10 is further provided with a port 33 and a port 34 respectively disposed at one side of the third accommodating cavity 400 for connecting a liquid level meter (not shown) and arranged up and down, so as to connect the liquid level meter with the port 34 through the port 33, so as to display the level of the lubricating oil in the tank shell 10.

Referring to fig. 1 and 3, in the present embodiment, the liquid buffer mechanism 20 flows the lubricating oil back into the first receiving cavity 200, and the blocking portion 153 blocks the falling lubricating oil, and the lubricating oil flows from the first through hole 151 into the second receiving cavity 300 along the direction indicated by the arrow a. Then flows into the third receiving cavity 400 in the direction indicated by the arrow B. In this embodiment, since the lubricant output hole 31 and the lubricant output hole 32 are communicated with the third accommodating cavity 400, the lubricant output hole 31 and the lubricant output hole 32 are prevented from directly pumping the lubricant which just falls down, so that the flow of the lubricant in the oil tank shell 10 is smoother, and air is prevented from being mixed into the lubricant.

Referring to fig. 1 to 3, the flushing oil tank shown in this embodiment further includes a plurality of second oil return pipes 11 vertically extending into the second accommodating cavity 300, and specifically, four second oil return pipes 11 are provided. The second return line 11 is used to receive the returning lubricating oil of a relief valve (not shown) and a pressure return system (not shown) provided in the seal oil station. Meanwhile, four second oil return pipes 11 are arranged in a straight line and disposed adjacent to the first partition 15. In the embodiment, four second oil return pipes 11 each extend vertically to the bottom of the tank case 10.

In this embodiment, a manhole 51 communicating with the first receiving chamber 200 is provided at the top of the tank case 10. So that the operator can conveniently enter the tank shell 10 through the manhole 51 to repair the pipes or components arranged in the tank shell 10. Meanwhile, as shown in fig. 1 to 3, the side wall of the tank case 10 is formed with a plurality of reinforcing ribs 101 which are vertically arranged and are inwardly recessed. The structural strength of the tank case 10 is thereby further improved by providing a plurality of reinforcing ribs 101.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. A kind of flushing oil tank with liquid buffer gear, characterized by that, comprising:

the lubricating oil tank comprises an oil tank shell (10) with a hollow cavity, a liquid buffer mechanism (20) movably embedded at the top of the oil tank shell (10), and a first partition plate (15) and a second partition plate (16) which are transversely arranged in the oil tank shell (10), wherein the oil tank shell (10) is equally divided into three first accommodating cavities (200), a second accommodating cavity (300) and a third accommodating cavity (400) by the first partition plate (15) and the second partition plate (16) and are communicated with each other;

the liquid damper mechanism (20) includes: the oil return device comprises a first oil return pipe (22), a cover plate (21) formed at the bottom of the first oil return pipe (22), a support (29) vertically arranged downwards from the cover plate (21), two side plates clamped by the support (29) and arranged in parallel, and a plurality of guide plates clamped by the two side plates, wherein the guide plates and the side plates form falling holes alternately arranged in the vertical direction.

2. The flushing tank of claim 1, characterized in that the guide plates clamped by the side plates are arranged obliquely, two adjacent guide plates in the vertical direction abut against each other, the falling holes formed by the guide plates close to the first oil return pipe (22) deviate from the first oil return pipe (22), the guide plates form falling holes alternately arranged in the vertical direction close to the side plates, the guide plates form bending parts arranged upwards, and the falling holes are rectangular.

3. A flush tank according to claim 1, characterized in that said liquid cushioning mechanism (20) further comprises: an observation hole (23) provided in the cover plate (21); the cover plate (21) is rectangular, four supports (29) are vertically arranged downwards on the cover plate (21), and the four supports (29) are arranged in a rectangular mode in the overlooking angle.

4. A flush tank according to claim 1, further comprising: the second oil return pipes (11) vertically extend into the second accommodating cavity (300), and the buffer pipes are sleeved inside the second oil return pipes (11) located in the oil tank shell (10).

5. A flush tank according to claim 4, characterized in that said first partition (15) forms a first through hole (151) for the horizontal transverse flow of lubricating oil, said second partition (16) forms a second through hole (161) for the horizontal transverse flow of lubricating oil, the top of said first partition (15) forms a first equilibrium vent (152), the top of said second partition (16) forms a second equilibrium vent (162), said first equilibrium vent (152) being offset from said second equilibrium vent (162).

6. A flush tank according to claim 4, wherein the buffer tube comprises: the oil storage device comprises a hollow cylinder wall (110), wherein a bottom plate (112) is arranged at the bottom of the hollow cylinder wall (110), a circle of annularly-arranged arch-shaped oil outlet holes (113) are formed in the side portion of the bottom end of the hollow cylinder wall (110), a circle of air release holes (111) are formed in the side portion of the top end of the hollow cylinder wall (110), at least one group of oil storage plates are arranged in the hollow cylinder wall (110), an upper guide plate (114) and a lower guide plate (115) are arranged on each oil storage plate in a superposition mode through the upper portion and the lower portion, and an arc-shaped gap (116) for lubricating oil to flow transversely is formed between each upper guide plate (114) and the corresponding lower guide plate (115).

7. The flushing tank of claim 6, characterized in that the lower deflector (115) forms an upwardly curved free end, the lower deflector (115) always holds a certain amount of lubricant during the falling of the hollow cylinder wall (110), and the free end of the upper deflector (114) is always submerged in the lubricant held by the lower deflector (115).

8. A flush tank according to claim 5, characterized in that said first partition (15) forms a stop (153) connected to the tank casing (10), said first through hole (151) being separated from the tank casing (10), said second through hole (161) being in contact with the tank casing (10), said first through hole (151) being offset from the second through hole (161).

9. A flushing tank as claimed in claim 4, characterized in that the top of the tank casing (10) is provided with an oil mist suction aperture (35) communicating with the third receiving cavity (400).

10. A flush tank according to claim 4, further comprising: and the lubricating oil output holes are arranged at the bottom of the oil tank shell (10) and are communicated with the third accommodating cavity (400).

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