CN111156207A

CN111156207A - Oil diffusion pump with low oil return rate

Info

Publication number: CN111156207A
Application number: CN202010034541.1A
Authority: CN
Inventors: 陈国兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-05-15

Abstract

The invention relates to the field of vacuum pump equipment, and discloses an oil diffusion pump with low oil return rate, which comprises a pump body, wherein a heating assembly is arranged at the bottom of an inner cavity of the pump body, an oil guide disc is arranged at the top of the heating assembly, a pump core is arranged in the middle of the top end of the oil guide disc, an annular pump ring sleeve is arranged on the outer edge of the top of the oil guide disc, the heights of the pump ring sleeve and the pump core are the same, the inner diameters of the pump core and the pump ring sleeve are uniformly reduced from bottom to top, a cooling ring positioned between the pump core and the pump ring sleeve is arranged inside the pump body, the top of the inner cavity of the cooling ring is communicated with a flow inlet pipe, and the bottom of the side surface of the cooling. This oil diffusion pump that oil rate is low returns is through leading the outer edge at oil pan top add the pump ring cover of being equal in height with the pump core to place the cooling ring between pump core and pump ring cover, make oil steam all be in the longest state by the distance of cooling ring effect, thereby ensure oil steam fully cools off, reduced the oil along with the loss rate of air, saved the cost.

Description

Oil diffusion pump with low oil return rate

Technical Field

The invention relates to the field of vacuum pump equipment, in particular to an oil diffusion pump with low oil return rate.

Background

The oil diffusion pump is a vacuum pump which utilizes oil steam jet flow with low pressure, high speed and directional flow to extract air, and is widely applied to the industrial fields of machinery, electronics, metallurgy and the like.

However, the pump core of current oil diffusion pump adopts the multistage injection mode, the steam of pump core inner chamber is followed it respectively and is close to bottom department promptly, middle part and top are erupted downwards, this makes the steam that is close to bottom department discharge from the blast pipe very fast, steam is not fully cooled, most steam is along with air escape, lead to the loss rate of oil to improve, thereby the cost is improved, and current pump core is the toper design, by pump core top spun steam different with the speed of below spun steam, this makes the power of steam downflow have certain loss, thereby the efficiency of bleeding has been influenced, and then the work efficiency of diffusion pump is influenced.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the oil diffusion pump with low oil return rate, which has the advantages of low oil loss rate and high working efficiency and solves the problems provided by the background technology.

The invention provides the following technical scheme: an oil diffusion pump with low oil return rate comprises a pump body, wherein a heating assembly is arranged at the bottom of an inner cavity of the pump body, an oil guide disc is arranged at the top of the heating assembly, a pump core is arranged at the middle of the top end of the oil guide disc, an annular pump ring sleeve is arranged on the outer edge of the top of the oil guide disc, the height of the pump ring sleeve is the same as that of the pump core, the inner diameters of the pump core and the pump ring sleeve are uniformly reduced from bottom to top, a cooling ring positioned between the pump core and the pump ring sleeve is arranged inside the pump body, the top of the inner cavity of the cooling ring is communicated with a flow inlet pipe, the bottom of the side surface of the cooling ring is communicated with a flow outlet pipe, an air outlet pipe is arranged at the bottom of the side surface of the pump body, one end of the air outlet pipe penetrates through the pump ring sleeve, the other end of the air outlet pipe extends to the outside of the pump body, the cooling sleeve is wrapped by, the umbrella-shaped cover is positioned above the pump core, the top of the inner cavity of the pump body is fixedly sleeved with a limiting ring positioned on the pump ring sleeve, and the outer side of the limiting ring and the inner side of the umbrella-shaped cover are both designed into cambered surfaces.

Preferably, the both sides of cooling ring bottom are all fixedly connected with the back shaft, and back shaft and the top fixed connection who leads the oil pan, and the bottom of cooling ring is located the top of outlet duct bottom.

Preferably, the distance value between the umbrella-shaped cover and the pump core is smaller than the inner diameter value of the top of the pump core, and the distance value between the limiting ring and the pump ring sleeve is smaller than the inner diameter value of the top of the cooling ring.

Preferably, the limiting ring is fixed on the pump body through screws on two sides, and the distance value between the inner side of the limiting ring and the side face of the cooling ring is the same as the distance value between the outer side of the umbrella-shaped cover and the side face of the cooling ring.

The invention has the following beneficial effects:

according to the oil diffusion pump with low oil return rate, the pump ring sleeve with the same height as the pump core is additionally arranged on the outer edge of the top of the oil guide disc, and the cooling ring is arranged between the pump core and the pump ring sleeve, so that the distance of oil vapor acted by the cooling ring is in the longest state, the oil vapor is fully cooled, the loss rate of oil along with air is reduced, and the cost is saved; the cooling ring is arranged between the pump core and the pump ring sleeve, so that air flow sprayed by the pump core and the pump ring sleeve can be rapidly cooled by the action of the cooling ring, the cooling rate of oil vapor is increased, and the loss rate of oil along with air is further reduced; and the steam flow at the injection position of the pump core and the pump ring sleeve hardly has mutual interference through the blocking effect of the cooling ring, and continuous and stable down-flow steam is respectively formed, so that the air extraction efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the pump collar of the structure of FIG. 1 in accordance with the present invention;

FIG. 3 is a top view of the pump core of the structure of FIG. 1 in accordance with the present invention;

FIG. 4 is a schematic view of the stop collar of FIG. 1 according to the present invention.

In the figure: 1. a pump body; 2. a heating assembly; 3. an oil guide pan; 4. a pump core; 5. a pump ring sleeve; 6. a cooling ring; 601. an inlet pipe; 602. a discharge pipe; 7. an umbrella-shaped cover; 8. a limiting ring; 9. an air outlet pipe; 901. and (4) cooling the jacket.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, an oil diffusion pump with low oil return rate comprises a pump body 1, a heating assembly 2 is arranged at the bottom of an inner cavity of the pump body 1, an oil guide disc 3 positioned in the inner cavity of the pump body 1 is arranged at the top of the heating assembly 2, the oil guide disc 3 heats oil at the bottom of the inner cavity of the pump body 1 by electrifying the heating assembly 2, so that a pump core 4 is fixedly arranged in the middle of the top end of the oil vapor oil guide disc 3 formed at the bottom of the inner cavity of the pump body 1, an annular pump ring sleeve 5 is fixedly arranged at the outer edge of the top of the oil guide disc 3, the top and the bottom of the pump ring sleeve 5 and the pump core 4 are both in open design, the height values of the pump ring sleeve 5 and the pump core 4 are the same, the calipers of the inner cavities of the pump core 4 and the pump ring sleeve 5 are uniformly reduced from bottom to top, a cooling ring 6 positioned between the pump core 4 and the pump ring sleeve 5 is arranged in the pump body 1, an inlet pipe 601 is, the bottom of the side surface of the pump body 1 is fixedly sleeved with an air outlet pipe 9, one end of the air outlet pipe 9 penetrates through the pump ring sleeve 5, the other end of the air outlet pipe 9 extends to the outside of the pump body 1, the air outlet pipe 9 is wrapped with a cooling sleeve 901, a cavity between the cooling sleeve 901 and the air outlet pipe 9 is communicated with a flow outlet pipe 602, the top of the cooling sleeve 901 is communicated with a drain pipe so that cold area fluid can flow through the cooling ring 6 in a circulating manner, one side of the top of the inner cavity of the cooling ring 6 is fixedly connected with an umbrella-shaped cover 7, the umbrella-shaped cover 7 is positioned above the pump core 4, a limiting ring 8 positioned on the pump ring sleeve 5 is fixedly sleeved at the top of the inner cavity of the pump body 1, the outer side of the limiting ring 8 and the inner side of the umbrella-shaped cover 7 are both designed into a cambered surface, the distance value between the umbrella-shaped cover 7 and the pump core 4 is smaller than the inner diameter value of the top of the pump core 4, the distance value between the, the oil vapor is ejected from the top of the pump core 4 and the pump ring sleeve 5 at a high speed, the oil vapor of the jet flows downwards at a high speed through the blocking refraction of the umbrella-shaped cover 7 and the limiting ring 8 and is discharged through the air outlet pipe 9 at the bottom of the pump body 1, so that a downward moving oil vapor jet is formed in the pump body 1, gas molecules entering from the top of the pump body 1 fall into the oil vapor air flow, the downward moving momentum is obtained to fly downwards, the vacuumizing is realized, the cooling fluid is continuously introduced into the cooling ring 6 through the inflow pipe 601, the oil vapor is cooled into liquid drops and falls into the oil guide disc 3 for cyclic utilization, under the condition that the size diameter of the inner cavity of the pump body 1 is not changed, the equal height design of the pump ring sleeve 5 and the pump core 4 is adopted, the distance of the oil vapor flowing through the cooling ring 6 is improved under the condition that the oil vapor ejection rate is not changed, the cooling ring 6 is effectively utilized for cooling, and the loss rate of, the cost is saved, simultaneously, locate the center department of pump core 4 through pump ring cover 5, cooling ring 6 is located between pump core 4 and the pump ring cover 5, make the oil vapor of department of spraying from pump core 4 and pump ring cover 5 can fully receive the cooling effect of cooling fluid in cooling ring 6, the cooling effect of oil vapor has further been improved, and then effectively reduce the loss rate of oil vapor, and the oil vapor stream in pump core 4 and the pump ring cover 5 is from same high downstream simultaneously, and by the separation effect of cooling ring 6, each other does not influence the interference in batches, further ensured the oil vapor and got into the high-speed downflow of the interior air of pump body 1, thereby the high-efficient evacuation work of diffusion pump has been ensured.

Wherein, the equal fixedly connected with back shaft in both sides of cooling ring 6 bottom, and the top fixed connection of back shaft and oil guide plate 3, the bottom of cooling ring 6 is located the top of 9 bottoms of outlet ducts, when cooling ring 6 is stabilized through oil guide plate 3, does not influence the air that gets into the 1 inner chamber of the pump body and discharges from outlet duct 9.

Wherein, the spacing ring 8 is fixed to the pump body 1 through both sides screw, and the spacing value of 8 inboard and 6 sides of cooling ring of spacing ring is the same with the spacing value of 7 outsides of umbrella type lids and 6 sides of cooling ring, and the radian of umbrella type lid 7 and spacing ring 8 is the same with the radian of current diffusion pump umbrella type nozzle to ensure that oil vapor sprays downwards from the top of pump core 4 and pump ring cover 5.

When the oil pumping device is used, one end of the air outlet pipe 9 is connected with a front-stage mechanical pump, the heating assembly 2 is electrified, the oil guiding disc 3 heats oil at the bottom of the inner cavity of the pump body 1, so that oil steam is generated, the oil steam passes through the pump core 4 and the pump ring sleeve 5 and then is blocked by the umbrella-shaped cover 7 and the limiting ring 8 at the top respectively, the downward-jet oil steam flows downwards at a high speed and is sucked by the front-stage mechanical pump and discharged from the air outlet pipe 9, so that a downward-moving oil steam jet is formed inside the pump body 1, gas molecules entering from the top of the pump body 1 fall into the oil steam airflow, downward-moving momentum is obtained, and the downward-moving momentum is flown downwards, so that the vacuum pumping is realized, and meanwhile, cooling fluid is continuously introduced into the cooling ring 6 through the flow inlet pipe 601, so that the oil steam is cooled into liquid.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an oil diffusion pump that oil return rate is low, includes pump body (1), its characterized in that: the bottom of the inner cavity of the pump body (1) is provided with a heating assembly (2), the top of the heating assembly (2) is provided with an oil guide disc (3), the middle part of the top end of the oil guide disc (3) is provided with a pump core (4), the outer edge of the top of the oil guide disc (3) is provided with an annular pump ring sleeve (5), the pump ring sleeve (5) is as high as the pump core (4), the inner diameters of the pump core (4) and the pump ring sleeve (5) are uniformly reduced from bottom to top, the inside of the pump body (1) is provided with a cooling ring (6) positioned between the pump core (4) and the pump ring sleeve (5), the top of the inner cavity of the cooling ring (6) is communicated with an inlet pipe (601), the bottom of the side surface of the cooling ring (6) is communicated with an outlet pipe (602), the bottom of the side surface of the pump body (1) is provided with an outlet pipe (9), one end of the outlet pipe (9) penetrates through the pump ring (5), and the other end of the, and the cooling jacket (901) wraps the air outlet pipe (9), a cavity between the cooling jacket (901) and the air outlet pipe (9) is communicated with the flow outlet pipe (602), one side of the top of the inner cavity of the cooling ring (6) is fixedly connected with an umbrella-shaped cover (7), the umbrella-shaped cover (7) is positioned above the pump core (4), the top of the inner cavity of the pump body (1) is fixedly sleeved with a limit ring (8) positioned on the pump ring sleeve (5), and the outer side of the limit ring (8) and the inner side of the umbrella-shaped cover (7) are designed into cambered surfaces.

2. The oil diffusion pump with low oil return rate according to claim 1, characterized in that: the equal fixedly connected with back shaft in both sides of cooling ring (6) bottom, and the top fixed connection of back shaft and oil guide dish (3), the bottom of cooling ring (6) is located the top of outlet duct (9) bottom.

3. The oil diffusion pump with low oil return rate according to claim 1, characterized in that: the distance value between the umbrella-shaped cover (7) and the pump core (4) is smaller than the inner diameter value of the top of the pump core (4), and the distance value between the limiting ring (8) and the pump ring sleeve (5) is smaller than the inner diameter value of the top of the cooling ring (6).

4. The oil diffusion pump with low oil return rate according to claim 1, characterized in that: the limiting ring (8) is fixed on the pump body (1) through screws on two sides, and the distance value between the inner side of the limiting ring (8) and the side face of the cooling ring (6) is the same as the distance value between the outer side of the umbrella-shaped cover (7) and the side face of the cooling ring (6).