阅读说明：本技术 立式液环真空泵 (Vertical liquid ring vacuum pump ) 是由 罗怀德 陈文开 刘少丹 于 2021-11-10 设计创作，主要内容包括：本发明属于真空泵技术领域,具体为一种立式液环真空泵,包括泵体、电机和叶轮,泵体一体成型有位于上部的吸气腔室和排出腔室,以及位于下部的压缩腔室,吸气腔室和排出腔室之间设有轴孔,轴孔相对压缩腔室的中心偏心设置,泵体侧部设有连通吸气腔室的吸气接口、连通排出腔室的排出接口以及进液接口,压缩腔室的内顶壁开设有连通吸气腔室的吸气配流孔、连通排出腔室的排出配流孔以及连通进液接口的进液通道,电机装设在泵体的上侧,其向下伸入轴孔并与轴孔密封配合的驱动轴,叶轮装设在压缩腔室内且与驱动轴传动连接,本发明的集成式泵体结构更简单,装配更便捷,抽气速率更快、负压更稳定,工作噪音更低。(The invention belongs to the technical field of vacuum pumps, in particular to a vertical liquid ring vacuum pump, which comprises a pump body, a motor and an impeller, wherein the pump body is integrally formed with an air suction chamber and a discharge chamber which are positioned at the upper part and a compression chamber which is positioned at the lower part, a shaft hole is arranged between the air suction chamber and the discharge chamber, the shaft hole is eccentrically arranged relative to the center of the compression chamber, the side part of the pump body is provided with an air suction interface communicated with the air suction chamber, a discharge interface communicated with the discharge chamber and a liquid inlet interface, the inner top wall of the compression chamber is provided with an air suction flow distribution hole communicated with the air suction chamber, a discharge flow distribution hole communicated with the discharge chamber and a liquid inlet channel communicated with the liquid inlet interface, the motor is arranged at the upper side of the pump body, the motor extends downwards into the shaft hole and is in sealing fit with the shaft hole, and the impeller is arranged in the compression chamber and is in transmission connection with the driving shaft, the air suction speed is faster, the negative pressure is more stable, and the working noise is lower.)

1. Vertical liquid ring vacuum pump, its characterized in that includes:

the pump body is integrally formed with an air suction cavity and a discharge cavity which are positioned on the upper part, and a compression cavity which is positioned on the lower part, wherein an axle hole which downwards penetrates through the inner top wall of the compression cavity is arranged between the air suction cavity and the discharge cavity, the axle hole is eccentrically arranged relative to the center of the compression cavity, the side part of the pump body is provided with an air suction interface communicated with the air suction cavity, a discharge interface communicated with the discharge cavity and a liquid inlet interface, and the inner top wall of the compression cavity is provided with an air suction flow distribution hole communicated with the air suction cavity, a discharge flow distribution hole communicated with the discharge cavity and a liquid inlet channel communicated with the liquid inlet interface;

the motor is arranged on the upper side of the pump body and is provided with a driving shaft which extends downwards into the shaft hole and is in sealing fit with the shaft hole;

and the impeller is arranged in the compression chamber and is in transmission connection with the driving shaft.

2. The vertical liquid ring vacuum pump according to claim 1, wherein the pump body comprises an upper casing and a lower casing which are integrated, the upper casing is open at the upper side, a mounting seat is arranged in the middle of an inner cavity of the upper casing, the mounting seat divides the inner cavity of the upper casing into the air suction chamber and the discharge chamber, a cover plate is arranged on the upper sealing cover of the air suction chamber and the discharge chamber, the shaft hole is arranged on the mounting seat, the lower casing and the upper casing are eccentrically arranged, the lower opening of the lower casing forms the compression chamber, and a bottom plate is arranged on the lower sealing cover of the compression chamber.

3. The vertical liquid ring vacuum pump as claimed in claim 2, wherein the cover plate and/or the bottom plate is sealed with the pump body by a sealant.

4. The vertical liquid ring vacuum pump according to claim 2, further comprising a tray mounted on the upper side of the cover plate, wherein the tray is provided with a through hole corresponding to the shaft hole, the motor is connected to the upper side of the tray, and a driving shaft of the motor penetrates through the through hole and extends into the shaft hole.

5. The vertical liquid ring vacuum pump according to claim 4, wherein a convex edge is arranged between the inner side wall of the pump body and the suction chamber and between the inner side wall of the pump body and the discharge chamber, the cover plate is supported on the upper side of the convex edge, and the tray is sequentially connected with the cover plate and the convex edge through screws.

6. The vertical liquid ring vacuum pump according to any one of claims 1 to 5, wherein the discharge port comprises a normally open hole and at least one openable or closable proportioning hole.

7. The vertical liquid ring vacuum pump according to claim 6, wherein the proportioning hole is provided with a sealing member for controlling opening and closing thereof.

8. The vertical liquid ring vacuum pump according to claim 6, wherein the projections of the suction orifice and the discharge orifice on the horizontal plane are arc-shaped structures, the aperture of the suction orifice is gradually enlarged in the direction of rotation of the impeller, and the aperture of the discharge orifice is gradually narrowed in the direction of rotation of the impeller.

9. The vertical liquid ring vacuum pump according to claim 8, wherein the proportioning hole is provided at an end where the aperture of the discharge orifice is narrowed, and the normal opening is provided at an end where the aperture of the discharge orifice is enlarged.

10. The vertical liquid ring vacuum pump according to any one of claims 1 to 5, wherein a mechanical seal is provided between the shaft hole and the driving shaft.

Technical Field

The invention belongs to the technical field of vacuum pumps, and particularly relates to a vertical liquid ring vacuum pump.

Background

A liquid ring vacuum pump is a vacuum pumping device with the advantages of simple structure, uniform air suction, stable and reliable work and the like, and is widely applied to various industries such as medical treatment, chemical engineering, electric power and the like, the existing liquid ring vacuum pump comprises a motor, a mounting seat, an impeller, a cover plate and a pump cover, an air suction cavity and a discharge cavity which are mutually independent are arranged in the pump cover, the side part of the pump cover is respectively provided with an air suction interface communicated with the air suction cavity and a discharge interface communicated with the discharge cavity, the bottom of the pump cover is provided with a liquid inlet channel communicated with the air suction cavity and the steam discharge cavity, the cover plate is sealed and covered on the upper sides of the air suction cavity and the discharge cavity of the pump cover and is provided with an air suction flow distribution hole communicated with the air suction cavity, a discharge flow distribution hole communicated with the discharge cavity and a liquid inlet communicated with the liquid inlet channel, the mounting seat is covered on the cover plate in a mode without opening at the lower side and forms a compression cavity used for assembling the impeller with the cover plate, the motor is installed at the mount pad upside, its drive shaft stretches into in the compression chamber and is connected with the impeller transmission, the during operation impeller rotates adsorbed gas and makes gas in proper order via the interface of breathing in, the suction chamber with breathe in the flow distribution hole and get into the compression chamber, liquid pours into the compression chamber into from inlet channel into simultaneously, along with the rotation of impeller, be located the interior liquid of compression chamber and gas through discharge flow distribution hole discharge realization evacuation, the vacuum pump structure of this kind of structure is complicated now, be unfavorable for assembly production.

Disclosure of Invention

The invention aims to overcome the defects of complex structure and more parts of the existing vacuum pump, and provides a vacuum pump adopting an integrated pump body, so that the structure of the pump body is simplified, and the assembly and the production are convenient.

In order to solve the technical problems, the invention adopts the following technical scheme:

a vertical liquid ring vacuum pump comprises a pump body, a motor and an impeller, wherein the pump body is integrally formed with an air suction chamber and a discharge chamber which are positioned at the upper part, and a compression chamber at the lower part, a shaft hole which downwards penetrates through the inner top wall of the compression chamber is arranged between the air suction chamber and the discharge chamber, the shaft hole is eccentrically arranged relative to the center of the compression chamber, the side part of the pump body is provided with an air suction interface communicated with the air suction chamber, a discharge interface communicated with the discharge chamber and a liquid inlet interface, the inner top wall of the compression chamber is provided with an air suction flow distribution hole communicated with the air suction chamber, a discharge flow distribution hole communicated with the discharge chamber and a liquid inlet channel communicated with the liquid inlet interface, the motor is arranged on the upper side of the pump body, it stretches into downwards the shaft hole and with the sealed complex drive shaft in shaft hole, the impeller install in the compression chamber and with the drive shaft transmission is connected.

Compared with the prior art, the vertical liquid ring vacuum pump provided by the invention is characterized in that when the vertical liquid ring vacuum pump works, a driving shaft of a motor is arranged on a working platform in a downward mode, liquid is injected into a compression cavity, the motor drives an impeller to rotate to form a liquid ring so as to suck air, so that the air flows into the compression cavity from an air suction port sequentially through an air suction cavity and an air suction distributing hole, the air in the compression cavity is compressed along with the further rotation of the impeller, and the liquid is discharged from a discharge port sequentially through a discharge distributing hole and a discharge cavity to realize vacuum pumping. And adopt single-phase 220V's motor, convenient to use and installation are more laborsaving, and noise at work is lower.

Further, the pump body includes integrative epitheca and inferior valve, the epitheca upside is uncovered, and its inner chamber middle part is equipped with the mount pad, the mount pad will the epitheca inner chamber is separated into inhale the cavity with the discharge chamber, inhale the cavity with the sealed lid of the upside of discharge chamber is equipped with the apron, the shaft hole sets up on the mount pad, the inferior valve with epitheca eccentric settings, the uncovered formation of its downside the compression chamber, the sealed lid of the downside of compression chamber is equipped with the bottom plate, and above-mentioned pump body adopts integrative structure, through setting up the mount pad in the epitheca to form and inhale cavity and discharge chamber to through setting up the shaft hole at the middle part of mount pad, thereby make the structure simple compact more, and the components of a whole that can function independently structure that sets up apron and bottom plate can be convenient for maintain above-mentioned three cavity.

Further, the discharge distribution hole comprises a normal opening hole and at least one openable or closable proportioning hole, the number of the openings of the proportioning hole is determined according to the compression ratio, preferably, the proportioning hole is provided with a sealing element for controlling the opening and closing of the proportioning hole, and the discharge distribution hole is arranged in a mode that a user can adjust the compression ratio according to actual conditions.

Furthermore, the projection of the air suction distribution hole and the projection of the discharge distribution hole on the horizontal plane are of arc structures, the aperture of the air suction distribution hole is gradually enlarged along the rotating direction of the impeller, the aperture of the discharge distribution hole is gradually narrowed along the rotating direction of the impeller, and the shapes of the air suction distribution hole and the discharge distribution hole can improve the air suction and compression capacity of the vacuum pump. Preferably, the proportioning hole is formed in one end of the narrowed aperture of the discharge orifice, the normally-opened hole is formed in one end of the enlarged aperture of the discharge orifice, and fine adjustment of the compression ratio can be facilitated by the arrangement mode.

Furthermore, the cover plate and/or the bottom plate and the pump body are sealed through sealing glue.

Further, the shaft hole and the driving shaft are sealed mechanically.

Further, still including installing the tray of apron upside, the tray corresponds the shaft hole is equipped with the via hole, the motor connect in the upside of tray, its drive shaft passes the via hole stretches into the shaft hole.

Furthermore, convex edges are arranged between the inner side wall of the pump body and the air suction chamber and between the inner side wall of the pump body and the discharge chamber, the cover plate is supported on the upper side of the convex edges, and the tray is sequentially connected with the cover plate and the convex edges through screws.

Drawings

FIG. 1 is a perspective view of a vertical liquid ring vacuum pump;

FIG. 2 is an exploded view of a vertical liquid ring vacuum pump;

FIG. 3 is a cross-sectional view of a vertical liquid ring vacuum pump;

FIG. 4 is a cross-sectional view of a vertical liquid ring vacuum pump;

FIG. 5 is a perspective view of the pump body;

fig. 6 is a bottom view of the pump body.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings. In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Referring to fig. 1 to 6, the embodiment provides a vertical liquid ring vacuum pump, which includes a pump body 1, a cover plate 2, a bottom plate 3, a tray 4, an impeller 5 and a motor 6, wherein the pump body 1 includes an integrated upper casing 11 and a lower casing 12, in a specific arrangement, the upper casing 11 and the lower casing 12 may be integrally formed by casting, the upper casing 11 is open at the upper side, the cover plate 2 covers the upper side of the upper casing 11 to seal the opening of the upper casing 11, a mounting seat 13 is disposed in the middle of the inner cavity of the upper casing 11, the mounting seat 13 includes a seat body 131 located in the middle and a connecting wall 132 connecting the seat body 131 and the upper casing 11 at opposite sides, the mounting seat 13 divides the inner cavity of the upper casing 11 into two transversely arranged chambers, which respectively constitute a suction chamber 101 and a discharge chamber 102, the lower side of the lower casing 12 is open to form a compression chamber 103, the bottom plate 3 is disposed at the lower side of the compression chamber 103, the lower shell 12 is eccentrically arranged with respect to the upper shell 11, and the mounting seat 13 is provided with a shaft hole 17 penetrating downward through the inner top wall of the compression chamber 103 and penetrating upward through the cover plate 2.

Referring to fig. 2 to 5, the side of the pump body 1 is respectively provided with an air suction port 111 communicating with the air suction chamber 101, a discharge port 112 communicating with the discharge chamber 102, and a liquid inlet port 113, and the inner top wall of the compression chamber 103 is provided with an air suction flow distribution hole 14 communicating with the air suction chamber 101, a discharge flow distribution hole 15 communicating with the discharge chamber 102, and a liquid inlet channel 16 communicating with the liquid inlet port 113, as shown in fig. 4, in a modified embodiment, a liquid inlet 161 communicating with the liquid inlet channel 16 is provided on the side wall of the shaft hole 17, so as to improve the liquid inlet efficiency, the liquid can simultaneously flow into the compression chamber 103 from the shaft hole 17 by providing the liquid inlet 161.

Referring to fig. 2 to 6, the impeller 5 is rotatably installed in the compression chamber 103, the tray 4 is installed on the upper side of the cover plate 2, the tray 4 is provided with a through hole 41 corresponding to the shaft hole 17, the motor 6 is connected to the upper side of the tray 4, and the driving shaft 61 thereof downwardly passes through the through hole 41 and is in transmission connection with the impeller 5 through the shaft hole 17.

Referring to fig. 3 to 6, the shaft hole 17 is eccentrically arranged with respect to the center of the compression chamber 103, as shown in fig. 6, the space between the impeller 5 and the inner wall of the compression chamber 103 forms crescent-shaped regions (104a,104b), the crescent-shaped regions (104a,104b) include narrowed sections 104a at both ends and an enlarged section 104b between the narrowed sections 104a at both ends, the suction distribution hole 14 and the discharge distribution hole 15 are respectively located in the regions immediately above the impeller 5 and near the narrowed sections 104a, and when the vacuum pump is operated, the vacuum pump is placed on the working platform with the motor facing upward and the bottom plate facing downward, as shown by the arrows in fig. 6, the motor 6 drives the impeller 5 to rotate in the direction from the suction distribution hole 14 to the enlarged sections 104b, so that crescent-shaped liquid rings corresponding to the crescent-shaped regions (104a,104b) are formed on the periphery of the impeller 5, and the half of the liquid ring located on the side near the suction distribution hole 14 gradually increases in the rotation direction of the impeller 5, as the rotation of the impeller 5 realizes air suction, the gas is sucked into the compression chamber 103 from the air suction interface 111 through the air suction chamber 101 through the air suction distributing hole 14 and flows into the blades 51 of the impeller 5, the half of the liquid ring on the side close to the discharge distributing hole 15 is gradually narrowed along the rotation direction of the impeller 5 so as to compress the gas between the blades, the compression process is realized, and the compressed gas and liquid flow into the discharge chamber 102 from the discharge distributing hole 15 and are discharged through the discharge interface 112 in further rotation of the impeller 5, so that the vacuum pumping is realized.

Referring to fig. 5, the projections of the suction chamber 101 and the discharge chamber 102 on the horizontal plane are arc-shaped structures, and in a specific arrangement, the volume ratio of the suction chamber 101 to the discharge chamber 102 is 3: 2.

Referring to fig. 6, the discharge orifice 15 includes a constant orifice 151 and at least one proportioning orifice 152 that can be opened or closed, and the proportioning orifice 152 can be opened in a certain amount according to the desired compression ratio, so that the user can adjust the compression ratio according to the actual situation. In a preferred embodiment, the proportioning hole 152 is provided with a sealing member for controlling the opening and closing thereof, such as a screw screwed into the proportioning hole 152.

Referring to fig. 6, the projections of the suction orifice 14 and the discharge orifice 15 on the horizontal plane are arc-shaped, wherein, in order to improve the suction effect, the suction orifice 14 and the discharge orifice 15 are arranged in a crescent arc-shaped structure, that is, the aperture of the suction orifice 14 is gradually enlarged in the direction of rotation of the impeller 5, and the aperture of the discharge orifice 15 is gradually narrowed in the direction of rotation of the impeller 5 in order to improve the compression effect. In a specific embodiment, the proportioning hole 152 is provided at the end where the diameter of the discharge orifice 15 is narrowed, and the normally open hole 151 is provided at the end where the diameter of the discharge orifice 15 is widened, which makes it easier to finely adjust the compression ratio relative to the arrangement of the proportioning hole 152 at the end where the diameter of the discharge orifice 15 is widened, so as to prevent the compression ratio from being greatly changed every time one proportioning hole 152 is closed or opened. In a preferred embodiment, the normally open hole 151 is an elongated hole, the proportioning hole 152 is a circular hole, and the circular hole is easily configured with the above-mentioned sealing member, so that the switching of the on/off state of the proportioning hole 152 is easier.

Referring to fig. 2 to 4, the cover plate 2, the bottom plate 3 and the pump body 1 are sealed by a sealant, which may be a sealing material such as epoxy resin.

Referring to fig. 3 and 4, the shaft hole 17 and the driving shaft 61 are sealed by a mechanical seal, and the sealing effect is good.

Referring to fig. 2 to 5, convex edges 114 extending inwards are arranged between the inner side wall of the upper shell 11 and the air suction chamber 101 and between the inner side wall of the upper shell and the exhaust chamber, the cover plate 2 is supported on the upper side of the convex edges 114, and the tray 4 is sequentially connected with the cover plate 2 and the convex edges 114 through screws.

Compared with the prior art, when the vertical liquid ring vacuum pump provided by the invention works, liquid is injected into the compression chamber 103, the motor 6 drives the impeller 5 to rotate to form a liquid ring so as to suck air, so that air flows into the compression chamber 103 from the air suction interface 111 through the air suction chamber 101 and the air suction distributing hole 14 in sequence, and along with the further rotation of the impeller 5, the air in the compression chamber 103 is compressed, and the liquid is discharged from the discharge interface 112 through the discharge distributing hole 15 and the discharge chamber 102 in sequence to realize vacuum pumping, the invention adopts the integrated pump body 1, the air suction chamber 101, the discharge chamber 102 and the compression chamber 103 are integrated into the pump body 1, so that the structure of the vacuum pump is simpler, the assembly is more convenient, the flow track of fluid is changed, the air suction rate is higher, the negative pressure is more stable, the movement and the operation are more stable, in addition, because the vacuum pump provided by the invention adopts the vertical motor 6, and adopt single-phase 220V's motor 6, convenient to use and installation are more laborsaving, and noise at work is lower.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.