CN109630433B

CN109630433B - Centrifugal liquid relay supercharging air compressor

Info

Publication number: CN109630433B
Application number: CN201811523397.7A
Authority: CN
Inventors: 孔祥真
Original assignee: Individual
Current assignee: Zhijie Yunfu Dalian Information Technology Co ltd
Priority date: 2018-12-12
Filing date: 2018-12-12
Publication date: 2020-06-30
Anticipated expiration: 2038-12-12
Also published as: CN109630433A

Abstract

The utility model provides a centrifugal liquid relay booster air compressor, includes the casing, and the casing bottom sets up the support, installs the dryer in the casing, and dryer upper portion sets up the air intake, is the cavity in the dryer, and this cavity is inlet air channel, sets up the liquid cavity between dryer outer wall and casing inner wall, and liquid cavity upper portion sets up gaseous cavity to casing top, liquid cavity and gaseous cavity intercommunication. The contribution of the invention lies in that the centrifugal liquid relay supercharging air compressor with a brand new structure is provided, the manufacturing cost of the centrifugal liquid relay supercharging air compressor is about 60% lower than that of the existing similar products, the air outlet pressure range is about 0.01-1.6 Mpa, the operation noise is low, the maintenance amount is small, the parts do not need to be frequently replaced, and the service life is about 50% longer than that of the prior art. The invention also has the advantages that the lubricating oil does not need to be replaced and maintained during the use process of each part, the service life is prolonged by more than 3 times compared with the prior product, the working efficiency can reach about 80 percent, and the like.

Description

Centrifugal liquid relay supercharging air compressor

Technical Field

The invention relates to an air compressor, in particular to a centrifugal liquid relay supercharging air compressor.

Background

High pressure blowers or air compressors are widely used in a variety of industrial fields. The pressure range is about 0.01-0.1 Mpa mainly has roots's fan, multistage axial fan and multistage centrifugal fan etc. and the pressure range can reach about 0.15Mpa has high-speed centrifugal high pressure fan, and the pressure range can reach about 1 Mpa's air compressor has screw air compressor machine and piston air compressor machine etc.. The defects of the product are found in use: large volume, high cost or low efficiency, large energy consumption, high maintenance cost, frequent replacement of lubricating oil and accessories or large noise, environmental pollution and the like.

Object of the Invention

The invention aims to provide a centrifugal liquid relay supercharging air compressor, which is relatively simple in structure and relatively high in efficiency and is realized with low manufacturing cost.

In order to realize the aim of the invention, the invention provides a centrifugal liquid relay booster air compressor, which comprises a shell, wherein the bottom end of the shell is provided with a bracket, an air duct is arranged in the shell, the upper part of the air duct is provided with an air inlet, the air duct is internally provided with a cavity, the cavity is an air inlet channel, a liquid cavity is arranged between the outer wall of the air duct and the inner wall of the shell, a gas cavity is arranged from the upper part of the liquid cavity to the top of the shell, the liquid cavity is communicated with the gas cavity, a sealing plate is arranged at the bottom of the shell, the shell is in sealed connection with the upper end of the outer wall of the air duct, an air outlet is arranged at the upper end of the shell and the upper end of the air cavity, a centrifugal fan impeller is arranged in the shell and is connected with the motor through a connecting piece, the air inlet direction of the centrifugal fan impeller faces the air inlet direction of the air inlet, a liquid inlet pipe is arranged on the shell 1 and the upper part of the liquid cavity, a liquid outlet pipe is arranged on the lower part of the liquid cavity of the shell, and the circle centers of the shell, the air cylinder and the centrifugal fan impeller are positioned on the same vertical axis.

The air duct is a truncated cone or a cylinder, and the large-diameter end of the truncated cone is positioned at the upper end of the shell.

The motor is arranged on the upper part or the lower part of the shell or the air duct.

The centrifugal fan impeller is located outside the bottom end of the air duct, the centrifugal fan impeller is connected with the motor through the transmission shaft, the transmission shaft is located in the air duct and penetrates through the bottom end of the air duct, and the motor is located on the upper portion of the air duct.

The centrifugal fan impeller is positioned at the lower part of the bottom end of the air duct and is connected with the motor through a connecting shaft, and the motor is positioned at the outer end of the bottom of the shell.

The bottom of the shell is provided with a frustum cylinder, the large-diameter end of the frustum cylinder is connected with the inner wall of the shell, the small-diameter end of the frustum cylinder is connected with the sealing plate at the bottom of the shell, and the inner diameter of the small-diameter end of the frustum cylinder is larger than the maximum diameter of the centrifugal fan impeller.

The air duct is characterized in that a circular ring is installed at the bottom end of the air duct, the circular ring is parallel to the front disk of the centrifugal fan impeller and is provided with a gap, reinforcing ribs are arranged on the upper surface of the circular ring, and the reinforcing ribs are radially and uniformly distributed by taking the circle center of the circular ring as the center.

The highest end of the liquid chamber is located in the range of 1/4-4/5 of the height H of the shell.

The centrifugal fan impeller is connected with the motor through a connecting piece, the connecting piece comprises a commutator (26), a transverse input shaft extension shaft and a coupler, the commutator is arranged at the bottom end of the shell and connected with the centrifugal fan impeller, and the commutator is connected with the motor through the transverse input shaft extension shaft and the coupler.

The middle part of the closing plate at the bottom of the shell is connected with the bearing seat in a closing way.

The contribution of the invention lies in that the centrifugal liquid relay supercharging air compressor with a brand new structure is provided, the manufacturing cost of the centrifugal liquid relay supercharging air compressor is about 60% lower than that of the existing similar products, the air outlet pressure range is about 0.01-1.6 Mpa, the operation noise is low, the maintenance amount is small, the parts do not need to be frequently replaced, and the service life is about 50% longer than that of the prior art. The invention also has the advantages that the lubricating oil does not need to be replaced and maintained during the use process of each part, the service life is prolonged by more than 3 times compared with the prior product, the working efficiency can reach about 80 percent, and the like.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention; FIG. 2 is a schematic view of the structure of FIG. 1 from a different perspective; FIG. 3 is a side view schematic; FIG. 4 is a schematic sectional view A-A of FIG. 3; FIG. 5 is a schematic structural diagram of a second embodiment of the present invention; FIG. 6 is a schematic view of the structure of FIG. 5 from a different perspective; FIG. 7 is a schematic side view of the second embodiment; FIG. 8 is a schematic cross-sectional view B-B of FIG. 7; FIG. 9 is a schematic structural diagram of a third embodiment of the present invention; FIG. 10 is a side view schematic of the structure of FIG. 9; FIG. 11 is a schematic cross-sectional view of C-C of FIG. 10; FIG. 12 is a schematic view of an impeller member arrangement in a centrifugal fan impeller for use in the construction of the present invention; FIG. 13 is a schematic bottom view of the axial side structure of FIG. 12; fig. 14 is a schematic view of a second embodiment of the impeller part of the centrifugal fan impeller. Detailed Description

The present invention will be further explained with reference to the accompanying drawings. The invention relates to a centrifugal liquid relay supercharging air compressor, which comprises a shell 1, wherein a support 17 is arranged at the bottom end of the shell 1, an air duct 8 is arranged in the shell 1, an air inlet 6 is arranged at the upper part of the air duct 8, a cavity is arranged in the air duct 8 and is an air inlet channel, a liquid chamber 12 is arranged between the outer wall of the air duct 8 and the inner wall of the shell 1, an air chamber 13 is arranged from the upper part of the liquid chamber 12 to the top of the shell 1, the liquid chamber 12 is communicated with the air chamber 13, a sealing plate 28 is arranged at the bottom of the shell 1, the upper ends of the outer walls of the shell 1 and the air duct 8 are in sealing connection, an air outlet 11 is arranged on the upper end of the shell 1 and the upper end of the air chamber 13, a centrifugal fan impeller 4 is arranged in the shell 1, the centrifugal fan impeller 4 is connected with a motor through a connecting piece, the lower part is provided with a liquid outlet pipe 10, and the centers of the shell 1, the air duct 8 and the centrifugal fan impeller 4 are positioned on the same vertical axis. In the above structure, the liquid chamber 12 contains liquid or liquid-gas mixture state liquid, and the gas chamber 13 contains gas or compressed gas. The liquid in the liquid chamber 12 is injected by the liquid inlet pipe 9 after the centrifugal fan impeller 4 rotates, and the gas in the gas chamber 13 is the gas which is sucked from the air inlet by the centrifugal fan impeller 4 and is compressed after being mixed with the liquid in the liquid chamber 12. The gas is sucked and then mixed with the liquid to form bubbles or airflow with certain pressure, when the liquid and the gas are in equal pressure, the density of the bubbles or the airflow is smaller than that of the liquid to float upwards, the floating gas is continuously converged to form compressed gas, the compressed gas is filled in the gas chamber 13, and the compressed gas in the gas chamber 13 is discharged from the gas outlet 11.

The highest end of the liquid chamber 12 is positioned in the range of 1/4-4/5 of the height of the shell 1, the highest end of the liquid chamber 12 can be positioned at 1/4, 1/3, 4/5, 3/5 or 1/2 of the height H of the shell, and the upper surface of the liquid filled in the liquid chamber 12 is relatively stable when the centrifugal fan impeller 4 rotates at the highest speed as the basis for designing the height of the liquid chamber 12. The high position, the low position, the left position and the right position of the invention all take the position shown in the figure as a reference position. The housing height H is defined as the height H from the lowest end of the housing to the highest end of the housing, as shown in fig. 4, 7, 8, 10, and 11.

The air duct 8 is a truncated cone or a cylinder, and the large-diameter end of the truncated cone is positioned at the upper end of the shell 1. The truncated cone of the air duct 8 is used as the optimal scheme, and the structure is convenient for the maximum air inlet and is easy to be matched with the centrifugal fan impeller 4 at the bottom end.

The motor is arranged on the upper part or the lower part of the shell 1 or the air duct 8. The motor mounting position can also be selected to be positioned on either side of the left and right of the shell, such as: the centrifugal fan impeller 4 is connected with the motor through a connecting piece, the connecting piece is a commutator (26), a transverse input shaft extension shaft 27 and a coupler, the commutator 26 is installed at the bottom end of the shell 1 and connected with the centrifugal fan impeller 4, and the commutator 26 is connected with the motor 3 through the transverse input shaft extension shaft 27 and the coupler. For another example: centrifugal fan impeller 4 is located 8 bottom outsides of dryer, and centrifugal fan impeller 4 meets through transmission shaft and motor, and the transmission shaft is located the dryer and passes the dryer bottom, and the motor is located 8 upper portions of dryer. The following steps are repeated: centrifugal fan impeller 4 is located 8 bottom lower parts of dryer, and centrifugal fan impeller 4 meets through the connecting axle with the motor, and motor 3 is located 1 bottom outer end of casing.

The further scheme of the invention is as follows: the bottom of the shell 1 is provided with a cone frustum cylinder 22, the large diameter end of the cone frustum cylinder 22 is connected with the inner wall of the shell 1, the small diameter end of the cone frustum cylinder 22 is connected with a sealing plate 28 of the shell 1, and the inner diameter of the small diameter end of the cone frustum cylinder 22 is larger than the maximum diameter of the centrifugal fan impeller 4. This is one of the preferable solutions provided for preventing the liquid leakage and the easy formation of the eddy current in the bottom area of the housing 1 when no sealing member is used for the gap between the output shaft of the motor and the central shaft hole at the bottom of the housing 1. The scheme can lead the liquid to collide the inner wall of the cone-shaped cylinder 22 during operation, thereby generating upward component force, reducing the leakage of the liquid generated by the gap between the lower end of the centrifugal fan impeller 4 and the bottom of the shell 1, reducing the eddy current generated by the liquid at the edge of the bottom of the shell and reducing the loss. When the gap between the output shaft of the motor and the central shaft hole at the bottom of the shell adopts a shaft seal device, no liquid leaks at the position, and the conical table cylinder 22 is not required to be arranged. When the bottom of the shell 1 is closed, accumulated liquid or dirt and the like can be formed in the cavity at the bottom, a drain pipe 16 is arranged at the lower part of the bottom of the shell 1, and the outlet of the drain pipe 16 extends out from one side of the support 17, so that the sewage can be drained conveniently.

The further scheme of the invention is as follows: the bottom end of the air duct 8 is provided with a ring 20, the ring 20 is parallel to the front disk of the centrifugal fan impeller 4 and is provided with a gap, the upper surface of the ring 20 is provided with reinforcing ribs 30, and the reinforcing ribs 30 are radially and uniformly distributed by taking the circle center of the ring as the center. A circular ring 20 is arranged at the upper end of the centrifugal fan impeller 4 and used for preventing liquid or gas at the outer circle of the impeller of the centrifugal fan impeller 4 from flowing back between the front disc of the impeller and an air inlet so as to reduce energy loss.

The highest end of the liquid chamber 12 is located in the range of 1/4-4/5 of the height H of the shell, and when a special shell structure or a special shell shape is adopted and exceeds the range, the design basis that the liquid surface is stable and no splash is generated is taken as the basis.

One of the preferred solutions provided by the present invention is that the middle of the closing plate 28 at the bottom of the housing 1 is connected with the bearing seat 18 in a closing manner.

The closed structure at the bottom end of the shell 1 is closed by a closing plate or closed by the closing plate and a bearing seat together, the bearing seat is positioned in the middle of the closing plate, an output shaft penetrates through a shaft hole in the middle of the closing plate to be connected with a centrifugal fan impeller, and the closing plate is connected with the bearing seat shell to form the closed structure at the bottom end of the shell.

The supporting rib plates 21 are a reinforced stable structure between the shell 1 and the lower part of the air duct 8, and are radially and uniformly connected between the center of the air duct and the center of the air duct.

The centrifugal fan wheel 4 according to the invention can be embodied in many forms and is not limited to the two forms listed in the examples.

When the centrifugal liquid relay supercharging air compressor works, the starting motor 3 drives the centrifugal fan blade 4 to rotate, then liquid is filled into the liquid chamber 12 through the liquid inlet pipe 9, and liquid adding is stopped when the upper surface of the liquid reaches the highest end of the liquid chamber 12. The air is sucked in by the air inlet 6 at the initial rotation stage of the centrifugal fan impeller 4, is thrown out from the outer circle of the centrifugal fan impeller 4, enters the liquid chamber 12 and the gas chamber 13, and is discharged through the air outlet 11 at the upper part of the gas chamber 13. When no liquid is added, the motor 3 is started, the air pressure of the air compressor is generally not more than 5000pa, when the liquid in the liquid chamber 12 is gradually filled, the centrifugal fan impeller 4 rotating at a high speed is immersed in the liquid, the liquid entering the fluid channel of the impeller and the sucked gas are wrapped together and thrown out by the impeller, gas-liquid mixing is realized, the fluid in the fluid channel of the impeller is in a gas-liquid two-phase mixed state, the gas-liquid two-phase mixed state fluid forms a circular mixed layer in the peripheral range of the impeller, and the gas in the mixed layer is mixed with the liquid in a bubble state. Because the density of the gas is far less than that of the liquid, the bubbles of the mixing layer float upwards and are separated from the liquid, and finally float upwards into the gas chamber 13 and are converged to form compressed gas. When the gas-liquid two-phase mixed flow floats upwards, the liquid close to the inner wall of the shell flows downwards to fill the space left by the rising of the gas-liquid two-phase mixed flow and flows into the impeller fluid channel, and the last movement process is repeated to complete a cycle. The centrifugal fan wheel 4 rotates continuously and gas is continuously sucked in and collected in the gas chamber 13. The liquid is continuously mixed with air through the rotation of the impeller in the liquid chamber, accelerated, thrown out, separated and continuously and circularly moved, so that more and more gas in the gas chamber of the shell is gathered, the pressure is gradually increased, and high-pressure gas is generated and is discharged through the gas outlet 11 for gas load.

In the working process of the invention, as the gas cavity is communicated with the liquid cavity, when the gas pressure is increased, the pressure of the gas-liquid mixing layer in the liquid cavity is synchronously increased, the rotation resistance of the impeller is correspondingly increased, and the output power of the motor is synchronously increased. The air outlet pressure is gradually increased from zero, the power consumption of the motor is synchronously changed from zero to rated output power, and the adjustment of the rotating speed of the impeller, the adjustment of the air outlet load and the like are realized by the controller.

The invention adopts liquid as a relay compression medium, thereby achieving the purpose of improving the air outlet pressure.

The liquid level display sensor 14 and the pressure display sensor 15 arranged on the air compressor can be connected with a controller, and the controller sets an automatic monitoring program to automatically monitor parameters such as liquid level, pressure and the like.

The details of the present invention are not described in detail in the prior art.

Claims

1. The utility model provides a centrifugal liquid relay booster air compressor machine, includes casing (1), its characterized in that:

the bottom end of a shell (1) is provided with a support (17), a wind barrel (8) is installed in the shell (1), the upper part of the wind barrel (8) is provided with an air inlet (6), a cavity is formed in the wind barrel (8), the cavity is an air inlet channel, a liquid chamber (12) is arranged between the outer wall of the wind barrel (8) and the inner wall of the shell (1), an air chamber (13) is arranged from the upper part of the liquid chamber (12) to the top of the shell (1), the liquid chamber (12) is communicated with the air chamber (13), the bottom of the shell (1) is provided with a sealing plate (28), the upper ends of the outer walls of the shell (1) and the wind barrel (8) are in sealing connection, an air outlet (11) is formed in the upper end of the air chamber (13) of the shell (1), a centrifugal fan impeller (4) is installed in the shell (1), the centrifugal fan impeller (4) is connected with a motor through a connecting piece, a liquid inlet pipe (9) is arranged on the upper portion of the shell (1) and the upper portion of the liquid cavity (12), a liquid outlet pipe (10) is arranged on the lower portion of the shell (1), and the circle centers of the shell (1), the air duct (8) and the centrifugal fan impeller (4) are located on the same vertical axis.

2. The centrifugal liquid relay booster air compressor of claim 1, characterized in that: the wind barrel (8) is a truncated cone or a cylinder, and the large-diameter end of the truncated cone is positioned at the upper end of the shell (1).

3. The centrifugal liquid relay booster air compressor of claim 1, characterized in that: the motor is arranged on the upper part or the lower part of the shell (1) or the air duct (8).

4. The centrifugal liquid relay booster air compressor of claim 1, characterized in that: the centrifugal fan impeller (4) is located outside the bottom end of the air duct (8), the centrifugal fan impeller (4) is connected with the motor through the transmission shaft, the transmission shaft is located in the air duct and penetrates through the bottom end of the air duct, and the motor is located on the upper portion of the air duct (8).

5. The centrifugal liquid relay booster air compressor of claim 1, characterized in that: the centrifugal fan impeller (4) is positioned at the lower part of the bottom end of the air duct (8), the centrifugal fan impeller (4) is connected with the motor through a connecting shaft, and the motor (3) is positioned at the outer end of the bottom of the shell (1).

6. The centrifugal liquid relay booster air compressor of claim 1, characterized in that: the bottom end of the air duct (8) is provided with a circular ring (20), the circular ring (20) is parallel to the front disc of the centrifugal fan impeller (4) and is provided with a gap, the upper surface of the circular ring (20) is provided with reinforcing ribs (30), and the reinforcing ribs (30) are radially and uniformly distributed by taking the circle center of the circular ring as the center.

7. The centrifugal liquid relay booster air compressor of claim 1, characterized in that: the highest end of the liquid chamber (12) is positioned in the range of 1/4-4/5 of the height H of the shell.

8. The centrifugal liquid relay booster air compressor of claim 1, characterized in that: the centrifugal fan impeller (4) is connected with the motor through a connecting piece, the connecting piece is a commutator (26), a transverse input shaft extension shaft (27) and a coupler, the commutator (26) is installed at the bottom end of the shell (1) and is connected with the centrifugal fan impeller (4), and the commutator (26) is connected with the motor (3) through the transverse input shaft extension shaft (27) and the coupler.

9. The centrifugal liquid relay booster air compressor of claim 1, characterized in that: the middle part of a closing plate (28) at the bottom of the shell (1) is connected with the bearing seat (18) in a closing way.