CN216589129U - High-efficient oil spout twin-screw air compressor exhaust end cover - Google Patents

High-efficient oil spout twin-screw air compressor exhaust end cover Download PDF

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CN216589129U
CN216589129U CN202122461483.3U CN202122461483U CN216589129U CN 216589129 U CN216589129 U CN 216589129U CN 202122461483 U CN202122461483 U CN 202122461483U CN 216589129 U CN216589129 U CN 216589129U
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curve
exhaust port
end cover
region
exhaust
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邹金财
王立明
黄蕾
陈立坡
李晓庆
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CRRC Beijing Nankou Co Ltd
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CRRC Beijing Nankou Co Ltd
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Abstract

The utility model is suitable for the technical field of compressors, and provides an exhaust end cover of a high-efficiency oil injection double-screw air compressor, which comprises an end cover body and an exhaust port arranged on the end cover body; the contour curve of the exhaust port includes a first region at the left end, the outer contour of the first region including a first lower edge curve OA, a first left edge curve AB, a wave curve BC, and a first connecting curve CD; and a second region at the right end, wherein the outer contour line of the second region comprises a second lower edge curve GO, a second right edge curve FG and a second connecting curve DF, thereby compared with the original NPT184 exhaust end cover, the shape and the position of the exhaust port are changed. The improved exhaust port adopts an ideal coordinate point, so that the accumulated error of the original exhaust port in the manufacturing process is reduced, the deviation between the original exhaust port and the ideal exhaust port is reduced, and the efficiency of the compressor is improved.

Description

High-efficient oil spout twin-screw air compressor exhaust end cover
Technical Field
The utility model relates to the field of compressors, in particular to an exhaust end cover of a high-efficiency oil injection double-screw air compressor.
Background
Referring to fig. 1, the exhaust end cap is one of the key parts of an oil-injected twin-screw air compressor.
The exhaust end cover bears the axial force and the radial force of the rotor pair through the tapered roller bearing and also bears the pressure of high-pressure air at the exhaust end.
The exhaust end cover is provided with an axial exhaust port. The position and shape of the exhaust port can realize the preset internal compression of the gas in the interdental volume, different positions and shapes of the exhaust port correspond to different internal volume ratios, and the reasonable internal volume ratio can improve the economical efficiency of the machine operation.
The shape of the exhaust port on the exhaust end cover in the prior art is different from the ideal shape, so that the working efficiency of the compressor cannot be further improved.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
SUMMERY OF THE UTILITY MODEL
In view of the above defects, the utility model aims to provide an exhaust end cover of a high-efficiency oil injection double-screw air compressor, which changes the shape and the position of an exhaust port compared with the original exhaust end cover of NPT 184. The improved exhaust port adopts an ideal coordinate point, so that the accumulated error of the original exhaust port in the manufacturing process is reduced, the deviation between the original exhaust port and the ideal exhaust port is reduced, and the efficiency of the compressor is improved.
In order to achieve the aim, the utility model provides an exhaust end cover of a high-efficiency oil injection double-screw air compressor, which comprises an end cover body and an exhaust port arranged on the end cover body; the profile curve of the exhaust port includes: a first region at a left end, an outer contour line of the first region including a first lower edge curve OA, a first left edge curve AB, a wave curve BC, and a first connecting curve CD; and the second area is positioned at the right end, and the outer contour line of the second area comprises a second lower edge curve GO, a second right edge curve FG and a second connecting curve DF.
According to the exhaust end cover of the high-efficiency oil injection double-screw air compressor, the exhaust port is formed by inputting relevant parameters of an NPT184 type compressor through an established NPT 184-simulated molded line model;
wherein the input relevant parameters include: the ratio of the rotor length to the male screw outer diameter was 2/1, the male screw torsion angle was 300 °, the internal volume ratio was 4.3, the correction angle of the air intake orifice position was 2 °, and the area of the oil injection orifice was 446mm2。
According to the exhaust end cover of the high-efficiency oil injection double-screw air compressor, the exhaust port is also provided with a third area which is respectively communicated with the first area and the second area; increasing the outer contour of the exhaust port after the third region comprises: a first region at a left end, an outer contour line of the first region including a first lower edge curve OA, a first left edge curve AB, a wave curve BC, and a first connecting curve CD; a second region located at the right end, wherein an outer contour line of the second region comprises a second lower edge curve GH, a second right edge curve FG and a second connecting curve DF; the outer contour curve of the third area comprises a first transition arc ML, a second transition arc JK, a first transition straight line ON, a second transition straight line HI and a third connecting curve KL connecting the first transition arc ML and the second transition arc JK.
According to the exhaust end cover of the high-efficiency oil injection double-screw air compressor, the radiuses R of the first transition circular arc ML and the second transition circular arc JK are both 9 mm.
According to the exhaust end cover of the high-efficiency oil injection double-screw air compressor, the lower part of the end cover body is provided with a pipeline mounting hole; the upper end of the pipeline mounting port is connected with a connecting pipeline; the other end of the connecting pipeline is in arc transition connection with the exhaust port.
The utility model provides an exhaust end cover of a high-efficiency oil injection double-screw air compressor, which comprises an end cover body; the end cover body is provided with a male rotor mounting opening for mounting one end of the male rotor and a female rotor mounting opening for mounting one end of the female rotor; the end cover body is also provided with an exhaust port positioned between the male rotor mounting port and the female rotor mounting port, and gas compressed by the compressor is exhausted from the exhaust port; the lower part of the end cover body is provided with a pipeline mounting opening, and the pipeline mounting opening is connected with an external pipeline; the upper end of the pipeline mounting port is connected with a connecting pipeline; the other end of the connecting pipeline is in arc transition connection with the exhaust port. The profile curve of the exhaust port includes a first region at a left end, and the outer profile of the first region includes a first lower edge curve OA, a first left edge curve AB, a wave curve BC, and a first connecting curve CD; and a second region 200 located at the right end, wherein an outer contour line of the second region 200 includes a second lower edge curve GO, a second right edge curve FG, and a second connecting curve DF. Compared with the NPT184 original exhaust end cover, the shape and the position of the exhaust port are changed. The improved exhaust port adopts an ideal coordinate point, so that the accumulated error of the original exhaust port in the manufacturing process is reduced, the deviation between the original exhaust port and the ideal exhaust port is reduced, and the efficiency of the compressor is improved.
Drawings
FIG. 1 is a schematic view of a twin-screw air compressor to which the present invention is applied;
FIG. 2 is a front view of the present invention;
FIG. 3 is another schematic view of the vent of FIG. 2 with the addition of a third area;
FIG. 4 is a view of the connection of the duct mounting port to the exhaust port of FIG. 2;
FIG. 5 is a bottom view of FIG. 2;
FIG. 6 is an enlarged view of the structure of the exhaust port of FIG. 2;
FIG. 7 is an enlarged view of the structure of the exhaust port of FIG. 3;
FIG. 8 is a graph after simulation;
in the figure, 11-male rotor, 12-female rotor, 21-end cover body, 22-connecting pipe, 23-pipe mounting port, 24-female rotor mounting port, 25-exhaust port, 26-male rotor mounting port, 100-first zone, 200-second zone, 300-third zone.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1, 2, 4, 5 and 8, the present invention provides an exhaust end cover of a high-efficiency oil-injection twin-screw air compressor, which comprises an end cover body 21; the end cover body 21 is provided with a male rotor mounting opening 26 for mounting one end of the male rotor 11 and a female rotor mounting opening 24 for mounting one end of the female rotor 12; the end cover body 21 is also provided with an exhaust port 25 positioned between the male rotor mounting port 26 and the female rotor mounting port 24;
the lower part of the end cover body 21 is provided with a pipeline mounting opening 23; the upper end of the pipeline mounting port 23 is connected with a connecting pipeline 22; the other end of the connecting pipeline 22 is in arc transition connection with the exhaust port 25.
The profile of the exhaust port 25 includes:
a first region 100 at a left end, an outer contour line of the first region 100 including a first lower edge curve OA, a first left edge curve AB, a wave curve BC, and a first connecting curve CD;
a second area 200 located at the right end, an outer contour line of the second area 200 including a second lower edge curve GO, a second right edge curve FG, and a second connecting curve DF;
the first area 100 and the second area 200 of the exhaust port 25 are formed by simulating relevant parameters input into the NPT184 type compressor through the established NPT 184-simulated type line model;
in the simulation, the adiabatic indicating efficiency (or the Isentropic indicated efficiency) of the pressure machine at 8bar space-time at the gauge pressure is calculated by using different internal volume ratios, the highest value (91.433%) of the adiabatic indicating efficiency is selected, and the corresponding internal volume ratio is 4.3:
the input relevant parameters include: the ratio of the rotor length to the male screw outer diameter was 2/1, the male screw torsion angle was 300 °, the internal volume ratio was 4.3, the correction angle of the air intake orifice position was 2 °, and the area of the oil injection orifice was 446mm2。
FIG. 8 is a graph after simulation;
the simulated coordinate analytic values of the curve graph are as follows:
Figure BDA0003301095920000051
Figure BDA0003301095920000061
Figure BDA0003301095920000071
Figure BDA0003301095920000081
Figure BDA0003301095920000091
Figure BDA0003301095920000101
Figure BDA0003301095920000111
Figure BDA0003301095920000121
Figure BDA0003301095920000131
Figure BDA0003301095920000141
Figure BDA0003301095920000151
Figure BDA0003301095920000161
Figure BDA0003301095920000171
Figure BDA0003301095920000181
Figure BDA0003301095920000191
Figure BDA0003301095920000201
Figure BDA0003301095920000211
Figure BDA0003301095920000221
referring to fig. 3 and 7, preferably, the exhaust port 25 is further provided with a third region 300 communicating with the first region 100 and the second region 200, respectively;
the outer contour of the exhaust port 25 after the third area 300 is added includes:
a first region 100 at a left end, an outer contour line of the first region 100 including a first lower edge curve OA, a first left edge curve AB, a wave curve BC, and a first connecting curve CD;
a second region 200 located at the right end, an outer contour line of the second region 200 including a second lower edge curve GH, a second right edge curve FG, and a second connecting curve DF;
the outer contour curve of the third region 300 includes a first transition arc ML, a second transition arc JK, a first transition straight line ON, a second transition straight line HI, and a third connection curve KL connecting the first transition arc ML and the second transition arc JK; in the third region 300, the radii R of the first transition circular arc ML and the second transition circular arc JK are both 9 mm. The efficiency of the discharge port 25 at the time of discharging air can be further increased by adding the third region 300, further increasing the operating efficiency of the compressor.
In summary, the utility model provides an exhaust end cover of a high-efficiency oil injection double-screw air compressor, which comprises an end cover body; the end cover body is provided with a male rotor mounting opening for mounting one end of the male rotor and a female rotor mounting opening for mounting one end of the female rotor; the end cover body is also provided with an exhaust port positioned between the male rotor mounting port and the female rotor mounting port, and gas compressed by the compressor is exhausted from the exhaust port; the lower part of the end cover body is provided with a pipeline mounting opening, and the pipeline mounting opening is connected with an external pipeline; the upper end of the pipeline mounting port is connected with a connecting pipeline; the other end of the connecting pipeline is in arc transition connection with the exhaust port. The profile curve of the exhaust port includes a first region at a left end, and the outer profile of the first region includes a first lower edge curve OA, a first left edge curve AB, a wave curve BC, and a first connecting curve CD; and a second region 200 located at the right end, wherein an outer contour line of the second region 200 includes a second lower edge curve GO, a second right edge curve FG, and a second connecting curve DF. Compared with the NPT184 original exhaust end cover, the shape and the position of the exhaust port are changed. The improved exhaust port adopts an ideal coordinate point, so that the accumulated error of the original exhaust port in the manufacturing process is reduced, the deviation between the original exhaust port and the ideal exhaust port is reduced, and the efficiency of the compressor is improved.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (5)

1. The utility model provides a high-efficient oil spout twin-screw air compressor exhaust end cover which characterized in that includes:
the end cover comprises an end cover body and an exhaust port formed in the end cover body;
the profile curve of the exhaust port includes:
a first region at a left end, an outer contour line of the first region including a first lower edge curve OA, a first left edge curve AB, a wave curve BC, and a first connecting curve CD;
a second region located at the right end, wherein an outer contour line of the second region comprises a second lower edge curve GO, a second right edge curve FG and a second connecting curve DF;
the coordinate analytic value of the exhaust port is as follows:
Figure FDA0003301095910000011
Figure FDA0003301095910000021
Figure FDA0003301095910000031
Figure FDA0003301095910000041
Figure FDA0003301095910000051
Figure FDA0003301095910000061
Figure FDA0003301095910000071
Figure FDA0003301095910000081
Figure FDA0003301095910000091
Figure FDA0003301095910000101
Figure FDA0003301095910000111
Figure FDA0003301095910000121
Figure FDA0003301095910000131
Figure FDA0003301095910000141
Figure FDA0003301095910000151
Figure FDA0003301095910000161
Figure FDA0003301095910000171
Figure FDA0003301095910000181
Figure FDA0003301095910000191
2. the exhaust end cover of the high-efficiency oil injection twin-screw air compressor as claimed in claim 1, wherein the exhaust port is simulated by inputting relevant parameters of the NPT184 type compressor through an established NPT184 type line model;
wherein the input relevant parameters include: the ratio of the rotor length to the male screw outer diameter was 2/1, the male screw torsion angle was 300 °, the internal volume ratio was 4.3, the correction angle of the air intake orifice position was 2 °, and the area of the oil injection orifice was 446mm2。
3. The high efficiency oil injected twin screw air compressor exhaust end cap of claim 1, wherein the exhaust port is further provided with a third zone communicating with the first zone and the second zone, respectively;
increasing the outer contour of the exhaust port after the third region comprises:
a first region at a left end, an outer contour line of the first region including a first lower edge curve OA, a first left edge curve AB, a wave curve BC, and a first connecting curve CD;
a second region located at the right end, wherein an outer contour line of the second region comprises a second lower edge curve GH, a second right edge curve FG and a second connecting curve DF;
the outer contour curve of the third area comprises a first transition arc ML, a second transition arc JK, a first transition straight line ON, a second transition straight line HI and a third connecting curve KL connecting the first transition arc ML and the second transition arc JK.
4. The exhaust end cover of the high-efficiency oil injection twin-screw air compressor is characterized in that the radii R of the first transition circular arc ML and the second transition circular arc JK are both 9 mm.
5. The exhaust end cover of the high-efficiency oil injection twin-screw air compressor as claimed in claim 1, wherein the lower part of the end cover body is provided with a pipeline mounting port; the upper end of the pipeline mounting port is connected with a connecting pipeline; the other end of the connecting pipeline is in arc transition connection with the exhaust port.
CN202122461483.3U 2021-10-13 2021-10-13 High-efficient oil spout twin-screw air compressor exhaust end cover Active CN216589129U (en)

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CN202122461483.3U CN216589129U (en) 2021-10-13 2021-10-13 High-efficient oil spout twin-screw air compressor exhaust end cover

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Application Number Priority Date Filing Date Title
CN202122461483.3U CN216589129U (en) 2021-10-13 2021-10-13 High-efficient oil spout twin-screw air compressor exhaust end cover

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