阅读说明：本技术 一种高效喷油双螺杆空气压缩机机体 (High-efficient oil spout double screw air compressor organism ) 是由 邹金财 葛楠 黄蕾 赵姣 王婷婷 于 2021-10-12 设计创作，主要内容包括：本发明适用于空气压缩机技术领域,提供了一种高效喷油双螺杆空气压缩机机体,包括机体,所述机体的内部平行且转动连接有两个螺杆,所述机体的一端安装有用于进气的进气端盖,所述机体的另一端安装有用于排气的排气端盖,所述进气端盖上与两个所述螺杆相对应的位置处均开设有圆形的安装口,所述进气端盖上开设有用于进气的进气口；本发明采用上述技术方案,吸气孔口采用了理想坐标点,减少了原吸气孔口在制造过程中的累积误差,同时也减少了原吸气孔口与理想的吸气孔口之间的偏差,提高了压缩机的效率,使比功率从6.3KW/m～(3)降至6.0KW/m～(3)。(The invention is suitable for the technical field of air compressors, and provides a high-efficiency oil injection double-screw air compressor body which comprises a body, wherein two screws are connected in the body in parallel and in a rotating mode, an air inlet end cover for air inlet is installed at one end of the body, an air outlet end cover for air outlet is installed at the other end of the body, round installing ports are formed in the positions, corresponding to the two screws, of the air inlet end cover, and an air inlet for air inlet is formed in the air inlet end cover; by adopting the technical scheme, the suction orifice adopts an ideal coordinate point, so that the accumulated error of the original suction orifice in the manufacturing process is reduced, the deviation between the original suction orifice and the ideal suction orifice is reduced, the efficiency of the compressor is improved, and the specific power is enabled to be from 6.3KW/m 3 Reduced to 6.0KW/m 3 。)

1. A high-efficiency oil injection double-screw air compressor body comprises a body, wherein one end of the body is provided with an air inlet end cover for air inlet, the other end of the body is provided with an air outlet end cover for air outlet, and the air inlet end cover is provided with an air inlet for air inlet;

the air inlet consists of a first air inlet area and a second air inlet area, and a third air inlet area is arranged at the intersection position of the first air inlet area and the second air inlet area;

the analytical values of the curve coordinates of the air inlet are as follows:

。

2. the efficient oil injection double-screw air compressor body of claim 1, wherein: a first transition curve ab protruding outwards and a second transition curve bc protruding inwards are arranged on the first air inlet area; the second air inlet area is provided with a smooth transition section de, and the third air inlet area is provided with a transition section fg protruding outwards, a transition section gh protruding inwards, a smooth transition section hi, a connecting section ij and a connecting transition section jk.

3. The efficient oil injection double-screw air compressor body as claimed in claim 2, wherein: the inside of organism is equipped with two screws, two be parallel relation between the screw rod, and two the screw rod is all rotated and is installed on the organism.

4. The efficient oil injection double-screw air compressor body of claim 3, wherein: and circular mounting openings are formed in the positions, corresponding to the two screw rods, of the air inlet end cover.

5. The efficient oil injection double-screw air compressor body of claim 4, wherein: the air inlet end cover and the air outlet end cover are fixedly arranged on the machine body through bolts.

6. The efficient oil injection double-screw air compressor body of claim 5, wherein: the exhaust end cover is provided with an air outlet for exhausting air in the machine body.

Technical Field

The invention relates to the technical field of air compressors, in particular to a high-efficiency oil injection double-screw air compressor body.

Background

At present, the air compressor is widely applied to the refrigeration field, wherein the oil injection double-screw air compressor is favored by manufacturers due to the advantages of good compression effect, stable working condition and the like, the oil injection double-screw air compressor at the present stage utilizes an air inlet at one end to suck air, air is compressed through the matching of a male rotor and a female rotor, and then high-pressure gas is discharged through an air outlet.

The position and shape of the air inlet can realize preset internal compression of air in the inter-tooth volume, the positions and shapes of different air suction ports correspond to different internal pressure ratios, the reasonable internal pressure ratio can improve the running economy (efficiency) of a machine, the existing air suction ports are complex in structure, accumulated errors are large in the manufacturing process, and the defects that the compression efficiency is low and the compressor is easy to damage are caused in the using process of the compressor.

In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.

Disclosure of Invention

In view of the above-mentioned drawbacks, the present invention provides an efficient oil injection twin-screw air compressor body, so as to solve the problems of large accumulated error and low compression efficiency in the manufacturing process proposed in the above-mentioned background art.

In order to solve the technical problems, the invention provides the following technical scheme: a high-efficiency oil injection double-screw air compressor body comprises a body, wherein an air inlet end cover for air inlet is installed at one end of the body, an air outlet end cover for air outlet is installed at the other end of the body, and an air inlet for air inlet is formed in the air inlet end cover; the air inlet consists of a first air inlet area and a second air inlet area, and a third air inlet area is arranged at the intersection position of the first air inlet area and the second air inlet area; the analytical values of the curve coordinates of the air inlet are as follows:

the following is a further optimization of the above technical solution of the present invention:

a first transition curve ab protruding outwards and a second transition curve bc protruding inwards are arranged on the first air inlet area; the second air inlet area is provided with a smooth transition section de, and the third air inlet area is provided with a transition section fg protruding outwards, a transition section gh protruding inwards, a smooth transition section hi, a connecting section ij and a connecting transition section jk.

Further optimization: two screws are arranged inside the machine body.

Further optimization: and circular mounting openings are formed in the positions, corresponding to the two screw rods, of the air inlet end cover.

Further optimization: two be parallel relation between the screw rod, and two the screw rod is all rotated and is installed on the organism.

Further optimization: the air inlet end cover and the air outlet end cover are fixedly arranged on the machine body through bolts.

Further optimization: the exhaust end cover is provided with an air outlet for exhausting air in the machine body.

The invention adopts the technical scheme, has ingenious conception, and compared with the NPT184 original machine body, the new machine body changes the shape and the position (curve coordinate point) of the air inlet, and because the air inlet adopts the ideal coordinate point, the accumulated error of the original air inlet in the manufacturing process is reduced, the deviation between the original air inlet and the ideal air inlet is also reduced, the efficiency of the compressor is improved, and the specific power is enabled to be from 6.3KW/m³Reduced to 6.0KW/m³。

Aiming at the current situation that the NPT184 type air compressor is low in energy efficiency, the efficiency of the NPT184 type air compressor is improved on the premise that the structure (molded lines, interfaces, appearance and the like) of a rotor is not changed (the cost of a forming milling cutter, a tool clamp and the like is not increased).

The efficiency of the NPT184 type air compressor is improved without changing the detail of the parts (without increasing the cost of the parts).

Drawings

FIG. 1 is a schematic diagram of the general structure of the present invention;

FIG. 2 is a schematic structural view of an intake end cover according to the present invention;

FIG. 3 is a schematic view of the structure of the air inlet of the present invention;

fig. 4 is a graph of a curve of an air intake.

In the figure: 1-body; 12-a screw; 2-an exhaust end cover; 3-an air inlet end cover; 31-a mounting port; 4-an air inlet; 41-a first air intake zone; 42-a second air intake zone; 43-third intake area.

Detailed Description

Example (b): referring to fig. 1-4, a high-efficiency oil injection twin-screw air compressor body comprises a body 1, two screws 12 are connected in the body 1 in parallel and in a rotating manner, an air inlet end cover 3 for air inlet is installed at one end of the body 1, an air outlet end cover 2 for air outlet is installed at the other end of the body 1, circular installing ports 31 are respectively formed in the positions, corresponding to the two screws 12, of the air inlet end cover 3, and an air inlet 4 for air inlet is formed in the air inlet end cover 3.

The intake port 4 is composed of a first intake region 41 and a second intake region 42, and a third intake region 43 is provided at a position where the first intake region 41 and the second intake region 42 intersect.

The first air intake region 41 is provided with a first transition curve ab protruding outwards and a second transition curve bc protruding inwards.

The second air intake region 42 is provided with a smooth transition section de, and the third air intake region 43 is provided with a transition section fg protruding outward, a transition section gh protruding inward, a smooth transition section hi, a connecting section ij, and a connecting transition section jk.

Modeling by using screw compressor design software, simulating the existing molded line of the NPT184, inputting relevant parameters of the NPT184 type compressor by using the established model of the molded line of the NPT184, calculating adiabatic indicating efficiency (or isentropic indicating efficiency) of a space-time compressor at gauge pressure of 8bar by using different internal volume ratios, and selecting the highest value (91.433%) of the adiabatic indicating efficiency, wherein the corresponding internal volume ratio is 4.3 at the moment, and the details are as follows: the ratio of the length of the rotor to the outer diameter of the male screw is 2; male screw bolt wrenchThe rotation angle is 300 degrees; the internal volume ratio is 4.3; the correction angle of the position of the air inlet 4 is 2 degrees; the area of the oil injection orifice is 446mm²The following are the curve coordinate analysis values of the intake port 4:

compared with the original NPT184 body, the new body changes the shape and position (curve coordinate point) of the air inlet 4, and because the air inlet 4 adopts an ideal coordinate point, the accumulated error of the original air inlet 4 in the manufacturing process is reduced, the deviation between the original air inlet 4 and the ideal air inlet 4 is also reduced, the efficiency of the compressor is improved, and the specific power is enabled to be 6.3KW/m³Reduced to 6.0KW/m³。

Aiming at the current situation that the NPT184 type air compressor is low in energy efficiency, the efficiency of the NPT184 type air compressor is improved on the premise that the structure (molded lines, interfaces, appearance and the like) of a rotor is not changed (the cost of a forming milling cutter, a tool clamp and the like is not increased).

The efficiency of the NPT184 type air compressor is improved without changing the detail of the parts (without increasing the cost of the parts).

In the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the 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.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

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 invention as defined in the appended claims.