CN110685907A - Small-size double screw air compressor - Google Patents

Abstract

The invention discloses a small-sized double-screw air compressor which comprises a main machine body, a bearing seat, end covers, a rotor part and a synchronizing gear, wherein the rotor part is arranged in the main machine body, two ends of the rotor part are provided with a bearing and the bearing seat, the extending part of the long end of the rotor part is provided with the synchronizing gear, and the left end cover and the right end cover are respectively arranged at the left end and the right end of the rotor part. The invention inherits the advantages of high efficiency, low energy consumption and the like of the traditional screw compression equipment, and solves the problems of overlarge appearance and overlarge noise of the air compression equipment when the equipment is operated in a limited space and used in experiments in a laboratory.

Description

Small-size double screw air compressor

Technical Field

The invention relates to the field of manufacturing of gas compression equipment, in particular to a small-sized double-screw air compressor.

Background

Air compressors have become an important support for the manufacturing industry as an indispensable tool for the machine manufacturing industry, which is an industry with rigid requirements. With the vigorous development of modern industry in China, it has become increasingly important to produce and manufacture various air compressors for use in different environments, and thus the development potential of the compressor industry is huge. With the gradual improvement of the industrial level in China, people put forward a series of new requirements on the air compressor. The air supply equipment with high compression efficiency, low energy consumption and stable performance is produced at the same time, and the air supply equipment is the double-screw air compressor. Because of its outstanding performance, it has been widely used in machinery manufacture, civil air defense facility ventilation engineering and other occasions. The invention discloses a small-sized double-screw air compressor, which provides a device which is smaller and has lower noise than the traditional air compressor for the limited space operation and laboratory experiments.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems occurring in the art, and an object of the present invention is to provide a small-sized twin-screw air compressor. The invention ensures high efficiency and low energy consumption of the equipment, and solves the problems of overlarge appearance and noise of the air compression equipment when the equipment is operated in a limited space and used in experiments in a laboratory.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a small-size double screw air compressor, includes the host computer body, bearing frame, end cover, rotor part, synchro gear, the host computer internal rotor part that sets up, the rotor part both ends set up bearing and bearing frame, the long end extension of rotor part is provided with synchro gear, both ends are provided with left end lid and right-hand member lid respectively about the rotor part.

Further, as a preferred technical solution, the rotor component includes a male rotor and a female rotor, and the male rotor and the female rotor are meshed with each other at portions in the main body.

Further, as a preferred technical scheme, the bearing seat and the bearing are in interference fit.

Further, as a preferred technical scheme, a hole is formed in a left end cover at the left end of the male rotor, and the male rotor extending hole is connected with the motor.

Further, as a preferred technical scheme, the bearing cover completely seals the gear and the bearing seat.

Further, as a preferred technical scheme, the upper left end of the main body is provided with an air suction hole with a fixed shape.

Further, as a preferred technical scheme, the main body is provided with an air vent with a fixed shape at the lower right end, and an outlet of the air vent is provided with a check valve.

The invention has the following beneficial effects:

the invention inherits the advantages of high efficiency, low energy consumption and the like of the traditional screw compression equipment, and solves the problems of overlarge appearance and overlarge noise of the air compression equipment when the equipment is operated in a limited space and used in experiments in a laboratory.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

In the figure: 1. a male rotor; 2. an engagement region; 3. a female rotor; 4. a right end cap; 5. a right bearing seat; 6. a main body; 7. a left bearing seat; 8. a pair of synchronizing gears; 9. a left end cap; 10. and a bearing.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

Example 1

As shown in fig. 1, a small-sized twin-screw air compressor comprises a main machine body, a bearing seat, an end cover, a rotor part and a synchronizing gear, wherein the rotor part is arranged in the main machine body and comprises a male rotor and a female rotor, the male rotor and the female rotor are partially meshed with each other in the main machine body, a hole is formed in the left end cover at the left end of the male rotor, and a hole extending out of the male rotor is connected with a motor. And bearings and bearing seats are arranged at two ends of the rotor component, the bearing seats are in interference fit with the bearings, and the gears and the bearing seats are completely sealed by bearing covers. The long end extending part of the rotor component is provided with a synchronizing gear, and a left end cover and a right end cover are respectively arranged at the left end and the right end of the rotor component. The main body is provided with an air suction hole with a fixed shape at the left end of the upper part. The right end of the lower surface of the main machine body is provided with an air vent with a fixed shape of an orifice, and the outlet of the air vent is provided with a check valve.

The rotor serves as the most central component of the twin screw air compressor and is actually a helical gear shaft. The rotor is formed by forming spiral teeth which are convex outwards or concave inwards on a shaft through special processing machinery. They are a pair of intermeshing male and female rotors, similar to the meshing nature of gears, when the male rotor is the driving part and the female rotor is the driven part. The two are meshed with each other to form a tooth space volume pair, and the two ends of the rotor are matched with the rolling bearing or the angular contact bearing to complete the positioning of the rotor and play a supporting role at the same time. The complex profile of the preferred rotor and the requirements during operation dictate that its roughing be done by forging, with medium carbon steel being the material.

The preferred housing is actually part of the cladding in which the working portion of the screw rotor is located. It is a transverse 8-shaped cylinder body, in which a pair of rotors are mounted, i.e. female and male rotors which are mutually meshed and parallelly-arranged in the cylinder body, and are mutually formed into a sealed cavity.

The working cycle of the twin-screw compressor during working can be divided into processes of air suction, sealing, compression and exhaust according to the sequence. During the movement of the rotor, a pair of teeth with gradually reduced meshing degree form a tooth space. This inter-tooth volume increases with the movement of the rotor to create a partial vacuum which communicates with the suction port and gas can enter under the pressure differential. The male rotor then slowly rotates out of the female rotor tooth space, the tooth space volume continues to increase and remains in communication with the suction port. When the interdental volume is increased to form a complete V-shape of space, the interdental volume space is terminated to communicate with the suction port, and the suction process is terminated. When the tooth top and the inner wall of the machine shell cavity are completely sealed, the air suction process is finished, and the air in the tooth groove exists in a closed space, so that the closed process is a critical state. As the rotor rotates, the meshing line near the right end becomes shorter or disappears, the volume space is reduced, and therefore the gas pressure in the closed space is increased gradually, which is the compression process of the gas. The compression process is only completed at the instant it is connected to the exhaust port. The exhaust process is started after the compression process is finished. In this process, the interdental volume gradually becomes smaller. The gas pressure in the interdental volume is greater than the pressure outside the vent and the pressure differential drives the internal gas out through the vent until the profile is completely lost. In this critical state, the gas in the interdental volume is completely displaced and the gas volume therein will become zero. The continuous rotation of the rotor changes the working volume, which reduces the volume of gas in the tooth space volume, thereby increasing the pressure of the gas.

In operation, the pressure of the gas in the chamber reaches a maximum at the instant when the compression process is completed, and then the gas is released immediately after the gas enters the exhaust process. Vortex noise and exhaust pulsation may be formed. Both of these phenomena are the ultimate sources of aerodynamic noise. The backlash formed by the meshing between the rotors is extremely small, so that the working efficiency is not influenced. The pressure fluctuation can be changed periodically in the working process, so that the exhaust pulsation is different. Exhaust port pressure is also a major factor affecting exhaust noise. Both of which can effectively reduce exhaust noise. In the empirical design, a check valve is installed near the exhaust hole to lower the two to reduce the noise.

The present specification and figures are to be regarded as illustrative rather than restrictive, and it is intended that all such alterations and modifications that fall within the true spirit and scope of the invention, and that all such modifications and variations are included within the scope of the invention as determined by the appended claims without the use of inventive faculty.

Claims (7)

1. The utility model provides a small-size twin-screw air compressor, includes host computer body (6), bearing (10) seat, end cover, rotor part, synchro gear pair (8), its characterized in that, host computer body (6) in set up the rotor part, the rotor part both ends set up bearing (10) and bearing (10) seat, the long end overhang of rotor part is provided with synchro gear pair (8), both ends are provided with left end lid (9) and right-hand member lid (4) respectively about the rotor part.

2. A miniature twin-screw air compressor as claimed in claim 1, characterised in that said rotor components comprise male (1) and female (3) rotors, the portions of said male (1) and female (3) rotors being intermeshed within the main body (6).

3. A miniature twin-screw air compressor as claimed in claim 1, characterised in that the bearing (10) mount is an interference fit with the bearing (10).

4. A compact twin screw air compressor as defined in claim 1. The motor is characterized in that a left end cover (9) at the left end of the male rotor (1) is provided with a hole, and the male rotor (1) extends out of the hole to be connected with the motor.

5. A compact twin screw air compressor as defined in claim 1. Characterized in that the bearing (10) cover completely seals the gear and the bearing (10) seat.

6. A compact twin screw air compressor as defined in claim 1. It is characterized in that the upper left end of the main machine body (6) is provided with an air suction hole with a fixed shape of an orifice.

7. A compact twin screw air compressor as defined in claim 1. The device is characterized in that the right end of the lower surface of the main machine body (6) is provided with an exhaust hole with a fixed shape of an orifice, and the outlet of the exhaust hole is provided with a check valve.

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