Two-stage screw air compressor

Abstract

The utility model relates to the technical field of air compressors, and discloses a two-stage screw air compressor, which comprises an air compressor set, an outer frame and an electric control cabinet, the air compressor set comprises an air compressor main body, a machine head and a motor, the machine head and the motor share a main shaft, the air compressor main body is connected with an air inlet assembly, an air outlet assembly and an oil way system, the motor and the machine head are both provided with water cooling cylinder sleeves, water inlets and water outlets are formed in the water cooling cylinder sleeves, the water inlets are jointly connected with a water inlet pipe, and the water outlets are jointly connected with a water outlet pipe. The cooling device has a cooling function and is good in cooling effect.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, and particularly relates to a two-stage screw air compressor. Background Technique

[0002] Screw air compressors are currently used in various industries. The existing patent with the publication number "CN115898872A" and the patent name "A Medium-pressure Screw Air Compressor" discloses an air compressor. Compared with traditional high-pressure small pistons, this air compressor has advantages such as a long maintenance cycle and low maintenance costs. However, during the use of the air compressor, a large amount of heat will be generated by the motor and the air compressor body, and these heats will affect the normal operation of the air compressor, so a new screw air compressor is needed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a two-stage screw air compressor with a cooling function and good cooling effect.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions:

[0005] A two-stage screw air compressor, characterized in that it includes an air compressor unit, an outer frame and an electric control cabinet. The air compressor unit includes an air compressor main body, a head and a motor. The head and the motor share a main shaft. The air compressor main body is connected with an air intake assembly, an air outlet assembly and an oil circuit system. The motor and the head are both provided with water-cooled cylinder sleeves. The water-cooled cylinder sleeves are provided with a water inlet and a water outlet. The water inlets are commonly connected with a water inlet pipe, and the water outlets are commonly connected with a water outlet pipe.

[0006] As a further setting of the utility model, the air intake assembly includes an air intake valve, and the air intake valve is connected with an air filter.

[0007] As a further setting of the utility model, the air outlet assembly includes an oil-gas separator connected to the air compressor main body. A pressure maintenance valve and a safety valve are connected to the top of the oil-gas separator, and the air outlet end of the oil-gas separator is connected with a post-cooler.

[0008] As a further setting of the utility model, the oil circuit system includes a temperature control valve, an oil cut-off valve and an oil filter connected to the air compressor main body in sequence.

[0009] The beneficial effects of the utility model are:

[0010] The utility model is mainly used in ships and offshore engineering equipment. When using seawater for cooling, it is equipped with a water-cooled cylinder liner and can be directly cooled by seawater or fresh water. Compared with the traditional air cooling, this structure has better cooling effect, and can streamline the system composition and volume. This type of air compressor combines the advantages of screw compressors and scroll compressors, making this screw air compressor have the advantages of simple structure, small volume, light weight, continuous operation, more stable operation, small vibration, low noise, higher reliability, low failure rate, longer maintenance cycle, and fewer vulnerable parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a schematic diagram of the overall structure of this embodiment;

[0013] In the figure, 1. Outer frame, 2. Electric control cabinet, 3. Air compressor main body, 4. Head, 5. Motor, 6. Intake assembly, 61. Air filter, 7. Exhaust assembly, 71. Oil-gas separator, 72. Pressure maintaining valve, 73. Aftercooler, 8. Oil circuit system, 81. Temperature control valve, 82. Oil filter, 9. Water-cooled cylinder liner, 10. Water inlet pipe, 11. Water outlet pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following will clearly and completely describe the technical solutions of the present utility model in combination with specific embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0015] Embodiment

[0016] A two-stage screw air compressor, characterized in that: it includes an air compressor unit, an outer frame 1 and an electric control cabinet 2. The air compressor unit includes an air compressor main body 3, a head 4 and a motor 5. The head 4 and the motor 5 share a main shaft. The air compressor main body 3 is connected with an intake assembly 6, an exhaust assembly 7 and an oil circuit system 8. The motor 5 and the head 4 are both provided with a water-cooled cylinder liner 9. The water-cooled cylinder liner 9 is provided with a water inlet and a water outlet. The water inlets are commonly connected with a water inlet pipe 10, and the water outlets are commonly connected with a water outlet pipe 11.

[0017] Further, the intake assembly 6 includes an intake valve, and the intake valve is connected with an air filter 61.

[0018] Further, the air outlet assembly 7 includes an oil-gas separator 71 connected to the main body 3 of the air compressor. A pressure maintenance valve 72 and a safety valve are connected to the top of the oil-gas separator 71. The air outlet end of the oil-gas separator 71 is connected to a post-cooler 73.

[0019] Further, the oil circuit system 8 includes a temperature control valve 81, an oil cut-off valve, and an oil filter 82 that are sequentially connected to the main body 3 of the air compressor.

[0020] The working principle of the present utility model:

[0021] During operation, the motor 5 drives the main unit of the air compressor to work. During the working process, seawater is introduced into the water inlet pipe 10. The seawater enters the water-cooled cylinder liners 9 of the motor 5 and the machine head 4 through the water inlet pipe 10 to cool the motor 5 and the machine head 4.

Claims

1. A two-stage screw air compressor, characterized in that: It includes an air compressor unit, an outer frame (1) and an electric control cabinet (2). The air compressor unit includes an air compressor main body (3), a machine head (4) and an electric motor (5). The machine head (4) and the electric motor (5) share a main shaft. The air compressor main body (3) is connected with an air inlet assembly (6), an air outlet assembly (7) and an oil circuit system (8). The electric motor (5) and the machine head (4) are both provided with water-cooled cylinder sleeves (9). The water-cooled cylinder sleeves (9) are provided with a water inlet and a water outlet. The water inlets are commonly connected with a water inlet pipe (10), and the water outlets are commonly connected with a water outlet pipe (11).

2. The two-stage screw air compressor according to claim 1, characterized in that: The air inlet assembly (6) includes an air inlet valve, and the air inlet valve is connected with an air filter (61).

3. A two-stage screw air compressor according to claim 1, characterized in that: The air outlet assembly (7) includes an oil-gas separator (71) connected to the air compressor main body (3). The top of the oil-gas separator (71) is connected with a pressure maintaining valve (72) and a safety valve. The air outlet end of the oil-gas separator (71) is connected with a post-cooler (73).

4. A two-stage screw air compressor according to claim 1, characterized in that: The oil circuit system (8) includes a temperature control valve (81), an oil cut-off valve and an oil filter (82) sequentially connected to the air compressor main body (3).

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