Cooling air path structure of air-cooled compressor

Abstract

The utility model discloses a cooling air path structure of an air-cooled compressor, and particularly relates to the technical field of fans and air compressors, the cooling air path structure comprises a fan shell and a rotating shaft, a side plate is fixed on one side of the fan shell, an exhaust port is arranged on the outer side wall of the fan shell, the rotating shaft is arranged in the fan shell, and the side plate is fixed on the rotating shaft. A first impeller is installed on one side of the rotating shaft, and a second impeller is installed on the other side of the rotating shaft. The exhaust port and the connecting disc are arranged, the connecting disc is installed in the tail cover, the rotating shaft penetrates out of the positioning hole in the center to rotate, the second impeller is driven by the rotating shaft to rotate, and external air enters the tail cover through the air inlet and enters the fan shell through an inner channel of the tail cover and an airflow channel in the surface of the connecting disc; and finally, the air passes through the stator end plate and then is exhausted from the exhaust port under the pressure difference effect, and the utilization efficiency of the second impeller of the cooling air path structure of the air cooling compressor is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of fans and air compressors, in particular to a cooling air path structure of an air-cooled air compressor. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. The main structural components of a fan are impellers, casings, air inlets, brackets, motors, pulleys, couplings, silencers, transmission parts, etc. It is widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and air induction of boilers and industrial furnaces, cooling and ventilation in air conditioning equipment and household appliances, drying and selection of grains, wind tunnel wind sources and inflation and propulsion of hovercraft, etc.

[0003] At present, the air inlet of the cooling air circuit of the compressor is arranged at the compressor fan casing, and the exhaust port is arranged at the air-cooled impeller connecting plate. The negative pressure formed by the air-cooled impeller draws air from the inlet to drive the air circulation in the cooling air circuit, thereby realizing the cooling of the motor main shaft and the motor stator. However, because its air-cooled impeller can only cool the compressor motor and bearings, the negative pressure formed at its inlet is not effectively utilized, so the power consumption of the air-cooled impeller reduces the efficiency of the whole machine. Utility Model Content

[0004] The utility model aims to provide a cooling air path structure for an air-cooled compressor, so as to solve the problem of low impeller utilization rate proposed in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a cooling air path structure of an air-cooled compressor, comprising a fan housing and a rotating shaft, a side plate is fixed to one side of the fan housing, a side cover is installed on one side of the side plate, an outer wall of the fan housing is provided with an exhaust port, a tail cover is installed on the other side of the fan housing, an air inlet is fixed on one side of the tail cover, a connecting disk is installed inside the side cover, a positioning hole is provided at a central position inside the connecting disk, an air flow channel is provided on the surface of the connecting disk, a stator end plate is installed on the inner side wall of the fan housing, a motor stator is installed on the inner side of the stator end plate, a rotating shaft is provided inside the fan housing, one side of the rotating shaft extends to the inside of the side cover, a first impeller is installed on one side of the rotating shaft, the other side of the rotating shaft extends to the inside of the tail cover, and a second impeller is installed on the other side of the rotating shaft.

[0006] Preferably, a base is installed at the bottom end of the fan housing, a mounting seat is fixed to the bottom end of the base, and a reinforcement plate is fixed to the outer side wall of the base.

[0007] Preferably, a mounting hole is provided at the top of the fan housing, and a hanging ring is provided inside the mounting hole.

[0008] Preferably, the surface of the hanging ring is provided with an external thread, the interior of the mounting hole is provided with an internal thread, and the mounting hole and the hanging ring are connected via threads.

[0009] Preferably, a plurality of exhaust ports are provided on the outer side wall of the fan housing, and the plurality of exhaust ports are distributed in a ring shape.

[0010] Preferably, four groups of the airflow channels are arranged on the surface of the connecting plate, and the four groups of the airflow channels are symmetrically distributed.

[0011] Preferably, the cross section of the rotating shaft is smaller than the cross section of the positioning hole, and the rotating shaft and the positioning hole form a rotating structure.

[0012] Compared with the prior art, the utility model has the following beneficial effects: by providing an exhaust port and a connection plate, the connection plate is installed inside the tail cover, and the positioning hole at the center position is used for the rotating shaft to pass through and rotate. As the rotating shaft drives the second impeller to rotate, the external air enters the tail cover through the air inlet, and enters the fan housing through the internal channel of the tail cover and the air flow channel on the surface of the connection plate, cools the motor stator and the rotating shaft, and finally passes through the stator end plate and is discharged from the exhaust port by the pressure difference, thereby enhancing the utilization efficiency of the second impeller of the cooling air path structure of the air-cooled compressor;

[0013] A base and a mounting seat are provided, the base and the mounting seat are located at the bottom of the fan housing and are used to support the fan housing, and the reinforcement plate outside the base is used to reinforce the base to prevent the base from being deformed during use, thereby achieving support fixity of the cooling gas path structure of the air-cooled compressor during use;

[0014] By providing a lifting ring, the lifting ring is installed at the top of the fan casing through threaded cooperation with the mounting hole. With the help of the installed lifting ring, operations such as suspension can be assisted, so as to assist the device in transportation and movement, thereby realizing the auxiliary function of the cooling air path structure of the air-cooled compressor during transportation and movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 It is a side view structural schematic diagram of the utility model;

[0018] Figure 4 It is a schematic diagram of the side structure of the connection disk of the utility model.

[0019] In the figure: 1. fan casing; 2. base; 3. mounting seat; 4. reinforcement plate; 5. side plate; 6. side cover; 7. mounting hole; 8. lifting ring; 9. exhaust port; 10. tail cover; 11. air inlet; 12. connecting plate; 13. positioning hole; 14. air flow channel; 15. motor stator; 16. stator end plate; 17. rotating shaft; 18. first impeller; 19. second impeller. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model provides an embodiment: a cooling air path structure of an air-cooled compressor, comprising a fan housing 1 and a rotating shaft 17, a base 2 is installed at the bottom end of the fan housing 1, a mounting seat 3 is fixed at the bottom end of the base 2, and a reinforcing plate 4 is fixed to the outer wall of the base 2;

[0022] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, when in use, the base 2 cooperates with the mounting seat 3 to support and fix the fan housing 1, and the multiple sets of reinforcement plates 4 at the side are used to reinforce and fix the base 2 to avoid deformation during use;

[0023] A side plate 5 is fixed to one side of the fan housing 1, a side cover 6 is installed to one side of the side plate 5, a mounting hole 7 is arranged at the top of the fan housing 1, a lifting ring 8 is arranged inside the mounting hole 7, an external thread is arranged on the surface of the lifting ring 8, an internal thread is arranged inside the mounting hole 7, and the mounting hole 7 is connected to the lifting ring 8 through threads;

[0024] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, when in use, the lifting ring 8 is installed at the mounting hole 7 on the top of the fan housing 1 through a thread, and can assist the device to be matched with the lifting device to carry and move the device;

[0025] The outer wall of the fan housing 1 is provided with an exhaust port 9, and a plurality of exhaust ports 9 are provided on the outer wall of the fan housing 1, and the plurality of exhaust ports 9 are distributed in a ring shape. A tail cover 10 is installed on the other side of the fan housing 1, and an air inlet 11 is fixed on one side of the tail cover 10. A connecting plate 12 is installed inside the side cover 6, and a positioning hole 13 is provided at the center position inside the connecting plate 12. An air flow channel 14 is provided on the surface of the connecting plate 12, and four groups of air flow channels 14 are provided on the surface of the connecting plate 12. The four groups of air flow channels 1 4 are symmetrically distributed, a stator end plate 16 is installed on the inner side wall of the fan housing 1, a motor stator 15 is installed on the inner side of the stator end plate 16, a rotating shaft 17 is arranged inside the fan housing 1, one side of the rotating shaft 17 extends to the inside of the side cover 6, the cross section of the rotating shaft 17 is smaller than the cross section of the positioning hole 13, the rotating shaft 17 and the positioning hole 13 form a rotating structure, a first impeller 18 is installed on one side of the rotating shaft 17, the other side of the rotating shaft 17 extends to the inside of the tail cover 10, and a second impeller 19 is installed on the other side of the rotating shaft 17;

[0026] Specifically, Figure 1 , Figure 2 and Figure 4 As shown, when in use, the shaft 17 rotates and the second impeller 19 located at the tail end rotates. At this time, the outside air enters the tail cover 10 through the air inlet 11, passes through the cavity airway inside the tail cover 10, and the airflow channel 14 on the surface of the connecting plate 12, enters the fan housing 1, and is discharged through the exhaust port 9 after the shaft 17 and the motor stator 15 are cooled.

[0027] Working principle: When in use, start the rotating shaft 17, and the first impeller 18 and the second impeller 19 at the front and rear ends of the rotating shaft 17 rotate. The side cover 6 and the first impeller 18 inside are used like a normal fan. The air inlet 11 at the tail end can be connected to a device that requires negative pressure. The gas enters the tail cover 10 through the air inlet 11, and then passes through the air chamber inside the tail cover 10 and the air flow channel 14 on the surface of the connecting plate 12 to enter the fan casing 1. After completing the cooling operation of the rotating shaft 17 and the motor stator 15, the ventilation is completed through the pressure difference between the inside and outside of the fan casing 1, and the gas is discharged through the multiple groups of exhaust ports 9 on the surface of the fan casing 1, thereby improving the utilization rate and efficiency of the negative pressure fan.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A cooling air path structure for an air-cooled compressor, comprising a fan housing (1) and a rotating shaft (17), characterized in that: A side plate (5) is fixed to one side of the fan housing (1), a side cover (6) is installed to one side of the side plate (5), an outer wall of the fan housing (1) is provided with an exhaust port (9), a tail cover (10) is installed to the other side of the fan housing (1), an air inlet (11) is fixed to one side of the tail cover (10), a connection plate (12) is installed inside the side cover (6), a positioning hole (13) is provided at a central position inside the connection plate (12), and an air inlet (11) is provided on the surface of the connection plate (12). A flow channel (14), a stator end plate (16) is installed on the inner side wall of the fan housing (1), a motor stator (15) is installed on the inner side of the stator end plate (16), a rotating shaft (17) is arranged inside the fan housing (1), one side of the rotating shaft (17) extends to the inside of the side cover (6), a first impeller (18) is installed on one side of the rotating shaft (17), the other side of the rotating shaft (17) extends to the inside of the tail cover (10), and a second impeller (19) is installed on the other side of the rotating shaft (17).

2. The cooling air path structure of an air-cooled compressor according to claim 1, characterized in that: A base (2) is installed at the bottom end of the fan housing (1), a mounting seat (3) is fixed to the bottom end of the base (2), and a reinforcement plate (4) is fixed to the outer side wall of the base (2).

3. The cooling air path structure of an air-cooled compressor according to claim 2, characterized in that: A mounting hole (7) is provided at the top end of the fan housing (1), and a hanging ring (8) is provided inside the mounting hole (7).

4. The cooling air path structure of an air-cooled compressor according to claim 3, characterized in that: The surface of the lifting ring (8) is provided with an external thread, the interior of the mounting hole (7) is provided with an internal thread, and the mounting hole (7) and the lifting ring (8) are connected via threads.

5. The cooling air path structure of an air-cooled compressor according to claim 1, characterized in that: A plurality of the exhaust ports (9) are arranged on the outer side wall of the fan housing (1), and the plurality of the exhaust ports (9) are distributed in a ring shape.

6. The cooling air path structure of an air-cooled compressor according to claim 1, characterized in that: Four groups of the airflow channels (14) are arranged on the surface of the connection plate (12), and the four groups of the airflow channels (14) are symmetrically distributed.

7. The cooling air path structure of an air-cooled compressor according to claim 1, characterized in that: The cross section of the rotating shaft (17) is smaller than the cross section of the positioning hole (13), and the rotating shaft (17) and the positioning hole (13) form a rotating structure.

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