First-stage and second-stage independent circulation compressor

Abstract

The utility model discloses a first-stage and second-stage independent circulating compressor, which relates to the field of compressors and comprises a motor, a crankcase, a crankshaft arranged in the crankcase, and a first first-stage cylinder, a first second-stage cylinder, a second first-stage cylinder and a second second-stage cylinder which are arranged on the crankcase, a first air guide pipe is connected between an air outlet of the first primary air cylinder and an air inlet of the first secondary air cylinder, a second air guide pipe is connected between an air outlet of the second primary air cylinder and an air inlet of the second secondary air cylinder, and a first cooler is arranged on the first air guide pipe. And a second cooler is arranged on the second gas guide pipe. The high-pressure air supply device can be continuously used for supplying high-pressure air meeting the requirements under the condition that one air cylinder is damaged.

Description

Technical Field

[0001] The present application relates to the field of compressors, and in particular to a primary and secondary independent circulation compressor. Background Art

[0002] A compressor is a driven fluid machine that boosts low-pressure gas to high-pressure gas. In order to stably provide sufficient flow and high-pressure gas, four-cylinder two-stage compression is usually adopted, that is, the compressor is equipped with four cylinders, two primary cylinders and two secondary cylinders.

[0003] The working principle of the currently common four-cylinder two-stage compressor is: first, the two first-stage cylinders compress the air, then the air compressed by the two first-stage cylinders is uniformly transported to an intermediate buffer tank, and the two second-stage cylinders then draw air from the intermediate buffer tank for compression, and finally, the two second-stage cylinders compress the air for the second time and then discharge it.

[0004] During the operation of the above-mentioned existing equipment, once one of the first-stage cylinders or the second-stage cylinders is damaged, the entire equipment will no longer be able to provide high-pressure gas of sufficient pressure. In actual application, during the working hours of the factory, once the equipment is damaged, the entire production line cannot operate, and the economic losses generated are huge. The most ideal way to deal with it is to maintain it for a period of time and repair the equipment during the rest period at noon or in the evening. Utility Model Content

[0005] In order to enable the compressor to continue operating when a single cylinder is damaged, the present application provides a first and second stage independent circulation compressor.

[0006] The present application provides a one-stage and two-stage independent circulation compressor adopts the following technical solution:

[0007] A one-stage and two-stage independent circulation compressor comprises a motor, a crankcase, a crankshaft arranged in the crankcase, and a first primary cylinder, a first secondary cylinder, a second primary cylinder, and a second secondary cylinder arranged on the crankcase, a first air duct being connected between an air outlet of the first primary cylinder and an air inlet of the first secondary cylinder, a second air duct being connected between an air outlet of the second primary cylinder and an air inlet of the second secondary cylinder, a first cooler being arranged on the first air duct, and a second cooler being arranged on the second air duct.

[0008] By adopting the above technical solution, when in use, the motor drives the crankshaft to rotate, and then drives the first primary cylinder, the first secondary cylinder, the second primary cylinder, and the second secondary cylinder to work, wherein the first primary cylinder compresses the air and then transmits the compressed air to the first secondary cylinder through the first air duct, and then the first secondary cylinder performs secondary compression and discharges the high-pressure air; after the second primary cylinder compresses the air, it transmits the compressed air to the second secondary cylinder through the second air duct, and then the second secondary cylinder performs secondary compression and discharges the high-pressure air; two independent secondary compressions are formed, so when one of the cylinders is damaged and cannot work normally, the other set of secondary compression system can operate independently and continue to provide high-pressure air without the need to stop work immediately for maintenance; wherein the first cooler and the second cooler are used to cool the air after the first-stage compression.

[0009] Preferably, a third air duct is connected between the air outlet of the first-level cylinder and the air outlet of the second-level cylinder, an exhaust pipe is connected to the side wall of the third air duct, an end of the exhaust pipe away from the third air duct is connected to the air inlet of a third cooler, and the air outlet of the third cooler is a high-pressure air outlet for discharging secondary compressed air.

[0010] By adopting the above technical solution, the exhaust gas of the first and second cylinders is collected through the third air duct, discharged to the third cooler through the exhaust pipe, and supplied to the rear end for use after being cooled by the third cooler.

[0011] Preferably, the first cooler, the second cooler and the third cooler are integrated to form a combined cooler.

[0012] By adopting the above technical solution, the integration level is improved and the equipment structure is simplified.

[0013] Preferably, the combined cooler is an air-cooled cooler, and a fan blade is provided on a side of the combined cooler close to the crankcase, and the fan blade is drivingly connected to an end of the crankshaft away from the motor.

[0014] By adopting the above technical solution, the fan blades are directly driven by the crankshaft without the need to equip the motor again, thereby optimizing the structural design.

[0015] Preferably, the piston of the first-stage cylinder is an internal suction piston, and the piston of the second-stage cylinder is also an internal suction piston. An intermediate bracket is connected between the crankcase and the motor, and a support plate is fixed in the intermediate bracket. A through hole for passing the crankshaft is opened in the middle of the support plate, and the support plate is provided with a plurality of air supply holes connecting the crankcase and the intermediate bracket on the side around the through hole, and an air intake hole connected to the air supply hole is opened on the side wall of the intermediate bracket.

[0016] By adopting the above technical solution, the first-stage cylinder and the second-stage cylinder both extract air from the crankcase for compression, thereby accelerating the flow of air in the crankcase. At the same time, the air entering the crankcase flows through the intermediate bracket, thereby achieving cooling of the crankcase and the intermediate bracket.

[0017] Preferably, the opening of the air intake hole is connected to an air filter via a pipeline.

[0018] By adopting the above technical solution, an air filter is used to filter the air entering the middle bracket and the crankcase, thereby preventing dust from accumulating in the crankcase and the middle bracket after long-term use.

[0019] Preferably, the crankcase and the top of the motor are provided with hangers for easy lifting.

[0020] By adopting the above technical solution, it is easy to hoist the compressor.

[0021] Preferably, a plurality of shock-absorbing pads are installed on the crankcase and the bottom of the motor.

[0022] By adopting the above technical solution, the vibration transmission of the compressor when it is placed at work is reduced.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. This application designs two independent two-stage compression systems. Therefore, when one of the cylinders is damaged and cannot work normally, the other two-stage compression system can operate independently and continue to provide high-pressure air, which will not delay the work progress during the working period. The equipment can be disassembled and repaired during the rest period;

[0025] 2. Both the first-stage cylinder and the second-stage cylinder extract air from the crankcase for compression, accelerating the flow of air in the crankcase. At the same time, the air entering the crankcase flows through the middle bracket, achieving cooling of the crankcase and the middle bracket;

[0026] 3. The first cooler, the second cooler and the third cooler are integrated to form a combined cooler, and a fan is used to realize air cooling of the combined cooler, thereby optimizing the structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The overall structure of a first and second stage independent circulation compressor according to the embodiment of the present application is shown in FIG. Figure 1 ;

[0028] Figure 2 The overall structure of a first and second stage independent circulation compressor according to the embodiment of the present application is shown in FIG. Figure 2 ;

[0029] Figure 3This is a schematic diagram of an intermediate bracket in a primary and secondary independent circulation compressor according to an embodiment of the present application;

[0030] Figure 4 This is a schematic diagram of the fan blade, crankcase and crankshaft structure mainly embodied in the embodiment of the present application;

[0031] Figure numerals: 1. motor; 2. crankcase; 3. crankshaft; 4. first primary cylinder; 5. first secondary cylinder; 6. second primary cylinder; 7. second secondary cylinder; 8. first air duct; 9. second air duct; 10. third air duct; 11. exhaust pipe; 13. high-pressure air outlet; 14. combined cooler; 15. fan blade; 16. intermediate bracket; 17. support plate; 18. perforation; 19. air supply hole; 20. air intake hole; 21. air filter; 22. hanger; 23. shock-absorbing pad. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The embodiment of the present application discloses a primary and secondary independent circulation compressor.

[0034] Reference Figure 1 and Figure 4 A one-stage and two-stage independent circulation compressor comprises a motor 1, a crankcase 2, a crankshaft 3 arranged in the crankcase 2, and a first-stage cylinder 4, a first-stage cylinder 5, a second-stage cylinder 6, and a second-stage cylinder 7 arranged on the crankcase 2, referring to Figure 1 and Figure 2 A first air duct 8 is connected between the air outlet of the first primary cylinder 4 and the air inlet of the first secondary cylinder 5, a second air duct 9 is connected between the air outlet of the second primary cylinder 6 and the air inlet of the second secondary cylinder 7, a first cooler is provided on the first air duct 8, and a second cooler is provided on the second air duct 9.

[0035] When in use, the motor 1 drives the crankshaft 3 to rotate, and then drives the first primary cylinder 4, the first secondary cylinder 5, the second primary cylinder 6, and the second secondary cylinder 7 to work, wherein the first primary cylinder 4 compresses the air and then transmits the compressed air to the first secondary cylinder 5 through the first air duct 8, and then the first secondary cylinder 5 performs secondary compression and discharges the high-pressure air; the second primary cylinder 6 compresses the air and then transmits the compressed air to the second secondary cylinder 7 through the second air duct 9, and then the second secondary cylinder 7 performs secondary compression and discharges the high-pressure air; two independent secondary compressions are formed, so when one of the cylinders is damaged and cannot work normally, the other set of secondary compression system can operate independently and continue to provide high-pressure air, and there is no need to stop work for maintenance immediately, and the machine can be disassembled for maintenance during lunch break or at night; wherein the first cooler and the second cooler are used to cool the air after the first-stage compression.

[0036] Reference Figure 1 and Figure 2 A third air duct 10 is connected between the air outlet of the first secondary cylinder 5 and the air outlet of the second secondary cylinder 7. An exhaust pipe 11 is connected to the side wall of the third air duct 10. An end of the exhaust pipe 11 away from the third air duct 10 is connected to the air inlet of a third cooler. The air outlet of the third cooler is a high-pressure air outlet 13 for discharging secondary compressed air. The third cooler is used to cool the secondary compressed air. Figure 2 and Figure 4 The first cooler, the second cooler and the third cooler are integrated to form a combined cooler 14. The combined cooler 14 is an air-cooled cooler. A fan blade 15 is provided on one side of the combined cooler 14 close to the crankcase 2. The fan blade 15 is transmission-connected to the end of the crankshaft 3 away from the motor 1. The rotation of the crankshaft 3 directly drives the fan to rotate, supplying air to the combined cooler 14.

[0037] Reference Figure 2 and Figure 3The piston of the first-stage cylinder 4 adopts an inner suction piston, and the piston of the second-stage cylinder 6 also adopts an inner suction piston. The specific structure of the inner suction piston is disclosed in detail in the patent publication number CN113339241B (a compressor mounting box and a three-stage air compressor using the box). Referring to the patent drawings 8 and 9 of the patent, the inner suction piston draws air from the crankcase 2 for compression, thereby accelerating the flow of air in the crankcase 2, thereby reducing the temperature in the crankcase 2; an intermediate bracket 16 is fixed between the crankcase 2 and the motor 1, and a support plate 1 is fixed in the intermediate bracket 16. 7. A through hole 18 for passing the crankshaft 3 is provided in the middle of the support plate 17. A plurality of air delivery holes 19 are provided around the through hole 18. The air delivery holes 19 are connected to the middle bracket 16 and the inside of the crankcase 2. The air delivery holes 19 are fan-shaped. An air intake hole 20 connected to the air delivery hole 19 is provided on the side wall of the middle bracket 16. An air filter 21 is connected to the opening of the air intake hole 20 through a pipeline. The air filter 21 is used to filter air to prevent dust from accumulating in the crankcase 2 and the middle bracket 16 after long-term use. The intake air duct enters the crankcase 2 through the middle bracket 16, and also realizes the cooling of the connection between the crankshaft 3 and the middle bracket 16. A hanger 22 for easy hoisting is fixed on the top of the crankcase 2 and the motor 1, and a plurality of shock-absorbing pads 23 are installed at the bottom of the crankcase 2 and the motor 1.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A primary and secondary independent circulation compressor, characterized in that: The invention comprises a motor (1), a crankcase (2), a crankshaft (3) arranged in the crankcase (2), and a first primary cylinder (4), a first secondary cylinder (5), a second primary cylinder (6), and a second secondary cylinder (7) arranged on the crankcase (2); a first air duct (8) is connected between the air outlet of the first primary cylinder (4) and the air inlet of the first secondary cylinder (5); a second air duct (9) is connected between the air outlet of the second primary cylinder (6) and the air inlet of the second secondary cylinder (7); a first cooler is arranged on the first air duct (8), and a second cooler is arranged on the second air duct (9).

2. A one-stage and two-stage independent circulation compressor according to claim 1, characterized in that: A third air duct (10) is connected between the air outlet of the first secondary cylinder (5) and the air outlet of the second secondary cylinder (7); an exhaust pipe (11) is connected to the side wall of the third air duct (10); an end of the exhaust pipe (11) away from the third air duct (10) is connected to an air inlet of a third cooler; and an air outlet of the third cooler is a high-pressure air outlet (13) for discharging secondary compressed air.

3. A one-stage and two-stage independent circulation compressor according to claim 2, characterized in that: The first cooler, the second cooler and the third cooler are integrated to form a combined cooler (14).

4. A one-stage and two-stage independent circulation compressor according to claim 3, characterized in that: The combined cooler (14) is an air-cooled cooler. A fan blade (15) is provided on a side of the combined cooler (14) close to the crankcase (2). The fan blade (15) is drivingly connected to an end of the crankshaft (3) away from the motor (1).

5. The one-stage and two-stage independent circulation compressor according to claim 1, characterized in that: The piston of the first-stage cylinder (4) is an internal suction piston, and the piston of the second-stage cylinder (6) is also an internal suction piston. An intermediate bracket (16) is connected between the crankcase (2) and the motor (1). A support plate (17) is fixed inside the intermediate bracket (16). A through hole (18) for passing the crankshaft (3) is formed in the middle of the support plate (17). A plurality of air delivery holes (19) for connecting the crankcase (2) and the intermediate bracket (16) are formed on the periphery of the through hole (18). An air intake hole (20) connected to the air delivery hole (19) is formed on the side wall of the intermediate bracket (16).

6. The one-stage and two-stage independent circulation compressor according to claim 5, characterized in that: The opening of the air intake hole (20) is connected to an air filter (21) via a pipeline.

7. The one-stage and two-stage independent circulation compressor according to claim 1, characterized in that: A hanger (22) is provided on the top of the crankcase (2) and the motor (1) for easy hanging.

8. The one-stage and two-stage independent circulation compressor according to claim 1, characterized in that: A plurality of shock-absorbing pads (23) are installed at the bottom of the crankcase (2) and the motor (1).

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