Screw compressor

Abstract

The utility model provides a screw compressor, and belongs to the field of compressor assemblies. The problem that in the prior art, an oil-gas separation tank of a compressor is not high in efficiency is solved. The compressor oil-gas tank comprises a compressor oil-gas tank body, a screw machine and a motor, an end cover is fixedly installed on the front side of the compressor oil-gas tank body through a plurality of bolts, an oil separation seat is arranged at the upper end of the compressor oil-gas tank body, an oil separator is fixed on the oil separation seat, and a connecting convex body is arranged on the rear side of the compressor oil-gas tank body. Two through connecting holes and a plurality of bolt holes are formed in the connecting convex body, two transmission shafts extend out of the front side of the screw machine, the transmission shafts extend into the compressor oil gas tank body through the connecting holes, and a working cavity matched with the transmission shafts is formed in the compressor oil gas tank body; and the screw machine is fixedly connected with the compressor oil gas tank body through the connecting convex body. The utility model has the advantages of long service life, stability, safety and good sealing performance.

Description

Technical Field

[0001] This utility model belongs to the field of compressor components and relates to a screw compressor. Background Technology

[0002] Screw compressors, also known as spiral compressors, include screw air compressors and screw process compressors (such as vinyl chloride compressors). Screw compressors are positive displacement twin-screw oil-injected compressors, and are generally box-type skid-mounted structures.

[0003] Chinese patent publication number [number missing] discloses an oil-gas separator structure for an air compressor, including a separator tank body, an oil separator core inside the separator tank body, a pressure cap on the top of the separator tank body, an exhaust connection flange on the pressure cap, an oil discharge pipe connected to the bottom of the separator tank body, the oil discharge pipe being connected to a quick-connect fitting via a copper ball valve, an exhaust pipe connected to the top of the exhaust connection flange via a mounting flange, an annular groove on the top surface of the separator tank body, an annular pressing block fixed on the bottom surface of the pressure cap, the inner ring surface of the annular pressing block being inclined, a limiting protrusion ring fixed at the top of the oil separator core, and a rubber layer covering the surface of the annular pressing block. When the pressure cap is connected to the separator tank body, the annular pressing block is inserted into the annular groove, and the outer ring surface of the limiting protrusion ring of the oil separator core presses against the inclined surface of the annular pressing block. The pressure cap is fixed to the top surface of the separator tank body by bolts, with the bolts located on the outside of the annular pressing block.

[0004] The patent provides an oil-gas separator structure for an air compressor, in which oil and gas are transported and separated through several pipes. This structure is prone to blockage and has limited pressure-bearing capacity. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a screw compressor.

[0006] The objective of this utility model can be achieved through the following technical solution: A screw compressor includes a compressor oil-gas tank body, a screw compressor, and a motor. An end cover is fixedly installed on the front side of the compressor oil-gas tank body by several bolts. An oil separator seat is provided at the upper end of the compressor oil-gas tank body, and an oil separator is fixed on the oil separator seat. A connecting protrusion is located on the rear side of the compressor oil-gas tank body. The connecting protrusion has two through-holes and several bolt holes. Two drive shafts extend from the front side of the screw compressor. The drive shafts extend into the interior of the compressor oil-gas tank body through the connecting holes. A working chamber that mates with the drive shafts is provided inside the compressor oil-gas tank body. The screw compressor is fixedly connected to the compressor oil-gas tank body through the connecting protrusion. An intake valve base is welded above the screw compressor. An intake valve is fixedly connected to the intake valve base. A valve chamber is fixed to the upper end of the intake valve. A secondary oil return pipe is connected to the intake valve, and the secondary oil return pipe is connected to the oil separator seat.

[0007] In the aforementioned screw compressor, the motor has a power shaft hole inside, and a power shaft is provided on the rear side of the screw compressor, with the power shaft extending into the power shaft hole.

[0008] In the aforementioned screw compressor, a connecting ring is integrally formed on the rear side of the screw compressor, and the motor is fixedly connected to the screw compressor through the connecting ring.

[0009] In the aforementioned screw compressor, an oil filter is installed on the outside of the compressor oil tank body. The oil filter is cylindrical and extends out of the compressor oil tank body. The compressor oil tank body has an oil inlet and an oil outlet, which are connected to the oil filter.

[0010] In the aforementioned screw compressor, a minimum pressure valve is fixedly connected to the oil separator seat, and a pressure sensor is fixedly connected to the minimum pressure valve.

[0011] In one of the screw compressors described above, a safety valve base is provided on the compressor oil and gas tank body, and a safety valve is sealed and fixed on the safety valve base.

[0012] In the aforementioned screw compressor, the end cover has a temperature sensor base, and the temperature sensor base is equipped with a temperature sensor.

[0013] In the aforementioned screw compressor, the compressor oil tank body has an oil level mirror base on its side, and an oil level mirror is installed on the oil level mirror base.

[0014] In the aforementioned screw compressor, an oil drain valve base is provided at the rear of the compressor oil tank body, and an oil drain valve is installed on the oil drain valve base.

[0015] In the aforementioned screw compressor, the end cover has a temperature sensor base, and the temperature sensor base is equipped with a temperature sensor.

[0016] Compared with the prior art, the screw compressor provided by this utility model has the following advantages: 1. By connecting the screw compressor to the compressor oil tank body, the number of parts used is reduced, there are fewer vulnerable parts, and the service life is longer; 2. There is no unbalanced inertial force, the compressor oil tank body operates smoothly and safely, and the vibration is small; 3. The setting of the working chamber, end cover, oil inlet and oil outlet ensures the sealing of oil storage inside the compressor, and facilitates replacement or addition. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the compressor oil tank body structure;

[0020] Figure 4 This is a schematic diagram of the compressor oil tank body from another angle;

[0021] Figure 5 This is a schematic diagram of the compressor oil and gas tank body from the rear view.

[0022] Figure 6 This is a schematic diagram of the screw compressor structure from the rear view.

[0023] In the diagram: 1. Compressor oil tank body; 11. End cover; 111. Temperature sensor base; 112. Temperature sensor; 113. Oil level mirror base; 114. Oil level mirror; 115. Drain valve base; 116. Drain valve; 12. Oil separator seat; 13. Connecting protrusion; 131. Connecting hole; 132. Bolt hole; 14. Oil filter base; 141. Oil filter; 15. Oil inlet; 16. Oil outlet; 17. Pressure sensor; 171. Minimum pressure valve; 18. Safety valve base; 19. Working chamber; 2. Screw compressor; 21. Drive shaft; 22. Power shaft; 23. Connecting ring; 24. Intake valve base; 3. Motor; 31. Power shaft hole; 4. Oil separator; 5. Intake valve; 51. Valve chamber; 6. Secondary oil return pipeline; 7. Safety valve. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] like Figure 1 , Figure 2 and Figure 6 As shown, this utility model includes a compressor oil and gas tank body 1, a screw compressor 2, and a motor 3. An end cover 11 is fixedly installed on the front side of the compressor oil and gas tank body 1 by several bolts. A connecting protrusion 13 is provided on the rear side of the compressor oil and gas tank body 1. The connecting protrusion 13 has two through connecting holes 131 and several bolt holes 132. Two drive shafts 21 extend from the front side of the screw compressor 2. The drive shafts 21 extend into the interior of the compressor oil and gas tank body 1 through the connecting holes 131. The drive shafts 21 are connected to the interior of the compressor oil and gas tank body 1 and drive the compressor oil and gas tank body 1 to work. The screw compressor 2 is fixedly connected to the compressor oil and gas tank body 1 through the connecting protrusion 13. A power shaft hole 31 is provided inside the motor 3. A power shaft 22 is provided on the rear side of the screw compressor 2. The power shaft 22 extends into the power shaft hole 31 and is fixed. A connecting ring 23 is integrally formed on the rear side of the screw compressor 2. The motor 3 is fixedly connected to the screw compressor 2 through the connecting ring 23. The motor 3 drives the screw compressor 2 to rotate.

[0026] like Figures 3 to 5 As shown, an oil separator seat 12 is provided on the upper end of the compressor oil tank body 1. An oil separator 4 is sealed and fixed on the oil separator seat 12. A minimum pressure valve 171 is fixed on the side end face of the oil separator seat 12. A pressure sensor 17 is connected to the minimum pressure valve 171. The oil separator seat 12 is connected to the interior of the compressor oil tank body 1. A working chamber 19 is provided inside the compressor oil tank body 1. An oil inlet hole 15 and an oil outlet hole 16 are provided on the compressor oil tank body 1. The oil inlet hole 15 and the oil outlet hole 16 are arranged vertically. The oil outlet hole 16 is connected to the working chamber 19. An oil level mirror base 113 is provided on the side of the compressor oil tank body 1. An oil level mirror 114 is installed on the oil level mirror base 113. Through this design... Users can observe the oil level in the working chamber 19 through the oil level sight glass 114. When there is too much oil in the working chamber 19, users can easily remove oil. When there is too little oil in the working chamber 19, users can easily add oil, thereby ensuring the balance of oil level inside the compressor oil tank body 1. A safety valve base 18 is provided on the compressor oil tank body 1, and the safety valve 7 is sealed and fixed on the safety valve base 18. When the gas pressure inside the compressor oil tank body 1 rises, the safety valve 7 is activated and the gas inside the compressor oil tank body 1 is discharged. A drain valve base 115 is provided at the rear of the compressor oil tank body 1, and a drain valve 116 is installed on the drain valve base 115.

[0027] To elaborate further, an oil filter base 14 is provided on the rear side of the compressor oil tank body 1, and the oil filter 141 is sealed to the oil filter base 14.

[0028] To elaborate further, after the two drive shafts 21 extend into the working chamber 19 of the compressor oil and gas tank body 1, the two drive shafts 21 form a meshing state within the working chamber 19, thereby realizing the intake, exhaust, or compression functions of the compressor oil and gas tank body 1.

[0029] To elaborate further, an intake valve base 24 is welded on the top of the screw compressor 2, and an intake valve 5 is fixedly connected to the intake valve base 24. A valve chamber 51 is fixed on the upper end of the intake valve 5. The secondary oil return pipe 6 extends from the side end face of the oil separator 12 and is connected to the intake valve 5. This connection method realizes the secondary oil return function after the oil and gas separation of the compressor oil and gas tank body 1.

[0030] To elaborate further, the end cap 11 has a temperature sensor base 111, and a temperature sensor 112 is mounted on the temperature sensor base 111. The temperature sensor 112 is used to monitor the temperature of the compressor oil and gas tank body 1.

[0031] The working principle of this utility model is as follows: The motor 3 drives the screw compressor 2 to work. The drive shaft 21 of the screw compressor 2 extends into the compressor oil-gas tank body 1. When this utility model needs to draw in air, the meshing distance between the two drive shafts 21 increases, and the gas is drawn in and filled into the suction chamber inside the compressor oil-gas tank body 1. When the drive shaft 21 continues to rotate, the meshing distance between the two drive shafts 21 decreases, the gas is continuously compressed, and the pressure gradually increases. When the gas pressure reaches a certain limit, the gas begins to be discharged. Since the gas density is less than the oil density, the oil separator 4 separates the gas and oil. The oil sinks to the bottom, and the gas is discharged.

[0032] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0033] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A screw compressor, comprising a compressor oil-gas tank body (1), a screw compressor (2), and a motor (3), wherein an end cover (11) is fixedly mounted on the front side of the compressor oil-gas tank body (1) by a plurality of bolts, characterized in that: An oil separator seat (12) is provided at the upper end of the compressor oil tank body (1), and an oil separator (4) is fixed on the oil separator seat (12). A connecting protrusion (13) is provided on the rear side of the compressor oil tank body (1). The connecting protrusion (13) has two through connecting holes (131) and several bolt holes (132). Two drive shafts (21) extend from the front side of the screw compressor (2). The drive shafts (21) extend into the compressor oil tank body (1) through the connecting holes (131). The main body (1) has a working chamber (19) that cooperates with the drive shaft (21). The screw compressor (2) is fixedly connected to the compressor oil and gas tank body (1) through the connecting protrusion (13). An intake valve base (24) is welded on the top of the screw compressor (2). An intake valve (5) is fixedly connected on the intake valve base (24). A valve chamber (51) is fixed on the upper end of the intake valve (5). A secondary oil return pipe (6) is connected to the intake valve (5). The secondary oil return pipe (6) is connected to the oil separator (12).

2. A screw compressor according to claim 1, characterized in that: The motor (3) has a power shaft hole (31) inside, and the screw compressor (2) has a power shaft (22) on the rear side, which extends into the power shaft hole (31).

3. A screw compressor according to claim 1, characterized in that: The screw compressor (2) has an integrally formed connecting ring (23) on its rear side, and the motor (3) is fixedly connected to the screw compressor (2) through the connecting ring (23).

4. A screw compressor according to claim 1, characterized in that: An oil filter (141) is installed on the outside of the compressor oil tank body (1). The oil filter (141) is cylindrical and extends out of the compressor oil tank body (1). The compressor oil tank body (1) is provided with an oil inlet (15) and an oil outlet (16). The oil inlet (15) and the oil outlet (16) are connected to the oil filter (141).

5. A screw compressor according to claim 1, characterized in that: A minimum pressure valve (171) is fixedly connected to the oil separator seat (12), and a pressure sensor (17) is fixedly connected to the minimum pressure valve (171).

6. A screw compressor according to claim 1, characterized in that: The compressor oil tank body (1) is provided with a safety valve base (18), and a safety valve (7) is sealed and fixed on the safety valve base (18).

7. A screw compressor according to claim 1, characterized in that: The end cap (11) has a temperature sensor base (111) on it, and a temperature sensor (112) is mounted on the temperature sensor base (111).

8. A screw compressor according to claim 1, characterized in that: The compressor oil tank body (1) is provided with an oil level mirror base (113) on its side, and an oil level mirror (114) is installed on the oil level mirror base (113).

9. A screw compressor according to claim 1, characterized in that: The compressor oil tank body (1) is provided with an oil drain valve base (115) at the rear, and an oil drain valve (116) is installed on the oil drain valve base (115).

10. A screw compressor according to claim 1, characterized in that: The end cap (11) has a temperature sensor base (111) on it, and a temperature sensor (112) is mounted on the temperature sensor base (111).

Images