Oil collecting system of centrifugal compressor

Abstract

The utility model provides an oil collecting system of a centrifugal compressor, which belongs to the technical field of compressors and comprises an air inlet pipe, a volute and a gear box, the tail end of the air inlet pipe is connected with an air inlet of the volute, the rear end of the volute is connected with the gear box, and one end of a rotating shaft in the gear box extends into the volute and is connected with an impeller. The air is compressed through the rotation of the impeller and is discharged from the air outlet of the volute; the volute is provided with an inner cavity pollution discharge hole and / or a carbon ring pollution discharge hole, and the inner cavity pollution discharge hole and / or the carbon ring pollution discharge hole are / is communicated with the oil collector through an oil inlet pipe. The oil collecting system of the centrifugal compressor can discharge oil dirt condensed in the inner cavity of the volute and the carbon ring in time, so that stable operation of the centrifugal compressor is ensured, and shutdown of the centrifugal compressor is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor technical field, concretely relates to a centrifugal compressor oil collecting system. BACKGROUND

[0002] Centrifugal compression as pneumatic machinery is widely used in petrochemical industry, metallurgical industry and other industrial technology fields. Because part centrifugal compressor process gas medium is not pure or produces some impurities in the circulation reaction process, and under certain circumstances these impurities will condense, these liquids similar to oil dirt exist in volute, carbon ring, cause unit to be unable to normally run. SUMMARY

[0003] In order to solve the above technical problem, the present disclosure provides a centrifugal compressor oil collecting system, comprising an inlet pipe, a volute and a gear box, characterized in that the end of the inlet pipe is connected to the gas inlet of the volute, the rear end of the volute is connected to the gear box, the rotating shaft in the gear box extends into the volute and is connected to the impeller, the gas entering the volute is compressed by the rotation of the impeller and discharged from the gas outlet of the volute.

[0004] The volute is provided with an inner cavity drain hole and / or a carbon ring drain hole, and the inner cavity drain hole and / or the carbon ring drain hole are communicated with the oil collector through an oil inlet pipe.

[0005] Further, the inner cavity drain hole is connected to the first oil collector, and the carbon ring drain hole is connected to the second oil collector.

[0006] Further, the first oil collector and the second oil collector are each provided with a liquid level meter.

[0007] The first oil collector and the second oil collector are each provided with a gas discharge pipe at the top.

[0008] The first oil collector and the second oil collector are each provided with an oil discharge pipe at the bottom.

[0009] The first oil collector and the second oil collector are each provided with a plurality of oil filter partitions.

[0010] Further, the oil inlet pipe and the oil discharge pipe are each provided with a valve.

[0011] Further, a carbon ring sealing assembly is provided between the rotating shaft and the volute.

[0012] Further, the rear end of the volute is provided with a mounting hole, the carbon ring sealing assembly comprises a sealing sleeve, the sealing sleeve is fixedly arranged in the mounting hole, a plurality of sealing rings are arranged in the inner hole of the sealing sleeve, and the rotating shaft penetrates the sealing rings.

[0013] Furthermore, the volute is also provided with a carbon ring vent hole, one end of which is connected to the inner hole of the sealing sleeve, and the other end of which is connected to the atmosphere.

[0014] Furthermore, the inner hole of the sealing sleeve is provided with an annular groove, and the sealing sleeve is also provided with a first vent hole and a second vent hole. One end of the first vent hole is connected to the annular groove, and the other end of the first vent hole is connected to the carbon ring vent hole. One end of the second vent hole is connected to the annular groove, and the other end of the second vent hole is connected to the carbon ring drain hole.

[0015] Furthermore, the gas discharge pipe of the first oil collector is connected to the air inlet pipe, allowing the gas inside the first oil collector to re-enter the volute for compression.

[0016] Furthermore, the gas discharge pipe of the second oil collector is connected to the atmosphere.

[0017] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0018] The centrifugal compressor oil collection system is equipped with a first oil collector and a second oil collector to promptly discharge the oil sludge that has condensed in the inner cavity of the volute and the sealing ring, ensuring the stable operation of the centrifugal compressor and preventing the centrifugal compressor from shutting down. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the centrifugal compressor oil collection system of this utility model;

[0021] Figure 2 This is a schematic diagram of the volute structure of this utility model;

[0022] Figure 3 yes Figure 2 A schematic diagram of the structure at point A;

[0023] Figure 4 This is a schematic diagram of the oil collector structure of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Inlet pipe, 2-Vortex casing, 3-Gearbox, 4.1-First oil collector, 4.2-Second oil collector, 5-Shaft, 6-Impeller, 7-Inner cavity drain hole, 8-Oil inlet pipe, 9-Level gauge, 10-Gas discharge pipe, 11-Oil discharge pipe, 12-Oil filter baffle, 13-Sealing sleeve, 14-Sealing ring, 15-Sealing ring, 16-Carbon ring drain hole, 17-Carbon ring vent hole, 18-Ring groove, 19-First exhaust hole, 20-Second exhaust hole. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Please refer to Figures 1-4 The present invention provides a centrifugal compressor oil collection system, including an intake pipe 1, a volute 2, a gearbox 3, and at least one oil collector 4.

[0032] The end of the intake pipe 1 is connected to the air inlet of the volute 2. The rear end of the volute 2 is connected to the gearbox 3. One end of the rotating shaft 5 inside the gearbox 3 extends into the volute 2 and is connected to the impeller 6. The gas entering the volute 2 is compressed by the rotation of the impeller 6 and discharged from the air outlet of the volute 2.

[0033] The volute 2 is provided with an inner cavity drain hole 7 and / or a carbon ring drain hole 16, which are connected to the oil collector through the oil inlet pipe 8.

[0034] Preferably, the inner cavity drain hole 7 is connected to the first oil collector 4.1. The inner cavity drain hole 7 is connected to the first oil collector 4.1 through the oil inlet pipe 8. The first oil collector 4.1 is equipped with a level gauge 9, which can be a magnetic float level gauge. A gas discharge pipe 10 is provided at the top of the first oil collector 4.1, and an oil discharge pipe 11 is provided at the bottom of the first oil collector 4.1. Multiple oil filter baffles 12 are provided inside the first oil collector 4.1. Valves are provided on both the oil inlet pipe 8 and the oil discharge pipe 11.

[0035] Preferably, a carbon ring sealing assembly is provided between the rotating shaft 5 and the volute 2. A mounting hole is provided at the rear end of the volute 2. The carbon ring sealing assembly includes a sealing sleeve 13, which is fixedly disposed within the mounting hole. A sealing ring 15 or other sealing element is provided between the sealing sleeve 13 and the mounting hole. Multiple sealing rings 14 are provided within the inner hole of the sealing sleeve 13, and the rotating shaft 5 passes through the sealing rings 14.

[0036] Preferably, one end of the carbon ring drain hole 16 communicates with the inner hole of the sealing sleeve 13, and the other end of the carbon ring drain hole 16 communicates with the second oil collector 4.2. The carbon ring drain hole 16 is connected to the second oil collector 4.2 through the oil inlet pipe 8. The second oil collector 4.2 is equipped with a level gauge 9, which can be a magnetic float level gauge. A gas discharge pipe 10 is provided at the top of the second oil collector 4.2, and an oil discharge pipe 11 is provided at the bottom of the second oil collector 4.2. Multiple oil filter baffles 12 are provided inside the second oil collector 4.2. Valves are provided on both the oil inlet pipe 8 and the oil discharge pipe 11.

[0037] The volute 2 is also provided with a carbon ring vent hole 17. One end of the carbon ring vent hole 17 is connected to the inner hole of the sealing sleeve 13, and the other end of the carbon ring vent hole 17 is connected to the atmosphere.

[0038] The inner hole of the sealing sleeve 13 has an annular groove 18. The sealing sleeve 13 also has a first vent hole 19 and a second vent hole 20. One end of the first vent hole 19 is connected to the annular groove 18, and the other end of the first vent hole 19 is connected to the carbon ring vent hole 17. One end of the second vent hole 20 is connected to the annular groove 18, and the other end of the second vent hole 20 is connected to the carbon ring drain hole 16.

[0039] Furthermore, the gas discharge pipe 10 of the first oil collector 4.1 is connected to the air inlet pipe 1, so that the gas inside the first oil collector 4.1 can re-enter the volute 2 for compression, thus avoiding waste caused by gas medium leakage.

[0040] Furthermore, the gas discharge pipe 10 of the second oil collector 4.2 is connected to the atmosphere to reduce leakage of gas medium near the compressor. At the same time, it prevents excessive pressure in the gas discharge pipe 10 from causing gas to enter the sealing ring 14 from the second oil collector 4.2, thus preventing the sealing ring 14 from properly draining.

[0041] When the centrifugal compressor is running, the oil condensation inside the volute 2 and at the sealing ring 14 will enter the first oil collector 4.1 and the second oil collector 4.2 through the oil inlet pipe 8. The level gauges 9 on the first oil collector 4.1 and the second oil collector 4.2 will display the oil level in real time. When the level reaches a certain threshold, it will remind you that the oil needs to be drained. At this time, there is no need to stop the machine; you only need to open the valve on the oil drain pipe 11 to drain the oil.

[0042] The centrifugal compressor oil collection system provided by this utility model is equipped with a first oil collector 4.1 and a second oil collector 4.2 to promptly discharge the oil sludge condensed in the inner cavity of the volute 2 and the sealing ring 14, ensuring the stable operation of the centrifugal compressor and preventing the centrifugal compressor from shutting down.

[0043] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A centrifugal compressor oil collection system comprising an intake pipe (1), a volute (2), a gear box (3), characterized in that, The end of the air inlet pipe (1) is connected with the air inlet of the volute (2), the rear end of the volute (2) is connected with the gear box (3), one end of the rotating shaft (5) in the gear box (3) extends into the volute (2) and is connected with the impeller (6), the gas entering the volute (2) is compressed by the rotation of the impeller (6) and is discharged from the air outlet of the volute (2); The volute (2) is provided with an inner cavity blow-off hole (7) and / or a carbon ring blow-off hole (16), the inner cavity blow-off hole (7) and / or the carbon ring blow-off hole (16) are communicated with the oil collector through the oil inlet pipe (8).

2. A centrifugal compressor oil collection system according to claim 1, wherein, The inner cavity blow-off hole (7) is connected with the first oil collector (4.1), and the carbon ring blow-off hole (16) is connected with the second oil collector (4.2).

3. A centrifugal compressor oil collection system according to claim 2, wherein, The first oil collector (4.1) and the second oil collector (4.2) are both provided with a liquid level meter (9). The first oil collector (4.1) and the second oil collector (4.2) are both provided with a gas discharge pipe (10) at the top. The first oil collector (4.1) and the second oil collector (4.2) are both provided with an oil discharge pipe (11) at the bottom. The first oil collector (4.1) and the second oil collector (4.2) are both provided with a plurality of oil filter partitions (12).

4. A centrifugal compressor oil collection system according to claim 3, wherein, The oil inlet pipe (8) and the oil discharge pipe (11) are both provided with a valve.

5. A centrifugal compressor oil collection system as recited in claim 1, wherein, A carbon ring sealing assembly is arranged between the rotating shaft (5) and the volute (2).

6. A centrifugal compressor oil collection system as claimed in claim 5, wherein, The rear end of the volute (2) is provided with a mounting hole, the carbon ring sealing assembly comprises a sealing sleeve (13), the sealing sleeve (13) is fixedly arranged in the mounting hole, a plurality of sealing rings (14) are arranged in the inner hole of the sealing sleeve (13), and the rotating shaft (5) penetrates through the sealing rings (14).

7. A centrifugal compressor oil collection system as claimed in claim 6, wherein, The volute (2) is also provided with a carbon ring vent hole (17), one end of the carbon ring vent hole (17) is communicated with the inner hole of the sealing sleeve (13), and the other end of the carbon ring vent hole (17) is communicated with the atmosphere.

8. A centrifugal compressor oil collection system according to claim 7, wherein, The inner hole of the sealing sleeve (13) is provided with a ring groove (18), and the sealing sleeve (13) is also provided with a first exhaust hole (19) and a second exhaust hole (20); one end of the first exhaust hole (19) is communicated with the ring groove (18), and the other end of the first exhaust hole (19) is communicated with the carbon ring vent hole (17); one end of the second exhaust hole (20) is communicated with the ring groove (18), and the other end of the second exhaust hole (20) is communicated with the carbon ring blow-off hole (16).

9. A centrifugal compressor oil collection system as claimed in claim 3, wherein, The gas discharge pipe (10) of the first oil collector (4.1) is communicated with the air inlet pipe (1), so that the gas in the first oil collector (4.1) can re-enter the volute (2) for compression.

10. A centrifugal compressor oil collection system as claimed in claim 3, wherein, The gas discharge pipe (10) of the second oil collector (4.2) is communicated with the atmosphere.

Images