Sealing assembly for industrial gas compressor

Abstract

The utility model relates to the technical field of compressor sealing, in particular to a sealing assembly for an industrial gas compressor, which comprises a compression cylinder and a sealing assembly, a sealing assembly is mounted outside the extending side of the main shaft; the sealing assembly comprises a rotating cylinder, a sealing ring and an automatic valve; a sealing ring is arranged in the rotating cylinder; a gas storage layer is arranged between the rotating cylinder and the sealing ring; an exhaust channel is arranged in the cylinder wall of the rotating cylinder; the exhaust channel comprises an exhaust port, a buffer channel and a connecting cavity; the connecting cavity is communicated with the gas storage layer; an automatic valve and an annular positioning block are arranged in the connecting cavity; the annular positioning block is fixedly arranged on the inner wall of the connecting cavity; the automatic valve is slidably mounted in the middle of the annular positioning block; the automatic valve comprises a valve core and a restoring spring; a fixing ring is arranged at the end of the valve element. According to the device, the situation that the main shaft is overheated due to pressure building caused by dead air can be avoided, and therefore the sealing effect of the compressor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to compressor sealing technical field especially a sealing assembly for industrial gas compressor. BACKGROUND

[0002] The compressor is the equipment that gas or steam is compressed into high pressure state. If the compressor itself has no sealing property, will cause the gas or steam in the compression process to leak, thereby making the compressor lose compression capacity, influence compressed air or gas output effect, cause energy waste and economic benefit decline, in order to prevent the compressed medium from leaking to the atmosphere and polluting the environment, the sealing in the structural design of centrifugal compressor plays an important role. The normal exhaust pressure reaches 12.6MPa in the operation of the compressor, and the high pressure and high temperature gas leaks along the main shaft when the impeller rotates, which causes the dead gas between the sealing ring and the sealing element, resulting in pressure retention, causing the sealing element to wear too fast and the piston rod to overheat, and unable to ensure the safe and stable long-period operation of the equipment. SUMMARY

[0003] The purpose of the present application is to provide a sealing assembly for industrial gas compressor, aiming at solving the problems in the prior art.

[0004] The sealing assembly for industrial gas compressor provided by the embodiment of the present application comprises a compression cylinder and a sealing assembly, the compression cylinder is internally provided with an impeller and a main shaft, one end of the compression cylinder away from the impeller is a connecting end, the main shaft extends from the connecting end of the compression cylinder, the sealing assembly is externally mounted on the extending side of the main shaft, the sealing assembly comprises a rotating cylinder, a sealing ring and an automatic valve, the rotating cylinder is internally provided with the sealing ring, there is a gas storage layer between the rotating cylinder and the sealing ring, the cylinder wall of the rotating cylinder is internally provided with an exhaust passage, the exhaust passage comprises an exhaust port, a buffer passage and a connecting cavity, the connecting cavity is in communication with the gas storage layer, the connecting cavity is internally provided with the automatic valve and an annular positioning block, the annular positioning block is fixedly arranged on the inner wall of the connecting cavity, the automatic valve is slidingly installed in the middle of the annular positioning block, the automatic valve comprises a valve core and a restoring spring, the valve core can slide in the connecting cavity, the valve core is provided with a fixing ring at the end portion, and the restoring spring is installed outside the valve core and located between the fixing ring and the positioning block.

[0005] Further, the impeller is arranged on the outer side of the main shaft and fixedly connected with the main shaft, and a packing cavity is arranged between the inner wall of the compression cylinder and the extending end of the main shaft.

[0006] Further, a threaded connection groove is arranged on the cylinder wall of the compression cylinder at the connecting end, the end portion of the rotating cylinder is provided with a connecting end head, and the outer surface of the connecting end head is externally provided with an external thread.

[0007] Further, the outer surface of the sealing ring is provided with a connecting thread, and the sealing ring is fixedly installed in the rotating cylinder through the connecting thread.

[0008] Further, the buffer channel is arranged in the main shaft direction in the rotating cylinder wall; the exhaust port is arranged on the rotating cylinder outer wall; and the buffer channel is connected with the connecting cavity and the exhaust port at two ends respectively.

[0009] The utility model discloses the beneficial effect is: the utility model discloses through the setting of switch valve makes the dead gas in gas storage layer can automatically discharge and through the collection pipe drainage and recycle in official website, avoid the dead gas caused by the pressure and cause the main shaft overheating, thereby ensure the safe and stable of compression cylinder, improve the sealing effect of centrifugal compressor. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 It is the overall structural drawing of the utility model.

[0011] Fig. 2 It is the sealed assembly structure schematic view.

[0012] Fig. 3 It is the automatic valve and connecting cavity structure schematic view.

[0013] In the drawing:

[0014] 1, compression cylinder;11, threaded connection groove;2, rotating cylinder;21, connecting end head;210, external thread;3, sealing ring;4, main shaft;5, impeller;6, packing cavity;7, exhaust passage;71, connecting cavity;72, buffer channel;73, exhaust port;8, automatic valve;81, fixed ring;82, valve core;83, recovery spring;9, annular positioning block;10, gas storage layer. DETAILED DESCRIPTION

[0015] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0016] As Figs. 1 to 3The sealing assembly for industrial gas compressor shown in the application comprises a compression cylinder 1 and a sealing assembly; the compression cylinder 1 is internally provided with an impeller 5 and a main shaft 4; the end of the compression cylinder 1 away from the impeller 5 is a connecting end; the main shaft 4 extends from the connecting end of the compression cylinder; the sealing assembly is externally mounted on the extending side of the main shaft 4; the sealing assembly comprises a rotating cylinder 2, a sealing ring 3 and an automatic valve 8; the rotating cylinder 2 is internally provided with the sealing ring 3; there is a gas storage layer 10 between the rotating cylinder 2 and the sealing ring 3; the cylinder wall of the rotating cylinder 2 is internally provided with an exhaust passage 7; the exhaust passage 7 comprises an exhaust port 73, a buffer passage 72 and a connecting cavity 71; the connecting cavity 71 is in communication with the gas storage layer 10; the connecting cavity 71 is internally provided with the automatic valve 8 and an annular positioning block 9; the annular positioning block 9 is fixedly arranged on the inner wall of the connecting cavity 71; the automatic valve 8 is slidingly mounted in the middle of the annular positioning block 9; the automatic valve 8 comprises a valve core 82 and a restoring spring 83; the valve core 82 can slide in the connecting cavity 71; the valve core 82 is provided with a fixing ring 81 at the end; the restoring spring 83 is mounted outside the valve core 82; the restoring spring 83 is located between the fixing ring 81 and the positioning block 9; when high-temperature and high-pressure gas in the compression cylinder 1 leaks along the main shaft 4, the leaked gas is gradually pressed in the gas storage layer 10, so that the gas pressure in the gas storage layer 10 is increased, the valve core 82 is pushed into the connecting cavity 71, the high-pressure gas in the gas storage layer 10 is finally exhausted from the exhaust port 73 along the connecting cavity 71 and the buffer passage 72, the exhaust port 73 can be connected with an external collecting pipe, so that the dead gas in the gas storage layer 10 is exhausted and drained back to the official website through the collecting pipe for recycling, the compression cylinder is ensured to be safe and stable, and the sealing effect of the centrifugal compressor is improved.

[0017] When the dead gas in the gas storage layer 10 is exhausted, the gas pressure in the gas storage layer 10 is restored, at this time, the valve core 82 is repositioned to the original position under the action of the restoring spring 83, the automatic valve 8 is closed, and the communication between the connecting cavity 71 and the gas storage layer 10 is cut off.

[0018] The impeller 5 is arranged outside the main shaft 4 and fixedly connected with the main shaft 4; a packing cavity 6 is arranged between the inner wall of the compression cylinder 1 and the extending end of the main shaft 4, and the packing cavity 6 functions to prevent high-pressure gas in the compression cylinder 1 from leaking along the main shaft 4, and the packing is mostly oil-free lubrication.

[0019] The compression cylinder wall of the connecting end is provided with a threaded connection groove 11; the end of the rotating cylinder is provided with a connecting end head 21; the outside of the connecting end head 21 is provided with an external thread 210; the connecting end head 210 is rotatably inserted into the threaded connection groove 11, so that the sealing assembly is mounted on the compression cylinder 1, and the flange fixing is more convenient.

[0020] The outer surface of the sealing ring 3 is provided with a connecting thread; the sealing ring 3 is fixedly mounted in the rotating cylinder 2 through the connecting thread.

[0021] The buffer channel 72 is arranged in the direction of the main shaft 4 in the wall of the rotating cylinder 2, and the exhaust port 73 is arranged on the outer wall of the rotating cylinder 2; the two ends of the buffer channel 72 are respectively connected with the connecting cavity 71 and the exhaust port 73, and the buffer channel 72 is used for reducing the temperature and pressure of the high-pressure gas.

[0022] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A sealing assembly for an industrial gas compressor, characterized in that, The device includes a compression cylinder and a sealing assembly. The compression cylinder contains an impeller and a main shaft. The end of the compression cylinder furthest from the impeller is a connecting end. The main shaft extends from the connecting end of the compression cylinder. A sealing assembly is installed on the outside of the extended side of the main shaft. The sealing assembly includes a rotating cylinder, a sealing ring, and an automatic valve. The rotating cylinder contains the sealing ring. An air storage layer exists between the rotating cylinder and the sealing ring. An exhaust channel is provided within the cylinder wall of the rotating cylinder. The exhaust channel includes an exhaust port, a buffer channel, and a connecting cavity. The connecting cavity communicates with the air storage layer. An automatic valve and an annular positioning block are provided within the connecting cavity. The annular positioning block is fixedly mounted on the inner wall of the connecting cavity. The automatic valve is slidably mounted in the middle of the annular positioning block. The automatic valve includes a valve core and a return spring. The valve core can slide within the connecting cavity. A fixing ring is provided at the end of the valve core. The return spring is mounted outside the valve core and is located between the fixing ring and the positioning block.

2. The sealing assembly for an industrial gas compressor according to claim 1, characterized in that, The impeller is located outside the main shaft and is fixedly connected to the main shaft; a packing cavity is provided between the inner wall of the compression cylinder and the protruding end of the main shaft.

3. The sealing assembly for an industrial gas compressor according to claim 1, characterized in that, The compression cylinder wall at the connecting end is provided with a threaded connection groove; the rotating cylinder end is provided with a connecting end; the connecting end is provided with an external thread.

4. The sealing assembly for an industrial gas compressor according to claim 1, characterized in that, The outer surface of the sealing ring is provided with connecting threads; the sealing ring is fixedly installed inside the rotating cylinder through the connecting threads.

5. The sealing assembly for an industrial gas compressor according to claim 1, characterized in that, The buffer channel is located inside the rotating cylinder wall along the main axis; the exhaust port is located on the outer wall of the rotating cylinder; the two ends of the buffer channel are respectively connected to the connecting cavity and the exhaust port.

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