Totally-enclosed direct-driven compressor

Abstract

The utility model relates to the technical field of gas compressors, in particular to a totally-enclosed direct-driven compressor, which comprises a motor shell combination and a compression component, an impeller is fixed on a high-speed shaft to form a high-speed rotor, a stator is mounted on the motor shell combination and forms an electromagnetic loop with a permanent magnet on the high-speed rotor to drive the high-speed rotor to rotate, and the compression component is mounted on the motor shell combination. The impeller is driven to act on the gas; the device is few in parts and simple and compact in structure; rotary sealing in a traditional compressor is omitted, the reliability is extremely high, and no failure risk exists; the whole machine is reliable in sealing, no mechanical sealing or dry gas sealing or other sealing systems which are high in price and complex in control are needed, and the cost can be greatly reduced; the working medium is completely sealed in the sealing cavity, so that leakage can be completely avoided; therefore, the fully-closed high-speed motor direct-driven centrifugal compressor is simple in structure, low in cost and capable of achieving absolute zero leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of gas compressors, in particular to a fully enclosed direct drive compressor. Background Art

[0002] Centrifugal compressors are widely used in various industries, including important industries such as aviation, shipbuilding, nuclear energy, petrochemical, power, sewage treatment, pharmaceuticals, and food, for gas transportation, microbial oxygen supply, or as a gas source; with the gradual improvement of people's environmental awareness and safety awareness in various industries, the requirements for the equipment used, especially for rotating equipment such as centrifugal compressors, are getting higher and higher.

[0003] Existing centrifugal compressors isolate the working medium from the atmosphere through shaft seals of types such as labyrinth seals, mechanical seals, and dry gas seals. However, labyrinth seals belong to clearance seals and cannot avoid the leakage of the working medium to the outside. Mechanical seals and dry gas seals can control the leakage amount to an extremely small level and lead the leaked gas to a suitable position for treatment, but still cannot achieve absolute leakage-free. Moreover, both mechanical seals and dry gas seals require a complete set of complex control systems during operation and need external high-pressure oil or external pure isolation gas supply; more critically, the prices of mechanical seals and dry gas seals are too high, resulting in high costs. Summary of the Invention

[0004] The purpose of the utility model is to provide a fully enclosed direct drive compressor, aiming to provide a fully enclosed high-speed motor direct drive centrifugal compressor with a simple structure, low cost, and capable of achieving absolute zero leakage.

[0005] To achieve the above purpose, the utility model provides a fully enclosed direct drive compressor, which includes a motor housing assembly and a compression assembly. The compression assembly includes a high-speed shaft, a stator, a housing, an impeller, and a support member. The support member is rotationally connected to the motor housing assembly and is located in the motor housing assembly; the high-speed shaft is rotationally connected to the support member and penetrates through the rotating member; the stator is fixedly connected to the motor housing assembly and is located in the motor housing assembly; the housing is rotationally connected to the high-speed shaft and is fixedly connected to the motor housing assembly; the impeller is fixedly connected to the high-speed shaft and is located on one side of the high-speed shaft.

[0006] Among them, the support member includes a front support bearing and a rear support bearing. The front support bearing is rotationally connected to the motor housing assembly and is located in the motor housing assembly; the rear support bearing is rotationally connected to the motor housing assembly and is located in the motor housing assembly.

[0007] Among them, the compression assembly further includes a sealing end cover, and the sealing end cover is installed on one side of the motor housing assembly.

[0008] Among them, the compression component further includes a compressor housing, which is fixedly connected to the motor housing assembly and is located on one side of the motor housing assembly.

[0009] Among them, the compression component further includes a first sealing ring, a second sealing ring and a third sealing ring. The first sealing ring is located between the sealing end cover and the motor housing assembly; the second sealing ring is located between the compressor housing and the motor housing assembly; the third sealing ring is located inside the compressor housing.

[0010] A fully enclosed direct-drive compressor of the present invention includes a motor housing assembly and a compression component. The compression component includes a high-speed shaft, a stator, a housing, an impeller and a support member. The support member is rotatably connected to the motor housing assembly and is located in the motor housing assembly; the high-speed shaft is rotatably connected to the support member and penetrates through the rotating member; the stator is fixedly connected to the motor housing assembly and is located in the motor housing assembly; the housing is rotatably connected to the high-speed shaft and is fixedly connected to the motor housing assembly; the impeller is fixedly connected to the high-speed shaft and is located on one side of the high-speed shaft; the impeller is fixed on the high-speed shaft to form a high-speed rotor. The stator is installed on the motor housing assembly to form an electromagnetic circuit with the permanent magnet on the high-speed rotor, driving the high-speed rotor to rotate and driving the impeller to do work on the gas. This device has few components, is simple and compact in structure; the rotating seal in the traditional compressor is cancelled, with extremely high reliability and no risk of failure; the whole machine is reliably sealed, without expensive and complex control sealing systems such as mechanical seals or dry gas seals, which can greatly reduce costs; and the working medium is completely sealed in the sealed cavity, achieving completely leak-free. Thus, a fully enclosed high-speed motor direct-drive centrifugal compressor with a simple structure, low cost and absolute zero leakage is provided. Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0012] Figure 1 It is a cross-sectional view of a fully enclosed direct-drive compressor according to the first embodiment of the present invention.

[0013] 1 - Sealing end cover, 2 - Rear support bearing, 3 - Motor housing assembly, 4 - Stator, 5 - High-speed shaft, 6 - Front support bearing, 7 - Compressor housing, 8 - Impeller, 9 - Housing, 10 - Support member, 11 - First sealing ring, 12 - Second sealing ring, 13 - Third sealing ring. Detailed Embodiments

[0014] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0015] Please refer to Figure 1 ~Figure, Figure 1 Yes.

[0016] The present utility model provides a fully enclosed direct-drive compressor, which includes a motor housing assembly 3 and a compression assembly. The compression assembly includes a high-speed shaft 5, a stator 4, a housing 9, an impeller 8, a support member 10, a sealing end cover 1, a compressor housing 7, a first sealing ring, a second sealing ring, and a third sealing ring. The support member 10 includes a front support bearing 6 and a rear support bearing 2. Through the foregoing solution, a fully enclosed high-speed motor direct-drive centrifugal compressor with a simple structure, low cost, and capable of achieving absolute zero leakage is provided.

[0017] In this embodiment, the motor housing assembly 3 is an integral outer shell that provides a supporting function.

[0018] Among them, the support member 10 is rotationally connected to the motor housing assembly 3 and is located in the motor housing assembly 3. The high-speed shaft 5 is rotationally connected to the support member 10 and penetrates through the rotating member. The stator 4 is fixedly connected to the motor housing assembly 3 and is located in the motor housing assembly 3. The housing 9 is rotationally connected to the high-speed shaft 5 and is fixedly connected to the motor housing assembly 3. The impeller 8 is fixedly connected to the high-speed shaft 5 and is located on one side of the high-speed shaft 5. The impeller 8 is fixed on the high-speed shaft 5 to form a high-speed rotor. The stator 4 is installed on the motor housing assembly 3 to form an electromagnetic circuit with the permanent magnet on the high-speed rotor, driving the high-speed rotor to rotate and driving the impeller 8 to do work on the gas. This device has few components, a simple and compact structure, cancels the rotating seal in the traditional compressor, has extremely high reliability and no failure risk, the whole machine has reliable sealing, does not require expensive and complex sealing systems such as mechanical seals or dry gas seals, can greatly reduce costs, and the working medium is completely sealed in the sealed cavity, and can achieve complete zero leakage. Thus, a fully enclosed high-speed motor direct-drive centrifugal compressor with a simple structure, low cost, and capable of achieving absolute zero leakage is provided.

[0019] Secondly, the front support bearing 6 is rotatably connected to the motor housing assembly 3 and is located within the motor housing assembly 3; the rear support bearing 2 is rotatably connected to the motor housing assembly 3 and is located within the motor housing assembly 3; the rear support bearing 2 and the front support bearing 6 are mounted on the motor housing assembly 3 for supporting the high-speed rotor composed of the high-speed shaft 5 and the impeller 8.

[0020] Thirdly, the sealing end cover 1 is mounted on one side of the motor housing assembly 3; the sealing end cover 1 is mounted at the rear end of the motor housing assembly 3 to form a sealed area, and this structure does not require a shaft seal or other forms of rotary seal.

[0021] Then, the compressor housing 7 is fixedly connected to the motor housing assembly 3 and is located on one side of the motor housing assembly 3; the compressor housing 7 is mounted on the motor housing assembly 3 for supporting and enclosing the impeller 8.

[0022] Finally, the first sealing ring is located between the sealing end cover 1 and the motor housing assembly 3; the second sealing ring is located between the compressor housing 7 and the motor housing assembly 3; the third sealing ring is located inside the compressor housing 7; this device does not require a shaft seal or other forms of rotary seal, and there are only three static sealing points, namely the first sealing ring at the connection surface between the sealing end cover 1 and the motor housing assembly 3, the second sealing ring at the connection surface between the compressor housing 7 and the motor housing assembly 3, the third sealing ring inside the compressor, and there is a static seal before the motor junction box surface. And the static seals at these positions can achieve reliable complete zero leakage at a relatively low cost only by using sealing rings.

[0023] When using the fully enclosed direct drive compressor of the present utility model, the motor housing assembly 3 is an integral outer shell that provides a supporting function; the impeller 8 is fixed on the high-speed shaft 5 to form a high-speed rotor, and the rear support bearing 2 and the front support bearing 6 are installed on the motor housing assembly 3 to support the high-speed rotor composed of the high-speed shaft 5 and the impeller 8; the stator 4 is installed on the motor housing assembly 3 to form an electromagnetic circuit with the permanent magnet on the high-speed rotor, driving the high-speed rotor to rotate and driving the impeller 8 to do work on the gas; the sealing end cover 1 is installed at the rear end of the motor housing assembly 3 to form a sealed area. This device does not require shaft seals or other forms of rotary seals, and there are only three static seal points, namely the first sealing ring at the connection surface between the sealing end cover 1 and the motor housing assembly 3, the second sealing ring at the connection surface between the compressor housing 7 and the motor housing assembly 3, the third sealing ring inside the compressor, and there is a static seal in front of the motor terminal box surface. And the static seals at these positions only need to use sealing rings to achieve reliable and completely zero leakage at a relatively low cost; the compressor housing 7 is installed on the motor housing assembly 3 to support and enclose the impeller 8; this device has few components, and the structure is simple and compact; the rotary seal in the traditional compressor is cancelled, with extremely high reliability and no risk of failure; the whole machine is reliably sealed, without the need for expensive and complex control sealing systems such as mechanical seals or dry gas seals, which can greatly reduce costs; and the working medium is completely sealed in the sealed cavity, and completely zero leakage can be achieved; thus providing a fully enclosed high-speed motor direct drive centrifugal compressor with a simple structure, low cost and absolute zero leakage.

[0024] The above disclosure is only a preferred embodiment of the present utility model. Of course, it cannot be used to limit the scope of rights of the present utility model. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present utility model still fall within the scope covered by the utility model.

Claims

1. A fully enclosed direct drive compressor, comprising a motor housing assembly, characterized in that, it further comprises a compression assembly, the compression assembly includes a high-speed shaft, a stator, a housing, an impeller and a support member, the support member is rotationally connected to the motor housing assembly and is located in the motor housing assembly; the high-speed shaft is rotationally connected to the support member and penetrates through the rotating member; the stator is fixedly connected to the motor housing assembly and is located in the motor housing assembly; the housing is rotationally connected to the high-speed shaft and is fixedly connected to the motor housing assembly; the impeller is fixedly connected to the high-speed shaft and is located on one side of the high-speed shaft.

2. The fully enclosed direct drive compressor according to claim 1, characterized in that, the support member includes a front support bearing and a rear support bearing, the front support bearing is rotationally connected to the motor housing assembly and is located in the motor housing assembly; the rear support bearing is rotationally connected to the motor housing assembly and is located in the motor housing assembly.

3. The fully enclosed direct drive compressor according to claim 2, characterized in that, the compression assembly further includes a sealing end cover, and the sealing end cover is installed on one side of the motor housing assembly.

4. The fully enclosed direct drive compressor according to claim 3, characterized in that, the compression assembly further includes a compressor housing, and the compressor housing is fixedly connected to the motor housing assembly and is located on one side of the motor housing assembly.

5. The fully enclosed direct drive compressor according to claim 4, characterized in that, the compression assembly further includes a first sealing ring, a second sealing ring and a third sealing ring, the first sealing ring is located between the sealing end cover and the motor housing assembly; the second sealing ring is located between the compressor housing and the motor housing assembly; the third sealing ring is located inside the compressor housing.

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