CN210715169U - Integrated compressor unit - Google Patents

Abstract

The utility model discloses a medium gas directly cools high-speed motor and directly links integrated form compressor unit relates to centrifugal compressor technical field, has solved the motor that exists among the prior art and the centrifugal compressor unit auxiliary system that the compressor components of a whole that can function independently arranged complicated, the energy consumption is high, overhaul the maintenance is complicated, start the technical problem that the preparation time is long. The integrated compressor unit comprises a base frame, a pressure-bearing shell arranged on the base frame, a compressor rotor and a motor rotor which are integrally packaged in the pressure-bearing shell, wherein the compressor rotor and the motor rotor are coaxially arranged. The utility model discloses an integrated form compressor unit supports through adopting magnetic bearing, and the rotor of compressor and motor is coaxial to be arranged, wholly encapsulates in the pressure-bearing casing to realize that the unit need not the design of auxiliary system such as lubricating oil system, no axle head dynamic seal system, no extra motor cooling system, and reduce system's energy consumption, reduce system's complexity with this, improve the holistic reliability of unit.

Description

Integrated compressor unit

Technical Field

The utility model belongs to the technical field of the centrifugal compressor technique and specifically relates to a medium gas directly cools high-speed motor and directly links integrated form compressor unit is related to.

Background

Centrifugal compressor trains are well known in the industry and play a vital role in industrial settings. The impeller rotates to do work on the gas, so that the pressure of the gas is increased, and the requirements of the process flow are met.

For the centrifugal compressor unit, the driving machine can usually use an electric motor, a steam turbine, a gas turbine, etc., and a split arrangement is adopted, i.e. the driving machine and the compressor are independent and connected through a shaft coupling at the shaft extending end. According to the arrangement structure, dynamic seals are required to be added at two shaft ends of the compressor, particularly for a high-pressure real gas centrifugal compressor, in order to ensure reliable sealing of media, a complex shaft end sealing system is required to be added, and a dry gas sealing system is generally adopted at present to ensure normal operation of a compressor unit.

For a traditional electrically-driven split type real gas centrifugal compressor unit, except for a motor and a compressor, auxiliary systems such as a lubricating oil system, a shaft end dry gas sealing system, a motor cooling system and the like are generally required to be equipped, and the systems generate energy consumption, increase the complexity of the system and influence the overall reliability of the unit.

Therefore, the above technical problem is to be solved in the present invention.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a medium gas directly cools high-speed motor directly links integrated form compressor unit to solve the motor that exists among the prior art and the centrifugal compressor unit auxiliary system that the compressor components of a whole that can function independently arranged complicated, the energy consumption is high, overhaul and maintain complicacy, open the technical problem that the preparation time is long.

The following explains various technical effects that can be produced by the preferred technical scheme in the technical schemes of the utility model. In order to achieve the above purpose, the utility model provides a following technical scheme:

the embodiment of the utility model provides an integrated compressor unit, which comprises a base frame, a pressure-bearing shell arranged on the base frame, and a compressor rotor and a motor rotor which are integrally encapsulated in the pressure-bearing shell, wherein,

the compressor rotor with motor rotor coaxial arrangement, be provided with two at least impellers on the rotor, every the impeller is as a compression stage, the compression stage adopts the row formula to arrange that to penetrate in proper order from the one end of main shaft, works as when the compression stage exceedes six, adopts back-to-back to arrange that to penetrate in proper order respectively from the both ends of main shaft, and each end is along penetrating the direction at different levels the centre bore of impeller and the radial dimension of corresponding main shaft increase gradually in proper order.

As a further improvement of the utility model, a plurality of be provided with the interstage seal between the compression stage, the interstage seal is labyrinth seal.

As a further improvement of the utility model, a balance piston is arranged behind the last compression stage.

As a further improvement of the present invention, each of the impellers of the compression stages is a three-dimensional flow impeller.

As a further improvement of the present invention, the integrated compressor unit is supported by a magnetic bearing.

As a further improvement, the pressure-bearing casing on one side of the compressor is provided with an air inlet duct and an air exhaust duct.

As a further improvement, the mouth of pipe has been seted up to the inlet end of pressure-bearing casing, be connected with the pipeline on the mouth of pipe, the pipeline is used for the first order medium gas after the impeller compression is introduced the pressure-bearing casing internal cooling of motor one side the motor.

As a further improvement of the utility model, the pipeline is provided with an air-vent valve.

As a further improvement, the pressure-bearing casing middle part is provided with the manhole door, pressure-bearing casing upper portion is provided with electric penetration piece.

As a further improvement, the pressure-bearing casing is forged by alloy steel, and the rotor is formed by integral milling.

Based on the technical scheme, the embodiment of the utility model provides a can produce following technological effect at least:

the utility model discloses a medium gas directly cools high-speed motor directly links integrated form compressor unit supports through adopting magnetic bearing, and the rotor of compressor and motor is coaxial to be arranged, wholly encapsulates in the pressure-bearing casing to realize that the unit need not lubricating oil system, no axle end dynamic seal system, do not have the design of auxiliary system such as extra motor cooling system, and reduce system energy consumption, reduce system complexity with this, improve the holistic reliability of unit.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an integrated compressor unit provided by the present invention;

fig. 2 is a schematic diagram of a compressor core package structure provided by the present invention.

In the figure, 1, a pressure-bearing shell; 2. a base frame; 3. an air inlet duct; 4. a compressor; 5. a motor; 6. an electrical penetration; 7. a pressure regulating valve; 8. a pipeline; 9. a compressor core package; 10. and a roller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model provides a medium gas directly cools high-speed motor and directly links integrated form compressor unit. The technical solution provided by the present invention is explained in more detail with reference to fig. 1 to 2.

As shown in fig. 1-2, an integrated compressor unit provided in an embodiment of the present invention includes a base frame 2, a pressure-bearing casing 1 disposed on the base frame 2, and a compressor 4 rotor and a motor 5 rotor integrally encapsulated in the pressure-bearing casing 1;

the rotors of the compressors 4 and the rotors of the motors 5 are coaxially arranged, at least two impellers are arranged on the rotors, each impeller is used as a compression stage, the compression stages are sequentially penetrated from one end of the main shaft in a row arrangement mode, when the compression stages exceed six stages, the compression stages are sequentially penetrated from two ends of the main shaft in a back-to-back arrangement mode, and each end sequentially increases the size of a central hole of each stage of impeller and the radial size of the corresponding main shaft in the penetrating direction.

The utility model discloses a medium gas directly cools high-speed motor directly links integrated form compressor unit supports through adopting magnetic bearing, and compressor 4 and motor 5's rotor is coaxial to be arranged, wholly encapsulates in pressure-bearing casing 1 to realize that the unit need not the design of auxiliary system such as lubricating oil system, shaftless end dynamic seal system, no extra motor cooling system, and with this reduce system energy consumption, reduce system complexity, improve the holistic reliability of unit.

As a preferred or alternative embodiment, interstage seals are provided between the plurality of compression stages, the interstage seals being labyrinth seals.

In order to keep internal leakage, which is provided between each compression stage of the rotor in this embodiment, due to the pressure rise, and which is provided with internal leakage, an interstage seal, which is typically a labyrinth seal, is used to reduce the clearance over the compression stages.

In a preferred or alternative embodiment, a balancing piston is arranged after the last compression stage and a balancing piston is arranged after the last compression stage of the multi-stage rotor. The balance piston serves to reduce the inter-stage pressure differential of the gas and helps balance this thrust, allowing the incorporation of smaller axial bearings, and a back-to-back impeller arrangement to counteract some of the axial forces if the compression stage exceeds six stages.

In a preferred or alternative embodiment, the impeller of each compression stage is a three-stream impeller. The pressure-bearing shell 1 is provided with a plurality of stages of rotors, the multi-stage rotors are provided with at least two compression stages, and each compression stage compresses gas, so that more compression stages can be arranged according to different applications. The impeller of each compression stage is preferably a three-stream impeller.

In a preferred or alternative embodiment, the integrated compressor package is supported using a combined magnetic bearing.

The embodiment of the utility model provides a set up initiative magnetic force axial-journal bearing at the both ends of multistage rotor, must set up the axial bearing span at the scope as little as possible to realize the installation and the dismantlement of thrust disc through the mode that hydraulic pressure was installed and removed. Due to rotor dynamics, the bearing pitch must be very small, whereby a compact combined magnetic bearing is used instead of a separate radial bearing and a separate axial bearing.

In a preferred or alternative embodiment, a horizontal air inlet duct 3 and a horizontal air outlet duct are arranged on the pressure-bearing shell 1 on one side of the compressor 4.

The utility model discloses a compressor includes common bed frame 2, has arranged on this common bed frame 2 to lay in same pressure-bearing casing 1 by magnetic bearing control system, medium cooling gas filtration system, compressor 4 and 5 coaxial arrangements of motor.

Wherein, this pressure-bearing casing 1's radial connection has horizontal air intake dryer 3 to be connected with horizontal exhaust dryer at the other end, of course, according to the demand of flow technology, diversified change can be carried out in the position of dryer.

As a preferable or optional implementation manner, a pipe orifice is formed at an air inlet end of the pressure-bearing casing 1, a pipeline 8 is connected to the pipe orifice, and the pipeline 8 is used for introducing the medium gas compressed by the first-stage impeller into the pressure-bearing casing 1 on one side of the motor 5 to cool the motor 5.

According to the requirement of the cleanness degree of the medium, the pipeline 8 can introduce gas into the filter for filtration and then regulate the pressure of the gas by the pressure regulating valve 7 to enter the motor 5.

The air inlet end of the pressure-bearing shell 1 is provided with a pipe orifice for introducing the medium air compressed by the first-stage impeller into the shell at the side of the motor 5 to cool the motor 5, and the side opening of the motor of the pressure-bearing shell 1 is used for collecting the medium air cooled by the motor and sending the collected medium air back to the air inlet pipeline of the compressor 4 by utilizing backflow.

In a preferred or alternative embodiment, the conduit 8 is provided with a pressure regulating valve 7. The pressure regulating valve 7 for regulating the pressure of the cooler is arranged in the cooling air system, so that the flow of cooling air of the motor 5 can be regulated, the temperature rise of the motor 5 is ensured not to exceed an allowable value, and the consumption of the cooling air is reduced, thereby improving the efficiency of the whole machine.

In a preferable or alternative embodiment, a manhole door is arranged in the middle of the pressure-bearing machine shell 1, and an electric penetrating piece 6 is arranged at the upper part of the pressure-bearing machine shell 1.

The pressure-bearing machine shell 1 is provided with a manhole door for disassembling the rotors of the compressor 4 and the motor 5. Here, the pressure-bearing housing 1 is provided with an electrical penetration member 6 for penetrating a power cable of the motor 5 and a signal cable of the unit, and a control cable and the like of the magnetic bearing out of the pressure-bearing housing 1, and ensuring that high-pressure gas does not leak to the outside.

In a preferred or alternative embodiment, the pressure-bearing housing 1 is forged from alloy steel, and the rotor is milled in one piece. The multistage rotor is integrally milled, a smoother flow wall surface is realized, flow loss is reduced, flow characteristics are improved, and the efficiency of the compressor is improved.

The utility model discloses a 9 bottoms of motor core package and compressor core package are equipped with gyro wheel 10 to the core package can be taken out respectively from pressure-bearing casing both sides, realizes convenient maintenance and maintenance. The compressor unit, the magnetic bearing control system, the cooler filtering system and the like are integrally installed in a prying mode, and convenient installation and transportation are achieved.

Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.

Also, above-mentioned the utility model discloses if disclose or related to mutually fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connection (such as riveting and welding), of course, the mutual fixed connection can also be an integral structure (for example, the mutual fixed connection is manufactured by casting and integral forming instead (except that the integral forming process can not be adopted obviously).

In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated. The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (10)

1. An integrated compressor unit, comprising: comprises a base frame (2), a pressure-bearing casing (1) arranged on the base frame (2), and a compressor (4) rotor and a motor (5) rotor which are integrally encapsulated in the pressure-bearing casing (1), wherein,

the compressor (4) rotor with motor (5) rotor coaxial arrangement, be provided with two at least impellers on the rotor, every the impeller is as a compression stage, the compression stage adopts the row formula to arrange that the one end from the main shaft penetrates in proper order, works as when the compression stage exceedes six, adopts back to arrange that the both ends from the main shaft penetrate in proper order respectively, and each end is followed the direction of penetrating and is multistage the centre bore of impeller and the radial dimension of corresponding main shaft increase gradually in proper order.

2. The integrated compressor package of claim 1, wherein: an interstage seal is arranged between the compression stages and is a labyrinth seal.

3. The integrated compressor package of claim 2, wherein: and a balance piston is arranged behind the last compression stage.

4. The integrated compressor package of claim 3, wherein: the impeller of each of the compression stages is a three-dimensional flow impeller.

5. The integrated compressor package of claim 1, wherein: the integrated compressor unit is supported by a magnetic bearing.

6. The integrated compressor package of claim 1, wherein: an air inlet air cylinder (3) and an exhaust air cylinder are arranged on the pressure-bearing shell (1) on one side of the compressor (4).

7. The integrated compressor package of claim 6, wherein: the air inlet end of the pressure-bearing shell (1) is provided with a pipe orifice, the pipe orifice is connected with a pipeline (8), and the pipeline (8) is used for introducing the medium air compressed by the first-stage impeller into the pressure-bearing shell (1) on one side of the motor (5) to cool the motor (5).

8. The integrated compressor package of claim 7, wherein: and the pipeline (8) is provided with a pressure regulating valve (7).

9. The integrated compressor package of claim 7, wherein: the pressure-bearing machine shell is characterized in that a manhole door is arranged in the middle of the pressure-bearing machine shell (1), and an electric penetrating piece (6) is arranged on the upper portion of the pressure-bearing machine shell (1).

10. The integrated compressor package of claim 1, wherein: the pressure-bearing shell (1) is forged by alloy steel, and the rotor is integrally milled.

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