WO2018072512A1 - 多级离心压缩机 - Google Patents

多级离心压缩机 Download PDF

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Publication number
WO2018072512A1
WO2018072512A1 PCT/CN2017/094497 CN2017094497W WO2018072512A1 WO 2018072512 A1 WO2018072512 A1 WO 2018072512A1 CN 2017094497 W CN2017094497 W CN 2017094497W WO 2018072512 A1 WO2018072512 A1 WO 2018072512A1
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Prior art keywords
centrifugal compressor
cooling
cooling passage
multistage centrifugal
medium
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English (en)
French (fr)
Inventor
陈玉辉
张治平
钟瑞兴
蒋楠
刘建飞
蒋彩云
刘增岳
周义
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Publication of WO2018072512A1 publication Critical patent/WO2018072512A1/zh
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F04D29/5826—Cooling at least part of the working fluid in a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/10—Centrifugal pumps for compressing or evacuating
    • F04D17/12—Multi-stage pumps
    • F04D17/122—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • the present invention relates to the field of centrifugal compressors, and in particular to a multi-stage centrifugal compressor.
  • the gas is converted from a low-temperature low-pressure gas to a medium-temperature medium-pressure gas after being compressed by the first-stage impeller, and the medium-temperature medium-pressure gas is converted into a high-temperature high-pressure gas by the compression of the secondary impeller.
  • the whole process is close to isentropic compression, and if the middle gas is properly cooled, the medium-temperature medium-pressure gas is cooled to a low-temperature medium-pressure gas and then compressed, and the compression efficiency is greatly improved.
  • the present invention is directed to a multistage centrifugal compressor capable of improving compression efficiency.
  • the present invention provides a multi-stage centrifugal compressor including an intermediate flow path member on which an inner wall surface of the intermediate flow path member is provided with a cooling passage.
  • the intermediate flow path component includes a diffuser disposed on an inner wall surface of the diffuser.
  • the inlet and outlet ends of the cooling passage extend to the exterior of the diffuser.
  • the cooling medium inside the cooling passage is compressor refrigerant or water.
  • cooling passages are cast on the diffuser by means of hybrid casting.
  • cooling channels are cast from aluminum or copper.
  • the cooling passage is embedded in the inner wall surface of the intermediate flow path member.
  • the cross-sectional shape of the cooling passage may be circular, semi-circular or rectangular.
  • the cooling passage is a cooling coil, and the cooling coil forms a heat exchange plane on the inner wall surface of the intermediate runner part.
  • the multistage centrifugal compressor of the present invention by providing a cooling passage on the inner wall surface of the intermediate flow path member, Therefore, the medium-temperature medium-pressure gas after the first-stage compression is cooled and cooled, so that the medium-temperature medium-pressure gas is cooled to a low-temperature medium-pressure gas and recompressed, and the compression efficiency can be effectively improved.
  • Figure 1 is a partial structural schematic view of a multistage centrifugal compressor according to the present invention
  • Figure 2 is a schematic view showing the structure of a diffuser of a multistage centrifugal compressor according to the present invention
  • Figure 3 is a schematic view showing the structure of a cooling passage of a multistage centrifugal compressor according to the present invention.
  • a multistage centrifugal compressor includes an intermediate flow path member on which an inner passage surface of an intermediate flow path member is provided with a cooling passage 20.
  • the cooling passage 20 is provided on the inner wall surface of the intermediate flow path member, thereby cooling the first-stage compressed medium-temperature medium-pressure gas, thereby cooling the medium-temperature medium-pressure gas to a low-temperature medium-pressure gas and compressing. Can effectively improve compression efficiency.
  • the present invention uses a multi-part hybrid casting technique to cast a multi-stage centrifugal compressor intermediate runner component into a hybrid structure of a plurality of structures or a plurality of materials, so that a single component has various structures or properties of a plurality of materials. That is, a cooling channel structure such as a copper tube or an aluminum tube is cast in the intermediate flow path member, and cold water or a refrigerant is introduced into the copper tube or the aluminum tube, thereby reducing the surface temperature of the intermediate flow path member and reducing the gas inside the intermediate flow path member. Cooling to achieve the purpose of improving compressor efficiency.
  • a cooling channel structure such as a copper tube or an aluminum tube is cast in the intermediate flow path member, and cold water or a refrigerant is introduced into the copper tube or the aluminum tube, thereby reducing the surface temperature of the intermediate flow path member and reducing the gas inside the intermediate flow path member. Cooling to achieve the purpose of improving compressor efficiency.
  • the intermediate runner component includes a diffuser 10 and a reflux.
  • the cooling passage 20 is disposed on the inner wall surface of the diffuser 10, and the cooling passage 20 and the diffuser 10 are integrally molded by the hybrid casting method on the flow passage wall surface of the diffuser 10.
  • the cooling passage 20 side is preferably a planar structure, that is, the heat exchange plane 30 is formed.
  • the cross-sectional shape of the cooling passage 20 may also be circular, semi-circular or rectangular, that is, the flow passage surface of the cooling passage 20 may or may not be planar, and when not planar, the tube Interstitial
  • the gap is the material of the casting itself, and even if the cooling passage 20 is embedded in the inner wall surface of the intermediate flow path member, the flow passage surface of the part as a whole has a planar structure.
  • the cooling passage 20 needs to reserve an inlet section and an outlet section to facilitate connection with an external pipe.
  • the cooling passage 20 is preferably a spiral-shaped heat exchange coil to maximize the heat exchange area of the cooling passage 20 and the highest heat exchange efficiency, thereby maximizing the efficiency of the compressor.
  • the medium inlet 21 of the cooling passage 20 is connected to the high pressure liquid refrigerant zone, and a throttle device is installed in the middle of the connecting pipe, and the medium outlet 22 of the cooling passage 20 is connected.
  • Low pressure gaseous refrigerant zone When operation, the high-pressure liquid refrigerant becomes a low-pressure liquid refrigerant through the throttling device, and evaporates into a low-pressure gaseous refrigerant in the cooling passage 20, and absorbs heat to reduce the temperature of the cooling pipe, and returns the low-pressure gaseous refrigerant to the low-pressure gas. In the tank, the cooling process is completed.
  • cooling passage 20 If the sealing performance of the cooling passage 20 is sufficiently good, other cooling medium such as water or the like may be introduced into the cooling passage 20. This can reduce the use of refrigerant and further improve the performance of the unit.
  • the multistage centrifugal compressor of the present invention by providing the cooling passage 20 on the inner wall surface of the intermediate flow path member, the first-stage compressed medium-temperature medium-pressure gas is cooled and cooled, thereby cooling the medium-temperature medium-pressure gas. Re-compression of low-temperature medium-pressure gas can effectively improve compression efficiency.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

一种多级离心压缩机，包括中间流道零件，中间流道零件的内壁面上设置有冷却通道（20）。根据该多级离心压缩机，通过在中间流道零件的内壁面上设置有冷却通道，从而对一级压缩后的中温中压的气体冷却降温，从而将中温中压的气体冷却变为低温中压的气体再压缩，能够有效提高压缩效率。

Description

多级离心压缩机
相关申请
本发明申请要求2016年10月21日申请的，申请号为201610920124.0，名称为“多级离心压缩机”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本发明涉及离心压缩机领域，具体而言，涉及一种多级离心压缩机。
背景技术
多级离心压缩机在运行时，气体经过第一级叶轮压缩之后由低温低压的气体变成中温中压的气体，中温中压的气体再经过二级叶轮的压缩变为高温高压的气体。整个过程接近等熵压缩，而如果中间的气体经过适当冷却，将中温中压的气体冷却变为低温中压的气体再压缩，其压缩效率会有很大的提高。
发明内容
本发明旨在提供一种能够提升压缩效率的多级离心压缩机。
本发明提供了一种多级离心压缩机，包括中间流道零件，中间流道零件的内壁面上设置有冷却通道。
可选择的，中间流道零件包括扩压器，冷却通道设置在扩压器的内壁面上。
可选择的，冷却通道的进口端和出口端延伸至扩压器的外部。
可选择的，冷却通道内部冷却介质为压缩机冷媒或者水。
可选择的，冷却通道采用混合铸造方式铸造在扩压器上。
可选择的，冷却通道采用铝或者铜材料铸造。
可选择的，冷却通道嵌入在中间流道零件的内壁面上。
可选择的，冷却通道的截面形状可以为圆形、半圆形或矩形。
可选择的，冷却通道为冷却盘管，且冷却盘管在中间流道零件的内壁面上形成换热平面。
根据本发明的多级离心压缩机，通过在中间流道零件的内壁面上设置有冷却通道， 从而对一级压缩后的中温中压的气体冷却降温，从而将中温中压的气体冷却变为低温中压的气体再压缩，能够有效提高压缩效率。
附图说明
构成本申请的一部分的附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明的多级离心压缩机的局部结构示意图；
图2是根据本发明的多级离心压缩机的扩压器的结构示意图；
图3是根据本发明的多级离心压缩机的冷却通道的结构示意图。
附图标记说明：
10、扩压器；20、冷却通道；21、介质进口；22、介质出口；30、换热平面。
具体实施方式
下面将参考附图并结合实施例来详细说明本发明。
如图1至3所示，根据本发明的多级离心压缩机，包括中间流道零件，中间流道零件的内壁面上设置有冷却通道20。本发明通过在中间流道零件的内壁面上设置有冷却通道20，从而对一级压缩后的中温中压的气体冷却降温，从而将中温中压的气体冷却变为低温中压的气体再压缩，能够有效提高压缩效率。
具体地，本发明采用多零件混合铸造技术将多级离心压缩机中间流道零件铸造为多种结构或者多种材料的混合零件，使单个零件具备多种结构或者多种材料的性能。也即在中间流道零件内铸造出铜管或者铝管等冷却通道结构，铜管或者铝管内通入冷水或者冷媒，从而降低中间流道零件表面温度降低，对中间流道零件内部的气体进行冷却，从而达到提升压缩机效率的目的。
一般地，中间流道零件包括扩压器10和回流器。结合图2所示，在本发明中，冷却通道20设置在扩压器10的内壁面上，在扩压器10的流道壁面通过混合铸造方法将冷却通道20与扩压器10铸为一体。优选地，由于扩压器10的流道壁面为冷却通道20的壁面，由于流道面需为平面，因此冷却通道20一面最好为平面结构，即形成换热平面30。在不同的实施方式中，冷却通道20的截面形状也可以为圆形、半圆形或矩形，也即冷却通道20的流道面可以为平面也可以不为平面，当不为平面时，管间缝 隙为铸件本身材料，也即使冷却通道20嵌入在中间流道零件的内壁面上，从而使零件的流道面整体呈平面结构。冷却通道20需预留进口段与出口段，以便于与外部管道连接。如图3所示，冷却通道20最好为螺旋环状的换热盘管，以便使冷却通道20换热面积达到最大，换热效率最高，从而最大限度的提升压缩机的效率。
在本发明中，当冷却通道20内部冷却介质为压缩机冷媒时，冷却通道20的介质进口21连接到高压液态冷媒区，并在连接管中间装节流装置，冷却通道20的介质出口22连接低压气态冷媒区。工作时，高压液体冷媒经节流装置后变为低压液态冷媒，并在冷却通道20中蒸发为低压气态冷媒，同时吸收热量，达到降低冷却管温度的作用，并将低压气态冷媒回到低压气体罐中，从而完成冷却过程。
如果冷却通道20的密封性能足够好，也可以在冷却通道20内通入其他冷却介质，比如水等。这样可以减少冷媒的使用，进一步提升机组的性能。
从以上的描述中，可以看出，本发明上述的实施例实现了如下技术效果：
根据本发明的多级离心压缩机，通过在中间流道零件的内壁面上设置有冷却通道20，从而对一级压缩后的中温中压的气体冷却降温，从而将中温中压的气体冷却变为低温中压的气体再压缩，能够有效提高压缩效率。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (9)

  1. 一种多级离心压缩机，包括中间流道零件，其特征在于，所述中间流道零件的内壁面上设置有冷却通道(20)。
  2. 根据权利要求1所述的多级离心压缩机，其特征在于，
    所述中间流道零件包括扩压器(10)，所述冷却通道(20)设置在所述扩压器(10)的内壁面上。
  3. 根据权利要求2所述的多级离心压缩机，其特征在于，
    所述冷却通道(20)的进口端和出口端延伸至所述扩压器(10)的外部。
  4. 根据权利要求1所述的多级离心压缩机，其特征在于，
    所述冷却通道(20)内部冷却介质为压缩机冷媒或者水。
  5. 根据权利要求2所述的多级离心压缩机，其特征在于，
    所述冷却通道(20)采用混合铸造方式铸造在所述扩压器(10)上。
  6. 根据权利要求5所述的多级离心压缩机，其特征在于，
    所述冷却通道(20)采用铝或者铜材料铸造。
  7. 根据权利要求1所述的多级离心压缩机，其特征在于，
    所述冷却通道(20)嵌入在所述中间流道零件的内壁面上。
  8. 根据权利要求1所述的多级离心压缩机，其特征在于，
    所述冷却通道(20)的截面形状可以为圆形、半圆形或矩形。
  9. 根据权利要求1至8中任一项所述的多级离心压缩机，其特征在于，
    所述冷却通道(20)为冷却盘管，且所述冷却盘管在所述中间流道零件的内壁面上形成换热平面(30)。
PCT/CN2017/094497 2016-10-21 2017-07-26 多级离心压缩机 Ceased WO2018072512A1 (zh)

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CN107355431A (zh) * 2017-07-10 2017-11-17 珠海格力电器股份有限公司 扩压器和压缩机
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