CN110500269B - Volumetric compressor test system - Google Patents
Volumetric compressor test system Download PDFInfo
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- CN110500269B CN110500269B CN201910918544.9A CN201910918544A CN110500269B CN 110500269 B CN110500269 B CN 110500269B CN 201910918544 A CN201910918544 A CN 201910918544A CN 110500269 B CN110500269 B CN 110500269B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
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Abstract
A positive displacement compressor test system comprising: the system comprises a tested compressor assembling section, a condenser and a first flow regulating valve which are sequentially connected through pipelines, wherein an outlet of the first flow regulating valve is connected with an inlet of the tested compressor assembling section; and a second flow regulating valve connecting the inlet and the outlet of the loaded compressor assembly section. The system provided by the invention adopts a refrigerant as a circulating medium, hot gas and cold liquid are neutralized by the branch provided with the fourth flow regulating valve and the branch connected with the condenser and the third flow regulating valve in series, the adjustment of the suction temperature and the suction pressure of the tested compressor is realized, the adjustment of the exhaust pressure is realized by the condenser, and the test in a large working condition range can be carried out.
Description
Technical Field
The invention relates to a compressor testing system.
Background
In a displacement compressor testing system or a compressor replacement system in the prior art, when a compressor is tested, non-refrigerant gas is generally adopted as a circulating medium, a top pressure control valve and a suction control valve are utilized, the suction pressure and the discharge pressure of the tested compressor are controlled in a mode of top pressure and suction of the gas, and the suction temperature of the tested compressor is controlled by heating and cooling the gas. However, this method can achieve a small control range of the suction pressure, the discharge pressure, and the suction temperature, and cannot perform a large working condition range test.
In the prior art, a compressor replacement system using a refrigerant as a circulating medium generally adopts a complete refrigeration cycle as an air conditioner, and comprises a condenser, an expansion valve and an evaporator, and the suction temperature or suction pressure of a detected compressor is usually controlled by adjusting the heat exchange capacity of the evaporator, so that the mode is difficult to achieve lower suction temperature and suction pressure, for example, a wind side cooling loop of the evaporator may be required to achieve an inlet air temperature of-30 degrees, which is difficult to achieve and consumes more energy. It is also difficult to practice large range testing in this manner.
Second, existing systems are not capable of performing many different types of compressor testing, such as enthalpy-increasing compressors and liquid spray compressors.
Disclosure of Invention
It is an object of the present invention to provide a positive displacement compressor testing system to address at least one of the above problems.
According to one aspect of the present invention, there is provided a positive displacement compressor testing system comprising:
the system comprises a tested compressor assembling section, a condenser and a first flow regulating valve which are sequentially connected through pipelines, wherein an outlet of the first flow regulating valve is connected with an inlet of the tested compressor assembling section;
and a second flow regulating valve connecting the inlet and the outlet of the loaded compressor assembly section.
The system of the invention adopts the refrigerant as the circulating medium, realizes the regulation of the exhaust pressure through the condenser, neutralizes the hot gas and the cold liquid through the branch provided with the fourth flow regulating valve and the branch connected with the condenser and the third flow regulating valve in series, realizes the regulation of the suction temperature and the suction pressure of the tested compressor, and can carry out the test in a larger working condition range compared with the scheme of adopting non-refrigerant gas or adopting the complete refrigerant refrigeration cycle comprising an evaporator in the prior art.
In some embodiments, further comprising:
the first temperature sensor and the first pressure sensor are respectively used for measuring the suction temperature and the suction pressure of the tested compressor, and the second pressure sensor is used for measuring the discharge pressure of the tested compressor;
the opening degree of the second flow regulating valve is set to be adjustable according to the pressure value measured by the first pressure sensor;
the opening degree of the first flow regulating valve is set to be adjustable according to the temperature value measured by the first temperature sensor;
the heat exchange capacity of the condenser is set to be adjustable according to the pressure value measured by the second pressure sensor.
Therefore, the control of the suction pressure of the tested compressor is realized through the arrangement of the first pressure sensor and the second flow regulating valve, the control of the suction temperature of the tested compressor is realized through the arrangement of the first temperature sensor and the first flow regulating valve, and the control of the exhaust pressure of the tested compressor is realized through the arrangement of the second pressure sensor and the condenser.
In some embodiments, the gas-liquid separator is further provided, and the inlets of the gas-liquid separator are respectively connected with the outlet of the first flow regulating valve and the outlet of the second flow regulating valve, and the outlets of the gas-liquid separator are connected with the inlet of the tested compressor assembly section.
Therefore, liquid can be prevented from entering the tested compressor, and the normal operation of the tested compressor is ensured.
In some embodiments, the apparatus further comprises a first shut-off valve and a second shut-off valve respectively disposed at an inlet and an outlet of the loaded compressor mounting section.
Therefore, whether the tested compressor is connected to the system or not is convenient to control.
In some embodiments of the present invention, the substrate is,
the tested compressor assembling section is also provided with a middle inlet;
the third cut-off valve is connected with the middle inlet; and
and the third flow regulating valve is connected with the outlet of the condenser and the inlet of the third cut-off valve.
Therefore, the cold liquid is sent to the tested compressor through the middle inlet by the third flow regulating valve, so that the exhaust temperature of the tested compressor is regulated, and the liquid spraying compressor can be tested.
In some embodiments, further comprising: a second temperature sensor for measuring the temperature of the exhaust gas of the tested compressor; the opening degree of the third flow rate adjustment valve is set to be adjustable according to the temperature value measured by the second temperature sensor.
Therefore, the exhaust temperature of the measured liquid jet compressor is controlled by the arrangement of the second temperature sensor and the third flow regulating valve.
In some embodiments, further comprising: and the fourth flow regulating valve and the fourth stop valve are connected in series between the outlet of the tested compressor assembly section and the inlet of the third stop valve.
Therefore, through the fourth flow regulating valve and the fourth stop valve, hot gas discharged by the pressure-measuring compressor and cold liquid entering through the third flow regulating valve are neutralized, the neutralized gas is sent into the pressure-measuring compressor through the middle inlet, the temperature and the pressure of the middle inlet can be regulated, and the enthalpy-increasing compressor is tested.
In some embodiments, further comprising:
a third temperature sensor and a third pressure sensor for measuring an intermediate temperature and an intermediate pressure of the measured compressor;
the opening degree of the third flow regulating valve is set to be capable of being switched to be regulated according to the temperature value measured by the third temperature sensor;
the opening degree of the fourth flow rate adjustment valve is set to be adjustable according to the pressure value measured by the third pressure sensor.
Therefore, the intermediate temperature of the tested compressor is controlled through the arrangement of the third temperature sensor and the third flow regulating valve, and the intermediate pressure of the tested compressor is controlled through the third pressure sensor and the fourth flow regulating valve.
In some embodiments, further comprising:
the first PID controller is used for controlling the opening degree of the first flow regulating valve according to the temperature value measured by the first temperature sensor;
a second PID controller for controlling the opening degree of the second flow rate regulation valve based on the pressure value measured by the first pressure sensor;
and the third PID controller is used for controlling the heat exchange quantity of the condenser according to the pressure value measured by the second pressure sensor.
Therefore, the precise and efficient control of the relevant parameters is realized through the closed-loop automatic control technology of the PID controller.
In some embodiments, further comprising:
the fourth PID controller is used for controlling and adjusting the opening of the third flow regulating valve according to the temperature value measured by the third temperature sensor; the fourth PID controller can also be switched to control the opening degree of the third flow regulating valve according to the temperature value measured by the second temperature sensor;
and the fifth PID controller is used for adjusting the opening of the fourth flow regulating valve according to the pressure value measured by the third pressure sensor.
Therefore, the precise and efficient control of the relevant parameters is realized through the closed-loop automatic control technology of the PID controller.
Drawings
FIG. 1 is a schematic diagram of a positive displacement compressor test system according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The system of the invention provides a volumetric compressor testing system (hereinafter referred to as the system) which can be used for testing the service life and the durability of a compressor and can also be used for testing noise, vibration and the like. The system includes a line portion and a control portion.
The control portion of the system includes a first PID controller 35, a second PID controller 31, a third PID controller 32, a fourth PID controller 34, and a fifth PID controller 33. The PID controller controls the corresponding actuators (flow rate adjusting valve and cooling circuit of the condenser 5) based on the results measured by the respective measuring elements and the set target values so that the measured results of the respective measuring elements reach the target values. The working mode and control principle of the PID controller itself belong to the prior art, and are not described herein. The specific arrangement of each PID controller is as follows.
The piping portion of the system is shown in fig. 1, and includes a base circuit and an intermediate circuit.
The basic circuit includes a gas-liquid separator 10, a first cut-off valve 11, a section 1 to be subjected to load compression, a second cut-off valve 2, a condenser 5, a first flow rate regulating valve 8, a second flow rate regulating valve 3, a first temperature sensor 21, a second temperature sensor 24, a first pressure sensor 22, and a second pressure sensor 23. The gas-liquid separator 10, the first cut-off valve 11, the section 1 to be subjected to load compressor mounting, the second cut-off valve 2, the condenser 5, and the first flow rate adjusting valve 8 are connected in this order by pipes. The outlet of the first flow rate adjustment valve 8 is connected to the inlet of the gas-liquid separator 10. The second flow rate adjustment valve 3 is connected to the inlet of the gas-liquid separator 10 and the outlet of the second shut valve 2.
The tested compressor assembling section 1 is used for installing a tested compressor and comprises an inlet, an outlet and an intermediate inlet which are respectively connected with the corresponding inlet, outlet and intermediate inlet of the tested compressor. Wherein the single-stage compressor has no intermediate inlet and does not need to be connected; the middle inlet of the liquid spraying compressor is used for introducing a liquid or gas-liquid two-phase refrigerant; the enthalpy increasing compressor has a two-stage compression function with an intermediate inlet disposed between two compression passages for passing a gaseous refrigerant.
The first cut-off valve 11 and the second cut-off valve 2 are used for controlling the on-off connection of the tested compressor, and are opened and closed as required during testing.
The first temperature sensor 21 and the first pressure sensor 22 are provided at an inlet of the loaded compressor mounting section 1 for measuring a suction temperature and a suction pressure of the loaded compressor, respectively. The second temperature sensor 24 and the second pressure sensor 23 are provided at the outlet of the section 1 where the load is mounted, for measuring the discharge temperature and the discharge pressure of the load, respectively.
The condenser 5 is used for converting the high-temperature and high-pressure gas output by the pressure-measured compressor into liquid, and the heat exchange amount of the liquid is set to be adjustable according to the pressure value measured by the second pressure sensor 23, so that the exhaust pressure of the pressure-measured compressor is adjusted to reach and stabilize the target value. Specifically, the third PID controller 32 controls the heat exchange amount of the condenser 5 (specifically, controls the cooling circuit of the condenser 5) by a closed-loop automatic control technique according to the written target value of the discharge pressure of the measured compressor, so that the reading of the second pressure sensor 23 reaches and stabilizes at the target value of the discharge pressure.
This first flow control valve 8 works as the expansion valve, step down the liquid refrigerant that condenser 5 discharged, its exhaust low temperature low pressure gas-liquid is two-phase or liquid meets with the high temperature low pressure gas that is measured the compressor exhaust that second flow control valve 3 directly carried, cool down high temperature low pressure gas, the gas that both mix for pressure and temperature accord with the pressure of breathing in and the temperature of breathing in of being measured the compressor, rethread vapour and liquid separator 10 is with liquid separation (if there is liquid), prevent that liquid from getting into being measured the compressor. The opening degree of the first flow rate adjusting valve 8 is set to be adjustable according to the temperature value measured by the first temperature sensor 21, so that the suction temperature of the compressor is adjusted to reach and stabilize at a target value. Specifically, the first PID controller 35 controls the opening degree of the first flow rate adjustment valve 8 by a closed-loop automatic control technique according to the written intake air temperature target value of the compressor to be tested, so that the reading of the first temperature sensor 21 reaches and stabilizes at the intake air temperature target value. The opening degree of the second flow rate adjustment valve 3 is set to be adjustable according to the pressure value measured by the first pressure sensor 22, so that the suction pressure of the compressor to be measured is adjusted to reach and stabilize at a target value. Specifically, the second PID controller 31 controls the opening degree of the second flow rate adjustment valve 3 by a closed-loop automatic control technique according to the written intake pressure target value of the compressor to be tested, so that the reading of the first pressure sensor 22 reaches and stabilizes at the intake pressure target value.
The intermediate circuit comprises a third flow regulating valve 7, a fourth flow regulating valve 4, a third shut-off valve 9, a fourth shut-off valve 6, a third temperature sensor 26 and a third pressure sensor 25.
The third temperature sensor 26 and the third pressure sensor 25 are provided at the middle inlet position of the tested compressor mounting section 1 for detecting the middle temperature and the middle pressure of the tested compressor, respectively. The outlet of the third cut-off valve 9 is connected to the intermediate inlet of the compressor assembling section 1 to control the opening and closing of the intermediate inlet. The third flow rate adjustment valve 7 is connected between the outlet of the condenser 5 and the inlet of the third cut valve 9, and is used for depressurizing the liquid refrigerant discharged from the condenser 5 and introducing the liquid refrigerant into the intermediate inlet of the compressor to be tested. The fourth flow regulating valve 4 and the fourth cut-off valve 6 are connected in series, connected between the outlet of the second cut-off valve 2 and the inlet of the third cut-off valve 9, and used for reducing the pressure of the high-temperature and high-pressure gas discharged by the load-measuring compressor and introducing the gas into the middle inlet of the load-measuring compressor.
When the tested compressor is a single-stage compressor, the first cut-off valve 11 and the second cut-off valve 2 are opened, and the fourth cut-off valve 6 and the third cut-off valve 9 are both closed, so that the intermediate loop is closed, and only the suction temperature, the suction pressure and the discharge pressure of the tested compressor need to be controlled.
When the tested compressor is a liquid spraying compressor, the suction temperature, the exhaust temperature, the suction pressure and the exhaust pressure of the tested compressor need to be controlled. Wherein, the first cut-off valve 11 and the second cut-off valve 2 are opened, the fourth cut-off valve 6 is closed, the third cut-off valve 9 is opened, and the opening degree of the third flow regulating valve 7 is set to be adjustable according to the temperature value measured by the second temperature sensor 24, so that the exhaust temperature of the tested compressor is regulated to reach and stabilize at the target value. Specifically, the fourth PID controller 34 controls the opening degree of the third flow rate adjustment valve 7 by a closed-loop automatic control technique according to the written target value of the discharge temperature of the compressor to be measured, so that the reading of the second temperature sensor 24 reaches and stabilizes at the target value of the discharge temperature.
When the measured compressor is an enthalpy-increasing compressor, it is necessary to control the suction temperature, the intermediate inlet temperature, the suction pressure, and the discharge pressure of the measured compressor. Wherein first shut-off valve 11 and second shut-off valve 2 are opened, third shut-off valve 9 and fourth shut-off valve 6 are both opened, and the opening degree of third flow control valve 7 is set to be adjustable according to the temperature value measured by third temperature sensor 26, so as to adjust the intermediate inlet temperature of the compressor to be measured, and make it reach and stabilize at the target value. Specifically, the fourth PID controller 34 is provided to be switchable, the signal source of which is switched from the second temperature sensor 24 to the third temperature sensor 26, and controls the opening degree of the third flow rate adjustment valve 7 by a closed-loop automatic control technique according to the written intermediate inlet temperature target value of the measured compressor, so that the reading of the third temperature sensor 26 reaches and stabilizes at the intermediate inlet temperature target value. The opening degree of the fourth flow rate adjustment valve 4 is set to be adjustable according to the temperature value measured by the third pressure sensor 25, so that the intermediate inlet pressure of the compressor to be measured is adjusted to reach and stabilize at the target value. Specifically, the fifth PID controller 33 controls the opening degree of the fourth flow rate adjustment valve 4 by a closed-loop automatic control technique according to the written intermediate inlet pressure target value of the compressor to be tested, so that the reading of the third pressure sensor 25 reaches and stabilizes at the intermediate inlet pressure target value.
The cut-off valve of the invention is preferably an electric/pneumatic ball valve, the flow control valve is preferably an electric throttle valve, and the flow control valve can be a valve member or a plurality of valve members which are connected in parallel to increase the working condition range and the testing range. The condenser 5 may adopt a single condenser 5 or a plurality of condensers 5 connected in parallel to each other to improve the adjustment accuracy.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made, or combinations of the above-described embodiments can be made without departing from the spirit of the invention, and the scope of the invention is to be determined by the appended claims.
Claims (6)
1. A positive displacement compressor test system, comprising:
the device comprises a tested compressor assembling section (1), a condenser (5) and a first flow regulating valve (8) which are sequentially connected through a pipeline, wherein an outlet of the first flow regulating valve (8) is connected with an inlet of the tested compressor assembling section (1);
the second flow regulating valve (3) is connected with the inlet and the outlet of the tested compressor assembling section (1);
the tested compressor assembling section (1) is also provided with a middle inlet;
also comprises a third shut-off valve (9) connected with the intermediate inlet; and
the third flow regulating valve (7) is connected with the outlet of the condenser (5) and the inlet of the third cut-off valve (9), and is used for depressurizing the liquid refrigerant discharged by the condenser (5) and introducing the liquid refrigerant into the middle inlet;
a second temperature sensor (24) for measuring the temperature of the exhaust gas of the tested compressor; the opening degree of the third flow regulating valve (7) is set to be adjustable according to the temperature value measured by the second temperature sensor (24);
a fourth flow regulating valve (4) and a fourth shut-off valve (6) which are connected in series between the outlet of the tested compressor assembly section (1) and the inlet of the third shut-off valve (9) and are used for reducing the pressure of the high-temperature high-pressure gas discharged by the tested compressor and introducing the high-temperature high-pressure gas into the middle inlet;
a third temperature sensor (26) and a third pressure sensor (25) for measuring the intermediate temperature and the intermediate pressure of the compressor under test;
the opening degree of the third flow regulating valve (7) is set to be capable of being switched to be regulated according to the temperature value measured by the third temperature sensor (26);
the opening degree of the fourth flow regulating valve (4) is set to be adjustable according to the pressure value measured by the third pressure sensor (25).
2. The positive displacement compressor test system of claim 1, further comprising:
a first temperature sensor (21) and a first pressure sensor (22) for measuring the suction temperature and suction pressure of the tested compressor, respectively, a second pressure sensor (23) for measuring the discharge pressure of the tested compressor;
the opening degree of the second flow regulating valve (3) is set to be adjustable according to the pressure value measured by the first pressure sensor (22);
the opening degree of the first flow regulating valve (8) is set to be adjustable according to the temperature value measured by the first temperature sensor (21);
the heat exchange capacity of the condenser (5) is set to be adjustable according to the pressure value measured by the second pressure sensor (23).
3. The positive displacement compressor test system of claim 1, wherein: the gas-liquid separator (10) is further provided, the inlet of the gas-liquid separator is respectively connected with the outlet of the first flow regulating valve (8) and the outlet of the second flow regulating valve (3), and the outlet of the gas-liquid separator is connected with the inlet of the tested compressor assembly section (1).
4. The positive displacement compressor test system of claim 1, wherein: the device also comprises a first cut-off valve (11) and a second cut-off valve (2) which are respectively arranged at the inlet and the outlet of the tested compressor assembling section (1).
5. The positive displacement compressor test system of claim 2, further comprising:
a first PID controller (35) for controlling the opening degree of the first flow rate regulation valve (8) according to a temperature value measured by the first temperature sensor (21);
a second PID controller (31) for controlling the opening degree of the second flow rate regulation valve (3) in accordance with the pressure value measured by the first pressure sensor (22);
a third PID controller (32) for controlling the heat exchange amount of the condenser (5) according to the pressure value measured by the second pressure sensor (23).
6. The positive displacement compressor test system of any one of claims 1 to 4, further comprising:
a fourth PID controller (34) for controlling the adjustment of the opening degree of the third flow rate adjustment valve (7) according to the temperature value measured by the third temperature sensor (26); the fourth PID controller (34) can be switched to control the opening degree of the third flow regulating valve (7) according to the temperature value measured by the second temperature sensor (24);
a fifth PID controller (33) for adjusting the opening of the fourth flow regulating valve (4) according to the pressure value measured by the third pressure sensor (25).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910918544.9A CN110500269B (en) | 2019-09-26 | 2019-09-26 | Volumetric compressor test system |
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| CN201910918544.9A CN110500269B (en) | 2019-09-26 | 2019-09-26 | Volumetric compressor test system |
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| CN110500269A CN110500269A (en) | 2019-11-26 |
| CN110500269B true CN110500269B (en) | 2021-09-21 |
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| CN114414274B (en) * | 2021-12-28 | 2024-07-19 | 势加透博(重庆)科技有限公司 | Measurement and control system of closed refrigeration cycle test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100315959B1 (en) * | 1999-09-28 | 2001-12-12 | 김평길 | Performance tester of two-stage centrifugal compressor |
| CN102338075A (en) * | 2011-10-15 | 2012-02-01 | 合肥天鹅制冷科技有限公司 | Performance test device and test method for refrigeration compressor |
| CN202690404U (en) * | 2012-08-17 | 2013-01-23 | 上海出入境检验检疫局机电产品检测技术中心 | Compressor safety test system |
| CN202885326U (en) * | 2012-10-31 | 2013-04-17 | 南京五洲制冷集团有限公司 | Double-unit twin-stage compression refrigerating unit |
| CN104847647A (en) * | 2014-12-22 | 2015-08-19 | 北汽福田汽车股份有限公司 | Compressor durability test equipment |
| CN104896821A (en) * | 2015-05-19 | 2015-09-09 | 合肥天鹅制冷科技有限公司 | Refrigerating system energy adjusting device |
| CN107013450B (en) * | 2017-05-04 | 2019-08-02 | 天津大学 | A kind of energy-saving compressor method for testing performance and device |
| CN207297314U (en) * | 2017-10-09 | 2018-05-01 | 珠海格力电器股份有限公司 | Compressor volumetric efficiency testing device |
| CN207761921U (en) * | 2017-12-28 | 2018-08-24 | 潍柴动力股份有限公司 | A kind of load simulating device for testing air conditioner compressor |
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