Related Info

Over 560,000 kilometers of Kia was overhauled, the air conditioner compressor bubbled, the owner: No wonder the air conditioner is not cool! Reciprocating compressor Refrigeration compressor configuration application and precautions Several safety protection methods for compressors in industrial chillers Tips for energy saving in refrigeration systems

Use and maintenance of screw refrigeration compressor

1. Introduction of screw compressor structure Screw refrigeration compressors are positive displacement compressors, which compress the gas by the change of volume. Screw refrigeration compressors are divided into single screw compressors and twin screw compressors. Among them, the twin screw compressor uses two screws with helical tooth grooves placed in the body to mesh and rotate and cooperate with the inner wall of the body and the inner wall of the suction and exhaust end seats, resulting in a change in the volume between the teeth to complete the gas Suction, compression and discharge process. Let's first look at the internal structure of a certain brand of screw compressor. If the picture is unclear, or if you need the information in this article, you can download it for free in our database. Common compressor components: Suction filter: installed at the suction port of the compressor, it can filter unclean particles and foreign objects in the system to prevent it from being sucked into the compressor and causing motor and rotor failure. Oil filter: In order to prevent foreign materials from iron filings from entering the volume adjustment mechanism and bearings, the machine parts are damaged. Built-in oil separator: oil filter for oil and gas separation. Capacity-adjusting solenoid valve: Control the required capacity adjustment for the best efficiency operation. Drain valve: It is used for draining the compressor oil or for maintenance. Oil sight glass: observe the oil flow when the compressor is running. Suction shut-off valve: used for compressor or system maintenance. Exhaust shut-off valve: used for compressor or system maintenance. Motor liquid spray angle valve: used to connect liquid refrigerant. Oil heater: During the shutdown period, the heater prevents excessive refrigerant from diluting into the oil. When the compressor is stopped, the heater should be powered on and run at startup. Oil level: It can be observed through the sight glass. Normally, the oil level should be kept between 1/2-3/4 of the sight glass. Non-return valve: Stop to prevent high-pressure gas from returning from the condenser to the compressor. Prevent the impact of reverse pressure on the compressor and the reverse rotation of the rotor. Exhaust gas temperature monitoring: The lack of oil will cause a sudden increase in exhaust gas temperature, and the electronic protection module can monitor the exhaust gas temperature. Differential pressure switch: Use its on-off ability to control the on-off, in order to ensure that the equipment can shut down the protection equipment in time when the pressure is abnormal. Cooling capacity control: adjust according to the cooling capacity of 100-75-50-25%, the slider has 4 corresponding positions, the slider is directly connected to the sliding valve moving in the hydraulic cylinder, and the position of the sliding valve is controlled by the solenoid valve. The actual shape of the valve changes the suction port. 2. Oil circulation system The role of freezing oil: to take away the heat generated by the compression of the screw rotor and reduce the temperature of the compressor discharge. According to different application conditions, add an oil cooler to the oil circulation system to reduce the temperature of the refrigeration oil, control the compressor discharge temperature, and use the method of directly injecting refrigerant liquid on the suction side and the middle side of the compressor to control the compressor discharge temperature. When the compressor has no additional cooling exhaust temperature higher than 110 ℃ design conditions, it is recommended to install an oil cooler. When the evaporation temperature of the system is lower than -25 ℃, it is recommended to install an oil injection device to the compressor to improve the compression efficiency. Refrigerating oil flow rate: The refrigerating oil circulation is generated by the pressure difference, so the flow rate of the refrigerating oil depends on the pressure difference between the exhaust and the suction. Refrigerating oil replacement: Refrigerating oil is one of the most important factors to ensure the efficient and safe operation of compressors and refrigeration systems. It ensures the normal operation of the compressor, lubrication, cooling, sealing and driving capacity adjustment sliders. Regular inspection or replacement of frozen oil: the system pipelines of refrigeration and refrigeration systems are generally more complicated, and they are mostly assembled on site. The first commissioning operation is required. If the oil changes color, please replace the frozen oil immediately, and clean the oil filter at the same time, run for 1000 hours After checking and replacing the freezing oil, clean the oil filter. If the system is clean, it can be replaced every 10,000 hours. The acidification of the freezing oil will directly affect the life of the compressor motor. The acidity of the freezing oil should be checked regularly. Generally, the acidity of the freezing oil should be replaced when the acidity is lower than PH6. dry. Refrigerating oil replacement method: The system refrigerant is recovered to the condenser side, the refrigerant in the compressor is removed, and the frozen oil is discharged from the oil drain angle valve of the compressor. The lubricating oil of the compressor is discharged from the oil drain valve on the oil filter. When the lubricating oil is nearly discharged, a certain amount of nitrogen is added from the high-pressure end of the compressor to detect the joint. Close the drain valve. Then remove the oil filter of the compressor, release all the lubricating oil in the oil tank, and then clean the oil filter and install it and tighten it. Fill lubricant according to the standard amount of the compressor. Simultaneously pump down the system. It is recommended to select the high (low) pressure side angle valve or other relatively high position for the contact of the vacuum pump to prevent the pump from being pumped to damage the vacuum pump. Observe whether the pressure rebounds when vacuum holding or leak checking. Fill with lubricating oil and connect it to the drain valve with a clean plastic tube. Put the other end of the plastic tube into the oil drum (the plastic tube is placed at the bottom of the oil drum). When filling oil, the oil drum should be closed to reduce air pollution to the oil. 3. Application of oil cooler It is necessary to use an oil cooler when operating under a large compression ratio (high condensation temperature or low evaporation temperature), especially when the exhaust temperature exceeds 110 ° C. Oil supply temperature after cooling by oil cooler: 50 ℃ ～ 70 ℃. The oil cooler uses water cooling method, air cooling method, refrigerant cooling method, etc. 4. Economizer The application of economizer (energy saver), that is, using the suction, compression, and exhaust of the screw compressor to perform in one direction, a supplementary air port is provided in the middle of the compressor to suck the flash vapor from the economizer (energy saver). In this way, the amount of compressed refrigerant gas is increased, and at the same time, the flash vapor absorbs the heat of the originally sucked vapor to make it supercooled, so the cooling capacity is increased, but the compression work is also slightly increased. Economizer (energy saver) system is more effective when used in high compression ratio (such as ice storage, low temperature system). The economizer system can be configured with two types of flash drum and subcooler. Treatment of compressor motor damage: Remove the low-pressure suction pipe, high-pressure exhaust pipe, and liquid supply pipe group for cleaning to remove pollutants; blow off the pollutants in the condenser and evaporator (refrigerant side) with nitrogen After the above work is completed, please evacuate the system piping first and seal it with nitrogen to prevent the system from being corroded by environmental humidity. After replacing the new compressor, the system must be tested for air tightness and vacuum, and replaced with a special dry filter. After an hour of trial operation of the unit, shut down to replace the new frozen oil and the special dry filter core, and then run the test machine. At the same time, confirm the cleanliness of the system and the acid value of the frozen oil. Special dry filter element until the cleanliness of the system and the acid value of the frozen oil are qualified.

Recent related posts

Use and maintenance of screw refrigeration compressor

06/14/2020

Use and maintenance of screw refrigeration compressor

Use and maintenance of screw refrigeration compressor 1. Introduction of screw compressor structure Screw refrigeration compressors are positive displacement compressors, which compress the gas by the change of volume. Screw refrigeration compress器2䀀ￜ皥䖒皦즠Ʋ嫜ི㲈Ʋ䌁皦ᮔǅ༬皧嫦ིЀ呄ᠾ鹨់༹皧

Tips for energy saving in refrigeration systems

06/14/2020

Tips for energy saving in refrigeration systems

Tips for energy saving in refrigeration systems Screw refrigeration compressor When setting the cooling capacity of the compressor, avoid the operating range of low energy efficiency ratio; for the refrigeration system with a large range of operating co器2䀀ￜ皥䖒皦즠Ʋ煔क़㲈Ʋ䌁皦ᮔǅ༬皧煞क़Ѐ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠Ʋب

Several safety protection methods for compressors in industrial chillers

06/14/2020

Several safety protection methods for compressors in industrial chillers

Several safety protection methods for compressors in industrial chillers In industrial chillers, the quality of the compressor determines whether the working efficiency of the chiller is good. At the same time, the compressor also plays an important role器2䀀ￜ皥䖒皦즠Ʋ嫜ི㲈Ʋ䌁皦ᮔǅ༬皧嫦ིЀ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠ƲبǜV /펔B䌁皦 ᮔǅ'鱤ǆၜ먢䇨珵呈ᠾ뤂ᐱ⿇⬿먲僧ᐱ㥲ᐲ�僬㣢ᐲᠾ랖僧ѐ識

Refrigeration compressor configuration application and precautions

06/14/2020

Refrigeration compressor configuration application and precautions

Compressor configuration Generally speaking, semi-hermetic compressors are equipped with: oil filter, oil hole, exhaust with pressure gauge interface, suction cut-off valve, suction filter, sight glass.

Reciprocating compressor

06/14/2020

Reciprocating compressor

Reciprocating compressor refrigerators The last one we want to see is reciprocating compressors. As newer and more efficient technologies have replaced it, this type of refrigerator is becoming less and less common, at least in the field of commercial ref器2䀀ￜ皥䖒皦즠Ʋ嫜ི㲈Ʋ䌁皦ᮔǅ༬皧嫦ིЀ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠ƲبǜV /펔B䌁皦 ᮔǅ'鱤ǆၜ먢䇨珵呈ᠾ뤂ᐱ⿇⬿먲僧ᐱ㥲ᐲ�僬㣢ᐲᠾ랖僧ߜ識�僬㣢ᐲ臆S㥲ᐲᬄğ識理艏S杴識杴㥲ᐲ琉

Over 560,000 kilometers of Kia was overhauled, the air conditioner compressor bubbled, the owner: No wonder the air conditioner is not cool!

06/14/2020

Over 560,000 kilometers of Kia was overhauled, the air conditioner compressor bubbled, the owner: No wonder the air conditioner is not cool!

A few days ago, a Kia Serato came to the store for overhaul. The main problem it had was: the air conditioning was not cool. This makes the car owner unable to drive with peace of mind, the car is too hot! This Kia was shipped in 2013 and is equipped w器2䀀ￜ皥䖒皦즠Ʋ煔क़㲈Ʋ䌁皦ᮔǅ༬皧煞क़Ѐ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠ƲبǜV /펔B䌁皦

Method and procedure of replacing refrigeration compressor

06/14/2020

Method and procedure of replacing refrigeration compressor

1. Cut off the power supply: before replacing the compressor, be sure to cut off the power supply of the unit, otherwise there will be a risk of electric shock. When removing the power supply of the compressor, the identification of each wire and the corr器2䀀ￜ皥䖒皦즠Ʋ嫜ི㲈Ʋ䌁皦ᮔǅ༬皧嫦ིЀ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄

How to judge the quality of single-phase and three-phase refrigeration compressors

06/14/2020

How to judge the quality of single-phase and three-phase refrigeration compressors

A compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas, and is the heart of a refrigeration system. Then, after-sales maintenance sometimes doubts that the compressor is malfunctioning, how to check and judge at this time器2䀀ￜ皥䖒皦즠Ʋ煔क़㲈Ʋ䌁皦ᮔǅ༬皧煞क़Ѐ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥

How to distinguish between original refrigeration compressors and second-hand refrigeration compressors

06/14/2020

How to distinguish between original refrigeration compressors and second-hand refrigeration compressors

How to distinguish between original refrigeration compressors and second-hand refrigeration compressors At present, in order to make huge profits, there are illegal businesses on the market that often use second-hand or refurbished, off-line refrigeratio器2䀀ￜ皥䖒皦즠Ʋ嫜ི㲈Ʋ䌁皦ᮔǅ༬皧嫦ིЀ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠ƲبǜV /펔B䌁皦 ᮔǅ'鱤ǆၜ먢䇨珵呈ᠾ뤂ᐱ⿇⬿먲僧ᐱ㥲ᐲ�僬㣢ᐲᠾ랖僧Ҧ識�僬㣢ᐲ臆S㥲ᐲᬄğ識理艏S杴識杴

Does the amount of refrigerant cause frost in the return air pipe and the compressor

06/14/2020

Does the amount of refrigerant cause frost in the return air pipe and the compressor

As far as air conditioning is concerned, the principle of system circulation is generally the same as that of refrigerators and freezers. The symptoms of air conditioning systems lacking fluoride are similar to refrigerators and freezers. Many people say 器2䀀ￜ皥䖒皦즠Ʋ煔क़㲈Ʋ䌁皦ᮔǅ༬皧煞क़Ѐ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠ƲبǜV /펔B䌁皦 ᮔǅ'鱤ǆၜ먢䇨珵呈ᠾ뤂ᐱ⿇⬿먲僧ᐱ㥲ᐲ�僬㣢ᐲᠾ랖僧՞識�僬㣢ᐲ臆S㥲ᐲᬄğ識理艏S杴識杴㥲ᐲ

Customers frequently viewed

New In stock for sale, IWAYA DENKI Water Pump 25CJT0752

IWAYA DENKI Water Pump 25CJT0752

US$2307.69

New In stock for sale, Panasonic Servo Motor MHMF022L1V2M

Panasonic Servo Motor MHMF022L1V2M

US$653.85

New In stock for sale, Honeywell Solenoid Valve VE4025B1045

Honeywell Solenoid Valve VE4025B1045

US$334.62

New In stock for sale, ROTEN Mechanical Seal 8E5K-22-X

ROTEN Mechanical Seal 8E5K-22-X

US$384.62

New In stock for sale, Bristol Compressor H73A303DBEC

Bristol Compressor H73A303DBEC

Contact Us

New In stock for sale, IKURA Fan U4301B-OT1

IKURA Fan U4301B-OT1

Contact Us

New In stock for sale, LG LS PLC AC Transistor output module G4Q-TR4A

LG LS PLC AC Transistor output module G4Q-TR4A

US$3329.23

New In stock for sale, Bristol Compressor M63B203BBCL

Bristol Compressor M63B203BBCL

Contact Us

New In stock for sale, SMC Proportional Valve ITV2030-312N3

SMC Proportional Valve ITV2030-312N3

US$621.00

New In stock for sale, ULVAC Vacuum Pump PMB1200D-MA4A2S7XXB1

ULVAC Vacuum Pump PMB1200D-MA4A2S7XXB1

Contact Us

New In stock for sale, EXIDE Battery 12N9-4B-1

EXIDE Battery 12N9-4B-1

US$305.91

New In stock for sale, P+F Pepperl Fuchs Sensor SU18-40A/110/115A/126A

P+F Pepperl Fuchs Sensor SU18-40A/110/115A/126A

US$162.76

New In stock for sale, SMC Air Cylinder Pneumatic Cylinder MQQTB28-30D

SMC Air Cylinder Pneumatic Cylinder MQQTB28-30D

US$321.73

New In stock for sale, CAT Piston Pump 2530E

CAT Piston Pump 2530E

US$2307.69

Welcome to O&Kmarts

Is there anything we can help?

Email us
Feedback

© eCommerce. 2017-2025. All Rights Reserved

Press and drag the mouse to start taking a screenshot