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introduction：For a dry transformer，The so-called balance voltage of the relay，It is the voltage that keeps the relay from operating。It can be done by setting an adjustable resistor in the voltage sensing circuit of the voltage relay，To achieve the purpose of pre-setting balanced voltage。In this way，The voltage value of the adjustable range of the resistor can be preset。 Dry transformers usually need to maintain the remote bus voltage at a fixed level。When the line voltage drop increases due to increased load，A line voltage compensation device consisting of an adjustable resistor and a reactor with tap-tap can be used，Connect the reactor to the secondary side of a current transformer，The current flowing through the primary side of the current transformer is the load current。By appropriate adjustment of resistor and reactor parameters，It depends on the characteristics of the line，It is possible to maintain a constant voltage at a certain point in the system，Without having to consider the load and power factor changes。 Metho
2018-03-05 Reading quantity 324
introduction：Solid-state relay action Solid-state relays use a light-emitting diode（LED）An optical coupler composed of a light-emitting element and an optical receiving element such as a photocrystal，Trigger silicon controlled rectifier(SCR)Or bidirectional silicon-controlled rectifier（TRIAC），So low pressure is acceptable(DCorAC)Signal input，And drive high voltage output，It has the effect of isolating input and output and controlling high power output
2018-02-27 Reading quantity 150
introduction：The lubrication points of machine tools are many and complex，And there are many plastic tow chains lubricated at the same time，Therefore, automatic lubrication is often used，Also known as forced circulation lubrication，To save manpower，And ensure reliable lubrication。 Plastic drag chain is the key and difficult point of machine tool lubrication，The movement of the guide rail is repeated，And the speed and load vary greatly。 one、Plastic drag chain is the key and difficult point of machine tool lubrication，The movement of the guide rail is repeated，And the speed and load vary greatly，Prone to crawling，The machining accuracy is reduced and even the machine tool accessories are scrapped。Therefore, when selecting lubricating oil early, we should consider the appropriate viscosity and good climbing resistance of lubricating oil。
2018-02-24 Reading quantity 237
introduction：The electric lubrication pump should be able to supply oil continuously，The overlap coefficient of gear meshing is requiredeGreater than1，That is, when a pair of gears are not yet out of mesh，The other pair of gears are engaged，In this way，There is a moment when two pairs of gears are engaged at the same time，A closed volume is formed between the tooth flank meshing lines of the two pairs of gears，Some of the oil is trapped in this closed volume，When the gear rotates continuously，This enclosed volume is gradually reduced，When the two meshing points are in symmetrical positions on both sides of the node，The closed volume is small，When the gears continue to turn，The enclosed volume gradually increases，Until the volume becomes large again。In closed volume reduction hours，The trapped oil is squeezed，Pressure surge，The bearing is suddenly subjected to a large impact load，Make the pump vibrate violently，The high-pressure oil then squeezes out of any crevices that might leak，Cause power loss，To heat the oil, etc。
2018-02-24 Reading quantity 258
introduction：Used for textile machine lubricating oil series：Mineral gear oil、Synthetic gear oil、Textile engine oil、grease、Air compressor oil、Hydraulic oil。Which knitting oil is specially designed for cylinder knitting machines、Large disc machine、Hosiery machine、Glove braiding machine and all knitting machine developed。Counter knitting needle、The settler plate and CAM box play a good role in lubrication and protection，Reduce needle consumption；Good cleaning performance can reduce the secondary distribution caused by oil pollution。
2018-02-05 Reading quantity 284
introduction：The steel ball of the index plate is pressed with the above structure，How much torque it can withstand，Further tests are needed。(At present, from the actual use of the situation，The device can achieve relatively high indexing accuracy for grinding small holes of equal division precision line engraving drill)，Cutting with high torque or impact force，This dial is not appropriate。
2018-02-02 Reading quantity 434
introduction：For a high-precision instrument like a divider，Rust is a big problem after a long time，This will affect the performance of the splitter large reasons，So how can we do rust prevention?Next, follow the footsteps of Xiaobian to take a look below。 First of all，We need to know if the surface of the divider is machined，We can make it smooth and shiny，Do this anti-rust treatment。secondly，Under normal circumstances，Need to keep the divider clean。 The divider needs to be cleaned regularly，Loosen the output sleeve first，Removal of output shaft，Do not loosen the rear gland at the same time，Only the lock nut is required for rear loading，Ensure the seal of the divider flange。
2018-02-01 Reading quantity 181
introduction：Home circuit breakers and leakage switches can sometimes be good and bad，We dont know for sure if the circuit breaker is good or bad，So analyze the cause of electrical failure to find out the problem。The following small series will Delixi electric often failure reasons listed one by one！
2018-01-31 Reading quantity 356
introduction：The low-voltage switch is also called the refrigerant leak detection switch，The contact is normally closed contact，It is connected in series with the electromagnetic clutch coil circuit of the air conditioning compressor。The function of the low pressure switch is a severe shortage of refrigerant in the refrigeration system、When the high pressure side pressure is lower than a certain value，Disconnect the contact，Cut the solenoid clutch coil circuit so that the compressor cannot operate，Prevent the compressor from running without lubrication protection and damage。
2018-01-30 Reading quantity 223
introduction：one、Working principle of automatic water filling controller： When the two conditions of water shortage and water well are met at the same time，The pump starts.，The pump now draws water from the well to the pool，Until the pool is full or the well is dry，The pump stops working，Due to water The well has only one water level switch，Be set with0-30Adjustable delay of minutes，To prevent the well from pumping water，Frequent startup phenomenon that stops when there is no water。That is, when the water level switch of the well determines that there is water，The connected pump will not be immediately activate，It starts after a delay of some time。
2018-01-30 Reading quantity 342
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