SU779641A1

SU779641A1 - Method of determining volumetric efficiency of hydraulic machine

Info

Publication number: SU779641A1
Application number: SU782614084A
Authority: SU
Inventors: Генрих Исаакович Левин; Владимир Николаевич Бугриенко
Original assignee: Предприятие П/Я А-1697
Priority date: 1978-05-05
Filing date: 1978-05-05
Publication date: 1980-11-15

Description

Изобретение относится к машиностроительной гидравлике, в частности к способам определения объемного коэффициента полезного действия гид• Ромашины и может быть использовано 5 промышленными организациями при проектировании и изготовлении объемного гидропривода..The invention relates to mechanical engineering hydraulics, in particular to methods for determining the volumetric efficiency of a guide • Chamomile and can be used by 5 industrial organizations in the design and manufacture of a volumetric hydraulic actuator ..

Известен способ определения объемного коэффициента полезного действия *0 гидромашины путем заполнения подключенной к последней мерной емкости и измерения числа рабочих циклов прибором fl] .A known method for determining the volumetric efficiency * 0 of a hydraulic machine by filling connected to the last measured capacity and measuring the number of operating cycles with the device fl].

Недостаток известного способа сос-15 тоит в том, интересующий испытателя результат не воспроизводится прибором, а для его получения требуется вычисление.The disadvantage of the known method is that the result of interest to the tester is not reproduced by the device, but calculation is required to obtain it.

Цель изобретения — упрощение опре- 20 деления КПД путем регистрации величины объемных потерь прибором. .The purpose of the invention is to simplify the determination of efficiency by registering the volume losses of the device. .

Указанная цель достигается тем, что число рабочих циклов гидромашины измеряют без нагрузки и с нагруз- 25 кой до заполнения мерной емкости, величину объема которой устанавливают равной рабочему объему гидромашины, увеличенному в 100^п раз, где я целое число больше единицы.This object is achieved in that the number of working cycles hydromachine measured without load and with nagruz- 25 Coy before filling volumetric capacitance value which is set equal to the volume of the hydraulic working volume, increased 100 ⁿ times, where i is an integer greater than one.

На чертеже представлена схема устройства для осуществления способа.The drawing shows a diagram of a device for implementing the method.

Устройство содержит насос 1, приводимый от электродвигателя 2, снабженного прибором 3 фиксирования числа рабочих циклов, нагрузочное устройство 4, распределитель 5 с электроуправлением, мерную емкость 6, бак для забора рабочей жидкости. Мерная емкость б снабжена датчиками и 9 начального и конечного уровня. Датчики 8 и 9 представляют собой пару источник направленного инфракрасного излучения и фотоприемник (на чертеже не показаны). Разрешающая способность датчиков 8, 9 позволяет фиксировать уровень жидкости с точностью до 1 мм. Сигналы датчиков 8, 9 поступают на управляющие входы прибора 3 фиксирования числа рабочих циклов и разрешают или останавливают счёт импульсов, Соответствующих количеству рабочих циклов насоса 1. Для обеспечения высокой разрешающей способности и точности способа во время каждого рабочего цикла -на прибор 3 фиксирования числа рабочих циклов поступает 100 ймлульсов, т.е. циклы отсчитываются ³ с точностью + 3,6° угла поворота вала насоса 1. Во время определения КПД насоса 1 устанавливают требуемый скоростной режим', нагрузочное устройство 4 закрыто. Через распределитель 5 рабочая жидкость подается в мерную емкость 6. При достижении Жидкостью уровня датчика 8 начинается счет рабочихциклов; при достиЖёнйй ’жидкостью верхнего уровня датчик 9 счет прекращает. На приборе 3 фиксируется число рабочих циклов, обесп'ечивающйх. заполнение жидкостью мерной емкости 6, объем которой установлен большим, чем рабочий объем насоса 1 в 100^п раз, гден число больше единицы.The device comprises a pump 1, driven by an electric motor 2, equipped with a device 3 for fixing the number of operating cycles, a load device 4, a distributor 5 with electric control, a measuring tank 6, a tank for collecting the working fluid. Measured tank used with sensors and 9 entry and end levels. Sensors 8 and 9 are a pair of directional infrared radiation source and a photodetector (not shown in the drawing). The resolution of the sensors 8, 9 allows you to record the liquid level with an accuracy of 1 mm. The signals of the sensors 8, 9 are fed to the control inputs of the device 3 for fixing the number of operating cycles and enable or stop the pulse counts corresponding to the number of operating cycles of the pump 1. To ensure high resolution and accuracy of the method during each working cycle, the device 3 for fixing the number of operating cycles 100 ymls are received, i.e. cycles are counted ³ with an accuracy of + 3.6 ° the angle of rotation of the shaft of the pump 1. During determination of the efficiency of the pump 1 set the desired speed mode ', the load device 4 is closed. Through the dispenser 5, the working fluid is supplied to the measuring tank 6. When the Liquid reaches the level of the sensor 8, the counting of working cycles begins; when the liquid reaches the upper level, the sensor 9 stops counting. On the device 3 is fixed the number of duty cycles, providing. filling liquid with a measuring tank 6, the volume of which is set greater than the working volume of the pump 1 in 100 ^p times, where the number is greater than one.

После этого нагрузочное устройство 4 закрывают, создавая требуемое давление в полостях насоса 1. Распределителем 5 подают рабочую жидкость в мерную емкость 6. При достижении жидкостью уровня датчика 8, начинается сче.т рабочих циклов, при достижении .жидкостью верхнего уровня, датчик 9 счет прекращает. На приборе 3 фиксируется число рабочих циклов, большее Прежнего значения на некоторое число, равное величине объемных потерь, т.е.After that, the load device 4 is closed, creating the required pressure in the cavities of the pump 1. Dispenser 5 serves the working fluid in the measuring tank 6. When the fluid reaches the level of the sensor 8, it starts counting working cycles, when the fluid reaches the upper level, the sensor 9 stops counting . On the device 3, the number of operating cycles is fixed, greater than the previous value by a certain number equal to the volume loss, i.e.

разнице КПД испытываемого насоса и 1 в процентах.the difference in the efficiency of the tested pump and 1 in percent.

Изобретение обеспечивает снижение трудоемкости определения объемного КПД гидромашины.The invention reduces the complexity of determining the volumetric efficiency of a hydraulic machine.

Claims

The invention relates to engineering hydraulics, in particular to methods for determining the volumetric efficiency coefficient Romashyn's guide and can be used by industrial organizations in the design and manufacture of a hydraulic drive .... . There is a known method for determining the volume of whom the efficiency of a hydraulic machine is by filling the measuring vessel connected to the last measuring capacitance and measuring the number of operating cycles of 60PQM fl. The disadvantage of this method is in that the result of interest is not reproduced by the instrument, but a calculation is required to obtain it. The purpose of the invention is to prevent the determination of efficiency by recording the volume loss by the instrument. . This goal is achieved by the fact that the number of working cycles of the hydraulic machine is measured without load and with load until the measuring capacity is filled, the volume of which is set equal to 12 working volume of hydraulic junction increased 100 times, where h is an integer greater than ALINICE. The drawing shows a diagram of an apparatus for carrying out the method. The device comprises a pump 1 driven by an electric motor 2 equipped with a device 3 for fixing the number of operating cycles, a loading device 4, a distributor 5 with electric control, a measuring tank 6, a tank 7 for collecting the working fluid. Measuring container 6 is equipped with sensors 8 and 9 of the initial and final level. Sensors 8 and 9 are a pair of directional infrared radiation source and a photodetector (not shown). The resolvability of the sensors 8, 9 allows the level of the liquid to be recorded with an accuracy of 1 mm. The signals of the sensors 8, 9 are fed to the control inputs of the device 3 fixing the number of operating cycles and allow or stop the counting of pulses corresponding to the number of operating cycles of the pump 1. To ensure high resolution of the ability and accuracy of the method during each working cycle - on the device 3 fixing the number of operating The cycles receive 100 images, i.e. the cycles are counted with an accuracy of + 3.6 of the angle of rotation of the shaft of the pump 1. During the determination of the efficiency of the pump 1, the required speed mode is set, the load device 4 is closed. Through the distribution box 5, the working fluid is supplied to the measuring tank 6. When the Liquid reaches the level of the sensor 8, the run Cycles begins to count; when the liquid reaches the upper level, the sensor 9 stops counting. On Pribr 3, the number of operating cycles is recorded, obsTGyo giVago1dyh. liquid filling of the measuring tank 6, the volume of which is set larger than the working volume of pump 1 is 100 times, where the number is more than one. After this, the load devices 4 are closed, creating the required pressure in the cavities of pump 1. The distributor 5 sells the working fluid to measuring tank 6. When the liquid reaches the level of sensor 8, it begins, t cycles, when it reaches. liquid top level sensor 9 stops counting. The device 3 records the number of operating cycles greater than the previous value by a certain number equal to the value of the volume losses, i.e. the difference in efficiency of the test pump and 1 in percent. The invention provides a reduction in the laboriousness of determining the volumetric efficiency of a hydraulic machine. Claim Formula. " The method of determining the volumetric efficiency of a hydraulic machine by filling a measuring device connected to the last capacitance and measuring the number of operating cycles with an instrument, characterized in that, in order to simplify the determination of efficiency by recording the amount of volumetric losses by the instrument, the number of operating cycles of the hydraulic machine filling the measured capacity, the volume of which is set equal to the working volume of the hydraulic machine, increased by 100 times, where the integer number is greater than one. Sources of information taken into account during the examination 1. GOST 17335-71 Pumps volumetric test methods, p. nineteen.