SU838474A1

SU838474A1 - Torque loading device

Info

Publication number: SU838474A1
Application number: SU792762042A
Authority: SU
Inventors: Вячеслав Алексеевич Крюков; Владимир Алексеевич Сошников; Николай Степанович Чаленко
Original assignee: Предприятие П/Я А-1891
Priority date: 1979-04-28
Filing date: 1979-04-28
Publication date: 1981-06-15

Description

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Изобретение относитс к измерительной технике и может быть использовано дл градуировки моментомеров.The invention relates to measurement technology and can be used for the calibration of torque meters.

Известны устройства дл нагружени крут щих моментов, содержащие основание , узел нагружени моментом VIJDevices for torque loading are known, comprising a base, a loading unit with a torque VIJ

ОднагКо эти устройства не обеспечивают требуемой точности.However, these devices do not provide the required accuracy.

Наиболее близким по технической сущности к изобретению вл етс устройство дл нагружени крут щим моментом , содержащее основание, узел нагружени моментом с грузами, узел осевой разгрузки испытуемого прибора и индикатор 2.The closest to the technical essence of the invention is a device for loading with a torque, comprising a base, a loading unit with loads with loads, an axial unloading unit for the device under test, and an indicator 2.

Это устройство не обеспечивает требуемой точности нагружени крут щим моментом и имеет ограниченный нижний диапазон нагружени .This device does not provide the required accuracy of torque loading and has a limited lower loading range.

Цель изобретени - повышени точности нагружени и расширение нижнего диапаз.она нагружени .The purpose of the invention is to increase the loading accuracy and the expansion of the lower loading range.

Указанна цель достигаетс тем, что в устройстве узел нагружени выполнен в виде винтовой гидростатической пары, гайка которой закреплена неподвижно в основании, винт нижним концом соединен с грузами, а верхним концом с одним элементом св зи с градуируемым прибором, при этом узелThis goal is achieved by the fact that in the device the loading unit is made in the form of a screw hydrostatic pair, the nut of which is fixed at the base, the screw is connected to the lower end with weights, and the upper end with one communication element to the calibrated device, while the node

осевой разгрузки выполнен в виде мембранного узла с жестким центром, св занного через подвижные кронштейны с основаниемj прнчем верхний конец жесткого центра контактирует с индикатором, а нижний св зан с другим элементом св зи с градуируемым приборюм.axial unloading is made in the form of a membrane assembly with a rigid center, connected via movable arms with a base; the upper end of the rigid center is in contact with the indicator, and the lower end is connected with another communication element to the calibrated instrument.

На чертеже представлена схема уст0 ройства дл нагружени крут щим моментом .The drawing shows a diagram of a device for loading with a torque.

Устройство состоит из основани 1, узла нагружени моментом,- состо щего из винта 2 винтовой пары, взвешен5 ного в гайке 3. Гайка 3 неподвижно размещена в основании ,1 устройства. Грузы 4, с помощью которых задаетс величина крут щего момента, закрепл ютс на нижнем конце винта 2. К The device consists of a base 1, a torque loading unit, a screw pair consisting of a screw 2, suspended in a nut 3. A nut 3 is fixedly placed in the base, 1 of the device. Loads 4, which are used to set the magnitude of the torque, are fixed at the lower end of the screw 2. K

0 верхнему концу винта 2 через один из элементов св зи (зажима) 5 крепитс гргщуируемый прибор 6. Узел осевой разгрузки состоит из мембран 7 с жестким центром 8, св занных 0 the upper end of the screw 2 is fastened via one of the communication elements (clamps) 5, the mounting device 6 is attached. The axial unloading unit consists of membranes 7 with a rigid center 8 connected

Claims

5 With the base 1 through the movable brackets 9 with screws 10. The upper end of the rigid center 8 contacts with the indicator 11, and the lower end with the other communication element 5 with the smart device. The device works as follows. Indicator 11 is set to zero. The screw 2 is released from the weights 4, the graduated bolt is secured with one of the clamps 5 on the screw 2 and unscrewed with it to the contact with the rigid center 8. In this position, the calibrated instrument 6 is attached with another clamp5 to the rigid The center 8. When the screw 2 is released, it makes rotational and linear movement, while the calibrated device 6 is acted upon by a rotational moment, under the action of which the calibrated device 6 and the membrane 7 are deformed, and the indicator 11 goes off from the zero position. To eliminate the error introduced by the deformation of the membranes 7, using screws 10 for moving the membranes 7, the indicator 11 is set to zero position. In this position, the readings from the calibrated instrument b are removed. A certain amount is applied to the screw 2 to change the torque value cargo 4, when applying cargo 4 to screw 2, it is necessary to bring indicator 11 to zero position with screws 10, When the speed of movement of screw 2 relative to nut 3 ra is zero, then the external friction force is to zero. The torque moment is determined from the expression: .. (where g is the acceleration of free fall h - Шс1г of the screw pair thread; i.e. the mass of the screw; t is the mass of additional weights. From the expression (1), the relative reproduction error of the torque is: T - () Vw and lUg-I Choosing the values of h, m. It is possible to increase the torque loading accuracy by several orders of magnitude and extend the playback range to the lower side. Invention Apparatus for loading torque with a load-bearing unit knot o Sowing discharge of the test instrument and indicator, characterized in that, in order to increase accuracy and expand the lower loading range, the loading unit is designed as a hydrostatic screw pair, the nut of which is fixed at the base, the screw with the lower end is connected to the weights, and the upper end with one the element of communication with the calibrated device, while the axial unloading unit is made in the form of a membrane unit with a rigid center connected to the base through movable brackets, the upper end of the rigid center contact ruet indicator, and the lower member connected to the other communication device with .graduiruemym. Sources of information taken into account in examination 1, GDR patent No. 103720, Cl, 42 K 7/05, 1974, 2, Ouspensky V., V., et al. Current state and prospects for the development of torque measurement tools, State Standard USSR, Sverdlovsk branch of VNIIM, a series of Metrologists and measuring equipment, m., 1974, p., 41 prototype).

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