SU917012A1

SU917012A1 - Device for measuring axial force

Info

Publication number: SU917012A1
Application number: SU802904233A
Authority: SU
Inventors: Вячеслав Иванович Лагутин; Юлий Семенович Максимов; Валерия Ивановна Старшинова
Original assignee: Предприятие П/Я М-5539
Priority date: 1980-04-03
Filing date: 1980-04-03
Publication date: 1982-03-30

Description

(54) УСТРОЙСТВО ДЛЯ ИЗМЕРЕНИЯ ОСЕВОЙ СИЛЫ(54) DEVICE FOR MEASURING AXIAL FORCE

Изобретение относитс к измерительной технике и может быть использовано , например, при измерении осевой (продольной) силы, действующей на модель, помещенную в поток аэродинамической трубы.The invention relates to a measurement technique and can be used, for example, in measuring the axial (longitudinal) force acting on a model placed in a wind tunnel flow.

Известны устройства дл измерени сил в аэродинамических установках, содержащие крестообразные пластины с ободом дл замера осевой силы и пластины дл замера подъемной силы, расположенные между крестообразными пластинами и соединенные с державкой 1.Devices for measuring forces in aerodynamic installations are known, comprising cross-shaped plates with a rim for measuring axial force and plates for measuring lifting force located between the cross-shaped plates and connected to the holder 1.

Однако данные устройства не обладают достаточной прочностью и жесткостью , так как имеют один диск с крестообразными пластинами. Кроме того, они имеют узкий диапазон измерений .However, these devices do not have sufficient strength and rigidity, as they have one disk with cross-shaped plates. In addition, they have a narrow measurement range.

Наиболее близким по технической сущности к изобретению Ьл етс устройство дл измерени осевой силы, содержащее коаксиально расположенные державку, поршень, втулку и измерительные элементы, выполненные в виде дисков с радиальными пластинами , на которых размещены тензодатчики 2.The closest to the technical essence of the invention is a device for measuring axial force, containing coaxially arranged holder, piston, sleeve and measuring elements, made in the form of disks with radial plates, on which strain gages 2 are placed.

Недостатками известной конструкции вл ютс ограниченный диапазон измерений и невысока точность.The disadvantages of the known construction are the limited range of measurements and low accuracy.

Цель изобретени - расширение диапазона измерений и повышение точности .The purpose of the invention is to expand the measurement range and improve accuracy.

Поставленна цель достигаетс тем, что в устройство .введены гайка с упором на торце, установленна на The goal is achieved by the fact that a nut with an emphasis on the end is inserted into the device, mounted on

10 втулке, и дополнительный измерительный элемент, размещенный параллельно одному из основных и выполненный в виде диска с радиальными пластинами , установленными консольно и 10 bushing, and an additional measuring element placed parallel to one of the main ones and made in the form of a disk with radial plates mounted cantilever and

15 контактирующими с упором, на которых расположены тензодатчики, причем измерительные элементы закреплены на порине и имеют различную жесткость .15 contacting with the stop, on which strain gauges are located, and the measuring elements are fixed on the porin and have different stiffness.

2020

Кроме того, основные измерительные элементы повернуты относительно друг друга на заданный угол.In addition, the main measuring elements are rotated relative to each other at a given angle.

На фиг. 1 представлено устройство дл измерени осевой силы, общий FIG. 1 shows an apparatus for measuring axial force, total

25 вид; на фиг. 2 - разрез А-А на фиг.1; на фиг. 3 - разрез Б-Б на фиг. I; на фиг. 4 - узел I на фиг. Ij на фиг. 5 - узел II на фиг. 1; на фиг.б|Измерительный элемент (диск), общий 1вид; на фиг. 7 - то же, вид Ьверху25 species; in fig. 2 shows a section A-A in FIG. in fig. 3 shows a section BB in FIG. I; in fig. 4 — node I in FIG. Ij in FIG. 5 — node II in FIG. one; in figb | Measuring element (disk), total 1vid; in fig. 7 - the same, view b above

Claims

30 in FIG. 8 - additional measuring element (disk); in fig. 9 - the same, top view. The device contains a piston 1, on which the model 2 is installed, connected to the sleeve 3 through thin-walled measuring elements 4 and 5 in the form of discs, made with the outer ring 6 and the inner 7, between which radial plates 8 are installed. The disks 4 and 5 are rigidly fixed along the ends of the piston 1. The inner rings 7 of the disks 4 and 5 are attached to the sleeve 3 with the help of the spacer holder 9 and the nuts U placed on the sleeve 3. The disk 5 is installed at a distance from the end of the piston 1 and fixed with the help of petals 11 cut from piston body 1, by rolling them and the outer ring b of the disk 5. Parallel to the disk 5, the measuring element in the form of a disk 12 with the outer ring 13 and the collar 14 is mounted on the end face of the piston 1, and the disk 12 is also fixed on the end of the front 1, as well as the disk 5, i.e. rolled by the front crown of the piston 1. The disk 12 can be made with two or more plates 15, symmetrically located with respect to the longitudinal axis of the pores n 1, cantilever-mounted to the outer ring 13 of the disk 12. Tension sensors 16 are glued to the disks 4.5 and 12. S radial plates 8 and 14 of the disks 4.5 and 12, respectively, may be different depending on the goal. To regulate the measurement range, a nut 17 is placed on the sleeve 3, and an end 18 is made on its end, for example, in the form of a pointed ring bushing, which is fastened with a lock nut 19. The stop 18 of the nut 17 is in contact with the plates 15 of the disk 12. , disks 4.5 and 12 and nuts 10,17 and 19 are placed on the holder 20 with nuts 21 and 22. To increase rigidity in the radial direction, disks 4 and 5 are offset relative to each other, for example, by an angle of 45. The device works as follows. The model 2 is preliminarily attached to the piston 1, the holder 20 is installed in the suspension of the working part of the aero dynamic pipe. The wires from the strain gauges 16 are withdrawn through the holder 20 to the registered equipment, and prior to installing the device in a wind tunnel, it is calibrated on a special stand for the expected loads, and the nut 17 with an emphasis 18 is placed with the required clearance relative to the plates 16 of the disk 12. Fasten nut 17 with lock nut 19 in position. After supplying the work flow to the model 2, the piston 1 will begin to move from left to right. The radial plates 8 of the disks 4 and 5 bend under the effect of the load, the load cells 16 pick up a signal to the recording equipment with a record on a recorder. After increasing the load on the model 2, the gap between the stop 18 and the plates 16 disappears due to the deflection of the radial plates 8 of the disks 4 and 5 and then the plates 16 of the disk 12 begin to work for a new large load with recording to the equipment. The loads are decoded and compared with the graded loads, after which the actual loads acting on the model are recorded. Thus, the proposed device allows to increase the accuracy of measurements, significantly expand the range of measured loads, and conduct tests on both single-piece models and their component parts (elements). Claim 1. Device for measuring axial force, containing coaxially arranged holder, piston, bushing and measuring elements made in the form of disks with radial plates, on which strain gauges are placed, characterized in that, in order to expand the range of measurements and improve accuracy, He introduced a nut with an emphasis on the end, mounted on the sleeve, and an additional measuring element placed parallel to one of the main ones and made in the form of a disk with radial plates installed onsolno and in contact with an abutment on which the strain gauges, and measuring elements are fixed to the piston and having different stiffness 2.Ustroystvo claim. 1, characterized in that the main measuring elements are rotated relative to each other by a predetermined angle. Sources of information taken into account during the examination 1. USSR author's certificate 344313, cl. G 01 M 9 / 00,18.01.71.

2. Authors certificate of the USSR 542926, cl. G OJ L 5/16,12.04.74 (prototype).

10 If

A-A

Bb

"4.5 Fig. $. Fig.7 Fig.9, $