SU853359A1

SU853359A1 - Device for measuring radial clearance in bearings

Info

Publication number: SU853359A1
Application number: SU792784417A
Authority: SU
Inventors: Петр Петрович Василенко
Original assignee: Предприятие П/Я Г-4517
Priority date: 1979-06-20
Filing date: 1979-06-20
Publication date: 1981-08-07

Description

(54) УСТРОЙСТВО ДЛЯ ИЗМЕРЕНИЯ РАДИАЛЬНОГО (54) DEVICE FOR MEASURING RADIAL

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Изобретение относитс к измерительной технике и может быть использовано в промьшшенности дл контрол собранных подшипников. The invention relates to a measurement technique and can be used in industry to monitor assembled bearings.

Известно устройство дл -измерени радиального зазора подшипников, содержащее корпус и установленные в нем оправку дл измер емого подшипника , узлы нагружени и плавающую измерительную систему. Измерительна система имеет подвешенный на плсских пружинах подвижный кронштейн, ножка которого через специальный паз в оправке контактирует с внутренним кольцом и следит за его положением , а измерение производитс отсчетным устройством, закрепленным в подвижном кронштейне и контактирукндим с наружным кольцом. Измерение производитс в процессе поочередного нагружени -нару рного кольца подшипника. Благодар слежению -ва положением внутреннего кольца, на результате измерени не сказываютс ни деформаци оправки при нагружении подшипника, ни перемещение внутреннего кольца относительно оправки l J.A device for measuring the radial clearance of bearings is known, comprising a housing and a mandrel mounted therein for the bearing to be measured, loading units and a floating measuring system. The measuring system has a movable bracket suspended on plss springs, the leg of which, through a special groove in the mandrel, contacts the inner ring and monitors its position, and the measurement is carried out with a reading device fixed in the movable bracket and in contact with the outer ring. The measurement is carried out in the process of alternating loading of a -bary bearing ring. Due to tracking -in the position of the inner ring, neither the deformation of the mandrel under loading of the bearing, nor the movement of the inner ring relative to the mandrel l J. affect the measurement result.

Недостатком устройства вл етс невозможность его применени дл ЗАЗОРА.ПОДШИПНИКОВThe disadvantage of the device is the impossibility of its use for CLEARANCE.

подшипников малых размеров, особенно микроподшипников.bearings of small sizes, especially micro bearings.

Наиболее близким к изобретению по техйической сущности вл етс устройство дл измерени радиального зазора подшипников, содержащее кррпус, в котором размещены оправка дл установки и закреплени подшипника , подвижные в направлении, The closest to the invention in terms of technical essence is a device for measuring the radial clearance of bearings, comprising an armature, in which a mandrel for mounting and fixing a bearing is placed, movable in the direction

10 перпендикул рном оси оправки, соосно расположенные штоки, механизмы нагружени штоков, измеритель линейных перемещений, контактирующий с одним из штоков, и механизм компенсации систематических погрешностей.10 perpendicular to the axis of the mandrel, coaxially arranged rods, mechanisms for loading rods, a gauge of linear displacements in contact with one of the rods, and a mechanism for compensating for systematic errors.

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Механизм компенсации систематических погрешностей выполнен в виде привода, воздействующего на подпружиненный рычаг, на котором в корпусе установлен измеритель линейных The mechanism of compensation of systematic errors is made in the form of a drive acting on a spring-loaded lever, on which a linear meter is installed in the case.

20 перемещений, и периодически измен положени последнего дл комденсации систематических погрешностей 2.20 movements, and periodically changing the position of the latter to compensate for systematic errors. 2.

Не;аостатком данного устройства Not; a balance of this device

25 вл етс его низка надежность вследствие износа в местах контакта деталей привода и подпружиненного рычага.25 is its low reliability due to wear at the contact points of the drive components and the spring-loaded lever.

Целью изобретени вл етс повышение надежности устройства.The aim of the invention is to increase the reliability of the device.

Claims

30 This goal is achieved by the fact that the systematic error compensation mechanism is made in the form of a lever, which is elastically mounted on one of the rods and interacts with the rod loading mechanism and the linear displacement meter, and the linear displacement meter is installed in the housing so that it can move along the lever. The drawing shows the proposed device, a longitudinal section. The device includes a housing 1, in which a mandrel 2 is placed, which serves to install and fix a bearing 3, movable rods 4 and 5 with their loading mechanisms 6 and 7, respectively, a holder 8 with a meter 9 linear displacements having the possibility of adjusting movement along its axis. The mechanism of compensation of the systematic error is made in the form of a lever 10, elastically mounted on the rod 4. Mechanism 6 and the meter 9 of the linear displacements interact with the surface of the lever 10. The device works as follows. The reference set {hard washer, on the hell, not shown) is established in the test 2. To compensate for the systematic error caused by the bend of the mandrel when measuring the radial clearance of the bearing, the hard ball is alternately loaded with moving rods 4 and 5 by acting on them with loading mechanisms. By this movement of the holder 8 with the meter 9 linear movements, the position of the contact point of the meter 9 with the lever 10 which is elastically mounted is established, at which the reading remains unchanged when the rigid washer is alternately loaded. The system error caused by the deformation of the outer ring underestimates the radial clearance measurement result. Its value is usually known and is selected from tables compiled on the basis of calculated or experimental data. Therefore, to compensate for this error by moving the holder 8, the contact point of gauge 9 is set by lever 10, in which the difference between the readings of the linear displacement gauge and alternately loading the rigid washer would be equal to the deformation of the outer ring and indicate the presence of a radial gap. Then, having installed a controlled bearing 3 instead of a rigid washer, alternately load its outer ring with rods 4 and 5, and the direct value of the radial clearance is determined from the difference in readings. Thus, the proposed design of the mechanism of compensation of systematic errors, based on the introduction of an elastic link in the measuring circuit, provides increased reliability of the device. Claims An apparatus for measuring a radial clearance of bearings, comprising a housing in which a mandrel for mounting and fixing a bearing is placed, movable in a direction perpendicular to the axis of the mandrel, coaxially arranged rods, piston loading mechanisms, a linear displacement gauge in contact with one of the rods, and the mechanism of compensation of systematic errors, characterized in that, in order to increase the reliability of the device, the mechanism of compensation of systematic errors is made in the form of a lever, mounted elastically on one of the rods and interacting with the rod loading mechanism and linear displacement meter, and the linear displacement meter is installed in the housing with the possibility of movement along the lever. Sources of information taken into account during the examination 1. Device mod. KRZ-74. Prospect GPZ-8 at the Exhibition of Economic Achievements Podshipnikova industry - the national economy, 1976.

2. Device mod. KZH. Scientific and Technical Report Investigation of devices of the KZH model for monitoring the radial clearance of instrument bearings. Zagorsk, ZF. VNIIPI, 1974 (prototype) ..