SU964516A1

SU964516A1 - Device for testing bearings state

Info

Publication number: SU964516A1
Application number: SU813254995A
Authority: SU
Inventors: Сергей Николаевич Салищев; Сергей Фердинандович Корндорф; Константин Валентинович Подмастерьев
Original assignee: Орловский Филиал Всесоюзного Заочного Машиностроительного Института
Priority date: 1981-03-04
Filing date: 1981-03-04
Publication date: 1982-10-07

Description

Изобретение относитс к измерительной технике и может быть использовано преимущественно в подшипниковой про1иышленности.This invention relates to a measurement technique and can be used primarily in the bearing industry.

Известно устройство дл контрол состо ни подшипников, основанное на изменении омического сопротивлени масл ной пленки в подшипниках, представл ющее собой электрическую цепь, содержащую токосъемники, регистрирукндую аппаратуру, контролируемый подшипник, включенный как сопротивление ,, и блок питани 1.A device for monitoring the condition of bearings is known, based on a change in the ohmic resistance of an oil film in bearings, which is an electrical circuit containing current collectors, recording equipment, a controlled bearing connected as a resistance, and a power supply unit 1.

Недостатком указанного устройства вл етс непосто нство сопротивлени перехода контакт-вал, которое электрически последовательно включено в измерительную, цепь и, следовательно , непосредственно вли ет на результаты измерений. На сопротивление перехода оказывают вли ние окисление и загр знение трущихс поверхностей , неточность геометрической формы : контактов и вибраци вала.The disadvantage of this device is the inconvenience of the contact-shaft junction resistance, which is electrically connected in series to the measuring circuit and, therefore, directly affects the measurement results. The resistance of the transition is affected by the oxidation and contamination of the rubbing surfaces, the inaccuracy of the geometry: contacts and shaft vibration.

Таким обра:зом, наличие трущихс деталей снижает надежность работы устройства, а непосто нство переходного сопротивлени контакт-вал вносит погрешность в измерени .Thus, the presence of labor parts reduces the reliability of the device, and the inconvenience of the contact-shaft transient resistance introduces an error in the measurement.

Целью изобретени вл етс повышение точности измерени за счет исключени твердых трущихс деталей, обеспечивающих электрический контакт с валом.The aim of the invention is to improve the measurement accuracy by eliminating solid wiper parts providing electrical contact with the shaft.

Указанна цель достигаетс тем, что в устройстве дл контрол состо ни подшипников, содержащем смонтированные на основании вал дл ус10 тановки контролируемого подшипника, запитывающее устройство и измерительный Прибор, одна клемма которого через запитывающее устройство соединена с валом, а друга расположена This goal is achieved by the fact that in a device for monitoring the state of bearings, comprising a shaft mounted on a base for mounting a monitored bearing, a powering device and a measuring device, one terminal of which is connected to the shaft through a powering device

15 с возможностью соединени с неподвижным кольцом контролируемого подшипника , запитывающее устройство выполнено в виде заполненного жидким электролитом цилиндрического сосуда с 15 with the possibility of connecting to a stationary ring of a controlled bearing, the powering device is made in the form of a cylindrical vessel filled with liquid electrolyte

20 крышкой, в которой закреплен неподвижно электрод, при этом дно сосуда жестко соединено с торцом вала, крышка закреплена на основании .устройства , а электрод, погруженный в элект25 ролит, электрически св зан с измерительным прибором.20 with a lid in which the electrode is fixed, the bottom of the vessel is rigidly connected to the shaft end, the lid is fixed on the base of the device, and the electrode immersed in the electric roller is electrically connected to the measuring device.

Claims

Such an embodiment of the device provides an increase in the reliability of its operation, since it does not have a solid breathing parts. The amount of internal resistance is practically not affected by the inaccuracy of the geometric shape of the shaft, its beating. The electrode and the inner surface of the vessel are constantly in contact with the electrolyte, so the chemical reaction proceeds continuously. The mixing of the electrolyte due to the rotation of the vessel and the disturbance introduced by the stationary electrode immersed in the electrolyte creates the necessary conditions for stable operation of the device. As a result, the measurement accuracy is increased by increasing the stability of the internal resistance of the powering device. The drawing shows the device a General view. The device contains a shaft 1, to which the vessel 2 is rigidly connected, filled with electrolyte 3. The outer ring of the monitored bearing 4 mounted on the shaft is fixedly mounted on the base of the device 5. The cover 6 with the electrode 7 partially immersed in the electrolyte with the help of a bracket 8 and the insulating column 9 are also fixed on the base of the device. The measuring device 10 is connected to the bracket and to the base of the device. The cover b has a glass-like shape. Moreover, the diameter of the lid is greater than the diameter of the neck of the vessel

2. Such a design of the lid and vessel allows the assembly to create a labyrin which eliminates mechanical friction between these parts and prevents electrolyte from splashing during operation of the device. When the vessel 2, which is rigidly connected to the shaft 1, rotates, the liquid electrolyte 3 under the action of centrifugal forces is distributed along the walls of the vessel. Electrode 7 and vessel 2 are made of metals that form an electroplating pair with a given potential difference in the medium of the selected electrolyte 3, which from the vessel through shaft 1 and from the electrode through bracket 8, measuring device 10 and base 5 are supplied to the rings of the bearing to be tested. The gauge determines the amount of current in the circuit. Due to the absence of solid rubbing contacts and the stability of the internal resistance to drink down the device, due to the mixing of the electrolyte during the shaft, the measurement accuracy and reliability of the device operation significantly increases. Claims of the invention A device for monitoring the condition of bearings, comprising a shaft mounted on the base for installing a monitored bearing, a powering device and a measuring device, one terminal of which is connected to the shaft through the powering device and the other is disposed to be connected to the fixed ring of the monitored bearing, different the fact that, in order to increase the measurement accuracy by eliminating solid pipes of parts that provide electrical contact with the shaft, The device is designed as a cylindrical vessel filled with liquid electrolyte with a lid in which the electrode is fixed, the bottom of the vessel is rigidly connected to the shaft end, the lid is fixed to the base of the device, and the electrode immersed in the electrolyte is electrically connected to the measuring device. Sources of information taken into account in the examination 1. USSR author's certificate 1 195179, class. 01m 13 / 04,19b7 (prototype).

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