SU754253A1 - Device for testing materials and lubricating liquid for friction - Google Patents

Description

The invention relates to the testing of materials and lubricating fluids for friction and, in particular, can be used to determine the lubricity of the drilling fluid. five

A known device for determining the lubricating ability of a drilling fluid containing a disk, spherical friction bodies, and their rotational drive. The lubricity of the drilling fluid is estimated by the expenditure of power on the rolling of spherical bodies [ί].

The closest in technical essence and the achieved effect to the proposed is a device for testing materials and lubricating fluid for friction, comprising a housing, a bowl installed in it with a lubricating fluid, designed for 2! accommodating a friction unit in it, a loading mechanism, made in the form of a hydraulic cylinder and a plunger, mounted in the housing so that the shaft rotates, interacting with the loading mechanism on the one side, and the rotational drive shaft, and the node measuring friction torque, made in the form of a rod and a scale [2 "]. 31

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A disadvantage of the known devices is the low accuracy of the test, since the results are influenced by friction losses in the elements of the device.

The purpose of the invention is to improve the accuracy of the test.

This goal is achieved in that the device is equipped with a second bowl, designed to accommodate an additional friction unit installed coaxially with the first friction unit and connected with an external end face with a rotational drive and an internal end face that interacts with the rod of the friction torque measuring unit coaxial to the rod, double cavity - between the two walls of which is intended to be filled with a viscous liquid, to the blades, one end rigidly connected to the scale, and the other placed in strips and cylinder.

The drawing shows the device for. testing materials and lubricating fluid for friction. It includes a housing 1, a bowl 2 with a friction assembly 3 made in the form of four spherical bodies, a loading mechanism 4 including a hydraulic cylinder 5 and

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plunger 6. A pressure gauge 7 and a bellows 8 connected to the thrust bearing 9 are connected to the hydraulic cylinder 5. In case 1, a shaft 10 is installed, it acts as a driver with a loading mechanism

4 and knot 3 friction. The device has a shaft rotation drive 11 and a friction torque measurement unit, made in the form of a rod 12, scales 13 and springs 14. The second bowl 15 is designed to accommodate an additional friction unit 16, like the first node 3. Additional friction unit 16 plays the role of supporting the rod 12. The device is equipped with a double-wall cylinder 17, the cavity 18 between the two walls of which is filled with a viscous liquid / and blades 19. From the rotational drive 11, the movement is transmitted to the additional friction unit 16 via a belt drive 20 and a hall 21.

_ The device works as follows.

In the bowl 2 and 15 is filled with lubricating fluid. Include the drive 11, which ensures the rotation of the shafts 10 and 21 and the specified rolling with sliding, friction in the friction. Load the body friction using hydrocylindra

5 and the plunger 6. The friction forces arising in the friction units are determined by the rotation of the scale 13 relative to the pointer. The placement of the blades 19 in the cavity 18 filled with a viscous fluid contributes to the rapid calming of the scale 13.0 of the lubricating capacity of the fluid.

Claims (1)

Claim Device for testing materials and lubricating fluid for friction, comprising a housing, a bowl with a lubricating fluid installed in Him, designed to accommodate a friction unit therein, a loading mechanism made in the form of a hydraulic cylinder, and I plunger mounted in the housing with the possibility of rotation of the shaft, on the one hand interacting with the loading mechanism, and on the other - with the friction unit, the drive shaft rotation, and the node "Measurement of friction torque, made in the form of a rod and scale, characterized in that, in order to improve the accuracy of the test, it is equipped with a second bowl designed to accommodate 15 coaxially with the first friction unit of an additional friction unit and connected by an external end face with a rotational drive and an interacting internal end face with a rod of a torque measurement unit 20 friction mounted coaxially the rod has a double-wall cylinder, the cavity between the two walls of which is designed to be filled with a viscous liquid, and the blades, with one end 25 rigidly connected to the scale, and others - placed in the cavity of the cylinder.