SU789700A1 - Method and apparatus for testing elastic sealing rings - Google Patents

Description

one

The invention relates to the manufacture of rubber technical parts, namely, methods and devices for testing them, and is intended to carry out accelerated tests of sealing rings by evaluating their rheological properties.

A known method for determining the rheological properties of elastomeric materials during their vulcanization, 10 is carried out on rotational shear viscometers, consisting in that the rotor placed between the layers of rubber compound and the entraining layer of material, ts Hc1 extending at its surface, rotate. According to the magnitude of the rotational resistance of the rotor, the plastic properties of the material under investigation are judged, and by the rate of increase of the resistance, the ability to undergo structuring during heating.

The device for carrying out the test of elastic sealing rings contains a rotor placed in a heated form and placed between the layers of rubber compound and.

The disadvantage of the method and device is application only for study thirty

The properties of raw rubber compounds or other plastic materials cannot be used to study the PROPERTIES of elastic materials in specific seals, due to the impossibility of making similar contact with the mass of compaction material and its displacement due to the rotation of the contacting surfaces.

The closest to the invention in its technical essence and the effect achieved is the method of testing elastic sealing rings, which consists in bringing the ring into contact with surfaces that make relative movements with each other, this method is carried out by a device containing a base mounted on it rotary cup with heaters, connected to the drive, core and power meter 2j placed inside the cup.

the disadvantage of the method of testing elastic sealing rings and the device for its realization is a long process of determining the performance of elastic sealing rings, since the testing of seals (including

for fixed joints) is a long process in which different media and physical factors affect the seal installed in the seat of the simulator or full-scale node, and the main indicator characterizing its performance is the time it takes to seal cavities.

The purpose of the invention is to save time for determining the performance of elastic sealing rings.

This goal is achieved due to the fact that the test ring is subjected to a circular knowledge of alternating shear without slipping contact surfaces.

In the device for carrying out the method, the core is made with channels for supplying the medium to the cavity of the glass under pressure and is rigidly connected to the base, and the load cell is placed on the rotary glass and is kinematically connected with the drive.

In addition, the device is equipped with a cooler, covering the rotary glass.

FIG. 1 shows a device for carrying out a method for testing elastic sealing rings, a general view; in fig. 2 — a seal assembly with channels for supplying fluid; in fig. 3 — cam drive, side view, FIG. 4 - cam drive, top view.

A device that implements a method for testing elastic sealing rings comprises a base 1, on which a core 3 with test rings 4 is secured with a nut 2. The core 3 has a cavity 5 for the working medium, which is fed through the channel 6 and the channels 7. A rotary cup is installed on the core 8 with shoulders, with a bearing bearing 9. The cooler 10 is located outside the swiveling housing in the form of a coil (for supplying liquid nitrogen), and the induction heating heater is located in the housing 11. carcass 12. A power meter 13 is installed on a rotary cup, kinematically connected with a drive 14, having on its common axis a double eccentric and an upper 15 circular profile and a lower 16 pointed profile, which is in contact with the upper 17 and lower 18 forks of Katm strength meter. The cams are mounted on a block 19, moved by means of a screw 20 in the housing 21, mounted on the shaft 22 of the drive 14. The device under test is enclosed in a removable thermostat 23.

The device works as follows.

The core 3 with the test rings 4 is installed inside the pivot cup 8 and secured with a nut 2 on the base 1. Through channels 7 and the pipeline 6 of the core 3, the medium under pressure is supplied to the working cavity 5. Using screw 20, the block 19 is moved with the eccentrics 15 and 16 in the housing 21 and the required value of their displacement relative to the axis is established. When the actuator 14 is turned on, the shaft 22 is rotated with the housing 21 and the eccentrics 15 and 16, which are in contact with the load cell 13. The upper eccentric 15 of the circular profile is in continuous contact with the top fork 18 of the load cell, performs its short-term pressure and force rotation of the glass 8 relative to the core 3 within the shear deformation of the rings. The cup 8 is returned to the neutral position under the action of the resilient forces of the test rings two times one turn after the lower pointed cam 16 comes out of contact with the fork meter 18 of the load cell.

The method of testing elastic pressure rings, carried out by the device, allows you to monitor the state of the material during the compaction process, makes it possible to work out the acceleration testing method and, based on it, scientifically predict i: a6oTo-ability of rings.

Claims (3)

1. A method of testing elastic sealing rings, which consists in bringing the ring into contact with surfaces that are displaced relative to each other, characterized in that in order to reduce the time to determine the health of the elastic sealing rings, the test ring is subjected to a circular alternating shear without slipping contact surfaces. 2. Device dl. Method of claim 1, comprising a base mounted on it a rotary cup with heaters, associated with a drive, a core and a load cell placed inside the cup, which is characterized in that the core is made with channels for supplying the medium to the cavity of the cup under pressure and is rigidly connected with the base and the load cell is placed on the swivel cup and kinematically connected with the drive. 3. The device according to claim 2, about tl and. The fact that it is equipped with a cooler, covering the rotary cup. Sources of information taken into account in the examination 1. Mechanical testing of rubber and rubber. M ,, Himi, 1964, p. 57. 2. In the same, with, 62 (prototype). / 7 2J a / ff f f Fg / g f 23 s    L l g 2