SU1142773A1 - Device for joint coupling strength-testing - Google Patents

Abstract

DEVICE FOR TESTING; HINGE CONNECTIONS FOR STRENGTH containing the base, installed on it the first sealing plug designed to accommodate the inner link of the hinge joint, the second sealing plug designed to accommodate the external link of the hinge joint, the swing mechanism of the outer link, the rotational movement mechanism The unit for supplying the working medium to the zone of contact of links, characterized in that, in order to increase the reliability of the results, it is equipped with coaxially replennom the second hollow cylinder plug, hingedly mounted on a first stub rod telescopically connected to the cylinder ustanovleynnmi between the rod and the cylinder adjustable spring compression forces node registration units and in contact displacement meter E latter. .

Description

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The invention relates to a testing technique and is intended for testing for strength (hermetic durability, service life and corrosion resistance) under load. HFJX joint of ball joints (ball joint, cardan compensators of seawaters of subsea wellhead equipment for drilling of oil and gas wells). The closest to the proposed technical essence and the achieved effect is a device for testing hinge joints for strength, comprising a base, a sealing cap mounted on it for accommodating the inner link of the hinge joint, a second sealing plug for accommodating the outer link of the hinge joint the swinging mechanism of the outer link, the mechanism of rotational motion of the inner link, the node supplying the working medium to the contact zone links Cl. However, the known device is characterized by a lack of reliability of the results of testing hinge joints for strength, which is due to the influence of acting c. swivel force on the bias of the sealing caps, the inability to control the position of the links of the hinge joint. The goal and gain is to increase the reliability of the test results of hinged joints for strength. This goal is achieved by the fact that the device for testing hinged joints for strength, comprising a base, a first sealing plug mounted on it, designed to accommodate an internal link of a hinge joint, a second sealing plug designed to accommodate an external link of a hinge joint, a swing mechanism of an external link, the mechanism of rotational movement of the internal link, the node for giving the working medium to the zone of contact of the links, is equipped with coaxially fixed on the second second hollow stub tsilind rum, pivotally mounted on the first plug rod telescopically with the cylinder of the connections established between the rod and the cylinder is adjustable mymi compression springs, - node registers of effort radio links and in contact displacement meter E latter. Figure 1 shows a device for testing articulated joints for strength; figure 2 - node I in figure 1; on fig.Z - node P in figure 1. The device comprises a base 1, a sealing plug 2 for accommodating the inner link 3 of the hinge joint 1, a second sealing plug 4 for accommodating the outer link 5 of the hinge joint, a swinging link mechanism 6 of the link 5, a rolling movement mechanism 7 of the link 3, the working medium supply unit 8 . The device is equipped with a hollow cylinder 9 coaxially mounted on the second plug 4, a rod 10 pivotally mounted on the first plug 2, telescopically connected to the cylinder 9, mounted between the rod 10 and the cylinder 9 by adjustable compression springs 11, the force detection unit 12 (FIG. 2) in contact links 3 and 5 and gauges 13 displacements of the latter. Link 5 (figure 2) includes the upper 14 and the middle 15 of the body, connected by a group of bolted connection 16 with adjustable gaskets. On plug 4 (Figures 1 and 3), bearing 18 is mounted by bearings 17. Mechanism 6 (Figure 1) includes an engine (not shown), a connecting rod 19 connected to thrust 20 and a rocker arm 21. Th ha 20 is pivotally connected to an emphasis 22 of the support 18. Between the thrust 20 and the rocker, a node 12 for recording the forces acting in the hinged connection in the contact of the links 3 and 5 during their relative movement is installed. The mechanism 7 is made in the form of a gear drive, through which rotation from the engine (not shown) is transmitted to the plug 2 and link 3. Link 3 and 5 are placed in a bath 23 filled with external environment (for example, sea water) using channels (not shown) Made in the plug 2, the working medium under the pressure of P is fed into the internal cavity (not shown) of the hinge under test. The lubricant is supplied under pressure P2 to the contact of the links 3 and 5 from the node 8 by the hydraulic pump unit 24 and the channels 25. The cylinder 9 (FG.C) is fixed along the axis of the plug 4 with the possibility of adjustment. The rod 10 is provided with a ball-shaped fillet 26 fixed to the plug 2 by means of the support plate 27 and the cover 28. The compression of the compression springs 11 is carried out with the help of a screw 29. The rod 10 is equipped with a scale 30 with a force indicator 31. The axial loading of the joint of the housings 14 and 15 is carried out by the node 32 (FIG. 2) by means of cup washers 33 with indicator rings 34. With the help of the displacement meter 13 (FIG. 2), the axial displacement dx (4) of the link 14 of the link 5 relative to the housing is measured 15 from the action of the axial load equal to the separation

links 3 and 5 when pressure is applied to the internal cavity of the hinge joint. The mixing meter 13 is provided with an indicator 35, the tip 36 of which is in contact with the housing 14. The console 37 controls the hydraulic pump unit 24, allows the device to regulate and control the pressure, the number of oscillations of the link 3, the force in the hinge joint. A sealing cuff 38 is installed between links 5 and 3.

The device works as follows.

Depending on the size of the swivel under test, the adjustable cylinder 9 of the plug 4 is adjusted with a screw 29 to a force equal to the weight of the swing mechanism 6 and the external link 5. The force on the springs 11 is taken opposite to the axial force of the junction between the housings 14 and 15, measured on a scale of 30. Install plugs 2 and 4 on the links x 3 and 5 and seal; internal cavity of soy dineni. Then, the swivel is mounted on the base 1, joining the bodies 14 and 15 between themselves, loading the joint of their connection with the help of the assembly 32 with a force equal to the force of the acting torque and bending moments. The plug 4 is connected to the swing mechanism 6. The working medium is injected into the internal cavity of the hinge joint and an internal working pressure is created, imitating the pull-off force of the outer link 5 and the inner 3 from each other. In this case, the upper body 14 of the link 5 is displaced in the angular and linear direction relative to the internal link 3 by the amount of elastic deformations and backlashes selected in the gaps of the joint, which cause misalignment and biting of the sealing cuffs.

0 38, which degrades the quality of the tested compounds, reduces the reliability of the test results. Taking into account the angular and linear deviations, an adjustable gasket (not shown) is selected and installed in the joint of the housings 15 and 14.

Then, tests for tightness, wear resistance, durability and corrosion resistance are carried out.

Q The device provides a swing angle, reaching + 15 ° and, the pressure inside the joint is up to 26 kgf / / cm, the number of rotations of the swivel joint is up to 10, the number of swings

5 per minute to 5, the number of cycles varies from 10 to 800.

The positive effect is due to the increased reliability of the results of testing the hinged joints for strength by measuring the forces acting in the joint, and monitoring the position of its links and taking into account their effect on the bias of the sealing plugs.

35 J16

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FIG. 2

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Claims (1)

STRENGTH TEST DEVICE / HINGED COMPOUNDS, containing a base, a first sealing plug mounted on it, designed to accommodate an internal link of a swivel joint, a second sealing plug, designed to accommodate an external link of a swivel joint, swinging mechanism of the external link, rotational mechanism the movement of the internal link, the node supplying the working medium to the eon of contact of the links, characterized in that, in order to increase the reliability of the results, it equipped with a hollow cylinder coaxially mounted on the second plug, a rod pivotally mounted on the first plug, telescopically connected to the cylinder, adjustable compression springs installed between the rod and the cylinder, a unit for recording the forces in the contact of the links and the displacement meters of the latter. > 1 142773