Device for controlling the strength of apresski on the neck axis of the bearing ring by heat assembly

 

The invention relates to a mechanical Assembly production, and is intended for direct control of the strength of the coupling parts with tightness in formed joints. The device comprises an elastic element mounted concentrically relative to the bearing ring and having on their surface a closed casing, the strain gages. The elastic element is designed as conical inner surface and has on its outer cylindrical surface in the middle part of the last annular groove on this part which is placed under the protective cover of high-temperature strain gages, and from the large diameter of the conical surface of the elastic element is made of the internal thread on the length of the latter. The device has a split clamping sleeve with a tapered outer surface that is installed with the possibility of interaction between the inner surface of the elastic element with the outer surface of the monitored bearing rings. The invention will improve the reliability of the estimate of the strength of the coupling of thermal narisovat of rings on the neck of wheelset axles. 2 C.p. f-crystals, 1 Il.

The invention otoshev covering details namely technology thermal apresski inner rings of the roller axle bearings on the neck of wheelset axles of railway rolling stock. Designed for direct control of the strength of the coupling parts with tightness in formed joints.

The production used the indirect method of monitoring the strength of the heat apresski rings on the neck of the axes, which consists in determining the difference between the values of the diameters of the landing surfaces before Assembly (averaged tightness, normalized in the range of 0.04-0.06 mm for roller wheelset cars RU-950) with the help of measuring instruments. Control landing measurements of diameters does not provide the possibility to obtain quite accurate estimates of the actual magnitude of the contact pressure causing stress state of parts of the obtained compound with tightness, resistance landing a relative shift and turning a covering detail [1].

The closest to the technical nature of the claimed device is a load cell to measure forces in the components of mechanisms [2]. The load cell consists of a measuring element with strain gauges that are included in the measuring mauzey which surface along and across the axis of symmetry of the strain gauges pasted, United in bridge measuring circuit. The application of this load cell does not ensure the reliability of monitoring the strength of the coupling parts with tightness in formed joints.

Object of the invention is the reliability of quality control in the Assembly of thermal connection the axis of the neck - ring of the bearing to extend the service life and reliability-axle hubs and wheelsets cars of 1520 mm

The technical result is achieved due to the fact that the device for controlling the strength of apresski on the neck axis of the bearing rings under thermal joint Assembly includes an elastic element mounted concentrically relative to the last, which has on its surface a closed casing, the strain gages. The elastic element is designed as conical inner surface and has on its outer cylindrical surface in the middle part of the last annular groove on this part which is placed under the protective cover of high-temperature strain gages. From the large diameter of the conical surface of the elastic element is made of the internal thread on the length of the latter. The device further comprises a split clamping sleeve with stake is Enna surface of the elastic element with the outer surface of the monitored bearing ring, and provided with a packing nut with a through hole of the outer diameter of the cylindrical surface of the monitored bearing rings, which when screwing into the internal cavity of the elastic element acts on the end face of a tapered adapter sleeve, this creates a pre-stressed state of the connection.

The drawing shows a device for controlling the strength of apresski on the neck axis of the bearing ring at a thermal Assembly.

The device comprises a measuring cone spacer 1, provided with the annular cavity And to accommodate evenly spaced around the circumference of four high-temperature strain gages 2 and thermocouple 3, the annular rib 4 with slots 5 flanged wrench and the protective cover 6 mounting 7 and the tapered split clamping sleeve 8 with a packing nut 9 for tightening the threads after installation of the sleeve 1 on the ring 10 bearing subject to thermal press-on.

The device operates as follows. Cone measuring sleeve 1 is put on the ring 10 and set concentric relative to the ring using an adapter sleeve 8. Then tighten the gland nut 9. This reduces the gap oboznachennom raceway on the ring 10 bearing due to an intermediate compressible element (conical sleeve 8). Assembly of the elements 1, 8, 10 (composite thick-walled cylinder) prepared for heat build connections neck axis-ring bearing”. Using instrumentation to record the temperature and the initial circumferential stresses on the surface of the measuring sleeve 1, taking readings of the load cell 2 at a temperature of industrial premises and thermocouple 3.

Data is automatically displayed on the printing device. Disconnect the measuring apparatus and heated in the collection of composite thick-walled cylinder (1, 8, 10) until the final expansion of the bearing ring under seat size (gap) on the neck of the axis of the wheelset. The heating temperature is not more than 100-120With that overheating is not allowed. Connected to the heated block (1, 8, 10) measuring and recording equipment and combine the bearing ring 10 with the neck axis, the locking position of the latter at the place of landing. Record the maximum voltage on the surface of the fixing of the load cell 2 and the heating temperature. Turn off the recording equipment at the time of the full cooling elements and obtain connection with tightness “of the axis of the neck-ring of the bearing. After this include measuring apparatus and the printer device is in (the axis of the neck-ring bearing-adapter bushing-strain nut) to a temperature industrial premises. By calculation is the determination of values of circumferential stresses Gtnon the inner surface of the bearing ring, the actual tension and contact pressure in the area of the coupling ring with the neck axis of the wheelset. Thus, the control is carried out twice: 1 - before thermal Assembly in an indirect way by measuring the landing surfaces of the parts and their selection of a given value of tension (0,04-0,06 mm); 2 - after cooling of the bearing rings in the place of his landing on the neck axis in the stress value from the actual tension in the pair. This greatly increases the reliability of the estimate of the strength of the coupling of thermal narisovat of rings on the neck of wheelset axles. The results obtained by measuring voltages in excess of normalized values from the established reference value. Otherwise, the obtained thermal connection is rejected and subject to dissolution. The findings characterize the magnitude of the normal tensile stresses on the surface of the sleeve 10 at a temperature industrial premises.

Sources of information

1. Grecised E. C., Ilyashenko, A. A. Connection with tension. Calculations, design, manufacture. - M.: Mashinostroenie, 1981, SS. 5, 32-33, 204.

2. A. C. S

1. Device for controlling the strength of apresski on the neck axis of the bearing ring by heat Assembly containing an elastic element mounted concentrically relative to the latter and having on their surface a closed casing, the strain gages, characterized in that the elastic element is designed as conical inner surface and has on its outer cylindrical surface in the middle part of the last annular groove on this part which is placed under the protective cover of high-temperature strain gages, and from the large diameter of the conical surface of the elastic element is made of the internal thread on the length of the latter.

2. The device under item 1, characterized in that it has a split clamping sleeve with a tapered outer surface that is installed with the possibility of interaction between the inner surface of the elastic element with the outer surface of the monitored bearing rings.

3. The device according to p. 2, characterized in that it is equipped with a packing nut with a through hole of the outer diameter of the cylindrical surface of the testing ring of the bearing that is installed with the possibility of screwing into the internal cavity of the elastic is

 

Same patents:

The invention relates to load technique and is intended for use in measuring efforts to polerowanie the stock pumper setup

The gripper // 2215647
The invention relates to the field of robotics

The invention relates to measurement techniques, in particular to determine the stresses on the surfaces of machine parts

The invention relates to strain gauges and can be used in mechanical engineering

The invention relates to load technique

The invention relates to techniques for measuring residual mounting, technological and operational stress

The invention relates to measuring technique and can be used in hydromeliorative, in particular, in the development of oil industry equipment

The invention relates to load technique

The invention relates to measurement techniques, in particular to the weight and load sensors

The invention relates to flywheels, consisting of two masses with the possibility of rotation relative to each other by means of a support, and to the tight fit of the bearing in/on one of these masses to provide support

The invention relates to the field of General engineering, in particular to the development of manufacturing technology of dismountable joints of machine parts using shape memory effect

Composite matrix // 2198761
The invention relates to equipment for processing of metals by pressure, particularly to constructions composite cylindrical matrices with shroud ring

The invention relates to the field of repair of armored vehicles and armament in the field of military repair services

The invention relates to the Assembly of the pistons of internal combustion engines and can be used in the repair and restoration of the pistons

The invention relates to a method of fixing the metal parts from turning around the axis of the mounting and can be used in various fields of technology and engineering, for example for fixing the spring clip and an acoustic alarm device wear on the pad disk brake car

The invention relates to railway transport, in particular to the connection of the wheels to the axle of the wheelset, and can be used to join parts with tightness in mechanical engineering

The invention relates to the repair of armored vehicles

The invention relates to mechanical engineering and can be used in connection with tightness details type shaft sleeve by means of hot pressing

The invention relates to mechanical engineering and can be used in connection with tightness details type shaft sleeve

FIELD: machine engineering, possibly manufacture of sealing envelopes of corrosion resistant steels of metal-plastic high-pressure bottles.

SUBSTANCE: method comprises steps of separately making metallic convex bottoms with cylindrical collar and backing ring. Thermal expansion factor of backing ring exceeds that of bottoms; outer diameter of backing ring provides close fit of bottoms onto it at 20°C; cooling preliminarily assembled backing ring with bottoms until cryogenic temperature; sliding bottoms on backing ring in cooled state until mutual touch of cylindrical collars of bottoms; heating assembly up to 20°C in order to provide close fit of backing ring in cylindrical collars of bottoms; welding bottoms along butt of assembly and then removing backing ring by chemical milling.

EFFECT: simplified process of making envelopes with enhanced mass characteristics.

2 cl, 4 dwg, 1 ex

Up!