RU176843U1 - Traction motor suspension unit - Google Patents

Abstract

The utility model relates to transport engineering, namely, nodes for suspending a traction electric motor to a locomotive carriage frame. A node for suspending a traction electric motor containing bearing supports for supporting the axle pair and a leash connected by ends to the engine body and the carriage frame by silent blocks, one of which, made spherical, mounted on an axis with the possibility of axial movement, while the space between the specified silent block and the axis is filled with a lubricating fluid with ferromagnetic nanoparticles, permanent magnets are placed in the bore of the said silent block. A distinctive feature of the proposed traction motor suspension assembly is that the spherical silent block is placed between the protrusions on the traction motor housing, the lower end of the leash is bifurcated, and the suspension assembly contains three spherical silent blocks , two of which are mounted on opposite sides of the lower protrusion on the body of the traction motor without the possibility of transverse movement. The traction of the traction motor allows to reduce the operating costs of the locomotive by reducing the supply of traction motors in the depot for repair due to the fact that the lower end of the leash is bifurcated and the use of three silent blocks makes it possible to ensure the compatibility of the proposed suspension unit with traction motors of the majority of domestic railways freight diesel locomotives.

Description

The proposed utility model relates to transport engineering, and in particular to the nodes of suspension of the traction motor to the frame of the locomotive trolley.

Known suspension unit traction to the frame of the locomotive trolley, including motor-axial bearings of the traction electric motor and a suspension consisting of springs, swinging suspensions with sliding joints and traverses (see. Med spruce B. B. Rolling stock of electric railways. T. 1. Design and dynamics. - M., Gostranszheldorizdat, 1957, S. 160).

The disadvantage of this node suspension of the traction motor is its complexity and the presence of a large number of parts that wear during operation and require restoration or replacement.

Known suspension unit traction electric motor used on domestic electric locomotives type VL80, VL10, VL11 and VL82 (see VN Kalikhovich. Traction drives of locomotives (device, maintenance, repair). M., Transport, 1983, S. 58). In these locomotives, the traction motor with the bracket is supported through the rubber washers on the suspension, the head of which has a replaceable sleeve made of wear-resistant steel and is connected to the beam of the trolley frame by a floating roller.

The disadvantage of this suspension unit of the traction motor is the high wear of the replaceable sleeve and the floating roller due to the small contact area of the rubbing surfaces, especially when the traction motor is skewed relative to the frame of the trolley. As a result, the gap between the removable sleeve and the floating roller can reach 1.4 ... 2.3 mm in operation, which causes an increase in shock loads acting on the traction motor.

Known suspension unit traction electric motor, used in the English locomotive "Kestrel" (see Biryukov IV and other traction transmission electric rolling stock of railways. M., Transport, 1986, S. 43-44, S. 50-52) . In the specified locomotive in the axial traction drive, the electric motor is connected to the trolley frame using a leash, in the heads of which are mounted spherical and cylindrical rubber-metal silent blocks.

A significant drawback of this unit operating under combined loading conditions (it simultaneously accepts axial and radial loads) is the increased axial loading on the thrust motor thrust bearings during lateral movement of the wheel pair relative to the trolley frame while the locomotive passes small radius curves and turnouts, especially at low up to -50 ° C temperatures at which the rubber stiffness in the silent blocks is increased and the moment of resistance to rotation of the silent blocks is increased.

In addition, increased relative compression strains of the end parts of the rubber bushings of the cylindrical shock absorber lead to additional loads on the motor-axial bearings, which ultimately leads to a decrease in the durability of the bearings and shock absorbers of the suspension unit.

It is also known that in leashes of axle boxes of locomotives that transmit lateral forces from the axle box to the carriage frame, the length of one of the hinges is taken close to 2/3 of the leash length, to ensure angular stiffness of the leash. Such a leash was used, in particular, on the domestic VL85 electric locomotive (see VL85 Electric Locomotive: Operation Manual. / B.A. Tushkanov, N.G. Pushkarev, L.A. Pozdnyakova et al. - M .: Transport, 1992 , P. 14, Fig. 2.8.).

A known node for suspending a traction electric motor (see USSR author's certificate No. 1759693. A node for suspending a traction electric motor / BC Kossov, Yu.N. Sokolov, BC Avramenko, V. M. Surovtsev, S. P. Avdeev, B. I. Godunov and V .P. Kolesnikov - published on September 7, 1992, B.I. No. 33). It contains bearing supports for supporting the axle pair and the leash, ends by means of silent blocks connected to the engine housing and the frame of the trolley, while one of the silent blocks is mounted on the axis with the possibility of axial movement within 1-1.2 of the maximum amplitude lateral movements of the wheelset relative to the frame of the truck, and the parameters of silent blocks are connected by the following ratio:

,

,

where f is the coefficient of sliding friction of the suspension along the inner roller;

F is the total force in the suspension from the weight of the traction motor and the reaction force from the implementation of the traction force, kN;

L is the center-to-center distance by suspension shock absorbers, mm;

t is the length of the inner sleeve of the shock absorber, mm;

Ж _р - radial stiffness of the shock absorber, kN / mm;

W _o - axial stiffness of the shock absorber, kN / mm;

Δ is the amplitude of the lateral movement of the wheelset with an electric motor relative to the frame of the trolley, mm

This suspension unit also has disadvantages. In operation, under the influence of dust, moisture and contaminants, thickening of grease or contaminants containing oil and fuel, at low temperatures, the friction coefficient f of the sleeve along the axis surface can change. In addition, when the leash is skewed during operation, the sleeve pressure on the axis surface is uneven due to the moment of the resistance of the silent block to the skew, as a result of which the sleeve and axis wear at the edges is greater than in the middle. As a result of this, the actual contact length of the bush of the silent block with the axis 1 is less than the length of the internal shock absorber bush adopted above in the indicated ratio. Finally, when the temperature changes, the radial and axial stiffness of the shock absorber will change. All of this together leads to increased wear of the sleeve and the hinge, and with an unfavorable combination of these factors can lead to jamming of the sleeve on the axis, and, as a result, extrusion and destruction of the rubber bushings of the silent block.

As a prototype of the proposed utility model, the suspension unit of the traction electric motor was selected, containing bearing bearings for supporting the wheel pair on the axis and a leash connected by ends with spherical and cylindrical silent blocks, one of which is mounted on the axis with the possibility of axial movement, and in order to increase reliability, the space between the spherical silent block and the axis is filled with a lubricating fluid with ferromagnetic nanoparticles, in the bore of a spherical silent bush permanent magnets are placed, and the length of the rubber sleeve of the upper silent block is at least 2/3 of the center-to-center distance of the suspension hinges L (see RF Patent No. 2549427. Suspension assembly of the traction motor / V.I. Vorobyov, V.G. Novikov, G.S. Mikhalchenko, O.V. Izmerov, A.A. Pugachev, S.G. Volokhov - published on 04.27.2015, B.I. No. 12.).

The disadvantage of this suspension unit is that it is difficult to use for the modernization of suspension units for traction electric motors of most freight and shunting locomotives of domestic railways containing a spring set, consisting of four springs located between two beams and pulled together by bolts, the drawback of which is the rapid wear of the plates ( see Biryukov IV and others. Traction gears of electric rolling stock of railways. M., Transport, 1986, S. 41-42, P. 50-51, Fig. 3.1), since the protrusions traction motor housing, between which a spring set, prevent placing the leash and hinges. When cutting off these protrusions during modernization, it becomes impossible to use such a traction motor to replace a failed traction motor on a diesel locomotive that has not yet been upgraded, which leads to the need to have an additional supply of traction motors in the depot and increases operating costs.

The problem the utility model aims to solve is to reduce the costs of operating and repairing a locomotive by ensuring compatibility of the proposed suspension unit with traction motors of most freight diesel locomotives operated on domestic railways.

This is achieved by the fact that in the suspension unit of the traction motor containing bearing bearings for supporting the wheel pair axis and the leash connected by ends with silent blocks, one of which is made spherical, mounted on the axis with the possibility of axial movement, the space between the indicated silent block and the axis is filled with a lubricant with ferromagnetic nanoparticles, permanent magnets are placed in the bore of the silent block, the spherical silent block is placed between the protrusions on the body of the traction motor, the lower end of the leash is bifurcated, and the suspension unit contains three spherical silent blocks, two of which are mounted on opposite sides of the lower protrusion on the body of the traction motor without the possibility of lateral movement.

The essence of the proposed utility model is illustrated by drawings, where in FIG. 1. depicts the suspension unit of the traction motor to the frame of the locomotive trolley, in FIG. 2 - a leash of the suspension unit, and in FIG. 3 - hinge of the suspension unit.

The proposed suspension unit of the traction motor contains bearing bearings 1 for supporting on the axle of a pair of wheels, a leash 2, by means of silent blocks 3 and 4 and axles 5 and 6 connected to the brackets 7 on the motor housing 8 and the frame of the trolley 9. The silent block 3 is mounted on axis with the possibility of axial movement within 1-1.2 of the maximum amplitude of the transverse movements of the wheelset relative to the frame of the trolley. The rubber sleeve of the silent block 3 has a spherical shape, the space between the axis 5 and the silent block 3 is filled with a lubricating fluid 10 containing ferromagnetic nanoparticles, and permanent magnets 11 are installed in the annular bore of the spherical silent block 3.

In this case, the spherical silent block 3 is located between the protrusions 12 and 13 on the body of the traction motor, the lower end of the lead 2 is bifurcated, and the suspension unit contains three spherical silent blocks, silent blocks 4 are mounted on different sides of the lower protrusion 13 on the traction housing motor without the possibility of transverse displacement.

The proposed site of suspension of the traction motor operates as follows. With the lateral movement of the bracket 7 relative to the frame of the trolley 9, the inner sleeve of the upper silent block 3 slides along the axis 5. The frictional force arising from this does not lead to the skew of the leash 2 relative to the axis 5, due to the fact that the lower silent blocks 4 prevent this. The absence of skew of the lead 2 leads to the absence of skew of the upper silent block 3, as a result of which the pressure of the inner ring of the silent block 3 on the axis 5 extends uniformly along the contact length of the silent block 3 and axis 5, which prevents the destruction of the lubricant layer 10 and jamming of the silent block 3 on the axis 5. Due to the fact that the rubber sleeve of the silent block 3 is spherical, the axes 5 and 6 of the silent blocks 3 and 4 are not parallel, due to the uneven height of the right and left rails of the rail track, also causes an uneven distribution of the pressure of the inner ring of the silent block 3 on the axis 5 along the contact length of the silent block 3 and axis 5. Permanent magnets 11 hold the lubricant in the gap between the silent block 3 and axis 5, which prevents the occurrence of dry niya and scoring of the contacting surfaces of the axis and silent block. Due to the fact that the silent blocks 4 are made spherical, the distortions of the axles 6, resulting from inaccuracies in the manufacture of parts, are compensated by turning the outer bushings of the silent blocks 4 relative to the internal ones.

The technical and economic effect of the claimed utility model consists in the fact that the lower end of the leash is bifurcated and the use of three silent blocks makes it possible to ensure compatibility of the proposed suspension unit with traction motors of most freight diesel locomotives operated on domestic railways, and to reduce the stock of traction motors in the depot for repair , which reduces the cost of operating locomotives.

Claims (1)

A suspension unit for a traction electric motor containing bearing bearings for supporting on the axle of a pair of wheels and a leash connected by ends with silent blocks, one of which is made spherical, mounted on an axis with the possibility of axial movement, while the space between the said silent -block and axis are filled with a lubricant with ferromagnetic nanoparticles, permanent magnets are placed in the bore of the said silent block, characterized in that the spherical silent block is placed between with protrusions on the body of the traction motor, the lower end of the leash is bifurcated, and the suspension unit contains three spherical silent blocks, two of which are mounted on opposite sides of the lower protrusion on the body of the traction motor without the possibility of lateral movement.

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