RU2531067C1 - Tip for input of portions of grease lubricant - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: tip contains a resilient housing with variable volume of hollow installed on a flange with a hole for output of lubrication input line and equipped with a nipple with the channel for lubrication draining, meanwhile the resilient housing is made corrugated, with corrugation, perpendicular with reference to the tip axis, and withstanding the load in one gage atmosphere without deformation towards radial direction, and in the variable volume of the housing hollow the twisted spring is installed, the ends of which are placed in seats made in the flange and nipple and located on the same axis with the hole for output of flange lubrication input line and the nipple drain channel.

EFFECT: improvement of reliability and dynamism of tip operation.

2 cl, 2 dwg

Description

The invention relates to mechanical engineering, can be used for filling lubricants, including in large doses, in components and parts of machines.

A known tip illustrating the method of filling doses of grease according to patent RU No. 2428618 (IPC F16N 21/04, 2011), comprising an elastic casing with a variable, due to the elastic forces of the elastic walls, the volume of the internal cavity and a nipple with a lubricant exit channel, installed on the flange with the outlet opening of the grease supply line.

The disadvantage of the tip is the low efficiency of the suction of the lubricant due to the elastic forces of the walls of the casing when restoring the volume of the internal cavity to the original, especially when the size of the tip must be increased when laying large doses of lubricant. In addition, the flow of lubricant from the supply line into the variable volume of the inner cavity of the casing is not excluded.

The objective of the invention is to increase the reliability of the tip.

The task is solved by the tip for administering doses of grease containing an elastic casing with a variable volume of the internal cavity mounted on a flange with an outlet for the outlet of the lubrication supply line and equipped with a nipple with a grease withdrawal channel, while the elastic casing is corrugated with an arrangement perpendicular to the axis of the tip corrugations that can withstand a load of one excess atmosphere without deformation in the radial direction, and in a variable volume of the inner cavity of the casing is installed a spring, the ends of which are placed in sockets made in the flange and nipple and located on the same axis as the outlet opening of the flange lubrication supply line and the nipple removal channel, while the spring stiffness, upon initial deformation by the value of the corrugation pitch, provides a force exceeding the axial component the force arising from the separation of any corrugation connected by the forces of internal adhesion of the lubricant and the force of atmospheric pressure.

At the output of the line for supplying lubricant to the variable volume of the inner cavity of the casing, a shut-off valve is installed.

New features at the tip are:

- the implementation of the elastic walls of the casing in the form of corrugations;

- the location of the corrugations in planes perpendicular to the axis of the tip;

- corrugations without deformation in the radial direction withstand the load in one excess atmosphere;

- installation in a variable volume of the inner cavity of the casing of a coil spring;

- placement of the ends of the spring in the nests made in the flange and nipple;

- the location of the nests on the same axis with the outlet opening of the flange lubrication supply line and the nipple outlet channel;

- the stiffness of the spring, during initial deformation by the value of the step of the corrugation, provides a force exceeding the axial component of the force arising from the separation of any corrugation connected by the forces of internal adhesion of the lubricant and the force of atmospheric pressure.

In addition, at the outlet of the line for supplying lubricant to the variable volume of the internal cavity of the casing, a shut-off valve is installed.

The presence of new features distinguishes the claimed technical solution from the prototype, which allows us to conclude that it meets the criterion of novelty.

The execution of the shell of the corrugated casing reduces the axial force for its compression while reducing the variable volume of the internal cavity before filling the grease, including due to the compression of the corrugations by atmospheric pressure. When removing the tip and increasing the variable volume of the internal cavity of the corrugation, the radial compression of the casing is prevented by atmospheric pressure.

The coil spring allows you to restore the original volume of the inner cavity of the casing by overcoming the forces of internal adhesion of the lubricant and the force of atmospheric pressure when the corrugations stick together in the position of the grease. Installing the ends of the spring in the seats of the flange and nipple, even with tight closing of the coils in the position of the lubrication tab, allows the lubricant to move freely from the outlet outlet of the supply line in the flange to the nipple outlet channel through the channel formed by the inner diameter of the spring coils. In addition, the use of a twisted spring greatly simplifies the selection and calculation of the geometric and power parameters of the tip. The location of the sockets on the same axis as the outlet opening of the flange lubrication supply line and the nipple outlet channel allows, in the absence of stiffness of the nipple suspension on the casing, to set the nipple removal channel along the axis of the outlet opening of the flange lubrication supply line due to the radial stability of the coil spring, which provides the shortest path and minimum energy costs when moving a dose of lubricant through a variable volume of the inner cavity of the casing when it is placed in the part. The force of the spring at the beginning of its deformation by the value of the step of the corrugation is greater than the axial component of the forces of internal adhesion of the lubricant and the force of atmospheric pressure on the maximum adhesion area of the corrugation ensures the restoration of the original variable volume of the internal cavity of the elastic corrugated casing when it is withdrawn from the lubricated part.

Installing a shut-off valve at the outlet of the lubrication supply line eliminates the flow of lubricant into the variable volume of the internal cavity of the casing in the absence of working pressure in the supply line.

In the inventive tip, new, in comparison with the prototype, features provide new properties, which allows us to solve the problem.

Since there are no signs distinguishing the claimed solution from the prototype in other sources, we can conclude that the solution corresponds to the inventive step.

Figure 1 shows the tip in the standby position, figure 2 - the same in the position of the bookmark lubrication.

The tip contains an elastic corrugated casing 1 with a variable volume of the internal cavity 2 and a nipple 3 with a channel 4 of the grease. The casing is clamped 5, attached to the flange 6. An opening is made in the flange with a shut-off valve 7 installed in it for the outlet of the line 8 for supplying pressure lubrication. Coaxial to the hole, with a shut-off valve installed in it, in the flange 6 there is a socket 9, in which one end of the coil spring 10 is placed, the second end of which is placed in the socket 11 of the nipple 3, made coaxially with the lubricant discharge channel 4. The lubricant is placed in the part 12, for contact with which there is a stop 13 with channels for air outlet, of any shape, for example in the form of holes 14.

The tip works as follows. After the contact of the support surface of the stop 13, when the tip is supplied to the lubricated part 12, the spring 10 is compressed, the corrugations of the elastic walls of the casing 1 are easily folded, including due to the action of the axial load in the form of atmospheric pressure on the corrugation area, the variable volume of the inner cavity 2 of the casing decreases and the lubricant is displaced into the channel 4. After that, from the line 8 under pressure through the shut-off valve 7, if any, and the minimum volume of the internal cavity 2, a dose of lubricant is pumped into part 12. Even with fully compressed turns of the spring 1 0 the inner diameters of the turns form a channel for pumping lubricant. The air displaced from the cavity of the part exits, for example, through the holes 14. After issuing a dose of lubricant, the pressure in the line 8 drops and the shut-off valve 7, if present, closes the outlet opening of the line for supplying lubricant to the variable volume of the internal cavity 2. When the tip is withdrawn, the compressed the spring 10 holds the stop 14 in contact with the part 12. As the flange 6 rises, the coil of the spring is opened and the corrugations of the elastic casing 1 are disconnected, if they close at the grease filling position. The casing 1 takes its original shape, and the volume of the cavity 2 increases. The lubricant through the channel 4 is sucked into the casing with the formation of an air cavity. In this case, the corrugations prevent the radial compression of the casing and the reduction of its volume under the influence of atmospheric pressure. In the presence of a shut-off valve 7, the lubricant can be suctioned out to a minimum volume until a meniscus is concave toward the inner cavity 2 in the channel 4.

The tip allows the lubricant to be sucked out of the channel 4 of the nipple with the formation of an air cavity with the speed of removal of the tip from the part. The shutoff valve 7 eliminates the flow of lubricant from the line 8 of its supply into the variable volume 2 of the internal cavity of the elastic casing. This ensures the operation of the tip with minor deformations of the spring and the casing, which helps to increase the reliability and durability of its work.

Claims (2)

1. A tip for administering doses of grease containing an elastic casing with a variable volume of the internal cavity mounted on a flange with an outlet opening of the lubricant supply line and equipped with a nipple with a lubricant withdrawal channel, while the elastic casing is corrugated with an arrangement of corrugations perpendicular to the axis of the tip, withstand the load in one excess atmosphere without deformation in the radial direction, and a coil spring is installed in the variable volume of the inner cavity of the casing, the ends of which are placed in nests made in the flange and nipple and located on the same axis as the outlet opening of the flange lubrication supply line and the nipple outlet channel, while the spring stiffness, upon initial deformation by the value of the corrugation pitch, provides a force exceeding the axial component of the force that occurs when any corrugation is disconnected connected by internal adhesion forces of the lubricant and atmospheric pressure. 2. The tip according to claim 1, characterized in that at the outlet of the line for supplying lubricant to a variable volume of the inner cavity of the casing, a shut-off valve is installed.

Images