ES1290559U - Filling regulation device of a housing, especially a gearbox housing (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

REGULATION DEVICE (1) Filling a housing (2), especially a housing of a gearbox, inside which enters and continues a fluid, which is intended to be coupled to a Housing output driving (2), in which the device is characterized by what it includes: an entrance mouth (3) coupling to the output driving of the housing (2), through which the fluid enters, an exit mouth (4) through which the fluid comes out, some cameras (5, 6, 7), and a piston (8) floating that displaces in a longitudinal direction inside the cameras (5, 6, 7) so that depending on their position inside them and with respect to the entrance mouth (3), It facilitates a greater or lesser flow of fluid flow and therefore determines a lower or greater height of the fluid level inside the housing (2). (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

Device for regulating the filling of a casing, in particular a gearbox casing

Object of the invention

The present invention relates to a device for regulating the fluid filling of a casing or tank, which allows the amount of fluid contained in the casing to be adjusted at any time to the desired level.

This invention is applicable to casings or tanks in which fluid is entering and leaving at the same time, and it is desired to regulate the height level of the fluid inside the casing.

This device is of special application for gearbox test benches, in which it is desired to establish different height levels of the hydraulic fluid inside the gearbox casing, in order to subject it to different tests.

Background of the invention

Gearboxes normally work with hydraulic fluids that have a lubricating function, although in certain gearboxes they also have an actuation function in which they cause the activation/deactivation of certain internal elements of the same.

These gearboxes work with a permanent circulation of hydraulic fluid that enters the casing through an inlet hole and leaves it through an outlet hole, going through a closed circuit, in conditions in which a maximum height level is established. reached by the fluid in constant circulation inside the casing, which is considered adequate for the work of lubrication and actuation of the gearbox.

When it is desired to test the operation of the gearbox, either for repair work, maintenance or during development tests, the gearbox is mounted on a test bench in which different operating conditions to which the gear is subjected are simulated. gearbox.

For this purpose, these test benches usually mount a motor that rotates the box and a brake that controls the resistant torque to which the box is subjected, as well as having, among others, a hydraulic installation connected to the gearbox that simulates the hydraulic system associated with the box when it is mounted on a vehicle, such as a truck or tractor, for example.

In order to carry out different tests on the behavior of certain elements of the gearbox, it is necessary to vary the nominal operating conditions of the gearbox and establish new, more aggressive conditions that reach elements that in their normal operation do not show wear or possible damage. design problems.

For example, in the case of seals or other gearbox components, tests can be carried out with a higher level or height of lubricating fluid in constant circulation. inside the casing, making it necessary to control the level of fluid depending on the conditions of the test to be carried out.

The solution of closing the outlet hole of the gearbox to reach a level of the fluid inside it higher than usual is known, which means stopping the installation, disconnecting the return pipe that may be connected to the outlet hole, and cover this hole, with the inconvenience that derives from all this operation, which does not guarantee the possibility of knowing precisely the level of fluid that is being reached inside the casing, which can even overflow.

Description of the invention

The filling regulation device of a casing that constitutes the object of this invention is intended to be inserted in a conduit connected to the outlet of the casing in which fluid enters and leaves in constant circulation, to regulate accurately at any time , the level of fluid height that is reached inside the casing without having to stop the installation.

The filling regulation device allows, on the one hand, the free passage of fluid flow to the outlet of the casing in a fully open situation and, on the other hand, the progressive retention of fluid in a controlled manner when the intention is to increase the level of fluid in the inside of the casing.

For this purpose, the filling regulation device is equipped with chambers, an inlet mouth that can be coupled to the outlet pipe of the casing, through which the fluid enters the interior of the device, an outlet mouth through which the fluid of the device, and a floating piston that moves in the longitudinal direction inside the chambers in the opening or closing direction, in such a way that, depending on its position inside the chambers with respect to the inlet, it facilitates a greater or lesser entry of the fluid flow inside the device and consequently determines a smaller or greater height of the fluid level inside the casing.

To regulate the position of the floating piston, it has been planned that the device incorporates air inlet holes intended to be connected to a pneumatic installation, said holes being located connected to different sectors of the piston to facilitate the push of the piston in one direction or another. depending on which of the inputs the pneumatic installation applies pressure to.

In this way, by controlling the air circulation direction of the pneumatic installation, normally through a differential valve, the direction and the force exerted on the piston are regulated, in order to control the position of the piston, which remains in balance with the opposite force exerted by the flow of fluid entering the interior of the device in the opposite direction to the closing direction of the plunger, which in turn will determine the level of the fluid inside the casing.

Said chambers may comprise a main chamber, an intermediate chamber connected to the main chamber and a rear chamber connected to the intermediate chamber.

The plunger can be made up of three sectors: a front sector with a preferably conical configuration that moves inside the main chamber and inside the inlet to close or open it progressively, thus precisely controlling the flow rate of the fluid that enters the device, an intermediate sector that moves guided inside the intermediate chamber and a rear sector that moves guided inside the rear chamber.

The rear chamber is preferably connected to one of the air intake holes, in such a way that when pressurized air enters through said hole, it causes a thrust force on the rear sector of the piston that determines the displacement of the piston in the direction of movement. closure against the force exerted by the fluid flow. On the other hand, the intermediate chamber is preferably connected to another of the air inlet holes, in such a way that when pressurized air enters through said hole, it causes a thrust on the intermediate sector of the plunger that determines the movement of the plunger in the sense of openness.

The plunger is configured in its intermediate and rear sectors with dimensions such that it allows for a certain clearance to be established inside the chambers, with provision being made in the case of the intermediate sector for the possible incorporation of a projection on its external surface against which the piston strikes. pressurized air when you want to push the plunger in the opening direction.

Description of the drawings

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of its practical embodiment, a set of drawings is attached as an integral part of said description. where, by way of illustration and not limitation, the following has been represented:

Figure 1.- Shows a plan view of the device object of this invention.

Figure 2.- Shows a sectioned elevation view according to cut A-A of figure 1 in which the piston is observed in a situation of maximum opening.

Figure 3.- Shows the device in the position of figure 2 when pressurized air is applied to the piston in the closing direction.

Figure 4.- Shows a schematic installation in which the device of the invention and its incidence on the fluid level in the casing when the piston is in the position of figures 2 or 3 can be seen.

Figure 5.- Shows a sectional elevation view according to section A-A of figure 1 in which the position of the plunger is observed in a situation close to closure.

Figure 6.- Shows the device in the position of figure 5 when pressure is applied to the plunger in the opening direction.

Figure 7.- Shows a schematic installation in which the device of the invention and its incidence on the fluid level in the casing when the piston is in the position of figures 5 or 6 can be seen.

Preferred embodiment of the invention

In view of the figures, a preferred embodiment of the regulation device (1) for filling a casing (2) is described below, inside which it enters and exits automatically. A fluid continues, which is intended to be coupled to an outlet pipe of the casing (2), as can be seen in figures 4 and 7.

Figure 2 shows that the device basically comprises an inlet port (3) that can be coupled to the outlet pipe of the casing (2) through which the fluid enters, an outlet port (4) through which the fluid exits and some chambers (5, 6, 7), as well as the device also comprises a floating piston (8) that moves in the longitudinal direction inside the chambers (5, 6, 7), as can be seen in figure 2 , so that depending on its position inside them and with respect to the inlet (3), it facilitates a greater or lesser passage of fluid flow and therefore determines a smaller or greater height of the fluid level inside the casing (2).

The device also incorporates some air inlet holes (9, 10) intended to be connected to a pneumatic installation, said air inlet holes (9, 10) being located, shown in Figure 5, connected to different sectors of the piston ( 8) that allow the entry of pressurized air to push the piston (8) in one direction or another depending on which of the air inlet holes (9, 10) the pneumatic installation applies pressure to.

The chambers (5, 6, 7) comprise a main chamber (5), an intermediate chamber (6) connected to the main chamber (5) and a rear chamber (7) connected to the intermediate chamber (6), and the plunger (8) comprises a front sector (11) of preferably conical configuration that moves inside the main chamber (5) and inside the inlet (3), an intermediate sector (12) that moves guided in the interior of the intermediate chamber (6) and a rear sector (13) that moves guided inside the rear chamber (7).

The device also incorporates a tank (14), referenced in figures 1 and 5, which houses the main chamber (5) inside and has the inlet mouth (3) and the outlet mouth (4) connected, as well as The device incorporates an intermediate body (15) coupled to the reservoir (14) that houses the intermediate chamber (6), and has a rear body (16) coupled to the intermediate body (15) that houses the rear chamber (7).

On the other hand, the air inlet holes (9, 10), as seen in figure 5, comprise a first air inlet hole (9) located in the rear body (16) through which air circulates. pressure against the rear sector (13) of the piston (8) in the closing direction, a situation that is represented in figure 3, and a second air inlet hole (10) located in the intermediate body (15) through which Pressurized air circulates against the intermediate sector (15) of the piston (8) in the opening direction, a situation that is shown in figure 6.

Figures 5 or 6 show that the intermediate sector (12) of the piston (8) incorporates a projection (17) on its external surface against which the pressurized air strikes when you want to push the piston (8) in the direction of movement. opening, as seen in figure 6.

Additionally, it has been planned that the device incorporates a complementary bushing (18) that is inside the tank (14) that incorporates part of the intermediate chamber (6) that it shares with the intermediate body (15) to facilitate the guided displacement of the piston (8) inside and that is provided with transverse passages (19) that facilitate the exit of the pressurized air that circulates through the rear and intermediate chambers (16, 15) towards the chamber (5).

Claims (7)

1. Regulation device (1) for filling a casing (2), especially a gearbox casing, inside which a fluid enters and leaves continuously, which is intended to be coupled to a outlet conduit of the casing (2), in which the device is characterized in that it comprises: an inlet mouth (3) that can be coupled to the outlet pipe of the casing (2), through which the fluid enters, an outlet (4) through which the fluid exits, some cameras (5, 6, 7), and a floating piston (8) that moves in the longitudinal direction inside the chambers (5, 6, 7) so that depending on its position inside them and with respect to the inlet (3), facilitates a greater or lesser passage of fluid flow and therefore determines a smaller or greater height of the fluid level inside the casing (2). 2. The device of claim 1 further comprising air inlet holes (9, 10) intended to be connected to a pneumatic installation, said air inlet holes (9, 10) connected to different sectors of the piston ( 8) that allow the entry of pressurized air to push the piston (8) in one direction or another depending on which of the air inlet holes (9, 10) the pneumatic installation applies pressure to. 3. The device of claim 1, wherein the chambers (5, 6, 7) comprise a main chamber (5), an intermediate chamber (6) connected to the main chamber (5) and a rear chamber (7) connected to the intermediate chamber (6), and the plunger (8) comprises a front sector (11) of preferably conical configuration that moves inside the main chamber (5) and inside the inlet mouth (3), an intermediate sector (12) that moves guided inside the intermediate chamber (6) and a rear sector (13) that moves guided inside the rear chamber (7). 4. The device of claim 1, further comprising a tank (14) that houses the main chamber (5) inside and has the inlet mouth (3) and the outlet mouth (4) connected, an intermediate body (15) coupled to the tank (14) that houses the intermediate chamber (6), and a posterior body (16) coupled to the intermediate body (15) that houses the posterior chamber (7). 5. The device of any one of claims 2 to 4, wherein the air inlet holes (9, 10) comprise a first air inlet hole (9) located in the rear body (16) through which it circulates pressurized air against the rear sector (13) of the piston (8) in the closing direction and a second air inlet hole (10) located in the intermediate body (15) through which pressurized air circulates against the intermediate sector ( 15) of the piston in the opening direction. 6. The device of claim 5 in which the intermediate sector (12) of the piston (8) incorporates a projection (17) on its external surface against which the pressurized air strikes when it is desired to push the piston (8) in sense of openness. 7. The device of any one of claims 2 to 4, further comprising a complementary bushing (18) that is inside the reservoir (14) that incorporates part of the intermediate chamber (6) that it shares with the intermediate body ( 15) to facilitate the guided displacement of the piston (8) inside it and which is equipped with transverse passages (19) that facilitate the exit of the pressurized air that circulates through the rear and intermediate chambers (16, 15) towards the chamber (5).