MX2011004780A - Hydraulic fluid sealing and transmission device for a horizontal rotary flow line. - Google Patents

Abstract

The present invention relates to a hydraulic fluid sealing and transmission device for a horizontal rotary flow line, which is disposed on a fixed base that allows, along with a second device having the same configuration, two lines of the same fluid to be controlled, the first line being a feed line and the second line a return line, so that each device operates through the joint of a fixed rotary flow line which undergoes continuous and progressive rotation of from about 0 ° to 90 °, said device comprising: a base element with a fluid passageway at the inner portion thereof, and configured for receiving both a fluid from a flow line when the fixed device operates as a feed flow line, or for receiving a fluid from a rotary flow line when the device operates as a return flow line; a mechanical seal which is partially disposed on the base portion, which allows the fluid to flow between the fixed and rotary lines, said flow lines being in charge of directing the flowing work to a predet ermined place for the treatment thereof or, from such predetermined place to a place for the final use of the fluid; and a lid member through which the arrangement of the rotary flow line with the device as a single unit is defined, as the lid member is coupled to the base element using four threaded screws.

Description

Hydraulic fluid sealing and transmission device for horizontal flow rotating line TECHNICAL FIELD OF THE INVENTION The present invention relates generally to a mechanical seal assembly, and in particular, to a hydraulic fluid sealing and transmission device designed for installation in dynamic applications, wherein said device allows the joining of a fluid line fixed with another line that undergoes a continuous, bidirectional and progressive turn that goes from 0 +/- 90 °.

BACKGROUND OF THE INVENTION A mechanical seal is a device that allows to unite systems or mechanisms, avoiding the leakage of fluids, containing the pressure that is generated during and from a specific flow, consequently the lines of mechanical seals are classified, according to their application, for domestic use and industrial, for automotive use, for air and refrigeration compressors, and for chemical processes.

In the case of industrial and chemical processes, where leakage control is extremely important given the nature of the working fluid which can be toxic, corrosive or explosive, the seals are normally subjected to critical working conditions so some of the they are hydraulically balanced to withstand high pressures, they can also be manufactured with the right materials to withstand extremely high or low temperatures.

The design and application of this type of seals in the handling of hydraulic fluids is reflected to this day in the following documents: US Patent 4,426,092 discloses a mechanical seal assembly having rotary sealing ring means mounted for rotation on an axle and in a stationary sealing ring means connected with a flange cover, the sealing ring means having sealing surfaces. sealed opposite. The assembly also has means for urging the sealing surfaces towards each other. The rotary sealing ring means are of stepped configuration and are constructed as an integral pair of ring portions of equal axial length, one portion having its internal and external diameters larger than the respective diameters of the other. Generally, the ring portion having the smallest internal and external diameter is that portion of the ring that has the sealing surface that opposes the surface of the stationary sealing ring center. The degree of deviation of the sealing surface due to load or hydraulic pressure can be selected from the diameters of the pairs of ring portions.

Another is US Patent 4,993,720 which discloses a cylindrical joint constructed to be used in coaxial relation to a rotary shaft of a pump shaft assembly having a fixed pump cover; said gasket comprises means for securing a substantially flat surface of the gasket in a face-to-face relationship against a fixed adjusting surface of the pump casing; the gasket includes three annular grooves etched in said substantially planar surface in a concentric and coaxial relationship with the main axis of the gasket, having two external grooves and a central groove between the two outer grooves, each groove having an annular bottom part within the groove. spaced joint and facing fixed setting surface; the means comprise an "O" ring of elastomeric material sized to seat securely in each of the external grooves, each "O" ring has an internal surface facing the respective lower part of the groove into which the ring is inserted " O "respective and has an external surface facing the fixed setting surface; means for interposing a viscous liquid in the external grooves between the inner surface of the "O" ring and the bottom of said grooves so that a portion of the outer surface of the "O" ring is compressed against the fixed fit surface of the pump cover; and means constructed to supply a desired amount of a fibrous composite to the central groove, being separated from the media by the interposition of a viscous liquid, the fibrous compound being in sealing contact between the surface of the gasket and the fixed fit surface of the gasket. the cover of the pump.

On the other hand the patent US 5,333,882 describes a mechanical seal assembly having double seals in which the seal faces of the primary seal members remain essentially perpendicular to the axis of the equipment that is sealed regardless of any misalignment between the shaft and the equipment. , has a sleeve to mount on the shaft to provide a support structure where all the primary faces of the Seal member are aligned with respect to this support structure regardless of the load. The primary seals are partially deflected towards the support structure by the combination of the net hydraulic pressure on the coupled faces of the seal plus a deviation from a source of minimum deviation, such as pressure springs, at one end of the sleeve.

The patent 5,560,661 describes a seal formed between the external surface of a tube and the inner surface of a mechanical lining of a high-pressure liquid or a hydraulic system by applying a very thin soft layer of metal on the external surface of the hard tube. of metal and / or the inner surface of the hard metal lining. The thickness of such a thin layer of metal is independent of the size of the tube and / or fittings.

Finally, US Pat. No. 6,422,568 describes a mechanical seal assembly for sealing sealing rotation axes with respect to their shaft covers, wherein the axes of rotation are exposed to substantial axial vibrations. The mechanical seal assembly generally includes a rotary sealing ring attached to the shaft, a non-rotating sealing ring adjacent to and in close contact with the rotating sealing ring to form an annular seal on the shaft, and a mechanical diode element that applies a force that deflects the non-rotating sealing ring by means of a hemispherical joint. The alignment of the mechanical diode with respect to the closing rings is maintained by a series of linear bearings positioned axially along a desired length of the mechanical diode. Alternative embodiments of this invention include mechanical or hydraulic amplification components for amplifying the axial dislocation of the non-rotating sealing ring and transferring it to the mechanical diode.

As can be seen from the aforementioned prior art documents, there are currently various types of mechanical seals that also adapt to diverse and very varied application needs in the field of fluid handling, however, of all they warn a specific approach to the elements and characteristics of mechanical seals and not of devices that from a specific structural configuration that includes the implementation of a mechanical seal, allow the union of a fixed fluid line with another line that undergo a continuous, bidirectional and progressive rotation of 0 +/- 90 ° when said flow line is operating in a horizontal arrangement, which is why, as a device for sealing and transmitting hydraulic fluid for a rotating flow line horizontal, this novel invention is presented with which the following are intended: Objectives of the invention.

An object of the present invention is to provide a hydraulic fluid sealing and transmission device designed for installation in dynamic applications. Another object of the present invention is to provide a hydraulic fluid sealing and transmission device for horizontal flow rotating line, where starting from a specific structural configuration comprising the implementation of a mechanical seal, said device allows the union of a line of fixed flow with another line that undergoes a continuous, bidirectional and progressive rotation of 0 +/- 90 °.

Another objective of the present invention is to provide a hydraulic fluid sealing and transmission device for horizontal flow rotating line, which when placed on a fixed base allows in combination with a second device of the same configuration, control two lines of a same fluid, that is, a power line and another return line.

Another object of the present invention is to provide a hydraulic fluid sealing and transmission device for horizontal flow rotating line, which as a result of its structural configuration still operating in critical conditions prevents any leakage of working fluid.

Still another object of the present invention is to provide a hydraulic fluid sealing and transmission device for horizontal flow rotating line, where from the material from which it is manufactured it is possible to operate in extreme conditions of pressure and temperature.

The objects of the present invention referred to above and even others not mentioned, will be evident from the description of the invention and the figures that illustrate and not restrictive accompany it, and that are presented below.

Brief description of the figures.

Figure 1. A conventional perspective of a hydraulic fluid sealing and transmission device for horizontal flow rotating line, made in accordance with the present invention is shown.

Figure 2. A conventional perspective of two devices is shown as shown in Figure 1, where a broken line represents a possible fixed base on which these devices can be arranged to control two lines of the same fluid. say, one power line and another return line.

Figure 3. An exploded view of the elements that make up the device of Figure 1 is shown.

Figure 4. An exploded view of various elements that make up the device of Figure 1 is shown, where the arrangement of a mechanical seal with respect to a base element can be seen.

Figure 5. A top plan view of the base element of the device of Figure 1 is shown, where the entrance to a second flow distribution chamber and the arrangement of one of the two parts that make up the mechanical seal can be seen.

Figure 6. An exploded view of other elements that make up the device of Figure 1 is shown.

Figure 7. A conventional perspective of the assembly of the elements of Figure 6 is shown.

Figure 8. A front elevation view of various elements that make up the device of Figure 1 is shown, where the disposition of a rotating line of feed flow and its connection with a mechanical seal can be seen.

Figure 9. A conventional perspective of the mechanical seal that is integrated into the device of Figure 1 is shown.

Figure 10. A conventional perspective of the mechanical seal that is integrated into the device of Figure 1 is shown, where the internal configuration of said seal is appreciated.

Detailed description of the invention.

According to what is illustrated in figures 1 to 10, the hydraulic fluid sealing and transmission device for horizontal flow rotating line 100, object of the present patent application, hereinafter referred to as device 100, is disposed on a fixed base 10 wherein in combination with a second device of its same configuration 101 allows to control two lines of the same fluid, that is, one power line and another return line, in such a way that each device 100 operates through the union of a fixed flow line 5 with another rotating line 6 that undergoes a continuous and progressive rotation from 0 to 90 °, said device 100 comprising: a base element 20 inside of which a fluid path is configured to receive from It does not simulate both a fluid coming from a fixed flow line 5 when the device 00 works as a flow supply line, or a fluid coming from a line. a rotating flow 6 when the device 100 works as a flow return line; a mechanical seal 40 which is partially disposed on the base 20 and which allows the transmission of fluid between the fixed flow 5 and rotating 6 lines, these flow lines being those that direct the working fluid in circulation to a predetermined destination for its treatment, or, from said predetermined destination to a place of final use of the fluid (not illustrated), thereby confirming that the device 100 can operate both to transmit a fluid from the fixed line 5 to the rotating line 6 or from the rotating line 6 to the fixed line 5, as the case may be and the specific needs for operation from the device; and a lid element 50 through which the arrangement of the rotary flow line 6 and the integration of the device 100 into a single unit is defined, since this lid member 50 is coupled from four threaded screws 60 with the base element 20. Taking as reference what is illustrated in figures 1 to 5, the base element 20 that integrates the device 100, is formed from a hollow main body 21 of cylindrical shape comprising close to one of its lateral ends an internal circular wall 22, through which said main body 21 is divided into a first connection chamber 23 and in a second distribution chamber 24 of working fluid. Near the periphery of the first connection chamber 23, a plurality of holes 25 are formed in a radial arrangement, through which and by means of respective screw-in captives 26 this base element 20 of the device 100 is fixed to an element of support 27 of the fixed base 10, in such a way that once the connection between the device 100 and the fixed base 10 is ensured, the non-rotating condition of the flow line 5 that joins the main body 21 and that provides working fluid to the second distribution chamber 24 or receives it.

At the opposite terminal end of the main body 21 to which the inner circular wall 22 is disposed, a flat-shaped lid 27 in the form of a donut is configured as part of it, in such a way that close to its central bore there has been configured a step 28 defining a seating surface for the fixed head 41 of the mechanical seal 40, furthermore on the flat face of said assembly cover 27 four holes 29 are equidistantly distributed equally close to its periphery.

In relation to the rotary line 6 of flow of the device 100 and according to what is illustrated in figures 1 to 3 and 6 to 8, this flow line is integrated from a duct 51 of constant circular section that serves to guide to a destination of treatment, or to an end-use destination the fluid coming from the second chamber of distribution 24 of working fluid or of a treatment destination (not shown) as the case may be, in such a way that one of the the terminal ends of this duct 51 is introduced into the moving head 42 of the mechanical seal 40, while on said duct 51 there is also permanently arranged a coupling ring 52 of frustoconical configuration, the larger base of which is abutting with the movable head 42 of the mechanical seal 40, that is, that the minor base of this coupling ring 52 points towards the free end of the duct 51 that is inserted into the central hole of the cap member 50 of flat shape in the shape of a donut, in such a way that the central hole of this lid 50 has a frustoconical configuration that facilitates a non-slip coupling of this cover 50 with the ring 52 of the duct 51, thus preventing possible movements of misalignment between the fixed heads 41 and mobile 42 of the mechanical seal 40 through which fluid transmission is carried out between a fixed line and a rotating line in its horizontal arrangement.

Although, the coupling ring 52 and the frustoconical configuration of the central hole of the lid element 50 define the alignment of both heads of the mechanical seal 40, this does not ensure its permanence, which is why, on said lid element 50, they have configured on its flat face four holes 53 equidistantly distributed near its periphery, where these four holes 53 have the same diameter and arrangement as the four holes 29 of the assembly lid 27, that is, they are aligned, in such a way that with the implementation of four threaded screws 60 that are arranged through of said sets of holes as illustrated in Figures 1 and 2 and with the help of external nuts 61 ensures the alignment of the heads of the mechanical seal 40 and the integration of the different elements of the device 100 into a single unit.

Thus from the above described, it is noted that the mechanical seal 40 composed of a fixed head 41 and a moving head 42 is the element from which the transmission of a hydraulic fluid between a fixed flow line 5 and a flow line 6 that undergoes a continuous, bidirectional and progressive rotation of 0 +/- 90 °, without during said transmission of fluid there is leakage or spill of the transmitted fluid.

In a preferred embodiment of the invention and with the exception of the mechanical seal 40 that is made of bronze in virtue of how favorable the coefficient of expansion of this material can be, all elements that make up the device 100 have been made of copper and the seal Mechanical implemented is multiresortes of type SP-9, however, it should be understood that the materials used, the type of mechanical seal implemented and the dimensions of the device 100 may always vary depending on the work characteristics specified for said device 100.

Thus, from the configuration described above for each of the elements that make up the device 100, the function that each of them independently performs and the result obtained from their integration, it is possible to determine that all the objectives of the invention originally defined and still others not specified are fulfilled, obtaining a device for sealing and transmission of hydraulic fluid for horizontal flow rotating line, completely new and different from those known up to now.

Claims (10)

1. A device for sealing and transmission of hydraulic fluid for horizontal flow rotating line, of the type that are arranged on a fixed base and that allows the union of a fixed flow line with another line that undergoes a continuous, bidirectional and progressive turn 0 +/- 90 °, which is characterized in that it comprises a base element inside which is configured a fluid path that receives not simultaneously both a fluid from a fixed flow line and a fluid from of a rotating flow line; a mechanical seal that is partially arranged on the base and that allows the transmission of fluid between the fixed and rotating flow lines; and a lid element that is coupled from four threaded screws to the base element, said lid member allowing the integration of the different elements of the device in a single unit.
2. The hydraulic fluid sealing and transmission device for horizontal flow rotating line, as claimed in claim 1, characterized in that the base element is integrated from a cylindrical hollow main body comprising at one of its lateral ends an internal circular wall, which divides the main body into a first connection chamber and into a second working fluid distribution chamber, where close to the periphery of the first connection chamber has been configured in a radial arrangement a plurality of holes, and at the opposite terminal end of said main body to which the inner circular wall has been disposed, a flat donose-shaped assembly lid is formed as part thereof.
3. The hydraulic fluid sealing and transmission device for horizontal flow rotating line, as claimed in claim 2, characterized in that through the holes that are located near the periphery of the first connection chamber and The base element is fixed to a support element of the fixed base by means of two screw-in prongs.
4. The device for sealing and transmitting hydraulic fluid for horizontal flow rotating line, as claimed in claim 2, characterized in that close to the central bore of the flat donut-shaped assembly lid, has been configured a step defining a seat surface for the fixed head of the mechanical seal, where four holes equally distributed equally close to its periphery have been formed on the flat face of said assembly cover.
5. 5. The hydraulic fluid sealing and transmission device for horizontal flow rotary line, as claimed in claim 1, characterized in that the rotating flow line of the device is integrated from a duct of constant circular section that guide the working fluid and where one of its terminal ends is introduced into the moving head of the mechanical seal, while on the said duct there is also permanently arranged a coupling ring of frustoconical configuration, in such a way that the free end of the duct is inserted into the central hole of the donut-shaped flat configuration lid element.
6. 6. The hydraulic fluid sealing and transmission device for horizontal flow rotating line, as claimed in claim 1, characterized in that the central hole of the cover has a frustoconical configuration that facilitates a non-slip coupling between it and the truncated cone ring of the pipeline.
7. 7. The hydraulic fluid sealing and transmission device for horizontal flow rotating line, as claimed in claim 1, characterized in that on the. four flat holes have been configured on its flat face equidistantly distributed close to its periphery, so that with the implementation of four threaded screws and with the help of external nuts the alignment of the mechanical seal heads and the integration of the different elements of the device in a single unit when said lid element is joined to the base element.
8. 8. The hydraulic fluid sealing and transmission device for horizontal flow rotating line, as claimed in claim 1, characterized in that the mechanical seal is made of bronze.
9. 9. The hydraulic fluid sealing and transmission device for horizontal flow rotating line, as claimed in claim 1, characterized in that all elements that make up the device are made of copper.
10. 10. The hydraulic fluid sealing and transmission device for horizontal flow rotating line, as claimed in claim 1, characterized in that the mechanical seal implemented is multiresortes type SP-9.