End face mechanical seal device, end face mechanical seal, and method for installing end face mechanical seal device

Abstract

Mechanical seal device, end face mechanical seal, and method for installing end face mechanical seal device The present invention begins with a mechanical seal device (12) having a resilient element (14) and a housing unit (16). In order to provide a versatile device with improved characteristics in terms of design, it is proposed that the mechanical seal device (12) has a support element (18) for pretensioning the elastic element (14) within the housing unit (16).

Description

[Technical field]

[0001] The present invention relates to a mechanical seal device according to the preamble of claim 1, to a mechanical seal according to claim 13 and to a method for mounting a mechanical seal device according to claim 14. [Background technology]

[0002] Mechanical seals are known from the prior art, which comprise a spring and a housing consisting of at least two parts. To pretension the spring in the housing, the spring can first be inserted into a first part of the housing, and then the second part of the housing can be subsequently connected to the first part of the housing, for example by a screwed and / or welded connection. The disadvantage of this procedure for pretensioning the spring is that the housing is fragmented and that the installation, in particular the assembly and / or manufacture of the mechanical seal is complicated. Furthermore, to pretension the spring, it is also known from the prior art to use a one-piece housing with a number of holes and individual spring parts, in particular a number of springs, which can be inserted into the holes of the housing. The disadvantage here too is that the installation, in particular the assembly and / or manufacture of the mechanical seal is complicated and cumbersome, as well as the increased costs and / or material costs. Summary of the Invention

[0003] The object of the present invention is to provide a universal device, which has improved properties, in particular with regard to its design. According to the invention, this object is achieved by the features of claims 1, 13 and 14, while advantageous refinements and developments of the invention can be taken from the dependent claims.

[0004] The present invention is based on a mechanical seal device, which comprises a resilient element and a housing unit. It is proposed that the mechanical seal device comprises a support element for pretensioning the elastic element in the housing unit.

[0005] Such refinements can improve the design and provide a simple, comfortable, efficient and / or user-friendly design. Furthermore, the installation and in particular possibly also the removal can be optimized and a high degree of ease of installation and in particular possibly also removal can be provided. Furthermore, costs can be reduced in terms of installation costs and in terms of removal costs as well, and the efficiency can be increased in terms of product efficiency and / or work efficiency and / or cost efficiency. Furthermore, the installation, in particular the pre-tensioning of the elastic element in the housing unit, can be made easier and more efficient, so that the time spent, i.e. in particular the time spent during installation, can be reduced. Furthermore, such refinements can provide a mechanical seal device which can be applied also under difficult operating conditions, such as, for example, high ambient temperatures, high operating pressures, high shaft rotational / circumferential speeds and / or difficult conveying media, preferably during use / operation on one shaft. In this way, the flexibility can be increased in terms of the possible uses of the mechanical seal device. Furthermore, the mechanical seal device can preferably be used on shafts having metric dimensions.

[0006] Preferably, the mechanical seal device is a part of a mechanical seal and forms a subassembly of the mechanical seal. However, it is also conceivable that the mechanical seal device constitutes the entire mechanical seal. In particular, the mechanical seal is provided for use and / or mounting on a shaft, without being limited thereto. The shaft may be a drive shaft, preferably a pump shaft. In particular, the shaft is a rotating shaft. The shaft may have one or more shaft grooves, extending in a circumferential direction with respect to the axial direction of the shaft, in particular for fixing one or more seals, for example one or more mechanical seals. By "shaft groove" is to be understood a recess in the shaft. The shaft groove may extend in a circumferential direction over the entire circumference of the shaft. Advantageously, the shaft groove is formed rotationally symmetrically with respect to the longitudinal axis. Alternatively, the mechanical seal may also be arranged on a shaft on which no shaft groove is present.

[0007] The shaft can be provided for use in a drive unit, which in this case has at least one drive means, which rotates the shaft in the operating state. The drive means for example have at least one electric motor and / or an internal combustion engine and / or a bearing block. Preferably, the shaft is rotatably supported relative to the remaining drive unit about its longitudinal axis, which is oriented parallel to the axial direction, in particular by at least one plain and / or roller bearing of the drive unit. Particularly preferably, the shaft performs a rotational movement along the circumferential direction in the operating state. In particular, the shaft is formed as an elongated element, the longitudinal axis of the shaft being oriented parallel to the axial direction. The drive unit can be part of any desired mechanical system known to the person skilled in the art. Preferably, the drive unit is part of a pump system, for example for conveying a fluid.

[0008] Preferably, the shaft is coupled to a working unit, which has a working means and is configured to perform a work in the operating state. It is conceivable that the shaft is indirectly coupled to the working unit, in particular to the working means, for example by a power transmission. Advantageously, the shaft is directly coupled to the working unit, in particular to the working means. Preferably, the working unit has a hub for fastening to the shaft. The working means can be formed as any desired working means known to the person skilled in the art. Preferably, the working means is formed as a rotor, in particular a pump rotor. The rotor, in particular a pump rotor, can be part of a pump system. Advantageously, the working unit is part of a mechanical system, preferably a pump system. It is also conceivable, if necessary, that the working unit, in particular the rotor, functions alternatively as a drive unit for driving the shaft.

[0009] The mechanical seal can be usable in a mechanical system, preferably a pump system. The mechanical system can comprise at least a mechanical seal. In particular, the mechanical system, in particular the pump system, comprises a shaft. The shaft can be configured to connect a drive unit to a working unit. Preferably, the mechanical seal is configured to at least partially, advantageously completely, seal the shaft, in particular the rotating shaft, against a wall, for example against a machine housing of the mechanical system. The mechanical seal serves in particular to seal a working chamber of the mechanical system, in particular of the pump system, from the surrounding medium and / or further chambers, in particular from an electronics housing of the mechanical system, in particular of the pump system. The working unit, in particular the rotor, can be at least partially arranged in the working chamber. Advantageously, the drive unit is at least partially arranged in the electronics housing.

[0010] In some cases, it is conceivable that a mechanical system, in particular a pump system, comprises at least two mechanical seals in a tandem arrangement. The first mechanical seal can be arranged on the working side, in particular on the rotor side, on the shaft. The second mechanical seal can be arranged above the first mechanical seal in the height direction. In particular, the second mechanical seal is arranged on the drive side of the shaft. Due to the position and / or arrangement of the mechanical seals on the shaft in the mechanical system, in particular in the pump system, the mechanical seals may be exposed to different conditions and may have to meet different sealing requirements. In particular with regard to the aforementioned tandem arrangement, the sealing requirement of the first mechanical seal may be higher than the sealing requirement of the second mechanical seal. Alternatively, it is also possible that the sealing requirement of the second mechanical seal is higher than the sealing requirement of the first mechanical seal. The first and second mechanical seals may be aligned in different ways. Particularly preferably, the first mechanical seal is aligned according to the invention described herein. Furthermore, the at least second mechanical seal may also have a similar configuration as the first mechanical seal.

[0011] The first mechanical seal and the second mechanical seal can each comprise at least an identical mechanical seal arrangement. The support element according to the mechanical seal arrangement is configured to pretension the elastic element in the housing unit. Advantageously, the housing unit is formed integrally, preferably in a single piece. "Integally" is to be understood as connected in an at least materially joined manner, for example by an adhesive bonding process, an injection molding process, and / or a welding process, and / or another process deemed appropriate by the skilled person. "In a single piece" is to be understood in this case as formed integrally. Preferably, this integral part is manufactured from a single blank, ingot, and / or casting, particularly preferably by an injection molding process, in particular a single-component and / or multi-component injection molding process, and / or a punching process, and / or another process deemed appropriate by the skilled person.

[0012] The housing unit can be at least partially or predominantly made of plastic, mineral, metal, preferably stainless steel, particularly preferably stainless steel with high acid resistance, and / or composite materials. In this case, the expression "predominantly" is to be understood as meaning a volume fraction and / or mass fraction of, for example, at least 55%, advantageously at least 65%, preferably at least 75%, particularly preferably at least 85%, particularly preferably at most 95%. Preferably, the housing unit is manufactured precisely, in particular from a blank, by a turning, drilling and / or milling process.

[0013] The housing unit may have at least one or more openings into which in each case at least one corresponding threaded pin of the mechanical seal can be inserted, preferably reversibly, and in particular screwed in. The threaded pin may be a grub screw or a worm screw, in particular a headless screw. The threaded pin may be configured to fix the mechanical seal device, in particular at least the housing unit, on the shaft against rotation.

[0014] In this case, an "elastic element" is an element which can be repeatedly deformed without the element being mechanically damaged or destroyed as a result and which, in particular, tends to automatically return to its basic shape after deformation. In particular, the elastic element is flexible. Preferably, the elastic element is configured as a spring, for example as a spiral spring.

[0015] The elastic element can be pretensioned by being compressed in the housing unit by the support element. In the mounted state, the support element and at least the elastic element can be mounted in the housing unit, and the elastic element can be pretensioned in the housing unit by the support element. The support element can inhibit and / or prevent complete relaxation of the elastic element in the housing unit. In particular, the support element is formed differently from the housing unit. Preferably, the support element and the housing unit are two structural units / components that are separate from each other.

[0016] In this case and hereinafter, "configured" should be understood to mean specifically programmed, designed and / or equipped. The fact that an object is configured for a particular function should be understood to mean that the object performs and / or executes this particular function in at least one application and / or operational state.

[0017] It is conceivable that the support element for fixing in the housing unit advantageously has at least one hook for fastening and / or at least one lug for fastening and / or at least one protrusion, which can engage with a corresponding element of the housing unit for fastening and / or retention. For example, the support element can be fastened in the housing unit by means of a bayonet connection. Likewise, a press-fit connection and / or a mating connection and / or an integrally joined connection, such as, for example, a screw connection and / or an adhesive connection, can be conceivable for fastening the support element in the housing unit. The support element can also be fastened permanently, in particular irreversibly, in the housing unit.

[0018] The support element can also be reversibly insertable into and removable from the housing unit. The support element can possibly also be removable in a non-destructive manner. Preferably, the support element has to be destroyed when removed from the housing unit. In particular, the support element is destructible when removed from the housing unit. Furthermore, the elastic element can be reversibly insertable into and removable from the housing unit, in particular in a non-destructive manner. Furthermore, it is proposed that the housing unit has a recess for receiving the support element. As a result, the design can be further improved and the accommodation, in particular the retention and / or fixation, of the support element in the housing unit can be provided. In this way, safety for the operator and / or mechanic can be increased. Furthermore, by accommodating the support element in a recess, at least one elastic element can be held in the housing unit. Furthermore, the installation can be made easier and more comfortable, thus increasing efficiency and reducing installation costs.

[0019] The support element can be insertable, preferably hookable, in the recess. The support element can be inserted into the recess during the mounting method. The recess is configured to receive the support element, in particular in the mounted state. In particular in the mounted state, the support element is inserted and advantageously hooked in the recess. Preferably, the support element, which is arranged in the recess, in particular inserted and / or hooked, is configured to prevent at least the elastic element from being released and / or jumping out of the housing unit in the mounted state.

[0020] It is further proposed that the recess is formed at least partially, preferably completely, as an annular groove. As a result, a design can be optimized in the sense that the accommodation, in particular the holding and / or fastening, of the support element in the housing unit can be improved and designed in a safer manner. Furthermore, a compact and / or simple design can be provided for the holding and / or fastening of the support element in the housing unit.

[0021] The recess can be formed as an annular groove at least partially, in particular at least to the extent of 50%, advantageously at least to the extent of 70%, preferably at least to the extent of 80%, in the circumferential direction of the housing unit, and particularly preferably the recess is formed as an annular groove in the entire circumferential direction of the housing unit.

[0022] In principle, different size configurations of the mechanical seal device, in particular the mechanical seal, are conceivable, in particular with respect to different sized shaft configurations. In particular, different sizes of mechanical seal devices must be used depending on the shaft diameter of the shaft. Preferably, the mechanical seal device is placeable and / or usable on a shaft having a shaft diameter of at least 5 mm. In this specification, values ​​for specific size / configurations of the mechanical seal device, in particular the mechanical seal, are specified as examples. Naturally, these values ​​can be adapted and / or changed depending on the shaft diameter, in particular so that the mechanical seal device can be placed on a shaft having a corresponding shaft diameter. Furthermore, with respect to the ranges of values ​​specified in this specification, values ​​that are within the aforementioned limits should also be considered as disclosed and can be used as necessary.

[0023] For example, the housing unit may have an inner diameter of at least 10 mm, advantageously at least 30 mm, preferably at least 60 mm. Furthermore, the inner diameter of the housing unit may be at most 120 mm, advantageously at most 160 mm, preferably at most 200 mm. The outer diameter of the housing unit may be, for example, at least 15 mm, in particular at least 35 mm, advantageously at least 60 mm, preferably at least 120 mm. The outer diameter of the housing unit may have a value of at most 150 mm, advantageously at most 200 mm, preferably at most 260 mm. The recess formed as a groove may have a width of at least 0.3 mm, advantageously at least 0.5 mm, preferably at most 4 mm.

[0024] When inserting at least the support element into the housing unit, at least the support element can slide at least partially along a surface, in particular an inner surface, of the housing unit, which inner surface can be a surface of the housing unit on the inside of the housing unit. During the insertion, at least the support element can be guided at least partially along the inner surface of the housing unit.

[0025] If the housing unit has at least one surface section for guiding the support element during insertion into the housing unit, installation can be made easier, installation costs can be reduced, comfort can be increased, an improved design can be provided, and damage and / or wear of the support element during insertion into the housing unit can be reduced and advantageously prevented.

[0026] Preferably, this surface section is a part of the inner surface. This surface section may be directly adjacent to at least one further surface section of the housing unit, in particular on the inner surface. This surface section and the at least further surface section may have the same surface characteristics. It is also conceivable that this surface section and the further surface section have different surface characteristics. The surface characteristics may include, for example, a smooth or rough characteristic.

[0027] At least this surface section is configured to help guide the support element during insertion into the housing unit, particularly preferably during insertion of the support element into the recess. During insertion, at least the support element can slide along at least the further surface section. Advantageously, at least the support element slides along this surface section during insertion, in particular after the further surface section. In the mounting method, the support element can be pushed along the surface section for insertion into the recess. In particular, in the mounting method, at least the support element is pushed along the further surface section and then subsequently pushed along the surface section.

[0028] It is also possible for this surface section to be spaced apart from the recess in the housing unit. Advantageously, this surface section adjoins at least partly directly, in particular directly, the recess. In order to guide the support element during insertion into the housing unit, advantageously into the recess, this surface section may have a gradient / incline to the further surface section, in particular depending on the point of view. Preferably, the housing unit comprises a concentric reduction in this surface section. This reduction can be referred to as a cone, advantageously as a cone-shaped section. In particular, this reduction is formed as a conical transition piece. The inclination angle, in particular the one-sided inclination angle, may have at least 5°, advantageously at least 8°, preferably at least 10°, particularly preferably at least 12°. Preferably, the inclination angle is at most 15°, in particular at most 20°.

[0029] A compact design can be provided and the support element can advantageously be arranged in the housing unit in a simple and efficient manner if the support element at least partially abuts against an outer radial edge of the housing unit, in particular the outer radial edge being an outer edge on the inner surface of the housing unit.

[0030] To further improve the design and further simplify and / or make the installation more comfortable, it is proposed that the support element is deformable for insertion into the housing unit. Furthermore, the service life of the support element can therefore be improved, and the support element can be repeatedly inserted into the housing unit. In this way, costs can be reduced in terms of material costs and / or manufacturing costs. Advantageously, the support element is deformable in a non-destructive manner during insertion into the housing unit. It is also conceivable that at least the housing unit is further deformable at least during insertion of the support element. The support element can be deformable so that it can be inserted into the recess.

[0031] The support element can be formed to correspond to the recess. Preferably, the support element has an annular shape at least partially, preferably completely. The design can therefore be improved in terms of compactness and / or efficiency. The support element can have an annular shape at least partially, in particular at least to the extent of 50%, advantageously at least to the extent of 70%, preferably at least to the extent of 80%, in the circumferential direction.

[0032] In a preferred refinement of the invention, it is proposed that the support element is formed in the shape of a disk. As a result, in particular a simple and / or thin and / or flat and / or space-saving support element can be provided. Furthermore, costs can be reduced in terms of production and material costs. Furthermore, the design can be further optimized as a result. The support element can abut in the recess at least partially in contact and / or flush against both side walls of the recess. Preferably, the support element is inserted in the recess in a contacting and flush manner. The support element can have a thickness of at least 0.2 mm, advantageously at least 0.3 mm, preferably at least 0.5 mm. Preferably, the support element has a thickness of at most 1 mm, in particular at most 3 mm, particularly preferably at most 4 mm.

[0033] It is further proposed that the mechanical seal device has an intermediate element for transmitting forces to the elastic element, which intermediate element is arranged between the elastic element and the support element. As a result, the design can be further optimized, in particular a direct contact between the support element and the elastic element can be avoided / prevented. Furthermore, preferably by means of the intermediate element, forces, in particular torques, during operation / use of the mechanical seal can be transmitted from the sealing element, in particular preferably the sliding ring, of the mechanical seal via this intermediate element to the housing unit of the mechanical seal device. Furthermore, a fixation of the sealing element, in particular preferably the sliding ring, in the housing unit can advantageously be provided by the intermediate element. Furthermore, a rotation of the sealing element during use / operation of the mechanical seal, for example on the shaft, can be prevented by the intermediate element. In this way, safety can be increased.

[0034] The intermediate element can be formed in the shape of a disk. The intermediate element can have an annular shape. In particular, the intermediate element is formed differently from the housing unit. Particularly preferably, the intermediate element is a drive disk. When inserting the elastic element and the support element into the housing unit, the intermediate element can be arranged between the elastic element and the support element. The intermediate element can be in direct contact with the elastic element at least during insertion into the housing unit. In particular, the intermediate element is configured to transmit forces originating from the support element to the elastic element during insertion, in particular to compress the elastic element due to direct contact during insertion. In the mounting method of the mechanical seal device, it is possible to arrange the intermediate element on the elastic element, it is possible to arrange the support element on the intermediate element, and it is then possible to subsequently insert the elastic element, the intermediate element and the support element together into the housing unit. Alternatively, the elastic element and the intermediate element can be inserted into the housing unit, and then subsequently the support element can be pressed into the housing unit, particularly preferably into the recess. In particular, in the mounted state, the elastic element, the intermediate element and at least the support element are inserted and / or mounted in the housing unit.

[0035] It is possible that the intermediate element is held in the housing unit in the mounted state only by the support element, or the intermediate element can have at least one fixing element or multiple fixing elements for holding and / or fixing the intermediate element in the housing unit.

[0036] Furthermore, the mechanical seal may comprise at least one sealing element. The sealing element may be an at least partially rotatable sealing element, in particular a rotatable sealing ring. Particularly preferably, the sealing element is a sliding ring. The sealing element may also be at least partially insertable into the housing unit. The sealing element may at least partially abut against the intermediate element, in particular at least in the mounted state. The mechanical seal may also have further sealing elements, for example one or more secondary seals. The secondary seal may be, for example, an O-ring. It is conceivable that at least one secondary seal may likewise be inserted into the housing unit, particularly advantageously at the same time as the sealing element, during the insertion of the sealing element into the housing unit. The secondary seal may for example be arranged between the housing unit and / or the support element and / or the sealing element. Preferably, the secondary seal abuts against the housing unit, in particular at least partially against the surface section and / or the further surface section and / or the support element and / or the sealing element.

[0037] The sealing element, in particular the sliding ring, may at least partly, advantageously at least predominantly consist of minerals and / or metals, advantageously semi-metals and / or plastics and / or compounds and / or composite materials.

[0038] Furthermore, it is proposed that the support element is in direct contact with the intermediate element at least during insertion into the housing unit. As a result, an optimal force transmission from the support element to the elastic element during insertion can be provided. Furthermore, the installation can be made easier and therefore costs can be reduced and efficiency can be improved in terms of work efficiency and / or product efficiency and / or cost efficiency. Furthermore, a compact design can be provided.

[0039] It is further proposed that the elastic element presses the intermediate element towards the support element, as a result of which the design can be further improved and provide an optimal force and / or sealing effect during installation / use / operation of the mechanical seal, in particular on a shaft.

[0040] In the mounted state, the support element can be arranged in the recess and the intermediate element can abut against it in a contacting and / or flush manner. In particular, the elastic element presses the intermediate element directly against the support element in the mounted state. Preferably, the support element arranged in the recess, in particular the inserted and / or latched support element, is configured to prevent at least the intermediate element from being released and / or jumping out of the housing unit in the mounted state.

[0041] Preferably, the mounted state is understood to mean the state that exists before the mechanical seal is mounted and / or placed on the shaft. In the mounted state, the support element can pre-tension the elastic element in the housing unit, but the final mounted position and therefore the final position and / or location of the elastic element and / or the intermediate element in the housing unit still remains projected. In particular, the final mounted position is the position and / or location that the intermediate element and / or the elastic element and / or at least the sealing element have when the mechanical seal is assembled and / or placed on the shaft, in particular during operation. Preferably, the final mounted position can only be reached and / or exists during the mounting / use of the mechanical seal on the shaft.

[0042] Furthermore, it is proposed that the intermediate element is movably supported with respect to the support element. As a result, a particularly comfortable, simple and / or efficient design can be provided. Furthermore, the ease of installation can be improved and costs can be reduced in terms of installation costs. Furthermore, tolerances, e.g. manufacturing tolerances, can be compensated for. Furthermore, an efficient and comfortable adaptation to the final installation position during installation / use of the mechanical seal on the shaft can be provided.

[0043] Depending on the tension of the elastic element, in particular the pre-applied tension, the intermediate element can move relative to the support element. In the final installation position, the intermediate element can be spaced apart from the support element. In the final installation position, there can be a distance of at least 0.5 mm, advantageously at least 1 mm, preferably at least 1.5 mm, particularly preferably at least 3 mm between the intermediate element and the support element.

[0044] The mechanical seal may comprise a counterseal element. Preferably, the counterseal element is formed as a counterseal ring. The counterseal element, in particular the counterseal ring, may at least partially, advantageously at least predominantly, consist of a mineral and / or a metal, advantageously a semi-metal and / or a plastic and / or a compound and / or a composite material. At least in the final installation position, the seal element may abut against the counterseal element.

[0045] Furthermore, the invention is based on a method for mounting a mechanical seal device, in particular the aforementioned mechanical seal device, having a housing unit and an elastic element inserted in the housing unit and pretensioned in the housing unit by a support element. Such a method allows for an improved mounting, furthermore a high degree of ease of mounting can be provided, furthermore costs can be reduced in terms of mounting costs and efficiency can be increased in terms of product efficiency and / or working efficiency and / or cost efficiency.

[0046] Here, the mechanical seal device and / or mechanical seal and / or method are not intended to be limited to the uses and embodiments described above, and in particular, the mechanical seal device and / or mechanical seal and / or method may have a different number of individual elements, components, units, and method steps than those mentioned herein to perform the functions described herein.

[0047] Further advantages will be obtained from the following description of the drawings, in which exemplary embodiments of the invention are shown. These drawings, the description and the claims contain numerous features in combination. Those skilled in the art will also consider these features individually and combine them to form further suitable combinations, as appropriate.

[0048] The drawings are as follows: [Brief description of the drawings]

[0049] [Figure 1] 1 shows a mechanical seal having a mechanical seal device. [Diagram 2] FIG. 2 shows the mechanical seal according to FIG. 1 in an exploded view. [Diagram 3] FIG. 2 shows a cross-sectional view of the mechanical seal according to FIG. [Figure 4] The mechanical seal device is shown in an exploded view. [Diagram 5] 1 shows the mechanical seal device in an assembled state. [Figure 6] 1 shows a schematic method flow diagram to illustrate a method of installing a mechanical seal device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0050] In the following, the figures are schematic and not to scale, and unless otherwise specified, only one of the objects present is labeled with a reference number and will be explained in more detail below.

[0051] Fig. 1 shows a mechanical seal 10 having a mechanical seal device 12. According to Fig. 1, the mechanical seal 10 is shown in an installed state, in particular in an assembled state. The mechanical seal 10 is provided for use on and / or installation on a shaft (not shown). Furthermore, the mechanical seal 10 is configured to at least partially, advantageously completely, seal the shaft, in particular a rotating shaft, against a wall, for example a machine housing (not shown) of a machine system, preferably a pump system.

[0052] To better understand the structure / assembly of the mechanical seal 10, FIG. 2 shows an exploded view of the mechanical seal 10 according to FIG. 1, which will be described in more detail below.

[0053] The mechanical seal 10 includes a clamping ring 64. The mechanical seal arrangement 12 includes a housing unit 16. The housing unit 16 includes at least one opening 62 through which a threaded pin 60, such as a grub screw, can be inserted. In this exemplary embodiment, the housing unit 16 includes three openings 62.

[0054] Furthermore, the mechanical seal device 12 comprises an elastic element 14. In this case, the elastic element 14 is formed as a spring, in particular as a spiral spring by way of example. According to FIG. 2, an intermediate element 30 of the mechanical seal device 12 is shown behind the elastic element 14. The intermediate element 30 is formed in the shape of a disk. In this case, the intermediate element 30 is a driving disk. The intermediate element 30 has an annular shape and is formed symmetrically.

[0055] In order to pretension the elastic element 14 in the housing unit 16, the mechanical seal device 12 comprises a support element 18. The support element 18 has an at least partially, particularly preferably completely, annular shape. Furthermore, the support element 18 is formed in the shape of a disk. The support element will be discussed in more detail below.

[0056] According to Fig. 2, the mechanical seal 10 comprises a sealing element 50. In this case, the sealing element 50 is an at least partially rotating sealing ring, in particular a sliding ring. The mechanical seal 10 comprises one or more secondary seals 52. In this exemplary embodiment, the mechanical seal 10 comprises at least three secondary seals 52. In this case, the secondary seals 52 are formed as O-rings.

[0057] Furthermore, the mechanical seal 10 comprises a counterseal element 56. In this case, the counterseal element 56 is formed as a counterseal ring. According to Fig. 2, one of the secondary seals 52 is arranged on the counterseal element 56. Furthermore, the counterseal element 56 abuts against the seal element 50 (see Fig. 3). In this case, one of the secondary seals 52 is part of the counterseal element 56.

[0058] FIG. 2 shows an installation direction 32 in which the mechanical seal device 12, and also the components / structural units for the installation of the mechanical seal 10, can be assembled / installed in sequence.

[0059] Figure 3 shows a cross-sectional view of the entire mechanical seal 10, with the mechanical seal device 12 according to Figure 1, while the installation of the mechanical seal device 12 is explained in more detail by Figures 4 and 5. Furthermore, a schematic flow diagram of a method for installing the mechanical seal device 12 is shown in Figure 6. In this case, the method is explained only by way of example, based on the installation step 100.

[0060] In the mounting step 100, the elastic element 14 is inserted into the housing unit 16 and is pretensioned therein by the support element 18. The elastic element 14, the intermediate element 30 and / or the support element 18 can be inserted into the housing unit 16 along a mounting direction 32 shown in FIG. 4. In the mounting step 100, the intermediate element 30 can first be placed on the elastic element 14 and then both elements can be pressed together into the housing unit 16 and only afterwards the support element 18 can be inserted into the housing unit 16, or alternatively the support element 18, the intermediate element 30 and the elastic element 14 are simultaneously placed together in the housing unit 16, in particular inserted into the housing unit 16.

[0061] The housing unit 16 comprises a recess 20 for accommodating the support element 18 (see Figures 3 to 5). The recess 20 is at least partially, in this case completely, formed as an annular groove. In this exemplary embodiment, the recess 20 formed as a groove has a width 76 of at least 0.5 mm.

[0062] In the mounted state of the mechanical seal device 12 according to Fig. 5, the support element 18 is inserted, in particular latched, in the recess 20. In this case, the support element 18 at least partially abuts against an outer radial edge 28 of the housing unit 16. The support element 18, which is arranged in the recess 20, prevents the intermediate element 30 and the elastic element 14 from being released and / or popping out of the housing unit 16. For insertion into the housing unit 16, in particular in this case into the recess 20, the support element is deformable. Furthermore, it is also conceivable that the housing unit 16 and / or the intermediate element 30 are deformable.

[0063] For guiding the support element 18, in particular for improving and / or making more comfortable the insertion of the support element 18 into the housing unit 16, the housing unit 16 comprises at least one surface section 26. Furthermore, the surface section 26 is configured to guide the support element 18 into the recess 20. Furthermore, the surface section 26 can also be configured to improve and / or make more comfortable the removal of the support element 18 from the housing unit 16, preferably from the recess 20.

[0064] In this case, the surface section 26 is at least partially directly adjacent to the recess 20. The housing unit 16 comprises at least one further surface section 34. In this case, the further surface section 34 is directly adjacent to the surface section 26. When viewed in the mounting direction 32, during insertion, the support element 18 slides first along the further surface section 34 and then subsequently along the surface section 26. In the mounting step 100, at least the support element 18 is pressed along the further surface section 34 and then subsequently along the surface section 26.

[0065] In order to guide the support element 18 during insertion into the housing unit 16, in particular in this case into the recess 20, the surface section 26 comprises a concentric reduction with respect to the further surface section 34, which can be referred to as a cone or even as a cone-shaped portion. In this case, the reduction is formed as a conical transition piece. The inclination angle 68 is at least 10° in this exemplary embodiment.

[0066] According to figures 2 to 5 it can be seen that the intermediate element 30 is arranged between the elastic element 14 and the support element 18. The support element 18 is in direct contact with the intermediate element 30, at least during insertion into the housing unit 16. In this exemplary embodiment, at least during insertion, the support element 18 is in contact only with the intermediate element 30, which is in direct contact with the elastic element 14. The intermediate element 30 is configured to transmit a force to the elastic element 14. At least during insertion, a force originates from the support element 18, is transmitted to the intermediate element 30 and is transmitted by the intermediate element 30 to the elastic element 14. Due to the above-mentioned force transmission, the elastic element 14 is at least partially compressed and inserted into the housing in a mounting step 100.

[0067] In the installed state of the mechanical seal device 12 according to Fig. 5, the elastic element 14, the intermediate element 30 and the support element 18 are inserted into the housing unit 16. The elastic element 14 is pretensioned, at least in the assembled state. Fig. 5 shows that the elastic element 14 presses the intermediate element 30 towards the support element 18. In this case, the intermediate element 30 is supported movably relative to the support element 18. In the installed state, the intermediate element 30 abuts against the support element 18. The elastic element 14 presses the intermediate element 30 against the support element 18 (see Fig. 5). In this installed state, the final installation position of the intermediate element 30 and / or the elastic element 14 remains to be determined. The final installation position is shown in Fig. 3, in which the intermediate element 30 and the support element 18 are spaced apart from each other in this case.

[0068] During further assembly of the mechanical seal 10, at least the seal element 50 is inserted into the housing unit 16. In this exemplary embodiment, the seal element 50 can be inserted into the housing unit 16 together with one of the secondary seals 52. At least the seal element 50 is inserted into the housing unit 16 along the mounting direction 32, in particular until the seal element 50 at least partially contacts the intermediate element 30 (see FIG. 3). Furthermore, a counter seal element 56 can be placed on the seal element 50. In this case, the final installation position can only be reached during mounting / use of the mechanical seal 10 on the shaft.

[0069] The cross-sectional view shown in Fig. 3 shows the final installation position. In this case, the sealing element 50 has further pressed the elastic element 14 together and, as a result of the pressure on the intermediate element 30, has spaced the intermediate element 30 from the support element 18. In the final installation position, the intermediate element 30 is spaced from the support element 18. A width direction 70 and a height direction 72 are shown in Fig. 3. When viewed in the width direction 70, the intermediate element 30 is spaced from the support element 18 in the final installation position. Furthermore, according to Fig. 3, it can be seen that the support element 18 is at least partially arranged above the intermediate element 30 and / or the elastic element 14 when viewed in the height direction 72.

[0070] During installation / use of the mechanical seal 10 on the shaft, the sealing element 50 is pressed further into the housing unit 16, so that the intermediate element 30 is disengaged / pushed away from the support element 18. The sealing element 50 presses the intermediate element 30 in the installation direction 32 away from the support element 18. Furthermore, the sealing element 50 presses the intermediate element 30 towards the elastic element 14, thereby further compressing the latter. During operation of the shaft and during arrangement / use of the mechanical seal 10 on the shaft, in particular on a rotating shaft, the intermediate element 30 is movably supported and can be axially movable, in particular relative to the support element 18, by the elastic element 14 and the sealing element 50.

[0071] Due to such improvements in the mechanical seal device 12, and even the mechanical seal 10, the mechanical seal device 12, and even the mechanical seal 10, can also be used on a shaft under difficult operating conditions, such as, for example, high ambient temperatures, high operating pressures, high shaft rotational / circumferential speeds, and / or difficult conveying media. [Explanation of symbols]

[0072] 10 Mechanical seal 12 Mechanical seal device 14 Elastic Elements 16 Housing Unit 18 Supporting Elements 20 Recess 26 Surface Section 28 Edge 30 Intermediate Elements 32 Mounting direction 34 Surface Section 50 sealing elements 52 Secondary Seal 56 Counter seal element 60 Threaded Pin 62 Opening 64 Clamping Ring 68 angle 70 Width direction 72 Height 76 Width 100 Installation Steps

Claims

1. A mechanical seal device (12) having a resilient element (14) and a housing unit (16), characterized by a support element (18) for pretensioning the resilient element (14) within the housing unit (16).

2. 2. The mechanical seal device (12) according to claim 1, characterized in that the housing unit (16) has a recess (20) for accommodating the support element (18).

3. 3. The mechanical seal device (12) according to claim 2, characterized in that the recess (20) is at least partially formed as an annular groove.

4. 2. The mechanical seal device (12) of claim 1, wherein the housing unit (16) has at least one surface section (26) for guiding the support element (18) during insertion into the housing unit (16).

5. 2. The mechanical seal device (12) according to claim 1, characterized in that the support element (18) is deformable for insertion into the housing unit (16).

6. 2. The mechanical seal device (12) of claim 1, wherein the support element (18) has an at least partially annular shape.

7. 2. The mechanical seal device (12) according to claim 1, characterized in that the support element (18) is formed in the shape of a disk.

8. 2. The mechanical seal device (12) according to claim 1, characterized in that the support element (18) at least partially abuts against an outer radial edge (28) of the housing unit (16).

9. 2. The mechanical seal device (12) according to claim 1, characterized by an intermediate element (30) for transmitting a force to the elastic element (14), the intermediate element (30) being arranged between the elastic element (14) and the support element (18).

10. 10. The mechanical seal device (12) according to claim 9, characterized in that the support element (18) is in direct contact with the intermediate element (30) at least during insertion into the housing unit (16).

11. 10. The mechanical seal device (12) according to claim 9, characterized in that the elastic element (14) urges the intermediate element (30) towards the support element (18).

12. 10. The mechanical seal device (12) according to claim 9, characterized in that the intermediate element (30) is supported movably relative to the support element (18).

13. A mechanical seal (10) comprising a mechanical seal device (12) according to any one of claims 1 to 12.

14. 13. A method for mounting a mechanical seal device (12), in particular according to any one of claims 1 to 12, comprising a housing unit (16) and an elastic element (14) inserted into said housing unit (16) and pretensioned within said housing unit (16) by a support element (18).

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