阅读说明：本技术 高压室中的定位 (Positioning in a high pressure chamber ) 是由 马蒂亚斯·约翰内斯·布格哈德 约阿希姆·登克 马尔科·费斯塔 于 2020-02-17 设计创作，主要内容包括：本发明涉及一种用于确定在高压室(H)中能移动的物体(2)的位置的装置(1)。本发明还涉及一种将该装置(1)用于确定在高压室(H)中能够旋转的、磁性支承的轴的位置的应用。(The invention relates to a device (1) for determining the position of an object (2) that can be moved in a high-pressure chamber (H). The invention also relates to the use of the device (1) for determining the position of a magnetically mounted shaft that can rotate in a high-pressure chamber (H).)

1. An apparatus (1) for determining the position of an object (2) movable in a high-pressure chamber (H), the apparatus (1) comprising:

-a detection unit (1.1) having at least one sensor (1.1.1) for detecting the position of the object (2) and outputting a position signal, and a sensor wire (1.1.2) for forwarding the position signal to an evaluation unit (3), and

a carrier unit (1.2) for accommodating the detection unit (1.1),

-wherein the sensor (1.1.1) is arranged at an end (1.2.1) of the carrier unit (1.2) facing the object (2) and arranged in a stationary position in the high-pressure chamber (H),

-the carrier unit (1.2) has a flexible region (1.2.2) arranged between the fixed position end (1.2.1) and a region (III) passing through a housing (4) delimiting the high pressure chamber (H),

-the sensor line (1.1.2) of the detection unit (1.1) leads out of the high-pressure chamber (H) through the flexible region (1.2.2) and through a region (III) extending through the housing (4), and

-the flexible region (1.2.2) is formed by a section (1.2.5) of a guide tube (1.2.4) embodied as a spiral tube, through which the sensor line (1.1.2) is guided.

2. Device (1) according to claim 1, wherein the flexible area (1.2.2) forms a tension spring or a compression spring with respect to the length of the flexible area.

3. The device (1) according to claim 1 or 2, wherein the absolute position of the end (1.2.1) of the fixed position and the absolute position of the region (III) of the carrier unit (1.2) passing the housing (4) remain unchanged in case the length of the flexible region (1.2.2) changes.

4. The device (1) according to any one of the preceding claims, wherein the section (1.2.5) embodied as a spiral tube is arranged around and/or in a carrier tube (1.2.3), in particular around and/or in a rigid carrier tube (1.2.3).

5. Device (1) according to claim 4, wherein the section (1.2.5) embodied as a spiral tube is flexibly fixed on and/or in the carrier tube (1.2.3).

6. Device (1) according to one of the preceding claims, wherein the sensor (1.1.1) is fixed at one end (1.2.4.1) of the guide tube (1.2.4) and this end (1.2.4.1) is arranged within a carrier tube (1.2.3).

7. Device (1) according to one of the preceding claims, wherein the sensor (1.1.1) is welded, glued or screwed in particular by means of a cutting ring fitting (SV) to the guide tube (1.2.4).

8. Device (1) according to one of claims 4 to 7, wherein the carrier tube (1.2.3) is spring-loaded.

9. Device (1) according to one of the preceding claims, wherein the guide tube (1.2.4) is guided through the housing (4) and is connected with the housing (4) by means of a flange (5) in a form-fitting and force-fitting manner.

10. Device (1) according to claim 9, wherein the flange (5) is sealed with respect to the housing (4).

11. Use of a device (1) according to one of the preceding claims for determining the position of a rotatable, magnetically supported shaft in a high-pressure chamber (H).

Technical Field

The invention relates to a device for determining the position of an object that can be moved in a high-pressure chamber. The invention also relates to the use of the device.

Background

Such devices are known from the prior art. For example, sensors with flexible electrical leads are used for positioning gas-cooled motors. The flexible electrical conductor is composed, for example, of an arrangement of a plurality of thin metal wires of up to four, which are twisted with one another (also referred to as twisted wires). The litz wire is surrounded by an insulator to achieve electrical insulation. Air-filled cavities are usually formed between the wires of the litz wire and between the insulator and the litz wire. If such a flexible line is operated in a gas environment, in particular a high-pressure chamber, gas can enter the cavity as a result of the diffusion process until the gas pressure in the cavity equals the gas pressure of the external gas environment.

In the case of a pressure drop in the high-pressure chamber, the gas pressure drops only very slowly in the above-mentioned cavity, as long as the process continues on a diffusion basis. The differential pressure can damage the insulation of the flexible wire. To reduce the risk of such damage, the wires can be arranged, for example, in an elastic hose or a metal bellows, wherein the hose is filled with a fluid. It is also known to use immersion tubes, wherein the sensor is located at one end of the immersion tube and the leads of the sensor are arranged in a low-pressure region within the immersion tube.

US 4066949 a discloses a probe holder apparatus having a probe holder mounted in a support structure without a support pillar. The support structure generally comprises an elongated cylindrical housing. The elongate free end portions of the shelves extend substantially coaxially within the housing. The shelf has a pair of spaced circumferentially extending grooves configured near the free end of the shelf at the outer surface of the shelf. A resilient ring is arranged in each groove, wherein the outer surface of each ring is in contact with the inner surface of the housing section to form a resilient support structure for the shelves within the housing.

US 3859847 a discloses a vibration monitoring device with a shaft support for monitoring radial vibration movements of a rotating shaft. The shaft support is prestressed against the circumference of the shaft by means of a helical spring. An accelerometer for measuring vibrations is arranged near the shaft and at the shaft support. The acceleration signal is transmitted from the accelerometer to an electronics module at the upper or outer portion of the bearing cap in which the shaft support, the coil spring and the accelerometer are arranged.

Disclosure of Invention

The object underlying the invention is to propose an improved device for determining the position of an object that can be moved in a high-pressure chamber compared to the prior art. A further object of the invention is to propose an application for the device.

With regard to the device, this object is achieved according to the invention by the features in claim 1. With regard to this application, this object is achieved according to the invention by the features in claim 11.

Advantageous embodiments of the invention are the subject matter of the dependent claims.

The device according to the invention for determining the position of an object that can be moved in a high-pressure chamber comprises: the evaluation unit has at least one sensor for detecting the position of the object and outputting a position signal which is indicative of the position of the object, and a sensor line for relaying the position signal to the evaluation unit, the sensor line being arranged in particular in a low-pressure chamber located outside the high-pressure chamber. The device further comprises a carrier unit for accommodating the detection unit. The sensor is arranged at an end of the carrier unit facing the object and arranged in a stationary manner in the high-pressure chamber, wherein the carrier unit has a flexible region arranged between the stationary end and a region guided through a housing which delimits the high-pressure chamber, and wherein the sensor line of the detection unit is led out of the high-pressure chamber through the flexible region and through the region extending through the housing.

The device according to the invention uses the so-called immersion tube principle, in which a carrier unit configured as an immersion tube is divided into three regions.

The first region comprises a stationary end part with a sensor which is provided for detecting the position of the object, in particular the absolute position of the object in the high-pressure chamber, and which at the same time forms a pressure barrier between the high-pressure chamber and the inner chamber of the carrier unit. Thus, the inner chamber of the carrier unit forms a low pressure area. The sensor comprises, for example, a sensor head and a sensor carrier. Wherein the sensor carrier accommodates the sensor head. The sensor carrier is positioned as close as possible to the sensor head at the surface of the object and is arranged in a stationary manner in the high-pressure chamber. Thus, in the described device, the sensor head is positioned in a high-pressure chamber, wherein the sensor leads extend in a low-pressure region.

The second region includes a flexible region and is disposed between the first region and the third region. The sensor line is arranged in the flexible region, and the sensor line is led out of the housing via the third region. The flexible region enables mechanical flexibility of the sensor wire without changing the absolute position of the sensor in the high-pressure chamber and the position of the third region.

The third region is stationary like the first region, in particular with respect to the housing, and serves for sealing the carrier unit in the housing.

The device thus constructed enables an accurate measurement of the absolute position of the object in the high-pressure chamber. The thermal length change of the carrier element has no or at least only negligible minor effect on the position detection depending on the flexible region. Furthermore, the transmission of vibrations from the housing region to the sensor is reduced by means of the flexible region. In addition, the device enables a simple mounting/dismounting of the sensor by means of an opening in the housing, through which opening the third region of the carrier unit is guided. Additional openings for mounting/dismounting are not necessary.

In one embodiment, the flexible region forms a tension spring or a compression spring with respect to its length. The flexible region can thus be shortened or lengthened, wherein the absolute position of the positionally fixed end of the carrier unit accommodating the sensor in the high-pressure chamber and the position of the carrier unit in the housing remain unchanged. Thus, thermal influences, in particular thermal length changes of the carrier element, can be compensated for on the sensor.

The flexible region extends, for example, from the fixed end in a straight line in the direction of the housing, and the flexible region is made of a mechanically flexible material. In particular, the material bounding the side of the interior low-pressure region of the carrier unit is formed from a mechanically flexible material. The flexible zone can be enlarged or shortened under the influence of heat by means of the material. The material expands, for example, when heated and contracts accordingly when heat is dissipated. For this purpose, the carrier unit is designed, for example, as a metal bellows. The positionally fixed position of the sensor line running in the flexible region and the further region of the carrier unit is thus not influenced.

In a further embodiment, the flexible region is formed by a section of the guide tube, which is embodied as a spiral tube, through which the sensor line is guided, wherein the section embodied as a spiral tube can be arranged around and/or in the carrier tube, in particular around and/or in the rigid carrier tube. The section embodied as a spiral tube realizes the elastic structure in a compact configuration. The carrier tube serves to ensure a positionally fixed position of the sensor in the high-pressure chamber.

The section embodied as a spiral tube is particularly flexibly fixed on and/or in the carrier tube. The segments are fixed on and/or in the carrier tube, for example by means of clips or webs, so that vibrations transmitted on the carrier tube can be compensated. The guide tube comprising these sections can be arranged partially around the carrier tube or completely within the carrier tube, the respective end of the guide tube which is not designed as a spiral being arranged within the carrier tube, for example. The section embodied as a spiral tube is arranged around the carrier tube outside the carrier tube. The carrier tube comprises a corresponding opening or notch for guiding the guide tube. If the guide tube is arranged completely within the carrier tube, the diameter of the carrier tube in the region of the section embodied as a spiral tube can be greater than the diameter of the carrier tube in the other regions. In the region of the sensor, the diameter of the carrier tube tapers for space reasons. In addition, in this case, openings or notches can be dispensed with in the carrier tube.

In one embodiment, the sensor is fixed at one end of the guide tube, wherein this end is arranged within the carrier tube. This achieves a fixation of the sensor and ensures a fixed position.

The fastening of the sensor by means of the guide tube can be effected by means of welding, gluing or, in particular, by means of a screw connection of a cutting ring fitting. Alternatively, the sensor can also be located in a chamber, wherein the sensor head protrudes from the chamber, and wherein the sensor is not directly connected to the guide tube by welding.

One end of the guide tube is provided, for example, at a certain position in the chamber and is sealed, for example, by means of a high-pressure-resistant screw connection, for example a cutting ring fitting or a clamping ring screw. In this case, a pressure acts on the rear side of the sensor head arranged in the housing, which pressure is equal to the pressure prevailing in the guide tube, in particular the pressure of the ambient air.

In another embodiment, the carrier tube is spring-loaded. A simple mounting of the device is thus achieved, since a mechanical connection of the sensor to the sensor carrier is not necessary. The sensor is pressed against the sensor carrier by means of a spring-loaded carrier tube. In addition, the end of the carrier tube facing the sensor is acted upon by a spring force, wherein the spring force is generated by means of a spring, for example a torsion spring. The spring can be clamped by means of a spring clamping nut.

In one embodiment, the guide tube is guided through the housing and is connected to the housing by means of a flange in a form-fitting and/or force-fitting and/or material-fitting manner. The guide tube is not directly connected to the housing, but rather is fastened to a flange, which is connected to the housing, for example screwed. The guide tube is screwed, for example, to the flange. Alternatively, the guide tube can also be welded to the flange. The sensor can be mounted/dismounted in the closed housing by means of the fixing of the guide tube at the flange.

The flange is in particular sealed with respect to the housing. For this purpose, the sealing material is applied, for example, to the surface side of the flange and/or to the housing. Graphite is suitable as a sealing material, and graphite realizes high heat resistance, high medium resistance and high mounting safety.

The invention also relates to the use of a device according to the invention for determining the position of a magnetically mounted shaft that can rotate in a high-pressure chamber. The shaft is, for example, a component of a gas-cooled electric motor or generator. The shaft can also be a component of a machine in whose housing a flow of corrosive gas, liquid or particles is present.

Drawings

The above features, characteristics and advantages of the present invention and the implementation method and mode thereof will be understood in conjunction with the following description of the embodiments, which are further described in conjunction with the accompanying drawings. Shown here are:

fig. 1 shows a schematic cross-sectional view of an embodiment of an apparatus for determining the position of an object movable in a high-pressure chamber;

FIG. 2 shows a schematic cross-sectional view of an alternative embodiment of the device; and

fig. 3 shows a schematic cross-sectional view of an enlarged portion of a further alternative embodiment of the device.

In the drawings, parts corresponding to each other have the same reference numerals.

Detailed Description

Fig. 1 shows a sectional view of a device 1 for determining the position of an object 2 that can be moved in a high-pressure chamber H.

The device 1 is used in particular for determining the absolute position of an object 2 in a high-pressure gas environment. The object 2 is, for example, a rotatable, magnetically mounted shaft which is a component of a gas-cooled electric motor or generator. It is also possible that the object 2 is a component of a machine that releases a flow of corrosive gas, liquid or particles in the high-pressure chamber H. The determination of the position of the object 2 in the high-pressure chamber H is used for optimal operation of the motor/generator or the machine and further components and/or functions coupled to the machine.

The device 1 shown in fig. 1 comprises a detection unit 1.1 and a carrier unit 1.2. The detection unit 1.1 comprises a sensor 1.1.1 for detecting a position signal of the object 2 in the high-pressure chamber H. The sensor 1.1.1 can be designed as an inductive sensor, a capacitive sensor, an optical sensor, an ultrasonic sensor, an electromagnetic sensor, and similar further sensors. The sensor 1.1.1 is in particular an eddy current sensor. In this case, a contactless dynamic detection of the absolute position of the object 2 in the high-pressure chamber H can be achieved by means of the sensor 1.1.1.

The detection unit 1.1 further comprises a sensor wire 1.1.2 for forwarding the position signal to the evaluation unit 3. The evaluation unit 3 is, for example, a control device and is located in the low-pressure chamber N according to the above-described embodiment and is therefore arranged outside the high-pressure chamber H.

The sensor line 1.1.2 comprises an arrangement of a plurality of up to four thin metal wires, for example, described in a manner not shown in detail, which are connected to one another, in particular twisted to form a so-called stranded wire. If the sensor line 1.1.2 is a coaxial line, the line comprises at least one further conductor, which is arranged coaxially around the insulated strand. The additional conductor is likewise embodied as a litz wire of a multi-wire. This achieves mechanical flexibility of the sensor wire 1.1.2.

Cavities are usually formed between the wires of the litz wire and between the insulator and the litz wire, which cavities are filled with air. If the sensor line 1.1.2 is operated in a gas environment, in particular in the high-pressure chamber H, gas can enter the cavity as a result of the diffusion process until the gas pressure in the cavity is equal to the gas pressure in the external gas environment, i.e. in the high-pressure chamber H.

In the case of a pressure drop in the high-pressure chamber H, the gas pressure drops only very slowly in the cavity, as long as the process continues on the basis of diffusion. The differential pressure can damage the insulation of the sensor line 1.1.2. To reduce the risk of such damage, the sensor wires 1.1.2 in the carrier unit 1.2 are led out of the housing 4.

The carrier unit 1.2 is configured as an immersion tube and comprises three regions I, II, III.

The sensor 1.1.1 is arranged in the first region I of the carrier unit 1.2, which sensor is provided between the high-pressure chamber H and the inner chamber IR of the carrier unit 1.2 in addition to the detection of the position of the pressure barrier formed. The inner space IR of the carrier unit 1.2 forms a low-pressure region in relation to the high-pressure chamber H.

The sensor 1.1.1 is arranged, in particular fixed, at a free end 1.2.1 of the carrier unit 1.2 and projects from this free end in the direction of the object 2. The sensor 1.1.1 is arranged in particular at a distance a from the object 2 in order to detect the position signal in a contactless manner.

The free end 1.2.1 of the carrier unit 1.2, which receives the sensor 1.1.1, is also stationary in the high-pressure chamber H. The sensor 1.1.1 is fixedly received, in particular pressed or screwed, in a sensor carrier 1.1.1.2 which is further shown and described in fig. 2. The absolute position of the sensor 1.1.1 is therefore fixed in the high-pressure chamber H. The sensor line 1.1.2 extends in a low-voltage region of the carrier element 1.2. Thus, the gas diffusion process can be avoided or at least significantly reduced as described before.

The carrier unit 1.2 is mechanically flexible with respect to the first region I and the third region III in the second region II. In other words, the carrier unit 1.2 comprises a flexible region 1.2.2, which is arranged between the sensor 1.1.1 and a housing 4, for example a motor housing, delimiting the high-pressure chamber H. A sensor line 1.1.2 is also arranged in the flexible region 1.2.2, which leads out of the high-voltage chamber H via the third region III.

In order to flexibly form the carrier unit 1.2 in the second region II, the carrier unit comprises a mechanically flexible material, which compensates for thermal length variations of the device 1. For this purpose, the carrier unit 1.2 is designed, for example, as a metallic bellows. The flexible region 1.2.2 therefore appears to correspond to a tension spring or a compression spring without changing the absolute position of the sensor 1.1.1 in the high-pressure chamber H. The position of the sensor 1.1.1 and the position of the carrier unit 1.2 do not change or change only slightly, in particular in the case of a change in the length of the flexible region 1.2.2 in the third region III. The carrier unit 1.2 has a material that is as rigid as possible, for example metal or plastic, in the first region I and the third region III.

The carrier unit 1.2 is guided out of the housing 4 in the third region III. For this purpose, the housing 4 comprises a recess 4.1 with a sealing region 4.2, which seals the carrier unit 1.2 in the housing 4. For sealing, graphite is used, for example, which offers high heat resistance, high dielectric resistance and high installation safety. Furthermore, this enables a simple mounting/dismounting of the sensor 1.1.1 by means of the recess 4.1. An additional opening for mounting/dismounting of the sensor 1.1.1 is not necessary.

The carrier unit 1.2 is stationary in the third region III, in particular with respect to the housing 4. Thus, in the case of a change in the length of the carrier unit 1.2 in the flexible region 1.2.2, the position of the carrier unit 1.2 in the third region III does not change or changes only slightly.

The flexible region 1.2.2 thus enables compensation of the change in length of the carrier element 1.2, which compensation results in particular from the thermodynamic influence in the high-pressure chamber H. The position of the sensor 1.1.1 is thus not changed or only slightly changed in the high-pressure chamber H. This enables an accurate measurement of the absolute position of the object 2 in the high-pressure chamber H. Furthermore, the sensor line 1.1.2 extends in a low-pressure region inside the carrier unit 1.2, so that pressure changes in the high-pressure chamber H have no or at least only a slight effect on the pressure inside the sensor line 1.1.2. Thus, the risk of damaging the sensor wires 1.1.2 is reduced.

Furthermore, the transmission of vibrations from the region of the housing 4 to the sensor 1.1.1 can be reduced by means of the flexible region 1.2.2.

Fig. 2 shows a cross-sectional view of an alternative embodiment of the device 1.

Similar to the exemplary embodiment shown in fig. 1, the device 1 comprises a detection unit 1.1 and a carrier unit 1.2, which is introduced into the high-pressure chamber H through a recess 4.1 of the housing 4. Here, however, the carrier unit 1.2 is embodied in two parts and comprises a substantially rigid carrier tube 1.2.3 and a guide tube 1.2.4. The carrier tube 1.2.3 is constructed in the form of a tube stamp. The carrier tube 1.2.3 and the guide tube 1.2.4 are each hollow and are made of metal, for example. The guide tube 1.2.4 accommodates the sensor line 1.1.2 and is divided into three regions I to III according to the carrier unit 1.2 depicted in fig. 1.

Similar to the exemplary embodiment in fig. 1, the sensor 1.1.1 is arranged in the first region I. The sensor 1.1.1 is in particular fixed at the end 1.2.4.1 of the guide tube 1.2.4. Here, the sensor 1.1.1 is further described and comprises a sensor head 1.1.1.1 and a sensor carrier 1.1.1.2, which accommodates the sensor head 1.1.1.1. In an alternative embodiment, not shown, the sensor 1.1.1 can also be located inside a chamber, wherein the sensor head 1.1.1.1 protrudes from the chamber. Here, the end 1.2.4.1 of the guide tube 1.2.4 is introduced into the chamber, for example, at a certain point and is sealed, for example, by means of a high-pressure-resistant screw connection, for example, a cutting ring fitting or a clamping ring screw. Here, a pressure acts on the sensor head back, which pressure is equivalent to the pressure prevailing inside the guide tube 1.2.4, in particular the pressure of the ambient air.

The sensor head 1.1.1.1 includes, for example, one or more eddy-current sensors for detecting a position signal of the object 2. For this purpose, the sensor head 1.1.1.1 is positioned at a distance a from the surface of the object 2 and is arranged in a stationary manner in the high-pressure chamber H. Since the position signal depends on the distance a, the absolute position of the object 2 can be realized contactlessly by means of the sensor 1.1.1. The sensor head 1.1.1.1 protrudes from the sensor housing 1.1.1.4 in the direction of the object 2, wherein, in the exemplary embodiment shown, the sensor head 1.1.1.1 protrudes from the edge of the sensor carrier 1.1.1.2 in the direction of the object 2 into a region 1.1.1.3 of the sensor carrier 1.1.1.2, which here represents a cut-out loop.

The sensor housing 1.1.1.4 is cylindrical in the illustrated embodiment and has a rim 1.1.1.1.1 in the horizontal region in the direction of the sensor head 1.1.1.1, the diameter of the rim being greater than the diameter of the sensor housing 1.1.1.4 and of the sensor head 1.1.1.1. Alternatively, the rim 1.1.1.1.1 may be sized no larger than the diameter of the sensor housing 1.1.1.4. The sensor housing 1.1.1.4 comprises contact elements for electrically contacting the sensor head 1.1.1.1 with the sensor line 1.1.2 in a manner not shown in detail, and thus for forwarding the position signal to the evaluation unit 3.

The sensor carrier 1.1.1.2 forms a mechanical carrier for the sensor housing 1.1.1.4 and positions the sensor head 1.1.1.1 in a stable manner and is stationary in the high-pressure chamber H. The sensor carrier 1.1.1.2 has a gap corresponding to the rim 1.1.1.1.1, wherein the rim 1.1.1.1.1 rests loosely on the sensor carrier 1.1.1.2, and wherein the sensor head 1.1.1.1 protrudes through the sensor carrier 1.1.1.2 in the direction of the object 2, and wherein the sensor head 1.1.1.1 is pressed on the sensor carrier 1.1.1.2 by means of the carrier tube 1.2.3. This is further described later.

Alternatively, the sensor 1.1.1 is screwed to the sensor carrier 1.1.1.2. For this purpose, the sensor 1.1.1 has an external thread and the sensor carrier 1.1.1.2 has an internal thread, the external thread and the internal thread engaging each other in a form-fitting and force-fitting manner. In this case, the sensor 1.1.1 is screwed to the sensor carrier 1.1.1.2 by means of a socket wrench for mounting the sensor 1.1.1. In a variant, the arrangement of the carrier tube 1.2.3, the spring element 1.3 and the tensioning element 1.4 is not necessary.

In addition, the sensor 1.1.1 is fixed at the back at the guide tube 1.2.4. The sensor housing 1.1.1.4 is welded to the guide tube 1.2.4, in particular on the rear side. Alternatively, the sensor head 1.1.1.1 can also be adhesively bonded or screwed to the guide tube 1.2.4 (see fig. 3). In addition, the guide tube 1.2.4 can also be fixed in or on the sensor carrier 1.1.1.2, for example by means of a sealed screw connection.

The end 1.2.1 of the carrier unit 1.2 accommodating the sensor 1.1.1 (here the guide tube 1.2.4) is arranged inside the carrier tube 1.2.3 and is introduced into the carrier tube 1.2.3 from the outside through an opening 1.2.3.1 introduced into the carrier tube 1.2.3.

In addition to the carrier tube 1.2.3, the section 1.2.5 of the guide tube 1.2.4, which is embodied as a spiral tube, extends according to the exemplary embodiment shown. This section 1.2.5 forms a flexible region 1.2.2 of the carrier unit 1.2.

The section 1.2.5 embodied as a spiral tube realizes an elastic structure and is located in the second region II of the carrier unit 1.2. The rigid carrier tube 1.2.3 serves to ensure a positionally fixed position of the sensor 1.1.1 and a mechanical stability of the guide tube 1.2.4 in the high-pressure chamber H.

The section 1.2.5 is arranged helically around the carrier tube 1.2.3 and is fixed there. The section 1.2.5 is fixed to the carrier tube 1.2.3, for example by means of clamps or clips (not further shown), so that vibrations transmitted to the carrier tube 1.2.3 can be compensated for. Alternatively, the section 1.2.5 can also be arranged completely in the inner space IR of the carrier tube 1.2.3, wherein in this case the diameter of the carrier tube 1.2.3 in the region of the section 1.2.5 is optionally larger than the diameter of the carrier tube 1.2.3 in the further region. If the guide tube 1.2.4 is arranged completely in the interior IR of the carrier tube 1.2.3, the opening or recess for threading the guide tube 1.2.4 can be dispensed with.

In the third region III, the guide tube 1.2.4 is also arranged inside the carrier tube 1.2.3 and is guided through an opening 1.2.3.1 which is introduced in the carrier tube 1.2.3 in a manner similar to the first region I. The guide tube 1.2.4 is guided through an opening 4.1 of the housing 4 into the low-pressure chamber N.

In addition, a spring element 1.3 is arranged in the third region III, which spring element exerts a spring force on the end of the carrier tube 1.2.3 arranged in the cutout 4.1. In other words, the carrier tube 1.2.3 is spring-loaded. A simple mounting/dismounting of the sensor 1.1.1 is thus possible, since the mechanical connection of the sensor head 1.1.1.1 to the sensor carrier 1.1.1.2 is produced by means of the spring force. The sensor head 1.1.1.1 is pressed onto the sensor carrier 1.1.1.2, in particular by means of a spring-loaded carrier tube 1.2.3. Thus, the sensor head 1.1.1.1 and the sensor carrier 1.1.1.2 are loosely connected to each other.

The spring element 1.3 is, for example, a torsion spring, which can be clamped by means of a tensioning element 1.4, for example, a spring clamping nut. In the exemplary embodiment shown, the tensioning element 1.4 is arranged in a recess 4.1, wherein the recess 4.1 is larger than the tensioning element of the exemplary embodiment shown in fig. 1. The tensioning element 1.4 has, for example, an external thread, not shown, which is introduced in a form-fitting and force-fitting manner into an internal thread inserted in the recess 4.1. The tensioning element 1.4 is moved axially in the direction of the carrier tube 1.2.3 with the tensioning element 1.4 screwed into the recess 4.1, and the spring element 1.3 is thus tensioned.

In the third region III, the guide tube 1.2.4 is guided through the housing 4 and is connected to the housing 4 by means of a flange 5 in a form-fitting and/or force-fitting and/or material-fitting manner. The guide tube 1.2.4 is fixed to the flange 5, in particular by means of a sealed threaded pipe joint RV. The threaded pipe joint RV can be a cutting ring fitting or a clamp ring screw and/or a seal, for example, including a graphite liner.

According to the exemplary embodiment shown, the flange 5 is screwed to the housing 4 via fastening elements 5.1, in particular screws, and has a central gap for guiding the guide tube 1.2.4. The guide tube 1.2.4 is fixed in the region of the gap to the flange 5 by means of a threaded tube connection RV shown. Alternatively, the guide tube 1.2.4 can also be welded to the flange 5. The fastening of the guide tube 1.2.4 at the flange 5 enables the mounting/dismounting of the sensor 1.1.1 in the closed housing 4.

The flange 5 is sealed with respect to the housing 4. For this purpose, a sealing element 6 is arranged or provided between the flange 5 and the housing 4. The sealing element 6 is formed, analogously to the sealing region 4.2, for example from graphite. The sealing element 6 can be mounted, in particular glued, glued or sprayed on the surface side of the flange 5 facing the housing 4 and/or on the surface side of the housing 4 facing the flange 5. With the fixing flange 5 fixed at the housing 4, the sealing element 6 is compressed so that the area between the housing 4 and the flange 5 is sealed. Alternatively, the sealing element 6 is also arranged in the region between the flange 5 and the housing 4 after the flange 5 is fixed at the housing 4.

The device 1 described here, like the device 1 of fig. 1, makes it possible to compensate for changes in the length of the carrier element 1.2, which is obtained in particular from the thermodynamic effects in the high-pressure chamber H. The section 1.2.5 embodied as a spiral tube here forms in particular a flexible region 1.2.2, which can be lengthened or shortened on the basis of the spiral shape according to the principle of a tension spring or a compression spring. The position of the sensor 1.1.1 in the high-pressure chamber H is thus not changed or only slightly changed. The position of the guide tube 1.2.4 in the third region III likewise does not change or changes only slightly.

Fig. 3 shows a cross-sectional view of an enlarged portion of the device 1 in a further alternative embodiment.

The illustrated section further shows a first region I of the carrier unit 1.2, which is similar to the carrier unit 1.2 described in fig. 2 and has a guide tube 1.2.4 with a section 1.2.5 embodied as a spiral tube for forming the flexible region 1.2.2. The carrier tube 1.2.3 is not shown here.

In contrast to the carrier unit 1.2 depicted in fig. 2, the sensor housing 1.1.1.4 is not welded to the guide tube 1.2.4, but is connected to the guide tube 1.2.4 by means of a cutting ring fitting SV. The sensor housing 1.1.1.4 shown here is of one-piece design. Alternatively, the sensor housing 1.1.1.4 can also consist of a plurality of parts welded to one another.

The sensor housing 1.1.1.4 has a tool engagement face 1.1.1.4.1, here of the external hexagonal type. In addition, a cutting ring 7 is arranged on the rear side at the sensor housing 1.1.1.4, which closes the end of the guide tube 1.2.4 and engages at the end face at the rear end of the sensor housing 1.1.1.4. The cutting ring 7 is made of a metal or a metal alloy, in particular.

In addition, the cutting ring 7 and the rear end of the sensor housing 1.1.1.4 are surrounded by a union nut 8 as an actuator. The union nut 8 has an internal thread, with which it can be screwed onto the sensor housing 1.1.1.4 and/or the guide tube 1.2.4. For this purpose, the sensor housing 1.1.1.4 and/or the guide tube 1.2.4 have corresponding external threads.

During the assembly of the device 1, the union nut 8 is rotated, in particular screwed, by means of a tool on the sensor housing 1.1.1.4 and/or the guide tube 1.2.4. In this case, the cutting ring 7 is clamped in the axial direction, as a result of which the cutting ring is deformed radially inward, and the incision edge arranged at the cutting ring 7 is inserted into the material of the guide tube 1.2.4, in particular with a positive fit, under the effect of the incision stress concentration. As shown in the exemplary embodiment, the cutting ring 7 has an outer conical surface 7.1 which tapers conically on the end side and engages on a corresponding inner conical surface 8.1 of the union nut 8. Thereby, the radial compression of the cutting ring also achieves a wedge effect.

On the one hand, the guide tube 1.2.4 is mechanically fixed by means of the described cutting ring fitting SV. On the other hand, a metal sealing function can be achieved via the cutting ring 7. In addition, a universal or structurally identical sensor 1.1.1 can be used, wherein the guide tube 1.2.4 is produced depending on the application.

Although the invention is further illustrated and described in detail by means of preferred embodiments, the invention is not limited to the disclosed examples and further variants can be derived therefrom by those skilled in the art without departing from the scope of protection of the invention.