DE102018101179B3 - Method and device for monitoring a temperature at at least one bearing - Google Patents

Abstract

To prevent damage, improved bearing control is proposed. The invention relates to bearings (17) in which a flowable lubricant can escape. It is proposed to detect a temperature immediately outside the bearing (17) at the exit point (41, 42) in a flow path (43, 44) (compare FIG. 3).

Description

The invention relates to a method for monitoring a temperature at a bearing, wherein flowable lubricant exits the bearing at an exit point and flows along a bearing part holding the frame in a flow path.

The frame part may in this case be housing-forming or surrounded by a housing.

The invention further relates to a method for monitoring the temperature of an arrangement of at least two such bearings.

The invention further relates to a device for monitoring a temperature at a bearing, with a bearing part holding the frame part, wherein the bearing has an outlet for lubricant and to the frame part, a flow path is established for exiting at the outlet lubricant.

It is known to detect an overload of a bearing based on a temperature monitoring of the bearing. Such a detection is carried out, for example, in internal combustion engines, in which the risk exists that in case of malfunction of the lubricant circuit overheating can be generated at the camp.

In order to monitor the temperature of a bearing, it is known to detect a temperature from outside when in contact with a bearing surface. However, this has the disadvantage that due to the heat capacity of the material forming the bearing and the sensor some delay in the temperature detection occurs. This delay causes bearing damage to occur before overheating can be detected.

Therefore, it has been proposed to measure the temperature of a bearing lubricating oil. Known is the so-called splash oil temperature monitoring. In this method, it is made use of that is thrown at fast-moving, in particular rotating, stored parts oil. This thrown-off oil is then collected, for example, by an oil collector. Then the temperature of the collected oil is measured.

However, even with this method, the problem of a certain time delay of the temperature detection, so there is a risk that bearing damage will not be detected in time and thus not be prevented. In addition, it can be problematic with this method that oil streams can mix with each other before the temperature measurement, whereby the temperature measurement could be falsified.

From the publication DE 10 2006 015 319 B3 a measuring unit for measuring the temperature of a piston rod is known, wherein the measuring unit comprises a measuring ring, which is arranged in a housing which is formed from a support ring and a closure flange and having an axially extending bore for receiving the piston rod. It is further provided that the first temperature measuring element is inserted into an opening of the support ring and extends with its tip into the wellbore deepest.

From the DE 101 41 930 A1 a device is known inter alia for detecting the temperature of a transmission oil of a motor vehicle, wherein the device has a first sensor element for measuring the rotational speed of a rotating element and a second sensor element for measuring the temperature and wherein it is provided that the first and the second sensor element in a common sensor housing are arranged.

The utility model DE 298 20 623 U1 discloses a measuring device for monitoring a temperature that prevails in the region of a bearing of a crankshaft or a connecting rod of an engine. For this purpose, a bow-shaped electrical connection line made of copper is provided on the outer side of the connecting rod, one end of which is connected in an electrically conductive manner closer to the bearing to be monitored than its other end to the connecting rod or to the connecting rod. Since the connecting rod is also made of electrically conductive material, for. B. is formed of cast iron, this results in a self-contained electrical circuit.

From the DE 601 15 540 T2 For example, a temperature control arrangement for a crankshaft of a reciprocating engine is known in which a temperature detecting means is disposed at a distance of 1 to 20 mm from the surface of the crankpin. The temperature detection means can be accommodated in the immediate vicinity of the surface of the crank pin.

Against this background, the object of the invention is to detect overloading of a bearing as early as possible, reliably and unambiguously assignable.

To achieve the object, the features of claim 1 are provided according to the invention. It is thus proposed according to the invention in a method of the initially described type for solving the above problem, that the temperature is detected immediately outside the camp at the exit point in the flow path.

The invention has recognized that a high heat transfer coefficient of the lubricant, for example lubricating oil, can be used to monitor a storage temperature by selecting the location for the temperature of the lubricant as close as possible to the bearing. It can thus be achieved that a temperature increase in the temperature in the lubricant correlates as accurately as possible with a temperature rise of the storage temperature. The invention thus enables a monitoring of a storage temperature by monitoring a temperature of a lubricant in the manner described.

This approach is advantageous because the temperature actually measured with a high degree of accuracy of the current temperature, which is of particular interest for the desired monitoring. Of interest is primarily the current temperature of the mechanically stressed parts of the camp. Since the lubricant is in direct contact with these parts, the determination of the temperature of the lubricant provides a very good estimate of the bearing temperature. Since the measurement takes place in a flow path that can be specifically assigned to the bearing, it is also ensured that the temperature of the bearing of interest is actually measured and not the temperature of another system component. Due to the spatial proximity of the temperature measurement to the exit point of the flowing lubricant, it is ensured that the actually measured value is also determined without a time delay. This also allows the use of temperature sensors with a very short response time. With the proposed solution overloads of a bearing can thus be detected early, reliable and clearly attributable.

The invention has the further advantage that design changes that can lead to material weaknesses are dispensable in a functional area of the bearing. According to the state of the art, for example, blind holes are made in the bearing in order to arrange a temperature sensor. This is complex and weakens the material. Preferably, therefore, the exit location in an axial edge region or axially outside of a stored portion of a movable part, such as a crankshaft, formed.

The invention enables an accuracy with which minute changes in the condition of a crankcase condition can be detected quickly and automatically. Thus, an active monitoring system can be created, which initiates corresponding attenuation steps within very short time periods in order to prevent bearing damage occurring or to limit it as much as possible.

The proposed solution is versatile. Thus, the bearing can be any bearing type in which a flowable lubricant can be used, for example, it may be a plain bearing, roller bearings or needle roller bearings. The bearing may for example be part of a combustion engine forming a functional unit. In an engine, the bearing of the rapidly rotating crankshaft is exposed to high loads, so that a reliable monitoring of the bearing temperature has a high importance. However, the scope of the invention extends not only to piston engines, but may relate to functional units of various kinds, which can lead to bearing stresses and thus to a need for monitoring a storage temperature.

In order to achieve effective monitoring, it can be provided in an advantageous embodiment of the method according to the invention that an alarm signal is generated when a temperature rise exceeds a threshold value. It can be provided that the threshold value is defined by an absolute temperature value. Alternatively or additionally, it may be provided that the threshold value is defined by a relative temperature difference. The temperature difference may in this case be based, for example, on a unit of time. It can also be provided that there is a staggering of threshold values. For example, when a first threshold value is exceeded, a pre-alarm can be triggered and a shutdown of a functional unit comprising the bearing can be effected when a second threshold value is exceeded. The functional unit may be, for example, as described above, for example an internal combustion engine. The threshold value or the staggered threshold values are preferably dependent on an operating state of the functional unit. The operating state can be defined for example by an operating temperature, a duty cycle, an ambient temperature of the functional unit and / or a force load of the functional unit.

In order to be able to detect an abnormal temperature increase more accurately, it can be provided in a further advantageous embodiment of the method according to the invention that at least two locations each an exit point is formed on the bearing, wherein lubricant exits from the camp at each exit point and each at a warehouse holding frame part flows along in a flow path and that in each case a temperature is detected immediately outside the camp at each exit location in the respective flow path. Preferably, the exit locations are each formed on opposite sides of the bearing. Relative to a longitudinal axis of the bearing, which for example by the Axle a shaft held by the bearing may be formed, it may be particularly advantageous if the exit locations are each formed on axially opposite side of the bearing.

In order to achieve the stated object, the features of the subordinate claim directed to a method for temperature monitoring of an arrangement of at least two bearings are provided according to the invention. It is thus proposed according to the invention in such a method for achieving the stated object that at least one temperature is detected and monitored at each of the at least two bearings. This is done by means of a method according to the invention for monitoring a temperature at a bearing, in particular as described above and / or according to one of the claims directed to a method for monitoring a temperature at a bearing. According to the invention, an average temperature is formed from the temperatures thus detected. This is done, for example, by averaging. Furthermore, according to the invention, it is provided that for each of the temperatures thus detected a relative temperature difference is determined as a deviation from the respectively detected temperature and the average temperature. The relative temperature difference determined in this way can also be the relative temperature difference already mentioned above, which defines a threshold value above which an alarm signal is generated.

The inclusion of multiple bearings to determine an individual deviation from an average temperature causes a faulty load can be detected very reliable. In this way, namely, it can be determined whether a specific bearing deviates from the temperature behavior of the other bearings, which would indicate a faulty load. If there is no comparison with the temperature behavior of the other bearings, the detection of faulty loads can be more difficult since an increase in temperature at a single bearing can also be functional and does not necessarily have to be based on an incorrect load.

The detection of temperatures in a flow path of the lubricant according to the invention proves to be particularly advantageous with the inclusion of several bearings over known methods in which thrown off oil is first collected before a temperature measurement takes place. This ensures that oil quantities can not mix so that the result can not be distorted.

The at least two bearings are preferably functionally similar bearings. This has the advantage that only functionally similar bearings are taken into account when forming the average temperature. This can be important if the operating temperatures of dissimilar bearings are not equal. For example, it may be provided that in each case an average temperature for the main bearings, the connecting rod bearings and the cylinders of an internal combustion engine are formed independently of each other.

If the bearings belong to an internal combustion engine, it may be provided, for example, in a staggering of threshold values already described above, that a normal operating state is preset for a temperature deviation of the average temperature of less than ΔT ₁ , with a deviation equal to ΔT ₁ or between ΔT ₁ and ΔT ₂ (ΔT ₁ <ΔT ₂ ), a pre-alarm is generated and at a relative temperature difference equal to ΔT ₂ or above ΔT ₂ , the engine is shut down. ΔT ₁ and ΔT ₂ can be determined depending on the bearing used. However, the concrete values will usually be engine dependent. ΔT ₁ and ΔT ₂ can hereby be dependent on the operating state of an internal combustion engine, in particular its temperature, rotational speed of the crankshaft or other operating variables. Insofar as the threshold values are to be dependent on an operating state, in the case of an internal combustion engine it may be expedient if greater temperature deviations from the average temperature are required for triggering an alarm signal with a warm engine than with a cold engine. Conversely, it can also be favorable if ΔT ₁ and ΔT _{2 are} smaller in a warm combustion engine than in a cold combustion engine. ΔT ₁ and ΔT ₂ may also have a different temperature behavior.

To calculate the average temperature, means may be provided with which it can be calculated. This can for example be done directly by way of suitable electronic circuitry or by means of a microprocessor. The invention can therefore also relate to a device for monitoring the temperature of a bearing arrangement, wherein means are designed or set up with which the above-described method according to the invention for monitoring the temperature of an arrangement of at least two bearings can be executed or executed.

To achieve the above object, the features of the invention directed to a device for monitoring a temperature on a bearing ancillary claim are provided. It is thus proposed to solve the above object according to the invention in such a device of the type described above, that immediately outside the camp on Exit location in the flow path, a temperature sensor is arranged.

With this temperature sensor, a temperature in the manner described above can be detected. Due to this solution, overloads of a bearing can therefore be detected early, reliably and unambiguously assigned.

Preferably, a temperature sensor with a fast response is used. Depending on the application, it may be sufficient if the temperature sensor detects a temperature change of 1 ° C within 30 seconds. However, the invention also allows the use of significantly faster sensors, since the sensors can be made very small. Thus, temperature sensors with response times of less than one second or significantly less than one second per degree Celsius are realistic and expedient, with measurement accuracies of less than 0.5 ° C or even less than 0.01 ° C can be achieved.

In order to increase the measuring accuracy, it can be provided in an advantageous embodiment of the device according to the invention that the flow path is defined by a groove formed in a surface of the frame part. The groove is preferably exposed. On the one hand, a groove is very well suited for specifying a clearly defined flow path. On the other hand, the groove has the advantage that it forms a suitable measuring volume for measuring a temperature. Such a groove can be formed, for example, directly in a casting process with the frame part. Additional processing steps, such as drilling, are dispensable. The groove can also be formed by other methods, such as milling.

In order to carry out the temperature measurement as close as possible to the operating range of the lubricant and thus to further increase the measuring accuracy, it can be provided in a further advantageous embodiment of the device according to the invention that the groove extends from a contact surface of the bearing. The contact surface of the bearing is formed by a surface region of the bearing, which is in contact with a portion of a mounted part via a lubricant film.

To enable the most accurate temperature measurement, it can be provided in a further advantageous embodiment of the device according to the invention, that the temperature sensor has a sensor which is inserted at least in a measuring section in a recess in the flow path on the frame part. Preferably, the sensor is inserted in the measuring section in the groove.

In a further advantageous embodiment of the device according to the invention can be provided that the measuring section has a length which is at least a 10-fold groove width. This supports the flow path and improves measurement accuracy.

In order to improve the electrical contact, it can be provided in a further advantageous embodiment of the device according to the invention that the sensor is designed angled.

In a further advantageous embodiment of the device according to the invention can be provided that the probe is designed stretched out, so that its electrical contact is disposed outside of a range which is swept by a part held by the bearing during its movement. In this way, a secure electrical contact can be provided.

In a further advantageous embodiment of the device according to the invention can be provided that the sensor is arranged in a closed after at least two, preferably at least three sides measuring space. As a result, the flow properties of the lubricant and measuring environment for temperature detection are improved.

In order to provide a reliable temperature detection, it can be provided in a further advantageous embodiment of the device according to the invention that the temperature sensor has a temperature-dependent resistance.

In a further advantageous embodiment of the device according to the invention can be provided that a signal of the temperature sensor is transmitted wirelessly. This can be advantageous, as this can avoid problems with electrical contacting of the temperature sensor. For example, this allows the monitoring of a moving bearing in a simple manner. In addition, there is more freedom in choosing a technically suitable location for the arrangement of the temperature sensor. For example, there is no difficulty in having the temperature sensor mounted on moving parts such as a connecting rod. However, it must be noted that in individual cases a wireless transmission would have to take place between material lying between the temperature sensor and the signal receiver.

In a further advantageous embodiment of the device according to the invention it can be provided that a measuring section of the measuring sensor, for example the aforementioned measuring section, is arranged in a radial area swept by a rotating part, wherein the rotating part is mounted in the bearing. In the radial region, a flow path can develop particularly well, so that the measurement accuracy can be improved thereby.

In order to be able to detect an abnormal temperature increase more accurately, it can be provided in a further advantageous embodiment of the device according to the invention that on the frame part a further outlet for lubricant is provided, that on the frame part, a further flow path for emerging at the further outlet location lubricant is set up and that a further temperature sensor is arranged immediately outside the bearing at the further exit location in the further flow path. Preferably, the further exit location is opposite or axially opposite a side of the frame part forming the flow path.

In a further advantageous embodiment of the device according to the invention it is provided that the frame part comprises a bearing shell. Alternatively it can be provided that the frame part is a connecting rod. Furthermore, it can alternatively be provided that the frame part forms a hollow cylinder. The invention is particularly advantageous in the aforementioned embodiments.

The invention will now be described in detail with reference to a few embodiments, but is not limited to these few embodiments. Further exemplary embodiments result from a combination of the features of individual or several protection claims with one another and / or with one or more features of the exemplary embodiments.

• 1 einen Kurbeltrieb eines Verbrennungsmotors, wobei zu jedem Lager eine erfindungsgemäße Vorrichtung zur Überwachung einer Temperatur des betreffenden Lagers ausgebildet ist,
• 2 bis 3 Ausschnitte des Kurbeltriebs gemäß 1,
• 4 eine Seitenansicht eines alternativen Rahmenteils mit Messfühler zur Erläuterung der Erfindung.

It shows

• 1 a crank mechanism of an internal combustion engine, wherein for each bearing a device according to the invention for monitoring a temperature of the respective bearing is formed,
• 2 to 3 Cutouts of the crank mechanism according to 1 .
• 4 a side view of an alternative frame part with probe to explain the invention.

In the following description of the invention in their function matching elements get even with possibly different design or shape matching reference numerals.

1 to 3 show a crank mechanism 2 a non-illustrated internal combustion engine. In 1 are repeating components for clarity only once provided with a reference numeral. The crank mechanism 2 includes the cranked crankshaft 3 with shaft journal 5 , Crankpin 7 and crank cheeks 9 , Next, the crank mechanism 2 connecting rods 11 and pistons 13 on. At the crankshaft 3 is a flywheel 15 attached.

For storage of the crankshaft 3 is in the area of the shaft journal 5 each designed as a plain bearing 17 arranged. Camps 17 each have an upper bearing shell 19 and a lower bearing shell 21 on.

The lower bearing shell 21 is part of a frame part 22 which the camp 17 holds. The warehouse 17 is also from the bearing cap 25 held, which with the frame part 22 is immovably connected. While in the in 1 to 3 illustrated embodiment, the lower bearing shell 21 integral with the frame part 22 is in contrast to this in the in 4 shown embodiment, the lower bearing shell 21 from the rest of the frame part 22 severable. Incidentally, there are no significant differences between the two embodiments. In particular, the in 3 shown frame part 22 including sensor 48 through the in 4 be replaced component shown. Unless otherwise indicated, the following will apply in the following 3 shown frame part 22 Referenced.

The upper bearing shells 19 are over side plates 23 integrally connected together and form together with the side panels 21 an integrally formed bearing cap 25 ,

Camps 17 each have a designed as a sliding surface cylindrical contact surface, each having a portion of the crankshaft 3 include. The crankshaft 3 is in the camps 17 rotatably mounted. The cylindrical contact surface of the bearings 17 are from the half-cylinder forming lower contact surface 29 the lower bearing shell 21 and the correspondingly shaped upper contact surface of the upper bearing shell 19 composed. In an alternative embodiment, the two bearing shells 19 . 21 connected to a one-piece hollow cylinder.

To ensure a frictionless rotation of the crankshaft 3 in the camps 17 to allow, located in the upper bearing shells 19 one channel each 27 for the supply of lubricant. As a lubricant is shown in the Embodiment uses engine oil. As is between the crankshaft 3 and the contact surface of the bearings 17 a game is, the lubricant creeps into the gap 31 between contact surfaces and crankshaft and lubricates in this way the bearings 17 , As a result of the existing game occurs axially from the gap 31 Lubricant and flows on the two axial sides 33 . 35 of the frame part 22 on a surface 37 of the frame part 22 down.

In the surface 37 of the frame part 22 is an exposed groove 39 educated. The groove 39 forms a recess of the frame part 22 , The groove 39 ends at the gap 31 , It cuts out of the lower contact surface 29 a the cross-section of the groove 39 corresponding area. Lubricant coming from the gap 31 exits, therefore preferably flows in the groove 39 and from there on down. This takes place at the exit point 41 , It is an exit point 41 for lubricants. As the lubricant in the groove 39 flows, gets in the groove 39 a flow path 43 for at the exit location 41 leaking lubricant formed. It can also be said that on the frame part 22 a flow path 43 for at the exit location 41 . 42 leaking lubricant is set up.

In the groove 39 is a sensor 48 with one end inserted so that its tip 51 in the immediate vicinity of the gap 31 is arranged. The sensor 48 is executed angled. In addition, the sensor is 48 outstretched, so that its electrical contact 53 is arranged outside of an area, which of the moving parts of the crank mechanism 2 is swept over. The sensor 48 is designed so that it allows a wired signal transmission.

The sensor 48 forms a temperature sensor 45 , This temperature sensor 45 is immediately outside the camp 17 at the exit 41 in the flow path 43 arranged.

This applies to every camp 17 to. So is every camp 17 one sensor each 48 arranged, with which a temperature in the manner described is receivable. This is in the described internal combustion engine for each camp 17 a device according to the invention 1 formed, which is suitable, a temperature of the respective bearing 17 to monitor.

The temperature sensor 45 has a temperature-dependent resistance. The groove 39 forms a measuring room, which is completed on three sides. The temperature sensor 45 is sensitive to a temperature change in an area that is within the groove 39 lies. Outside the groove 39 is the temperature sensor 45 not sensitive to a temperature change. So there is no measuring section outside the groove 39 lies. The sensitive area of the probe 48 is completely within the radial range of the crankshaft 3 is swept over. The sensitive area is beyond that of the crank webs 9 swept radial area. Inside the groove 39 There is a measuring section whose length is 10 times the width of the groove 39 is. This is at the in 4 embodiment shown not the case where the length-width ratio is shorter. In a further alternative embodiment it can be provided that the sensitive area only partially within the groove 39 lies.

In 2 is explicitly shown to be another sensor 49 on the side 35 of the frame part 22 is arranged, which is axially opposite to the side 33 at which the sensor 48 is arranged. Although not immediately apparent from the drawings, the frame part 22 formed symmetrically with respect to an axial plane. The same applies to the arrangement of the probes 48 . 49 , As in 3 indicated, is therefore on the frame part 22 another flow path 44 for at another exit point 42 leaking lubricant set up. Furthermore, another temperature sensor 46 immediately outside the camp 17 at the exit 42 in the further flow path 44 arranged. The further flow path is defined by a further groove 40 ,

Using the temperature sensors 45 . 46 a temperature can be recorded. This is with the in 1 to 4 shown embodiments, a method for monitoring a temperature at a warehouse 17 executable, with flowable lubricant from the warehouse 17 at an exit point 41 . 42 exit and at one the camp 17 holding frame part 22 in a flow path 43 . 44 along flows. This can be done in such a way that the temperature is immediately outside the warehouse 17 at the exit 41 . 42 in the flow path 43 . 44 is detected.

Furthermore, the in 1 to 3 shown device 1 an alarm device. This triggers a warning signal when exceeding a measured temperature of a comparison temperature by equal to or more than ΔT ₁ and causes the internal combustion engine is switched off when the deviation is equal to or more than ΔT ₂ . The settings of the alarm device can be engine-specific adapted and, as described above, also obtain a dependence on an operating condition of the engine. The comparison temperature used here is an average temperature, which is determined by averaging all temperature measurements at the bearings 17 results. Finally, in the in 1 to 3 illustrated embodiment of each camp 17 two temperature sensors each 45 . 46 , For the calculation of the average temperature therefore means are provided, with which this can be calculated. This can be done, for example, as already described above.

To prevent damage, improved bearing control is proposed. The invention relates to bearings 17 in which a flowable lubricant can escape. It is suggested a temperature immediately outside the camp 17 at the exit 41 . 42 in a flow path 43 . 44 capture.

LIST OF REFERENCE NUMBERS

1

contraption

2

crankshaft

3

crankshaft

5

shaft journal

7

crank pins

9

crank web

11

connecting rod

13

piston

15

flywheel

17

camp

19

upper bearing shell

21

lower bearing shell

22

frame part

23

side plates

25

bearing cap

27

channel

29

lower contact surface

31

gap

33

a page from 22

35

further page from 22

37

Surface of 22

39

groove

40

another groove

41

exit location

42

another exit point

43

flow path

44

another flow path

45

temperature sensor

46

another temperature sensor

48

probe

49

another sensor

51

Peak of 48

53

electrical contact

Claims (16)

A method for monitoring a temperature at a bearing (17), wherein flowable lubricant from the bearing (17) at an exit point (41, 42) emerges and on a bearing (17) holding the frame part (22) in a flow path (43, 44 ) flows along, characterized in that the temperature immediately outside the bearing (17) at the exit point (41, 42) in the flow path (43, 44) is detected. Method according to Claim 1 , characterized in that an alarm signal is generated when a temperature rise exceeds a threshold value. Method according to Claim 1 or 2 , characterized in that on the bearing (17) at at least two locations in each case an outlet location (41, 42) is formed, wherein lubricant from the bearing (17) at each exit point (41, 42) emerges and in each case at a warehouse ( 17) holding the frame part (22) in a flow path (43, 44) flows along and that in each case a temperature immediately outside the bearing (17) at each exit point (41, 42) in the respective flow path (43, 44) is detected. Method for monitoring the temperature of an arrangement of at least two bearings (17), characterized in that at each of the at least two bearings (17) in each case at least one temperature according to the method of one of Claim 1 to 3 is detected and monitored that from the temperatures thus detected, an average temperature is formed and that for the temperatures thus detected in each case one or the relative temperature difference is determined as a deviation of each detected temperature and average temperature. Device (2) for monitoring a temperature at a bearing (17), with a bearing part (17) holding the frame part (22), wherein the bearing (17) has an outlet point (41, 42) for lubricant and on the frame part (22 ) a flow path (43, 44) is arranged for lubricant exiting at the exit location (41, 42), characterized in that a temperature sensor (45) is provided immediately outside the bearing (17) at the exit location (41, 42) in the flow path (43, 44) , 46) is arranged. Device (2) according to Claim 5 , characterized in that the flow path (43, 44) is defined by a groove (39, 40) formed in a surface (37) of the frame part (22). Device (2) according to Claim 6 , characterized in that the groove (39, 40) extends from a contact surface (29) of the bearing (17). Device (2) according to one of Claims 6 to 7 , characterized in that the temperature sensor (45, 46) has a measuring sensor (48, 49) which is inserted at least in a measuring section in the groove (39, 40) in the flow path (43, 44) on the frame part (22). Device (2) according to Claim 8 , characterized in that the measuring section has a length which is at least a 10-times groove width. Device (2) according to one of Claims 8 or 9 , characterized in that the sensor (48, 49) is angled and / or that the sensor (48, 49) is made outstretched so that its electrical contact (53) is located outside a region of one of the bearings (17) part (3) is swept over during its movement. Device (2) according to one of Claims 8 to 10 , characterized in that the measuring sensor (48) is arranged in a closed at least two sides measuring space. Device (2) according to one of Claims 5 to 11 , characterized in that a signal of the temperature sensor (45, 46) is transmitted wirelessly. Device (2) according to one of Claims 5 to 12 , characterized in that the temperature sensor (45, 46) has a temperature-dependent resistance. Device (2) according to one of Claims 5 to 13 , characterized in that one or the measuring section of the measuring sensor (48) is arranged in a radial region swept by a rotating part (3), wherein the rotating part (3) is mounted in the bearing (17). Device (2) according to one of Claims 5 to 14 , characterized in that on the frame part (22) a further outlet point (41, 42) for lubricant is present, that on the frame part (22), a further flow path (43, 44) for at the further outlet location (41, 42) exiting Lubricant is set up and that immediately outside the bearing (17) at the further outlet location (41, 42) in the further flow path (43, 44), a further temperature sensor (45, 46) is arranged. Device (2) according to one of Claims 5 to 15 , characterized in that the frame part (22) comprises a bearing shell (19, 21), is a connecting rod (11) and / or forms a hollow cylinder.

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