A temperature measuring method for an outer ring of an end bearing of a transmission shaft of an engine accessory case

Abstract

The application belongs to the technical field of temperature measurement of the outer ring of the end bearing of the transmission shaft of the accessory gearbox of an engine, and particularly relates to a temperature measurement method for the outer ring of the end bearing of the transmission shaft of the accessory gearbox of an engine, which is designed to process a threaded hole on the accessory gearbox, and is designed to install a soft thermocouple through a stainless steel tube and a stud, measure the temperature on the outer side of the outer ring of the bearing, and reliably seal, so as to overcome the defects of the prior art.

Description

Technical Field

[0001] This application belongs to the field of temperature measurement technology for the outer ring of the end bearing of the drive shaft of an engine accessory housing, specifically relating to a method for measuring the temperature of the outer ring of the end bearing of the drive shaft of an engine accessory housing. Background Technology

[0002] The temperature of the outer rings of the bearings at both ends of the drive shaft of the engine accessory housing is usually measured using thermocouples, including:

[0003] The measurement is performed using armored thermocouples. Armored thermocouples are protected by armored shells and have a certain degree of rigidity. The accessory housing drive shaft has a complex structure and limited space, making it difficult to bend the armored thermocouple at a small curvature. It is also difficult to fit well against the surface of the component near the test location. When close to the rotor component, there is a significant installation risk.

[0004] Measurements are performed using soft thermocouples, including fluorinated or wire-coated soft thermocouples. Soft thermocouples are fixed to their leads by spot-welding thin sheets. However, they can only be welded to high-resistance metals such as nickel-based alloys and titanium alloys. They cannot be welded to accessories made of non-ferrous metals such as copper and aluminum, resulting in some leads being suspended and poor installation reliability.

[0005] This application is made in view of the aforementioned technical deficiencies.

[0006] It should be noted that the above background information is only used to assist in understanding the inventive concept and technical solution of this invention, and it does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0007] The purpose of this application is to provide a method for measuring the temperature of the outer ring of the end bearing of the drive shaft of an engine accessory housing, so as to overcome or mitigate at least one of the known technical defects.

[0008] The technical solution of this application is:

[0009] A method for measuring the temperature of the outer ring of the end bearing of the drive shaft of an engine accessory housing, comprising:

[0010] Machine threaded holes on the accessory housing, with threads of M5 or greater.

[0011] Machining studs with a diameter of 2mm and a length greater than or equal to x+2mm, where x is the wall thickness of the accessory housing; machining a through hole with a diameter of 2mm at the center of the stud.

[0012] Cut a stainless steel tube with a diameter of 2mm, a wall thickness of 0.1mm, and a length greater than or equal to y+x+50mm, where y is the suspended length of the soft thermocouple lead path from the threaded hole to the temperature measuring point on the outer side of the bearing outer ring.

[0013] A stainless steel tube is installed through a through hole and welded together. The front end of the stud is y mm away from the front end of the stainless steel tube.

[0014] Screw the stud into the threaded hole;

[0015] The probe of the soft thermocouple is passed through a stainless steel tube and installed at the temperature measuring point on the outer side of the bearing outer ring.

[0016] The stainless steel tube, along with the soft thermocouple leads, inserted into the accessory housing is bent along the path of the soft thermocouple leads.

[0017] Sealant was injected into the rear end of the stainless steel pipe.

[0018] According to at least one embodiment of this application, in the above-described method for measuring the temperature of the outer ring of the end bearing of the drive shaft of an engine accessory housing, the stainless steel tube and the stud are brazed together.

[0019] According to at least one embodiment of this application, in the above-described method for measuring the temperature of the outer ring of the end bearing of the drive shaft of the engine accessory housing, a stainless steel tube extending into the accessory housing, together with a soft thermocouple lead, is bent and shaped onto the bearing seat and fixed by spot welding a thin sheet.

[0020] This application has at least the following beneficial technical effects:

[0021] A method for measuring the temperature of the outer ring of the bearing at the end of the drive shaft of an engine accessory housing is provided. The method involves machining threaded holes on the accessory housing and designing stainless steel tubes and studs to install soft thermocouples, measuring the temperature of the outer side of the bearing outer ring, and achieving reliable sealing, thus overcoming the shortcomings of the prior art. Attached Figure Description

[0022] Figure 1 This is an assembly diagram of the stud and stainless steel tube provided in the embodiments of this application;

[0023] Figure 2 This is an assembly schematic diagram of a temperature measurement method for the outer ring of the end bearing of the drive shaft of an engine accessory housing provided in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of a temperature measurement method for the outer ring of the end bearing of the drive shaft of an engine accessory housing provided in an embodiment of this application;

[0025] in:

[0026] 1-Accessory housing; 2-Stud; 3-Stainless steel tube; 4-Soft thermocouple; 5-Bearing; 6-Bearing housing; 7-Drive shaft.

[0027] To better illustrate this embodiment, some parts in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual size of the product. Furthermore, the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Detailed Implementation

[0028] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0029] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer," etc., used in this application description to indicate relative direction or positional relationship are used only to indicate relative orientation or positional relationship, and do not imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, and therefore should not be construed as a limitation on this application. The terms "first," "second," "third," and similar terms used in this application description are used only for descriptive purposes to distinguish different components, and should not be construed as indicating or implying relative importance. The terms "a," "one," or "the," etc., used in this application description should not be construed as an absolute limitation on quantity, but should be construed as indicating the existence of at least one. The terms "including," "comprising," etc., used in this application description mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0030] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, terms such as “installation,” “connection,” and “linkage” used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can be a connection within two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0031] The following is in conjunction with the appendix Figures 1 to 3 This application will be described in further detail.

[0032] A method for measuring the temperature of the outer ring of the end bearing of the drive shaft of an engine accessory housing, comprising:

[0033] Machine a threaded hole on accessory housing 1, the threaded hole having a thread size greater than or equal to M5;

[0034] Machining stud 2, stud 2 having a diameter of 2mm and a length greater than or equal to x+2mm, where x is the wall thickness of accessory housing 1; machining a through hole with a diameter of 2mm at the center of stud 2.

[0035] Cut a stainless steel tube 3. The stainless steel tube 3 has a diameter of 2mm, a wall thickness of 0.1mm, and a length greater than or equal to y+x+50mm, where y is the suspension length of the lead path of the soft thermocouple 4 from the threaded hole to the temperature measuring point on the outer side of the outer ring of the bearing 5.

[0036] A through hole is made of stainless steel tube 3 and welded together. The front end of stud 2 is y mm away from the front end of stainless steel tube 3.

[0037] Screw stud 2 into the threaded hole;

[0038] The probe of the soft thermocouple 4 is passed through the stainless steel tube 3 and installed at the temperature measuring point on the outer side of the outer ring of the bearing 5. Specifically, it can be installed by spot welding a thin sheet or by opening a temperature measuring hole on the outer side of the outer ring of the bearing 5.

[0039] The stainless steel tube 3, which extends into the accessory housing 1, along with the lead wire of the soft thermocouple 4, is bent along the path of the lead wire of the soft thermocouple 4.

[0040] Inject sealant into the rear end of stainless steel pipe 3;

[0041] The above steps can be completed before assembling the bearing 5 and its corresponding bearing housing 6 at the other end, and before the rotating shaft 7, to avoid interference.

[0042] In some optional embodiments, in the above-described method for measuring the temperature of the outer ring of the end bearing of the engine accessory housing drive shaft, the stainless steel tube 3 and the stud 2 are brazed together.

[0043] In some optional embodiments, in the above-described method for measuring the temperature of the outer ring of the end bearing of the drive shaft of the engine accessory housing, the stainless steel tube 3 extending into the accessory housing 1, together with the lead wire of the soft thermocouple 4, is bent and formed onto the bearing seat 6 and fixed with a spot-welded sheet to increase the reliability of the fixation.

[0044] The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0045] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A method for temperature measurement of an outer ring of an end bearing of a transmission shaft of an engine accessory case, characterized in that, Comprising: Threaded hole is machined on the accessory case (1), the threaded hole is greater than or equal to M5 thread; Machining stud (2), the diameter of stud (2) is 2mm, the length is greater than or equal to x+2mm, wherein, x is the wall thickness of accessory case (1), a through hole is machined in the center of stud (2), the diameter of the through hole is 2mm; Cutting stainless steel tube (3), the diameter of stainless steel tube (3) is 2mm, the wall thickness is 0.1mm, the length is greater than or equal to y+x+50mm, wherein, y is the length of soft thermocouple (4) lead path suspended from the threaded hole to the temperature measuring point outside the outer ring of bearing (5); The stainless steel tube (3) is set through the through hole, welded and connected, the front end of stud (2) is ymm away from the front end of stainless steel tube (3); The stud (2) is screwed into the threaded hole; The probe of soft thermocouple (4) is passed through stainless steel tube (3) and installed at the temperature measuring point outside the outer ring of bearing (5); The stainless steel tube (3) and the lead of soft thermocouple (4) that extend into the accessory case (1) are bent along the lead path of soft thermocouple (4). Sealing glue is poured at the rear end of stainless steel tube (3).

2. The temperature measuring method for the outer ring of the end bearing of the transmission shaft of the accessory case of the engine according to claim 1, characterized in that, The stainless steel tube (3) and stud (2) are welded by brazing.

3. The temperature measuring method for the outer ring of the end bearing of the transmission shaft of the accessory case of the engine according to claim 1, characterized in that, The stainless steel tube (3) and the lead of soft thermocouple (4) that extend into the accessory case (1) are bent and formed on the bearing seat (6) to be fixed by spot welding sheet.

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