Brush type sealing friction wear test tool and high-temperature friction wear test device

Abstract

The utility model discloses a brush type seal friction wear test tool and a high-temperature friction wear test device. The brush type seal friction wear testing tool comprises a connecting base body, a metal brush wire bundle fixing structure, a positioning connecting assembly, at least one limiting component and a metal brush wire bundle, the connecting base body is used for being connected with a high-temperature friction wear testing machine, and the metal brush wire bundle is fixed to the metal brush wire bundle fixing structure. The metal brush wire bundle fixing structure is rotationally connected with the connecting base body through the positioning connecting assembly, the metal brush wire bundle and the metal brush wire bundle fixing structure can rotate around the positioning connecting assembly, and the limiting component is movably connected with the connecting base body. The limiting part can move between a first position and a second position in the first direction. According to the utility model, the problem that the actual contact mode between the brush type sealing metal brush wire bundle and the rotor wear-resistant coating cannot be accurately simulated by the existing friction wear test equipment is solved.

Description

Technical Field

[0001] The utility model particularly relates to a brush-type seal friction and wear testing tool and a high-temperature friction and wear testing device, belonging to the technical field of high-temperature friction. Background Art

[0002] Brush seal is a flexible contact friction dynamic seal structure used in advanced gas turbines and aircraft engines. It is mainly composed of a front baffle, a metal brush bundle, a rear baffle and a rotor. Unlike traditional grate seals, brush seals use metal brush wires to contact the rotor. The flexibility of the brush wires enables them to continuously contact the rotor surface and maintain excellent sealing performance. In addition, there is a certain inclination angle between the metal brush wires and the rotor. This design makes the brush wires act as a spring, effectively avoiding the permanent increase of the sealing gap between the seal and the rotating part due to direct long-term high-frequency friction with the rotor. According to relevant reports, replacing traditional grate seals with brush seals can reduce engine seal leakage by 80%, reduce engine fuel consumption by 3-5%, and increase thrust by 1-3%. However, during operation, friction between the brush wires and the wear-resistant coating on the rotor surface will inevitably occur, causing wear on the sealing interface, which in turn affects the sealing performance and service life of the brush seal. Therefore, studying the friction and wear characteristics of brush seals has important scientific value and engineering significance for improving the reliability of aircraft engines.

[0003] Existing friction and wear test equipment mainly adopts pin-disc or ring-block test methods. The contact mode of the friction pair is mostly point contact, line contact or surface contact. It is difficult to accurately simulate the actual contact mode between the brush seal metal brush wire and the rotor wear-resistant coating, and cannot provide scientific support for the development and performance evaluation of new wear-resistant coating materials. Therefore, it is urgent to develop a test device that can be used to evaluate the friction and wear behavior of brush seals. Utility Model Content

[0004] The main purpose of the utility model is to provide a brush seal friction and wear testing tool and a high-temperature friction and wear testing device, which solves the problem that existing friction and wear testing equipment is difficult to accurately simulate the actual contact mode between the brush seal metal brush wire bundle and the rotor wear-resistant coating, and cannot provide scientific support for the development and performance evaluation of new wear-resistant coating materials.

[0005] In order to achieve the above-mentioned utility model purpose, the technical solution adopted by the utility model includes:

[0006] A first aspect of an embodiment of the utility model provides a brush seal friction and wear test fixture applied to a high temperature friction and wear tester, comprising:

[0007] A connecting base, a metal brush wire bundle fixing structure, a positioning connection assembly, at least one limiting component and a metal brush wire bundle, wherein the connecting base is used to be connected to a high-temperature friction and wear testing machine, the metal brush wire bundle is fixed on the metal brush wire bundle fixing structure, the metal brush wire bundle fixing structure is rotatably connected to the connecting base via the positioning connection assembly, the metal brush wire bundle and the metal brush wire bundle fixing structure can rotate around the positioning connection assembly, the limiting component is movably connected to the connecting base, and the limiting component can move between a first position and a second position along a first direction,

[0008] When the limiting component is located at the first position, the limiting component is located on the rotation trajectory of the metal brush filament bundle fixing structure, or the limiting component is connected to the metal brush filament bundle fixing structure, the metal brush filament bundle fixing structure and the connecting base are locked, and the metal brush filament bundle fixing structure is in a fixed state, and when the limiting component is located at the second position, the limiting component is located outside the rotation trajectory of the metal brush filament bundle fixing structure, or the connection between the limiting component and the metal brush filament bundle fixing structure is released, and the metal brush filament bundle fixing structure can rotate freely around the positioning connection component.

[0009] The second aspect of the embodiment of the utility model provides a high-temperature friction and wear testing device, which includes: a high-temperature friction and wear testing machine and a brush-type seal friction and wear testing tool used for the high-temperature friction and wear testing machine, wherein the connecting base of the brush-type seal friction and wear testing tool is detachably mounted on the high-temperature friction and wear testing machine.

[0010] Compared with the prior art, the advantages of the utility model include:

[0011] The brush seal friction and wear test tooling used in a high temperature friction and wear tester provided by the embodiment of the utility model solves the problem that the existing friction and wear test equipment cannot accurately simulate the actual contact mode between the brush seal metal brush bundle and the rotor wear-resistant coating;

[0012] The embodiment of the utility model provides a brush-type seal friction and wear testing tool for a high-temperature friction and wear testing machine. By setting a limiting hole on the metal brush wire bundle fixing structure and setting a limiting component that cooperates with it, the metal brush wire bundle fixing structure can rotate freely around the positioning connection component. By adjusting the position of the limiting component, the metal brush wire bundle fixing structure can be locked and unlocked, thereby flexibly changing the contact angle between the metal brush wire bundle and the sample surface.

[0013] The brush seal friction and wear testing tool for a high temperature friction and wear testing machine provided in an embodiment of the utility model can be widely used in existing commercial high temperature friction and wear testing machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a front view of a brush seal friction and wear test tooling used in a high temperature friction and wear tester provided in a typical implementation case of the utility model;

[0016] Figure 2 It is a left view of a brush seal friction and wear test fixture applied to a high temperature friction and wear tester provided in a typical implementation case of the utility model;

[0017] Figure 3 It is a rear view of a brush seal friction and wear test fixture applied to a high temperature friction and wear tester provided in a typical implementation case of the utility model;

[0018] Figure 4 It is a front view of a metal brush bundle fixing structure and a metal brush bundle provided in a typical implementation case of the utility model;

[0019] Figure 5 It is a left view of a metal brush bundle fixing structure and a metal brush bundle provided in a typical implementation case of the utility model. DETAILED DESCRIPTION

[0020] In view of the deficiencies in the prior art, the inventor of this case has proposed the technical solution of the utility model after long-term research and extensive practice. The technical solution, its implementation process and principle will be further explained as follows.

[0021] A first aspect of an embodiment of the utility model provides a brush seal friction and wear test fixture applied to a high temperature friction and wear tester, comprising:

[0022] A connecting base, a metal brush wire bundle fixing structure, a positioning connection assembly, at least one limiting component and a metal brush wire bundle, wherein the connecting base is used to be connected to a high-temperature friction and wear testing machine, the metal brush wire bundle is fixed on the metal brush wire bundle fixing structure, the metal brush wire bundle fixing structure is rotatably connected to the connecting base via the positioning connection assembly, the metal brush wire bundle and the metal brush wire bundle fixing structure can rotate around the positioning connection assembly, the limiting component is movably connected to the connecting base, and the limiting component can move between a first position and a second position along a first direction,

[0023] When the limiting component is located at the first position, the limiting component is located on the rotation trajectory of the metal brush filament bundle fixing structure, or the limiting component is connected to the metal brush filament bundle fixing structure, the metal brush filament bundle fixing structure and the connecting base are locked, and the metal brush filament bundle fixing structure is in a fixed state, and when the limiting component is located at the second position, the limiting component is located outside the rotation trajectory of the metal brush filament bundle fixing structure, or the connection between the limiting component and the metal brush filament bundle fixing structure is released, and the metal brush filament bundle fixing structure can rotate freely around the positioning connection component.

[0024] Furthermore, the connecting base has a clamping structure, which includes a first clamping portion and a second clamping portion spaced apart along the first direction, and a part of the metal brush bundle fixing structure is movably disposed between the first clamping portion and the second clamping portion.

[0025] Exemplarily, the connecting base can be a connecting rod, the clamping structure is arranged at the lower end of the connecting rod, and the upper end of the connecting rod has a positioning structure, which is used for positioning and connecting with a high-temperature friction and wear testing machine. The positioning structure can be a structure with planar features, etc.

[0026] Furthermore, the positioning connection assembly includes a third bolt and a first movable nut matching the third bolt, and one end of the third bolt passes through the first clamping portion, the metal brush bundle fixing structure, the second clamping portion, and is threadedly connected to the first movable nut.

[0027] Furthermore, the limiting component is threadedly connected to the connecting base, and by screwing the limiting component, the limiting component can be moved relative to the connecting base along the first direction.

[0028] Furthermore, the metal brush bundle fixing structure is provided with a through hole, a notch or a slot for the limiting component to partially enter. Exemplarily, the limiting component may be a threaded member such as a bolt.

[0029] In a more specific implementation, a brush seal friction and wear test fixture applied to a high temperature friction and wear tester comprises: two limiting components, the two limiting components are respectively threadedly connected to the first clamping part and the second clamping part;

[0030] When the two limiting components are located at the first position, the two limiting components are located on both sides of the metal brush bundle fixing structure along the movement trajectory of the metal brush bundle fixing structure, or the two limiting components extend into the through holes or slots on the metal brush bundle fixing structure.

[0031] In a more specific embodiment, the metal brush filament bundle fixing structure includes a first baffle, a second baffle and at least one fastening assembly, the first baffle and the second baffle are arranged in sequence along the first direction, the first baffle and the second baffle are detachably connected via a fastening structure, and the metal brush filament bundle can be clamped and fixed between the first baffle and the second baffle.

[0032] Furthermore, the first baffle plate and the second baffle plate both have through holes or slots that cooperate with the limiting components. When the two limiting components are located at the first position, the two limiting components are respectively and correspondingly arranged in the through holes or slots of the first baffle plate and the second baffle plate.

[0033] Furthermore, the metal brush bundle fixing structure includes a connecting portion and a fixing portion which are arranged in sequence, the connecting portion cooperates with the positioning connection assembly and the limiting component, and the connecting portion and the fixing portion are arranged at an angle.

[0034] Furthermore, the first baffle includes a first connecting portion and a first fixing portion which are arranged in sequence, and the first connecting portion and the first fixing portion are arranged at an angle, and the second baffle includes a second connecting portion and a second fixing portion which are arranged in sequence, and the second connecting portion and the second fixing portion are arranged at an angle, and the first connecting portion and the second connecting portion jointly form the connecting portion, and the first fixing portion covers a portion of the second fixing portion, and a portion of the metal brush wire bundle is clamped and fixed between the first fixing portion and the second fixing portion, and the other portion is arranged on the second fixing portion and protrudes to one end of the second fixing portion.

[0035] Further, the fastening assembly is connected to the first fixing portion and the second fixing portion. Exemplarily, the fastening component may be a bolt or a kit of a bolt and a nut.

[0036] The second aspect of the embodiment of the utility model provides a high-temperature friction and wear testing device, which includes: a high-temperature friction and wear testing machine and a brush-type seal friction and wear testing tool used for the high-temperature friction and wear testing machine, wherein the connecting base of the brush-type seal friction and wear testing tool is detachably mounted on the high-temperature friction and wear testing machine.

[0037] The technical solution, its implementation process and principles, etc. will be further explained below in conjunction with the accompanying drawings and specific implementation cases. Unless otherwise specified, the functional components used in the following embodiments are all known to those skilled in the art, and can be obtained by commercial purchase or conventional processes known in the art, and their specific product models, etc. are not limited here.

[0038] Example

[0039] See also Figure 1-Figure 5 , a brush seal friction and wear test fixture used in a high temperature friction and wear tester, comprising a connecting rod 1, a first baffle 4, a second baffle 7, a metal brush wire bundle 8, a set of positioning connection components, two limiting components, and two sets of fastening components;

[0040] The first baffle 4 and the second baffle 7 are detachably connected via two groups of fastening components to form a metal brush bundle fixing structure for fixing the metal brush bundle. The metal brush bundle 8 is fixed between the first baffle 4 and the second baffle 7. The upper end of the connecting rod 1 has a positioning structure for positioning and connecting with a high-temperature friction and wear testing machine. The lower end of the connecting rod 1 cooperates with the metal brush bundle fixing structure via a group of positioning connection components and two limiting components. The metal brush bundle fixing structure as a whole can rotate around the positioning connection component. The limiting component is connected to the connecting rod 1 and has two working states. The first working state is: preventing the metal brush bundle fixing structure from rotating around the positioning connection component. The second working state is allowing the metal brush bundle fixing structure to rotate around the positioning connection component.

[0041] In this embodiment, a clamping and fixing space for fixing the metal brush filament bundle is formed between the first baffle plate 4 and the second baffle plate 7, and the width of the clamping and fixing space can be adjusted via two sets of fastening components, thereby achieving clamping and fixing of the metal brush filament bundle. It should be noted that the length / extension direction of the metal brush filament bundle 8 is always set at an angle to the length direction / axial direction of the connecting rod 1.

[0042] In this embodiment, the first baffle 4 includes a first connecting portion and a first fixing portion which are arranged in sequence, and the first connecting portion and the first fixing portion are arranged at an angle. The second baffle 7 includes a second connecting portion and a second fixing portion which are arranged in sequence, and the second connecting portion and the second fixing portion are arranged at an angle. The first connecting portion and the second connecting portion together form a connecting portion of a metal brush wire bundle fixing structure, and the first fixing portion covers a portion of the second fixing portion. A portion of the metal brush wire bundle 8 is clamped and fixed between the first fixing portion and the second fixing portion, and the other portion is arranged on the second fixing portion and protrudes to one end of the second fixing portion.

[0043] It should be noted that the angle between the first connecting part and the first fixed part is the same as the angle between the second connecting part and the second fixed part, and the length of the second fixed part is greater than the length of the first fixed part. By setting the first connecting part and the first fixed part, and the second connecting part and the second fixed part at an angle, the metal brush wire bundle fixed between the first fixed part and the second fixed part is inclined at a certain angle (the inclination angle can be understood as being inclined relative to the length direction of the connecting rod), so that the metal brush wire bundle can better maintain contact with the rotor wear-resistant coating required for the test and avoid interference from other structures.

[0044] In this embodiment, the two groups of fastening components are matched with the first fixing part of the first baffle plate 4 and the second fixing part of the second baffle plate 7. Specifically, the two groups of fastening components include a fourth bolt 6, a second movable nut 11 and a fifth bolt 5, a third movable nut 12. Two through holes are correspondingly provided on the first fixing part of the first baffle plate 4 and the second fixing part of the second baffle plate 7. The fourth bolt 6 and the fifth bolt 5 respectively pass through a through hole and are threadedly connected with the second movable nut 11 and the third movable nut 12. The first baffle plate 4 and the second baffle plate 7 can be fastened by screwing the second movable nut 11, the third movable nut 12 and / or the fourth bolt 6, the fifth bolt 5.

[0045] In this embodiment, the connecting part of the metal brush wire bundle fixing structure is arranged between the first clamping part and the second clamping part at the lower end of the connecting rod, and the positioning connection assembly includes a third bolt 3 and a first movable nut 10. The third bolt 3 passes through the first clamping part, the connecting part of the metal brush wire bundle fixing structure, and the second clamping part along the first direction and is connected to the first movable nut 10. The connecting part of the metal brush wire bundle fixing structure and the third bolt 3 are clearance-matched, that is, the surface of the through hole on the metal brush wire bundle fixing structure that matches the third bolt 3 is smooth, and the aperture of the through hole on the metal brush wire bundle fixing structure that matches the third bolt 3 should be slightly larger than the diameter of the third bolt 3, so that the metal brush wire bundle fixing structure can rotate around the third bolt 3, so that the contact angle between the metal brush wire bundle and the surface of the sample to be tested can be flexibly adjusted.

[0046] In this embodiment, the two limiting components include a first bolt 2 and a second bolt 9. The first clamping part and the second clamping part are respectively provided with threaded holes passing through the first direction. The first bolt 2 is threadedly connected to the first clamping part via the threaded hole of the first clamping part, and the second bolt 9 is threadedly connected to the second clamping part via the threaded hole of the second clamping part. By screwing the first bolt 2 and / or the second bolt 9, the first bolt 2 and / or the second bolt 9 can move forward or backward along the first direction, and the first bolt 2 and the second bolt 9 can be connected to, contact or be located on the movement trajectory of the metal brush wire bundle fixing structure, so as to achieve locking of the metal brush wire bundle fixing structure, so that the metal brush wire bundle fixed on the metal brush wire bundle fixing structure presents a specified inclination angle.

[0047] Exemplarily, a plurality of first limiting holes are provided on the first baffle plate 4 of the metal brush wire bundle fixing structure, and a plurality of second limiting holes are provided on the second baffle plate 7. When the first bolt 2 is screwed, one end of the first bolt 2 can enter the first limiting hole on the first baffle plate 4, so that the angle or position of the metal brush wire bundle fixing structure is fixed. By allowing one end of the first bolt 2 to enter different first limiting holes on the first baffle plate 4, the metal brush wire bundle fixing structure can be fixed at multiple angles or positions. Accordingly, the cooperation mode between the second bolt 9 and the second baffle plate 7 is the same as the cooperation mode between the first bolt 2 and the first baffle plate 4. It should be noted that the first limiting hole and the second limiting hole can be through-holes or non-through slots.

[0048] In this embodiment, the material used for the metal brush bundle 8 is GH5605 or Haynes25, and is inclined at a certain angle. All of the above components need to be made of high-temperature alloys to ensure the high-temperature resistance of the tooling.

[0049] The brush seal friction and wear test fixture provided by the embodiment of the utility model for use in a high-temperature friction and wear tester solves the problem that the existing friction and wear test equipment cannot accurately simulate the actual contact mode between the brush seal metal brush wire bundle and the rotor wear-resistant coating. The fixture can be directly applied to a commercial high-temperature friction and wear tester to examine the friction and wear behavior between the brush seal metal brush wire and the rotor wear-resistant coating, and obtain tribological parameters such as friction coefficient and wear rate, which has important scientific significance and practical value for the study of the friction and wear performance of brush seal components.

[0050] The embodiment of the utility model provides a brush-type seal friction and wear testing tool for use in a high-temperature friction and wear testing machine. By setting a limiting hole on the metal brush wire bundle fixing structure and setting a limiting component that cooperates with it, the metal brush wire bundle fixing structure can rotate freely around the positioning connection component. By adjusting the position of the limiting component, the metal brush wire bundle fixing structure can be locked and unlocked, thereby being able to flexibly change the contact angle between the metal brush wire bundle and the sample surface, so that the tool in the utility model can be widely used in existing commercial high-temperature friction and wear testing machines.

[0051] It should be understood that the above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A brush seal friction and wear test fixture, applied to a high temperature friction and wear tester, characterized in that: include: A connecting base, a metal brush wire bundle fixing structure, a positioning connection assembly, at least one limiting component and a metal brush wire bundle, wherein the connecting base is used to be connected to a high-temperature friction and wear testing machine, the metal brush wire bundle is fixed on the metal brush wire bundle fixing structure, the metal brush wire bundle fixing structure is rotatably connected to the connecting base via the positioning connection assembly, the metal brush wire bundle and the metal brush wire bundle fixing structure can rotate around the positioning connection assembly, the limiting component is movably connected to the connecting base, and the limiting component can move between a first position and a second position along a first direction, When the limiting component is located at the first position, the limiting component is located on the rotation trajectory of the metal brush filament bundle fixing structure, or the limiting component is connected to the metal brush filament bundle fixing structure, the metal brush filament bundle fixing structure and the connecting base are locked, and the metal brush filament bundle fixing structure is in a fixed state, and when the limiting component is located at the second position, the limiting component is located outside the rotation trajectory of the metal brush filament bundle fixing structure, or the connection between the limiting component and the metal brush filament bundle fixing structure is released, and the metal brush filament bundle fixing structure can rotate freely around the positioning connection component.

2. The brush seal friction and wear testing tool according to claim 1, characterized in that: The connecting base has a clamping structure, which includes a first clamping portion and a second clamping portion spaced apart along the first direction, and a part of the metal brush bundle fixing structure is movably disposed between the first clamping portion and the second clamping portion.

3. The brush seal friction and wear testing tool according to claim 2, characterized in that: The positioning connection assembly includes a third bolt and a first movable nut matching the third bolt. One end of the third bolt passes through the first clamping portion, the metal brush bundle fixing structure, and the second clamping portion, and is threadedly connected to the first movable nut.

4. The brush seal friction and wear testing tool according to claim 3, characterized in that: The limiting component is threadedly connected to the connection base, and by screwing the limiting component, the limiting component can be moved relative to the connection base along the first direction.

5. The brush seal friction and wear testing tool according to claim 4, characterized in that: The metal brush bundle fixing structure is provided with a through hole, a notch or a slot hole into which the limiting component can partially enter.

6. The brush seal friction and wear testing tool according to claim 4, characterized in that: include: Two limiting components, the two limiting components are respectively threadedly connected to the first clamping part and the second clamping part; When the two limiting components are located at the first position, the two limiting components are located on both sides of the metal brush bundle fixing structure along the movement trajectory of the metal brush bundle fixing structure, or the two limiting components extend into the through holes or slots on the metal brush bundle fixing structure.

7. The brush seal friction and wear testing tool according to claim 6, characterized in that: The metal brush filament bundle fixing structure includes a first baffle, a second baffle and at least one fastening assembly. The first baffle and the second baffle are arranged in sequence along the first direction. The first baffle and the second baffle are detachably connected via the fastening structure. The metal brush filament bundle can be clamped and fixed between the first baffle and the second baffle.

8. The brush seal friction and wear testing tool according to claim 7, characterized in that: The first baffle plate and the second baffle plate both have through holes or slots that cooperate with the limiting components. When the two limiting components are located at the first position, the two limiting components are respectively and correspondingly arranged in the through holes or slots of the first baffle plate and the second baffle plate.

9. The brush seal friction and wear testing tool according to claim 7, characterized in that: The metal brush bundle fixing structure includes a connecting portion and a fixing portion which are arranged in sequence, the connecting portion cooperates with the positioning connection assembly and the limiting component, and the connecting portion and the fixing portion are arranged at an angle.

10. The brush seal friction and wear testing tool according to claim 9, characterized in that: The first baffle includes a first connecting portion and a first fixing portion which are arranged in sequence, and the first connecting portion and the first fixing portion are arranged at an angle. The second baffle includes a second connecting portion and a second fixing portion which are arranged in sequence, and the second connecting portion and the second fixing portion are arranged at an angle. The first connecting portion and the second connecting portion jointly form the connecting portion, and the first fixing portion covers a portion of the second fixing portion. A portion of the metal brush filament bundle is clamped and fixed between the first fixing portion and the second fixing portion, and the other portion is arranged on the second fixing portion and protrudes to one end of the second fixing portion.

11. The brush seal friction and wear testing tool according to claim 10, characterized in that: The fastening assembly is connected to the first fixing portion and the second fixing portion.

12. A high temperature friction and wear testing device, characterized in that: include: A high temperature friction and wear testing machine and the brush seal friction and wear testing tool as described in any one of claims 1 to 11, wherein the connecting base of the brush seal friction and wear testing tool is detachably mounted on the high temperature friction and wear testing machine.

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