Structure for low-speed running-in of mechanical seal
By designing a low-speed break-in structure for the mechanical seal, the problem of lubricating oil leakage caused by the lack of break-in before assembly of the air turbine starter sealing components was solved, thereby improving the sealing performance and ensuring the reliability of the sealing components on the air turbine starter.
Patent Information
- Application Number
- CN202520414932.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-03-10
AI Technical Summary
The existing air turbine starter sealing components were not broken in before assembly, resulting in poor sealing performance under actual working conditions and oil leakage. Furthermore, the existing break-in device cannot simulate the pressure and temperature environment of the air turbine starter.
A low-speed break-in structure for a mechanical seal is designed, comprising an oil sump housing, a support component, a mounting housing, and an output shaft. A test unit is installed through the support component to simulate the actual working conditions of an air turbine starter, thereby conducting low-speed break-in of the sealing components and ensuring improved sealing performance.
It effectively solves the problem of low-speed break-in before the sealing components are assembled, significantly improves the reliability of the sealing components, and ensures optimized sealing performance on air turbine starters.
Smart Images
Figure CN223808109U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to power system technical field relates to a mechanical seal structure's running -in tool, specifically relates to a kind of structure of mechanical seal low-speed running -in. BACKGROUND
[0002] Mechanical seal is widely used in air turbine starter of aeroengine, generally, when air turbine starter works with engine, prevent the leakage of oil in the cavity of air turbine starter to the cavity outside starter.
[0003] At present, air turbine starter sealing assembly does not carry out sealing assembly running -in before assembly, and if not carrying out component running -in test before assembly, due to insufficient running -in, the sealing assembly is seriously worn under the actual working condition of air turbine starter, and the sealing performance does not meet the requirements, and different degrees of oil leakage problem can occur when air turbine starter works.
[0004] At present, there is no running -in device for the sealing assembly of air turbine starter, and the existing running -in device cannot simulate the pressure and temperature working state of air turbine starter. INVENTION CONTENTS
[0005] In order to solve the above problems, the utility model provides a kind of structure of mechanical seal low-speed running -in, which is to run -in as close as possible to the actual working condition of air turbine starter before sealing assembly is assembled to air turbine starter, to ensure that the sealing assembly is in good condition when assembled on air turbine starter, and to improve the sealing performance.
[0006] The utility model provides the following scheme:
[0007] A structure for mechanical seal low-speed running -in, comprising an oil pool shell, a support component, an installation shell and an output shaft, a test unit is installed in the installation shell through the support component, the other end of the installation shell is connected to the oil pool shell, and the output shaft is drivenly connected with the test unit from the outside.
[0008] Further, the installation shell is a cylindrical structure, has a cylindrical cavity inside, one end of the installation shell is provided with a large opening matched with the support component, and the oil pool shell is installed at one end of the large opening of the installation shell; the other end of the installation shell is provided with a small opening matched with the sealing surface of the test unit, the test unit is sealed at the small opening of the installation shell, and the test unit is fixed by the support component.
[0009] Further, the support component is a cylindrical structure, the support component is provided with a bearing matched with the cylindrical cavity of the installation shell outside, the support component is provided with a central shaft in the center, and the test unit is installed on the central shaft of the support component in interference fit.
[0010] Further, the center shaft of the support component is connected with the cylindrical structure through an angular contact ball bearing, the bearing with the outer ring being the support component is a deep groove ball bearing, and the cylindrical structure of the support component is an inner ring of the deep groove ball bearing.
[0011] Further, one end of the output shaft is connected with the external motor through an external spline, and the other end is connected with the center shaft of the support component through triangular positioning; and the middle section of the output shaft passes through the test unit.
[0012] Further, the oil pool shell is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are in communication with the cylindrical cavity of the mounting shell.
[0013] The beneficial effects of the present application are as follows:
[0014] 1. The use of the present application can effectively solve the low-speed running-in problem of the mechanical seal assembly before assembly, and significantly improve the reliability of the seal assembly.
[0015] 2. The oil pool shell is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are in communication with the cylindrical cavity of the mounting shell. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical scheme of the utility model patent embodiment, the following will be briefly introduced the drawings needed to be used in the embodiment, it should be understood, the following drawings only show some embodiments of the utility model patent, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other related drawings according to these drawings.
[0017] Figure 1 It is a structural schematic diagram of the utility model;
[0018] Figure 2 It is Figure 1 rear view schematic diagram;
[0019] Wherein, 1—oil pool shell; 2—support component; 3—test unit; 4—mounting shell; 5—output shaft. DETAILED DESCRIPTION
[0020] This part is the embodiment of the utility model, for explaining and illustrating the technical scheme of the utility model. In the case of no conflict, the embodiments of the utility model and the features in the embodiments can be combined with each other.
[0021] In the description of the utility model, it needs to be understood that, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or position relationship of the drawings, and are only for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as indicating or implying that the indicated device or the case must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can be explicitly or implicitly included. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0022] In the description of the utility model, it needs to be understood that, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or position relationship of the drawings, and are only for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as indicating or implying that the indicated device or the case must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can be explicitly or implicitly included. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0023] The utility model aims at providing a kind of structure for the low-speed running-in of mechanical seal, to solve the problems existing in the mechanical seal of current air turbine starter. Mainly low-speed running-in before assembly, improve the reliability of sealing assembly. To make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the utility model is further described in detail below with the drawings and specific embodiments.
[0024] Embodiment 1:
[0025] A kind of structure for the low-speed running-in of mechanical seal, including oil pool shell 1, support component 2, installation shell 4 and output shaft 5;Test unit 3 is installed in installation shell 4 by support component 2, installation shell 4 other end is connected oil pool shell 1, output shaft 5 is driven connection from outside with test unit 3.
[0026] Installation shell 4 is cylindrical structure, with cylindrical cavity in the inside, one end of installation shell 4 is equipped with the large opening of cooperation support component 2, oil pool shell 1 is installed at the large opening one end of installation shell 4;The other end of installation shell 4 is equipped with the small opening of cooperation test unit 3 sealing surface, test unit 3 is sealed at the small opening of installation shell 4, test unit 3 is fixed by support component 2.
[0027] The support component 2 is a cylindrical structure, the support component 2 is externally provided with a bearing matched with the cylindrical cavity of the mounting shell 4, and the support component 2 is centrally provided with a central shaft; the test unit 3 is in interference fit on the central shaft of the support component 2.
[0028] The central shaft of the support component 2 is connected with the cylindrical structure through an angular contact ball bearing, the bearing with the outer ring being the support component 2 is a deep groove ball bearing, and the cylindrical structure of the support component 2 is an inner ring of the deep groove ball bearing.
[0029] One end of the output shaft 5 is connected with an external motor through an external spline, the other end is connected with the central shaft of the support component 2 through triangular positioning, and the middle section of the output shaft 5 passes through the test unit 3.
[0030] The oil pool shell 1 is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are communicated with the cylindrical cavity of the mounting shell 4.
[0031] Embodiment 2:
[0032] As shown in Figure 1 The utility model discloses a transmission shaft structure mainly includes: oil pool shell, support component, test unit, mounting shell, output shaft, wherein the mounting shell has the hole of installing on test bench, and the output shaft is used for the whole structure and test bench coupling.
[0033] The transmission shaft assembly process of the utility model mainly divides into three steps, first, the test unit is assembled to the support component, then the whole is fixed on the mounting shell through the screw, finally, the oil pool shell is assembled on the whole structure. When testing, the output shaft is inserted into the corresponding position.
[0034] After assembling, the whole structure can be fixed on the test bench through the hole on the mounting shell, and the output shaft is coupled to the test bench driving device, so that the sealing assembly in the test unit is driven to rotate at low speed. During testing, temperature, oil position and the like can better match the actual working condition, and the reliability of the sealing assembly on the air turbine starter is improved.
[0035] The test unit 3 is in interference fit on the support component 2;
[0036] The support component 2 is screwed on the mounting shell 4 through the screw;
[0037] The mounting shell 4 is screwed with the oil pool shell 1 through the screw;
[0038] The oil pool shell 1 is provided with an oil inlet and an oil outlet.
[0039] The support component is composed of a deep groove ball bearing, an angular contact ball bearing and a central shaft.
[0040] The test unit is in interference fit on the central shaft of the support component.
[0041] The end face of the test unit installed on the support member jumps no more than 0.03.
[0042] When testing after the structure is assembled, 200ml of lubricating oil needs to be added in the cavity.
[0043] The lubricating oil liquid level line is near the central axis of the test unit.
[0044] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application.
Claims
1. A structure for mechanically sealing low speed run-in, characterized by, The oil pool shell (1), the supporting part (2), the mounting shell (4) and the output shaft (5) are included; the test unit (3) is installed in the mounting shell (4) through the supporting part (2), the other end of the mounting shell (4) is connected with the oil pool shell (1), and the output shaft (5) is externally connected with the test unit (3) in drive.
2. The structure for mechanical sealing low speed running-in according to claim 1, characterized in that, The mounting shell (4) is a cylindrical structure, has a cylindrical cavity inside, and is provided with a large opening at one end for matching the supporting part (2), and the oil pool shell (1) is installed at the large opening end of the mounting shell (4); the other end of the mounting shell (4) is provided with a small opening for matching the sealing surface of the test unit (3), the test unit (3) is sealed at the small opening of the mounting shell (4), and the test unit (3) is fixed by the supporting part (2).
3. The structure for mechanical sealing low speed running-in according to claim 2, characterized in that, The supporting part (2) is a cylindrical structure, the supporting part (2) is provided with a bearing for matching the cylindrical cavity of the mounting shell (4) outside, the supporting part (2) is provided with a center shaft in the center, and the test unit (3) is installed on the center shaft of the supporting part (2) in interference fit.
4. The structure for mechanical sealing low speed running-in according to claim 3, characterized in that, The center shaft of the supporting part (2) is connected with the cylindrical structure through an angular contact ball bearing, the bearing with the outer ring of the supporting part (2) is a deep groove ball bearing, and the cylindrical structure of the supporting part (2) is the inner ring of the deep groove ball bearing.
5. The structure for mechanical sealing low speed running-in according to claim 3, characterized in that, One end of the output shaft (5) is connected with an external motor through an external spline, the other end is connected with the center shaft of the supporting part (2) through triangular positioning, and the middle segment of the output shaft (5) passes through the test unit (3).
6. The structure for mechanical sealing low speed running-in according to claim 2, characterized in that, The oil pool shell (1) is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are communicated with the cylindrical cavity of the mounting shell (4).