Hydraulic system of shield main bearing damage simulation test bench

Abstract

The invention relates to a hydraulic system of a shield main bearing damage simulation test bench, and relates to the technical field of hydraulic loading. The system comprises an oil tank, an air filter, a radial force loading loop, an axial force loading loop and an overturning moment loading loop, the air filter is arranged in the oil tank, and the ends of the air filter, the radial force loading loop, the axial force loading loop and the overturning moment loading loop are all arranged in the oil tank. A liquid level meter is arranged on the inner wall of the oil tank. According to the scheme, the hydraulic loading efficiency in the shield main bearing damage simulation test is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hydraulic loading, and in particular to a hydraulic system of a shield main bearing damage simulation test bench. Background Art

[0002] In the related technologies, with the development of my country's economy, full-face rock tunnel boring machines (TBMs) have been widely used in tunnel construction such as water conservancy projects, railway transportation, subway projects, oil and gas pipelines, and national defense in my country in recent years. Full-face rock tunnel boring machines have complex operating conditions and harsh service environments, and are characterized by heavy loads and impacts. As the core component of the shield machine, the main bearing of the shield machine plays the role of supporting the shield cutterhead and rotating it to break rocks. It is easy to wear or even break during operation. The main bearing adopts an internal gear three-row roller combined turntable bearing, which bears radial, axial loads and overturning moments, and has a design life of more than 10,000 hours. During the excavation work, several variable frequency drive motors or hydraulic motors each drive a gear, and the gear meshes with the inner gear ring of the bearing to drive the cutterhead to rotate. The working environment of the main bearing of the shield machine is harsh. It usually works under heavy loads, eccentric loads, variable loads and large impact conditions. In actual work, the main bearing of the shield machine is prone to large deformation. Long-term work may cause wear or even breakage of the main bearing and gear pair. The damaged main bearing needs to be lifted out from the shaft excavated above the shield machine and replaced, which is very difficult and will bring immeasurable losses to the shield construction. Therefore, it is necessary to accurately detect the damage of the main bearing. However, in the existing technology, a single loading module is usually used to load different components, which cannot meet the actual needs. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a hydraulic system of a shield main bearing damage simulation test bench.

[0004] According to a first aspect of an embodiment of the present disclosure, a hydraulic system of a shield main bearing damage simulation test bench is provided, comprising an oil tank, an air filter, a radial force loading circuit, an axial force loading circuit, and an overturning moment loading circuit, wherein:

[0005] The air filter is arranged inside the fuel tank;

[0006] The ends of the air filter, radial force loading circuit, axial force loading circuit, and overturning moment loading circuit are all arranged inside the oil tank;

[0007] A liquid level gauge is arranged on the inner wall of the oil tank.

[0008] In some embodiments of the present application, the radial force loading circuit, the axial force loading circuit, and the overturning moment loading circuit all include a loading unit, and the loading unit includes an oil suction filter, a motor, a hydraulic pump, and a cylinder, wherein:

[0009] One end of the oil suction filter is arranged below the liquid level of the oil tank;

[0010] The other end of the oil suction filter is connected to one end of the hydraulic pump;

[0011] The other end of the hydraulic pump is connected to one end of the oil cylinder;

[0012] The hydraulic pump is connected to the motor;

[0013] The other end of the oil cylinder is connected to the oil cylinder.

[0014] In some embodiments of the present application, the loading unit further includes a one-way valve, wherein:

[0015] The one-way valve is connected to the line between the hydraulic cylinder and the oil tank.

[0016] In some embodiments of the present application, the loading unit further includes a reversing valve, wherein:

[0017] A first inlet on one side of the reversing valve is connected to one end of the oil cylinder, and a first outlet on one side of the reversing valve is connected to the other end of the oil cylinder;

[0018] The first inlet at the other side of the reversing valve is connected to an end of the one-way valve close to the oil cylinder.

[0019] In some embodiments of the present application, the loading unit further includes a throttle valve, wherein:

[0020] One end of the throttle valve is connected to the first inlet on the other side of the reversing valve;

[0021] The other end of the throttle valve is communicated with the oil tank through a pipeline.

[0022] In some embodiments of the present application, the loading unit further includes a safety valve, wherein:

[0023] One end of the safety valve is connected to the line between the one-way valve and the reversing valve;

[0024] The other end of the safety valve is connected to the line between the throttle valve and the oil tank.

[0025] In some embodiments of the present application, the loading unit of the overturning moment loading circuit further includes a spare oil cylinder, wherein:

[0026] One end of the reserve oil tank is connected to a first inlet on one side of the reversing valve;

[0027] The other end of the reserve oil tank is connected to the first outlet on one side of the reversing valve.

[0028] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by arranging the air filter inside the fuel tank; the ends of the air filter, the radial force loading circuit, the axial force loading circuit, and the overturning moment loading circuit are all arranged inside the fuel tank; a liquid level gauge is arranged on the inner wall of the fuel tank, and the radial force loading circuit, the axial force loading circuit, and the overturning moment loading circuit are used to load different components separately, thereby meeting the actual needs of the shield main bearing damage simulation test and improving the efficiency of hydraulic loading in the shield main bearing damage simulation test.

[0029] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0031] Figure 1 It is a schematic diagram of the structure of a hydraulic system of a shield main bearing damage simulation test bench according to an exemplary embodiment.

[0032] Reference numerals

[0033] 1-Oil tank; 2-Air filter; 3-Oil suction filter; 4-Motor; 5-Hydraulic pump; 6-Check valve; 7-Safety valve; 8-Throttle valve; 9-Reversing valve; 10-Cylinder; 11-Liquid level gauge; 12-Radial force loading circuit, 13-Axial force loading circuit, 14-Overturning moment loading circuit. DETAILED DESCRIPTION

[0034] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0035] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present disclosure. The singular forms "a", "an" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0036] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the disclosed embodiments, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the disclosed embodiments, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at" or "when" or "in response to determination".

[0037] In addition, various forms of processes shown in the embodiments of the present disclosure may be used to reorder, add or delete steps. For example, the steps described in the present application may be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution disclosed in the present application can be achieved, and this document does not limit this.

[0038] In the related technologies, with the development of my country's economy, full-face rock tunnel boring machines (TBMs) have been widely used in tunnel construction such as water conservancy projects, railway transportation, subway projects, oil and gas pipelines, and national defense in my country in recent years. Full-face rock tunnel boring machines have complex operating conditions and harsh service environments, and are characterized by heavy loads and impacts. As the core component of the shield machine, the main bearing of the shield machine plays the role of supporting the shield cutterhead and rotating it to break rocks. It is easy to wear or even break during operation. The main bearing adopts an internal gear three-row roller combined turntable bearing, which bears radial, axial loads and overturning moments, and has a design life of more than 10,000 hours. During the excavation work, several variable frequency drive motors or hydraulic motors each drive a gear, and the gear meshes with the inner gear ring of the bearing to drive the cutterhead to rotate. The working environment of the main bearing of the shield machine is harsh. It usually works under heavy loads, eccentric loads, variable loads and large impact conditions. In actual work, the main bearing of the shield machine is prone to large deformation. Long-term work may cause wear or even breakage of the main bearing and gear pair. The damaged main bearing needs to be lifted out from the shaft excavated above the shield machine and replaced, which is very difficult and will bring immeasurable losses to the shield construction. Therefore, it is necessary to accurately detect the damage of the main bearing. However, in the existing technology, a single loading module is usually used to load different components, which cannot meet the actual needs.

[0039] In order to solve the above problems, the present invention provides a hydraulic system of a shield main bearing damage simulation test bench, by arranging an air filter inside the oil tank; the ends of the air filter, the radial force loading circuit, the axial force loading circuit, and the overturning moment loading circuit are all arranged inside the oil tank; a liquid level gauge is arranged on the inner wall of the oil tank, and the radial force loading circuit, the axial force loading circuit, and the overturning moment loading circuit are used to load different components separately, thereby meeting the actual needs of the shield main bearing damage simulation test and improving the efficiency of hydraulic loading in the shield main bearing damage simulation test.

[0040] Figure 1 FIG. 1 is a schematic diagram of the hydraulic system structure of a shield main bearing damage simulation test bench according to an exemplary embodiment. Figure 1 As shown, the system may include a fuel tank 1 , an air filter 2 , a radial force loading circuit 12 , an axial force loading circuit 13 , and an overturning moment loading circuit 14 .

[0041] The air filter 2 is arranged inside the fuel tank 1;

[0042] The ends of the air filter 2, the radial force loading circuit 12, the axial force loading circuit 13, and the overturning moment loading circuit 14 are all arranged inside the oil tank 1;

[0043] A liquid level gauge 11 is provided on the inner wall of the oil tank 1 .

[0044] In some embodiments of the present application, the fuel tank 1 can be calculated in the following way:

[0045] Take the length, width and height of fuel tank 1 as 0.5m, 0.4m and 0.2m respectively, and the volume of fuel tank 1 is 40L;

[0046]

[0047] Among them, V is the oil consumption of the cylinder 10, L is the stroke of the cylinder 10, and D is the cylinder diameter of the cylinder 10;

[0048] Calculation shows that the oil consumption of the axial cylinder 10 is 0.61L, the oil consumption of the radial cylinder 10 is 0.25L, and the oil consumption of the overturning moment cylinder 10 (two) is 0.78L, totaling 1.64L.

[0049] In some embodiments of the present application, the radial force loading circuit 12, the axial force loading circuit 13, and the overturning moment loading circuit 14 all include a loading unit, and the loading unit includes an oil suction filter 3, a motor 4, a hydraulic pump 5 and a cylinder 10, wherein: one end of the oil suction filter 3 is arranged below the liquid level of the oil tank 1; the other end of the oil suction filter 3 is connected to one end of the hydraulic pump 5; the other end of the hydraulic pump 5 is connected to one end of the cylinder 10; the hydraulic pump 5 is connected to the motor 4; and the other end of the cylinder 10 is connected to the cylinder 10.

[0050] In some embodiments of the present application, the loading unit further includes a one-way valve 6 , wherein the one-way valve 6 is connected to the line between the hydraulic cylinder and the oil tank 1 .

[0051] In some embodiments of the present application, the loading unit also includes a reversing valve 9, wherein: the first inlet on one side of the reversing valve 9 is connected to one end of the cylinder 10, and the first outlet on one side of the reversing valve 9 is connected to the other end of the cylinder 10; the first inlet on the other side of the reversing valve 9 is connected to the end of the one-way valve 6 close to the cylinder 10.

[0052] In some embodiments of the present application, the loading unit further includes a throttle valve 8, wherein: one end of the throttle valve 8 is connected to the first inlet on the other side of the reversing valve 9; and the other end of the throttle valve 8 is connected to the oil tank 1 through a pipeline.

[0053] In some embodiments of the present application, the loading unit also includes a safety valve 7, wherein: one end of the safety valve 7 is connected to the line between the one-way valve 6 and the reversing valve 9; the other end of the safety valve 7 is connected to the line between the throttle valve 8 and the oil tank 1.

[0054] In some embodiments of the present application, the loading unit of the overturning moment loading circuit 14 also includes a spare oil cylinder 10, wherein: one end of the spare oil tank 1 is connected to the first inlet on one side of the reversing valve 9; the other end of the spare oil tank 1 is connected to the first outlet on one side of the reversing valve 9.

[0055] According to the hydraulic system of the shield main bearing damage simulation test bench proposed in the embodiment of the present application, the air filter is arranged inside the oil tank; the ends of the air filter, the radial force loading circuit, the axial force loading circuit, and the overturning moment loading circuit are all arranged inside the oil tank; a liquid level gauge is arranged on the inner wall of the oil tank, and the radial force loading circuit, the axial force loading circuit, and the overturning moment loading circuit are used to load different components separately, thereby meeting the actual needs of the shield main bearing damage simulation test and improving the efficiency of hydraulic loading in the shield main bearing damage simulation test.

[0056] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed in this disclosure. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0062] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A hydraulic system for a shield main bearing damage simulation test bench, characterized in that: It includes a fuel tank, an air filter, a radial force loading circuit, an axial force loading circuit, and an overturning moment loading circuit, wherein: The air filter is arranged inside the fuel tank; The ends of the air filter, radial force loading circuit, axial force loading circuit, and overturning moment loading circuit are all arranged inside the oil tank; A liquid level gauge is arranged on the inner wall of the oil tank.

2. The hydraulic system of the shield main bearing damage simulation test bench according to claim 1 is characterized in that: The radial force loading circuit, the axial force loading circuit, and the overturning moment loading circuit all include a loading unit, and the loading unit includes an oil suction filter, a motor, a hydraulic pump, and a cylinder, wherein: One end of the oil suction filter is arranged below the liquid level of the oil tank; The other end of the oil suction filter is connected to one end of the hydraulic pump; The other end of the hydraulic pump is connected to one end of the oil cylinder; The hydraulic pump is connected to the motor; The other end of the oil cylinder is connected to the oil cylinder.

3. The hydraulic system of the shield main bearing damage simulation test bench according to claim 2 is characterized in that: The loading unit further comprises a one-way valve, wherein: The one-way valve is connected to the line between the hydraulic cylinder and the oil tank.

4. The hydraulic system of the shield main bearing damage simulation test bench according to claim 3 is characterized in that: The loading unit further comprises a reversing valve, wherein: A first inlet on one side of the reversing valve is connected to one end of the oil cylinder, and a first outlet on one side of the reversing valve is connected to the other end of the oil cylinder; The first inlet at the other side of the reversing valve is connected to an end of the one-way valve close to the oil cylinder.

5. The hydraulic system of the shield main bearing damage simulation test bench according to claim 4 is characterized in that: The loading unit further comprises a throttle valve, wherein: One end of the throttle valve is connected to the first inlet on the other side of the reversing valve; The other end of the throttle valve is communicated with the oil tank through a pipeline.

6. The hydraulic system of the shield main bearing damage simulation test bench according to claim 5 is characterized in that: The loading unit further comprises a safety valve, wherein: One end of the safety valve is connected to the line between the one-way valve and the reversing valve; The other end of the safety valve is connected to the line between the throttle valve and the oil tank.

7. The hydraulic system of the shield main bearing damage simulation test bench according to claim 6 is characterized in that: The loading unit of the overturning moment loading circuit also includes a spare oil cylinder, wherein: One end of the reserve oil tank is connected to a first inlet on one side of the reversing valve; The other end of the reserve oil tank is connected to the first outlet on one side of the reversing valve.

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