Fluid circulation supply device and rolling contact fatigue testing machine

Abstract

The utility model relates to the technical field of lubricating oil supply of a fatigue testing machine, in particular to a fluid circulation supply device and a rolling contact fatigue testing machine, which comprise a circulation pipeline, a fluid supply pipeline, a fluid supply pipeline, a fluid supply pipeline and a fluid supply pipeline, and the circulation pipeline comprises a first pipeline, a second pipeline, a third pipeline and a fourth pipeline; the fluid container is provided with an inlet and an outlet, the fluid container is further provided with a temperature control device, and the inlet is communicated with the output port of the equipment through a first pipeline; an input port of the circulating pump is communicated with the outlet through a second pipeline, an output port of the circulating pump is provided with a multi-way pipe, the multi-way pipe is at least provided with a first connector, a second connector and a third connector, the output port of the circulating pump is communicated with the first connector, the second connector is led into the equipment through a third pipeline, and the third connector is communicated with the inlet through a fourth pipeline; and the third pipeline and the fourth pipeline are respectively provided with a flow control device. The fluid circulation supply device can supply high-temperature lubricating oil to the rolling contact fatigue testing machine.

Description

Technical Field

[0001] The utility model relates to the technical field of lubricating oil supply of a fatigue testing machine, in particular to a fluid circulation supply device and a rolling contact fatigue testing machine. Background Art

[0002] With the rapid development of aviation, aerospace, machinery manufacturing and automobile industries, transmission parts are required to adapt to harsh working conditions such as high temperature, high pressure, high speed, heavy load and corrosive media. Seeking to solve the problem of early surface damage caused by direct contact of friction pairs or lubrication failure under harsh conditions such as high temperature has become the focus of domestic and foreign scholars in this field. High-temperature lubricating oil circulation devices provide a new way to solve the problem.

[0003] Fatigue testing machine is a machine mainly used to test the fatigue properties of metals and their alloy materials under tension, compression or tension-compression alternating loads at room temperature.

[0004] At present, there are many types of test benches used to detect rolling contact fatigue performance at home and abroad, including ball-on-disk testers, three-point contact testers, ball-column testers, and roller contact testers. The contact methods of the remaining categories are all point contact. Taking the LEROS (Leicester University Rolling Slide) tester, which is currently the most widely used and developed by Garnham and Beynon of the University of Leicester, as an example, it consists of a main shaft drive mechanism, a test shaft drive mechanism, a hydraulic loading mechanism, and an information acquisition and control system. When it is working, the testing machine drives the spindle gearbox through the spindle DC motor, and the spindle gearbox drives the spindle and drives the bottom main specimen to rotate. The spindle is supported by the bearing box, and a hydraulic loading mechanism is set at the bottom of the bearing box: the lathe gearbox is driven by the test shaft AC motor, and the output end of the lathe gearbox drives the test shaft and drives the top test specimen to rotate. The test shaft AC motor also plays a "braking" role, that is, the slip rate can be adjusted by adjusting the speed of the top test specimen: the spindle DC motor is usually a 4kW DC motor controlled by a thyristor: the loading process of the hydraulic loading mechanism is: the water-cooled hydraulic power device pushes the hydraulic loading piston through two different valves to make it rotate around the bearing box, so that the spindle drives the main specimen and applies vertical upward pressure to the upper test specimen: the information acquisition and control system mainly includes computers and torque sensors The test machine is equipped with a test device, an eddy current testing device, a probe scanner, a speed sensor, a speed counter, a hydraulic pressure sensor and other components. The torque sensor is arranged on the test shaft to detect the torque of the test shaft. The speed sensor and the speed counter are used to detect the speeds of the main shaft and the test shaft. The hydraulic pressure sensor is used to detect the load applied to the sample by the hydraulic loading mechanism. The eddy current testing device and the probe scanner are used to detect the resistance fatigue cracks of the sample. The signals detected by the torque sensor, the eddy current testing device, the probe scanner, the speed sensor, the speed counter, the hydraulic pressure sensor and other components are input into the control panel. When the real-time test force, slip rate and speed of the sample deviate from the set value, the computer can accurately control them through a converter: when the crack length exceeds the maximum value set by the user, the testing machine automatically stops.

[0005] The rolling contact fatigue testing machines currently available in the industry are roughly divided into point contact and line contact types according to the contact type, and are roughly divided into disc type and roller type according to the machine layout characteristics. In most rolling contact fatigue tests, the tested parts and accompanying test parts are in a rotating state. For example, when the rolling contact specimen (referred to as the specimen) is a high-performance gear or bearing, the high-performance gear or bearing will experience a temperature increase under high load and high speed conditions. In order to reproduce the process of the rolling contact specimen in high-temperature service conditions and keep the specimen surface in a high-temperature state, a device that can circulate high-temperature lubricating oil to the rolling contact specimen is required. Utility Model Content

[0006] The utility model aims to provide a fluid circulation supply device, which can circulate and supply high-temperature lubricating oil to a rolling contact fatigue testing machine.

[0007] Another object of the utility model is to provide a rolling contact fatigue testing machine, which can circulate and supply high-temperature lubricating oil into the machine body through a fluid circulation supply device.

[0008] The technical solution of the utility model is achieved in this way:

[0009] A fluid circulation supply device, used for circulating fluid to equipment, comprising:

[0010] A circulation pipeline, comprising a first pipeline, a second pipeline, a third pipeline and a fourth pipeline;

[0011] A fluid container, wherein the fluid container is provided with an inlet and an outlet, and the fluid container is also provided with a temperature control device, and the inlet is connected to the output port of the device through the first pipeline;

[0012] A circulation pump, wherein the input port of the circulation pump is connected to the outlet through the second pipeline, and a multi-way pipe is arranged at the output port of the circulation pump, and the multi-way pipe has at least a first interface, a second interface and a third interface, wherein the output port of the circulation pump is connected to the first interface, the second interface leads to the inside of the equipment through the third pipeline, the third interface is connected to the inlet through the fourth pipeline, and the third pipeline and the fourth pipeline are respectively provided with flow control devices.

[0013] Furthermore, the fluid is lubricating oil, the fluid container is an oil tank, and the equipment is a rolling contact fatigue testing machine.

[0014] Furthermore, the flow control device adopts a flow regulating valve.

[0015] Furthermore, the temperature control device includes a temperature measuring unit and a heating unit, the heating unit is used to heat the fluid in the fluid container, and the temperature measuring unit is used to detect the temperature of the fluid in the fluid container.

[0016] Furthermore, it also includes a control system, and the circulation pump, the flow control device and the temperature control device are electrically connected to the control system respectively.

[0017] Furthermore, the control system adopts a control box, and the control box is provided with a thyristor, a frequency converter and an AC contactor;

[0018] Wherein, the AC contactor is used to control the main power switch, the thyristor is electrically connected to the temperature measuring unit, and a motor switch is arranged between the frequency converter and the circulating pump.

[0019] Furthermore, the control box is also provided with a tachometer, a temperature control meter and a button switch;

[0020] Among them, the tachometer is used to detect and display the rotation speed of the rolling contact sample; the temperature control meter is electrically connected to the temperature measuring unit and is used to display the temperature detected by the temperature measuring unit; the button switch is used to control the opening and closing of the control box.

[0021] Furthermore, the multi-way pipe is a three-way pipe.

[0022] A rolling contact fatigue testing machine includes a testing machine body and a fluid circulation supply device, one end of the third pipeline is connected to the second interface, and the other end leads to the rolling contact specimen in the testing machine body, the fluid output port of the testing machine body is connected to the inlet of the fluid container through a first pipeline, and the fluid circulation supply device is used to circulate high-temperature lubricating oil to the rolling contact specimen in the testing machine body.

[0023] Furthermore, a protective cover is provided outside the testing machine body.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] The present application provides a fluid circulation supply device, and the fluid in the fluid container can be lubricating oil. Specifically, the temperature of the lubricating oil in the fluid container can be controlled by a temperature control device, and the lubricating oil can be heated to a suitable temperature to form high-temperature lubricating oil. The high-temperature lubricating oil is extracted into the fluid container by a circulating pump and provided to a sample in a fatigue testing machine. In addition, since the temperature control device can control the temperature of the high-temperature lubricating oil to achieve a heat preservation effect, the fatigue testing machine can be better supplied with high-temperature lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the structure of the fluid circulation supply device of the utility model;

[0028] Figure 2 It is a structural schematic diagram of the control box of the utility model.

[0029] In the figure:

[0030] 1- oil tank; 101- oil drain nozzle; 102- connecting vessel;

[0031] 2-heating rod; 3-thermocouple; 4-circulation pump;

[0032] 5- tee pipe; 6- first pipeline; 7- second pipeline;

[0033] 8-third pipeline; 9-fourth pipeline; 10-flow regulating valve;

[0034] 11- pump body bracket; 12- oil tank bracket; 13- control box;

[0035] 1301-tachometer; 1302-temperature controller; 1303-button switch. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0043] Example 1

[0044] Reference Figure 1-Figure 2 This embodiment provides a fluid circulation supply device for cyclically supplying fluid to a device, comprising:

[0045] A circulation pipeline, comprising a first pipeline 6, a second pipeline 7, a third pipeline 8 and a fourth pipeline 9;

[0046] A fluid container, wherein the fluid container is provided with an inlet and an outlet, and a temperature control device is also provided on the fluid container, and the inlet is connected to the output port of the device through the first pipeline 6;

[0047] A circulation pump 4, wherein the input port of the circulation pump 4 is connected to the output port through the second pipeline 7, and a multi-way pipe is provided at the output port of the circulation pump 4, and the multi-way pipe has at least a first interface, a second interface and a third interface. Preferably, the multi-way pipe is a three-way pipe 5, and the three-way pipe 5 has a first interface, a second interface and a third interface. The output port of the circulation pump 4 is connected to the first interface, and the second interface leads to the inside of the device through the third pipeline 8, and is used to supply fluid to the device; the third interface is connected to the inlet through the fourth pipeline 9, and the third pipeline 8 and the fourth pipeline 9 are respectively provided with flow control devices. The fourth pipeline 9 is essentially an overflow pipe. When the circulation pump 4 supplies fluid to the device, in order to prevent overflow, the fluid is diverted from the fourth pipeline 9 and flows back to the fluid container.

[0048] The circulation pump 4 comprises a pump body and a motor for driving the pump body.

[0049] The inlet branch on the fluid container has two branch inlets, one of which is connected to the circulation pump 4 through the fourth pipeline 9, and the other is connected to the fluid output port of the device through the first pipeline 6; or, two inlets are arranged on the fluid container, namely the first inlet and the second inlet, wherein the first inlet is connected to the circulation pump 4 through the fourth pipeline 9, and the second inlet is connected to the fluid output port of the device through the first pipeline 6.

[0050] Fluids include gases or liquids, such as refrigerants, water, lubricants, etc.

[0051] In this embodiment, the fluid delivered by the circulating pump 4 is lubricating oil, the fluid container is the oil tank 1, the equipment is a rolling contact fatigue testing machine, and the fluid circulation supply device is used to provide high-temperature lubricating oil for the rolling contact specimen circulation in the rolling contact fatigue testing machine.

[0052] The bottom of the oil tank 1 is also provided with an oil drain nozzle 101 to facilitate the discharge of the lubricating oil in the oil tank 1 .

[0053] A nozzle is also provided at one end of the third pipeline 8 leading to the rolling contact specimen. When the circulating pump 4 is started, the high-temperature lubricating oil can be circulated or sprayed to the rolling contact specimen in the rolling contact fatigue testing machine. The spraying of high-temperature lubricating oil is designed according to the service conditions of the component (specimen). For example, when the rolling contact specimen is a high-performance gear or bearing, the high-performance gear or bearing will have a temperature rise phenomenon under high load and high speed. In order to reproduce the high-temperature service process, the fluid circulation supply device is designed to circulate and spray high-temperature lubricating oil to the specimen during the test, so that the surface of the specimen is always in a high-temperature state.

[0054] Specifically, the flow control device adopts an electrically controlled flow regulating valve 10, which is also called a self-balancing valve, a flow control valve, a flow controller, a dynamic balancing valve, or a flow balancing valve, and is an intuitive and simple flow regulating control device.

[0055] In this embodiment, the temperature control device includes a temperature measuring unit and a heating unit, wherein the heating unit is used to heat the fluid in the fluid container, and the temperature measuring unit is used to detect the temperature of the fluid in the fluid container. The heating unit uses a heating rod 2, which is arranged on the top of the oil tank 1, and the heating rod 2 is passed through the top plate of the oil tank 1. One end of the heating rod 2 is not fixed and is located outside the oil tank 1, and the other end of the heating rod 2 is a heating end located in the oil tank 1 and in contact with the lubricating oil, and is used to heat the lubricating oil, and can heat the lubricating oil to 300°C.

[0056] The temperature measuring unit can use thermocouple 3, which is a temperature sensor that uses the thermoelectric effect to measure temperature. When two different conductors form a closed loop, if the temperatures at the two ends are not equal, a thermoelectric potential will be generated in the loop. This phenomenon is called the thermoelectric effect. Thermocouple 3 uses this effect to work. The basic structure of thermocouple 3 usually consists of main parts such as thermoelectrode, insulating sleeve protection tube and junction box. It directly measures the temperature and converts the temperature signal into a thermoelectric potential signal, which is converted into the temperature of the measured medium through electrical instruments. Thermocouple 3 is widely used in temperature control systems, heat treatment furnaces and medical equipment, and has the advantages of wide range, high sensitivity and strong durability. The working principle of thermocouple 3 is based on contact potential and temperature difference potential. Contact potential is generated when two different conductors are in contact, while temperature difference potential is generated when the temperatures at both ends of the same conductor are different. These two potentials work together in the thermocouple 3 loop to generate an electromotive force proportional to the temperature, which is called thermoelectric potential. In the present application, the temperature of the lubricating oil is measured by the thermocouple 3, and the data information of the oil temperature is transmitted to the control system.

[0057] The control system is a control box 13 , and the motor of the circulation pump 4 , the flow regulating valve 10 , the heating rod 2 , and the thermocouple 3 are electrically connected to the control box 13 respectively.

[0058] The control box 13 is provided with a thyristor, a frequency converter and an AC contactor; it should be noted that the frequency converter is a power control device that controls the operation of the AC motor by applying frequency conversion technology and microelectronic technology to change the frequency of the motor's working power supply. Thyristor, thyristor is the abbreviation of thyristor rectifier element, its function is not only rectification, but also can be used as a contactless switch to quickly connect or disconnect the circuit, realize the inversion of direct current into alternating current, and convert one frequency of alternating current into another frequency of alternating current, etc.

[0059] The AC contactor is used to control the main power switch, the thyristor is electrically connected to the temperature measuring unit, and the AC contactor controls the main power switch and is responsible for supplying power to the thyristor and the frequency converter. A motor switch is provided between the frequency converter and the circulating pump 4, that is, the frequency converter can change the working power frequency of the motor of the circulating pump 4 to control its operation. The motor switch is used to control the opening and closing of the circulating pump 4.

[0060] The control box 13 is also provided with a tachometer 1301, a temperature control meter 1302 and a button switch 1303;

[0061] The tachometer 1301 is used to detect and display the rotation speed of the rolling contact specimen; specifically, the tachometer 1301 includes a tachometer body and a contact end for measuring the rotation speed of an object, the contact end contacts the rolling contact specimen and measures its rotation speed, the tachometer body has a display screen for displaying the measured rotation speed, the temperature controller 1302 is electrically connected to the temperature measuring unit (heating rod 2), and is used to display the temperature detected by the temperature measuring unit, that is, the temperature controller 1302 is connected to the thermocouple 3, and sends a control signal to the thyristor. The temperature controller 1302 has two communication lines connected to the computer and software communication respectively, the total power supply is three fires and one zero, the heating rod 2 and the frequency converter use three-phase electricity, and the temperature controller 1302 uses single-phase electricity. The button switch 1303 is used to control the opening and closing of the control box 13, that is, to control the electrical connection between the control box 13 and the total power supply.

[0062] A socket is also provided on the control box 13 and located outside the control box 13, which is responsible for supplying power to the entire device and can also conveniently supply power to other electrical appliances.

[0063] In this embodiment, a pump body bracket 11 is arranged at the bottom of the circulating pump 4, an oil tank bracket 12 is arranged at the bottom of the oil tank 1, and a connecting vessel 102 is also arranged on the side of the oil tank 1. The connecting vessel 102 is arranged to observe the liquid level of the lubricating oil in the oil tank 1.

[0064] Example 2

[0065] A rolling contact fatigue testing machine includes a testing machine body and a fluid circulation supply device. The lubricating oil input port of the testing machine body is connected to the second interface of the tee pipe 5 through a third pipeline 8, and the lubricating oil output port of the testing machine body is connected to the inlet of the fluid container through a first pipeline 6. The fluid circulation supply device is used to circulate high-temperature lubricating oil to the rolling contact specimen in the testing machine body.

[0066] A protective cover is also provided on the outside of the testing machine body to prevent the high-temperature lubricating oil from splashing when the fluid circulation supply device sprays the high-temperature lubricating oil and causing harm to surrounding personnel.

[0067] The beneficial effects of the technical solution of the utility model are:

[0068] The present application provides a fluid circulation supply device, which can extract high-temperature lubricating oil into a fluid container through a circulation pump 4, and then provide the high-temperature lubricating oil to a rolling contact specimen in a rolling contact fatigue testing machine. Specifically, the temperature of the lubricating oil in the fluid container can be controlled by a temperature control device, and the lubricating oil can be heated to a suitable temperature to form a high-temperature lubricating oil. Moreover, since the temperature control device can control the temperature of the high-temperature lubricating oil to achieve a heat preservation effect, the high-temperature lubricating oil can be better supplied to the specimen in the fatigue testing machine. Moreover, the overall structure is simple and easy to manufacture and produce.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

[0070] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A fluid circulation supply device for circulating fluid to equipment, characterized in that: include: A circulation pipeline, comprising a first pipeline (6), a second pipeline (7), a third pipeline (8) and a fourth pipeline (9); A fluid container, wherein the fluid container is provided with an inlet and an outlet, and the fluid container is also provided with a temperature control device, and the inlet is connected to the output port of the device through the first pipeline (6); A circulation pump (4), wherein the input port of the circulation pump (4) is connected to the output port through the second pipeline (7), and a multi-way pipe is arranged at the output port of the circulation pump (4), and the multi-way pipe has at least a first interface, a second interface and a third interface, wherein the output port of the circulation pump (4) is connected to the first interface, the second interface leads to the inside of the device through the third pipeline (8), and the third interface is connected to the inlet through the fourth pipeline (9), and the third pipeline (8) and the fourth pipeline (9) are respectively provided with flow control devices.

2. The fluid circulation supply device according to claim 1, characterized in that: The fluid is lubricating oil, the fluid container is an oil tank (1), and the equipment is a rolling contact fatigue testing machine.

3. The fluid circulation supply device according to claim 1, characterized in that: The flow control device adopts a flow regulating valve (10).

4. The fluid circulation supply device according to claim 1, characterized in that: The temperature control device comprises a temperature measuring unit and a heating unit. The heating unit is used to heat the fluid in the fluid container, and the temperature measuring unit is used to detect the temperature of the fluid in the fluid container.

5. The fluid circulation supply device according to claim 4, characterized in that: It also comprises a control system, wherein the circulation pump (4), the flow control device and the temperature control device are electrically connected to the control system respectively.

6. The fluid circulation supply device according to claim 5, characterized in that: The control system adopts a control box (13), and the control box (13) is provided with a thyristor, a frequency converter and an AC contactor; The AC contactor is used to control the main power switch, the thyristor is electrically connected to the temperature measuring unit, and a motor switch is provided between the frequency converter and the circulation pump (4).

7. The fluid circulation supply device according to claim 6, characterized in that: The control box (13) is also provided with a tachometer (1301), a temperature control meter (1302) and a button switch (1303); The tachometer (1301) is used to detect and display the rotation speed of the rolling contact sample; the temperature control meter (1302) is electrically connected to the temperature measuring unit and is used to display the temperature detected by the temperature measuring unit; and the button switch (1303) is used to control the opening and closing of the control box (13).

8. The fluid circulation supply device according to claim 1, characterized in that: The multi-way pipe is a three-way pipe (5).

9. A rolling contact fatigue testing machine, comprising a testing machine body, characterized in that: It also includes a fluid circulation supply device as described in any one of claims 1 to 8, one end of the third pipeline (8) is connected to the second interface, and the other end leads to the rolling contact specimen in the testing machine body, and the fluid output port of the testing machine body is connected to the inlet of the fluid container through the first pipeline (6), and the fluid circulation supply device is used to circulate high-temperature lubricating oil to the rolling contact specimen in the testing machine body.

10. The rolling contact fatigue testing machine according to claim 9, characterized in that: A protective cover is also arranged outside the testing machine body.

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