Experimental device for testing rotation performance of deepwater hydraulic walking motor

Abstract

The invention discloses an experimental device for testing the rotation performance of a deepwater hydraulic travel motor. The experimental device comprises a compensation cover, a first compensation diaphragm, a sealing cylinder, a power supply core watertight connecting piece, a nut, a screw rod, an O-shaped ring, an end cover, a plug, a motor fixing frame, a motor, a pump and a hydraulic motor, the exterior of the high-pressure water tank supplies power to the motor, the motor drives the pump to move, the pump achieves an oil supply loop for the hydraulic motor through a pipeline by means of hydraulic oil in the sealing cylinder, and then the hydraulic motor is driven to rotate. According to the invention, the rotary motion of the hydraulic motor under 6000.60 m MPa can be realized, and the rotation characteristic and the sealing performance of the motor can be tested; the invention provides an experimental test method for the development of domestic deep-water motors and improves the development level of deep-water hydraulic pressure in China.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor testing, and particularly relates to a rotational performance test experimental device for a deep-water hydraulic walking motor. Background Art

[0002] Crawler-type deep-sea mining vehicles have large tractive force and low ground pressure, and are widely used in the development of deep-sea mining equipment. Among them, the quality of the underwater traveling system is a crucial key to whether the deep-sea mining vehicle can travel safely and smoothly. Among them, most mining vehicles use hydraulic-driven deep-water motors in the design of the traveling mechanism.

[0003] In some occasions with harsh environments and complex conditions, such as the deep sea and mines, hydraulic walking motors can better adapt to these special working conditions due to their strong anti-pollution ability and stable operation in harsh environments such as high temperature and high pressure. In contrast, electric motors may face problems such as insulation and heat dissipation in such environments, and their reliability will be affected. For some equipment that requires high torque and high power output, such as large construction machinery and ships, hydraulic walking motors can easily achieve high torque output by adjusting the pressure and flow rate of the hydraulic system, meeting the power requirements of the equipment. While electric motors of the same power may be bulky, costly, and inferior to hydraulic walking motors in terms of starting and overload capabilities. At the same time, in terms of motion control accuracy, hydraulic walking motors can cooperate with hydraulic control systems to achieve high-precision position control, speed control, and force control. By components such as hydraulic proportional valves and servo valves, the flow rate and pressure of hydraulic oil can be precisely adjusted, thereby precisely controlling the rotation speed and torque of the motor, which is particularly important in some occasions where electric motors are difficult to meet the high-precision control requirements. There are no test methods and technical descriptions of deep-water hydraulic motors in domestic and foreign literature and public patents; the test methods are the same as those of land motors and need to be further improved. Summary of the Invention

[0004] The present invention provides a rotational performance test experimental device for a deep-water hydraulic walking motor, which can solve the problems existing in the prior art.

[0005] To solve the above problems, the technical solutions provided by the present invention are as follows:

[0006] An embodiment of the present invention provides a rotational performance test experimental device for a deep-water hydraulic walking motor, including a compensation cover (1), a first compensation diaphragm (2), a sealing cylinder (4), a power core watertight connector (5), a nut (6), a lead screw (7), an O-ring (9), an end cover (10), a plug (12), a motor fixing bracket (14), a motor (16), a pump (17), and a hydraulic motor (18);

[0007] The motor (16) and the pump (17) are installed inside the sealing cylinder (4). The motor (16) and the pump (17) are connected by a nut (6) and a lead screw (7). Outside the sealing cylinder (4) is a high-pressure water chamber. The hydraulic motor (18) is located inside the high-pressure water chamber, and the hydraulic motor (18) is connected to the sealing cylinder (4) through a motor fixing bracket (14). The external power supply of the high-pressure water chamber supplies power to the motor (16) through a cable. The motor (16) drives the pump (17) to work. The pump (17) uses the hydraulic oil inside the sealing cylinder (4) to supply oil to the hydraulic motor (18) through a hydraulic pipeline, thereby driving the hydraulic motor (18) to rotate in a high-pressure environment.

[0008] The left end of the sealing cylinder (4) is connected with the first compensation diaphragm (2). The outside of the first compensation diaphragm (2) is attached to the compensation cover (1). On both sides of the left side surface of the sealing cylinder (4), a power core watertight connector (5) and a plug (12) are respectively arranged. O-rings (9) are arranged on both side surfaces of the right side of the sealing cylinder (4).

[0009] In a preferred embodiment of the present invention, the first compensation diaphragm (2) and the compensation cover (1) are connected to the left side surface of the sealing cylinder (4) through a first screw (3). The first compensation diaphragm (2) is used to provide a compensation volume of 1.5 L to achieve the dynamic balance between the hydraulic oil inside the sealing cylinder (4) and the external pressure environment. When the external pressure is sensed, the leather bag of the first compensation diaphragm (2) contracts, and the pressure of the internal hydraulic oil gradually increases to the external pressure state under the condition of decreasing volume, thereby achieving the internal and external pressure balance.

[0010] In a preferred embodiment of the present invention, the high-pressure water chamber outside the sealing cylinder (4) is pressurized by an external mechanism to increase the water pressure, achieving a pressure of 0 - 6000 meters, which is consistent with the internal water pressure in seawater.

[0011] In a preferred embodiment of the present invention, the sealing cylinder (4) is filled with hydraulic oil.

[0012] In a preferred embodiment of the present invention, the O-ring (9) is connected to the right side surface of the sealing cylinder (4) through a second screw (8).

[0013] In a preferred embodiment of the present invention, the motor fixing bracket (14) is connected to the sealing cylinder (4) through a third screw (13).

[0014] In a preferred embodiment of the present invention, the pump (17) is connected to the hydraulic motor (18) through a clamping socket (11) to transport hydraulic oil.

[0015] In a preferred embodiment of the present invention, a protruding second compensation diaphragm (15) is arranged at the right end of the hydraulic motor (18).

[0016] Beneficial effects: The embodiment of the present invention provides a rotational performance test experimental device for a deep-water hydraulic walking motor, including a compensation cover, a first compensation diaphragm, a sealing cylinder, a power core watertight connector, a nut, a lead screw, an O-ring, an end cover, a plug, a motor fixing bracket, a motor, a pump, and a hydraulic motor; The motor is powered externally by a high-pressure water tank, the motor drives the movement of the pump, and the pump uses the hydraulic oil inside the sealing cylinder to supply oil to the hydraulic motor through a pipeline, thereby driving the rotation of the hydraulic motor; The present invention can achieve the rotational movement of the hydraulic motor at 6000 meters and 60 MPa, and can test the rotational characteristics and sealing performance of the motor; The present invention provides an experimental test method for the development of domestic deep-water motors, improving the domestic deep-water hydraulic research level. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a cross-sectional schematic diagram of a rotational performance test experimental device for a deep-water hydraulic walking motor provided by an embodiment of the present application.

[0019] Figure 2 is Figure 1 a partially enlarged schematic diagram.

[0020] Figure 3 and Figure 4 It is a three-dimensional physical diagram of a rotational performance test experimental device for a deep-water hydraulic walking motor provided by an embodiment of the present application.

[0021] Figure 5 It is a physical diagram of the sealing cylinder of a rotational performance test experimental device for a deep-water hydraulic walking motor provided by an embodiment of the present application.

[0022] Figure 6 It is a physical diagram of the motor connecting wire of a rotational performance test experimental device for a deep-water hydraulic walking motor provided by an embodiment of the present application. Detailed Embodiments

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application. When referring to the "upper", "lower", "front", "rear", "left", "right", etc. used for the installation position or direction of the structure or components in this embodiment, they are based on the orientation of the given drawings. They are only for convenience of description to distinguish the relative positions of various components or directions, and do not represent the orientation when the device or components in this embodiment are in use.

[0024] The development of a large-depth hydraulic walking motor provides important support for the walking stability of the traveling system of a deep-sea mining vehicle. Structure of the hydraulic motor The hydraulic walking motor is mainly composed of the following functional structures: housing, rotor, stator, plunger, output shaft, bearing, seal, planetary reducer, etc. The housing serves as the main structure and external protection of the motor. Different chambers are separated inside to accommodate internal parts and withstand the pressure of the hydraulic system, ensuring that the hydraulic oil flows along the specified path inside, and at the same time connecting to the external hydraulic pipeline to provide a channel for the inlet and outlet of the hydraulic oil. The rotor is the rotating part of the motor, connected to the output shaft, and generates a rotational movement under the action of the hydraulic oil, converting hydraulic energy into mechanical energy and outputting power. The stator is usually fixed and surrounds the rotor. Special chambers, channels or curved tracks are designed inside it to guide the hydraulic oil to act on components such as blades and plungers on the rotor in a specific manner, enabling the rotor to rotate stably according to the design requirements. In a plunger-type hydraulic walking motor, the plunger reciprocates in the plunger hole of the cylinder block, converting the pressure energy of the hydraulic oil into mechanical energy and driving the rotor to rotate. The output shaft is the component that connects the hydraulic walking motor to the external load, transmitting the rotational movement of the rotor to the external traveling mechanism or other working components, outputting power to drive the equipment to travel or complete other work tasks. Connecting structures such as keys and splines are usually installed on the output shaft to ensure reliable connection with external components. Bearings are used to support the rotor and the output shaft, enabling them to rotate smoothly inside the housing, reducing friction and wear during rotation, withstanding the radial and axial forces generated by the rotor and the output shaft during rotation, and ensuring the rotational accuracy and stability of the motor. Seals are used to prevent the leakage of hydraulic oil from the inside of the motor to the outside, and to prevent external impurities, air, etc. from entering the inside of the motor, ensuring the sealing performance and working efficiency of the hydraulic system. Common seals include O-rings, oil seals, gaskets, etc. Planetary reducer To meet the working requirements of low speed and high torque, the walking motor of a deep-sea mining vehicle is equipped with a planetary reducer, which converts the high-speed and low-torque output of the motor into a low-speed and high-torque output to better drive the traveling mechanism.

[0025] Different from land, there are many differences between the performance test of deep - sea hydraulic motors and that of land hydraulic motors in terms of test environment, test parameters, test equipment, and test safety, as follows: Test environment: Deep - sea hydraulic motors need to be tested in a test chamber that simulates the deep - sea environment or in the actual deep - sea environment. The test chamber should be able to simulate the characteristics of high pressure, low temperature, and corrosiveness in the deep sea; the test of land hydraulic motors is usually carried out in a laboratory or on - site land environment, where the environmental conditions are relatively stable and controllable, without problems such as high pressure and seawater corrosion, and the installation and debugging of test equipment are more convenient. Test parameters: (1) Pressure parameters: Deep - sea hydraulic motors: It is necessary to focus on their performance under the high pressure of the deep sea. It is necessary to test the changes in parameters such as the volumetric efficiency, mechanical efficiency, output torque, and rotational speed of the hydraulic motor under the high pressure corresponding to different depths, and whether it can withstand the high pressure of the deep sea without leakage, deformation, and other failures. Land hydraulic motors mainly consider their performance under normal working pressure. Generally, the working pressure is relatively low, and the pressure change range is relatively narrow, without the need to simulate the ultra - high - pressure environment like the deep sea. (2) Temperature parameters: The deep - sea environment where deep - sea hydraulic motors are located has a low temperature and changes with depth. In the performance test, it is necessary to simulate the low - temperature environment at different depths, and detect the starting performance of the hydraulic motor at low temperature, the influence of changes in oil viscosity on performance, and the low - temperature adaptability of seals, etc. In the test of land hydraulic motors, the environmental temperature is relatively high and the change range is relatively small. It mainly focuses on the heat dissipation performance of the hydraulic motor within the normal working temperature range and the influence of temperature on the performance of oil and components. (3) Corrosion - resistance parameters: Since deep - sea hydraulic motors are in a seawater environment, it is necessary to test their ability to resist seawater corrosion, including the corrosion of the shell, internal parts, etc. after long - term contact with seawater, and the influence of corrosion on the performance of the motor. Land hydraulic motors generally do not have the problem of seawater corrosion, and mainly consider the anti - rust ability in the conventional atmospheric environment and working medium.

[0026] In addition to conventional hydraulic test equipment, deep - sea hydraulic motors also require special deep - sea simulation test chambers or underwater test platforms. The test chamber should have the function of simulating deep - sea environments such as high pressure and low temperature. The underwater test platform needs to be equipped with devices such as underwater positioning, data transmission, and recovery to ensure the smooth progress of the test and the accurate acquisition of data. Conventional hydraulic test benches can be used for land hydraulic motors, mainly including equipment such as oil pumps, fuel tanks, flow meters, pressure gauges, torque sensors, and rotational speed sensors. Through these devices, various performance parameters of the hydraulic motor can be easily measured and adjusted.

[0027] Specifically, such as Figures 1-6As shown in the figure, an experimental device for testing the rotational performance of a deep - water hydraulic walking motor provided by an embodiment of the present invention includes a compensation cover 1, a first compensation diaphragm 2, a sealing cylinder 4, a power core watertight connector 5, a nut 6, a lead screw 7, an O - ring 9, an end cover 10, a plug 12, a motor fixing bracket 14, a motor 16, a pump 17, and a hydraulic motor 18. The motor 16 and the pump 17 are installed inside the sealing cylinder 4, and the motor 16 and the pump 17 are connected by the nut 6 and the lead screw 7; outside the sealing cylinder 4 is a high - pressure water chamber, the hydraulic motor 18 is located inside the high - pressure water chamber, and the hydraulic motor 18 is connected to the sealing cylinder 4 through the motor fixing bracket 14. The external power supply of the high - pressure water chamber supplies power to the motor 16 through a cable. The motor 16 drives the operation of the pump 17, and the pump 17 uses the hydraulic oil inside the sealing cylinder 4 to supply oil to the hydraulic motor 18 through a hydraulic pipeline to form an oil supply circuit, thereby driving the hydraulic motor 18 to rotate in a high - pressure environment. A first compensation diaphragm 2 is connected to the left - hand end of the sealing cylinder 4, the outside of the first compensation diaphragm 2 is fitted with a compensation cover 1, and a power core watertight connector 5 and a plug 12 are respectively arranged on both sides of the left - hand side of the sealing cylinder 4; O - rings 9 are arranged on both sides of the right - hand side of the sealing cylinder 4.

[0028] Figure 2 Combined with Figure 1 , the first compensation diaphragm 2 and the compensation cover 1 are connected to the left - hand side of the sealing cylinder 4 through a first screw 3; the first compensation diaphragm 2 is used to provide a compensation volume of 1.5 L to achieve the dynamic balance between the hydraulic oil inside the sealing cylinder 4 and the external pressure environment; when sensing the external pressure, the leather bag of the first compensation diaphragm 2 shrinks, and the pressure of the internal hydraulic oil gradually increases to the external pressure state under the condition of volume reduction, thereby achieving the internal and external pressure balance.

[0029] The high - pressure water chamber outside the sealing cylinder 4 increases the water pressure through external mechanism pressurization to achieve a pressure of 0 - 6000 m, which is consistent with the internal water pressure in the sea water. The sealing cylinder 4 is filled with hydraulic oil, and the pump 17 and the sealing cylinder 4 are connected by a hydraulic pipeline. The O - ring 9 is connected to the right - hand side of the sealing cylinder 4 through a second screw 8. The motor fixing bracket 14 is connected to the sealing cylinder 4 through a third screw 13. The pump 17 is connected to the hydraulic motor 18 through a clamping socket 11 to transport hydraulic oil. A convex second compensation diaphragm 15 is arranged at the right - hand end of the hydraulic motor 18 to achieve the dynamic balance between the gear oil of the hydraulic motor 18 and the external pressure.

[0030] The external part of the high - pressure water chamber supplies power to the motor, the motor drives the movement of the pump, and the pump uses the hydraulic oil inside the sealing cylinder to supply oil to the hydraulic motor through a pipeline to form an oil supply circuit, thereby driving the rotation of the hydraulic motor. The present invention can achieve the rotational movement of the hydraulic motor at 6000 m and 60 MPa, and can test the rotational characteristics and sealing performance of the motor. The present invention provides an experimental test method for the development of domestic deep - water motors and improves the domestic deep - water hydraulic research level.

[0031] Although the present invention has been disclosed above in preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those of ordinary skill in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A deepwater hydraulic travel motor rotation performance test device, characterized in that: It comprises a compensation cover (1), a first compensation diaphragm (2), a sealing cylinder (4), a power core watertight connector (5), a nut (6), a screw rod (7), an O-ring (9), an end cover (10), a plug (12), a motor fixing frame (14), a motor (16), a pump (17) and a hydraulic motor (18); The motor (16) and the pump (17) are installed in the sealing cylinder (4), and the motor (16) and the pump (17) are connected via a nut (6) and a screw rod (7); the outside of the sealing cylinder (4) is a high-pressure water tank, the hydraulic motor (18) is located in the high-pressure water tank, and the hydraulic motor (18) is connected to the sealing cylinder (4) via a motor fixing frame (14); the power supply outside the high-pressure water tank supplies power to the motor (16) via a cable, the motor (16) drives the pump (17) to work, and the pump (17) uses the hydraulic oil inside the sealing cylinder (4) to realize an oil supply circuit for the hydraulic motor (18) through a hydraulic pipeline, thereby driving the hydraulic motor (18) to rotate under a high-pressure environment; The left end of the sealing cylinder (4) is connected to the first compensation diaphragm (2), the outer side of the first compensation diaphragm (2) is attached to the compensation cover (1), and the power core watertight connector (5) and the plug (12) are respectively provided on both sides of the left side of the sealing cylinder (4); and O-rings (9) are provided on both sides of the right side of the sealing cylinder (4).

2. The rotation performance test device of a deep-water hydraulic travel motor according to claim 1 is characterized in that: The first compensation diaphragm (2) and the compensation cover (1) are connected to the left side of the sealing cylinder (4) via a first screw (3); the first compensation diaphragm (2) is used to provide a compensation volume of 1.5L to achieve a dynamic balance between the hydraulic oil inside the sealing cylinder (4) and the external pressure environment; when the external pressure is sensed, the first compensation diaphragm (2) contracts, and the pressure of the internal hydraulic oil gradually increases to the external pressure state while the volume decreases, thereby achieving a balance between the internal and external pressures.

3. The rotation performance test device of a deep-water hydraulic travel motor according to claim 1 is characterized in that: The high-pressure water chamber outside the sealing cylinder (4) is pressurized by an external mechanism to increase the water pressure, thereby achieving a pressure of 0 to 6000 meters, which is consistent with the water pressure in the seawater.

4. The rotation performance test device of a deep-water hydraulic travel motor according to claim 1 is characterized in that: The sealing cylinder (4) is filled with hydraulic oil.

5. The rotation performance test device of a deep-water hydraulic travel motor according to claim 1 is characterized in that: The O-ring (9) is connected to the right side surface of the sealing cylinder (4) via a second screw (8).

6. The rotation performance test device of a deep-water hydraulic travel motor according to claim 1 is characterized in that: The motor fixing frame (14) is connected to the sealing cylinder (4) via a third screw (13).

7. The rotation performance test device of a deep-water hydraulic travel motor according to claim 1 is characterized in that: The pump (17) is connected to the hydraulic motor (18) via a clamping sleeve (11) to deliver hydraulic oil.

8. The rotation performance test device of a deep-water hydraulic travel motor according to claim 1 is characterized in that: A protruding second compensation diaphragm (15) is provided at the right end of the hydraulic motor (18).

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