A sealed test structure with double servo pressurization stabilization

Abstract

The application discloses a sealed test structure with double servo supercharging pressure stabilization, which comprises a test main body box and a test channel; an oil supply device comprises an oil tank, an oil pump, a filter assembly and a cooling machine; a double servo supercharging pressure stabilization device is arranged on the test main body box; a test working cavity for testing workpieces is arranged on the test main body box; the oil pump provides hydraulic oil; the filter assembly guarantees the cleanliness of the hydraulic oil; and the cooling machine lowers the temperature of the hydraulic oil; then the supercharging pump is responsible for quickly approaching the target pressure, completing the initial adjustment of the pressure, and then transmitting the oil pressure to the pressure stabilization pump; the pressure stabilization pump bears the high-precision pressure regulating function; according to the initial adjustment oil pressure output by the supercharging pump, the main controller controls the pressure stabilization driving piece to drive the transmission belt to rotate, so that the supercharging pump further fine adjusts the oil pressure to output the high-precision oil pressure and the stable pressure.

Description

Technical Field

[0001] This invention relates to the field of sealing performance testing technology, and in particular to a sealing test structure with dual servo boosting and stabilizing. Background Technology

[0002] Hydraulic systems are widely used in critical equipment such as governors of hydropower units. The hydraulic system, high-performance sealing devices, and hydraulic components (such as multi-way valves, relief valves, directional valves, throttle valves, pressure reducing valves, valve blocks, and integrated manifold blocks) ensure that hydraulic oil does not leak during operation. The reliability of the sealing performance directly affects the normal operation of the system and equipment safety: if the seal fails and hydraulic oil leaks, it will not only cause a drop in system pressure, affecting the control accuracy of the governor, but may also lead to environmental pollution and safety hazards. The shortcomings of existing hydraulic sealing performance testing methods mainly lie in their inability to meet high-pressure requirements, and the instability of pressure caused by temperature, leaks in connecting pipes, and the pressure supplied during the testing process, thus affecting the test results. Summary of the Invention

[0003] The purpose of this invention is to provide a sealing test structure with dual servo boosting and stabilizing, so as to solve the problems that existing hydraulic sealing performance testing devices cannot meet the high pressure requirements, and that the pressure is unstable due to temperature, leakage in connecting pipes, and the supply pressure during the test, which affects the test results.

[0004] The technical solution of the present invention: A sealing test structure with dual servo boosting and stabilizing voltage includes a test body box, wherein a test working cavity with an outward opening is provided on one end face of the test body box, and a test channel with internal and external penetration is provided on the inner side wall of the test working cavity;

[0005] An oil supply device, comprising an oil tank and an oil pump, wherein the oil tank is mounted inside the test main body box via an oil tank bracket and is located below the test working chamber, and the oil pump is mounted on one side of the oil tank and is connected to the oil tank via a pipeline;

[0006] A filter assembly is mounted on the main test chamber and located on one side of the oil tank, and is connected to the oil tank and the oil pump via a pipeline.

[0007] A cooling unit is located on one side of the oil tank and is connected to the oil pump via a pipeline.

[0008] A dual-servo booster and voltage stabilizer is installed on the main test chamber, with one end connected to the oil pump via a pipeline and the other end connected to the test channel.

[0009] Furthermore, the dual-servo booster and voltage regulator includes:

[0010] The main support frame is mounted on the test body box;

[0011] A booster assembly, comprising a booster pump and a booster drive, wherein the booster pump and the booster drive are connected to each other via a conveyor belt to achieve power transmission, and are disposed on the upper end face of the main support frame; the booster pump is provided with a one-way valve.

[0012] A voltage stabilizing assembly, comprising a voltage stabilizing pump and a voltage stabilizing drive, wherein the voltage stabilizing pump and the voltage stabilizing drive are connected to each other via a conveyor belt to achieve power transmission, and is disposed on the upper end face of the main support frame.

[0013] Furthermore, a booster ball screw is slidably connected to the booster pump side, and a booster piston rod is provided on the upper end face of the booster ball screw and located inside the booster pump.

[0014] Furthermore, a pressure-stabilizing ball screw is slidably connected to the inner side of the pressure-stabilizing pump, and a pressure-stabilizing piston rod is provided on the upper end face of the pressure-stabilizing ball screw and located inside the pressure-stabilizing pump.

[0015] Furthermore, the lower ends of the pressure boosting ball screw and the pressure stabilizing ball screw pass through the upper end face of the main support frame, and both are provided with driven wheels on the lower end face of the main support frame.

[0016] Furthermore, both the booster drive and the stabilizing drive are provided with drive wheels at their lower ends and on the lower side face of the main support frame. The drive wheels and the driven wheels transmit power through the transmission-to-cooperation connection.

[0017] Furthermore, both the booster pump and the stabilizing pump are equipped with pressure sensors on their upper surfaces.

[0018] Furthermore, both the pressure boosting ball screw and the pressure stabilizing ball screw have sensor plates on their lower end faces, and a displacement sensor is located on the lower side of the sensor plate and on the main support frame.

[0019] Furthermore, a pneumatic switching valve assembly is provided between the dual servo booster and pressure stabilizer and the oil tank;

[0020] The pneumatic switching valve assembly includes a low-pressure pneumatic switching valve, a medium-pressure pneumatic switching valve, and a high-pressure pneumatic switching valve.

[0021] A pneumatic shut-off valve is provided between the dual servo booster and regulator and the pneumatic switching valve group.

[0022] Furthermore, the filtering component includes:

[0023] A filter support frame is mounted on the main test chamber and located on one side of the oil tank bracket;

[0024] The first filter is mounted on the filter support frame and is connected to the oil pump via a pipe.

[0025] The second filter is fixedly connected to the test body box via a connecting plate and is located on one side of the filter support frame.

[0026] The advantages of this invention compared to existing technologies are as follows: A test chamber for testing the workpiece is set on the test body housing. Hydraulic oil is supplied by an oil pump, and the cleanliness of the hydraulic oil is ensured by a filtration process. A cooler further reduces the hydraulic oil temperature. A booster pump is responsible for quickly approaching the target pressure to complete the initial pressure adjustment. The oil pressure is then transmitted to a stabilizing pump, which performs high-precision pressure regulation. Based on the initial pressure output from the booster pump, the main controller controls the stabilizing drive to rotate the conveyor belt, causing the booster pump to fine-tune the oil pressure, thereby outputting high-precision and stable oil pressure. Compared to traditional transmission-based booster and stabilizing structures, this system offers higher pressure control precision and less pressure output fluctuation. Furthermore, leveraging the closed-loop control characteristics of the servo motor, it can adjust the output pressure in real-time according to actual working conditions, adapting to various high-pressure testing and operational requirements. By installing a pressure sensor on the booster and stabilizing pump, the system collects output oil pressure signals in real-time, feeding them back to the servo control terminal via the main controller, thus improving the dynamic stability of pressure regulation. Additionally, multiple sets of control parameters can be preset for different pressure ranges, enabling one-click switching of output pressure, further expanding the application scenarios of this pressure stabilizing system and enhancing the ease of use. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the overall structure of the filter assembly and oil supply device of the present invention;

[0031] Figure 5 This is a schematic diagram of the overall structure of the dual-servo booster and voltage stabilizer device of the present invention;

[0032] Figure 6 This is a schematic diagram of the overall structure of the dual-servo booster and voltage stabilizer device of the present invention;

[0033] Figure 7This is a schematic diagram of the overall structure of the dual-servo booster and voltage stabilizer device of the present invention;

[0034] Figure 8 for Figure 7 Sectional view along the center line at point "AA";

[0035] Figure 9 This is a schematic diagram of the hydraulic principle of the present invention. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0038] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0039] See Figure 1-8The present invention discloses a sealing test structure with dual servo boosting and stabilizing, comprising a test body box 1, wherein one end face of the test body box 1 has a test working chamber 10 with an outward opening, and the inner side wall of the test working chamber 10 has a test channel 13 penetrating both inside and outside; and an oil supply device, comprising an oil tank 21 and an oil pump 6, wherein the oil tank 21 is disposed inside the test body box 1 via an oil tank bracket 20 and is located below the test working chamber 10, and the oil pump 6 is disposed on one side of the oil tank 21 and is connected to the test working chamber 10 via a pipeline. The oil tank 21 is connected in conjunction with the filter assembly 3, which is located on the test main body box 1 and on one side of the oil tank 21, and is connected to the oil tank 21 and the oil pump 6 through a pipe; the cooler 4 is located on one side of the oil tank 21 and is connected to the oil pump 6 through a pipe; the dual servo booster and voltage stabilizer 7 is located on the test main body box 1, with one end connected to the oil pump 6 through a pipe and the other end connected to the test channel 13.

[0040] In use, a test working cavity 10 with an outward opening is opened on the test main body box 1 to place the workpiece 901 to be tested, and the workpiece is sealed to the test workpiece through the outlet of the test channel 13 to achieve the testing purpose. Multiple sets of cameras 12 can be installed inside the formed test working cavity 10 to facilitate observation of the workpiece. Two sets of symmetrical protective doors 16 are installed at the opening, and the protective doors 16 are connected to the test main body box 1 by hinge locks for easy opening and closing. A grid area 106 is set on the front end face of the protective doors 16 for easy observation. A through-cavity placement chamber 100 can be set in the test main body box 1 within the test working cavity 10 to provide a placement position for the oil supply device and filter assembly 3. Protective doors 15 are installed at the openings on both sides of the formed placement chamber 100 to protect the internal components. The oil supply device consists of an oil pump 6 and an oil tank 21. The oil pump 6 and oil tank 21 are connected by a pipeline. A stainless steel ball valve 22 installed in the oil tank 21 can be used for oil unloading. The oil pump 6 is then connected to a filter assembly via another pipeline, and further connected to a dual-servo booster and pressure stabilizer 7 via another pipeline. Finally, it connects to the inlet of the test channel 13 to boost and stabilize the test pressure of the test piece, especially for supplying oil to piston-type hydraulic cylinders to achieve oil transmission. Furthermore, a test pressure gauge 11.1 is installed on the inner side wall of the test working chamber 10 to detect the pressure.

[0041] Specifically, the dual-servo booster and voltage stabilizer 7 includes a main support frame 70, which is mounted on the test body box 1; a booster assembly, which includes a booster pump 72 and a booster drive 76, connected by a conveyor belt 740 for power transmission, and is located on the upper end face of the main support frame 70; the booster pump 72 is equipped with a one-way valve 75; and a voltage stabilizer assembly, which includes a voltage stabilizer pump 71 and a voltage stabilizer drive 77, connected by a conveyor belt 740 for power transmission, and is also located on the upper end face of the main support frame 70. An outward-facing placement slot 101 is formed on the other end face of the test body box 1 to serve as the placement space for the entire dual-servo booster and voltage stabilizer 7, and a protective door 14 is installed at the opening of the placement slot 101 for protection. In use, a booster drive 76 and a pressure stabilizing drive 77 provide power to the booster pump 72 and the pressure stabilizing pump 71, respectively. Both the booster pump 72 and the pressure stabilizing pump 71 have pressure sensors 73 on their upper surfaces. The booster pump 72 is responsible for quickly approaching the target pressure and completing the initial pressure adjustment. Then, the pressure sensor 73 transmits the oil pressure to the pressure stabilizing pump 71, which performs high-precision pressure regulation. Based on the initial oil pressure output by the booster pump 72, the main controller 5 controls the pressure stabilizing drive to rotate the conveyor belt, causing the booster pump to fine-tune the oil pressure, thereby outputting high-precision and stable oil pressure. A booster ball screw 702 is slidably connected to the side of the booster pump 72. The upper surface of the booster ball screw 702 is equipped with a booster piston rod 7002 located inside the booster pump 72. A pressure-stabilizing ball screw 701 is slidably connected to the inner side of the pressure-stabilizing pump 71. A pressure-stabilizing piston rod 7001 is provided on the upper end face of the pressure-stabilizing ball screw 701 and inside the pressure-stabilizing pump 71. The lower ends of the boosting ball screw 702 and the pressure-stabilizing ball screw 701 pass through the upper end face of the main support frame 70, and driven wheels 710 are provided on the lower end face of the main support frame 70. The lower ends of the boosting drive component 76 and the pressure-stabilizing drive component 77 are provided on the lower end face of the main support frame 70, and power is transmitted between the driven wheels 780 and the driven wheels 710 through the transmission-to-fit connection. The booster drive 76 is composed of a servo motor and a precision planetary reducer 78. The output torque of the servo motor is first reduced by 10:1 by the precision planetary reducer. The servo motor and the precision planetary reducer are connected by a conventional key. After being reduced by 50:25 by the transmission belt 740, the transmission belt drives the booster ball screw 702, the pressure stabilizing ball screw 701, and the mutually cooperating booster piston rod 7002 and pressure stabilizing piston rod 7001 to reciprocate. Finally, the ball screw compresses the oil inside the booster pump and the pressure stabilizing pump, and outputs high-pressure hydraulic oil with a pressure range of 10-100MPa by changing the oil volume.To ensure the normal output of high-pressure hydraulic oil, a check valve needs to be installed at the inlet of the booster pump. A check valve 75 is also installed between the booster pump outlet and the pressure stabilizing pump inlet to ensure high-precision adjustment. In practice, to ensure the stability of the booster ball screw 702 and the pressure stabilizing ball screw 701, a limiting plate 730 is installed on the lower end face of the main support frame 70, located below the driven wheel 710. The lower ends of both the booster ball screw 702 and the pressure stabilizing ball screw 701 pass through the limiting plate 730, and a protective sleeve 750 is installed between the connection point and the limiting plate 730 to prevent wear during movement.

[0042] Specifically, both the pressure boosting ball screw 702 and the pressure stabilizing ball screw 701 are provided with sensor plates 703 on their lower end faces. A displacement sensor 730 is provided on the lower side of the sensor plate 703 and on the main support frame 70. The displacement sensor 730 detects the position of the sensor plate 703 and feeds the information back to the main controller 5, thereby controlling the downward movement of the pressure boosting ball screw 702 and the pressure stabilizing ball screw 701.

[0043] Specifically, a pneumatic switching valve assembly 8 is provided between the dual-servo booster and pressure stabilizer 7 and the oil tank 21. The pneumatic switching valve assembly 8 includes a low-pressure pneumatic switching valve 81, a medium-pressure pneumatic switching valve 82, and a high-pressure pneumatic switching valve 83. The valve assembly is connected to the test body box 1 via a valve assembly bracket 80, located at the entrance of the test channel 13, for placing the valve assembly. The pressure of the low-pressure pneumatic switching valve 81 is 0-10 MPa; the pressure of the medium-pressure pneumatic switching valve 82 is 0-40 MPa; and the pressure of the high-pressure pneumatic switching valve 83 is 0-100 MPa. In use, a pneumatic shut-off valve 84 is provided between the dual-servo booster and pressure stabilizer 7 and the pneumatic switching valve assembly. The pneumatic shut-off valve 84 is connected to the valve assembly bracket 80 via a pipeline. Depending on the pressure requirements of the test workpiece, the supplied oil enters the test channel through the required pneumatic switching valve assembly 8, providing oil pressure to the workpiece under test.

[0044] Specifically, the filter assembly 3 includes a filter support frame 30, which is mounted on the test main body box 1 and located on one side of the oil tank bracket 20; a first filter 31, which is mounted on the filter support frame 30 and connected to the oil pump 7 via a pipe, forming a first filter 31 mainly connected to the oil pump, filtering the oil drawn from the oil tank by the oil pump, and then transmitting it to the dual servo booster and pressure stabilizing device 7 for pressurization. At the same time, the tested oil is recycled back to the oil tank through the first filter 31; and a second filter 33, which is fixedly connected to the test main body box 1 via a connecting plate 32 and located on one side of the filter support frame 30. The second filter 33 is mainly used to collect oil leaking inside the test working chamber 10. A mesh leak plate 11 is set at the bottom of the inner side of the test working chamber to facilitate the leakage of oil. The lower side of the mesh leak plate 11 is set as a guide funnel 17. The lower outlet of the guide funnel 17 is connected to the second filter 33 for filtration and then transported back to the oil tank.

[0045] The original diagram of the entire testing facility is available for reference. Figure 9 In the process, the formed oil tank 21 is connected to two external lines: a filter assembly 3 and an oil pump 6. A direct-guided relief valve 5 is installed between the filter assembly 3 and the oil pump 6 to prevent excessive pressure provided by the oil pump 6 during operation. The direct-guided relief valve 5 allows the hydraulic oil in the pipeline to be returned to the oil tank. The formed filter assembly 3 is first connected to a pneumatic switching valve group 8. A cooler 4 and a pressure sensor 73 are sequentially installed between the oil pump 6 and the pneumatic switching valve group 8. After that, the filter assembly 3 is connected to a booster pump 72 and a pressure stabilizing pump 71. Both the pressure stabilizing pump and the booster pump are equipped with pressure sensors 73. After the booster pump 72 and the pressure stabilizing pump 71, two sets of pneumatic shut-off valves 84 with pressure sensors 73 are sequentially connected, as well as a temperature sensor 2.1, a pressure gauge 11.1, and finally, they are connected to the test channel 13 inside the test working chamber 10 on the test body box 1 to achieve the test of the workpiece. Multiple cameras 12 are installed inside the formed test chamber 10, and a guide funnel 17 for oil recovery is used. The guide funnel 17 is connected to the oil tank 21 via a pipe, and a filter assembly 3 is installed on the pipe to filter the recovered hydraulic oil. Furthermore, its temperature sensor 2.1 and pneumatic shut-off valve 84 are connected to the oil tank 21 via a pipe to realize the recovery of hydraulic oil after the test, and a pneumatic shut-off valve 84 is installed on the pipe. Each filter is equipped with a manual pointer valve 5.2 for draining oil during maintenance.

[0046] In addition to the preferred embodiments described above, there are other embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection claimed by the present invention.

Claims

1. A sealing test structure with dual servo boosting and stabilizing, characterized in that, include: The test body box (1) has a test working cavity (10) with an outward opening on one side end face, and a test channel (13) with internal and external penetration is provided on the inner side wall of the test working cavity (10). The oil supply device includes an oil tank (21) and an oil pump (6). The oil tank (21) is installed inside the test main body box (1) via an oil tank bracket (20) and is located below the test working chamber (10). The oil pump (6) is installed on one side of the oil tank (21) and is connected to the oil tank (21) via a pipeline. The filter assembly (3) is set on the test body box (1) and located on one side of the oil tank (21), and is connected to the oil tank (21) and the oil pump (6) through a pipeline; Cooler (4), the cooler (4) is located on one side of the oil tank (21) and is connected to the oil pump (6) through a pipeline; Dual servo booster and voltage stabilizer (7) is installed on the test main body box (1), and one end is connected to the oil pump (6) through a pipeline, and the other end is connected to the test channel (13).

2. The sealing test structure with dual servo boosting and stabilizing voltage as described in claim 1, characterized in that, The dual-servo booster and voltage regulator (7) includes: Main support frame (70), which is mounted on the test body box (1); The booster assembly includes a booster pump (72) and a booster drive (76). The booster pump (72) and the booster drive (76) are connected to each other through a transmission belt (740) to achieve power transmission. The booster is located on the upper end face of the main support frame (70). The booster pump (72) is equipped with a one-way valve (75). The voltage stabilizing component includes a voltage stabilizing pump (71) and a voltage stabilizing drive (77). The voltage stabilizing pump (71) and the voltage stabilizing drive (77) are connected to each other through a transmission belt (740) to achieve power transmission, and are located on the upper end face of the main support frame (70).

3. A sealing test structure with dual servo boosting and stabilizing voltage as described in claim 2, characterized in that, The booster pump (72) is slidably connected to a booster ball screw (702), and a booster piston rod (7002) is provided on the upper end face of the booster ball screw (702) and inside the booster pump (72).

4. A sealing test structure with dual servo boosting and stabilizing voltage as described in claim 3, characterized in that, The pressure stabilizing pump (71) is slidably connected to a pressure stabilizing ball screw (701) on its inner side. The pressure stabilizing ball screw (701) has a pressure stabilizing piston rod (7001) on its upper end face and located inside the pressure stabilizing pump (71).

5. A sealing test structure with dual servo boosting and stabilizing voltage as described in claim 4, characterized in that, The lower ends of the pressure boosting ball screw (702) and the pressure stabilizing ball screw (701) pass through the upper end face of the main support frame (70), and both are provided with driven wheels (710) at the lower end face of the main support frame (70).

6. A sealing test structure with dual servo boosting and stabilizing voltage as described in claim 5, characterized in that, The booster drive (76) and the stabilizing drive (77) are both provided with drive wheels (780) on the lower end of the main support frame (70). The drive wheels (780) and the driven wheels (710) are connected by the transmission belt (740) to transmit power.

7. A sealing test structure with dual servo boosting and stabilizing voltage as described in claim 2, characterized in that, Pressure sensors (73) are provided on the upper surfaces of both the booster pump (72) and the stabilizing pump (71).

8. A sealing test structure with dual servo boosting and stabilizing voltage as described in claim 2, characterized in that, The lower end face of both the booster ball screw (702) and the stabilizing ball screw (701) is provided with a sensor plate (703). On the lower side of the sensor plate (703) and located on the main support frame (70), a displacement sensor (730) is provided.

9. A sealing test structure with dual servo boosting and stabilizing voltage as described in claim 1, characterized in that, A pneumatic switching valve group (8) is provided between the dual servo booster and regulator (7) and the oil tank (21). The pneumatic switching valve assembly (8) includes a low-pressure pneumatic switching valve (81), a medium-pressure pneumatic switching valve (82), and a high-pressure pneumatic switching valve (83). A pneumatic shut-off valve (84) is provided between the dual servo booster and regulator (7) and the pneumatic switching valve group.

10. A sealing test structure with dual servo boosting and stabilizing voltage as described in claim 9, characterized in that, The filter component (3) includes: A filter support frame (30) is provided on the test body box 1 and located on one side of the oil tank bracket (20); The first filter (31) is disposed on the filter support frame (30) and is connected to the oil pump (7) through a pipe; The second filter (33) is fixedly connected to the test body box (1) by a connecting plate (32) and is located on one side of the filter support frame (30).

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