Hydraulic device oil filling equipment and oil filling method

Abstract

The application discloses a kind of hydraulic device oil filling equipment of rotary displacement and oil filling method, the oil filling equipment includes support, vacuum pump, circulating pump and hydraulic oil tank;The support is equipped with oil return port, vacuum port and oil outlet;The oil return port is communicated with the top of the hydraulic oil tank, and the oil outlet is communicated with the bottom of the hydraulic oil tank;The vacuum port is communicated with the top of the hydraulic oil tank;The circulating pump is connected on the pipeline connecting the oil outlet and the hydraulic oil tank;The support is also provided with a rotating mechanism, and the rotating mechanism is used to fix the hydraulic device to be filled with oil, to drive the hydraulic device to rotate in the process of oil filling.The application can avoid bubbles into the hydraulic device in the process of oil filling.

Description

Technical Field

[0001] This invention relates to the field of hydraulic device filling equipment technology, specifically to a hydraulic device filling equipment and filling method for a rotary displacement hydraulic device. Background Technology

[0002] With the rapid development of the modern economy, hydraulic power devices are now widely used in industry, agriculture, marine, aviation, and military sectors. They are characterized by their ease of use, small footprint, low power consumption, high utilization rate, and resource conservation. As the demand for hydraulic devices continues to increase, there is a need for stable and efficient equipment to replenish the hydraulic fluid within these devices.

[0003] In existing technologies, the process of filling hydraulic devices with oil usually involves the presence of air bubbles. Since air bubbles can be highly compressed, their presence in the hydraulic system can affect its stability. Therefore, it is necessary to remove as many air bubbles as possible from the hydraulic device during the filling process.

[0004] In summary, preventing air bubbles from entering the hydraulic system during oil filling is one of the most important problems that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide an oil filling device and method for a rotary displacement hydraulic device to overcome the shortcomings of the prior art. It can prevent air bubbles from entering the hydraulic device during the oil filling process.

[0006] This invention proposes a hydraulic device filling equipment for rotary displacement, which includes a support, a vacuum pump, a circulating pump, and a hydraulic oil tank.

[0007] The bracket is equipped with an oil return port, a vacuum port, and an oil outlet; the oil return port is connected to the top of the hydraulic oil tank, the oil outlet is connected to the bottom of the hydraulic oil tank, and the vacuum port is connected to the top of the hydraulic oil tank.

[0008] The circulating pump is connected in series on the pipeline connecting the oil outlet and the hydraulic oil tank;

[0009] The bracket is also equipped with a rotating mechanism, which is used to fix the hydraulic device to be filled with oil, so as to drive the hydraulic device to rotate during the filling process.

[0010] The hydraulic device for rotary displacement described above, wherein, optionally, the rotary mechanism includes a first driver, a first mounting base, a second driver, and a second mounting base;

[0011] The first driver's shaft is fixedly connected to the mounting base, and the second driver is mounted on the first mounting base.

[0012] The second mounting base is mounted on the actuator of the second driver and can cooperate with the actuator of the second driver to clamp the hydraulic device to be filled with oil.

[0013] The shaft of the first driver is arranged horizontally.

[0014] In the rotary displacement hydraulic device filling device described above, optionally: the first driver is a drive motor, and the second driver is a cylinder, the cylinder being used to fix the hydraulic device to be filled with oil.

[0015] In the hydraulic device oil filling equipment for rotational displacement as described above, optionally: the first mounting base includes a first plate, a second plate and a third plate, wherein the first plate and the third plate are arranged in parallel and located on the same side of the second plate;

[0016] The second plate is fixedly connected to the rotating shaft of the first driver;

[0017] The second driver is mounted on the second board, and the actuating end of the second driver is located between the first board and the third board.

[0018] In the hydraulic device oil filling equipment for rotational displacement as described above, optionally: a cylinder switching valve is provided on the second plate, the cylinder switching valve being connected in series between the second actuator and the air pressure source to control the extension and retraction of the actuator of the second actuator.

[0019] In the hydraulic device oil filling equipment for rotational displacement as described above, optionally, an air circuit valve is also installed on the bracket, and the air circuit valve is connected in series between the cylinder switching valve and the air pressure source.

[0020] In the hydraulic device oil filling equipment for rotary displacement as described above, optionally, the number of the rotary mechanisms is multiple, and each rotary mechanism has a corresponding oil return port, a vacuum port and an oil outlet.

[0021] The present invention also proposes an oil filling method, which includes the following steps:

[0022] S1, Pre-operation of the oil filling equipment;

[0023] S2, Fix the hydraulic device to be filled with oil onto the rotating mechanism;

[0024] S3, connect the hydraulic device to be filled with oil to the corresponding return port and outlet port;

[0025] S4, turn on the vacuum pump and circulation pump until the vacuum level in the hydraulic oil tank is lower than the set pressure value;

[0026] S5, start the displacement rotation, so that the hydraulic device to be filled with oil can be filled with oil in the horizontal and vertical positions respectively, and stay in each position for no less than the first set time.

[0027] In the oil filling method described above, optionally, step S1 includes:

[0028] S11, Power on the equipment, add hydraulic oil to the hydraulic oil tank, and connect the oil outlet and oil return port through the pipeline;

[0029] S12, turn on the vacuum pump until the pressure in the hydraulic oil tank is lower than the set pressure value;

[0030] S13, start the circulation pump to make the oil circulation time reach the second set duration.

[0031] Compared with the prior art, the present invention, by setting up a vacuum pump, can maintain the hydraulic oil tank under negative pressure. By connecting the oil outlet and the oil return port, the hydraulic oil circulates in the oil filling device. Because the hydraulic oil tank is under negative pressure, the air bubbles in the hydraulic oil in the hydraulic oil tank expand and rise rapidly in the negative pressure environment, and then rise from the hydraulic oil. As the hydraulic oil circulates, the air bubbles in the oil in the oil filling device can expand and rise rapidly after entering the hydraulic oil tank, thereby removing the air bubbles in the oil in the oil filling device.

[0032] Maintaining negative pressure within the hydraulic oil tank during the filling process allows air bubbles in the hydraulic oil to rise rapidly and be expelled. This ensures that no air bubbles are present in the hydraulic oil flowing out of the outlet during the filling process.

[0033] By setting up a rotating mechanism to rotate during the oil filling process, air bubbles in the hydraulic device can be carried out by the hydraulic oil and enter the hydraulic oil tank. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the oil filling device of the hydraulic device for rotational displacement proposed in Embodiment 1 of the present invention;

[0035] Figure 2 This is a front view of the oil filling device of the hydraulic device for rotational displacement proposed in Embodiment 1 of the present invention;

[0036] Figure 3 This is a rear view of the oil filling device of the hydraulic device for rotational displacement proposed in Embodiment 1 of the present invention;

[0037] Figure 4 This is a front view of the rotating mechanism proposed in Embodiment 1 of the present invention;

[0038] Figure 5 This is a schematic diagram of the installation structure of the second driver proposed in Embodiment 1 of the present invention;

[0039] Figure 6 This is a flowchart of the oil filling method proposed in Embodiment 2 of the present invention;

[0040] Figure 7 This is a flowchart of the specific steps of step S1 proposed in Embodiment 2 of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1-Bracket, 2-Vacuum pump, 3-Circulation pump, 4-Hydraulic oil tank, 5-Rotating mechanism, 6-Air valve, 7-Wheel caster;

[0043] 11 - Oil return port, 12 - Vacuum port, 13 - Oil outlet;

[0044] 51 – First driver, 52 – First mounting base, 53 – Second driver, 54 – Second mounting base;

[0045] 521 - First plate, 522 - Second plate, 523 - Third plate, 524 - Cylinder switch valve. Detailed Implementation

[0046] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] To address the problems mentioned in the background art, the present invention provides the following embodiments.

[0048] Example 1

[0049] Please refer to the appendix. Figures 1 to 5 This embodiment proposes a hydraulic filling device for rotational displacement, comprising a support 1, a vacuum pump 2, a circulation pump 3, and a hydraulic oil tank 4. Specifically, the support 1 supports the entire filling device; the vacuum pump 2 evacuates the hydraulic oil tank 4 to create a negative pressure inside the tank. That is, by creating a negative pressure inside the hydraulic oil tank 4, air bubbles in the hydraulic oil are allowed to rise rapidly.

[0050] The bracket 1 is equipped with a return port 11, a vacuum port 12, and an outlet port 13. The return port 11 is connected to the top of the hydraulic oil tank 4, and the outlet port 13 is connected to the bottom of the hydraulic oil tank 4. The vacuum port 12 is connected to the top of the hydraulic oil tank 4. In practice, the hydraulic oil in the hydraulic oil tank 4 should not be too much or too little, so as to form a negative pressure in the hydraulic oil tank 4, allowing air bubbles in the hydraulic oil to rise quickly. In practice, it is best if the hydraulic oil occupies one-third to two-thirds of the volume of the hydraulic oil tank 4. When air bubbles in the hydraulic device enter the hydraulic oil tank 4, they can also rise quickly. In practice, in order to generate a sufficiently low negative pressure in the hydraulic oil tank 4, the hydraulic oil tank 4 should be sealed, that is, except for being connected to the vacuum port 12, the return port 11, and the outlet port 13, the hydraulic oil tank 4 should not be connected to other components.

[0051] In a specific implementation, the circulation pump 3 is connected in series on the pipeline connecting the oil outlet 13 and the hydraulic oil tank 4; the circulation pump 3 is used to drive the hydraulic oil in the hydraulic oil tank 4 to circulate, on the one hand to remove air bubbles inside the equipment, and on the other hand, to drive the oil in the hydraulic oil tank 4 to fill the hydraulic device.

[0052] The bracket 1 is also equipped with a rotating mechanism 5, which is used to fix the hydraulic device to be filled with oil, so as to drive the hydraulic device to rotate during the oil filling process. The purpose of setting the rotating mechanism 5 is to facilitate the discharge of air bubbles in the hydraulic device when filling it with oil.

[0053] In practical implementation, to achieve the function of rotating the hydraulic device, the rotating mechanism 5 includes a first driver 51, a first mounting base 52, a second driver 53, and a second mounting base 54; specifically, the first driver 51 is used to drive the first mounting base 52 to rotate, thereby driving the hydraulic device to rotate. The second driver 53 is used to clamp the hydraulic device.

[0054] The first driver 51 has its shaft fixedly connected to the mounting base. The second driver 53 is mounted on the first mounting base 52. The second mounting base 54 is mounted on the actuator of the second driver 53 and can cooperate with the actuator of the second driver 53 to clamp the hydraulic device to be filled with oil. The shaft of the first driver 51 is horizontally arranged. That is, the hydraulic device can rotate in a vertical plane to facilitate the rapid expulsion of air bubbles by utilizing the gravity of the hydraulic oil and the buoyancy of the air bubbles.

[0055] In a specific implementation, the first actuator 51 is a drive motor, and the second actuator 53 is a cylinder, which is used to fix the hydraulic device to be filled with oil. Specifically, the drive motor is a servo motor. In some structures, the first actuator 51 can also be made into a rotatable handle for manual operation. Other clamping components can also be used for clamping the second actuator 53.

[0056] In one implementation, the first mounting base 52 includes a first plate 521, a second plate 522, and a third plate 523. The first plate 521 and the third plate 523 are arranged in parallel and located on the same side of the second plate 522. The second plate 522 is fixedly connected to the rotating shaft of the first driver 51. The second driver 53 is mounted on the second plate 522, and the actuating end of the second driver 53 is located between the first plate 521 and the third plate 523. In practice, the first plate 521, the second plate 522, and the third plate 523 form a U-shaped structure.

[0057] In a specific implementation, the second plate 522 is provided with a cylinder switching valve 524, which is connected in series between the second driver 53 and the air pressure source to control the extension and retraction of the actuator of the second driver 53.

[0058] In a specific implementation, when the second actuator 53 is a cylinder, an air circuit valve 6 is also installed on the bracket 1 to facilitate air circuit control. The air circuit valve 6 is connected in series between the cylinder switching valve 524 and the air pressure source. In a specific implementation, when there are multiple second actuators 53, the air circuit valve 6 can be located on the main pipeline.

[0059] In practical implementation, to improve oil filling efficiency, multiple rotating mechanisms 5 are used, with each rotating mechanism 5 corresponding to one oil return port 11, one vacuum port 12, and one oil outlet 13. Multiple workstations can be set on the support 1, with each workstation equipped with one rotating mechanism 5, and corresponding to one oil return port 11, one vacuum port 12, and one oil outlet 13. Accordingly, multiple workstations can share one vacuum pump, one circulation pump 3, and one hydraulic oil tank 4 as needed; alternatively, each workstation can have its own vacuum pump, circulation pump 3, and hydraulic oil tank 4.

[0060] In practical implementation, multiple casters 7 are also included, which are installed at the bottom of the bracket 1. By providing casters 7, the entire device can be easily moved.

[0061] In a preferred implementation, for ease of operation, each workstation is equipped with a display unit. This display unit shows the vacuum level, pressure values, etc., of each component and issues an alarm when data anomalies occur. Simultaneously, the display unit can also show operating procedures.

[0062] In practice, all data and information should be recorded so that they can be archived after the oil filling process is completed, making the oil filling process traceable.

[0063] Example 2

[0064] This embodiment is a specific application of embodiment 1. The similarities will not be repeated. Only the differences will be explained below.

[0065] Please refer to Figure 6 and Figure 7 This embodiment proposes an oil filling method, including the following steps:

[0066] S1, pre-operate the oil filling equipment; the purpose of the pre-operation is mainly to remove air bubbles from the hydraulic oil inside the equipment, so as to avoid the presence of air bubbles in the hydraulic oil entering the hydraulic device.

[0067] Specifically, this step includes the following steps:

[0068] S11, the equipment is powered on, hydraulic oil is added to the hydraulic oil tank, and the oil outlet and return port are connected through the pipeline; that is, the oil of the equipment itself is first formed into a loop, so that the hydraulic oil can circulate continuously under the action of the circulation pump.

[0069] S12, turn on the vacuum pump until the pressure in the hydraulic oil tank is lower than the set pressure value; specifically, the set pressure value can be 12Pa, of course, other pressure values ​​can also be selected as needed, such as 10Pa, 15Pa, etc.

[0070] S13, start the circulation pump to make the oil circulation time reach the second set time. In specific implementation, the second set time is 1.5 to 3 hours, that is, through the continuous circulation of oil, the air bubbles in the oil are continuously removed.

[0071] S2, fix the hydraulic device to be filled with oil onto the rotating mechanism. In practice, the rotation center of the rotating mechanism should be perpendicular to the length of the hydraulic device as much as possible.

[0072] S3 connects the hydraulic device to be filled with oil to the corresponding return and outlet ports. That is, it forms a circuit between the hydraulic device to be filled with oil and the filling equipment. This allows the hydraulic oil to circulate between the filling equipment and the hydraulic device to be filled via a circulating pump.

[0073] S4, turn on the vacuum pump and circulation pump until the vacuum level in the hydraulic oil tank is less than the set pressure value; in specific implementation, the set pressure value here can be the same as the set pressure value in step S12.

[0074] S5, initiate the displacement rotation, causing the hydraulic device to be filled with oil to perform oil filling operations in both horizontal and vertical positions, with each position remaining for at least a first predetermined time. In specific implementations, to ensure that the airflow in the hydraulic device is fully expelled, the hydraulic device can be configured to remain in four positions, each for a first predetermined time. That is, starting with the hydraulic device arranged horizontally along its length, rotate clockwise or counterclockwise for one revolution, and during the rotation, remain for the first predetermined time after every 90 degrees of rotation. In specific implementations, the first predetermined time can be 20 to 40 minutes, with 30 minutes being preferred.

[0075] In practice, the above steps can be programmed into a computer program to perform the oil filling process as described above.

[0076] The above description, based on the embodiments shown in the figures, details the structure, features, and effects of the present invention. The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A hydraulic filling device for rotary displacement, characterized in that: Includes a support frame (1), a vacuum pump (2), a circulation pump (3), and a hydraulic oil tank (4); The bracket (1) is equipped with an oil return port (11), a vacuum port (12) and an oil outlet (13); the oil return port (11) is connected to the top of the hydraulic oil tank (4), the oil outlet (13) is connected to the bottom of the hydraulic oil tank (4), and the vacuum port (12) is connected to the top of the hydraulic oil tank (4). The circulating pump (3) is connected in series on the pipeline connecting the oil outlet (13) and the hydraulic oil tank (4); The bracket (1) is also provided with a rotating mechanism (5), which is used to fix the hydraulic device to be filled with oil, so as to drive the hydraulic device to rotate during the filling process. The rotating mechanism (5) includes a first driver (51), a first mounting base (52), a second driver (53), and a second mounting base (54); The shaft of the first driver (51) is fixedly connected to the mounting base, and the second driver (53) is mounted on the first mounting base (52). The second mounting base (54) is mounted on the actuator of the second driver (53) and can cooperate with the actuator of the second driver (53) to clamp the hydraulic device to be filled with oil; The shaft of the first driver (51) is arranged horizontally.

2. The hydraulic filling device for rotational displacement according to claim 1, characterized in that: The first driver (51) is a drive motor, and the second driver (53) is a cylinder, which is used to fix the hydraulic device to be filled with oil.

3. The hydraulic filling device for rotational displacement according to claim 2, characterized in that: The first mounting base (52) includes a first plate (521), a second plate (522) and a third plate (523), wherein the first plate (521) and the third plate (523) are arranged in parallel and located on the same side of the second plate (522); The second plate (522) is fixedly connected to the shaft of the first driver (51); The second driver (53) is mounted on the second plate (522), and the actuating end of the second driver (53) is located between the first plate (521) and the third plate (523).

4. The hydraulic filling device for rotational displacement according to claim 3, characterized in that: The second plate (522) is provided with a cylinder switching valve (524), which is connected in series between the second driver (53) and the air pressure source to control the extension and retraction of the actuator of the second driver (53).

5. The hydraulic filling device for rotational displacement according to claim 4, characterized in that: The bracket (1) is also equipped with an air passage valve (6), which is connected in series between the cylinder switching valve (524) and the air pressure source.

6. The hydraulic filling device for rotational displacement according to claim 1, characterized in that: The number of the rotating mechanisms (5) is multiple, and each rotating mechanism (5) has a return oil port (11), a vacuum port (12) and an oil outlet (13) corresponding to it.

7. The hydraulic filling device for rotary displacement according to any one of claims 1-6, characterized in that: It also includes multiple casters (7) mounted on the bottom of the bracket (1).

8. A method for filling an oil-filling device using a rotary displacement hydraulic device as described in any one of claims 1-7, characterized in that: Includes the following steps, S1, Pre-operation of the oil filling equipment; S2, Fix the hydraulic device to be filled with oil onto the rotating mechanism; S3, connect the hydraulic device to be filled with oil to the corresponding return port and outlet port; S4, turn on the vacuum pump and circulation pump until the vacuum level in the hydraulic oil tank is lower than the set pressure value; S5, start the displacement rotation, so that the hydraulic device to be filled with oil can be filled with oil in the horizontal and vertical positions respectively, and stay in each position for no less than the first set time.

9. The oil filling method according to claim 8, characterized in that: Step S1 includes, S11, Power on the equipment, add hydraulic oil to the hydraulic oil tank, and connect the oil outlet and oil return port through the pipeline; S12, turn on the vacuum pump until the pressure in the hydraulic oil tank is lower than the set pressure value; S13, start the circulation pump to make the oil circulation time reach the second set duration.

Images