Efficient hydraulic oil pump pressure maintaining device

Abstract

The utility model relates to the technical field of hydraulic oil pumps, in particular to an efficient hydraulic oil pump pressure maintaining device which comprises an oil tank, a hydraulic oil pump is arranged on the top of the oil tank, and a mechanical pressure regulator and a dynamic pressure compensation unit are further arranged on the top of the oil tank. A first connecting end is arranged at the front end, close to the bottom, of the outer wall of the hollow column, the output end of the hydraulic oil pump communicates with the first connecting end through an oil feeding pipe, and the dynamic pressure compensation unit comprises a pressure compensation pump, a differential pressure sensor and a controller. According to the efficient hydraulic oil pump pressure maintaining device, through cooperative use of the mechanical pressure regulator and the dynamic pressure compensation unit, the device can regulate the pressure in real time and respond to changes of system loads, and the stability of oil outlet pressure is ensured. Through the design of an adjusting screw rod, an annular pressing plate and an adjusting spring, a user can manually adjust the output pressure according to needs, and precise control is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil pumps, in particular to a high-efficiency hydraulic oil pump pressure maintaining device. Background Art

[0002] Hydraulic systems have been widely used in many fields such as industrial machinery, aerospace, and construction equipment due to their advantages of high power output, simple control, and fast response. As the heart of the hydraulic system, the performance of the hydraulic oil pump directly determines the stability and efficiency of the system. The hydraulic oil pump provides power for the entire system by converting mechanical energy into liquid pressure energy.

[0003] However, during long-term operation, the output pressure of the hydraulic oil pump may not be stable enough due to various reasons. These influencing factors mainly include: internal wear of the oil pump, temperature changes of the hydraulic oil, air intrusion in the system, oil contamination, and system oil leakage. The unstable output pressure will not only reduce the response speed and working efficiency of the system, but also may cause excessive wear and even failure of the system, increasing maintenance costs and downtime.

[0004] The traditional solution to this problem mainly relies on regular system inspection and maintenance, and manually adjusting the oil pump or various valves in the hydraulic system to stabilize the pressure. However, this method requires manual intervention, which is not only time-consuming and labor-intensive, but also unable to respond to small changes in pressure in the system in real time, making it difficult to accurately control and maintain the required pressure level. In addition, for complex hydraulic systems or equipment operating in harsh environments, regular maintenance and manual adjustments are more difficult and the results are less than ideal. In view of this, we propose an efficient hydraulic oil pump pressure maintenance device. Utility Model Content

[0005] The purpose of the utility model is to provide a high-efficiency hydraulic oil pump pressure maintaining device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An efficient hydraulic oil pump pressure maintaining device comprises an oil tank, a hydraulic oil pump is arranged on the top of the oil tank, an input end of the hydraulic oil pump is connected to the oil tank through a first oil pumping pipe, and a mechanical pressure regulator and a dynamic pressure compensation unit are also arranged on the top of the oil tank;

[0008] The cam is connected with the oil pump through the bottom end of the oil pump sleeve, and the cam is connected with the oil pump sleeve through the top end of the oil pump sleeve.

[0009] The hydraulic oil pump delivers the oil in the oil tank to the hollow column. The oil pushes the piston upward to expose the front end of the oil outlet pipe, so that the oil is output from the oil outlet pipe. The height of the annular pressure plate is adjusted by adjusting the screw rod, thereby adjusting the distance between the annular pressure plate and the piston, and then adjusting the compression amount of the adjustment spring;

[0010] When the output pressure needs to be increased, the preload of the adjusting spring is increased by tightening the adjusting screw. This increased force is transmitted through the piston, exerting greater pressure on the oil under the piston, causing the oil outlet pipe to be partially closed. Because the opening for the oil to enter the oil outlet pipe becomes smaller, the flow of oil is hindered, the flow rate is reduced, and the pressure in the system increases;

[0011] When the output pressure needs to be reduced, the preload of the adjusting spring will be reduced by loosening the adjusting screw. The reduction of the spring force means that the force applied to the piston is reduced, so that the opening area of ​​the oil outlet pipe is reduced, so that the oil can enter the oil outlet pipe more easily, increasing the flow rate, thereby reducing the pressure in the system;

[0012] The dynamic pressure compensation unit includes a pressure compensation pump, a pressure differential sensor and a controller. The input end of the pressure compensation pump is connected to the oil tank through a second oil suction pipe. The output end of the pressure compensation pump is provided with a pressure compensation pipe. The pressure compensation pipe is provided with a one-way valve to prevent the oil in the oil outlet pipe from entering the pressure compensation pump. The output end of the pressure compensation pipe is connected to the second connecting end. The two ends of the pressure differential sensor are respectively connected to the first liquid guide pipe and the second liquid guide pipe. The oil delivery pipe is provided with a fourth connecting end. The end of the first liquid guide pipe away from the pressure differential sensor is connected to the fourth connecting end, and the end of the second liquid guide pipe away from the pressure differential sensor is connected to the third connecting end. The pressure differential sensor can detect the pressure difference between the output of the hydraulic oil pump and the output of the mechanical pressure regulator, which is crucial for real-time pressure regulation. The pressure compensation pump provides the necessary fluid power to input oil into the oil outlet pipe, and dynamically adjusts the system pressure according to the detection data of the pressure differential sensor to offset the pressure fluctuation caused by load changes or other factors, thereby realizing the pressure maintenance function, avoiding the reduction of the system's response speed and working efficiency due to the instability of the output pressure, and preventing excessive wear and failure of the system.

[0013] Preferably, a mounting base is provided at the bottom of the hollow column, and the mounting base is detachably connected to the top of the oil tank by bolts to fix the position of the hollow column.

[0014] Preferably, an annular support block is provided on the inner wall of the hollow column, the annular support block is close to the top of the first connecting end, and the annular support block is located below the oil outlet pipe. The top of the annular support block is against the bottom of the piston, supporting the position of the piston and keeping the piston fixed under normal conditions.

[0015] Preferably, the outer wall of the internally threaded fixing tube is threadedly connected with a fastening bolt, and the threaded end of the fastening bolt abuts against the outer wall of the adjusting screw to tighten the position of the adjusting screw to prevent the adjusting screw from moving up and down due to vibration.

[0016] Preferably, a circular groove is provided at the bottom of the adjusting screw, and a movable rod is provided in the middle of the top of the piston. The movable rod is slidably connected in the circular groove, which is conducive to the stable upward and downward movement of the piston and can also make the force of multiple adjusting springs uniform.

[0017] Preferably, an annular limit block is provided on the outer wall of the movable rod near the bottom to prevent the movable rod from moving upward excessively, thereby preventing the piston from over-squeezing the multiple adjustment springs and preventing the adjustment springs from being damaged by excessive compression.

[0018] Preferably, a mounting bracket is provided at the bottom of the differential pressure sensor, and the mounting bracket is detachably connected to the top of the oil tank by bolts, so that the position of the differential pressure sensor is fixed.

[0019] Preferably, the pressure compensating pump and the pressure differential sensor are electrically connected to the controller via wires respectively, and the controller receives a detection signal from the pressure differential sensor, and controls the start and stop of the pressure compensating pump.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. This high-efficiency hydraulic oil pump pressure maintenance device, through the use of a mechanical pressure regulator and a dynamic pressure compensation unit, can adjust the pressure in real time, respond to changes in system load, and ensure the stability of the oil output pressure. The design of the adjusting screw, annular pressure plate and adjusting spring allows the user to manually adjust the output pressure as needed to achieve precise control.

[0022] 2. This high-efficiency hydraulic oil pump pressure maintaining device uses a differential pressure sensor to detect the pressure difference between the hydraulic oil pump output and the mechanical pressure regulator output. Combined with the controller and the pressure compensation pump, it can automatically adjust the compensation pressure, which is essential to prevent pressure fluctuations caused by load changes or other factors, and maintain the consistency and stability of the system pressure.

[0023] 3. The design of the high-efficiency hydraulic oil pump pressure maintaining device, hollow column, adjusting screw, annular support block, piston and other components, as well as the addition of movable rod and annular limit block, provide a stable up and down movement path and uniform force for the piston, avoiding excessive wear and damage of components and extending the service life of the equipment.

[0024] 4. The high-efficiency hydraulic oil pump pressure maintaining device can effectively offset the impact of load changes by quickly adjusting the pressure in the system, avoiding the instability of output pressure, thereby improving the working efficiency and response speed of the system.

[0025] 5. This high-efficiency hydraulic oil pump pressure maintaining device reduces excessive wear of equipment during operation by maintaining a stable oil pressure output, enhances system reliability, reduces the probability of failure, saves users maintenance costs and avoids potential downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall first-view structure of the utility model;

[0027] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0028] Figure 3 It is a partial structural schematic diagram of the utility model;

[0029] Figure 4 It is a schematic diagram of the structure of the mechanical pressure regulator in the utility model;

[0030] Figure 5 It is a schematic diagram of the cross-sectional structure of the hollow column in the utility model;

[0031] Figure 6 It is a partial structural schematic diagram of the mechanical pressure regulator in the utility model;

[0032] Figure 7 It is a schematic diagram of the assembly structure of the adjusting screw and the movable rod in the utility model.

[0033] In the figure: 1. oil tank; 2. hydraulic oil pump; 3. mechanical pressure regulator; 30. hollow column; 300. first connecting end; 301. annular support block; 31. oil outlet pipe; 310. second connecting end; 311. third connecting end; 32. internal thread fixing pipe; 33. adjusting screw; 330. annular pressure plate; 331. circular groove; 34. movable rod; 340. annular limit block; 35. piston; 36. adjusting spring; 37. fastening bolt; 38. mounting base; 4. dynamic pressure compensation unit; 40. pressure compensation pump; 41. differential pressure sensor; 42. controller; 43. pressure compensation pipe; 44. one-way valve; 45. first liquid guide pipe; 46. second liquid guide pipe; 47. mounting bracket; 5. oil delivery pipe; 50. fourth connecting end. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] See also Figure 1-Figure 7 , the utility model provides a technical solution:

[0037] An efficient hydraulic oil pump pressure maintaining device comprises an oil tank 1, a hydraulic oil pump 2 is arranged on the top of the oil tank 1, an input end of the hydraulic oil pump 2 is connected to the oil tank 1 through a first oil pumping pipe, and a mechanical pressure regulator 3 and a dynamic pressure compensation unit 4 are also arranged on the top of the oil tank 1;

[0038] The mechanical pressure regulator 3 includes a hollow column 30, a first connection end 300 is provided at the front end of the outer wall of the hollow column 30 and near the bottom, the output end of the hydraulic oil pump 2 is connected to the first connection end 300 through the oil delivery pipe 5, an internal threaded fixed tube 32 is provided at the top of the hollow column 30, an adjusting screw 33 is internally threadedly connected to the internal threaded fixed tube 32, the bottom end of the adjusting screw 33 passes through the top of the hollow column 30, an annular pressure plate 330 is rotatably connected to the bottom end of the outer wall of the adjusting screw 33, a plurality of adjusting springs 36 arranged in an annular array are provided at the bottom of the annular pressure plate 330, a piston 35 is fixedly connected to the bottom ends of the plurality of adjusting springs 36, an oil outlet pipe 31 is provided at the middle and lower part of the rear end of the outer wall of the hollow column 30, the front end of the oil outlet pipe 31 passes through the outer wall of the hollow column 30 and is tightly fitted with the outer wall of the piston 35, a second connection end 310 is provided at the middle part of the top of the outer wall of the oil outlet pipe 31, and a third connection end 311 is provided at the top of the outer wall of the oil outlet pipe 31 and near the rear end;

[0039] The hydraulic oil pump 2 delivers the oil in the oil tank 1 to the hollow column 30, and the oil pushes the piston 35 to move upward, exposing the front end of the oil outlet pipe 31, so that the oil is output from the oil outlet pipe 31, and the height of the annular pressure plate 330 is adjusted by adjusting the screw rod 33, thereby adjusting the distance between the annular pressure plate 330 and the piston 35, and then adjusting the compression amount of the adjustment spring 36;

[0040] When the output pressure needs to be increased, by tightening the adjusting screw 33, the preload force of the adjusting spring 36 is increased. This increased force is transmitted through the piston 35, exerting greater pressure on the oil below the piston 35, causing the oil outlet pipe 31 to be partially closed. Because the opening for the oil to enter the oil outlet pipe 31 becomes smaller, the flow of the oil is hindered, the flow rate is reduced, and the pressure in the system is increased;

[0041] When the output pressure needs to be reduced, the preload force of the adjusting spring 36 is reduced by loosening the adjusting screw 33. The reduction of the spring force means that the force applied to the piston 35 is reduced, so that the opening area of ​​the oil outlet pipe 31 blocked is reduced, so that the oil can enter the oil outlet pipe 31 more easily, increasing the flow rate, thereby reducing the pressure in the system;

[0042] The dynamic pressure compensation unit 4 includes a pressure compensation pump 40, a pressure difference sensor 41 and a controller 42. The input end of the pressure compensation pump 40 is connected to the oil tank 1 through a second oil pumping pipe. The output end of the pressure compensation pump 40 is provided with a pressure compensation pipe 43. The pressure compensation pipe 43 is provided with a one-way valve 44 to prevent the oil in the oil outlet pipe 31 from entering the pressure compensation pump 40. The output end of the pressure compensation pipe 43 is connected to the second connecting end 310. The two ends of the pressure difference sensor 41 are respectively connected to a first liquid guide pipe 45 and a second liquid guide pipe 46. The oil delivery pipe 5 is provided with a fourth connecting end 50. The end of the first liquid guide pipe 45 away from the pressure difference sensor 41 is connected to the fourth connecting end 50. The connecting terminal 50 is connected, and one end of the second fluid conduit 46 away from the pressure difference sensor 41 is connected to the third connecting terminal 311. The pressure difference sensor 41 can detect the pressure difference between the output of the hydraulic oil pump 2 and the output of the mechanical pressure regulator 3, which is crucial for real-time pressure regulation. The pressure compensation pump 40 provides the necessary fluid power to input oil into the oil outlet pipe 31, and dynamically adjusts the system pressure according to the detection data of the pressure difference sensor 41 to offset the pressure fluctuation caused by load changes or other factors, thereby achieving the pressure maintenance function, avoiding reducing the system's response speed and working efficiency due to the instability of the output pressure, and preventing excessive wear and failure of the system.

[0043] In this embodiment, a mounting base 38 is provided at the bottom of the hollow column 30 , and the mounting base 38 is detachably connected to the top of the oil tank 1 by bolts, so that the position of the hollow column 30 is fixed.

[0044] Specifically, the inner wall of the hollow column 30 is provided with an annular support block 301, which is close to the top of the first connecting end 300 and is located below the oil outlet pipe 31. The top of the annular support block 301 is against the bottom of the piston 35, supporting the position of the piston 35 so that the piston 35 remains fixed under normal conditions.

[0045] Furthermore, a fastening bolt 37 is threadedly connected to the outer wall of the internally threaded fixing tube 32, and the threaded end of the fastening bolt 37 abuts against the outer wall of the adjusting screw 33 to tighten the position of the adjusting screw 33 to prevent the adjusting screw 33 from moving up and down due to vibration.

[0046] Furthermore, a circular groove 331 is provided at the bottom of the adjusting screw 33, and a movable rod 34 is provided in the middle of the top of the piston 35. The movable rod 34 is slidably connected in the circular groove 331, which is conducive to the stable upward and downward movement of the piston 35 and can also make the force of multiple adjusting springs 36 uniform.

[0047] Furthermore, an annular limit block 340 is provided on the outer wall of the movable rod 34 near the bottom to prevent the movable rod 34 from moving upward excessively, thereby preventing the piston 35 from over-squeezing the multiple adjustment springs 36 and preventing the adjustment springs 36 from being damaged by excessive compression.

[0048] Furthermore, a mounting bracket 47 is provided at the bottom of the differential pressure sensor 41 , and the mounting bracket 47 is detachably connected to the top of the oil tank 1 by bolts, so that the position of the differential pressure sensor 41 is fixed.

[0049] Furthermore, the pressure compensating pump 40 and the pressure difference sensor 41 are electrically connected to the controller 42 through wires respectively. The controller 42 receives the detection signal of the pressure difference sensor 41 and controls the start and stop of the pressure compensating pump 40 .

[0050] When the high-efficiency hydraulic oil pump pressure maintaining device of this embodiment is in use, the hydraulic oil pump 2 is turned on to allow the oil in the oil tank 1 to be transported to the hollow column 30 through the oil delivery pipe 5. The oil pushes the piston 35 to move upward, adjusts the exposure degree of the oil outlet pipe 31, and provides the required pressure to the system through the oil outlet pipe 31. During system operation, the pressure difference sensor 41 monitors the pressure difference between the output of the hydraulic oil pump 2 and the output of the mechanical pressure regulator 3 in real time. If a pressure difference is detected, the controller 42 instructs the pressure compensation pump 40 to start, and inputs oil into the oil outlet pipe 31 through the pressure compensation pipe 43, so as to dynamically adjust the pressure in the system to offset the pressure fluctuation caused by load changes. According to the real-time operation of the system, the distance between the annular pressure plate 330 and the piston 35 can continue to be finely adjusted by adjusting the screw 33 to optimize the stability of the system pressure.

[0051] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-efficiency hydraulic oil pump pressure maintaining device, comprising an oil tank (1), a hydraulic oil pump (2) being arranged on the top of the oil tank (1), an input end of the hydraulic oil pump (2) being connected to the oil tank (1) via a first oil extraction pipe, and characterized in that: A mechanical pressure regulator (3) and a dynamic pressure compensation unit (4) are also provided at the top of the oil tank (1). The mechanical pressure regulator (3) comprises a hollow column (30). A first connection end (300) is provided at the front end of the outer wall of the hollow column (30) and close to the bottom. The output end of the hydraulic oil pump (2) is connected to the first connection end (300) via an oil delivery pipe (5). An internally threaded fixed tube (32) is provided at the top of the hollow column (30). An adjusting screw (33) is connected to the internal thread of the internally threaded fixed tube (32). The bottom end of the adjusting screw (33) passes through the top of the hollow column (30); the bottom end of the outer wall of the adjusting screw (33) is rotatably connected to an annular pressure plate (330); a plurality of adjusting springs (36) arranged in an annular array are provided at the bottom of the annular pressure plate (330); the bottom ends of the plurality of adjusting springs (36) are commonly fixedly connected to a piston (35); an oil outlet pipe (31) is provided at the middle and lower part of the rear end of the outer wall of the hollow column (30); the front end of the oil outlet pipe (31) passes through the outer wall of the hollow column (30) and is connected to the piston (35). The outer wall of the oil outlet pipe (31) is tightly fitted, a second connecting end (310) is provided at the middle of the top of the outer wall of the oil outlet pipe (31), and a third connecting end (311) is provided at the top of the outer wall of the oil outlet pipe (31) and near the rear end. The dynamic pressure compensation unit (4) comprises a pressure compensation pump (40), a pressure difference sensor (41) and a controller (42). The input end of the pressure compensation pump (40) is connected to the oil tank (1) through a second oil pumping pipe, and the output end of the pressure compensation pump (40) is provided with a pressure compensation pipe (43). The pressure compensation pipe ( A one-way valve (44) is provided on the oil delivery pipe (5), an output end of the pressure compensation pipe (43) is connected to the second connection end (310), two ends of the differential pressure sensor (41) are respectively connected to a first liquid guide pipe (45) and a second liquid guide pipe (46), a fourth connection end (50) is provided on the oil delivery pipe (5), an end of the first liquid guide pipe (45) away from the differential pressure sensor (41) is connected to the fourth connection end (50), and an end of the second liquid guide pipe (46) away from the differential pressure sensor (41) is connected to the third connection end (311).

2. The high-efficiency hydraulic oil pump pressure maintaining device according to claim 1, characterized in that: A mounting base (38) is provided at the bottom of the hollow column (30), and the mounting base (38) is detachably connected to the top of the oil tank (1) by means of bolts.

3. The high-efficiency hydraulic oil pump pressure maintaining device according to claim 1, characterized in that: An annular support block (301) is provided on the inner wall of the hollow column (30), the annular support block (301) is close to the top of the first connecting end (300), and the annular support block (301) is located below the oil outlet pipe (31), and the top of the annular support block (301) abuts against the bottom of the piston (35).

4. The high-efficiency hydraulic oil pump pressure maintaining device according to claim 1, characterized in that: The outer wall of the internally threaded fixing tube (32) is threadedly connected with a fastening bolt (37), and the threaded end of the fastening bolt (37) abuts against the outer wall of the adjusting screw rod (33).

5. The high-efficiency hydraulic oil pump pressure maintaining device according to claim 1, characterized in that: A circular groove (331) is formed at the bottom of the adjusting screw rod (33), and a movable rod (34) is formed at the middle of the top of the piston (35). The movable rod (34) is slidably connected to the circular groove (331).

6. The high-efficiency hydraulic oil pump pressure maintaining device according to claim 5, characterized in that: An annular limiting block (340) is provided on the outer wall of the movable rod (34) and close to the bottom.

7. The high-efficiency hydraulic oil pump pressure maintaining device according to claim 1, characterized in that: A mounting bracket (47) is provided at the bottom of the differential pressure sensor (41), and the mounting bracket (47) is detachably connected to the top of the oil tank (1) by means of bolts.

8. The high-efficiency hydraulic oil pump pressure maintaining device according to claim 1, characterized in that: The pressure compensation pump (40) and the pressure difference sensor (41) are electrically connected to the controller (42) via wires, respectively.

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