High-stability hydraulic system

Abstract

The utility model relates to the technical field of hydraulic systems, in particular to a high-stability hydraulic system which comprises a first control valve bank, a hydraulic pump and an oil tank which are sequentially arranged from top to bottom, and the oil tank is a metal oil tank and connected with the hydraulic pump and the first control valve bank through pipelines. The first control valve group is arranged above the oil tank through the rack, the periphery of the rack is open, a partition plate is arranged at the top of the rack, the first control valve group is arranged above the partition plate, and a heat dissipation space is formed by the first control valve group and the partition plate; a mounting space is formed by the rack and the top of the oil tank, and a motor and a fan for cooling the motor are arranged in the mounting space; an energy accumulator is arranged on the side wall, close to the hydraulic pump, of the oil tank through a mounting support and connected with an outlet pipeline of the hydraulic pump. The hydraulic system can solve the technical problems that an existing hydraulic system is poor in stability, poor in heat dissipation and large in overall layout occupied space.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, in particular to a high-stability hydraulic system. Background Art

[0002] The hydraulic station is a hydraulic source system composed of a hydraulic pump, motor, oil tank, directional valve, throttle valve, relief valve, etc. When in use, the motor drives the oil pump to rotate, and the pump draws oil from the oil tank and pumps oil, converting mechanical energy into the pressure energy of hydraulic oil. The hydraulic oil is adjusted in direction, pressure and flow by the hydraulic valve through the integrated block (or control valve group) and then transmitted to the oil cylinder or oil motor of the hydraulic machinery through the external pipeline, thereby controlling the action of the hydraulic machine.

[0003] Our company recently purchased a hydraulic station for machine tool processing, which frequently triggered alarms during use. This was primarily due to the fact that fluids are susceptible to friction and resistance during transportation, causing pressure fluctuations in the system. These fluctuations directly affected the movement of the actuator cylinders, which in turn caused machine tool alarms and disrupted normal processing. Currently, accumulators are commonly used for pressure regulation in hydraulic stations. Accumulators convert system energy into compressed or potential energy and store it. When needed, these energy is released as hydraulic or pneumatic pressure, replenishing the system and thus stabilizing the hydraulic system's pressure.

[0004] For example, Chinese utility model patent publication number CN217107613U provides an energy-saving and environmentally friendly hydraulic station. This system utilizes a three-way valve installed on the oil pump's outlet pipe. The other two ends of the valve are connected to the oil inlet of the manifold block and an accumulator via pipes. The accumulator stabilizes system pressure, reducing frequent motor starts and achieving energy savings. However, during the hydraulic station renovation, our company discovered that while adding an accumulator stabilized system pressure, the solenoid valve still had a high failure rate. Analysis revealed that the hydraulic system's oil tank was a plastic tank with poor heat dissipation, resulting in high oil temperatures and susceptible to damage to the internal components of the solenoid valve. During use, our company experienced excessive scrapping of damaged solenoid valves, significantly increasing the company's acquisition costs.

[0005] In summary, our company has comprehensively transformed and upgraded the hydraulic system currently in use, providing a high-stability hydraulic system that runs smoothly, consumes low energy, has good heat dissipation, and is easy to install and maintain. In addition, the system has a reasonable spatial layout, occupies little external horizontal space, and can be fully adapted to the placement area of ​​the machine tool, with good overall space utilization. Utility Model Content

[0006] The utility model provides a high-stability hydraulic system, which can solve the technical problems of poor stability, poor heat dissipation and large space occupied by the overall layout of the existing hydraulic system.

[0007] This application provides the following technical solutions:

[0008] A high-stability hydraulic system includes a first control valve group, a hydraulic pump and an oil tank arranged in sequence from top to bottom, the oil tank being a metal oil tank, connected to the hydraulic pump and the first control valve group by pipelines; the first control valve group is arranged above the oil tank through a frame, the frame is open on all sides, a partition is provided on the top of the frame, the first control valve group is arranged above the partition, and forms a heat dissipation space with the partition; the top of the frame and the oil tank constitute an installation space, and a motor and a fan for cooling the motor are provided in the installation space; an accumulator is provided on the side wall of the oil tank near the hydraulic pump through a mounting bracket, and the accumulator is connected to the outlet pipeline of the hydraulic pump.

[0009] Beneficial effects:

[0010] 1. Reasonable spatial layout: The first control valve group, hydraulic pump, oil tank and other components are arranged along the vertical space, which reduces the area occupied by the hydraulic station in the longitudinal direction. The machine tool body is large in size. By optimizing the layout of the hydraulic station, it is more in line with the placement area of ​​the machine tool, and the overall space utilization is good.

[0011] 2. Good heat dissipation: The original plastic tank is replaced with a metal oil tank, which improves the heat dissipation. The frame is opened all around to facilitate heat dissipation of the motor. A fan is installed in the installation space of the frame, and a partition is installed on the top of the frame. The partition can isolate the control valve group above. Especially when the fan is started, the heat is mainly dissipated from the four sides of the frame, which can reduce the impact of motor heat on other components, especially the control valve group.

[0012] 3. System pressure stability: By installing an accumulator on the outlet pipe of the hydraulic pump, when the system pressure increases, the gas pressure in the accumulator will also increase, thereby compressing the excess liquid back into the tank, restoring the system pressure to the set value; when the system pressure drops, the gas pressure in the accumulator will also drop. When the pressure in the tank drops to a certain value, the liquid will automatically enter the system, thus maintaining the system pressure stable. In addition, the installation of the accumulator reduces the number of times the hydraulic pump is started to replenish pressure, giving the hydraulic oil ample time to dissipate heat naturally, which helps to further improve the heat dissipation performance of the system.

[0013] 4. Easy to disassemble and maintain: The first control valve group is used to connect to the actuator cylinder on the machine tool through pipelines. By arranging the first control valve group at the top, it is convenient to install the connecting pipelines and also convenient for subsequent maintenance. In addition, the first control valve group is not in direct contact with the partition, but forms a heat dissipation space with it, which can further reduce the influence of the heating elements below on the control valve group, which is beneficial to prolonging the service life of the valve group.

[0014] Further, the second control valve group is arranged inside the machine tool, and the outlet pipeline of the hydraulic pump is connected with the first branch pipeline and the second branch pipeline through a three-way pipe, the first branch pipeline is connected with the first control valve group, and the second branch pipeline is connected with the second control valve group.

[0015] Beneficial effects: by connecting the two control valve groups with one oil tank, the original two hydraulic stations inside and outside the machine tool are combined into one, which is beneficial to reducing the number of motors and hydraulic pumps and energy consumption; during use, the two branch pipelines supply liquid to the first control valve group, the second control valve group and the corresponding executing elements respectively, for example, the first control valve group is an external valve group, which is mainly used for controlling the actions of tool clamps and the like of the machine tool, and the second control valve group is an internal valve group of the machine tool, which is mainly used for controlling the actions of lifting, lowering, rotating of the tray and clamping and loosening of the main shaft tool.

[0016] Further, the pressure of the second branch pipeline is greater than that of the first branch pipeline, and the outlet end of the first branch pipeline is provided with a pressure reducing valve.

[0017] Beneficial effects: since the two control valve groups are used for controlling different executing elements, the pressures required by the two control valve groups are different, the pressure of the second branch pipeline is greater than that of the first branch pipeline, the pressure of the total pipeline is set to the pressure required by the second branch pipeline, and then the pressure is reduced to the pressure required by the first branch pipeline through the pressure reducing valve, so that the control mode is simpler, and the number of regulating valves can be reduced.

[0018] Further, the first control valve group and the second control valve group include at least five electromagnetic valves, the oil outlet and the oil return of the electromagnetic valves of the first control valve group are directed to the outside for being connected with executing cylinders, and the second control valve group is vertically arranged on the inner wall of the machine tool through a valve group support.

[0019] Beneficial effects: the arrangement positions of the first control valve group and the second control valve group are beneficial to installing the connecting pipelines.

[0020] Further, the partition plate is in a tray structure.

[0021] Beneficial effects: the tray structure can be used as a shelf, the hydraulic station of the application is mainly used for machine tools, the number of valve group pipelines is large, and the number of installed components is large, so the partition plate can be used as a shelf for placing the installed components.

[0022] Further, the mounting support is welded on the outer wall of the oil tank, and the energy accumulator is arranged on the mounting support; the side wall of the oil tank is further provided with a connecting hoop, and the connecting hoop is connected with the energy accumulator.

[0023] Beneficial effects: the energy accumulator used in the application has a large volume and weight, and the arrangement of the connecting hoop is beneficial to ensuring the stability of the installation of the energy accumulator.

[0024] Further, the bottom of the oil tank is further provided with universal wheels.

[0025] Beneficial effects: The hydraulic system of the present application is an external hydraulic station, and universal wheels are provided at the bottom of the oil tank to facilitate the movement of the hydraulic station.

[0026] Furthermore, an oil inlet is provided at the top of the oil tank, an oil outlet is provided at the bottom of the oil tank, and sealing plugs are provided on both the oil inlet and the oil outlet.

[0027] Beneficial effects: The oil inlet is convenient for adding hydraulic oil, and the oil drain port is convenient for draining waste oil from the oil tank.

[0028] Furthermore, an oil level mirror is provided on the side wall of the oil tank.

[0029] Beneficial effect: It is helpful to display the oil level of the hydraulic oil inside the hydraulic station tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of the hydraulic system;

[0031] Figure 2 Schematic diagram of the structure of the second control valve group;

[0032] Figure 3 Schematic diagram of the piping connection of the hydraulic system. DETAILED DESCRIPTION

[0033] The following is further described in detail through specific implementation methods:

[0034] The marks in the drawings of the specification include: first control valve group 1, pressure reducing valve 11, hydraulic pump 2, oil tank 3, universal wheel 31, oil inlet 32, oil drain port 33, oil level mirror 34, frame 4, partition 41, mounting plate 42, motor 5, fan 6, accumulator 7, mounting bracket 71, connecting hoop 72, second control valve group 8, valve group bracket 81, outlet pipeline 100, first branch pipe 101, second branch pipe 102.

[0035] Example 1

[0036] like Figure 1 As shown, a high-stability hydraulic system includes a first control valve group 1, a hydraulic pump 2 and an oil tank 3 arranged in sequence from top to bottom. In this embodiment, the oil tank 3 is a metal oil tank, and the oil tank 3 is connected to the hydraulic pump 2 and the first control valve group 1 through pipelines; specifically, the oil tank 3 is a square structure, and a universal wheel 31 is provided at the bottom of the oil tank 3, which is convenient for moving the hydraulic station to the vicinity of the machine tool to supply liquid to the execution cylinder on the machine tool; an oil inlet 32 ​​is provided at the top of the oil tank 3, and an oil drain port 33 is provided at the bottom of the oil tank 3, and sealing plugs are provided on the oil inlet 32 ​​and the oil drain port 33. An oil level mirror 34 for displaying the liquid level of the oil tank 3 is also provided on the side wall of the oil tank 3.

[0037] The first control valve group 1 is arranged above the oil tank 3 through the frame 4, the bottom of the frame 4 is fixed on the top of the oil tank 3 through angle steel and occupies at least two-thirds of the position of the top of the oil tank 3, the frame 4 is open around, the top of the frame 4 is connected with the baffle 41 through bolts, the first control valve group 1 is arranged above the baffle 41 and forms a heat dissipation space with the baffle 41; specifically, the first control valve group 1 is arranged above the baffle 41 through the mounting plate 42 in inverted U-shaped structure, more preferably, the baffle 41 is in tray type structure and can be used as a storage rack when disassembling parts.

[0038] The top of the frame 4 and the oil tank 3 constitutes an installation space, the motor 5 and the fan 6 for heat dissipation of the motor 5 are arranged in the installation space; specifically, the fan 6 is located on one side of the motor 5, the output shaft of the motor 5 is connected with the hydraulic pump 2, the hydraulic pump 2 is located on the other side of the top of the oil tank 3, the inlet of the hydraulic pump 2 is connected with the inside of the oil tank 3 through pipeline, and the outlet of the hydraulic pump 2 is connected with the first control valve group 1 through outlet pipeline 100.

[0039] The oil tank 3 is provided with the accumulator 7 on the side wall close to the hydraulic pump 2 through the mounting bracket 71, the accumulator 7 is connected with the outlet pipeline 100 of the hydraulic pump 2 and is used for stabilizing the pressure of the system; specifically, the mounting bracket 71 is welded on the outer side wall of the oil tank 3 in the embodiment, the accumulator 7 is arranged on the mounting bracket 71, and the connecting hoop 72 is fixed on the side wall of the oil tank 3 through bolts, the connecting hoop 72 is connected with the accumulator 7; more preferably, the accumulator 7 adopts nitrogen accumulator in the embodiment.

[0040] In the embodiment, the hydraulic pump 2 and the accumulator 7 are arranged on one side of the oil tank 3, the motor 5 and the fan 6 are located in the installation space of the frame 4 and are arranged on the other side of the oil tank 3, which is beneficial to guarantee the stability of the overall structure of the hydraulic station; the first control valve group 1 is arranged above the motor 5 through the frame 4 and the mounting plate 42, and the hydraulic pump 2 is located below the side of the first control valve group 1, which is convenient for connecting the hydraulic pump 2 and the first control valve group 1 through pipeline; the first control valve group 1 is arranged at the uppermost of the entire hydraulic station, which is convenient for connecting with the executing element on the machine tool, is convenient for maintenance, and is located at the uppermost, which can also reduce the influence of the lower heating elements.

[0041] As Figures 2-3As shown, this embodiment also includes a second control valve group 8, which is arranged inside the machine tool. The outlet pipeline 100 of the hydraulic pump 2 forms a first branch pipe 101 and a second branch pipe 102 through a tee. The first branch pipe 101 is connected to the first control valve group 1, and the second branch pipe 102 is connected to the second control valve group 8; the pressure of the second branch pipe 102 is greater than the pressure of the first branch pipe 101, and a pressure reducing valve 11 is provided at the outlet end of the first branch pipe 101. Specifically, the pressure reducing valve 11 is provided at the inlet end of the first control valve group 1, and the pressure reducing valve 11 includes a pressure gauge to facilitate displaying the pressure of the pipeline connected to the first control valve group 1.

[0042] Specifically, the first control valve group 1 and the second control valve group 8 include at least five groups of solenoid valves. The oil outlet and return port of the solenoid valves of the first control valve group 1 face outward for connection to the actuator cylinder. The second control valve group 8 is vertically mounted on the inner wall of the machine tool via a valve group bracket 81. During use, two branch pipes respectively supply fluid to the first control valve group 1, the second control valve group 8, and the corresponding actuators. For example, the first control valve group 1 is an external valve group, primarily used to control the movement of the machine tool's fixtures, etc., while the second control valve group 8 is an internal valve group, primarily used to control the movement of the pallet, such as raising, lowering, and rotating, and the clamping and loosening of the spindle tool. The machine tool used in this embodiment is primarily used for processing heavy parts.

[0043] In summary, the present application provides a high-stability hydraulic system, which has stable operation, low energy consumption, good heat dissipation, and easy installation and maintenance; and has a reasonable spatial layout, occupies little external horizontal space, can be fully adapted to the placement area of ​​the machine tool, and has good overall space utilization.

[0044] The above is only an embodiment of the present invention. The present invention is not limited to the field involved in this implementation case. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A high stability hydraulic system, characterized in that: The invention comprises a first control valve group, a hydraulic pump and an oil tank which are arranged in sequence from top to bottom. The oil tank is a metal oil tank which is connected to the hydraulic pump and the first control valve group through pipelines. The first control valve group is arranged above the oil tank through a frame. The frame is open on all sides. A partition is provided on the top of the frame. The first control valve group is arranged above the partition to form a heat dissipation space with the partition. The top of the frame and the oil tank constitute an installation space. A motor and a fan for cooling the motor are provided in the installation space. An accumulator is provided on the side wall of the oil tank near the hydraulic pump through a mounting bracket. The accumulator is connected to the outlet pipeline of the hydraulic pump.

2. A high-stability hydraulic system according to claim 1, characterized in that: It also includes a second control valve group, which is arranged inside the machine tool. The outlet pipeline of the hydraulic pump forms a first branch pipe and a second branch pipe through a tee. The first branch pipe is connected to the first control valve group, and the second branch pipe is connected to the second control valve group.

3. A high-stability hydraulic system according to claim 2, characterized in that: The pressure of the second branch pipe is greater than the pressure of the first branch pipe, and a pressure reducing valve is provided at the outlet end of the first branch pipe.

4. A high-stability hydraulic system according to claim 3, characterized in that: The first control valve group and the second control valve group include at least 5 groups of solenoid valves. The solenoid valve oil outlet and oil return port of the first control valve group face outward for connection with the actuator cylinder; the second control valve group is vertically arranged on the inner wall of the machine tool through the valve group bracket.

5. A high-stability hydraulic system according to any one of claims 1 to 4, characterized in that: The partition is a tray-type structure.

6. A high-stability hydraulic system according to claim 5, characterized in that: The mounting bracket is welded to the outer side wall of the oil tank, and the accumulator is arranged on the mounting bracket; a connecting hoop is also arranged on the side wall of the oil tank, and the connecting hoop is connected to the accumulator.

7. A high-stability hydraulic system according to claim 6, characterized in that: The bottom of the oil tank is also provided with universal wheels.

8. A high-stability hydraulic system according to claim 7, characterized in that: The top of the oil tank is provided with an oil inlet, the bottom of the oil tank is provided with an oil outlet, and both the oil inlet and the oil outlet are provided with sealing plugging covers.

9. A high-stability hydraulic system according to claim 8, characterized in that: An oil level mirror is also provided on the side wall of the oil tank.

Images