Energy storage type pressure maintaining hydraulic station for band sawing machine

Abstract

The utility model discloses a kind of energy storage type pressure maintaining hydraulic stations for band sawing machine, including hydraulic station, hydraulic station has oil pump, three-way, valve block, energy accumulator and oil cylinder;The oil outlet of the oil pump is connected with the import of three-way by pipeline, one-way valve is equipped on the pipeline between oil pump oil outlet and three-way;One outlet of the three-way is connected with the oil inlet of the valve block by pipeline, and the other outlet is connected with the oil inlet of the energy accumulator by pipeline;Valve block is also provided with return oil port, first working oil port and second working oil port.By setting one-way valve between three-way and energy accumulator, and using the parallel connection mode of energy accumulator and main oil circuit, the excess hydraulic oil output by oil pump can be effectively stored, when system pressure drops due to leakage, energy accumulator can release pressure oil instantaneously to compensate, avoid frequent start and stop of oil pump motor, reduce power consumption, solve the problem of high energy consumption of continuous pressure maintaining scheme.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic systems for band saws, specifically to an energy storage and pressure-holding hydraulic station for band saws. Background Technology

[0002] Currently, common hydraulic pressure holding systems for band saws mainly employ two methods: continuous oil supply pressure holding and pressure relief pressure holding. Continuous oil supply pressure holding involves the continuous operation of the oil pump motor on the hydraulic station to compensate for internal system leakage, thereby maintaining cylinder pressure. Although this method has a simple structure, the oil pump needs to operate under high pressure for extended periods, leading to significant energy waste, increased oil temperature, shortened lifespan of hydraulic components, and relatively high operating noise.

[0003] Another pressure relief and pressure maintenance method uses intermittent motor start-stop: when the system pressure reaches the set value, the motor stops working; when the pressure drops to a lower value due to leakage, the motor restarts to replenish the system pressure. Although this method reduces energy consumption to some extent, the frequent start-stop of the motor will generate a large inrush current, affecting the service life of electrical components and even interfering with the workshop power grid.

[0004] In summary, existing hydraulic pressure-holding systems for band saws suffer from problems such as high energy consumption, easy oil temperature rise, short component lifespan, and frequent motor start-stop cycles. Therefore, there is an urgent need for a pressure-holding hydraulic station that can effectively solve these problems while also being energy-efficient, stable, and having a long service life. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing an energy storage type pressure-maintaining hydraulic station for band saws that uses an accumulator for pressure compensation to achieve energy-saving pressure maintenance.

[0006] The technical problem to be solved by this utility model is achieved through the following technical solution: a storage-type pressure-holding hydraulic station for a band saw, comprising a hydraulic station, which has an oil pump, a three-way valve, a valve block, an accumulator and an oil cylinder. The oil pump's inlet is connected to the hydraulic station oil tank of the band saw via a pipeline, and the oil pump's outlet is connected to the inlet of a tee via a pipeline. A check valve is installed on the pipeline between the oil pump's outlet and the tee. One outlet of the tee is connected to the oil inlet of the valve block via a pipeline, and the other outlet is connected to the oil inlet of the accumulator via a pipeline. The valve block is also provided with a return oil port, a first working oil port and a second working oil port. The return oil port of the valve block is connected to the hydraulic station oil tank of the band saw through a pipeline. The first working oil port and the second working oil port of the valve block are respectively connected to the rod chamber and the rodless chamber of the hydraulic cylinder.

[0007] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the energy storage and pressure holding hydraulic station for band saws described above, wherein the one-way valve is a one-way check valve.

[0008] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the energy storage type pressure holding hydraulic station for band saws described above, wherein the energy storage device is a piston type energy storage device.

[0009] Compared with the prior art, the beneficial technical effects of this utility model are: (1) By setting a check valve between the three-way valve and the accumulator, and by using the accumulator and the main oil circuit in parallel, the excess hydraulic oil output by the oil pump can be effectively stored. When the system pressure drops due to leakage, the accumulator can release the pressure oil instantly to compensate, thus avoiding the frequent start and stop of the oil pump motor, reducing power consumption, and solving the problem of excessive energy consumption in the continuous pressure holding scheme.

[0010] (2) The coordinated operation of the valve block and the accumulator can maintain the pressure stability of the rodless chamber of the oil cylinder for a long time. The accumulator can compensate for the micro-leakage of the system in time, ensuring the constant clamping force of the saw during the sawing process, thereby improving the processing accuracy and safety.

[0011] (3) Since the accumulator undertakes most of the pressure holding and compensation tasks of the system, the oil pump motor does not need to work under high pressure for a long time or start and stop frequently. The system pressure fluctuation and hydraulic shock are significantly reduced, which effectively reduces the wear and fatigue of the oil pump, motor and various valve bodies, slows down the aging speed of the oil, extends the service life of the entire hydraulic station to a certain extent, and reduces maintenance costs.

[0012] Furthermore, it avoids the energy loss caused by continuous high-pressure overflow of the oil pump or frequent motor starts, which would otherwise be converted into heat and cause the oil temperature to rise. This energy storage and pressure-holding hydraulic station reduces heat generation at the source, resulting in a lower temperature rise during system operation and stable oil viscosity, further ensuring the smoothness and reliability of system operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0014] Reference numerals: 1. Hydraulic station; 2. Oil pump; 3. Tee; 4. Valve block; 5. Accumulator; 6. Oil cylinder; 7. Check valve. Detailed Implementation

[0015] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0016] Example 1, referring to Figure 1 A storage-type pressure-holding hydraulic station for a band saw includes a hydraulic station 1, which has an oil pump 2, a three-way valve 3, a valve block 4, an accumulator 5, and an oil cylinder 6. The oil inlet of the oil pump 2 is connected to the oil tank of the hydraulic station 1 of the band saw through a pipeline, and the oil outlet of the oil pump 2 is connected to the inlet of the tee 3 through a pipeline. A one-way valve 7 is provided on the pipeline between the oil outlet of the oil pump 2 and the tee 3. The one-way valve 7 is a one-way check valve. One outlet of the tee 3 is connected to the oil inlet of the valve block 4 via a pipeline, and the other outlet is connected to the oil inlet of the accumulator 5 via a pipeline. The valve block 4 is also provided with a return oil port, a first working oil port and a second working oil port. The return oil port of the valve block 4 is connected to the oil tank of the hydraulic station 1 of the band saw through a pipeline. The first working oil port and the second working oil port of the valve block 4 are respectively connected to the rod chamber and the rodless chamber of the hydraulic cylinder 6. The accumulator 5 is a piston-type accumulator 5.

[0017] The working process and principle of the energy storage pressure-holding hydraulic station used in the band saw in Example 1 are as follows: When the oil pump 2 motor starts, the hydraulic oil is pressurized by the oil pump 2, opens the one-way valve 7, and is divided into two paths after passing through the three-way valve 3: one path enters the valve block 4, and the other path enters the piston accumulator 5 until it is filled to the system set pressure. The specific pressure value can be selected according to the usage requirements. This is the conventional technical operation of the hydraulic station 1. Generally, a reversing valve is installed in the valve block 4 to switch the opening and closing of the first working oil port and the second working oil port. When the reversing valve in the valve block 4 is energized, the pressure oil enters the rodless chamber of the cylinder 6 through the first working oil port of the valve block 4, pushing the piston rod to extend and clamp the workpiece. The oil in the rod chamber of the cylinder 6 flows back to the oil tank through the second working oil port and the return oil port of the valve block 4. When pressure holding is required, the pressure oil is sealed in the rodless chamber of cylinder 6. During the pressure holding process, the system inevitably has a small amount of leakage. At this time, the pressure oil stored in the piston accumulator 5 can be released instantly and replenished to the rodless chamber of cylinder 6 through the three-way valve 3 and valve block 4, thereby maintaining the stability of clamping pressure for a long time and avoiding frequent start of oil pump 2 due to compensation for small leakage. It can be seen that the hydraulic station 1 achieves efficient and energy-saving pressure holding function through the synergistic effect of the accumulator 5, the three-way valve 3, and the valve block 4, which significantly reduces the start-stop frequency of the oil pump 2 and the system energy consumption, and extends the service life of hydraulic components.

Claims

1. A storage-type pressure-holding hydraulic station for a band saw, comprising a hydraulic station, characterized in that: The hydraulic station includes an oil pump, a three-way valve, a valve block, an accumulator, and a hydraulic cylinder; The oil pump's inlet is connected to the hydraulic station oil tank of the band saw via a pipeline, and the oil pump's outlet is connected to the inlet of a tee via a pipeline. A check valve is installed on the pipeline between the oil pump's outlet and the tee. One outlet of the tee is connected to the oil inlet of the valve block via a pipeline, and the other outlet is connected to the oil inlet of the accumulator via a pipeline. The valve block is also provided with a return oil port, a first working oil port and a second working oil port. The return oil port of the valve block is connected to the hydraulic station oil tank of the band saw through a pipeline. The first working oil port and the second working oil port of the valve block are respectively connected to the rod chamber and the rodless chamber of the hydraulic cylinder.

2. The energy storage and pressure-holding hydraulic station for a band saw according to claim 1, characterized in that: The one-way valve mentioned is a one-way check valve.

3. The energy storage and pressure-holding hydraulic station for a band saw according to claim 1, characterized in that: The energy accumulator is a piston-type energy accumulator.

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