CN213744211U - Four-cylinder synchronous hydraulic system for speed regulation valve control - Google Patents
Four-cylinder synchronous hydraulic system for speed regulation valve control Download PDFInfo
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- CN213744211U CN213744211U CN202022271849.6U CN202022271849U CN213744211U CN 213744211 U CN213744211 U CN 213744211U CN 202022271849 U CN202022271849 U CN 202022271849U CN 213744211 U CN213744211 U CN 213744211U
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Abstract
The utility model provides a synchronous hydraulic system of speed governing valve control four cylinders, the oil tank comprises an oil tank, be provided with pump package and the valves that are used for extracting the inside oil of oil tank on the oil tank, the pump package output links to each other with the valves input, is provided with the hydro-cylinder between valves and the pump package, and the valves output lets in inside the oil tank, the valves includes a plurality of bridge type oil circuits of organizing, the bridge type oil circuit includes governing valve and a plurality of check valve, and is a plurality of the check valve input in proper order forms with the output series connection the first oil circuit of bridge type oil circuit, the lower half oil circuit and the first oil circuit of bridge type oil circuit are symmetrical, first oil circuit links to each other with the hydro-cylinder, and the lower half oil circuit links to each other with the oil tank, and first oil circuit and lower half oil circuit all establish ties with the governing valve. The utility model discloses an adopt governing valve, check valve bridge oil circuit to control hydro-cylinder output, withdrawal respectively, every hydro-cylinder stretches out that withdrawal speed is adjustable, overcomes the synchronous error that hydro-cylinder precision, pipeline pressure loss arouse.
Description
Technical Field
The utility model relates to a laser cutting machine hydraulic pressure technical field especially relates to a synchronous hydraulic system of governing valve control four-cylinder.
Background
The workbench of the laser cutting machine tool is a device for transferring cut plates, a four-cylinder synchronous lifting hydraulic system is adopted, and the four-cylinder synchronous hydraulic system is required to have stronger unbalance loading resistance due to large area and heavy load of the workbench. Generally, the error of synchronization of four cylinders is required to be less than 5mm under the condition of 500kg of absolute unbalance loading.
The existing hydraulic system mostly adopts a one-inlet four-outlet synchronous motor to control four cylinders to be synchronous, has high synchronous precision, but has weak unbalance loading resistance, places strict requirements on workpieces, has the defects of high cost, weak unbalance loading resistance and inconvenient use, and actually tests that the error of four-cylinder synchronization is less than 8mm under the condition of 500kg of absolute unbalance loading. The four cylinders are controlled to be synchronous in a closed-loop mode by adopting each oil cylinder proportional valve and a displacement sensor, unbalance loading resistance and high synchronization precision are achieved, but an electric control system is complex, the requirement on oil cleanliness is high, and equipment purchasing and maintenance cost is high.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome the defect that prior art exists, the utility model provides a synchronous hydraulic system of governing valve control four-cylinder makes the hydro-cylinder constant speed stretch out, retract.
In order to solve the technical problem, the utility model discloses a technical scheme is: a four-cylinder synchronous hydraulic system controlled by a speed regulating valve comprises an oil tank, wherein a pump group and a valve group for pumping oil in the oil tank are arranged on the oil tank, the output end of the pump group is connected with the input end of the valve group, an oil cylinder is arranged between the valve group and the pump group, the output end of the valve group is communicated with the inside of the oil tank,
the valve bank comprises a plurality of groups of bridge-type oil ways, each bridge-type oil way comprises a speed regulating valve and a plurality of one-way valves, the input ends of the one-way valves are sequentially connected with the output in series to form an upper half oil way of each bridge-type oil way, a lower half oil way of each bridge-type oil way is symmetrical to the upper half oil way, the upper half oil way is connected with an oil cylinder, the lower half oil way is connected with an oil tank, and the upper half oil way and the lower half oil way are both connected with the speed regulating valves in series.
Furthermore, the valve group also comprises an electromagnetic directional valve, the electromagnetic directional valve is arranged at the output end of the pump group and the output end of the bridge oil way, and the electromagnetic directional valve is provided with an electromagnet Y1 and an electromagnet Y2.
Furthermore, a hydraulic control one-way valve is further arranged between the oil cylinder and the bridge type oil way, the output end of the hydraulic control one-way valve is connected with the oil cylinder, and the input end of the hydraulic control one-way valve is connected with the bridge type oil way.
Further, the pump unit comprises a motor and a gear pump, wherein the motor is arranged on the oil tank and connected with the gear pump for controlling the operation of the gear pump.
Further, an oil suction oil filter is arranged in the oil tank and connected with the input end of the gear pump.
Furthermore, an oil return filter is arranged on the oil tank and is connected with the output end of the bridge type oil way.
Further, the valve group also comprises a safety valve used for limiting the highest use pressure of the system, and the safety valve is respectively communicated with the output end of the gear pump and the input end of the return oil filter.
Further, the speed regulating valve controls the four-cylinder synchronous hydraulic system to comprise three modes of extending, retracting and stopping;
stretching out: the motor drives the gear pump, the electromagnet of the electromagnetic directional valve is electrified, hydraulic oil discharged by the gear pump flows to the lower cavity of the oil cylinder through the electromagnetic directional valve, the lower half oil way, the speed regulating valve, the upper half oil way and the hydraulic control one-way valve in sequence, the oil cylinder extends out, and the hydraulic oil discharged by the upper cavity of the oil cylinder returns to the oil tank through the electromagnetic directional valve and the return oil filter;
retracting: the motor drives the gear pump, an electromagnet Y1 of the electromagnetic reversing valve is electrified, hydraulic oil discharged by the gear pump flows to the upper cavity of the oil cylinder through the electromagnetic reversing valve, the hydraulic control one-way valve is opened reversely, the oil cylinder retracts, and the hydraulic oil discharged by the lower cavity of the oil cylinder sequentially passes through the hydraulic control one-way valve, the upper half oil way, the speed regulating valve, the lower half oil way, the electromagnetic reversing valve and the return oil filter and return oil tank;
stopping: when the motor stops, the electromagnet of the electromagnetic reversing valve loses power and returns to the middle position, the hydraulic control one-way valve is closed, and the oil cylinder stops.
Furthermore, the device is used for controlling the output and retraction of the oil cylinders, the extending and retracting speed of each oil cylinder is adjustable, the synchronization error caused by the precision of the oil cylinder and the pressure loss of a pipeline is overcome, the unbalance loading resistance is strong, the synchronization precision is high, and the requirement of the working condition is met.
Compared with the prior art, the beneficial effects of the utility model include: four groups of speed regulating valves and one-way valve bridge-type oil paths are adopted to respectively control the output and retraction of four oil cylinders, the extending and retracting speed of each oil cylinder is adjustable, the synchronous errors caused by the precision of the oil cylinders and the pressure loss of pipelines are overcome, the unbalance loading resistance is strong, the synchronous precision is high, and the working condition requirements are met; the screw cartridge valve is adopted, the structure is compact, the electrical control is simple and convenient, and the equipment cost is low; the system has general requirements on oil, convenient use and low maintenance cost. The actual test shows that the four-cylinder synchronization error is less than 2mm under the condition of 500kg of absolute unbalance loading.
Drawings
The disclosure of the present invention is explained with reference to the drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:
fig. 1 schematically shows a schematic structural diagram of a four-cylinder synchronous hydraulic system controlled by a speed regulating valve according to an embodiment of the present invention.
Fig. 2 schematically shows an overall schematic diagram of a four-cylinder synchronous hydraulic system controlled by a speed valve according to an embodiment of the present invention.
Fig. 3 schematically shows a valve group schematic diagram of a four-cylinder synchronous hydraulic system controlled by a speed regulating valve according to an embodiment of the present invention.
Reference numbers in the figures: 1-oil tank, 2-oil suction filter, 3-gear pump, 4-motor, 5-oil return filter, 6-oil cylinder, 7-valve bank, 8-safety valve, 9-electromagnetic directional valve, 10-one-way valve, 11-speed regulating valve and 12-hydraulic control one-way valve.
Detailed Description
It is easily understood that, according to the technical solution of the present invention, a plurality of alternative structural modes and implementation modes can be proposed by those skilled in the art without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present invention, and should not be considered as limiting or restricting the technical solutions of the present invention in their entirety or in any other way.
According to an embodiment of the present invention, as shown in fig. 1 to 3, a four-cylinder synchronous hydraulic system controlled by a governor valve comprises a body of an oil tank 1, a motor 4, a valve block and a return oil filter 5 are fixed on an upper end surface of the oil tank 1, a valve set 7 is arranged in the valve block, the valve set 7 comprises four sets of bridge-type oil paths, each bridge-type oil path comprises a governor valve 11 and four check valves 10, two check valves 10 are sequentially connected in series with an output to form an upper half oil path of the bridge-type oil path, a lower half oil path of the bridge-type oil path also comprises two check valves 10, two check valves 10 are sequentially connected in series with an output to form a lower half oil path of the bridge-type oil path, the upper half oil path and the lower half oil path are symmetrically arranged, the input end and the output end of the upper half oil path and the output end of the lower half oil path are respectively connected with the output end and the input end of the governor valve 11, the upper half oil path is connected with an oil cylinder 6, the lower half oil path is connected with the oil tank 1. A hydraulic control one-way valve 12 is arranged between the bridge type oil way and the oil cylinder 6, the input end of the hydraulic control one-way valve 12 is connected with the bridge type oil way, and the output end of the hydraulic control one-way valve 12 is connected with the input end of the oil cylinder 6. The output end of the bridge oil circuit is connected with the return oil filter 5 and is communicated into the oil tank 1. The oil cylinder 6 is communicated with a gear pump 3 positioned in the oil tank 1, an oil suction oil filter 2 is connected to the input end of the gear pump 3, the gear pump 3 is connected with a motor 4, and the gear pump 3 is controlled by the motor 4 to operate, so that oil is sucked into the oil cylinder 6 from the inside of the oil tank 1.
The synchronous hydraulic system is also provided with an electromagnetic reversing valve 9, the electromagnetic reversing valve 9 comprises an electromagnet Y1 and an electromagnet Y2, the electromagnet Y1 is respectively positioned at the output end of the gear pump 3, the electromagnet Y2 is positioned at the output end of the bridge type oil circuit, four ports on the electromagnetic reversing valve 9 are respectively an A port, a P port, a B port and a T port, the A port and the P port are respectively positioned on the oil circuit from the gear pump 3 to the oil cylinder 6, and the B port and the T port are respectively positioned on the oil circuit from the bridge type oil circuit to the oil return filter 5. The motor 4 and the electromagnetic directional valve 9 are controlled by an independent circuit, so that the motor 4 and the electromagnetic directional valve 9 can not only run simultaneously, the oil cylinder 6 is positioned in the workbench of the laser cutting machine tool, the four-cylinder synchronous hydraulic system controlled by the speed regulating valve is controlled by the motor 4 and the electromagnetic directional valve 9, and the oil cylinder 6 can have different motion states, so that the workbench of the laser cutting machine tool can realize different functions.
A safety valve 8 for defining the maximum service pressure of the system is also provided in the synchronous hydraulic system, the safety valve 8 communicating with the output of the gear pump 3 and with the input of the return oil filter 5, respectively.
The gear pump 3 has the discharge capacity of 20ml/r, and the motor 4 has the discharge capacity of 5.5 kw; the return oil filter 5 ensures the cleanliness of system oil.
The working principle is as follows:
the speed of the extending and retracting of the oil cylinder 6 is controlled by adopting a pressure compensation speed regulating valve 11, so that the oil cylinder 6 is controlled to be synchronous, and the safety valve 8 limits the highest service pressure of the system. For the convenience of explaining the working principle of the present invention, the input end of the check valve 10, the pilot operated check valve 12 and the speed regulating valve 11 is 1, the output end thereof is 2, (1 → 2) indicates the flow direction of the oil, and the control port of the pilot operated check valve 12 is 3 ports.
1. Stretching out: the motor 4 drives and starts the gear pump 3, the electromagnet Y2 of the electromagnetic directional valve 9 is electrified, hydraulic oil discharged from the gear pump 3 flows to the lower cavity of the oil cylinder 6 through the electromagnetic directional valve 9(P → B), the one-way valve 10(1 → 2), the speed regulating valve 11(1 → 2), the one-way valve 10(1 → 2) and the hydraulic control one-way valve 12(1 → 2), the oil cylinder 6 extends out, and the hydraulic oil discharged from the upper cavity of the oil cylinder 6 returns to the oil tank 1 through the electromagnetic directional valve 9(A → T) and the return oil filter 5. The speed of the extending of the oil cylinder 6 is regulated by a speed regulating valve 11.
2. Retracting: the motor 4 drives and starts the gear pump 3, an electromagnet Y1 of the electromagnetic directional valve 9 is electrified, hydraulic oil discharged from the gear pump 3 passes through the electromagnetic directional valve 9(P → A) to an upper cavity of the oil cylinder 6 and a port 3 of the hydraulic control one-way valve 12, the hydraulic control one-way valve 12(2 → 1) is reversely opened, the oil cylinder 6 retracts, hydraulic oil discharged from a lower cavity of the oil cylinder 6 passes through the hydraulic control one-way valve 12(2 → 1), the one-way valve 10(1 → 2), the speed regulating valve 11(1 → 2), the one-way valve 10(1 → 2), the electromagnetic directional valve 9(B → T) and the return oil filter 5 and returns to the oil tank 1. The retracting speed of the oil cylinder 6 is set by the speed regulating valve 11, and the extending speed and the retracting speed are equal.
3. Stopping: when the motor 4 stops, the electromagnet of the electromagnetic directional valve 9 loses power and returns to the middle position (P → T), the 3 port of the pilot-operated check valve 12 releases pressure, the pilot-operated check valve 12(2 → 1) is closed, and the oil cylinder 6 stops.
The four-cylinder synchronous hydraulic system controlled by the speed regulating valve 11 for lifting the laser cutting machine tool workbench adopts four groups of speed regulating valves 11 and one-way valves 10 to control output and retraction of four oil cylinders 6 respectively, each oil cylinder 6 is adjustable in extending and retracting speed, synchronous errors caused by accuracy of the oil cylinder 6 and pipeline pressure loss are overcome, the unbalance loading resistance is high, and the synchronous accuracy is high to meet working condition requirements (the four-cylinder synchronous error is less than 2mm and far superior to design requirements under the condition of 500kg of absolute unbalance loading in practical tests); the screw cartridge valve is adopted, the structure is compact, the electrical control is simple and convenient, and the equipment cost is low; the system has general requirements on oil, the oil cleanliness is ensured by adopting the return oil filter 5, the use is convenient, and the maintenance cost is low; the speed regulating valve 11 is calibrated in a unified factory according to the highest required flow, so that the field debugging workload can be reduced, and the debugging efficiency can be improved.
The technical scope of the present invention is not limited to the content in the above description, and those skilled in the art can make various modifications and alterations to the above embodiments without departing from the technical spirit of the present invention, and these modifications and alterations should fall within the protection scope of the present invention.
Claims (7)
1. A four-cylinder synchronous hydraulic system controlled by a speed regulating valve comprises an oil tank (1), wherein a pump group and a valve group (7) for pumping oil in the oil tank (1) are arranged on the oil tank (1), the output end of the pump group is connected with the input end of the valve group (7), an oil cylinder (6) is arranged between the valve group (7) and the pump group, the output end of the valve group (7) is communicated into the oil tank (1),
the valve group (7) comprises a plurality of groups of bridge-type oil ways, each bridge-type oil way comprises a speed regulating valve (11) and a plurality of one-way valves (10), the input ends of the one-way valves (10) are sequentially connected with the output ends in series to form the first oil way of each bridge-type oil way, the lower half oil way of each bridge-type oil way is symmetrical to the first oil way, the first oil way is connected with the oil cylinder (6), the lower half oil way is connected with the oil tank (1), and the first oil way and the lower half oil way are connected with the speed regulating valves (11) in series.
2. A speed valve controlled four-cylinder synchronous hydraulic system according to claim 1, characterized in that the valve group (7) further comprises a solenoid directional valve (9), the solenoid directional valve (9) being provided at the output of the pump group and at the output of the bridge oil circuit; the electromagnetic directional valve (9) is provided with an electromagnet Y1 and an electromagnet Y2.
3. The governing valve controlled four-cylinder synchronous hydraulic system according to claim 1, characterized in that a hydraulic control check valve (12) is further arranged between the oil cylinder (6) and the bridge type oil way, the output end of the hydraulic control check valve (12) is connected with the oil cylinder (6), and the input end of the hydraulic control check valve (12) is connected with the bridge type oil way.
4. A governing valve controlled four-cylinder synchronous hydraulic system according to claim 1, characterized in that the pump package includes a motor (4) and a gear pump (3), the motor (4) is disposed on the oil tank (1) and connected to the gear pump (3) for controlling the operation of the gear pump (3).
5. A throttle valve controlled four-cylinder synchronous hydraulic system as defined in claim 4, characterized in that an oil suction filter (2) is further arranged in the oil tank (1), said oil suction filter (2) being connected to the input of a gear pump (3).
6. A throttle valve controlled four cylinder synchronous hydraulic system as defined in claim 1, characterized in that a return oil filter (5) is arranged on the tank (1), said return oil filter (5) being connected to the output of the bridge circuit.
7. A governor valve controlled four-cylinder synchronous hydraulic system according to claim 5, characterized in that the valve block (7) further comprises a safety valve (8) for defining the highest use pressure of the system, the safety valve (8) communicating with the output of the gear pump (3) and with the input of the return oil filter (5), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022271849.6U CN213744211U (en) | 2020-10-13 | 2020-10-13 | Four-cylinder synchronous hydraulic system for speed regulation valve control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022271849.6U CN213744211U (en) | 2020-10-13 | 2020-10-13 | Four-cylinder synchronous hydraulic system for speed regulation valve control |
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| Publication Number | Publication Date |
|---|---|
| CN213744211U true CN213744211U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022271849.6U Active CN213744211U (en) | 2020-10-13 | 2020-10-13 | Four-cylinder synchronous hydraulic system for speed regulation valve control |
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| CN (1) | CN213744211U (en) |
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