A new type of hydraulic system applied to large surface grinding machine

Abstract

The utility model discloses a novel hydraulic system applied to large -scale surface grinding machine, first oil port of first oil cylinder and first oil port of second oil cylinder are communicated through oil circuit no.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical hydraulic systems, and particularly relates to a novel hydraulic system for use in large surface grinders, including an oil tank, an air filter, a heater, a temperature sensor, a level gauge, an oil suction filter, a motor, an oil pump one, an oil pump two, a first check valve, and a second check valve. Background Technology

[0002] Currently, the hydraulic systems used in existing large surface grinders suffer from low pressure holding stability in practical applications. This affects the response time of the large surface grinder and ultimately its operating accuracy. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a novel hydraulic system for use in large surface grinders that not only has high pressure holding stability but also fast response time.

[0004] To achieve high pressure holding stability and fast response time in the hydraulic system, this utility model adopts the following specific technical measures: A novel hydraulic system for large surface grinders includes an oil tank, an air filter, a heater, a temperature sensor, a level gauge, a suction filter, a motor, an oil pump one, an oil pump two, a first check valve, and a second check valve. The motor connects to and drives the operation of oil pump one and / or oil pump two. Oil pump one is connected to the oil tank through a first oil circuit equipped with a suction filter. The oil tank is also equipped with an air filter, a heater, a temperature sensor, and a level gauge. The system is characterized by further including a first oil cylinder, a second oil cylinder, an electro-hydraulic directional valve, a first safety valve, a second safety valve, a first relief valve, a second relief valve, a third relief valve, a proportional flow valve, and a buffer valve. The first oil port of the first oil cylinder and the first oil port of the second oil cylinder are connected through an oil circuit one. The second oil port of the first oil cylinder is connected to one end of the A main oil circuit. The second oil port of the second oil cylinder is connected to the B main return oil circuit through an oil circuit two.

[0005] The other end of main oil circuit A is connected to the first port of electro-hydraulic directional valve, one end of main return oil circuit B is connected to the second port of electro-hydraulic directional valve, and the other end of main return oil circuit B is connected to the oil tank.

[0006] The B main return oil circuit is equipped with a first safety valve. The A main oil circuit is connected to the B main return oil circuit through oil circuit three, and oil circuit three is equipped with a second safety valve.

[0007] The third oil port of the electro-hydraulic directional valve is connected to the first oil pump through the fourth oil circuit, and the fourth oil circuit is equipped with the first check valve.

[0008] Oil circuit four is connected to the first port of the proportional flow valve via oil circuit five. The second port of the proportional flow valve is connected to the B main return oil circuit via oil circuit six. Oil circuit six is ​​equipped with a third relief valve. The third port of the proportional flow valve is connected to oil pump two via oil circuit seven. Oil circuit seven is equipped with a second check valve.

[0009] Oil circuit four is connected to the first oil port of the first relief valve through oil circuit eight. The second oil port of the first relief valve is connected to the first oil port of the second relief valve through oil circuit nine. The second oil port of the second relief valve is connected to the B main return oil circuit through oil circuit ten. The third oil port of the second relief valve is connected to oil circuit seven through oil circuit eleven.

[0010] The fourth port of the electro-hydraulic directional valve is connected to the first port of the buffer valve through oil circuit twelve, and the second port of the buffer valve is connected to the B main return oil circuit through oil circuit thirteen.

[0011] The fifth oil port of the electro-hydraulic directional valve is connected to oil circuit seven through oil circuit fourteen.

[0012] This invention uses a PLC to send a signal to a proportional flow valve to set the pressure required for the operation of the first and second hydraulic cylinders. The proportional flow valve can control the movement speed and operating pressure of the first and second hydraulic cylinders by controlling the hydraulic oil flow. The movement direction of the first and second hydraulic cylinders is controlled by energizing an electro-hydraulic directional valve.

[0013] The first, second, and third overflow valves, as well as the buffer valve in the main return oil circuit B, are adjusted by knobs to control the smooth movement of the first and second oil cylinders.

[0014] This utility model has the following advantages: First, a proportional flow valve is used to provide pressure and flow settings for the hydraulic system, which can effectively improve the pressure stability of the hydraulic system and thus ensure the operating accuracy of the large surface grinder.

[0015] Second, a proportional flow valve is used to achieve precise control of the hydraulic system by the PLC.

[0016] Third, a buffer valve is used to provide back pressure to the hydraulic system, making the hydraulic system more stable and safer to operate.

[0017] Fourth, the first safety valve and the second safety valve are used to provide maximum pressure limits for the first and second oil cylinders, so that the hydraulic system can operate smoothly.

[0018] The beneficial effects of this invention are that it not only has high pressure holding stability but also fast response time, which can effectively ensure the running accuracy of large surface grinders. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model.

[0021] In the diagram: 1-oil tank, 2-air filter, 3-heater, 4-temperature sensor, 5-level gauge, 6-suction filter, 7-motor, 81-oil pump one, 82-oil pump two, 9-second check valve, 10-first relief valve, 11-second relief valve, 12-first check valve, 13-proportional flow valve, 14-third relief valve, 15-electro-hydraulic directional valve, 16-buffer valve, 17-second safety valve, 18-first safety valve, 191-first cylinder, 192-second cylinder. Detailed Implementation

[0022] like Figure 1 As shown, a novel hydraulic system for a large surface grinder includes an oil tank 1, an air filter 2, a heater 3, a temperature sensor 4, a level gauge 5, an oil suction filter 6, a motor 7, an oil pump 81, an oil pump 82, a first check valve 12, and a second check valve 9. The motor 7 connects to and drives the operation of oil pump 81 and / or oil pump 82. Oil pump 81 is connected to the oil tank 1 through a first oil circuit equipped with the oil suction filter 6. The oil tank 1 is also equipped with an air filter 2, a heater 3, a temperature sensor 4, and a level gauge 5. The invention is characterized by further comprising a first hydraulic cylinder 191, a second hydraulic cylinder 192, an electro-hydraulic directional valve 15, a first safety valve 18, a second safety valve 17, a first overflow valve 10, a second overflow valve 11, a third overflow valve 14, a proportional flow valve 13, and a buffer valve 16. The first oil port of the first hydraulic cylinder 191 and the first oil port of the second hydraulic cylinder 192 are connected through an oil circuit one. The second oil port of the first hydraulic cylinder 191 is connected to one end of the A main oil circuit. The second oil port of the second hydraulic cylinder 192 is connected to the B main return oil circuit through an oil circuit two.

[0023] Motor 7 controls the operation of oil pump 1 81 and / or oil pump 2 82. Oil pump 1 81 draws hydraulic oil from oil tank 1 into the hydraulic circuit through oil suction filter 6, and the hydraulic system starts working. The hydraulic circuit has a buffering function after motor 7 stops.

[0024] The other end of the main oil circuit A is connected to the first oil port of the electro-hydraulic directional valve 15, one end of the main return oil circuit B is connected to the second oil port of the electro-hydraulic directional valve 15, and the other end of the main return oil circuit B is connected to the oil tank 1.

[0025] The B main return oil circuit is equipped with a first safety valve 18. The A main oil circuit is connected to the B main return oil circuit through oil circuit three, and the oil circuit three is equipped with a second safety valve 17.

[0026] The third oil port of the electro-hydraulic directional valve 15 is connected to the oil pump 81 through the fourth oil circuit, and the fourth oil circuit is equipped with the first check valve 12.

[0027] Oil pump 81 controls the hydraulic oil to be delivered to electro-hydraulic directional valve 15 through the first check valve 12. After being energized, electro-hydraulic directional valve 15 delivers the hydraulic oil to the first cylinder 191 and the second cylinder 192.

[0028] Oil circuit four is connected to the first oil port of proportional flow valve 13 via oil circuit five. The second oil port of proportional flow valve 13 is connected to the B main return oil circuit via oil circuit six. Oil circuit six is ​​equipped with a third relief valve 14. The third oil port of proportional flow valve 13 is connected to oil pump two 82 via oil circuit seven. Oil circuit seven is equipped with a second check valve 9.

[0029] Oil circuit four is connected to the first oil port of the first relief valve 10 through oil circuit eight. The second oil port of the first relief valve 10 is connected to the first oil port of the second relief valve 11 through oil circuit nine. The second oil port of the second relief valve 11 is connected to the B main return oil circuit through oil circuit ten. The third oil port of the second relief valve 11 is connected to oil circuit seven through oil circuit eleven.

[0030] The pressure in the hydraulic system is controlled by the first relief valve 10, the second relief valve 11, and the third relief valve 14. The first relief valve 10, the second relief valve 11, and the third relief valve 14 can protect the stability of the hydraulic system by limiting the maximum pressure of the hydraulic system.

[0031] The fourth oil port of the electro-hydraulic directional valve 15 is connected to the first oil port of the buffer valve 16 through oil circuit twelve, and the second oil port of the buffer valve 16 is connected to the B main return oil circuit through oil circuit thirteen.

[0032] The fifth oil port of the electro-hydraulic directional valve 15 is connected to oil circuit 7 through oil circuit 14.

[0033] The sixth oil port of the electro-hydraulic directional valve 15 can be connected to the oil tank 1 through the return oil circuit.

[0034] The third oil port of the proportional flow valve 13 is connected to the oil tank 1 through the return oil circuit 2.

[0035] The motor's power is specifically 45KW-4P. The displacement of oil pump one and oil pump two is specifically 310L / min. The oil tank volume is specifically 1000L. The proportional flow valve control method is specifically 0-10V. The electro-hydraulic directional valve voltage rating is specifically DC24V.

Claims

1. A novel hydraulic system for use in large surface grinders, comprising an oil tank, an air filter, a heater, a temperature sensor, a level gauge, an oil suction filter, a motor, an oil pump one, an oil pump two, a first check valve, and a second check valve; the motor is connected to and drives the operation of oil pump one and / or oil pump two; oil pump one is connected to the oil tank via a first oil circuit equipped with an oil suction filter; the oil tank is also equipped with an air filter, a heater, a temperature sensor, and a level gauge; characterized in that... It also includes a first hydraulic cylinder, a second hydraulic cylinder, an electro-hydraulic directional valve, a first safety valve, a second safety valve, a first relief valve, a second relief valve, a third relief valve, a proportional flow valve, and a buffer valve. The first oil port of the first hydraulic cylinder and the first oil port of the second hydraulic cylinder are connected through oil circuit one. The second oil port of the first hydraulic cylinder is connected to one end of the A main oil circuit. The second oil port of the second hydraulic cylinder is connected to the B main return oil circuit through oil circuit two. The other end of the main oil circuit A is connected to the first oil port of the electro-hydraulic directional valve, and the other end of the main return oil circuit B is connected to the second oil port of the electro-hydraulic directional valve. The B main return oil circuit is equipped with a first safety valve, and the A main oil circuit is connected to the B main return oil circuit through oil circuit three, which is equipped with a second safety valve. The third oil port of the electro-hydraulic directional valve is connected to the first oil pump through the fourth oil circuit, and the fourth oil circuit is equipped with the first check valve. Oil circuit four is connected to the first oil port of the proportional flow valve through oil circuit five. The second oil port of the proportional flow valve is connected to the B main return oil circuit through oil circuit six. Oil circuit six is ​​equipped with a third relief valve. The third oil port of the proportional flow valve is connected to oil pump two through oil circuit seven. Oil circuit seven is equipped with a second check valve. Oil circuit 4 is connected to the first oil port of the first relief valve through oil circuit 8. The second oil port of the first relief valve is connected to the first oil port of the second relief valve through oil circuit 9. The second oil port of the second relief valve is connected to the B main return oil circuit through oil circuit 10. The third oil port of the second relief valve is connected to oil circuit 7 through oil circuit 11. The fourth oil port of the electro-hydraulic directional valve is connected to the first oil port of the buffer valve through oil circuit twelve, and the second oil port of the buffer valve is connected to the B main return oil circuit through oil circuit thirteen. The fifth oil port of the electro-hydraulic directional valve is connected to oil circuit seven through oil circuit fourteen.

2. The novel hydraulic system for large surface grinders according to claim 1, characterized in that, The sixth oil port of the electro-hydraulic directional valve can be connected to the oil tank through the return oil circuit.

3. The novel hydraulic system for large surface grinders according to claim 1, characterized in that, The third port of the proportional flow valve is connected to the oil tank through the return oil circuit.

Images