CN213144906U - Bucket-wheel driving closed hydraulic system loop for bucket-wheel stacker reclaimer - Google Patents

Abstract

The utility model discloses a bucket-wheel driving closed hydraulic system loop used by a bucket-wheel stacker reclaimer, which comprises a closed axial plunger pump, a low-pressure sensor, an energy accumulator, a high-pressure filter, a flushing valve group, a high-pressure sensor, a motor safety valve group, a low-speed large-torque motor and a motor shell flushing loop, and the utility model realizes intelligent monitoring of the closed loop by arranging the low-pressure sensor, the high-pressure sensor, a pressure switch, a temperature sensor, a liquid level sensor and the like, and can eliminate faults in a sprouting state; the motor safety valve bank and the high-pressure overflow valve of the closed axial plunger pump form double insurance, prevent overpressure of the system and protect two most important elements in the system: a closed axial plunger pump and a low-speed large-torque motor; the constant power control mode of the pump, the use of the hot oil flushing valve group and the air cooler reduce the temperature of hydraulic oil of the system and reduce the occurrence frequency of faults.

Description

Bucket-wheel driving closed hydraulic system loop for bucket-wheel stacker reclaimer

Technical Field

The utility model relates to a hydraulic system circuit design field specifically is a bucket-wheel drive closed hydraulic system circuit that bucket-wheel stacker reclaimer used.

Background

The bucket-wheel stacker reclaimer is a high-efficiency device for continuously loading and unloading a large amount of bulk materials in the modern industry, and is widely applied to the stacking and reclaiming operation of bulk material (ore, coal, coke and gravel) storage yards of ports, docks, metallurgy, cement, iron and steel plants, coking plants, coal storage plants, power plants and the like at present. The bucket-wheel stacker reclaimer continuously reclaims materials by utilizing the bucket wheel, continuously conveys materials by utilizing the belt conveyor, and the rotation of the bucket wheel is the core action. In the prior art, a low-speed large-torque motor is adopted to drive a bucket wheel to continuously rotate, and a hydraulic system is required to be configured. The bucket wheel driving hydraulic system comprises an open system and a closed system, and the open system has low efficiency and large impact; the closed system has high efficiency, good stability, severe environment resistance, high failure rate and high requirement on the use and maintenance level.

Common faults of a bucket wheel driving closed system include large heating value, easy damage of a low-speed large-torque motor, easy deterioration of hydraulic oil, early wear failure of the motor and a plunger pump and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bucket wheel drive closed hydraulic system return circuit that bucket wheel stacker-reclaimer used for realize energy saving and emission reduction, reduce hydraulic system calorific capacity, each key point state of real time monitoring, timely early warning improves bucket wheel machine production efficiency and equipment security.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a bucket-wheel drive closed hydraulic system return circuit that bucket-wheel stacker reclaimer used, includes closed axial plunger pump, low pressure sensor, energy storage ware, high pressure filter, flushing valve group, high pressure sensor, motor safety valve group, big torque motor of low-speed and motor casing flushing circuit, still includes supplementary flushing circuit and circulative cooling return circuit, the main loop uses the rotatory axial plunger pump of closed two-way rotation (by motor drive), low pressure sensor, energy storage ware, high pressure filter, hot oil flushing valve group, high pressure sensor, big torque hydraulic motor of low-speed, motor safety valve group to constitute. The function is to drive the bucket wheel to rotate in the forward and reverse directions and adopt a control mode of constant power.

Preferably, the auxiliary flushing loop is composed of a fixed displacement pump (driven by a motor), an overflow valve, a one-way valve, a throttle valve and a pressure switch. The function is to ensure that the motor shell is always flushed by hydraulic oil, and ensure that the pressure of the flushing oil does not exceed the range of the use pressure of the shell.

Preferably, the circulating cooling loop is composed of a constant delivery pump (shared with the auxiliary flushing loop), an air cooler, a one-way valve, an oil return filter, an air filter, a temperature liquid level sensor, a heater and an oil tank. The functions are heating, cooling and purifying the hydraulic oil.

Preferably, the closed axial plunger pump can rotate in two directions to drive the low-speed large-torque motor to rotate in two directions.

Preferably, two oil ports of the plunger pump are respectively connected with two oil ports of the low-speed large-torque motor, a low-pressure sensor (monitoring the outlet pressure value of the oil replenishing pump), an energy accumulator and a high-pressure filter are arranged at the outlet of the oil replenishing pump of the plunger pump, and a high-pressure sensor (monitoring the pressure values of the two oil ports of the plunger pump) is arranged at the two oil ports of the plunger pump.

Preferably, the flushing valve group is connected between the plunger pump and the low-speed high-torque motor in parallel, and the outlet is connected with the oil tank.

Preferably, the low-speed high-torque motor is provided with a motor safety valve group (comprising an overflow valve and a one-way valve), the motor shell flushing loop is provided with a throttle valve and a pressure switch (triggered when the pressure is high), and redundant flow in the flushing loop returns to the oil tank through the air cooler and the low-pressure filter.

Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model realizes intelligent monitoring of the closed loop by arranging the low-voltage sensor, the high-voltage sensor, the pressure switch, the temperature sensor, the liquid level sensor and the like, and can eliminate the fault in the bud state; the motor safety valve bank and the high-pressure overflow valve of the closed axial plunger pump form double insurance, prevent overpressure of the system and protect two most important elements in the system: a closed axial plunger pump and a low-speed large-torque motor; the constant power control mode of the pump, the use of the hot oil flushing valve group and the air cooler reduce the temperature of hydraulic oil of the system and reduce the occurrence frequency of faults.

Drawings

FIG. 1 is a hydraulic drive schematic of a bucket wheel;

fig. 2 is a schematic diagram of a hydraulic system.

Detailed Description

The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-2, the utility model provides a technical solution: the utility model provides a bucket-wheel drive closed hydraulic system return circuit that bucket-wheel stacker reclaimer used, includes closed axial plunger pump, low pressure sensor, energy storage ware, high pressure filter, flushing valve group, high pressure sensor, motor safety valve group, big torque motor of low-speed and motor casing flushing circuit, still includes supplementary flushing circuit and circulative cooling return circuit, the main loop uses the rotatory axial plunger pump of closed two-way rotation (by motor drive), low pressure sensor, energy storage ware, high pressure filter, hot oil flushing valve group, high pressure sensor, big torque hydraulic motor of low-speed, motor safety valve group to constitute. The function is to drive the bucket wheel to rotate in the forward and reverse directions and adopt a control mode of constant power.

As shown in FIG. 2, the motor M rotates clockwise to drive the No. 2 closed axial plunger oil pump to rotate, and the oil pump can adjust the steering direction according to the electrification conditions (AA1 and AA2) of the proportional valve, and can rotate clockwise or anticlockwise. The No. 7 high-pressure filter has the function of filtering pressure oil output by an oil supplementing pump in the closed plunger pump, and the No. 6 low-pressure sensor monitors the pressure value of the output oil of the oil supplementing pump in real time; the No. 5 energy accumulator is used for supplying oil to the low-pressure side of the closed axial plunger pump when the oil supply pump is occasionally insufficient. The proportional valve of the closed pump is controlled by constant power, so that the installed power of the system is reduced, and the system achieves the purpose of energy conservation.

No. 9 and No. 10 are hot oil flushing valve groups, and the functions are that hot oil in the closed loop is discharged to a part and enters an oil tank, so that the heat exchange effect is realized, the temperature of oil in the closed loop is reduced, the reliability of each element is improved, and the system fault rate is reduced.

No. 8 is a high-pressure sensor, has the function of monitoring the pressure of two oil ports of the axial plunger pump in real time, and immediately gives an alarm when a fault occurs, and then stops the machine.

A motor safety valve group consisting of a No. 11 overflow valve and a No. 12 check valve is arranged on the low-speed large-torque motor, and the motor safety valve group has the functions of preventing the motor from being subjected to high pressure outside rated pressure during operation and protecting the motor from being damaged by overpressure.

No. 19 constant delivery pump rotates under 16 motor's drive, exports the washing oil and gets into the washing mouth (FLUSH mouth) of motor through 13 throttle valves, and 14 pressure switches monitor the washing oil pressure, report to the police when being higher than the setting pressure value, also report to the police when being less than another setting value, the protection motor.

The check valve number 27 acts as a load providing inlet pressure for the throttle valve number 13. No. 29 air cooler is used for cooling hydraulic oil, and No. 28 one-way valve is used as a bypass to protect the air cooler from being damaged by blocked high pressure. No. 30 return oil filter cleaning oil liquid guarantees the system cleanliness. No. 33 is a temperature and liquid level sensor, and the liquid level height and the temperature of oil in the No. 34 oil tank are monitored in real time. No. 15 is an air filter, so that dust and the like are prevented from entering an oil tank to pollute oil. No. 32 is a heater which is started to heat the hydraulic oil when the ambient temperature is low.

The signals of the low-voltage sensor, the high-voltage sensor, the pressure switch, the temperature sensor and the liquid level sensor are transmitted into the PLC of the closed loop in real time, so that the intelligent monitoring of the closed loop is realized, and the fault can be eliminated in the sprouting state.

The motor safety valve bank and the high-pressure overflow valve of the closed axial plunger pump form double insurance, prevent overpressure of the system and protect two most important elements in the system: closed axial plunger pump and low speed large torque motor.

The constant power control mode of the pump, the use of the hot oil flushing valve group and the air cooler reduce the temperature of hydraulic oil of the system and reduce the occurrence frequency of faults.

The embodiment is described only for the preferred embodiment of the present invention, but not for limiting the protection scope of the invention, and various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall within the protection scope determined by the claims of the present invention without departing from the design spirit of the present invention.

Claims (7)

1. The utility model provides a bucket wheel drive closed hydraulic system return circuit that bucket wheel stacker-reclaimer used, includes that closed axial plunger pump, low pressure sensor, energy storage ware, high pressure filter, flushing valve group, high pressure sensor, motor safety valve group, low-speed big torque motor and motor housing wash the return circuit, its characterized in that still includes supplementary washing return circuit and circulative cooling return circuit, but closed axial plunger pump two-way rotation drives low-speed big torque motor two-way rotation.

2. The closed bucket-wheel driving hydraulic system circuit for the bucket-wheel stacker-reclaimer of claim 1, wherein the auxiliary flushing circuit is formed by connecting a constant delivery pump, an overflow valve, a check valve, a throttle valve and a pressure switch.

3. The bucket-wheel driving closed hydraulic system circuit for the bucket-wheel stacker reclaimer as claimed in claim 1, wherein the circulating cooling circuit is formed by connecting a constant delivery pump, an air cooler, a one-way valve, an oil return filter, an air filter, a temperature liquid level sensor, a heater and an oil tank.

4. The closed hydraulic system circuit for the bucket-wheel stacker reclaimer of claim 1, wherein the closed axial plunger pump is capable of rotating bidirectionally to drive the low-speed high-torque motor to rotate bidirectionally.

5. The bucket-wheel driving closed hydraulic system circuit for the bucket-wheel stacker reclaimer as claimed in claim 1, wherein two oil ports of the plunger pump are respectively connected with two oil ports of the low-speed high-torque motor, the outlet of the oil replenishing pump of the plunger pump is provided with the low-pressure sensor, the energy accumulator and the high-pressure filter, and the two oil ports of the plunger pump are provided with the high-pressure sensor.

6. The closed bucket-wheel-drive hydraulic system circuit of claim 1, wherein the flushing valve set is connected in parallel between the plunger pump and the low-speed high-torque motor, and the outlet of the flushing valve set is connected with the oil tank.

7. The closed bucket-wheel-drive hydraulic system circuit for a bucket-wheel stacker reclaimer of claim 1, wherein the low-speed high-torque motor is provided with a motor safety valve set, and the motor housing flushing circuit is provided with a throttle valve and a pressure switch.

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