CN116116557A - Multistage speed regulation control method for mobile vertical shaft impact type crushing station host - Google Patents

Abstract

The invention discloses a multistage speed regulation control method for a mobile vertical shaft impact crushing station host machine, which utilizes a host machine pump electric proportional valve, an engine and a host machine motor electric proportional valve to carry out successive approximation multistage speed regulation control on the host machine, can efficiently, reliably and accurately regulate the rotating speed of the host machine, ensures that equipment is always in the maximum productivity and the most comfortable working state, reduces the probability of equipment failure, and improves the service life of the equipment while bringing maximum economic benefit to customers.

Description

A multi-stage speed regulation control method for the main engine of a mobile vertical shaft impact crushing station

technical field

The invention relates to the technical field of speed regulation of a main engine of a mobile vertical shaft impact crushing station, in particular to a multi-stage speed regulation control method for a main engine of a mobile vertical shaft impact crushing station.

Background technique

With the increasing demand for construction sand in my country's social and economic construction, natural sand can no longer meet the needs of engineering construction, and the application of machine-made sand is becoming more and more extensive. Wide range of applications. Mobile vertical shaft impact crusher is a kind of mining machinery equipment for crushing rocks and making sand. It is often used in mine crushing and sand making. It has the characteristics of stable and reliable work, convenient maintenance, and high sand making rate. Widely used in fine crushing operations in hydropower, construction, cement, metal mines and other industries.

The impact speed is one of the main working parameters of the vertical shaft impact crusher. Based on its research, the working speed of the main shaft can be reasonably selected. A suitable main machine speed can not only improve the working efficiency, but also save energy and reduce consumption, bringing the greatest benefits to the user. economic benefits.

At present, there are many methods for adjusting the speed of the main engine of the mobile vertical shaft impact crushing station, including (1) controlling the current of the solenoid valve of the main engine pump. The main engine pump is directly driven by the engine and powered by the engine. The pump is a variable displacement pump, which can be adjusted The current of the solenoid valve is used to adjust the opening of the swash plate of the main engine pump to realize the adjustment of the displacement of the main engine pump; (2) The speed of the main engine is adjusted by adjusting the current of the electric proportional valve. The rotation speed is inversely proportional to the displacement of the main engine motor, that is, the larger the displacement of the main engine motor, the lower the speed of the main engine, and the smaller the displacement of the main engine motor, the higher the speed of the main engine. (3) Adjust the speed of the main engine by adjusting the engine speed. Theoretically, the flow of the main engine pump is proportional to the displacement and the rotational speed. Therefore, it is hoped that increasing the flow of the main engine pump can be achieved by increasing the speed of the main engine pump. The main engine pump is directly driven by the engine, so increasing the engine speed can increase the main engine pump speed, thereby increasing the flow of the main engine pump. The main engine pump drives the main engine motor, and the flow rate of the main engine pump increases, which can increase the speed of the main engine motor.

The above three main engine speed regulation methods are often used alone at present, or adjusted by the staff on site based on experience. This method often cannot meet the speed requirements of the main engine. Even if the speed requirements are met, some systems may be in an overload working state. , resulting in a large increase in fuel consumption and a reduction in the cost performance of energy utilization, which does not meet the requirements of green and low-carbon, and when the system load is too large, it will cause problems such as hydraulic system pressure exceeding the limit.

Contents of the invention

In order to solve the defects in the above-mentioned prior art, the present invention provides a multi-stage speed regulation control method for the main engine of the mobile vertical shaft impact crushing station, which uses the main engine pump electric proportional valve, the engine, and the main engine motor electric proportional valve to adopt successive approximation to the main engine. Multi-level speed regulation control can efficiently, reliably and accurately adjust the speed of the main engine.

The technical solution adopted in the present invention: a multi-stage speed regulation control method for the main engine of the mobile vertical shaft impact crushing station, including the following steps:

S1: Initialize system settings, including: maximum working pressure of the hydraulic system, set value of main engine speed, maximum operating current of main engine pump solenoid valve, minimum operating current of main engine pump solenoid valve, minimum engine operating speed, maximum engine operating speed, main engine motor electrical ratio The minimum working current of the valve, the maximum working current of the electric proportional valve of the host motor, the minimum working speed of the main engine, and the maximum working speed of the main engine;

S2: Collect system data, including: main engine pump solenoid valve working current signal, electric proportional valve working current signal, hydraulic system pressure signal, main engine speed signal, engine speed signal;

S3: Judging whether the working pressure of the hydraulic system reaches the set value according to the pressure signal of the hydraulic system, if it reaches or exceeds the set value, return to step S2, otherwise proceed to step S4;

S4: Judging whether the speed of the main machine is lower than the set value according to the speed signal of the main machine, if it is less than the set value, proceed to step S5 for speed-up control of the main machine speed, and if it is greater than the set value, enter step S8 for speed-down control of the main machine speed;

S5: According to the working current signal of the solenoid valve of the main engine pump, judge whether the working current of the solenoid valve of the main engine pump reaches the upper limit, if not, control the current of the solenoid valve of the main engine pump to increase, and return to step S2; Only by adjusting the pump displacement of the main engine can no longer meet the requirement of increasing the speed of the main engine, go to step S6;

S6: Determine whether the engine speed reaches the upper limit according to the engine speed signal. If not, control the engine speed to increase, and then return to step S2. If the engine speed reaches the upper limit, it means that the engine speed has reached the upper limit. S7;

S7: According to the working current signal of the electric proportional valve, it is judged whether the current of the proportional valve of the main engine motor reaches the lower limit, if not, the control reduces the current of the electric proportional valve of the main engine motor, and then returns to step S2;

S8: Determine whether the current of the proportional valve of the main engine motor reaches the upper limit according to the working current signal of the electric proportional valve. The current of the electric proportional valve of the main engine motor can no longer meet the requirement of reducing the speed of the main engine, so go to step S9;

S9: Determine whether the engine speed reaches the lower limit according to the engine speed signal, if not, control the engine speed to decrease, and then return to step S2; if the engine speed reaches the lower limit, it means that the engine speed has reached the lower limit and cannot meet the demand for reducing the host speed. Go to step S10;

S10: According to the working current signal of the solenoid valve of the main engine pump, it is judged whether the working current of the electromagnetic valve of the main engine pump reaches the lower limit, if not, the control reduces the current of the electromagnetic valve of the main engine pump, and then returns to step S2.

Preferably, the method for controlling the current rise of the solenoid valve of the main engine pump in step S5 adopts the method of increasing the current by N steps, dividing the current from 0 to the upper limit into N steps, and increasing the current step by step.

Preferably, the method for controlling the increase of the engine speed in step S6 adopts N-level speed control, divides the engine speed into N levels from the lower limit to the upper limit, and adopts different levels of speed according to the control signal.

Preferably, the method of controlling and reducing the current of the electric proportional valve of the host motor in step S7 adopts the method of decreasing the current in N steps step by step, dividing the current from the upper limit to the lower limit into N steps, and reducing the current size step by step.

Preferably, the method of controlling and increasing the current of the electric proportional valve of the host motor in step S8 adopts the method of increasing the current in N steps successively, dividing the current from the lower limit to the upper limit into N steps, and increasing the current step by step.

Preferably, the method for controlling the decrease of the engine speed in step S9 adopts the method of N-level speed control, divides the engine speed into N levels from the upper limit to the lower limit, and adopts different levels of speed according to the control signal.

Preferably, the method of controlling and reducing the current of the solenoid valve of the main engine pump in step S10 adopts the method of decreasing the current in N steps step by step, dividing the current from the upper limit to 0 into N steps, and reducing the magnitude of the current step by step.

Beneficial effects of the present invention: the main engine can be efficiently, reliably and accurately adjusted to the speed of the main engine by using the pump electric proportional valve, the engine, and the main engine motor electric proportional valve to control the main engine by successive approximation, so that the equipment can always be at the maximum production capacity and the maximum output. Comfortable working conditions reduce the probability of equipment failure, thereby bringing maximum economic benefits to customers and improving the service life of equipment.

Description of drawings

Fig. 1 is a flow chart of the multi-stage speed regulation method of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figure 1, taking the XPL1000 mobile vertical shaft impact crushing station produced by our company as an example, its multi-level speed regulation control method is as follows:

S1: After the system is running, it is necessary to perform initial settings. The initial settings include: the maximum working pressure of the hydraulic system, the set value of the main engine speed, the maximum operating current of the main engine pump solenoid valve, the minimum operating current of the main engine pump solenoid valve, and the minimum operating speed of the engine. , the maximum operating speed of the engine, the minimum operating current of the main engine motor electric proportional valve, the maximum operating current of the main engine motor electric proportional valve, the minimum operating speed of the main engine, and the maximum operating speed of the main engine;

S2: Collection of system data, the collected content includes: main engine pump solenoid valve working current signal, electric proportional valve working current signal, hydraulic system pressure signal, main engine speed signal, engine speed signal, and calculate and convert these signals into corresponding work The current, pressure and speed are sent to the monitor for display, and provide the basis for the subsequent host speed regulation;

S3: Determine whether the working pressure of the hydraulic system reaches the set value, if it reaches or exceeds, directly return to step S2, if not reach the set value, go to step S4;

S4: Judging whether the speed of the main machine is lower than the set value according to the speed signal of the main machine, if it is less than the set value, proceed to step S5 for speed-up control of the main machine speed, and if it is greater than the set value, enter step S8 for speed-down control of the main machine speed;

S5: Determine whether the operating current of the solenoid valve of the main engine pump reaches the upper limit. If not, control the current of the solenoid valve of the main engine pump to increase, and then return to step S2. The current control of the electromagnetic valve of the main engine adopts a three-step approach to the current, and the current is from 0-225mA It takes 2.3S, the current takes 80S from 225-425mA, and 50S from 425-600mA. If the current reaches the upper limit, it means that only by adjusting the pump displacement of the main engine can not meet the requirement of increasing the speed of the main engine, and it is necessary to enter step S6;

S6: Determine whether the engine speed has reached the upper limit of the speed. If not, control the engine speed to increase, and then return to step 2. The increase of the engine speed is controlled by step speed. There are four speeds for use, namely 1500rpm, 1600rpm, and 1700rpm , 1800rpm, so that the requirements for rapidly changing the engine speed can be met. If the engine speed reaches the upper limit, it means that increasing the engine speed to reach the upper limit can no longer meet the demand for increasing the engine speed, and it is necessary to enter step S7;

S7: Determine whether the electric proportional valve current of the main engine motor reaches the lower limit. If not, control the reduction of the electric proportional valve current of the main engine motor, and then return to step 2. The time span of the main engine motor current from 500mA to 300mA is controlled at 8.5S, which is also adopted successively. Approximate way to adjust, through the process of 5-7 steps, the speed-up target of the host speed can be completed;

S8: This step is the first step to reduce the speed of the main engine. It is judged whether the current of the electric proportional valve of the main engine motor reaches the upper limit. If not, the current of the electric proportional valve of the main engine motor is controlled to increase, and then return to step 2. The current of the main engine motor is from 300mA to 500mA The time span is controlled at 8.5S, which is also carried out by successive approximation. If the current upper limit is reached, it means that only by increasing the host motor current can not meet the requirement of reducing the host speed, and it is necessary to enter step S9;

S9: Determine whether the engine speed has reached the lower limit of the speed. If not, control the engine speed to drop, and then return to step 2. The drop of the engine speed is also controlled by step speed. If the engine speed reaches the lower limit, it means that the engine speed can be reduced to reach the lower limit. The lower limit can no longer meet the requirement of reducing the speed of the main engine, and it is necessary to enter step S10;

S10: Determine whether the operating current of the solenoid valve of the main engine pump reaches the lower limit of the current. If not, control the current of the solenoid valve of the main engine pump to reduce, and then return to step 2. The reduction control of the solenoid valve current of the main engine pump is also carried out in a three-step approach. After the process of steps S8-S10, the speed-down process of the main engine speed can be completed.

In this embodiment, the purpose of the time span of current control is to ensure the stability of the speed regulation process, and the time span is set differently according to different models. vibration, taking into account the stability of the host startup and the customer's experience with the device. For example, the time span of the host motor current from 300mA to 500mA is controlled at 8.5S, here 8.5S is based on the monitoring of the host pressure and the vibration amplitude of the whole machine during the process of the current from 300mA to 500mA, if the host pressure does not exceed within 8.5S The upper limit of the design and the vibration amplitude of the whole machine does not exceed the value required by the customer, which means that the speed regulation effect is stable when the time span of the motor current from 300mA to 500mA is controlled within 8.5S, otherwise the time span of speed regulation should be extended appropriately. Other models of products also use this logic to adjust. For the setting of current ladder and speed ladder, different current ladders and speed ladders can be set according to material type, customer requirements, and finished product requirements.

After the above 10 steps, the system can better complete the multi-level regulation of the main engine speed, comprehensively considering the main engine power, work efficiency, engine fuel consumption and other requirements, so that it is always in the optimal working state.

Claims (7)

1. A multistage speed regulation control method for a movable vertical shaft impact crushing station host machine is characterized by comprising the following steps of: the method comprises the following steps:

s1: initializing system settings, comprising: the hydraulic system maximum working pressure, the host rotation speed set value, the host pump electromagnetic valve maximum working current, the host pump electromagnetic valve minimum working current, the engine minimum working rotation speed, the engine maximum working rotation speed, the host motor electric proportional valve minimum working electric injection, the host motor electric proportional valve maximum working current, the host minimum working rotation speed and the host maximum working rotation speed;

s2: collecting system data, comprising: a main machine pump electromagnetic valve working current signal, an electric proportional valve working current signal, a hydraulic system pressure signal, a main machine rotating speed signal and an engine rotating speed signal;

s3: judging whether the working pressure of the hydraulic system reaches a set value according to the pressure signal of the hydraulic system, returning to the step S2 if the working pressure reaches or exceeds the set value, otherwise, carrying out the step S4;

s4: judging whether the host rotation speed is smaller than a set value according to the host rotation speed signal, if so, entering a step S5 to perform host rotation speed up-speed control, and if so, entering a step S8 to perform host rotation speed down-speed control;

s5: judging whether the working current of the solenoid valve of the host pump reaches the upper limit according to the working current signal of the solenoid valve of the host pump, if not, controlling the current of the solenoid valve of the host pump to rise, and returning to the step S2; if the working current of the electromagnetic valve of the host pump reaches the upper limit, the requirement of improving the rotating speed of the host can not be met only by adjusting the displacement of the host pump, and the step S6 is entered;

s6: judging whether the engine speed reaches an upper limit according to the engine speed signal, if not, controlling the engine speed to rise, returning to the step S2, and if the engine speed reaches the upper limit, indicating that the engine speed reaches the upper limit and can not meet the requirement of improving the engine speed, and entering the step S7;

s7: judging whether the current of the proportional valve of the host motor reaches the lower limit according to the working current signal of the electric proportional valve, if not, controlling to reduce the current of the electric proportional valve of the host motor, and returning to the step S2;

s8: judging whether the current of the proportional valve of the host motor reaches the upper limit according to the working current signal of the electric proportional valve, if not, controlling to increase the current of the electric proportional valve of the host motor, and returning to the step S2; if the current of the proportional valve of the host motor reaches the upper limit, the current of the proportional valve of the host motor cannot meet the requirement of reducing the rotating speed of the host by increasing the current of the proportional valve of the host motor, and the step S9 is entered;

s9: judging whether the engine speed reaches a lower limit according to the engine speed signal, if not, controlling the engine speed to drop, and returning to the step S2; if the engine speed reaches the lower limit, which indicates that the requirement of reducing the engine speed cannot be met, and the step S10 is performed;

s10: judging whether the working current of the solenoid valve of the host pump reaches the lower limit according to the working current signal of the solenoid valve of the host pump, if not, controlling to reduce the current of the solenoid valve of the host pump, and returning to the step S2.

2. The method for controlling the multistage speed regulation of the main machine of the movable vertical shaft impact crushing station according to claim 1, wherein the method comprises the following steps of: in the step S5, the method for controlling the current rise of the solenoid valve of the host pump adopts a mode of gradually rising N steps, the current is divided into N steps from 0 to the upper limit, and the current is gradually increased.

3. The method for controlling the multistage speed regulation of the main machine of the movable vertical shaft impact crushing station according to claim 1, wherein the method comprises the following steps of: in the step S6, the method for controlling the increase of the engine speed adopts an N-level speed control mode, the engine speed is divided into N levels from the lower limit to the upper limit, and the speeds of different levels are respectively adopted according to the control signal.

4. The method for controlling the multistage speed regulation of the main machine of the movable vertical shaft impact crushing station according to claim 1, wherein the method comprises the following steps of: in the step S7, the method for controlling and reducing the current of the electric proportional valve of the host motor adopts a mode of gradually reducing N steps, the current is divided into N steps from the upper limit to the lower limit, and the current is gradually reduced.

5. The method for controlling the multistage speed regulation of the main machine of the movable vertical shaft impact crushing station according to claim 1, wherein the method comprises the following steps of: in the step S8, the method for controlling and increasing the current of the electric proportional valve of the host motor adopts a mode of gradually increasing N steps, the current is divided into N steps from the lower limit to the upper limit, and the current is gradually increased.

6. The method for controlling the multistage speed regulation of the main machine of the movable vertical shaft impact crushing station according to claim 1, wherein the method comprises the following steps of: the method for controlling the drop of the engine speed in the step S9 adopts a method of controlling the engine speed in N levels, divides the engine speed from the upper limit to the lower limit into N levels, and adopts different levels of speeds according to the control signal.

7. The method for controlling the multistage speed regulation of the main machine of the movable vertical shaft impact crushing station according to claim 1, wherein the method comprises the following steps of: in step S10, the method for controlling and reducing the current of the solenoid valve of the host pump adopts a mode of gradually reducing the current from the upper limit to 0 and is divided into N steps, so that the current is gradually reduced.

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