CN104100608B - For stand-by plant during potential energy recovery system fault and using method thereof - Google Patents

Abstract

The present invention relates to a kind of for stand-by plant during potential energy recovery system fault and using method thereof, this device first potential energy reclaims cylinder rod chamber oil mouth and connects first and second solenoid operated directional valve B, A mouth, and the first potential energy reclaims cylinder rodless cavity oil mouth and connects first and second solenoid operated directional valve A, B mouth and the first ball valve oil-in; Two, four solenoid operated directional valve P mouths are connected and are connected with lift cylinders rodless cavity oil mouth, and the 2nd, the 4th solenoid operated directional valve T mouth is connected with lift cylinders rod chamber oil mouth and is connected with fuel tank; 2nd potential energy reclaims cylinder rod chamber oil mouth and connects third and fourth solenoid operated directional valve B, A mouth, and the 2nd potential energy reclaims cylinder rodless cavity oil mouth and connects third and fourth solenoid operated directional valve A, B mouth and the 2nd ball valve oil-in. Present method step: determine that first and second potential energy reclaims required peak flow when cylinder rises; Determine first and second stand-by pump drive-motor power: still can normally run when the present invention can guarantee that potential energy recovery system occurs abnormal.

Description

For stand-by plant during potential energy recovery system fault and using method thereof

Technical field

The present invention relates to a kind of stand-by plant and using method thereof, specifically for stand-by plant during potential energy recovery system fault and using method thereof.

Background technology

Lifting and walking machinery account for very big proportion at industry-by-industry, and its major part all belongs to heavy duty, continuously production status, drives by lift cylinders, add auxiliary back pressure by deadweight or power during decline when these equipment rises. The gravitional force major part discharged in decline process is converted into heat and is consumed in vain, and this portion of energy has accounted for 50% to 70% of total energy consumption when promoting, even higher. Walking beam furnace, all there is identical problem in walking beam transporter, walking beam cooler, lift weighing-appliance, hydraulic lift etc.: in decline process, major part gravitional force is consumed in vain, causes the significant wastage of the energy. Potential energy recovery system can part gravitional force in these liftings of efficient recovery and walking machinery decline process, and for promoting next time, it may be achieved energy-conservation about 40%��60%. But, at any production unit, it is ensured that " the absolute stability operation " of equipment is the primary prerequisite guaranteeing normal production, as broken down, can affect the operation of equipment.

Summary of the invention

The present invention is intended to overcome the defect of prior art, it is provided that a kind of for stand-by plant during potential energy recovery system fault and using method thereof, still can normally run when can guarantee that potential energy recovery system occurs abnormal.

In order to solve the problems of the technologies described above, the present invention is achieved in that

It is a kind of for stand-by plant during potential energy recovery system fault, it is characterised in that: it comprises potential energy recovery system, fuel tank, system main pump, lift cylinders, the first potential energy recovery cylinder, the 2nd potential energy recovery cylinder, the first solenoid operated directional valve, the 2nd solenoid operated directional valve, the 3rd solenoid operated directional valve, the 4th solenoid operated directional valve, the first ball valve, the 2nd ball valve, the first check valve, the 2nd check valve, the 3rd check valve, safety valve, the first stand-by pump and the 2nd stand-by pump;

The oil suction of system main pump, the first stand-by pump and the 2nd stand-by pump is connected with fuel tank, the oil outlet of system main pump, the first stand-by pump and the 2nd stand-by pump connects the oil-in of the 3rd check valve, the first check valve and the 2nd check valve respectively, 3rd check valve, the first check valve are connected with the oil outlet of the 2nd check valve and are connected with the rodless cavity oil mouth of lift cylinders, the oil-in of safety valve connects the oil outlet of the 3rd check valve, and the oil outlet of safety valve connects fuel tank;

The rod chamber oil mouth that first potential energy reclaims cylinder connects the B mouth of the first solenoid operated directional valve and the A mouth of the 2nd solenoid operated directional valve respectively, and the rodless cavity oil mouth of the first potential energy recovery cylinder connects the A mouth of the first solenoid operated directional valve, the B mouth of the 2nd solenoid operated directional valve and the oil-in of the first ball valve respectively; The T mouth of the first solenoid operated directional valve, the T mouth of the 3rd solenoid operated directional valve are connected with the rod chamber oil mouth of lift cylinders and are connected with fuel tank; The P mouth of the 2nd solenoid operated directional valve is connected with the P mouth of the 4th solenoid operated directional valve and is connected with the rodless cavity oil mouth of lift cylinders, and the T mouth of the 2nd solenoid operated directional valve is connected with the rod chamber oil mouth of lift cylinders with the T mouth of the 4th solenoid operated directional valve and is connected with fuel tank; The oil outlet of the first ball valve connects potential energy recovery system;

The rod chamber oil mouth that 2nd potential energy reclaims cylinder connects the B mouth of the 3rd solenoid operated directional valve and the A mouth of the 4th solenoid operated directional valve respectively, and the rodless cavity oil mouth of the 2nd potential energy recovery cylinder connects the oil-in of the A mouth of the 3rd solenoid operated directional valve, the B mouth of the 4th solenoid operated directional valve and the 2nd ball valve respectively; The oil outlet of the 2nd ball valve connects potential energy recovery system.

It is described for stand-by plant during potential energy recovery system fault, it is characterised in that: described first stand-by pump and the 2nd stand-by pump are toothed gear pump, ram pump or vane pump.

The described using method for stand-by plant during potential energy recovery system fault, it is characterised in that, comprise the steps:

Step one: specification and the quantity that maximum operational speed when rising according to lift cylinders and the first potential energy reclaim cylinder, the 2nd potential energy reclaims cylinder, determine that the first potential energy reclaims cylinder, the 2nd potential energy reclaims required peak flow when cylinder rises, to determine the first stand-by pump and the specification of the 2nd stand-by pump:

$Q_{1max}=1.5\×{10}^{-2}\·n_1\·\mathrm{\π}\·D_1^2\·v_{max}---\left(1\right)$

$Q_{2max}=1.5\×{10}^{-2}\·n_2\·\mathrm{\π}\·D_2^2\·v_{max}---\left(2\right)$

In formula (1):

Q_1max: the first potential energy reclaims required peak flow when cylinder rises;

n₁: the first potential energy reclaims the quantity of cylinder;

D₁: the first potential energy reclaims cylinder rodless cavity diameter;

v_max: maximum operational speed when lift cylinders rises;

In formula (2):

Q_2max: the 2nd potential energy reclaims required peak flow when cylinder rises

n₂: the 2nd potential energy reclaims the quantity of cylinder;

D₂: the 2nd potential energy reclaims cylinder rodless cavity diameter;

Required peak flow Q when reclaiming cylinder and the recovery cylinder rising of the 2nd potential energy according to the first potential energy_1max��Q_2maxThe specification of first, second stand-by pump can be confirmed.

Step 2: according to Q_1max��Q_2maxThe drive-motor power of the first stand-by pump, the 2nd stand-by pump is determined with system pressure:

$P_{1max}=\frac{Q_{1max}\·p}{60{\mathrm{\η}}_1}---\left(3\right)$

$P_{2max}=\frac{Q_{2max}\·p}{60{\mathrm{\η}}_2}---\left(4\right)$

In formula (3):

P_1max: drive maximum motor power needed for the first stand-by pump;

��₁: the efficiency of the first stand-by pump;

P: system working pressure, its span is between 13��20MPa;

In formula (4):

P_2max: drive maximum motor power needed for the 2nd stand-by pump;

��₂: the efficiency of the 2nd stand-by pump;

According to the P calculated_1max��P_2maxSelect the first stand-by pump and the suitable drive-motor of the 2nd stand-by pump.

The described using method for stand-by plant during potential energy recovery system fault, it is characterised in that: in step 2, ��₁����₂Get 0.8��0.9.

The invention has the beneficial effects as follows: when can guarantee that potential energy recovery system abnormal and some unforeseeable fault occurs and temporarily stops work, equipment still can normally run, and does not affect production.

Accompanying drawing explanation

Below in conjunction with drawings and embodiments, the present invention is described in further detail:

Fig. 1 is the structural representation of the present invention.

Embodiment

As shown in Figure 1: a kind of for stand-by plant during potential energy recovery system fault, it comprises potential energy recovery system 9, fuel tank 10, system main pump 11, lift cylinders 12, first potential energy recovery cylinder 13, the 2nd potential energy recovery cylinder 14, first solenoid operated directional valve 1, the 2nd solenoid operated directional valve 2, the 3rd solenoid operated directional valve 3, the 4th solenoid operated directional valve 4, first ball valve 5, the 2nd ball valve 6, first check valve 17, the 2nd check valve 18, the 3rd check valve 16, safety valve 15, first stand-by pump 7 and the 2nd stand-by pump 8;

The oil suction 21 of system main pump, the oil suction 25 of the first stand-by pump and the oil suction 29 of the 2nd stand-by pump are connected with fuel tank, the oil outlet 22 of system main pump, the oil outlet 26 of the first stand-by pump and the oil outlet 30 of the 2nd stand-by pump connect the oil-in 23 of the 3rd check valve respectively, the oil-in 27 of the first check valve and the oil-in 31 of the 2nd check valve, the oil outlet 24 of the 3rd check valve, the oil outlet 28 of the first check valve is connected with the oil outlet 32 of the 2nd check valve and is connected with the rodless cavity oil mouth of lift cylinders, the oil-in 33 of safety valve connects the oil outlet of the 3rd check valve, the oil outlet 34 of safety valve connects fuel tank,

The rod chamber oil mouth that first potential energy reclaims cylinder connects the B mouth of the first solenoid operated directional valve and the A mouth of the 2nd solenoid operated directional valve respectively, and the rodless cavity oil mouth of the first potential energy recovery cylinder connects the A mouth of the first solenoid operated directional valve, the B mouth of the 2nd solenoid operated directional valve and the oil-in 35 of the first ball valve respectively; The T mouth of the first solenoid operated directional valve, the T mouth of the 3rd solenoid operated directional valve are connected with the rod chamber oil mouth of lift cylinders and are connected with fuel tank; The P mouth of the 2nd solenoid operated directional valve is connected with the P mouth of the 4th solenoid operated directional valve and is connected with the rodless cavity oil mouth of lift cylinders, and the T mouth of the 2nd solenoid operated directional valve is connected with the rod chamber oil mouth of lift cylinders with the T mouth of the 4th solenoid operated directional valve and is connected with fuel tank; The oil outlet 36 of the first ball valve connects potential energy recovery system;

The rod chamber oil mouth that 2nd potential energy reclaims cylinder connects the B mouth of the 3rd solenoid operated directional valve and the A mouth of the 4th solenoid operated directional valve respectively, and the rodless cavity oil mouth of the 2nd potential energy recovery cylinder connects the oil-in 37 of the A mouth of the 3rd solenoid operated directional valve, the B mouth of the 4th solenoid operated directional valve and the 2nd ball valve respectively; The oil outlet 38 of the 2nd ball valve connects potential energy recovery system. Described first stand-by pump and the 2nd stand-by pump are toothed gear pump, ram pump or vane pump.

First, second, third, fourth solenoid operated directional valve can also be valve or the valve group with identical function.

A kind of using method for stand-by plant during potential energy recovery system fault, it is characterised in that, comprise the steps:

Step one: specification and the quantity that maximum operational speed when rising according to lift cylinders and the first potential energy reclaim cylinder, the 2nd potential energy reclaims cylinder, determine that the first potential energy reclaims cylinder, the 2nd potential energy reclaims required peak flow when cylinder rises, to determine the first stand-by pump and the specification of the 2nd stand-by pump:

$Q_{1max}=1.5\×{10}^{-2}\·n_1\·\mathrm{\π}\·D_1^2\·v_{max}---\left(1\right)$

$Q_{2max}=1.5\×{10}^{-2}\·n_2\·\mathrm{\π}\·D_2^2\·v_{max}---\left(2\right)$

In formula (1):

Q_1max: the first potential energy reclaims required peak flow when cylinder rises;

n₁: the first potential energy reclaims the quantity of cylinder;

D₁: the first potential energy reclaims cylinder rodless cavity diameter;

v_max: maximum operational speed when lift cylinders rises;

In formula (2):

Q_2max: the 2nd potential energy reclaims required peak flow when cylinder rises

n₂: the 2nd potential energy reclaims the quantity of cylinder;

D₂: the 2nd potential energy reclaims cylinder rodless cavity diameter;

Required peak flow Q when reclaiming cylinder and the recovery cylinder rising of the 2nd potential energy according to the first potential energy_1max��Q_2maxThe specification of first, second stand-by pump can be confirmed.

Step 2: according to Q_1max��Q_2maxThe drive-motor power of the first stand-by pump, the 2nd stand-by pump is determined with system pressure:

$P_{1max}=\frac{Q_{1max}\·p}{60{\mathrm{\η}}_1}---\left(3\right)$

$P_{2max}=\frac{Q_{2max}\·p}{60{\mathrm{\η}}_2}---\left(4\right)$

In formula (3):

P_1max: drive maximum motor power needed for the first stand-by pump;

��₁: the efficiency of the first stand-by pump;

P: system working pressure, its span is between 13��20MPa;

In formula (4):

P_2max: drive maximum motor power needed for the 2nd stand-by pump;

��₂: the efficiency of the 2nd stand-by pump;

According to the P calculated_1max��P_2maxSelect the first stand-by pump and the suitable drive-motor of the 2nd stand-by pump.

The described using method for stand-by plant during potential energy recovery system fault, it is characterised in that: in step 2, ��₁����₂Get 0.8��0.9.

P mouth in above-mentioned solenoid operated directional valve is oil-in, and T mouth is oil return mouth, and A, B mouth is respectively the working oil mouth connecting topworks or other valves.

First potential energy reclaims cylinder and switches to potential energy to reclaim cylinder:

The coil " b " of the first solenoid operated directional valve obtains electric, and the first potential energy reclaims the connection of cylinder rod chamber and fuel tank;

2nd solenoid operated directional valve dead electricity, cuts off the connection that the first potential energy reclaims cylinder rod chamber, rodless cavity and lift cylinders rod chamber, rodless cavity;

First ball valve is opened, and the first potential energy reclaims cylinder rodless cavity and communicates with potential energy recovering hydraulic system;

First potential energy reclaims cylinder and switches to unloaded cylinder:

The coil " a " of the first solenoid operated directional valve obtains electric, and the first potential energy reclaims cylinder rod chamber, rodless cavity is all connected with fuel tank;

2nd solenoid operated directional valve dead electricity, cuts off the first potential energy recovery cylinder rod chamber, rodless cavity and communicates with lift cylinders rod chamber, rodless cavity respectively;

First ball valve is closed, and cuts off the connection that the first potential energy reclaims cylinder rodless cavity and potential energy recovering hydraulic system;

First potential energy reclaims cylinder and switches to lift cylinders:

The coil " a " of the first solenoid operated directional valve, " b " all dead electricity, cut off the connection that the first potential energy reclaims cylinder rod chamber, rodless cavity and fuel tank;

2nd solenoid operated directional valve obtains electric, makes the first potential energy reclaim cylinder rod chamber, rodless cavity and communicates with lift cylinders rod chamber, rodless cavity respectively;

First ball valve is closed, and cuts off the connection that the first potential energy reclaims cylinder rodless cavity and potential energy recovering hydraulic system;

First stand-by pump starts, and supplements the first potential energy and reclaims cylinder action necessary flow;

2nd potential energy reclaims cylinder and switches to potential energy to reclaim cylinder:

The coil " b " of the 3rd solenoid operated directional valve obtains electric, and the 2nd potential energy reclaims the connection of cylinder rod chamber and fuel tank;

4th solenoid operated directional valve dead electricity, cuts off the connection that the 2nd potential energy reclaims cylinder rod chamber, rodless cavity and lift cylinders rod chamber, rodless cavity;

2nd ball valve is opened, and the 2nd potential energy reclaims cylinder rodless cavity and communicates with potential energy recovering hydraulic system;

2nd potential energy reclaims cylinder and switches to unloaded cylinder:

The coil " a " of the 3rd solenoid operated directional valve obtains electric, and the 2nd potential energy reclaims cylinder rod chamber, rodless cavity is all connected with fuel tank;

4th solenoid operated directional valve dead electricity, cuts off the 2nd potential energy recovery cylinder rod chamber, rodless cavity and communicates with lift cylinders rod chamber, rodless cavity respectively;

2nd ball valve is closed, and cuts off the connection that the 2nd potential energy reclaims cylinder rodless cavity and potential energy recovering hydraulic system;

2nd potential energy reclaims cylinder and switches to lift cylinders:

The coil " a " of the 3rd solenoid operated directional valve, " b " all dead electricity, cut off the connection that the 2nd potential energy reclaims cylinder rod chamber, rodless cavity and fuel tank;

4th solenoid operated directional valve obtains electric, makes the 2nd potential energy reclaim cylinder rod chamber, rodless cavity and communicates with lift cylinders rod chamber, rodless cavity respectively;

2nd ball valve is closed, and cuts off the connection that the 2nd potential energy reclaims cylinder rodless cavity and potential energy recovering hydraulic system;

2nd stand-by pump starts, and supplements the 2nd potential energy and reclaims cylinder action necessary flow;

The seamless handover method of the potential energy recovery system that the present invention relates under error state (ERST), applicable in the application scenario of lifting and that walking machinery is under stable load and Vnsteady loads state potential energy recovering hydraulic system. Further increase handiness, the reliability of lifting and the application of walking machinery potential energy recovery system, under even nonserviceabling, still can ensure the normal operation of original equipment. Part or all of potential energy can be reclaimed cylinder according to practical situation and switch to lift cylinders or unloaded cylinder by this technology, it is ensured that before and after switching, guarantor's change is not appointed in the operation of equipment, reaches seamless switching object.

Claims (4)

1. one kind for stand-by plant during potential energy recovery system fault, it is characterised in that: it comprises potential energy recovery system, fuel tank, system main pump, lift cylinders, the first potential energy reclaim cylinder, the 2nd potential energy reclaims cylinder, the first solenoid operated directional valve, the 2nd solenoid operated directional valve, the 3rd solenoid operated directional valve, the 4th solenoid operated directional valve, the first ball valve, the 2nd ball valve, the first check valve, the 2nd check valve, the 3rd check valve, safety valve, the first stand-by pump and the 2nd stand-by pump;

The oil suction of system main pump, the first stand-by pump and the 2nd stand-by pump is connected with fuel tank, the oil outlet of system main pump, the first stand-by pump and the 2nd stand-by pump connects the oil-in of the 3rd check valve, the first check valve and the 2nd check valve respectively, 3rd check valve, the first check valve are connected with the oil outlet of the 2nd check valve and are connected with the rodless cavity oil mouth of lift cylinders, the oil-in of safety valve connects the oil outlet of the 3rd check valve, and the oil outlet of safety valve connects fuel tank;

The rod chamber oil mouth that first potential energy reclaims cylinder connects the B mouth of the first solenoid operated directional valve and the A mouth of the 2nd solenoid operated directional valve respectively, and the rodless cavity oil mouth of the first potential energy recovery cylinder connects the A mouth of the first solenoid operated directional valve, the B mouth of the 2nd solenoid operated directional valve and the oil-in of the first ball valve respectively; The T mouth of the first solenoid operated directional valve, the T mouth of the 3rd solenoid operated directional valve are connected with the rod chamber oil mouth of lift cylinders and are connected with fuel tank; The P mouth of the 2nd solenoid operated directional valve is connected with the P mouth of the 4th solenoid operated directional valve and is connected with the rodless cavity oil mouth of lift cylinders, and the T mouth of the 2nd solenoid operated directional valve is connected with the rod chamber oil mouth of lift cylinders with the T mouth of the 4th solenoid operated directional valve and is connected with fuel tank; The oil outlet of the first ball valve connects potential energy recovery system;

The rod chamber oil mouth that 2nd potential energy reclaims cylinder connects the B mouth of the 3rd solenoid operated directional valve and the A mouth of the 4th solenoid operated directional valve respectively, and the rodless cavity oil mouth of the 2nd potential energy recovery cylinder connects the oil-in of the A mouth of the 3rd solenoid operated directional valve, the B mouth of the 4th solenoid operated directional valve and the 2nd ball valve respectively; The oil outlet of the 2nd ball valve connects potential energy recovery system.

2. according to claim 1 for stand-by plant during potential energy recovery system fault, it is characterised in that: described first stand-by pump and the 2nd stand-by pump are toothed gear pump, ram pump or vane pump.

3. the using method for stand-by plant during potential energy recovery system fault according to claim 1 and 2, it is characterised in that, comprise the steps:

Step one: specification and the quantity that maximum operational speed when rising according to lift cylinders and the first potential energy reclaim cylinder, the 2nd potential energy reclaims cylinder, determine that the first potential energy reclaims cylinder, the 2nd potential energy reclaims required peak flow when cylinder rises, to determine the first stand-by pump and the specification of the 2nd stand-by pump:

In formula (1):

Q_1max: the first potential energy reclaims required peak flow when cylinder rises;

n₁: the first potential energy reclaims the quantity of cylinder;

D₁: the first potential energy reclaims cylinder rodless cavity diameter;

v_max: maximum operational speed when lift cylinders rises;

In formula (2):

Q_2max: the 2nd potential energy reclaims required peak flow when cylinder rises

n₂: the 2nd potential energy reclaims the quantity of cylinder;

D₂: the 2nd potential energy reclaims cylinder rodless cavity diameter;

Required peak flow Q when reclaiming cylinder and the recovery cylinder rising of the 2nd potential energy according to the first potential energy_1max��Q_2maxThe specification of first, second stand-by pump can be confirmed;

Step 2: according to Q_1max��Q_2maxThe drive-motor power of the first stand-by pump, the 2nd stand-by pump is determined with system pressure:

In formula (3):

P_1max: drive maximum motor power needed for the first stand-by pump;

��₁: the efficiency of the first stand-by pump;

P: system working pressure, its span is between 13��20MPa;

In formula (4):

P_2max: drive maximum motor power needed for the 2nd stand-by pump;

��₂: the efficiency of the 2nd stand-by pump;

According to the P calculated_1max��P_2maxSelect the first stand-by pump and the suitable drive-motor of the 2nd stand-by pump.

4. the using method for stand-by plant during potential energy recovery system fault according to claim 3, it is characterised in that: in step 2, ��₁����₂Get 0.8��0.9.