CN205371114U - Coal pulverizer hydraulic loading system - Google Patents
Coal pulverizer hydraulic loading system Download PDFInfo
- Publication number
- CN205371114U CN205371114U CN201620107260.3U CN201620107260U CN205371114U CN 205371114 U CN205371114 U CN 205371114U CN 201620107260 U CN201620107260 U CN 201620107260U CN 205371114 U CN205371114 U CN 205371114U
- Authority
- CN
- China
- Prior art keywords
- loading
- coal pulverizer
- circuit
- pressure
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model provides a coal pulverizer hydraulic loading system, including oil tank, loading return circuit, backpressure return circuit, double gear pump, main motor, load cylinder, loading energy storage ware, backpressure energy storage ware and draining return circuit, the utility model discloses wide application coal electricity, chemical industry, cement, iron and steel, etc. The trade, main function provides the suitable power of milling for the coal pulverizer. The utility model discloses a piston rod of load cylinder and the pull rod of coal pulverizer are connected to transmit hydraulic pressure force for the coal pulverizer, provide the power of milling that meets the requirements. The utility model discloses a coal pulverizer hydraulic loading system optimizes on the hydraulic system basis in early days, has simplified controlling element, has increased the backpressure function, has improved the coal adaptability of coal pulverizer and hydraulic system's environment adaptability.
Description
Technical field
This utility model belongs to technical field of hydraulic, and specifically, this utility model relates to a kind of coal pulverizer hydraulic loading system, it is adaptable to the fields such as coal-fired plant, chemical industry, coal liquifaction, cement, iron and steel.
Background technology
Hydraulic loading system is widely used on the roller ring mills such as coal-fired plant, chemical industry, coal liquifaction, cement, iron and steel, and coal pulverizer hydraulic loading system has constantly been improved and optimized by recent year, but exists such as inferior problems:
1, in running, on mill, coal seam is crossed thin or coal type change is excessive, particularly when raw coal fineness is little, it is easy to occur that coal pulverizer vibration becomes big phenomenon；
2, the cleannes of hydraulic oil do not reach instructions for use, cause system failure rate high, increase maintenance cost.This utility model is precisely in order to solve the problems referred to above and the novel hydraulic loading system that designs.
Utility model content
The purpose of this utility model is in that to provide a kind of coal pulverizer hydraulic loading system, and the coal pulverizer vibration existed at least to solve prior art becomes big technical problem, can solve the problem that the technical problem that the fault rate existed in prior art is high simultaneously.
In order to solve the problems referred to above, this utility model provides a kind of coal pulverizer hydraulic loading system, and its technical scheme is as follows:
A kind of coal pulverizer hydraulic loading system, including fuel tank, is provided with two oil-outs and first oil return opening on described fuel tank；Loading loop, the top in described loading loop is connected with the first oil-out of described fuel tank；Backpressure circuit, the top of described backpressure circuit is connected with the second oil-out of described fuel tank；Duplex gear pump, is arranged on the position, top of described loading loop and described backpressure circuit, for controlling the hydraulic oil in described loading loop or described backpressure circuit；Mair motor, is connected with described duplex gear pump, is used for providing power；Load cylinder, the terminal in described loading loop is connected with the rod chamber of described load cylinder, and the terminal of described backpressure circuit is connected with the rodless cavity of described load cylinder, and the piston rod of described load cylinder and the pull bar of coal pulverizer connect；Load accumulator, be arranged on described loading loop, slow down, for absorbing, the pressure fluctuation that described loading loop produces；Back pressure accumulator, is arranged in described backpressure circuit, slows down, for absorbing, the pressure fluctuation that described backpressure circuit produces；And leakage passage, the top of described leakage passage is connected with the drain tap of described load cylinder, and the terminal of described leakage passage is connected with the first oil return opening of described fuel tank.
Coal pulverizer hydraulic loading system described above, more preferably: also including inherent filtration system, described inherent filtration system is arranged on described fuel tank.
Coal pulverizer hydraulic loading system described above, more preferably: described inherent filtration system includes filtration circuit, and the oil inlet end of described filtration circuit all connects with described fuel tank with oil revolving end；Inherent filtration pump, is arranged on described filtration circuit；Inherent filtration motor, is connected with described inherent filtration pump, is used for providing power；Inherent filtration check valve, is arranged on described filtration circuit, for controlling the trend of hydraulic oil；And filter, it is arranged on described filtration circuit, for removing the impurity of described fuel tank internal.
Coal pulverizer hydraulic loading system described above, more preferably: described load cylinder is three；Described loading loop is provided with three and loads external pipe, is connected with the rod chamber of three described load cylinders respectively；Described backpressure circuit is provided with three back pressure external pipes, is connected with the rodless cavity of three described load cylinders respectively.
Coal pulverizer hydraulic loading system described above, more preferably: also include three raising speeds and regulate flow valve, three described raising speeds regulate flow valve and are separately positioned on three described back pressure external pipes；Regulating flow valve with three reductions of speed, three described reductions of speed regulate the rear that flow valve is separately positioned on three described back pressure external pipes and is positioned at three described raising speeds adjustment flow valves.
Coal pulverizer hydraulic loading system described above, more preferably: also include loading check valve, be arranged on described loading loop.
Coal pulverizer hydraulic loading system described above, more preferably: also include loading proportional pressure control valve, be arranged on described loading loop, for described loading loop is carried out pressure regulation.
Coal pulverizer hydraulic loading system described above, more preferably: also include on-load pressure table, is arranged on loading loop, is used for showing force value；With on-load pressure transmitter, be arranged on the rear loading on loop and being positioned at described on-load pressure table, for detecting and transmit the pressure on described loading loop.
Coal pulverizer hydraulic loading system described above, more preferably: also include back pressure check valve, is arranged in described backpressure circuit.
Coal pulverizer hydraulic loading system described above, more preferably: also include back pressure proportional pressure control valve, is arranged in described backpressure circuit, for described backpressure circuit is carried out pressure regulation.
Analyze it can be seen that compared with prior art, advantage of the present utility model and having the beneficial effects that:
One, the coal pulverizer hydraulic loading system that this utility model provides is connected with described pull bar by the piston rod of load cylinder, thus hydraulic coupling is passed to coal pulverizer, it is provided that satisfactory grinding forces.This coal pulverizer hydraulic loading system is optimized on hydraulic system basis in early days, simplifies control element, adds back pressure function, improves the coal adaptive capacity of coal pulverizer and the adaptive capacity to environment of hydraulic system.
Two, this utility model is provided with six speed and regulates flow valve, a two one group corresponding load cylinder, separate, it is possible to the lifting well regulating grinding roller synchronizes.
Three, each load cylinder of the present utility model is equipped with independent loading accumulator and back pressure accumulator, it is possible to effectively absorb hydraulic shock, reduces vibrations, improves system stability.
Four, thin or ature of coal granularity spy hour is crossed in this utility model coal seam in coal pulverizer, it is possible to by improving back pressure, overcome part grinding roller to conduct oneself with dignity, and slows down grinding machine vibration.
Five, coal pulverizer hydraulic loading system of the present utility model has independent inherent filtration system, improve scene maintenance convenience, filtering accuracy up to 5u, long-time continual filtration, the hydraulic oil purity in fuel tank can be effectively improved, the guarantee provided is provided for system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the coal pulverizer hydraulic loading system of this utility model preferred embodiment.
Fig. 2 is the line alignment figure of this utility model normal operating conditions.
Fig. 3 is the line alignment figure that this utility model rises grinding roller state.
Fig. 4 is the line alignment figure that grinding roller state drops in this utility model.
In figure: 1-mair motor；2-duplex gear pump；3-back pressure check valve；4-loads check valve；5-controls check valve；6-loads proportional pressure control valve；7-back pressure proportional pressure control valve；8-back-pressure table；9-on-load pressure table；101-back-pressure transmitter；102-on-load pressure transmitter；111-the first raising speed regulates flow valve；112-the second raising speed regulates flow valve；113-the 3rd raising speed regulates flow valve；114-the first reduction of speed regulates flow valve；115-the second reduction of speed regulates flow valve；116-the 3rd reduction of speed regulates flow valve；121-the first backpressure overflow valve；122-the second backpressure overflow valve；123-the 3rd backpressure overflow valve；131-first loads accumulator；132-second loads accumulator；133-the 3rd loads accumulator；141-the first load cylinder；142-the second load cylinder；143-the 3rd load cylinder；151-the first back pressure accumulator；152-the second back pressure accumulator；153-the 3rd back pressure accumulator；16-return check valve；17-cooler；18-bitubular return filter；19-inherent filtration motor；20-inherent filtration pump；21-inherent filtration check valve；22-filter；23-fuel tank；231-the first oil-out；232-the second oil-out；233-the first oil return opening；234-the second oil return opening；235-the 3rd oil return opening.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described in further details.
As it is shown in figure 1, the coal pulverizer hydraulic loading system of this utility model preferred embodiment mainly includes fuel tank 23, fuel tank 23 is provided with two oil-outs and the first oil return opening 233；Loading loop, the top loading loop is connected with the first oil-out 231 of fuel tank 23；Backpressure circuit, the top of backpressure circuit is connected with the second oil-out 232 of fuel tank 23；Duplex gear pump 2, is arranged on the position, top loading loop and backpressure circuit, for the hydraulic oil in controlled loading loop or backpressure circuit；Mair motor 1, is connected with duplex gear pump 2, is used for providing power；Load cylinder, containing piston rod, the one end wherein having piston rod is rod chamber, and the other end of piston-rodless is rodless cavity；The terminal loading loop is connected with the rod chamber of load cylinder, and the terminal of backpressure circuit is connected with the rodless cavity of load cylinder, and the piston rod of load cylinder and the pull bar of coal pulverizer connect；Load accumulator, be arranged on loading loop, load, for absorbing to slow down, the pressure fluctuation that loop produces；Back pressure accumulator, is arranged in backpressure circuit, slows down, for absorbing, the pressure fluctuation that backpressure circuit produces；And leakage passage, the top of leakage passage is connected with the oil-out of load cylinder, and the terminal of leakage passage is connected with the first oil return opening 233 of fuel tank 23, the hydraulic oil flow oil sump tank 23 taken out of when being mainly piston rod movement.
Wherein, duplex gear pump 2 is containing high-pressure pump and low-lift pump, and wherein high-pressure pump is connected with loading loop, is used for controlling hydraulic oil and enters loading loop；Low-lift pump is connected with backpressure circuit, is used for controlling hydraulic oil and enters backpressure circuit.
Sum it up, the coal pulverizer hydraulic loading system that this utility model provides is connected with the pull bar of coal pulverizer by the piston rod of load cylinder, thus hydraulic coupling is passed to coal pulverizer, it is provided that satisfactory grinding forces.This hydraulic loading system is optimized on hydraulic system basis in early days, simplifies control element, adds back pressure function, improves the coal adaptive capacity of coal pulverizer and the adaptive capacity to environment of hydraulic system.
In order to improve the cleannes of hydraulic oil, as shown in Figure 1, Figure 2 and Figure 3, this utility model also includes inherent filtration system, and in order to the hydraulic oil in fuel tank 23 to be filtered, inherent filtration system is arranged on fuel tank 23.As shown in Figure 1, Figure 2 and Figure 3, it is preferred to, inherent filtration system includes filtration circuit, and the oil inlet end of filtration circuit all connects with fuel tank 23 with oil revolving end；Inherent filtration pump 20, is arranged on filtration circuit；Inherent filtration motor 19, is connected with inherent filtration pump 20, is used for providing power；Inherent filtration check valve 21, is arranged on filtration circuit, for controlling the trend of hydraulic oil；With filter 22, be arranged on filtration circuit, for removing the impurity of fuel tank internal.More preferably, filter 22 is positioned at the rear portion of inherent filtration check valve 21, and inherent filtration check valve 21 is positioned at the rear portion of inherent filtration pump 20.Much further preferably from, the filtering accuracy of the filter element of filter 22 is 5u.Inherent filtration system of the present utility model is along with loading system one piece operation, thus the impurity within high-efficient cleaning oil removal box 23, improves the cleannes of hydraulic oil.
In order to provide hydraulic coupling for more coal pulverizer, as shown in Figures 1 to 4, load cylinder of the present utility model is three, respectively the first load cylinder the 141, second load cylinder 142 and the 3rd load cylinder 143；Load loop and be provided with three loading external pipes arranged side by side, be connected with the rod chamber of first load cylinder the 141, second load cylinder 142 and the 3rd load cylinder 143 respectively；Backpressure circuit is provided with three back pressure external pipes arranged side by side, is connected with the rodless cavity of first load cylinder the 141, second load cylinder 142 and the 3rd load cylinder 143 respectively.As shown in Figures 1 to 4, it is preferred to, load accumulator and be also three, respectively first load accumulator the 131, second loading accumulator 132 and the 3rd loading accumulator 133；Three loading accumulators are separately positioned on three and load on external pipe, load, for absorbing to slow down, the pressure fluctuation that loop produces.As shown in Figures 1 to 4, it is preferred to, back pressure accumulator is also three, respectively the first back pressure accumulator the 151, second back pressure accumulator 152 and the 3rd back pressure accumulator 153；Three back pressure accumulators are separately positioned on three back pressure external pipes, slow down, for absorbing, the pressure fluctuation that backpressure circuit produces.
In order to the hydraulic fluid flow rate of backpressure circuit is adjusted, as shown in Figures 1 to 4, this utility model also includes three raising speeds and regulates flow valve, respectively the first raising speed regulates flow valve the 111, second raising speed and regulates flow valve 112 and the 3rd raising speed adjustment flow valve 113, and three raising speeds regulate flow valves and are separately positioned on three back pressure external pipes.As shown in Figures 1 to 4, this utility model also includes three reductions of speed and regulates flow valve, respectively the first reduction of speed regulates flow valve the 114, second reduction of speed and regulates flow valve 115 and the 3rd reduction of speed adjustment flow valve 116, and three reductions of speed regulate the rear that flow valves are separately positioned on three back pressure external pipes and are positioned at three raising speeds adjustment flow valves.As shown in Figures 1 to 4, this utility model also includes three backpressure overflow valves, respectively the first backpressure overflow valve the 121, second backpressure overflow valve 122 and the 3rd backpressure overflow valve 123, three backpressure overflow valves are separately positioned on three back pressure external pipes and are positioned at three reductions of speed and regulate the rear of flow valve.This utility model regulates flow valve by raising speed, reduction of speed regulates flow valve and the flow of back pressure external pipe is adjusted；By three backpressure overflow valves, this utility model guarantees that the pressure of three back pressure external pipes is in a safe condition.
In order to prevent the hydraulic oil loading loop from oil return situation occurring, as it is shown in figure 1, this utility model also includes loading check valve 4, it is arranged on loading loop, and is connected directly between the rear of duplex gear pump 2.
For the ease of to the control loading circuit pressure, as it is shown in figure 1, this utility model also includes loading proportional pressure control valve 6, being arranged on loading loop, for loading loop is carried out pressure regulation.It is preferably, loads proportional pressure control valve 6 and be positioned at the rear loading check valve 4.More preferably load the adjustment pressure limit of proportional pressure control valve 6 between 0～15Mpa.For the ease of the overflowing liquid force feed loading proportional pressure control valve 6 is controlled, as shown in Figures 1 to 4, this utility model also includes overflow oil circuit, and the first top of overflow oil circuit communicates with the effluent head loading proportional pressure control valve 6, and the terminal of overflow oil circuit communicates with the second oil return opening 234 of fuel tank 23；When the pressure loading proportional pressure control valve 6 exceedes setting value, then can pass through this overflow oil circuit and return in fuel tank 23, reach the effect of overflow oil return.Return check valve 16, is arranged on overflow oil circuit；Cooler 17, is arranged on overflow oil circuit and is positioned at the rear of return check valve 16, for overflowing liquid force feed is lowered the temperature；With bitubular return filter 18, be arranged on overflow oil circuit and be positioned at the rear of cooler 17, for overflowing liquid force feed is filtered.Being additionally provided with drain tap loading on proportional pressure control valve 6, drain tap is communicated with the 3rd oil return opening 235 of fuel tank 23 by draining oil circuit.
For the ease of checking the force value loaded on loop, as it is shown in figure 1, this utility model also includes on-load pressure table 9, it is arranged on loading loop, is used for showing force value.Being preferably, on-load pressure table 9 is positioned at the rear loading proportional pressure control valve 6.Load the force value in loop for the ease of detection, as it is shown in figure 1, this utility model also includes on-load pressure transmitter 102, be arranged on loading loop, load the pressure on loop for detecting with distant place transmission.Being preferably, on-load pressure transmitter 102 is positioned at the rear of on-load pressure table 9.
In order to prevent the hydraulic oil of backpressure circuit from oil return situation occurring, as it is shown in figure 1, this utility model also includes back pressure check valve 3, it is arranged in backpressure circuit, and is connected directly between the rear of duplex gear pump 2.
For the ease of the control to backpressure circuit pressure, as it is shown in figure 1, this utility model also includes back pressure proportional pressure control valve 7, it is arranged in backpressure circuit, for backpressure circuit is carried out pressure regulation.Being preferably, back pressure proportional pressure control valve 7 is positioned at the rear of back pressure check valve 3.More preferably the adjustment pressure limit of back pressure proportional pressure control valve 7 is between 0～3Mpa.For the ease of the overflowing liquid force feed of back pressure proportional pressure control valve 7 is controlled, as shown in Figures 1 to 4, the second top of overflow oil circuit of the present utility model communicates with the effluent head of back pressure proportional pressure control valve 7.When the pressure loading proportional pressure control valve 7 exceedes setting value, then can pass through this overflow oil circuit and return in fuel tank 23, reach the effect of overflow oil return.Being additionally provided with drain tap on back pressure proportional pressure control valve 7, drain tap is communicated with the 3rd oil return opening 235 of fuel tank 23 by draining oil circuit.
For the ease of checking the force value in backpressure circuit, as it is shown in figure 1, this utility model also includes back-pressure table 8, it is arranged in backpressure circuit, is used for showing force value.Being preferably, back-pressure table 8 is positioned at the rear of back pressure proportional pressure control valve 7.For the ease of detecting the force value of backpressure circuit, as it is shown in figure 1, this utility model also includes back-pressure transmitter 101, it is arranged in backpressure circuit, transmits the pressure in backpressure circuit for detecting with a distant place.Being preferably, back-pressure transmitter 101 is positioned at the rear of back-pressure table 8.
As shown in Figures 1 to 4, as to the hydraulic oil that the effluent head loading proportional pressure control valve 6 and back pressure proportional pressure control valve 7 flows out again with, this utility model also includes skimmer circuit, the entrance point of skimmer circuit is connected with the effluent head loading proportional pressure control valve 6 and back pressure proportional pressure control valve 7 respectively, the port of export of skimmer circuit is connected with loading loop, with control check valve 5, it is arranged on skimmer circuit, for preventing the hydraulic oil loading loop by skimmer circuit stream to loading in proportional pressure control valve 6 and back pressure proportional pressure control valve 7.
As shown in Figures 1 to 4, below operation principle of the present utility model is described in detail:
Normal operating conditions:
As shown in Figure 1 and Figure 2, hydraulic oil in fuel tank 23 is entered by the high-pressure pump in duplex gear pump 2 and loads loop, through loading check valve 4, loaded external pipe by three and respectively enter the rod chamber of first load cylinder the 141, second load cylinder 142 and the 3rd load cylinder 143, thus at rod chamber build-up pressure, and by the piston rod of three load cylinders, hydraulic coupling is passed to the grinding roller of coal pulverizer, it is converted into grinding forces；On-load pressure is set up by loading proportional pressure control valve 6, regulate pressure at 0～15Mpa, real-time online adjustment is carried out by control room DCS according to pulverizer capacity, when exceeding loading proportional pressure control valve 6 set pressure, hydraulic oil, through loading proportional pressure control valve 6 overflow, backs into fuel tank 23 by return check valve 16, cooler 17, bitubular return filter 18.Load the pressure fluctuation produced in loop to be absorbed slowed down by first loading accumulator the 131, second loading accumulator 132 and the 3rd loading accumulator 133.
Hydraulic oil in fuel tank 23 enters backpressure circuit by the low-lift pump in duplex gear pump 2, through back pressure check valve 3, enter three back pressure external pipes and (namely enter the first back pressure external pipe by first raising speed flow control valve the 111, first deceleration flow control valve 114, enter the second back pressure external pipe by second raising speed flow control valve the 112, second deceleration flow control valve 115, enter the 3rd back pressure external pipe by the 3rd raising speed flow control valve the 113, the 3rd deceleration flow control valve 116)；Entered the rodless cavity of three load cylinders by three back pressure external pipes, thus at rodless cavity build-up pressure, and by the piston rod of three load cylinders, hydraulic coupling is passed to the grinding roller of coal pulverizer, offset a part of grinding forces；Back-pressure is set up by back pressure proportional pressure control valve 7, regulate pressure at 0～3MPa, real-time online adjustment is carried out by control room DCS according to pulverizer capacity situation, when exceeding back pressure proportional pressure control valve 7 set pressure, hydraulic oil, through back pressure proportional pressure control valve 7 overflow, backs into fuel tank 23 by return check valve 16, cooler 17, bitubular return filter 18.The pressure fluctuation produced in backpressure circuit is absorbed by first back pressure accumulator the 151, second back pressure accumulator 152 and the 3rd back pressure accumulator 153 and slows down.
Rise grinding roller state:
As shown in Figure 1, Figure 3, loading proportional pressure control valve 6 set pressure loading loop is 0, hydraulic oil in fuel tank 23 is entered by the high-pressure pump in duplex gear pump 2 and loads loop, backs into fuel tank through loading check valve 4, loading proportional pressure control valve 6, return check valve 16, cooler 17, bitubular return filter 18.
Hydraulic oil in fuel tank 23 enters backpressure circuit by the low-lift pump in duplex gear pump 2, through back pressure check valve 3, enter three back pressure external pipes and (namely enter the first back pressure external pipe by first raising speed flow control valve the 111, first deceleration flow control valve 114, enter the second back pressure external pipe by second raising speed flow control valve the 112, second deceleration flow control valve 115, enter the 3rd back pressure external pipe by the 3rd raising speed flow control valve the 113, the 3rd deceleration flow control valve 116)；Being entered the rodless cavity of three load cylinders by three back pressure external pipes, thus at rodless cavity build-up pressure, and by the piston rod of load cylinder, hydraulic coupling is passed to the grinding roller of coal pulverizer, after hydraulic coupling overcomes the equipment self-weights such as grinding roller, grinding roller lifts；Back-pressure is set up by back pressure proportional pressure control valve 7, regulate pressure at 5～8MPa, when exceeding back pressure proportional pressure control valve 7 set pressure, hydraulic oil, through back pressure proportional pressure control valve 7 overflow, backs into fuel tank 23 by return check valve 16, cooler 17, bitubular return filter 18.Rise roller speed to be controlled by first raising speed flow control valve the 111, second raising speed flow control valve 112 and the 3rd raising speed flow control valve 113.
Grinding roller state drops:
As Figure 1 and Figure 4, loading proportional pressure control valve 6 set pressure loading loop is 0, hydraulic oil in fuel tank 23 is entered by the high-pressure pump in duplex gear pump 2 and loads loop, backs into fuel tank 23 through loading check valve 4, loading proportional pressure control valve 6, return check valve 16, cooler 17, bitubular return filter 18.
Hydraulic oil in fuel tank 23 enters backpressure circuit by the low-lift pump in duplex gear pump 2, through back pressure check valve 3, enter three back pressure external pipes and (namely enter the first back pressure external pipe by first raising speed flow control valve the 111, first deceleration flow control valve 114, enter the second back pressure external pipe by second raising speed flow control valve the 112, second deceleration flow control valve 115, enter the 3rd back pressure external pipe by the 3rd raising speed flow control valve the 113, the 3rd deceleration flow control valve 116)；Entered the rodless cavity of three load cylinders by three back pressure external pipes, thus at rodless cavity build-up pressure, and by the piston rod of load cylinder, hydraulic coupling passed to the grinding roller of coal pulverizer, hydraulic coupling less than after the equipment self-weights such as grinding roller, grinding roller decline；Back-pressure is set up by back pressure proportional pressure control valve 7, regulate pressure at 3～4MPa, when exceeding back pressure proportional pressure control valve 7 set pressure, hydraulic oil, through back pressure proportional pressure control valve 7 overflow, backs into fuel tank 23 by return check valve 16, cooler 17, bitubular return filter 18.Drop roller speed to be controlled by first deceleration flow control valve the 114, second deceleration flow control valve 115 and the 3rd deceleration flow control valve 116.
Inherent filtration System Working Principle of the present utility model: as it is shown in figure 1, hydraulic oil backs into fuel tank after inherent filtration pump 20, inherent filtration check valve 21, filter 22.The filtering accuracy of filter element, up to 5u, along with loading system one piece operation, the impurity within high-efficient cleaning oil removal box 23, improves the cleannes of hydraulic oil.
Analyze it can be seen that compared with prior art, advantage of the present utility model and having the beneficial effects that:
One, the coal pulverizer hydraulic loading system that this utility model provides is connected with the pull bar of coal pulverizer by the piston rod of load cylinder, thus hydraulic coupling is passed to coal pulverizer, it is provided that satisfactory grinding forces.This hydraulic loading system is optimized on hydraulic system basis in early days, simplifies control element, adds back pressure function, improves the coal adaptive capacity of coal pulverizer and the adaptive capacity to environment of hydraulic system.
Two, this utility model is provided with six speed and regulates flow valve, a two one group corresponding load cylinder, separate, it is possible to the lifting well regulating grinding roller synchronizes.
Three, each load cylinder of the present utility model is equipped with independent loading accumulator and back pressure accumulator, it is possible to effectively absorb hydraulic shock, reduces vibrations, improves system stability.
Four, thin or ature of coal granularity spy hour is crossed in this utility model coal seam in coal pulverizer, it is possible to by improving back pressure, overcome part grinding roller to conduct oneself with dignity, and slows down grinding machine vibration.
Five, coal pulverizer hydraulic loading system of the present utility model has independent inherent filtration system, improve scene maintenance convenience, filtering accuracy up to 5u, long-time continual filtration, the hydraulic oil purity in fuel tank 23 can be effectively improved, the guarantee provided is provided for system.
As known by the technical knowledge, this utility model can be realized by the embodiment of other essence without departing from its spirit or essential feature.Therefore, embodiment disclosed above, for each side, all it is merely illustrative, is not only.All all it is included in the utility model within the scope of this utility model or in the change being equal in scope of the present utility model.
Claims (10)
1. a coal pulverizer hydraulic loading system, it is characterised in that including:
Fuel tank, is provided with two oil-outs and the first oil return opening on described fuel tank；
Loading loop, the top in described loading loop is connected with the first oil-out of described fuel tank；
Backpressure circuit, the top of described backpressure circuit is connected with the second oil-out of described fuel tank；
Duplex gear pump, is arranged on the position, top of described loading loop and described backpressure circuit, for controlling the hydraulic oil in described loading loop or described backpressure circuit；
Mair motor, is connected with described duplex gear pump, is used for providing power；
Load cylinder, the terminal in described loading loop is connected with the rod chamber of described load cylinder, and the terminal of described backpressure circuit is connected with the rodless cavity of described load cylinder, and the piston rod of described load cylinder and the pull bar of coal pulverizer connect；
Load accumulator, be arranged on described loading loop, slow down, for absorbing, the pressure fluctuation that described loading loop produces；
Back pressure accumulator, is arranged in described backpressure circuit, slows down, for absorbing, the pressure fluctuation that described backpressure circuit produces；With
Leakage passage, the top of described leakage passage is connected with the drain tap of described load cylinder, and the terminal of described leakage passage is connected with the first oil return opening of described fuel tank.
2. coal pulverizer hydraulic loading system according to claim 1, it is characterised in that also include:
Inherent filtration system, described inherent filtration system is arranged on described fuel tank.
3. coal pulverizer hydraulic loading system according to claim 2, it is characterised in that described inherent filtration system includes:
Filtration circuit, the oil inlet end of described filtration circuit all connects with described fuel tank with oil revolving end；
Inherent filtration pump, is arranged on described filtration circuit；
Inherent filtration motor, is connected with described inherent filtration pump, is used for providing power；
Inherent filtration check valve, is arranged on described filtration circuit, for controlling the trend of hydraulic oil；With
Filter, is arranged on described filtration circuit, for removing the impurity of described fuel tank internal.
4. coal pulverizer hydraulic loading system according to claim 1 and 2, it is characterised in that:
Described load cylinder is three；
Described loading loop is provided with three and loads external pipe, is connected with the rod chamber of three described load cylinders respectively；
Described backpressure circuit is provided with three back pressure external pipes, is connected with the rodless cavity of three described load cylinders respectively.
5. coal pulverizer hydraulic loading system according to claim 4, it is characterised in that also include:
Three raising speeds regulate flow valve, and three described raising speeds regulate flow valve and are separately positioned on three described back pressure external pipes；With
Three reductions of speed regulate flow valve, and three described reductions of speed regulate the rear that flow valve is separately positioned on three described back pressure external pipes and is positioned at three described raising speeds adjustment flow valves.
6. coal pulverizer hydraulic loading system according to claim 1 and 2, it is characterised in that also include:
Load check valve, be arranged on described loading loop.
7. coal pulverizer hydraulic loading system according to claim 1 and 2, it is characterised in that also include:
Load proportional pressure control valve, be arranged on described loading loop, for described loading loop is carried out pressure regulation.
8. coal pulverizer hydraulic loading system according to claim 1 and 2, it is characterised in that also include:
On-load pressure table, is arranged on loading loop, is used for showing force value；With
On-load pressure transmitter, is arranged on the rear loading on loop and being positioned at described on-load pressure table, for detecting and transmit the pressure on described loading loop.
9. coal pulverizer hydraulic loading system according to claim 1 and 2, it is characterised in that also include:
Back pressure check valve, is arranged in described backpressure circuit.
10. coal pulverizer hydraulic loading system according to claim 1 and 2, it is characterised in that also include:
Back pressure proportional pressure control valve, is arranged in described backpressure circuit, for described backpressure circuit is carried out pressure regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620107260.3U CN205371114U (en) | 2016-02-02 | 2016-02-02 | Coal pulverizer hydraulic loading system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620107260.3U CN205371114U (en) | 2016-02-02 | 2016-02-02 | Coal pulverizer hydraulic loading system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205371114U true CN205371114U (en) | 2016-07-06 |
Family
ID=56264318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620107260.3U Active CN205371114U (en) | 2016-02-02 | 2016-02-02 | Coal pulverizer hydraulic loading system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205371114U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438553A (en) * | 2016-09-17 | 2017-02-22 | 北京电力设备总厂有限公司 | Novel hydraulic loading system for coal mill |
| CN106762875A (en) * | 2017-01-22 | 2017-05-31 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's coal pulverizer hydraulic oil system and its start-up and shut-down control method |
| CN106762902A (en) * | 2016-12-20 | 2017-05-31 | 河北大唐国际唐山热电有限责任公司 | A kind of coal pulverizer oil supply system frequency conversion loading system |
-
2016
- 2016-02-02 CN CN201620107260.3U patent/CN205371114U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438553A (en) * | 2016-09-17 | 2017-02-22 | 北京电力设备总厂有限公司 | Novel hydraulic loading system for coal mill |
| CN106762902A (en) * | 2016-12-20 | 2017-05-31 | 河北大唐国际唐山热电有限责任公司 | A kind of coal pulverizer oil supply system frequency conversion loading system |
| CN106762875A (en) * | 2017-01-22 | 2017-05-31 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's coal pulverizer hydraulic oil system and its start-up and shut-down control method |
| CN106762875B (en) * | 2017-01-22 | 2018-11-27 | 华北电力科学研究院有限责任公司 | A kind of thermal power plant's coal pulverizer hydraulic oil system and its start-up and shut-down control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205371114U (en) | Coal pulverizer hydraulic loading system | |
| CN204344992U (en) | Load sensing multi-way valve, load sensitive system and excavator | |
| CN104074825B (en) | Two-way choice type interflow load-transducing multi-way valve | |
| CN201461604U (en) | Double-station hydraulic jacking system for RH steel ladles | |
| CN103551917A (en) | Main shaft gear cooling protection device of numerical control gantry machine tool | |
| CN102030265B (en) | Crane hydraulic system for load sensitive ship | |
| CN202851480U (en) | Cooling bed skirting board hydraulic control device | |
| CN103032020B (en) | Hydraulic feeding system of full-automatic top drive drilling machine | |
| CN201874914U (en) | Balance valve bank of variable-amplitude oil cylinder system | |
| CN201823942U (en) | High-pressure internal jetting system for spindle | |
| CN201155504Y (en) | Pressure, flow quantity adjustable oil supply loop | |
| CN209096810U (en) | Hydraulic integrated control device for mine car steering system and box body lifting system | |
| CN103306642A (en) | Numerical control energy-saving and rodless type pumping unit | |
| CN203196691U (en) | Roller type medium-speed mill | |
| CN106438553A (en) | Novel hydraulic loading system for coal mill | |
| CN202392214U (en) | Piston-type cavitation-preventing adjustable reducing valve with large pressure difference | |
| CN205388067U (en) | Former coal bunker loosening machine hydraulic oil temperature cooling system | |
| CN104747371A (en) | Wind turbine generator hydraulic braking power device with electronic control wind wheel locking effect | |
| CN204704187U (en) | Overload unloading valve | |
| CN102295199B (en) | Power pump station for hydraulic elevator/hydraulic lift | |
| CN104595287B (en) | Energy-reclaiming constant deceleration hydraulic station | |
| CN103660061A (en) | Hydraulic control apparatus for internal mixer | |
| CN203542229U (en) | Spindle gear cooling protection device of numerical control gantry machine tool | |
| CN201412400Y (en) | Hydraulic control device of turnover mechanism and turnover mechanism | |
| CN107420356A (en) | A kind of energy-saving hydraulic pumping plant for TRT fast cut valves |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |