CN201239781Y

CN201239781Y - Frequency control rotor sand mixer

Info

Publication number: CN201239781Y
Application number: CNU2008200388731U
Authority: CN
Inventors: 盛建春
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-01
Filing date: 2008-08-01
Publication date: 2009-05-20
Anticipated expiration: 2018-08-01

Abstract

The utility model discloses a frequency control rotor sand mixer which comprises a housing equipped with an upper cover; at least two rotating shafts are arranged on the housing; a motor is mounted on the housing; the motor and the frequency converter adopt the electrical property connection; and the frequency converter changes the frequency of the motor, so that the rotating speed of the motor is changed, therefore, the effect of changing the torque of the rotating shaft is achieved. The utility model has the advantages that through testing the changes of the resistance that the sand mixer rotor meets in a sand mulling period and through automatically regulating the rotating speed of the motor by the frequency converter, the rotating speed of the rotor is changed, thereby achieving the effect that the rotor has different torques under different pressures; and the frequency control rotor sand mixer is ensured to be more suitable to the sand mulling manner of the changes of the physical property during the process of blending sand, so that the purposes of improving the quality of the mulling, guaranteeing the mulling efficiency, and effectively reducing auxiliary material and energy consumption are achieved.

Description

Variable-frequency control rotor roller mill

Technical field

The utility model relates to casting field, particularly a kind of frequency speed-governing rotor puddle mixer.

Background technology

In casting industry, traditional puddle mixer mixes old sand, fresh sand, moulding sand binder and auxiliary material, binding agent and auxiliary material are evenly distributed also be coated on sand grain surface effectively, at present, the mulling process of puddle mixer generally is divided into three phases: advance sand, mix system, shake out, each stage, the resistance that is subjected to during the puddle mixer rotor motion was also different because water is different to the activation of bentonite effect.Do when mixing, the resistance that rotor is subjected to is little; After adding a certain amount of water, because water and bentonitic effect, increasing by the sand viscosity that bentonite wraps up, the resistance of rotor is also increasing, and the waste of energy consumption is bigger; If rotating speed is certain, that may produce and coat the sand grains difficulty, increase the mulling time, thereby influence mulling efficient, and the uniformity of coated sand is also poor, has influenced flowability, the fillibility of molding sand, has reduced bentonitic utilization rate.And the sub-fraction molding sand also can be because of speed necessarily can't effectively be coated on sand grain surface, thereby forms the bentonite granule that is free between the sand grains, and these granules belong to invalid activated clay, cause bentonitic waste.

The utility model content

In order to overcome above defective, the technical problems to be solved in the utility model is: provide a kind of and coat that sand grains is effective, mulling efficient height, variable-frequency control rotor roller mill that energy consumption is low.

The technical scheme that the utility model adopted is: variable-frequency control rotor roller mill, comprise shell, described shell disposes loam cake, at least be provided with two rotating shafts in the described shell, described loam cake is equipped with first motor and second motor, described first motor connects by planetary gearsets with described rotating shaft, described planetary gearsets has center line, the described second motor-driven gear casing rotates along center line, described gear housing connects with loam cake by pivoting support, described rotating shaft is fixedlyed connected with described gear housing, also is provided with frequency converter on the described puddle mixer, and described first motor and described frequency converter adopt and electrically connect.

According to another one embodiment of the present utility model, variable-frequency control rotor roller mill further comprises between described motor and the described planetary gear and is provided with reductor.

According to another one embodiment of the present utility model, variable-frequency control rotor roller mill comprises that further described frequency converter is used to control the frequency of described motor.

According to another one embodiment of the present utility model, variable-frequency control rotor roller mill further comprises and also is provided with the wall scraper plate in the described shell, and this wall scraper plate is used to the outer casing inner wall of swiping, and this wall scraper plate and gear housing are fixedly connected.

According to another one embodiment of the present utility model, variable-frequency control rotor roller mill comprises that further described puddle mixer also comprises hopper, and described hopper has LOAD CELLS.

According to another one embodiment of the present utility model, variable-frequency control rotor roller mill comprises that further described puddle mixer also comprises the door that shakes out, and the described door that shakes out is made by high-abrasive material.

According to another one embodiment of the present utility model, variable-frequency control rotor roller mill further comprises described second motor by gear and the rotation of pivoting support inner ring driven gear casing, and connects with top cover by the pivoting support outer ring.

According to another one embodiment of the present utility model, variable-frequency control rotor roller mill comprises that further described second motor and frequency converter electrically connect.

The beneficial effects of the utility model are: be subjected to the variation of resistance in a mulling cycle by mensuration puddle mixer rotor, rotating speed through the frequency converter self-regulation motor, thereby regulate the rotating speed of rotor, and then be implemented in different resistance lower rotor parts and have different moments of torsion, make variable-frequency control rotor roller mill more meet the mulling mode of sand change in physical properties in mixing the system process, reached and not only improved the mulling quality but also guarantee that mulling efficient can also effectively reduce the purpose of supplementary product onsumption and energy consumption.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the structural representation of preferred embodiment of the present utility model;

Fig. 2 is the door schematic diagram that shakes out;

Fig. 3 is rotating shaft two structural representations.

Among the figure: 1. shell, 2. loam cake, 3. rotating shaft, 31. rotating shafts two, 4. first motor, 5. planetary gearsets, 6. frequency converter, 7. reductor, 8. wall scraper plate, 9. hopper, 10. LOAD CELLS, 11. doors that shake out, 12. second motor, 13. gear housings, 14. pivoting supports, 15. gears, X. center line.

The specific embodiment

With preferred embodiment the utility model is described in further detail in conjunction with the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.

Variable-frequency control rotor roller mill as shown in Figure 1, comprise shell 1, this shell 1 disposes loam cake 2, at least be provided with two rotating shafts 3 in this shell 1, described loam cake 2 is equipped with first motor 4 and second motor 12, described first motor 4 connects by planetary gearsets 5 with described rotating shaft 3, described planetary gearsets 5 has center line X, described second motor, 12 driven wheel casings 13 rotate along center line X, described gear housing 13 connects with loam cake 2 by pivoting support 14, and described rotating shaft 3 is fixedlyed connected with described gear housing 13.

The frequency conversion puddle mixer is provided with frequency converter 6, and described first motor 4 adopts with described frequency converter 6 and electrically connects, and wherein, frequency converter 6 is used to control the frequency of described first motor 4.Measure the resistance that puddle mixer rotating shaft 3 is subjected to by frequency converter 6, automatically regulate the rotating speed of first motor 4, thereby regulate the rotating speed of rotating shaft 3, and then be implemented in different resistance lower rotary shafts 3 and have different moments of torsion, aforesaid way meets the rule of sand change in physical properties in mixing the system process.First motor 4 connects by planetary gearsets 5 with rotating shaft 3, and this kind connecting mode makes rotating shaft 3 rotations; Simultaneously, because rotating shaft 3 is fixedlyed connected with gear housing 13, and second motor, 12 driven wheel casings 13 rotate along center line X, thereby the rotating shaft 3 that can guarantee to be fixed on the gear housing 13 is revolved round the sun along center line X, rotating shaft 3 not only has rotation but also have revolution like this, thereby sand and auxiliary material fully can be mixed.In addition, between first motor 4 and planetary gearsets 5, be provided with reductor 6, can realize the working condition requirement of the low-speed big of rotating shaft 3.

During mulling, shell 1 is the state of sealing, is provided with wall scraper plate 8 in the shell 1, this wall scraper plate 8 be used to swipe binding sand of shell 1 inwall, wall scraper plate 8 is fixedly connected with gear housing 13, drives wall scraper plate 8 along center line X rotation by gear housing 13, and the binding sand of shell on 1 inwall garden week scraped off.Difference according to productivity ratio can be equipped with 2～4 rotating shafts 3.

Preferred second motor 12 of the utility model electrically connects with frequency converter 6, and frequency converter 6 also can be used for controlling the frequency of described second motor 4, thus control rotating shaft 3 revolution and rotational velocities.

As shown in Figure 2, variable-frequency control rotor roller mill also is provided with hopper 9, and hopper 9 has LOAD CELLS 10, and this LOAD CELLS 10 is used for the sand weight in the weighing bucket 9, determines the proportioning of sand and other auxiliary material, has guaranteed the quality of molding sand, has saved auxiliary material.RTM series variable-frequency control rotor roller mill also is provided with the door 11 that shakes out, and because of the door 11 that shakes out often needs to rotate unload sand, the often wearing and tearing of door 11 that cause shaking out 11 are made by high-abrasive material so shake out.In addition, also dispose stirring tools such as blade, pole in the rotating shaft 3 sand and auxiliary material are mixed, (as Fig. 3).

Present puddle mixer divides the three phases mulling: advance sand, mix system, shake out, but find through behind the years of researches, in fact a mixed system cycle of puddle mixer should be divided into five stages, promptly 1, reinforced, 2, smash to pieces, 3, mix, 4, the fluffing of moulding sand, 5, discharging, different to the activation of bentonite effect in each stage owing to water, so the resistance that rotating shaft 3 motions are subjected to also is different.Wherein, in the resistance minimum of 1,2 stage rotating shafts 3, therefore the rotating speed by rapid raising rotating shaft 3 with new old sand, auxiliary material high-speed stirred, (what be equivalent to often say is dried mixed) is mixed; The 3rd stage because water, bentonitic effect, the viscosity of sand is increasing, the resistance of rotating shaft is also increasing, rotating shaft this moment 3 reduces rotating speed rapidly and increases moment of torsion, come mulling with bigger strength, this stage is the critical process that auxiliary materials such as bentonite effectively coat sand grains, sand grains can continue rapid movement if the rotating speed of rotating shaft 3 is constant, at this moment the bentonite that has activated not only coats sand grains difficulty (influencing mulling efficient), the uniformity that coats sand grains is also bad, out-of-shape (influences the flowability and the fillibility of molding sand, reduce bentonitic utilization rate), and sub-fraction also can can't effectively be coated on sand grain surface soon because of speed, thereby form the bentonite granule (these granules belong to invalid activated clay, are bentonitic wastes) that is free between the sand grains; Otherwise, increase moment of torsion if reduce the speed of rotating shaft 3, strong in rotating shaft 3 and under at a slow speed the stirring, activated clay is easy to and is coated on equably on the sand grains, also can not form invalid granule, and not only quality is good to mix the molding sand of making like this, and the saving bentonite, the sand temperature can not raise yet; The rotating speed that the 4th stage continue to be reduced rotating shaft 3 increases moment of torsion, purpose be finish molding sand last mix system and make mix the sand grains that makes fully loose, prevent conglomeration, improve its mobile and fillibility (this process is extremely important); The 5th stage because open door 11 that shakes out, resistance discharges fast, and rotating shaft 3 rotating speeds improve rapidly again so that obtain and shake out, shorten and put the sand time faster.The combination of the time in five stages of variable-frequency control rotor roller mill mulling and rotating shaft 3 rotating speeds can be according to different clients, different requirements is adjusted to moulding-sand property, is satisfying under the prerequisite of client to the molding sand quality requirement, brings into play the efficient of puddle mixer to greatest extent.

With above-mentioned foundation desirable embodiment of the present utility model is enlightenment, and by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the specification, must determine its technical scope according to the claim scope.

Claims

1, variable-frequency control rotor roller mill, comprise shell (1), described shell (1) disposes loam cake (2), it is characterized in that: be provided with two rotating shafts (3) in the described shell (1) at least, described loam cake (2) is equipped with first motor (4) and second motor (12), described first motor (4) connects by planetary gearsets (5) with described rotating shaft (3), described planetary gearsets (5) has center line (X), described second motor (12) driven wheel casing (13) rotates along center line (X), described gear housing (13) connects with loam cake (2) by pivoting support (14), described rotating shaft (3) is fixedlyed connected with described gear housing (13), also be provided with frequency converter (6) on the described puddle mixer, described first motor (4) adopts with described frequency converter (6) and electrically connects.

2, variable-frequency control rotor roller mill as claimed in claim 1 is characterized in that: be provided with reductor (7) between described motor (4) and the described planetary gearsets (5).

3, variable-frequency control rotor roller mill as claimed in claim 1 is characterized in that: described frequency converter (6) is used to control the frequency of described first motor (4).

4, variable-frequency control rotor roller mill as claimed in claim 1 is characterized in that: also be provided with wall scraper plate (8) in the described shell (1), and this wall scraper plate (8) shell (1) inwall that is used to swipe, this wall built-up plate (8) is fixedly connected with gear housing (13).

5, variable-frequency control rotor roller mill as claimed in claim 1 is characterized in that: described puddle mixer also comprises hopper (9), and described hopper (9) has LOAD CELLS (10).

6, variable-frequency control rotor roller mill as claimed in claim 1 is characterized in that: described puddle mixer also comprises the door (11) that shakes out, and the described door (11) that shakes out is made by high-abrasive material.

7, variable-frequency control rotor roller mill as claimed in claim 1 is characterized in that: described second motor (12) is by gear (15) and pivoting support (14) engaged transmission.

8, variable-frequency control rotor roller mill as claimed in claim 1 is characterized in that: described second motor (12) electrically connects with frequency converter (6).