A safety type twin shaft adjustable speed water pump
Technical field
The present invention relates to a kind of water cooling system of engine, particularly relate to a kind of arrangements for speed regulation that utilize and control the adjustable speed water pump that impeller has different rotating speeds.When arrangements for speed regulation damage, will convert the full speed operation of ordinary straight expelling water pump to, play the effect of safety control.
Background technique
The working principle of existing water pump is: motor is driven water pump bearing and is fixed on the wheel rotation on water pump spindle by belt pulley, the startup of motor means the operation of water pump, cooling liquid in water pump is driven rotation together by impeller, under the effect of centrifugal force, be thrown toward the edge of water pump cover, produce certain pressure simultaneously, then from water outlet or water pipe, flow out, the center of impeller is pressure decreased because cooling liquid is thrown out of, cooling liquid in water tank is inhaled in impeller through water pipe under the differential pressure action at unit fixed on water pump suction and impeller center, realize the reciprocation cycle of cooling liquid.
Yet, motor has an optimum working temperature interval, thereby do not need motor to be cooled always, for example, when motor just starts, the operating temperature of motor is still low, at this moment water pump just drives liquid circulation always, and extended the preheat time of motor, is unfavorable for saving energy and reduce the cost, low-carbon environment-friendly; When water temperature is elevated to uniform temperature, or from the condition of high temperature, carry out cooling until be reduced to uniform temperature, reach the optimum working temperature of motor, the optimum Working of guarantee motor, wearing and tearing or the scuffing of cylinder bore under hot state under the cold state of minimizing motor damage phenomenon.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides and a kind ofly can control impeller according to engine operation situation and there is different rotating speeds, adjustable speed water pump that working efficiency is higher, when arrangements for speed regulation damage, will convert the full speed operation of ordinary straight expelling water pump to, play the effect object of safety control.
This safety type twin shaft adjustable speed water pump of the present invention, comprise driving shaft 4, impeller 13, water pump shell 11, driving shaft 4 is by bearing and water pump shell 11 pivot joints, characterized by further comprising driven shaft 12, driven shaft 12 coincides with the shaft axis of driving shaft 4, driven shaft 12 is also by bearing and water pump shell 11 pivot joints, and impeller 13 is fixed on driven shaft 12 one end away from driving shaft 4, and driving shaft 4 is connected by safety speed regulating device with driven shaft 12.During this safety speed regulating device busy by the rotating speed of driving shaft do not transmit or only transmit a part to driven shaft, when it breaks down, the rotating speed of driving shaft is all passed to driven shaft.Adopt this technological scheme, changed the mode that in prior art, generally the water pump vane of employing directly drives by active axis, and adopted impeller to be fixedly assemblied in and the horizontal arranged concentric of driving shaft and disconnection mutually; By the part of not transmitting or only transmit of the rotating speed of driving shaft being connected to driven shaft, the safety speed regulating device that the rotating speed of driving shaft all passed to driven shaft when it breaks down when its work, thereby the rotation of control driven shaft and then control are fixed on the speed governing that the rotation of the impeller on driven shaft realizes water pump, speed adjustable range can be from 0-100% for driving shaft, namely can realize the stopping operating of driven shaft, 100% and rotate at full speed or low speed transfer.And when safety speed regulating device breaks down and damages, this adjustable speed water pump can normal work as ordinary straight expelling water pump, has embodied Security.Compared with prior art, solved water pump always with the difficult problem of engine synchronization running, can control impeller according to engine operation situation and there is different rotating speeds, adjustable speed water pump that working efficiency is higher.
Further, this safety type twin shaft adjustable speed water pump, also comprise upper mounted plate 15 and bottom plate 16, on bottom plate 16, arrange and can hold through hole that driven shaft 12 passes affixed with water pump shell 11, upper mounted plate 15 and bottom plate 16 are affixed and form cavity, thereby described driven shaft 12 is by bearing and bottom plate 16 pivot joints and water pump shell 11 pivot joints; Thereby described driving shaft 4 is by bearing and upper mounted plate 15 pivot joints and water pump shell 11 pivot joints; Safety speed regulating device is positioned at upper mounted plate 15 and forms cavity with bottom plate 16.Because bottom plate 16 is by being fixed on water pump shell; upper mounted plate 15 is affixed with bottom plate 16 again; adopt this technological scheme; reduced the complexity of water pump shell structure; reduce costs, raise the efficiency, ease of assembly, dismounting and maintenance; safety speed regulating device is placed in to upper mounted plate 15 simultaneously and forms in cavity and protect with bottom plate 16, be conducive to safety speed regulating device reliability of operation and Security.
Further, this safety type twin shaft adjustable speed water pump, described safety speed regulating device comprises driving disc 5, spring sheet 6, adhesive dish 7, driven disc 8, coil 9, annular permanent magnet 10, iron core 14, and driving disc 5 is fixed on driving shaft 4 one end near driven shaft 12; Driven disc 8 is fixed on driven shaft 12 one end near driving shaft 4; Between driving disc 5 and driven disc 8, adhesive dish 7 is set; Adhesive dish 7 is fixed on driving disc 5 by spring sheet 6 and is relative with driven disc 8; Iron core 14 is divided into the outer iron core away from the interior iron core of driven disc 8 and close driven disc 8, and annular permanent magnet 10 is set between interior iron core and outer iron core, and coil 9 is set in the circumferential grooves of outer iron core, and outer iron core and bottom plate 16 are affixed.When coil 9 energising, iron core 14 produces magnetic field, offsets with the magnetic field of annular permanent magnet 10, between driven disc 8 and adhesive dish 7, has gap, means between driving shaft 4 and driven shaft 12 and does not have moment of torsion transmission, and water pump quits work; When coil 9 power-off or safety speed regulating device break down and damage two kinds of situations, iron core 14 does not produce magnetic field, the magnetic field of annular permanent magnet 10 is pulled together adhesive dish 7 and driven disc 8, means between driving shaft 4 and driven shaft 12 and has moment of torsion transmission, water pump full speed operation.Adopt this technological scheme, simple in structure, can realize automobile mounted computer ECU the Intelligent electric of water pump is controlled, can control the unlatching of water pump in good time and stop, simultaneously when safety speed regulating device breaks down and damages, this adjustable speed water pump can normal work as ordinary straight expelling water pump, has embodied Security.
Further, this safety type twin shaft adjustable speed water pump also arranges a circle electromagnetic induction ring 18 in the outer ring of driving disc 5, on the side in the outer ring of driven disc 8 near driving disc 5, inlays several permanent magnets 17, and permanent magnet 17 is relative with electromagnetic induction ring 18 gaps.Can also be to inlay several permanent magnets 17 on the side near driven disc 8, outer ring at driving disc 5, a circle electromagnetic induction ring 18 is set in the outer ring of driven disc 8, permanent magnet 17 be relative with electromagnetic induction ring 18 gaps.Adopt this technological scheme, electromagnetic induction ring 18 produces magnetic force with permanent magnet 17 and drives water pumps with the 30%-40% speed operation of driving shaft rotating speed by driven disc 8 and driven shaft 12, realized water pump except stop with full speed two states also have the working state of the third transfer.
Further, this safety type twin shaft adjustable speed water pump, described annular permanent magnet 10 is monoblock ring magnet.Adopt that this technological scheme is simple in structure, cost is lower, easy for installation.
Further, this safety type twin shaft adjustable speed water pump, described annular permanent magnet 10 forms for several magnet monomer homonymy homopolarity annular array.Described homonymy homopolarity refers to that each magnet monomer is the N utmost point or is the S utmost point in the side near interior iron core, can not replace or irregular distribution.Adopt this technological scheme according to different consumed powers, to configure quantity and different magnetic force magnet monomers.
Further, the polarity of two permanent magnets of arbitrary neighborhood (17) in several permanent magnets 17 that driving disc 5 or driven disc 8 are inlayed is above contrary, namely the N utmost point of several permanent magnets 17 and the S utmost point are alternately distributed, form several little closed magnetic fields, can produce electromagnetic induction with electromagnetic induction ring 18 corresponding thereto, thereby produce soft drive power.
Further, this safety type twin shaft adjustable speed water pump, free end and the gear of described driving shaft 4 are affixed.The automobile that adopts this technological scheme to adapt to utilize gear that water pump power is provided.
Further, this safety type twin shaft adjustable speed water pump, free end and the belt pulley of described driving shaft 4 are affixed.The automobile that adopts this technological scheme to adapt to utilize belt pulley that water pump power is provided.
Further, this safety type twin shaft adjustable speed water pump, arranges sealing material in the through hole that the held driven shaft 12 arranging passes and between the circumferential cylindrical of driven shaft 12 on bottom plate 16.Adopt this technological scheme can avoid the seepage of cooling liquid, the reliability of protection safety speed regulating device work.
Further, this safety type twin shaft adjustable speed water pump, thereby driven shaft 12 by double row bearing and water pump shell 11 pivot joints or driven shaft 12 by double row bearing and bottom plate 16 pivot joints and water pump shell 11 pivot joints.Adopt this technological scheme except bearing radial load, can also bear certain axial load that acts on both direction.Guarantee the reliability of safety speed regulating device work.
Below in conjunction with accompanying drawing, adjustable speed water pump of the present invention is described further.
Accompanying drawing explanation
Fig. 1 is embodiment 1 structural representation;
Fig. 2 is the sectional view at B-B place in Fig. 1;
Fig. 3 is embodiment 1 structural representation;
Fig. 4 is the sectional view at B-B place in Fig. 3;
Fig. 5 is the distribution schematic diagram of permanent magnet of the present invention on driving disc or driven disc.
Embodiment
Embodiment 1, referring to Fig. 1-2
As shown in Figure 1, safety type twin shaft adjustable speed water pump of the present invention comprises driving shaft 4, driving disc 5, spring sheet 6, adhesive dish 7, driven disc 8, coil 9, annular permanent magnet 10, water pump shell 11, driven shaft 12, impeller 13, iron core 14, upper mounted plate 15, bottom plate 16; Driven shaft 12 coincides with the shaft axis of driving shaft 4, and free end and the gear of driving shaft 4 are affixed; Impeller 13 is fixed on driven shaft 12 one end away from driving shaft 4, on bottom plate 16, arrange and can hold through hole that driven shaft 12 passes affixed with water pump shell 11, in the through hole that the held driven shaft 12 arranging on bottom plate 16 passes and between the circumferential cylindrical of driven shaft 12, sealing material is set, upper mounted plate 15 and bottom plate 16 are affixed and form cavity, thereby described driven shaft 12 is by double row bearing and bottom plate 16 pivot joints and water pump shell 11 pivot joints; Thereby described driving shaft 4 is by bearing and upper mounted plate 15 pivot joints and water pump shell 11 pivot joints; Wherein driving disc 5, spring sheet 6, adhesive dish 7, driven disc 8, coil 9, annular permanent magnet 10 and iron core 14 are positioned at upper mounted plate 15 and bottom plate 16 formation cavitys; Annular permanent magnet 10 is monoblock ring magnet; Driving disc 5 is fixed on driving shaft 4 one end near driven shaft 12; Driven disc 8 is fixed on driven shaft 12 one end near driving shaft 4; Between driving disc 5 and driven disc 8, adhesive dish 7 is set; Adhesive dish 7 is fixed on driving disc 5 by spring sheet 6 and is relative with driven disc 8; Iron core 14 is divided into the outer iron core away from the interior iron core of driven disc 8 and close driven disc 8, and annular permanent magnet 10 is set between interior iron core and outer iron core, and coil 9 is set in the circumferential grooves of outer iron core, and outer iron core and bottom plate 16 are affixed.
When coil 9 energising, iron core 14 produces magnetic field, producing magnetic field with annular permanent magnet 10 offsets, when adhesive dish 7 loses electromagnetic force with driven disc 8, adhesive dish 7 can be separated with driven disc 8 under the active force of spring sheet 6, between adhesive dish 7 and driven disc 8, have a tiny adhesive gap, without any connection, water pump quits work.
When coil 9 active power-off power-off, the magnetic field of annular permanent magnet 10 produces magnetic forces by iron core 14 and driven disc 8, makes driven disc 8 and 7 adhesives of adhesive dish, water pump full speed operation.
When coil 9 causes the passive power-off of coil 9 because of fault, effect is to initiatively power-off is similar, and this water pump can normal work as ordinary straight expelling water pump, has embodied Security.
Embodiment 2, referring to Fig. 1,4
The other the same as in Example 1, the monoblock ring magnet in the alternate embodiment 1 that only annular permanent magnet 10 is formed by several magnet monomer homonymy homopolarity annular array; Free end and the belt pulley of driving shaft 4 are affixed.
Embodiment 3, referring to Fig. 3-5
The other the same as in Example 1, the monoblock ring magnet in the alternate embodiment 1 that only annular permanent magnet 10 is formed by several magnet monomer homopolarity annular annular array; One circle electromagnetic induction ring 18 is also set in the outer ring of driving disc 5, on the side in the outer ring of driven disc 8 near driving disc 5, inlays several permanent magnets 17, permanent magnet 17 is relative with electromagnetic induction ring 18 gaps.
When coil 9 energising, iron core 14 produces magnetic field, producing magnetic field with annular permanent magnet 10 offsets, when adhesive dish 7 loses electromagnetic force with driven disc 8, adhesive dish 7 can be separated with driven disc 8 under the active force of spring sheet 6, between adhesive dish 7 and driven disc 8, there is a tiny adhesive gap, without any connection, but driving disc 5 is followed driving shaft 4 always and is rotated, in driving disc 5 outer rings one circle electromagnetic induction ring 18 also rotates thereupon, the magnetic line of force of inlaying several permanent magnets 17 on cutting driven disc 8, cause electromagnetic induction effect, and then generation promotes the moment of torsion of driven disc 8 rotations, can flexiblely drive driven shaft 12 and then drive water pump with the 30%-40% speed operation of driving shaft rotating speed, realized water pump except stop with full speed two states also have the working state of the third transfer.
When coil 9 active power-off, the magnetic field of annular permanent magnet 10 produces magnetic force by iron core 14 and driven disc 8, make driven disc 8 and 7 adhesives of adhesive dish, water pump full speed operation, simultaneously due to driven disc 8 and 7 adhesives of adhesive dish electromagnetic induction ring 18 do not cut the magnetic line of force of permanent magnet 17, do not cause electromagnetic induction effect, can produce power loss and fever phenomenon yet.
When coil 9 causes the passive power-off of coil 9 because of fault, effect is to initiatively power-off is similar, and this water pump can normal work as ordinary straight expelling water pump, has embodied Security.
Embodiment 4, referring to Fig. 3, Fig. 2
The other the same as in Example 3, the annular permanent magnet 10 that only several magnet monomer homopolarity annular annular array in monoblock ring magnet alternate embodiment 3 form; Free end and the belt pulley of driving shaft 4 are affixed.
Embodiment 5, referring to Fig. 3-5
The other the same as in Example 3, only embodiment 3 also arranges a circle electromagnetic induction ring 18 in the outer ring of driving disc 5, on the side in the outer ring of driven disc 8 near driving disc 5, inlays several permanent magnets 17, and permanent magnet 17 is relative with electromagnetic induction ring 18 gaps; And the present embodiment is to inlay several permanent magnets (17) on the side near driven disc (8), outer ring at driving disc (5), one circle electromagnetic induction ring (18) is set in the outer ring of driven disc (8), and permanent magnet (17) is relative with electromagnetic induction ring (18) gap.
Above-described embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skills make technological scheme of the present invention, all should fall in the definite protection domain of the claims in the present invention book.