Crescent gear pump and shimming assembly
[technical field]
The utility model relates to a kind of crescent gear pump, especially a kind of crescent gear pump and shimming assembly with two dead axle pressurize calking copper groups.
[background technique]
Crescent gear pump has no entrap phenomenon, carries steady, advantages such as efficient is high, noise is little, long service life.Be widely used in Newtonian liquid or non Newtonian liquid in the industries such as transfer oil, chemical industry, coating, dyestuff, food, grease, medicine; Carry the kind of liquid can be by lightweight, volatile liquid, until big media of viscosity such as heavy, thickness even semisolid liquid, its range of viscosities that is suitable for can reach 0.2-1000000cp.
Existing crescent gear pump with movable swing link with the high and low pressure chamber separately; And radially forming pressure compensation; Form several gapless sealings in making between external tooth tooth top and the swing link, axially moving compensating disc then guarantees the excellent sealing of axial clearance, makes the internal leakage of this pump minimize.Though the crescent gear pump of this structure has excellent sealing effect, internal leakage is still inevitable.
In order to improve said structure; Germany BOSCH the application; Getting into China national stage publication number is CN101828037A; Patent name is the Chinese invention patent application of crescent gear pump, and provide that a kind of two side faces in said filler member are provided with one by rubber-like perisporium radially, and said perisporium is because its crooking ability based on self elastic force is close to small gear or gear ring by the tooth top of its covering.Improve the compact sealing effect between the interior external tooth tooth top through resilient perisporium.Though this structure good sealing effect, the rubber-like perisporium is not wear-resistant, and working life is short, thereby influences whole crescent gear pump working life, and this is that the user is never receptible.Therefore, be necessary existing crescent gear pump is improved.
[model utility content]
The purpose of the utility model is to overcome the deficiency that above-described existing technology exists, and a kind of two-way opening and the crescent gear pump of the pressurize of angle open seals, reliable and stable and long service life that have is provided.
Another purpose of the utility model provides a kind of two-way open and angle is opened the shimming assembly of pressure function that have.
For achieving the above object; The technological scheme of the utility model is: crescent gear pump; Comprise a gear ring that meshes in being used for, small gear, the gear ring of a said interior engagement of installation and the pump housing of small gear that meshes with the part tooth portion of said gear ring; Form an annular space that narrows down gradually between the top circle portion of said gear ring and small gear, be provided with shimming assembly in the said annular space, said shimming assembly is made up of calking positive and the calking bluff bit that matches with said calking positive; One end of said calking bluff bit and said calking positive flexibly connect, and are integrally formed structure.
Said calking positive and the calking bluff bit surface of unifying side that matches is provided with a minimum groove, is used for through pressure calking positive and calking bluff bit being opened each other, to play the pressurize effect of positive confinement.
Said shimming assembly be ", " shape in the Chinese symbol, said calking bluff bit is arranged on the protruding curved portions of said calking positive.
Blunt of said calking body is provided with axis hole, and the calking body is fixed in the said pump housing through the stationary axle that inserts in the axis hole.
The joint that said calking bluff bit is connected with the calking positive is a cylinder axis, and said calking positive is provided with and the circular groove of the corresponding circumference of said cylinder axis greater than semicircle, and said cylinder axis inserts in the said circular groove, and the calking bluff bit can rotate around circular groove and open.
Leave the gap between said circular groove and the cylinder axis so that the calking bluff bit can be on the calking positive vertical opening.
Be provided with the support axis hole in the cylinder axis of said calking bluff bit, described support axis hole is inserted with rotating shaft and is connected with the said pump housing, form outside the stationary axle, and another stationary axle, thus form two dead axle structures.
Shimming assembly is made up of calking positive and the calking bluff bit that matches with said calking positive, and an end of said calking bluff bit and said calking positive flexibly connect, and are integrally formed structure; Said calking positive and the calking bluff bit surface of unifying side that matches is provided with a minimum groove, is used for through pressure calking positive and calking bluff bit being opened each other, to play the pressurize effect of positive confinement.
Said shimming assembly be ", " shape in the Chinese symbol, said calking bluff bit is arranged on the protruding curved portions of said calking positive; Blunt of said calking body is provided with axis hole.
The joint that said calking bluff bit is connected with the calking positive is a cylinder axis, and said calking positive is provided with and the circular groove of the corresponding circumference of said cylinder axis greater than semicircle, and said cylinder axis inserts in the said circular groove, and the calking bluff bit can rotate around circular groove and open.
Leave the gap between said circular groove and the cylinder axis so that the calking bluff bit can be on the calking positive vertical opening.
Be provided with the support axis hole in the cylinder axis of said calking bluff bit, described support axis hole is inserted with rotating shaft and is connected with the said pump housing, form outside the stationary axle, and another stationary axle, thus form two dead axle structures.
Compared with prior art, the utility model has following advantage: reach the pressure requirement that configures through the above-described one group shimming assembly with twin shaft heart, shimming assembly is the design of Construction integration; The absolute function that two-way and angle pressurize are arranged; When returning the pressure that comes by outlet end B, can push calking bluff bit that has two dead axle hearts in the shimming assembly and calking positive open reach best packing state to both sides and angle respectively, when pressure is bigger; Sealing effect can be better; And not only have the two-way function of opening, also can have angle and open effect, all keep-up pressure more in theory and the reality.
[description of drawings]
Below in conjunction with accompanying drawing and embodiment the utility model is further specified:
Fig. 1 is the stereogram of the utility model crescent gear pump;
Fig. 2 is the utility model crescent gear pump cross-sectional structure schematic representation;
Fig. 3 is the utility model crescent gear pump longitudinal sectional view;
Fig. 4 is the utility model shimming assembly cross section view;
Fig. 5 is the utility model shimming assembly open cross section view that makes progress;
Fig. 6 rotates open cross section view for the utility model shimming assembly;
Fig. 7 is the erection drawing of the utility model crescent gear pump.
[embodiment]
Below in conjunction with accompanying drawing and specific embodiment the utility model is carried out detailed explanation.
Referring to Fig. 1-3, crescent gear pump comprises that is used for the pump housing 14 that 13, one 12, one of small gears with the part tooth portion engagement of said gear ring 13 of the interior gear ring that meshes are installed said interior gear ring that meshes 13 and small gear 12.On the said small gear 12 fixed base wheel shafts, through axle bearing in the said pump housing 14.Said small gear 12 is an arranged off-centre with respect to gear ring 13, interdependent relative tooth portion engagement in small gear 12 and the gear ring 13.Form a sickle-shaped annular space that narrows down gradually--pump chamber between the top circle portion of gear ring 13 and small gear 12, in said pump chamber, be provided with adaptive with a side periphery profile phase of said pump chamber basically shimming assembly 9.Referring to Fig. 2, arrow is a sense of rotation, and then said shimming assembly 9 is located at a clockwise side of said annular space.The effect of said shimming assembly 9 is through in the top circle zone, contacting with tooth top formation face being sealed by the teeth groove of its covering, these teeth groove in axial both sides respectively by the end face of the pump housing 14 and the pressure plate and sealing gasket 7 sealings of two respective shapes that are arranged on the pump case.
Referring to Fig. 4; Said shimming assembly 9 is made up of calking positive 91 and the calking bluff bit 92 that matches with said calking positive 91; The integrative-structure that one end of said calking bluff bit 92 and said calking positive 91 flexibly connect forms one and can open or rotate open integral body each other.Said calking positive 91 and calking bluff bit 92 surface of unify side that matches is provided with a minimum groove 93, is used for through pressure calking positive 91 and calking bluff bit 92 being opened each other, to play the pressurize effect of positive confinement.Said shimming assembly 9 be comma () shape in the Chinese symbol, said calking bluff bit 92 is arranged on the protruding curved portions of said calking positive 91.Blunt of calking positive 91 is provided with axis hole 96, is fixed in the said pump housing 14 through the stationary axle 10 that inserts in the axis hole 96.The joint that said calking bluff bit 92 is connected with calking positive 91 is a cylinder axis; Said calking positive 91 is provided with and the circular groove of the corresponding circumference of said cylinder axis greater than semicircle; Said cylinder axis inserts in the said circular groove, and calking bluff bit 92 can rotate around circular groove and open.Leave the gap between said circular groove and the cylinder axis so that calking bluff bit 92 can be on calking positive 91 vertical opening.Be provided with in the cylinder axis of said calking bluff bit 92 and support axis hole 95, described support axis hole 95 is inserted with rotating shaft 11 and is connected with the said pump housing 14, form outside the stationary axle 10, and another stationary axle, thus form two dead axle structures.Shown in Fig. 5 the calking positive 91 of shimming assembly 9 and the state of calking bluff bit 92 vertical opening behind pressurized are shown, can the amount of playing sealing pressurize effect also, the direction of arrow is that calking positive 91 opens direction with calking bluff bit 92.Said Fig. 6 illustrates, and goes out the calking positive 91 and calking bluff bit 92 open at an angle state behind pressurized of shimming assembly 9, can behind vertical opening, can also open at an angle, plays the pressurize effect of double seal, and wherein arrow is open direction.
The utility model is reached the pressure requirement that configures through the above-described one group shimming assembly 9 with twin shaft heart; Shimming assembly 9 is designs of Construction integration, and the absolute function of two-way and angle pressurize is arranged, when being returned the pressure that comes by outlet end B (entrance point is A); Can push calking bluff bit that has two dead axle hearts in the shimming assembly 9 92 and calking positive 91 open reach best packing state to both sides and angle respectively; When pressure was bigger, sealing effect can be better, and not only have the two-way function of opening; Also can have angle and open effect, all keep-up pressure more in theory and the reality.
Referring to Fig. 7, the described crescent gear pump of the utility model also comprises the front pump cover 5 and protecgulum 1 that is installed in the pump housing 14 front ends, is provided with oil sealing 2, axle bush 4 and seal ring 3 between said protecgulum 1 and the front pump cover 5.The sealing gasket that is provided with pressure plate 8 and two respective shapes 7 sealings between the said pump housing 14 and the front pump cover 5.In addition, also be provided with solid pin 6 between the said pump housing 14 and the front pump cover 5.The rear pump cover 15 and the bonnet 16 of the said pump housing 14 rear ends are provided with axle bush 4 and seal ring 3 between said bonnet 16 and the rear pump cover 15.The sealing gasket that is provided with pressure plate 8 and two respective shapes 7 sealings between the said pump housing 14 and the rear pump cover 15.Also be provided with solid pin 6 between the said pump housing 14 and the rear pump cover 15 outward.The said pump housing 14 is fastening through screw with protecgulum 1, front pump cover 5, rear pump cover 15 and bonnet 16.
A kind of shimming assembly 9; Referring to Fig. 4; Said shimming assembly 9 is made up of calking positive 91 and the calking bluff bit 92 that matches with said calking positive 91, and an end of said calking bluff bit 92 and said calking positive 91 flexibly connect, and form one and can open or rotate open integral body each other.Said calking positive 91 and calking bluff bit 92 surface of unify side that matches is provided with a minimum groove 93, is used for through pressure calking positive 91 and calking bluff bit 92 being opened each other, to play the pressurize effect of positive confinement.Said shimming assembly 9 be comma () shape in the Chinese symbol, said calking bluff bit 92 is arranged on the protruding curved portions of said calking positive 91.Blunt of calking positive 91 is provided with axis hole 96, is fixed in the said pump housing 14 through the stationary axle 10 that inserts in the axis hole 96.The joint that said calking bluff bit 92 is connected with calking positive 91 is a cylinder axis; Said calking positive 91 is provided with and the circular groove of the corresponding circumference of said cylinder axis greater than semicircle; Said cylinder axis inserts in the said circular groove, and calking bluff bit 92 can rotate around circular groove and open.Leave the gap between said circular groove and the cylinder axis so that calking bluff bit 92 can be on calking positive 91 vertical opening.Be provided with in the cylinder axis of said calking bluff bit 92 and support axis hole 95, described support axis hole 95 is inserted with rotating shaft 11 and is connected with the said pump housing 14, form outside the stationary axle 10, and another stationary axle, thus form two dead axle structures.Shown in Fig. 5 the calking positive 91 of shimming assembly 9 and the state of calking bluff bit 92 vertical opening behind pressurized are shown, can the amount of playing sealing pressurize effect also, the direction of arrow is that calking positive 91 opens direction with calking bluff bit 92.Said Fig. 6 illustrates, and goes out the calking positive 91 and calking bluff bit 92 open at an angle state behind pressurized of shimming assembly 9, can behind vertical opening, can also open at an angle, plays the pressurize effect of double seal, and wherein arrow is open direction.The action effect of said shimming assembly 9 and principle are as previously discussed.
Although the utility model is to describe with reference to specific embodiment, this description does not also mean that the restriction of the utility model formation.With reference to the description of the utility model, other of the disclosed embodiments change, and all can expect to those skilled in the art, and this variation should belong in the affiliated claim institute restricted portion.