CN208417243U - The hydrodynamic bearing of V-shaped groove all standing - Google Patents

Abstract

The utility model discloses a kind of hydrodynamic bearing of V-shaped groove all standing, includes bearing body；Bearing body runs through the inner cavity of Bearing inner with left and right, and several V-arrangement dynamic pressure grooves for being used to fill lubricating fluid are offered in the interior sidewall surface of inner cavity, and dynamic pressure groove full coverage type is covered with the interior sidewall surface of entire inner cavity；Dynamic pressure groove has the first runner and second flow channel for the forming V-shape that crosses each other；The intersection of first runner and second flow channel is located at the middle section position of the interior sidewall surface of inner cavity, and first runner extends to the left end of inner cavity from the oblique left side of intersection, and second flow channel tiltedly extends right up to the right end of inner cavity from intersection；Take this, it is ensured that with dynamic pressure shaft can comprehensive engagement, improve the rotation precision of dynamic pressure shaft, it is more preferable to the protection of dynamic pressure shaft, have better wear-resisting property；Meanwhile the design of V-arrangement dynamic pressure groove effectively prevent lubricating fluid to leak, and improves product service performance and prolongs the service life.

Description

The hydrodynamic bearing of V-shaped groove all standing

Technical field

The utility model relates to hydrodynamic pressure bearing field technologies, refer in particular to a kind of hydrodynamic bearing of V-shaped groove all standing.

Background technique

Currently, hydrodynamic pressure bearing, by being generated in bearing clearance in filling dynamically lubricating fluid in dynamic pressure groove The dynamic pressure of lubricating fluid acts on, to support hydrodynamic shaft in a non contact fashion, is adapted to high speed rotation, and have height The advantages that running accuracy, low noise and high service life.

But the dynamic pressure groove on current hydrodynamic pressure bearing, it can not be unfavorable for moistening with dynamic pressure shaft comprehensive engagement The dynamical balance feature of slip-stream body causes the rotation precision of hydrodynamic shaft to be limited to, in addition, existing hydrodynamic pressure bearing holds Easily there is lubricating fluid leakage phenomenon.

Therefore, it is necessary to study the new technical solution of one kind to solve the above problems.

Utility model content

In view of this, the utility model is in view of the existing deficiencies of the prior art, it is complete that main purpose is to provide a kind of V-shaped groove The hydrodynamic bearing of covering, ensure with dynamic pressure shaft can comprehensive engagement, improve the rotation precision of dynamic pressure shaft, to dynamic pressure turn The protection of axis is more preferable, has better wear-resisting property.

To achieve the above object, the utility model is using following technical solution:

A kind of hydrodynamic bearing of V-shaped groove all standing, includes bearing body；There is the bearing body left and right to run through axis Hold internal inner cavity, wherein the inner cavity is in axis shape cavity structure, offers several be used in the interior sidewall surface of the inner cavity The dynamic pressure groove of lubricating fluid, the V-shaped structure of dynamic pressure groove are filled, the dynamic pressure groove full coverage type is covered with the interior of entire inner cavity Side wall surface；First runner and second flow channel of the dynamic pressure groove with the forming V-shape that crosses each other, first runner and second flow channel Intersection is located at the middle section position of the interior sidewall surface of inner cavity, and first runner extends to the left end of inner cavity from the oblique left side of intersection, the The right end of inner cavity is tiltedly extended right up at the selfing remittance of two runners.

As a preferred embodiment, the right end of the bearing body is extended with axis shape protrusion, and axis shape protrusion diameter is less than axis Hold ontology；Inner cavity penetrates through to the right to the right side of axis shape protrusion.

As a preferred embodiment, all dynamic pressure grooves same circumferencial direction along the inner sidewall of inner cavity is uniformly distributed.

As a preferred embodiment, the first runner and second flow channel symmetrical expression arrangement.

As a preferred embodiment, the angle of the first runner and second flow channel between the two is 35 ° to 45 °.

As a preferred embodiment, the groove width of both the first runner and second flow channel is 0.05 to 0.50 milli The trench depth of both rice, first runner and second flow channel is 0.002 to 0.020 millimeter.

As a preferred embodiment, the left end of the bearing body, which is turned right, is recessed with annular groove.

As a preferred embodiment, the annular groove is designed as section V-arrangement, and the V-arrangement angle of the annular groove is 90°。

As a preferred embodiment, the left end periphery of the hydrodynamic pressure bearing, right end periphery, and, axis shape protrusion Right end periphery, is designed with contra bevel.

As a preferred embodiment, the bearing body is power metallurgical oil-retaining type bearing body, and the powder metallurgy contains The oil content of oil type bearing body is 5% or more.

The utility model has clear advantage and beneficial effect compared with prior art, specifically, by above-mentioned technology Scheme is it is found that it mainly passes through design of full coverage type V-arrangement dynamic pressure groove, it is ensured that can comprehensive engagement, it is dynamic to improve fluid The rotation precision of shaft is pressed, it is more preferable to the protection of dynamic pressure shaft, so that hydrodynamic pressure bearing and hydrodynamic shaft have more preferably Wear-resisting property, extend the service life of hydrodynamic bearing and dynamic pressure shaft；Meanwhile the intersection of first runner and second flow channel Positioned at the middle section position of the interior sidewall surface of inner cavity, higher-pressure region is formed in the angle of V-arrangement dynamic pressure groove, builds and presses effect good, and And anti-leak result is good；And the combination design of power metallurgical oil-retaining type bearing body and full coverage type V-arrangement dynamic pressure groove, make Inner cavity interior sidewall surface on lubricating oil precipitation and again sucking formed recycle well, also have while ensuring oil content Effect prevents lubricating fluid from leaking, and further increases product service performance and prolongs the service life.

For the structure feature and effect for more clearly illustrating the utility model, come with reference to the accompanying drawing with specific embodiment pair The utility model is described in detail.

Detailed description of the invention

Fig. 1 is the main view of the embodiment of the utility model；

Fig. 2 is the left view of the embodiment of the utility model；

Fig. 3 is the right view of the embodiment of the utility model；

Fig. 4 is the cross-sectional view of the embodiment of the utility model；

Fig. 5 is the inner cavity expanded schematic diagram of the embodiment of the utility model；

Fig. 6 is the hydrodynamic bearing operation circulation schematic diagram of the embodiment of the utility model；

Fig. 7 is the partial enlargement diagram of Fig. 6.

Description of drawing identification:

10, bearing body 11, annular groove

20, inner cavity 21, first runner

22, second flow channel 30, axis shape protrusion

40, lubricating fluid 50, hydrodynamic shaft.

Specific embodiment

The utility model is described in further detail below by specific embodiment combination attached drawing.

It please refers to shown in Fig. 1 to Fig. 7, that show the specific structure of the embodiment of the utility model, a kind of V-shaped groove is complete The hydrodynamic bearing of covering is explained by taking oil-containing hydrodynamic pressure bearing as an example herein, certainly, in the utility model, major technique It is the layout feature of dynamic pressure groove in the interior sidewall surface of the inner cavity of hydrodynamic bearing, it is not limited to oil-containing hydrodynamic pressure bearing, Or the bearing etc. that copper rod is process.

The hydrodynamic bearing of the V-shaped groove all standing includes bearing body 10, and the bearing body 10 contains for powder metallurgy Oil type bearing body, it is preferable that the oil content of the power metallurgical oil-retaining type bearing body is 5% or more.Entire fluid dynamic pressure shaft Holding is made using materials such as bronze, brass, fine copper, stainless steels, herein, with no restriction to specific material；The bearing The right end of ontology 10 is integrally extended with axis shape protrusion 30, and 30 diameter of axis shape protrusion is less than bearing body；The bearing body 10 has There is left and right to run through the inner cavity 20 of Bearing inner, inner cavity 20 penetrates through to the right to the right side of axis shape protrusion 30, and inner cavity 20 is for supplying Hydrodynamic shaft 50 is installed.

Wherein, the inner cavity 20 is in axis shape cavity structure, is offered in the interior sidewall surface of the inner cavity 20 several for filling out Fill the dynamic pressure groove of lubricating fluid, the V-shaped structure of dynamic pressure groove, all dynamic pressure grooves same circumference along the inner sidewall of inner cavity 20 The distribution of direction spacing；The dynamic pressure groove full coverage type is covered with the interior sidewall surface of entire inner cavity；Dynamic pressure groove has to cross each other The intersection of the first runner 21 and second flow channel 22 of forming V-shape, first runner 21 and second flow channel 22 is located at the inside of inner cavity 20 The middle section position of wall surface, first runner 21 extend to the left end of inner cavity 20 from the oblique left side of intersection, and second flow channel 22 is from intersection Tiltedly extend right up to the right end of inner cavity 20.

In the present embodiment, the intersection of aforementioned first runner 21 and second flow channel 22, which is located in the interior sidewall surface of inner cavity 20, to be occupied Middle position, first runner 21 and the symmetrical arrangement of second flow channel 22, the angle of first runner 21 and second flow channel 22 between the two are 35 ° to 45 °, all dynamic pressure grooves same circumferencial direction along the inner sidewall of inner cavity 20 is uniformly distributed, and herein, is provided with eight altogether Dynamic pressure groove；The groove width of 22 the two of the first runner 21 and second flow channel is 0.05 to 0.50 millimeter of (preferably 0.10 milli Rice), the trench depth of 22 the two of first runner 21 and second flow channel is 0.002 to 0.020 millimeter.

Preferably, the left end of the bearing body 10, which is turned right, is recessed with annular groove 11, is used for entire fluid dynamic pressure shaft The positioning when installing application is held, herein, the annular groove 11 is designed as section V-arrangement；And aforementioned axis shape protrusion 30 is set It sets, on the one hand, play the role of installing and using for distinguishing entire hydrodynamic pressure bearing both ends, that is, foolproof function When can quickly distinguish both ends, on the other hand, can also be to facilitate positioning when connected applications.

It is right in the present embodiment in view of structural strength, workability and assembly relation with corresponding fluids dynamic pressure shaft The shape and size of the hydrodynamic pressure bearing have carried out ingehious design, are specifically described as follows:

The left and right end entire length of the hydrodynamic pressure bearing is 6.55 to 6.65 millimeters, and the outer diameter of hydrodynamic pressure bearing is 5.99 to 6.02 millimeters, the outer diameter of axis shape protrusion 30 is 4.45 to 4.55 millimeters, and both axis shape protrusion 30 and bearing body 10 are same Central axis setting；The diameter of inner cavity 20 is 1.995 to 2.009 millimeters；4.8 millimeters of the outer diameter of aforementioned toroidal groove 11, it is aforementioned The V-arrangement angle of annular groove 11 is 90 °；Left end periphery, right end periphery in hydrodynamic pressure bearing, and, axis shape protrusion 30 Right end periphery, is designed with contra bevel；The left and right end length of axis shape protrusion 30 is 0.9 to 1.1 millimeter；And in inner cavity 20 left and right end is provided with inclined-plane easy to process.

It is filled with dynamically lubricating fluid 40 in the dynamic pressure groove of the inner cavity 20, is turned using lubricating fluid 40 in hydrodynamic Lubricating action is generated between axis 50 and hydrodynamic pressure bearing, touching between hydrodynamic pressure bearing when hydrodynamic shaft being avoided to rotate Hit and rub, and by lubricating fluid establish pressure and damping characteristic by hydrodynamic shaft maintain certain rotation precision it It is interior.

In the present embodiment, when the operating of dynamic pressure shaft, dynamically lubricating fluid crosses along first runner and second flow channel are past Place's flowing, will form higher-pressure region at the angle center of V-arrangement dynamic pressure groove, generate higher pressure, support the operating of dynamic pressure shaft, It is higher that it can bear load；Meanwhile the first runner and second flow channel of V-arrangement dynamic pressure groove form low-pressure area, to make dynamic pressure shaft It holds with preferable leak preventing effect.

As shown in Figure 4 and Figure 6, it shows generally in the interior sidewall surface of inner cavity the precipitation of lubricating oil and what is sucked again follows Ring schematic diagram；The combination of power metallurgical oil-retaining type bearing body and full coverage type V-arrangement dynamic pressure groove designs, so that the inside of inner cavity On wall surface the precipitation of lubricating oil and again sucking formed recycle well, be conducive to maintain lubricating fluid dynamic equilibrium, it is ensured that Itself oil content of bearing body 10 and the lubricant effect of outer surface substantially mention for the hydrodynamic bearing of traditional technology It has risen service performance and has prolonged the service life.

The design focal point of the utility model is, mainly passes through the design of full coverage type V-arrangement dynamic pressure groove, it is ensured that energy Enough comprehensive engagements, improve the rotation precision of hydrodynamic shaft, more preferable to the protection of dynamic pressure shaft, so that hydrodynamic pressure bearing And hydrodynamic shaft has better wear-resisting property, extends the service life of hydrodynamic bearing and dynamic pressure shaft；Meanwhile first The intersection of runner and second flow channel is located at the middle section position of the interior sidewall surface of inner cavity, is formed in the angle of V-arrangement dynamic pressure groove Higher-pressure region is built and presses effect good, moreover, anti-leak result is good；

And the combination design of power metallurgical oil-retaining type bearing body and full coverage type V-arrangement dynamic pressure groove, so that inner cavity In interior sidewall surface the precipitation of lubricating oil and again sucking formed recycle well, also effectively prevent moistening while ensuring oil content The leakage of slip-stream body, further increases product service performance and prolongs the service life.

The above descriptions are merely preferred embodiments of the present invention, not makees to the technical scope of the utility model Any restrictions, therefore any trickle amendment made by the above technical examples according to the technical essence of the present invention, equivalent change Change and modify, is still within the scope of the technical solutions of the present invention.

Claims (10)

1. a kind of hydrodynamic bearing of V-shaped groove all standing, it is characterised in that: include bearing body, the bearing body has a left side The right side runs through the inner cavity of Bearing inner, wherein the inner cavity is in axis shape cavity structure, is opened up in the interior sidewall surface of the inner cavity There are several dynamic pressure grooves for being used to fill lubricating fluid, the V-shaped structure of dynamic pressure groove, the dynamic pressure groove full coverage type is covered with whole The interior sidewall surface of a inner cavity；The dynamic pressure groove has cross each other first runner and second flow channel of forming V-shape, first runner and The intersection of second flow channel is located at the middle section position of the interior sidewall surface of inner cavity, and first runner extends to inner cavity from the oblique left side of intersection Left end, second flow channel tiltedly extends right up to the right end of inner cavity from intersection.

2. the hydrodynamic bearing of V-shaped groove all standing according to claim 1, it is characterised in that: the right end of the bearing body It is extended with axis shape protrusion, axis shape protrusion diameter is less than bearing body；Inner cavity penetrates through to the right to the right side of axis shape protrusion.

3. the hydrodynamic bearing of V-shaped groove all standing according to claim 1, it is characterised in that: all dynamic pressure grooves are along inner cavity Inner sidewall on same circumferencial direction be uniformly distributed.

4. the hydrodynamic bearing of V-shaped groove all standing according to claim 1, it is characterised in that: the first runner and second Runner symmetrical expression arrangement.

5. the hydrodynamic bearing of V-shaped groove all standing according to claim 4, it is characterised in that: the first runner and second The angle of runner between the two is 35 ° to 45 °.

6. the hydrodynamic bearing of V-shaped groove all standing according to claim 1, it is characterised in that: the first runner and second The groove width of both runners is 0.05 to 0.50 millimeter, the trench depth of both first runner and second flow channel be 0.002 to 0.020 millimeter.

7. the hydrodynamic bearing of V-shaped groove all standing according to claim 1, it is characterised in that: the left end of the bearing body It turns right and is recessed with annular groove.

8. the hydrodynamic bearing of V-shaped groove all standing according to claim 7, it is characterised in that: the annular groove is designed as Section V-arrangement, the V-arrangement angle of the annular groove are 90 °.

9. the hydrodynamic bearing of V-shaped groove all standing according to claim 1, it is characterised in that: the hydrodynamic pressure bearing Left end periphery, right end periphery, and, the right end periphery of axis shape protrusion is designed with contra bevel.

10. the hydrodynamic bearing of V-shaped groove all standing according to claim 1, it is characterised in that: the bearing body is powder Metallurgical oil-containing type bearing body, the oil content of the power metallurgical oil-retaining type bearing body are 5% or more.