CN108167331A - A kind of static pressure cone revolute pair - Google Patents

Abstract

According to the static pressure cone rotating pair involved in the present invention, it includes a containing assembly and a rotating part, the containing assembly includes a containing part having an inner concave conical surface and an outer surface and a plurality of bushings; The outer convex cone surface, the container has a plurality of passages for passing the fluid, the channels are arranged in the inner wall of the container and pass through the inner concave cone surface and the outer surface, and the channel includes a first concave groove arranged on the inner concave cone surface. The cavity and the channel connecting the first cavity and the outer surface, the bushing has a cylindrical bushing cavity, the bushing is arranged at the opening of the first cavity and the opening of the bushing cavity faces the inner concave tapered surface. According to the static pressure cone rotating pair of the present invention, the convex cone does not contact with the concave cone surface when it rotates. Compared with the static pressure cylinder rotating pair, the static pressure cone rotating pair has a better degree of concentric fit, so the gas Or hydrostatic technology can improve the dynamic rotation accuracy of the rotating shaft on the rotating pair, reaching 0.1‑1.0 μm.

Description

A static pressure cone rotating pair

technical field

The invention belongs to the field of machinery, and in particular relates to a static pressure cone rotating pair.

Background technique

Most of the revolving pairs in the prior art are in a contact state when rotating, and the rotating precision and efficiency are not high.

The revolving pair combined with the gas or hydrostatic technology and the cone structure is one of the effective ways to improve the rotation accuracy of the spindle at present.

According to the basic principle of gas (air) or liquid (oil) static pressure technology, let the liquid or gas medium with a certain pressure enter the multiple chambers of the concave cone surface of the rotating pair of the cone, and pass through the external throttle The pressure and flow of the fluid can be adjusted. Because there is a certain gap between the concave and convex cone surfaces, the convex cone floats and is in a non-contact state when rotating. However, the machining accuracy of the concave cone surface and the cavity of the cone rotating pair is high, and the processing cost is high.

Contents of the invention

The present invention is made to solve the above problems, and the purpose is to provide a static pressure cone rotating pair that does not require high machining accuracy of the concave cone surface and the chamber, and can reduce the machining cost.

The present invention provides a static pressure cone rotary joint, which has the characteristics of including a receiving assembly, including a receiving member having an inner concave conical surface and an outer surface and a plurality of bushings; and a rotating member having an inner concave conical surface A matching external convex cone surface, wherein the container has a plurality of passages for passing the fluid, the channels are arranged in the inner wall of the container and pass through the inner concave cone surface and the outer surface, and the channels include the inner concave cone surface facing inward The concave first cavity and the channel connecting the first cavity and the outer surface, the bushing has a cylindrical bushing cavity, the bushing is arranged at the opening of the first cavity and the opening of the bushing cavity faces inward The concave tapered surface, the bottom of the bush cavity communicates with the first cavity.

In the static pressure cone rotary pair provided by the present invention, it may also have such a feature: wherein, a plurality of first concave cavities are arranged on the inner concave cone surface along at least one arrangement plane, and the arrangement plane is perpendicular to the rotation axis of the rotating member plane.

In addition, in the static pressure cone rotary pair provided by the present invention, it may also have such a feature: wherein, the taper of the inner concave tapered surface is 60-150 degrees, and the taper of the outer convex tapered surface is 60-150 degrees. degree, the number of the first cavity is at least three.

In addition, the static pressure cone rotary pair provided by the present invention may also have such a feature: wherein, the shape of the cavity opening of the bushing is any one of a circle, an ellipse, a square, a rectangle and a trapezoid.

In addition, in the static pressure cone rotary pair provided by the present invention, it may also have such a feature: wherein, the concave depth of the bushing cavity is 0.5-5 mm, and the total surface area of the bushing cavity accounts for the total surface area of the concave cone surface 40-60% of that.

In addition, in the static pressure cone rotary pair provided by the present invention, it may also have such a feature: wherein, a plurality of isolation grooves are uniformly arranged on the inner concave cone surface, and the isolation grooves are located in the adjacent two first concave cavities Between them, the extension ends of the isolation grooves meet on the rotation axis of the rotating parts. The width of the isolation grooves is 2-4mm and the depth is 2-5mm. Anti-corrosion coatings are provided on the inner concave cone surface and the outer convex cone surface .

In addition, the static pressure cone rotating pair provided by the present invention may also have such a feature: wherein, the top end surface of the bush is higher than the inner concave cone surface.

In addition, the static pressure cone rotating pair provided by the present invention may also have such a feature: wherein, the top end surface of the bushing is an arc-shaped surface matching the inner concave tapered surface and coincides with the inner concave tapered surface.

In addition, the static pressure cone rotating pair provided by the present invention may also have such a feature: wherein, the bushing and the receiving part are fixedly connected or detachably connected.

In addition, in the static pressure cone rotary pair provided by the present invention, it may also have such a feature: wherein, the convex tapered surface of the rotary member is provided with a concave ring groove corresponding to the bushing cavity along the arrangement plane or protruding annulus.

Function and Effect of Invention

According to the static pressure cone rotating pair involved in the present invention, it includes a containing assembly and a rotating part, the containing assembly includes a containing part having an inner concave conical surface and an outer surface and a plurality of bushings; The outer convex cone surface, the container has a plurality of passages for passing the fluid, the channels are arranged in the inner wall of the container and pass through the inner concave cone surface and the outer surface, and the channel includes a first concave groove arranged on the inner concave cone surface. The concave cavity and the channel connecting the first concave cavity and the outer surface, the bushing has a cylindrical bushing cavity, the bushing is arranged at the opening of the first concave cavity and the opening of the bushing concave cavity faces the inner concave tapered surface, The bottom of the bushing cavity communicates with the first cavity.

According to the hydrostatic cone rotating pair involved in the present invention, the convex cone does not contact with the concave cone surface when it rotates, and is always in a state of gas or liquid friction. There is no direct relationship between the manufacturing error of the body, that is, the runout of the convex cone is not equal to the roundness error of the concave-convex cone. According to the actual measurement, the runout of the convex cone when it rotates is 1/5-1/10 of the roundness error of the concave-convex cone. The static pressure cylindrical rotating pair and the static pressure cone rotating pair have better concentric fit, so the use of gas or liquid static pressure technology can improve the dynamic rotation accuracy of the main shaft on the rotating pair, reaching 0.1-1.0μm.

In addition, the bushing is set on the inner concave tapered surface afterward, the processing of the bushing cavity can be processed separately, and the processing difficulty requirement of the bushing cavity is greatly reduced, thereby improving the working efficiency of the bushing cavity processing and reducing the Processing costs.

Description of drawings

Fig. 1 is a schematic diagram of a hydrostatic cone revolving pair in an embodiment of the present invention;

Fig. 2 is a cross-sectional view of a container in an embodiment of the present invention;

Fig. 3 is B direction view among Fig. 2; And

Fig. 4 is an enlarged view of A in Fig. 1 .

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the following embodiments specifically illustrate the static pressure cone rotation side of the present invention in conjunction with the accompanying drawings.

Embodiment one

As shown in FIG. 1 , the static pressure cone rotating pair 100 includes a containing assembly 10 and a rotating member 20 .

The receiving assembly 10 includes a receiving member 11 and a plurality of bushes 12 .

As shown in FIG. 2 , the receiving member 11 includes a concave tapered surface 111 , an outer surface 112 , a plurality of channels 113 and a through hole 114 .

However, in some occasions where the shaft does not need to pass through, the receiving part 11 may not be provided with the through hole 114 . In this embodiment, the receiving part 11 is provided with a through hole 114 for passing the shaft in the horizontal direction at the center of the inner concave tapered surface 111, and the receiving part 11 is made of metal.

The channel 113 is arranged in the inner wall of the receiving part 11 and penetrates the inner concave tapered surface 111 and the outer surface 112. The channel 113 includes a first concave cavity 113a provided on the inner concave tapered surface 111 and is connected to the first concave cavity 113a and The channel 113b on the outer surface is used to pass fluid through the channel 113 , and the external high-pressure fluid enters the concave cone surface 111 through the channel 113b on the outer surface. In this embodiment, the fluid is liquid oil.

As shown in Figure 4, the bushing 12 has a cylindrical bushing cavity 121, the bushing 12 is arranged at the opening of the first concave cavity 113a and the opening of the bushing cavity 121 faces the inner concave tapered surface 111, the bushing The bottom of the cavity 121 communicates with the first cavity 113a.

As shown in Fig. 2 and Fig. 3, a plurality of first concave cavities 113a are arranged on the inner concave tapered surface 111 along at least one arrangement plane, and the arrangement plane is a plane perpendicular to the rotation axis of the rotating member 20. In the embodiment, the rotating member 20 The axis of rotation is a horizontal line, there are two layout planes, the number of bushes 12 is 16, and the number of bushes on each layout plane is 8. The matching taper between the containing assembly 10 and the rotating member 20 is determined according to the magnitude of the external radial load and axial load. The taper of the concave cone surface is 60-150 degrees, and the taper of the convex cone surface is 60-150 degrees. In this example, the taper of the concave tapered surface 111 and the taper of the convex tapered surface 21 are both 90 degrees.

As shown in Figure 1, the rotating member 20 has an outwardly convex conical surface 21, the outwardly convex conical surface 21 of the rotating member 20 matches the inner concave conical surface 111, there is a certain gap between the concave and convex conical surfaces, and the rotating member 20 circles the horizontal line Rotating inside the concave cone surface 111, when the external high-pressure liquid oil passes through the hole 113b on the outer surface and enters the concave cone surface 111 through the bushing 12, the rotating member 20 floats and is in a non-contact state with the concave cone surface 111 when rotating.

In the embodiment, the rotating member 20 is provided with a through hole matched with the through hole 114 in the horizontal direction for passing the shaft.

Embodiment two

Other structures of this embodiment are the same as those of Embodiment 1, except that the shape of the bushing cavity 121 is any one of circle, ellipse, square, rectangle and trapezoid.

The shape of the opening of the bushing cavity 121 in the second embodiment is oval.

Embodiment Three

The other structure of this embodiment is the same as that of the second embodiment, the difference is that the depth of the bush cavity 121 is 0.5-5mm, and the total surface area of the bush cavity 121 accounts for 40-60% of the total surface area of the concave cone surface.

In the third embodiment, the depth of the inner recess of the bushing cavity 121 is 2mm, and the total surface area of the bushing cavity 121 accounts for 45% of the total surface area of the inner concave tapered surface 111 .

Embodiment four

The other structure of this embodiment is the same as that of the third embodiment, the difference is that the top surface of the bush 12 protrudes from the concave conical surface 111, and the distance between the top surface of the bush 12 and the concave conical surface 11 depends on the bearing capacity, fluid viscosity and bushing The size of the set is determined.

In the fourth embodiment, the distance between the top surface of the bushing 12 and the inner concave tapered surface 11 is 0.5 mm.

Embodiment five

As shown in FIG. 4 , the other structures of this embodiment are the same as those of the third embodiment, the difference is that the top surface of the bushing 12 is an arc-shaped surface matching the inner concave tapered surface and coincides with the inner concave tapered surface.

Embodiment six

Other structures of this embodiment are the same as those of the fifth embodiment, except that the bushing 12 is fixedly connected with the first cavity 113a.

The bushing 12 and the first cavity 113a are fixedly connected by bonding or interference fit. In the sixth embodiment, the bushing 12 and the first cavity 113a are fixedly connected by bonding.

Embodiment seven

The other structures of this embodiment are the same as those of the fifth embodiment, except that the bushing 12 is detachably connected to the first cavity 113a.

In the seventh embodiment, the bushing 12 and the first cavity 113a are fixedly connected by screws.

Embodiment Eight

Other structures of this embodiment are the same as those of Embodiment 7, except that an anti-corrosion coating is provided on the concave tapered surface 111 .

The anti-corrosion coating in the eighth embodiment is nano-ceramics.

Embodiment nine

As shown in Figure 3, the other structure of this embodiment is the same as that of Embodiment 5, the difference is that a plurality of isolation grooves 115 are uniformly arranged on the concave tapered surface 111, and the isolation grooves 115 are located in two adjacent first concave cavities Between 113a, the extension ends of the isolation grooves 115 meet on the rotation axis of the rotating member, and the isolation grooves 14 have a width of 2-4mm and a depth of 2-5mm.

In the ninth embodiment, the isolation grooves 115 have a width of 2.5 mm, a depth of 2 mm, and a quantity of 8.

Embodiment ten

Other structures of this embodiment are the same as those of Embodiment 4, except that two concave ring grooves 211 corresponding to the bushing cavity 121 are provided on the convex tapered surface 21 of the rotating member 20 along the layout plane.

Embodiment Eleven

The other structures of this embodiment are the same as those of the fourth embodiment, except that the convex tapered surface 21 of the rotating member 20 is provided with two convex annular bands corresponding to the bushing cavity 121 along the arrangement plane.

Embodiment 12

Other structures of this embodiment are the same as those of Embodiment 7, except that an anti-corrosion coating is provided on the convex tapered surface 21 .

The anti-corrosion coating in Example 12 is anti-corrosion paint.

Function and effect of embodiment

According to the static pressure cone rotary pair involved in this embodiment, it includes a housing assembly and a rotating part. The outer convex tapered surface of the container has a plurality of passages for passing the fluid. The channels are arranged in the inner wall of the container and pass through the inner concave tapered surface and the outer surface. The concave cavity and the channel connecting the first concave cavity and the outer surface, the bushing has a cylindrical bushing cavity, the bushing is arranged at the opening of the first concave cavity and the opening of the bushing concave cavity faces the inner concave tapered surface, The bottom of the bushing cavity communicates with the first cavity.

According to the hydrostatic cone rotating pair involved in this embodiment, the convex cone does not contact with the concave cone surface when it rotates, and is always in a state of gas or liquid friction. There is no direct relationship between the manufacturing error of the cone, that is, the jumping amount of the convex cone is not equal to the roundness error of the concave-convex cone. According to the actual measurement, the jumping amount of the convex cone when it rotates is 1/5-1/10 of the roundness error of the concave-convex cone, so The use of gas or liquid static pressure technology can improve the dynamic rotation accuracy of the main shaft on the rotating pair, reaching 0.1-1.0 μm.

In addition, the bushing is arranged on the inner concave tapered surface afterward, and the processing difficulty requirement of the bushing cavity is greatly reduced, thereby improving the working efficiency of the bushing cavity processing and reducing the processing cost.

Furthermore, the top end surface of the bushing is higher than the inner concave cone surface, and the processing accuracy of the inner concave cone surface is not required to be high, which has the effect of improving work efficiency and reducing the processing cost of the inner concave cone surface.

Furthermore, the bushing and the containing member are fixedly connected by bonding, which has the characteristics of convenient processing.

Furthermore, the outwardly convex tapered surface of the rotating member is provided with an outwardly convex ring belt corresponding to the bushing cavity along the layout plane, and the processing accuracy requirements for the outwardly convex cone surface are greatly reduced, thereby improving the working efficiency and reducing the processing time. cost.

The above embodiments are preferred examples of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (10)

1. a kind of static pressure cone revolute pair, which is characterized in that including：

Component is accommodated, including the receiving member with the indent conical surface and outer surface and multiple bushings；And

Rotating member has the convex conical surface to match with the indent conical surface, is arranged in the indent conical surface,

Wherein, the receiving member has multiple for by the channel of fluid, the channel to be arranged on the inner wall of the receiving member In and penetrate through the indent conical surface and the outer surface,

The channel includes being arranged on the first cavity for concaving on the indent conical surface and connects first cavity and described The duct of outer surface,

The bushing has cylindrical bushing cavity, and the bushing is arranged on the opening of first cavity and the bushing The opening of cavity is connected towards the indent conical surface, the bottom of the bushing cavity with first cavity.

2. static pressure cone revolute pair according to claim 1, it is characterised in that：

Wherein, multiple first cavitys are arranged on along at least one plane of arrangement on the indent conical surface, the plane of arrangement For the plane perpendicular to the pivot centre line.

3. static pressure cone revolute pair according to claim 2, it is characterised in that：

Wherein, the taper of the indent conical surface is 60-150 degree, and the taper of the convex conical surface is 60-150 degree,

The quantity of first cavity is at least 3.

4. static pressure cone revolute pair according to claim 1, it is characterised in that：

Wherein, the shape of the bushing cavity accent be round, ellipse, square, rectangle and it is trapezoidal in any one.

5. static pressure cone revolute pair according to claim 1, it is characterised in that：

Wherein, the hollow depth of the bushing cavity is 0.5-5mm, and the bushing cavity total surface area accounts for the indent conical surface The 40-60% of total surface area.

6. static pressure cone revolute pair according to claim 2, it is characterised in that：

Wherein, also it is evenly arranged with a plurality of isolation channel on the indent conical surface, the isolation channel is located at adjacent two described the Between one cavity, the elongated end of the isolation channel is intersected on the rotation axis of the rotating member,

The groove width of the isolation channel be 2-4mm, depth 2-5mm,

Corrosion-inhibiting coating is both provided in the indent conical surface and convex conical surface.

7. static pressure cone revolute pair according to claim 1, it is characterised in that：

Wherein, the top end face of the bushing is higher than the indent conical surface.

8. static pressure cone revolute pair according to claim 1, it is characterised in that：

Wherein, the top end face of the bushing is the arcwall face coincideing with the indent conical surface and matches with the indent conical surface.

9. static pressure cone revolute pair according to claim 7 or 8, it is characterised in that：

Wherein, the bushing is to be fixedly connected or be detachably connected with the receiving member.

10. static pressure cone revolute pair according to claim 2, it is characterised in that：

Wherein, plane of arrangement described in the convex conical surface upper edge of the revolving member is provided with corresponding interior with the bushing cavity Recessed annular groove or the annulus of evagination.