CN220134441U - Internal damping groove type hydrostatic bearing - Google Patents

Abstract

The present disclosure proposes an internal damping groove hydrostatic bearing comprising: a shaft sleeve; the first oil groove is arranged on the inner wall of the shaft sleeve, and the oil inlet end of the first oil groove extends to the outer wall of the shaft sleeve; at least one groove set comprising: the damping groove is arranged on the inner wall of the shaft sleeve, one end of the damping groove is connected with the second oil groove, and one end of the damping groove, which is far away from the second oil groove, is connected with the first oil groove. In the internal damping groove type hydrostatic bearing disclosed by the utility model, due to the damping effect of the damping groove, the pressure of the pressure oil entering the second oil groove rises, so that the offset force on the shaft is effectively counteracted, the direct contact between the shaft and the inner wall of the shaft sleeve is avoided, the abrasion of the hydrostatic bearing is effectively reduced, the rigidity of the hydrostatic bearing is improved, the stability of the hydrostatic bearing is further improved, and the service life of the hydrostatic bearing is prolonged.

Description

An internal damping groove hydrostatic bearing

Technical field

The present disclosure relates to the technical field of hydrostatic bearings, and in particular to an internal damping groove hydrostatic bearing.

Background technique

As an important anti-friction device, the main function of hydrostatic bearings is to carry the weight of mechanical equipment and provide anti-friction effects to ensure the normal operation of mechanical equipment. Currently, hydrostatic bearings are widely used in various mechanical equipment. However, under harsh working conditions such as high speed and heavy load, hydrostatic bearings are prone to severe wear and insufficient stiffness, which affects the overall service life and stability.

Contents of the invention

The present disclosure aims to solve one of the technical problems in the related art, at least to a certain extent.

To this end, the purpose of the present disclosure is to provide an internal damping groove hydrostatic bearing.

In order to achieve the above object, the present disclosure provides an internal damping groove type hydrostatic bearing, including: a shaft sleeve; a first oil groove, the first oil groove is arranged on the inner wall of the shaft sleeve, and the oil inlet of the first oil groove is The end extends to the outer wall of the shaft sleeve; at least one groove group, the groove group includes: a second oil groove and a damping groove, the second oil groove is provided on the inner wall of the shaft sleeve, and the damping groove is provided on On the inner wall of the shaft sleeve, one end of the damping groove is connected to the second oil groove, and one end of the damping groove away from the second oil groove is connected to the first oil groove.

Optionally, the at least one groove group includes: a plurality of first groove groups, the first groove group is located on one side of the first oil groove, and the plurality of first groove groups are located along the axis of the shaft sleeve. Evenly distributed in the circumferential direction; a plurality of second groove groups, the second groove group is located on the side of the first oil groove away from the first groove group, and the plurality of second groove groups are along the axis of the shaft sleeve Evenly distributed around the circumference.

Optionally, a plurality of first tank groups and a plurality of second tank groups are symmetrically distributed on both sides of the first oil tank.

Optionally, the first oil groove is provided on the inner wall of the shaft sleeve along the circumferential direction of the shaft sleeve.

Optionally, the first oil groove is located in the axial middle of the shaft sleeve.

Optionally, the damping groove has a triangular cross-section along the radial direction of the sleeve.

Optionally, the damping groove is provided on the inner wall of the shaft sleeve along the axial direction of the shaft sleeve.

Optionally, the internal damping groove hydrostatic bearing also includes: an oil inlet hole, the oil inlet hole is provided on the shaft sleeve along the radial direction of the shaft sleeve, and the oil inlet hole is connected with the shaft sleeve. The first oil tank is connected.

The technical solution provided by this disclosure can include the following beneficial effects:

When a load is applied to the shaft in the sleeve, an offset force will be generated. The shaft will deflect along the radial direction of the sleeve under the action of the offset force, causing the pressure oil in the first oil groove to enter the second oil groove through the damping groove, but Due to the damping effect of the damping groove, the pressure of the pressure oil entering the second oil groove increases, which effectively offsets the offset force on the shaft and avoids direct contact between the shaft and the inner wall of the shaft sleeve, thereby effectively reducing the static pressure Bearing wear increases the stiffness of the hydrostatic bearing, thereby improving the stability of the hydrostatic bearing and extending the service life of the hydrostatic bearing.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Description of drawings

The above and/or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

Figure 1 is a schematic cross-sectional view of an internal damping groove hydrostatic bearing proposed by an embodiment of the present disclosure;

Figure 2 is a schematic cross-sectional view of an internal damping groove hydrostatic bearing proposed by an embodiment of the present disclosure;

As shown in the figure: 1. Bushing, 2. First oil groove;

3. Tank group, 31. Second oil tank, 32. Damping tank;

4. The first groove group, 5. The second groove group, 6. Oil inlet hole.

Detailed ways

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present disclosure and are not to be construed as limitations of the present disclosure. On the contrary, the disclosed embodiments include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

As shown in Figures 1 and 2, the embodiment of the present disclosure proposes an internal damping groove hydrostatic bearing, which includes a shaft sleeve 1, a first oil groove 2 and at least one groove group 3. The first oil groove 2 is provided on the shaft sleeve 1 On the inner wall, the oil inlet end of the first oil groove 2 extends to the outer wall of the shaft sleeve 1. The groove group 3 includes a second oil groove 31 and a damping groove 32. The second oil groove 31 is provided on the inner wall of the shaft sleeve 1, and the damping groove 32 is provided. On the inner wall of the shaft sleeve 1 , one end of the damping groove 32 is connected to the second oil groove 31 , and one end of the damping groove 32 away from the second oil groove 31 is connected to the first oil groove 2 .

It can be understood that when a load is applied to the shaft in the sleeve 1, an offset force will be generated. The shaft will deflect in the radial direction of the sleeve 1 under the action of the offset force, so that the pressure oil in the first oil groove 2 passes through the damping The groove 32 enters the second oil groove 31, but due to the damping effect of the damping groove 32, the pressure of the pressure oil entering the second oil groove 31 increases, thereby effectively offsetting the offset force on the shaft and preventing the shaft from contacting the inner wall of the shaft sleeve 1 The direct contact between them effectively reduces the wear of the hydrostatic bearing, improves the stiffness of the hydrostatic bearing, thereby improving the stability of the hydrostatic bearing and extending the service life of the hydrostatic bearing.

It should be noted that a hydrostatic bearing is a sliding bearing that uses a pressure pump to force pressure oil into the tiny gap between the sleeve and the shaft.

The inner side of the shaft sleeve 1 is used to set the shaft, and pressure oil is used to lubricate the space between the shaft sleeve 1 and the shaft. The specific type of the shaft sleeve 1 can be set according to actual needs, and there is no limit to this. For example, the shaft sleeve 1 can be a cylinder shape structure.

The first oil groove 2 is used to guide pressure oil so that the pressure oil can be distributed on the inner wall of the shaft sleeve 1. The specific type of the first oil groove 2 can be set according to actual needs and is not limited.

The number of slot groups 3 can be set according to actual needs, and there is no limit to this. For example, the number of slot groups 3 can be one, two, three, four, five, six, etc.

The second oil groove 31 is used to accommodate pressure oil. After the shaft is installed in the shaft sleeve 1, an oil chamber is formed between the second oil groove 31 and the outer wall of the shaft. The specific type of the second oil groove 31 can be set according to actual needs, and no further details are required. Limitation, for example, the slot opening of the second oil groove 31 is rectangular, the groove bottom of the second oil groove 31 is arc-shaped, and the direction of the arc is close to the circumferential direction of the shaft sleeve 1 .

The damping groove 32 is used to form a damping effect on the pressure oil entering the second oil groove 31 from the first oil groove 2. After the shaft is installed in the shaft sleeve 1, a damping channel is formed between the damping groove 32 and the outer wall of the shaft. The specific details of the damping groove 32 The type can be set according to actual needs, and there is no restriction on this.

Among them, the damping effect of the damping groove 32 can be set according to actual needs, and there is no limit to this. For example, the damping groove 32 is set with a smaller cross-sectional size relative to the first oil groove 2 and the second oil groove 31, so as to make the damping groove 32 smaller. When too much pressure oil passes through the damping groove 32, it is difficult to pass quickly, thereby achieving the damping effect.

As shown in Figure 1, in some embodiments, at least one tank group 3 includes a plurality of first tank groups 4 and a plurality of second tank groups 5. The first tank group 4 is located on one side of the first oil tank 2, and multiple The first groove groups 4 are evenly distributed along the circumferential direction of the shaft sleeve 1 , the second groove groups 5 are located on the side of the first oil groove 2 away from the first groove group 4 , and a plurality of second groove groups 5 are located along the circumference of the shaft sleeve 1 distributed evenly.

It can be understood that since the plurality of first groove groups 4 and the plurality of second groove groups 5 are evenly distributed along the circumferential direction of the shaft sleeve 1, and the first groove groups 4 and the second groove group 5 are respectively located in the first oil groove 2 On both sides of the shaft sleeve 1, more damping grooves 32 are evenly distributed on the inner wall of the shaft sleeve 1, so that when a radial offset force in any direction is generated on the shaft in the shaft sleeve 1, there are The offset force corresponds to the damping groove 32, so that under the damping effect of the damping groove 32, the offset force is offset, thereby ensuring the stable setting of the shaft at the central axis of the shaft sleeve 1, thereby effectively reducing The wear of the hydrostatic bearing increases the stiffness of the hydrostatic bearing, thereby improving the stability of the hydrostatic bearing and extending the service life of the hydrostatic bearing.

It should be noted that the number of the first slot group 4 and the second slot group 5 can be set according to actual needs, and there is no limit to this. For example, the first slot group 4 and the second slot group 5 can be set to two respectively. , three, four, five, etc., wherein when the first tank group 4 and the second tank group 5 are four respectively, four second oil tanks 31 and 31 are evenly distributed on one side of the first oil tank 2 Damping groove 32, four second oil grooves 31 and damping grooves 32 are evenly distributed on the other side of the first oil groove 2.

The relative positions of the plurality of first slot groups 4 and the plurality of second slot groups 5 can be set according to actual needs, and there is no limit to this. For example, the plurality of first slot groups 4 and the plurality of second slot groups 5 can be symmetrical. Distributed on both sides of the first oil groove 2; a plurality of first groove groups 4 and a plurality of second groove groups 5 can be staggeredly distributed on both sides of the first oil groove 2 along the circumferential direction of the shaft sleeve 1.

As shown in FIG. 1 , in some embodiments, a plurality of first tank groups 4 and a plurality of second tank groups 5 are symmetrically distributed on both sides of the first oil tank 2 .

It can be understood that since the plurality of first groove groups 4 and the plurality of second groove groups 5 are symmetrically distributed on both sides of the first oil groove 2, when a radial offset force in any direction is generated on the shaft in the sleeve 1 , there are multiple damping grooves 32 corresponding to the offset force on the inner wall of the shaft sleeve 1, so that under the damping effect of the multiple damping grooves 32, the offset force is effectively offset, thereby ensuring that the shaft is The stable setting of the central axis of the shaft sleeve 1 effectively reduces the wear of the hydrostatic bearing, improves the stiffness of the hydrostatic bearing, thereby improving the stability of the hydrostatic bearing and extending the service life of the hydrostatic bearing.

As shown in FIG. 1 , in some embodiments, the first oil groove 2 is provided on the inner wall of the shaft sleeve 1 along the circumferential direction of the shaft sleeve 1 .

It can be understood that since the first oil groove 2 is arranged on the inner wall of the shaft sleeve 1 along the circumferential direction of the shaft sleeve 1, when the pressure oil enters the first oil groove 2 from the oil inlet end of the first oil groove 2, the first oil groove 2 can be The guide of an oil groove 2 is evenly distributed on the inner wall of the shaft sleeve 1 along the circumferential direction of the shaft sleeve 1, thereby ensuring the effective lubrication of the hydrostatic bearing by the pressure oil, thereby reducing the wear of the hydrostatic bearing and improving the stiffness of the hydrostatic bearing.

As shown in Figure 1, in some embodiments, the first oil groove 2 is located in the middle of the shaft sleeve 1 in the axial direction.

It can be understood that since the first oil groove 2 is located in the middle of the shaft sleeve 1 in the axial direction, when the pressure oil enters the first oil groove 2 from the oil inlet end of the first oil groove 2, it can not only use the guidance of the first oil groove 2 It is evenly distributed on the inner wall of the shaft sleeve 1 along the circumferential direction of the shaft sleeve 1. It can also be evenly distributed on the inner wall of the shaft sleeve 1 along the axial direction of the shaft sleeve 1 by using the guide of the first oil groove 2, thereby ensuring that the pressure oil has a positive impact on the hydrostatic bearing. Effective lubrication, thereby reducing the wear of the hydrostatic bearing and improving the stiffness of the hydrostatic bearing.

As shown in FIG. 2 , in some embodiments, the damping groove 32 has a triangular cross-section along the radial direction of the sleeve 1 .

It can be understood that when a load is applied to the shaft in the sleeve 1, an offset force will be generated, and the shaft will deflect in the radial direction of the sleeve 1 under the action of the offset force, so that the pressure oil in the first oil groove 2 passes through the cross section The triangular damping groove 32 enters the second oil groove 31, but due to the damping effect of the damping groove 32, the pressure of the pressure oil entering the second oil groove 31 rises, thereby effectively offsetting the offset force on the shaft and preventing the shaft from colliding with the oil tank. The direct contact between the inner walls of the shaft sleeve 1 effectively reduces the wear of the hydrostatic bearing, improves the stiffness of the hydrostatic bearing, thereby improving the stability of the hydrostatic bearing and extending the service life of the hydrostatic bearing.

It should be noted that the arrangement on the inner wall of the shaft sleeve 1 can be set according to actual needs, and there is no restriction on this. For example, the damping groove 32 with a triangular cross-section has a triangular prism structure, and one side of the damping groove 32 is in contact with the shaft sleeve. 1 The inner wall is flush.

As shown in FIGS. 1 and 2 , in some embodiments, the damping groove 32 is provided on the inner wall of the sleeve 1 along the axial direction of the sleeve 1 .

It can be understood that since the damping groove 32 is arranged on the inner wall of the shaft sleeve 1 along the axial direction of the shaft sleeve 1, the damping groove 32 can cover the inner wall of the shaft sleeve 1 to a larger extent, so that only a relatively small amount of space is provided in the hydrostatic bearing. Fewer damping grooves 32 can play a better damping effect, thereby effectively reducing the processing cost of the hydrostatic bearing and improving the structural strength of the hydrostatic bearing.

As shown in Figure 1, in some embodiments, the internal damping groove hydrostatic bearing also includes an oil inlet hole 6. The oil inlet hole 6 is provided on the shaft sleeve 1 along the radial direction of the shaft sleeve 1, and the oil inlet hole 6 is connected to the shaft sleeve 1. The first oil tank 2 is connected.

It can be understood that through the arrangement of the oil inlet hole 6, the pressure oil can enter the first oil tank 2 through the oil inlet hole 6, which not only facilitates the injection of pressure oil into the first oil tank 2, but also ensures that the pressure oil has a positive impact on the static pressure. Stable lubrication of bearings.

In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. Furthermore, in the description of the present disclosure, "plurality" means two or more unless otherwise specified.

Any process or method descriptions in flowcharts or otherwise described herein may be understood to represent modules, segments, or portions of code that include one or more executable instructions for implementing the specified logical functions or steps of the process. , and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including in a substantially simultaneous manner or in the reverse order, depending on the functionality involved, which shall It should be understood by those skilled in the art to which embodiments of the present disclosure belong.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials, or features are included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and should not be construed as limitations of the present disclosure. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present disclosure. The embodiments are subject to changes, modifications, substitutions and variations.

Claims (8)

1. An internally damped groove hydrostatic bearing, comprising:

a shaft sleeve;

the first oil groove is formed in the inner wall of the shaft sleeve, and the oil inlet end of the first oil groove extends to the outer wall of the shaft sleeve;

at least one groove set, the groove set comprising: the damping device comprises a shaft sleeve, a first oil groove and a damping groove, wherein the first oil groove is arranged on the inner wall of the shaft sleeve, the damping groove is arranged on the inner wall of the shaft sleeve, one end of the damping groove is connected with the first oil groove, and one end of the damping groove, which is far away from the first oil groove, is connected with the first oil groove.

2. The internally damped groove hydrostatic bearing of claim 1, wherein said at least one groove set comprises:

the first groove groups are positioned on one side of the first oil groove, and the first groove groups are uniformly distributed along the circumferential direction of the shaft sleeve;

the second groove groups are positioned on one side, far away from the first groove groups, of the first oil grooves, and the second groove groups are uniformly distributed along the circumference of the shaft sleeve.

3. The internally damped groove hydrostatic bearing of claim 2, wherein a plurality of said first groove sets and a plurality of said second groove sets are symmetrically disposed on either side of said first oil groove.

4. The inner damping groove type hydrostatic bearing of claim 1, wherein said first oil groove is provided on an inner wall of said sleeve in a circumferential direction of said sleeve.

5. The internally damped groove hydrostatic bearing of claim 4, wherein said first oil groove is axially centered on said sleeve.

6. The inner damping groove type hydrostatic bearing according to claim 1, wherein a cross section of the damping groove in a radial direction of the sleeve is triangular.

7. The inner damping groove type hydrostatic bearing according to claim 1, wherein the damping groove is provided on an inner wall of the sleeve in an axial direction of the sleeve.

8. The inner damping groove hydrostatic bearing of claim 1, further comprising:

the oil inlet is arranged on the shaft sleeve along the radial direction of the shaft sleeve, and the oil inlet is connected with the first oil groove.