High-strength ceramic shaft

Abstract

The utility model discloses a high-strength ceramic shaft, which comprises a ceramic inner shaft, a reinforced outer sleeve is fixedly sleeved at the central position outside the ceramic inner shaft, magnetic conductive layers are fixedly sleeved at two ends of the reinforced outer sleeve, and two symmetrically distributed annular grooves are arranged outside the reinforced outer sleeve. A plurality of embedded through grooves are formed in the outer portion of the reinforced outer sleeve and distributed at equal intervals, the two sides of each embedded through groove are communicated with the interiors of the corresponding annular grooves respectively, and fixing rings are fixedly connected into the two annular grooves. According to the high-strength ceramic shaft, the overall compression resistance and abrasion resistance of the high-strength ceramic shaft can be improved through the reinforcing outer sleeve arranged outside the ceramic inner shaft, meanwhile, the ceramic inner shaft can be prevented from being damaged and broken through the fixing rings and the protection strips evenly distributed outside the high-strength ceramic shaft, and the overall structural strength is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic shafts, in particular to a high-strength ceramic shaft. Background Art

[0002] The motor converts electrical energy into mechanical energy to produce high-speed rotational motion, and the ceramic shaft is the guarantee for the smooth high-speed operation of the motor rotor. The ceramic shaft is formed by isostatic pressing. The ceramic raw material has the advantages of high toughness, high bending strength and high wear resistance, excellent thermal insulation performance, and a thermal expansion coefficient close to that of steel. Therefore, ceramic shafts are gradually replacing traditional metal shafts.

[0003] The publication number CN 219717966 U discloses a ceramic shaft, including a ceramic shaft body, which is a hollow circular tube structure, and at least one matching groove is opened on the outer peripheral surface of the ceramic shaft body, and the bottom of the matching groove is an arc surface, which is concentric with the outer peripheral surface of the ceramic shaft body, and the side walls on both sides of the matching groove bottom extension direction are groove walls, and the planes where the groove walls on both sides are located are not parallel to the axis of the ceramic shaft body. In fact, the practical new structure is reasonably designed, the groove bottom of the matching groove adopts an arc surface design, and the arc surface of the groove bottom has the same curvature as the outer peripheral surface of the ceramic shaft and is concentrically designed. The whole is formed by powder compaction and sintering, and the processing process is convenient and fast, with a high yield rate, which effectively reduces the production and use costs; at the same time, the groove wall of the matching groove is non-parallel to the axis of the ceramic shaft. When the rotor rotates forward or reverse, the groove wall can cooperate with the rotor component to limit well, and no slippage will occur, which ensures the reliability of the use of the ceramic shaft.

[0004] However, the ceramic shaft structure has the following shortcomings: during long-term use, the ceramic shaft will often suffer from brittle fracture due to various external factors or its own quality problems, which will cause the ceramic shaft to malfunction and the supporting equipment to fail to work properly.

[0005] Therefore, the utility model provides a high-strength ceramic shaft to solve the above problems. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a high-strength ceramic shaft to solve the above problems.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a high-strength ceramic shaft, comprising a ceramic inner shaft, a reinforcing outer sleeve fixedly sleeved at the outer center position of the ceramic inner shaft, magnetic conductive layers fixedly sleeved at both ends of the reinforcing outer sleeve, two symmetrically distributed annular grooves are provided on the outside of the reinforcing outer sleeve, a plurality of embedded through grooves are provided on the outside of the reinforcing outer sleeve, the plurality of embedded through grooves are equidistantly distributed, the two sides of the plurality of embedded through grooves are respectively connected to the inside of the corresponding annular grooves, a fixing ring is fixedly connected to each of the two annular grooves, a plurality of protective strips are fixedly connected between the two fixing rings, the protective strips are located in the corresponding embedded through grooves, and the size of the protective strips is adapted to the size of the embedded through grooves.

[0008] Preferably, both ends of the reinforcing sleeve are fixedly connected with reinforcing rings, and the inner wall of the reinforcing ring is fixedly connected to the outer wall of the ceramic inner shaft. The provided reinforcing ring can improve the connection strength between the reinforcing sleeve and the ceramic inner shaft.

[0009] Preferably, the bottom end of the ceramic inner shaft is fixedly connected to a limiting end head, and the limiting end head is in a truncated cone shape. The setting of the limiting end head can facilitate the positioning of the ceramic inner shaft to prevent it from shifting.

[0010] Preferably, the outer wall fixing sleeve of the ceramic inner shaft is provided with a flat connecting sleeve, and the outer wall of the flat connecting sleeve is provided with a slot, so that the flat connecting sleeve and the slot provided at the bottom end of the ceramic inner shaft can be conveniently connected with related parts of the supporting device.

[0011] Preferably, the top end of the ceramic inner shaft is fixedly connected with a thickened sleeve, and the outer wall of the thickened sleeve is provided with a plurality of adaptation grooves, and the plurality of adaptation grooves are equidistantly distributed. The thickened sleeve and the adaptation grooves at the top end of the ceramic inner shaft can be conveniently connected with related parts, and the overall installation is more convenient. In addition, the connection points are all thickened, and the overall structural strength is higher.

[0012] Preferably, the ceramic inner shaft, reinforcing outer sleeve and reinforcing ring are an integrated sintered structure, the ceramic inner shaft is made of zirconium oxide, and the reinforcing outer sleeve is made of silicon carbide ceramic. The reinforcing outer sleeve made of silicon carbide ceramic has high hardness, high compressive strength, strong high-temperature stability and good lubrication effect, and can improve the strength of its overall structure.

[0013] Preferably, the magnetic conductive layer is made of sintered oxide material, and the magnetic conductive layer made of sintered oxide material has good magnetic properties.

[0014] Preferably, the fixing ring is made of stainless steel, and the protective strip is made of stainless steel. The fixing ring and the protective strip made of stainless steel can provide enhanced protection effect for the reinforced jacket.

[0015] Beneficial Effects

[0016] The utility model provides a high-strength ceramic shaft. Compared with the prior art, it has the following beneficial effects:

[0017] (1) The high-strength ceramic shaft can improve its overall compressive and wear resistance by means of a reinforcing outer sleeve arranged on the outside of the ceramic inner shaft. At the same time, the fixing rings and protective strips evenly distributed on the outside can prevent the ceramic inner shaft from being damaged or broken, thereby improving the overall structural strength.

[0018] (2) The high-strength ceramic shaft can be conveniently connected to the relevant parts of the supporting device through the flat connecting sleeve and the card slot arranged at the bottom end of the ceramic inner shaft, and can be conveniently connected to the relevant parts through the thickened sleeve and the adapter groove at the top end of the ceramic inner shaft, so that the overall installation is more convenient, and the connection points are thickened, so the overall structural strength is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the external structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the external structure of the reinforced outer jacket in the utility model;

[0021] Figure 3 It is a structural schematic diagram of the flat connecting sleeve in the utility model;

[0022] Figure 4 It is a relevant assembly drawing of the ceramic inner shaft in the utility model.

[0023] In the figure: 1. Ceramic inner shaft; 2. Reinforced outer sleeve; 3. Magnetic conductive layer; 4. Annular groove; 5. Embedded through groove; 6. Fixed ring; 7. Protective strip; 8. Reinforcement ring; 9. Limiting end; 10. Flat connecting sleeve; 11. Card slot; 12. Thickened sleeve; 13. Adapter slot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1:

[0026] See also Figure 1 and Figure 2A high-strength ceramic shaft comprises a ceramic inner shaft 1, a reinforcing outer sleeve 2 is fixedly sleeved at the outer center position of the ceramic inner shaft 1, magnetic conductive layers 3 are fixedly sleeved at both ends of the reinforcing outer sleeve 2, two symmetrically distributed annular grooves 4 are provided on the outside of the reinforcing outer sleeve 2, a plurality of embedded through grooves 5 are provided on the outside of the reinforcing outer sleeve 2, the plurality of embedded through grooves 5 are equidistantly distributed, the two sides of the plurality of embedded through grooves 5 are respectively connected with the corresponding inner parts of the annular grooves 4, a fixing ring 6 is fixedly connected in each of the two annular grooves 4, a plurality of protective strips 7 are fixedly connected between the two fixing rings 6, the protective strips 7 are located in the corresponding embedded through grooves 5, and the size of the protective strips 7 is adapted to the size of the embedded through grooves 5.

[0027] Embodiment 2:

[0028] See also Figures 1 to 4 This embodiment provides a technical solution based on the first embodiment: both ends of the reinforcing sleeve 2 are fixedly connected with reinforcing rings 8, and the inner wall of the reinforcing ring 8 is fixedly connected to the outer wall of the ceramic inner shaft 1; the bottom end of the ceramic inner shaft 1 is fixedly connected with a limited end head 9, and the limited end head 9 is in the shape of a truncated cone; the outer wall of the ceramic inner shaft 1 is fixedly sleeved with a flat connecting sleeve 10, and the outer wall of the flat connecting sleeve 10 is provided with a card groove 11; the top of the ceramic inner shaft 1 is fixedly connected with a thickening sleeve 12, and the outer wall of the thickening sleeve 12 is provided with a plurality of adapting grooves 13, and the plurality of adapting grooves 13 are equidistantly distributed; the ceramic inner shaft 1, the reinforcing sleeve 2 and the reinforcing ring 8 are an integrated sintered molding structure, the ceramic inner shaft 1 is made of zirconium oxide material, and the reinforcing sleeve 2 is made of silicon carbide ceramic material; the magnetic conductive layer 3 is made of sintered oxide material; the fixing ring 6 is made of stainless steel material, and the protective strip 7 is made of stainless steel material.

[0029] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] In the description of this article, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength ceramic shaft, comprising a ceramic inner shaft (1), characterized in that: A reinforcing outer sleeve (2) is fixedly sleeved at the center position of the outer part of the ceramic inner shaft (1), and magnetic conductive layers (3) are fixedly sleeved at both ends of the reinforcing outer sleeve (2). Two symmetrically distributed annular grooves (4) are provided on the outer part of the reinforcing outer sleeve (2), and a plurality of embedded through grooves (5) are provided on the outer part of the reinforcing outer sleeve (2). The plurality of embedded through grooves (5) are evenly distributed, and the two sides of the plurality of embedded through grooves (5) are respectively connected to the inside of the corresponding annular grooves (4). A fixing ring (6) is fixedly connected to the inside of the two annular grooves (4), and a plurality of protective strips (7) are fixedly connected between the two fixing rings (6). The protective strips (7) are located in the corresponding embedded through grooves (5), and the size of the protective strips (7) is adapted to the size of the embedded through grooves (5).

2. A high-strength ceramic shaft according to claim 1, characterized in that: Both ends of the reinforcing outer sleeve (2) are fixedly connected to reinforcing rings (8), and the inner wall of the reinforcing ring (8) is fixedly connected to the outer wall of the ceramic inner shaft (1).

3. A high-strength ceramic shaft according to claim 2, characterized in that: The bottom end of the ceramic inner shaft (1) is fixedly connected to a limiting end head (9), and the limiting end head (9) is in the shape of a truncated cone.

4. The high-strength ceramic shaft according to claim 1, characterized in that: The outer wall fixing sleeve of the ceramic inner shaft (1) is provided with a flat connecting sleeve (10), and the outer wall of the flat connecting sleeve (10) is provided with a clamping groove (11).

5. The high-strength ceramic shaft according to claim 1, characterized in that: The top end of the ceramic inner shaft (1) is fixedly connected to a thickened sleeve (12), and the outer wall of the thickened sleeve (12) is provided with a plurality of adapting grooves (13), and the plurality of adapting grooves (13) are distributed at equal intervals.

6. The high-strength ceramic shaft according to claim 1, characterized in that: The ceramic inner shaft (1), the reinforcing outer sleeve (2) and the reinforcing ring (8) are an integrated sintered structure; the ceramic inner shaft (1) is made of zirconium oxide, and the reinforcing outer sleeve (2) is made of silicon carbide ceramic.

7. The high-strength ceramic shaft according to claim 1, characterized in that: The magnetic conductive layer (3) is made of sintered oxide material.

8. The high-strength ceramic shaft according to claim 1, characterized in that: The fixing ring (6) is made of stainless steel, and the protection strip (7) is made of stainless steel.

Images