阅读说明：本技术 一种不锈钢轴、流体泵及不锈钢轴的加工方法 (Stainless steel shaft, fluid pump and machining method of stainless steel shaft ) 是由 不公告发明人 于 2019-10-28 设计创作，主要内容包括：本发明公开了一种不锈钢轴,用于食品医药生产设备中的流体泵,其特征在于,包括：第一轴头,设置于所述不锈钢轴的第一端,能够连接动力齿轮箱中的齿轮,从而作为所述不锈钢轴的动力输入；以及第二轴头,设置于所述不锈钢轴的第二端,能够连接所述流体泵的泵体并安装转子,从而作为所述不锈钢轴的动力输出；其中,所述第一轴头和所述第二轴头的同轴度不超过φ0.01。上述技术方案使轴的耐酸碱腐蚀能力增强、结构可靠、且性能满足使用要求。(The invention discloses a stainless steel shaft for a fluid pump in food and medicine production equipment, which is characterized by comprising the following components in parts by weight: the first shaft head is arranged at the first end of the stainless steel shaft and can be connected with a gear in a power gear box so as to be used as power input of the stainless steel shaft; the second shaft head is arranged at the second end of the stainless steel shaft, can be connected with a pump body of the fluid pump and is provided with a rotor, so that the power output of the stainless steel shaft is realized; wherein the coaxiality of the first shaft head and the second shaft head is not more than phi 0.01. The technical scheme enhances the acid and alkali corrosion resistance of the shaft, has reliable structure and meets the use requirement of performance.)

1. A stainless steel shaft for use in a fluid pump in a food and medicine production facility, comprising:

the first shaft head is arranged at the first end of the stainless steel shaft and can be connected with a gear in a power gear box so as to be used as power input of the stainless steel shaft; and

the second shaft head is arranged at the second end of the stainless steel shaft, can be connected with a pump body of the fluid pump and is provided with a rotor, so that the power output of the stainless steel shaft is realized;

wherein the coaxiality of the first shaft head and the second shaft head is not more than phi 0.01.

2. The stainless steel shaft of claim 1, further comprising:

and the connecting groove is arranged on the first shaft head and is used for connecting a gear in the power gear box.

3. The stainless steel shaft of claim 2, further comprising:

and the connecting hole group comprises a plurality of connecting holes and is arranged on the end surface of the second shaft head.

4. The stainless steel shaft according to claim 3, wherein the number of the plurality of connecting holes is three, three connecting holes are distributed at three vertices of an equilateral triangle, and a new high-flat strand of the equilateral triangle is in a depth direction of the connecting groove.

5. The stainless steel shaft of claim 1, further comprising:

and the first journal is arranged on the stainless steel shaft and is adjacent to the second shaft head, and the diameters of the first journal and the second shaft head are the same.

6. The stainless steel shaft of claim 5, further comprising:

the shaft collar is arranged on the stainless steel shaft and is positioned on one side, away from the second shaft head, of the first shaft collar;

a first seal groove disposed between the first journal and the second journal head; and

a second seal groove disposed between the first journal and the collar.

7. A fluid pump comprising a stainless steel shaft according to any one of claims 1 to 6.

8. A method for processing a stainless steel shaft is characterized by comprising the following steps:

selecting an acid-alkali corrosion resistant stainless steel bar;

carrying out heat treatment on the bar stock;

carrying out rough turning on the bar stock after the heat treatment;

machining a first shaft head, a second shaft head, a first shaft neck, a shaft collar, a first sealing groove and a second sealing groove by using a precise numerical control lathe;

processing a connecting hole group and a connecting groove by using a numerical control machining center; and

and grinding center holes at two ends of the stainless steel shaft, and taking the center holes as a reference to perform cylindrical grinding on the first shaft head and the second shaft head. So that the coaxiality of the first shaft head and the second shaft head meets the requirement.

Technical Field

The invention relates to the field of parts for food and medicine production equipment, in particular to the field of parts for a fluid pump, and specifically relates to a stainless steel shaft, a fluid pump and a processing method of the stainless steel shaft.

Background

The shaft is a connection transmission part for power input and power output of the fluid pump, wherein one end of the shaft is connected with a gear and a gear box through a bearing to be used as a power input end, the other end of the shaft is connected to a pump body of the fluid pump through a bearing, and a rotor is arranged at the end part of the shaft to realize the fluid output function of the fluid pump.

Because the shaft is connected with two boxes (a fluid pump body and a gear box body) and power needs to be transmitted through rotation, the coaxial precision of the shaft is required to be very high so as to achieve the stability of high-speed rotation; the two boxes (the pump body of the fluid pump and the gear box body) must be completely isolated, and a sealing structure must be arranged on the shaft to ensure that the two boxes are connected without liquid leakage; meanwhile, the shaft needs to be in contact with food and medicine raw materials, and is required to be easy to clean and disinfect and resistant to acid and alkali corrosion.

However, the shaft for the existing fluid pump is limited by a processing method, the coaxial precision is insufficient, and the stability under high-speed rotation is insufficient; limited by structural design, it is difficult to set the sealing structure in a targeted manner; limited by manufacturing materials, difficult to withstand acid and alkali corrosion and difficult to clean and sterilize in the field of food and medicine production equipment.

Disclosure of Invention

At least one object of the present invention is to provide a stainless steel shaft, a fluid pump and a method for processing a stainless steel shaft, so that the shaft is resistant to acid and alkali corrosion, reliable in structure and capable of meeting the use requirements. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a stainless steel shaft for a fluid pump in food and medicine production equipment, which is characterized by comprising the following components:

the first shaft head is arranged at the first end of the stainless steel shaft and can be connected with a gear in a power gear box so as to be used as power input of the stainless steel shaft; and

the second shaft head is arranged at the second end of the stainless steel shaft, can be connected with a pump body of the fluid pump and is provided with a rotor, so that the power output of the stainless steel shaft is realized;

wherein the coaxiality of the first shaft head and the second shaft head is not more than phi 0.01.

As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following paragraphs of the present invention, the stainless steel shaft further includes:

and the connecting groove is arranged on the first shaft head and is used for connecting a gear in the power gear box.

As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following paragraphs of the present invention, the stainless steel shaft further includes:

and the connecting hole group comprises a plurality of connecting holes and is arranged on the end surface of the second shaft head.

As an optimization of any one of the technical solutions or any optimized technical solution provided in the foregoing or in the following, the number of the plurality of connection holes is three, the three connection holes are distributed at three vertices of an equilateral triangle, and a high-flat new strand of the equilateral triangle is in a depth direction of the connection groove.

As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following paragraphs of the present invention, the stainless steel shaft further includes:

and the first journal is arranged on the stainless steel shaft and is adjacent to the second shaft head, and the diameters of the first journal and the second shaft head are the same.

As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following paragraphs of the present invention, the stainless steel shaft further includes:

the shaft collar is arranged on the stainless steel shaft and is positioned on one side, away from the second shaft head, of the first shaft collar;

a first seal groove disposed between the first journal and the second journal head; and

a second seal groove disposed between the first journal and the collar.

The invention provides a fluid pump comprising a stainless steel shaft as described in any of the previous claims.

The invention provides a method for processing a stainless steel shaft, which comprises the following steps:

selecting an acid-alkali corrosion resistant stainless steel bar;

carrying out heat treatment on the bar stock;

carrying out rough turning on the bar stock after the heat treatment;

machining a first shaft head, a second shaft head, a first shaft neck, a shaft collar, a first sealing groove and a second sealing groove by using a precise numerical control lathe;

processing a connecting hole group and a connecting groove by using a numerical control machining center; and

and grinding center holes at two ends of the stainless steel shaft, and taking the center holes as a reference to perform cylindrical grinding on the first shaft head and the second shaft head. So that the coaxiality of the first shaft head and the second shaft head meets the requirement.

Based on the technical scheme, the embodiment of the invention at least can enhance the acid-base corrosion resistance of the shaft, has a reliable structure and meets the use requirement in performance.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a front view of a stainless steel shaft provided by an embodiment of the present invention;

FIG. 2 is a side view of a stainless steel shaft provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional angled structural illustration of a first stub shaft of a stainless steel shaft according to an embodiment of the present invention.

Reference numerals: 1. the first shaft head, 2, the second shaft head, 3, the spread groove, 4, the connecting hole, 5, first journal, 6, the collar, 7, first seal groove, 8, second seal groove.

Detailed Description

The contents of the present invention and the points of distinction between the present invention and the prior art can be understood with reference to the accompanying drawings and the text. The invention will now be described in further detail, including the preferred embodiments, with reference to the accompanying drawings, in which some alternative embodiments of the invention are shown. It should be noted that: any technical features and any technical solutions in the present embodiment are one or more of various optional technical features or optional technical solutions, and for the sake of brevity, this document cannot exhaustively enumerate all the alternative technical features and alternative technical solutions of the present invention, and is also not convenient for each embodiment of the technical features to emphasize it as one of various optional embodiments, so those skilled in the art should know that: any technical means provided by the invention can be replaced or any two or more technical means or technical characteristics provided by the invention can be combined with each other to obtain a new technical scheme. Any technical features and any technical solutions in the present embodiment do not limit the scope of the present invention, and the scope of the present invention should include any alternative technical solutions that can be conceived by those skilled in the art without inventive efforts and new technical solutions that can be obtained by those skilled in the art by combining any two or more technical means or technical features provided by the present invention with each other.

The embodiment of the invention provides a stainless steel shaft for a fluid pump in food and medicine production equipment, which is characterized by comprising the following components:

the first shaft head is arranged at the first end of the stainless steel shaft and can be connected with a gear in a power gear box so as to be used as power input of the stainless steel shaft; and

the second shaft head is arranged at the second end of the stainless steel shaft, can be connected with a pump body of the fluid pump and is provided with a rotor, so that the power output of the stainless steel shaft is realized;

wherein the coaxiality of the first shaft head and the second shaft head is not more than phi 0.01.

Stainless steel is resistant to the corrosion of weak corrosive media such as air, steam, water and the like and chemical corrosive media (such as acid, alkali, salt and the like), has good plasticity, toughness, weldability, corrosion resistance and no magnetism or weak magnetism, has good corrosion resistance in oxidizing and reducing media, and is commonly used for manufacturing acid-resistant equipment, such as corrosion-resistant containers, equipment linings, conveying pipelines, nitric acid-resistant equipment parts and the like. Because of these characteristics, it is also widely used in the fields of food and medicine production equipment which have high requirements for acid and alkali corrosion resistance. Therefore, the corrosion-resistant stainless steel bar is adopted for mechanical processing.

As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following paragraphs of the present invention, the stainless steel shaft further includes:

and the connecting groove is arranged on the first shaft head and is used for connecting a gear in the power gear box.

As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following paragraphs of the present invention, the stainless steel shaft further includes:

and the connecting hole group comprises a plurality of connecting holes and is arranged on the end surface of the second shaft head.

As an optimization of any one of the technical solutions or any optimized technical solution provided in the foregoing or in the following, the number of the plurality of connection holes is three, the three connection holes are distributed at three vertices of an equilateral triangle, and a high-flat new strand of the equilateral triangle is in a depth direction of the connection groove.

As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following paragraphs of the present invention, the stainless steel shaft further includes:

and the first journal is arranged on the stainless steel shaft and is adjacent to the second shaft head, and the diameters of the first journal and the second shaft head are the same.

As an optimization of any one of the technical solutions or any one of the optimized technical solutions provided in the foregoing or the following paragraphs of the present invention, the stainless steel shaft further includes:

the shaft collar is arranged on the stainless steel shaft and is positioned on one side, away from the second shaft head, of the first shaft collar;

a first seal groove disposed between the first journal and the second journal head; and

a second seal groove disposed between the first journal and the collar.

The invention provides a fluid pump comprising a stainless steel shaft as described in any of the previous claims.

The invention provides a method for processing a stainless steel shaft, which comprises the following steps:

selecting an acid-alkali corrosion resistant stainless steel bar; the shaft is processed by using an acid-base corrosion resistant stainless steel bar material, so that the corrosion resistance requirement required by design is met.

Carrying out heat treatment on the bar stock; the shaft carries out heat treatment on the stainless steel bar material, refines and homogenizes crystal grains in the material, is beneficial to subsequent part processing and dimensional stability after finished products, and reduces deformation of the processed parts.

Carrying out rough turning on the bar stock after the heat treatment; the shaft is subjected to rough turning, so that the processing amount of subsequent processing is reduced, and the deformation after finish processing is reduced.

Machining a first shaft head, a second shaft head, a first shaft neck, a shaft collar, a first sealing groove and a second sealing groove by using a precise numerical control lathe; the shaft is machined by adopting a high-precision numerical control lathe and a numerical control machining center, so that the high-precision size requirement of each mounting surface is effectively ensured.

Processing a connecting hole group and a connecting groove by using a numerical control machining center; the shaft adopts a numerical control machining center to machine a connecting hole, a tool bayonet and a key groove, and the high-precision size requirement of the mounting hole is effectively guaranteed. And

and grinding center holes at two ends of the stainless steel shaft, and taking the center holes as a reference to perform cylindrical grinding on the first shaft head and the second shaft head. So that the coaxiality of the first shaft head and the second shaft head meets the requirement. The shaft is ground through the center holes at the two ends and then is subjected to cylindrical grinding, so that the high-precision size requirement and the relative position requirement of each step are met.

Based on the technical scheme, the embodiment of the invention ensures the performance requirement of acid and alkali corrosion resistance of the part by processing the stainless steel bar; the bar blank is subjected to heat treatment, crystal grains in the material are refined and uniform, the subsequent part processing and the dimensional stability after the finished product are facilitated, and the deformation of the processed part is reduced. (ii) a The high-precision numerical control lathe and the numerical control machining center are adopted for machining, the high-precision size requirements and the relative position requirements of each assembling surface, each connecting hole and each key groove are effectively guaranteed, errors during assembling of the whole machine are reduced, the assembling efficiency is improved, and the performance of the whole machine is improved.

The technical scheme provided by the invention is explained in more detail with reference to the accompanying drawings 1-3.

Fig. 1 is a front view showing each assembly outer circular surface of the shaft, which is designed with a plurality of steps and sealing grooves (end No. 2), and is mainly processed by a numerical control lathe and an outer circular grinding, and has higher requirements on the coaxiality, the dimensional accuracy and the dimensional accuracy of the sealing grooves of the assembly outer circular surface. Fig. 2 is a view of the end face of the connecting hole and fig. 3 is a view (section view) of the section of the key groove (No. 3) of fig. 3, which is an external connecting structure of the shaft (No. 1), and is mainly processed by a numerical control processing center.

Selecting an acid-alkali corrosion resistant stainless steel bar, carrying out heat treatment on the bar, and further carrying out rough turning on the heat-treated bar, so that the subsequent processing amount is reduced, and the deformation after finish processing is reduced; and then, a precise numerical control lathe is used for processing each step and the sealing groove, then a numerical control processing center is used for processing the connecting hole, the tool bayonet and the key groove, and finally, the center holes at two ends are ground and then the cylindrical grinding is carried out, so that the high-precision size requirement and the relative position requirement of each step are ensured.

Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.

Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

If the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the description of the invention, the above-described terms are intended to be based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing and simplifying the description, and do not indicate or imply that the referenced device, mechanism, component, or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the invention.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.