Spline rotor for a compressor

Abstract

This utility model relates to the field of compressor technology, specifically disclosing a splined rotor for a compressor, including a rotor with an inner hole and a crankshaft that mates with the inner hole of the rotor. The inner hole includes a transition hole and a splined hole coaxially formed. The diameter of the crankshaft is consistent with the inner diameter of the transition hole, and the splined hole and the crankshaft are interference-fitted. In this application, the rotor's inner hole is divided into a transition hole and a splined hole. The transition hole has the same nominal size as the outer diameter of the crankshaft, forming a transition fit. The splined hole and the outer diameter of the crankshaft are interference-fitted. This increases or maintains the breaking torque while reducing cold pressure, reducing crankshaft deformation, scratches, and cutting impurities. The splined hole and the crankshaft use a discontinuous surface contact method. When the rotor is cold-pressed into the crankshaft, the breaking torque of the rotor remains unchanged, thus requiring less cold pressure than a traditional rotor, which reduces crankshaft deformation.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and more specifically, to a splined rotor for a compressor. Background Technology

[0002] The motor rotor used in existing reciprocating compressors (such as...) Figure 3 The rotor (as shown) has the following basic characteristics: 1. The material used for the normal rotor is silicon steel sheets; 2. The connection methods for the silicon steel sheets of the normal rotor include welding, riveting, snap riveting, and loose sheet bonding; 3. The inner hole of the normal rotor is a complete circle; 4. The connection method between the inner hole of the normal rotor and the long shaft of the crankshaft is an interference fit, with an interference amount of 0.01-0.15mm; the rotor core material is singular, basically using only silicon steel sheets. The inner hole of the silicon steel rotor is basically a complete circle. When it is fitted with the crankshaft, the circumferential direction is an interference fit. Furthermore, the crankshaft of a piston compressor is basically made of cast iron. Silicon steel is harder than cast iron. During the fit, the silicon steel rotor is prone to scoring the crankshaft, cutting the crankshaft, resulting in impurities and iron filings on the crankshaft. These iron filings can easily jam moving parts, requiring improvement. Therefore, we propose a spline rotor for compressors. Utility Model Content

[0003] In view of the above-mentioned technical problems in related technologies, this utility model provides a spline rotor for a compressor, which can solve the above problems.

[0004] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows:

[0005] A splined rotor for a compressor includes a rotor with an inner bore and a crankshaft that mates with the inner bore of the rotor. The inner bore includes a transition hole and a splined hole that are coaxially formed. The diameter of the crankshaft is the same as the inner diameter of the transition hole, and the splined hole is interference-fitted with the crankshaft.

[0006] Furthermore, the cross-sectional shape of the spline hole is composed of several continuous circular arcs.

[0007] Furthermore, the radius of the spline hole is smaller than that of the transition hole, and the interference fit of the spline hole relative to the transition hole is set to 0.01~0.35mm.

[0008] Furthermore, the total depth of the transition hole is consistent with the total depth of the spline hole, and the depth of both the transition hole and the spline hole is greater than 4mm.

[0009] Furthermore, the rotor is made of any one of cast iron, cast aluminum, or cast copper.

[0010] The beneficial effects of this utility model are as follows: The rotor inner hole of the device in this application is divided into a transition hole and a spline hole. The transition hole has the same nominal size as the outer circle of the crankshaft and is a transition fit. The spline hole is an interference fit with the outer circle of the crankshaft. While increasing the breaking torque force or maintaining the breaking torque force, it reduces the cold pressure, reduces the crankshaft deformation, reduces scratches and crankshaft cutting impurities.

[0011] The splined shaft and crankshaft use a discontinuous surface contact method. When the rotor is cold-pressed into the crankshaft, the rotor's destructive torque remains unchanged. Therefore, the required cold pressure is less than that of a traditional rotor, which can reduce crankshaft deformation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] The present invention will now be described in further detail with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the structure of a splined rotor for a compressor;

[0015] Figure 2 This is a schematic diagram of the spline hole and the transition hole;

[0016] Figure 3 This is a schematic diagram of the rotor structure of a conventional compressor.

[0017] In the picture:

[0018] 1. Rotor; 2. Spline hole; 3. Transition hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0020] like Figure 1-3 As shown, this utility model discloses a spline rotor for a compressor, including a rotor 1 with an inner hole and a crankshaft that mates with the inner hole of the rotor 1. The inner hole includes a transition hole 3 and a spline hole 2 that are coaxially formed. The diameter of the crankshaft is consistent with the inner diameter of the transition hole 3. The spline hole 2 is interference-fitted with the crankshaft.

[0021] Example 1: The rotor 1 is made of any one of cast iron, cast aluminum, or cast copper, eliminating the need for silicon steel. The crankshaft of the piston compressor is made of cast iron. Silicon steel is harder than cast iron, and during assembly, the silicon steel rotor can easily cause scoring on the crankshaft. This avoids the problem of impurities and metal shavings on the crankshaft, which can easily jam moving parts. The inner bore of rotor 1 is designed so that the transition hole 3 has the same nominal size as the outer diameter of the crankshaft, serving as a guide and ensuring better coaxiality between the crankshaft center and the rotor inner bore center. The spline hole 2 uses a cross-sectional shape composed of several continuous arcs (e.g., ...). Figure 2 As shown), the crankshaft is guided through the transition hole 3 to the spline hole 2. Then, the part of the spline hole 2 that protrudes from the transition hole 3 is press-fitted with the crankshaft. The spline hole and the crankshaft adopt a discontinuous surface contact method, which can increase the breaking torque force or maintain the breaking torque force while reducing the cold pressure, thereby reducing crankshaft deformation, scratches and crankshaft cutting impurities.

[0022] In the preferred technical solution, the cross-sectional shape of the spline hole 2 is composed of several continuous circular arcs, such as... Figure 2 As shown, the number of arc edges of spline hole 2 is set to 40.

[0023] In the preferred technical solution, the radius of the spline hole 2 is smaller than that of the transition hole 3, and the interference of the spline hole 2 compared to the transition hole 3 is set to 0.01~0.35mm. The arc section of the spline hole 2 protrudes from the transition hole 3. Therefore, the protruding part of the spline hole 2 will have an interference fit with the crankshaft to achieve non-circular circumferential contact. Although the interference increases the destructive torque force of the rotor, the cold pressure can remain unchanged or decrease, thereby reducing the amount of crankshaft deformation and the risk of rotor falling off.

[0024] In the preferred technical solution, the total depth of the transition hole 3 is consistent with the total depth of the spline hole 2. The total depth of both the transition hole 3 and the spline hole 2 is greater than 4mm. The transition hole 3 can play a guiding role and at the same time can better make the crankshaft center and the rotor inner hole center coaxial.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spline rotor for a compressor, comprising a rotor (1) having an inner hole, and a crankshaft cooperating with the inner hole of the rotor (1), characterized in that: The inner hole includes a transition hole (3) and a spline hole (2) that are coaxially opened. The diameter of the crankshaft is consistent with the inner diameter of the transition hole (3). The spline hole (2) is interference-fitted with the crankshaft.

2. A splined rotor for a compressor according to claim 1, characterized in that, The cross-sectional shape of the spline hole (2) is composed of several continuous circular arcs.

3. A spline rotor for a compressor as set forth in claim 2 wherein, The radius of the spline hole (2) is smaller than the radius of the transition hole (3), and the interference fit between the spline hole (2) and the crankshaft is set to 0.01-0.35mm.

4. The splined rotor of claim 1 wherein, The total depth of the transition hole (3) is consistent with the total depth of the spline hole (2), and the depth of both the transition hole (3) and the spline hole (2) is greater than 4 mm.

5. A splined rotor for a compressor according to claim 1, characterized in that, The rotor (1) is made of any one of cast iron, cast aluminum, or cast copper.

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