Eccentric cutting crankshaft and rotor compressor
By setting the inner concave surface and transitional rounded corners on the outer circular surface of the eccentric shaft of the rotor compressor, the contact area between the crankshaft and the piston is reduced, and hollow holes are added in the eccentric shaft, the problems of high friction loss and power consumption in the prior art are solved. , improves the performance and life of the compressor.
Patent Information
- Application Number
- CN202421534365.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-07-01
AI Technical Summary
In existing rotor compressors, the contact area between the crankshaft eccentric shaft and the piston is too large, resulting in stress concentration, increased friction loss, weakened oil film lubrication and cooling effects, increased shear force, and increased power consumption, which affects the performance and life of the compressor. .
Design an eccentric cutting crankshaft, the outer circular surface of the eccentric shaft is set with an inner concave surface in the non-load-bearing area, and a transitional rounded corner is provided at the junction of the inner concave surface and the outer circular surface to reduce stress concentration; at the same time, hollow holes are added in the eccentric shaft To reduce weight and reduce axial friction loss.
By reducing the contact area between the eccentric shaft and the piston, reducing friction loss, enhancing the lubrication and cooling effect of the oil film, reducing shear force, reducing power consumption, and improving compressor performance and life.
Smart Images
Figure CN222502390U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rotor compressors, in particular to an eccentrically cut crankshaft and a rotor compressor. Background Art
[0002] When the rotary compressor is running, the eccentric shaft of the crankshaft drives the piston to rotate in the cylinder. The existing rotary compressors have the following technical problems: the radial contact area of the non-load-bearing zone between the eccentric shaft of the crankshaft and the piston is too large, and there is no excessive rounding, which leads to stress concentration, increases radial friction loss, reduces the oil film lubrication between the eccentric shaft of the crankshaft and the piston, and reduces the lubrication and cooling effect of the eccentric shaft of the crankshaft and the piston, thereby increasing the shear force, increasing power consumption, and affecting the performance and life of the compressor. Summary of the invention
[0003] The purpose of the utility model is to solve the problems existing in the above-mentioned prior art and to provide an eccentrically cut crankshaft and rotor compressor.
[0004] The specific scheme of the utility model is: an eccentric cutting crankshaft, including a main shaft, an eccentric shaft is arranged on the main shaft, the outer cylindrical surface of the eccentric shaft is located in the non-bearing area and an inner concave surface is arranged, the inner concave surface axially penetrates the upper and lower ends of the eccentric shaft, and a transition fillet is arranged at the junction of the inner concave surface and the outer cylindrical surface, and the width of the inner concave surface accounts for 1 / 6-1 / 5 of the length of the outer cylindrical surface.
[0005] Furthermore, the eccentric shaft is provided with oil holes arranged in the radial direction, and the outer ends of the oil holes are arranged on the inner concave surface.
[0006] Furthermore, a hollow hole is provided inside the eccentric shaft, and the hollow hole is used to reduce the weight of the eccentric shaft.
[0007] Furthermore, the hollow hole is arranged close to the bearing area of the eccentric shaft.
[0008] Furthermore, there are a plurality of hollow holes, and the axes of the hollow holes are arranged along the axial direction.
[0009] Furthermore, the inner concave surface is a plane or a curved surface.
[0010] The utility model also provides a rotor compressor equipped with the eccentrically cut crankshaft.
[0011] Compared with the prior art, the utility model has the following advantages: 1. By arranging an inner concave surface on the outer cylindrical surface of the eccentric shaft, the contact area between the eccentric shaft and the piston is reduced, the radial friction loss of the crankshaft is reduced, and the journal surface is protected, thereby increasing the oil film lubrication of the non-load-bearing area of the eccentric shaft, increasing the cooling effect, reducing the shear force, and reducing stress concentration by arranging a transition radius; 2. By adding a hollow hole in the eccentric shaft to reduce the weight of the eccentric shaft, the axial friction loss is reduced, thereby reducing power consumption and improving the performance and life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a three-dimensional view of the crankshaft of the utility model;
[0013] Figure 2 It is the front view of the crankshaft of the utility model;
[0014] Figure 3 yes Figure 2 AA view;
[0015] Figure 4 It is a schematic diagram of the assembly of the crankshaft, piston and cylinder of the utility model;
[0016] Figure 5 It is a schematic diagram of the prior art crankshaft, piston and cylinder assembly;
[0017] In the figure: 1, cylinder; 2, piston; 3, crankshaft; 31, main shaft; 32, eccentric shaft; 33, inner concave surface; 34, oil hole; 35, transition fillet; 36, hollow hole. DETAILED DESCRIPTION
[0018] See also Figure 1-5 The present embodiment is an eccentrically cut crankshaft 3, comprising a main shaft 31, on which an eccentric shaft 32 is disposed, wherein the outer cylindrical surface of the eccentric shaft 32 is provided with an inner concave surface 33 in a non-load-bearing area, the inner concave surface 33 axially penetrates the upper and lower ends of the eccentric shaft 32, and a transition fillet 35 is provided at the junction of the inner concave surface 33 and the outer cylindrical surface, and the width of the inner concave surface 33 accounts for 1 / 6-1 / 5 of the length of the outer cylindrical surface.
[0019] Furthermore, the eccentric shaft 32 is provided with oil holes 34 arranged in the radial direction, and the outer ends of the oil holes 34 are arranged on the inner concave surface 33 .
[0020] Furthermore, a hollow hole 36 is provided inside the eccentric shaft 32 , and the hollow hole 36 is used to reduce the weight of the eccentric shaft 32 .
[0021] Furthermore, the hollow hole 36 is disposed close to the bearing area of the eccentric shaft 32 .
[0022] Furthermore, there are a plurality of hollow holes 36 , and the axes of the hollow holes 36 are arranged along the axial direction.
[0023] Furthermore, the inner concave surface 33 is a plane or a curved surface.
[0024] The utility model also provides a rotor compressor equipped with the eccentrically cut crankshaft 3.
[0025] The working principle of the utility model is as follows: by arranging a wider inner concave surface 33 on the outer cylindrical surface of the eccentric shaft 32, the contact area between the eccentric shaft 32 and the piston 2 is reduced, thereby reducing friction loss, increasing the oil film lubrication of the non-load-bearing area of the eccentric shaft 32, increasing the cooling effect, and reducing the shear force. At the same time, by arranging a transition fillet 35 at the junction of the inner concave surface 33 and the outer cylindrical surface, stress concentration is reduced; and a hollow hole 36 is added in the eccentric shaft 32 to reduce the weight of the eccentric shaft 32, reduce axial friction loss, thereby reducing power consumption and improving compressor performance and life.
Claims
1. An eccentric cutting crankshaft, comprising a main shaft, an eccentric shaft being arranged on the main shaft, characterized in that: The outer cylindrical surface of the eccentric shaft is provided with an inner concave surface in the non-bearing area, the inner concave surface axially penetrates the upper and lower ends of the eccentric shaft, and a transition fillet is provided at the junction of the inner concave surface and the outer cylindrical surface.
2. The eccentrically cut crankshaft according to claim 1, characterized in that: The eccentric shaft is provided with oil holes arranged in radial direction, and the outer ends of the oil holes are arranged on the inner concave surface.
3. The eccentrically cut crankshaft according to claim 1, characterized in that: A hollow hole is arranged inside the eccentric shaft, and the hollow hole is used to reduce the weight of the eccentric shaft.
4. The eccentrically cut crankshaft according to claim 3 is characterized in that: The hollow hole is arranged close to the bearing area of the eccentric shaft.
5. The eccentrically cut crankshaft according to claim 3 is characterized in that: There are multiple hollow holes, and the axes of the hollow holes are arranged along the axial direction.
6. The eccentrically cut crankshaft according to claim 1, characterized in that: The inner concave surface is a plane or a curved surface.
7. A rotary compressor, characterized in that: Equipped with an eccentrically cut crankshaft as described in any one of claims 1 to 6.