Lubricating oil way structure of crankshaft and piston type refrigeration compressor

Abstract

The lubricating oil way structure comprises the crankshaft, an oil suction hole is formed in the lower portion of the axial center of the crankshaft, one end of the oil suction hole is connected with an oil suction pipe in an interference fit mode, and the other end of the oil suction hole is connected with an oil outlet hole in the crank through a first rotating oil groove in the outer wall of the crankshaft. A circle of second oil groove is formed in the inner wall of the end, close to the crank, of the oil suction hole. A circle of oil groove is cut in the crankshaft, and impurities in oil are small particles and are heavier than oil, so that in the high-speed rotation process of the compressor, the impurities in the oil can be adsorbed into the oil groove more easily due to centrifugal force, and the oil groove is prevented from being damaged. Therefore, the problems of friction among parts of the compressor, oil path blockage and the like caused by impurities in the oil are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor crankshafts, in particular to a lubricating oil circuit structure of a crankshaft and a piston type refrigeration compressor. Background Art

[0002] The common piston refrigeration compressor has a structure as shown in Figure 1. During the operation of the compressor, the crankshaft absorbs oil upward through the oil suction hole at the bottom and discharges it from the oil outlet hole at the top, thereby lubricating the entire compressor system and preventing wear between parts. Because the crankshaft and the oil suction pipe are interference fit, it is easy to produce metal cuttings and impurities in the compressor itself. These impurities are easily sucked up by the crankshaft to block the oil circuit, causing the compressor to jam. Utility Model Content

[0003] In view of the above technical problems in the related art, the utility model provides a crankshaft lubricating oil circuit structure and a piston refrigeration compressor, which can solve the above problems.

[0004] In order to achieve the above technical purpose, the technical solution of the utility model is implemented as follows:

[0005] A crankshaft lubrication oil circuit structure comprises a crankshaft, wherein an oil suction hole is provided at the axial center lower portion of the crankshaft, one end of the oil suction hole is connected to an oil suction pipe by interference fit, and the other end is connected to an oil outlet hole in a crank via a rotating oil groove 1 on the outer wall of the crankshaft, and a circle of oil groove 2 is provided on the inner wall of one end of the oil suction hole close to the crank.

[0006] Furthermore, the second oil tank is located between the oil suction pipe and the delivery port inside the oil suction hole.

[0007] A piston refrigeration compressor uses the above-mentioned crankshaft lubricating oil circuit structure.

[0008] The beneficial effects of the utility model are as follows: the present application cuts a circle of oil grooves inside the crankshaft. Because the impurities in the oil are tiny particles and have heavier properties compared to oil, during the high-speed rotation of the compressor, the impurities in the oil will be more easily adsorbed into the oil groove due to centrifugal force, thereby reducing the friction between the various components of the compressor and the blockage of the oil circuit caused by the impurities in the oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0010] The utility model is further described in detail below with reference to the accompanying drawings.

[0011] Figure 1 It is a structural diagram of the lubricating oil circuit structure in the crankshaft of the existing piston refrigeration compressor mentioned in the background technology of this application;

[0012] Figure 2 It is a simplified structural diagram of a lubricating oil circuit structure of a crankshaft described in an embodiment of the utility model.

[0013] In the figure:

[0014] 1. Crankshaft; 2. Oil suction hole; 3. Rotating oil tank 1; 4. Oil outlet hole; 5. Oil tank 2. DETAILED DESCRIPTION

[0015] 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 belong to the scope of protection of the utility model.

[0016] like Figure 2 As shown, according to the utility model, a lubricating oil circuit structure of a crankshaft is disclosed, including a crankshaft 1, an oil suction hole 2 is opened at the lower axial center of the crankshaft 1, one end of the oil suction hole 2 is connected to an oil suction pipe by interference fit, and the other end is connected to an oil outlet hole 4 in the crank through a rotating oil groove 1 3 on the outer wall of the crankshaft 1, and a circle of oil groove 2 5 is opened on the inner wall of the oil suction hole 2 near one end of the crank, wherein the oil groove 2 5 is located between the oil suction pipe and the delivery port on the inner side of the oil suction hole 2.

[0017] In the present application, only one circle of oil groove 2 5 needs to be cut in the oil suction hole 2, and there is no need to change the overall shape and structure of the crankshaft, which is relatively convenient to implement.

[0018] The present application also discloses a piston refrigeration compressor, which uses the lubricating oil circuit structure of the crankshaft as described above.

[0019] During specific operation, the lubricating oil is sucked into the oil suction hole 2 from the oil suction pipe. During the high-speed rotation of the crankshaft 1, due to the difference in characteristics between the impurities in the oil and the lubricating oil, under the action of centrifugal force, the impurities in the oil are adsorbed into the oil groove 2 5. The lubricating oil with the impurities adsorbed enters the oil outlet hole 4 from the oil suction hole 2 through the rotating oil groove 1 3, and is finally output from the oil outlet hole 4 to the entire compressor system for lubrication.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A crankshaft lubricating oil circuit structure, comprising a crankshaft (1), wherein an oil suction hole (2) is provided at the lower axial center of the crankshaft (1), one end of the oil suction hole (2) is connected to an oil suction pipe by interference fit, and the other end is connected to an oil outlet hole (4) in a crank through a rotating oil groove (3) on the outer wall of the crankshaft (1), characterized in that: A second oil groove (5) is provided on the inner wall of the oil suction hole (2) near one end of the crank.

2. The lubricating oil circuit structure of a crankshaft according to claim 1, characterized in that: The second oil groove (5) is located between the oil suction pipe and the delivery port inside the oil suction hole (2).

3. A piston refrigeration compressor, characterized in that: This compressor uses the crankshaft lubricating oil passage structure according to any one of claims 1 to 2.

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