Crankshaft with double-spiral oil grooves

Abstract

The utility model relates to the technical field of compressor crankshafts, and particularly discloses a double-spiral oil groove crankshaft which comprises a spiral oil groove A and a spiral oil groove B which are spirally arranged on the circumferential surface of a long shaft of the crankshaft, an oil hole C is formed in the surface of the long shaft, and starting points of the spiral oil groove A and the spiral oil groove B are communicated with the oil hole C; the long shaft is provided with an oil hole A and an oil hole B in bilateral symmetry about the center line, the end point of the spiral oil groove A is communicated with the oil hole A, the end point of the spiral oil groove B is communicated with the oil hole B, and the spiral direction of the spiral oil groove A is opposite to the spiral direction of the spiral oil groove B. According to the technical scheme, the two spiral oil grooves are formed in the long shaft of the crankshaft, one spiral oil groove is in the clockwise direction, and the other spiral oil groove is in the anticlockwise direction, so that normal oil pumping can be guaranteed whether the motor rotates forwards or reversely, the oil quantity is sufficient, and abrasion and jamming of a compressor caused by the fact that the motor rotates reversely and cannot pump oil can be completely avoided; and meanwhile, the motor steering detection procedure can be omitted.

Description

Technical Field

[0001] The utility model relates to the technical field of compressor crankshafts, and particularly relates to a crankshaft with a double spiral oil groove. Background Technique

[0002] In reciprocating piston refrigeration compressors, the rotation of the motor drives the crankshaft to rotate synchronously. Under the action of the connecting rod, the crankshaft pushes the piston to reciprocate in the cylinder to form a refrigeration cycle. Generally, there is a section of spiral oil groove on the outer wall of the crankshaft. When the crankshaft rotates, the lubricating oil at the bottom of the compressor housing rises along the oil holes and oil grooves of the crankshaft under the action of centrifugal force to lubricate parts such as the piston and the connecting rod, preventing the compressor from wearing or jamming. There is only one section of spiral oil groove on the outer wall of the long shaft of the existing crankshaft, which corresponds to the rotation direction of the motor. Generally, the motor is designed to rotate clockwise, and the oil groove of the crankshaft spirally rises counterclockwise so as to ensure that the crankshaft can send the lubricating oil to the moving pair parts such as the piston and the connecting rod. In the actual production process, the lead wires of the motor are often connected reversely, causing the motor to rotate reversely. Especially for variable-frequency motors, there are many lead wire joints and reverse connection phenomena often occur. The existing crankshaft can only adapt to one motor rotation direction. When the motor rotates reversely, the crankshaft cannot pump up the oil and cannot lubricate parts such as the cylinder block, piston, and connecting rod, resulting in the compressor being jammed. Therefore, improvement is urgently needed. Therefore, we propose a crankshaft with a double spiral oil groove. Content of the Utility Model

[0003] The purpose of the utility model is to provide a crankshaft with a double spiral oil groove, which solves the problems raised in the background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A crankshaft with a double spiral oil groove, including a spiral oil groove A and a spiral oil groove B spirally arranged on the circumferential surface of the long shaft of the crankshaft. An oil hole C is opened on the surface of the long shaft. The same-side ports of the spiral oil groove A and the spiral oil groove B are both connected and communicated with the oil hole C. The long shaft is symmetrically provided with an oil hole A and an oil hole B about the center line. The spiral oil groove A is connected and communicated with the oil hole A, and the spiral oil groove B is connected and communicated with the oil hole B. The spiral direction of the spiral oil groove A is opposite to the spiral direction of the spiral oil groove B.

[0005] Further, the oil hole A and the oil hole B are at the same horizontal height, and the oil hole A and the oil hole B are horizontally aligned.

[0006] Further, the spiral oil groove A and the spiral oil groove B are symmetrically arranged about the center line of the long shaft.

[0007] Further, the groove bodies of the spiral oil groove A and the spiral oil groove B are arc-shaped grooves.

[0008] Further, the oil hole C is on the perpendicular bisector of the connection line between the oil hole A and the oil hole B.

[0009] Further, the oil hole C is the starting oil hole of the spiral oil groove A and the spiral oil groove B, and the oil holes A and B are the ending oil holes.

[0010] Further, the oil hole C is the ending oil hole of the spiral oil groove A and the spiral oil groove B, and the oil holes A and B are the starting oil holes.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] In the technical solution of this application, there are two sections of spiral oil grooves on the long shaft of the crankshaft, one section is in the clockwise direction and the other section is in the counterclockwise direction, which can ensure normal oil pumping regardless of whether the motor rotates forward or backward, and the oil volume is sufficient. It can completely avoid compressor wear and jamming caused by the inability to pump oil when the motor rotates in reverse, and at the same time, it can eliminate the motor rotation direction detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By reading the following detailed description of the non-restrictive embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present utility model will become more obvious:

[0014] Figure 1 It is the front view of the long shaft of the present utility model;

[0015] Figure 2 It is the rear view of the long shaft of the present utility model;

[0016] Figure 3 It is the cross-sectional view of the crankshaft with a double spiral oil groove of the present utility model;

[0017] Figure 4 It is the schematic structural diagram of the crankshaft with a traditional single spiral oil groove.

[0018] In the figure: 1. Oil hole A; 101. Spiral oil groove A; 2. Oil hole B; 201. Spiral oil groove B; 3. Oil hole C; 4. Long shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0020] Embodiment 1, as Figures 1-4As shown in the figure, the present utility model provides a technical solution: a crankshaft with a double - helix oil groove, including a spiral oil groove A101 and a spiral oil groove B201 spirally arranged on the circumferential surface of the long shaft 4 of the crankshaft. An oil hole C3 is opened on the surface of the long shaft 4. The same - side ports of the spiral oil groove A101 and the spiral oil groove B201 are both connected and communicated with the oil hole C3. The long shaft 4 is symmetrically provided with an oil hole A1 and an oil hole B2 about the center line. The spiral oil groove A101 is connected with the oil hole A1, and the spiral oil groove B201 is connected with the oil hole B2. The spiral direction of the spiral oil groove A101 is opposite to that of the spiral oil groove B201.

[0021] In a specific embodiment of the present utility model, the spiral oil groove A101 is a clockwise spiral oil groove of the long shaft 4, and the spiral oil groove B201 is a counter - clockwise spiral oil groove of the long shaft 4. When the motor rotates clockwise, it drives the long shaft of the crankshaft to rotate clockwise, and the lubricating oil rises along the counter - clockwise spiral oil groove, that is, the lubricating oil flows from the oil hole C3 along the spiral oil groove B201 into the oil hole B2. When the motor rotates counter - clockwise, the lubricating oil rises along the clockwise spiral oil groove, that is, the lubricating oil flows from the oil hole C3 along the spiral oil groove A101 into the oil hole A1. Therefore, no matter whether the motor rotates clockwise or counter - clockwise, the crankshaft can pump oil normally, improving the reliability of the compressor.

[0022] In the preferred technical solution, there are two forms of the crankshaft. One is that the oil hole C is the starting oil hole of the spiral oil groove A and the spiral oil groove B, and the oil holes A and B are the ending oil holes. The other is that the oil hole C is the ending oil hole of the spiral oil groove A and the spiral oil groove B, and the oil holes A and B are the starting oil holes, improving the adaptability of the crankshaft under multiple scenarios.

[0023] In the preferred technical solution, the oil holes A1 and B2 are at the same horizontal height, and the oil hole A1 is horizontally aligned with the oil hole B2. In the preferred technical solution, the oil hole C3 is on the perpendicular bisector of the connection line between the oil hole A1 and the oil hole B2. By reasonably setting the positions of the oil holes, the time for the lubricating oil to flow to the oil hole A1 or the oil hole B2 is similar whether the motor rotates clockwise or counter - clockwise.

[0024] In the preferred technical solution, the spiral oil groove A101 and the spiral oil groove B201 are symmetrically arranged about the center line of the long shaft 4. The groove bodies of the spiral oil groove A101 and the spiral oil groove B201 are arc - shaped grooves, which is beneficial to the flow of the lubricating oil.

[0025] In summary, the crankshaft of this embodiment is designed with a clockwise spiral oil groove and a counter - clockwise spiral oil groove on the long shaft of the crankshaft at the same time. When the motor rotates clockwise, the lubricating oil rises along the counter - clockwise oil groove of the crankshaft. When the motor rotates counter - clockwise, the lubricating oil rises along the clockwise oil groove of the crankshaft. Whether the motor rotates forward or backward, the crankshaft can pump oil normally, improving the reliability of the compressor.

Claims

1. A crankshaft with a double helix oil groove, characterized in that: It includes a spiral oil groove A (101) and a spiral oil groove B (201) spirally arranged on the circumferential surface of the long shaft (4) of the crankshaft. An oil hole C (3) is provided on the surface of the long shaft (4). The same-side ports of the spiral oil groove A (101) and the spiral oil groove B (201) are both connected and communicated with the oil hole C (3). The long shaft (4) is symmetrically provided with an oil hole A (1) and an oil hole B (2) about the center line. The spiral oil groove A (101) is communicated with the oil hole A (1), and the spiral oil groove B (201) is communicated with the oil hole B (2). The spiral direction of the spiral oil groove A (101) is opposite to that of the spiral oil groove B (201).

2. The crankshaft with a double-helix oil groove according to claim 1, characterized in that: The oil hole A (1) and the oil hole B (2) are at the same horizontal height, and the oil hole A (1) is horizontally aligned with the oil hole B (2).

3. The crankshaft with a double - helix oil groove according to claim 1, characterized in that: The spiral oil groove A (101) and the spiral oil groove B (201) are symmetrically arranged about the center line of the long shaft (4).

4. A crankshaft with a double-helix oil groove according to claim 1, characterized in that: The groove bodies of the spiral oil groove A (101) and the spiral oil groove B (201) are arc-shaped grooves.

5. The crankshaft with double-helix oil grooves according to claim 1, characterized in that: The oil hole C (3) is located on the perpendicular bisector of the connection line between the oil hole A (1) and the oil hole B (2).

6. The crankshaft with a double - helix oil groove according to claim 1, characterized in that: The oil hole C (3) is the starting oil hole of the spiral oil groove A (101) and the spiral oil groove B (201), and the oil hole A (1) and the oil hole B (2) are the ending oil holes.

7. A crankshaft with a double - helix oil groove according to claim 1, characterized in that: The oil hole C (3) is the ending oil hole of the spiral oil groove A (101) and the spiral oil groove B (201), and the oil hole A (1) and the oil hole B (2) are the starting oil holes.

Images