Piston pin oil hole structure for piston type refrigeration compressor

Abstract

The utility model relates to the technical field of piston pins, and discloses a piston pin oil hole structure for a piston type refrigeration compressor, which comprises a piston main body, the piston main body comprises a piston head and a piston belt, the piston head is arranged on the piston belt, the surface of the piston head is provided with a ring groove, and the surface of the ring groove is connected with a sealing ring. A pin hole is formed in the surface of the piston skirt belt, the interior of the pin hole is connected with a piston pin body, the outer surface of the piston pin body is coated with a wear-resistant layer, the inner surface of the piston pin body is coated with a reinforcing layer, the interior of the reinforcing layer is coated with a high-temperature-resistant layer, and the piston pin body is made of low-carbon alloy steel. By using the device, the service life of the device is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of piston pins, in particular to a piston pin oil hole structure for a piston type refrigeration compressor. Background Art

[0002] The connecting rod of an existing piston compressor basically consists of a large head and a small head. Inside the compressor, the large head is connected to the crank pin, and the small head is connected to the piston pin. The motor drives the rotating shaft to rotate, and then the connecting rod and piston pin connect the piston to reciprocate in the cylinder, thereby completing the compression and exhaust working process. During this process, both the piston and the piston pin need to be fully lubricated.

[0003] Application number CN202220396635.8 discloses a piston pin oil hole structure for a piston type refrigeration compressor. The utility model discloses a piston pin oil hole structure for a piston type refrigeration compressor, comprising a piston pin, an axial oil hole is provided inside the piston pin, an oil groove is provided in the middle of the outer periphery of the piston pin, the oil groove is connected to the axial oil hole through a radial oil hole, and the inner diameter of the radial oil hole is c, the maximum radial dimension of the oil hole chamfer or fillet of the radial oil hole is b, and the width of the oil groove is a, then c≤a, and b≤a; the piston pin oil hole structure is simple, and by improving the size ratio between the radial oil hole and the oil groove, the fine grinding of the outer circle of the piston pin is facilitated, and the processing accuracy and stability are improved; after adopting the size limit of the application, the outer circle surface area of ​​the outer circle of the piston pin is symmetrically distributed, and the possibility of bullets during the grinding process is greatly reduced; by setting the piston pin oil hole structure, the pressure bearing area of ​​the contact surface between the piston and the connecting rod is increased, and the wear of the piston pin outer circle and the connecting rod hole is reduced.

[0004] The prior art has a piston pin oil hole structure with such a configuration for a piston refrigeration compressor, which has the problems of small pressure-bearing area and large wear between the piston pin and the piston rod. The closest prior art solves the problems of small pressure-bearing area and large wear between the piston pin and the piston rod. However, this piston pin oil hole structure for a piston refrigeration compressor only increases the pressure-bearing area and reduces the wear between the piston pin and the piston rod during use, so the service life of the device cannot be greatly improved. Therefore, we propose a piston pin oil hole structure for a piston refrigeration compressor to solve the above problems. Utility Model Content

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model discloses a piston pin oil hole structure for a piston type refrigeration compressor, comprising a piston body, wherein the piston body comprises a piston head and a piston skirt, wherein the piston head is above the piston skirt, an annular groove is formed on the surface of the piston head, a sealing ring is connected to the surface of the annular groove, a pin hole is formed on the surface of the piston skirt, and the piston pin body is connected inside the pin hole.

[0007] Furthermore, there are two annular grooves and two sealing rings corresponding to the annular grooves.

[0008] Furthermore, a groove is formed on the inner surface of the pin hole and is connected to an oil ring, and there are two oil rings.

[0009] Furthermore, the outer surface of the piston pin body is coated with a wear-resistant layer.

[0010] Furthermore, the inner surface of the piston pin body is coated with a reinforcement layer.

[0011] Furthermore, the interior of the reinforcement layer is coated with a high temperature resistant layer.

[0012] Furthermore, the piston pin body is made of low-carbon alloy steel.

[0013] The utility model has the following beneficial effects:

[0014] (1) The utility model uses this device to first put the sealing ring into the ring groove on the piston head, and then spray the piston pin body. First, the wear-resistant layer is sprayed on the outer surface of the piston pin body, and then the reinforcement layer is sprayed on the inner surface of the piston pin body. After the reinforcement layer is cooled and solidified, the high-temperature resistant layer is sprayed on the inner surface of the reinforcement layer. After the high-temperature resistant layer is cooled and solidified, the piston rod is placed inside the piston body, and then the piston pin body is passed through the pin hole and the hole between the piston rod. By using this device, the service life of the device is greatly improved.

[0015] (2) The present invention can improve the sealing performance of the piston by using a sealing ring.

[0016] (3) The utility model can reduce the weight of the piston pin by using a piston pin made of low-carbon alloy steel, so that the piston can work better.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a side structural diagram of the utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the piston pin body of the utility model;

[0022] Figure 4 This is a schematic diagram of the oil ring structure of the utility model;

[0023] Figure 5 This is a schematic diagram of the wear-resistant layer structure of the utility model;

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] In the figure: 1. Piston body; 2. Piston head; 3. Piston skirt; 4. Ring groove; 5. Sealing ring; 6. Pin hole; 7. Piston pin body; 8. Wear-resistant layer; 9. Reinforcement layer; 10. High-temperature resistant layer; 11. Oil ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1 - Figure 5 As shown, the utility model is a piston pin oil hole structure for a piston refrigeration compressor, comprising a piston body 1, the piston body 1 including a piston head 2 and a piston skirt 3, the piston head 2 being above the piston skirt 3, a ring groove 4 being formed on the surface of the piston head 2, a sealing ring 5 being connected to the surface of the ring groove 4, a pin hole 6 being formed on the surface of the piston skirt 3, a piston pin body 7 being connected to the interior of the pin hole 6, a groove being formed on the inner surface of the pin hole 6, and an oil ring 11 being connected thereto, said oil ring 11 having two. By using this device, the service life of the device is greatly improved.

[0028] The outer surface of the piston pin body 7 is coated with a wear-resistant layer 8. By using the wear-resistant layer 8, the service life of the device is increased.

[0029] The inner surface of the piston pin body 7 is coated with a reinforcement layer 9 . By using the reinforcement layer 9 , the strength of the piston pin body 7 can be increased.

[0030] The interior of the reinforcement layer 9 is coated with a high-temperature resistant layer 10 . By using the high-temperature resistant layer 10 , the service life of the piston pin body 7 is increased.

[0031] The piston pin body 7 is made of low-carbon alloy steel, which reduces the weight of the piston pin body 7 and enables the piston body 1 to work better.

[0032] During use, the sealing ring 5 is first put into the ring groove 4 opened on the piston head 2, and then the piston pin body 7 is sprayed. The wear-resistant layer 8 is first sprayed on the outer surface of the piston pin body 7, and then the reinforcement layer 9 is sprayed on the inner surface of the piston pin body 7. After the reinforcement layer 9 is cooled and solidified, the high-temperature resistant layer 10 is sprayed on the inner surface of the reinforcement layer 9. After the high-temperature resistant layer 10 is cooled and solidified, the piston rod is placed inside the piston body 1, and the piston pin body 7 is passed through the pin hole 6 and the hole between the piston rod. By using the sealing ring 5, the sealing performance of the piston body 1 can be increased. By using the wear-resistant layer 8, the working time of the piston rod and the piston pin body 7 can be extended, and the service life of the device can be increased. By using the reinforcement layer 9, the strength of the piston pin body 7 can be increased. By using the high-temperature resistant layer 10, the damage to the piston pin body 7 caused by the heat generated by the piston body 1 during operation can be reduced, thereby increasing the service life of the piston pin body 7. By using the oil ring 11, a small amount of engine oil can be stored to lubricate the cylinder liner, and excess engine oil can be scraped off.

[0033] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A piston pin oil hole structure for a piston refrigeration compressor, comprising a piston body (1), characterized in that: The piston body (1) includes a piston head (2) and a piston skirt (3), wherein the piston head (2) is above the piston skirt (3), a ring groove (4) is provided on the surface of the piston head (2), a sealing ring (5) is connected to the surface of the ring groove (4), a pin hole (6) is provided on the surface of the piston skirt (3), and a piston pin body (7) is connected inside the pin hole (6).

2. The piston pin oil hole structure for a piston refrigeration compressor according to claim 1, characterized in that: There are two annular grooves (4), and there are two sealing rings (5), which correspond to the annular grooves (4).

3. The piston pin oil hole structure for a piston refrigeration compressor according to claim 1, characterized in that: The inner surface of the pin hole (6) is provided with a groove, and is connected with an oil ring (11), and there are two oil rings (11).

4. The piston pin oil hole structure for a piston refrigeration compressor according to claim 1, characterized in that: The outer surface of the piston pin body (7) is coated with a wear-resistant layer (8).

5. The piston pin oil hole structure for a piston refrigeration compressor according to claim 1, characterized in that: The inner surface of the piston pin body (7) is coated with a reinforcement layer (9).

6. The piston pin oil hole structure for a piston type refrigeration compressor according to claim 5, characterized in that: The interior of the reinforcement layer (9) is coated with a high-temperature resistant layer (10).

7. The piston pin oil hole structure for a piston refrigeration compressor according to claim 1, characterized in that: The piston pin body (7) is made of low-carbon alloy steel.

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