CN212528659U - Piston ring processing die of air compressor - Google Patents
Piston ring processing die of air compressor Download PDFInfo
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- CN212528659U CN212528659U CN202021080787.4U CN202021080787U CN212528659U CN 212528659 U CN212528659 U CN 212528659U CN 202021080787 U CN202021080787 U CN 202021080787U CN 212528659 U CN212528659 U CN 212528659U
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- piston ring
- die
- pressure head
- fixed die
- air compressor
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Abstract
The invention provides a piston ring processing die of an air compressor, which comprises a pressure head, a fixed die and a movable die, wherein the pressure head is connected with the fixed die in a matching manner and used for shaping a piston ring, the outer diameter of the fixed die is the same as the inner diameter of the movable die, the fixed die can be sleeved into the movable die, and the movable die is used for extruding the outer edge of the piston ring to form a piston ring inclined plane; the invention has simple operation, simple forming die and good forming angle of the piston ring, and the air compressor using the piston ring formed by the invention has high performance.
Description
Technical Field
The invention relates to the technical field of oil-free swinging piston type air compressors, in particular to a piston ring processing die of an oil-free swinging piston type air compressor.
Background
At present, when a common oil-free swing piston type air compressor on the market operates, an eccentric wheel rotates around a shaft to drive a connecting rod, a piston ring and a pressing plate to swing and reciprocate. The piston ring is used as a friction fit pair of the cylinder and requires wear resistance and reliable sealing for a long time, so the piston ring is designed to be of an inclined-surface lip-shaped structure. The piston ring is made of modified polytetrafluoroethylene materials, has good wear resistance, but has higher hardness and is not easy to form. The traditional forming method is that before the first piece is formed, the pressure head is heated to a certain temperature. In the forming process, the piston ring slices are placed on the fixed die, the hot pressing head is pressed down to compress the piston ring slices, the piston ring is heated simultaneously, the movable die is lifted, and the outer edges of the piston ring slices are extruded to form inclined planes. The forming mode is high in efficiency, but the included angle between the formed inclined plane and the axis of the piston is large, generally about 40 degrees, after the piston ring is assembled on a compressor, the contact area between the inclined plane of the piston ring and a cylinder is large, the friction loss of the compressor is large, and the service life of the piston ring is short, and the efficiency of the compressor is low. In order to reduce the contact area between the inclined surface of the piston ring and the cylinder, the traditional solution is to synchronously reduce the diameter of the pressure plate and the diameter of the pressure head, but a larger annular gap is formed between the piston ring and the pressure plate after the piston ring and the pressure head are molded, so that the volume clearance of the compressor is reduced, the volume efficiency of the compressor is reduced, and the performance of the compressor is low.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide a piston ring processing die with simple structure and high molding quality.
The invention adopts the following technical scheme to realize the purpose:
the utility model provides an air compressor's piston ring mold processing, includes pressure head, cover half and movable mould, the pressure head with the cover half cooperation is connected for finalize the design to the piston ring, the external diameter of cover half with the internal diameter of movable mould is the same, the cover half can embolia in the movable mould, the movable mould is used for extrudeing the piston ring outward flange and forms the piston ring inclined plane.
Furthermore, the fixed die is cylindrical, a through hole matched with the pressure head is formed in the middle of the fixed die, a step is arranged on the upper surface of the fixed die, and the outer diameter of the step is the same as the inner diameter of the piston ring.
Furthermore, the pressure head is provided with a groove at a position corresponding to the step.
Further, the inner diameter of the movable die is equal to the thickness of the piston ring plus the diameter of a pressure plate of the compressor.
The invention also provides a piston ring of the air compressor, which is manufactured by utilizing the piston ring processing die, and the angle formed by the inclined surface of the piston ring and the axis of the piston ring is 15 degrees.
The invention adopts the technical proposal to achieve the following beneficial effects:
the die with a specific size is combined with the piston ring forming method of the hot cup die, so that the piston ring forming angle is small, the dimensional stability of batch production is good, and the performance of a compressor of the piston ring manufactured by using the die is high.
Drawings
FIG. 1 is an exploded view of a piston ring processing mold according to the present invention;
FIG. 2 is an exploded perspective view of the piston rod of the present invention;
FIG. 3 is a schematic front cross-sectional view of a piston rod of the present invention;
FIG. 4 is a front sectional view of a piston ring processing mold according to the present invention;
description of reference numerals: 1. pressure head 2, fixed die 3, moving die 4, connecting rod 5, piston ring inclined plane 6, piston ring 7, pressure plate 8, cylinder 9, annular gap
Detailed Description
As shown in fig. 1, the piston ring processing mold of the air compressor according to the exploded schematic view of the piston ring processing mold of the present invention includes a pressure head 1, a fixed mold 2 and a movable mold 3, wherein the pressure head 1 is connected with the fixed mold 2 in a matching manner for shaping a piston ring 6, the outer diameter of the fixed mold 2 is the same as the inner diameter of the movable mold 3, the fixed mold 2 can be sleeved into the movable mold 3, and the movable mold 3 is used for extruding the outer edge of the piston ring 6 to form a piston ring inclined surface 5.
As shown in fig. 4, in the front cross-sectional view of the piston ring processing mold of the present invention, the fixed mold 2 is cylindrical, a through hole matched with the pressure head 1 is formed in the middle, a step 21 is formed on the upper surface of the fixed mold 2, and the outer diameter of the step 21 is the same as the inner diameter of the piston ring 6.
The pressure head 1 is provided with a groove 11 at a position corresponding to the step 21.
The inner diameter of the movable die 3 is equal to the thickness of the piston ring 6 plus the diameter of the pressure plate of the compressor.
The piston ring can be placed in an oven with the temperature of 160 +/-5 ℃ which is set according to requirements, when the temperature of the piston ring is raised to the set temperature of the oven, the piston ring is taken out of the oven and placed on the fixed die 2, the pressure head 1 is pressed down to press the piston ring 5, the movable die 3 is lifted, the outer edge of the piston ring 6 is extruded to form the piston ring inclined plane 5, the forming angle of the piston ring inclined plane after the piston ring is theoretically formed is 0 degree, but because the bending part of the piston ring is subjected to larger bending stress during forming, a stress release process is generated after the tool is reset, so that the forming angle is changed from 0 degree to 15 degrees
The angle of the piston ring inclined plane 5 of the piston ring 6 formed according to the scheme of the invention is only 15 degrees, and compared with a 40-degree inclined plane made by a traditional shaping scheme, the angle is smaller and is close to vertical. Therefore, the contact area between the inclined surface 5 of the piston ring and the cylinder 8 is small, the friction loss of the compressor is small, the efficiency of the compressor is high, and the performance is good. Meanwhile, when the piston ring 6 formed by the invention is used, the outer diameter of the pressing plate 7 can be closer to the inner diameter of the air cylinder 8 plus the thickness of the piston ring 5 when the product is designed, so that an annular gap 9 formed between the piston ring 6 and the pressing plate 7 is small, the volume clearance of the compressor is improved, the volume efficiency of the compressor is improved, and the performance of the compressor is further improved.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides an air compressor's piston ring mold processing which characterized in that: the piston ring forming device comprises a pressure head (1), a fixed die (2) and a movable die (3), wherein the pressure head (1) is connected with the fixed die (2) in a matched mode and used for forming a piston ring (6), the outer diameter of the fixed die (2) is the same as the inner diameter of the movable die (3), the fixed die (2) can be sleeved in the movable die (3), and the movable die (3) is used for extruding the outer edge of the piston ring (6) to form a piston ring inclined surface (5).
2. The piston ring processing mold according to claim 1, wherein: the fixed die (2) is cylindrical, a through hole matched with the pressure head (1) is formed in the middle of the fixed die, a step (21) is arranged on the upper surface of the fixed die (2), and the outer diameter of the step (21) is the same as the inner diameter of the piston ring (6).
3. The piston ring processing mold according to claim 2, wherein: the pressure head (1) is provided with a groove (11) at a position corresponding to the step (21).
4. The piston ring processing mold according to claim 1, wherein: the inner diameter of the movable die (3) is equal to the thickness of the piston ring (6) plus the diameter of a pressure plate of the compressor.
5. A piston ring of an air compressor, characterized in that: the piston ring is manufactured by using the piston ring processing die of claims 1-4, and the angle formed by the piston ring inclined plane (5) and the piston ring axis is 15 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021080787.4U CN212528659U (en) | 2020-06-12 | 2020-06-12 | Piston ring processing die of air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021080787.4U CN212528659U (en) | 2020-06-12 | 2020-06-12 | Piston ring processing die of air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212528659U true CN212528659U (en) | 2021-02-12 |
Family
ID=74547240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021080787.4U Active CN212528659U (en) | 2020-06-12 | 2020-06-12 | Piston ring processing die of air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212528659U (en) |
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2020
- 2020-06-12 CN CN202021080787.4U patent/CN212528659U/en active Active
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