CN217029304U - Oscillating piston, two-stage compressor and vehicle - Google Patents
Oscillating piston, two-stage compressor and vehicle Download PDFInfo
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- CN217029304U CN217029304U CN202220073188.2U CN202220073188U CN217029304U CN 217029304 U CN217029304 U CN 217029304U CN 202220073188 U CN202220073188 U CN 202220073188U CN 217029304 U CN217029304 U CN 217029304U
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Abstract
The utility model relates to the field of compressors, in particular to a swing piston, a two-stage compressor and a vehicle. The swing piston comprises a head end and a tail end; the head end is detachably provided with a valve plate which can be opened and closed and covers the exhaust port; the valve plate is provided with an air guide through hole. According to the swing piston provided by the utility model, the air guide through hole is formed in the valve plate, so that when an air guide gap (equivalent to an air guide gap in the prior art) is formed between the head end (equivalent to a piston body in the prior art) and the deformed valve plate, air positioned in the air guide gap can not only cross the valve plate from the outline edge of the valve plate and is injected into a piston cylinder (equivalent to a compression cylinder in the prior art), but also can penetrate through the air guide through hole in the valve plate and is injected into the piston cylinder.
Description
Technical Field
The utility model relates to the field of compressors, in particular to a swing piston, a two-stage compressor and a vehicle.
Background
In the prior art, there is provided a patent document entitled compressor valve plate air guide having application number 201620046667. X. In the prior art, a valve plate and a valve plate are provided, wherein the valve plate is provided with four air guide holes which are covered by a cross-shaped valve plate; in the process of its application, the four corners of valve block is kept away from the valve plate simultaneously or contacts the valve plate simultaneously.
In the prior art, the air guide hole is covered by the valve plate, and when four corners of the valve plate are far away from the valve plate, an air guide gap is formed between any one corner of the valve plate and the valve plate at one air guide hole, so that air enters the air guide gap from the air guide hole, and the air in the air guide gap is blocked by the valve plate, so that the air guide gap generates direction-changing flow; it follows that the valve plate of the prior art has the effect of blocking the air flow, and the air flow through the air guide gap between the valve plate and the piston body is unavoidable, but the air flow into the compression cylinder is blocked by the valve plate itself, resulting in a lower flow efficiency for the air at the single air guide hole from the outside of the compression cylinder to the inside of the compression cylinder.
Therefore, how to improve the efficiency of the air at the single air guide hole flowing from the outside of the compression cylinder to the inside of the compression cylinder through the air guide hole is a technical problem to be solved in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model provides a swing piston, a two-stage compressor and a vehicle, aiming at solving the technical problem of how to improve the efficiency of the air at a single air guide hole flowing into a compression cylinder from the outside of the compression cylinder through the air guide hole in the prior art.
In order to achieve the purpose, the utility model adopts the technical scheme that:
according to one aspect of the present invention, there is provided a swing piston comprising a head end and a tail end;
the head end is configured into a round cake shape, the tail end is configured into a circular ring shape, and the axial lead of the head end and the axial lead of the tail end are perpendicular to each other;
the head end is communicated with an air inlet channel, wherein the air inlet channel and two end surfaces of the head end form an air inlet part and an air outlet part respectively, and the air inlet part is positioned between the air outlet part and the tail end;
a valve plate is detachably arranged on the head end and can be opened and closed to cover the exhaust port;
the valve block is provided with an air guide through hole, when a gap is formed between the valve block and the head end, the air inlet channel is communicated with the exhaust port through the gap between the valve block and the head end, and when the valve block is tightly attached to the head end, the air inlet channel is in a cut-off state with the exhaust port.
Furthermore, the profile of the air guide through hole is positioned in the profile of the valve plate, and a space is reserved between the profile of the air guide through hole and the profile of the exhaust port part.
Further, the device also comprises a mounting screw;
the head end is provided with a threaded hole;
the valve plate is provided with an installation through hole, a space is reserved between the outline of the installation through hole and the outline of the air guide through hole, and when the valve plate is arranged at the head end, a space is reserved between the outline of the installation through hole and the outline of the air outlet;
the mounting screw penetrates through the mounting through hole to be connected with the threaded hole.
Furthermore, a weight changing part is arranged between the head end and the tail end;
the weight-changing part is provided with at least one hole or groove for reducing the mass of the weight-changing part, or the weight-changing part is provided with at least one convex rib for increasing the mass of the weight-changing part.
Furthermore, a circular ring-shaped piston ring is detachably arranged on the head end;
the head end is provided with a circumferential mounting groove, and the piston ring is arranged in the mounting groove.
Further, the device also comprises a positioning pin;
a positioning groove is concavely arranged in the mounting groove, wherein the opening direction of the positioning groove points to the circumference of the head end;
the piston ring is arranged into an open piston ring, a positioning opening with a preset distance is formed between two ends of the piston ring at the opening, and the opening direction of the positioning opening points to the circle center of the piston ring;
the two ends of the positioning pin are respectively arranged in the positioning groove and the positioning hole.
According to one aspect of the present invention, there is provided a two-stage compressor including a low pressure piston, a high pressure piston, and a crankshaft;
the low-pressure piston and the high-pressure piston are respectively movably connected with the crankshaft;
the low pressure piston is arranged as a pendulum piston as described above.
According to an aspect of the utility model, there is provided a vehicle comprising a two-stage compressor as described above.
The technical scheme has the following advantages or beneficial effects:
according to the oscillating piston provided by the utility model, the air guide through hole is formed in the valve plate, so that when an air guide gap (equivalent to an air guide gap in the prior art) is formed between the deformed valve plate and the head end (equivalent to a piston body in the prior art), air positioned in the air guide gap can cross the valve plate from the outline edge of the valve plate and is injected into a piston cylinder (equivalent to a compression cylinder in the prior art), and can penetrate through the air guide through hole in the valve plate and is injected into the piston cylinder.
Drawings
Fig. 1 is a schematic structural view of a swing piston provided in embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a swing piston provided in embodiment 1 of the present invention;
FIG. 3 is an enlarged view of FIG. 2;
fig. 4 is a schematic structural view of a piston ring provided in embodiment 1 of the present invention;
fig. 5 is a schematic structural view of a piston ring provided in embodiment 1 of the present invention;
fig. 6 is a schematic structural diagram of a two-stage compressor according to embodiment 2 of the present invention.
Detailed Description
Example 1:
in the present embodiment, with reference to fig. 1 to 3, a swing piston is provided, comprising a head end 01 and a tail end 02;
the head end 01 is configured into a round cake shape, the tail end 02 is configured into a circular ring shape, and the axial lead of the head end 01 and the axial lead of the tail end 02 are perpendicular to each other;
the head end 01 is penetrated by an air inlet channel 03, wherein the air inlet channel 03 and two end surfaces of the head end 01 form an air inlet part 04 and an air outlet part 05 respectively, and the air inlet part 04 is positioned between the air outlet part 05 and the tail end 02;
the head end 01 is detachably provided with a valve plate 06, and the valve plate 06 can be opened and closed to cover the exhaust port 05;
the valve plate 06 is provided with an air guide through hole 100, when a gap exists between the valve plate 06 and the head end 01, the air inlet channel 03 is communicated with the exhaust port 05 through the gap between the valve plate 06 and the head end 01, and when the valve plate 06 is tightly attached to the head end 01, the air inlet channel 03 and the exhaust port 05 are in a cut-off state.
Referring to fig. 1, the head end 01 is a piston portion, and the tail end 02 is a circular ring portion for mounting a bearing; the leading end 01 is arranged in a pie shape, and the trailing end 02 is arranged in a circular ring shape so that the axial line of the leading end 01 and the axial line of the trailing end 02 are perpendicular to each other.
Referring to fig. 2 or 3, an air inlet passage 03 is provided on the head end 01, and the air inlet passage 03 penetrates the head end 01 along the axial direction of the head end 01, so that an air inlet portion 04 is formed on one end surface of the head end 01, and an air outlet portion 05 is formed on the other end surface of the head end 01; the inlet portion 04 is located between the outlet portion 05 and the tail end 02.
Referring to fig. 1, the valve plate 06 is detachably connected to the head end 01; preferably, with reference to fig. 1, the oscillating piston also comprises a mounting screw 07;
the head end 01 is provided with a threaded hole (not shown in the figure);
the valve plate 06 is provided with a mounting through hole (not shown), wherein a space is reserved between the contour of the mounting through hole and the contour of the air guide through hole 100, and when the valve plate 06 is arranged at the head end 01, a space is reserved between the contour of the mounting through hole and the contour of the air outlet part 05;
the mounting screw 07 penetrates the mounting through hole to be connected to the threaded hole.
Penetrate the mounting hole and be connected with the screw hole through mounting screw 07, can realize being connected the detachable of valve block 06 and head end 01.
The valve plate 06 can cover at least any one of the exhaust port parts 05; for example: if only one air inlet channel 03 is arranged on the head end 01, only one air outlet 05 is formed on the head end 01, and the valve plate 06 can cover the air outlet 05; for another example: if the head end 01 is provided with two air inlet channels 03, then two exhaust port parts 05 can be formed on the head end 01, so that the valve sheet 06 can cover the two exhaust port parts 05.
The shape of valve plate 06 and the position of exhaust port 05 can be flexibly set, for example: if only one air outlet 05 is arranged, the valve plate 06 can be in any shape as long as the valve plate 06 can cover the air outlet 05; another example is: if there are only two air outlet portions 05, the valve sheet 06 may be any shape as long as the valve sheet 06 can cover the two air outlet portions 05 at the same time.
In this embodiment, two exhaust port portions 05 are preferably provided, the two exhaust port portions 05 are symmetrically provided with respect to the center of the head end 01, the profile of any one exhaust port portion 05 is limited within the range of the circumferential profile of the head end 01, and a space is left between the profile of any one exhaust port portion 05 and the circumferential profile of the head end 01; correspondingly, referring to fig. 1, the valve sheet 06 is configured into a sheet shape with two slightly wider ends and a slightly narrower middle, and the middle of the valve sheet 06 is configured to be detachably connected with the head end 01, so that two ends of the valve sheet 06 respectively cover one of the exhaust port portions 05; the middle of the valve plate 06 is slightly narrow, so that the valve plate can form a weight reduction area, and the purpose is to reduce the mass of the valve plate.
The valve plate 06 is provided with an air guide through hole 100, so that the valve plate 06 positioned at the air guide through hole 100 is in a through shape.
Preferably, referring to fig. 1, the air guide through hole 100 has a profile within the profile of the valve sheet 06 with a space between the profile of the air guide through hole 100 and the profile of the discharge port part 05.
When the valve plate 06 covers the exhaust port 05, the valve plate 06 is in close contact with the head end 01, so that the air guide through hole 100 and the exhaust port 05 are in a cut-off state; when the valve plate 06 is separated from the exhaust port 05, an air guide gap is formed between the valve plate 06 and the head end 01, so that the air guide through hole 100 is in a state of being conducted with the exhaust port 05 through the air guide gap.
In practical application, the head end 01 and the valve plate 06 of the swing piston are respectively arranged in the piston cylinder, and the head end 01 and the valve plate 06 are in reciprocating motion macroscopically relative to the piston cylinder;
in the motion process that the head end 01 is in a relaxation state relative to the piston cylinder, negative pressure is formed in the piston cylinder, and the outside of the piston cylinder keeps atmospheric pressure, so that the valve block 06 at the air inlet channel 03 is acted by the atmospheric pressure to form a motion trend that the valve block 06 and the head end 01 are separated from each other, a part of the valve block 06 (a part of the valve block 06 covering the exhaust port part 05) is deformed, and the air guide gap is formed between the valve block 06 and the head end 01; at the moment, air outside the piston cylinder is injected into the air guide gap through the air inlet channel 03 and is blocked by the valve plate 06, so that a movement trend that the air in the air guide gap flows along multiple directions of the valve plate 06 is formed, wherein the air in the direction from the air guide gap to the air guide through hole 100 can flow through the air guide through hole 100, so that the air can be injected into the piston cylinder through the air guide through hole 100;
in the movement process that the head end 01 is in a contraction state relative to the piston cylinder, positive pressure is formed in the piston cylinder, and atmospheric pressure is kept outside the piston cylinder, so that the valve block 06 is tightly contacted with the head end 01 under the action of the positive pressure in the piston cylinder, and an air guide gap between the valve block 06 and the head end 01 disappears; at this time, air outside the piston cylinder is blocked by the valve sheet 06 at the air intake passage 03 and stays outside the piston cylinder.
In the prior art (an air guide device for a valve plate of a compressor, application number is 201620046667.X), an air guide through hole is not formed in a valve plate, so that when an air guide gap is formed between the valve plate and a piston body after deformation of the valve plate, air at the air guide gap can only cross the valve plate from the contour edge of the valve plate and is injected into a compression cylinder, but cannot penetrate the valve plate and be injected into the compression cylinder.
In the oscillating piston of the present embodiment, the air guide through hole 100 is disposed on the valve sheet 06, so that when an air guide gap (equivalent to an air guide gap in the prior art) is formed between the deformed valve sheet 06 and the head end 01 (equivalent to a piston body in the prior art), air at the air guide gap can not only cross the valve sheet 06 from the contour edge of the valve sheet 06 and be injected into a piston cylinder (equivalent to a compression cylinder in the prior art), but also can penetrate through the air guide through hole 100 on the valve sheet 06 and be injected into the piston cylinder.
Therefore, the swing piston provided by the embodiment solves the technical problem of how to improve the efficiency of the air at the single air guide hole flowing into the compression cylinder from the outside of the compression cylinder through the air guide hole in the prior art.
Further, referring to fig. 1, a weight changing portion 08 is disposed between the head end 01 and the tail end 02;
at least one hole or groove for reducing the mass of the weight changing portion 08 is provided in the weight changing portion 08, or at least one rib for increasing the mass of the weight changing portion 08 is provided in the weight changing portion 08.
The weight-changing section 08 is located between the head end 01 and the tail end 02, wherein the reciprocating mass of the oscillating piston is changed when the mass of the weight-changing section 08 is changed; when the oscillating piston is applied to a two-stage compressor in which the oscillating piston is used as a low-pressure piston and the second piston is provided as a reciprocating piston and the second piston is used as a high-pressure piston, the reciprocating mass of the oscillating piston and the reciprocating mass of the second piston can be configured to be the same.
Reciprocating masses are also referred to as reciprocating masses; the piston connecting rod assembly at least comprises a piston and a connecting rod, and the piston and the connecting rod are simplified into a point A and a point B respectively in the movement process of the piston connecting rod assembly, for example: the head end 01 of the oscillating piston is simplified into a point A, and the tail end 02 of the oscillating piston is simplified into a point B, wherein the point A makes reciprocating linear motion in a piston cylinder, the point B makes rotary motion in the cylinder body, but the piston connecting rod assembly makes plane motion integrally; according to the principle that the motion states of all mass points on a linear motion system are consistent, the mass of the piston and the mass of the connecting rod are considered to be concentrated on the point A in the reciprocating motion process, and the mass concentrated on the point A is the reciprocating mass or the reciprocating motion mass of the piston and the connecting rod;
in the embodiment, the swing piston comprises a piston ring, a valve plate 06, a bolt, a pin and a swing piston; the reciprocating mass of the oscillating piston is specifically as follows: the sum of the mass of the piston ring, the mass of the valve plate 06, the mass of the bolt, the mass of the pin and the reciprocating mass of the oscillating piston acts on the mass of the piston-like structure.
The moving mass of the piston-connecting-rod assembly can be obtained by formula methods, which are known to those skilled in the art and will not be described in detail herein.
The weight-changing part 08 is provided with the groove, so that the mass of the weight-changing part 08 is reduced, the mass of the connecting rod is further reduced, and the purpose of changing the reciprocating mass acting on the piston is achieved; or, the weight-changing part 08 is provided with a convex rib, so that the mass of the weight-changing part 08 is increased, the mass of the connecting rod is increased, and the purpose of changing the reciprocating mass acting on the piston is achieved.
It should be understood that the hole-like structure or the groove-like structure formed in the connecting rod portion is not obtained by secondary processing on the finished oscillating piston but directly obtained when the oscillating piston is manufactured, and it is only necessary to design the position of the hole-like structure or the groove-like structure after removing material before actually manufacturing the oscillating piston and then remanufacturing the oscillating piston; similarly, the formation of the rib on the connecting rod portion is not obtained by secondary processing on the finished oscillating piston, but is directly obtained in the process of manufacturing the oscillating piston, and it is only necessary to design the position of the rib after adding material before actually manufacturing the oscillating piston, and then remanufacture the oscillating piston.
The reciprocating mass of the oscillating piston and the reciprocating mass of the second piston can be balanced in a two-stage compressor by changing the reciprocating mass of the piston and the connecting rod in a manner of providing a groove-shaped structure or a hole-shaped structure at the weight changing part 08 or providing a convex rib at the weight changing part 08 and then matching the mass of other parts of the oscillating piston.
Furthermore, with reference to fig. 1 to 5, a ring-shaped piston ring 09 is detachably provided on the head end 01 of the oscillating piston;
be provided with on head end 01 and be the mounting groove of circumference encirclement form, piston ring 09 is set up in the mounting groove.
The piston ring 09 is used for sealing a gap between the swing piston and the inner wall of the piston cylinder, so that compressed gas in the piston cylinder is prevented from overflowing from the gap between the swing piston and the inner wall of the piston cylinder in the compression process.
The purpose of the mounting groove is to limit the position of the piston ring 09 at least in the axial direction, avoiding the piston ring 09 to separate from each other relative to the oscillating piston.
Specifically, in order to prevent the piston ring 09 from rotating relative to the swing piston, the following is preferably adopted.
With reference to fig. 2 to 5, the oscillating piston also comprises a dowel 10;
a positioning groove 11 is concavely arranged in the mounting groove, wherein the opening direction of the positioning groove 11 points to the circumference of the head end 01;
the piston ring 09 is an open-shaped piston ring 09, a positioning opening 12 with a preset distance is formed between two ends of the piston ring 09 at the opening, and the opening direction of the positioning opening 12 points to the circle center of the piston ring 09;
the two ends of the positioning pin 10 are respectively arranged in the positioning groove 11 and the positioning opening 12.
The positioning pin 10 is inserted on the one hand into the positioning groove 11 and on the other hand into the positioning opening 12, so that the positioning pin 10 connects the piston ring 09 in the circumferential direction relative to the oscillating piston; the locating pin 10 serves to prevent the piston ring 09 from rotating relative to the oscillating piston when the piston ring 09 has a tendency to move in the circumferential direction relative to the oscillating piston.
Example 2:
in the present embodiment, referring to fig. 6, there is provided a two-stage compressor including a low pressure piston 1, a high pressure piston 2, and a crankshaft 3;
the low-pressure piston 1 and the high-pressure piston 2 are respectively movably connected with a crankshaft 3;
the low-pressure piston 1 is provided as a pendulum piston as in the foregoing embodiment 1.
The low-pressure piston 1 is configured as a pendulum piston, while the high-pressure piston 2 is configured as a reciprocating piston; during the operation of the two-stage compressor, the oscillating piston (in particular, the head end 01 of the reciprocating piston) exhibits both the characteristics of reciprocating motion and oscillating motion with respect to the piston cylinder, while the reciprocating piston exhibits only the characteristics of reciprocating motion.
The reciprocating piston in this embodiment has the same structure and effect as the reciprocating piston in embodiment 1, and is not described again here.
Example 3:
in the present embodiment, there is provided a vehicle including the two-stage compressor as in the foregoing embodiment 2.
The vehicle is specifically a fuel-oil vehicle or an electric vehicle of a braking system for driving/parking by using compressed air, or a fuel-oil vehicle or an electric vehicle of an air suspension system controlled by using compressed air, or a fuel-oil vehicle or an electric vehicle of a clutch system or other auxiliary gas-using devices controlled by using compressed air, wherein the other auxiliary gas-using devices include, but are not limited to, a pneumatic door, a pneumatic lifting (air bag) and the like.
The two-stage compressor in this embodiment has the same structure and effect as the two-stage compressor in embodiment 2, and is not described again here.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The oscillating piston is characterized by comprising a head end and a tail end;
the head end is configured into a round cake shape, the tail end is configured into a circular ring shape, and the axial lead of the head end and the axial lead of the tail end are perpendicular to each other;
the head end is communicated with an air inlet channel, wherein the air inlet channel and two end surfaces of the head end form an air inlet part and an air outlet part respectively, and the air inlet part is positioned between the air outlet part and the tail end;
a valve plate is detachably arranged on the head end and can be opened and closed to cover the exhaust port;
the valve block is provided with an air guide through hole, when a gap is formed between the valve block and the head end, the air inlet channel is communicated with the exhaust port through the gap between the valve block and the head end, and when the valve block is tightly attached to the head end, the air inlet channel is in a cut-off state with the exhaust port.
2. The oscillating piston of claim 1, wherein the profile of the air guide through hole is located within the profile of the valve plate with a space between the profile of the air guide through hole and the profile of the vent port.
3. The oscillating piston of claim 2 further comprising mounting screws;
the head end is provided with a threaded hole;
the valve plate is provided with an installation through hole, a space is reserved between the outline of the installation through hole and the outline of the air guide through hole, and when the valve plate is arranged at the head end, a space is reserved between the outline of the installation through hole and the outline of the air outlet;
the mounting screw penetrates through the mounting through hole to be connected with the threaded hole.
4. The oscillating piston according to any one of claims 1 to 3, characterised in that a weight portion is provided between the head end and the tail end;
the weight-changing part is provided with at least one hole or groove for reducing the mass of the weight-changing part, or the weight-changing part is provided with at least one convex rib for increasing the mass of the weight-changing part.
5. The oscillating piston of claim 1, wherein said head end is removably provided with a ring-shaped piston ring;
the head end is provided with a circumferential mounting groove, and the piston ring is arranged in the mounting groove.
6. The oscillating piston of claim 5 further comprising a locating pin;
a positioning groove is concavely arranged in the mounting groove, wherein the opening direction of the positioning groove points to the circumference of the head end;
the piston ring is an open-ended piston ring, a positioning opening with a preset distance is formed between two ends of the piston ring at the opening, and the opening direction of the positioning opening points to the circle center of the piston ring;
the two ends of the positioning pin are respectively arranged in the positioning groove and the positioning hole.
7. A two-stage compressor comprising a low pressure piston, a high pressure piston, and a crankshaft;
the low-pressure piston and the high-pressure piston are respectively movably connected with a crankshaft;
the low-pressure piston is provided as a pendulum piston according to any of claims 1 to 6.
8. Vehicle, characterized in that it comprises a two-stage compressor according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220073188.2U CN217029304U (en) | 2022-01-12 | 2022-01-12 | Oscillating piston, two-stage compressor and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220073188.2U CN217029304U (en) | 2022-01-12 | 2022-01-12 | Oscillating piston, two-stage compressor and vehicle |
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| Publication Number | Publication Date |
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| CN217029304U true CN217029304U (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220073188.2U Active CN217029304U (en) | 2022-01-12 | 2022-01-12 | Oscillating piston, two-stage compressor and vehicle |
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| Country | Link |
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| CN (1) | CN217029304U (en) |
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- 2022-01-12 CN CN202220073188.2U patent/CN217029304U/en active Active
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