Liquid impact prevention mechanism for static disc

Abstract

The invention relates to the technical field of static disc liquid impact prevention, and particularly discloses a static disc liquid impact prevention mechanism which comprises a static scroll disc, a positioning disc is installed at the bottom of the inner side of the static scroll disc, a first positioning plate is installed at the top of the positioning disc, and a second positioning plate is installed at the position, close to the front face, of the top of the positioning disc. A positioning pin is installed at the top of the positioning disc, a first liquid impact prevention valve plate is installed on one side of the top of the first positioning plate, a second liquid impact prevention valve plate is installed on the other side of the top of the first positioning plate, an exhaust valve plate is installed in the middle of the top of the first positioning plate, and a positioning hole is formed in the outer side of the top of the static scroll plate. The liquid refrigerant can be discharged through the liquid impact prevention hole and cannot continue to participate in compression, when the refrigerant of the air suction port is in a gas state, the pressure can be suddenly reduced, the pressure of the compression cavity can be lower than the condensing pressure, the valve plate can automatically return, and the design is verified through tests, and structural damage caused by liquid impact of the vortex can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid impact prevention of a stationary disc, and more particularly to a liquid impact prevention mechanism of a stationary disc. Background Art

[0002] The compression chamber of the electric scroll compressor is mainly composed of two main parts: the orbiting scroll and the stationary scroll. Both of these disks are involute shaped and interlock with each other to form multiple crescent-shaped compression chambers. During the working process of suction, compression and exhaust, the stationary scroll is fixed on the frame, while the orbiting scroll is driven by the eccentric shaft and rotates in a plane with a small radius around the center of the stationary scroll base circle. This design allows the gas to be gradually compressed in the compression chamber formed by the engagement of the orbiting and stationary scrolls, and then continuously discharged through the axial hole of the center component of the stationary scroll.

[0003] When the compressor is used in an extremely cold environment, if the evaporator cannot control sufficient superheat, the refrigerant entering the compressor suction port is low-temperature and low-pressure liquid refrigerant. Since the liquid cannot be compressed, forced compression will cause liquid hammer on the scroll, and long-term operation will cause damage to the scroll. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a static disk liquid impact prevention mechanism to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solutions: a static disk anti-liquid impact mechanism, comprising a static scroll disk, a positioning disk is installed at the bottom of the inner side of the static scroll disk, a first positioning plate is installed on the top of the positioning disk, a second positioning plate is installed near the front of the top of the positioning disk, a positioning pin is installed on the top of the positioning disk, a first anti-liquid impact valve plate is installed on one side of the top of the first positioning plate, a second anti-liquid impact valve plate is installed on the other side of the top of the first positioning plate, an exhaust valve plate is installed in the middle of the top of the first positioning plate, a positioning hole is opened on the outer side of the top of the static scroll disk, a different diameter positioning platform is installed at the bottom of the static scroll disk, an exhaust hole is opened in the middle of the bottom of the different diameter positioning platform, a first anti-liquid impact hole is opened on one side of the bottom of the different diameter positioning platform, and an arc groove is installed on the other side of the bottom of the different diameter positioning platform.

[0006] Furthermore, the diameter of the outer side of the first positioning plate is the same as the diameter of the outer side of the second positioning plate, and the arcs of the outer side of the first positioning plate and the outer side of the second positioning plate are on the same circle.

[0007] Furthermore, the inner diameter of the fixed scroll disk and the outer diameter of the positioning disk are clearance-matched, and the bottom of the first positioning plate is attached to the top of the positioning disk.

[0008] Furthermore, a circular notch is provided on the front side of the second positioning plate, and the center of the circular notch on the front side of the second positioning plate is in the same straight line as the center of the positioning pin.

[0009] Furthermore, the diameter of the positioning disc is the same as the diameter of the top of the different-diameter positioning platform, and the diameter of the outer side of the arc-shaped groove is the same as the diameter of the bottom of the different-diameter positioning platform.

[0010] Furthermore, the angle at which the first anti-liquid impact valve plate is connected to the second anti-liquid impact valve plate is one hundred and eighty degrees, and a positioning notch is provided on the top of the first positioning plate, and the size of the positioning notch on the top of the first positioning plate matches the bottom of the exhaust valve plate.

[0011] Technical effects and advantages of the present invention: The present invention designs two drainage holes on the static disk, the first one is at 1 / 4 circle of the static disk profile, and the second one is at 3 / 4 circle of the static disk profile. A steel valve plate is installed on the upper part of the anti-liquid impact hole. When the vortex works normally, the refrigerant gas with low temperature and low pressure flows into the suction port of the vortex. During the meshing process of the dynamic and static disks, the inhaled gas will be gradually compressed to the exhaust port. Since the gas is easily compressed, no large pressure will be generated at 1 / 4 circle and 3 / 4 circle of the static disk profile. Therefore, the valve plates of the two anti-liquid impact holes will not be pushed open by the large liquid pressure. At this time, the internal sealing of the vortex is good. When the vortex generates liquid impact, the refrigerant gas flowing into the vortex will be discharged. The air inlet is filled with low-temperature and low-pressure refrigerant liquid or a gas-liquid mixture. Since the liquid cannot be compressed, a large pressure will be generated at the 1 / 4 circle and 3 / 4 circle of the static disk profile, and the pressure is much larger than the condensation pressure. Therefore, the valve plates of these two anti-liquid impact holes will be pushed open by the large liquid pressure. At this time, the vortex is in the discharge mode, and the liquid refrigerant will be discharged through the anti-liquid impact holes and will not continue to participate in the compression. When the refrigerant at the air inlet is gaseous, the pressure will drop sharply. At this time, the pressure in the compression chamber will be lower than the condensation pressure, and the valve plate will automatically return to its position. This design has been verified by experiments and can effectively prevent the vortex from being structurally damaged due to liquid impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 It is a schematic diagram of the bottom of the overall structure of the present invention.

[0014] The accompanying drawings are marked as follows: 1. static scroll disk; 2. positioning disk; 3. first positioning plate; 4. second positioning plate; 5. positioning pin; 6. first anti-liquid impact valve plate; 7. second anti-liquid impact valve plate; 8. exhaust valve plate; 9. positioning hole; 10. different diameter positioning platform; 11. exhaust hole; 12. first anti-liquid impact hole; 13. second anti-liquid impact hole; 14. second anti-liquid impact hole; 15. arc groove. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples, and the static disk anti-liquid impact mechanism involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0016] Reference Figure 1 and Figure 2 The present invention provides a static disk anti-liquid impact mechanism, comprising a static scroll disk 1, a positioning disk 2 is installed at the bottom of the inner side of the static scroll disk 1, a first positioning plate 3 is installed on the top of the positioning disk 2, a second positioning plate 4 is installed near the front of the top of the positioning disk 2, a positioning pin 5 is installed on the top of the positioning disk 2, a first anti-liquid impact valve plate 6 is installed on one side of the top of the first positioning plate 3, a second anti-liquid impact valve plate 7 is installed on the other side of the top of the first positioning plate 3, and an exhaust valve plate 8 is installed in the middle of the top of the first positioning plate 3. A positioning hole 9 is provided on the outer side of the top of the static scroll 1, a different diameter positioning platform 10 is installed at the bottom of the static scroll 1, an exhaust hole 11 is provided in the middle of the bottom of the different diameter positioning platform 10, a first liquid-proof hole 12 is provided on one side of the bottom of the different diameter positioning platform 10, a hole 13 is provided on the other side of the bottom of the different diameter positioning platform 10, and an arc groove 15 is installed at the bottom of the different diameter positioning platform 10; two drainage holes are designed on the static disk, the first one is at 1 / 4 of the static disk line, and the second one is at 3 / 4 of the static disk line, and the upper part of the liquid-proof hole is provided with The steel valve plate, when the scroll is working normally, the refrigerant gas with low temperature and low pressure flows into the scroll suction port. During the meshing process of the moving and stationary discs, the gas sucked in will be gradually compressed to the exhaust port. Since the gas is easily compressed, no large pressure will be generated at the 1 / 4 circle and 3 / 4 circle of the stationary disc profile. Therefore, the valve plate with these two anti-liquid impact holes will not be pushed open by the large liquid pressure. At this time, the internal seal of the scroll is good. When the vortex produces liquid impact, the refrigerant liquid or gas-liquid mixture that flows into the scroll suction port is low temperature and low pressure. Since the liquid is not It can be compressed, and a large pressure will be generated at 1 / 4 circle and 3 / 4 circle of the static disc profile, and it is much larger than the condensation pressure. Therefore, the valve plates of these two anti-liquid impact holes will be pushed open by the large liquid pressure. At this time, the vortex is in discharge mode, and the liquid refrigerant will be discharged through the anti-liquid impact holes and will not continue to participate in compression. When the refrigerant at the suction port is gaseous, the pressure will drop sharply. At this time, the pressure in the compression chamber will be lower than the condensation pressure, and the valve plate will automatically return to its position. This design has been verified by experiments and can effectively prevent the vortex from structural damage due to liquid impact.

[0017] In a preferred embodiment, the diameter of the outer side of the first positioning plate 3 is the same as the diameter of the outer side of the second positioning plate 4 , and the arcs of the outer side of the first positioning plate 3 and the outer side of the second positioning plate 4 are on the same circle.

[0018] In a preferred embodiment, the inner diameter of the fixed scroll 1 and the outer diameter of the positioning disk 2 are gap-matched, and the bottom of the first positioning plate 3 fits on the top of the positioning disk 2 .

[0019] In a preferred embodiment, a circular notch is formed on the front side of the second positioning plate 4 , and the center of the circular notch on the front side of the second positioning plate 4 is in the same straight line as the center of the positioning pin 5 .

[0020] In a preferred embodiment, the diameter of the positioning disc 2 is the same as the diameter of the top of the different-diameter positioning platform 10 , and the diameter of the outer side of the arc-shaped groove 15 is the same as the diameter of the bottom of the different-diameter positioning platform 10 .

[0021] In a preferred embodiment, the angle between the first anti-liquid impact valve plate 6 and the second anti-liquid impact valve plate 7 is one hundred and eighty degrees, and a positioning notch is provided at the top of the first positioning plate 3. The size of the positioning notch at the top of the first positioning plate 3 matches the bottom of the exhaust valve plate 8.

[0022] The working principle of the present invention is as follows: two drainage holes are designed on the static disk, the first one is at 1 / 4 circle of the static disk profile, and the second one is at 3 / 4 circle of the static disk profile. A steel valve plate is installed on the upper part of the anti-liquid impact hole. When the vortex works normally, the refrigerant gas with low temperature and low pressure flows into the vortex suction port. During the meshing process of the dynamic and static disks, the inhaled gas will be gradually compressed to the exhaust port. Since the gas is easily compressed, no large pressure will be generated at 1 / 4 circle and 3 / 4 circle of the static disk profile. Therefore, the valve plates of the two anti-liquid impact holes will not be pushed open by the large liquid pressure. At this time, the internal sealing of the vortex is good. When the vortex produces liquid impact, the flow The refrigerant entering the vortex suction port is low-temperature and low-pressure refrigerant liquid or gas-liquid mixture. Since the liquid cannot be compressed, a large pressure will be generated at the 1 / 4 circle and 3 / 4 circle of the static disk profile, and it is much larger than the condensation pressure. Therefore, the valve plates of these two anti-liquid impact holes will be pushed open by the large liquid pressure. At this time, the vortex is in discharge mode, and the liquid refrigerant will be discharged through the anti-liquid impact holes and will not continue to participate in compression. When the refrigerant at the suction port is gaseous, the pressure will drop sharply. At this time, the pressure in the compression chamber will be lower than the condensation pressure, and the valve plate will automatically return to its position. This design has been verified by experiments and can effectively prevent the vortex from structural damage due to liquid impact.

[0023] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change; Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: 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 static disk anti-liquid impact mechanism, comprising a static scroll disk (1), characterized in that: A positioning disc (2) is installed at the bottom of the inner side of the fixed scroll disc (1), a first positioning plate (3) is installed at the top of the positioning disc (2), a second positioning plate (4) is installed near the front of the top of the positioning disc (2), a positioning pin (5) is installed at the top of the positioning disc (2), a first liquid-proof valve plate (6) is installed on one side of the top of the first positioning plate (3), a second liquid-proof valve plate (7) is installed on the other side of the top of the first positioning plate (3), and the top of the first positioning plate (3) is provided with a plurality of positioning pins (5). An exhaust valve plate (8) is installed in the middle of the fixed scroll (1), a positioning hole (9) is opened on the outer side of the top of the fixed scroll (1), a different-diameter positioning platform (10) is installed at the bottom of the fixed scroll (1), an exhaust hole (11) is opened in the middle of the bottom of the different-diameter positioning platform (10), a first liquid-proof hole (12) is opened on one side of the bottom of the different-diameter positioning platform (10), and a hole (13) is opened on the other side of the bottom of the different-diameter positioning platform (10); and an arc groove (15) is installed at the bottom of the different-diameter positioning platform (10).

2. A static plate anti-liquid impact mechanism according to claim 1, characterized in that: The diameter of the outer side of the first positioning plate (3) is the same as the diameter of the outer side of the second positioning plate (4), and the arcs of the outer side of the first positioning plate (3) and the outer side of the second positioning plate (4) are on the same circle.

3. The static plate anti-liquid impact mechanism according to claim 1, characterized in that: The inner diameter of the stationary scroll disk (1) and the outer diameter of the positioning disk (2) are clearance-matched, and the bottom of the first positioning plate (3) is fitted on the top of the positioning disk (2).

4. The static plate anti-liquid impact mechanism according to claim 1, characterized in that: A circular notch is provided on the front side of the second positioning plate (4), and the center of the circular notch on the front side of the second positioning plate (4) is on the same straight line as the center of the positioning pin (5).

5. The static plate anti-liquid impact mechanism according to claim 1, characterized in that: The diameter of the positioning disc (2) is the same as the diameter of the top of the different-diameter positioning platform (10), and the diameter of the outer side of the arc-shaped groove (15) is the same as the diameter of the bottom of the different-diameter positioning platform (10).

6. The static plate anti-liquid impact mechanism according to claim 1, characterized in that: The angle at which the first anti-liquid impact valve plate (6) and the second anti-liquid impact valve plate (7) are connected is one hundred and eighty degrees. A positioning notch is provided at the top of the first positioning plate (3). The size of the positioning notch at the top of the first positioning plate (3) matches the bottom of the exhaust valve plate (8).

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