Air suction valve plate of double-reed double-exhaust compressor

Abstract

The invention discloses a double-reed double-exhaust compressor air suction valve plate, and relates to the technical field of compressor parts, the double-reed double-exhaust compressor air suction valve plate comprises a valve plate body, the valve plate body is provided with two embedding grooves, each embedding groove is internally provided with a reed, a gas channel is reserved between the edge of each reed and the inner wall of the corresponding embedding groove, and the valve plate body is provided with two exhaust holes. The exhaust hole is formed in one side of the joint of the reed and the embedded groove and communicates with the gas channel, and the reed comprises a fixing part, a cantilever and a tongue. The double-reed design is adopted, the two reeds synchronously respond to the air suction action, the air suction amount is increased by more than 80% compared with a single-reed structure, the gradually-changing width design of the reeds ensures smooth airflow and avoids local vortexes, smooth arc-shaped transition is adopted in the connecting positions of the reeds, the fixing part and the cantilever, the stress concentration coefficient is reduced, and the air suction effect is improved. And the fracture problem caused by long-term high-frequency vibration is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor parts, in particular to a double-lip-spring double-exhaust-port compressor suction valve plate. BACKGROUND

[0002] During the operation of the compressor, the suction valve plate is a key component for controlling the gas suction and preventing the backflow of the gas, and the structural design thereof directly affects the suction efficiency, exhaust smoothness and overall operation stability of the compressor.

[0003] However, the suction valve plate of the compressor in the prior art is mostly of a single-lip-spring single-exhaust-port structure, which is prone to slow suction response speed and limited gas suction amount, and is difficult to meet the suction demand of a high-power compressor, and the connection part of the lip spring and the valve plate body is mostly of a right-angle transition, which is prone to stress concentration after long-term operation, resulting in the fracture of the lip spring and the shortening of the service life of the valve plate. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a double-lip-spring double-exhaust-port compressor suction valve plate, which solves the problems of low suction efficiency and easy fracture of the lip spring of the existing compressor suction valve plate.

[0005] To achieve the above object, the present application is implemented by the following technical scheme: The double-lip-spring double-exhaust-port compressor suction valve plate comprises a valve plate body, two embedding grooves are formed in the valve plate body, one lip spring is installed in each embedding groove, a gas passage is left between the edge of the lip spring and the inner wall of the embedding groove, two semicircular concave exhaust ports are formed in the valve plate body, the exhaust ports are arranged on one side of the connection part of the lip spring and the embedding groove and are communicated with the gas passage, the lip spring comprises a fixed part, a cantilever and a tongue, the fixed part is fixed to the inner wall of the embedding groove, the cantilever is fixed between the fixed part and the tongue, and the fixed parts are smoothly and arcuately connected, the two lip springs gradually spread outward from the two tongues to the two fixed parts, the embedding groove at one side of the fixed part is communicated with the exhaust port, and the two embedding grooves are communicated at the close position of the two tongues.

[0006] In the present application, the width of the fixed end gradually increases from the cantilever to the inner wall of the embedding groove, and the width of the cantilever gradually decreases from the tongue to the fixed part.

[0007] In the present application, the first two-lip-spring arrangement and structural design are as follows: the two lip springs are symmetrically arranged on the valve plate body, and the included angle between the two lip springs is 26 0 -30 0 The sizes of the two lip springs are the same, and the two exhaust ports are located on the inner side of the two fixed parts.

[0008] Preferably, the inner side of the fixing part extends upward in an arc shape to form a first circular-arc groove, and the outer side of the fixing part extends upward in an arc shape to form a second circular-arc groove, the length of the upward extension of the inner side of the fixing part is greater than the length of the upward extension of the outer side of the fixing part, and the second circular-arc groove is larger than the first circular-arc groove.

[0009] Preferably, the two corners on one side of the valve piece body are each provided with a first circular chamfer, and the two corners on the other side of the valve piece body are each provided with a second circular chamfer, the second circular chamfer is larger than the first circular chamfer, the first circular chamfer and the second circular chamfer are each in transition with the side arc of the valve piece body, and three first positioning holes are formed in the valve piece body, two of the first positioning holes are located at the first circular chamfers, and the other first positioning hole is located between the two second circular chamfers.

[0010] Preferably, a first circular-arc protrusion is fixed in the middle of one of the second circular chamfers, and an arc-shaped gap is formed in the middle of the other second circular chamfer.

[0011] In the present application, the second two-tongue-spring arrangement and structural design are as follows: the two tongue springs are arranged asymmetrically on the valve piece body, and the included angle between the two tongue springs is 13 0 -15 0 The cantilever in one of the tongue springs is longer and wider than the cantilever in the other tongue spring, one exhaust hole is located on the inner side of one of the fixing parts, the other exhaust hole is located on the outer side of the other fixing part, and two through holes of different sizes are formed in the valve piece body.

[0012] Preferably, the inner side of the fixing part extends upward in an arc shape to form a first square groove, and the outer side of the fixing part extends upward in an arc shape to form a second square groove, the length of the upward extension of the inner side of each fixing part is greater than the length of the upward extension of the outer side of each fixing part, the fixing part connected by the long and wide cantilever is longer than the fixing part connected by the short and narrow cantilever, and the length of the upward extension of the inner side and the outer side is longer.

[0013] Preferably, the four corners of the valve piece body are each provided with the same third circular chamfer, the third circular chamfer is in transition with the side arc of the valve piece body, one second positioning hole is formed at each third circular chamfer, and a second circular-arc protrusion is arranged in the middle of one of the third circular chamfers.

[0014] Compared with the prior art, the present application has the following beneficial effects: 1. The double-tongue-spring design is adopted, the two tongue springs synchronously respond to the air suction action, the air suction amount is increased by more than 80% compared with the single-tongue-spring structure, the gradually changing width design of the tongue spring ensures smooth airflow and avoids local vortex; 2. The connection parts of the tongue spring, the fixing part and the cantilever adopt smooth arc transition, the stress concentration coefficient is reduced, the fracture problem caused by long-term high-frequency vibration is avoided, the groove structure of the fixing part disperses local stress, and the structural stability is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention from a top view. Figure 2 This is a top view of the second embodiment of the present invention.

[0016] Reference numerals: 1. Valve plate body; 2. Embedded groove; 3. Exhaust hole; 4. Fixing part; 5. Cantilever; 6. Tongue; 7. First arc groove; 8. Second arc groove; 9. First rounded chamfer; 10. Second rounded chamfer; 11. First positioning hole; 12. First arc protrusion; 13. Arc notch; 14. Through hole; 15. First square groove; 16. Second square groove; 17. Third rounded chamfer; 18. Second positioning hole; 19. Second arc protrusion. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, including the first embodiment and the second embodiment.

[0018] like Figure 1 As shown, the first embodiment is as follows: The intake valve of a dual-spring dual-exhaust compressor includes a valve body 1. The valve body 1 has two recessed slots 2, each containing a spring. A gas passage is provided between the edge of the spring and the inner wall of the recessed slot 2. The valve body 1 also has two semi-circular concave exhaust holes 3, located on one side of the connection between the spring and the recessed slot 2 and communicating with the gas passage. The spring includes a fixing part 4, a cantilever 5, and a tongue 6, all integrally formed. The fixing part 4 is fixed to the inner wall of the recessed slot 2, and the cantilever 5 is fixed to the fixing part 4 and the tongue 6. The transition between the two tongues and the fixed parts is a smooth arc. The two tongues 6 gradually diffuse outward from the two fixed parts 4. The embedded groove 2 on one side of the fixed part 4 is connected to the exhaust hole 3. The double exhaust hole 3 is precisely connected to the gas channel. The exhaust area is increased by 60% compared with the single exhaust hole structure, which effectively reduces gas retention. The semi-circular concave design of the exhaust hole 3 fits the airflow trajectory and further reduces exhaust resistance. The two embedded grooves 2 are connected at the close point of the two tongues 6 to ensure that the airflow controlled by the two tongues can smoothly merge and enter the compressor cylinder.

[0019] In this invention, the width of the fixed end increases sequentially from the cantilever 5 toward the inner wall of the embedding groove 2, and the width of the cantilever 5 decreases sequentially from the tongue 6 toward the fixed part 4.

[0020] Two tongue springs are symmetrically arranged on the valve body 1, and the included angle between the two tongue springs is 26°. 0 -30 0， The axis of symmetry of the two reeds is the central axis of the top of the valve body 1. In practice, the included angle between the two reeds is chosen to be 28°.0 The two tongue springs are the same size, and the two exhaust holes 3 are located inside the two fixing parts 4.

[0021] The inner side of the fixing part 4 extends upward in an arc shape to form a first arc groove 7, and the outer side extends upward in an arc shape to form a second arc groove 8. The length of the inner side of the fixing part 4 extending upward is greater than the length of the outer side extending upward, and the second arc groove 8 is greater than the first arc groove 7. The design of the first arc groove 7 and the second arc groove 8 can guide the flow direction of the airflow, reduce the eddy currents of the airflow near the fixing part 4, and also reduce the weight of the fixing part 4.

[0022] The valve body 1 has two first rounded chamfers 9 on one side and two second rounded chamfers 10 on the other side. The second rounded chamfers 10 are larger than the first rounded chamfers 9. Both the first rounded chamfers 9 and the second rounded chamfers 10 are transitioned to the side arc of the valve body 1. This can prevent personnel from being scratched by sharp corners during valve assembly and use. It can also reduce the eddy currents of airflow at the edge of the valve body 1 and reduce airflow resistance. Three first positioning holes 11 are provided on the valve body 1. Two of the first positioning holes 11 are located at the first rounded chamfers 9, and the other first positioning hole 11 is located between the two second rounded chamfers 10.

[0023] One of the second round chamfers 10 has a first arc protrusion 12 fixed in the middle, and the other second round chamfer 10 has an arc notch 13 in the middle to avoid the valve plate body 1 being installed in reverse during assembly.

[0024] like Figure 2 As shown, the second embodiment: The difference from the first embodiment lies in the arrangement and design of the reeds. Specifically, the two reeds are arranged asymmetrically on the valve body 1, and the included angle between the two reeds is 13°. 0 -15 0 The two reeds are inclined together towards the same side of the top of the valve body 1. In practice, the included angle between the two reeds is chosen to be 14°. 0 One of the tongue springs has a longer and wider cantilever 5 than the other tongue spring. One exhaust port 3 is located inside one of the fixing parts 4 and the other exhaust port 3 is located outside the other fixing part 4. Two through holes 14 of different sizes are opened on the valve plate body 1.

[0025] The inner side of the fixing part 4 extends upward in an arc shape to form a first square groove 15, and the outer side extends upward in an arc shape to form a second square groove 16. The length of the inner side extending upward in each fixing part 4 is greater than the length of the outer side extending upward. The fixing part 4 connected by the long and wide cantilever 5 has a longer length of both the inner and outer sides extending upward than the fixing part 4 connected by the short and narrow cantilever 5.

[0026] The valve body 1 has four identical third round chamfers 17 at its four corners. The third round chamfers 17 transition with the side arc of the valve body 1. Each third round chamfer 17 has a second positioning hole 18. One of the third round chamfers 17 has a second arc protrusion 19 in the middle.

[0027] Finally, the most significant contribution of this invention is the adoption of a double-spring design, with both springs responding synchronously to the suction action, increasing the suction volume by more than 80% compared to a single-spring structure. The gradual width design of the springs ensures smooth airflow and avoids local eddies. The connection between the springs and the fixing part 4 and the cantilever 5 adopts a smooth arc transition, reducing the stress concentration coefficient and avoiding breakage caused by long-term high-frequency vibration. The groove structure of the fixing part 4 disperses local stress, further improving structural stability. Both embodiments are designed with precise positioning holes (first positioning hole 11 and second positioning hole 18), which, together with chamfers, auxiliary protrusions, and notches, reduce installation deviations and ensure precise matching between the valve body 1 and the compressor cylinder and piston.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-spring double-exhaust compressor intake valve, comprising a valve body (1), characterized in that: Two embedded grooves (2) are provided on the valve body (1). A tongue spring is installed in each embedded groove (2). A gas channel is left between the edge of the tongue spring and the inner wall of the embedded groove (2). Two semi-circular concave exhaust holes (3) are provided on the valve body (1). The exhaust holes (3) are located on one side of the connection between the tongue spring and the embedded groove (2) and are connected to the gas channel. The tongue spring includes a fixing part (4), a cantilever (5) and a tongue (6). The fixing part (4) is fixed on the inner wall of the embedded groove (2). The cantilever (5) is fixed between the fixing part (4) and the tongue (6), and the fixing part is a smooth arc transition. The two tongue springs gradually diffuse outward from the two tongues (6) to the two fixing parts (4). The embedded groove (2) on one side of the fixing part (4) is connected to the exhaust hole (3). The two embedded grooves (2) are connected at the close point of the two tongues (6).

2. The suction valve plate of the double-spring double-exhaust compressor according to claim 1, characterized in that: The width of the fixed end increases sequentially from the cantilever (5) toward the inner wall of the embedded groove (2), and the width of the cantilever (5) decreases sequentially from the tongue (6) toward the fixed part (4).

3. The suction valve plate of the double-spring double-exhaust compressor according to claim 2, characterized in that: Two tongue springs are symmetrically arranged on the valve body (1), and the included angle between the two tongue springs is 26°. 0 -30 0 The two tongue springs are the same size, and the two exhaust holes (3) are located inside the two fixing parts (4).

4. The suction valve plate of the double-spring double-exhaust compressor according to claim 3, characterized in that: The fixing part (4) extends upward in an arc shape on the inner side to form a first arc groove (7) and extends upward in an arc shape on the outer side to form a second arc groove (8). The length of the upward extension of the inner side of the fixing part (4) is greater than the length of the upward extension of the outer side, and the second arc groove (8) is greater than the first arc groove (7).

5. The suction valve plate of the double-spring double-exhaust compressor according to claim 4, characterized in that: The valve body (1) has two corners on one side with a first rounded chamfer (9) and two corners on the other side with a second rounded chamfer (10). The second rounded chamfer (10) is larger than the first rounded chamfer (9). The first rounded chamfer (9) and the second rounded chamfer (10) are both connected to the side arc of the valve body (1). Three first positioning holes (11) are provided on the valve body (1). Two of the first positioning holes (11) are located at the first rounded chamfer (9), and the other first positioning hole (11) is located between the two second rounded chamfers (10).

6. The suction valve plate of the double-spring double-exhaust compressor according to claim 5, characterized in that: One of the second round chamfers (10) has a first arc protrusion (12) fixed in the middle, and the other second round chamfer (10) has an arc notch (13) in the middle.

7. The suction valve plate of the double-spring double-exhaust compressor according to claim 2, characterized in that: Two tongue springs are asymmetrically arranged on the valve body (1), and the included angle between the two tongue springs is 13°. 0 -15 0 One of the tongue springs has a longer and wider cantilever (5) than the other tongue spring. One exhaust hole (3) is located inside one of the fixing parts (4) and the other exhaust hole (3) is located outside the other fixing part (4). Two through holes (14) of different sizes are opened on the valve plate body (1).

8. The suction valve plate of the double-spring double-exhaust compressor according to claim 7, characterized in that: The fixing part (4) extends upward in an arc shape on the inner side to form a first square groove (15) and extends upward in an arc shape on the outer side to form a second square groove (16). The length of the upward extension of the inner side of each fixing part (4) is greater than the length of the upward extension of the outer side. The fixing part (4) connected by the long and wide cantilever (5) is longer in both the inner and outer upward extension lengths than the fixing part (4) connected by the short and narrow cantilever (5).

9. The suction valve plate of the double-spring double-exhaust compressor according to claim 8, characterized in that: The valve body (1) has four identical third round chamfers (17) at its four corners. The third round chamfers (17) are connected to the side arc of the valve body (1). Each third round chamfer (17) has a second positioning hole (18). One of the third round chamfers (17) has a second arc protrusion (19) in the middle.

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