CN211116497U - Air suction assembly for piston compressor - Google Patents
Air suction assembly for piston compressor Download PDFInfo
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- CN211116497U CN211116497U CN201921474204.3U CN201921474204U CN211116497U CN 211116497 U CN211116497 U CN 211116497U CN 201921474204 U CN201921474204 U CN 201921474204U CN 211116497 U CN211116497 U CN 211116497U
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Abstract
The utility model discloses an air suction component for a piston compressor, which comprises a cylinder, an air suction valve plate and a valve plate, wherein a cylinder hole is arranged on the cylinder, an elastic cantilever is arranged on the air suction valve plate, an air suction hole is arranged on the valve plate, and the elastic cantilever comprises a sealing area for sealing the air suction hole, a limiting area connected with the air suction valve plate and a flexible arm area for connecting the sealing area and the limiting area; the line shape of the side of the flexible arm region is hyperbolic. The utility model provides a subassembly of breathing in for piston compressor, simple structure can effectively reduce the bending stress that the disturbed arm field received.
Description
Technical Field
The utility model belongs to the technical field of reciprocating piston compressor technique and specifically relates to a subassembly of breathing in for piston compressor is related to.
Background
The suction valve plate of reciprocating piston compressor is a mechanical valveThe valve is determined by the pressure difference on two sides of the valve plate, is a quick-wear part, has the application range of fixed-frequency and variable-frequency compressors, can be further divided into household and commercial compressors on the basis, and has complicated and changeable application occasions and working conditions. The household fixed-frequency and variable-frequency compressor mainly uses an R600a refrigerant at present, the suction pressure is relatively low, the process and the design of a suction valve plate mainly focus on high efficiency and high reliability, and particularly, the efficiency and the reliability of the suction valve plate for the variable-frequency compressor under low rotating speed and high rotating speed need to be comprehensively considered, so that the design difficulty is high; the commercial fixed-frequency and variable-frequency compressor mainly uses R290, -23.3 as the refrigeration working medium at presentoAt the evaporation temperature, the suction pressure is 3.4 times of R600a, the working condition is relatively bad, on some large-displacement commercial compressors (the cylinder diameter and the crankshaft eccentricity are large), the examples that the suction valve plate fails due to the exceeding of the bending stress and the slapping stress are endless, especially the commercial variable frequency compressors, the design of the suction valve plate needs to consider the influence of large displacement, high pressure and high rotating speed, and the requirements on the manufacturability, efficiency and reliability of the suction valve plate are very high. The compressor is because of the discharge capacity wide range, the refrigerant kind is many and applied operating mode is many, and the design of subassembly of breathing in faces a great deal of difficult problem, is the problem that development high efficiency, small-size and frequency conversion compressor need key solution.
Chinese patent application publication No. CN105291048A, published as 03/05/2017, entitled "compressor", and discloses a suction valve plate for a compressor, which includes a square valve plate body, and a suction valve tongue hole and an exhaust hole both connected to the valve plate body, wherein one side edge of the suction valve tongue hole horizontally extends toward the inside of the suction valve tongue hole to form a suction valve tongue, the suction valve tongue includes a rectangular base tongue integrally connected to the edge of the suction valve tongue hole, a front end of the rectangular base tongue horizontally extends forward to form a first transition connection tongue, a front end of the first transition connection tongue horizontally extends forward to form a second transition connection tongue, the second transition connection tongue horizontally extends forward to form a circular tongue, and an unequal gap is formed between the edge of the suction valve tongue and the inner wall of the suction valve tongue hole. However, the suction valve plate in the above patent still has the problem of failure due to the over-standard bending stress and slapping stress.
Disclosure of Invention
The utility model discloses an overcome among the prior art problem that the valve block of breathing in among the subassembly of breathing in because bending stress and the problem that spanking stress exceeds standard and became invalid easily, provide a subassembly of breathing in for piston compressor, simple structure can effectively reduce the bending stress that the disturbed arm domain received.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an air suction assembly for a piston compressor comprises an air cylinder, an air suction valve plate and a valve plate, wherein a cylinder hole is formed in the air cylinder, an elastic cantilever is arranged on the air suction valve plate, an air suction hole is formed in the valve plate, and the elastic cantilever comprises a sealing area for sealing the air suction hole, a limiting area connected with the air suction valve plate, and a flexible arm area for connecting the sealing area and the limiting area; the line shape of the side of the flexible arm region is hyperbolic.
Among the above-mentioned technical scheme, the pressure differential of suction valve block both sides can control its and open and close, and at the in-process of breathing in, when the pressure in the cylinder bore is less than outside pressure, the elastic cantilever takes place to deform, and the sealed effect of sealed area to the suction hole disappears, and the suction hole is opened. In the process that the elastic cantilever is opened to the maximum stroke, the bending stress borne by a flexible arm area of the elastic cantilever is gradually increased, the molded line of the flexible arm area adopts a hyperbolic design to effectively reduce the bending stress borne by the flexible arm area, according to experimental results, when the lift of the elastic cantilever of the air suction valve plate is 2mm, the maximum value of the bending stress borne by the flexible arm area is 443MPa, compared with the existing non-hyperbolic design scheme, the stress can be effectively reduced by about 12%, in addition, the molded line of the flexible arm area adopts the hyperbolic design to enable the regulation and control of the rigidity of the elastic cantilever of the air suction valve plate to be simpler and more feasible, the rigidity of the elastic cantilever of the air suction valve plate is optimized by adjusting the curvature radius of the molded line of the flexible arm area of the air suction valve plate, according to the experimental results, the compressor with the discharge capacity of 7.2cc, the curvature radius of the molded line of the flexible arm area is R62.5mm, the rotation angle of the elastic cantilever crankshaft of the air suction valve plate is closed at about 360 degrees (the piston is initially positioned at the bottom dead center), air suction backflow is reduced, and air suction efficiency is improved. The molded line of the flexible arm area of the air suction valve plate adopts a hyperbolic design, and the flexible arm area of the air suction valve plate has the process advantages of easiness in blanking, easiness in rolling and throwing and the like, the hyperbolic curvature radius is single, the flexible arm area has two parameters of thickness and curvature radius, so that when the elastic cantilever of the air suction valve plate is subjected to blanking manufacture and rolling and throwing process treatment, the blanking and rolling and throwing quality of the flexible arm area of the valve plate can be improved by controlling the process parameters, the quality of the elastic cantilever of the air suction valve plate is improved, and the stress state of the flexible arm area in the opening process of the elastic cantilever of the valve plate is.
Preferably, the line shape of the two side edges of the flexible arm area is a symmetrical hyperbolic shape. The symmetrical hyperbolic shape is convenient to process, can further reduce the bending stress that the disturbed arm region received, reduces the backward flow of breathing in simultaneously, promotes the efficiency of breathing in.
Preferably, the air suction valve plate is provided with an air outlet, and the air outlet is arranged near the flexible arm area. The structure makes the device structure more compact, and inhales with the crisscross distribution of exhaust structure, does not take place to interfere.
Preferably, the number of the flexible arm domains is 2, and two flexible arm domains are connected with the same sealing domain. The air suction components of the single-disturbance arm domain and the double-disturbance arm domain are suitable for different scenes. According to different refrigerating capacity, rotating speed and working conditions, the air suction valve plate in the form of a single disturbance arm domain and a single air suction valve plate sealing domain is suitable for household constant-frequency and variable-frequency compressors; the air suction valve plate in the form of the double-disturbance arm area and the single air suction valve plate sealing area is also suitable for household fixed-frequency and variable-frequency compressors, and the effective flow area is increased due to the increase of the air suction aperture, so that the air suction valve plate is suitable for developing more efficient household compressors; the suction assembly structure provided by the two embodiments is successfully applied by adopting a symmetrical hyperbolic design for the flexible arm domain molded line, the manufacturability, the efficiency and the reliability of the suction valve plate are comprehensively improved, the suction assembly is designed according to the needs according to different application occasions, and the matching performance is strong.
Preferably, an air vent is provided between the two flexible arm regions. The structure that sets up the gas vent between two disturbed arm areas is compacter.
Preferably, the number of the disturbing arm domains is 2, the number of the sealing domains is 2, the disturbing arm domains and the sealing domains are in one-to-one correspondence, and the sealing domains are connected with the corresponding disturbing arm domains; the number of the air suction holes is 2, and the air suction holes correspond to the sealing areas one by one. The suction valve plate in the form of the double-interference arm domain and the sealing domain is suitable for large-displacement commercial fixed-frequency and variable-frequency compressors, the increase of the displacement of the compressor means that a larger flow area is needed, and the double suction holes are beneficial to improving the flow area so as to improve the suction efficiency.
Preferably, when the air suction valve plate is in an air suction state, the sealing area and the flexible arm area are located in the cylinder hole, and the limiting area is in contact with the end face where the cylinder hole is located. The limiting domain can limit and fix the elastic cantilever, and the sealing domain and the disturbing arm domain are simultaneously positioned in the cylinder hole, so that the air inlet efficiency can be increased.
Preferably, the air cylinder further comprises a gasket, and the gasket is arranged between the air cylinder and the air suction valve plate. The gasket can play a sealing role, and meanwhile, the gasket has certain elasticity, so that direct collision between the elastic cantilever and the edge of the cylinder hole when the elastic cantilever deforms can be avoided, the loss of the elastic cantilever is reduced, and the service life of the elastic cantilever is prolonged.
Preferably, the elastic cantilever and the air suction valve plate are of an integrally formed structure. The structure can further increase the integral strength of the elastic cantilever and the air suction valve plate.
The utility model has the advantages that: (1) the bending stress on the flexible arm area is effectively reduced; (2) the regulation and control of the elastic cantilever are simpler and more feasible; (3) the elastic cantilever can reduce air suction backflow and improve air suction efficiency; (4) the molded line of the flexible arm area of the air suction valve plate adopts a hyperbolic design, and has the process advantages of easy punching, easy rolling and throwing and the like: (5) the air suction components of the single-disturbance arm domain and the double-disturbance arm domain comprehensively improve the manufacturability, efficiency and reliability of the air suction valve plate, and the air suction components are designed as required according to different application occasions, so that the matching performance is high.
Drawings
FIG. 1 is an exploded view of the structure of the present invention;
fig. 2 is a schematic structural diagram of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is a schematic view showing a structure of an intake valve sheet in embodiment 2;
FIG. 5 is a schematic view of the structure of the suction valve plate in embodiment 3.
In the figure: the cylinder comprises a cylinder 1, a cylinder hole 1.1, an air suction valve plate 2, an air exhaust port 2.1, an elastic cantilever 3, a sealing area 3.1, a flexible arm area 3.2, a limiting area 3.3, a hyperbolic shape 3.4, a valve plate 4, an air suction hole 4.1 and a gasket 5.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1:
as shown in fig. 1, 2 and 3, an air suction assembly for a piston compressor comprises an air cylinder 1, an air suction valve plate 2, a valve plate 4 and a gasket 5, wherein the air suction valve plate 2 is arranged between the air cylinder 1 and the valve plate 4, and the gasket 5 is arranged between the air cylinder 1 and the air suction valve plate 2; the valve plate 4 is provided with a suction hole 4.1;
the air suction valve plate 2 is provided with an elastic cantilever 3 and an air outlet 2.1, and the elastic cantilever 3 and the air suction valve plate 2 are of an integrally formed structure; the elastic cantilever 3 comprises a sealing area 3.1 for closing the air suction hole 4.1, a limiting area 3.3 connected with the air suction valve plate 2 and a flexible arm area 3.2 for connecting the sealing area 3.1 and the limiting area 3.3, and the linear shape of the side edge of the flexible arm area 3.2 is a symmetrical hyperbolic shape 3.4; the exhaust port 2.1 is arranged in the vicinity of the flexible arm region 3.2
Be equipped with cylinder hole 1.1 on the cylinder 1, when suction valve piece 2 was in the state of breathing in, sealed domain 3.1 and disturbed arm domain 3.2 were in cylinder hole 1.1, and spacing domain 3.3 and the terminal surface contact in cylinder hole 1.1 place.
Among the above-mentioned technical scheme, the pressure differential of 2 both sides of suction valve block can control its and open and close, and at the in-process of breathing in, when the pressure in 1 jar hole 1.1 of cylinder 1 was less than outside pressure, the elastic cantilever 3 took place to deform, and sealed area 3.1 disappears to the sealed effect of suction opening 4.1, and suction opening 4.1 is opened. In the process that the elastic cantilever 3 is opened to the maximum stroke, the bending stress borne by a flexible arm area 3.2 of the elastic cantilever 3 is gradually increased, the bending stress borne by the flexible arm area 3.2 can be effectively reduced by adopting the design of a symmetrical hyperbolic curve 3.4, according to experimental results, when the lift range of the elastic cantilever of the air suction valve plate 2 is 2mm, the maximum value of the bending stress borne by the flexible arm area 3.2 is 443MPa, compared with the existing non-hyperbolic curve design scheme, the stress can be effectively reduced by about 12 percent, in addition, the regulation and control of the rigidity of the elastic cantilever 3 of the air suction valve plate 2 are simpler and more feasible by adopting the symmetrical hyperbolic curve 3.4 as the flexible arm area 3.2, the rigidity of the elastic cantilever of the air suction valve plate 2 is optimized by regulating the curvature radius of the molded line of the flexible arm area 3.2 of the air suction valve plate 2, the compressor with the discharge capacity of 7.2cc is realized according to the experimental results, the curvature radius of the flexible arm area 3.2 of the flexible arm area is R62.5mm, the first-order natural frequency is 293Hz, the crank angle of the elastic cantilever 3 of the air suction valve plate 2 is closed at about 360 degrees (the piston is initially positioned at the bottom dead center), air suction backflow is reduced, and air suction efficiency is improved. The molded line of the flexible arm area 3.2 of the air suction valve plate 2 is designed in a symmetrical hyperbolic shape 3.4, the molded line also has the process advantages of easiness in blanking, easiness in rolling and the like, the curvature radius of the symmetrical hyperbolic shape 3.4 is single, the flexible arm area 3.2 has two parameters of thickness and curvature radius, so that when the elastic cantilever of the air suction valve plate 2 is subjected to blanking manufacture and rolling and throwing process treatment, the blanking and rolling and throwing quality of the flexible arm area 3.2 of the valve plate can be improved by controlling the process parameters, the quality of the elastic cantilever of the air suction valve plate 2 is improved, and the stress state of the flexible arm area 3.2 in the opening process of the elastic cantilever of the valve plate is also improved.
Example 2:
as shown in fig. 4, most of the technical solutions of this embodiment are the same as those of embodiment 1, except that: the number of the disturbing arm areas 3.2 is 2, and the two disturbing arm areas 3.2 are connected with the same sealing area 3.1; an exhaust port 2.1 is provided between the two flexible arm regions 3.2.
According to different refrigerating capacity, rotating speed and working conditions, the air suction valve plate 2 in the form of the single-disturbance-property arm area 3.2 and the single-air-suction valve plate 2 sealing area 3.1 is suitable for household constant-frequency and variable-frequency compressors; the air suction valve plate 2 in the form of the double-interference arm area 3.2 and the single-air suction valve plate 2 sealing area 3.1 is also suitable for household fixed-frequency and variable-frequency compressors, and the effective flow area is increased due to the increase of the diameter of the air suction hole 4.1, so that the air suction valve plate is suitable for developing a more efficient household compressor; the suction assembly structure provided by the two embodiments is successful application of a symmetrical hyperbolic design on the molded line of the flexible arm area 3.2, the manufacturability, the efficiency and the reliability of the suction valve plate 2 are comprehensively improved, the suction assembly is designed according to the requirement according to different application occasions, and the matching performance is high. The arrangement of the exhaust port 2.1 between the two flexible arm regions 3.2 is more compact.
Example 2:
as shown in fig. 5, most of the technical solutions of this embodiment are the same as those of embodiment 1, except that: the number of the disturbing arm domains 3.2 is 2, the number of the sealing domains 3.1 is 2, the disturbing arm domains 3.2 correspond to the sealing domains 3.1 one by one, and the sealing domains 3.1 are connected with the corresponding disturbing arm domains 3.2; the number of the air suction holes 4.1 is 2, and the air suction holes 4.1 correspond to the sealing areas 3.1 one by one.
The air suction valve plate 2 in the form of the double-interference arm area 3.2 and the sealing area 3.1 is suitable for large-displacement commercial fixed-frequency and variable-frequency compressors, the increase of the displacement of the compressor means that a larger flow area is needed, and the double air suction holes 4.1 are beneficial to improving the flow area so as to improve the air suction efficiency.
The utility model has the advantages that: the bending stress on the flexible arm area 3.2 is effectively reduced; the regulation and control of the elastic cantilever 3 are simpler and more feasible; the elastic cantilever 3 can reduce air suction backflow and improve air suction efficiency; the molded line of the flexible arm area 3.2 of the air suction valve plate 2 adopts a hyperbolic design, and the process has the advantages of easy punching, easy rolling and throwing and the like: the air suction components of the single flexible arm area 3.2 and the double flexible arm area 3.2 comprehensively improve the manufacturability, efficiency and reliability of the air suction valve plate 2, and the air suction components are designed as required according to different application occasions, so that the matching performance is high.
Claims (9)
1. An air suction assembly for a piston compressor comprises an air cylinder (1), an air suction valve plate (2) and a valve plate (4), wherein a cylinder hole (1.1) is formed in the air cylinder (1), an elastic cantilever (3) is arranged on the air suction valve plate (2), an air suction hole (4.1) is formed in the valve plate (4), the elastic cantilever (3) comprises a sealing domain (3.1) for sealing the air suction hole (4.1), a limiting domain (3.3) connected with the air suction valve plate (2), and a flexible arm domain (3.2) for connecting the sealing domain (3.1) and the limiting domain (3.3); the line shape of the side of the flexible arm area (3.2) is hyperbolic (3.4).
2. Suction assembly for a piston compressor according to claim 1, characterized in that the line of the two sides of the flexible arm area (3.2) is a symmetrical hyperbolic line (3.4).
3. Suction assembly for a piston compressor according to claim 1, characterized in that the suction valve plate (2) is provided with a discharge opening (2.1), the discharge opening (2.1) being arranged in the vicinity of the flexible arm area (3.2).
4. Suction assembly for a piston compressor according to claim 1, characterized in that the number of said flexible arm zones (3.2) is 2, two flexible arm zones (3.2) being connected to the same sealing zone (3.1).
5. Suction assembly for a piston compressor according to claim 4, characterized in that between the two perturbating arm regions (3.2) there is provided a discharge opening (2.1).
6. Suction assembly for a piston compressor according to claim 1, characterized in that the number of said disturbing arm fields (3.2) is 2, the number of sealing fields (3.1) is 2, the disturbing arm fields (3.2) and the sealing fields (3.1) are in one-to-one correspondence, the sealing fields (3.1) being connected to the corresponding disturbing arm fields (3.2); the number of the air suction holes (4.1) is 2, and the air suction holes (4.1) correspond to the sealing areas (3.1) one by one.
7. Suction assembly for a piston compressor according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that the sealing area (3.1) and the flexible arm area (3.2) are located inside the cylinder bore (1.1) when the suction valve plate (2) is in suction condition, and the limiting area (3.3) is in contact with the end surface of the cylinder bore (1.1).
8. Suction assembly for a piston compressor according to claims 1 or 2 or 3 or 4 or 5 or 6, characterized in that it further comprises a gasket (5), the gasket (5) being arranged between the cylinder (1) and the suction valve plate (2).
9. Suction assembly for a piston compressor according to claims 1 or 2 or 3 or 4 or 5 or 6, characterized in that said elastic cantilever (3) is of an integral structure with the suction valve plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921474204.3U CN211116497U (en) | 2019-09-05 | 2019-09-05 | Air suction assembly for piston compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921474204.3U CN211116497U (en) | 2019-09-05 | 2019-09-05 | Air suction assembly for piston compressor |
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| CN211116497U true CN211116497U (en) | 2020-07-28 |
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| CN201921474204.3U Active CN211116497U (en) | 2019-09-05 | 2019-09-05 | Air suction assembly for piston compressor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112160895A (en) * | 2020-09-15 | 2021-01-01 | 中国科学院上海技术物理研究所 | Double-cantilever type reed valve for linear direct-current piston compressor and design method thereof |
| CN113757077A (en) * | 2021-09-14 | 2021-12-07 | 珠海格力电器股份有限公司 | Reciprocating compressor and refrigerator refrigerating system |
-
2019
- 2019-09-05 CN CN201921474204.3U patent/CN211116497U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112160895A (en) * | 2020-09-15 | 2021-01-01 | 中国科学院上海技术物理研究所 | Double-cantilever type reed valve for linear direct-current piston compressor and design method thereof |
| CN113757077A (en) * | 2021-09-14 | 2021-12-07 | 珠海格力电器股份有限公司 | Reciprocating compressor and refrigerator refrigerating system |
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