Shutdown pressure relief valve plate assembly with integrated suction valve plate and exhaust valve plate

Abstract

The utility model discloses an air suction and exhaust valve plate integrated shutdown pressure relief valve plate assembly which comprises a valve plate, an air suction hole and an exhaust hole are formed in the valve plate in a penetrating mode, an air suction installation groove is formed in the rear side of the valve plate, an air suction valve plate is welded in the air suction installation groove, the air suction valve plate comprises a movable part and a welding part, and the movable part is connected with the welding part. A movable portion of the air suction valve plate corresponds to the position of the air suction hole, an air suction sealing ring used for being matched with the movable portion of the air suction valve plate is arranged in the air suction installation groove, a pressure relief notch structure is arranged on the air suction sealing ring, an exhaust valve plate is arranged on the front side of the valve plate, and a valve tongue portion of the exhaust valve plate corresponds to the position of the exhaust hole. The utility model has the advantages of simple structure, avoidance of shutdown vibration noise and low cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressor valve groups, and in particular relates to a shutdown pressure relief valve plate component with suction and exhaust valve plates integrated. Background Art

[0002] After the compressor has been running on the refrigeration appliance for a period of time, a pressure difference will be generated between the suction and exhaust gases. After shutdown, the crankshaft continues to rotate under the action of inertia. When the inertia force is not enough to discharge the high-pressure gas in the cylinder hole, it will be subjected to the reaction force of the high-pressure gas. Since the gas pressure is not enough to open the suction and exhaust valves, the crankshaft will rebound and swing back and forth, causing the movement to shake and generating shutdown noise and vibration.

[0003] The vibration caused by the movement during shutdown will be transmitted to the compression spring and support block, causing the compression spring to twist and shake. Metal friction may occur between the upper and lower coils of the compression spring with a shorter pitch, resulting in an increase in instantaneous noise. The vibration is transmitted from the compressor to the refrigeration box, causing resonance and abnormal noise on the bottom plate of the box, and there will be a significant increase in short-term vibration. In severe cases, there will be a metallic sound of the movement hitting the limit point of the shell, and it will be judged as a faulty machine.

[0004] The movement shaking at the moment of shutdown increases with the increase of box pressure and increases with the reduction of random movement mass. The problem of increased noise at the moment of shutdown has become a difficult problem in the industry, seriously affecting the product experience.

[0005] In order to meet the needs of different compressor displacements, valve plates are generally designed to be made of powder metallurgy and stainless steel. The stainless steel valve plate is referred to as a steel valve plate in the refrigeration compressor industry.

[0006] The steel valve plate usually has the following structure: Structure 1: the intake valve plate is a separate whole piece, and the exhaust valve plate is a separate whole piece; Structure 2: the exhaust valve plate is limited by riveting a limit plate; Structure 3: the exhaust valve plate is limited by welding and cooperating with the cylinder head, and the intake valve plate is limited by welding and a limit plate.

[0007] Steel valve plate structure 1: The exhaust and intake valve plates are separate pieces, which is costly; structure 2: The riveted form requires a larger cylinder head space, which is not conducive to the miniaturization of the compressor valve group layout, and the production cycle is slow, the cost is high, and the production capacity is limited; structure 3: The exhaust valve plate is welded, the intake valve plate is welded, and the external limit plate is used for position limiting. The limit plate of this structure is prone to misalignment, resulting in damage to the valve tongue. If the intake valve plate limit plate is welded to the valve plate, this problem can be avoided, but it increases the process and cost.

[0008] The problem with the existing technology is that when the compressor stops, the gas in the cylinder cannot be completely discharged, causing the crankshaft to swing back and forth, resulting in movement shaking, shutdown noise and vibration, affecting use; the existing steel valve plate has low production efficiency, complex structural process and high cost. Summary of the invention

[0009] The utility model aims to solve the problems existing in the prior art and provide a shutdown pressure relief valve plate assembly with an integrated suction and exhaust valve plate, which has the advantages of simple structure, avoiding shutdown vibration and noise, and low cost.

[0010] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a shutdown pressure relief valve plate assembly with an integrated suction and exhaust valve plate, including a valve plate, the valve plate is penetrated by a suction hole and an exhaust hole, the rear side of the valve plate is provided with a suction mounting groove, an suction valve plate is welded in the suction mounting groove, the suction valve plate includes a movable part and a welding part, the movable part of the suction valve plate corresponds to the position of the suction hole, an suction sealing ring for cooperating with the movable part of the suction valve plate is arranged in the suction mounting groove, a pressure relief notch structure is arranged on the suction sealing ring, an exhaust valve plate is arranged on the front side of the valve plate, and the valve tongue part of the exhaust valve plate corresponds to the position of the exhaust hole.

[0011] In the above scheme, the suction holes and exhaust holes on the valve group are used for air intake and exhaust during the operation of the compressor. The suction mounting groove on the valve plate is used to connect the limit suction valve plate. The welding part of the suction valve plate is positioned by welding. The structure is simple and the connection is stable. The movable part of the suction valve plate can bend and deform with the airflow to realize the opening and closing of the suction holes. The sealing effect at the contact surface is ensured by the fit between the suction sealing ring and the movable part of the suction valve plate. A pressure relief notch structure is set on the suction sealing ring. When the inertia force of the crankshaft is not enough to discharge the gas in the cylinder from the exhaust valve plate when the compressor is stopped, the internal gas can be discharged, thereby avoiding movement shaking, noise and vibration problems caused by the rebound of the crankshaft when stopped.

[0012] Furthermore, the pressure relief notch structure includes at least one strip-shaped hole groove, and the strip-shaped hole groove is arranged along the radial direction of the air suction sealing ring.

[0013] By opening strip-shaped holes, residual gas in the cylinder can be discharged in time when the machine is shut down, avoiding shutdown noise and vibration problems.

[0014] Furthermore, the outer contour size of the movable part of the air intake valve sheet is larger than the outer contour size of the air intake sealing ring, the strip-shaped hole groove is arranged on the top surface of the air intake sealing ring, and the depth of the strip-shaped hole groove does not exceed 1 mm.

[0015] The outer contour of the active part of the suction valve plate is relatively large to ensure the connection and sealing effect with the contact surface of the suction sealing ring. The depth of the strip hole groove does not exceed 1mm, which reduces the impact on the suction and exhaust efficiency of the compressor.

[0016] Furthermore, the pressure relief notch structure includes an oblique cut arranged at the air intake sealing ring, and the position of the oblique cut corresponds to the end position of the movable part of the air intake valve plate.

[0017] By setting an oblique cut on the suction sealing ring, the residual gas inside can be discharged in time when the compressor is shut down, avoiding vibration and noise when the compressor is shut down. During normal operation, the pressure in the cylinder is relatively high, and the end of the movable part of the suction valve plate is in contact with the oblique cut, and the oblique cut is in a closed state. When the compressor is shut down, as the gas pressure decreases, the movable part of the suction valve plate gradually separates from the oblique cut, facilitating the discharge of gas.

[0018] Furthermore, the exhaust hole penetrates the air intake installation groove, and the air intake valve sheet is provided with an air vent corresponding to the position of the exhaust hole.

[0019] By making the exhaust hole correspond to the position of the air suction installation groove, the valve plate space is saved, and the air suction valve plate is provided with a vent hole to ensure that the exhaust hole is unobstructed, and the size of the vent hole is not less than the size of the exhaust hole.

[0020] Furthermore, the exhaust valve plate comprises a valve tongue portion and a root portion, the root portion of the exhaust valve plate is welded to the valve plate, and the valve plate is provided with an exhaust sealing ring for cooperating with the valve tongue portion of the exhaust valve plate.

[0021] The root of the exhaust valve sheet is fixed by welding, the structure is simple, and the sealing effect during air intake is ensured by the cooperation between the exhaust sealing ring and the valve tongue of the exhaust valve sheet.

[0022] Furthermore, a cylinder cover is detachably provided on the front side of the valve plate, and a clamping portion and a limiting portion are provided on the cylinder cover, wherein the clamping portion corresponds to the root position of the exhaust valve plate, and the limiting portion corresponds to the valve tongue position of the exhaust valve plate.

[0023] The root of the exhaust valve plate is compressed by the compression part of the cylinder head to enhance the positioning effect of the exhaust valve plate, and the deformation angle of the valve tongue of the exhaust valve plate is limited by the limiting part to avoid excessive deformation of the exhaust valve plate and affect the service life.

[0024] Furthermore, a cylinder head gasket is arranged between the cylinder head and the valve plate, a valve tongue groove is opened on the valve plate, and the valve tongue groove is located on the outer ring of the exhaust sealing ring.

[0025] The cylinder head gasket is used to ensure the connection and sealing between the cylinder head and the valve plate. The valve tongue groove is provided to allow the exhaust valve plate to fully contact the exhaust sealing ring to ensure the sealing effect.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] 1. By setting an air intake sealing ring on the valve plate to cooperate with the movable part of the air intake valve plate, and setting a pressure relief notch structure on the air intake sealing ring, the residual gas can be discharged smoothly when the machine is shut down, and the crankshaft can be prevented from swinging back and forth under the action of residual gas pressure, thereby reducing the reaction force of the gas on the movement and solving the corresponding shutdown vibration and noise problems;

[0028] 2. The suction valve plate is welded and fixed by opening a suction installation groove on the valve plate, and the suction valve plate is guided and limited by the side wall of the suction installation groove. No limit plate is required, which reduces the cost, has a simple structure, high production efficiency and low cost;

[0029] 3. By opening the suction installation groove, the suction port and the exhaust port penetrate the suction installation groove, and opening the vent hole on the suction valve plate to ensure the exhaust port works, there is no need to set up a suction valve plate separately, which reduces the valve plate area, saves material costs and valve plate space compared to the whole suction valve plate, and is conducive to the miniaturization design requirements of the compressor;

[0030] 4. By setting the suction sealing ring and the exhaust sealing ring, the valve sheet and the valve plate can maintain a sealing effect on the contact surface, thereby improving the stability of the suction and exhaust operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural exploded view of a shutdown pressure relief valve plate assembly with an integrated suction and exhaust valve plate according to Example 1 of the utility model;

[0032] Figure 2 This is a diagram of the installation structure of the exhaust valve sheet in Example 1 of the utility model;

[0033] Figure 3 This is a structural cross-sectional view of the valve plate in Example 1 of the utility model;

[0034] Figure 4 It is a structural cross-sectional view of the cylinder head in Embodiment 1 of the present utility model;

[0035] Figure 5 It is a structural cross-sectional view of the oblique cut in Example 2 of the utility model;

[0036] In the figure: 1. valve plate; 2. air intake hole; 3. exhaust hole; 4. air intake mounting groove; 5. air intake sealing ring; 6. strip hole groove; 71. movable part; 72. welding part; 81. valve tongue part; 82. root part; 9. oblique cut; 10. vent hole; 11. exhaust sealing ring; 12. cylinder head; 13. clamping part; 14. limiting part; 15. cylinder head gasket; 16. valve tongue groove. DETAILED DESCRIPTION

[0037] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative labor are within the scope of protection of the utility model. In the description of the utility model, it should be noted that the terms front, back, left, right, etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the utility model product is usually placed when used. They are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. Example 1

[0038] like Figure 1-4 As shown, a shutdown pressure relief valve plate 1 assembly with an integrated suction and exhaust valve plate includes a valve plate 1, wherein the valve plate 1 is provided with a suction hole 2 and an exhaust hole 3, and the rear side of the valve plate 1 is provided with a suction mounting groove 4, in which an suction valve plate is welded, and the suction valve plate includes a movable portion 71 and a welding portion 72, and the movable portion 71 of the suction valve plate corresponds to the position of the suction hole 2, and the suction mounting groove 4 is provided with an suction sealing ring 5 for cooperating with the movable portion 71 of the suction valve plate, and a pressure relief notch structure is provided on the suction sealing ring 5, and an exhaust valve plate is provided on the front side of the valve plate 1, and the valve tongue portion 81 of the exhaust valve plate corresponds to the position of the exhaust hole 3.

[0039] In the above scheme, the suction hole 2 and the exhaust hole 3 on the valve group are used for air intake and exhaust during the operation of the compressor. The suction mounting groove 4 on the valve plate 1 is used to connect the limited suction valve plate. The welding portion 72 of the suction valve plate is positioned by welding. The structure is simple and the connection is stable. The movable portion 71 of the suction valve plate can bend and deform with the airflow to realize the opening and closing of the suction hole 2. The suction sealing ring 5 is fitted with the movable portion 71 of the suction valve plate to ensure the sealing effect at the contact surface. The pressure relief notch structure is set on the suction sealing ring 5. When the inertia force of the crankshaft is not enough to discharge the gas in the cylinder from the exhaust valve plate when the compressor is stopped, the internal gas can be discharged, thereby avoiding the movement shaking, noise and vibration problems caused by the rebound of the crankshaft when the compressor is stopped.

[0040] The intake mounting groove 4 corresponds to the contour of the movable part 71 of the intake valve plate, and is directly limited by the valve plate 1. The gap between the two limiting parts does not exceed 0.5mm, and the welding part 72 of the intake valve plate is directly welded in the intake mounting groove 4. The exhaust valve plate is welded to the exhaust side of the valve plate 1, and a support column is designed on the cylinder head 12 to press the root 82 of the exhaust valve plate to prevent the exhaust valve plate welding point from falling off. By designing a pressure relief notch structure on the intake valve line of the valve plate 1, the inertia force of the crankshaft compresses the gas in the cylinder hole when the machine is shut down, so that the gas leaks out from the pressure relief port of the intake valve line of the valve plate 1, thereby reducing the reaction force of the gas on the piston and improving the shutdown vibration and shutdown noise.

[0041] Furthermore, the pressure relief notch structure includes at least one strip-shaped hole groove 6 , and the strip-shaped hole groove 6 is arranged along the radial direction of the air suction sealing ring 5 .

[0042] By providing the strip-shaped hole groove 6, the residual gas in the cylinder can be discharged in time when the machine is shut down, thereby avoiding the problems of shutdown noise and vibration.

[0043] When the compressor is operating normally, the speed reaches 3000 rpm, that is, the exhaust time of each exhaust cycle is less than 0.1 s. Since the exhaust time of each exhaust cycle of the compressor is short, the gas leaking from the pressure relief notch structure during normal operation can be ignored. The cross-sectional size of the strip hole 6 can be set according to the performance, noise and vibration requirements of the compressor.

[0044] Furthermore, the outer contour dimension of the movable portion 71 of the air intake valve plate is larger than the outer contour dimension of the air intake sealing ring 5 , the strip-shaped hole groove 6 is provided on the top surface of the air intake sealing ring 5 , and the depth of the strip-shaped hole groove 6 does not exceed 1 mm.

[0045] The outer contour size of the active part 71 of the air intake valve plate is relatively large, which ensures the connection and sealing effect with the contact surface of the air intake sealing ring 5. The depth of the strip hole groove 6 does not exceed 1 mm, which reduces the impact on the air intake and exhaust efficiency of the compressor.

[0046] The height of the air-intake sealing ring 5 does not exceed 1 mm. During normal exhaust, the outer edge of the movable portion 71 of the air-intake valve plate can seal the strip-shaped hole groove 6 under pressure to reduce air leakage from the strip-shaped hole groove 6 and ensure the compressor's exhaust efficiency. The outer contour size of the movable portion 71 can be adjusted according to the depth of the strip-shaped hole groove 6.

[0047] Furthermore, the exhaust hole 3 penetrates the air intake installation groove 4 , and the air intake valve sheet is provided with an air vent 10 corresponding to the position of the exhaust hole 3 .

[0048] By making the exhaust hole 3 correspond to the position of the air intake mounting groove 4, the space of the valve plate 1 is saved, and the air intake valve plate is provided with an air vent 10 to ensure that the exhaust hole 3 is unobstructed, and the size of the air vent 10 is not less than the size of the exhaust hole 3.

[0049] Furthermore, the exhaust valve plate comprises a valve tongue portion 81 and a root portion 82, the root portion 82 of the exhaust valve plate is welded to the valve plate 1, and the valve plate 1 is provided with an exhaust sealing ring 11 for cooperating with the valve tongue portion 81 of the exhaust valve plate.

[0050] The root 82 of the exhaust valve plate is fixed by welding, and the structure is simple. The exhaust sealing ring 11 cooperates with the valve tongue 81 of the exhaust valve plate to ensure the sealing effect during air intake.

[0051] The exhaust valve sheet is welded to the stainless steel valve plate 1 by spot welding, which reduces the difficulty of the internal space layout of the cylinder head 12.

[0052] Furthermore, a cylinder cover 12 is detachably provided on the front side of the valve plate 1, and a clamping portion 13 and a limiting portion 14 are provided on the cylinder cover 12. The clamping portion 13 corresponds to the position of the root portion 82 of the exhaust valve plate, and the limiting portion 14 corresponds to the position of the valve tongue portion 81 of the exhaust valve plate.

[0053] The clamping portion 13 of the cylinder head 12 is used to clamp the root 82 of the exhaust valve plate to enhance the positioning effect of the exhaust valve plate, and the limiting portion 14 is used to limit the deformation angle of the exhaust valve tongue 81 to avoid excessive deformation of the exhaust valve plate and affect the service life.

[0054] Screw mounting holes are correspondingly provided on the cylinder head 12 and the valve plate 1, and relative positioning is performed by screws. The limiting portion 14 includes an arc surface structure or an inclined plane structure. The pressing portion 13 and the limiting portion 14 are column structures. The pressing column inside the cylinder head 12 presses the welded exhaust valve plate again to ensure that the exhaust valve plate does not fall off. By adjusting the size of the pressing surface and the height of the limiting portion 14, the opening degree of the exhaust valve plate is limited to ensure the reliability of the exhaust valve plate.

[0055] Furthermore, a cylinder head gasket 15 is provided between the cylinder head 12 and the valve plate 1 , and a valve tongue groove 16 is provided on the valve plate 1 , and the valve tongue groove 16 is located on the outer ring of the exhaust sealing ring 11 .

[0056] The connection seal between the cylinder head 12 and the valve plate 1 is ensured by the cylinder head gasket 15, and the exhaust valve plate and the exhaust sealing ring 11 are fully contacted by the valve tongue groove 16 to ensure the sealing effect. Example 2

[0057] like Figure 5 As shown, a shutdown pressure relief valve plate assembly with an integrated suction and exhaust valve plate in this embodiment is further modified as follows on the basis of Embodiment 1:

[0058] Furthermore, the pressure relief notch structure includes an oblique cut 9 provided at the air intake sealing ring 5 , and the position of the oblique cut 9 corresponds to the end position of the active portion 71 of the air intake valve plate.

[0059] By setting the bevel cut 9 on the air intake sealing ring 5, the residual gas inside can be discharged in time when the machine is shut down, so as to avoid vibration and noise when the compressor is shut down. During normal operation, the pressure in the cylinder is relatively large, and the end of the active part 71 of the air intake valve plate is in contact with the bevel cut 9, and the bevel cut 9 is in a closed state. When the machine is shut down, as the gas pressure decreases, the active part 71 of the air intake valve plate is gradually separated from the bevel cut 9, so as to facilitate the discharge of gas.

[0060] The strip-shaped hole groove 6 is replaced by an oblique cut 9 .

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shut-down pressure relief valve plate assembly with an integrated suction and exhaust valve plate, characterized in that: It includes a valve plate, which is penetrated by an air intake hole and an air exhaust hole, a rear side of the valve plate is provided with an air intake mounting groove, an air intake valve plate is welded in the air intake mounting groove, the air intake valve plate includes a movable part and a welding part, the movable part of the air intake valve plate corresponds to the position of the air intake hole, an air intake sealing ring for cooperating with the movable part of the air intake valve plate is arranged in the air intake mounting groove, a pressure relief notch structure is arranged on the air intake sealing ring, an air exhaust valve plate is arranged on the front side of the valve plate, and the valve tongue part of the air exhaust valve plate corresponds to the position of the air exhaust hole.

2. The shut-down pressure relief valve plate assembly with integrated suction and exhaust valve plates according to claim 1 is characterized in that: The pressure relief notch structure comprises at least one strip-shaped hole groove, and the strip-shaped hole groove is arranged along the radial direction of the air suction sealing ring.

3. The shut-down pressure relief valve plate assembly with integrated suction and exhaust valve plates according to claim 2 is characterized in that: The outer contour size of the movable part of the air intake valve sheet is larger than the outer contour size of the air intake sealing ring, the strip-shaped hole groove is arranged on the top surface of the air intake sealing ring, and the depth of the strip-shaped hole groove does not exceed 1 mm.

4. The shut-down pressure relief valve plate assembly with integrated suction and exhaust valve plates according to claim 1, characterized in that: The pressure relief notch structure comprises an oblique cut arranged at the air intake sealing ring, and the position of the oblique cut corresponds to the end position of the movable part of the air intake valve plate.

5. The shut-down pressure relief valve plate assembly with integrated suction and exhaust valve plates according to claim 1, characterized in that: The exhaust hole penetrates the air intake installation groove, and the air intake valve sheet is provided with an air vent corresponding to the position of the exhaust hole.

6. The shut-down pressure relief valve plate assembly with integrated suction and exhaust valve plates according to claim 1, characterized in that: The exhaust valve sheet comprises a valve tongue portion and a root portion. The root portion of the exhaust valve sheet is welded to a valve plate. An exhaust sealing ring for cooperating with the valve tongue portion of the exhaust valve sheet is arranged on the valve plate.

7. The shut-down pressure relief valve plate assembly with integrated suction and exhaust valve plates according to claim 6, characterized in that: A cylinder cover is detachably provided on the front side of the valve plate, and a pressing portion and a limiting portion are provided on the cylinder cover. The pressing portion corresponds to the root position of the exhaust valve plate, and the limiting portion corresponds to the valve tongue position of the exhaust valve plate.

8. The shut-down pressure relief valve plate assembly with integrated suction and exhaust valve plates according to claim 7, characterized in that: A cylinder head gasket is arranged between the cylinder head and the valve plate. A valve tongue groove is provided on the valve plate. The valve tongue groove is located on the outer ring of the exhaust sealing ring.

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