Static disc anti-falling structure and scroll compressor

Abstract

The utility model discloses a static disc anti-falling structure and a scroll compressor, belongs to the technical field of compressors, and aims to solve the problem that a sealing strip of an existing static disc has the risk of breakage and falling. According to the key points of the technical scheme, the sealing structure comprises a static disc and a movable disc, a first sealing groove is formed in the end, away from a first base plate, of a static disc molded line, a first sealing strip is arranged in the first sealing groove, a second sealing groove is formed in the end, away from a second base plate, of a movable disc molded line, a second sealing strip is arranged in the second sealing groove, and the first sealing groove extends in the direction of the static disc molded line; a first floating space is reserved between the first sealing strip and the bottom wall of the first sealing groove, the width of at least part of the first sealing groove is smaller than that of the first sealing strip, after the static disc is installed in place, the first sealing strip is reliably limited and prevented from falling off from the first sealing groove, the sealing reliability is improved, and the service life of the static disc is prolonged. In addition, the risk that the first sealing strip is broken off is reduced, and abnormal noise generated in the compression cavity due to the fact that the first sealing strip falls off is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and more specifically to a stator disc anti-slip structure and a scroll compressor. Background Art

[0002] Scroll compressors are widely used in places where compressed air is needed in many fields such as industry, agriculture, transportation, etc. due to their high efficiency, low noise, compact size, and contribution to energy saving and environmental protection. The core operating part of the scroll compressor is the scroll, which includes a moving disk and a stationary disk. They work by meshing rather than contact friction, thus avoiding wear and tear, making their service life longer than traditional piston and screw compressors, making them an ideal power source in pneumatic machinery.

[0003] In a scroll compressor, scroll profiles are provided inside the moving plate and the stationary plate, and a compression chamber is formed by the moving plate and the stationary plate cooperating with each other. When the moving plate moves along a specific circular trajectory driven by the crankshaft, the relative position between the moving plate profile and the stationary plate profile changes, causing the compression chamber to move and change its volume, thereby performing suction, compression, and discharge to complete the process of compressing air. In order to ensure the sealing of the moving plate and the stationary plate during operation, sealing grooves are respectively provided on the lower surface of the stationary plate profile and the upper surface of the moving plate profile, and sealing strips that can float in the sealing grooves are installed.

[0004] However, the current sealing groove usually adopts a rectangular cross-section design, which makes the sealing strip easy to fall off and there is a risk of breaking and falling into the compression chamber, which not only destroys the sealing between the moving plate and the static plate and reduces the compression efficiency, but also if the sealing strip breaks and falls into the compression chamber, it will also generate additional noise and cause damage to the static plate or moving plate of the compressor. Therefore, it is necessary to propose a new solution to solve the problem that the sealing strip of the existing static plate is at risk of breaking and falling off. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a stator disc anti-detachment structure and a scroll compressor, so as to reduce the risk of the first sealing strips of the moving disc and the stator disc breaking and falling off through the structural setting.

[0006] The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a static disc anti-detachment structure, including a static disc and a dynamic disc, the static disc including a first substrate and a static disc profile fixedly connected to the first substrate, a first sealing groove is provided at one end of the static disc profile away from the first substrate, a first sealing strip is arranged in the first sealing groove, the dynamic disc includes a second substrate and a dynamic disc profile fixedly connected to the second substrate, a second sealing groove is provided at one end of the dynamic disc profile away from the second substrate, a second sealing strip is arranged in the second sealing groove, the first sealing groove extends along the direction of the static disc profile, a first floating space is reserved between the first sealing strip and the bottom wall of the first sealing groove, at least part of the width of the first sealing groove is smaller than the width of the first sealing strip, when the compressor is running, the first sealing strip at least partially protrudes out of the first sealing groove, and the second sealing strip at least partially protrudes out of the second sealing groove.

[0007] The utility model is further configured as follows: the cross section of the first sealing groove and / or the second sealing groove is at least partially in an inverted trapezoidal shape.

[0008] The utility model is further configured as follows: the first sealing groove and / or the second sealing groove is configured as an inverted trapezoid or a combination of an inverted trapezoid and a rectangle, and the rectangular portion is located inside the first sealing groove and / or the second sealing groove.

[0009] The utility model is further configured as follows: the static disk and the dynamic disk form an air inlet cavity, a compression cavity and an air outlet cavity, and when the dynamic disk moves horizontally, the pressure of the air inlet cavity is less than the pressure of the compression cavity and the air outlet cavity.

[0010] The utility model is further configured as follows: an incision groove is provided on the static disk profile or at a position of the static disk profile close to the air inlet cavity, and the first sealing groove is communicated with the incision groove.

[0011] The utility model is further configured as follows: the width of the cut-in groove is greater than or equal to the maximum width of the first sealing groove.

[0012] The utility model also discloses a scroll compressor, comprising any one of the above-mentioned stator disc anti-slip structures.

[0013] The utility model is further configured as follows: a second floating space is reserved between the second sealing strip and the bottom wall of the second sealing groove, the width of at least part of the second sealing groove is smaller than the width of the second sealing strip, and when the moving disk rotates, the second sealing strip generates an axial force on the inner wall of the moving disk to make the second sealing strip protrude from the second sealing groove.

[0014] In summary, the utility model has the following beneficial effects:

[0015] The anti-detachment structure of the static disk is simple, and can effectively improve the stability and reliability of the scroll compressor during operation. The cross-section of the first sealing groove is set to an inverted trapezoid or a combination of an inverted trapezoid and a rectangle, so that the first sealing strip generates an axial force on the inner wall of the moving disk, and the second sealing strip generates an axial force on the inner wall of the static disk, thereby ensuring the sealing effect between the moving disk and the static disk, and a first floating space is left between the first sealing strip and the bottom wall of the first sealing groove. After the static disk is installed in place, the first sealing strip can be more reliably limited, and the first sealing strip can be effectively prevented from falling off from the first sealing groove, which not only improves the sealing reliability, but also reduces the risk of the first sealing strip breaking. Further, abnormal noise generated in the compression chamber due to the falling off of the first sealing strip is avoided, thereby improving the stability and reliability of the compressor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the utility model;

[0017] Figure 2 A schematic diagram of the structure with the first sealing strip removed from the static disk;

[0018] Figure 3 It is a cross-sectional view of the moving plate and the stationary plate when the scroll compressor is installed in a seated manner;

[0019] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0020] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0021] In the figure: 11, first substrate; 12, static disk profile; 21, second substrate; 22, dynamic disk profile; 31, first sealing groove; 32, first sealing strip; 41, second sealing groove; 42, second sealing strip; 5, first floating space; 6, air inlet cavity; 7, compression cavity; 8, air outlet cavity; 9, cutting groove; 10, second floating space. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0023] Example:

[0024] like Figure 1 and Figure 4As shown, the static disc anti-slip structure is used for a scroll compressor, including a static disc and a dynamic disc, the static disc including a circular first substrate 11 and a vortex-shaped static disc profile 12 integrally formed with the first substrate 11, a first sealing groove 31 is provided at one end of the static disc profile 12 away from the first substrate 11, the first sealing groove 31 extends in the direction of the static disc profile 12, a first floating sealing strip 32 is installed in the first sealing groove 31, the dynamic disc including a second substrate 21 and a vortex-shaped dynamic disc profile 22 integrally formed with the second substrate 21, a second sealing groove 41 is provided at one end of the dynamic disc profile 22 away from the second substrate 21, a second sealing groove 41 is provided in a second sealing strip 42, the second sealing groove 41 extends in the direction of the dynamic disc profile 22, the first sealing strip 32 and the second sealing strip 42 are made of polyphenylene sulfide (PPS) or polytetrafluoroethylene (PTFE), polyphenylene sulfide has good thermal stability, high mechanical strength and hardness, excellent flame retardancy and electrical insulation, polytetrafluoroethylene ... It has high corrosion resistance, high temperature resistance, low friction coefficient and excellent dimensional stability. Polyphenylene sulfide and polytetrafluoroethylene as the materials of the first sealing strip 32 can maintain stable sealing performance, ensure the long-term stable operation of the scroll compressor, and reduce maintenance costs. A first floating space 5 is left between the first sealing strip 32 and the bottom wall of the first sealing groove 31. The width of at least part of the first sealing groove 31 is smaller than the width of the first sealing strip 32. The inner wall of the first sealing groove 31 limits the first sealing strip 32 from sliding out of the first sealing groove 31, thereby preventing the first sealing strip 32 from falling off. When the moving disk rotates, the closed volume formed by the moving disk and the static disk changes continuously, and the gas force generated drives the first sealing strip 32 to partially detach from the first sealing groove 31 and the second sealing strip 42 to partially protrude from the second sealing groove 41, so that the first sealing strip 32 generates an axial force on the inner wall of the moving disk, and the second sealing strip 42 generates an axial force on the inner wall of the static disk, thereby ensuring the sealing effect between the moving disk and the static disk.

[0025] like Figure 2-Figure 4As shown, a first floating space 5 is reserved between the first sealing strip 32 and the bottom wall of the first sealing groove 31, which can provide pressure circulation and ensure that sufficient high-pressure gas enters under the first sealing strip 32, providing sufficient buoyancy for the first sealing strip 32 to float and fit the inner wall of the moving plate, and also allowing the first sealing strip 32 to have a certain amount of room for movement in the depth direction of the first sealing groove 31, which helps the first sealing strip 32 to self-adjust its position when subjected to axial force, thereby better fitting the inner wall of the moving plate and enhancing the sealing between the moving plate and the stationary plate. During the operation of the scroll compressor, the relative movement between the moving plate and the stationary plate may cause a slight movement of the first sealing strip 32, and the first floating space 5 is for this. The tiny movement provides a buffer, reducing the direct friction between the first sealing strip 32 and the bottom wall of the first sealing groove 31, thereby reducing wear. The compressor also generates heat during operation, which may cause the first sealing strip 32 to expand due to heat for a long time. The existence of the first floating space 5 allows the first sealing strip 32 to freely expand and contract within a certain range, thereby improving the sealing performance and working stability of the scroll compressor. On the other hand, the floating setting can ensure the sealing between the moving plate and the stationary plate when the first sealing strip 32 is worn. When the scroll compressor is installed in a seat-type manner, a second floating space 10 is left between the second sealing strip 42 and the bottom wall of the second sealing groove 41, further improving the sealing between the stationary plate and the moving plate.

[0026] like Figure 1-Figure 4 As shown, the cross-section of the first sealing groove 31 and / or the second sealing groove 41 is at least partially an inverted trapezoid. The first sealing groove 31 and / or the second sealing groove 41 can be set to an inverted trapezoid or a combination of an inverted trapezoid and a rectangle, and the rectangular part is located on the inner side of the first sealing groove 31 and / or the second sealing groove 41, so that the width of part of the first sealing groove 31 is smaller than the width of the first sealing strip 32, and the width of part of the second sealing groove 41 is smaller than the width of the second sealing strip 42. The inner side wall of the first sealing groove 31 generates a force on the first sealing strip 32 along the width direction of the first sealing groove 31. After the stator disk or the moving disk is installed in place, the first sealing strip 32 can be limited to prevent the first sealing strip 32 from vibrating during the operation of the scroll compressor. The first sealing strip 32 is not easy to fall off from the stator plate, thereby reducing leakage and maintenance requirements caused by poor sealing, thereby extending the maintenance cycle of the scroll compressor, helping to extend the service life of the scroll compressor, and avoiding additional noise in the compression chamber 7 due to the rupture of the first sealing strip 32, reducing the risk of damage to the stator plate or the moving plate. Good sealing performance can reduce unstable airflow caused by leakage, thereby reducing the vibration of the compressor during operation, further reducing the probability of abnormal noise in the compression chamber 7, and improving the stability and reliability of the scroll compressor operation.

[0027] like Figure 1-Figure 4 As shown, an air inlet chamber 6, a compression chamber 7 and an air outlet chamber 8 are formed between the static disk and the dynamic disk according to the direction of the vortex. When the dynamic disk is driven by the crankshaft to move along a certain circular trajectory, the dynamic disk moves relative to the static disk, and the pressure of the air inlet chamber 6 is less than the pressure of the compression chamber 7 and the air outlet chamber 8. A rectangular cut-in groove 9 is opened at a position of the static disk profile 12 close to the air inlet chamber 6, and the first sealing groove 31 is connected to the cut-in groove 9. The width of the cut-in groove 9 is greater than or equal to the maximum width of the first sealing groove 31, which is convenient for processing the first sealing groove 31 on the end of the static disk profile 12 away from the first substrate 11 1. The operations during processing and maintenance are relatively simple, which reduces the difficulty and cost of manufacturing and maintenance. When processing the first sealing groove 31, a rectangular cutting groove 9 is first opened at a position of the static disk profile 12 close to the air inlet chamber 6, and then a trapezoidal tool is used to process the first sealing groove 31 on both sides of the extension direction of the static disk profile 12. The cutting groove 9 is arranged at a position close to the air inlet chamber 6, that is, in a chamber with the lowest pressure, which can reduce the risk of local damage to the static disk profile 12 at the first sealing groove 31 due to excessive pressure, and improve the stability and reliability of the operation of the scroll compressor.

[0028] like Figure 1-Figure 4 As shown, the sealing between the moving disk and the stationary disk and the durability of the first sealing strip 32 and the second sealing strip 42 are improved through the structural setting. Good sealing performance can reduce energy loss in the compression process, improve the thermal efficiency of the scroll compressor, and produce higher compressed gas output under the same energy consumption. It can reduce the noise caused by gas leakage, and the sealing effect is optimized by the first floating space 5 and the second floating space 10, which indirectly reduces the noise level of the scroll compressor during operation.

[0029] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A static disk anti-slip structure, comprising a static disk and a dynamic disk, wherein the static disk comprises a first substrate (11) and a static disk profile (12) fixedly connected to the first substrate (11), a first sealing groove (31) is provided at one end of the static disk profile (12) away from the first substrate (11), a first sealing strip (32) is provided in the first sealing groove (31), and the dynamic disk comprises a second substrate (21) and a dynamic disk profile (22) fixedly connected to the second substrate (21), a second sealing groove (41) is provided at one end of the dynamic disk profile (22) away from the second substrate (21), a second sealing strip (42) is provided in the second sealing groove (41), and the characteristics are: The first sealing groove (31) extends along the direction of the stator profile (12), and a first floating space (5) is reserved between the first sealing strip (32) and the bottom wall of the first sealing groove (31). The width of at least part of the first sealing groove (31) is smaller than the width of the first sealing strip (32). When the compressor is running, the first sealing strip (32) at least partially protrudes from the first sealing groove (31), and the second sealing strip (42) at least partially protrudes from the second sealing groove (41).

2. The static disc anti-slip structure according to claim 1 is characterized in that: The cross section of the first sealing groove (31) and / or the second sealing groove (41) is at least partially in the shape of an inverted trapezoid.

3. The static disc anti-slip structure according to claim 2 is characterized in that: The first sealing groove (31) and / or the second sealing groove (41) are configured as an inverted trapezoid or a combination of an inverted trapezoid and a rectangle, and the rectangular portion is located inside the first sealing groove (31) and / or the second sealing groove (41).

4. The static disc anti-slip structure according to claim 2 is characterized in that: The stationary disk and the moving disk form an air inlet chamber (6), a compression chamber (7) and an air outlet chamber (8). When the moving disk moves horizontally, the pressure of the air inlet chamber (6) is lower than the pressure of the compression chamber (7) and the air outlet chamber (8).

5. The static disc anti-slip structure according to claim 4 is characterized in that: The static disk profile (12) or a position of the static disk profile (12) close to the air inlet cavity (6) is provided with an incision groove (9), and the first sealing groove (31) is connected to the incision groove (9).

6. The static disc anti-slip structure according to claim 5, characterized in that: The width of the cut-in groove (9) is greater than or equal to the maximum width of the first sealing groove (31).

7. A scroll compressor, characterized in that: It comprises the static disc anti-slip structure as described in any one of claims 1-6.

8. The scroll compressor according to claim 7, characterized in that: A second floating space (10) is reserved between the second sealing strip (42) and the bottom wall of the second sealing groove (41); the width of at least part of the second sealing groove (41) is smaller than the width of the second sealing strip (42); when the moving disc rotates, the second sealing strip (42) generates an axial force on the inner wall of the moving disc so that the second sealing strip (42) protrudes out of the second sealing groove (41).

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