Liquid impact prevention structure and scroll compressor

Abstract

The utility model discloses a liquid impact prevention structure and a scroll compressor, belongs to the technical field of compressors, and aims to solve the problem that a liquid impact risk exists in a compression cavity between a movable disc and a static disc. According to the technical scheme, the liquid impact prevention structure is characterized by comprising a rotating shaft and a fan-shaped balancing weight movably connected with the outer surface of the rotating shaft in a clamped mode, the fan-shaped balancing weight is movably connected with a movable disc, a static disc is movably installed on the outer side of the movable disc, a compression space is formed between the static disc and the movable disc, and the fan-shaped balancing weight can slide relative to the static disc along with the movable disc. At the moment, a pressure relief space is formed between the static disc and the movable disc, when the pressure in the compression cavity is too large and the movable disc and the static disc are pushed to be separated, the mounting part can slide in a reciprocating mode in the length direction of the clamping groove, pressure relief of the compression cavity is achieved, the probability of liquid impact is further reduced, and parts in the compressor are effectively protected; the operation stability, reliability and service life of the compressor are improved, and efficient and safe operation of a refrigerating system is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to compressor technical field more specifically, relate to anti -liquid strike structure and scroll compressor. BACKGROUND

[0002] Compressor as a kind of fluid machinery, its main function is to convert low-temperature low-pressure gas into high-temperature high-pressure gas, and be praised as the "heart" of refrigeration system. Among numerous types of compressors, scroll compressor is most common due to its unique design and wide application.

[0003] Scroll compressor is composed of a fixed involute scroll disc and an involute scroll disc that is eccentric and revolves in a plane, which can compress the volume of the compressor. Specifically, scroll compressor realizes its function through the close meshing of the dynamic and static scroll discs of two double-function equation curves.

[0004] When scroll compressor is used in low-temperature environment, the refrigerant is in liquid state, and the liquid medium has the characteristic of being incompressible. Therefore, if the compressor operates at high speed in this case, the pressure in the compression area will rise rapidly, and the sharp change in pressure may cause liquid strike phenomenon, which mainly occurs inside the compressor. When the refrigerant liquid is sucked into the compressor, the liquid will impact the dynamic and static disc curves, causing the curves to break, which may lead to the risk of compressor failure.

[0005] In the Chinese utility model patent with application number CN202322005289.3, a compressor with dynamic and static disc protection function is disclosed, which includes a housing, a rotating shaft movably installed inside the housing, a fan-shaped counterweight movably connected to the outer surface of the rotating shaft, a fan-shaped dispersing plate fixedly installed on the outer surface of the fan-shaped counterweight, and a liquid discharge hole provided on the surface of the fan-shaped counterweight near the center of the fan-shaped dispersing plate. Through the cooperation of the fan-shaped counterweight and the fan-shaped dispersing plate, the rotating shaft can drive the fan-shaped counterweight to rotate, which in turn drives the fan-shaped dispersing plate to rotate, dispersing the refrigerant liquid at the position of the fan-shaped counterweight and preventing it from being sucked into the interior of the dynamic and static discs in liquid form, thereby significantly reducing the risk of liquid strike on the dynamic and static discs and increasing the reliability of the device during ultra-low temperature operation.

[0006] However, the above-mentioned solution cannot completely avoid the entry of liquid into the compression cavity between the dynamic and static discs, and therefore there is still a risk of liquid strike. Therefore, a new solution is needed to solve the problem of liquid strike risk in the compression cavity between the dynamic and static discs. UTILITY MODEL CONTENT

[0007] In view of the deficiencies of the prior art, the purpose of the utility model is to provide an anti-liquid strike structure and scroll compressor, which reduces the risk of liquid strike in the compression cavity between the dynamic and static discs through the structure.

[0008] The above technical purpose of the utility model is realized through the following technical scheme: the anti-liquid-impact structure comprises:

[0009] The rotating shaft is connected with the fan-shaped counterweight block through the installation portion.

[0010] The fan-shaped counterweight block is movably connected with the driving disc, the outer side of the driving disc is movably installed with a driven disc, a compression space is formed between the driving disc and the driven disc, the fan-shaped counterweight block can slide relative to the driven disc along with the driving disc, and at this time, a pressure relief space is formed between the driving disc and the driven disc.

[0011] The utility model is further provided with: one end of the rotating shaft is fixedly connected with an installation portion, and the fan-shaped counterweight block is movably connected on the outer periphery of the installation portion.

[0012] The utility model is further provided with: the outer surface of the fan-shaped counterweight block is fixedly connected with a fan-shaped dispersing plate.

[0013] The utility model is further provided with: the installation portion is provided with a clamping groove at one end close to the rotating shaft, the two ends of the clamping groove in the length direction are the same in shape with the two ends of the installation portion in the length direction, and the length of the clamping groove is greater than the length of the installation portion.

[0014] The utility model is further provided with: the clamping groove is in the structure of a waist-shaped hole.

[0015] The utility model is further provided with: the two ends of the clamping groove in the length direction are in the structure of a semicircle or an arc.

[0016] The utility model further discloses a scroll compressor comprising the anti-liquid-impact structure, a shell, the rotating shaft is detachably connected inside the shell, and the outer surface of the driven disc is rigidly connected with the inner wall of the shell.

[0017] In conclusion, the utility model has the following beneficial effects:

[0018] The anti-liquid-impact structure utilizes the installation portion to drive the fan-shaped dispersing plate on the fan-shaped counterweight block to rotate, disperses the refrigerant liquid, prevents the refrigerant liquid from being sucked into the driving disc and the driven disc in the form of liquid, and further greatly reduces the risk of liquid impact on the driving disc and the driven disc. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1It is a schematic view of the position connection structure of the fan-shaped counterweight, the mounting part and the rotating shaft.

[0020] Figure 2 It is a schematic view of the position connection structure of the rotating shaft, the fan-shaped counterweight and the moving disc.

[0021] Figure 3 It is a schematic view of the structure of the moving disc and the stationary disc in the normal working state.

[0022] Figure 4 It is a schematic view of the structure of the moving disc and the stationary disc in the pressure relief state.

[0023] Figure 5 It is a sectional view of the scroll compressor.

[0024] In the figure: 1, rotating shaft; 2, fan-shaped counterweight; 3, moving disc; 4, stationary disc; 5, mounting part; 6, fan-shaped dispersing plate; 7, clamping groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Embodiment 1:

[0027] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the liquid-impact-preventing structure comprises a rotating shaft 1 and a fan-shaped counterweight 2 movably connected with the outer surface of the rotating shaft 1. The rotating shaft 1 serves as the core rotating component of the entire liquid-impact-preventing structure, provides rotating support and power transmission for the fan-shaped counterweight 2 and other related components, and ensures that the entire structure can stably rotate the fan-shaped counterweight 2 in a predetermined manner. The fan-shaped counterweight 2 is movably connected with the moving disc 3. The outer side of the moving disc 3 is movably mounted with the stationary disc 4. The compression space is formed between the stationary disc 4 and the moving disc 3. When the compression space is in a high-pressure state, the fan-shaped counterweight 2 can slide relative to the stationary disc 4 together with the moving disc 3. At this time, the pressure relief space is formed between the stationary disc 4 and the moving disc 3. When the compression space is in a high-pressure state, the fan-shaped counterweight 2 can slide relative to the stationary disc 4 together with the moving disc 3, so as to realize the pressure adjustment and pressure relief functions.

[0028] As shown in Figure 1 and Figure 2As shown, one end of the rotating shaft 1 is integrally formed with a mounting portion 5, and the counterweight portion is provided with a clamping groove 7 near one end of the rotating shaft 1. The fan-shaped counterweight block 2 is movably clamped on the outer periphery of the mounting portion 5 through the clamping groove 7. The mounting portion 5 provides a stable mounting base for the fan-shaped counterweight block 2, ensuring that the fan-shaped counterweight block 2 can accurately cooperate with the rotating shaft 1 and normally play a role. The two ends of the clamping groove 7 in the length direction are the same shape as the two ends of the mounting portion 5 in the length direction. The length of the clamping groove 7 is greater than the length of the mounting portion 5. In at least one embodiment, the clamping groove 7 is in the shape of a waist-shaped hole structure. The two ends of the clamping groove 7 in the length direction are in the shape of a semicircle or an arc. The clamping groove 7 cooperates with the mounting portion 5 to limit the movement range of the fan-shaped counterweight block 2, ensuring that it slides within the normal working range, making the movement of the fan-shaped counterweight block 2 on the mounting portion 5 more stable and reliable, and also facilitating the installation and disassembly of the fan-shaped counterweight block 2.

[0029] As shown in Figure 1 and Figure 2 The outer surface of the fan-shaped counterweight block 2 is provided with a fan-shaped dispersing plate 6. The fan-shaped counterweight block 2 is driven to rotate by the rotating shaft 1, thereby driving the fan-shaped dispersing plate 6 to rotate, dispersing the refrigerant liquid at the position of the fan-shaped counterweight block 2, preventing it from being sucked into the interior of the dynamic disc 3 and the static disc 4 in the form of liquid, and thereby greatly reducing the risk of liquid impact on the dynamic disc 3 and the static disc 4, and increasing the reliability of the device during ultra-low temperature operation.

[0030] Embodiment 2:

[0031] As shown in Figure 5 The scroll compressor includes the outer shell and the liquid-impact-preventing structure in Embodiment 1. The outer shell serves as the overall protective shell of the scroll compressor, providing physical protection for the internal liquid-impact-preventing structure and other components, preventing external impurities, dust, etc. from entering the interior of the compressor and affecting its normal operation. The rotating shaft 1 is installed inside the outer shell, and the outer surface of the static disc 4 is rigidly connected to the inner wall of the outer shell, so that the static disc 4 remains stable during the operation of the compressor and does not displace or shake due to the vibration of the compressor or other external forces, thereby ensuring the cooperation precision and stability between the static disc 4 and the dynamic disc 3, and facilitating the normal operation of the liquid-impact-preventing structure.

[0032] Working principle: before starting, the dynamic disc 3 and the static disc 4 are attached, the rotating shaft 1 is in a static state, the fan-shaped counterweight 2 is also in a relatively static position, at this time, the compression space and the pressure relief space are in the initial state, when the compressor starts to run, the motor drives the rotating shaft 1 to rotate, the rotating shaft 1 drives the fan-shaped counterweight 2 to rotate through the mounting part 5, with the decreasing of the revolution radius of the dynamic disc 3, the gas is continuously compressed, the pressure is gradually increased, when the pressure in the compression space increases to a certain extent, the pressure acting on the fan-shaped counterweight 2 will also increase accordingly, so as to drive the fan-shaped counterweight 2 to slide together with the dynamic disc 3 relative to the static disc 4, at this time, the attached surface between the static disc 4 and the dynamic disc 3 is partially or completely separated, the original compression space becomes the pressure relief space, the high-pressure refrigerant gas can be quickly discharged from the pressure relief space, so as to avoid the liquid refrigerant accumulated in the compression cavity to cause the liquid strike phenomenon, with the discharge of the high-pressure refrigerant gas in the compression space, the pressure in the compression space gradually decreases, when the pressure decreases to a certain extent, the pressure acting on the fan-shaped counterweight 2, the dynamic disc 3 and the static disc 4 reaches a new balance, the fan-shaped counterweight 2 can follow the dynamic disc 3 to reattach with the static disc 4, and return to the normal compression state, and the compressor continues to run normally.

[0033] In the description of the utility model, need explanation further, unless have explicit provision and limitation, term " set " " install " " link " " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside intercommunication. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0034] The above only is the preferred embodiment of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiment, for those skilled in the art, still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part technical features. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A liquid strike prevention structure, characterized by, Include: The rotating shaft (1) and the fan-shaped weight block (2) are movably connected with the outer surface of the rotating shaft (1), The fan-shaped weight block (2) is movably connected with the dynamic disc (3), the outer side of the dynamic disc (3) is movably installed with the static disc (4), the compression space is formed between the static disc (4) and the dynamic disc (3), the fan-shaped weight block (2) can slide relative to the static disc (4) along with the dynamic disc (3), at this time, the static disc (4) and the dynamic disc (3) form a pressure relief space.

2. The liquid strike prevention structure according to claim 1, characterized by: One end of the rotating shaft (1) is fixedly connected with the mounting portion (5), and the fan-shaped weight block (2) is movably connected with the outer periphery of the mounting portion (5).

3. The liquid strike prevention structure according to claim 1, characterized by: The outer surface of the fan-shaped weight block (2) is fixedly connected with the fan-shaped scattering plate (6).

4. The liquid strike prevention structure according to claim 2, characterized by: One end of the weight portion is provided with a clamping groove (7), the length direction of the clamping groove (7) is the same as the length direction of the mounting portion (5), and the length of the clamping groove (7) is greater than the length of the mounting portion (5).

5. The liquid strike prevention structure according to claim 4, characterized by: The clamping groove (7) is a waist-shaped hole structure.

6. The liquid strike prevention structure according to claim 4, characterized by: The length direction of the clamping groove (7) is a semicircle or arc structure.

7. Scroll compressor comprising a liquid-knock prevention structure according to any one of claims 2 to 6, characterized in that: Further comprising a shell, the rotating shaft (1) is detachably connected inside the shell, and the outer surface of the static disc (4) is rigidly connected with the inner wall of the shell.

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