A cylinder structure, a pump body assembly, and a rotary compressor

Abstract

This utility model belongs to the technical field of rotary compressors, and discloses a cylinder structure, a pump body assembly, and a rotary compressor, including a cylinder body; a working chamber is provided at the center of the cylinder body, and a vane groove is provided on the cylinder wall of the cylinder body; the vane groove includes a strip-shaped groove segment and an elongated hole segment connected in sequence in the direction away from the working chamber; a spring hole is also provided on the cylinder wall of the cylinder body, and the spring hole is arranged radially along the cylinder body; the spring hole is formed in the vane groove, and penetrates the vane groove and the outer peripheral wall of the cylinder body and the vane groove radially along the cylinder body, and at least a portion of the spring hole is located in the elongated hole segment; this utility model effectively avoids the contact friction between the tail of the vane and the groove surface between the root and the opening of the spring hole, reduces the extra power consumption during compressor operation, and reduces noise generation, effectively improving the overall performance and efficiency of the compressor.

Description

Technical Field

[0001] This utility model belongs to the technical field of rotary compressors, and specifically relates to a cylinder structure, pump body assembly and rotary compressor. Background Technology

[0002] During the operation of a rotary compressor, the stable operation of the compressor core plays a crucial role in the overall performance of the compressor. Among them, the design of the vane groove in the cylinder structure is one of the key factors affecting the operation of the compressor core. At present, the processing technology of vane groove of rotary compressor generally follows the principle of first machining the cutter hole according to the predetermined structural dimensions, and then broaching or grinding the vane groove. In the broaching or grinding process, the broaching or grinding wheel needs a large machining stroke to complete the forming of the vane groove.

[0003] However, in existing vane slots, the groove surface located between the root and opening of the spring hole does not have a positive and beneficial impact on the normal operation of the compressor. Specifically, it cannot serve as a seal to prevent compressed gas leakage and ensure the efficient operation of the compressor. At the same time, it cannot act as a guide rail to provide precise guidance for the reciprocating motion of the vane. In addition, during continuous operation of the compressor, the tail of the vane frequently contacts and rubs against the groove surface, which is prone to abnormal wear. This not only increases the extra power consumption of the compressor during operation but also generates significant noise, seriously affecting the overall performance and efficiency of the compressor. Utility Model Content

[0004] In view of the technical problems existing in the prior art, this utility model provides a cylinder structure, a pump body assembly and a rotary compressor to solve the technical problem that the groove surface located between the root of the spring hole and the opening of the spring hole in the existing vane groove does not have a positive and beneficial effect on the normal operation of the compressor.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a cylinder structure, including a cylinder body; a working chamber is provided at the center of the cylinder body, and a sliding vane groove is provided on the cylinder wall of the cylinder body; the sliding vane groove includes a strip-shaped groove segment and an elongated hole segment connected in sequence in the direction away from the working chamber. The cylinder wall of the cylinder body is also provided with a spring hole, which is arranged radially along the cylinder body; wherein, the spring hole is formed in the vane groove and passes through the vane groove and the outer peripheral wall of the cylinder body and the vane groove radially along the cylinder body, and at least a portion of the spring hole is located in the elongated hole section.

[0006] Furthermore, it also includes a sliding plate and an elastic element; the sliding plate is slidably disposed in the sliding plate groove; wherein, the head of the sliding plate faces the working cavity side, and the tail of the sliding plate faces the outer peripheral wall of the cylinder body; the elastic element is disposed in the spring hole, and the elastic element abuts against the sliding plate.

[0007] Furthermore, the distance between the end of the elongated bore near the outer peripheral wall of the cylinder body and the inner wall of the working chamber is less than the radial length of the sliding vane.

[0008] Furthermore, the inner diameter of the elongated bore section near the outer peripheral wall of the cylinder body is greater than the thickness of the tail of the sliding vane.

[0009] Furthermore, the end of the elongated hole segment that is away from the outer circumferential wall of the cylinder body does not exceed the tip of the bottom of the spring hole.

[0010] Furthermore, a safe distance is reserved between the sidewall of the elongated hole section and the pre-set cylinder screw hole on the cylinder body.

[0011] Furthermore, the elongated hole section is an elongated oval hole, and the elongated hole section penetrates both axial end faces of the cylinder body.

[0012] Furthermore, the width of the elongated hole segment is greater than the width of the strip groove segment.

[0013] This utility model also provides a pump body assembly, including the aforementioned cylinder structure.

[0014] This utility model also provides a rotary compressor, including the compressor pump body.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The cylinder structure provided by this utility model designs the vane groove as a strip-shaped groove segment and an elongated hole segment connected sequentially in the direction away from the working chamber, and makes at least a part of the spring hole located in the elongated hole segment. This effectively avoids contact friction between the tail of the vane and the groove surface between the root and the opening of the spring hole, fundamentally reducing the occurrence of abnormal wear of the vane, reducing the extra power consumption during compressor operation, reducing noise generation, and effectively improving the overall performance and efficiency of the compressor.

[0016] Furthermore, the distance between the end of the elongated bore section near the outer peripheral wall of the cylinder body and the inner wall of the working chamber is designed to be less than the radial length of the vane. This prevents the vane from completely retracting into the vane slot, ensuring the smooth movement of the vane and thus guaranteeing the normal compression operation of the compressor.

[0017] Furthermore, the inner diameter of the end of the elongated bore section closest to the outer peripheral wall of the cylinder body is designed to be greater than the thickness of the tail of the vane. This avoids interference between the tail of the vane and the elongated bore section, provides a more relaxed environment for the tail of the vane during movement, reduces jamming or abnormal stress caused by size limitations, lowers the wear risk of the tail of the vane, extends the service life of the vane, and improves the reliability of compressor operation.

[0018] Furthermore, designing the end of the elongated hole section away from the outer circumferential wall of the cylinder body to not exceed the tip of the spring hole helps maintain the stable working state of the elastic element, prevents the elastic element from being subjected to abnormal external forces due to improper positioning of the elongated hole section, ensures that the elastic element can continuously and stably provide elastic force to the slide and maintain the normal movement trajectory of the slide.

[0019] Furthermore, by reserving a safe distance between the side wall of the elongated bore section and the pre-set cylinder screw hole on the cylinder body, interference or mutual influence between the side wall of the elongated bore section and the cylinder screw hole is avoided during compressor assembly or operation, ensuring the integrity and stability of the cylinder structure and improving the overall quality and reliability of the compressor.

[0020] Furthermore, the elongated hole section is designed as an elongated oval hole, which not only meets the space requirements for the movement of the slide plate, but also better adapts to the changes in gas pressure inside the cylinder and the movement characteristics of the slide plate, making the force on the slide plate more uniform during movement; secondly, the elongated hole section passes through the two axial end faces of the cylinder body, which facilitates processing and manufacturing and improves production efficiency.

[0021] The pump body assembly and rotary compressor provided by this utility model have all the advantages of the above-mentioned cylinder structure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the cylinder structure provided for an embodiment.

[0024] The components include: 1. Cylinder body; 11. Working chamber; 12. Strip-shaped groove section; and 13. Long oval hole section. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] This utility model provides a cylinder structure, including a cylinder body 1; a working chamber 11 is provided at the center of the cylinder body 1, and a sliding vane groove is provided on the cylinder wall of the cylinder body 1; the sliding vane groove includes a strip-shaped groove segment 12 and an elongated hole segment 13 connected in sequence in the direction away from the working chamber 11; a spring hole is also provided on the cylinder wall of the cylinder body 1, and the spring hole is arranged radially along the cylinder body 1; wherein, the spring hole is formed in the sliding vane groove, and penetrates the sliding vane groove and the outer peripheral wall of the cylinder body 1 and the sliding vane groove radially along the cylinder body 1, and at least a portion of the spring hole is located in the elongated hole segment 13.

[0027] In the above embodiments, the vane groove is designed as a strip-shaped groove segment and an elongated hole segment connected in sequence, and the spring hole is formed in the vane groove and at least partially located in the elongated hole segment. By expanding the width of the groove surface between the root and the opening of the spring hole, which has no positive effect on the operation of the compressor, frequent contact friction between the tail of the vane and the root and opening of the spring hole is avoided, effectively reducing abnormal wear of the vane, thereby reducing the extra power consumption and operating noise of the compressor. At the same time, the processing technology is simplified, which helps to improve production efficiency and improves the overall performance and efficiency of the compressor in many ways.

[0028] The following detailed description uses specific embodiments to further explain the cylinder structure provided by this utility model: Example 1 As attached Figure 1 As shown, this embodiment 1 provides a cylinder structure, including a cylinder body 1, a sliding vane, and an elastic element. The cylinder body 1 has a working chamber 11 at its center. The working chamber serves as a gas compression chamber, and a roller or piston is disposed therein. A sliding vane groove is provided on the cylinder wall of the cylinder body 1. Specifically, the sliding vane groove is disposed on the cylinder wall of the cylinder body 1, one end of the sliding vane groove is connected to the inner wall of the working chamber 11, and the other end of the sliding vane groove extends radially along the cylinder body 1 and toward the outer peripheral wall of the cylinder body 1. The sliding vane is disposed in the sliding vane groove. The sliding vane is used to maintain contact with the roller or piston disposed in the working chamber to reciprocate along the sliding vane groove.

[0029] In this embodiment 1, the sliding vane groove includes a strip-shaped groove segment 12 and an elongated hole segment 13 connected in sequence in the direction away from the working cavity 11; the strip-shaped groove segment 12 is disposed on the side close to the working cavity 11, and the elongated hole segment 13 is disposed on the side away from the working cavity 11; one end of the strip-shaped groove segment 12 is connected to the inner wall of the working cavity 11, the other end of the strip-shaped groove segment 12 is connected to the head of the elongated hole segment 13, and the tail of the elongated hole segment 13 extends toward the outer peripheral wall of the cylinder body 1; wherein, the long axis or length direction of the elongated hole segment 13 is arranged radially along the cylinder body 1.

[0030] The strip-shaped groove segment 12 has a first groove wall and a second groove wall that are opposite each other and are arranged parallel to each other; the elongated hole segment 13 is an elongated hole and the elongated hole segment 13 penetrates the two axial end faces of the cylinder body 1; specifically, the elongated hole segment 13 includes a head arc hole segment, a straight hole segment and a tail arc hole segment connected in sequence; wherein, the head arc hole segment is connected to the strip-shaped groove segment 12.

[0031] A spring hole is also provided on the cylinder wall of the cylinder body 1, and the spring hole is arranged radially along the cylinder body 1. Specifically, the spring hole is formed in the slide groove and passes through the slide groove and the outer peripheral wall of the cylinder body 1 and the slide groove radially along the cylinder body 1. The elastic element is arranged in the spring hole and abuts against the slide. The elastic element is a slide spring, which is used to apply a clamping force to the slide so that the slide keeps abutting against the roller or piston.

[0032] At least a portion of the spring hole is located within the elongated section 13. The design of the end of the elongated section 13 away from the outer circumferential wall of the cylinder body 1 not exceeding the tip of the bottom of the spring hole helps to maintain the stable working state of the elastic element, prevents the elastic element from being subjected to abnormal external forces due to improper position of the elongated section, and ensures that the elastic element can continuously and stably provide elastic force to the slider and maintain the normal movement trajectory of the slider.

[0033] The width of the elongated hole section 13 is greater than the width of the strip groove section 12; specifically, the width of the straight control section is greater than the distance between the first groove wall and the second groove wall; by designing the width of the elongated hole section 13 to be greater than the width of the strip groove section 12, the distance between the groove surface between the tail of the slider and the root and opening of the spring hole is increased, thereby effectively avoiding contact friction between the tail of the slider and the groove surface between the root and opening of the spring hole, fundamentally reducing the occurrence of abnormal wear of the slider.

[0034] The distance between the end of the elongated circular hole section 13 near the outer peripheral wall of the cylinder body 1 and the inner wall of the working chamber 11 is less than the radial length of the vane; specifically, the distance between the tail arc hole section and the inner wall of the working chamber 11 is less than the length from the head to the tail of the vane, thus preventing the vane from completely retracting into the vane groove, ensuring the smooth movement of the vane, and thereby ensuring the normal compression operation of the compressor.

[0035] The inner diameter of the elongated hole section 13 near the outer peripheral wall of the cylinder body 1 is greater than the thickness of the tail of the slide plate, that is, the inner diameter of the arc-shaped hole section at the tail is greater than the thickness of the tail of the slide plate. This avoids interference between the tail of the slide plate and the elongated hole section 13, provides a more relaxed environment for the tail of the slide plate during movement, reduces jamming or abnormal force caused by size limitations, reduces the risk of wear on the tail of the slide plate, and extends the service life of the slide plate.

[0036] The end of the elongated circular hole 13 that is away from the outer circumferential wall of the cylinder body 1 does not exceed the tip of the bottom of the spring hole; specifically, the head arc hole segment is located between the tip of the bottom of the spring hole and the opening of the spring hole; designing the end of the elongated circular hole segment that is away from the outer circumferential wall of the cylinder body does not exceed the tip of the bottom of the spring hole helps to maintain the stable working state of the elastic element, prevents the elastic element from being subjected to abnormal external force due to improper position of the elongated circular hole segment, and ensures that the elastic element can continuously and stably provide elastic force to the slider and maintain the normal movement trajectory of the slider.

[0037] In this embodiment 1, the end face of the cylinder body 1 is provided with a plurality of cylinder screw holes, which are used to connect to the main bearing or auxiliary bearing of the compressor by screws; a safe distance is reserved between the side wall of the elongated section 13 and the preset cylinder screw holes on the cylinder body 1; that is, the width profile of the elongated section 13 is designed to be conducive to the blank mold making of the cylinder body 1, while ensuring an effective safe distance between it and the cylinder screws; secondly, by reserving a safe distance between the side wall of the elongated section and the preset cylinder screw holes on the cylinder body, interference or mutual influence between the side wall of the elongated section and the cylinder screw holes is avoided during compressor assembly or operation, ensuring the integrity and stability of the cylinder structure and improving the overall quality and reliability of the compressor.

[0038] Design principles: The cylinder structure described in Embodiment 1 designs the vane groove as a strip-shaped groove segment and an elongated hole segment connected sequentially in the direction away from the working chamber, with at least a portion of the spring hole located within the elongated hole segment. By improving the groove surface structure between the root and opening of the spring hole, the contact friction between the tail of the vane and the groove surface between the root and opening of the spring hole is eliminated; harmful components on the groove surface between the root and opening of the spring hole are effectively removed, reducing abnormal wear of the vane and facilitating the movement of the compressor; simultaneously, without changing the existing machining process, it is beneficial to improve the broaching and grinding quality of the cylinder vane groove and increase tool life.

[0039] It should be noted that the elongated hole section is formed by casting, that is, the blank state of the cylinder body 1 is changed from the existing cylinder with a solid state in the vane groove to a blank state with an elongated through hole in the vane groove; wherein, the original arc hole section at the tail of the elongated hole section is machined in the rough machining stage of the blank to ensure that the elongated hole section is perpendicular to the two axial end faces of the cylinder body 1.

[0040] Example 2 This embodiment 2 provides a pump body assembly, which includes a main bearing, a secondary bearing, a rotor piston, a crankshaft, and a cylinder. The main bearing and the secondary bearing are respectively disposed on both sides of the cylinder, and the cylinder adopts the cylinder structure described in embodiment 1 above. The rotor piston is disposed inside the cylinder. The secondary bearing is fitted with the short shaft diameter of the crankshaft, the main bearing is fitted with the long shaft diameter of the crankshaft, and the rotor piston is fitted with the eccentric shaft diameter of the crankshaft. The short shaft diameter, eccentric shaft diameter, and long shaft diameter of the crankshaft are connected sequentially. It should be noted that the assembly principle and process between the cylinder and the main bearing, secondary bearing, rotor piston, and crankshaft are similar to those of existing compressor pump bodies, and will not be described in detail here.

[0041] Example 3 This embodiment 3 provides a rotary compressor, including a pump body, a drive motor and a housing; the pump body adopts the pump body assembly described in embodiment 2 above.

[0042] The cylinder structure described in this utility model designs the vane groove as a strip-shaped groove segment and an elongated oval hole segment connected sequentially in the direction away from the working chamber, with at least a portion of the spring hole located within the elongated oval hole segment. By expanding the width of the groove surface between the root and opening of the spring hole, which has no positive effect on the operation of the compressor, frequent contact friction between the tail of the vane and the root and opening of the spring hole can be effectively avoided without affecting the normal operation of the compressor cylinder, fundamentally reducing the occurrence of abnormal wear of the vane. This utility model has a simple structure, is easy to implement, adapts to mass production processes, and has a low difficulty in mass production.

[0043] In this invention, the blank state of the cylinder body is changed from the original solid state in the vane groove to a blank state with a long through hole in the vane groove. This effectively removes harmful components from the groove surface between the root and the opening of the spring hole, which is beneficial to the movement of the compressor and improves the reliability of the compressor. At the same time, it can reduce the additional power consumption and noise caused by abnormal wear of the vane.

[0044] The above embodiments are merely one of the implementation methods to achieve the technical solution of this utility model. The scope of protection claimed by this utility model is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model.

Claims

1. A cylinder structure characterized by comprising: It includes a cylinder body (1); the cylinder body (1) has a working chamber (11) at its center, and a sliding vane groove is provided on the cylinder wall of the cylinder body (1); the sliding vane groove includes a strip-shaped groove section (12) and an elongated hole section (13) connected in sequence in the direction away from the working chamber (11). A spring hole is also provided on the cylinder wall of the cylinder body (1), and the spring hole is arranged radially along the cylinder body (1); wherein, the spring hole is formed in the slide groove and passes through the slide groove and the outer peripheral wall of the cylinder body (1) and the slide groove radially along the cylinder body (1), and at least a portion of the spring hole is located in the elongated hole section (13).

2. A cylinder structure according to claim 1, characterized in that It also includes a sliding plate and an elastic element; the sliding plate is slidably disposed in the sliding plate groove; wherein, the head of the sliding plate faces the working cavity (11) and the tail of the sliding plate faces the outer peripheral wall of the cylinder body (1); the elastic element is disposed in the spring hole and abuts against the sliding plate.

3. A cylinder arrangement according to claim 2, characterized in that The distance between the end of the elongated bore section (13) near the outer peripheral wall of the cylinder body (1) and the inner wall of the working chamber (11) is less than the radial length of the slide.

4. A cylinder structure according to claim 2, characterized in that The inner diameter of the elongated bore section (13) near the outer peripheral wall of the cylinder body (1) is greater than the thickness of the tail of the slide plate.

5. A cylinder structure according to claim 1, characterized in that, The end of the elongated hole section (13) that is away from the outer circumferential wall of the cylinder body (1) does not exceed the tip of the bottom of the spring hole.

6. A cylinder structure according to claim 1, characterized in that, A safe distance is reserved between the side wall of the elongated hole section (13) and the pre-set cylinder screw hole on the cylinder body (1).

7. A cylinder structure according to claim 1, characterized in that, The elongated hole section (13) is an elongated hole, and the elongated hole section (13) penetrates the two axial end faces of the cylinder body (1).

8. A cylinder structure according to claim 2, characterized in that, The width of the elongated hole section (13) is greater than the width of the strip groove section (12).

9. A pump body assembly, characterized in that, Includes the cylinder structure as described in any one of claims 1-8.

10. A rotary compressor, characterized in that, Includes the pump body assembly as described in claim 9.

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