Cylinder assembly, mounting method of cylinder and compressor

Abstract

The invention provides an air cylinder assembly, an air cylinder installation method and a compressor, the air cylinder assembly comprises an air cylinder, the cylinder wall of the air cylinder is provided with a blade groove and a through hole, and the first end of the through hole is communicated with the blade groove in the axial direction of the through hole; the blade is arranged in the blade groove and slides in the radial direction of the blade groove; the external expansion connecting pipe is inserted into the second end of the through hole; the spring comprises a first end and a second end, the diameter of the second end is larger than that of the first end, the first end of the spring extends towards the interior of the air cylinder in the radial direction of the air cylinder and makes contact with the blade, and the second end of the spring is limited to the inner wall of the external expansion connecting pipe. The sealing performance of the spring hole for exhausting air to the outside can be effectively enhanced, meanwhile, the spring pressing-in efficiency and precision can be improved technologically, installation is convenient, and the structure is reliable.

Description

Technical Field

[0001] The invention relates to the field of refrigeration equipment, in particular to a cylinder assembly, a method for installing a cylinder and a compressor. Background Art

[0002] At present, most of the compressors of refrigeration equipment on the market are rotary compressors, and their main components include housing components, motor components, pump body components and liquid storage components. Among them, the pump body component is the heart of the compressor, and its main components include: upper and lower cylinder heads, cylinders, intermediate plates, crankshafts, vanes, dust collectors, pistons and blades. Driven by the crankshaft, the piston rotates at high speed in the cylinder, forming two closed cavities in the cylinder, a low-pressure cavity and a high-pressure cavity. Low-pressure and low-temperature gas enters the low-pressure cavity from the suction hole, and the piston movement converts the low-pressure and low-temperature gas into high-pressure and high-temperature gas, which is then discharged from the high-pressure cavity, thereby achieving the purpose of compressing the gas. During the entire compression process, the blades are in close contact with the piston to ensure the normal progress of the compression process. The spring installed in the spring hole presses against the blades to ensure that the blades are always in close contact with the piston.

[0003] At present, most cylinders prevent the spring from falling off by the interference fit between the spring tail and the spring hole. However, for models with large shell diameters, the instability of the spring will increase as the spring length increases, making the spring prone to jumping, bending or breaking. Moreover, this structure is not suitable for structures that use the spring hole for exhaust.

[0004] Therefore, the present invention provides a cylinder assembly, a method for installing a cylinder, and a compressor. Summary of the invention

[0005] In view of the problems in the prior art, the purpose of the present invention is to provide a cylinder assembly, a cylinder installation method and a compressor, which overcome the difficulties of the prior art and can effectively enhance the sealing of the spring hole for exhausting air to the outside, while also improving the efficiency and accuracy of spring pressing in the process, and is easy to install and has a reliable structure.

[0006] An embodiment of the present invention provides a cylinder assembly, comprising:

[0007] A cylinder, wherein a cylinder wall of the cylinder is provided with a blade groove and a through hole, and a first end of the through hole is connected with the blade groove along the axial direction of the through hole;

[0008] a blade, disposed in the blade groove and sliding along the radial direction of the blade groove;

[0009] An outwardly expanded connecting tube, plugged into the second end of the through hole;

[0010] A spring, the spring comprising a first end and a second end, the diameter of the second end being larger than the diameter of the first end, the first end of the spring extending radially toward the inside of the cylinder and contacting the blade, and the second end of the spring being limited to the inner wall of the outward expansion connecting pipe.

[0011] Preferably, a chamfer is provided at a connection between the second end of the through hole and the cylinder wall of the cylinder, and the outwardly expanded connecting pipe enters the through hole through the chamfer and has an interference fit with the inner wall of the through hole.

[0012] Preferably, the cylinder wall of the cylinder is also provided with an external expansion hole, which is connected to the end of the through hole away from the blade groove along the radial direction of the cylinder, the diameter of the external expansion hole is larger than the diameter of the through hole, and the external expansion connecting pipe is inserted into the inner circumference of the external expansion hole.

[0013] Preferably, the second end of the spring is interference fit with the inner wall of the outward expansion connecting tube.

[0014] Preferably, the outward expansion connecting tube comprises a first end and a second end with a diameter larger than that of the first end, and the first end of the outward expansion connecting tube is plugged into the outward expansion hole.

[0015] Preferably, the outwardly expanded connecting tube is deformed and expanded by the interference force of the second end of the spring, and is sealed and matched with the inner wall of the through hole.

[0016] Preferably, the outward expansion connecting tube comprises a first end, a diameter-changing transition portion and a second end, the diameter of the first end of the outward expansion connecting tube is smaller than the diameter of the second end of the outward expansion connecting tube, and the diameter-changing transition portion connects the first end and the second end respectively.

[0017] Preferably, the inner wall of the first end of the outwardly expanded connecting tube is concentric with the inner wall of the through hole and has the same diameter.

[0018] An embodiment of the present invention further provides a method for installing a cylinder, using the above-mentioned cylinder assembly, comprising the following steps:

[0019] Pre-installing the outward expansion connecting pipe into the through hole of the cylinder;

[0020] Pre-installing the spring into the second end of the outward expansion connecting tube, with the first end of the spring pointing toward the inner cavity of the cylinder;

[0021] The spring and the outward expansion connecting tube are pressed synchronously into the inner cavity of the cylinder by a pressure head until the second end of the spring has an interference fit with the inner wall of the outward expansion connecting tube, and the outward expansion connecting tube has an interference fit with the inner wall of the through hole of the cylinder.

[0022] An embodiment of the present invention further provides a compressor, characterized in that it comprises the above-mentioned cylinder assembly.

[0023] The cylinder assembly, the cylinder installation method and the compressor of the present invention can effectively enhance the sealing performance of the spring hole for exhausting air to the outside, and can also improve the efficiency and accuracy of spring pressing in terms of technology, and are easy to install and have a reliable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0025] Figure 1 Schematic diagram of the cylinder assembly of the present invention.

[0026] Figure 2 It is a side view of the cylinder assembly of the present invention.

[0027] Figure 3 for Figure 2 Sectional view along AA direction.

[0028] Reference numerals

[0029] 1 Cylinder

[0030] 11 Blade slot

[0031] 12 Through holes

[0032] 13 External expansion hole

[0033] 2 blades

[0034] 3 Spring

[0035] 31 First End

[0036] 32 Second End

[0037] 4 External expansion connection pipe

[0038] 41 First End

[0039] 42 Reducer transition section

[0040] 43 Second End DETAILED DESCRIPTION

[0041] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through other different specific implementation methods, and the details in the present application can also be modified or changed in various ways according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0042] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in a variety of different forms and is not limited to the embodiments described herein.

[0043] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In order to clearly describe the present application, components irrelevant to the description are omitted, and the same reference symbols are given to the same or similar components throughout the specification.

[0046] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0047] When a device is said to be "on" another device, it may be directly on the other device, but there may also be other devices between it. In contrast, when a device is said to be "directly" on another device, there are no other devices between it.

[0048] Although the terms first, second, etc. are used to represent various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate the existence of features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0049] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present application. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0050] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with the relevant technical literature and the contents of the current disclosure, and unless defined, shall not be overly interpreted as ideal or very formal meanings.

[0051] Figure 1 Schematic diagram of a cylinder assembly of the present invention. Figure 2 It is a side view of the cylinder assembly of the present invention. Figure 3 for Figure 2 The cross-sectional view along the AA axis. Figures 1 to 3As shown, an embodiment of the present invention provides a cylinder assembly, including: a cylinder 1, a blade 2, an outward expansion connecting pipe 4 and a spring 3. Among them, the cylinder wall of the cylinder 1 is provided with a blade groove 11 and a through hole 12, the first end of the through hole 12 is connected to the blade groove 11 along the axial direction of the through hole 12, and the connection between the second end of the through hole 12 and the cylinder wall of the cylinder 1 has a chamfer (not shown in the figure), and the chamfer plays a guiding and positioning role for the outward expansion connecting pipe 4. The outward expansion connecting pipe 4 enters the through hole 12 through the chamfer and has an interference fit with the inner wall of the through hole 12. The blade 2 is arranged in the blade groove 11 and slides along the radial direction of the blade groove 11. The outward expansion connecting pipe 4 is plugged into the second end of the through hole 12. The spring 3 includes a first end 31 and a second end 32, the diameter of the second end 32 is larger than the diameter of the first end 31, the first end 31 of the spring 3 extends toward the inside of the cylinder 1 along the radial direction of the cylinder 1 and contacts the blade 2, and the second end 32 of the spring 3 is limited to the inner wall of the outward expansion connecting pipe 4, but is not limited thereto. In a preferred embodiment, the cylinder wall of the cylinder 1 is further provided with an external expansion hole 13, which is connected to the end of the through hole 12 away from the blade groove 11 along the radial direction of the cylinder 1, and the diameter of the external expansion hole 13 is larger than the diameter of the through hole 12, which is conducive to inserting the external expansion connecting pipe 4 into the inner periphery of the external expansion hole 13, but is not limited to this.

[0052] In a preferred embodiment, the second end 32 of the spring 3 is interference fit with the inner wall of the outward expansion connecting tube 4 , but the present invention is not limited thereto.

[0053] In a preferred embodiment, the outward expansion connecting tube 4 includes a first end 41 and a second end 43 having a diameter larger than the first end 41 , so as to facilitate inserting the first end 41 of the outward expansion connecting tube 4 into the outward expansion hole 13 , but the present invention is not limited thereto.

[0054] In a preferred embodiment, the outward expansion connecting tube 4 is deformed and expanded by the interference force of the second end 32 of the spring 3, and is sealed with the inner wall of the through hole 12, but the invention is not limited thereto. The outward expansion connecting tube 4 is interference-fitted with the cylinder through hole 12, and the spring 3 is interference-fitted with the outward expansion connecting tube 4 at the same time. The outward expansion connecting tube 4 is slightly deformed by the internal interference force, which not only makes the combination of the outward expansion connecting tube 4 and the cylinder through hole 12 more firmly, but also makes the seal between the outward expansion connecting tube 4 and the cylinder through hole 12 more tightly, which is conducive to enhancing the air tightness of the cylinder.

[0055] In a preferred embodiment, the outward expansion connecting tube 4 includes a first end 41, a variable diameter transition portion 42 and a second end 43. The diameter of the first end 41 of the outward expansion connecting tube 4 is smaller than the diameter of the second end 43 of the outward expansion connecting tube 4. The variable diameter transition portion 42 connects the first end 41 and the second end 43 respectively. The diameter of the variable diameter transition portion 42 can change uniformly from the end connected to the first end 41 to the end connected to the second end 43, but is not limited to this.

[0056] In a preferred embodiment, the inner wall of the first end 41 of the outward expansion connecting tube 4 is concentric with the inner wall of the through hole 12 and has the same diameter, but the invention is not limited thereto. In other embodiments, the inner wall of the first end 41 of the outward expansion connecting tube 4 may also be concentric with the inner wall of the through hole 12, but the inner diameter of the first end 41 is larger than the inner diameter of the through hole 12.

[0057] The present invention makes the outward expansion connecting pipe 4 and the cylinder through hole 12 interference fit, and at the same time makes the spring 3 and the outward expansion connecting pipe 4 interference fit, and the outward expansion connecting pipe 4 is slightly deformed by the internal interference force, which not only makes the combination of the outward expansion connecting pipe 4 and the cylinder through hole 12 more firm, but also makes the outward expansion connecting pipe 4 and the cylinder through hole 12 more tightly sealed, which is conducive to enhancing the air tightness of the cylinder. The design structure of the present invention is small, easy to install, and can effectively enhance the sealing of the spring hole for exhausting to the outside.

[0058] An embodiment of the present invention further provides a method for installing a cylinder, characterized in that the method comprises using the cylinder assembly as claimed in claim 1, and comprising the following steps:

[0059] S110 , pre-install the outward expansion connecting pipe 4 into the through hole 12 of the cylinder 1 .

[0060] S120, pre-install the spring 3 into the second end 43 of the outward expansion connecting tube 4, with the first end 31 of the spring 3 pointing to the inner cavity of the cylinder.

[0061] S130, the spring 3 and the outward expansion connecting tube 4 are pressed synchronously into the inner cavity of the cylinder by the pressure head until the second end 32 of the spring 3 has an interference fit with the inner wall of the outward expansion connecting tube 4, and the outward expansion connecting tube 4 has an interference fit with the inner wall of the through hole 12 of the cylinder.

[0062] S140, withdraw the pressure head from the external expansion connecting pipe 4.

[0063] The present invention requires the use of a pressure head that matches the inner diameter of the outward expansion connecting tube 4 and the second end of the spring 3 for installation. During installation, the outward expansion connecting tube 4 and the cylinder through hole 12 are first pre-installed. At this time, the chamfer of the through hole 12 plays a positioning role for the outward expansion connecting tube 4, which facilitates the pre-installation and pressing process of the outward expansion connecting tube 4 and the cylinder through hole 12; then the spring 3 is pre-installed into the outward expansion connecting tube 4, which can prevent the spring 3 from being skewed or other poor pressing conditions during assembly; finally, the pressure head is inserted to abut against the outward expansion connecting tube 4 and the spring 3 at the same time, and the outward expansion connecting tube 4 and the spring 3 are pressed in at one time by controlling the stroke of the pressure head, so that the interior of the outward expansion connecting tube 4 is slightly deformed by the interference force, which not only makes the combination of the outward expansion connecting tube 4 and the cylinder through hole 12 more firm, but also makes the seal of the outward expansion connecting tube 4 and the cylinder through hole 12 tighter, which is beneficial to enhancing the air tightness of the cylinder. In addition, pressing the outward expansion connecting tube 4 and the spring 3 into the through hole 12 of the cylinder simultaneously not only simplifies the installation process, but also improves the installation efficiency compared to pressing the outward expansion connecting tube 4 into the through hole 12 of the cylinder and pressing the spring 3 into the outward expansion connecting tube 4 in steps.

[0064] It is understandable that the main process step that can achieve the above technical effect is S130, and even if the order of steps S110 and S120 is reversed, the actual technical effect achieved is the same, so step S120 first and then step S110 is a simple deduction that does not deviate from the inventive concept of this case and falls within the protection scope of the present invention. The process design of the present invention is easy to install and can effectively improve the efficiency and accuracy of spring pressing.

[0065] The embodiment of the present invention further provides a compressor, comprising the above-mentioned cylinder assembly. Since the compressor of the present invention adopts the above-mentioned cylinder assembly, its structural features, technology and effects are as above, and will not be described in detail here.

[0066] In summary, the purpose of the present invention is to provide a cylinder assembly, a cylinder installation method and a compressor, which can effectively enhance the sealing of the spring hole for exhausting air to the outside, while also improving the efficiency and accuracy of spring pressing in the process, and is easy to install and has a reliable structure.

[0067] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A cylinder assembly, characterized in that: include: A cylinder (1), wherein a cylinder wall of the cylinder (1) is provided with a blade groove (11) and a through hole (12), and a first end of the through hole (12) is connected to the blade groove (11) along the axial direction of the through hole (12); a blade (2) disposed in the blade groove (11) and sliding along the radial direction of the blade groove (11); An outwardly expanded connecting tube (4) plugged into the second end of the through hole (12); A spring (3), the spring (3) comprising a first end (31) and a second end (32), the diameter of the second end (32) being greater than the diameter of the first end (31), the first end (31) of the spring (3) extending radially toward the inside of the cylinder (1) and contacting the blade (2), the second end (32) of the spring (3) being limited to the inner wall of the outward expansion connecting pipe (4).

2. The cylinder assembly according to claim 1, characterized in that The connection between the second end of the through hole (12) and the cylinder wall of the cylinder (1) has a chamfer, and the outward expansion connecting pipe (4) enters the through hole (12) through the chamfer and is interference-fitted with the inner wall of the through hole (12).

3. The cylinder assembly according to claim 1, characterized in that: The cylinder wall of the cylinder (1) is also provided with an external expansion hole (13), the external expansion hole (13) is connected to an end of the through hole (12) away from the blade groove (11) along the radial direction of the cylinder (1), the diameter of the external expansion hole (13) is larger than the diameter of the through hole (12), and the external expansion connecting pipe (4) is inserted into the inner periphery of the external expansion hole (13).

4. The cylinder assembly according to claim 3, characterized in that The second end (32) of the spring (3) is interference-fitted with the inner wall of the outwardly expanded connecting tube (4).

5. The cylinder assembly according to claim 3, characterized in that: The outward expansion connecting tube (4) comprises a first end (41) and a second end (43) having a diameter greater than that of the first end (41), and the first end (41) of the outward expansion connecting tube (4) is plugged into the outward expansion hole (13).

6. The cylinder assembly according to claim 5, characterized in that The outwardly expanded connecting tube (4) is deformed and expanded by the interference force of the second end (32) of the spring (3), and is sealed with the inner wall of the through hole (12).

7. The cylinder assembly according to claim 1, characterized in that The outward expansion connecting tube (4) comprises a first end (41), a diameter-changing transition portion (42) and a second end (43); the diameter of the first end (41) of the outward expansion connecting tube (4) is smaller than the diameter of the second end (43) of the outward expansion connecting tube (4); and the diameter-changing transition portion (42) respectively connects the first end (41) and the second end (43).

8. The cylinder assembly according to claim 7, characterized in that The inner wall of the first end (41) of the outwardly expanded connecting pipe (4) is concentric with the inner wall of the through hole (12) and has the same diameter.

9. A method for installing a cylinder, characterized in that: The cylinder assembly according to claim 1 is used, comprising the following steps: Pre-installing the outward expansion connecting pipe (4) into the through hole (12) of the cylinder (1); The spring (3) is pre-installed into the second end (43) of the outward expansion connecting tube (4), with the first end (31) of the spring (3) pointing toward the inner cavity of the cylinder; The spring (3) and the outward expansion connecting tube (4) are synchronously pressed into the inner cavity of the cylinder by a pressure head until the second end (32) of the spring (3) is interference-fitted with the inner wall of the outward expansion connecting tube (4), and the outward expansion connecting tube (4) is interference-fitted with the inner wall of the through hole (12) of the cylinder.

10. A compressor, characterized in that: Comprising the cylinder assembly as claimed in claim 1.

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