Multifunctional compression system seal

Abstract

The utility model relates to a kind of multifunctional compression system sealing structure, wherein multifunctional compression system sealing structure includes air compressor bearing, air compressor bearing is sleeved on motor spindle, air compressor bearing is abutted on first step portion;Bearing limiting wave sheet, bearing limiting wave sheet is sleeved on compressor spindle, bearing limiting wave sheet is abutted with air compressor bearing, bearing limiting wave sheet is clamped with cylinder;Shaft seal baffle ring, shaft seal baffle ring is sleeved on compressor spindle, shaft seal baffle ring is clamped with cylinder;Shaft seal, shaft seal is sleeved on compressor spindle, shaft seal is abutted with shaft seal baffle ring;Thrust bearing, thrust bearing is sleeved on compressor spindle, thrust bearing is abutted with shaft seal, thrust bearing is abutted on second step portion.The utility model can be through the corresponding structure of the sleeve between motor spindle and compressor spindle, avoid the case that motor is arranged outside cylinder, interpenetration between cylinder and motor occurs, and the case that stability is not good.

Description

Technical Field

[0001] This utility model relates to a compressor, and more particularly to a sealing structure for a multifunctional compression system. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.

[0003] With the increasing variety of new energy vehicles, some models now offer in-vehicle refrigerators, which are powered by a motor to keep the compressor running.

[0004] Existing vehicle refrigerators typically have a built-in compressor specifically designed for the vehicle refrigerator, which drives the compressor's main shaft to move the piston. However, in certain situations, to accommodate different motor layouts, such as placing the motor at the top of the refrigerator compressor's cylinder and connecting it to other vehicle-mounted mechanisms, the cylinder may be affected by air leakage from one side of the compressor, leading to liquid or gas seepage. This can affect the performance and lifespan of the vehicle compressor. Furthermore, since the motor shaft and compressor shaft are located in separate physical spaces, the stability of their operation is poor.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0006] The purpose of this invention is to provide a multifunctional compression system sealing structure that, by fitting a corresponding structure between the motor spindle and the compressor spindle, avoids mutual leakage and poor stability between the cylinder and the motor when the motor is located outside the cylinder.

[0007] To achieve the above objectives, this utility model discloses a multifunctional compression system sealing structure, wherein the vehicle-mounted system includes a refrigerator compressor and a motor, the refrigerator compressor includes a compressor main shaft and a cylinder, the motor includes a motor main shaft, a first end of the motor main shaft is connected to a second end of the compressor main shaft, wherein the first end of the motor main shaft has a first stepped portion, and the second end of the compressor main shaft has a second stepped portion, and the multifunctional compression system sealing structure includes:

[0008] An air compressor bearing is sleeved on the motor main shaft, and the second end of the air compressor bearing abuts against the first stepped portion;

[0009] A bearing limiting waveform sheet is sleeved on the compressor main shaft. The second end of the bearing limiting waveform sheet abuts against the first end of the air compressor bearing, and the bearing limiting waveform sheet is engaged with the cylinder body.

[0010] A shaft seal retaining ring is sleeved on the compressor main shaft and is engaged with the cylinder block.

[0011] A shaft seal is fitted onto the compressor main shaft, and the second end of the shaft seal abuts against the first end of the shaft seal retaining ring.

[0012] A thrust bearing is sleeved on the compressor main shaft, the second end of the thrust bearing abuts against the first end of the shaft seal, and the first end of the thrust bearing abuts against the second step portion.

[0013] As a further description of the above technical solution, the sealing structure of the multi-functional compression system also includes a motor base, and the cylinder and the motor are connected through the motor base.

[0014] As a further description of the above technical solution, the first end of the motor is configured as a tapered portion with a reduced radial dimension, and the motor base is sleeved on the tapered portion.

[0015] As a further description of the above technical solution, the cylinder body has an annular groove on the side facing the motor base, and the second end of the motor base is inserted into the annular groove.

[0016] As a further description of the above technical solution, the second end of the cylinder has a mounting groove, and the bearing limiting wave plate, the shaft seal retaining ring, the shaft seal and the thrust bearing are installed in the mounting groove.

[0017] As a further description of the above technical solution, the shaft seal abuts against the inner wall of the mounting groove in a radially outward direction.

[0018] As a further description of the above technical solution, the shaft seal abuts against the outer wall of the compressor main shaft radially inward.

[0019] As a further description of the above technical solution, the inner wall of the mounting groove has a first groove that is radially concave, and the shaft seal retaining ring is engaged in the first groove.

[0020] As a further description of the above technical solution, the inner wall of the mounting groove has a second groove that is radially concave, and the bearing limiting wave plate is engaged in the second groove.

[0021] As a further description of the above technical solution, the motor spindle is configured as an internal hexagonal shaft, and the compressor spindle is configured as an external hexagonal shaft. The size of the internal hexagonal shaft matches the size of the external hexagonal shaft, and the internal hexagonal shaft is fitted onto the external hexagonal shaft along the direction from the second end to the first end.

[0022] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0023] This invention's multifunctional compression system sealing structure, through a corresponding structure fitted between the motor spindle and the compressor spindle, avoids mutual leakage and poor stability between the cylinder and motor when the motor is located outside the cylinder body. Specifically, this invention uses a bearing limiting wave plate to press against the air compressor bearing to maintain the stable rotation of the motor spindle, placing them together as one part. A shaft seal retaining ring is then pressed against the shaft seal, forming a sealed connection at the compressor spindle along the first end direction to the second end direction. This significantly improves the sealing performance between the refrigerator compressor and the motor, extending its service life.

[0024] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a cross-sectional schematic diagram of a sealing structure for a multifunctional compression system provided in the embodiments of this specification;

[0027] Figure 2 This is an exploded view of a sealing structure for a multifunctional compression system provided in the embodiments of this specification;

[0028] In the picture:

[0029] 1. Refrigerator compressor; 11. Compressor main shaft; 111. Second step section; 12. Cylinder block; 121. First slot; 122. Second slot; 123. Mounting slot; 13. Piston;

[0030] 3. Motor; 31. Motor spindle; 311. First step section; 32. Motor base; 33. Air compressor bearing; 34. Bearing limit wave plate; 35. Shaft seal retaining ring; 36. Shaft seal; 37. Thrust bearing. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0032] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.

[0033] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.

[0034] Please see Figure 1-2 This embodiment provides a multi-functional compression system sealing structure. The vehicle-mounted system includes a refrigerator compressor 1 and a motor 3. The refrigerator compressor 1 includes a compressor main shaft 11 and a cylinder 12. The motor 3 includes a motor main shaft 31. A first end of the motor main shaft 31 is connected to a second end of the compressor main shaft 11. The first end of the motor main shaft 31 has a first stepped portion 311, and the second end of the compressor main shaft 11 has a second stepped portion 111. The multi-functional compression system sealing structure includes:

[0035] Air compressor bearing 33 is sleeved on motor main shaft 31, and the second end of air compressor bearing 33 abuts against the first step portion 311;

[0036] The bearing limiting waveform 34 is sleeved on the compressor main shaft 11. The second end of the bearing limiting waveform 34 abuts against the first end of the air compressor bearing 33. The bearing limiting waveform 34 is engaged with the cylinder body 12.

[0037] Shaft seal retaining ring 35 is sleeved on the compressor main shaft 11 and is engaged with the cylinder body 12;

[0038] Shaft seal 36 is sleeved on compressor main shaft 11, and the second end of shaft seal 36 abuts against the first end of shaft seal retaining ring 35;

[0039] The thrust bearing 37 is sleeved on the compressor main shaft 11. The second end of the thrust bearing 37 abuts against the first end of the shaft seal, and the first end of the thrust bearing 37 abuts against the second step portion 111.

[0040] Specifically, with the above structure, the air compressor bearing 33 in this embodiment mainly serves to connect directly to the motor main shaft 31 and mainly bears the radial load perpendicular to the axis of the motor main shaft 31, keeping the rotor radially concentric and reducing friction to ensure smooth rotation. Similarly, the thrust bearing 37 is located on the side closest to the compressor main shaft 11 and is mainly used to bear the axial thrust in the direction parallel to the shaft axis to prevent the rotor from overshooting due to the axial force generated by the pressure difference. The bearing limiting wave plate 34 has axial elasticity and is snapped onto the inner wall of the cylinder 12 to apply a constant axial preload, eliminate bearing clearance, suppress vibration and improve rigidity. Through the elastic deformation of its own wave spring, it applies an initial force to both ends in the axial direction to keep them in stable contact.

[0041] The shaft seal retaining ring 35 and shaft seal 36 in this embodiment are the most significant differences from existing connection structures. In this embodiment, the motor 3 is located adjacent to the refrigerator compressor 1 and is positioned at the top of the cylinder 12 of the refrigerator compressor 1. Since one side of the refrigerator compressor 1 is primarily used for refrigerant processing, other structures may be installed at the end of the motor 3 facing away from the refrigerator compressor 1. For example, in one embodiment, the end of the motor 3 facing away from the refrigerator compressor 1 is connected to an air compressor, which is primarily used for air processing. Furthermore, the refrigerant and air cannot come into contact with each other. Therefore, the shaft seal retaining ring 35 and shaft seal 36 are needed to effectively isolate the compressor 1 and the air compressor 2, preventing contact between the refrigerant and air. Specifically, the outer wall of the shaft seal 36 is fitted against the inner wall of the cylinder 12 of the refrigerator compressor 1, so that the first end of the shaft seal 36 is completely isolated from the second end.

[0042] Specifically, in this utility model, the bearing limiting wave plate 34 is used to press against the air compressor bearing 33 to maintain the stable rotation of the motor main shaft. By placing them together as a part, the transmission distance of the motor 3 is too far due to the fact that the motor 3 is set on the outside of the refrigerator compressor 1 in this embodiment, which avoids the vibration that may be caused by transmission instability and reduces the abnormal noise of the motor 3.

[0043] In this embodiment, the shaft seal retaining ring 35 is further pressed against the shaft seal 36, so that the shaft seal 36 forms a sealed connection at the compressor main shaft 11 from the first end direction to the second end direction, which significantly improves the sealing performance between the refrigerator compressor and the motor and extends its service life. Furthermore, the combination of the air compressor bearing 33 and the bearing limiting wave plate 34 described above does not interfere with the combination of the shaft seal retaining ring 35 and the shaft seal 36.

[0044] Of course, in this embodiment, in order to improve the stability of the overall device, the shaft seal retaining ring 35 and shaft seal 36 used for sealing are isolated between the thrust bearing 37 used to provide axial thrust in the direction parallel to the axis of rotation and the air compressor bearing 33 used to provide radial thrust. Therefore, the excess force is distributed and eliminated more evenly, and the overall stability is improved.

[0045] Please see Figure 1 In this embodiment, a motor base 32 is also provided, through which the cylinder 12 and the motor 3 are connected. The first end of the motor 3 is configured as a tapered portion with a reduced radial dimension, and the motor base 32 is fitted onto the tapered portion. Therefore, the contact surface between the motor base 32 and the motor 3 is relatively large, achieving a connection with better sealing. The provision of the motor base 32 improves the structural stability between the motor 3 and the cylinder 12, while preventing leakage between the motor 3 and the cylinder 12 as a whole unit and the outside, further improving the sealing performance.

[0046] In this embodiment, the cylinder body 12 has an annular groove on the side facing the motor base 32. The second end of the motor base 32 is inserted into the annular groove, so that the second end of the cylinder body 12 covers part of the motor base 32, further avoiding the isolation of the motor 3 and the cylinder body 12 from the external environment, and making the connection between the motor 3 and the cylinder body 12 more stable, avoiding vibration and affecting passenger comfort.

[0047] Please see Figure 1The second end of the cylinder body has a mounting groove 123, in which a bearing limiting wave plate 34, a shaft seal retaining ring 35, a shaft seal 36, and a thrust bearing 37 are installed. Specifically, the mounting groove 123 is configured as an approximately cylindrical space recessed from the second end of the cylinder body 12 towards the first end, and the radial dimension of the mounting groove 123 is matched as closely as possible to the corresponding bearing limiting wave plate 34, shaft seal retaining ring 35, shaft seal 36, and thrust bearing 37 structures, thereby improving its sealing performance and preventing leakage between the motor 3 and the interior of the cylinder body 12. Specifically, the shaft seal 36 abuts against the inner wall of the mounting groove 123 radially outward, and simultaneously abuts against the outer wall of the compressor main shaft 11 radially inward. In other words, the shaft seal 36 structure itself forms a barrier that isolates the interior of the motor 3 and the cylinder body 12, and fills the internal structure of the compressor main shaft 11, achieving a seal from the inside out.

[0048] The cross-sectional structure of the shaft seal 36 is designed to have a certain arc shape, and the shaft seal 36 is made of elastic and wear-resistant material, which can be tightly pressed against the outer wall of the compressor main shaft 11 and the inner wall of the mounting groove 123.

[0049] The inner wall of the mounting groove 123 has a radially concave first groove 121, and the shaft seal retaining ring 35 is engaged in the first groove 121. Specifically, the first groove 121 is radially concave into the mounting groove 123, so that the shaft seal retaining ring 35 can be radially engaged in it. Specifically, the shaft seal retaining ring 35 can be configured as a C-shaped structure. During installation, by squeezing and deforming the shaft seal retaining ring 35, the C-shaped structure shrinks inward, making it easy and quick to engage in the first groove 121 and support it to maintain stability.

[0050] Similarly, the inner wall of the mounting groove 123 has a radially concave second groove 122, and the bearing limiting wave plate 34 is engaged within the second groove 122. The bearing limiting wave plate 34 is configured as an elastic element with an axially wavy, annular structure, and is mounted and limited in a manner as shown in the image. Figure 1 The second slot 122 shown is used to abut against the air compressor bearing 33 at the top position, and the deformation of the bearing itself provides cushioning.

[0051] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.

[0052] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0053] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.

Claims

1. A sealing structure for a multifunctional compression system, characterized in that, The vehicle-mounted system includes a refrigerator compressor and a motor. The refrigerator compressor includes a compressor main shaft and a cylinder. The motor includes a motor main shaft. A first end of the motor main shaft is connected to a second end of the compressor main shaft. The first end of the motor main shaft has a first stepped portion, and the second end of the compressor main shaft has a second stepped portion. The sealing structure of the multi-functional compression system includes: An air compressor bearing is sleeved on the motor main shaft, and the second end of the air compressor bearing abuts against the first stepped portion; A bearing limiting waveform sheet is sleeved on the compressor main shaft. The second end of the bearing limiting waveform sheet abuts against the first end of the air compressor bearing, and the bearing limiting waveform sheet is engaged with the cylinder body. A shaft seal retaining ring is sleeved on the compressor main shaft and is engaged with the cylinder block. A shaft seal is fitted onto the compressor main shaft, and the second end of the shaft seal abuts against the first end of the shaft seal retaining ring. A thrust bearing is sleeved on the compressor main shaft, the second end of the thrust bearing abuts against the first end of the shaft seal, and the first end of the thrust bearing abuts against the second step portion.

2. The sealing structure of the multifunctional compression system according to claim 1, characterized in that: The sealing structure of the multi-functional compression system also includes a motor base, and the cylinder and the motor are connected through the motor base.

3. The sealing structure of the multifunctional compression system according to claim 2, characterized in that: The first end of the motor is configured as a tapered portion with a reduced radial dimension, and the motor base is fitted onto the tapered portion.

4. The sealing structure of the multifunctional compression system according to claim 2, characterized in that: The cylinder body has an annular groove on the side facing the motor base, and the second end of the motor base is inserted into the annular groove.

5. The sealing structure of the multifunctional compression system according to claim 1, characterized in that: The second end of the cylinder has a mounting groove, in which the bearing limiting wave plate, the shaft seal retaining ring, the shaft seal and the thrust bearing are installed.

6. The sealing structure of the multifunctional compression system according to claim 5, characterized in that: The shaft seal abuts against the inner wall of the mounting groove in a radially outward direction.

7. The sealing structure of the multifunctional compression system according to claim 6, characterized in that: The shaft seal abuts against the outer wall of the compressor main shaft radially inward.

8. The sealing structure of the multifunctional compression system according to claim 5, characterized in that: The inner wall of the mounting groove has a first groove that is concave in the radial direction, and the shaft seal retaining ring is engaged in the first groove.

9. The sealing structure of the multifunctional compression system according to claim 5, characterized in that: The inner wall of the mounting groove has a second groove that is radially concave, and the bearing limiting wave plate is engaged in the second groove.

10. The sealing structure of the multifunctional compression system according to claim 1, characterized in that: The motor spindle is configured with an internal hexagonal socket, and the compressor spindle is configured with an external hexagonal socket. The size of the internal hexagonal socket matches the size of the external hexagonal socket, and the internal hexagonal socket is fitted onto the external hexagonal socket along the direction from the second end to the first end.

Images