Totally-closed piston compressor

Abstract

The invention provides a totally-closed piston compressor, relates to the field of compressors, and aims to solve the problem that an oil suction pipe assembly is insufficient in oil pumping capacity when an existing compressor operates, a limiting clamping plate is installed at the bottom in a machine shell of the compressor, and an avoiding hole allowing the oil suction pipe assembly to penetrate through is formed in the limiting clamping plate; the limiting clamping plate is combined with the bottom of the inner cavity of the machine shell to form an open cavity for containing lubricating oil, the movement range of the lubricating oil is limited when the compressor inclines or shakes, and therefore the depth of the lubricating oil is guaranteed, and the oil pumping amount is guaranteed. The vortex formed by the lubricating oil in the open cavity is disturbed, the vortex formed when the lubricating oil is rapidly extracted is reduced, the immersion depth of the oil suction pipe assembly is guaranteed, the requirement for the oil pumping amount is met, and therefore the service life of the compressor is prolonged.

Description

Technical Field

[0001] The invention relates to the field of compressors, and in particular to a fully enclosed piston compressor. Background Art

[0002] At present, reciprocating compressors are required to be placed vertically on refrigeration appliances during operation. For refrigeration appliances in some special application fields, there are cases where severe jolting and tilting occur during the operation of the refrigeration appliances when plugged in. In this case, the refrigeration oil inside the compressor will tilt, resulting in a sufficient oil immersion depth between the crankshaft oil suction pipe assembly of the compressor and the refrigeration oil, which will cause the bottom of the crankshaft oil suction pipe to be unable to absorb enough oil, resulting in the inability to lubricate the moving parts inside the compressor normally, and causing wear of the moving parts; for refrigeration appliances in severe jolting scenarios, such as car refrigerators and refrigerated trucks, the movement inside the compressor will vibrate, and the movement jolting will cause material shedding or wear at the limit position of the movement. When the compressor is running, the shed material will enter the friction pair of the parts through the lubrication system, aggravating the wear of the parts and reducing the operating life of the compressor.

[0003] A compressor stable oil supply device is disclosed in a Chinese patent (publication number CN 108561313 B, publication date 20180921), in which the oil suction pipe is provided with at least one damper at the oil suction end, and the damper includes a mounting portion connected to the oil suction pipe and an oil stabilizing flange extended to the periphery, and a bubble crushing structure is provided on the periphery of the oil stabilizing flange to avoid the generation of large bubbles. However, the oiling structure of the existing compressor will drive the lubricating oil to rotate when rotating at high speed, and a lubricating oil vortex will be generated near the crankshaft oil suction pipe, which reduces the depth of the oil suction pipe immersed in the lubricating oil and reduces the oil pumping capacity of the crankshaft oil suction pipe assembly, especially when the compressor is running for the first time or in the re-operation stage after a long period of non-operation. In addition, when the amount of oil pumped is insufficient, the friction between the moving parts inside the compressor increases, which will cause the moving parts to move unsmoothly, thereby causing the vibration of the movement to intensify, and will also cause material shedding and accelerated wear, affecting the operating life of the compressor. Summary of the invention

[0004] The purpose of the present invention is to provide a fully enclosed piston compressor in view of the defects of the prior art, wherein a limit card is installed at the bottom of the inner casing of the compressor, and an avoidance hole is provided on the limit card for the oil suction pipe assembly to pass through. The limit card is combined with the bottom of the inner cavity of the casing to form an open cavity for accommodating lubricating oil, thereby limiting the movement range of the lubricating oil when the compressor is tilted or shaken, thereby ensuring the depth of the lubricating oil to ensure the amount of oil pumped. The limit card is equipped with a spoiler card that probes into the formed open cavity to disturb the vortex formed by the lubricating oil in the open cavity, reduce the vortex formed when the lubricating oil is quickly extracted, ensure the immersion depth of the oil suction pipe assembly, meet the oil pumping quantity requirement, and thus improve the service life of the compressor.

[0005] In order to solve the above problems, the following solutions are adopted:

[0006] A fully enclosed piston compressor, comprising:

[0007] The casing is provided with an inner cavity, in which a movement is installed;

[0008] The limiting card plate has a circumferential edge connected to the inner wall of the inner cavity to form an open cavity located at the bottom of the inner cavity, and the opening of the open cavity is a avoidance hole distributed on the limiting card plate for the oil suction pipe assembly to pass through;

[0009] The spoiler card is installed on the limiting card plate and extends into the open cavity.

[0010] Furthermore, it also includes a limiting assembly, which includes a plurality of limiting members installed on the top of the movement, and the limiting members face the casing to abut against the casing to prevent the movement from colliding with the casing.

[0011] Furthermore, the limiting assembly includes a head limiting member, a first tail limiting member and a second tail limiting member, the head limiting member is installed on the head of the cylinder seat of the movement, and the first tail limiting member and the second tail limiting member are installed at intervals on the tail of the cylinder seat of the movement.

[0012] Furthermore, a plurality of spoiler cards are provided, which are distributed annularly around the avoidance hole. The spoiler cards extend radially along the avoidance hole to the inside of the avoidance hole, and a gap is left between the spoiler cards and the oil suction pipe assembly.

[0013] Furthermore, one end of the spoiler card is connected to the inner wall of the avoidance hole, and the other end faces the oil suction pipe assembly.

[0014] Furthermore, an avoidance groove is provided on the limit clamping plate, one end of the avoidance groove is connected to the avoidance hole, and the avoidance groove penetrates the limit clamping plate along the axial direction of the avoidance hole to serve as an oil return structure.

[0015] Furthermore, the movement is connected to a suspension spring, the suspension spring passes through an avoidance groove, and the avoidance groove and the spoiler card are arranged in a staggered manner.

[0016] Furthermore, along the radial direction of the avoidance hole, the limiting clamping plate forms a concave structure that is recessed toward the axis of the avoidance hole.

[0017] Furthermore, a limiting column is installed on the limiting clamping plate to cooperate with the elastic member to support the movement.

[0018] Furthermore, the limit card plate and the spoiler card are integrally stamped and formed.

[0019] Compared with the prior art, the present invention has the following advantages and positive effects:

[0020] In view of the problem of insufficient oil pumping capacity of the oil suction pipe assembly during the operation of the current compressor, a limit card is installed at the bottom of the compressor casing. The limit card is provided with an avoidance hole for the oil suction pipe assembly to pass through. The limit card is combined with the bottom of the inner cavity of the casing to form an open cavity for accommodating the lubricating oil, thereby limiting the movement range of the lubricating oil when the compressor is tilted or shaken, thereby ensuring the depth of the lubricating oil to ensure the amount of oil pumped. The limit card is equipped with a spoiler card that probes into the formed open cavity to disturb the vortex formed by the lubricating oil in the open cavity, reduce the vortex formed when the lubricating oil is quickly extracted, ensure the immersion depth of the oil suction pipe assembly, meet the oil pumping quantity requirement, and thus improve the operating life of the compressor.

[0021] A limit assembly is installed on the movement, and the limit assembly is located between the movement and the inner wall of the casing. When the movement of the compressor shakes due to external bumps and vibrations, the limit assembly can collide with the inner wall of the casing and can use its flexible material to reduce vibration and energy consumption, thereby protecting the movement, reducing material shedding and wear caused by collision, and ensuring the service life of the compressor.

[0022] The lubricating oil limit card plate is provided with an avoidance hole for avoiding the oil suction pipe assembly, and an avoidance groove for avoiding the suspension spring structure is provided for the variable frequency compressor. The avoidance groove can meet the installation requirements of the movement, and can also serve as an auxiliary oil return structure to promote the lubricating oil to flow back from the top of the limit card plate to the open cavity below the limit card plate; combined with the limit card plate, a concave structure is formed that is recessed toward the axis of the avoidance hole to ensure oil return efficiency and oil pumping volume, thereby improving the smoothness of the movement of moving parts and reducing movement vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] Figure 1 Schematic top view of the internal movement of the fully enclosed piston compressor in Example 1 of the present invention.

[0025] Figure 2This is a schematic diagram of the arrangement of a limit clamping plate inside the fully enclosed piston compressor in Example 1 of the present invention.

[0026] Figure 3 Schematic diagram of the structure of the limiter in Example 1 of the present invention.

[0027] Figure 4 Schematic diagram of the structure of another limiting member in Example 1 of the present invention.

[0028] Figure 5 Schematic diagram of the structure of another limiting member in Example 1 of the present invention.

[0029] Figure 6 This is a schematic diagram of the structure of the limit clamp in Example 1 of the present invention.

[0030] In the figure, 1. first tail limiter; 2. second tail limiter; 3. head limiter; 4. lubricating oil; 5. limiter card; 6. oil suction pipe assembly; 7. limiter column; 8. lower shell; 9. upper shell; 10. cylinder seat; 11. cylinder head; 12. avoidance hole; 13. avoidance groove; 14. spoiler card. DETAILED DESCRIPTION

[0031] Example 1

[0032] In a typical embodiment of the present invention, Figure 1-Figure 6 As shown, a fully enclosed piston compressor is provided.

[0033] At present, when the compressor is running, it is affected by its working environment and there are working conditions such as bumps and tilts, which result in sufficient oil immersion depth between the crankshaft oil suction pipe assembly 6 of the compressor and the refrigeration oil, so that the bottom of the crankshaft oil suction pipe cannot absorb enough oil. At the same time, due to the vortex of lubricating oil 4 generated near the oil suction pipe, the depth of the oil suction pipe entering the lubricating oil 4 is insufficient, which also leads to insufficient oil absorption of the oil suction pipe, affecting the operation of the compressor, causing the vibration of the compressor, causing material shedding and accelerated wear, and affecting the operating life of the compressor. Based on this, this embodiment provides a fully enclosed piston compressor, by installing a limit card plate 5 at the bottom of the casing, limiting the range of movement of the lubricating oil 4 when tilting or shaking, ensuring the depth of the lubricating oil 4, ensuring a stable supply of pump oil, so that the internal moving parts of the compressor are well lubricated, and the spoiler card 14 disturbs the vortex of the lubricating oil 4, reducing the influence of the vortex, ensuring the immersion depth of the oil suction pipe assembly 6, further meeting the pump oil demand, thereby reducing a series of problems caused by poor lubrication and improving the overall performance and operating life of the compressor.

[0034] The following is a detailed description with reference to the accompanying drawings.

[0035] like Figure 1 and Figure 2As shown, the fully enclosed piston compressor includes a casing, a movement, a limit card plate 5 and a spoiler card 14, wherein the casing is welded by an upper shell 9 and a lower shell 8 to form a fully enclosed structure, an inner cavity is formed inside the casing, and the movement, the limit card plate 5 and the spoiler card 14 are all arranged in the inner cavity.

[0036] Specifically, the casing is the external packaging structure of the entire compressor, and its inner cavity provides installation space for internal components, protects internal movement and other components from external interference, and provides a basic framework for the installation of the limit card plate 5 and the spoiler card 14.

[0037] The limit card plate 5 is a plate structure, and its circumferential edge is adapted to the interior of the inner cavity where it is installed. The circumferential edge of the limit card plate 5 is connected to the inner wall of the inner cavity of the casing, and the connection position is sealed, so that an open cavity at the bottom of the inner cavity is formed between the limit card plate 5 and the inner wall of the inner cavity below it. The open cavity is provided with an opening, and a avoidance hole 12 is provided on the limit card plate 5. The open cavity uses this avoidance hole 12 as an opening to connect to the area outside the open cavity. This avoidance hole 12 is for the oil suction pipe assembly 6 to pass through, and the lubricating oil 4 outside the open cavity can also flow back into the open cavity through the avoidance hole 12. It not only ensures that the oil suction pipe assembly 6 can work normally, but also uses its own structure to limit the flow range of the lubricating oil 4 when the compressor is tilted or shaken, thereby stabilizing the liquid level of the lubricating oil 4 and ensuring the amount of pump oil.

[0038] The spoiler card 14 is installed on the limit card plate 5 and extends into the open cavity. Its main function is to interfere with and destroy the vortex generated when the lubricating oil 4 is quickly extracted. By disturbing the vortex, the vortex is prevented from reducing the depth of the oil suction pipe assembly 6 immersed in the lubricating oil 4, ensuring that the oil suction pipe can effectively absorb oil and meet the oil pumping amount required for the operation of the compressor.

[0039] It should be noted that, under the premise of ensuring that the spoiler card 14 does not interfere with the operation of the oil suction pipe assembly 6, the spoiler card 14 is placed close to the crankshaft rotation center to improve the interference and destruction effect on the vortex. At the same time, the size of the avoidance hole 12 opened must meet the reflux requirements and also meet the requirements of blocking the formation of an oil pool.

[0040] In this embodiment, the vibration of the movement inside the compressor may cause material shedding or wear at the limiting part of the movement, and a limiting component is provided, such as Figure 1 and Figure 2 As shown, the limiting assembly includes a plurality of limiting members installed on the top of the movement, and the limiting members face the casing to abut against the casing to prevent the movement from colliding with the casing. The limiting assembly is made of flexible material to achieve flexible collision protection function.

[0041] Specifically, the limiting assembly is composed of a head limiting member 3, a first tail limiting member 1 and a second tail limiting member 2. Figure 1 and Figure 5As shown, the head stopper 3 is installed on the head of the cylinder seat 10 of the movement, as shown in FIG. Figure 2 and Figure 3 As shown, the first tail stopper 1 and the second tail stopper 2 are installed at intervals at the tail of the cylinder seat 10 of the movement, and both face the casing. Its structural design can effectively prevent the movement from colliding with the casing during the operation of the compressor, especially under bumpy or shaking conditions, avoid damage to the movement and casing caused by collision, and ensure the normal operation of the compressor.

[0042] In this embodiment, the limit assembly adopts a PPS plastic structure. Due to the need for the limit function of different positions of the movement, limit pieces of different shapes are set. As mentioned above, there are 3 limit blocks used, and the limit pieces adopt a semi-wrapped structure to protect the limit points. The limit blocks are assembled by matching the shaft holes. The limit pieces are provided with a conical pin. The corresponding position of the cylinder seat 10 has a matching positioning hole. The flexible limit piece and the positioning hole adopt an interference fit. The first tail limit piece 1 and the second tail limit piece 2 mainly protect the limit point of the tail of the cylinder seat 10 from impact. In addition to protecting the limit point of the head of the cylinder seat 10 from impact, the head limit piece 3 also protects the cylinder head 11 from impact. Since the movement inside the compressor is connected to the shell only through a spring and an inner exhaust pipe, it is an unfixed connection method. When the compressor is in a bumpy operation scenario, the flexible limit block installed on the cylinder seat 10 will first collide with the upper shell 9. At this time, the flexible limit block plays a protective role and reduces the risk of material drop and wear.

[0043] like Figure 2 As shown, a limit card plate 5 is provided at the bottom of the lower shell 8 of the compressor, and the limit card plate 5 is welded to the platform of the lower shell 8. A avoidance hole 12 for avoiding the oil suction pipe assembly 6 is provided in the middle of the limit card plate 5. The compressor injects lubricating oil 4, and the lubricating oil 4 is affected by gravity and gathers in the open cavity at the bottom of the lower shell 8. After the oil suction pipe assembly 6 passes through the avoidance hole 12 on the limit card plate 5, it penetrates into the lubricating oil 4. When the compressor is running, the oil suction pipe assembly 6 rotates at high speed, and when it rotates at high speed, it will generate spiral lift and oil lifting pressure. The lubricating oil 4 passes through the oil channel of the oil suction pipe assembly 6 to lubricate the friction pairs inside the compressor.

[0044] The welding area of ​​the limit clamping plate 5 is a planar structure, and the limit column 7 of the movement can be welded on the upper part of the welding area to limit the relative positions of various parts inside the compressor.

[0045] like Figure 5As shown, a plurality of spoiler cards 14 are provided and distributed circumferentially around the avoidance hole 12, radially extending to the inside of the avoidance hole 12, and leaving a gap with the oil suction pipe assembly 6. One end is connected to the inner wall of the avoidance hole 12, and the other end faces the oil suction pipe assembly 6. The vortex of the lubricating oil 4 can be effectively disturbed, ensuring that the influence of the vortex on the immersion depth of the oil suction pipe assembly 6 can be effectively reduced in different directions, thereby ensuring the oil suction effect.

[0046] One end of the avoidance groove 13 is connected to the avoidance hole 12, and the limit card plate 5 is axially penetrated along the avoidance hole 12. As an oil return structure, during the operation of the compressor, the lubricating oil 4 can be guided to flow back to a suitable position, ensuring the recycling of the lubricating oil 4, maintaining the stability of the amount of the lubricating oil 4, and further ensuring the lubrication effect. The movement is connected with a suspension spring, which passes through the avoidance groove 13, and the avoidance groove 13 and the spoiler card 14 are arranged in a staggered manner.

[0047] In this embodiment, in order to improve the oil return effect, the limit clamping plate 5 forms a concave structure that is concave toward the axis of the avoidance hole 12 along the radial direction of the avoidance hole 12. This is conducive to the lubricating oil 4 gathering and flowing around the limit clamping plate 5, improving the utilization efficiency of the lubricating oil 4, and also helps to stabilize the liquid level of the lubricating oil 4 and enhance the oil supply stability of the oil suction pipe assembly 6.

[0048] The limiting column 7 is installed on the limiting card plate 5, and cooperates with the elastic member to support the movement. The position of the movement can be better fixed, the shaking and displacement of the movement during operation can be reduced, and the stability of the compressor operation can be improved.

[0049] The limiting card plate 5 and the spoiler card 14 are integrally stamped and formed, which ensures the connection strength and stability between the two, and reduces the possibility of affecting the spoiler effect and the function of the limiting card plate 5 due to looseness or damage of the connection part. When the compressor is running, the crankshaft oil suction pipe runs at high speed, and an oil vortex will be formed at the center position, which reduces the oil pumping capacity of the crankshaft oil suction pipe assembly 6. The convex spoiler card 14 is provided on the limiting card plate 5, which can ensure the stability of the liquid level of the lubricating oil 4 and improve the oil pumping capacity of the oil suction pipe assembly 6. The spoiler card 14 on the middle avoidance hole 12 of the limiting card plate 5 can adopt an integral stamping structure, or it can adopt two parts, which are welded or glued to form a component with this function.

[0050] The problem of damage caused by the movement colliding with the casing during operation is solved, and the mechanical stability and reliability of the compressor are improved. The disturbance effect of the lubricating oil 4 is optimized, and the problem of the vortex of the lubricating oil 4 affecting the oil suction of the oil suction pipe assembly 6 is more effectively solved, ensuring a stable pump oil volume. The circulation and liquid level stability problems of the lubricating oil 4, as well as the fixing and supporting problems of the movement are solved, and the operating performance and life of the compressor are comprehensively improved. The impact resistance of the compressor under harsh working conditions is significantly improved, the failures caused by the collision between the movement and the casing are reduced, and the maintenance cost is reduced.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fully enclosed piston compressor, characterized in that: include: The casing is provided with an inner cavity, in which a movement is installed; The limiting card plate has a circumferential edge connected to the inner wall of the inner cavity to form an open cavity located at the bottom of the inner cavity, and the opening of the open cavity is a avoidance hole distributed on the limiting card plate for the oil suction pipe assembly to pass through; The spoiler card is installed on the limiting card plate and extends into the open cavity.

2. The fully enclosed piston compressor according to claim 1, characterized in that: It also includes a limiting assembly, which includes a plurality of limiting parts installed on the top of the movement, and the limiting parts face the casing to abut against the casing to prevent the movement from colliding with the casing.

3. The fully enclosed piston compressor according to claim 2, characterized in that: The limiting assembly includes a head limiting member, a first tail limiting member and a second tail limiting member. The head limiting member is installed on the head of the cylinder seat of the movement, and the first tail limiting member and the second tail limiting member are installed at intervals on the tail of the cylinder seat of the movement.

4. The fully enclosed piston compressor according to claim 1, characterized in that: The spoiler cards are provided in plurality and are distributed in an annular direction around the avoidance hole. The spoiler cards extend radially along the avoidance hole to the inside of the avoidance hole and leave a gap with the oil suction pipe assembly.

5. The fully enclosed piston compressor according to claim 4, characterized in that: One end of the spoiler card is connected to the inner wall of the avoidance hole, and the other end faces the oil suction pipe assembly.

6. The fully enclosed piston compressor according to claim 1, characterized in that: The limit clamping plate is provided with an avoidance groove, one end of which is connected to the avoidance hole, and the avoidance groove penetrates the limit clamping plate along the axial direction of the avoidance hole to serve as an oil return structure.

7. The fully enclosed piston compressor according to claim 1 or 6, characterized in that: The movement is connected with a suspension spring, the suspension spring passes through an avoidance groove, and the avoidance groove and the spoiler card are arranged in a staggered manner.

8. The fully enclosed piston compressor according to claim 1, characterized in that: Along the radial direction of the avoidance hole, the limiting clamping plate forms a concave structure which is sunken toward the axis of the avoidance hole.

9. The fully enclosed piston compressor according to claim 1 or 8, characterized in that: The limit post is installed on the limit clamping plate to cooperate with the elastic member to support the movement.

10. The fully enclosed piston compressor according to claim 1, characterized in that: The limit card plate and the spoiler card are integrally stamped and formed.

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