CN219492535U - Refrigeration compressor shell - Google Patents

Abstract

The utility model relates to a refrigeration compressor shell, which belongs to the technical field of compressors and comprises a lower shell body, wherein a pit structure is arranged at the bottom of the lower shell body and is positioned under a crankshaft, and a spacer structure for blocking metal impurities in refrigerating machine oil from entering the bottom of the crankshaft is fixed at a port of the pit structure.

Description

Refrigeration compressor shell

Technical Field

The utility model relates to the technical field of compressors, in particular to a refrigeration compressor shell.

Background

As shown in fig. 1, which is a partial schematic diagram of a lower shell of a refrigeration compressor in the prior art, the bottom of the lower shell of the refrigeration compressor is generally in a continuous arc shape, a spring support seat is arranged on the plane of the bottom of the lower shell, a pump body is placed on the spring support seat of the lower shell through a pressure spring, the bottom of the lower shell is filled with refrigerating machine oil for cooling and lubricating the pump body, and the lower end face of a crankshaft of the compressor is immersed in the refrigerating machine oil.

The injection amount of the compressor refrigerating machine oil is mainly determined by the following aspects: 1) The oil quantity required by the adequate lubrication, friction heating and adequate cooling of the motor heating of each kinematic pair of the compressor is satisfied; 2) The amount of circulating oil carried by the refrigerant into the refrigerant system piping and related components is satisfied. Therefore, a certain oil entering depth of the lower end face of the crankshaft needs to be ensured, the oil is prevented from falling after entering the pump body and the system, and the lower end face of the crankshaft still can be soaked in the refrigerating machine oil, namely, a part of oil storage is ensured after the normal operation of a compressor of a refrigerating system and the oil quantity brought by the system are met.

The existing continuous arc-shaped lower shell is required to meet the oil entering depth, more refrigerating machine oil needs to be injected, and the oil storage quantity is ensured to be more and the lubrication is ensured to be sufficient. The compressor refrigerating machine oil has high price and high cost, and the high oil price reduces the competition of products. Meanwhile, because the refrigerator oil is lubricated by centrifugal force and pumped in from the bottom of the shell, metal impurities at the bottom of the shell easily enter the pump body through the oil hole, and once the impurities enter the pump body, hidden danger of pump body clamping stagnation is generated.

As disclosed in the publication CN 111271254a, an oil supply structure for a compressor is disclosed, which includes a housing, a crankshaft and an oil pump member inside the housing, the crankshaft is vertically disposed, the crankshaft has a central hole, the oil pump member is fitted to a lower portion of the central hole, a gap is provided between an outer peripheral wall of the oil pump member and an inner peripheral wall of the central hole 111, and the oil pump member is rotatable relative to the crankshaft. The shell is a lower shell, the bottom of the lower shell is still in a continuous arc shape, the required refrigerator oil quantity is large, the product competitiveness is reduced, metal impurities at the bottom of the lower shell easily enter the pump body through the oil hole, and the hidden danger of pump body clamping stagnation exists.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the shell of the refrigeration compressor, which has the advantages of simple structure, low improvement cost, obvious oil reduction and impurity reduction effects and improved product competitiveness.

In order to achieve the above purpose, the technical scheme adopted by the utility model for solving the technical problems is as follows: the refrigeration compressor shell comprises a lower shell body, wherein a pit structure is arranged at the bottom of the lower shell body and is positioned under a crankshaft, and a spacer structure for blocking metal impurities in refrigerating machine oil from entering the bottom of the crankshaft is fixed at a port of the pit structure.

The depth of the pit structure is 3-6 mm, and the diameter of the pit structure is 5-6 mm larger than the diameter of the lower end face of the crankshaft.

The spacer structure comprises a metal spacer covered at the port of the pit structure, a plurality of mounting lugs are arranged on the metal spacer along the circumferential direction, and the bottoms of the mounting lugs are connected with the upper edge of the pit structure through welding spots in a welding mode.

The metal spacer is arranged as a concave arc plate which is concave towards the center.

The metal spacer is uniformly provided with a plurality of through holes, the through holes are conical holes with the upper end aperture larger than the lower end aperture, and the upper end aperture of each through hole is 0.5-1.1 mm.

The metal spacer is arranged as an outward convex arc plate which is outward convex towards the center.

And an oil drain groove is formed between the metal spacer and the upper edge of the pit structure at a certain distance, and the width of the oil drain groove is 1.0-3.0 mm.

The metal spacer is provided with a plurality of gaps along the peripheral direction thereof, and the oil drain groove is formed between the gaps and the upper edge of the pit structure in a surrounding manner.

The beneficial effects of the utility model are as follows:

1. according to the utility model, the pit structure is added under the crankshaft at the bottom of the lower shell body, and the bottom of the long shaft of the crankshaft is immersed into the lower shell body with the pit structure, so that after the pit structure is added, the pit structure is small, and the volume of the pit structure is obviously smaller than that formed by the free surface of the continuous arc-shaped lower shell, therefore, after the oil level height same as that in the prior art is ensured, the refrigerating machine oil is obviously less than that in the prior art due to the oil retention quantity, the oil quantity poured in is less, and the cost is saved.

2. According to the utility model, the pit structure is added on the lower shell body, and the metal spacer which is recessed towards the center and is fully distributed with the conical through hole is welded at the port of the pit structure, so that impurities in the refrigerating machine oil are generally metal impurities, the density of the metal impurities is high, the metal impurities exist at the bottom of the lower shell body, in the oil pumping process, the impurities can rise along with the refrigerating machine oil, and are blocked by the spacer which is fully distributed with the conical through hole, so that the impurities are difficult to enter the bottom of the crankshaft along with the refrigerating machine oil through the through hole, and the refrigerating machine oil can flow to the bottom of the crankshaft through the through hole due to the existence of the through hole, so that lubrication of the pump body is ensured, the reliability and the service life of the pump body in long-time operation are ensured.

3. According to the utility model, the pit structure is additionally arranged on the lower shell body, the metal spacer which protrudes outwards towards the center and has a certain gap between the circumference and the pit structure port is welded at the pit structure port, because impurities are generally metal impurities, the metal impurities have high density and are present at the bottom of the shell, in the oil pumping process, the impurities can rise along with refrigerating machine oil, the metal spacer can prevent the impurities from entering the bottom of the crankshaft due to upward bending of the metal spacer, the refrigerating machine oil can enter the bottom of the crankshaft through the gap (oil drain groove) between the spacer and the pit structure port, even if the impurities are turned into the metal spacer through the oil drain groove, the metal spacer bends upwards due to the action of gravity, the metal impurities can not overcome the gravity and move upwards, so that almost no impurities exist in the refrigerating machine oil passing through the long bottom of the crankshaft, the refrigerating mechanism can flow towards the bottom of the crankshaft through the oil drain groove, the lubrication of the pump body is ensured not to be blocked by the impurities, and the reliability and the service life of the long-time running of the pump body are ensured.

4. According to the utility model, the pit structure is added on the lower shell body, and the spacer structures with different radians are welded at the pit structure, so that the spacer structures have certain positions and volumes, and the spacer structures can raise the oil surface after the refrigerator oil is injected, so that the oil injection quantity can be further reduced, and the cost is saved.

5. The utility model can destroy vortex and turbulence formed when the crankshaft rotates at high speed after the pit structure and the spacer structure are added on the lower shell body, reduce turbulence excitation mechanical noise, and simultaneously reduce noise source intensity due to the fact that the quantity of oil is reduced and the refrigerator oil is relatively weakened as a noise transmission channel, thereby reducing the noise of the compressor.

Drawings

The contents of the drawings and the marks in the drawings of the present specification are briefly described as follows:

FIG. 1 is a partial schematic view of a prior art lower shell of a refrigeration compressor;

FIG. 2 is a schematic view of the assembly of the pump body of the present utility model into a lower housing structure;

FIG. 3 is a partial schematic view of a crankshaft immersed in a lower housing oil surface in accordance with an embodiment of the present utility model;

FIG. 4 is a front view of the spacer structure of FIG. 3;

FIG. 5 is an isometric view of FIG. 4;

FIG. 6 is a top view of a two-piece spacer structure welded to a lower housing in accordance with an embodiment of the present utility model;

FIG. 7 is a B-B cross-sectional view of FIG. 6;

FIG. 8 is a front view of the spacer structure of FIG. 6;

FIG. 9 is an isometric view of FIG. 8;

the labels in the above figures are: 1. the lower shell body, 2, pit structure, 3, bent axle, 4, spacer structure, 41, metal spacer, 42, mounting lug, 43, welding spot, 44, through hole, 45, notch, 5, oil drain groove.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The specific embodiments of the utility model are as follows: as shown in fig. 2, the present utility model provides a refrigeration compressor housing, the lower housing structure includes a lower housing body 1, a pit structure 2 is provided at the bottom of the lower housing body 1, the pit structure 2 is located directly below a crankshaft 3, and a spacer structure 4 for blocking metal impurities in refrigerating machine oil from entering the bottom of the crankshaft 3 is fixed at a port of the pit structure 2.

According to the utility model, the pit structure 2 is added at the bottom of the lower shell body 1, and the bottom of the long shaft of the crankshaft 3 is immersed into the lower shell body 1 with the pit structure 2, so that the volume of the pit structure 2 is obviously smaller than that formed by the free surface of the continuous arc-shaped lower shell, and after the oil level same as the prior art is ensured, the refrigerating machine oil is obviously less than the prior art in terms of oil retention quantity, the oil quantity poured in is less, and the cost is saved; and through fixed spacer structure 4 in pit structure 2 department, because spacer structure 4 has certain position and volume, spacer structure 4 can raise the oil level after injection refrigerator oil, consequently can further reduce the oiling volume, practiced thrift the cost.

According to the utility model, after the pit structure 2 and the spacer structure 4 are added on the lower shell body 1, vortex and turbulence formed during high-speed rotation of the crankshaft 3 can be destroyed, the turbulence excitation mechanical noise is reduced, meanwhile, as the oil quantity is reduced, the transmission channel of the refrigerating machine oil serving as noise is relatively weakened, the noise source intensity is reduced, and thus the noise of the compressor is reduced.

Specifically, the depth of the pit structure 2 is 3-6 mm, the diameter of the pit structure 2 is 5-6 mm larger than the diameter of the lower end face of the crankshaft 3, the depth and the diameter of the pit structure 2 are set according to the requirement of the reduced refrigerating machine oil quantity, the oil quantity of refrigerating machine oil entering a compressor pump body and a refrigerating system needs to be met, a certain oil quantity is reserved, and when the crankshaft 3 is placed into the lower shell body 1 with the pit structure 2 along with the pump body, after the refrigerating machine oil is injected, the height between the upper oil surface of the refrigerating machine oil and the bottom of the pit structure 2 is consistent with the height between the upper oil surface of the lower shell and the continuous circular-arc lower bottom surface in the prior art.

According to the utility model, the spacer structure 4 is fixed at the port of the pit structure 2, the spacer structure 4 comprises a plurality of types, the spacer structure 4 comprises a metal spacer 41 covered at the port of the pit structure 2, a plurality of mounting lugs 42 are circumferentially arranged on the metal spacer 41, and the bottoms of the mounting lugs 42 are welded and connected with the upper edge of the pit structure 2 through welding points 43, so that the mounting stability of the spacer structure 4 is ensured. The specific structure of the spacer structure 4 and the principle of blocking metallic impurities in the refrigerator oil from entering the bottom of the crankshaft 3 will be specifically described below by taking the first embodiment and the second embodiment as examples.

Example 1

As shown in fig. 3 to 5, the metal spacer 41 is a concave arc plate recessed toward the center, a plurality of through holes 44 are uniformly distributed on the metal spacer 41, each through hole 44 is a conical hole with an upper end aperture larger than a lower end aperture, and the upper end aperture of the through hole 44 is 0.5-1.1 mm.

According to the utility model, the pit structure 2 is added on the lower shell body 1, the metal spacer 41 which is recessed towards the center and is fully distributed with the conical through hole 44 is welded at the port of the pit structure 2, and the impurities in the refrigerating machine oil are generally metal impurities, so that the density of the metal impurities is high, and the bottom of the lower shell body 1 exists, and in the oil pumping process, the impurities can rise along with the refrigerating machine oil, and are blocked by the metal spacer 41 which is fully distributed with the conical through hole 44, so that the impurities are difficult to enter the bottom of the crankshaft 3 along with the refrigerating machine oil through the through hole 44, and the refrigerating machine oil can flow to the bottom of the crankshaft 3 through the through hole 44, so that the lubrication of the pump body is ensured, the clamping stagnation of the impurities is avoided, and the reliability and the service life of the pump body for long-time running are ensured.

Example two

As shown in fig. 6 to 9, the metal spacer 41 is configured as an outward convex arc plate protruding toward the center, the metal spacer 41 is provided with a plurality of notches 45 along the peripheral direction thereof, the notches 45 may be configured as arc notches, and a drain groove 5 is defined between the notch 45 and the upper edge of the pit structure 2, that is, a distance is formed between the metal spacer 41 and the upper edge of the pit structure 2 to form the drain groove 5, so that the drain groove 5 is in an arc hollow structure, and the width of the drain groove 5 is 1.0-3.0 mm.

According to the utility model, the pit structure 2 is added on the lower shell body 1, the metal spacer 41 protruding outwards towards the center and forming the oil drain groove 5 between the circumference and the port of the pit structure 2 is welded at the port of the pit structure 2, because impurities generally cause metal impurities, the metal impurities have high density and exist at the bottom of the shell, in the oil pumping process, the impurities can rise along with refrigerating machine oil, the metal spacer 41 can prevent the impurities from entering the bottom of the crankshaft 3 due to upward bending of the metal spacer 41, the refrigerating machine oil can enter the bottom of the crankshaft 3 through the oil drain groove 5, even if the impurities are turned into the metal spacer 41 through the oil drain groove 5, the metal spacer 41 is bent upward due to the action of gravity, the metal impurities cannot overcome the gravity and move upwards, so that almost no impurities exist in the refrigerating machine oil which passes through the long bottom of the crankshaft 3 can flow towards the bottom of the crankshaft 3 through the oil drain groove 5, the lubrication of a pump body is ensured, the reliability and the service life of the pump body which runs for a long time are ensured.

In summary, the refrigeration compressor shell designed by the utility model has the advantages of simplicity, low improvement cost, obvious oil reduction and impurity reduction effects, ensures the reliability and the service life of the pump body in long-time operation, and improves the competitiveness of products.

The foregoing is provided by way of illustration of the principles of the present utility model, and is not intended to be limited to the specific constructions and applications illustrated herein, but rather to all modifications and equivalents which may be utilized as fall within the scope of the utility model as defined in the claims.

Claims (8)

1. The utility model provides a refrigeration compressor casing, its characterized in that includes the inferior valve body, the bottom of inferior valve body is provided with the pit structure, the pit structure is located the bent axle under, the port department of pit structure is fixed with the spacer structure that is arranged in blocking the metallic impurity in the refrigerator oil to get into the bent axle bottom.

2. The refrigerant compressor housing as set forth in claim 1, wherein: the depth of the pit structure is 3-6 mm, and the diameter of the pit structure is 5-6 mm larger than the diameter of the lower end face of the crankshaft.

3. The refrigerant compressor housing as set forth in claim 1, wherein: the spacer structure comprises a metal spacer covered at the port of the pit structure, a plurality of mounting lugs are arranged on the metal spacer along the circumferential direction, and the bottoms of the mounting lugs are connected with the upper edge of the pit structure through welding spots in a welding mode.

4. A refrigeration compressor housing as set forth in claim 3 wherein: the metal spacer is arranged as a concave arc plate which is concave towards the center.

5. The refrigerant compressor housing as set forth in claim 4, wherein: the metal spacer is uniformly provided with a plurality of through holes, the through holes are conical holes with the upper end aperture larger than the lower end aperture, and the upper end aperture of each through hole is 0.5-1.1 mm.

6. A refrigeration compressor housing as set forth in claim 3 wherein: the metal spacer is arranged as an outward convex arc plate which is outward convex towards the center.

7. The refrigerant compressor housing as set forth in claim 6, wherein: and an oil drain groove is formed between the metal spacer and the upper edge of the pit structure at a certain distance, and the width of the oil drain groove is 1.0-3.0 mm.

8. The refrigerant compressor housing as set forth in claim 7, wherein: the metal spacer is provided with a plurality of gaps along the peripheral direction thereof, and the oil drain groove is formed between the gaps and the upper edge of the pit structure in a surrounding manner.