CN215213848U - Novel compressor oil pump structure - Google Patents

Abstract

The utility model discloses a novel compressor oil pump structure, including the bent axle, the bent axle includes minor axis, balance disc, major axis, the lateral wall of major axis is equipped with the helicla flute, the lower extreme of helicla flute is equipped with the lower extreme hole of radial extension, the inside of major axis is equipped with the oil absorption passageway, the one end of oil absorption passageway with the lower extreme hole intercommunication of helicla flute, the other end of oil absorption passageway connects oil absorption hole, oil absorption hole is located the lower extreme of the periphery side of major axis; the lower end of the long shaft is sleeved with an outer sleeve oil suction pipe; the utility model discloses a with the oil absorption hole set up in the periphery side of major axis makes the eccentricity of inhaling oil pipe way bigger, and the pump oil ability is better.

Description

Novel compressor oil pump structure

Technical Field

The utility model relates to compressor equipment technical field, concretely relates to novel compressor oil pump structure.

Background

The compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas, and is the heart of a refrigeration system. The refrigeration cycle comprises a gas suction pipe, a motor, a piston, an exhaust pipe, a compression pipe, a condensation pipe, an expansion pipe, an evaporation pipe, a heat exchange pipe and a heat exchange pipe.

The compressor structurally comprises a cylinder body, a rotor, a stator, a piston, a valve plate, a connecting rod, a crankshaft, an end cover and other parts. Wherein, the number of the parts which move relatively is large, and especially, certain lubricating and cooling effects need to be satisfied between the parts which move relatively.

For reciprocating piston refrigeration compressors, there are two types of existing oil pump structures:

1) the crankshaft is internally sleeved with an oil suction pipe, as shown in the fifth figure, the oil suction pipe is embedded in a larger inner hole at the lower end of the long shaft of the crankshaft, and an oil suction spacer is embedded in the oil suction pipe.

2) The integral crankshaft without oil suction is shown in figure six, an inclined oil hole at the lower end of a long shaft plays a role in pumping oil, and the oil pumping capacity is related to the eccentric amount and the angle of the inclined hole.

Chinese utility model with application number CN201510535105.1 discloses a novel refrigeration compressor's bent axle specially adapted for 11 months 11 years 2015, including bent axle major axis (being the long axis body), bent axle minor axis (being the short axis body of eccentric part) and balancing block and near-end helicla flute, centrifugal groove, distal end helicla flute, exhaust hole, centrifugal hole, inlet port, oilhole and bent axle oil jacket isotructure. The novel crankshaft of the refrigeration compressor provided by the invention is simple in structure, easy to process and install, and capable of realizing low-speed oil pumping feasibility and high-speed oil pumping reasonable. The problem of traditional inverter compressor pump oil not enough when the low speed, pump oil is surplus when high-speed is solved.

However, the prior art has the following technical defects: (1) for the first inner sleeve oil suction pipe structure, in order to ensure the strength of the crankshaft, the outer wall of the inner hole needs to ensure a certain thickness, so that the diameter of an oil hole actually playing a role in centrifugal oil pumping is 2-3mm smaller than the outer diameter of a long shaft, and therefore, the diameter of the long shaft of the crankshaft cannot be too small in order to ensure smooth oil pumping by the structure. Particularly when the pump is used for the variable frequency compressor, the pump can not produce oil at low rotating speed of less than 1200 r/min; (2) for the second type of integrated crankshaft (without oil suction pipe), this configuration is typically used for fixed frequency compressors. The eccentric quantity of the center of the lower end face hole of the crankshaft inclined oil hole cannot be too large, otherwise, the lower end of the oil hole can be broken, the angle cannot be too large, and otherwise, the upper end of the oil hole can be broken. In order to ensure smooth oil pumping, the diameter of the long shaft of the crankshaft cannot be too small.

Disclosure of Invention

The utility model aims at the problem that prior art exists, provide a novel compressor oil pump structure, through with the oil absorption hole set up in the periphery side of major axis makes the eccentric volume of oil absorption pipeline bigger, and the pump oil ability is better.

In order to achieve the above object, the utility model adopts the following technical scheme:

a novel compressor oil pump structure comprises a crankshaft, wherein the crankshaft comprises a short shaft, a balance disc and a long shaft, one end of the short shaft is connected with an eccentric position of the upper side of the balance disc, one end of the long shaft is connected with the central position of the lower side of the balance disc, the outer side wall of the long shaft is provided with a spiral groove, the upper end of the spiral groove is provided with an upper end hole extending along the radial direction of the long shaft, one end of the upper end hole, which is positioned in the long shaft, is connected with an oil outlet channel, the lower end of the spiral groove is provided with a lower end hole extending along the radial direction of the long shaft, an oil suction channel is arranged in the long shaft, one end of the oil suction channel is communicated with the lower end hole of the spiral groove, the other end of the oil suction channel is connected with an oil suction hole, and the oil suction hole is positioned at the lower end of the outer peripheral side of the long shaft; the outer side of the lower end of the long shaft is sleeved with an outer sleeve oil suction pipe.

In the scheme, the crankshaft is driven to rotate by a motor in the compressor, the lower end of the long shaft is immersed in an oil pool at the bottom of the compressor, when the long shaft rotates, lubricating oil is sucked from the oil suction hole, flows out from the lower end hole through the oil suction channel under the action of centrifugal force, enters the spiral groove, enters the oil outlet channel from the upper end hole of the spiral groove, and is guided to a position needing cooling by the oil outlet channel;

the key point of the scheme is that the oil suction holes in the prior art are all arranged on the lower end face of the long shaft, so that the oil pumping capacity is insufficient, and the oil suction holes are arranged on the outer peripheral side of the long shaft, so that the oil suction channel connected with the oil suction holes can be arranged to have a larger inclination angle, and the oil pumping capacity is improved.

Further, the oil suction hole is located at the joint of the outer periphery side and the lower end surface of the long shaft, the lower end of the oil suction hole is arranged at the edge of the lower end surface of the long shaft, the side end of the oil suction hole is arranged at the outer periphery side of the long shaft, and the upper end of the oil suction hole is inclined inwards along the radial direction of the long shaft. By arranging the side end of the oil suction hole at the outer periphery of the long shaft, lubricating oil can rise along the oil suction hole more easily, and the oil pumping capacity is improved.

Furthermore, the inner side wall of the outer sleeve oil suction pipe covers the side end of the oil suction hole, and the lower end of the outer sleeve oil suction pipe is provided with an oil inlet hole. The outer sleeve oil suction pipe rotates along with the long shaft, and the outer sleeve oil suction pipe sucks lubricating oil in the oil pool for more convenient oil pumping.

Furthermore, a pump oil spacer is fixedly arranged in the outer sleeve oil suction pipe, and the oil inlet hole is divided into two parts by the pump oil spacer.

Further, the outer sleeve oil suction pipe is in interference connection with the long shaft.

Furthermore, the side of week of minor axis is equipped with the oil outlet and passes through the oil distribution groove of oil outlet. The oil distributing groove is used for guiding and distributing the lubricating oil.

Furthermore, the oil outlet hole is connected with the oil outlet channel, one end of the oil outlet channel is located inside the short shaft, and the other end of the oil outlet channel extends to the long shaft and is connected with the upper end hole. Because the minor axis is not in same axial with the major axis, the oil outlet channel can be set to the slope, is convenient for produce oil.

Furthermore, an air channel is arranged inside the long shaft, one end of the air channel extends to the lower end face of the long shaft, and the other end of the air channel extends to the upper end face of the balance disc. The gas channel is used for discharging air in the lubricating oil.

Furthermore, the spiral direction of the spiral groove is the same as that of the long shaft, and the spiral groove is used for enabling lubricating oil to spirally rise under the action of centrifugal force.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the oil suction hole in the prior art is arranged on the lower end face of the long shaft, so that the eccentricity of the oil suction hole from the center of the lower end face cannot be too large, otherwise, the lower end of the oil hole is broken, and the oil suction hole is arranged on the outer peripheral side of the long shaft, so that an oil suction channel connected with the oil suction hole can be arranged to have a larger inclination angle under the same diameter of a crankshaft as that of the prior art, namely, the eccentricity of the oil suction channel is larger, and the oil pumping capacity is improved;

2. the outer sleeve oil suction pipe is sleeved on the outer side wall of the long shaft, so that the inner diameter of the outer sleeve oil suction pipe playing a role in pumping oil is larger than that of an inner sleeve structure in the prior art, and the oil pumping capacity is improved;

3. when the diameter of the crankshaft is fixed, compared with the existing structure with an oil suction pipe, the oil pumping capacity is stronger, and smooth oil pumping at lower rotating speed can be ensured when the variable frequency compressor is used;

4. when the rotating speed is fixed, the diameter of the crankshaft can be designed to be smaller under the condition of ensuring that the oil pumping capacity is not changed, so that the friction area is reduced, the friction power consumption is reduced, and the COP value is improved.

Drawings

Fig. 1 is an explosion schematic diagram of a novel oil pump structure of the compressor of the present invention;

fig. 2 is an explosion schematic diagram of the structure of the novel compressor oil pump of the present invention;

fig. 3 is a schematic diagram of the structure of the oil pump of the novel compressor of the present invention;

fig. 4 is a perspective view of the structure of a novel compressor oil pump of the present invention;

fig. 5 is a schematic diagram of an oil pump structure in the prior art of the present invention;

fig. 6 is a schematic diagram of an oil pump structure in the prior art of the present invention;

in the figure: 1. a minor axis; 2. a balance disc; 3. a long axis; 4. a helical groove; 5. an upper end hole; 6. an oil outlet channel; 7. a lower end hole; 8. an oil suction passage; 9. an oil suction hole; 10. an oil suction pipe is sleeved outside; 11. an oil inlet hole; 12. an oil outlet hole; 13. an oil distributing groove; 14. A gas channel.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "horizontal", "vertical", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 4, a novel oil pump structure of a compressor comprises a crankshaft, wherein the crankshaft comprises a short shaft 1, a balance disc 2 and a long shaft 3, one end of the short shaft 1 is connected with the eccentric position of the upper side of the balance disk 2, one end of the long shaft 3 is connected with the central position of the lower side of the balance disk 2, the outer side wall of the long shaft 3 is provided with a spiral groove 4, the upper end of the spiral groove 4 is provided with an upper end hole 5 extending along the radial direction of the long shaft 3, one end of the upper end hole 5 positioned in the long shaft 3 is connected with an oil outlet channel 6, the lower end of the spiral groove 4 is provided with a lower end hole 7 extending along the radial direction of the long shaft 3, an oil suction passage 8 is arranged in the long shaft 3, one end of the oil suction passage 8 is communicated with the lower end hole 7 of the spiral groove 4, the other end of the oil suction channel 8 is connected with an oil suction hole 9, and the oil suction hole 9 is positioned at the lower end of the outer peripheral side of the long shaft 3; the outer side of the lower end of the long shaft 3 is sleeved with an outer sleeve oil suction pipe 10.

In the scheme, the crankshaft is driven to rotate by a motor in the compressor, the lower end of the long shaft 3 is immersed in an oil pool at the bottom of the compressor, when the long shaft 3 rotates, lubricating oil is sucked from an oil suction hole 9, flows out from a lower end hole 7 through an oil suction channel 8 under the action of centrifugal force, enters the spiral groove 4 and then enters an oil outlet channel 6 through an upper end hole 5 of the spiral groove 4, and the lubricating oil is guided to a position needing cooling through the oil outlet channel 6;

the key point of the above scheme is that the oil suction holes 9 in the prior art are all arranged on the lower end surface of the long shaft 3, which results in insufficient oil pumping capability, and the oil suction passages 8 connected with the oil suction holes 9 can be arranged to have a larger inclination angle by arranging the oil suction holes 9 on the outer periphery side of the long shaft 3, so that the oil pumping capability is improved.

Further, the oil suction hole 9 is located at the junction of the outer periphery side and the lower end surface of the long shaft 3, the lower end of the oil suction hole 9 is arranged at the edge of the lower end surface of the long shaft 3, the side end of the oil suction hole 9 is arranged at the outer periphery side of the long shaft 3, and the upper end of the oil suction hole 9 is inclined inwards along the radial direction of the long shaft 3. By connecting the side end of the oil suction hole 9 with the outer periphery side of the long shaft 3, the lubricating oil can rise along the oil suction hole 9 more easily, and the oil pumping capacity is improved.

The inner side wall of the outer sleeve oil suction pipe 10 covers the side end of the oil suction hole 9, and the lower end of the outer sleeve oil suction pipe 10 is provided with an oil inlet hole 11. The outer sleeve oil suction pipe 10 rotates along with the long shaft 3, and the outer sleeve oil suction pipe 10 sucks lubricating oil in an oil pool for more conveniently pumping the oil.

Further, an oil pumping spacer is fixedly arranged in the outer sleeve oil suction pipe 10, and the oil inlet hole 11 is divided into two parts by the oil pumping spacer.

Further, the outer sleeve oil suction pipe 10 is in interference connection with the long shaft 3.

Further, the peripheral side surface of the short shaft 1 is provided with an oil outlet hole 12 and an oil distribution groove 13 passing through the oil outlet hole 12. The oil distribution groove 13 is used for guiding and distributing the lubricating oil.

Further, the oil outlet 12 is connected to the oil outlet channel 6, one end of the oil outlet channel 6 is located inside the short shaft 1, and the other end of the oil outlet channel 6 extends to the long shaft 3 and is connected to the upper end hole 5. Since the short axis 1 and the long axis 3 are not in the same axial direction, the oil outlet channel 6 can be inclined, so that oil can be conveniently pumped to a lubricating part.

Further, an air channel 14 is arranged inside the long shaft 3, and one end of the air channel 14 extends to the lower end face of the long shaft 3, and the other end extends to the upper end face of the balance disc 2. The gas passage 14 is used to discharge excess air in the lubricating oil.

Further, the spiral direction of the spiral groove 4 is the same as the spiral direction of the long shaft 3, and the spiral groove 4 is used for enabling lubricating oil to spirally rise under the action of centrifugal force.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. A novel compressor oil pump structure is characterized by comprising a crankshaft, wherein the crankshaft comprises a short shaft, a balance disc and a long shaft, one end of the short shaft is connected with an eccentric position of the upper side of the balance disc, one end of the long shaft is connected with the central position of the lower side of the balance disc, the outer side wall of the long shaft is provided with a spiral groove, the upper end of the spiral groove is provided with an upper end hole extending along the radial direction of the long shaft, one end of the upper end hole, located in the long shaft, is connected with an oil outlet channel, the lower end of the spiral groove is provided with a lower end hole extending along the radial direction of the long shaft, an oil suction channel is arranged in the long shaft, one end of the oil suction channel is communicated with the lower end hole of the spiral groove, the other end of the oil suction channel is connected with an oil suction hole, and the oil suction hole is located at the lower end of the outer peripheral side of the long shaft; the outer side of the lower end of the long shaft is sleeved with an outer sleeve oil suction pipe.

2. The novel compressor oil pump structure as claimed in claim 1, wherein the inner sidewall of the outer casing oil suction pipe covers the side end of the oil suction hole, and the lower end of the outer casing oil suction pipe is provided with an oil inlet hole.

3. The novel compressor oil pump structure as claimed in claim 2, wherein a pump oil spacer is fixedly arranged in the outer sleeve oil suction pipe, and the pump oil spacer divides the oil inlet hole into two parts.

4. The novel compressor oil pump structure as claimed in claim 1, wherein the outer casing oil suction pipe is in interference connection with the long shaft.

5. The novel compressor oil pump structure as claimed in claim 1, wherein the peripheral side surface of the stub shaft is provided with an oil outlet hole and an oil distributing groove passing through the oil outlet hole.

6. The novel compressor oil pump structure as claimed in claim 5, wherein the oil outlet hole is connected to the oil outlet channel, one end of the oil outlet channel is located inside the short shaft, and the other end of the oil outlet channel extends to the long shaft and is connected to the upper end hole.

7. The novel compressor oil pump structure as claimed in claim 1, wherein a gas channel is provided inside the long shaft, one end of the gas channel extends to the lower end face of the long shaft, and the other end of the gas channel extends to the upper end face of the balance disc.

8. The novel compressor oil pump structure as claimed in claim 1, wherein the spiral direction of the spiral groove is the same as the spiral direction of the long shaft, and the spiral groove is used for enabling lubricating oil to spirally rise under the action of centrifugal force.

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