WO2017016378A1

WO2017016378A1 - Exhaust bearing housing, screw compressor and air conditioning unit

Info

Publication number: WO2017016378A1
Application number: PCT/CN2016/088869
Authority: WO
Inventors: 陈文卿; 张天翼; 李日华; 刘华; 杨侨明; 林淑汝; 毕雨时; 彭延海; 许康; 邢子文
Original assignee: 珠海格力电器股份有限公司; 珠海格力电器科技有限公司
Priority date: 2015-07-27
Filing date: 2016-07-06
Publication date: 2017-02-02
Also published as: CN104963870A

Abstract

Disclosed is an exhaust bearing housing (10), which comprises an exhaust cavity, wherein the exhaust cavity is provided with an exhaust port (16), the exhaust cavity is configured to have a plurality of turning structures, and an exhaust airflow can change the advance direction multiple times in the exhaust cavity and finally is exhausted from the exhaust port (16). The exhaust port (16) is opened in such an orientation that in the case where the exhaust bearing housing (10) is covered in a shell, the gas exhausted from the exhaust port (16) has a component rotationally flowing along an inner wall of the shell and around an axis of the shell. The exhaust bearing housing (10) can have the function of improving the efficiency of oil separation in several aspects such as centrifugal effect, uniform flow field and impacting separation. The exhaust bearing housing (10) is provided in a screw compressor and the screw compressor is provided in an air conditioning unit.

Description

Exhaust bearing housing, screw compressor and air conditioning unit

Related application

The present application claims priority to Chinese Patent Application No. 201510449484.2, entitled "Exhaust Bearing Seat, Screw Compressor, and Air Conditioning Unit", which is incorporated herein by reference in its entirety.

Technical field

The invention relates to the field of compressors, in particular to an exhaust bearing housing, a screw compressor and an air conditioning unit.

Background technique

In the screw compressor, the exhaust end bearing housing is an indispensable structure, which functions to fix the exhaust end of the rotor, provide a spool oil chamber, provide an exhaust passage, and fix the oil filter. The exhaust bearing housing generally has a male rotor bearing cavity, a female rotor bearing cavity, a spool oil chamber and an exhaust chamber, and a return oil passage and a fuel supply passage.

As shown in Fig. 1, the oil barrel 1' covers the exhaust bearing housing 2', the exhaust chamber 3' on the exhaust bearing housing 2' is generally axially open, and the oil dividing barrel 1' is provided with an oil filter screen. 4', in the direction of the airflow, since the exhaust port 5' of the oil tank 1' is disposed upstream of the oil filter 4', the exhaust chamber 3' is generally connected to a section of the exhaust pipe 6' to the oil filter 4' Downstream. The refrigerant gas discharged from the exhaust pipe 6' is reversely passed through the oil filter 4', and then discharged to the compressor through the exhaust port 5'.

In the prior art, the exhaust chamber opening of the exhaust bearing housing is in the axial direction, and the position is above or below. After the refrigerant exits the exhaust chamber or the exhaust pipe, it is difficult to uniformly discharge through the oil filter screen. The exhaust port, which affects the oil separation efficiency of the oil filter.

Summary of the invention

The object of the present invention is to provide an exhaust bearing housing, a screw compressor and an air conditioning unit capable of uniform flow field and improved oil separation efficiency.

In order to achieve the above object, the present invention provides an exhaust bearing housing including an exhaust chamber having an exhaust port configured to have a plurality of turning structures, exhausting The air flow can be redirected multiple times in the exhaust chamber and finally discharged from the exhaust port, the opening of the exhaust port being oriented such that in the row In the case where the gas bearing housing is housed in the housing, the gas discharged from the exhaust port has a component that rotates along the inner wall of the housing and rotates around the axis of the housing.

In one of the embodiments, the opening of the exhaust port faces in a radial direction of the spool oil chamber on the exhaust bearing housing.

In one embodiment, the exhaust chamber includes a first exhaust chamber and a second exhaust chamber that are in communication with each other, the first exhaust chamber being disposed along an axial direction of the spool oil chamber, the first The two exhaust chambers are configured to have a plurality of turning structures.

In one embodiment, the second exhaust chamber includes a first chamber disposed along a radial direction of the spool oil chamber and a second chamber disposed along an axial direction of the spool oil chamber. The first chamber communicates with the first exhaust chamber and the second chamber, and the exhaust gas flows axially through the first exhaust chamber and then flows radially into the first chamber, and then axially It flows into the second chamber and finally flows out again through the exhaust port.

In one of the embodiments, the second exhaust chamber is disposed on one side of a spool oil chamber and a male rotor bearing chamber on the exhaust bearing housing.

In one embodiment, one side of the spool oil chamber and the male rotor bearing chamber on the exhaust bearing housing, and one side of the spool oil chamber and the female rotor bearing chamber on the exhaust bearing housing, The second exhaust chamber is provided.

In one embodiment, the exhaust port on each of the second exhaust chambers is disposed such that, in the case where the exhaust bearing housing is housed in the housing, the exhaust gas flow can be promoted The inner wall of the housing and the rotational flow around the axis of the housing.

In order to achieve the above object, the present invention also provides a screw compressor including an oil sub-barrel, and further comprising an exhaust bearing housing according to any of the above embodiments, wherein the oil sub-bucket includes the exhaust bearing housing cover .

In one embodiment, the oil sub-bucket is provided with an oil-separating structure, and after the exhaust gas is discharged through the exhaust port, after being filtered by the oil-separating structure, the oil-disc row arranged from the oil-tank is arranged. The port is discharged.

In order to achieve the above object, the present invention also provides an air conditioning unit comprising the screw compressor of any of the above embodiments.

Based on the above technical solutions, the present invention has at least the following beneficial effects:

The exhaust bearing housing provided by the invention has an exhaust chamber configured to have a plurality of turning structures, and the exhaust gas flow changes the flow direction multiple times in the exhaust chamber, and impacts the inner wall surface of the exhaust chamber, thereby improving the oil efficiency and flowing Multiple changes in direction Helps to reduce vibration and noise; after the exhaust airflow is exhausted from the exhaust port, under the limitation of inertia and the casing, the exhaust airflow will move circularly along the inner wall of the casing, capable of uniform flow field, and in the course of circular motion In the centrifugal force, a large oil droplet in the exhaust gas flow will be sucked onto the wall surface of the casing to further improve the oil efficiency.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic structural view of a compressor in the prior art;

2 is a schematic view showing the external structure of an exhaust bearing housing provided by the present invention;

3 is a schematic view showing another external structure of an exhaust bearing housing provided by the present invention;

4 is a schematic axial cross-sectional view of an exhaust bearing housing provided by the present invention;

Figure 5 is a cross-sectional view taken along line A-A of Figure 4;

Figure 6 is a first schematic view showing the flow of gas in the exhaust bearing housing provided by the present invention;

Figure 7 is a second schematic view showing the flow of gas in the exhaust bearing housing provided by the present invention;

Figure 8 is a schematic axial cross-sectional view showing the assembly of the exhaust bearing housing and the oil sub-barrel according to the present invention;

Figure 9 is a schematic longitudinal cross-sectional view showing the assembly of the exhaust bearing housing and the oil sub-barrel according to the present invention.

Number in the drawing:

1'-oil barrel; 2'-exhaust bearing seat; 3'-exhaust chamber; 4'-oil filter screen; 5'-exhaust port; 6'-exhaust pipe;

10- exhaust bearing housing; 11-yang rotor bearing chamber; 12-yin rotor bearing chamber; 13-slide valve oil chamber; 14-first exhaust chamber; 15-second exhaust chamber; 16-exhaust port;

20-oil barrel; 21-oil barrel vent; 30-oil filter structure.

detailed description

The technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts, All fall within the scope of protection of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", The orientation or positional relationship of the "top", "bottom", "inside", "outside" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and a simplified description, rather than indicating or implying The device or component referred to must have a particular orientation, is constructed and operated in a particular orientation, and thus is not to be construed as limiting the scope of the invention.

2-5, a schematic view of an exhaust bearing housing provided by the present invention. In the exemplary embodiment, the exhaust bearing housing 10 includes a male rotor bearing chamber 11, a female rotor bearing chamber 12, and a spool valve. Oil chamber 13 and exhaust chamber. The exhaust chamber is configured to have a plurality of turning structures, the exhaust gas flow can be redirected multiple times in the exhaust chamber, and finally discharged from the exhaust port 16, the exhaust gas flow changing the flow direction multiple times in the exhaust chamber, the impingement row The inner wall of the air chamber can improve the oil efficiency, and the multiple changes of the flow direction of the exhaust gas flow can help reduce vibration and noise, and play the role of vibration and noise reduction.

The opening of the exhaust port 16 is disposed such that, in the case where the exhaust bearing housing is housed in the housing, the gas discharged from the exhaust port 16 has a rotational flow along the inner wall of the housing and around the axis of the housing. Component. After the exhaust gas flow is exhausted from the exhaust port 16, the inertial action and the restriction of the casing, the exhaust gas flow will move circumferentially along the inner wall of the casing, capable of uniform flow field, and under the action of centrifugal force during the circular motion Larger oil droplets in the exhaust gas stream are trapped on the wall of the housing, thus acting as an oil component.

Optionally, the opening of the exhaust port 16 is in the radial direction of the spool oil chamber 13 and its opening is oriented in a circumferential direction substantially coaxial with the oil drum 20 so that the exhaust gas flow is exhausted from the exhaust port 16 The inertia of the circular motion is made around the axis of the oil barrel 20.

The exhaust bearing housing 10 provided by the invention plays the role of improving the oil separation efficiency from at least three aspects of centrifugal action, uniform flow field and impact separation.

As shown in FIG. 3, the exhaust chamber may include a first exhaust chamber 14 and a second exhaust chamber 15, which are disposed along the axial direction of the spool oil chamber 13 on the exhaust bearing housing 10, The two exhaust chambers 15 communicate with the first exhaust chamber 14, and the second exhaust chamber 15 is provided with an exhaust port 16 to facilitate the discharge of the exhaust gas stream. The second exhaust chamber 15 is configured to have a plurality of turning structures, and the exhaust gas flows in the axial direction through the first exhaust chamber 14 to change direction to flow into the second exhaust chamber 15, and in the second exhaust chamber 15 Under the action of the turning structure, the exhaust gas flow can be redirected multiple times in the second exhaust chamber 15 and finally discharged from the exhaust port 16.

One or more of the turning structures in the second exhaust chamber 15 may be provided, and an illustrative embodiment in which a turning structure is provided in the second exhaust chamber 15 is exemplified below.

As shown in FIGS. 6 and 7, in a preferred or alternative embodiment, the second exhaust chamber 15 includes a first chamber disposed along a radial direction of the spool oil chamber 13 and an axis along the spool oil chamber 13. To the disposed second chamber, there is a turning structure between the first chamber and the second chamber, the first chamber communicates with the first exhaust chamber 14 and the second chamber, and the exhaust gas flows through the axial direction An exhaust chamber 14 then flows radially into the first chamber, then axially into the second chamber, and finally flows out again through the exhaust port 16.

The exhaust bearing housing provided in this embodiment has at least two major features: First, the orientation of the exhaust port 16 can promote the exhaust gas flow to have a component of rotational flow along the inner wall of the housing and around the axis of the housing, or the opening specific It is a radial opening; the second is to guide the exhaust gas flow to produce a total of three flow direction transitions, as follows:

First, the exhaust gas flow enters the exhaust bearing housing, the flow direction is along the axial direction of the spool oil chamber 13, and then, due to the blockage of the bottom wall surface of the spool oil chamber 13, the steering flows in the radial direction of the spool oil chamber 13 to occur first. Change in the direction of secondary flow;

As shown in FIG. 6, after the radial flow, due to the blocking of the turning structure in the exhaust chamber, the flow path of the second exhaust chamber 15 entering the axial direction undergoes a second change in the flow direction, and the direction changes from the radial direction. In the axial direction, a change in the direction of the second flow occurs;

As shown in Fig. 7, finally, in the second exhaust chamber 15, the flow from the axial direction becomes a radial flow, and the exhaust port 16 is discharged, and a change in the third flow direction occurs.

In the above embodiment, the change of the flow direction helps to reduce the vibration and noise, and plays the role of vibration reduction and noise reduction, and the exhaust air flow is exhausted after the exhaust port 16 is exhausted during the circular motion. The larger oil droplets in the airflow are smashed onto the wall of the casing, thereby acting as an oil component and improving the efficiency of the oil.

Since the side portions of the spool oil chamber 13 and the anode rotor bearing chamber 11 are relatively larger in the axial direction, the second exhaust chamber 15 can be disposed on the exhaust bearing housing 10 in the spool oil chamber 13 and the anode One side of the rotor bearing cavity 11.

Alternatively, in order to make the airflow discharged from the exhaust port 16 more uniformly move in the inner circumference of the casing, the spool oil chamber 13 and the side of the anode rotor bearing chamber 11 on the exhaust bearing housing 10, and the exhaust bearing housing 10 A second exhaust chamber 15 is provided on one side of the spool oil chamber 13 and the cathode rotor bearing chamber 12.

Further, the exhaust port 16 on each of the second exhaust chambers 15 is disposed such that, in the case where the exhaust bearing housing 10 is housed in the housing, the exhaust gas flow can be promoted along the inner wall of the housing and around the housing. The axis of the rotation move.

In summary, the exhaust bearing housing 10 of the present invention has an exhaust chamber capable of changing the direction of rotation of the exhaust gas flow a plurality of times, and the opening of the exhaust port 16 enables the air flow to move circumferentially along the housing, from the centrifugal action, The oil flow efficiency is improved in various aspects such as uniform flow field, impact separation, etc., and the exhaust bearing housing 10 provided by the present invention is easy to cast and machine, and the use advantage is improved without increasing the cost.

The exhaust bearing housing 10 provided by the present invention can be applied to a screw compressor.

As shown in FIG. 8 and FIG. 9, in an exemplary embodiment of the screw compressor provided by the present invention, the screw compressor includes an oil sub-tank 20, and further includes an exhaust bearing housing 10 in any of the above embodiments, and the oil sub-tank 20 The exhaust bearing housing 10 is covered. An oil filter structure 30 is disposed in the oil barrel 20, and the exhaust gas stream is discharged through the exhaust port 16, filtered by the oil filter structure 30, and discharged from the oil barrel discharge port 21 provided in the oil tank 20.

In the above embodiment, the exhaust bearing housing 10 is located in the oil sub-tank 20, the rearward travel of the exhaust bearing housing 10 is the oil sub-filter structure 30, and the oil sub-filter structure 30 is provided with the oil sub-tank exhaust port 21. After the refrigerant is discharged from the exhaust bearing housing 10, it is filtered by the oil-separating filter structure 30, and then discharged from the oil-tank exhaust port 21.

The refrigerant gas is first discharged through the exhaust port 16 of the exhaust bearing housing 10, and under the action of inertia and the oil subtank 20, the refrigerant will move circumferentially along the inner wall of the oil sub-tank 20. During the circular motion, a large oil droplet in the refrigerant gas is sucked onto the wall surface of the oil barrel 20 by the centrifugal force, thereby functioning as an oil component, which is similar to the spinning mechanism for separating the oil droplets.

After centrifuging the oil droplets, the refrigerant is further passed through the oil filtration structure 30 to separate the smaller oil droplets. Compared with the exhaust bearing housing 10 in the prior art, the radial exhaust makes the refrigerant flow thread lengthen, the flow field is more uniformly mixed, and the parameters are more uniform; under the same pressure, flow rate, temperature and the like, the flow rate is uniform. The oil is more efficient.

In the above embodiment, the oil filter structure 30 may be an oil filter or the like.

The screw compressor provided by the present invention can be applied to an air conditioning unit.

In an exemplary embodiment of the air conditioning unit provided by the present invention, the air conditioning unit includes the above-described screw compressor, and the screw compressor includes the exhaust bearing housing 10 provided by the present invention. Therefore, the air conditioning unit and the screw compressor provided by the present invention correspond to each other. The advantageous effects of the exhaust bearing housing 10 provided by the present invention are provided.

In the description of the present invention, it is to be understood that the use of the terms "first", "second" and the like to define a component is merely for the purpose of facilitating the distinction between the above components. Meaning, Therefore, it should not be construed as limiting the scope of the invention.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to be limiting; although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that The invention is not limited to the spirit of the technical solutions of the present invention, and should be included in the scope of the technical solutions claimed in the present invention.

Claims

An exhaust bearing housing includes an exhaust chamber having an exhaust port (16), wherein the exhaust chamber is configured to have a plurality of turning structures, and the exhaust gas flow is at The direction of the exhaust chamber can be changed multiple times, and finally discharged from the exhaust port (16), the opening of the exhaust port (16) is disposed such that the exhaust bearing housing is housed in the housing In the case, the gas discharged from the exhaust port (16) has a component that rotates along the inner wall of the casing and around the axis of the casing.
The exhaust bearing housing according to claim 1, wherein the opening of the exhaust port (16) faces in a radial direction of the spool oil chamber (13) on the exhaust bearing housing.
The exhaust bearing housing according to claim 2, wherein said exhaust chamber includes a first exhaust chamber (14) and a second exhaust chamber (15) that communicate with each other, said first exhaust chamber (14) Arranged along the axial direction of the spool oil chamber (13), the second exhaust chamber (15) is configured to have a plurality of turning structures.
The exhaust bearing housing according to claim 3, wherein said second exhaust chamber (15) includes a first chamber disposed along a radial direction of said spool oil chamber (13) and along said a second chamber disposed axially of the spool valve oil chamber (13), the first chamber communicates with the first exhaust chamber (14) and the second chamber, and the exhaust gas flow flows in the axial direction The first exhaust chamber (14) then flows radially into the first chamber, then axially into the second chamber, and finally flows out again through the exhaust port (16).
The exhaust bearing housing according to claim 3, wherein said second exhaust chamber (15) is disposed on said exhaust bearing housing for a spool oil chamber (13) and a male rotor bearing chamber (11) One side.
The exhaust bearing housing according to claim 3, wherein: a spool valve oil chamber (13) on the exhaust bearing housing and a side of the anode rotor bearing chamber (11), and the exhaust bearing housing The second exhaust chamber (15) is disposed on one side of the upper spool oil chamber (13) and the female rotor bearing chamber (12).
The exhaust bearing housing according to claim 6, wherein said exhaust port (16) on each of said second exhaust chambers (15) is disposed such that said exhaust bearing housing is covered Provided in the housing, the exhaust gas flow can be promoted to rotate along the inner wall of the housing and around the axis of the housing.
A screw compressor comprising an oil sub-bottle (20), characterized by further comprising an exhaust bearing housing (10) according to any one of claims 1-7, said oil sub-barrel (20) The air bearing housing (10) is covered.
The screw compressor according to claim 8, wherein the oil sub-tank (20) is provided with an oil filtering structure (30), and after the exhaust airflow is discharged through the exhaust port (16), After the oil filter structure (30) is filtered, it is discharged from the oil barrel discharge port (21) provided on the oil tank (20).
An air conditioning unit comprising the screw compressor according to claim 8 or 9.