CN206290410U - Oil supply system for compressor and compressor assembly having same - Google Patents

Abstract

The utility model discloses an oil feeding system for compressor and compressor unit spare that has it. The compressor includes a bearing assembly having an oil inlet hole and an oil return hole, and an oil supply system including: the oil tank comprises an oil tank inlet and an oil tank outlet, and the oil tank inlet is suitable for being communicated with the oil return hole; the pump body comprises a liquid inlet and a liquid outlet, and the outlet of the oil tank is communicated with the liquid inlet; hydraulic pressure accumulator, hydraulic pressure accumulator include casing and piston, inject in the casing and hold the chamber, and the piston is movably established and is holding the intracavity and will hold the chamber and separate into first cavity and second cavity, and first cavity includes the opening of fuel feeding business turn over, and arbitrary two in liquid outlet, opening and the inlet port all switch on, are equipped with spring and second cavity in the second cavity and are suitable for intercommunication pressure balance chamber. According to the utility model discloses oil feeding system, when emergency power off, hydraulic pressure accumulator can provide the required lubricating oil of motor inertial motion to shut down in-process bearing assembly for the compressor.

Description

Oil supply system for compressor and compressor assembly having same

technical field

The utility model relates to the technical field of refrigeration, in particular to an oil supply system for a compressor and a compressor assembly with the oil supply system.

Background technique

During the operation of the compressor, the bearing needs to be lubricated continuously with lubricating oil to protect the compressor bearing from damage and increase the service life of the compressor. Lubricating oil is generally pumped through the pump body. When the power supply of the unit is interrupted unexpectedly, the motor of the compressor will continue to run for a period of time due to inertia before it can be completely stopped, and the pump body cannot work during this period, resulting in no bearings during the process. Lubricating oil lubrication, serious bearing wear, bearing life is greatly reduced.

In related technologies, a high-level oil tank is usually installed inside the compressor, and lubricating oil is stored in the oil tank. When the power is cut off in an emergency, the lubricating oil enters the bearing by gravity to lubricate the bearing; or a UPS emergency power supply device is added to the pump body. When the power is on, the UPS can continuously supply power to the pump body, so as to ensure the short-term oil supply of the unit. However, the high-level oil tank needs to be placed on the top of the compressor, which will cause certain restrictions on the volume and layout of the compressor, and increase the complexity of the overall structure of the compressor; UPS emergency power supply devices have high requirements for waterproofing and environmental protection, and in During use, there is a problem of power attenuation, and it needs to be replaced regularly, resulting in a high production cost of the compressor.

Utility model content

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the utility model proposes an oil supply system for a compressor. The oil supply system is simple in structure, low in cost and high in reliability. Provide the bearing assembly with the lubricating oil required by the bearing assembly during the inertial movement of the motor to stop, improve the reliability of the bearing assembly, reduce the wear of the bearing assembly, and prolong the service life of the bearing assembly.

The utility model also proposes a compressor assembly having the above-mentioned oil supply system for the compressor.

According to the oil supply system for a compressor according to the embodiment of the first aspect of the utility model, the compressor includes a bearing assembly, and the bearing assembly has a mechanism for supplying oil into the interior of the bearing assembly to lubricate the bearing assembly. An oil hole and an oil return hole for the oil inside the bearing assembly to flow out, the oil supply system includes: an oil tank, the oil tank includes an oil tank inlet and an oil tank outlet, and the oil tank inlet is suitable for conducting with the oil return hole; a pump body, the pump body includes a liquid inlet and a liquid outlet, and the outlet of the fuel tank communicates with the liquid inlet; a hydraulic accumulator, the hydraulic accumulator is suitable for being arranged between the liquid outlet and the liquid outlet Between the oil inlet holes, the hydraulic accumulator includes a housing and a piston, the housing defines an accommodation chamber, the piston is movably arranged in the accommodation chamber and divides the accommodation chamber into a second A chamber and a second chamber, the first chamber includes an opening for supplying oil in and out, any two of the liquid outlet, the opening and the oil inlet hole are connected, and the second chamber A spring is provided in the chamber and the second chamber is adapted to communicate with the pressure balance chamber,

When the system is in a normal energized state, the pump body works normally, and the pressure value in the pressure balance chamber is lower than the pressure value at the liquid outlet,

When the system suddenly loses power, the pump body stops working, the bearing assembly is still in the inertial running state, and the pressure value in the pressure balance chamber is equal to the pressure value at the liquid outlet.

According to the oil supply system for the compressor according to the embodiment of the utility model, a hydraulic accumulator is set between the liquid outlet and the oil inlet hole, and the second chamber of the hydraulic accumulator communicates with the pressure balance chamber, the pump When the body is working normally, a certain amount of lubricating oil can be stored in the hydraulic accumulator. When the pump body stops working in an emergency power failure, the hydraulic accumulator can provide the compressor with the energy required by the bearing assembly during the inertial movement of the motor to stop. Lubricating oil improves the reliability of the bearing assembly, reduces the wear of the bearing assembly, and prolongs the service life of the bearing assembly. In addition, by setting a hydraulic accumulator in the oil supply system, the oil supply pressure of the bearing assembly is more stable, and the lubrication effect of the bearing assembly is better. The oil supply system for the compressor in the embodiment of the utility model has the advantages of simple structure, low cost and high operation reliability.

In addition, the oil supply system for the compressor according to the embodiment of the present utility model may also have the following additional technical features:

According to some embodiments of the present utility model, the pressure balance chamber is an inner chamber of an oil tank.

According to some embodiments of the present invention, the oil supply system for the compressor further includes a one-way valve connected between the liquid outlet and the hydraulic accumulator and between the The liquid outlet is unidirectionally connected in the direction of the hydraulic accumulator.

According to some embodiments of the present utility model, a first on-off valve is provided at the opening to control the on-off between the opening and the liquid outlet and the on-off between the opening and the oil inlet hole .

According to some embodiments of the present invention, the oil supply system for the compressor further includes a cooling device, the cooling device includes a first cooling port and a second cooling port for oil supply, and the first cooling port is connected to the The liquid outlet is connected, and the second cooling port is connected to the opening of the hydraulic accumulator.

According to some embodiments of the present utility model, a second on-off valve is provided between the liquid outlet and the first cooling port to control the on-off between the liquid outlet and the first cooling port.

According to some embodiments of the present utility model, a filtering device is provided between the hydraulic accumulator and the oil inlet hole.

According to some embodiments of the present utility model, a third on-off valve is provided between the filter device and the oil inlet hole to control the connection between the filter device and the oil inlet hole.

According to some embodiments of the present utility model, a fourth on-off valve is provided between the oil return hole and the inlet of the oil tank to control the on-off between the oil return hole and the inlet of the oil tank.

The compressor assembly according to the embodiment of the second aspect of the utility model includes: a compressor; an oil supply system for the compressor, the oil supply system for the compressor is according to the above-mentioned embodiment of the first aspect of the utility model An oil supply system for a compressor, the oil supply system being connected to the compressor.

According to the compressor assembly of the embodiment of the utility model, by setting the oil supply system for the compressor according to the embodiment of the first aspect of the utility model, the reliability of the compressor assembly is higher and the operation is more stable.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic structural view of a compressor assembly according to a first embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a compressor according to a second embodiment of the present invention.

Reference signs:

Fuel tank 1; fuel tank inlet 11; fuel tank outlet 12;

Pump body 2; Liquid inlet 21; Liquid outlet 22;

Hydraulic accumulator 3; shell 31; housing chamber 311; first chamber 3111; second chamber 3112; piston 32; opening 301; first opening 3011; second opening 3012; pressure balance port 302; pressure balance pipe 303;

cooling device 4; first cooling port 41; second cooling port 42;

Filtration device 5;

One-way valve 6; first on-off valve 7; second on-off valve 8; third on-off valve 9; fourth on-off valve 10;

Compressor 100; bearing assembly 101; oil inlet hole 1011; oil return hole 1012.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The oil supply system for the compressor 100 according to the embodiment of the first aspect of the present utility model is described below with reference to FIG. 1. The compressor 100 includes a bearing assembly 101. An oil inlet hole 1011 for lubrication and an oil return hole 1012 for the oil inside the bearing assembly 101 to flow out. It should be noted here that the bearing assembly 101 may include a bearing and a shaft.

As shown in FIG. 1 , an oil supply system for a compressor 100 according to an embodiment of the present utility model includes: an oil tank 1 , a pump body 2 and a hydraulic accumulator 3 .

The fuel tank 1 includes a fuel tank inlet 11 and a fuel tank outlet 12. The fuel tank inlet 11 is suitable for conducting with the oil return hole 1012. The pump body 2 includes a liquid inlet 21 and a liquid outlet 22. The fuel tank outlet 12 is connected to the liquid inlet 21. Hydraulic pressure The accumulator 3 is adapted to be arranged between the liquid outlet 22 and the oil inlet hole 1011. The hydraulic accumulator 3 includes a housing 31 and a piston 32. The housing 31 defines an accommodating chamber 311. The piston 32 is movably arranged in the The housing chamber 311 is divided into a first chamber 3111 and a second chamber 3112, the first chamber 3111 includes an opening 301 for oil supply, the liquid outlet 22, the opening 301 and the oil inlet hole 1011 Any two are connected, that is to say, the liquid outlet 22 is connected to the opening 301, the liquid outlet 22 is connected to the oil inlet hole 1011, and the opening 301 is also connected to the oil inlet hole 1011. In the second chamber 3112 A spring is provided, one end of the spring is in contact with the piston 32, and the other end is in contact with the wall of the second chamber 3112, and the second chamber 3112 is provided with a spring and the second chamber 3112 is suitable for communicating with the pressure balance chamber. When the system is in a normal energized state, when the pump body 2 is working normally, the pressure value in the pressure balance chamber is lower than the pressure value at the liquid outlet 22. When the system is suddenly powered off, the pump body 2 stops working, and the bearing assembly 101 is still in inertia. In the running state, the pressure value in the pressure balance chamber is equal to the pressure value of the liquid outlet 22 .

It should be noted here that the lubricating oil enters the compressor 100 to lubricate the bearing assembly 101, and the lubricating oil will be mixed with some gaseous refrigerant. The "pressure value" mentioned in this application is the gaseous state in the oil supply system. The pressure value of the refrigerant.

When the system is powered normally, the pump body 2 works normally, the lubricating oil in the oil tank 1 is pumped out through the pump body 2, and the second chamber 3112 is connected to the pressure balance chamber. At this time, the pressure value in the pressure balance chamber is lower than the liquid outlet The pressure value at 22, that is, the pressure value in the second chamber 3112 is lower than the pressure value at the liquid outlet 22. At this time, a part of the lubricating oil flowing out from the liquid outlet 22 can enter the hydraulic accumulator 3 through the opening 301. The first chamber 3111 is stored in the first chamber 3111, a part of lubricating oil enters the bearing assembly 101 through the oil inlet hole 1011 to lubricate the bearing assembly 101, and the lubricating oil after lubricating the bearing assembly 101 passes through the oil return hole 1012 flows out of the bearing assembly 101 and then returns to the oil tank 1 through the oil tank inlet 11. In this way, the lubricating oil continuously lubricates the bearing assembly 101, and at the same time, the lubricating oil is continuously stored in the first chamber 3111 of the hydraulic accumulator 3. The amount of lubricant in the first chamber 3111 gradually increases, the piston 32 moves towards the direction of the second chamber 3112, the spring in the second chamber 3112 is also gradually compressed, and the compression of the spring will store a certain amount of compression energy or potential energy , and generate pressure toward the first chamber 3111 on the piston 32, when the pressure on both sides of the piston 32 reaches balance, the piston 32 reaches a balanced state, and the hydraulic accumulator 3 is full of lubricating oil at this time, and the fluid outlet 22 The lubricating oil flowing out no longer enters the hydraulic accumulator 3, but all enters the bearing assembly 101 to lubricate the bearing assembly 101.

When an emergency power failure occurs in the system, the pump body 2 stops working, and the bearing assembly 101 is still in the state of inertial operation. Here, the oil supply of the bearing assembly 101 in the state of inertial operation can be divided into three stages:

The first stage: the moment when the pump body 2 stops working, the pressure value in the pipeline between the liquid outlet 22 and the hydraulic accumulator 3 in the system decreases at this time, and the pressure between the hydraulic accumulator 3 and the oil inlet hole 1011 decreases. The pressure value in the pipeline is basically unchanged (still at the high pressure side), the pressure value in the pipeline between the bearing assembly 101 and the oil tank 1 is also basically unchanged (still at the low pressure side), the hydraulic accumulator 3 to the inlet The lubricating oil in the pipeline between the oil holes 1011 enters the bearing assembly 101 through the oil inlet hole 1011 to lubricate the bearing assembly 101;

The second stage: With the oil supply of the bearing assembly 101 in the first stage, the lubricating oil in the pipeline between the hydraulic accumulator 3 and the oil inlet hole 1011 will decrease, and the pressure value in the pipeline will also decrease. Will reduce, now the spring in the second chamber 3112 of the hydraulic accumulator 3 will release the compression energy or potential energy, and now the lubricating oil in the first chamber 3111 of the hydraulic accumulator 3 will be in the spring And the pressure of the pressure balance chamber is released into the system pipeline to replenish lubricating oil in the system pipeline, so as to ensure that the pressure value in the pipeline between the hydraulic accumulator 3 and the oil inlet hole 1011 is still greater than that of the bearing assembly 101 to the pressure value in the pipeline between the oil tank 1, so as to ensure the normal lubrication of the bearing assembly 101;

The third stage: With the oil supply of the second stage of the bearing assembly 101, the compression energy or potential energy stored by the spring is continuously reduced, while the pressure value in the bearing assembly 101 is continuously increasing, and at the same time due to the second chamber 3112 The pressure balance chamber is connected, and the pressure value in the pressure balance chamber is equal to the pressure value at the liquid outlet 22. At this time, the pressure value at the liquid outlet 22 is approximately equal to the pressure value in the inner cavity of the oil tank 1 and the bearing assembly 101, that is, That is to say, at this time, the pressure value in the pressure balance chamber is equal to the pressure value in the oil tank 1 or the bearing assembly 101, the pressure value in the second chamber 3112 and the pressure value in the bearing assembly 101 increase synchronously, and the second chamber The pressure value in 3112 can balance the pressure value in the bearing assembly 101. At this time, the compression energy or potential energy stored in the spring can continue to be released until the compression energy or potential energy of the spring is reduced to zero. After the spring releases the compression energy or potential energy During the process, the piston 32 continuously moves toward the first chamber 3111 , and the lubricating oil stored in the first chamber 3111 can be continuously released toward the system pipeline to ensure continuous lubrication of the bearing assembly 101 .

It is conceivable that by connecting the second chamber 3112 to the pressure balance chamber, the pressure balance chamber can balance the pressure value in the bearing assembly 101, so that the lubricating oil stored in the hydraulic accumulator 3 can be completely released, ensuring that the bearing assembly 101 For continuous lubrication during inertial operation, if there is no pressure balance chamber communicating with the second chamber 3112 in the system, the oil supply of the bearing assembly 101 can only be carried out to the second stage, when the pressure value in the bearing assembly 101 increases To a certain extent, the energy stored in the hydraulic accumulator 3 cannot continue to be released, resulting in a short lubrication time of the bearing assembly 101 and poor lubrication effect of the bearing assembly 101 .

In addition, setting the hydraulic accumulator 3 between the liquid outlet 22 and the oil inlet hole 1011 can also adjust the oil pressure in the oil supply system. Specifically, when the oil pressure in the system pipeline is high, the hydraulic accumulator 3 will suck lubricating oil to reduce the oil pressure in the system pipeline; when the oil pressure in the system pipeline is small, the hydraulic energy storage The device 3 will discharge lubricating oil into the system pipeline to increase the oil pressure in the system pipeline, and the hydraulic accumulator 3 can adjust the oil pressure in the system pipeline to make the oil supply pressure of the bearing assembly 101 more stable. Avoid excessive or too small amount of lubricating oil in the bearing assembly 101, and the lubricating effect of the bearing assembly 101 is better.

According to the oil supply system for the compressor 100 according to the embodiment of the present utility model, a hydraulic accumulator 3 is provided between the liquid outlet 22 and the oil inlet hole 1011, and the second chamber 3112 of the hydraulic accumulator 3 communicates In the pressure balance chamber, when the pump body 2 is working normally, a certain amount of lubricating oil can be stored in the hydraulic accumulator 3, and when the system has an emergency power failure and the pump body 2 stops working, the hydraulic accumulator 3 can provide the motor for the compressor 100. The lubricating oil required by the bearing assembly 101 during inertial motion to shutdown improves the reliability of the bearing assembly 101, reduces the wear of the bearing assembly 101, and prolongs the service life of the bearing assembly 101. In addition, by setting the hydraulic accumulator 3 in the oil supply system, the oil supply pressure of the bearing assembly 101 is more stable, and the lubrication effect of the bearing assembly 101 is better. The oil supply system for the compressor 100 in the embodiment of the utility model has the advantages of simple structure, low cost and high operation reliability.

As shown in Figures 1-2, the hydraulic accumulator 3 is provided with a pressure balance port 302 communicating with the second chamber 3112, and the pressure balance port 302 is provided with a pressure balance pipe 303 for communicating with the pressure balance chamber. The balance tube 303 is connected to the pressure balance chamber to realize the communication between the pressure balance chamber and the second chamber 3112, and the connection is flexible and convenient.

In some embodiments of the present utility model, the pressure balance chamber is the inner cavity of the fuel tank 1, that is to say, the second chamber 3112 communicates with the inner cavity of the fuel tank 1. When the system is in a normal power-on state, the pump body 2 works normally and the fuel tank The pressure value in the inner cavity of 1 is lower than the pressure value at the liquid outlet 22. When the system suddenly loses power, the pump body 2 stops working, the bearing assembly 101 is still in the state of inertial operation, and the pressure value in the inner cavity of the oil tank 1 is equal to the liquid outlet The pressure value at 22 is used to balance the pressure in the second chamber 3112 through the oil tank 1 to ensure that when the pump body 2 is working normally, a certain amount of lubricating oil can be stored in the hydraulic accumulator 3, and the pump body can be powered off in an emergency 2. When the operation is stopped, the hydraulic accumulator 3 can provide the compressor 100 with the lubricating oil required by the bearing assembly 101 during the inertial movement of the motor to the shutdown process. Of course, the present application is not limited thereto, and the pressure balance chamber may also be a low-pressure chamber of a compressor or the like.

In other embodiments of the present invention, when the compressor is applied to a refrigeration system, the refrigeration system includes a compressor, an evaporator, a throttling device and a condenser connected end to end in sequence, and the second chamber of the hydraulic accumulator 3 3112 can also communicate with the evaporator, and the pressure value in the evaporator is roughly equal to the pressure value in the bearing assembly 101. At this time, it can also be ensured that when the pump body 2 works normally, the pressure value in the second chamber 3112 is lower than that of the liquid outlet. The pressure value at the port 22, when the pump body 2 stops working, the pressure value in the second chamber 3112 is equal to the pressure value at the liquid outlet 22, and the connection of the oil supply system is more diversified.

In one embodiment of the present invention, as shown in FIG. 1, only one opening 301 of the first chamber 3111 may be provided, and the lubricant in the system may enter the first chamber 3111 through the opening 301, while the first chamber The lubricating oil in the chamber 3111 can also flow out of the first chamber 3111 through the opening 301, that is to say, the opening 301 can be used as both the inlet and the outlet of the lubricating oil, and the hydraulic accumulator 3 has a simple structure. Easy system connection.

In another embodiment of the present utility model, as shown in FIG. 2 , multiple openings 301 of the first chamber 3111 can be provided, for example, two as shown in FIG. 2 , which are the first opening 3011 and the second opening respectively. 3012, wherein the first opening 3011 communicates with the liquid outlet 22, the second opening 3012 communicates with the oil inlet hole 1011, the lubricating oil in the system enters the first chamber 3111 through the first opening 3011, and the first chamber 3111 The lubricating oil can flow into the system again through the first opening 3011 and the second opening 3012, the structural design of the hydraulic accumulator 3 is more diversified, and the system connection is more flexible and convenient.

In some embodiments of the present utility model, as shown in FIG. 1 , the oil supply system further includes a one-way valve 6 connected between the liquid outlet 22 and the hydraulic accumulator 3 and at the outlet 22 One-way conduction in the direction of the hydraulic accumulator 3, that is, the liquid outlet 22 and the hydraulic accumulator 3 are connected through the one-way valve 6, and the system pipeline can only be directed towards the hydraulic accumulator at the liquid outlet 22. The hydraulic accumulator 3 is turned on in the direction of the hydraulic accumulator 3, and the hydraulic accumulator 3 is disconnected towards the liquid outlet 22, so that when the system is powered off, the lubricating oil in the hydraulic accumulator 3 flows out of the hydraulic accumulator 3 and will all enter the bearing assembly 101. The bearing assembly 101 is lubricated and will not return to the oil tank 1, so that when the system is powered off, the lubrication effect of the bearing assembly 101 is better.

In some embodiments of the present utility model, as shown in FIG. 1 , a first on-off valve 7 is provided at the opening 301 of the hydraulic accumulator 3 to control the on-off between the opening 301 and the liquid outlet 22 and to control the opening 301 The on-off connection with the oil inlet hole 1011 can facilitate the maintenance of the system. Specifically, when the system works normally, the first on-off valve 7 is opened, and the opening 301 of the hydraulic accumulator 3 is connected to the liquid outlet 22, and the opening 301 of the hydraulic accumulator 3 is connected to the oil inlet hole 1011. conduction; when the system breaks down or needs to be replaced or cleaned, the first on-off valve 7 is closed, and the opening 301 of the hydraulic accumulator 3 is disconnected from the liquid outlet 22, and the opening of the hydraulic accumulator 3 The opening 301 is disconnected from the oil inlet hole 1011. At this time, the lubricating oil in the hydraulic accumulator 3 cannot flow into the system pipeline, and the lubricating oil in the system pipeline cannot enter the hydraulic accumulator 3, so that the maintenance of the system can be facilitated . Optionally, the first on-off valve 7 may be a cut-off valve, which has high reliability and low cost.

In some embodiments of the present invention, as shown in FIG. 1 , the oil supply system for the compressor 100 further includes a cooling device 4 , and the cooling device 4 includes a first cooling port 41 and a second cooling port 42 for oil supply. , the first cooling port 41 is in communication with the liquid outlet 22 , and the second cooling port 42 is in communication with the opening 301 of the hydraulic accumulator 3 . By installing a cooling device 4 between the liquid outlet 22 and the opening 301 of the hydraulic accumulator 3, the lubricating oil pumped out by the pump body 2 first enters the cooling device 4 after being cooled, and then enters the hydraulic accumulator 3 for storage and storage. Enter the bearing assembly 101 to lubricate the bearing assembly 101. The lubricating oil after cooling lubricates the bearing assembly 101, and it also plays a role in cooling the bearing assembly 101, avoiding the high temperature of the bearing assembly 101 when it works for a long time. If it is too high, the bearing bush will be burnt, so that the reliability and service life of the bearing assembly 101 can be further improved.

Further, as shown in FIG. 1, a second on-off valve 8 is provided between the liquid outlet 22 and the first cooling port 41 to control the on-off between the liquid outlet 22 and the first cooling port 41, so that the system can be facilitated. overhaul. Specifically, when the system works normally, the second on-off valve 8 is opened, and the liquid outlet 22 is connected to the first cooling port 41; when the system breaks down or needs to be replaced or cleaned, the second on-off valve 8 Closed, the liquid outlet 22 is disconnected from the first cooling port 41, so that the maintenance of the system can be facilitated. Optionally, the second on-off valve 8 may be a cut-off valve, which has high reliability and low cost.

In some embodiments of the present utility model, as shown in Figure 1, a filter device 5 is provided between the hydraulic accumulator 3 and the oil inlet hole 1011, and the lubricating oil in the system pipeline will be filtered by the filter device 5 first. Then enter the bearing assembly 101 to lubricate the bearing assembly 101, which can prevent the bearing assembly 101 from being mixed with impurities and cause damage to the bearing assembly 101, thereby further improving the reliability and service life of the bearing assembly 101.

Preferably, as shown in FIG. 1 , a third on-off valve 9 may be provided between the filter device 5 and the oil inlet 1011 to control the on-off between the filter device 5 and the oil inlet 1011 , so as to facilitate system maintenance. Specifically, when the system works normally, the third on-off valve 9 is opened, and the filter device 5 is connected to the oil inlet hole 1011; when the system fails or the system device needs to be replaced or cleaned, the third on-off valve 9 is closed, The filter device 5 is disconnected from the oil inlet hole 1011, so that the maintenance of the system can be facilitated. Optionally, the third on-off valve 9 may be a cut-off valve, which has high reliability and low cost.

In some embodiments of the present invention, as shown in FIG. 1 , a fourth on-off valve 10 may be provided between the oil return hole 1012 and the oil tank inlet 11 to control the on-off between the oil return hole 1012 and the oil tank inlet 11 . Specifically, when the system is working normally, the fourth on-off valve 10 is opened, and the oil return hole 1012 is connected to the oil tank inlet 11; when the system fails or the system device needs to be replaced or cleaned, the fourth on-off valve 10 is closed, The oil return hole 1012 is disconnected from the oil tank inlet 11, so that the maintenance of the system can be facilitated. Optionally, the fourth on-off valve 10 may be a cut-off valve, which has high reliability and low cost.

The compressor 100 assembly according to the second aspect of the utility model includes the compressor 100 and the oil supply system for the compressor 100 according to the first aspect of the utility model, and the oil supply system is connected to the compressor 100 . The compressor 100 may be a centrifugal compressor, but of course the present application is not limited thereto.

Specifically, the compressor 100 includes a bearing assembly 101, the bearing assembly 101 has an oil inlet hole 1011 through which oil is supplied into the inside of the bearing assembly 101 to lubricate the bearing assembly 101 and an oil return hole 1012 for the oil inside the bearing assembly 101 to flow out, and the oil tank The inlet 11 is connected to the oil return hole 1012, the oil tank outlet 12 is connected to the liquid inlet 21, the hydraulic accumulator 3 is arranged between the liquid outlet 22 and the oil inlet 1011, the liquid outlet 22, the opening 301 and the oil inlet Any two of the holes 1011 are conductive.

According to the compressor 100 assembly of the embodiment of the utility model, by setting the oil supply system for the compressor 100 according to the above-mentioned first aspect embodiment of the utility model, the reliability of the compressor 100 assembly is higher and the operation is more stable .

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation Specific features, structures, materials or characteristics described in an embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (10)

1. a kind of oil supply system for compressor, it is characterised in that the compressor includes bearing assembly, the bearing assembly With fuel feeding into inside the bearing assembly with the fuel feed hole that is lubricated to the bearing assembly and for inside bearing assembly Oil outflow spill port, the oil supply system includes：

Fuel tank, the fuel tank includes fuel tank import and fuel-tank outlet, and the fuel tank import is suitable to be turned on the spill port；

The pump housing, the pump housing includes inlet and liquid outlet, and the fuel-tank outlet is turned on the inlet；

Hydraulic energy storage device, the hydraulic energy storage device is suitable to be located between the liquid outlet and the fuel feed hole, the hydraulic accumulation energy Device includes housing and piston, and accommodating chamber is limited in the housing, and the piston is movably arranged in the accommodating chamber and will The accommodating chamber is separated into first chamber and second chamber, and the first chamber includes the opening of fuel feeding turnover, the liquid outlet, Any two in the opening and the fuel feed hole is both turned on, and spring is provided with the second chamber and the second chamber is suitable In connection pressure balance chamber,

When system is in normal power-up state, the pump housing normal work, the pressure value in the pressure balance chamber is less than institute The pressure value at liquid outlet is stated,

When system is powered off suddenly, the pump housing is stopped, and the bearing assembly is still in coasting state, the pressure Pressure value in counter balance pocket is equal to the pressure value at the liquid outlet.

2. the oil supply system for compressor according to claim 1, it is characterised in that the pressure balance chamber is fuel tank Inner chamber.

3. the oil supply system for compressor according to claim 1, it is characterised in that also including check valve, the list It is connected between the liquid outlet and the hydraulic energy storage device and in the liquid outlet towards the side of the hydraulic energy storage device to valve Upward one-way conduction.

4. the oil supply system for compressor according to any one of claim 1-3, it is characterised in that at the opening The first on-off valve is provided with to control the break-make and the control opening and the fuel feed hole between the opening and the liquid outlet Between break-make.

5. the oil supply system for compressor according to claim 1, it is characterised in that described also including cooling device Cooling device includes the first cooling port of fuel feeding turnover and the second cooling port, the first cooling port and the liquid outlet Conducting, the second cooling port turns on the opening of the hydraulic energy storage device.

6. the oil supply system for compressor according to claim 5, it is characterised in that the liquid outlet and described first The second on-off valve is provided between cooling port to control the break-make between the liquid outlet and the first cooling port.

7. the oil supply system for compressor according to claim 1, it is characterised in that the hydraulic energy storage device with it is described Filter is provided between fuel feed hole.

8. the oil supply system for compressor according to claim 7, it is characterised in that the filter and it is described enter The 3rd on-off valve is provided between oilhole to control the break-make between the filter and the fuel feed hole.

9. the oil supply system for compressor according to claim 1, it is characterised in that the spill port and the fuel tank The 4th on-off valve is provided between import to control the break-make between the spill port and the fuel tank import.

10. a kind of compressor assembly, it is characterised in that including：

Compressor；

The oil supply system for compressor according to any one of claim 1-9, the oil supply system and the compression Machine is connected.