CN210637284U - Structure for reducing efficiency attenuation of gas compressor - Google Patents

Abstract

The utility model provides a structure for reducing compressor efficiency attenuation, relates to and reduces compressor efficiency attenuation technical field, includes the compressor casing, is equipped with the cooling passageway that is linked together with the oil transportation passageway of middle shell in the compressor casing. The utility model solves the problem that the supercharger in the traditional technology can not be cooled because the external high temperature is isolated; or a cooling medium is introduced and limited by the medium characteristics, so that the efficiency attenuation of the compressor is increased in a part of the period; and the design structure is complicated, which is contrary to the modern compact space layout concept.

Description

Structure for reducing efficiency attenuation of gas compressor

Technical Field

The utility model relates to a reduce compressor efficiency decay technical field, concretely relates to structure for reducing compressor efficiency decay.

Background

With the improvement of the power density and the strength of the engine, the technical index of the turbocharger is continuously strengthened, and the turbocharger with higher performance is required to be equipped. After the normal supercharger is used for a period of time, the lubricating oil on the surface of the compressor shell forms a thicker particle coking surface. Wall surface loss is generated, airflow flow is influenced, and the efficiency of the compressor is reduced.

With the increasing of the power per liter of the engine, the pressure ratio of the supercharger is increased, and the temperature after pressing is close to the reliable use temperature of the cast aluminum material. How to ensure the reliability of the product also becomes a problem which needs to be solved urgently. Meanwhile, with the increase of the pressure ratio requirement, the pressure after pressing is also synchronously increased, so that the temperature after pressing is increased, and the air density is reduced. Aiming at the supercharger after a period of engine bench test, measuring the loss of the air flow on the wall surface of the pressure shell, so that the power loss of the compressor shell reaches more than 3%; one qualified supercharger should meet the requirement of power increase, and simultaneously, the temperature of the supercharger should not rise rapidly along with the power, so that the stability of the efficiency output of the supercharger can be ensured.

The intellectual property office of China discloses a patent with patent number 201721131017.6, and this patent is including separating the heat exchanger, separates the heat exchanger parcel outside turbo charger compressor casing, separates the heat exchanger and includes intermediate level and skin, and the intermediate level uses the high temperature resistant silicon adhesive tape of elasticity, and the skin sets up outside the intermediate level. The utility model discloses can wrap up closely outside turbo charger compressor casing, for turbo charger compressor casing provides temperature monitoring, thermal-insulated and cooling triple function, improve the security of turbo charger and compressor, prolong its life.

However, after analysis, the device utilizes the heat shield to separate external heat, so as to prolong the service life, but the structure causes the volume of the supercharger to be too large, does not utilize the application of modern compact space layout, has limited application range, cannot reduce the heat transmitted by the heat conduction of the supercharger body and gather the heat generated by the supercharger body, and cannot be dissipated outside.

The intellectual property office of the chinese country discloses a patent No. 201720740227.9, which includes a transmission system cooling air inlet pipe, a transmission system cooling air pipe, and a compressor air inlet pipe. One end of a cooling air pipe of a transmission system is connected with an air inlet pipe of the compressor, the other end of the cooling air pipe of the transmission system is connected with the transmission system, negative pressure is generated in the air inlet pipe of the compressor when the centrifugal supercharger works, and therefore a large amount of hot air in the transmission system enters the air inlet pipe of the compressor through the cooling air pipe of the transmission system under the action of the negative pressure, and heat is taken away to achieve the effect of cooling the supercharger. The utility model also discloses a centrifugal supercharger of having above-mentioned from inhaling air cooling system. The utility model discloses a from inhaling air cooling system can realize the effect for the booster cooling, and from inhaling air cooling system simple structure, realize easily, effectively prolonged centrifugal booster's life-span.

After analysis, a large amount of hot air in the transmission system enters the air inlet pipe of the air compressor through the transmission system cooling air pipe under the action of negative pressure, so that heat is taken away to achieve the effect of cooling the supercharger. However, hot air at the vortex end is brought into the compressor shell, so that the heat of the compressor part is increased, and the temperature of the compressor is increased; and gas cooling is very limited, with a small heat exchange coefficient, which is obviously not applicable.

The intellectual property office of China discloses a patent with patent number 201120513707.4, which comprises an outer shell, a sealing ring and an inner shell, wherein the outer shell is provided with a water inlet and a water outlet, and the inner shell is provided with an open annular water tank, an annular boss and an annular sealing boss which are not communicated. The sealing ring is arranged on an annular sealing boss on the inner shell, the inner shell is arranged at the inner end of the air inlet hole of the outer shell, the open end of an annular water tank on the inner shell is contacted with the inner end surface of the air inlet hole on the outer shell to form an annular cooling water cavity, and the water inlet and the water outlet on the outer shell are respectively communicated with two ends of the annular cooling water cavity. The annular boss on the inner shell is forcibly pressed into the air inlet of the outer shell in an extruding mode until the sealing ring is pressed and deformed to achieve the sealing effect. The annular cooling water cavity is an annular cavity which is not communicated, the two ends of the annular cooling water cavity are respectively connected with the water inlet pipe and the water outlet pipe, heat is absorbed through the flowing of cooling water, the metal temperature of the aluminum compressor volute is firstly reduced, and then the purpose of reducing the gas temperature in the compressor volute is achieved through efficient heat exchange between metal and air.

However, after analysis, the cooling medium is water, which determines that a storage space and a transmission passage of the cooling medium must be ensured during engine design, so that the structure of the engine is more complicated, the occupied space is large, the flexibility of engine design is limited, the method is contrary to the application development route of modern compact space layout, and the cost of the whole engine is increased.

The water yield to letting in the pressure shell does not have control, gets into when being unfavorable for the control temperature of pressure shell temperature lower and presses the shell and can produce adverse effect to pressing the shell structure, and the temperature is higher then can not effectively cool down, reaches accurate effectual cooling effect, and the corruption of increase compressor casing can destroy the pressure shell structure even, causes the accident.

In summary, the patent No. 201721131017.6 is developed in a direction of isolating the influence of external heat on the supercharger, but also results in that the heat generated by the body cannot be dissipated by the heat shield; the patent No. 201720740227.9 is developed in a direction of how to use gas to transport heat generated by a supercharger, but the gas is influenced by characteristics of the gas, so that cooling is very limited, heat exchange coefficient is small, but hot air is brought into a compressor shell, heat of the compressor part is increased, and the compressor part is obviously not suitable for use; patent No. 201120513707.4 discloses how to cool by water cooling, but it is known that the supercharger has no structure using water, which makes the storage space and transmission path of the cooling medium need to be arranged, making the structure more complicated, contrary to the application development route of modern compact space layout; more importantly, the water temperature is difficult to control, the water can be gasified at 100 ℃, the working environment temperature of the engine is high, the noise is increased after the water is gasified, and the abrasion of the compressor shell is increased; how to realize the application development route meeting the compact spatial layout has the advantages that the heat of the compressor shell can be transported without influencing the working stability of the compressor, and the technical personnel in the field are always puzzled.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a structure for reducing the efficiency attenuation of a compressor, which is used for solving the problem that the supercharger in the traditional technology can isolate the external high temperature, so that the internal high temperature can not be cooled; or a cooling medium is introduced and limited by the medium characteristics, so that the efficiency attenuation of the compressor is increased in a part of the period; and the design structure is complicated, which is contrary to the modern compact space layout concept.

In order to solve the above problem, the utility model provides a following technical scheme:

a structure for reducing efficiency attenuation of a compressor comprises a compressor shell, wherein a cooling channel communicated with an oil delivery channel of a middle shell is arranged in the compressor shell.

As an improved scheme, an oil inlet channel and an oil return channel which are respectively communicated with the oil delivery channel are also arranged on the cooling channel.

As an improved scheme, the cooling channel is an annular channel which is arranged along the shape of the compressor shell.

As an improved scheme, a control mechanism used for controlling oil inlet flow according to different output powers of the compressor is installed on the oil inlet channel.

As a refinement, the control mechanism includes an actuator for controlling the size of the flow aperture of the oil inlet passage.

As an improved scheme, the executing component comprises an actuator arranged on the compressor shell, the sensing end of the actuator is connected with the air outlet channel of the compressor shell, and the control end of the actuator is connected with the oil inlet channel.

As an improved scheme, a screw is further installed in the oil inlet channel, a straight hole used for communicating the oil inlet channel is coaxially formed in the screw, and the control end of the actuator is used for controlling the opening and closing area of the straight hole by using a telescopic rod.

As an improvement, the oil return passage is connected to the oil recovery system together with the oil delivery passage through a communication member.

As an improved scheme, the oil conveying channel comprises an oil inlet channel and an oil return channel, the oil inlet channel is connected with the oil inlet channel, and the oil return channel is connected with the oil return channel.

As an improved scheme, the oil inlet channel is further provided with a communication channel, one end of the communication channel is connected with the oil inlet channel, and the other end of the communication channel is connected with the straight hole of the screw.

As an improved scheme, the communicating part comprises a three-way pipe and a compressor shell oil return joint, one end of the three-way pipe is connected with the oil return channel, one end of the compressor shell oil return joint is connected with the oil return channel, the other end of the compressor shell oil return joint is connected with one end of the three-way pipe, and the other end of the three-way pipe is connected with the oil recovery system.

As an improved scheme, a first sealing rubber ring is further installed on a channel used for installing the telescopic rod on the compressor shell, and the inner edge of the first sealing rubber ring is in friction contact with the peripheral wall of the telescopic rod.

As an improved scheme, a second sealing rubber ring is further installed between the communication channel and the screw.

As an improved scheme, a gasket is further installed on one side of the screw in parallel, and the telescopic rod is located between the gasket and the screw.

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

the high temperature generated by the compressor is reduced, heat cannot be radiated to the outside, the influence on peripheral parts is reduced, and the coking of the compressor shell is effectively reduced; the lubricating medium required by the supercharger is used as the cooling medium to cool the supercharger, the structure is simple, and an additional storage structure, a pipeline and a collection structure are not required to be provided for the cooling medium, so that the structure is simpler, the space occupation is low, and the compact type supercharger is fully attached to the modern compact space layout concept; the space outside the compressor is further saved through the cooling medium conveying channel arranged on the compressor shell; the structure is more miniaturized and compact; lubricating oil is used as a cooling medium, the boiling point of the lubricating oil is high, and compared with water and air, the lubricating oil is more stable and has high controllability, and the lubricating oil is stably cooled due to the self-stability characteristic; and the negative effect of efficiency attenuation on the compressor is avoided; according to the output power of the supercharger, the oil output is controlled by the actuator, the matching of the supercharger and the oil output is realized, the engine oil flow can be adjusted according to different working states of the supercharger, and the supercharger is suitable for different working conditions; the loss of the air flow on the wall surface of the shell is reduced, and the attenuation of the efficiency of the compressor is effectively reduced; the reduction of the temperature of the shell can effectively improve the reliability of the product. The temperature of the pressed products of the national six is close to the reliable use temperature of the cast aluminum material, and the temperature of the shell can be effectively reduced by adding the cooling structure; the control structure is added, so that engine oil is saved, and the effects of saving and protecting the environment are achieved; the limitation is small, and the application range is wide; the use and the maintenance are convenient; the structure is simple, and the service life is long; simple structure and stable operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the screw of the present invention;

in the figure: 1-compressor shell, 2-actuator, 3-screw, 4-middle shell oil return joint, 5-oil recovery system, 6-three-way pipe, 7-compressor shell oil return joint, 8-first sealing rubber ring, 9-second sealing rubber ring, 10-gasket, 11-oil inlet channel, 12-communication channel, 13-oil inlet channel, 14-oil return channel, 15-annular channel, 16-middle shell, 17-telescopic rod, 18-straight hole.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 and 2, the structure for reducing the efficiency attenuation of the compressor comprises a compressor shell 1, wherein a temperature reduction channel communicated with an oil delivery channel of an intermediate shell 16 is arranged in the compressor shell 1.

The cooling channel is also provided with an oil inlet channel 11 and an oil return channel which are respectively communicated with the oil delivery channel.

The cooling channel is an annular channel 15 which is arranged along the shape of the compressor shell 1.

And the oil inlet channel 11 is provided with a control mechanism for controlling oil inlet flow according to different output powers of the compressor.

The control mechanism includes an actuator to control the size of the flow aperture of the oil feed passage 11.

The execution part comprises an actuator 2 arranged on the compressor shell 1, the induction end of the actuator 2 is connected with the air outlet channel of the compressor shell 1, and the control end of the actuator 2 is connected with the oil inlet channel 11.

Wherein the actuator is a supercharger actuator.

The screw 3 is further installed in the oil inlet channel 11, a straight hole 18 used for being communicated with the oil inlet channel 11 is coaxially formed in the screw 3, and the control end of the actuator 2 is used for controlling the opening and closing area of the straight hole 18 through the telescopic rod 17.

The oil return passage is connected to the oil recovery system 5 together with the oil delivery passage through a communication member.

The oil delivery channel comprises an oil inlet channel 13 and an oil return channel 14, the oil inlet channel 11 is connected with the oil inlet channel 13, and the oil return channel is connected with the oil return channel 14.

The oil inlet channel 13 is further provided with a communication channel 12, one end of the communication channel 12 is connected with the oil inlet channel 13, and the other end of the communication channel is connected with a straight hole 18 of the screw 3.

The communicating part comprises a three-way pipe 6 and a compressor shell oil return joint 7, one end of the three-way pipe 6 is connected with an oil return channel 14, one end of the compressor shell oil return joint 7 is connected with the oil return channel, the other end of the compressor shell oil return joint is connected with one end of the three-way pipe 6, and the other end of the three-way pipe 6 is connected with the oil recovery system 5.

Still install first sealing rubber ring 8 on the passageway that is used for installing telescopic link 17 on the compressor case 1, the interior border of first sealing rubber ring 8 and telescopic link 17's perisporium frictional contact.

And a second sealing rubber ring 9 is also arranged between the communication channel 12 and the screw 3.

The gasket 10 is also mounted on one side of the screw 3 in parallel, and the telescopic rod 17 is located between the gasket 10 and the screw 3.

The middle shell 16 is also provided with a middle shell oil return joint 4, wherein the middle shell oil return joint 4 is connected with the oil return channel 14.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (10)

1. A structure for reducing compressor efficiency attenuation, characterized by: the compressor comprises a compressor shell (1), wherein a cooling channel communicated with an oil delivery channel of a middle shell (16) is arranged in the compressor shell (1).

2. A structure for reducing compressor efficiency attenuation as set forth in claim 1, wherein: and the cooling channel is also provided with an oil inlet channel (11) and an oil return channel which are respectively communicated with the oil delivery channel.

3. A structure for reducing compressor efficiency attenuation as set forth in claim 1, wherein: the cooling channel is an annular channel (15) which is arranged along with the compressor shell (1).

4. A structure for reducing compressor efficiency attenuation as set forth in claim 2, wherein: and the oil inlet channel (11) is provided with a control mechanism for controlling oil inlet flow according to different output powers of the compressor.

5. An arrangement for reducing compressor efficiency attenuation according to claim 4, wherein: the control mechanism comprises an actuating member for controlling the size of the flow aperture of the oil inlet passage (11).

6. An arrangement for reducing compressor efficiency attenuation according to claim 5, wherein: the actuating unit comprises an actuator (2) installed on the compressor casing (1), the sensing end of the actuator (2) is connected with the gas outlet channel of the compressor casing (1), and the control end of the actuator (2) is connected with the oil inlet channel (11).

7. An arrangement for reducing compressor efficiency attenuation according to claim 6, wherein: the oil inlet passage (11) is internally provided with a screw (3), the screw (3) is coaxially provided with a straight hole (18) used for communicating the oil inlet passage (11), and the control end of the actuator (2) is used for controlling the opening and closing area of the straight hole (18) by using a telescopic rod (17).

8. A structure for reducing compressor efficiency attenuation as set forth in claim 2, wherein: the oil return channel and the oil delivery channel are connected to an oil recovery system (5) through a communication component.

9. A structure for reducing compressor efficiency attenuation as set forth in claim 7, wherein: the oil delivery channel comprises an oil inlet channel (13) and an oil return channel (14), the oil inlet channel (11) is connected with the oil inlet channel (13), and the oil return channel is connected with the oil return channel (14).

10. A structure for reducing compressor efficiency attenuation as set forth in claim 9, wherein: the oil inlet channel (13) is further provided with a communication channel (12), one end of the communication channel (12) is connected with the oil inlet channel (13), and the other end of the communication channel is connected with a straight hole (18) of the screw (3).

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