Oil pump with noise reduction device and automobile

Abstract

The utility model relates to the technical field of automobile noise reduction, and particularly discloses an oil pump with a noise reduction device and an automobile. The oil pump with the noise reduction device comprises an oil pump body and at least one noise reduction piece. Wherein an oil inlet, an oil duct and an oil outlet which are communicated in sequence are formed in the oil pump; the oil inlet is suitable for being externally connected with an oil pump oil distribution disc, the oil outlet is suitable for being externally connected with a steering oil pipe, and the oil duct is used for communicating the oil inlet with the oil outlet; the noise reduction part is arranged in the oil duct, a guide-in opening and a guide-out opening are formed in the noise reduction part, the guide-in opening communicates with the guide-out opening, the guide-in opening communicates with the oil inlet, and the guide-out opening communicates with the oil outlet; the section size of the lead-in opening is larger than or equal to that of the lead-out opening. The problem that a vane type steering oil pump can generate abnormal sound in the automobile starting work or automobile steering process can be solved.

Description

Technical Field

[0001] The present application belongs to the technical field of automobile noise reduction, and in particular relates to an oil pump and an automobile with a noise reduction device. Background Art

[0002] The automobile power steering system is mainly used to change or maintain the direction of the automobile's movement or reverse direction, so as to control the direction of the automobile according to the driver's wishes. Therefore, the stability of the automobile power steering system is crucial to the driving safety of the automobile.

[0003] The automobile power steering system is mainly composed of a steering oil pump, a steering control valve and an oil tank which are connected in sequence. The steering control valve can connect the working fluid pumped out by the steering oil pump with the oil tank to maintain the driving direction of the automobile.

[0004] In the related art, the steering oil pump mostly adopts a vane-type structure. Affected by the structure, processing accuracy, and assembly errors, the vane-type steering oil pump will produce abnormal noise when the car is started or the car is steering. Utility Model Content

[0005] The present application provides an oil pump and a car with a noise reduction device to solve the problem that a vane-type steering oil pump generates abnormal noise during the start-up of the car or the steering process of the car.

[0006] The technical solution adopted in this application is:

[0007] The utility model of the present application provides an oil pump with a noise reduction device, comprising:

[0008] The oil pump is formed with an oil inlet, an oil passage and an oil outlet which are connected in sequence; the oil inlet is suitable for connecting to an external oil pump oil distribution plate, the oil outlet is suitable for connecting to an external steering oil pipe, and the oil passage is used to connect the oil inlet and the oil outlet;

[0009] At least one noise reduction component is arranged in the oil passage, the noise reduction component is formed with an inlet and an outlet, the inlet and the outlet are connected; the inlet is connected with the oil inlet, and the outlet is connected with the oil outlet;

[0010] The cross-sectional size of the inlet is greater than or equal to the cross-sectional size of the outlet.

[0011] Optionally, the noise reduction member is formed with a first noise reduction portion and a second noise reduction portion connected in sequence;

[0012] The first noise reduction part is connected to the introduction port;

[0013] One end of the second noise reduction portion can be connected to the first noise reduction portion, and the other end of the second noise reduction portion can be connected to the outlet;

[0014] In the direction from the oil inlet to the oil outlet, the cross-sectional dimensions of the first noise reduction portion decrease sequentially;

[0015] The minimum cross-sectional dimension of the first noise reduction portion is greater than or equal to the maximum cross-sectional dimension of the second noise reduction portion.

[0016] Optionally, the noise reduction member is formed with a transition portion;

[0017] One end of the transition portion is connected to the first noise reduction portion, and the other end of the transition portion is connected to the second noise reduction portion;

[0018] The minimum cross-sectional dimension of the first noise reduction portion is greater than or equal to the maximum cross-sectional dimension of the transition portion; the maximum cross-sectional dimension of the second noise reduction portion is less than or equal to the minimum cross-sectional dimension of the transition portion.

[0019] Optionally, the straight line where the symmetry center of the first noise reduction portion is located is collinear with the straight line where the symmetry center of the second noise reduction portion is located;

[0020] And / or, the straight line where the symmetry center of the first noise reduction portion is located is collinear with the straight line where the symmetry center of the transition portion is located.

[0021] Optionally, also include:

[0022] A first fixing member is disposed in the oil passage;

[0023] A second fixing member is arranged on the noise reduction member;

[0024] The first fixing member and the second fixing member are fixedly connected to limit the relative movement between the noise reduction member and the oil channel.

[0025] Optionally, a plurality of noise reduction components are provided, and in the direction from the oil inlet to the oil outlet, the plurality of noise reduction components are arranged at intervals, and two adjacent noise reduction components are arranged in communication.

[0026] Optionally, in the direction from the oil inlet to the oil outlet, the cross-sectional dimension of the outlet of the previous noise reduction component is greater than or equal to the cross-sectional dimension of the inlet of the next noise reduction component.

[0027] Optionally, also include:

[0028] At least one flow channel, the flow channel is arranged on the noise reduction component, and the flow channel is communicated with the oil inlet and the oil outlet respectively;

[0029] The cross-sectional dimension of the flow channel is smaller than the cross-sectional dimension of the oil channel.

[0030] Optionally, a plurality of flow channels are provided, and in the direction from the oil inlet to the oil outlet, two adjacent flow channels are spaced apart.

[0031] A car comprises an oil pump with a noise reduction device.

[0032] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0033] 1. The embodiment of the present application provides an oil pump with a noise reduction device, comprising: an oil pump and at least one noise reduction component. The oil pump is formed with an oil inlet, an oil channel and an oil outlet which are connected in sequence; the oil inlet is suitable for an external oil pump oil distribution plate, the oil outlet is suitable for an external steering oil pipe, and the oil channel is used to connect the oil inlet and the oil outlet; the noise reduction component is arranged in the oil channel, the noise reduction component is formed with an inlet and an outlet, the inlet and the outlet are connected, the inlet is connected with the oil inlet, and the outlet is connected with the oil outlet; the cross-sectional size of the inlet is greater than or equal to the cross-sectional size of the outlet.

[0034] It should be noted that the working fluid can flow out from the oil pump distribution plate under the drive of external force, flow through the oil inlet and enter the oil channel, and flow out from the outlet after passing through the inlet. The working fluid flowing out of the outlet can be guided to the oil outlet through the oil channel and transported to the steering oil pipe.

[0035] In an oil pump with a noise reduction device provided in an embodiment of the present application, the working fluid entering from the oil inlet undergoes two types of attenuation in the oil channel and is finally directed to the oil outlet, thereby reducing the noise in the oil channel. One is to reduce the noise by causing a change in acoustic impedance due to a sudden change in the cross section at the connection between the oil channel and the noise reduction component, and the other is to reduce the noise by flowing from the oil channel with a large cross section into the inlet with a small cross section, and the energy moves to the high-frequency end as the cross section of the outlet decreases, and the high-frequency sound waves are more likely to attenuate during propagation, further enhancing the noise reduction effect, and the two types of noise reduction are performed in the same noise reduction component, which has the advantage of a simple structure.

[0036] 2. An embodiment of the present application provides an oil pump with a noise reduction device, wherein the noise reduction component is formed with a first noise reduction portion and a second noise reduction portion connected in sequence, wherein the first noise reduction portion is connected to the inlet; one end of the second noise reduction portion can be connected to the first noise reduction portion, and the other end of the second noise reduction portion can be connected to the outlet; in the direction from the oil inlet to the oil outlet, the cross-sectional size of the first noise reduction portion decreases in sequence; the minimum cross-sectional size of the first noise reduction portion is greater than or equal to the maximum cross-sectional size of the second noise reduction portion.

[0037] In an oil pump with a noise reduction device provided in an embodiment of the present application, the minimum cross-sectional dimension of the first noise reduction part is greater than or equal to the maximum cross-sectional dimension of the second noise reduction part. Driven by an external force, the working fluid flows through the first noise reduction part and enters the second noise reduction part. As the cross-sectional area of ​​the second noise reduction part decreases, the energy moves toward the high-frequency end, and the high-frequency sound waves are more easily attenuated during propagation, thereby silencing the working fluid entering the second noise reduction part.

[0038] 3. An embodiment of the present application provides an oil pump with a noise reduction device, wherein the noise reduction component is formed with a transition portion, one end of the transition portion is connected to a first noise reduction portion, and the other end of the transition portion is connected to a second noise reduction portion; the minimum cross-sectional dimension of the first noise reduction portion is greater than or equal to the maximum cross-sectional dimension of the transition portion; the maximum cross-sectional dimension of the second noise reduction portion is less than or equal to the minimum cross-sectional dimension of the transition portion.

[0039] In an oil pump with a noise reduction device provided in an embodiment of the present application, the minimum cross-sectional dimension of the first noise reduction portion is greater than or equal to the maximum cross-sectional dimension of the transition portion. Driven by an external force, the working fluid flows through the first noise reduction portion and then enters the transition portion. As the cross-sectional area of ​​the transition portion decreases, the energy moves toward the high-frequency end, and the high-frequency sound waves are more easily attenuated during propagation, thereby silencing the working fluid entering the transition portion.

[0040] The maximum cross-sectional dimension of the second noise reduction portion is less than or equal to the minimum cross-sectional dimension of the transition portion. Driven by external force, the working fluid flows through the transition portion and enters the second noise reduction portion. As the cross-sectional dimension of the second noise reduction portion decreases, the energy moves toward the high-frequency end. The high-frequency sound waves are more likely to attenuate during propagation, thereby silencing the working fluid entering the second noise reduction portion.

[0041] It can be understood that the transition portion and the second noise reduction portion can perform two silencing operations on the working fluid in the noise reduction component, which has the advantage of a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0043] Figure 1 A schematic diagram of the main structure of an oil pump with a noise reduction device provided in an embodiment of the present application;

[0044] Figure 2 A schematic diagram of the main structure of a noise reduction component of an oil pump with a noise reduction device provided in an embodiment of the present application;

[0045] Reference numerals:

[0046] 1- oil pump; 11- oil inlet; 12- oil channel; 13- oil outlet;

[0047] 2-noise reduction component; 21-inlet; 22-outlet; 23-first noise reduction part; 24-second noise reduction part; 25-transition part. DETAILED DESCRIPTION

[0048] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0050] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0051] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0053] Example 1

[0054] like Figure 1 As shown, an embodiment of the present application provides an oil pump with a noise reduction device, and the oil pump with a noise reduction device includes: an oil pump 1, the oil pump 1 is formed with an oil inlet 11, an oil channel 12 and an oil outlet 13 which are connected in sequence; the oil inlet 11 is suitable for an external oil distribution plate of the oil pump 1, the oil outlet 13 is suitable for an external steering oil pipe, and the oil channel 12 is used to connect the oil inlet 11 and the oil outlet 13.

[0055] It is understandable that the oil pump 1 contains working fluid, which can flow out of the oil distribution plate of the oil pump 1 under the drive of external force and flow through the oil inlet 11 into the oil channel 12, and then be guided to the oil outlet 13 after passing through the oil channel 12, and transported to the steering oil pipe.

[0056] like Figure 1 The oil pump with a noise reduction device provided in an embodiment of the present application also includes: at least one noise reduction component 2, the noise reduction component 2 is arranged in the oil channel 12, the noise reduction component 2 is formed with an inlet 21 and an outlet 22, the inlet 21 and the outlet 22 are connected, the inlet 21 is connected to the oil inlet 11, and the outlet 22 is connected to the oil outlet 13.

[0057] It should be noted that the working fluid can flow out from the oil distribution plate of the oil pump 1 under the drive of external force, flow through the oil inlet 11, enter the oil channel 12, and pass through the inlet 21 and flow out from the outlet 22. The working fluid flowing out of the outlet 22 can be guided to the oil outlet 13 after passing through the oil channel 12, and transported to the steering oil pipe.

[0058] It should be noted that the cross-sectional dimension of the inlet 21 is greater than or equal to the cross-sectional dimension of the outlet 22 .

[0059] It should be noted that the working fluid entering from the oil inlet 11 undergoes two types of attenuation in the oil passage 12 and is finally directed to the oil outlet 13, thereby reducing the noise in the oil passage 12. One is to reduce the noise by causing a change in acoustic impedance due to the sudden change in cross section at the connection between the oil passage 12 and the noise reduction component 2, and the other is to flow from the oil passage 12 with a large cross section into the inlet 21 with a small cross section, and the energy moves to the high-frequency end as the cross section of the outlet 22 decreases, and the high-frequency sound waves are more likely to attenuate during propagation, further enhancing the noise reduction effect, and the two types of noise reduction are performed in the same noise reduction component 2, which has the advantage of a simple structure.

[0060] Therefore, the oil pump with a noise reduction device provided in the embodiment of the present application can reduce the noise of the working fluid in the oil channel 12, thereby solving the problem that the oil pump 1 generates abnormal noise during the start-up of the car or the steering of the car.

[0061] like Figure 2 As shown, the noise reduction component 2 provided in the embodiment of the present application is formed with a first noise reduction portion 23 and a second noise reduction portion 24 connected in sequence, and the first noise reduction portion 23 is connected to the inlet 21; one end of the second noise reduction portion 24 can be connected to the first noise reduction portion 23, and the other end of the second noise reduction portion 24 can be connected to the outlet 22; in the direction from the oil inlet 11 to the oil outlet 13, the cross-sectional size of the first noise reduction portion 23 decreases successively; the minimum cross-sectional size of the first noise reduction portion 23 is greater than or equal to the maximum cross-sectional size of the second noise reduction portion 24.

[0062] It can be understood that the first noise reduction portion 23 is disposed on the noise reduction component 2 and is recessed toward the side close to the oil outlet 13 . In the direction from the oil inlet 11 to the oil outlet 13 , the first noise reduction portion 23 is extended in a contracted shape.

[0063] It should be noted that the first noise reduction portion 23 may be arranged in various shapes. The following will illustrate the arrangement shapes of the first noise reduction portion 23 in turn with examples.

[0064] In one embodiment, the first noise reduction portion 23 is arranged in a funnel shape, and the large diameter end of the funnel-shaped first noise reduction portion 23 is arranged near the oil inlet 11, and the small diameter end of the funnel-shaped first noise reduction portion 23 is arranged near the oil outlet 13.

[0065] In another embodiment, the first noise reduction portion 23 is arranged in an inverted triangle shape, and one end of the large cross-section of the first noise reduction portion 23 located in the inverted triangle is arranged close to the oil inlet 11, and one end of the small cross-section of the first noise reduction portion 23 located in the inverted triangle is arranged close to the oil outlet 13.

[0066] It is understandable that the specific shape of the first noise reduction portion 23 is not limited and can be selected according to actual use requirements. It only needs to ensure that the cross-sectional size of the first noise reduction portion 23 decreases sequentially in the direction from the oil inlet 11 to the oil outlet 13.

[0067] It should be noted that the sudden change in cross section of the first noise reduction portion 23 can cause a change in acoustic impedance, thereby silencing the working fluid entering the first noise reduction portion 23 .

[0068] It can be understood that the minimum cross-sectional size of the first noise reduction part 23 is greater than or equal to the maximum cross-sectional size of the second noise reduction part 24. The working fluid flows through the first noise reduction part 23 driven by external force and enters the second noise reduction part 24. The energy moves toward the high-frequency end as the cross-sectional size of the second noise reduction part 24 decreases. The high-frequency sound waves are more easily attenuated during propagation, thereby silencing the working fluid entering the second noise reduction part 24.

[0069] like Figure 2 As shown, the noise reduction component 2 provided in the embodiment of the present application is formed with a transition portion 25, one end of the transition portion 25 is connected to the first noise reduction portion 23, and the other end of the transition portion 25 is connected to the second noise reduction portion 24; the minimum cross-sectional dimension of the first noise reduction portion 23 is greater than or equal to the maximum cross-sectional dimension of the transition portion 25; the maximum cross-sectional dimension of the second noise reduction portion 24 is less than or equal to the minimum cross-sectional dimension of the transition portion 25.

[0070] It can be understood that the minimum cross-sectional dimension of the first noise reduction portion 23 is greater than or equal to the maximum cross-sectional dimension of the transition portion 25. The working fluid flows through the first noise reduction portion 23 driven by external force and enters the transition portion 25. The energy moves toward the high-frequency end as the cross-sectional dimension of the transition portion 25 decreases. The high-frequency sound waves are more likely to attenuate during propagation, thereby silencing the working fluid entering the transition portion 25.

[0071] It can be understood that the maximum cross-sectional dimension of the second noise reduction portion 24 is less than or equal to the minimum cross-sectional dimension of the transition portion 25. Driven by external force, the working fluid flows through the transition portion 25 and enters the second noise reduction portion 24. As the cross-sectional dimension of the second noise reduction portion 24 decreases, the energy moves toward the high-frequency end. The high-frequency sound waves are more easily attenuated during propagation, thereby silencing the working fluid entering the second noise reduction portion 24.

[0072] It should be noted that the transition portion 25 and the second noise reduction portion 24 can perform two silencing operations on the working fluid in the noise reduction component 2, which has the advantage of a simple structure.

[0073] It should be noted that, in the direction from the oil inlet 11 to the oil outlet 13, the first noise reduction portion 23, the transition portion 25 and the second noise reduction portion 24 are connected in sequence, and there are various positional relationships among the first noise reduction portion 23, the transition portion 25 and the second noise reduction portion 24, which are explained in turn by examples below.

[0074] In one embodiment, the straight line where the symmetry center of the first noise reduction portion 23 is located is collinear with the straight line where the symmetry center of the second noise reduction portion 24 is located.

[0075] It should be noted that the straight line where the symmetry center of the first noise reduction portion 23 is located is collinear with the straight line where the symmetry center of the second noise reduction portion 24 is located, which can reduce the flow length of the working fluid and thus increase the flow speed of the working fluid.

[0076] In another embodiment, the straight line where the symmetry center of the first noise reduction portion 23 is located is collinear with the straight line where the symmetry center of the transition portion 25 is located.

[0077] It should be noted that the straight line where the symmetry center of the first noise reduction portion 23 is located is collinear with the straight line where the symmetry center of the transition portion 25 is located, which can reduce the flow length of the working fluid and thus increase the flow speed of the working fluid.

[0078] In addition, in other feasible embodiments, the straight line where the symmetry center of the first noise reduction portion 23 is located is collinear with the straight line where the symmetry center of the second noise reduction portion 24 is located; and the straight line where the symmetry center of the first noise reduction portion 23 is located is collinear with the straight line where the symmetry center of the transition portion 25 is located, that is, the straight line where the symmetry center of the first noise reduction portion 23, the straight line where the symmetry center of the second noise reduction portion 24 is located, and the straight line where the symmetry center of the transition portion 25 is located are all collinear.

[0079] It should be noted that the straight line where the symmetry center of the first noise reduction portion 23, the straight line where the symmetry center of the second noise reduction portion 24, and the straight line where the symmetry center of the transition portion 25 are all collinear, which can reduce the flow length of the working fluid, thereby increasing the flow speed of the working fluid.

[0080] It is understandable that the positional relationship among the first noise reduction portion 23 , the transition portion 25 and the second noise reduction portion 24 is not limited and can be selected according to actual use requirements.

[0081] It should be noted that the first noise reduction portion 23 , the transition portion 25 , and the second noise reduction portion 24 may be provided in various shapes. The shapes of the first noise reduction portion 23 , the transition portion 25 , and the second noise reduction portion 24 are described below with examples.

[0082] In one embodiment, the first noise reduction portion 23 is conical, the transition portion 25 is cylindrical, and the second noise reduction portion 24 is cylindrical.

[0083] In another embodiment, the first noise reduction portion 23 is in the shape of a quadrangular pyramid, the transition section is in the shape of a cuboid, and the second noise reduction portion 24 is in the shape of a cuboid.

[0084] It is understandable that there is no limitation on the configuration shapes of the first noise reduction portion 23 , the transition portion 25 and the second noise reduction portion 24 , and they can be selected according to actual use requirements.

[0085] It should be noted that, when the first noise reduction portion 23 is conical, the transition portion 25 is cylindrical, and the second noise reduction portion 24 is cylindrical, the diameters of the first noise reduction portion 23, the transition portion 25, and the second noise reduction portion 24 are various. The diameters of the first noise reduction portion 23, the transition portion 25, and the second noise reduction portion 24 are exemplified below.

[0086] In one embodiment, the diameter of the first noise reduction portion 23 at the location of the maximum cross section is 2d, the diameter of the first noise reduction portion 23 at the location of the minimum cross section is 1.4d, the diameter of the transition portion 25 is 1.4d, and the diameter of the second noise reduction portion 24 is d.

[0087] In another embodiment, the diameter of the first noise reduction portion 23 at the location of the maximum cross section is 2.1d, the diameter of the first noise reduction portion 23 at the location of the minimum cross section is 1.5d, the diameter of the transition portion 25 is 1.5d, and the diameter of the second noise reduction portion 24 is d.

[0088] It is understandable that the diameters of the first noise reduction portion 23 , the transition portion 25 , and the second noise reduction portion 24 and the value of d are not limited and can be selected according to actual use requirements.

[0089] The oil pump with a noise reduction device provided in the embodiment of the present application further includes: a first fixing member and a second fixing member. The first fixing member is arranged in the oil passage 12, and the second fixing member is arranged on the noise reduction member 2; the first fixing member and the second fixing member are fixedly connected to limit the relative movement between the noise reduction member 2 and the oil passage 12.

[0090] It should be noted that there are many specific configurations between the first fixing member and the second fixing member. The configurations of the first fixing member and the second fixing member are described below with examples.

[0091] In one embodiment, the first fixing member is an internal thread, which is arranged on the inner wall of the oil channel 12, and the second fixing member is an external thread; the external thread is arranged on the outer wall of the noise reduction member 2, and the internal thread and the external thread are meshed and connected to limit the movement of the noise reduction member 2 relative to the oil channel 12.

[0092] In another embodiment, the first fixing member is a groove, which is arranged on the inner wall of the oil channel 12 , and the second fixing member is a limiting protrusion, and the groove and the limiting protrusion are arranged in cooperation to limit the movement of the noise reduction member 2 relative to the oil channel 12 .

[0093] It is understandable that the specific arrangement of the first fixing member and the second fixing member is not limited and can be selected according to actual use requirements. It is only necessary to ensure that the first fixing member and the second fixing member cooperate to limit the relative movement between the noise reduction member 2 and the oil channel 12.

[0094] In addition, in another feasible implementation, the noise reduction component 2 and the oil channel 12 are interference fit to reduce the movement of the noise reduction component 2 relative to the oil channel 12 under the pressure of the working fluid, thereby improving the connection stability between the noise reduction component 2 and the oil channel 12.

[0095] The embodiment of the present application provides a plurality of noise reduction components 2 , and in the direction from the oil inlet 11 to the oil outlet 13 , the plurality of noise reduction components 2 are arranged at intervals, and two adjacent noise reduction components 2 are arranged in communication.

[0096] It should be noted that, in the direction from the oil inlet 11 to the oil outlet 13 , the cross-sectional dimension of the outlet 22 of the previous noise reduction component 2 is greater than or equal to the cross-sectional dimension of the inlet 21 of the next noise reduction component 2 .

[0097] It can be understood that, driven by external force, the working fluid flows through the previous noise reduction component 2 and enters the next noise reduction component 2. As the cross-section of the next noise reduction component 2 decreases, the energy moves to the high-frequency end, and the high-frequency sound waves are more easily attenuated during propagation, thereby silencing the working fluid entering the next noise reduction component 2.

[0098] An oil pump with a noise reduction device provided in an embodiment of the present application also includes: at least one flow channel, the flow channel is arranged on the noise reduction component 2, and the flow channel is respectively connected to the oil inlet 11 and the oil outlet 13; the cross-sectional size of the flow channel is smaller than the cross-sectional size of the oil channel 12.

[0099] It should be noted that the working fluid entering from the oil inlet 11 undergoes two types of attenuation in the oil channel 12 and is finally directed to the oil outlet 13, thereby reducing the noise in the oil channel 12. One is to reduce the noise by causing a change in acoustic impedance through the sudden change in the cross section at the connection between the oil channel 12 and the flow channel, and the other is to flow from the oil channel 12 with a large cross section into the flow channel with a small cross section, and the energy moves to the high-frequency end as the cross section of the flow channel decreases, and the high-frequency sound waves are more likely to attenuate during propagation, further enhancing the noise reduction effect, and the two types of noise reduction are performed in the same noise reduction component 2, which has the advantage of a simple structure.

[0100] The embodiment of the present application provides a plurality of flow channels, which are arranged at intervals between two adjacent flow channels in the direction from the oil inlet 11 to the oil outlet 13 .

[0101] It should be noted that the cross-sectional dimensions of the plurality of flow passages are smaller than the cross-sectional dimension of the oil passage 12 .

[0102] It should be noted that the main body material of the noise reduction component 2 is made of high-strength structural steel and is processed using a heat treatment process of annealing and high-temperature tempering. The flow channel is processed using a boring process, and the surface roughness of the inner surface of the flow channel reaches 1.6.

[0103] Example 2

[0104] An embodiment of the present application provides a car, including an oil pump with a noise reduction device provided in Example 1.

[0105] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0106] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0107] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An oil pump with a noise reduction device, characterized in that: include: An oil pump, wherein the oil pump is formed with an oil inlet, an oil passage and an oil outlet which are connected in sequence; the oil inlet is suitable for being externally connected to an oil pump oil distribution plate, the oil outlet is suitable for being externally connected to a steering oil pipe, and the oil passage is used to connect the oil inlet and the oil outlet; At least one noise reduction member, the noise reduction member is arranged in the oil passage, the noise reduction member is formed with an inlet and an outlet, the inlet and the outlet are connected; the inlet is connected to the oil inlet, and the outlet is connected to the oil outlet; Wherein, the cross-sectional size of the inlet is greater than or equal to the cross-sectional size of the outlet.

2. The oil pump with a noise reduction device according to claim 1, characterized in that: The noise reduction member is formed with a first noise reduction portion and a second noise reduction portion connected in sequence; The first noise reduction portion is connected to the introduction port; One end of the second noise reduction portion can be connected to the first noise reduction portion, and the other end of the second noise reduction portion can be connected to the outlet; In the direction from the oil inlet to the oil outlet, the cross-sectional dimensions of the first noise reduction portion decrease sequentially; The minimum cross-sectional dimension of the first noise reduction portion is greater than or equal to the maximum cross-sectional dimension of the second noise reduction portion.

3. The oil pump with a noise reduction device according to claim 2, characterized in that: The noise reduction member is formed with a transition portion; One end of the transition portion is communicated with the first noise reduction portion, and the other end of the transition portion is communicated with the second noise reduction portion; The minimum cross-sectional dimension of the first noise reduction portion is greater than or equal to the maximum cross-sectional dimension of the transition portion; The maximum cross-sectional dimension of the second noise reduction portion is smaller than or equal to the minimum cross-sectional dimension of the transition portion.

4. The oil pump with a noise reduction device according to claim 3, characterized in that: The straight line where the symmetry center of the first noise reduction portion is located is collinear with the straight line where the symmetry center of the second noise reduction portion is located; And / or, the straight line on which the symmetry center of the first noise reduction portion is located is collinear with the straight line on which the symmetry center of the transition portion is located.

5. The oil pump with a noise reduction device according to claim 1, characterized in that: Also includes: a first fixing member, disposed in the oil passage; A second fixing member, disposed on the noise reduction member; The first fixing member and the second fixing member are fixedly connected to limit the relative movement between the noise reduction member and the oil channel.

6. The oil pump with a noise reduction device according to claim 1, characterized in that: There are multiple noise reduction components, and in the direction from the oil inlet to the oil outlet, the multiple noise reduction components are arranged at intervals, and two adjacent noise reduction components are connected.

7. The oil pump with a noise reduction device according to claim 6, characterized in that: In the direction from the oil inlet to the oil outlet, the cross-sectional dimension of the outlet of the previous noise reduction component is greater than or equal to the cross-sectional dimension of the inlet of the next noise reduction component.

8. The oil pump with a noise reduction device according to claim 1, characterized in that: Also includes: at least one flow channel, the flow channel being arranged on the noise reduction member and the flow channel being in communication with the oil inlet and the oil outlet respectively; The cross-sectional dimension of the flow channel is smaller than the cross-sectional dimension of the oil channel.

9. The oil pump with a noise reduction device according to claim 8, characterized in that: There are multiple flow channels, and they are arranged at intervals between two adjacent flow channels in the direction from the oil inlet to the oil outlet.

10. An automobile, characterized in that: An oil pump with a noise reduction device comprising any one of claims 1-9.

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