A cooling water pump with a noise reduction structure

Abstract

The present invention relates to the technical field of cooling water pumps, and particularly relates to a cooling water pump with a noise reduction structure. It includes: a housing, the housing is communicated with a suction pipe and a discharge pipe; a mounting seat, fixedly connected to the housing, the mounting seat is rotatably connected with a rotating shaft, the rotating shaft is provided with a buffer part, the rotating shaft is spline-connected with a rear cover plate, the rear cover plate is fixedly connected with a first blade and a second blade, and the first blade is fixedly connected with a front cover plate; a sliding frame, slidably connected in the buffer part, the sliding frame is fixedly connected with a blocking block, and the rear cover plate is provided with a hole. The present invention conducts liquid diversion through the holes on the surface of the rear cover plate, thereby reducing the liquid impact force on the surface of the rear cover plate, reducing the probability that the liquid impacts the surface of the rear cover plate and forms a turbulence phenomenon after the power of the cooling system increases, reducing the generation of turbulence noise, and reducing the influence of the turbulence on the surface strength of the rear cover plate, thereby reducing the probability of damage to the rear cover plate and improving the service life of the rear cover plate.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling water pumps, and particularly relates to a cooling water pump with a noise reduction structure. Background Art

[0002] The main function of a cooling water pump is to absorb heat through a circulating cooling medium (such as water, ethylene glycol solution, etc.) to keep the equipment to be cooled within an appropriate working temperature range. The existing cooling water pump is connected to a cooling system and generally includes a housing, a mounting seat, a motor, an impeller, an inlet pipe, and an outlet pipe. The liquid flows through the inlet pipe to the center of the impeller, and then the impeller uses centrifugal force to throw the liquid out to the outlet pipe. However, the spline of the existing motor shaft is connected to the axis of the impeller. During the use of the cooling water pump, the cooling medium will continuously impact the connection between the impeller and the motor shaft. Once the power of the cooling system increases, the liquid impact force received at the connection between the impeller and the motor shaft will also increase synchronously. This will cause a turbulent flow phenomenon at the connection between the impeller and the motor shaft due to the too-fast liquid flow rate. Over time, not only will there be turbulent noise at the connection between the impeller and the motor shaft, affecting the external environment, but also the strength of the connection between the impeller and the motor shaft will be loosened or even damaged due to the impact of the liquid, thereby affecting the service life of the cooling water pump. Summary of the Invention

[0003] In order to overcome the above-mentioned drawbacks in the background, the present invention provides a cooling water pump with a noise reduction structure.

[0004] The technical solution of the present invention is as follows: A cooling water pump with a noise reduction structure includes:

[0005] A housing, the housing is communicated with a suction pipe and a discharge pipe;

[0006] A mounting seat, fixedly connected to the housing, the mounting seat rotatably connects a rotating shaft penetrating into the housing, the rotating shaft is driven by an output shaft of an external motor through an external coupling, the rotating shaft is provided with a buffer portion, the rotating shaft is spline-connected to a rear cover plate, and circumferentially distributed first blades and circumferentially distributed second blades are respectively fixedly connected to both sides of the rear cover plate. All the first blades commonly fixedly connect a front cover plate on the side away from the rear cover plate;

[0007] A sliding frame, slidably connected to the buffer portion, a first elastic member is fixedly connected between the sliding frame and the buffer portion, the sliding frame is fixedly connected with circumferentially distributed plugging blocks having the same number as the first blades, all the first blades and all the plugging blocks are alternately and spaced apart, and the rear cover plate is provided with holes having the same number as the plugging blocks. The plugging blocks are used to plug adjacent holes on the rear cover plate.

[0008] Preferably, the buffer part is rotatably connected to the housing, and a gasket is used for sealing between the buffer part and the housing. The diameter of the buffer part is larger than that of the rotating shaft.

[0009] Preferably, all the holes on the rear cover plate are located near its axis to release the liquid pressure near the center of the rear cover plate.

[0010] Preferably, further included are:

[0011] A diversion block, which is slidably connected to the rotating shaft near the suction pipe. The maximum diameter of the diversion block is larger than the diameter of the connection between the rotating shaft and the rear cover plate.

[0012] Preferably, the diameter of the diversion block gradually increases from the position near the suction pipe to the position far away from it.

[0013] Preferably, further included are:

[0014] A seal, which is fixedly connected to the diversion block. The seal is made of an elastic material, and the side of the seal away from the diversion block is closely attached to the position on the rotating shaft near the rear cover plate.

[0015] Preferably, further included are:

[0016] A pressure sensor, which is installed on the rotating shaft and located inside the seal. A second elastic member is fixedly connected between the diversion block and the pressure sensor;

[0017] A regulating valve, which is installed on the discharge pipe to regulate the flow rate of the discharge pipe.

[0018] Preferably, further included are:

[0019] A sealing ring, which is fixedly connected to the sliding frame. There is a gap between the sealing ring and the buffer part. The sealing ring is made of a flexible material and is used for sealing the connection between the buffer part and the housing.

[0020] Preferably, further included are:

[0021] A sealing airbag, which is fixedly connected to the buffer part. The diameter of the sealing airbag gradually increases from the position near the rear cover plate to the position far away from it. The sealing airbag is rotatably connected to the housing, and a connecting part is arranged on the side of the mounting seat close to the housing.

[0022] Preferably, a chamber is arranged inside the buffer part. The first elastic member between the sliding frame and the buffer part is located inside the chamber. The sliding frame slides inside the chamber of the buffer part, and the chamber of the buffer part is communicated with the sealing airbag.

[0023] Compared with the prior art, the present invention has the following advantages: 1. The present invention diverts the liquid through the holes on the surface of the rear cover plate, thereby reducing the liquid impact force on the surface of the rear cover plate, decreasing the probability that the liquid impacts the surface of the rear cover plate and forms a turbulence phenomenon after the power of the cooling system increases, reducing the generation of turbulence noise, and reducing the impact of the turbulence on the surface strength of the rear cover plate, thereby reducing the probability of damage to the rear cover plate and increasing the service life of the rear cover plate;

[0024] 2. By blocking and guiding the liquid with the diversion block, the liquid no longer directly impacts the connection between the rotating shaft and the rear cover plate, so as to reduce the impact force of the liquid on the connection between the rotating shaft and the rear cover plate, decrease the probability of damage to the rotating shaft and the rear cover plate, and thus extend the life of the rotating shaft and the rear cover plate;

[0025] 3. The connection between the buffer part and the housing is adaptively sealed by the sealing airbag. The greater the liquid pressure received by the sliding frame, the larger the expansion volume of the sealing airbag, so as to prevent the sealing failure at the connection between the buffer part and the housing after the power of the cooling system increases, resulting in the leakage of liquid between the buffer part and the housing, and further affecting the working efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 2 is a three-dimensional structural sectional view of the housing and the mounting seat of the present invention;

[0028] Figure 3 is a three-dimensional structural schematic diagram of the first blade and the second blade of the present invention;

[0029] Figure 4 is a three-dimensional structural schematic diagram of the rear cover plate of the present invention;

[0030] Figure 5 is a three-dimensional structural schematic diagram of the sliding frame and the plugging block of the present invention;

[0031] Figure 6 is a three-dimensional structural schematic diagram of the connecting part of the present invention.

[0032] The labels in the figure are: 1 - housing, 101 - suction pipe, 102 - discharge pipe, 2 - mounting seat, 201 - rotating shaft, 2011 - buffer part, 202 - rear cover plate, 2021 - first blade, 2022 - second blade, 203 - front cover plate, 3 - sliding frame, 301 - plugging block, 4 - diversion block, 5 - seal, 6 - pressure sensor, 7 - regulating valve, 8 - sealing ring, 9 - sealing airbag, 10 - connecting part. DETAILED DESCRIPTION OF THE INVENTION

[0033] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0034] A cooling water pump with a noise reduction structure, such as Figures 1-5 As shown, it includes: a shell 1, the shell 1 is connected with a suction pipe 101 and a discharge pipe 102; a mounting seat 2, fixedly connected to the shell 1, the mounting seat 2 is rotatably connected with a rotating shaft 201 that penetrates into the shell 1, the rotating shaft 201 is driven by an external coupling and an output shaft of an external motor, the rotating shaft 201 is provided with a buffer portion 2011, the rotating shaft 201 is spline-connected with a rear cover plate 202, the two sides of the rear cover plate 202 are respectively fixed with circumferentially distributed first blades 2021 and circumferentially distributed second blades 2022, and the left sides of all the first blades 2021 are commonly fixed with a front cover plate 203; a sliding frame 3, slidably connected to the buffer portion 2011, a first elastic member is fixed between the sliding frame 3 and the buffer portion 2011, the sliding frame 3 is fixed with circumferentially distributed blocking blocks 301 and the same number as the first blades 2021, all the first blades 2021 and all the blocking blocks 301 are alternately spaced, and the rear cover The plate 202 is provided with the same number of holes as the blocking block 301. The blocking block 301 is used to block adjacent holes on the rear cover plate 202. The buffer part 2011 is rotatably connected to the shell 1. The buffer part 2011 and the shell 1 are sealed by a sealing gasket. The diameter of the buffer part 2011 is larger than the diameter of the rotating shaft 201. The original connection between the rotating shaft 201 and the shell 1 is changed to the connection between the buffer part 2011 and the shell 1, so that the connection is far away from the axis of the rear cover plate 202. The farther the position in the shell 1 is from the axis of the rear cover plate 202, the smaller the liquid pressure therein is, thereby reducing the liquid pressure at the connection between the buffer part 2011 and the shell 1, so as to reduce the probability of damage to the connection between the buffer part 2011 and the shell 1 and increase the service life of the device. All holes on the rear cover plate 202 are located near its axis, which is used to release the liquid pressure near the center of the circle of the rear cover plate 202.

[0035] Furthermore, a control terminal not shown in the figure is disposed outside the housing 1, and the external motor is electrically connected to the control terminal.

[0036] Furthermore, the distance between two adjacent first blades 2021 and the distance between two adjacent second blades 2022 gradually increase from the axis center to the edge of the rear cover plate 202, so that the liquid pressure at the axis center of the rear cover plate 202 is greater than the liquid pressure at the edge of the rear cover plate 202, thereby accelerating the speed at which the liquid flows from the axis center to the edge of the rear cover plate 202 and improving the working efficiency of the device.

[0037] Furthermore, the first elastic member between the sliding frame 3 and the buffer portion 2011 is a compression spring.

[0038] The specific working principle is as follows:

[0039] Before using this device, install the mounting base 2 on the right side of the housing 1.

[0040] When an operator needs to use this device to circulate the cooling medium (hereinafter referred to as liquid) in the cooling system, connect this device to the cooling system. During the use of this device, the operator turns on the external motor through the control terminal. The output shaft of the external motor drives the rotating shaft 201 to rotate through the external coupling. The rotating shaft 201 drives the rear cover plate 202 to rotate. The rear cover plate 202 drives all the first blades 2021 and all the second blades 2022 to rotate. The liquid is sucked into the housing 1 from the suction pipe 101 under the influence of the rotation of the rear cover plate 202. The liquid flows through the front cover plate 203, the middle of the rear cover plate 202 and all the first blades 2021 in sequence. At the same time, the liquid flows to the periphery of the housing 1 under the action of the centrifugal force generated by the rotation of all the first blades 2021. Then the liquid flows back to the cooling system through the discharge pipe 102.

[0041] When the liquid impacts the surface of the rear cover plate 202, if the power of the cooling system increases, resulting in an increase in the liquid pressure impacting the surface of the rear cover plate 202, all the plugging blocks 301 are pressed and jointly drive the sliding frame 3 to move to the right, causing the first elastic member between the sliding frame 3 and the buffer portion 2011 to contract. The holes on the surface of the rear cover plate 202 lose the plugging of the plugging blocks 301, and a part of the liquid flows through the holes of the rear cover plate 202 to the second blades 2022 (the rear cover plate 202 drives all the second blades 2022 to rotate, and the liquid flowing to the second blades 2022 flows to the periphery of the housing 1 under the action of the centrifugal force generated by the rotation of all the second blades 2022. Then the liquid flows back to the cooling system through the discharge pipe 102), thereby reducing the liquid impact force on the surface of the rear cover plate 202, reducing the probability of the liquid impacting the surface of the rear cover plate 202 and forming a turbulence phenomenon after the power of the cooling system increases, reducing the generation of turbulence noise, and reducing the impact of the turbulence on the surface strength of the rear cover plate 202, thereby reducing the probability of damage to the rear cover plate 202 and increasing the service life of the rear cover plate 202.

[0042] When the rotational speed of the output shaft of the external motor decreases, causing the rotational speed of the rotating shaft 201 to decrease and the power of the cooling system to decrease, the liquid pressure on the plugging blocks 301 decreases, and the first elastic member between the sliding frame 3 and the buffer portion 2011 gradually rebounds, causing the plugging blocks 301 to gradually move back to their original positions until the holes on the surface of the rear cover plate 202 are plugged again. When it is necessary to stop using this device, the operator turns off the external motor and the cooling system through the control terminal, so that the liquid no longer flows into the housing 1.

[0043] Such as Figure 2 、 Figure 3 And Figure 5As shown, it further includes: a flow guiding block 4, slidably connected to the rotating shaft 201 near the suction pipe 101. The maximum diameter of the flow guiding block 4 is greater than the diameter at the connection of the rotating shaft 201 and the rear cover plate 202. The diameter of the flow guiding block 4 gradually increases from the position near the suction pipe 101 to the position far away from it.

[0044] As Figure 3 with Figure 5 shown, it further includes: a seal 5, fixedly connected to the flow guiding block 4. The seal 5 is made of an elastic material, and the right side of the seal 5 closely adheres to the position on the rotating shaft 201 near the rear cover plate 202.

[0045] Furthermore, when the liquid enters the housing 1 from the suction pipe 101, the liquid is blocked by the flow guiding block 4 and diffuses around along its surface, so that the liquid no longer directly impacts the connection of the rotating shaft 201 and the rear cover plate 202, thereby reducing the impact force of the liquid on the connection of the rotating shaft 201 and the rear cover plate 202, decreasing the probability of damage to the rotating shaft 201 and the rear cover plate 202, and thus prolonging the service life of the rotating shaft 201 and the rear cover plate 202.

[0046] Furthermore, since the diameter of the flow guiding block 4 gradually increases from the position near the suction pipe 101 to the position far away from it, when the flow guiding block 4 moves to the right and squeezes the seal 5 to deform, the flow area between the flow guiding block 4 and the suction pipe 101 gradually increases. On the contrary, when the flow guiding block 4 moves to the left to reset, the flow area between the flow guiding block 4 and the suction pipe 101 gradually decreases.

[0047] As Figure 1 、 Figure 2 with Figure 5 shown, it further includes: a pressure sensor 6, installed on the rotating shaft 201 and located inside the seal 5. A second elastic member is fixedly connected between the flow guiding block 4 and the pressure sensor 6; a regulating valve 7, installed on the discharge pipe 102, for regulating the flow rate of the discharge pipe 102.

[0048] Furthermore, the pressure sensor 6 is electrically connected to the control terminal, and the regulating valve 7 is electrically connected to the control terminal. If the pressure received by the pressure sensor 6 changes, the pressure sensor 6 controls the opening of the regulating valve 7 through the control terminal to regulate the liquid flow rate of the regulating valve 7. When the pressure received by the pressure sensor 6 increases, the liquid flow rate of the regulating valve 7 increases synchronously. When the pressure received by the pressure sensor 6 decreases, the liquid flow rate of the regulating valve 7 decreases synchronously.

[0049] Furthermore, the second elastic member between the flow guiding block 4 and the pressure sensor 6 is a compression spring.

[0050] The specific working principle is as follows:

[0051] When the liquid enters the housing 1 from the suction pipe 101, the operator turns on the regulating valve 7 through the control terminal. The flow guide block 4 protects the rotating shaft 201 and the rear cover plate 202, so that the liquid no longer directly impacts the connection between the rotating shaft 201 and the rear cover plate 202. Moreover, the greater the liquid pressure on the flow guide block 4, the more the flow guide block 4 is compressed and moves to the right. The seal 5 is compressed and deformed and accumulates at the connection between the rotating shaft 201 and the rear cover plate 202, enhancing the sealing effect of the seal 5 between the rotating shaft 201 and the rear cover plate 202 to prevent the liquid from flowing into the space between the rotating shaft 201 and the rear cover plate 202, which may cause the connection between the rotating shaft 201 and the rear cover plate 202 to become loose or even disconnected, thus affecting the normal use of this device.

[0052] When the operator needs to increase the power of the cooling system, the operator controls the speed of the output shaft of the external motor to increase through the control terminal, so that the speeds of the rotating shaft 201, the rear cover plate 202, and all the first blades 2021 increase. Affected by the rotation of the rear cover plate 202, the liquid is sucked into the housing 1 from the suction pipe 101, and the liquid flow rate entering the suction pipe 101 increases. The flow guide block 4 is compressed and moves to the right (the rightward movement of the flow guide block 4 increases the flow area between the suction pipe 101 and the flow guide block 4). The flow guide block 4 presses its second elastic member, and the second elastic member presses the pressure sensor 6, causing the pressure on the pressure sensor 6 to increase. The pressure sensor 6 controls the flow rate of the regulating valve 7 through the control terminal, so that the liquid flow rate of the regulating valve 7 increases synchronously, and the liquid flow rate of the discharge pipe 102 increases synchronously, making the liquid flow rates in the discharge pipe 102 and the suction pipe 101 change synchronously, thereby preventing a liquid flow rate difference between the discharge pipe 102 and the suction pipe 101 and avoiding excessive pressure inside the housing 1 due to too much liquid entering the suction pipe 101, which may even cause the structural seal inside the housing 1 to fail.

[0053] When the operator needs to reduce the power of the cooling system, the operator controls the speed of the output shaft of the external motor to decrease through the control terminal, so that the speeds of the rotating shaft 201, the rear cover plate 202, and all the first blades 2021 decrease. The liquid flow rate entering the suction pipe 101 decreases, the pressure on the flow guide block 4 decreases, the seal 5 gradually rebounds, the second elastic member of the flow guide block 4 rebounds and drives it to move to the left, the pressure on the pressure sensor 6 decreases, and the liquid flow rate of the regulating valve 7 decreases, making the liquid flow rates in the discharge pipe 102 and the suction pipe 101 change synchronously, thereby preventing a liquid flow rate difference between the discharge pipe 102 and the suction pipe 101 and avoiding a situation where the flow area at the discharge pipe 102 and the suction pipe 101 is larger than the liquid flow rate, which may cause gas to appear inside the housing 1 or even cavitation, affecting the service life of this device. When it is necessary to stop using this device, the operator turns off the pressure sensor 6, the regulating valve 7, and the cooling system through the control terminal, and the liquid no longer flows into the housing 1, causing the second elastic member, the flow guide block 4, and the seal 5 of the flow guide block 4 to all move back to their original positions.

[0054] As shown Figure 3 and Figure 4 shown, it further includes: a sealing ring 8, fixedly connected to the sliding frame 3. There is a gap between the sealing ring 8 and the buffer portion 2011. The sealing ring 8 is made of a flexible material and is used to seal the connection between the buffer portion 2011 and the housing 1.

[0055] Furthermore, when the liquid pressure is too high, the sliding frame 3 drives the sealing ring 8 to move until it contacts and gradually presses the buffer portion 2011. The greater the liquid pressure, the more the sliding frame 3 moves. The sealing ring 8 is compressed and deformed, strengthening the sealing effect between the buffer portion 2011 and the housing 1, preventing the liquid pressure from being too high and impacting the connection between the buffer portion 2011 and the housing 1, resulting in the sealing failure between the buffer portion 2011 and the housing 1.

[0056] As shown Figures 4-6 shown, it further includes: a sealing airbag 9, fixedly connected to the buffer portion 2011. The outer diameter of the sealing airbag 9 gradually increases from the vicinity of the rear cover plate 202 to the far side, so as to facilitate the insertion of the sealing airbag 9 into the housing 1. The sealing airbag 9 is rotatably connected to the housing 1. Since a sealing gasket needs to be inserted between the housing 1 and the mounting seat 2 for sealing, there needs to be a gap and an annular groove for storing the sealing airbag 9 between the housing 1 and the mounting seat 2. In this embodiment, the sealing airbag 9 replaces the sealing gasket between the housing 1 and the mounting seat 2 in the above embodiment. A connection port is provided on one side of the housing 1 close to the mounting seat 2 for the buffer portion 2011 and the connecting portion 10 to be inserted. The radius of the connection port on the rightmost side of the housing 1 for the buffer portion 2011 and the connecting portion 10 to be inserted is X, the radius of the buffer portion 2011 is Y, X > Y. A connecting portion 10 is provided on the left side of the mounting seat 2. The thickness of the connecting portion 10 is X - Y. The connecting portion 10 is used to fill the gap between the housing 1 and the buffer portion 2011. A chamber is provided in the buffer portion 2011. Both the chamber of the buffer portion 2011 and the sealing airbag 9 are filled with gas. The first elastic member between the sliding frame 3 and the buffer portion 2011 is located in the chamber of the buffer portion 2011. The sliding frame 3 slides in the chamber of the buffer portion 2011. The chamber of the buffer portion 2011 communicates with the sealing airbag 9. When the sliding frame 3 moves to the right, the gas in the chamber of the buffer portion 2011 is squeezed into the sealing airbag 9, causing the sealing airbag 9 to expand and enhancing the sealing effect of the sealing airbag 9 between the housing 1 and the buffer portion 2011.

[0057] The specific working principle is as follows:

[0058] When it is necessary to install the mounting base 2 on the right side of the housing 1, the operator inserts the mounting base 2, the connecting part 10 and the sealing airbag 9 into the right side of the housing 1. When the liquid pressure received by the sliding frame 3 increases, the sliding frame 3 squeezes its first elastic member to contract, and the sliding frame 3 squeezes the gas in the upper chamber of the buffer part 2011. The gas in the upper chamber of the buffer part 2011 is squeezed into the sealing airbag 9. The greater the liquid pressure received by the sliding frame 3, the greater the expansion volume of the sealing airbag 9, and the connection between the buffer part 2011 and the housing 1 is adaptively sealed to prevent the sealing failure at the connection between the buffer part 2011 and the housing 1 after the power of the cooling system increases, resulting in the leakage of liquid between the buffer part 2011 and the housing 1, thereby affecting the working efficiency of the device.

[0059] After the liquid pressure in the housing 1 decreases, the first elastic member of the sliding frame 3 rebounds and resets, and the sealing airbag 9 contracts and squeezes the gas therein into the upper chamber of the buffer part 2011.

[0060] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form. Any technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A cooling water pump with a noise reduction structure, characterized in that, Comprising: A housing (1), the housing (1) being connected to a suction pipe (101) and a discharge pipe (102); A mounting seat (2), fixedly connected to the housing (1), the mounting seat (2) being rotatably connected to a rotating shaft (201) penetrating into the housing (1), the rotating shaft (201) being driven by an output shaft of an external motor through an external coupling, the rotating shaft (201) being provided with a buffer portion (2011), the rotating shaft (201) being splined to a rear cover plate (202), both sides of the rear cover plate (202) being fixedly connected with circumferentially distributed first blades (2021) and circumferentially distributed second blades (2022), and a front cover plate (203) being fixedly connected to the side of all the first blades (2021) away from the rear cover plate (202); A sliding frame (3), slidably connected within the buffer portion (2011), a first elastic member being fixedly connected between the sliding frame (3) and the buffer portion (2011), the sliding frame (3) being fixedly connected with circumferentially distributed blocking blocks (301) having the same number as the first blades (2021), all the first blades (2021) and all the blocking blocks (301) being alternately and spacedly distributed, the rear cover plate (202) being provided with holes having the same number as the blocking blocks (301), and the blocking blocks (301) being used for blocking adjacent holes on the rear cover plate (202); The buffer portion (2011) is rotatably connected to the housing (1), and the diameter of the buffer portion (2011) is greater than the diameter of the rotating shaft (201); All the holes on the rear cover plate (202) are located at positions close to its axis, for releasing the liquid pressure near the center of the rear cover plate (202); Also comprising: A guide block (4), slidably connected to the rotating shaft (201) near the suction pipe (101), the maximum diameter of the guide block (4) being greater than the diameter at the connection of the rotating shaft (201) and the rear cover plate (202); The diameter of the guide block (4) gradually increases from the position near the suction pipe (101) to the position far away; Also comprising: A seal (5), fixedly connected to the guide block (4), the seal (5) being made of an elastic material, and the side of the seal (5) away from the guide block (4) being in close contact with the position on the rotating shaft (201) near the rear cover plate (202); Also comprising: A pressure sensor (6), installed on the rotating shaft (201) and located within the seal (5), a second elastic member being fixedly connected between the guide block (4) and the pressure sensor (6); A regulating valve (7), installed on the discharge pipe (102), for regulating the flow rate of the discharge pipe (102).

2. The cooling water pump with a noise reduction structure according to claim 1, wherein, The buffer portion (2011) and the housing (1) are sealed by a gasket.

3. The cooling water pump with a noise reduction structure according to claim 1, wherein, Also comprising: A sealing ring (8) is fixedly connected to the sliding frame (3). There is a gap between the sealing ring (8) and the buffer part (2011). The sealing ring (8) is made of a flexible material and is used to seal the connection between the buffer part (2011) and the housing (1).

4. The cooling water pump with a noise reduction structure according to claim 3, characterized in that, It further includes: A sealing airbag (9) is fixedly connected to the buffer part (2011). The diameter of the sealing airbag (9) gradually increases from the side close to the rear cover plate (202) to the side far away. The sealing airbag (9) is rotatably connected to the housing (1). A connecting part (10) is provided on one side of the mounting seat (2) close to the housing (1).

5. The coolant pump with a noise reduction structure according to claim 4, characterized in that, A chamber is provided in the buffer part (2011). The first elastic member between the sliding frame (3) and the buffer part (2011) is located in the chamber. The sliding frame (3) slides in the chamber of the buffer part (2011). The chamber of the buffer part (2011) is communicated with the sealing airbag (9).

Images