Adjustable coolant pump

Abstract

The utility model discloses an adjustable coolant pump, which relates to the technical field of coolant pumps, and aims to solve the problem that the temperature of the conventional coolant pump cannot be quickly raised at a low-temperature starting stage, the coolant pump comprises a pump shell, the pump shell is provided with an inner cavity and an open slot surrounding the periphery of the inner cavity, and the inner cavity is provided with a transmission shaft of which the output end is connected with an impeller; rotating blades of the pump assembly are connected with the transmission shaft; the adjusting assembly is movably arranged in the open groove in the axial direction of the pump shell, an elastic piece is arranged between the adjusting assembly and the pump assembly and used for providing pre-tightening force enabling the adjusting assembly to press the open groove, and one end of the adjusting assembly is arranged on the periphery of the impeller in a surrounding mode. The pressure relief runner is arranged on the pump shell, a valve used for controlling the pressure relief runner to be opened and closed is arranged on the pressure relief runner, one end of the pressure relief runner is communicated with the top of the open groove and the water outlet of the pump assembly, and therefore the running flow of the coolant pump can be adjusted, and an engine can reach the working temperature as soon as possible after being started at the low temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of coolant pumps, and more specifically, to an adjustable coolant pump. Background Art

[0002] In a motor vehicle engine system, the engine cooling system is one of the key components to ensure the normal operation of the engine. The engine cooling system generally includes an engine, coolant, a coolant pump, a radiator, and various sensors, etc. Among them, the role of the coolant pump is crucial. It pressurizes the coolant to make it circulate in the cooling system. Specifically, under the action of the coolant pump, the coolant continuously circulates through the radiator and various components of the engine block, taking away the heat generated by the engine, thereby effectively preventing the engine from malfunctioning due to high temperature and ensuring the engine runs stably within the normal temperature range.

[0003] However, in the low-temperature starting stage of the engine, the existing coolant pumps have certain limitations. Due to the operating characteristics of the coolant pump, it cannot quickly increase the temperature of the coolant when the engine starts at low temperature, which in turn causes the engine to fail to quickly warm up to the ideal operating temperature. This situation will not only prolong the time for the engine to reach the optimal operating temperature, but may also have a negative impact on the performance and efficiency of the engine. In the low-temperature starting stage, the combustion efficiency of the engine is low, the fuel consumption is relatively high, and the exhaust emissions will also increase.

[0004] Therefore, how to solve the problem that the existing coolant pumps cannot quickly warm up in the low-temperature starting stage is an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide an adjustable coolant pump, which can adjust the flow rate of the coolant pump during operation, enabling the engine to reach the operating temperature as soon as possible after low-temperature starting, reducing harmful substance emissions, reducing frictional losses and fuel consumption.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An adjustable coolant pump, comprising:

[0008] A pump housing, the pump housing has an inner cavity and an open groove surrounding the outer periphery of the inner cavity. The opening of the open groove faces the first end of the pump housing. A transmission shaft is provided in the inner cavity, and the output end of the transmission shaft extends out of the first end of the pump housing and is connected to an impeller;

[0009] A pump assembly, which is hermetically connected to the first end of the pump housing. The rotating blades of the pump assembly are connected to the transmission shaft. The water inlet of the pump assembly is communicated with the water outlet in the middle of the impeller, and the water outlet of the pump assembly is communicated with the top of the open groove;

[0010] The adjusting assembly is movably arranged along the axial direction of the pump housing in the opening groove. An elastic member is provided between the adjusting assembly and the pump assembly, and the elastic member is used to provide a pre-tightening force for pressing the adjusting assembly against the opening groove. One end of the adjusting assembly surrounds the outer circumference of the impeller.

[0011] The pressure relief flow path is arranged in the pump housing. A valve for controlling the on-off of the pressure relief flow path is provided on the pressure relief flow path. One end of the pressure relief flow path communicates with the top of the opening groove and the water outlet of the pump assembly.

[0012] Preferably, the pump assembly further includes a pump body and an end cover arranged coaxially. The pump body has a cavity for installing the rotating blades. The end cover is hermetically connected to the pump body. The circumferential direction of the pump body is provided with a water inlet and a water outlet communicating with the cavity.

[0013] Preferably, the pump assembly further includes a fixing seat arranged at the bottom of the pump body. The outer edge of the fixing seat is hermetically matched with the inner wall of the adjusting assembly.

[0014] Preferably, a guiding structure is arranged at the bottom of the fixing seat. A guiding hole is arranged on the fixing seat, and the guiding structure is located below the guiding hole.

[0015] Preferably, the guiding structure is a fan-shaped guiding plate, and a guiding channel communicating with the guiding hole is arranged on the guiding plate.

[0016] Preferably, the adjusting assembly includes a piston and a control ring. Both the piston and the control ring are annular structures. An annular groove is arranged at the top of the piston. The bottom of the piston is connected to the control ring. The control ring is movably arranged along the axial direction of the pump housing on the outer circumference of the impeller.

[0017] Preferably, a sealing structure hermetically connected to the inner cavity is arranged on the transmission shaft, and the sealing structure is located at the top of the pump assembly.

[0018] Preferably, the input end of the transmission shaft is connected to a pulley. The pulley is connected to the power output shaft of the engine through a belt. The pulley is rotatably connected to the pump housing through a bearing.

[0019] Preferably, it further includes a control device for controlling the operating state of the valve.

[0020] Preferably, the elastic member is a return spring.

[0021] The adjustable coolant pump provided by the utility model comprises a pump housing, a pump assembly and an adjustment assembly. Specifically, the pump housing has an inner cavity and an opening groove surrounding the outer periphery of the inner cavity. The opening of the opening groove faces the first end of the pump housing. A transmission shaft is arranged in the inner cavity. The adjustment assembly is movably arranged in the opening groove along the axial direction of the pump housing. By providing the inner cavity and the opening groove, space is provided for installing the transmission shaft, the pump assembly and the adjustment assembly. The output end of the transmission shaft extends out of the first end of the pump housing and is connected to an impeller. The pump assembly is hermetically connected to the first end of the pump housing. The rotating blades of the pump assembly are connected to the transmission shaft. The impeller and the rotating blades of the pump assembly are driven by the transmission shaft to rotate synchronously. The water inlet of the pump assembly communicates with the water outlet in the middle of the impeller. The water outlet of the pump assembly communicates with the top of the opening groove. The vacuum generated by the rotation of the pump assembly will suck the coolant from the engine pipeline into the impeller. The coolant enters the pump assembly from the water outlet in the middle of the impeller through the water inlet of the pump assembly. Under the action of the pump assembly, the hydraulic pressure of the coolant increases and is discharged from the water outlet of the pump assembly and enters the opening groove from the top of the opening groove.

[0022] An elastic member is arranged between the adjustment assembly and the pump assembly. The elastic member is used to provide a pre-tightening force for pressing the adjustment assembly against the opening groove. When the pump assembly fails, the elastic member will limit the movement of the adjustment assembly in the direction close to the impeller, so as to ensure the normal operation of the coolant circulation of the impeller. One end of the adjustment assembly surrounds the outer periphery of the impeller. By moving the adjustment assembly axially, the size of the circumferential water outlet of the impeller can be adjusted. A pressure relief flow channel is arranged in the pump housing. A valve for controlling the on-off of the pressure relief flow channel is arranged on the pressure relief flow channel. One end of the pressure relief flow channel communicates with the top of the opening groove and the water outlet of the pump assembly. When the valve is opened, the pressure relief flow channel is in an open circuit. The coolant flowing out of the water outlet of the pump assembly enters the opening groove. Under the action of the hydraulic pressure, the adjustment assembly is pushed to move in the direction close to the impeller until it blocks the circumferential water outlet of the impeller, so that the coolant does not flow. By "zero flow", the best warming-up of the engine is ensured. When the valve is closed, the pressure relief flow channel is in a closed circuit, the hydraulic pressure drops, and the adjustment assembly is reset under the action of the elastic member, so that the adjustment assembly moves in the direction away from the impeller to increase the circumferential water outlet of the impeller, increase the water output of the adjustable coolant pump, and allow the coolant to continue to flow. The process is repeated to ensure the continuous flow of the coolant and maintain the normal working temperature of the engine.

[0023] The adjustable coolant pump arranged in the above manner can quickly increase the coolant temperature through the coordinated action of the adjustment assembly and the pressure relief flow channel during the low-temperature start-up stage of the engine, enable the engine to reach the working temperature faster, thereby improving the combustion efficiency and reducing fuel consumption and exhaust emissions. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0025] Figure 1 Structural schematic diagram of the adjustable coolant pump provided by the present invention;

[0026] Figure 2 Cross-sectional view of the adjustable coolant pump provided by the present invention;

[0027] Figure 3 Exploded view of the pump assembly provided by the present invention;

[0028] Figure 4 Structural schematic diagram of the guide plate provided by the present invention.

[0029] Reference numerals:

[0030] 1 - pump housing;

[0031] 2 - drive shaft;

[0032] 3 - impeller;

[0033] 4 - pump assembly, 41 - rotating blade, 42 - pump body, 43 - end cover, 44 - fixing seat;

[0034] 5 - adjusting assembly, 51 - piston, 52 - control ring;

[0035] 6 - elastic member;

[0036] 7 - pressure relief flow channel;

[0037] 8 - valve;

[0038] 9 - sealing structure;

[0039] 10 - guide plate, 101 - drainage channel;

[0040] 11 - pulley. Detailed implementation manners

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0042] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] It should be noted that the above and below orientation words are defined based on the accompanying drawings of the specification.

[0044] The core of the present utility model is to provide an adjustable coolant pump, which can adjust the flow rate of the coolant pump during operation, enabling the engine to reach the working temperature as soon as possible after a cold start, reducing harmful substance emissions, reducing frictional losses and fuel consumption.

[0045] Please refer to Figure 1 、 Figure 2 and Figure 3 , an adjustable coolant pump includes a pump housing 1, a pump assembly 4, and an adjustment assembly 5.

[0046] Specifically, the pump housing 1 has an inner cavity and an open groove surrounding the outer periphery of the inner cavity. The opening of the open groove faces the first end of the pump housing 1. A transmission shaft 2 is provided in the inner cavity. The adjustment assembly 5 is movably arranged along the axial direction of the pump housing 1 in the open groove. By providing the inner cavity and the open groove, space is provided for installing the transmission shaft 2, the pump assembly 4, and the adjustment assembly 5. The output end of the transmission shaft 2 extends out of the first end of the pump housing 1 and is connected to an impeller 3. The pump assembly 4 is hermetically connected to the first end of the pump housing 1. The rotating blades 41 of the pump assembly 4 are connected to the transmission shaft 2. The impeller 3 and the rotating blades 41 of the pump assembly 4 are driven to rotate synchronously by the transmission shaft 2. The water inlet of the pump assembly 4 is communicated with the water outlet in the middle of the impeller 3. The water outlet of the pump assembly 4 is communicated with the top of the open groove. The vacuum generated by the rotation of the pump assembly 4 will suck the coolant from the engine pipeline into the impeller 3. The coolant enters the pump assembly 4 from the water outlet in the middle of the impeller 3 through the water inlet of the pump assembly 4. Under the action of the pump assembly 4, the hydraulic pressure of the coolant increases and is discharged from the water outlet of the pump assembly 4 and enters the open groove from the top of the open groove.

[0047] An elastic member 6 is provided between the adjusting assembly 5 and the pump assembly 4. The elastic member 6 is used to provide a pre-tightening force for pressing the adjusting assembly 5 against the opening groove. When the pump assembly 4 fails, the elastic member 6 will limit the movement of the adjusting assembly 5 towards the impeller 3, thereby ensuring that the impeller 3 can normally carry out the coolant circulation operation. One end of the adjusting assembly 5 surrounds the outer periphery of the impeller 3. By moving the adjusting assembly 5 axially, the size of the circumferential water outlet of the impeller 3 can be adjusted. The pressure relief flow channel 7 is provided in the pump housing 1, and a valve 8 for controlling the on-off of the pressure relief flow channel 7 is provided on the pressure relief flow channel 7. One end of the pressure relief flow channel 7 communicates with the top of the opening groove and the water outlet of the pump assembly 4. When the valve 8 is opened, the pressure relief flow channel 7 is in an open circuit, and the coolant flowing out of the water outlet of the pump assembly 4 enters the opening groove. Under the action of hydraulic pressure, the adjusting assembly 5 is pushed towards the impeller 3 until it blocks the circumferential water outlet of the impeller 3, causing the coolant to stop flowing, and ensuring the best engine warm-up through "zero flow". When the valve 8 is closed, the pressure relief flow channel 7 is in a closed circuit, the hydraulic pressure drops, and the adjusting assembly 5 resets under the action of the elastic member 6, moving the adjusting assembly 5 away from the impeller 3 to increase the circumferential water outlet of the impeller 3, increasing the water output of the adjustable coolant pump, allowing the coolant to continue flowing, and the process repeats to ensure continuous coolant flow and maintain the normal working temperature of the engine.

[0048] The adjustable coolant pump arranged in the above manner can, by setting the adjustable coolant pump, quickly increase the coolant temperature through the coordinated action of the adjusting assembly 5 and the pressure relief flow channel 7 during the low-temperature start-up stage of the engine, enabling the engine to reach the working temperature faster, thereby improving the combustion efficiency, reducing fuel consumption and exhaust emissions. At the same time, during the normal operation of the engine, through the coordinated action of the elastic member 6 of the adjusting assembly 5 and the valve 8, an efficient cooling effect is maintained to ensure the stable operation of the engine.

[0049] In the above embodiment, a sealing structure 9 is provided on the transmission shaft 2 and is hermetically connected to the inner cavity. The sealing structure 9 is located at the top of the pump assembly 4.

[0050] It should be noted that by setting the sealing structure 9, the transmission shaft 2 and the inner cavity are sealed to prevent the coolant passing through the pump assembly 4 from leaking from the connection between the transmission shaft 2 and the inner cavity, and can also prevent external dust, impurities, moisture, etc. from entering the inner cavity of the pump. The good sealing between the transmission shaft 2 and the inner cavity can ensure the stable existence of the coolant in the inner cavity, thereby ensuring that the output pressure of the pump assembly 4 meets the requirements and enabling the pump assembly 4 to efficiently deliver the coolant to the designated position.

[0051] In the above situation, the pump assembly 4 further includes a pump body 42 and an end cover 43 arranged coaxially. The pump body 42 has a cavity for installing the rotating blade 41, the end cover 43 is hermetically connected to the pump body 42, and the circumferential direction of the pump body 42 is provided with a water inlet and a water outlet communicating with the cavity.

[0052] It can be understood that the pump body 42 and the end cover 43 are coaxially arranged, which makes the structure of the entire pump assembly 4 more compact; it can effectively utilize the space and reduce the volume occupied by the pump assembly 4 during installation and use; it can also ensure better alignment between the rotating blades 41 and the pump body 42 and the end cover 43, which helps to reduce vibration and friction during operation and improve the operating efficiency and stability of the pump.

[0053] The cavity inside the pump body 42 is used to install the rotating blade 41, providing a suitable working space for the rotating blade 41. The rotating blade 41 can rotate freely in the cavity, and the centrifugal force is generated by its rotation to realize the transportation of the coolant. The end cover 43 and the pump body 42 are sealed to ensure that the coolant will not leak from the gap between the end cover 43 and the pump body 42 when the coolant is transported, thereby improving the sealing performance of the pump. It can also prevent foreign impurities from entering the pump, protect the rotating blade 41 inside the pump from pollution and damage, and extend the service life of the pump.

[0054] The pump body 42 is circumferentially provided with a water inlet and a water outlet connected to the cavity, so that the coolant can enter and discharge more smoothly, thereby reducing the resistance and eddy loss of the coolant, allowing the coolant to directly enter and leave the working area of ​​the rotating blade 41, thereby improving the pump's delivery efficiency.

[0055] Furthermore, the pump assembly 4 also includes a fixing seat 44 disposed at the bottom of the pump body 42 , and the outer edge of the fixing seat 44 is sealingly matched with the inner wall of the adjustment assembly 5 .

[0056] It should be noted that the fixing seat 44 is located at the bottom of the pump body 42, providing a stable support for the pump body 42, which can effectively reduce the displacement or shaking of the pump due to vibration or other external forces during operation. The adjustment component 5 can ensure that the coolant will not leak during the adjustment process by sealing with the fixing seat 44, while ensuring the accuracy and reliability of the adjustment action.

[0057] In the above embodiment, a flow guiding structure is provided at the bottom of the fixing seat 44 , a flow guiding hole is provided on the fixing seat 44 , and the flow guiding structure is located below the flow guiding hole.

[0058] It is understandable that the guide structure is located below the guide hole, and can effectively guide the coolant from the bottom of the fixing seat 44 into the pump body 42, so as to reduce the turbulence and eddy current when the coolant enters the pump body 42, so that the coolant enters the cavity of the pump body 42 more smoothly, thereby improving the suction performance of the pump. By optimizing the entry method of the coolant, the energy loss of the coolant when entering the pump body 42 can be reduced.

[0059] Please refer to Figure 4 The guide structure is a fan-shaped guide plate 10, and the guide plate 10 is provided with a guide channel 101 connected with the guide hole.

[0060] It should be noted that by providing the sector-shaped deflector 10 and the drainage channel 101 at the bottom of the fixed seat 44, efficient guidance of the coolant can be achieved within a limited space, avoiding excessive space occupation by additional deflector components.

[0061] The drainage channel 101 is communicated with the drainage holes, providing a clear flow path for the coolant, which can reduce the turbulence and eddy current of the coolant when entering the pump body 42, enabling the coolant to enter the interior of the pump body 42 more smoothly, making the coolant enter the pump body 42 more efficiently, and reducing the energy loss when the coolant enters.

[0062] In the above embodiment, the adjustment assembly 5 includes a piston 51 and a control ring 52. Both the piston 51 and the control ring 52 are annular structures. An annular groove is provided at the top of the piston 51. The bottom of the piston 51 is connected to the control ring 52. The control ring 52 is movably disposed along the axial direction of the pump housing 1 on the outer periphery of the impeller 3.

[0063] It can be understood that both the piston 51 and the control ring 52 are annular structures, enabling the coolant to be evenly distributed in the annular groove of the piston 51, thereby realizing the all-round control of the piston 51.

[0064] During use, the valve 8 is opened to make the pressure relief flow path 7 an open circuit. The transmission shaft 2 rotates to drive the rotating blade 41 to rotate synchronously, generating a vacuum to suck the coolant from the engine pipeline into the impeller 3. The coolant enters the pump body 42 from the water outlet in the middle of the impeller 3 through the water inlet of the pump body 42. Under the action of the rotating blade 41, the hydraulic pressure of the coolant increases. After being discharged from the water outlet of the pump body 42, it enters the opening groove from the top of the opening groove, and flows into the annular groove of the piston 51 after passing through the opening groove. The piston 51 moves downward under the hydraulic pressure of the coolant to drive the control ring 52 to move downward synchronously until the control ring 52 blocks the circumferential water outlet of the impeller 3, making the coolant not flow, and ensuring the best warming-up of the engine through "zero flow". The valve 8 is closed to make the pressure relief flow path 7 a closed circuit, the hydraulic pressure drops, and the piston 51 and the control ring 52 are reset under the action of the elastic member 6, moving the piston 51 and the control ring 52 away from the impeller 3 to increase the circumferential water outlet of the impeller 3, increasing the water output of the adjustable coolant pump and allowing the coolant to continue to flow. The process repeats to ensure the continuous flow of the coolant and maintain the normal working temperature of the engine.

[0065] Among them, the annular structures of the piston 51 and the control ring 52 can form a good sealing fit with the pump housing 1, which can prevent the leakage of the coolant during the adjustment process, thereby improving the sealing performance of the pump.

[0066] As a preferred embodiment, the input end of the transmission shaft 2 is connected to the pulley 11. The pulley 11 is connected to the power output shaft of the engine through a belt, and the pulley 11 is rotatably connected to the pump housing 1 through a bearing.

[0067] It should be noted that when the engine is running, power is output through the power output shaft, and further, the power of the engine can be efficiently transmitted to the transmission shaft 2 of the pump through the belt and the pulley 11.

[0068] In the above situation, a control device for controlling the operating state of the valve 8 is further included.

[0069] In one embodiment, the valve 8 is a solenoid valve, and the solenoid valve is controlled by the signal of the control device. When the engine is running normally, through the coordinated action of the solenoid valve, the adjusting assembly 5, the elastic member 6 and the control device, an efficient cooling effect is maintained to ensure the stable operation of the engine.

[0070] In the above embodiment, the elastic member 6 is a return spring. In practical applications, the type of the elastic member 6 is not limited.

[0071] The pulley 11 transmits power from the engine to the transmission shaft 2 through the belt, driving the rotary vane 41 to rotate to generate a vacuum, so as to suck the coolant from the engine pipeline into the cavity inside the pump body 42. After the coolant enters the cavity inside the pump body 42, when the control device controls the solenoid valve to open, blocking the pressure relief flow channel 7, the high-pressure coolant generated by the pump assembly 4 pushes the piston 51 and the control ring 52 to move downward synchronously, blocking the water outlet of the impeller 3 to adjust the flow circulation, ensuring the best warming-up of the engine, and accurately affecting the temperature of the engine during continuous operation after the engine warms up, so that not only the harmful substance emissions are significantly reduced but also the friction loss and fuel consumption are significantly reduced in the entire working area of the engine; when the control device controls the solenoid valve to close, the pressure relief flow channel 7 is opened, the hydraulic pressure drops, and the piston 51 and the control ring 52 are reset under the action of the return spring, allowing the coolant to continue to flow, and the process repeats to ensure the continuous flow of the coolant and maintain the normal working temperature of the engine.

[0072] In summary, the adjustable coolant pump provided by the present utility model can adjust the flow control of the water pump operation in the entire working area of the engine, reduce harmful substance emissions, reduce friction loss and fuel consumption, achieve reliable operation of the control ring 52 with a very small driving power when the installation space is strictly limited, and ensure the continuous operation of the coolant pump in case of adjustment failure.

[0073] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0074] In the present specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other.

[0075] The above has introduced in detail a coolant pump of a section provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

Claims

1. An adjustable coolant pump, characterized in that: include: A pump housing (1), the pump housing (1) comprising an inner cavity and an open groove arranged around the outer periphery of the inner cavity, the opening of the open groove facing the first end of the pump housing (1), the inner cavity being provided with a transmission shaft (2), the output end of the transmission shaft (2) extending out of the first end of the pump housing (1) and connected to an impeller (3); A pump assembly (4) is sealedly connected to the first end of the pump housing (1), the rotating blades (41) of the pump assembly (4) are connected to the transmission shaft (2), the water inlet of the pump assembly (4) is communicated with the water outlet in the middle of the impeller (3), and the water outlet of the pump assembly (4) is communicated with the top of the open groove; an adjusting component (5) movably arranged in the opening groove along the axial direction of the pump housing (1), an elastic member (6) being arranged between the adjusting component (5) and the pump component (4), the elastic member (6) being used to provide a pre-tightening force for pressing the adjusting component (5) against the opening groove, and one end of the adjusting component (5) being arranged around the outer periphery of the impeller (3); A pressure relief channel (7) is provided on the pump housing (1), and a valve (8) for controlling the on / off of the pressure relief channel (7) is provided on the pressure relief channel (7). One end of the pressure relief channel (7) is connected to the top of the open groove and the water outlet of the pump assembly (4).

2. The adjustable coolant pump according to claim 1, characterized in that The pump assembly (4) further comprises a coaxially arranged pump body (42) and an end cover (43); the pump body (42) has a cavity for mounting the rotating blades (41); the end cover (43) is sealedly connected to the pump body (42); and a water inlet and a water outlet communicating with the cavity are provided in the circumference of the pump body (42).

3. The adjustable coolant pump according to claim 2, characterized in that The pump assembly (4) further comprises a fixing seat (44) arranged at the bottom of the pump body (42), and the outer edge of the fixing seat (44) is sealingly matched with the inner wall of the regulating assembly (5).

4. The adjustable coolant pump according to claim 3, characterized in that A flow guiding structure is provided at the bottom of the fixing seat (44), a flow guiding hole is provided on the fixing seat (44), and the flow guiding structure is located below the flow guiding hole.

5. The adjustable coolant pump according to claim 4, characterized in that The flow guide structure is a fan-shaped flow guide plate (10), and the flow guide plate (10) is provided with a flow guide channel (101) that is in communication with the flow guide hole.

6. The adjustable coolant pump according to any one of claims 1 to 5, characterized in that The regulating assembly (5) comprises a piston (51) and a control ring (52); the piston (51) and the control ring (52) are both annular structures; an annular groove is provided on the top of the piston (51); the bottom of the piston (51) is connected to the control ring (52); and the control ring (52) is movably provided on the outer periphery of the impeller (3) along the axial direction of the pump housing (1).

7. The adjustable coolant pump according to claim 6, characterized in that The transmission shaft (2) is provided with a sealing structure (9) which is sealingly connected to the inner cavity, and the sealing structure (9) is located at the top of the pump assembly (4).

8. The adjustable coolant pump according to claim 7, characterized in that The input end of the transmission shaft (2) is connected to a pulley (11), the pulley (11) is connected to a power output shaft of the engine via a belt, and the pulley (11) is rotatably connected to the pump housing (1) via a bearing.

9. The adjustable coolant pump according to claim 8, characterized in that It also includes a control device for controlling the operating state of the valve (8).

10. The adjustable coolant pump according to claim 9, characterized in that The elastic member (6) is a return spring.

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