A water pump housing suitable for multiple working conditions

Abstract

The utility model provides a kind of automobile water pump shell suitable for multiple working conditions, including water pump shell main body, the water pump shell main body is integrally provided with the drain pipe mouth and the water injection pipe mouth, the drain pipe mouth and the water injection pipe mouth are respectively provided with the balance pipe mouth, the balance pipe mouth is installed with the pressure balance pipe spare by the electromagnetic valve;The utility model is provided with integrated balance structure in injection drain pipe mouth, two-way adaptation full working condition pressure (low pressure pressure compensation anti-cavitation, high pressure pressure relief prevents leakage), integrated design saves space and reduces failure, balance pipe top exhaust valve exhaust air prevents air cushion, guaranteeing adjustment accuracy and prolonging component life.

Description

Technical Field

[0001] This utility model belongs to the field of water pump housing technology, and in particular relates to a car water pump housing suitable for multiple working conditions. Background Technology

[0002] The automotive water pump is a core component of the engine cooling system. The water pump housing, serving as the basic load-bearing and fluid guiding structure, directly determines the stability of the cooling system under operating conditions. With the increasing complexity of automotive operating conditions (including idling cold starts, high-speed high-load conditions, and engine start-stop switching in hybrid vehicles), traditional automotive water pump housings are gradually revealing numerous technical shortcomings. Traditional water pump casings only have basic fluid delivery channels. The water inlet and outlet are not equipped with integrated pressure balancing structures. Under low-speed idling or cold-start conditions, the water inlet is prone to cavitation due to low pressure, causing impeller erosion and abnormal pump vibration. Under high-speed and high-load conditions, the pressure at the outlet rises sharply, which can easily lead to leakage at pipe joints and aging and failure of seals. It cannot adapt to the pressure fluctuation requirements under multiple operating conditions.

[0003] Therefore, it is essential to invent a car water pump housing suitable for multiple operating conditions. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a car water pump housing suitable for multiple working conditions, including a water pump housing body, a drain pipe, a water injection pipe, a balance pipe, a solenoid valve, and a pressure balancing fitting. The drain pipe and the water injection pipe are integrally provided on the water pump housing body, and the balance pipe is provided on the drain pipe and the water injection pipe respectively. The pressure balancing fitting is installed on the balance pipe through the solenoid valve.

[0005] Preferably, the balancing port is vertically arranged on the drain port and the water injection port, and the balancing port is connected to the pressure balancing fitting through a solenoid valve.

[0006] Preferably, the pressure balancing fitting includes a balancing pipe, an exhaust port, a one-way valve, a balancing head, and a balancing spring. The balancing pipe is connected to a solenoid valve, and the one-way valve is installed at the exhaust port on the balancing pipe. The balancing head is elastically sealed inside the balancing pipe by the balancing spring.

[0007] Preferably, an exhaust port is provided at the top of the balance tube, i.e., at its highest point, and a one-way valve installed at the exhaust port is a gas one-way valve structure. The lower part of the balance tube is connected to the balance tube port through a solenoid valve.

[0008] Preferably, the upper part of the inside of the balance tube is fixed to one end of the balance spring, the other end of the balance spring is fixed to the balance head, and the balance head is in sliding sealing contact with the inner wall of the balance tube.

[0009] Preferably, the liquid inside the drain port and the water inlet is allowed to enter the balance pipe through the balance port and the solenoid valve, and compress the balance spring.

[0010] Compared with the prior art, the present invention has the following beneficial effects: This invention integrates a balancing pipe and pressure balancing fitting on both the water inlet and the drain pipe. The pressure balancing fitting on the water inlet side can increase the inlet pressure under low operating conditions through the elastic compensation of the balancing spring and the balancing head, thus suppressing cavitation at its source. The pressure balancing fitting on the drain pipe side can release pressure under high operating conditions by squeezing the balancing spring and pushing the balancing head with liquid, thus preventing excessive drainage pressure from causing pipeline leakage. The bidirectional balancing structure takes into account both low-pressure replenishment and high-pressure relief needs, and is suitable for pressure fluctuations under all operating conditions from idling cold start to high speed and high load.

[0011] The balance pipe port and the water pump housing are integrally formed. The pressure balance pipe is directly connected to the balance pipe port through a solenoid valve, eliminating the need for an external independent balance valve and complex piping. This significantly reduces the space occupied in the engine compartment, reduces the number of system parts and assembly steps, and lowers the probability of additional failure points such as pipe joints, thereby improving the overall reliability of the cooling system.

[0012] The balance pipe fitting of this utility model has an exhaust port and a one-way valve at the highest point of the balance pipe. This allows for the rapid discharge of residual air and dissolved gases from the initial filling or operation of the pipeline, preventing the formation of "air cushions". The one-way valve also prevents external air from seeping in, ensuring that the balance pipe is always in a pure liquid environment. This guarantees the adjustment response speed and accuracy of the balance head and balance spring, eliminates faults such as air binding and cavitation, and extends the service life of the pump impeller and seals. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0015] Figure 3 This is a partial cross-sectional structural diagram of the pressure balancing pipe fitting of this utility model.

[0016] In the picture: 1. Water pump housing body; 2. Drain pipe port; 3. Water injection pipe port; 4. Balance pipe port; 5. Solenoid valve; 6. Pressure balance fittings; 61. Balance pipe; 62. Exhaust port; 63. Check valve; 64. Balance head; 65. Balance spring. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0018] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0019] As attached Figure 1 To be continued Figure 3 As shown: This utility model provides a car water pump housing suitable for multiple working conditions, including a water pump housing body 1, a drain pipe 2, a water injection pipe 3, a balance pipe 4, a solenoid valve 5, and a pressure balancing fitting 6. The drain pipe 2 and the water injection pipe 3 are integrally provided on the water pump housing body 1. The balance pipe 4 is respectively provided on the drain pipe 2 and the water injection pipe 3. The pressure balancing fitting 6 is installed on the balance pipe 4 through the solenoid valve 5.

[0020] Furthermore, the outer walls of the drain port 2 and water inlet 3 of the water pump housing 1 are integrally cast with vertically extending balance ports 4. The balance ports 4 are made of the same A356T6 aluminum alloy as the water pump housing 1, and their axis is arranged perpendicularly to the fluid channel axis of the drain port 2 and water inlet 3 at 90°, and is adapted to the inner diameter of the branch flow channels of the drain port 2 and water inlet 3. The top end face of the balance ports 4 is machined with an external thread structure. The inlet end of the solenoid valve 5 is screwed into the balance ports 4 through an internal threaded connector, and a fluororubber O-ring is embedded at the connector to achieve a seal. The outlet end of the solenoid valve 5 is fastened to the bottom interface bolt of the pressure balance fitting 6 through a flange. A high-pressure resistant graphite sealing gasket is placed between the flanges to ensure that the coolant does not leak under high pressure conditions, thereby achieving stable connection between the balance ports 4 and the pressure balance fitting 6 through the solenoid valve 5.

[0021] Furthermore, the pressure balancing fitting 6 is an integrated pressure regulating component. Its core load-bearing structure is a 304 stainless steel balancing pipe 61. The bottom end of the balancing pipe 61 is sealed and connected to the outlet end of the solenoid valve 5 via a flange interface. A circular vent 62 is pre-set at the top of the pipe wall of the balancing pipe 61. An internally threaded base is fixed to the vent 62 by welding. A gas check valve 63 is screwed into the base. The check valve 63 uses a brass valve body and a nitrile rubber valve core, allowing only the gas inside the pipe to be discharged outward and preventing the outside air from seeping inward. A balancing head 64 and a balancing spring 65 are coaxially mounted inside the balancing pipe 61. The balancing spring 65 is a cylindrical helical spring made of austenitic stainless steel, and the balancing head 64 is a composite structure of polytetrafluoroethylene-coated aluminum alloy. Its side wall is embedded with a fluororubber sealing ring. The elastic support of the balancing spring 65 achieves a sliding sealing fit with the inner wall of the balancing pipe 61, forming an elastic sealing regulating structure.

[0022] Furthermore, the balance pipe 61 is a vertically arranged hollow tubular structure. A 5mm diameter vent 62 is drilled through the highest geometric point of the pipe's top using CNC drilling. The axis of the vent 62 coincides with the axis of the balance pipe 61, ensuring that air inside the pipe can naturally accumulate and be discharged. The one-way valve 63 installed at the vent 62 is a one-way opening gas check valve structure with an opening pressure threshold set at 0.02MPa. It automatically opens to discharge gas only when the gas pressure inside the pipe is slightly higher than atmospheric pressure, and the valve core has a reverse sealing capability, completely preventing the entry of outside air. A flow port is provided on the bottom side wall of the balance pipe 61. This flow port is connected to the inner cavity of the outlet of the solenoid valve 5 via a seamless steel pipe. The connection points between the steel pipe, the balance pipe 61, and the solenoid valve 5 are all sealed using argon arc welding, allowing the coolant in the drain pipe 2 and the water injection pipe 3 to sequentially enter the lower internal space of the balance pipe 61 through the balance pipe port 4 and the solenoid valve 5.

[0023] Furthermore, an annular spring positioning seat is welded to the top of the inner part of the balance tube 61. The upper end of the balance spring 65 is fixed in the groove of the positioning seat by an interference fit, and its lower end is fastened to the center threaded hole at the top of the balance head 64 by a threaded connector. The preload of the balance spring 65 can be precisely adjusted by the thread insertion depth. The balance head 64 is a stepped cylindrical structure. Two coaxially arranged fluororubber O-rings are embedded in the side wall of its large-diameter section, forming a double sliding seal contact with the inner wall of the balance tube 61. The outer diameter of the large-diameter section is clearance-fitted with the inner diameter of the balance tube 61, which ensures sealing performance and reduces sliding resistance. The small-diameter section of the balance head 64 extends to the lower flow area of ​​the balance tube 61, and the opening of the flow channel can be adjusted by the extension and contraction of the spring.

[0024] Furthermore, when the car's water pump is under high load, the high-pressure coolant in the drain pipe 2 or the pressurized coolant in the filler pipe 3 under low load can trigger the solenoid valve 5 to open under the control of the vehicle's ECU. The coolant then flows into the solenoid valve 5 through the branch channel of the balance pipe 4, and after the flow is regulated by the solenoid valve 5, it enters the lower internal space of the balance pipe 61. The coolant in the balance pipe 61 will create a hydraulic thrust on the small-diameter end face of the balance head 64. When this thrust is greater than the preload of the balance spring 65, the coolant can push the balance head 64 to slide upward along the inner wall of the balance pipe 61, simultaneously compressing the balance spring 65 and achieving adaptive adjustment of the pressure inside the pipe. During this process, the double sealing ring on the side wall of the balance head 64 can ensure that there is no coolant leakage, and the one-way valve 63 at the top of the balance pipe 61 will simultaneously discharge the residual air squeezed in the pipe, ensuring that the coolant can stably fill the space below the balance pipe 61 and complete the compression action of the balance spring 65.

[0025] The working principle is as follows: First, after the car water pump enters different working conditions, the vehicle control unit will trigger the solenoid valve 5 of the corresponding pipeline to open according to the working condition requirements, so that the high-pressure coolant in the drain pipe port 2 or the replenishing coolant in the water injection pipe port 3 on the water pump housing 1 flows into the balance pipe 61 of the pressure balance pipe 6 through the balance pipe port 4.

[0026] Secondly, the coolant entering the balance pipe 61 will act on the balance head 64. When the thrust of the coolant on the balance head 64 reaches the corresponding threshold, it will push the balance head 64 to move upward along the inner wall of the balance pipe 61, and simultaneously compress the balance spring 65, thereby achieving preliminary adaptive adjustment of the pressure inside the pipe.

[0027] Furthermore, during the process of the balance head 64 moving upward and squeezing the space above the inside of the balance tube 61, the air remaining in the tube will be squeezed to the exhaust port 62, and then discharged outward through the one-way valve 63 at the exhaust port 62, so as to avoid the air forming an air cushion that affects the adjustment effect and ensure that the coolant can stably fill the space below the balance tube 61.

[0028] Next, when the water pump operating conditions change and the coolant pressure in the drain port 2 or the water inlet port 3 decreases, the balance spring 65 will release elastic potential energy, causing the balance head 64 to reset downward along the inner wall of the balance tube 61, thereby adjusting the pressure in the balance tube 61 in the opposite direction, so that the pressure at the drain port 2 and the water inlet port 3 can be restored to a stable state suitable for the operating conditions.

[0029] Finally, throughout the entire pressure regulation process, the balance head 64 always maintains a sliding seal with the inner wall of the balance pipe 61 to ensure that the coolant will not leak. The solenoid valve 5 can be opened and closed in a timely manner according to changes in operating conditions, so as to achieve precise control of the pressure regulation process under different operating conditions and ensure that the water pump housing 1 is adaptable to the needs of multi-operating conditions.

[0030] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A car water pump housing suitable for multiple operating conditions, characterized in that, The pump includes a water pump housing (1), a drain port (2), a water injection port (3), a balance port (4), a solenoid valve (5), and a pressure balance fitting (6). The water pump housing (1) is integrally provided with the drain port (2) and the water injection port (3). The drain port (2) and the water injection port (3) are respectively provided with the balance port (4). The balance port (4) is connected to the pressure balance fitting (6) through the solenoid valve (5).

2. The automotive water pump housing suitable for multiple operating conditions as described in claim 1, characterized in that: The balancing port (4) is vertically installed on the drain port (2) and the water injection port (3), and the balancing port (4) is connected to the pressure balancing fitting (6) through the solenoid valve (5).

3. The automotive water pump housing suitable for multiple operating conditions as described in claim 2, characterized in that: The pressure balancing fitting (6) includes a balancing pipe (61), an exhaust port (62), a one-way valve (63), a balancing head (64), and a balancing spring (65). The balancing pipe (61) is connected to a solenoid valve (5). The one-way valve (63) is installed at the exhaust port (62) on the balancing pipe (61). The balancing head (64) is elastically sealed inside the balancing pipe (61) by the balancing spring (65).

4. The automotive water pump housing suitable for multiple operating conditions as described in claim 3, characterized in that: An exhaust port (62) is provided above the balance pipe (61), at its highest point. The one-way valve (63) installed at the exhaust port (62) is a gas one-way valve structure. The lower part of the balance pipe (61) is connected to the balance pipe port (4) through a solenoid valve (5).

5. A car water pump housing suitable for multiple operating conditions as described in claim 4, characterized in that: The upper part of the inside of the balance tube (61) is fixed to one end of the balance spring (65), and the other end of the balance spring (65) is fixed to the balance head (64). The balance head (64) is in sliding and sealing contact with the inner wall of the balance tube (61).

6. The automotive water pump housing suitable for multiple operating conditions as described in claim 5, characterized in that: Liquid inside the drain port (2) and the water inlet (3) is allowed to enter the balance pipe (61) through the balance port (4) and the solenoid valve (5) and compress the balance spring (65).

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