Impeller assembly for engine cooling water pump and cooling water pump formed by impeller assembly

Abstract

The utility model discloses an impeller assembly used on an engine cooling water pump and a cooling water pump formed by the impeller assembly, the impeller assembly comprises an impeller body, an impeller assembly cylinder is arranged in the impeller body in a penetrating mode, and a wear-resistant insert is installed in the impeller assembly cylinder of the impeller body in an embedded mode. The wear-resistant insert is of a hollow structure, a rotating shaft hole is formed in the wear-resistant insert, a rotating shaft is assembled in the rotating shaft hole of the wear-resistant insert in a power fit mode, driving teeth are circumferentially distributed on the outer portion of the rotating shaft, and driven teeth which are in power fit with the driving teeth are circumferentially distributed on the inner wall of the rotating shaft hole of the wear-resistant insert. The wear-resistant insert is embedded into the impeller body and is vulcanized, integrally formed and fixed into a whole, and meanwhile, the rotating shaft and the wear-resistant insert adopt a gear-like transmission structure, so that the structural performance of the impeller body is enhanced, and the service life of the impeller body is prolonged; the multiple liquid injection grooves and the communicating liquid channels communicating with the liquid injection grooves are distributed in the circumference of the end face of the impeller assembly cylinder of the impeller body, and the double functions of rotating driving lubricating and cooling are achieved.

Description

Technical Field

[0001] The utility model relates to the field of cooling water pumps, in particular to an impeller assembly for an engine cooling water pump and a cooling water pump constituted by the same. Background Art

[0002] The main task of a cooling water pump is to provide coolant to the inside of an engine to ensure that the engine remains within a suitable operating temperature range (protecting the engine from damage caused by high temperatures), and it is an important component of the engine. The impellers of existing cooling water pumps are generally made of plastic materials (plastic materials are lighter in weight and can output higher speeds). The rotating shaft of the motor is fixedly fitted inside the impeller. During the driving rotation of the motor, heat will be generated, which will cause the rotating shaft and the impeller to become loose. At the same time, the inner wall of the impeller will be damaged after being heated for a long time; the impeller and the rotating shaft are generally assembled and fixed by pins or splines. High temperature and high-speed rotation will further damage the impeller by the fixing parts between them. Content of the Utility Model

[0003] The purpose of the utility model is to solve the technical problems pointed out in the background art, and to provide an impeller assembly for an engine cooling water pump and a cooling water pump constituted by the same. A wear-resistant insert is embedded inside the impeller body and vulcanized and integrally formed into a whole. In this way, the rotating shaft does not directly contact the inner wall of the impeller body, enhancing the structural performance and service life of the impeller body and effectively protecting the impeller body; the rotating shaft and the wear-resistant insert adopt a gear transmission structure in which driving key teeth and driven key teeth mesh with each other. While playing a role in driving rotation, it effectively prevents the impeller body from being damaged.

[0004] The purpose of the utility model is achieved by the following technical solutions:

[0005] An impeller assembly for an engine cooling water pump includes an impeller body. An impeller assembly cylinder penetrates through the impeller body. A wear-resistant insert is embedded and installed inside the impeller assembly cylinder of the impeller body. The wear-resistant insert has a hollow structure and a rotating shaft hole inside. A rotating shaft is power-fitted in the rotating shaft hole of the wear-resistant insert. Driving key teeth are arranged in a circumferential distribution on the outside of the rotating shaft. Driven key teeth that are power-matched with the driving key teeth are arranged in a circumferential distribution on the inner wall of the rotating shaft hole of the wear-resistant insert.

[0006] In order to better implement the utility model, a plurality of impeller blades are arranged in a circumferential distribution on the outside of the impeller body. The impeller body is made of rubber material; the wear-resistant insert is embedded inside the impeller assembly cylinder of the impeller body and integrally formed into a whole component through vulcanization treatment.

[0007] Preferably, a plurality of liquid injection grooves are circumferentially distributed on the end face of one end of the impeller assembly cylinder of the impeller body, and all the liquid injection grooves are sequentially communicated through a communication liquid passage; there is a driving clearance between the driving key teeth of the rotating shaft and the driven key teeth of the wear-resistant insert, and each liquid injection groove is correspondingly matched with the driving clearance.

[0008] Preferably, the wear-resistant insert is a metal insert with a wear-resistant material layer on the outer layer.

[0009] Preferably, the outer wall of the wear-resistant insert has a concave positioning groove, and the inner wall of the impeller assembly cylinder of the impeller body has a rubber convex block that cooperates with the concave positioning groove.

[0010] Preferably, the impeller assembly cylinder of the impeller body has a limiting ring plate protruding at both ends of the wear-resistant insert, and the wear-resistant insert is fitted and embedded between the limiting ring plates on both sides.

[0011] Preferably, a plurality of liquid injection grooves are circumferentially distributed on the end faces of both ends of the impeller assembly cylinder of the impeller body.

[0012] A cooling water pump composed of an impeller assembly, including an impeller assembly, an impeller housing and a main housing. The impeller housing is hermetically connected to the main housing. The impeller assembly is located in the impeller housing. A cover plate is hermetically installed on the end side of the impeller housing. The rotating shaft of the impeller assembly penetrates the main housing, and a bearing cooperating with the rotating shaft is installed inside the main housing.

[0013] Preferably, a sealing plate is further installed between the impeller housing and the main housing, and the part of the rotating shaft extending out of the main housing is the power end of the rotating shaft.

[0014] Preferably, a water seal cavity is further provided inside the main housing near the sealing plate.

[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0016] (1) In the utility model, a wear-resistant insert is embedded inside the impeller body and vulcanized and integrally formed into a whole, so that the rotating shaft does not directly contact the inner wall of the impeller body, enhancing the structural performance and service life of the impeller body and effectively protecting the impeller body; the rotating shaft and the wear-resistant insert adopt a gear transmission structure in which the driving key teeth and the driven key teeth mesh with each other, which can effectively avoid damage to the impeller body while driving the rotation.

[0017] (2) On the end face of the impeller assembly cylinder of the impeller body of the utility model, a plurality of liquid injection grooves and a communication liquid passage connecting the liquid injection grooves are circumferentially distributed. The liquid injection grooves are correspondingly matched with the driving clearances of the driving key teeth and the driven key teeth. The lubricating and cooling mixed liquid in the liquid injection grooves will flow into the driving clearances, and at the same time, the lubricating and cooling mixed liquid circulates, playing a dual role of rotating drive lubrication and temperature reduction, which is beneficial to improving the overall performance of the impeller assembly.

[0018] (3) The core of the cooling water pump of the present utility model consists of an impeller assembly, which improves the overall structural performance, reduces the failure rate, and has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the impeller assembly without a liquid injection groove in the embodiment;

[0020] Figure 2 is Figure 1 A - A cross-sectional view of

[0021] Figure 3 It is a three-dimensional schematic diagram of the impeller assembly without a liquid injection groove in the embodiment;

[0022] Figure 4 It is a schematic structural diagram of the impeller assembly with a liquid injection groove in the embodiment;

[0023] Figure 5 is Figure 4 B - B cross-sectional view of

[0024] Figure 6 It is a three-dimensional schematic diagram of the impeller assembly with a liquid injection groove of the present utility model;

[0025] Figure 7 It is a cross-sectional view of the rotating shaft in the embodiment;

[0026] Figure 8 It is a partial front view of the rotating shaft in the embodiment;

[0027] Figure 9 It is a schematic structural diagram of the impeller assembly constituting the cooling water pump in the embodiment.

[0028] Among them, the names corresponding to the reference numerals in the drawings are:

[0029] 1 - main housing, 2 - impeller housing, 3 - sealing plate, 4 - rotating shaft, 41 - power end of the rotating shaft, 42 - driving key teeth, 5 - wear-resistant insert, 51 - rotating shaft hole, 52 - driven key teeth, 6 - impeller body, 7 - liquid injection groove, 8 - communicating liquid channel, 9 - concave positioning groove, 10 - limiting ring plate, 11 - bearing, 12 - water seal cavity, 13 - cover plate. SPECIFIC EMBODIMENTS

[0030] The present utility model will be further described in detail below in conjunction with the embodiments:

[0031] Embodiment

[0032] As Figures 1 to 8As shown in the figure, an impeller assembly for an engine cooling water pump includes an impeller body 6. An impeller assembly cylinder penetrates through the interior of the impeller body 6 (the interior space of the impeller assembly cylinder is used for assembling a wear-resistant insert 5). The wear-resistant insert 5 is embedded and installed inside the impeller assembly cylinder of the impeller body 6. Preferably, the wear-resistant insert 5 is a metal insert with a wear-resistant material layer on the outer layer. The wear-resistant insert 5 has a hollow structure and a rotating shaft hole 51 inside the wear-resistant insert 5 (the rotating shaft hole 51 is used for power-fitting and installing a rotating shaft 4). A rotating shaft 4 is power-fitted and assembled in the rotating shaft hole 51 of the wear-resistant insert 5. Drive key teeth 42 are circumferentially distributed on the outside of the rotating shaft 4. Driven key teeth 52 that are power-matched with the drive key teeth 42 are circumferentially distributed on the inner wall of the rotating shaft hole 51 of the wear-resistant insert 5. As Figure 4 、 Figure 7 shown, each drive key tooth 42 and each driven key tooth 52 are structured in a matching manner like gear meshing, enabling the rotational driving force of the rotating shaft 4 to be transmitted to the wear-resistant insert 5, causing the wear-resistant insert 5 and the entire impeller body 6 to rotate under the power drive of the rotating shaft 4.

[0033] As Figure 1 、 Figure 3 shown, a number of impeller blades are circumferentially distributed on the outside of the impeller body 6. The impeller body 6 is made of rubber or plastic material. The wear-resistant insert 5 is embedded inside the impeller assembly cylinder of the impeller body 6 and integrally formed into a whole part through vulcanization treatment; the impeller assembly cylinder of the impeller body 6 has limiting ring plates 10 protruding at both ends of the wear-resistant insert 5. The wear-resistant insert 5 is fitted and embedded between the two limiting ring plates 10 on both sides; during manufacturing, the wear-resistant insert 5 is fitted and fixed between the limiting ring plates 10 on both inner walls of the impeller body 6, and then integrally formed into a whole part through vulcanization treatment. Preferably, the outer wall of the wear-resistant insert 5 has concave positioning grooves 9, and the inner wall of the impeller assembly cylinder of the impeller body 6 has rubber bumps that cooperate with the concave positioning grooves 9; when the wear-resistant insert 5 is embedded and assembled, each concave positioning groove 9 of the wear-resistant insert 5 is in concave-convex fit and positioning fixation with the rubber bumps of the impeller body 6, and during vulcanization treatment, the wear-resistant insert 5 can also be better fixed to the impeller assembly cylinder as a whole.

[0034] As Figure 4 、 Figure 6As shown in the figure, on the end face of one end of the impeller assembly cylinder of the impeller body 6, a number of liquid injection grooves 7 are arranged in a circumferential distribution, and all the liquid injection grooves 7 are sequentially connected through a communication liquid channel 8. There is a driving gap between the driving key teeth 42 of the rotating shaft 4 and the driven key teeth 52 of the wear-resistant insert 5, and each liquid injection groove 7 is correspondingly matched with the driving gap; before the impeller assembly works, a lubricating and cooling mixed liquid is injected into each liquid injection groove 7 (during maintenance, the lubricating and cooling mixed liquid can be refilled or replaced). Since the liquid injection grooves 7 are connected through the communication liquid channel 8, all the liquid injection grooves 7 will also distribute the lubricating and cooling mixed liquid during the movement process; when the impeller body 6 rotates, the lubricating and cooling mixed liquid will flow evenly through the communication liquid channel 8 in each liquid injection groove 7. The bottom of each liquid injection groove 7 is matched with the driving gap, and the lubricating and cooling mixed liquid in each liquid injection groove 7 will flow into the driving gap. First, it plays a lubricating role. Second, since the lubricating and cooling mixed liquid circulates in the driving gap, the communication liquid channel 8, and each liquid injection groove 7, the lubricating and cooling mixed liquid will play a role in cooling and temperature reduction. At the same time, the lubricating and cooling mixed liquid in the liquid injection groove 7 will also contact the external space of the impeller body 6 (the external space is the space inside the impeller housing 2, and the space of the impeller housing 2 will also be cooled).

[0035] In some embodiments, on the end faces of both ends of the impeller assembly cylinder of the impeller body 6, a number of liquid injection grooves 7 are arranged in a circumferential distribution, and all the liquid injection grooves 7 on each end face of the impeller assembly cylinder are sequentially connected through a communication liquid channel 8.

[0036] As Figure 9 shown, a cooling water pump composed of an impeller assembly includes an impeller assembly, an impeller housing 2, and a main housing 1. The impeller housing 2 is hermetically connected to the main housing 1. The impeller assembly is mainly located in the impeller housing 2. The cooling water pump is correspondingly provided with a liquid inlet and a liquid outlet on the impeller housing 2 (the liquid outlet is used for corresponding connection to the inside of the engine). A cover plate 13 is hermetically installed on the end side of the impeller housing 2 (the cover plate 13 is detachably hermetically connected to the end side of the impeller housing 2, which is convenient for overhauling the inside of the cooling water pump and the inside of the impeller assembly). The rotating shaft 4 of the impeller assembly penetrates through the main housing 1, and a bearing 11 matched with the rotating shaft 4 is installed inside the main housing 1.

[0037] In some embodiments, a sealing plate 3 is further installed between the impeller housing 2 and the main housing 1 (the sealing plate 3 is used to seal and block the liquid). The part of the rotating shaft 4 extending out of the main housing 1 is the power end 41 of the rotating shaft, and a driving motor is assembled and matched on the power end 41 of the rotating shaft. Preferably, a water seal cavity 12 is further provided inside the main housing 1 near the sealing plate 3.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An impeller assembly for an engine cooling water pump, characterized in that: It includes an impeller body (6). An impeller assembly cylinder runs through the inside of the impeller body (6). A wear-resistant insert (5) is embedded and installed inside the impeller assembly cylinder of the impeller body (6). The wear-resistant insert (5) has a hollow structure and a rotating shaft hole (51) inside it. A rotating shaft (4) is power-fitted in the rotating shaft hole (51) of the wear-resistant insert (5). Driving key teeth (42) are circumferentially distributed on the outside of the rotating shaft (4). Driven key teeth (52) that are power-matched with the driving key teeth (42) are circumferentially distributed on the inner wall of the rotating shaft hole (51) of the wear-resistant insert (5).

2. The impeller assembly for an engine cooling water pump according to claim 1, characterized in that: A number of impeller blades are circumferentially distributed on the outside of the impeller body (6). The impeller body (6) is made of rubber material; the wear-resistant insert (5) is embedded inside the impeller assembly cylinder of the impeller body (6) and integrally formed into a whole component through vulcanization treatment.

3. The impeller assembly for an engine cooling water pump according to claim 1, characterized in that: On the end face of one end of the impeller assembly cylinder of the impeller body (6), a number of liquid injection grooves (7) are circumferentially distributed. All the liquid injection grooves (7) are sequentially connected through a connecting liquid passage (8); there is a driving gap between the driving key teeth (42) of the rotating shaft (4) and the driven key teeth (52) of the wear-resistant insert (5), and each liquid injection groove (7) is correspondingly matched with the driving gap.

4. The impeller assembly for an engine cooling water pump according to claim 1, characterized in that: The wear-resistant insert (5) is a metal insert with a wear-resistant material layer on the outer layer.

5. The impeller assembly for an engine cooling water pump according to claim 2, wherein: The outer wall of the wear-resistant insert (5) has a concave positioning groove (9), and the inner wall of the impeller assembly cylinder of the impeller body (6) has a rubber convex block that cooperates with the concave positioning groove (9).

6. The impeller assembly for an engine cooling water pump according to claim 1, wherein: On both sides of the wear-resistant insert (5), the impeller assembly cylinder of the impeller body (6) bulges to form a limit ring plate (10), and the wear-resistant insert (5) is fitted and embedded between the two limit ring plates (10).

7. The impeller assembly for an engine cooling water pump according to claim 3, characterized in that: On the end faces of both ends of the impeller assembly cylinder of the impeller body (6), a number of liquid injection grooves (7) are circumferentially distributed.

8. A cooling water pump composed of the impeller assembly according to any one of claims 1 to 7, characterized in that: It includes an impeller assembly, an impeller housing (2) and a main housing (1). The impeller housing (2) is hermetically connected to the main housing (1). The impeller assembly is located in the impeller housing (2). A cover plate (13) is hermetically installed on the end side of the impeller housing (2). The rotating shaft (4) of the impeller assembly runs through the main housing (1), and a bearing (11) that cooperates with the rotating shaft (4) is installed inside the main housing (1).

9. The coolant pump according to claim 8, characterized in that: A sealing plate (3) is also installed between the impeller housing (2) and the main housing (1). The part of the rotating shaft (4) that extends out of the main housing (1) is the rotating shaft power end (41).

10. The coolant pump according to claim 9, characterized in that: A water seal cavity (12) is also provided inside the main housing (1) near the sealing plate (3).

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