Water pump with step sealing piece

Abstract

The utility model relates to the field of water pumps, in particular to a water pump with a step sealing piece. Comprising a main shaft and a shell, the shell is provided with a water inlet and a water outlet which are formed in the axial direction and the radial direction of the main shaft respectively, the main shaft is provided with an impeller corresponding to the water inlet, a vacuum impeller is arranged on the side, away from the water inlet, of the impeller on the main shaft, and the step sealing piece is arranged on the main shaft in a sleeving mode and located between the impeller and the vacuum impeller; the section, passing through the axis, of the stepped sealing piece forms a stepped structure and comprises a first part and a second part which are integrally formed. The inner walls, close to the main shaft, of the first part and the second part are provided with a first sealing groove and a second sealing groove around the axes of the first sealing groove and the second sealing groove respectively. Through the design of the step sealing piece, the double-layer sealing effect is achieved, the sealing performance of the water pump is remarkably improved, and fluid leakage is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump field especially relates to a water pump with ladder seal. BACKGROUND

[0002] Traditional water pump when sucking fluid, often face the problem of poor sealing effect, fluid leakage, which directly affects the pumping efficiency and running stability of water pump. Especially in the sealing design between the main shaft, impeller and vacuum impeller of water pump, if the sealing is not strict, not only will lead to fluid leakage, reduce the pumping efficiency of water pump, but also may cause adverse effects on the overall performance and service life of water pump. SUMMARY

[0003] The utility model aims at providing a water pump with ladder seal to solve the problem of poor sealing effect in the prior art.

[0004] The utility model discloses a technical scheme of a water pump with ladder seal, comprising a main shaft and a shell, the shell has water inlet and water outlet respectively along the main shaft axial direction and radial direction, the main shaft is provided with an impeller corresponding to the water inlet, and a vacuum impeller is arranged on the main shaft and located on the side of the impeller away from the water inlet, the ladder seal is sleeved on the main shaft and located between the impeller and the vacuum impeller.

[0005] The cross section of the ladder seal through the axis forms a ladder structure, comprising a first part and a second part formed integrally, wherein the first part and the second part are respectively provided with a first sealing groove and a second sealing groove around the own axis on the inner wall close to the main shaft.

[0006] Preferably, the outer wall of the first part is connected with the inner wall of the second part, the end face of the first part close to the second part abuts against the impeller, and the end face of the second part away from the first part abuts against the vacuum impeller.

[0007] Preferably, the impeller is provided with a mounting through hole penetrating along the own axis, one end of the main shaft is provided with a mounting hole along the own axis corresponding to the mounting through hole, and a fastener penetrating the mounting through hole and cooperating with the mounting hole is arranged to connect the impeller and the main shaft.

[0008] Preferably, the end of the impeller away from the water inlet abuts against the first part, and the outer wall surface connected with the end is configured as a sealing surface and cooperates with the second sealing groove.

[0009] Preferably, the main shaft is provided with a key groove on the outer wall corresponding to the vacuum impeller, and the vacuum impeller is connected with the main shaft through the key groove and rotates synchronously.

[0010] Preferably, the main shaft is sleeved with a shaft sleeve at one end close to the impeller, the shaft sleeve is threadedly connected with the main shaft, and the outer wall of the shaft sleeve serves as a positioning surface of the inner wall of the impeller, thereby facilitating the installation and positioning of the impeller.

[0011] Compared with the prior art, the utility model has the advantages of:

[0012] (1) The ladder seal design is provided, double-layer sealing effect is realized, the sealing performance of the water pump is significantly enhanced, and fluid leakage is effectively prevented.

[0013] (2) The impeller and the main shaft are connected through the fastener, synchronous rotation of the impeller is ensured, and the working stability of the water pump is improved. The vacuum impeller is connected with the main shaft through the key groove, synchronous rotation is also realized, and the pumping performance of the water pump is further improved. The design of the shaft sleeve not only simplifies the installation process of the impeller, but also improves the connection stability between the impeller and the main shaft. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be further described below in combination with the drawings and examples:

[0015] Figure 1 A structure diagram of the water pump with the ladder seal of the utility model is shown in Fig. 1.

[0016] Figure 2 A sectional view of the water pump with the ladder seal of the utility model is shown in Fig. 2.

[0017] Figure 3 A Figure 2 An enlarged view of position A in Fig. 1 is shown in Fig. 3.

[0018] Figure 4 A structure diagram of the ladder seal of the utility model is shown in Fig. 4.

[0019] Figure 5 A sectional view of the ladder seal of the utility model is shown in Fig. 5.

[0020] 1, main shaft, 2, housing, 21, water inlet, 22, water outlet, 3, impeller, 4, vacuum impeller, 5, ladder seal, 51, first part, 52, second part, 53, first sealing groove, 54, second sealing groove, 6, fastener, 7, key groove, 8, shaft sleeve. DETAILED DESCRIPTION

[0021] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0022] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0023] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0024] The content of the present application will be further described in detail below in conjunction with specific embodiments:

[0025] As shown in Figure 1 and Figure 2 A water pump with a stepped seal, comprising a main shaft 1 and a housing 2, the housing 2 has a water inlet 21 opened along the axial direction of the main shaft 1, and a water outlet 22 opened along the radial direction of the main shaft 1. One end of the main shaft 1 corresponding to the water inlet 21 is provided with an impeller 3, the impeller 3 is used to suck fluid from the water inlet 21 and discharge fluid from the water outlet 22 by the centrifugal force generated by the rotation of the main shaft 1. A vacuum impeller 4 is installed on the main shaft 1 away from the water outlet 22 side of the impeller 3, the vacuum impeller 4 is used to generate negative pressure when the impeller 3 works, further improving the pumping efficiency of the water pump.

[0026] As shown in Figure 3 - Figure 5As shown, a stepped seal 5 for sealing is sleeved on the main shaft 1 between the vacuum impeller 4 and the impeller 3. The stepped seal 5 has a stepped structure in cross section, including a first part 51 and a second part 52 formed integrally. The first part 51 and the second part 52 are respectively provided with a first sealing groove 53 and a second sealing groove 54 around their own axes on the inner wall of the main shaft 1. The first sealing groove 53 and the second sealing groove 54 are used to install sealing rings to achieve double-layer sealing and further enhance the sealing effect.

[0027] Specifically, the outer wall of the first part 51 is connected with the inner wall of the second part 52, the end face of the first part 51 close to the second part 52 abuts against the impeller 3, and the end face of the second part 52 away from the first part 51 abuts against the vacuum impeller 4. This structure design enables the stepped seal 5 to effectively separate the space between the impeller 3 and the vacuum impeller 4, preventing fluid leakage.

[0028] Regarding the installation mode of the impeller 3 and the main shaft 1: as shown, Figure 3 the impeller 3 is provided with a mounting through hole along its own axis, and the end of the main shaft 1 corresponding to the mounting through hole is provided with a mounting hole along its own axis, and the impeller 3 and the end of the main shaft 1 are connected by a fastener 6 (such as a bolt) penetrating through the mounting through hole and cooperating with the mounting hole. This connection mode ensures the synchronous rotation of the impeller 3 and the main shaft 1, improving the working stability of the water pump.

[0029] The end of the impeller 3 away from the water inlet 21 abuts against the first part 51, and the outer wall surface connecting the end is configured as a sealing surface and cooperates with the second sealing groove 54. This design further enhances the sealing effect between the impeller 3 and the stepped seal 5, preventing fluid leakage from the gap between the impeller 3 and the main shaft 1.

[0030] The main shaft 1 is provided with a key groove 7 corresponding to the outer wall of the vacuum impeller 4, and the vacuum impeller 4 is connected with the main shaft 1 through the key groove 7 and rotates synchronously. The key groove 7 connection mode ensures the synchronous rotation of the vacuum impeller 4 and the main shaft 1, improving the pumping efficiency of the water pump.

[0031] The end of the main shaft 1 close to the impeller 3 is sleeved with a shaft sleeve 8, and the shaft sleeve 8 is threadedly connected with the main shaft 1. The outer wall of the shaft sleeve 8 serves as a positioning surface of the inner wall of the impeller 3, facilitating the installation and positioning of the impeller 3. The design of the shaft sleeve 8 not only simplifies the installation process of the impeller 3, but also improves the connection stability between the impeller 3 and the main shaft 1.

[0032] When the main shaft 1 rotates, the impeller 3 sucks fluid from the water inlet 21 and discharges fluid from the water outlet 22 through centrifugal force. The vacuum impeller 4 generates negative pressure when the impeller 3 works, further improving the pumping efficiency of the water pump. The stepped seal 5 prevents fluid leakage through the sealing rings in the first sealing groove 53 and the second sealing groove 54, ensuring the efficient operation of the water pump.

[0033] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application, therefore, from any point of view, the examples should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A water pump with a stepped seal, characterized in that, The device includes a main shaft (1) and a housing (2). The housing (2) has an inlet (21) and an outlet (22) respectively opened along the axial and radial directions of the main shaft (1). The main shaft (1) is provided with an impeller (3) corresponding to the inlet (21). A vacuum impeller (4) is provided on the main shaft (1) on the side of the impeller (3) away from the inlet (21). The stepped seal (5) is sleeved on the main shaft (1) and located between the impeller (3) and the vacuum impeller (4). The stepped seal (5) forms a stepped structure through the cross section of the axis, including an integrally formed first part (51) and second part (52); wherein, the first part (51) and the second part (52) are respectively provided with a first sealing groove (53) and a second sealing groove (54) around their own axis on the inner wall of the first part (51) and the second part (52) near the main shaft (1).

2. A water pump with a stepped seal according to claim 1, characterized in that, The outer wall of the first part (51) is connected to the inner wall of the second part (52). The end face of the first part (51) near the second part (52) abuts against the impeller (3), and the end face of the second part (52) away from the first part (51) abuts against the vacuum impeller (4).

3. A water pump with a stepped seal according to claim 2, characterized in that, The impeller (3) has a through hole along its own axis. One end of the main shaft (1) has a mounting hole along its own axis corresponding to the through hole, and a fastener (6) that passes through the mounting hole and cooperates with the mounting hole connects the impeller (3) to the main shaft (1).

4. A water pump with a stepped seal according to claim 3, characterized in that, The impeller (3) is located at the end away from the inlet (21) and abuts against the first part (51), and the outer wall surface connected to this end is constructed as a sealing surface and corresponds to and cooperates with the second sealing groove (54).

5. A water pump with a stepped seal according to claim 4, characterized in that, The main shaft (1) has a keyway (7) on the outer wall corresponding to the vacuum impeller (4). The vacuum impeller (4) is connected to the main shaft (1) through the keyway (7) and rotates synchronously.

6. A water pump with a stepped seal according to claim 1, characterized in that, The main shaft (1) is fitted with a bushing (8) at one end near the impeller (3). The bushing (8) is threadedly connected to the main shaft (1), and the outer wall of the bushing (8) serves as the positioning surface of the inner wall of the impeller (3), which facilitates the installation and positioning of the impeller (3).

Images