Novel horizontal centrifugal pump

Abstract

The utility model provides a novel horizontal centrifugal pump which comprises a pump body, an impeller and a pump cover, the pump body and the pump cover are connected to form a pump cavity, a water inlet is formed in the end face of the pump body, a water outlet is formed in the upper end face of the pump body, the impeller is arranged in the pump cavity, and one end of the impeller is connected with a motor through a pump shaft which penetrates through the pump cover and is rotationally connected with the pump cover. A mechanical sealing piece is installed on the inner wall, close to the pump shaft, of the pump cover, a cooling channel is formed in the pump cover, one end of the cooling channel communicates with the pump cavity, and the other end of the cooling channel is arranged at the position close to the mechanical sealing piece. The cooling device is compact in structure, the pump cavity and the mechanical sealing piece are communicated through the cooling channel, the conveying amount of high-pressure medium solution drained to the mechanical sealing piece is increased, the cooling effect of the mechanical sealing piece can be greatly improved under the condition that conveying media do not leak out, and the service life of the mechanical sealing piece is effectively prolonged; and the condition of leakage caused by mechanical seal high temperature is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a new type of horizontal centrifugal pump. Background Art

[0002] For the horizontal centrifugal pump without external cooling water in the power plant, the cavity space of the mechanical seal chamber is limited, and the amount of the medium solution entering the mechanical seal chamber is insufficient, resulting in insufficient cooling of the mechanical seal, high temperature during operation, and further dry friction high temperature burning of the O-ring and silicon carbide seal ring, causing frequent leakage problems of the mechanical seal.

[0003] The existing patent (CN216157955U) for a centrifugal pump sealing device and a centrifugal pump discloses a component for adding external cooling water, which can effectively improve the cooling effect of the mechanical seal. However, part of the transported medium will flow out along with the cooling water. When the transported medium does not allow external leakage, the method of external cooling water cannot be implemented. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a new type of horizontal centrifugal pump to solve the above technical problems.

[0005] The utility model provides a new type of horizontal centrifugal pump, including a pump body, an impeller and a pump cover. The pump body and the pump cover are connected to form a pump cavity. An inlet is provided at the end face of the pump body, and an outlet is provided at the upper end face of the pump body. The impeller is arranged in the pump cavity. One end of the impeller is connected to a motor through a pump shaft that penetrates the pump cover and is rotatably connected to the pump cover. A mechanical seal is installed on the inner wall of the pump cover near the pump shaft. A cooling channel is provided on the pump cover. One end of the cooling channel communicates with the pump cavity, and the other end is arranged near the mechanical seal.

[0006] Further, a mechanical seal chamber is provided on the inner wall of the pump cover near the pump shaft, and the mechanical seal is installed in the mechanical seal chamber.

[0007] Further, the mechanical seal chamber is annularly provided.

[0008] Further, the cooling channel communicates the pump cavity with the mechanical seal chamber.

[0009] Further, the impeller and the inlet are coaxially arranged.

[0010] Further, a mechanical seal gland is installed at one end of the pump cover away from the impeller.

[0011] Further, an intermediate bracket installed on the pump body is provided outside the pump cover, and the pump shaft penetrates the intermediate bracket and is rotatably connected to the intermediate bracket.

[0012] Further, the pump shaft is connected to the motor through a coupling.

[0013] Further, a bearing housing is installed on the pump shaft, and the pump body and the bottom of the bearing housing are respectively installed on the base through support plates.

[0014] Further, the pump shaft is rotatably connected to the bearing housing through a bearing, and bearing gland plates are arranged on both sides of the bearing.

[0015] The utility model has a compact structure. By providing a cooling channel to connect the pump chamber and the mechanical seal, the delivery volume of the high-pressure medium solution flowing to the mechanical seal is increased. It can greatly improve the cooling effect of the mechanical seal without leakage of the transported medium, effectively extend the service life of the mechanical seal, and avoid the leakage caused by the high temperature of the mechanical seal. Description of the Drawings

[0016] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Description of the Reference Numerals:

[0019] In the figure: 1 - pump body, 2 - impeller, 3 - pump cover, 31 - cooling channel, 4 - shaft sleeve, 5a - mechanical seal chamber, 5b - mechanical seal gland, 6 - intermediate support, 7 - left bearing gland plate, 8 - left bearing, 9 - bearing housing, 10 - pump shaft, 11 - right bearing, 12 - right bearing gland plate, 13 - support plate, 14 - pump coupling, 15 - motor coupling, 16 - motor, 17 - base; Detailed Embodiments

[0020] The following will clearly and completely describe the technical solutions of the present utility model in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined. In addition, the terms "installation", "connection", and "connection" should 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 directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. 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.

[0023] Embodiment 1

[0024] As Figure 1 shown:

[0025] A new type of horizontal centrifugal pump includes a pump body 1 and a pump cover 3. The pump body 1 and the pump cover 3 are connected to form a pump chamber. An inlet is provided on the end face of the pump body 1, and an outlet is provided on the upper end face of the pump body 1.

[0026] An impeller 2 is arranged in the pump chamber, and the impeller 2 is coaxially arranged with the inlet.

[0027] One end of the impeller 2 is connected to a motor 16 through a pump shaft 10. The pump shaft 10 penetrates through the pump cover 3 and is rotatably connected to the pump cover 3. The impeller 2 rotates under the drive of the motor 16, pumping the medium at the inlet to the outlet to achieve the transportation of the medium.

[0028] A shaft sleeve 4 is arranged between the pump shaft 10 and the pump cover 3 and is installed on the outer peripheral surface of the pump shaft 10.

[0029] A mechanical seal chamber 5a is provided on the inner wall of the pump cover 3 close to the pump shaft 10. The mechanical seal chamber 5a is arranged at a position close to the end face of the pump cover 3 away from the impeller 2. The mechanical seal chamber 5a is annularly provided, and a mechanical seal gland 5b is installed at one end of the pump cover 3 away from the impeller 2.

[0030] A mechanical seal is installed in the mechanical seal chamber 5a for sealing the pump chamber.

[0031] A cooling channel 31 is provided on the pump cover 3. The cooling channel 31 communicates the pump chamber with the mechanical seal chamber 5a. One end of the cooling channel 31 communicates with the pump chamber, and the other end of the cooling channel 31 is arranged at a position close to the mechanical seal.

[0032] By providing the cooling channel 31, the delivery volume of the high-pressure medium solution drained to the mechanical seal is increased, which can greatly improve the cooling effect of the mechanical seal without leakage of the transported medium, effectively extend the service life of the mechanical seal, and avoid the situation of leakage caused by high temperature of the mechanical seal.

[0033] An intermediate bracket 6 installed on the pump body 1 is provided outside the pump cover 3. The pump shaft 10 passes through the intermediate bracket 6 and is rotatably connected to the intermediate bracket 6.

[0034] A bearing seat 9 is arranged on the pump shaft 10. The bearing seat 9 is detachably connected to the intermediate bracket 6.

[0035] The pump shaft 10 is rotatably connected to the bearing seat 9 through a left bearing 8 and a right bearing 11. A left bearing gland 7 is arranged on the left side of the left bearing 8. The left bearing gland 7 is detachably connected to the outer wall of the bearing seat 9. A right bearing gland 12 is arranged on the right side of the right bearing 11. The right bearing gland 12 is detachably connected to the outer wall of the bearing seat 9.

[0036] The pump shaft 10 is connected to the motor 16 through a pump coupling 14 and a motor coupling 15.

[0037] The bottoms of the pump body 1 and the bearing seat 9 are respectively installed on the base 17 through a support plate 13.

[0038] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A new type of horizontal centrifugal pump, characterized in that It includes a pump body, an impeller and a pump cover. The pump body and the pump cover are connected to form a pump chamber. An inlet is provided on the end face of the pump body, and an outlet is provided on the upper end face of the pump body. The impeller is arranged in the pump chamber. One end of the impeller is connected to a motor through a pump shaft that penetrates the pump cover and is rotatably connected to the pump cover. A mechanical seal is installed on the inner wall of the pump cover near the pump shaft. A cooling channel is provided on the pump cover. One end of the cooling channel communicates with the pump chamber, and the other end is arranged at a position near the mechanical seal.

2. The novel horizontal centrifugal pump according to claim 1, characterized in that, A mechanical seal chamber is provided on the inner wall of the pump cover near the pump shaft, and the mechanical seal is installed in the mechanical seal chamber.

3. The novel horizontal centrifugal pump according to claim 2, wherein, The mechanical seal chamber is annularly provided.

4. The novel horizontal centrifugal pump according to claim 2, wherein, The cooling channel communicates the pump chamber with the mechanical seal chamber.

5. The novel horizontal centrifugal pump according to claim 1, characterized in that, The impeller is coaxially arranged with the inlet.

6. The novel horizontal centrifugal pump according to claim 1, characterized in that, A mechanical seal gland is installed at one end of the pump cover away from the impeller.

7. The novel horizontal centrifugal pump according to claim 1, characterized in that, An intermediate bracket installed on the pump body is provided outside the pump cover. The pump shaft penetrates the intermediate bracket and is rotatably connected to the intermediate bracket.

8. The novel horizontal centrifugal pump according to claim 1, wherein The pump shaft is connected to the motor through a coupling.

9. The novel horizontal centrifugal pump according to claim 1, characterized in that, A bearing seat is installed on the pump shaft. The bottom parts of the pump body and the bearing seat are respectively installed on a base through support plates.

10. The novel horizontal centrifugal pump according to claim 9, characterized in that, The pump shaft is rotatably connected to the bearing seat through a bearing, and bearing glands are provided on both sides of the bearing.

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