Low-cavitation-allowance air cooling pump

Abstract

The utility model discloses a low-cavitation-allowance air cooling pump, which relates to the technical field of circulating pumps, and particularly structurally comprises a pump shaft, the bearing assembly is mounted on the pump shaft; the suspension is mounted on the pump shaft, and one end of the suspension is matched with the bearing assembly; the pump shaft is sleeved with the pump body assembly, and the pump body assembly is matched with the end of the suspension. The inducer is mounted on the pump shaft, and the inducer is located in the pump body assembly; the wear-resistant ring is arranged on the inner wall of the pump body assembly, and the wear-resistant ring is located on the outer side of the inducer; the impeller is installed on the pump shaft and located on the side, facing the suspension, of the inducer. The technical problem that an existing pump body is insufficient in cavitation resistance after working for a long time is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circulating pump technical field especially low gas cavitation allowance air cooled pump. BACKGROUND

[0002] The hot water circulating pump is the core equipment of the heat supply system, heating ventilation air conditioning (HVAC) and industrial heat recovery, specifically, is the place of hot water / heat medium delivery through the pipeline system or tank system, especially suitable for large and medium-sized heat supply system, and its technical development has long faced the following technical bottlenecks, which restricts the improvement of system energy efficiency and reliability.

[0003] The existing hot water circulating pump is only installed with an impeller in the pump body, and in actual work, it is found that the gas cavitation allowance is high, and the general method is to install an inducer on the pump shaft to reduce the gas cavitation allowance, but the long-time work of the inducer will affect the inner wall of the pump body, resulting in insufficient gas cavitation resistance and unable to ensure the stable long-time work of the circulating pump. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a low gas cavitation allowance air cooled pump, which solves the technical problem of insufficient gas cavitation resistance of the pump body after long-time work in the prior art.

[0005] The embodiment of the application discloses a low gas cavitation allowance air cooled pump, which is characterized by comprising:

[0006] A pump shaft;

[0007] A bearing assembly installed on the pump shaft;

[0008] A suspension installed on the pump shaft, and one end of the suspension is matched with the bearing assembly;

[0009] A pump body assembly sleeved on the pump shaft, and the pump body assembly is matched with the end of the suspension;

[0010] An inducer installed on the pump shaft, and the inducer is located inside the pump body assembly;

[0011] A wear-resistant ring arranged on the inner wall of the pump body assembly, and the wear-resistant ring is located outside the inducer;

[0012] An impeller installed on the pump shaft, and the impeller is located on the side of the inducer facing the suspension.

[0013] The pump body is designed in the application, that is, the wear-resistant ring is arranged, so that the gas cavitation resistance of the pump body can be improved.

[0014] On the basis of the above technical scheme, the embodiment of the application can also be improved as follows:

[0015] Further, a gap of no more than 0.5mm is left between the outer wall of the inducer and the inner wall of the wear ring, and the beneficial effect of this step is that the anti-cavitation ability can be improved through the smaller gap.

[0016] Further, the pump body assembly comprises:

[0017] A pump cover is sleeved on the pump shaft, and the end of the pump cover is connected to the side of the suspension away from the suspension;

[0018] A pump body is sleeved on the pump shaft, and the end of the pump body is connected to the side of the pump cover away from the suspension, and the beneficial effect of this step is that the corresponding components cooperate to realize the function of the pump body.

[0019] Further, a drain groove is formed on the side of the pump cover away from the suspension, and the beneficial effect of this step is that the drain groove can prevent foreign matter from entering.

[0020] Further, the drain groove extends inward in a spiral manner, and the beneficial effect of this step is that the foreign matter can be thrown out, thereby ensuring the stable operation of the pump body.

[0021] Further, the bearing assembly is a water bearing assembly, and the beneficial effect of this step is that the water bearing assembly ensures the stable operation of each component.

[0022] Further, a spring pad is arranged between the water bearing assembly and the impeller, and the beneficial effect of this step is that the spring pad can protect the water bearing assembly.

[0023] Further, a fan is installed at the end of the pump shaft, and the beneficial effect of this step is that the fan can achieve a cooling effect.

[0024] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0025] 1. The present application adds a wear ring, which cooperates with the inducer to reduce the cavitation allowance and improve the anti-cavitation ability.

[0026] 2. The pump cover of the present application is designed with a drain groove to prevent foreign matter from entering, thereby protecting the bearing.

[0027] 3. The present application also provides a spring pad to protect the water bearing assembly and prevent damage to the water bearing assembly during movement. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0029] Figure 1 A structure diagram of a low-cavitation margin air-cooled pump according to the embodiments of the present application;

[0030] Figure 2 A structure diagram of a pump cover according to the embodiments of the present application; Figure 1 A structure diagram of an inducer according to the embodiments of the present application;

[0031] Figure 3 A structure diagram of a pump cover according to the embodiments of the present application; Figure 1 A structure diagram of an inducer according to the embodiments of the present application;

[0032] Reference signs:

[0033] 1-pump shaft; 2-bearing assembly; 3-suspension; 4-pump body assembly; 5-inducer; 6-wear ring; 7-impeller; 8-elastic pad; 9-fan;

[0034] 401-pump cover; 402-pump body; 403-drainage groove; 404-lubrication channel. DETAILED DESCRIPTION

[0035] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0036] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meanings understood by the skilled in the art to which the present application belongs.

[0037] In the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0038] In order to better understand the above technical solutions, the above technical solutions will be described in detail below with reference to the drawings in the specification and the specific embodiments.

[0039] Embodiments:

[0040] As Figures 1-3 shown, the embodiment of the present application discloses a low cavitation margin air-cooled pump, the air-cooled pump is designed, compared with the existing air-cooled pump, an inducer is installed at one end of the impeller, the cavitation margin can be reduced through the inducer; in order to further ensure that the part structure can stably operate and further reduce the cavitation margin, the present application also provides a wear-resistant ring which cooperates with the outer wall of the inducer, so as to further reduce the cavitation margin; the pump shaft in the present application may move during work, in order to avoid damage to the bearing assembly due to impact, the present application also provides a spring washer, so as to play a buffering role.

[0041] As Figure 1 , 2 shown, the specific structure of the present application includes:

[0042] The pump shaft 1 is the existing pump shaft, which will not be described here;

[0043] The bearing assembly 2 is installed on the pump shaft 1, which is convenient for realizing stable rotation;

[0044] The suspension 3 is installed on the pump shaft 1, and one end of the suspension 3 cooperates with the bearing assembly 2, the suspension 3 can separate the hot running area and the air-cooled sealing cavity, so as to ensure stable movement, as shown in the specific figure, see Figure 1 the left and right ends;

[0045] The pump body assembly 4 is sleeved on the pump shaft 1, and the pump body assembly 4 cooperates with the end of the suspension 3, the pump body assembly 4 has impellers and other components inside to realize the function of the pump body itself;

[0046] The inducer 5 is installed on the pump shaft 1, and the inducer 5 is located inside the pump body assembly 4, the inducer 5 is specifically located at the left end of the pump body, so as to reduce the cavitation margin;

[0047] The wear-resistant ring 6 is arranged on the inner wall of the pump body assembly 4, and the wear-resistant ring 6 is located outside the inducer 5, the wear-resistant ring 6 cooperates with the inducer 5, and a gap is left between the inner wall of the wear-resistant ring 6 and the outer wall of the inducer 5, so as to further reduce the cavitation margin and ensure that the present application works stably for a long time; at the same time, the wear-resistant ring 6 can not only play a supporting and anticorrosion role, but also improve the anti-cavitation ability of the pump body;

[0048] Impeller 7, mounted on the pump shaft 1, and the inducer 5 side of the suspension 3, the impeller 7 as the main working element of the pump body, its non-working surface is provided with back blade, so as to reduce the mechanical seal on the axial thrust and pressure

[0049] In order to ensure the stability of the working state, the gap is controlled, that is, the gap between the outer wall of the inducer 5 and the inner wall of the wear ring 6 is not more than 0.5mm, through the smaller gap, the anti cavitation effect can be improved.

[0050] Further to the specific structure of the pump body assembly, the pump body assembly 4 in the application comprises:

[0051] Pump cover 401, set in the pump shaft 1, and the pump cover 401 and the end of the suspension 3 are connected;

[0052] Pump body 402, set in the pump shaft 1, and the end of the pump body 402 is connected with the side of the pump cover 401 away from the suspension 3; the pump body 402 and the pump cover 401 in the application cooperate with each other, wherein the pump cover 401 is located at one end of the pump body 402, and the pump body 402 is provided with inducer and impeller and other components.

[0053] In order to avoid the sundries into the bearing, the pump cover 401 is further designed, as shown in Figure 3 Specifically, the pump cover 401 away from the side of the suspension 3 is provided with a sewage groove 403.

[0054] Specifically, the sewage groove 403 extends inwardly in a spiral, forming centrifugal force in working, so as to throw out sundries, which is beneficial to ensure the stable working of the device.

[0055] Specifically, the pump cover 401 in the application is further provided with a lubricating channel 404, which is inclined on the pump cover 401, and the end thereof corresponds to the bearing assembly; the lubricating channel 404 can play the role of flushing and lubrication, avoiding the damage of water bearing assembly (SIC material) due to sundries.

[0056] Specifically, the bearing assembly 2 in the application is a water bearing assembly, and the water bearing assembly and the impeller 7 are provided with a spring pad 8, which has resilience, preventing the rotor from moving and breaking the water bearing, so as to ensure the stable working of the whole device.

[0057] Specifically, the end of the pump shaft 1 is provided with a fan 9, which can provide cooling air flow.

[0058] Further to the application:

[0059] The application discloses a forced lubrication boiler, and relates to the technical field of water circulating pumps.

[0060] In the working process, the right part of the suspension 3, including the fan and other components, starts to work to ensure continuous cooling airflow, and the pump body assembly 4 is the impeller 7 and the inducer 5, which start to work to facilitate the stable movement of fluid; the wear-resistant ring 6 can support and ensure the stable working of the inducer 5.

[0061] In the description of the specification, a large number of specific details are described. However, it can be understood that the embodiments of the application can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the specification.

[0062] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0063] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical scheme of the application, and not to limit it; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the application, and they should be covered in the scope of the claims and the specification of the application.

Claims

1. A low-cavitation-margin air-cooled pump, characterized by, The utility model relates to a pump, comprising: a pump shaft (1); a bearing assembly (2) mounted on the pump shaft (1); a suspension (3) mounted on the pump shaft (1), and one end of the suspension (3) is matched with the bearing assembly (2); a pump body assembly (4) sleeved on the pump shaft (1), and the pump body assembly (4) is matched with the end of the suspension (3); an inducer (5) mounted on the pump shaft (1), and the inducer (5) is located inside the pump body assembly (4); a wear ring (6) arranged on the inner wall of the pump body assembly (4), and the wear ring (6) is located outside the inducer (5); an impeller (7) mounted on the pump shaft (1), and the impeller (7) is located on the side of the inducer (5) facing the suspension (3).

2. The low-cavitation-margin air-cooled pump of claim 1, wherein, The gap between the outer wall of the inducer (5) and the inner wall of the wear ring (6) is not more than 0.5mm.

3. The low-cavitation-margin air-cooled pump of claim 1, wherein, The pump body assembly (4) comprises: a pump cover (401) sleeved on the pump shaft (1), and the pump cover (401) is connected with the end of the suspension (3); a pump body (402) sleeved on the pump shaft (1), and the end of the pump body (402) is connected with the side of the pump cover (401) away from the suspension (3).

4. The low-cavitation-margin air-cooled pump of claim 3, wherein, The side of the pump cover (401) away from the suspension (3) is provided with a sewage groove (403).

5. The low-cavitation-margin air-cooled pump of claim 4, wherein, The sewage groove (403) extends spirally inward.

6. The low-cavitation-margin air-cooled pump of claim 1, wherein, The bearing assembly (2) is a water bearing assembly.

7. The low-cavitation-margin air-cooled pump of claim 6, wherein, A spring pad (8) is arranged between the water bearing assembly and the impeller (7).

8. The low-cavitation-margin air-cooled pump of claim 1, wherein, A fan (9) is mounted at the end of the pump shaft (1).

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