Sewage pump with maintenance-free mechanical seal and bearing

Abstract

The utility model discloses a sewage pump with a mechanical seal and a bearing free of maintenance, which comprises a volute, a pump cover arranged at the top of the volute and a bearing bracket arranged above the pump cover, and the bearing and the mechanical seal are arranged in the bearing bracket. An automatic oil injection mechanism and an automatic grease injection mechanism are arranged on the volute; the automatic oil injection mechanism comprises an automatic oil injector and an oil injection pipeline; the automatic oil injector is arranged on the volute; one end of the oil injection pipeline is communicated with the automatic oil injector, and the other end of the oil injection pipeline is communicated with a mechanical seal cavity in a shaft seal chamber on the bearing bracket; the automatic grease injection mechanism comprises an automatic grease injector and a grease injection pipeline; the automatic grease injector is arranged on the volute; and one end of the grease injection pipeline is communicated with the automatic grease injector, and the other end of the grease injection pipeline is communicated with the bearing chamber on the bearing bracket. The utility model relates to a maintenance-free sewage pump with automatic oiling and fat liquoring functions, aiming at solving the problems in the prior art.

Description

Technical Field

[0001] The utility model relates to a sewage pump, and more specifically, to a sewage pump with maintenance-free mechanical seal and bearing. Background Art

[0002] Sewage pumps are often used in environments such as sewage and flood drainage pumping stations, where maintenance is inconvenient. The bearings and mechanical seals in sewage pumps generally use oil lubrication or grease lubrication, and these lubricating oils or greases need to be filled regularly. Currently, most are filled manually, which is time-consuming and laborious, and serious faults such as pump group damage will occur if the filling is not timely. Content of the Utility Model

[0003] Aiming at the above-mentioned defects existing in the prior art, the purpose of the utility model is to provide a sewage pump with maintenance-free mechanical seal and bearing, which has the functions of automatic oil filling and grease injection to solve the problems in the prior art.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A sewage pump with maintenance-free mechanical seal and bearing includes a volute, a pump cover installed on the top of the volute, and a bearing bracket installed above the pump cover. The bearing bracket is provided with a bearing and a mechanical seal inside.

[0006] An automatic oil injection mechanism and an automatic grease injection mechanism are provided on the volute.

[0007] The automatic oil injection mechanism includes an automatic oil injector and an oil injection pipeline.

[0008] The automatic oil injector is arranged on the volute.

[0009] One end of the oil injection pipeline is communicated with the automatic oil injector, and the other end is communicated with the mechanical seal cavity in the shaft seal chamber on the bearing bracket.

[0010] The automatic grease injection mechanism includes an automatic grease injector and a grease injection pipeline.

[0011] The automatic grease injector is arranged on the volute.

[0012] One end of the grease injection pipeline is communicated with the automatic grease injector, and the other end is communicated with the bearing chamber on the bearing bracket.

[0013] Preferably, an installation bracket is provided on the volute.

[0014] The automatic oil injector and the automatic grease injector are arranged on the installation bracket.

[0015] Preferably, an inclined oil injection hole is opened on the shaft seal chamber.

[0016] The outer end of the oil injection hole is communicated with the other end of the oil injection pipeline, and the inner end is communicated with the mechanical seal cavity.

[0017] Preferably, the grease injection pipeline includes an upper grease injection pipeline and a lower grease injection pipeline;

[0018] The bearing chamber includes an upper bearing chamber and a lower bearing chamber, corresponding to the upper grease injection pipeline and the lower grease injection pipeline respectively.

[0019] Preferably, an upper oil injection hole is provided on the upper bearing chamber;

[0020] The outer end of the upper oil injection hole is communicated with the other end of the upper grease injection pipeline, and an internal pipeline is connected to the inner end, and the internal pipeline leads to the inside of the inner bearing in the upper bearing chamber;

[0021] A lower oil injection hole is provided on the lower bearing chamber;

[0022] The outer end of the lower oil injection hole is communicated with the other end of the lower grease injection pipeline, and the inner end leads to the inside of the inner bearing in the lower bearing chamber.

[0023] Preferably, a protective cover plate is provided above the inner bearing in the lower bearing chamber and is fixed by being pressed tightly with a retaining ring;

[0024] A skeleton oil seal is provided below the inner bearing in the lower bearing chamber.

[0025] Preferably, a baffle is provided below the inner bearing in the upper bearing chamber, and a through hole is provided at the middle position of the baffle;

[0026] A concave ring is provided below the baffle;

[0027] Both the baffle and the concave ring are fixed by being pressed tightly with a retaining ring.

[0028] Preferably, the protective cover plate is made of thin steel plate.

[0029] Preferably, the baffle is made of thin steel plate.

[0030] A sewage pump with maintenance-free mechanical seal and bearing provided by the present utility model can accurately supply grease or lubricating oil to the sewage pump through an automatic oil injection mechanism and an automatic grease injection mechanism. When the sewage pump is running, the automatic injection mechanism is started and injection is carried out according to the consumption of grease; when the sewage pump is shut down, the automatic injection mechanism is closed. The operation is simple, the maintenance is convenient, and the use is reliable. Brief Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the sewage pump of the present utility model;

[0032] Figure 2 It is a schematic diagram of the bearing bracket in the sewage pump of the present utility model;

[0033] Figure 3 It is a schematic diagram of the automatic oil injection mechanism in the sewage pump of the present utility model;

[0034] Figure 4 It is a schematic diagram of the automatic grease injection mechanism in the sewage pump of the present utility model;

[0035] Figure 5 It is Figure 4 a schematic diagram of the lower grease injection pipeline;

[0036] Figure 6 It is Figure 4 a schematic diagram of the upper grease injection pipeline. Specific embodiments

[0037] In order to better understand the above technical solution of the present utility model, the technical solution of the present utility model will be further described below with reference to the drawings and embodiments.

[0038] Combined with Figure 1 and Figure 2 As shown, a sewage pump with maintenance-free mechanical seal and bearings provided by the present utility model includes a volute 1, a pump cover 2 arranged on the top of the volute 1, and a bearing bracket 3 arranged above the pump cover 2. Bearings and mechanical seals are installed in the bearing bracket 3, and these bearings and mechanical seals need to be regularly lubricated with oil or grease to ensure the normal operation of the rotor.

[0039] An automatic oil injection mechanism 4 and an automatic grease injection mechanism 5 are arranged on the volute 1. The automatic oil injection mechanism 4 is used to inject oil into the mechanical seal cavity 6; the automatic grease injection mechanism 5 is used to inject grease into the upper bearing chamber 7 and the lower bearing chamber 8.

[0040] Combined with Figure 3 As shown, the automatic oil injection mechanism 4 includes an automatic oil injector 401, an oil injection pipeline 402, and an inclined oil injection hole is opened on the shaft seal chamber 9.

[0041] The automatic oil injector 401 is installed on the mounting bracket 101 on the volute 1.

[0042] One end of the oil injection pipeline 402 is communicated with the automatic oil injector 401, and the other end is communicated with the outer end of the oil injection hole.

[0043] The inner end of the oil injection hole is communicated with the mechanical seal cavity 6.

[0044] When the lubricating oil in the mechanical seal chamber 6 is consumed and the oil level drops to a certain position, the lubricating oil in the automatic oil injector 401 will be automatically injected into the mechanical seal chamber 6 through the oil injection pipeline 402 to lubricate the mechanical seal 10, eliminating the need for manual oil injection.

[0045] Combined Figures 4 to 6 As shown, the bearing components on the bearing bracket 3 include the upper bearing 11 located in the upper bearing chamber 7 and the lower bearing 12 located in the lower bearing chamber 8, which are composed of two parts of rolling bearings and are lubricated with grease.

[0046] The automatic grease injection mechanism 5 includes an automatic grease injector 501, an upper grease injection pipeline 502 and a lower grease injection pipeline 503, an upper oil injection hole 504 opened on the upper bearing chamber 7, and a lower oil injection hole 505 opened on the lower bearing chamber 8.

[0047] The automatic grease injector 501 is installed on the mounting bracket 101 on the volute 1.

[0048] One end of the lower grease injection pipeline 503 is connected to the automatic grease injector 501, and the other end is connected to the outer end of the lower oil injection hole 505.

[0049] An internal pipeline 506 is connected to the inner end of the lower oil injection hole 505, and the internal pipeline 506 leads into the interior of the lower bearing 12.

[0050] When a certain amount of grease in the lower bearing chamber 8 is consumed, the automatic grease injector 501 enters the lower oil injection hole 505 through the lower grease injection pipeline 503, and then is injected into the interior of the lower bearing 12 through the internal pipeline 506. To prevent the grease from being thrown out during operation, a protective cover plate 507 is installed above the lower bearing 12. The protective cover plate 507 is made of thin steel plate and is fixed tightly by a retaining ring 508. Below the lower bearing 12, a skeleton oil seal 509 is provided at the position where it mates with the shaft to prevent the grease from leaking out from the bottom.

[0051] One end of the upper grease injection pipeline 502 is connected to the automatic grease injector 501, and the other end is connected to the outer end of the upper oil injection hole 504.

[0052] The inner end of the upper oil injection hole 504 leads into the interior of the upper bearing 11.

[0053] After a certain amount of grease is consumed in the upper bearing chamber 7, the automatic grease injector 501 enters the upper oil injection hole 504 through the upper grease injection pipe 502, and then the grease is injected into the upper bearing 11 along the upper oil injection hole 504. To prevent the grease from leaking downward from the bottom, a baffle 510 is provided below the upper bearing 11. The baffle 510 is made of thin steel plate and has an opening in the middle. When a small amount of grease flows out, it can flow down through the hole in the middle of the baffle 510 and enter the concave ring 511 below the baffle 510. The concave ring 511 is used to collect a small amount of grease leaked from the upper bearing 11 and prevent the grease from flowing into the lower bearing. The baffle 510 and the concave ring 511 are respectively installed and fixed by retaining rings 512 and 513.

[0054] An installation bracket 101 is connected to the volute 1 by bolts. The automatic oil injector 401 and the automatic grease injector 501 are both fixed on the installation bracket 101, which is convenient for installation and use.

[0055] The automatic oil injection mechanism 4 and the automatic grease injection mechanism 5 can accurately supply grease or lubricating oil to the sewage pump of the present utility model. When the sewage pump is running, the automatic oil injection mechanism 4 and the automatic grease injection mechanism 5 are started and filled according to the consumption of the grease; when the sewage pump stops, the automatic oil injection mechanism 4 and the automatic grease injection mechanism 5 are closed. The operation is simple, the maintenance is convenient, and the use is reliable.

[0056] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present utility model and are not used as a limitation to the present utility model. As long as it is within the scope of the essential spirit of the present utility model, the changes and modifications to the above embodiments will fall within the scope of the claims of the present utility model.

Claims

1. A sewage pump with maintenance-free mechanical seal and bearing, comprising a volute, a pump cover provided at the top of the volute, and a bearing bracket provided above the pump cover. A bearing and a mechanical seal are provided in the bearing bracket. It is characterized in that: An automatic oil injection mechanism and an automatic grease injection mechanism are provided on the volute; The automatic oil injection mechanism includes an automatic oil injector and an oil injection pipeline; The automatic oil injector is provided on the volute; One end of the oil injection pipeline is communicated with the automatic oil injector, and the other end is communicated with the mechanical seal cavity in the shaft seal chamber on the bearing bracket; The automatic grease injection mechanism includes an automatic grease injector and a grease injection pipeline; The automatic grease injector is provided on the volute; One end of the grease injection pipeline is communicated with the automatic grease injector, and the other end is communicated with the bearing chamber on the bearing bracket.

2. The sewage pump with maintenance-free mechanical seal and bearing according to claim 1, characterized in that: An installation bracket is provided on the volute; The automatic oil injector and the automatic grease injector are provided on the installation bracket.

3. The sewage pump with maintenance-free mechanical seal and bearing according to claim 1, characterized in that: An inclined oil injection hole is opened on the shaft seal chamber; The outer end of the oil injection hole is communicated with the other end of the oil injection pipeline, and the inner end is communicated with the mechanical seal cavity.

4. The sewage pump with maintenance-free mechanical seal and bearing according to claim 1, characterized in that: The grease injection pipeline includes an upper grease injection pipeline and a lower grease injection pipeline; The bearing chamber includes an upper bearing chamber and a lower bearing chamber, corresponding to the upper grease injection pipeline and the lower grease injection pipeline respectively.

5. The sewage pump with maintenance-free mechanical seal and bearing according to claim 4, characterized in that: An upper oil injection hole is opened on the upper bearing chamber; The outer end of the upper oil injection hole is communicated with the other end of the upper grease injection pipeline, and an inner pipeline is connected to the inner end. The inner pipeline leads into the interior of the bearing in the upper bearing chamber; A lower oil injection hole is opened on the lower bearing chamber; The outer end of the lower oil injection hole is communicated with the other end of the lower grease injection pipeline, and the inner end leads into the interior of the bearing in the lower bearing chamber.

6. The sewage pump with maintenance-free mechanical seal and bearing according to claim 5, characterized in that: A protective cover plate is provided above the bearing in the lower bearing chamber and is fixed by being pressed with a retaining ring; A skeleton oil seal is provided below the bearing in the lower bearing chamber.

7. The sewage pump with maintenance-free mechanical seal and bearing according to claim 5, characterized in that: A baffle is provided below the bearing in the upper bearing chamber, and a through hole is opened at the middle position of the baffle; A concave ring is provided below the baffle; Both the baffle and the concave ring are fixed by being pressed with a retaining ring.

8. The sewage pump with maintenance-free mechanical seal and bearing according to claim 6, characterized in that: The protective cover plate is made of thin steel plate.

9. The sewage pump with maintenance-free mechanical seal and bearing according to claim 7, characterized in that: The baffle is made of thin steel plate.

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