Centrifugal water pump bearing box oil discharge structure

Abstract

The utility model provides a centrifugal water pump bearing box oil -draining structure belongs to water pump technical field. It has solved the problem of slow oil -draining efficiency of existing oil -draining structure. In the utility model, the bearing box includes the box body of horizontal arrangement and the barrel shape, is equipped with the oil collecting groove in the low point position of box body inner wall, and the oil -draining structure includes the switch valve, and the switch valve includes the tubular entering end of vertical setting, and the threaded hole no. The entering end is connected in threaded hole no. The support seat is fixed in the entering end upper end, and the support seat will not isolate the entering end bore and the oil collecting groove, and the support seat top has the vertical setting's locating rod, and the locating rod upper end projects into the entering end and is in the oil collecting groove, and the locating rod upper end coaxially fixed has the magnetic block of columnar, and the magnetic block outer diameter is less than threaded hole no. The centrifugal water pump bearing box oil -draining structure can speed up the oil -draining efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology, and relates to a centrifugal water pump, particularly an oil draining structure for a centrifugal water pump bearing housing. Background Technology

[0002] In a centrifugal pump, a bearing housing is used to support the pump shaft. Its specific structure is as disclosed in the Chinese Patent Database (CN211059057U), which includes a housing body. The bottom of the housing body is provided with a left and a right oil baffle plate, which are axially arranged. The bottom surfaces on both sides of the oil outlet of the housing body are inclined downwards from both ends towards the oil outlet, forming an inclined bottom surface. The left end of the left oil baffle plate is fixedly connected to the left end face of the housing body, and the lower end is fixedly connected to the inclined bottom surface. The upper surface of the left oil baffle plate is inclined downwards from the left end of the housing body towards the oil outlet side, deviating from the horizontal. A left oil passage hole is provided between the left oil baffle plate and the bottom surface of the housing body. The right end of the right oil baffle plate is fixedly connected to the right end face of the housing body, and the lower end is fixedly connected to the inclined bottom surface of the housing body. The upper surface of the right oil baffle plate is inclined downwards from the right end of the housing body towards the other side of the oil outlet, deviating from the horizontal. A right oil passage hole is provided between the right oil baffle plate and the bottom surface of the housing body. A permanent magnet is fixed to the end of the valve plug at the oil outlet of the housing body.

[0003] In the aforementioned bearing housing, the permanent magnet is hollow and located at the valve plug inlet. Since the permanent magnet itself is not very large in actual products, the iron filings adsorbed on it can easily clog the inner hole of the permanent magnet, hindering the discharge of machine oil from the housing and affecting efficiency. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a highly efficient oil draining structure for centrifugal water pump bearing housings.

[0005] The objective of this utility model can be achieved through the following technical solution: A centrifugal water pump bearing housing oil draining structure, the bearing housing comprising a horizontally arranged cylindrical body, an oil collection groove at the lowest point of the inner wall of the body, the oil draining structure comprising a switch valve, the switch valve comprising a vertically arranged tubular inlet end, a threaded hole being vertically opened on the bottom wall of the oil collection groove, and the inlet end being threadedly connected to the threaded hole, characterized in that a support base is fixed inside the upper end of the inlet end, and the support base does not isolate the inner hole of the inlet end from the oil collection groove; a vertically arranged positioning rod is provided at the top of the support base, the upper end of the positioning rod extending out of the inlet end and positioned in the oil collection groove; a columnar magnetic block is coaxially fixed to the upper end of the positioning rod, and the outer diameter of the magnetic block is smaller than the diameter of the threaded hole.

[0006] The process of changing the engine oil in the housing is as follows: First, open the switch valve to drain the engine oil from the housing. After the engine oil has been mostly drained, unscrew the switch valve to allow the magnetic block to extend out of the housing. Then, clean off the iron filings attached to the magnetic block, and finally screw the switch valve back in.

[0007] With the cooperation of the support base and the positioning rod, the magnetic block is positioned in the oil collection groove and there is a certain distance between it and the upper port of the inlet end of the switch valve. This way, even if a lot of iron filings are attached to the magnetic block, it will not hinder the oil in the housing from entering the switch valve, ensuring that the oil can always be discharged smoothly through the switch valve. It has the advantages of high oil discharge efficiency and convenience.

[0008] In the above-mentioned centrifugal water pump bearing housing oil draining structure, the support base includes a circular ring and a support block coaxially disposed within the circular ring. The support block is connected to the inner wall of the circular ring by a ring of spokes, and an oil passage is formed between two adjacent spokes. The circular ring is fixed on the inner wall of the inlet end, and the positioning rod is disposed on the support block.

[0009] In the aforementioned centrifugal water pump bearing housing oil drain structure, an annular step matching the ring body is formed on the inner wall of the inlet end. The ring body is inserted into the annular step and pressed against the bottom wall of the annular step. The support seat is positioned inside the inlet end by a press-fit method, which has the advantages of convenient and easy assembly.

[0010] In the aforementioned centrifugal water pump bearing housing oil draining structure, the magnetic block is hollow with openings at both ends, and its lower end is fitted and fixed to the positioning rod. Using a hollow magnetic block effectively increases its adsorption area, thus better removing iron filings from the oil.

[0011] In the above-mentioned centrifugal water pump bearing housing oil draining structure, the upper outer wall of the positioning rod is provided with an annular positioning step, and the positioning step is coaxial with the positioning rod; the lower end of the magnetic block is inserted into the positioning step and pressed against the bottom wall of the positioning step.

[0012] In the above-mentioned centrifugal water pump bearing housing oil draining structure, the support block has a vertically penetrating threaded hole two, and the lower end of the positioning rod is threaded into the threaded hole two, so as to facilitate the disassembly and assembly of the whole consisting of the positioning rod and the magnetic block, and to facilitate the cleaning of the magnetic block.

[0013] In the above-mentioned centrifugal water pump bearing housing oil drain structure, an annular groove is provided on the outer wall of the inlet end, and an O-ring is provided in the annular groove. The outer circumferential surface of the O-ring contacts and seals with the inner wall of the threaded hole to facilitate the disassembly and assembly of the valve.

[0014] In the aforementioned centrifugal water pump bearing housing oil drain structure, the housing is cylindrical, with both ends of the housing having a circular inner wall (surface one) and the middle inner wall including a circular inner wall (surface two). The diameter of circular inner wall one is larger than that of circular inner wall two, and both circular inner walls one are connected to circular inner wall two via conical surfaces. The aforementioned oil collection groove is located on circular inner wall two. This design allows the engine oil to enter the oil collection groove more quickly and smoothly, improving oil draining efficiency.

[0015] In the aforementioned centrifugal water pump bearing housing oil drain structure, the oil collection groove is an arc shape coaxial with the housing body.

[0016] Compared with existing technologies, the oil draining structure of this centrifugal water pump bearing housing has the following advantages: 1. With the cooperation of the support base and the positioning rod, the magnetic block is placed in the oil collection groove and there is a certain distance between it and the upper port of the inlet end of the switch valve. This way, even if a lot of iron filings are attached to the magnetic block, it will not hinder the oil in the housing from entering the switch valve, ensuring that the oil can always be discharged smoothly through the switch valve. It has the advantages of high oil discharge efficiency and convenience.

[0017] 2. The hollow magnetic blocks are used, which can effectively increase the adsorption area of ​​the magnetic blocks and better remove iron filings from the engine oil. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of a centrifugal water pump.

[0019] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0020] Figure 3 This is a structural schematic diagram of the support base.

[0021] In the diagram, 1. Box body; 1a. Oil collection trough; 1b. Circumferential surface one; 1c. Circumferential surface two; 1d. Conical surface; 2. Switch valve; 2a. Inlet end; 2b. Annular step; 3. O-ring; 4. Support base; 4a. Circular ring; 4b. Support block; 4c. Spoke; 4d. Oil passage; 5. Positioning rod; 6. Magnetic block. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] like Figure 1 As shown, in the oil draining structure of the centrifugal water pump bearing housing, the bearing housing includes a horizontally arranged cylindrical housing 1, and an oil collection groove 1a is provided at the lowest point of the inner wall of the housing 1. Specifically, the housing 1 is cylindrical, with both ends of the housing 1 having a circular surface 1b, and the middle inner wall of the housing 1 including a circular surface 1c. The diameter of the circular surface 1b is larger than that of the circular surface 1c, and both circular surfaces 1b are connected to the circular surface 1c by a conical surface 1d. At this time, the diameters of the two conical surfaces 1d are symmetrically arranged along the center of the housing 1, and the diameters of the two conical surfaces 1d gradually increase towards each other. The oil collection groove 1a is provided on the circular surface 1c, and preferably the oil collection groove 1a is an arc shape coaxial with the housing 1. With the above design, the oil can enter the oil collection groove 1a faster and more smoothly, improving the oil draining efficiency.

[0024] like Figure 2 and Figure 3 As shown, the oil draining structure of this centrifugal water pump bearing housing includes a switch valve 2. The switch valve 2 can be a ball valve, angle valve, gate valve, etc., and preferably a ball valve. The switch valve 2 includes a vertically arranged, tubular inlet end 2a. A threaded hole is vertically formed on the bottom wall of the oil collecting tank 1a, directly opposite the inlet end 2a, and the inlet end 2a is threaded into the threaded hole. Further, an annular groove is formed on the outer wall of the inlet end 2a, and the annular groove and the inlet end 2a are coaxially arranged. An O-ring 3 is provided inside the annular groove, and the outer circumferential surface of the O-ring 3 contacts and seals the inner wall of the threaded hole. This not only forms a stable seal between the inlet end 2a and the housing 1, but also facilitates the disassembly and assembly of the switch valve 2.

[0025] like Figure 2 and Figure 3 As shown, a support base 4 is fixed inside the upper end of the inlet 2a, and the support base 4 does not isolate the inner hole of the inlet 2a from the oil collection tank 1a. That is, after the switch valve 2 is installed on the housing 1, the inner hole of the inlet 2a and the oil collection tank 1a always remain in a connected state. The top of the support base 4 has a vertically arranged positioning rod 5, the upper end of which extends out of the inlet 2a and is located in the oil collection tank 1a. A columnar magnetic block 6 is coaxially fixed to the upper end of the positioning rod 5, and the outer diameter of the magnetic block 6 is smaller than the diameter of the threaded hole.

[0026] The process of changing the engine oil in housing 1 is as follows: First, open switch valve 2 to drain the engine oil in housing 1. After the engine oil has been mostly drained, unscrew switch valve 2 to allow magnetic block 6 to extend out of housing 1. Then, clean off the iron filings attached to magnetic block 6, and finally screw switch valve 2 back in.

[0027] With the cooperation of the support base 4 and the positioning rod 5, the magnetic block 6 is placed in the oil collection groove 1a and there is a certain distance between it and the upper port of the inlet end 2a of the switch valve 2. This way, even if a lot of iron filings are attached to the magnetic block 6, it will not hinder the oil in the housing 1 from entering the switch valve 2, ensuring that the oil can always be discharged smoothly through the switch valve 2. It has the advantages of high oil discharge efficiency and convenience.

[0028] In this embodiment, like Figure 3 As shown, the specific structure of the support base 4 is as follows: The support base 4 includes a circular ring 4a and a support block 4c coaxially disposed within the circular ring 4a. The support block 4c is connected to the inner wall of the circular ring 4a by a ring of spokes 4c. The ring of spokes 4c is evenly distributed along the circumference of the circular ring 4a, and an oil passage 4d is formed between adjacent spokes 4c. In the actual product, the circular ring 4a, the support block 4c, and the spokes 4c are a single integrated structure.

[0029] The annular body 4a is fixed to the inner wall of the inlet end 2a. Specifically, the inner wall of the inlet end 2a has an annular step 2b that matches the annular body 4a, and the annular step 2b and the inlet end 2a are coaxially arranged. The annular body 4a is inserted into the annular step 2b and pressed against the bottom wall of the annular step 2b. The support base 4 is positioned inside the inlet end 2a by a press-fit method, which has the advantages of convenient and easy assembly.

[0030] The positioning rod 5 is set on the support block 4c, and the specific installation method is as follows: the support block 4c has a vertical through threaded hole 2, and the lower end of the positioning rod 5 is threaded into the threaded hole 2, so as to facilitate the disassembly and assembly of the whole consisting of the positioning rod 5 and the magnetic block 6, and to facilitate the cleaning of the magnetic block 6.

[0031] like Figure 2 As shown, the magnetic block 6 is hollow with openings at both ends. The lower end of the magnetic block 6 is fitted and fixed to the outside of the positioning rod 5. Using a hollow magnetic block 6 effectively increases its adsorption area, thus better removing iron filings from the oil. Preferably, the upper outer wall of the positioning rod 5 has an annular positioning step, and the positioning step is coaxial with the positioning rod 5; the lower end of the magnetic block 6 is engaged with the positioning step and pressed against its bottom wall. In actual products, adhesive is also applied to the contact area between the magnetic block 6 and the positioning step to increase the positioning stability of the magnetic block 6.

[0032] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A centrifugal water pump bearing housing oil draining structure, the bearing housing including a horizontally arranged cylindrical housing (1), an oil collection groove (1a) is provided at the lowest point of the inner wall of the housing (1), the oil draining structure including a switch valve (2), the switch valve (2) including a vertically arranged tubular inlet end (2a), a threaded hole is vertically provided on the bottom wall of the oil collection groove (1a), and the inlet end (2a) is threadedly connected to the threaded hole, characterized in that, A support seat (4) is fixed inside the upper end of the inlet end (2a), and the support seat (4) does not isolate the inner hole of the inlet end (2a) and the oil collection groove (1a); the top of the support seat (4) has a vertically arranged positioning rod (5), the upper end of the positioning rod (5) extends out of the inlet end (2a) and is in the oil collection groove (1a); a columnar magnetic block (6) is coaxially fixed at the upper end of the positioning rod (5), and the outer diameter of the magnetic block (6) is smaller than the diameter of the threaded hole one.

2. The centrifugal water pump bearing housing oil draining structure according to claim 1, characterized in that, The aforementioned support base (4) includes a ring body (4a) and a support block (4b) coaxially disposed within the ring body (4a). The support block (4b) is connected to the inner wall of the ring body (4a) through a ring of spokes (4c), and an oil passage (4d) is formed between two adjacent spokes (4c). The ring body (4a) is fixed on the inner wall of the inlet end (2a), and the aforementioned positioning rod (5) is disposed on the support block (4b).

3. The centrifugal water pump bearing housing oil draining structure according to claim 2, characterized in that, An annular step (2b) matching the annular body (4a) is formed on the inner wall of the inlet end (2a). The annular body (4a) is inserted into the annular step (2b) and pressed against the bottom wall of the annular step (2b).

4. The centrifugal water pump bearing housing oil draining structure according to claim 2, characterized in that, The magnetic block (6) is hollow and has openings at both ends. The lower end of the magnetic block (6) is sleeved and fixed outside the positioning rod (5).

5. The centrifugal water pump bearing housing oil draining structure according to claim 4, characterized in that, The upper outer wall of the positioning rod (5) is provided with a ring-shaped positioning step, and the positioning step is coaxial with the positioning rod (5); the lower end of the magnetic block (6) is inserted into the positioning step and pressed on the bottom wall of the positioning step.

6. The centrifugal water pump bearing housing oil draining structure according to claim 2, characterized in that, The support block (4b) has a vertically penetrating threaded hole two, and the lower end of the positioning rod (5) is threaded into the threaded hole two.

7. The centrifugal water pump bearing housing oil draining structure according to claim 1, characterized in that, An annular groove is provided on the outer wall of the inlet end (2a), and an O-ring (3) is provided in the annular groove. The outer circumferential surface of the O-ring (3) is in contact with the inner wall of the threaded hole and seals.

8. The centrifugal water pump bearing housing oil draining structure according to claim 1, characterized in that, The box (1) is cylindrical. The inner walls at both ends of the box (1) are circular surfaces one (1b). The inner wall in the middle of the box (1) includes a circular surface two (1c). The diameter of the circular surface one (1b) is larger than that of the circular surface two (1c). Both circular surfaces one (1b) are connected to the circular surface two (1c) through a conical surface (1d). The oil collection groove (1a) is set on the circular surface two (1c).

9. The centrifugal water pump bearing housing oil draining structure according to claim 8, characterized in that, The oil collection trough (1a) is an arc shape coaxial with the box body (1).

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