JP4670373B2 - Self-priming pump - Google Patents

Description

  The present invention provides a casing having an impeller disposed therein, and a casing that is covered with an opening of the casing so as to be watertight at a contact portion between a peripheral edge portion and a separation wall portion via a sheet-like elastic body. A self-priming pump having a cover.

  In recent years, a self-priming pump as shown in (Patent Document 1) is used for circulating bath water.

  FIG. 3 is a partial cross-sectional side view of a conventional self-priming pump, and FIG. 4 is a front view of main parts of a casing cover of the conventional self-priming pump.

  In the figure, 101 is a conventional self-priming pump, 2 is a drive motor, 3a and 3b are motor covers which are outer parts of the drive motor 2, 4 is a stator, 5 is a rotor that rotates around a motor-side rotating shaft 5a, Reference numerals 6a and 6b denote a pair of motor-side bearing portions which are disposed inside the motor covers 3a and 3b and rotatably support the motor-side rotating shaft 5a. Reference numeral 7 denotes a cup-shaped housing portion fixed to the motor-side rotating shaft 5a. , 8 is an annular drive-side magnet fixed to the inside of the housing part 7, 9 is a bracket part that is fixed to the motor cover 3a by screws and covers the periphery of the housing part 7, and 11 is supported and fixed to the bracket part 9. A casing, 12 is an impeller disposed inside the casing 11 and rotates around a pump-side rotating shaft 12a, 13 is a pump-side bearing that supports the pump-side rotating shaft 12a, and 14 is a blade An annular driven magnet fixed to the back of the vehicle 12 and opposed to the inner periphery of the drive magnet 8 and magnetically coupled; 15 is a partition plate covering the front opening of the casing 11; Reference numeral 16 denotes a sheet-like elastic body attached to the front side of the partition plate 15, and 17 denotes a casing cover that covers the front opening of the casing 11 so as to be watertight at the periphery via the sheet-like elastic body 16. is there. The casing cover 17 forms a priming tank, and the peripheral edge of the front opening of the casing 11 and the peripheral edge of the opening of the casing cover 17 are joined to each other without water leakage by a fixing screw 17a across the sheet-like elastic body 16. ing. Reference numeral 18 a denotes a discharge port formed in the upper part of the casing cover 17 and communicated with a later-described discharge flow path, 18 b denotes a suction port communicated with a later-described suction flow path formed in the upper part of the casing cover 17, and 19 denotes the inside of the casing cover 17. The separation wall portions 20a and 20b erected on the wall are a discharge flow channel and a suction flow channel partitioned by the separation wall portion 19, and the suction flow channel 20b is a suction formed in the partition plate 15 and the sheet-like elastic body 16. It communicates with the impeller chamber 22 in which the impeller 12 is disposed via the side communication portion 21.

  Fig.5 (a) is a front view of a sheet-like elastic body, FIG.5 (b) is principal part arrow sectional drawing of the BB line of Fig.5 (a).

  In FIG. 5, reference numerals 23 a to 23 c denote discharge-side communication portions formed on the sheet-like elastic body 16, and 24 denotes a protrusion protruding on the surface of the sheet-like elastic body 16, and the peripheral edge portion of the casing cover 17 and the end portion of the separation wall portion 19. It is a convex part which contacts in a pressure contact state.

  With respect to the conventional self-priming pump 101 configured as described above, the operation of the sheet-like elastic body 16 will be described below with reference to FIG.

  FIG. 6 is a cross-sectional view of a principal part showing a state of the sheet-like elastic body when the self-priming pump is operated.

When the drive motor 2 is driven and the impeller 12 rotates, the water in the suction passage 20b is sucked into the casing 11 through the suction-side communication portion 21, so that the suction passage 20b has a negative pressure. Since the water in the casing 11 is discharged to the discharge flow path 20a via the discharge side communication portions 23a to 23c, the discharge flow path 20a has a positive pressure. Here, when the pushing pressure to the self-priming pump 101 is high, the partition plate 15 bends to create a gap with the sheet-like elastic body 16, and further, as shown in FIG. Since the pressure increases, the sheet-like elastic body 16 is pulled toward the suction flow path 20b or the separation wall portion 19 is bent, so that the sheet-like elastic body 16 and the end portion of the separation wall portion 19 are interposed. There was a case where a gap was generated and the sealing function was not performed.
JP-A-5-44682

However, the above conventional techniques have the following problems.
(1) When the conventional self-priming pump 101 is used in a state where the indentation pressure is high, the sheet-like elastic body 16 is deformed with time, and does not perform the original sealing function, and the pump performance is reduced. Had problems. Further, there is a problem that water flows from a gap generated by the deformation, and the sheet-like elastic body 16 is shaken to generate an abnormal sound.
(2) In recent years, the demand for self-priming electric pumps has become versatile and may be used, for example, as a circulation pump for electric water heaters. In this case, the pressure generated by the pump itself is used at a higher water temperature than for bath circulation. In addition, a high indentation pressure is applied to the pump and it is often operated normally under high pressure.Therefore, as a market demand, a self-priming pump that can operate normally with a high water temperature and a high indentation pressure is strong. It has been demanded.

  The present invention solves the above-mentioned conventional problems, and prevents the displacement and deformation of the sheet-like elastic body due to the negative pressure of the suction flow path, improves the sealing performance and prevents the pump performance from being lowered. An object is to provide a pump.

In order to solve the above problems, self-priming pump of the present invention, a drive motor for driving the blade roots cars, a casing impeller disposed therein having an open mouth, a discharge opening, a suction and mouth, have a, a separation wall portion that partitions the suction passage communicating with the discharge passage and the suction port communicated with the discharge port therein, a casing cover which is Kutsugae設the opening, the casing and the casing cover periphery and a sheet-like elastic body in a watertight manner the contact portion between the separation wall, Bei example a self-priming and the discharge flow path to a positive pressure with a negative pressure of intake passage side by the rotation of the impeller In the self-priming pump that performs the operation , the sheet-like elastic body has a configuration including a misalignment prevention wall portion erected along at least the surface of the separation wall portion on the discharge flow path side.

  Thus, it is possible to provide a self-priming pump that can prevent the displacement and deformation of the sheet-like elastic body due to the negative pressure of the suction flow path, improve the sealing performance, and prevent the pump performance from deteriorating.

  As described above, according to the self-priming pump of the present invention, the following advantageous effects can be obtained.

  According to the first aspect of the present invention, since the displacement preventing wall portion is formed on the sheet elastic body, the movement of the sheet elastic body is prevented in a state where the indentation pressure is high, and deformation and displacement are prevented. It is possible to provide a self-priming pump excellent in pump performance and quietness that can maintain high sealing performance and can prevent occurrence of abnormal noise.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, the play portion is formed between the misalignment prevention wall portion and the separation wall portion. It is possible to provide a self-priming pump excellent in durability that can prevent an excessive load from being applied to the elastic body and suppress deformation and deterioration over time.

  The purpose of the present invention is to provide a self-priming pump capable of preventing the displacement and deformation of the sheet-like elastic body due to the negative pressure of the suction flow path, improving the sealing performance and preventing the pump performance from being lowered, This is realized by providing the sheet-like elastic body with a misalignment prevention wall portion erected along at least the surface on the discharge flow path side of the separation wall portion.

The invention of claim 1 has been made to solve the above problems, a driving motor for driving the blade roots cars, a casing impeller disposed therein having an open mouth, and the discharge opening, the suction opening If, have a, a separation wall portion that partitions the interior into a suction passage communicating with the discharge passage and the suction port communicated with the discharge port, and a casing cover which is Kutsugae設the opening, the casing and the casing cover e Bei a sheet elastic body for the contact portion between the peripheral portion and the separation wall in watertight, and then the discharge flow path with a negative pressure of intake passage side by the rotation of the impeller to the positive pressure self吸動operation In this self-priming pump, the sheet-like elastic body has a configuration including a misalignment prevention wall portion erected along at least the surface of the separation wall portion on the discharge flow path side.

This configuration has the following effects.
(1) Since the displacement prevention wall portion is formed on the casing cover side of the sheet elastic body along at least the surface on the discharge flow path side of the separation wall portion, the sheet elastic body is deformed in a state where the pressing pressure is high. Even if it is about to be displaced, the displacement prevention wall part abuts against the separation wall part to prevent movement of the sheet elastic body, prevent deformation and displacement, maintain high sealing performance, Can also be prevented.

  Here, the misalignment prevention wall portion is formed linearly or curvedly along the separation wall portion, and may be formed over the entire separation wall portion, or may be formed only at a predetermined portion. Moreover, you may form a continuous protrusion along a separation wall part as a position shift prevention wall part. The misregistration prevention wall portion may be formed on both sides of the separation wall portion on the discharge flow channel side and the suction flow channel side, thereby further improving the sealing performance by sandwiching the separation wall portion between the misalignment prevention wall portions. be able to.

  The invention of claim 2 made to solve the above-mentioned problems is the self-priming pump according to the invention of claim 1, comprising a play portion between the misalignment prevention wall portion and the separation wall portion. It has a configuration in which a misalignment prevention wall is formed.

With this configuration, in addition to the operation of the first aspect of the invention, the following operation is provided.
(1) Since a play portion is formed between the misalignment prevention wall portion and the separation wall portion, when the sheet-like elastic body is deformed or misplaced in a state where the pushing pressure is high, the play portion is Since the sheet-like elastic body can move by the width of the portion, it is possible to prevent an excessive load from being applied and to suppress deformation and deterioration over time.

(Embodiment 1)
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.

  The self-priming pump according to the first embodiment has the same configuration as that of the conventional self-priming pump 101 described in the background art except that a position shift prevention wall is formed on the sheet-like elastic body. Therefore, description of the whole structure is abbreviate | omitted and it explains in full detail about a sheet-like elastic body.

  FIG. 1A is a front view of a sheet-like elastic body of the self-priming pump according to Embodiment 1, and FIG. 1B is a cross-sectional view taken along the line AA in FIG. is there.

  In the figure, 16 is a sheet-like elastic body, 17 is a casing cover, 19 is a separation wall portion, 23a to 23c are discharge side communication portions, 24 is a convex portion, and 25 is a surface of the sheet elastic body 16 on the discharge flow path 20a side. A misalignment prevention wall portion 26 erected along with it is a play portion formed between the misalignment prevention wall portion 25 and the separation wall portion 19.

  Here, a convex portion 24 is formed on the sheet-like elastic body 16 over the contact portion between the peripheral edge portion of the casing cover 17 and the separation wall portion 19, and the contact portion between the sheet-like elastic body 16 and the casing cover 17. Is more likely to be in a pressure contact state. Further, the misalignment prevention wall portion 25 is continuously formed so as to be substantially orthogonal from the side end portion of the convex portion 24.

  Regarding the self-priming pump according to the first embodiment configured as described above, the operation of the sheet-like elastic body 16 will be described below with reference to FIG.

  FIG. 2 is a cross-sectional view of the main part showing the state of the sheet-like elastic body when the self-priming pump is operated.

  When the self-priming pump is activated, the suction flow path 20b is negatively pressured, while the discharge flow path 20a is positive pressure. Here, when the pushing pressure to the self-priming pump 101 is high, as shown in FIG. 2, the negative pressure of the suction flow path 20b increases, so the sheet-like elastic body 16 is pulled toward the suction flow path 20b. The misalignment prevention wall portion 25 comes into contact with the separation wall portion 19 and is caught and is prevented from being pulled further.

Since the self-priming pump according to the first embodiment is configured as described above, it has the following effects.
(1) Since the displacement prevention wall portion 25 is formed along the surface of the separation wall portion 19 of the sheet elastic body 16 on the discharge flow channel 20a side, the negative pressure of the suction flow channel 20b is increased and the sheet-like elasticity is increased. Even if the convex portion 24 of the body 16 is pulled toward the suction flow path side 20b, the misalignment prevention wall portion 25 is caught by the separation wall portion 19, so that the sheet-like elastic body 16 is prevented from being deformed or displaced over time, High sealing performance.
(2) Since the misregistration prevention wall portion 25 is formed continuously from the side end of the convex portion 24 and there is no gap between the convex portion 24 and the misregistration prevention wall portion 25, the convex portion 24 is on the suction flow path side. When pulled to the 20b side, the misalignment prevention wall portion 25 is in close contact with the separation wall portion 19 in a watertight manner and can be reliably sealed.
(3) Further, since no gap is generated between the sheet-like elastic body 16 and the end of the separation wall portion 19, it is possible to prevent the generation of abnormal noise due to the tremor of the elastic body.
(4) Since the play portion 26 is formed between the misalignment prevention wall portion 25 and the separation wall portion 19, it is possible to prevent an excessive load from being applied to the sheet-like elastic body 16, and deformation and deterioration over time. Can be suppressed.

  The present invention is a self-priming type comprising: a casing in which an impeller is disposed; and a casing cover that is covered with an opening of the casing so as to be watertight at a peripheral portion via a sheet-like elastic body. With regard to the pump, in particular, according to the present invention, it is possible to prevent the movement of the seat elastic body in a state where the indentation pressure is high, to prevent deformation and displacement, to maintain high sealing performance, and to prevent occurrence of abnormal noise. It is possible to provide a self-priming pump that is excellent in pump performance and quietness, can prevent an excessive load on the sheet-like elastic body, and is excellent in durability.

(A) Front view of sheet-like elastic body of self-priming pump in embodiment 1, (b) A cross-sectional view taken along the line AA in FIG. Main part sectional drawing which shows the state of a sheet-like elastic body at the time of a self-priming pump operation Partial sectional side view of a conventional self-priming pump Front view of the main part of the casing cover of a conventional self-priming pump (A) Front view of sheet-like elastic body, (b) Cross-sectional view taken along line BB in FIG. 5 (a). Main part sectional drawing which shows the state of a sheet-like elastic body at the time of a self-priming pump operation

Explanation of symbols

2 Drive motor 3a, 3b Motor cover 4 Stator 5 Rotor 5a Motor side rotating shaft 6a, 6b Motor side bearing part 7 Housing part 8 Drive side magnet 9 Bracket part 11 Casing 12 Impeller 12a Pump side rotary shaft 13 Pump side bearing part 14 Drive side magnet 15 Partition plate 16 Sheet-like elastic body 17 Casing cover 17a Fixing screw 18a Discharge port 18b Suction port 19 Separation wall portion 20a Discharge flow channel 20b Suction flow channel 21 Suction side communication portion 22 Impeller chamber 23a-23c Discharge side communication Section 24 Convex section 25 Position shift prevention wall section 26 Play section 101 Self-priming pump

Claims (2)

A drive motor for driving the wing root car,
A casing in which the impeller is disposed inside has an open mouth,
And discharge opening, possess a suction port, and the separation wall portion that partitions the suction passage that communicates with the discharge passage communicating with the discharge port inside the suction port, and is Kutsugae設in the opening A casing cover;
A sheet-like elastic body that makes the contact portion between the casing and the peripheral portion of the casing cover and the separation wall portion watertight;
Bei to give a,
A self-priming pump that performs a self-priming operation with negative pressure on the suction flow path side and positive pressure on the discharge flow path by rotation of the impeller ,
The self-priming pump, wherein the sheet-like elastic body includes a misalignment prevention wall portion erected along at least the surface on the discharge flow path side of the separation wall portion.   The self-priming pump according to claim 1, wherein a play portion is provided between the misalignment prevention wall portion and the separation wall portion, and the misalignment prevention wall portion is formed.

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