JPH0680897U - Water pump - Google Patents

Abstract

(57) [Summary] [Object] To prevent heat from staying around the sliding surface of the mechanical seal 6 and prevent seizure due to heating of the mechanical seal 6. [Structure] A rotating shaft 1 supported by a main body 3 via a bearing 2.
An impeller 4 opposed to the spiral chamber 8 is fixed to the tip end of each of the two, and a fixed side portion 6a fitted to the main body 3 side and a rotation side fitted to the rotary shaft 1 side are provided between the bearing 2 and the impeller 4. In a water pump having a mechanical seal 6 that makes sliding contact with the portion 6b on a sliding contact surface, blades 11 and 11a are provided on the outer peripheral portion of the case 10 of the rotating side portion 6b of the mechanical seal 6.
Is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water pump used to circulate engine cooling of an automobile or the like.

[0002]

[Prior art]

 The conventional water pump shown in FIG. 1 has a rotary shaft 1 supported by a main body 3 via a bearing 2. An impeller 4 is provided at the tip of the rotary shaft 1, and a base end is provided. Pulley hubs 5 are fixed to the respective parts. Then, between the bearing 2 and the impeller 4, a mechanical seal 6 consisting of a fixed member 6a fitted to the main body 3 side and a rotating member 6b fitted to the rotating shaft 1 is provided on both members 6a and 6b. The sliding member is urged by a spring and abutted on it. Reference numeral 7 denotes a lid that constitutes the spiral chamber 8 facing the impeller 4, and is fixed to the main body 3 with a bolt 9. Although not shown, the lid 7 is provided with a water inlet and a water outlet.

[0003]

[Problems to be solved by the device]

 In the conventional water pump described above, a violent swirl of water is generated in the swirl chamber 8 constituted by the lid 7 as the impeller 4 rotates, and the water is sucked in, and the water is discharged to swirl the chamber 8. Although new water constantly flows into the water, the back side of the impeller 4 becomes a dead space and water circulation is hardly performed.

Therefore, the water in this portion is heated by the heat radiation from the sliding surface of the mechanical seal 6, which impedes cooling of the mechanical seal 6, and seizure may occur on the mechanical seal 6 due to long-term operation. there were.

The present invention has been made in view of the above points, and also causes a flow in water around the rotating side member of the mechanical seal so that heat does not stay in this portion. It is intended to provide a water pump capable of preventing seizure due to heating of a mechanical seal.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a water pump according to the present invention has an impeller 4 facing a spiral chamber 8 fixed to a tip end of a rotary shaft 1 supported by a main body 3 via a bearing 2 and the bearing 2 and the impeller. 4, a mechanical seal 6 for interposing a fixed side portion 6a fitted to the main body 3 side and a rotary side portion 6b fitted to the rotary shaft 1 side in sliding contact with each other is interposed. In the water pump, blades 11 and 11a are provided on the outer peripheral portion of the rotating side portion 6b case 10 of the mechanical seal 6.

[0007]

[Work]

 When the rotary side portion 6b of the mechanical seal 6 rotates integrally with the rotary shaft 1, the blades 11 and 11a provided on the outer periphery of the mechanical seal 6 circulate the water around this portion, and this portion is constantly cooled. To be done.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to FIG. In this embodiment, the same components as those of the conventional example shown in FIG. 1 are designated by the same reference numerals and their description is omitted. The blade 11 is provided on the outer peripheral portion of the case 10 on the rotating side portion 6b of the mechanical seal 6. As shown in FIGS. 3 (a) and 3 (b), the blades 11 may be provided by integrally bending the blades 11 on a part of the case 10, or as shown in FIGS. 4 (a) and 4 (b). The ring member 12 provided with the blades 11a on the outer periphery is fitted to the outer peripheral surface of the case 10.

The blade 11 provided integrally with the case 10 has various shapes as shown in FIGS. 5 (a), 5 (b), 6 (a) and 6 (b). Then, when the rotary shaft 1 rotates and the rotary side portion 6b of the mechanical seal 6 rotates, the blades 11 and 11a rotate integrally with the rotary side portion 6b, and the blades 11 and 11a face the back side portion of the impeller 4. Water circulates with the water in the swirl chamber 8. Therefore, new water constantly flows into this portion, and the sliding surface portion of the mechanical seal 6 is cooled by this water. Further, particularly in the embodiment shown in FIGS. 3 and 5, since the blade 11 is located outside the sliding surface of the mechanical seal 6, dust floating near the sliding surface is moved to the outside by the rotation of the blade 11. It is released and prevented from entering the sliding surface.

[0010]

[Effect of device]

 According to the present invention, the water around the sliding surface of the mechanical seal 6 is constantly circulated with the water in the swirl chamber 8 so that this part is not cooled and heat does not stay in this part. It is possible to prevent seizure due to heating.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a conventional water pump.

FIG. 2 is a sectional view showing a water pump according to the present invention.

FIG. 3A is a cross-sectional view showing a main part of a structure in which a blade is integrally provided in a case of a rotating side portion of a mechanical seal;
(B) is the A arrow view.

FIG. 4A is a cross-sectional view showing a main part of a configuration in which a ring member provided with blades is fitted in a case of a rotating side portion of a mechanical seal, and FIG. 4B is a perspective view showing a main part of the ring member. is there.

FIG. 5A is a cross-sectional view showing another example in which the blade is integrally provided in the case of the rotating side portion of the mechanical seal,
(B) is the B arrow view.

FIG. 6A is a cross-sectional view showing another example in which the blade is integrally provided in the case of the rotating side portion of the mechanical seal,
(B) is the C arrow line view.

[Explanation of symbols]

1 ... Rotary shaft, 2 ... Bearing, 3 ... Main body, 4 ... Impeller, 5 ...
Pulley hub, 6 ... Mechanical seal, 6a ... Fixed side part, 6b ... Rotation side part, 7 ... Lid, 8 ... Swirl chamber, 9 ... Bolt, 10 ... Case, 11, 11a ... Blade.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location F04D 29/12 B 8610-3H

Claims (1)

[Scope of utility model registration request] 1. An impeller 4 facing a spiral chamber 8 is fixed to the tip of a rotary shaft 1 supported by a main body 3 via a bearing 2 and fitted between the bearing 2 and the impeller 4 on the main body 3 side. In a water pump having a mechanical seal 6 in which a fixed side portion 6a to be mounted and a rotary side portion 6b to be fitted on the rotary shaft 1 side are brought into sliding contact with each other at sliding contact surfaces, the rotating side of the mechanical seal 6 is provided. The blades 1 and 1 are provided on the outer peripheral portion of the case 6b.
A water pump characterized by having 1a.