JPH04107498U - water pump - Google Patents

Abstract

(57) [Summary] [Purpose] In water pumps used for engine cooling, etc., foreign matter such as rainwater or muddy water can enter through the steam vent that opens to the atmosphere from the drain room in the pump housing. The purpose is to prevent it from penetrating into mechanical seal sliding surfaces and bearing seals. [Configuration] The pump shaft 13 is located at the top of the pump housing 11.
position eccentric from the center of the pump housing 11
For example, a steam hole 19 and a drain hole 20 are formed in the lower part of the pump housing 11 on the center line of the pump shaft 13, and the drain hole 19 and the drain hole 20 are respectively opened to the atmosphere from the drain room 18. A water passage groove 21 was formed to communicate the hole 19 and the drain hole 20. Thereby, foreign matter such as muddy water that has entered the drain room 18 can be effectively discharged to the outside.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a water pump used for cooling an engine.

0002

[Conventional technology]

Conventionally, this type of water pump is disclosed in Japanese Utility Model Application Publication No. 59-64428, as an example. The ones listed are known.

0003 To give an overview of this water pump, as shown in Figure 5, it is driven by an engine. An impeller 2 press-fitted onto one end of the pump shaft 1 to be moved is inserted into the pump housing 3. A pump shaft disposed in the cooling water passage 3a and located on the back side of the impeller 2. A mechanical seal device 4 surrounds the cooling water and prevents the cooling water from leaking to the outside. The pump housing 3 has a steam hole that communicates with the atmosphere from the drain room 5. 6 and a drain hole 7 are drilled therein.

0004 Then, water vapor is released from the sliding surface between the mechanical seal device 4 and the seat 4a. Since it is released into the drain room 5, it is released from the steam hole 6 provided at the top of the drain room 5. The structure is designed to release it into the atmosphere.

[0005]

[Problem that the idea aims to solve]

However, in the conventional configuration described above, the steam hole 6 provided in the drain room 5 The drain hole 7 is designed to prevent cooling water, steam, etc. leaked from the mechanical seal device 4. These steam holes 6 and drain holes 7 are located in the upper part of the drain room 5. Since it is more open to the atmosphere, rainwater, muddy water, or dust splashed up when the vehicle is running is removed. Foreign matter such as dust may enter the drain room 5 through the steam hole 6 or drain hole 7. There is.

[0006] This foreign material travels through the inside of the bearing 8 and the pump shaft 1 to the mechanical seal. It may penetrate into the sliding surface of the device 4 and cause jamming, resulting in damage to the bearing and damage to the bearing. Deterioration of the bearing and sealing functions due to roughness of the sliding surface of the canical seal device 4, etc. problems such as a decrease in pump performance due to water leakage and a decrease in service life. was there.

[0007] This invention was devised to solve the above problems, and its purpose is to Even if a foreign object is inserted through the drain hole, the sliding surface of the mechanical seal or the bearing system will be damaged. - To provide a water pump which is prevented from penetrating into the hole section.

[0008]

[Means to solve the problem]

In order to achieve the above purpose, the water pump of the present invention has a base on the pump housing. The impeller is fixed to one end of the pump shaft which is pivotally connected via a ring, and this impeller and A mechanical seal device is provided between the bearings, and the bearings in the pump housing are A drain room surrounding the pump shaft is provided between the ring and the mechanical seal. In a water pump, the upper part of the pump housing is offset from the center of the pump shaft. It consists of a structure in which steam holes are formed at central locations.

[0009]

[Effect]

According to this configuration, the position of the steam hole that opens to the atmosphere from the top of the drain room is Since the pump is installed eccentrically from the center of the pump shaft, rainwater and mud will not enter the drain room from the steam vent. Even if foreign matter such as water enters, it will not get caught on the pump shaft and will be drained outside. Therefore, Dre Foreign matter that has entered the pump chamber may reach the bearings and sealing device from the pump shaft. Pump function can be improved without any problems.

0010

【Example】

(Example 1) A first embodiment of the present invention will be described below with reference to the drawings.

[0011] In FIG. 1, 11 is a pump housing, and this pump housing 11 A bearing 14, into which a pump shaft 13 is inserted, is pivotally mounted in the bearing hole 12 of the pump. An impeller 15 is pivotally attached to one end of the pump shaft 13, and the back surface of the impeller 15 and A mechanical seal 1 is provided between the seal hole 16 formed to have a smaller diameter than the bearing hole 12. 7 is placed. Then, the bearing 14 and the mechanical seal 17 A drain room 18 is formed in between, surrounding the rotating shaft 13.

0012 A position eccentric from the center of the pump shaft 13 at the lower part of the pump housing 11, and the lower part of the pump housing 11, for example, on the center line of the pump shaft 13. A steam hole 19 and a drain hole 20 each opening to the atmosphere from the drain room 18 are bored. ing.

[0013] A steam hole is provided along the inner wall surface of the pump housing 11 on the steam hole 19 side. A water passage groove 21 passing through the drain hole 20 and the drain hole 20 is formed. This water groove 21 As shown in FIG. has been done.

[0014] According to the water pump of the present invention configured as described above, water pumps can be pumped while the vehicle is running. Splashed up rainwater, muddy water, or foreign matter such as dust may enter the pump housing from the steam vent 19. Even if the water enters the drain room 18 of Since foreign matter is discharged through the pump hole 20, foreign matter does not adhere to the pump shaft 13. It may damage the bearing 14 or reduce the mechanical seal function. do not have.

[0015] (Example 2) A second embodiment of the present invention will be described below with reference to the drawings.

[0016] In FIG. 3, 11 is a pump housing, 12 is a bearing hole, 16 is a seal hole, 1 8 is a drain room, 19 is a steam hole, 20 is a drain hole, 21 is a water passage groove, and the above is similar to the configuration shown in FIG. The difference from the configuration in Figure 1 is that the pump housing On both sides of the water passage groove 21 that communicates the steam hole 19 and the drain hole 20 bored in the hole 11, This is because shielding walls 22a and 22b are provided.

[0017] That is, as shown in FIG. The pump housing 11 is formed into a moon shape and extends along the water passage groove 21 formed on the inner wall surface of the pump housing 11. It is attached to both sides. The shielding wall 22a on one side is a mechanical The shielding wall 22b on the other side is fixed to the retainer 17a of the seal 17, and the shielding wall 22b on the other side is attached to the bearing 14. It is fixed to the outer ring.

[0018] As described above, in the second embodiment of the present invention, the pump housing 11 has a A half-moon shaped thin plate is formed on both sides of the water passage groove 21 that communicates the steam hole 19 and the drain hole 20. By attaching the shaped shielding walls 22a and 22b, the structure of the first embodiment is increased. If foreign matter such as rainwater or muddy water enters the drain room 18 of the pump housing 11, Also, foreign matter does not adhere to the pump shaft 13, thereby damaging the bearing 14. Also, the sealing function of the mechanical seal 17 is not deteriorated.

[0019]

[Effect of the idea]

As explained above, according to the configuration of the present invention, the drain hole inside the pump housing The steam hole, which opens to the atmosphere from the top of the pump, is located eccentrically from the center of the pump shaft. Therefore, even if foreign matter such as rainwater or muddy water splashed up while the vehicle is running enters through the steam vent, It is discharged outside without being caught on the pump shaft.

[0020] Therefore, foreign matter that has entered the drain room can be removed from the pump shaft by bearings and seals. It may reach the equipment and damage the bearing or reduce the sealing function of the mechanical seal. Pump function can be improved without causing any damage.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a water pump in a first embodiment.

FIG. 2 is a sectional view taken along line 2-2 in FIG. 1;

FIG. 3 is a sectional view of the water pump in the embodiment of FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is a sectional view of a water pump with a conventional structure.

[Explanation of symbols]

11 Pump housing 13 Pump shaft 14 Bearing 17 Mechanical room 18 Drain room 19 Steam vent 20 Drain hole 21 Water channel 22a Shielding wall 22b Shielding wall

Claims (1)

[Scope of utility model registration request] Claim 1: An impeller is fixed to one end of a pump shaft pivotally connected to a pump housing via a bearing, a mechanical seal device is provided between the impeller and the bearing, and a mechanical seal device is provided between the impeller and the bearing, and A water pump having a drain room surrounding the pump between it and a mechanical seal, characterized in that a steam hole is formed in an upper part of the pump housing at a position eccentric from the center of the pump shaft. Tapon.