JPH0532793U - Horizontal axis hydraulic machine with water-lubricated submersible bearings - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a horizontal axis hydraulic machine equipped with a water-lubricated underwater bearing that does not require a forced water injection device. A horizontal axis hydraulic machine having an inner shell (5) in a casing (2) and a shaft (3) tip end supported by a water-lubricated underwater bearing (6) provided in the inner shell. A partition wall (7) is erected from the lower half of the inner shell, and the partition wall and a part of the inner shell form a water storage chamber (9), while the shaft rotates to store the water in the water storage chamber. A structure in which a ring (10) for supplying water (W) to the underwater bearing is suspended.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a horizontal axis hydraulic machine equipped with a water-lubricated submersible bearing.

[0002]

[Problems to be solved by conventional techniques and devices]

 In recent years, in horizontal-axis pumps equipped with water-lubricated submersible bearings and horizontal-axis hydraulic machines such as water turbines, it is necessary to periodically or irregularly run the pump for several minutes or more to check whether the pump will operate normally. Test runs are often being carried out to confirm. By the way, in the "color operation", since water is not supplied to the water-lubricated submersible bearing, the submersible bearing is burned and damaged by the dry operation. Therefore, in the past, a complicated forced water injection device was attached to prevent the above-mentioned seizure due to "color operation", which is only occasionally operated, and there was the problem that the horizontal axis hydraulic machine was only expensive. . The present invention is a horizontal axis hydraulic machine equipped with a water-lubricated submersible bearing that enables "color operation" without installing a forced water injection device by simply providing a simple mechanism for the inner body and shaft. The purpose is to provide.

[0003]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a horizontal axis hydraulic machine having an inner shell in a casing, wherein a shaft tip portion is supported by a water-lubricated submersible bearing provided in the inner shell. A partition wall is erected from the lower half of the barrel, and the partition wall and a part of the inner barrel form a water storage chamber, while the shaft rotates to supply the water stored in the water storage chamber to the underwater bearing. The ring is suspended.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a horizontal axis pump which is a kind of horizontal axis hydraulic machine, 2 denotes a pump casing, 3 denotes a shaft, 4 denotes an impeller, 5 denotes a substantially bowl-shaped inner barrel provided in the pump casing 2, and the shaft 3 Is supported by a water-lubricated underwater bearing 6 made of ceramic or rubber provided in the inner case 5. In addition, 11 is a water tank, 12 is a water absorption pipe, and 13 is a discharge pipe.

Reference numeral 7 denotes a partition wall provided at the end of the inner body 5 on the side of the impeller 4 so as to stand upright from the lower half of the inner body 5. A semicircular cutout 8 having a diameter slightly larger than the diameter is provided, and a water storage chamber 9 is formed by the partition wall 7 and a part of the inner case 5.

Reference numeral 10 denotes a water supply ring, which is suspended on a shaft 3 positioned on both sides of the submersible bearing 6 and above the water storage chamber 9, the lower end portion of which is as described below. It is immersed in the stored water W. In the embodiment, the rings 9 are provided on both sides of the underwater bearing 6, but only one ring may be provided, or depending on the configuration of the underwater bearing 6, it may be provided in the middle portion of the underwater bearing 6.

Since the horizontal shaft pump 1 is configured as described above, if normal pumping operation is performed before “color operation”, a part of the pumped water is stored in the water storage chamber 9 after the operation is stopped. Exists as stored water W.

[0008] Therefore, when the "color operation" is performed in this state, the rotation of the shaft 3 causes the ring 10 to "slip around", and the rotation of the ring 10 causes a part of the stored water W to move into the underwater bearing. The water is lubricated to the submerged bearing 6 by scraping and supplying it to the sliding surface (bearing surface) of 6.

[0009] In addition, when the "color operation" is performed after a long time has passed from the normal pumping operation, the stored water W has evaporated and disappeared, and an accident may occur. Alternatively, a simple liquid level detector may be provided in the water storage chamber 9 to detect the amount of stored water and supply water into the water storage chamber 8.

[0010]

[Effect of the device]

 As is clear from the above description, in the present invention, a water storage chamber is provided at the bottom of the water-lubricated submersible bearing, and a part of the water during normal operation is stored in the water storage chamber. Since the stored water is supplied to the bearing surface of the submersible bearing by the rotation of the ring, an expensive forced water injection device is unnecessary, and an inexpensive horizontal axis hydraulic machine can be obtained.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a horizontal axis hydraulic machine according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

1 ... Horizontal axis pump, 2 ... Casing, 3 ... Shaft, 4 ...
Impeller, 5 ... Inner body, 6 ... Water-lubricated underwater bearing, 7 ... Partition wall, 9 ... Water storage chamber, 10 ... Ring, W ... Reservoir water.

Claims (1)

[Scope of utility model registration request] 1. A horizontal axis hydraulic machine having an inner shell in a casing, and a shaft tip portion thereof being supported by a water-lubricated submersible bearing provided in the inner shell, wherein a partition wall is provided from a lower half portion of the inner shell. And the partition wall and a part of the inner case form a water storage chamber, while the shaft is provided with a ring for suspending the water stored in the water storage chamber to the submersible bearing by rotation of the shaft. Horizontal axis hydraulic machine equipped with a water-lubricated submersible bearing.