JPS6255000B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a grease supply device for a water pump such as a water supply pump or a crushing pump for pumping grease to a bearing part. .

(b) Prior Art Conventionally, in order to supply grease to the greasing parts such as the bearings of a pump, in addition to using a manual grease pump, there were also methods that used a heavy object to pump the grease by gravity, and methods that used a spring. Automatic greasing methods have been used, such as ones that use force to pump grease.

(c) Problems to be Solved by the Invention In these conventional techniques, none of the automatic means can adjust the amount of greasing in response to changes in the pressure of the greasing part, and However, there are drawbacks such as pressure being applied for greasing, and manual means have practical problems such as cumbersome work.

(d) Means for Solving the Problem The present invention provides a hydraulic piston and a hydraulic piston that are slidably fitted inside a hydraulic cylinder and a hydraulic cylinder arranged on a coaxial center line, respectively, by means of a piston rod. In this hydraulic cylinder, a hydraulic chamber formed on the opposite side of the piston rod to the hydraulic piston is provided in communication with the high pressure part of the pump, and in the oil cylinder, a piston rod and a piston rod are connected to the oil piston. The oil and fat chamber formed on the opposite side is provided in communication with the bearing part of the pump.

(e) Function According to the present invention, when the pump rotates, water in the high pressure section enters the hydraulic chamber through the water pipe and presses and moves the hydraulic piston. As the hydraulic piston moves, the greasing piston moves via the piston rod to pressurize the oil chamber, and the grease in the oil chamber is pumped and supplied to the bearing portion through the oil passage.

(f) Embodiment Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, numeral 1 indicates a crushing pump for crushing solid matter in liquid, and is constructed as follows. That is, the crushing blade 9 is fixed to the rotating shaft 11 and rotates in the passage 7 that communicates the suction port 3 and the discharge port 5. Reference numeral 13 corresponds to the crushing blades 9 and is used to crush solid materials; 15 is a fixing ring provided close to the outer periphery of the crushing blades 9; and 17 corresponds to the crushing blades 9 to cut large solid materials. Cutting blade for, 1
Reference numeral 9 denotes a rotary vane for delivering the crushed solid material to the discharge port 5 together with the liquid. A flange 21 is fixed to the other end of the shaft 11 and is connected to a power source (not shown) such as a motor. Reference numeral 25 denotes a bearing section provided in the main body case 27, which rotatably supports the shaft 11. 2
Reference numeral 9 denotes an oil passage, which communicates with a groove 31 provided in the axial direction on the inner diameter surface of the bearing portion 25. 33 is the bearing part 25
35 is a seal that fits into the main body case 27 at the other end, and 37 is a seal holder. Reference numeral 39 denotes a back plate that supports the back side of the rotary blade 19, and the inner diameter portion is connected to the boss portion 4 of the rotary blade 19.
1 is engaged. 43 is a water pressure path that communicates with the high pressure part (not shown) of the pump via the water pipe 4, which passes through a chamber 45 provided in the main body case 27 and a communication path 47.
It communicates with a shaft water seal 49 formed by a gap between the rotary vane 19 and the bearing 25 on the outer periphery of the shaft 11 . Reference numeral 51 denotes a drainage channel that communicates with the shaft water seal 49, and the other end communicates with an opening 53 that opens into the passage 7.

Reference numeral 55 denotes a greasing device that communicates with the oil passage 29 via a greasing pipe 57, and is configured as follows. That is, 59 is an operating part operated by the pressure of high-pressure water, 61 is a hydraulic cylinder closed with a cylinder cover 63, 65 is a hydraulic piston that is slidably fitted inside the hydraulic cylinder 61, and 67 is a hydraulic cylinder. a seal that fits on the outer diameter of the piston 65;
Reference numerals 9 and 71 indicate communication pipes that communicate with water pressure chambers 73 and 75 above (inward) and below (outside) the piston 65, respectively, and branch from the water pipe 44 via the water pressure path 43 to connect to the high pressure section of the pump (not shown). (1), and is provided so that it can be switched alternately by a switching valve (not shown) provided in the middle. Reference numeral 77 denotes a pressure-feeding unit for pressure-feeding grease to greasing parts such as the bearing 25 in conjunction with the operating unit 59; 79 is a cylinder cover 63;
The oil cylinder 81 is connected to the hydraulic cylinder 61 and the coaxial core line through the oil cylinder 79.
The hydraulic piston 65 is integrally fixed to the hydraulic piston 65 via a piston rod 83 passing through the cylinder cover 63. 85 is a seal provided on the inner diameter portion of the cylinder cover 63. The oil piston 81 is attached to a nut 93 through a rubber gasket 87 via washers 89 and 91.
It is held and fixed by. A grease tank 95 communicates with the oil chamber 97 above (outside) the oil piston 81, and is screwed into a lid 99 that closes the upper end of the oil cylinder 79. A cover 101 is screwed onto the grease tank 95. Oil room 97
communicates with the oil passage 29 via a greasing pipe 57.

In the above embodiment, when the rotating shaft 11 rotates, the rotating blades 19 rotate, and the liquid flows through the passage 7 from the suction port 3 to the discharge port 5. Solids mixed into the liquid are cut between the crushing blades 9 and the cutting blades 17,
Furthermore, it is crushed between the crushing blades 9 and the crushing grid 13. The high-pressure water in the high-pressure part of the pump is supplied through a water pipe 44,
It passes through the water pressure passage 43, the chamber 45, and the communication passage 47, passes through the shaft water seal part 49, passes through the drainage passage 51, and enters the passage 7 from the opening 53. When passing through the shaft water seal 49, the dirty water that tries to enter the shaft water seal 49 from the passage 7 is removed to prevent the waste water from entering sliding parts such as the bearing 25. Next, I will explain the operation of greasing.
First, fill the grease tank 95 with grease,
With the cover 101 open, a switching valve (not shown) is switched to send high-pressure water from the communication pipe 69 to the water pressure chamber 73, and the hydraulic piston 65 descends, and at the same time, the oil piston 81 descends to fill the grease tank. The grease in 95 enters the oil chamber 97.
At this point, the grease tank 95 is closed with a cover 101. Next, when high pressure water is switched to the communication pipe 71, the hydraulic piston 65 rises, and at the same time the oil piston 8
1 rises and the grease in the oil chamber 97 flows into the grease supply pipe 5.
7. The oil is sent from the oil passage 29 into the groove 31 and the bearing 2
5. Grease. That is, when the crushing pump 1 is driven, the hydraulic piston 65 is actuated by the water pressure generated at the same time, and the oil piston 81 moves into the oil chamber 97.
As the grease in the bearing 25 is depleted, the oil piston 81 moves upward to supply grease. Further, when the rotation of the crushing pump 1 is stopped, the pressurization of the oil chamber 97 is stopped, and the oil supply is stopped.

In addition, by appropriately selecting the outer diameter dimensions of the hydraulic piston 65 and the oil piston 81, the greasing pressure can be set appropriately. It is also possible to increase the

(g) Effects of the Invention As described above, according to the present invention, (1) the oil is pressurized by the oil piston that moves integrally with the hydraulic piston operated by the water pressure of the high pressure part of the pump; The water pressure and the greasing pressure are proportional, and the greasing pressure changes in response to the pressure of the water that is about to enter the bearing, allowing smooth lubricating and eliminating the invading water. (2) The load on the bearing changes depending on the water pressure of the pump, but on the other hand, the greasing pressure changes depending on the water pressure of the pump, so the amount of greasing can be adjusted appropriately depending on the water pressure. It can be increased or decreased. (3) When the pump stops operating, the pressure in the high-pressure part disappears, and for the same reason as mentioned above, the greasing pressure disappears, and greasing stops, thereby avoiding wastage of grease. (4) Since the hydraulic piston and the oil piston are provided separately and are integrally connected,
By appropriately selecting the respective outer diameter dimensions, it is possible to appropriately set the greasing pressure and greasing amount with respect to the pump performance. In particular, the greasing pressure can be increased even when the water pressure of the pump is low. Moreover, since the hydraulic cylinder and oil cylinder are coaxially arranged, the structure is simple.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a fracturing pump equipped with a device according to the invention, and FIG. 2 is a side sectional view of an embodiment of the invention. 25...Bearing section, 61...Hydraulic cylinder, 6
5... Hydraulic piston, 75... Hydraulic chamber, 79...
Hydraulic cylinder, 81...Hydraulic piston, 83...
...Piston rod, 97...Oil chamber.

Claims (1)

[Claims] 1 A hydraulic piston 65 and an oil piston 8 that are slidably fitted into the respective interiors of a hydraulic cylinder 61 and an oil cylinder 79 that are arranged on a coaxial core line.
1 are connected to each other by a piston rod 83, and a hydraulic chamber 75 is provided in the hydraulic cylinder 61 and is formed on the opposite side of the hydraulic piston 65 from the piston rod 83 and communicates with the high pressure part of the pump. In addition, the oil cylinder 79
A grease supply device for a pump characterized in that a grease chamber 97 is formed inside the grease piston 81 on the opposite side of the piston rod 83 and communicates with the bearing portion 25 of the pump.