KR-102961736-B1 - Cooling system for rotary positive displacement pump

Abstract

The present invention relates to a cooling system for a rotary positive type pump that cools the interior of one side cover portion of the rotary positive type pump with cooling oil, comprising: a rotary positive type pump including a one side cover portion provided on one side of a housing and having a rotational force transmission means including gears and bearings inside, and a other side cover portion provided on the other side of a housing and having bearings inside; The cooling oil circulation supply means includes a means for recovering oil filled in the first and second side cover portions from the lower part of the first and second side cover portions, cooling the oil, and supplying the cooling oil to the upper part of the interior of the first and second side cover portions in a circulating manner; wherein the cooling oil circulation supply means comprises a cooling oil supply pipe installed in communication with the interior of the first and second side cover portions at the upper part of the first and second side cover portions, an oil recovery pipe installed in communication with the interior of the first and second side cover portions at the lower part of the first and second side cover portions, a known cooling device connected to the oil recovery pipe to cool the oil passing through, a cooling oil tank connected to the discharge side of the cooling device via an oil discharge pipe, and an oil pump having its suction side connected to the cooling oil tank via a cooling oil pumping pipe and its discharge side connected to the oil input side of the cooling oil supply pipe.

Inventors

• 전호영

Assignees

• 전진건설로봇(주)

Dates

Publication Date

20260507

Application Date

20240329

Claims (4)

1. A rotary positive volume pump comprising: a one-side cover portion provided on one side of a housing and having a rotational force transmission means including gears and bearings inside; and a other-side cover portion provided on the other side of a housing and having bearings inside; A cooling oil circulation supply means for recovering oil filled in the first and second side cover portions from the lower part of the first and second side cover portions, cooling the oil, and supplying the cooling oil to the upper part of the interior of the first and second side cover portions to circulate the cooling oil; The above cooling oil circulation supply means is A cooling oil supply pipe installed on the upper part of the above-mentioned first and other side cover parts to communicate with the interior of the first and other side cover parts, and An oil recovery pipe installed at the lower part of the above-mentioned first and other side cover parts to communicate with the interior of the first and other side cover parts, and A known cooling device connected to the above oil recovery pipe to cool the oil passing through, and A cooling oil tank connected to the discharge side of the above-mentioned cooling device and an oil discharge pipe, and It includes an oil pump in which the suction side is connected to the cooling oil tank and the cooling oil pumping pipe, and the discharge side is connected to the oil inlet side of the cooling oil supply pipe. Two pairs of driving shafts and driven shafts are arranged in the vertical direction, forming two pumping chambers in the vertical direction, and The above other side cover part is provided with two in the upper and lower directions, and A cooling system for a rotary positive displacement pump characterized in that the interiors of the two other side cover parts are connected by an oil connecting pipe.
2. In paragraph 1, A cooling system for a rotary positive displacement pump, characterized in that the above oil pump is installed on the outside of the outer plate of one side cover portion, and the driving rotating shaft penetrates the outer plate of one side cover portion and is connected so that the driving rotating shaft rotates in conjunction with one of the driving shafts or one of the driven shafts.
3. In paragraph 1, The above cooling oil supply pipe A main pipe with an oil inlet side connected to the discharge side of the above oil pump, and One and other branch pipes branched from the discharge side of the main pipe to the one and other sides, and One or more one-side supply pipes branched from the above one-side branch pipe and installed on the upper part of the one-side cover part so as to communicate with the interior of the one-side cover part, and A cooling system for a rotary positive volume pump characterized by including a branch pipe that branches off from the above-mentioned branch pipe and is installed on the upper part of the above-mentioned cover part to communicate with the interior of the above-mentioned cover part.
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Description

Cooling system for rotary positive displacement pump The present invention relates to a cooling system for a rotary positive displacement pump, and more specifically, to a cooling system for a rotary positive displacement pump that cools the interior of one or the other side cover portion of the rotary positive displacement pump with cooling oil. Generally, rotary positive displacement pumps are pumps that transport fluid by the meshing of two gears (rotors) of the same shape, and they have the advantages of being lightweight and having a simple structure. Since these rotary positive displacement pumps are designed to prevent backflow, they also have the advantage of not requiring a valve. Accordingly, as an example of a conventional rotary positive displacement pump, the "gear pump" of Korean Patent Registration No. 2218851 (hereinafter referred to as the "conventional gear pump") is known. A conventional gear pump comprises a housing having a fluid inlet and an outlet, a driving shaft and a driven shaft arranged parallel to each other along an axis extending transversely to the fluid flow direction, and a gear unit comprising a driving gear and a driven gear that are respectively coupled to the driving shaft and the driven shaft and rotate in mutual meshing. The above housing consists of a body having a fluid intake port and an exhaust port, and a pair of cover plates coupled to both sides of the body. However, the conventional gear pump configured as described above had a problem in which high temperatures were generated in the radial bearings and thrust bearings that support the rotation of the drive shaft and the driven shaft during operation, causing the gear pump to be damaged in a short period of time due to the high temperatures. In addition, when manufacturing a large-capacity pump by increasing the volume of a conventional gear pump, the radial bearings and thrust bearings constituting the gear pump are subjected to heavy loads, and high temperatures are generated in the radial bearings and thrust bearings, which has the problem of being difficult to manufacture as a large-capacity gear pump. FIG. 1 is a perspective view showing a cooling system of a rotary positive displacement pump according to the present invention. FIG. 2 is a rear view showing a cooling system of a rotary positive displacement pump according to the present invention. FIG. 3 is a cross-sectional view showing the configuration of a cooling system for a rotary positive displacement pump according to the present invention. FIG. 4 is a cross-sectional view showing the operating state of a cooling system of a rotary positive displacement pump according to the present invention. Preferred embodiments of the present invention are described in more detail below with reference to the accompanying drawings. However, it should be understood that the present invention may be implemented in a number of different forms and is not limited to the described embodiments. FIG. 1 is a perspective view showing a cooling system for a rotary positive displacement pump according to the present invention, FIG. 2 is a rear view showing a cooling system for a rotary positive displacement pump according to the present invention, FIG. 3 is a front cross-sectional view showing the configuration of a cooling system for a rotary positive displacement pump according to the present invention, and FIG. 4 is a front cross-sectional view showing the operating state of a cooling system for a rotary positive displacement pump according to the present invention. As illustrated in the drawing, the cooling system of a rotary positive displacement pump according to the present invention cools the interior of a one-sided cover portion provided on one side of the housing and the interior of a other-sided cover portion provided on the other side of the housing with cooling oil supplied through circulation when the rotary positive displacement pump is in use, and includes a rotary positive displacement pump (1) and a cooling oil circulation supply means (2). The above rotary positive displacement pump (1) sucks in fluid from the front and pumps it to the rear for discharge, and includes a housing (11), a drive shaft (12) and a driven shaft (13), a drive gear (14) and a driven gear (15), a one-sided cover part (16), and a other-sided cover part (19). The above housing (11) is provided with one or more pumping chambers (111) that are open on both sides inside and have an intake port (112) for sucking in fluid and an exhaust port (113) for discharging fluid formed at the front and rear. The above drive shaft (12) and driven shaft (13) are arranged transversely on the lower and upper sides of one or more pumping chambers (111), and each drive shaft (12) and driven shaft (13) is arranged so as to protrude to one or the other side of the pumping chamber (111). The above driving gear (14) and driven gear (15) are installed to mesh with each other on the driving shaft (12) and th