KR20070023213A - oil-gear pump having a structure of Magnetic sealant - Google Patents

Abstract

According to the present invention, the oil gear pump leaks oil due to pressure during high speed rotation, and the internal pressure drops, and prevents errors from occurring during high speed rotation due to continuous oil leakage, thereby increasing the high speed rotation speed and performance of the gear pump as much as possible. An oil gear pump having a magnetic sealing structure can be provided.

The present invention is provided with a magnetic sealing member and a leakage preventing device made of carbon packing on the main shaft installed to penetrate the inside of the housing of the gear pump, even though the internal pressure is increased due to the high speed rotation of the main shaft. The oil can be prevented from leaking, and the oil leakage caused by the high-speed rotation can be suppressed to the maximum, thereby increasing the maximum high-speed rotational power of the gear pump to improve output performance due to rotation.

Gear pump, oil, main shaft, idle shaft, housing

Description

Oil-gear pump having a structure of Magnetic sealant

1 is an exploded perspective view showing an oil leakage preventing opening of a gear pump according to the present invention;

Figure 2 is a perspective view of the main part showing the oil leakage prevention port of the gear pump according to the present invention,

Figure 3 is a longitudinal sectional view showing an oil leakage prevention port of the gear pump according to the present invention,

Figure 4 is an enlarged cross-sectional view of the main portion of the oil leakage prevention port of the gear pump according to the present invention.

<Explanation of symbols for the main parts of the drawings>

2: housing 3: main shaft

3 ': electric gear 4: gear case

5: Children shaft 5 ': driven gear

10: Leakage prevention device 11: Magnetic sealing member

12: carbon packing 12 ": carbon ring

The present invention relates to an oil leak prevention device of a gear pump, and more particularly, oil leaks due to pressure during high speed rotation of a gear pump using oil, and internal pressure drops, and an error occurs during high speed rotation due to continuous oil leakage. The present invention relates to an oil gear pump having a magnetic sealing structure that prevents the oil leak from being prevented from occurring and improves sealing by interposing a carbon packing and a magnetic sealing member.

In general, a gear pump is used to supply fuel at a predetermined pressure by using a rotational force, and is classified into a low speed gear pump and a high speed gear pump according to the intended use. The pressure of the fuel to be supplied is set.

Primarily, gear pumps are used to supply fluid, and rotational forces for output are generated while the electric shaft or the driven shaft are engaged with the gear system and rotated, and oil for cooling and lubrication is injected into the rotating gear part. .

Currently, the gear pump used is installed to rotate the main shaft and the idle shaft in the housing and gear case, the electric gear is coupled to the main shaft, the driven gear is coupled to the idle shaft, the electric gear and the driven gear Are engaged with each other and are configured to rotate in engagement with the rotation of the main shaft.

In addition, as the electric gear of the main shaft and the electric gear of the idle shaft are rotated to be engaged, oil for cooling and lubrication is injected, and packing, O-ring, and gasket for leaking of the injected oil are installed.

In particular, the high speed rotation gear pump is rotated at a high speed, so that the internal pressure is high, and precise leakage prevention is required to block the leakage of oil due to the high pressure.

However, in the conventional gear pump, rubber packing or O-ring is used as a means for preventing leakage of oil injected when the main shaft is rotated. However, in the case of a low speed gear pump, oil leakage prevention is normally performed. In the case of a gear pump for a pump, a gap occurs due to deformation of a rubber material or an o-ring due to an internal pressure increase due to a high speed, or oil leaks due to a gap generated in a coupling part. It is happening.

Therefore, until now, the gear pump is leaking oil due to the pressure increase due to the high speed rotation, it is limited to increase the rotational force of the high speed rotation gear pump.

In addition, it is cumbersome and wasted because oil has to be re-injected periodically, and the rotational force of gear pumps, especially high-speed rotary gear pumps, is limited. Therefore, there are many problems such as hassle and excessive cost is consumed according to the production.

The present invention is to solve the conventional problems as described above, the purpose is to prevent the leakage of the oil injected therein due to the internal pressure rise due to the high-speed rotation of the main shaft constituting the gear pump By reducing the oil leakage caused by the high speed rotation as much as possible, the maximum high speed rotational power of the limited gear pump is improved to improve the output performance according to the rotation, and the oil of the new type of the pump pump has little concern about oil leakage. It is to provide a leak prevention device.

In addition, another object of the present invention is to improve the performance by improving the rotational force for the high-speed rotation of the gear pump, and to solve the output degradation and errors due to oil leakage, thereby improving the workability and productivity according to the gear pump manufacturing To provide a high performance product at a low cost.

In particular, the present invention is to close the friction part by the magnetic force of the magnet when the pump is stopped to prevent the leakage of the friction part, and to close the friction part by the pressure in the pump during rotation to lubricate and cool the friction part with the circulating oil In order to prevent the leakage of the friction part by contacting the friction part by the magnetic force of the magnet when the pump is stopped, the friction part can be closely contacted by the internal pressure of the pump so that the lubrication and the cooling of the friction part can be achieved.

 In order to achieve the above object, the present invention, the main shaft and the idle shaft (idle shaft) is internally rotated in the housing and the gear case, the electric gear is coupled to the main shaft, the driven gear is coupled to the idle shaft, Gears and driven gears are meshed with each other to rotate when the main shaft is rotated, oil is injected into the area where the front and driven gears are engaged, and in the gear pump that the packing and O-rings are installed to prevent oil leakage. The main shaft, which is built to penetrate the inside of the housing, has a magnetic sealing member and a leakage preventing device made of carbon packing.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

As shown in Figures 1 to 4, the oil leakage preventing device 10 of the gear pump according to the present invention is coupled to the main shaft (3) installed to penetrate the interior of the housing (2) to prevent leakage of the injected oil It is to prevent, it is composed of the magnetic sealing member 11 and the carbon packing (12).

At this time, the O-ring 11 'of a rubber material is wound around and coupled to the magnetic sealing member 11 of the oil leakage preventing opening 10, and the carbon packing 12 is connected to the main shaft 3 by the magnetic force of the magnetic sealing member 11. In the state coupled to the), it is fixed to the magnetic sealing member 11, and the O-ring 12 'and the carbon ring 12 "is coupled to the inside of the carbon packing 12 by the magnetic sealing member 11 and the magnetic force In the process of being in close contact, the magnetic sealing member 11 is pressed.

1 is an exploded perspective view showing an oil leak prevention port of the gear pump according to the present invention, Figure 2 is a perspective view showing the main part of the oil leakage prevention port of the gear pump according to the present invention, Figure 3 is a gear pump of the present invention As a longitudinal cross-sectional view showing the oil leakage preventing device, the housing 2 and the gear case 4 are coupled to the main shaft 3 to which the electric gear 3 'is coupled and the idle shaft 5 to which the driven gear 5' is coupled. Are interlocked with each other and rotated, and the electric gear 3 'and the driven gear 5' are interlocked with each other and rotated, and the housing 2 and the gear case in which the main shaft 3 and the idle shaft 5 are installed. (4) A certain amount of oil is injected inside.

In particular, the main shaft 11 is coupled to the oil leakage preventing device 10 for preventing the leakage of the injected oil, the oil leakage preventing device 10 is a magnetic sealing member 11 and carbon packing having a predetermined magnetic force It consists of (12), the carbon packing 12 is in contact with each other by the magnetic force of the magnetic sealing member 11 in a state coupled to the main shaft (3).

In addition, since the O-ring 11 'is wound around the outer circumferential surface of the magnetic sealing member 11 coupled to the main shaft 3 to prevent oil leakage, oil leakage of the housing 2 is caused by the O-ring 11'. The sealing is made for prevention, and the carbon packing 12 is coupled to the main shaft 11 and made to be in close contact with the magnetic sealing member 11 by magnetic force, so the main shaft 3 and the magnetic sealing member at high speed rotation. It is to prevent the oil leak on the coupling portion of (11).

Figure 4 is an enlarged cross-sectional view of the main portion of the oil leakage prevention port of the gear pump according to the present invention, the magnetic sealing member 11 and the carbon packing 12 is fitted into the main shaft (3) installed through the inside of the housing (2). In order to prevent oil leakage, the valve is fitted within a minimum tolerance range and is coupled in a tight state by the magnetic force of the magnetic sealing member 11.

Oil is injected into the housing 2 through which the main shaft 3 penetrates, and the injected oil is not leaked to the outside by the magnetic sealing member 11, the carbon packing 12, and the O-rings 11 ′ and 12 ′. The sealing of the contact portion between the inner surface of the housing 2 and the magnetic sealing member 11 is made by an O-ring 11 ', and the sealing portion between the main shaft 3 and the magnetic sealing member 11 is connected to each other. Sealing is made by the carbon packing (12).

At this time, since the O-ring 12 'and the carbon ring 12 "are coupled to the inside of the carbon packing 12, the carbon packing 12 is pressed in the process of being in close contact with the magnetic sealing member 11. It will be sealed.

As described above, a state of use of the oil leakage prevention tool of the gear pump according to the present invention is as follows.

As shown in FIGS. 1 to 4, the main shaft 3 and the idle shaft 5 in which the electric gear 3 ′ and the driven gear 5 ′ are coupled to the housing 2 and the gear case 4, respectively. ) Is internally rotated, and a certain amount of oil is injected therein, but the magnetic sealing member 11 and the carbon packing 12 are coupled to the main shaft 3 to prevent leakage of the injected oil. O-ring 11 'is fitted to the outer circumferential surface of 11, and O-ring 12' and carbon ring 12 &quot; are coupled to each other in the carbon packing 12, respectively, by the respective O-rings 11 'and 12'. Sealing of the contact area is made, in particular, the carbon packing 12 is tightly coupled by the magnetic force of the magnetic sealing member 11, in the process of being in close contact by the magnetic force, the carbon ring 12 " ) Is pressed against the surface of the magnetic sealing member 11 to prevent leakage.

As such, the electric gear 3 'and the driven gear 5' are rotated in a state in which they are installed in the housing 2 and the gear case 4 and are engaged with each other by the rotation of the main shaft 3, thereby providing a predetermined output. In the case of a high speed rotation gear pump, the main shaft 3 rotates at a high speed of 8,000 rpm or more, and the pressure inside the housing 2 increases due to the rotational force during the high speed rotation, thereby providing a high performance output. Will be.

In this process, when the oil injected into the housing 2 rises due to the high speed rotation, the oil may leak to the outside through the coupling portion of the main shaft 3 and the housing 2. As in the invention, since the O-ring 11 'is coupled between the housing 2 and the magnetic sealing member 11, leakage is prevented.

In addition, the carbon packing 12 is closely coupled by magnetic force to a portion coupled between the main shaft 3 and the magnetic sealing member 11, and a carbon ring 12 ″ coupled to the inside of the carbon packing 12 is provided. Since the surface is pressed to form a high pressure rotation, even if the internal pressure rises, the injected oil is sealed by the magnetic sealing member 11 and the carbon packing 12 to prevent leakage.

Oil leak prevention device 10 of the gear pump according to the present invention is the magnetic sealing member 11 and the carbon packing 12 is closely coupled by the magnetic force, the leakage phenomenon that occurs in the existing gear pump, that is, the main shaft (3) and the magnetic sealing member (11) through the micro-gaps generated between the joints can completely prevent the leakage of oil injected therein, as well as the rotational force of the gear pump up to 1,2000rpm Since it can be increased, the performance of the gear pump output can be maximized.

As such, by using the oil leakage prevention tool of the gear pump according to the present invention, even if the internal pressure due to the high-speed rotation of the main shaft is increased, it is possible to prevent the oil injected into the inside, due to the high-speed rotational force By suppressing the oil leakage as much as possible, it is possible to obtain the effect of improving the maximum high-speed rotational power of the gear pump to improve the output performance according to the rotation.

In addition, the present invention improves the performance by improving the rotational force for the high-speed rotation of the gear pump, by eliminating the output degradation and errors due to oil leakage, improve the workability and productivity according to the gear pump production, and inexpensive There is an economic effect that can provide a high-performance product at a cost, in particular, the present invention to close the friction portion by the magnetic force of the magnet when the pump stops to prevent the leakage of the friction portion, the friction portion by the pressure in the pump during rotation In close contact there is an effect that lubrication and friction cooling can be achieved by the circulation oil.

Claims (3)

The main shaft 3 and the idle shaft 5 are rotated in the housing 2 and the gear case 4, and the electric gear 3 ′ is coupled to the main shaft 3, and the idle shaft ( 5) is coupled to the driven gear (5 '), the electric gear (3') and the driven gear (5 ') is meshed with each other and interlocked when rotating the main shaft (3), and the electric gear (3') and In the gear pump configured to inject oil into the area where the driven gear (5 ') is engaged, the packing and the O-ring is installed in order to prevent oil leakage, An oil gear having a magnetic sealing structure, characterized in that the main shaft (3) internally penetrated through the housing (2) has a magnetic sealing member (11) and a leakage preventing device (10) made of carbon packing (12). Pump. The method of claim 1, Carbon packing 12 is coupled to the main shaft (3) is an oil gear pump having a magnetic sealing structure, characterized in that closely coupled by the magnetic force of the magnetic sealing member (11). The method of claim 1, The O-ring 11 'is wound around the magnetic sealing member 11 of the leakage preventing device 10, and the carbon packing 12 has an O-ring 12' and a carbon ring 12 " Oil gear pump having a magnetic sealing structure.

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