JPH034880Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention (1) Industrial application field The present invention is suitable for a high viscosity liquid supply device and is mainly used as a lubricating oil supply device for engines.

(2) Prior art A conventional lubricating oil supply device has a camshaft that sucks out liquid by reciprocating in the axial direction as it rotates, and a plunger is slidably inserted into the cam plunger. and cooperates with the plunger according to the degree of rotation and the amount of movement of the camshaft,
There is a device that uses the change in the volume of the liquid chamber between the cam plunger and the plunger to suck and discharge a small amount of liquid.

However, this type of plunger type lubricating oil supply device has the disadvantage that it is expensive because the difference in diameter of each plunger is the basis of the discharge amount, and the outer diameter of the plunger requires accurate machining.

Another conventional technique uses a control valve to control and supply lubricating oil discharged by a pump body using a diaphragm driven by engine pulses, but fluctuations in the engine supply pressure Another disadvantage is that the amount of lubricating oil supplied is not stable due to load fluctuations.

(3) Problems to be solved by the invention The present invention has been made in view of the above points, and its purpose is to obtain a lubricating oil supply device that is simple in construction and inexpensive, and which The purpose is to provide a lubricating oil supply device that can supply stable lubricating oil without variation, correct the effects of viscosity, and control even minute flow rates.

B. Structure of the invention (1) Means and action for solving the problem The invention consists of a rotating body 21 that is driven by an engine and performs rotational movement in a fixed direction, and a liquid conveying means disposed on the outer surface of the rotating body. 22, a pump body P that includes a pump chamber 23 surrounding the rotating body, and a seal body 26 that divides the pump chamber into an inlet 24 side and a discharge outlet 25 side, and a pump body P that pressurizes the pump body. a valve housing having an inlet port 1 and an outlet port 2 for the fluid to be discharged; and a pressure receiving body 5 that divides the inside of the valve housing into a high pressure chamber 3 and a low pressure chamber 4.
, a side passage 6 communicating the two chambers, and a control valve 7 that comes into contact with the pressure receiving body and moves together in response to its displacement.
and a spring 8 compressed between the control valve and the valve housing.
A variable constant flow rate control valve 12 that controls the flow rate of the fluid at a constant level by slidably fitting the control valve into the outlet 2 and changing the set value of the constant flow rate. By adopting a lubricating oil supply device composed of a valve V, it is possible to provide a lubricating oil supply device having a simple and inexpensive pump body, and also to provide a variable type lubricating oil pressurized by the pump body. Since the lubricant is supplied via a constant flow valve, it is possible to correct the fluctuation in flow rate due to the influence of the viscosity of the lubricant, supply a stable lubricant, and furthermore, we have been able to provide a lubricating oil supply device that can control even small amounts of flow. be.

(2) Embodiment To explain one embodiment of the present invention with reference to the drawings, the outlet of a container 32 containing fluid such as lubricating oil is connected to the inlet 24 of a pump body P equipped with a rotating body 21 driven by an engine. The lubricating oil pressurized by the pump body is controlled via a variable constant flow valve V disposed at the discharge port 25 of the pump body, and the lubricating oil is controlled through a variable constant flow valve V disposed at the discharge port 25 of the pump body, and the lubricating oil is controlled to rotate the chainsaw 33 driven by the engine. chain 34
The lubricating oil is supplied from a nozzle 35 to the nozzle 35.

The pump body P has a ring-shaped rotating body 21 fixed to the drive shaft 27 of the engine 20 that rotates counterclockwise together with the drive shaft, and conveys fluid in the rotational direction to the outer periphery or side surface of the rotating body. A V-groove-shaped liquid conveyance means 22 is disposed and configured. The liquid conveying means may include a plurality of protrusions on the rotating body 21, and the shape thereof can be arbitrarily changed. Rotating body 2
In the pump chamber 23 surrounding the pump chamber 1, the gap size between the inner periphery of the casing 28 and the outer periphery of the rotating body 21 is appropriately set according to the viscosity of the fluid, and the inner periphery of the casing and the outer periphery of the rotating body are not in contact with each other. A seal body 26 that divides the pump chamber into the suction port 24 side and the discharge port 25 side is fixed to the housing 28 and is in line contact with the rotating body 21. Seal body 26
is elastically sealed with a material such as rubber, resin, or metal, but the contact pressure with the rotating body 21 is preferably low. The discharge port 25 and the suction port 24 are connected by a communication path 29 arranged in the housing 28, and throttles 30 and 31 are arranged in the communication path and the discharge port, respectively.
The aperture may be omitted.

The present invention supplies lubricating oil pressurized by the pump body P through a variable constant flow valve V. The variable constant flow valve includes a fluid inlet 1. A valve housing is constituted by a valve cover 13 and a valve body 14 having an outlet 2, and a pressure receiving body 5 whose outer periphery is sandwiched between the valve cover 13 and the valve body 14 divides the inside of the valve housing into two parts. It is divided into a high pressure chamber 3 communicating with the inlet and a low pressure chamber 4 communicating with the outlet. The pressure receiving body 5 is made of rubber shown in the figure,
It includes a thin movable membrane made of resin, metal, etc., and a sliding piston (not shown) slidably fitted within the valve housing. Holding plates 15 and 16 are fixed to both sides of the pressure receiving body 5 by a valve body 10 and a nut 17. The high pressure chamber 3 and the low pressure chamber 4 are communicated via a side passage 6 arranged in the valve housing, and a control valve 12 that changes the effective flow area of the side passage 6 is arranged in the valve housing. has been done. The control valve 12 is a rotating screw screwed into the valve housing, but it can be changed to a ball, gate valve, butterfly valve, etc. A valve seat 9 is disposed in the valve casing, which serves as a communication path from the high pressure chamber to the side channel, facing the valve body 10. By moving the valve body from side to side, the valve body 1
0 and the valve seat 9 control opening and closing of the side passage 6.
A control valve 7 having a notch surface 11 inclined at the outer diameter of its sliding portion is fitted into the outlet 2 of the valve housing so as to be slidable left and right. 1
A spring 8 is compressed between the spring receiver 19 fixed at 8 and the valve body 14. The left end hemispherical head of the control valve 7 is pressed leftward by a spring 8 so as to be in constant contact with a nut 17 fixed to the pressure receiving body 5, and is also pressed against the pressure receiving body by the fluid pressure flowing in from the inlet 1. When the valve 5 is pressed to the right, the control valve 7 also moves to the right.

The inclined cutout surface of the control valve 7 can also be shaped like a step.

To explain the operation, when the engine is stopped, the valve body 10 is pressed against the valve seat 9 by the force of the spring 8, and lubricating oil is not supplied.

When the engine starts operating, the drive shaft 27 rotates counterclockwise, and the lubricating oil entering from the suction port 24 is transferred to the discharge port 25 by the liquid conveying means 22 due to the viscous force and centrifugal force of the lubricating oil. It is discharged.

When the force acting on the pressure receiver 5 of the fluid pressure of the lubricating oil flowing into the inlet 1 of the variable constant flow valve V disposed at the discharge port 25 is greater than the force of the spring 8,
The valve body 10 moves to the right, the side passage 6 is opened, and the fluid flows out to the outlet 2. When this fluid is flowing from the inlet 1 to the outlet 2, the force that presses the control valve 7 in the right direction, that is, in the closing direction, is the fluid pressure in the high pressure chamber that acts on the effective pressure receiving area of the pressure receiving body 5. Also, the force that presses the control valve 7 in the leftward direction, that is, in the opening direction, is the sum of the fluid pressure in the low pressure chamber acting on the effective pressure receiving area of the pressure receiving body 5 and the force of the spring 8, and these control valves The effective flow path gap X between the cutout surface 11 and the outlet 2 is variably controlled depending on the magnitude of the force in the left and right direction acting on the outlet 7 . At this time, by appropriately selecting the effective pressure receiving area of the pressure receiving body 5 and the load of the spring 8, the effective flow path gap X is variably controlled in response to changes in the fluid pressure at the inlet 1 or the outlet 2. The flow rate of the fluid flowing out to the outlet 2 through the gap is controlled to be constant.

The technical principle of controlling the flow rate to a constant level regardless of pressure changes at the inlet or outlet is well known (see, for example, Japanese Utility Model Publication No. 1983-3277), so a detailed explanation will be omitted. Even if a fluid pressure fluctuation occurs in the outlet 2, the flow rate remains constant by maintaining the differential pressure between the pressure in the high pressure chamber 3 and the pressure in the low pressure chamber 4 constant. and,
Even when the fluid flow rate passing through the effective flow path gap X is relatively small, the control valve is placed in contact with the pressure receiving body as a separate body in response to displacement of the pressure receiving body, and is slidably fitted in the outlet 2. Therefore, the control valve is self-aligned and is not biased in the radial direction, allowing accurate flow control.

Furthermore, since the control valve 7 and the valve body 10 are separated and supported by a movable membrane such as a diaphragm, the centripetal relationship between the valve body 10 and the valve seat 9 is good, which prevents valve seat leakage. Never. Furthermore, the control valve 12
, the constant flow rate value to be controlled can be arbitrarily changed. The control valve 12 is not limited to a manual valve, and the valve opening degree can be controlled by a motor drive, a proportional electromagnet, or the like.

Next, when the engine stops, the pressure at the inlet port 1 decreases, and the force of the spring 8 causes the valve body 10 to sit on the valve seat 9, completely closing the side passage, thereby preventing lubricating oil from dripping.

In addition to supplying lubricating oil to the rotating chain of a chainsaw driven by the engine, the present invention is also applicable to supplying gasoline, kerosene, alcohol,
It can also be used to supply cutting oil, heavy oil, light oil, etc.

C. Effect of the invention The present invention consists of a rotating body 21 that is driven by an engine and performs rotational movement in a fixed direction, a liquid conveying means 22 arranged on the outer surface of the rotating body, and a pump chamber 23 that surrounds the rotating body. and a seal body 26 that divides the pump chamber into an inlet 24 side and a discharge outlet 25 side, and the pump body has an inlet 1 and an outlet 2 for pressurized fluid. a pressure receiving body 5 that divides the inside of the valve housing into a high pressure chamber 3 and a low pressure chamber 4;
, a side passage 6 that communicates the two chambers, and a control valve 7 that comes into contact with the pressure receiving body and moves together in response to its displacement.
and a spring 8 compressed between the control valve and the valve housing.
and a variable constant flow rate control valve 12 that controls the flow rate of the fluid at a constant level by slidably fitting the control valve into the outlet 2 and changing the set value of the constant flow rate. Since the lubricating oil supply device is made up of a valve V, it is possible to provide a lubricating oil supply device having a simple and inexpensive pump body, and furthermore, the lubricating oil pressurized by the pump body can be supplied at a variable constant flow rate. Since the lubricating oil is supplied through a valve, it is possible to correct variations in the flow rate due to the influence of the viscosity of the lubricating oil, supply a stable lubricating oil, and provide a lubricating oil supply device that can control even minute flow rates.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view showing an embodiment of the lubricating oil supply device of the present invention. 2...Outflow port, 12...Control valve, 21...Rotating body, 22...Liquid conveying means, 23...Pump chamber,
24...Suction port, 25...Discharge port, 26...Seal body, V...Variable constant flow valve.

Claims (1)

[Scope of utility model registration request] A rotating body 21 that is driven by an engine and performs rotational movement in a fixed direction, a liquid conveying means 22 arranged on the outer surface of the rotating body, a pump chamber 23 surrounding the rotating body, and a suction port for the pump chamber. 24 side and outlet 25
a pump body P having a seal body 26 divided into two sides; a valve housing having an inlet 1 and an outlet 2 for pressurized fluid into the pump body; and a high pressure chamber 3 inside the valve housing.
a pressure receiving body 5 that is divided into a low pressure chamber 4, a side passage 6 that communicates the two chambers, a control valve 7 that comes into contact with the pressure receiving body and moves together in response to the displacement of the pressure receiving body, and the control valve and the valve. A spring 8 is compressed between the control valve and the casing, and the control valve is slidably fitted into the outlet 2 to control the flow rate of the fluid at a constant level and change the set value of this constant flow rate. A lubricating oil supply device comprising: a variable constant flow valve V equipped with a control valve 12;