CN100374738C - Self-lubricating axial piston water motor - Google Patents

Abstract

The self-lubricating axial plunger water motor of the present invention is most suitable for the power source of a small fan where even-angle gas is accumulated on the coal mining working face (lower) of the coal mine. It is mainly composed of the main shaft, the water inlet and outlet tray, the pump body and the rear end seat. The outer side of the rear end seat is provided with an outer groove that can hold auxiliary lubricants, and the end of the outer groove is provided to form a closed space (A) The sealing cover is provided with a central small hole (B) and a small hole (C) at a certain distance from it on the rear end seat, and a small hole (D) for internal reflux is opened on the wall of the water outlet. The motor can directly use the existing high-pressure water or emulsion in the coal mine as the power source. It has the characteristics of internal backflow and the function of automatically adding auxiliary lubricant, so it can greatly increase the motor speed, reduce the wear of the motor, and improve the efficiency of the motor. The reliability and service life of the motor operation. It is compact in structure, small in size, light in weight, safe and reliable, easy to use, and has extensive practicability.

Description

Self-lubricating axial piston water motor

1. Technical field

The invention relates to a self-lubricating axial plunger water motor, which is especially suitable for the power source of a small fan where gas is accumulated at even angles on the (lower) coal mining working face of a coal mine, and is also suitable for dangerous occasions where electricity cannot be used as power.

2. Background technology

The ventilation blind corners of gas mines (such as coal mining face and lower corners) are the places where gas is most likely to accumulate, and are also areas with high incidence of gas accidents in coal mines. Because the gas at the working face exceeds the limit, the coal mine safety regulations stipulate that the production must be stopped for gas discharge, and the production cannot be resumed until the gas concentration drops below the safety line. Since the area where the gas exceeds the limit cannot be directly blown by an electric fan, it is very urgent to use a water motor jet fan to blow out the accumulated gas in coal mine production, no matter in terms of safety or productivity. Therefore, domestic and foreign countries have been researching equipment that can effectively control even-angle gas accumulation on coal mining face. At present, the treatment methods for even-angle gas accumulation on the coal mining face of coal mines can be summarized as rowing, guiding, blowing, guiding, pumping, etc. The specific representative methods are: ① set up wind barriers or partition walls at the corners of the working surface, and use non-sparking local fans for exhaust; ② use air flow ejectors and explosion-proof local fans for exhaust; ③ use automatic control systems to The gas in the goaf is forcibly pumped out at the corner to reduce the natural gushing amount; ④Use a radial jet fan to generate pulsating jet for blowing; ⑤Use an axial jet turbulent fan for blowing. In addition, there are methods such as changing the ventilation method and increasing the main ventilation volume.

①②③It is effective to control the accumulation of gas in even angles, but they all adopt the system of electric local fans and exhaust ducts, which is inconvenient to move and relocate, and the gas in the exhaust ducts must be prevented from exceeding the limit during use. The methods ④ and ⑤ use a small hydraulic fan placed at the upper corner to blow air directly, which has the advantages of simple system, convenient relocation, and large control range. Because it uses a safe hydraulic power source with no spark performance, it can be used to treat existing Excess gas in the upper corner, which is very much needed in coal mines. However, if this method is to be popularized and applied, the key issues that need to be solved are: ① The motor is required to be compact, small in size and light in weight; ② The motor is required to have the function of automatically adding auxiliary lubricant, so as to increase the speed of the motor and facilitate driving. Fan impeller and improve the reliability and service life of the motor.

3. Contents of the invention

Technical problem: The purpose of this invention is to provide a self-lubricating axial plunger water motor with compact structure, small volume, light weight, low wear, reliable performance and long service life.

Technical solution: The self-lubricating axial plunger water motor of the present invention includes a main shaft driven by high-pressure water or emulsion, a water inlet and outlet plate, a static plate, a moving plate rotor, a compression spring, a pump body, a plunger, and a compression sleeve , return plate, sliding shoe, needle bearing and swash plate, the pump body is provided with a rear end seat matching its end face and inner hole, and the inner side of the rear end seat is provided with an inner groove for placing the swash plate; the rear end seat There is an outer groove on the outside that can hold auxiliary lubricant, and the end of the outer groove is provided with a sealing cover to form a closed space A, and the groove wall of the outer groove is provided with a hole for injecting lubricant and oil into the closed space A , The interlayer of the inner and outer grooves of the rear end seat is provided with a small hole B in the center of the rear end seat and a small hole C in the side of the rear end seat that make the inner and outer grooves communicate.

The self-lubricating axial plunger water motor of the present invention has a small backflow hole D communicating with the water outlet E on the wall of the water outlet of the water inlet and outlet tray; the end of the power output main shaft is provided with a The fan impeller mounted on the main shaft, the threaded inner hole to prevent the impeller from slipping out; the connection between the rear end seat and the pump body can be a screw connection or a threaded connection; the rear end of the rear end seat connected to the inner and outer grooves The small hole C on the side of the seat is set at a distance of 1/3 to 7/8 of the radius of the inner groove from the center; the small hole B in the center of the rear end seat is provided with a liquid inlet pipe.

Technical effect: The self-lubricating axial plunger water motor of the present invention is most suitable for the power source of a small-scale fan where even-angle gas is accumulated on the coal mining face (lower) of a coal mine, and can also be used as a general fluid machine. The pump body is equipped with a rear end seat that can contain auxiliary lubricant, and a small hole is opened on the wall of the water outlet to realize internal backflow. It can directly use the existing high-pressure water or emulsion in the coal mine as the power source. It can be internally recirculated and has the function of automatically adding auxiliary lubricant, so it can greatly increase the speed of the motor and reduce the wear of the motor, thereby improving the reliability and service life of the motor. It has a compact structure, small size, and light weight. It is safe and reliable, easy to use, and has a wide range of practicability.

4. Description of drawings

The accompanying drawing is a structural diagram of the self-lubricating axial plunger water motor of the present invention.

In the figure: main shaft-1, water inlet and outlet plate-2, static plate-3, moving plate rotor-4, compression spring-5, pump body-6, plunger-7, compression sleeve-8, return plate-9 , Sliding shoe-10, needle roller bearing-11, swash plate-12, rear end seat-13, liquid inlet pipe-14, sealing cover-15.

5. Specific implementation

An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

The self-lubricating axial plunger water motor of the present invention is mainly composed of a main shaft 1, an inlet and outlet water plate 2, a static plate 3, a moving plate rotor 4, a compression spring 5, a pump body 6, a plunger 7, a compression sleeve 8, and a return plate 9. Sliding shoe 10, needle roller bearing 11, swash plate 12, rear end seat 13, liquid inlet pipe 14, sealing cover 15 and other components. There is a liquid inlet G and a liquid outlet E on the water inlet and outlet pan 2, the main shaft 1 passes through the water inlet and outlet pan 2 and is connected to the pump body 6 through the bearing in the water inlet and outlet pan, and the water inlet and outlet pan 2 is connected to the pump body 6 Fix with screws. The main shaft 1 and the moving disc rotor 4 are connected by splines, and one end face of the moving disc rotor 4 that is sheathed in the needle bearing 11 is closely attached to the static disc 3, and the other end face is provided with a plurality of plunger holes; 10. The hinged plunger 6 passes through the round hole on the return plate 9 and is inserted into the plunger hole of the rotor 4. Through the set compression spring 5, compression sleeve 8 and return plate 9, the sliding shoe 10 can always In contact with the swash plate 12, the moving disc rotor 4 is always in contact with the static disc 3. The rear end seat 13 is fixed on the pump body 6 by screws, the swash plate 12 is installed in the inner groove of the rear end seat 13, and the outer side of the rear end seat 13 is provided with an outer groove that can hold auxiliary lubricant, and the end of the outer groove There is a sealing cover 15 on the part to form a closed space A, the outer groove wall is provided with an oil hole for injecting lubricant into the closed space A, and the inner and outer grooves of the rear end seat 13 are provided with inner and outer grooves. The central small hole B of the rear end seat and the small hole C on the side of the rear end seat connected by the grooves, the central small hole B of the rear end seat is provided with a liquid inlet pipe 14, and the small hole C on the side of the rear end seat is set at a distance of about 1/3~ from the center. 7/8 the position of the inner groove radius; on the wall of the water outlet of the water inlet and outlet tray 2, there is a small backflow hole D communicated with the water outlet E. The spaces A, M, F, N in the pump body and the water outlet E are connected to each other, and the end of the power output main shaft 1 is provided with a threaded inner hole, which is used to lock the fan impeller mounted on the main shaft and prevent the impeller from The wheel slips out. In the closed space A of the rear end seat 13, a liquid lubricant with a specific gravity different from that of water, which is not easy to mix with water, and has high adhesion with solids is injected. Due to the centrifugal pressure difference of the fluid in the M cavity, the rear end seat 13 There is a pressure difference between the small hole B in the center of the rear end seat on the top and the small hole C on the side of the rear end seat on the side. It flows out into cavity M through the liquid inlet pipe 14 and the small hole B in the center of the rear end seat, and at the same time, the emulsion (or water) in the M cavity also flows into cavity A through the small hole C on the side of the rear end seat, and flows out into cavity M The lubricant will be more or less attached to the friction pair to realize automatic lubrication, thus playing a role in reducing friction.

The function of the motor to automatically add auxiliary lubricant is based on the fact that the rotating liquid in fluid mechanics has an additional centrifugal pressure P ₁ . When the rotor 4 rotates, it will drive the liquid in the cavity F to also rotate. Its size is:

${\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="p"\; filenames="C20061003883600061.png"\; state="\{\{state\}\}">p</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; k</span>}\frac{{\mathrm{<span\; class="notranslate">\; \&rho;\&omega;</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; r</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}$

In the formula: ρ is the density of the liquid; ω is the angular velocity of the liquid rotation; r is the radius of the liquid; k is a coefficient related to the structure. According to hydrostatics, this pressure _P1 will also be transmitted to the fluid communicating with it, such as the M cavity.

Its working principle: When the water inlet G of the hydraulic motor is connected to the high-pressure emulsion, several plungers 7 located on the inlet side are simultaneously affected by the high-pressure liquid, and move to the left relative to the rotor 4 of the moving plate. The limit of related parts such as disc 12, needle roller bearing 11 and static disc 3 forces plunger 7 to rotate to the left while driving disc rotor 4 and transmits this rotation to main shaft 1 through splines. When the plunger 7 has just slid past the left dead point and needs to move to the right under the limit of the swash plate 12, the plunger chamber is connected to the water outlet E, and the low-pressure water in the plunger chamber is squeezed out, as long as the water inlet G Always turn on the high-pressure emulsion to make the main shaft 1 rotate continuously. The emulsion that leaks into the chambers F, M and N from each gap will flow into the water outlet E from the return hole D, so as to ensure that the fluid in the chamber F is relatively low pressure, and maintain the moving disk rotor 4 to produce a leftward action The total pressure, so that the pressing force between the moving plate 4 and the static plate 3 basically remains unchanged.

Claims (6)

1. The utility model provides a self-lubricating axial plunger water motor, it includes main shaft (1) with water under high pressure or emulsion drive, business turn over water dish (2), quiet dish (3), driving disk rotor (4), compression spring (5), the pump body (6), plunger (7), compresses tightly cover (8), return stroke dish (9), piston shoes (10), needle bearing (11) and sloping cam plate (12), its characterized in that: a rear end seat (13) matched with the end surface and the inner hole of the pump body (6) is arranged on the pump body, and an inner groove for placing the swash plate (12) is formed in the inner side of the rear end seat (13); the outer side of the rear end seat (13) is provided with an outer groove capable of containing auxiliary lubricant, the end part of the outer groove is provided with a sealing cover (15) which enables the outer groove to form a closed space (A), the wall of the outer groove is provided with an oil hole for injecting lubricant into the closed space (A), and the interlayer of the inner groove and the outer groove of the rear end seat (13) is provided with a rear end seat central small hole (B) and a rear end seat side small hole (C) which enable the inner groove and the outer groove to be communicated.

2. The self-lubricating axial plunger water motor of claim 1, wherein: a backflow small hole (D) communicated with the water outlet (E) is formed in the wall of the water outlet of the water inlet and outlet tray (2).

3. The self-lubricating axial plunger water motor of claim 1, wherein: the end of the power output main shaft (1) is provided with a threaded inner hole for locking a fan impeller arranged on the main shaft and preventing the impeller from sliding out.

4. The self-lubricating axial plunger water motor of claim 1, wherein: the rear end seat (13) is connected with the pump body (6) by adopting screw connection or threaded connection.

5. The self-lubricating axial plunger water motor of claim 1 or 4, wherein: and a rear end seat side small hole (C) which is communicated with the inner groove and the outer groove of the rear end seat (13) is arranged at a position which is 1/3-7/8 of the distance from the center to the radius of the inner groove.

6. The self-lubricating axial plunger water motor of claim 1, wherein: a liquid inlet pipe (14) is arranged on the small central hole (B) of the rear end seat.

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